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netlink: Rename pid to portid to avoid confusion
[GitHub/mt8127/android_kernel_alcatel_ttab.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 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the
20 * Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
52858b51 24#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
20c239c1 25
4d12b8b1
LRV		 26#include <net/genetlink.h>
27#include <linux/nfc.h>
28#include <linux/slab.h>
29
30#include "nfc.h"
31
32static struct genl_multicast_group nfc_genl_event_mcgrp = {
33 .name = NFC_GENL_MCAST_EVENT_NAME,
34};
35
e5fe4cf8 36static struct genl_family nfc_genl_family = {
4d12b8b1
LRV		 37 .id = GENL_ID_GENERATE,
38 .hdrsize = 0,
39 .name = NFC_GENL_NAME,
40 .version = NFC_GENL_VERSION,
41 .maxattr = NFC_ATTR_MAX,
42};
43
44static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
45 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
46 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
47 .len = NFC_DEVICE_NAME_MAXSIZE },
48 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
1ed28f61
SO		 49 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
50 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
c970a1ac 51 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
fe7c5800
SO		 52 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
53 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
4d12b8b1
LRV		 54};
55
56static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
0a40acb2 57 struct netlink_callback *cb, int flags)
4d12b8b1
LRV		 58{
59 void *hdr;
60
15e47304 61 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
0a40acb2 62 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
4d12b8b1
LRV		 63 if (!hdr)
64 return -EMSGSIZE;
65
66 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
67
1e6428d8
DM		 68 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
69 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
70 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
71 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
72 goto nla_put_failure;
73 if (target->nfcid1_len > 0 &&
74 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
75 target->nfcid1))
76 goto nla_put_failure;
77 if (target->sensb_res_len > 0 &&
78 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
79 target->sensb_res))
80 goto nla_put_failure;
81 if (target->sensf_res_len > 0 &&
82 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
83 target->sensf_res))
84 goto nla_put_failure;
4d12b8b1
LRV		 85
86 return genlmsg_end(msg, hdr);
87
88nla_put_failure:
89 genlmsg_cancel(msg, hdr);
90 return -EMSGSIZE;
91}
92
93static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
94{
95 struct nfc_dev *dev;
96 int rc;
97 u32 idx;
98
99 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
0a40acb2
SO		 100 nfc_genl_family.attrbuf,
101 nfc_genl_family.maxattr,
102 nfc_genl_policy);
4d12b8b1
LRV		 103 if (rc < 0)
104 return ERR_PTR(rc);
105
106 if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX])
107 return ERR_PTR(-EINVAL);
108
109 idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]);
110
111 dev = nfc_get_device(idx);
112 if (!dev)
113 return ERR_PTR(-ENODEV);
114
115 return dev;
116}
117
118static int nfc_genl_dump_targets(struct sk_buff *skb,
0a40acb2 119 struct netlink_callback *cb)
4d12b8b1
LRV		 120{
121 int i = cb->args[0];
122 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
123 int rc;
124
4d12b8b1
LRV		 125 if (!dev) {
126 dev = __get_device_from_cb(cb);
127 if (IS_ERR(dev))
128 return PTR_ERR(dev);
129
130 cb->args[1] = (long) dev;
131 }
132
d4ccb132 133 device_lock(&dev->dev);
4d12b8b1
LRV		 134
135 cb->seq = dev->targets_generation;
136
137 while (i < dev->n_targets) {
138 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
0a40acb2 139 NLM_F_MULTI);
4d12b8b1
LRV		 140 if (rc < 0)
141 break;
142
143 i++;
144 }
145
d4ccb132 146 device_unlock(&dev->dev);
4d12b8b1
LRV		 147
148 cb->args[0] = i;
149
150 return skb->len;
151}
152
153static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
154{
155 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
156
4d12b8b1
LRV		 157 if (dev)
158 nfc_put_device(dev);
159
160 return 0;
161}
162
163int nfc_genl_targets_found(struct nfc_dev *dev)
164{
165 struct sk_buff *msg;
166 void *hdr;
167
15e47304 168 dev->genl_data.poll_req_portid = 0;
4d12b8b1 169
58050fce 170 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
4d12b8b1
LRV		 171 if (!msg)
172 return -ENOMEM;
173
174 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
0a40acb2 175 NFC_EVENT_TARGETS_FOUND);
4d12b8b1
LRV		 176 if (!hdr)
177 goto free_msg;
178
1e6428d8
DM		 179 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
180 goto nla_put_failure;
4d12b8b1
LRV		 181
182 genlmsg_end(msg, hdr);
183
184 return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
185
186nla_put_failure:
187 genlmsg_cancel(msg, hdr);
188free_msg:
189 nlmsg_free(msg);
190 return -EMSGSIZE;
191}
192
8112a5c9
SO		 193int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
194{
195 struct sk_buff *msg;
196 void *hdr;
197
58050fce 198 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8112a5c9
SO		 199 if (!msg)
200 return -ENOMEM;
201
202 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
203 NFC_EVENT_TARGET_LOST);
204 if (!hdr)
205 goto free_msg;
206
59ef43e6
JL		 207 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
208 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
209 goto nla_put_failure;
8112a5c9
SO		 210
211 genlmsg_end(msg, hdr);
212
213 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
214
215 return 0;
216
fc40a8c1
SO		 217nla_put_failure:
218 genlmsg_cancel(msg, hdr);
219free_msg:
220 nlmsg_free(msg);
221 return -EMSGSIZE;
222}
223
224int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
225{
226 struct sk_buff *msg;
227 void *hdr;
228
58050fce 229 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
fc40a8c1
SO		 230 if (!msg)
231 return -ENOMEM;
232
233 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
234 NFC_EVENT_TM_ACTIVATED);
235 if (!hdr)
236 goto free_msg;
237
238 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
239 goto nla_put_failure;
240 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
241 goto nla_put_failure;
242
243 genlmsg_end(msg, hdr);
244
245 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
246
247 return 0;
248
249nla_put_failure:
250 genlmsg_cancel(msg, hdr);
251free_msg:
252 nlmsg_free(msg);
253 return -EMSGSIZE;
254}
255
256int nfc_genl_tm_deactivated(struct nfc_dev *dev)
257{
258 struct sk_buff *msg;
259 void *hdr;
260
58050fce 261 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
fc40a8c1
SO		 262 if (!msg)
263 return -ENOMEM;
264
265 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
266 NFC_EVENT_TM_DEACTIVATED);
267 if (!hdr)
268 goto free_msg;
269
270 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
271 goto nla_put_failure;
272
273 genlmsg_end(msg, hdr);
274
275 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
276
277 return 0;
278
8112a5c9
SO		 279nla_put_failure:
280 genlmsg_cancel(msg, hdr);
281free_msg:
282 nlmsg_free(msg);
283 return -EMSGSIZE;
284}
285
4d12b8b1
LRV		 286int nfc_genl_device_added(struct nfc_dev *dev)
287{
288 struct sk_buff *msg;
289 void *hdr;
290
58050fce 291 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4d12b8b1
LRV		 292 if (!msg)
293 return -ENOMEM;
294
295 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
0a40acb2 296 NFC_EVENT_DEVICE_ADDED);
4d12b8b1
LRV		 297 if (!hdr)
298 goto free_msg;
299
1e6428d8
DM		 300 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
301 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
302 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
303 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
304 goto nla_put_failure;
4d12b8b1
LRV		 305
306 genlmsg_end(msg, hdr);
307
308 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
309
310 return 0;
311
312nla_put_failure:
313 genlmsg_cancel(msg, hdr);
314free_msg:
315 nlmsg_free(msg);
316 return -EMSGSIZE;
317}
318
319int nfc_genl_device_removed(struct nfc_dev *dev)
320{
321 struct sk_buff *msg;
322 void *hdr;
323
58050fce 324 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4d12b8b1
LRV		 325 if (!msg)
326 return -ENOMEM;
327
328 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
0a40acb2 329 NFC_EVENT_DEVICE_REMOVED);
4d12b8b1
LRV		 330 if (!hdr)
331 goto free_msg;
332
1e6428d8
DM		 333 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
334 goto nla_put_failure;
4d12b8b1
LRV		 335
336 genlmsg_end(msg, hdr);
337
338 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
339
340 return 0;
341
342nla_put_failure:
343 genlmsg_cancel(msg, hdr);
344free_msg:
345 nlmsg_free(msg);
346 return -EMSGSIZE;
347}
348
349static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
15e47304 350 u32 portid, u32 seq,
0a40acb2
SO		 351 struct netlink_callback *cb,
352 int flags)
4d12b8b1
LRV		 353{
354 void *hdr;
355
15e47304 356 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
0a40acb2 357 NFC_CMD_GET_DEVICE);
4d12b8b1
LRV		 358 if (!hdr)
359 return -EMSGSIZE;
360
361 if (cb)
362 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
363
1e6428d8
DM		 364 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
365 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
366 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
367 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
368 goto nla_put_failure;
4d12b8b1
LRV		 369
370 return genlmsg_end(msg, hdr);
371
372nla_put_failure:
373 genlmsg_cancel(msg, hdr);
374 return -EMSGSIZE;
375}
376
377static int nfc_genl_dump_devices(struct sk_buff *skb,
0a40acb2 378 struct netlink_callback *cb)
4d12b8b1
LRV		 379{
380 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
381 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
382 bool first_call = false;
383
4d12b8b1
LRV		 384 if (!iter) {
385 first_call = true;
386 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
387 if (!iter)
388 return -ENOMEM;
389 cb->args[0] = (long) iter;
390 }
391
392 mutex_lock(&nfc_devlist_mutex);
393
394 cb->seq = nfc_devlist_generation;
395
396 if (first_call) {
397 nfc_device_iter_init(iter);
398 dev = nfc_device_iter_next(iter);
399 }
400
401 while (dev) {
402 int rc;
403
15e47304 404 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
0a40acb2 405 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
4d12b8b1
LRV		 406 if (rc < 0)
407 break;
408
409 dev = nfc_device_iter_next(iter);
410 }
411
412 mutex_unlock(&nfc_devlist_mutex);
413
414 cb->args[1] = (long) dev;
415
416 return skb->len;
417}
418
419static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
420{
421 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
422
4d12b8b1
LRV		 423 nfc_device_iter_exit(iter);
424 kfree(iter);
425
426 return 0;
427}
428
1ed28f61 429int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
0a40acb2 430 u8 comm_mode, u8 rf_mode)
1ed28f61
SO		 431{
432 struct sk_buff *msg;
433 void *hdr;
434
435 pr_debug("DEP link is up\n");
436
58050fce 437 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1ed28f61
SO		 438 if (!msg)
439 return -ENOMEM;
440
0a40acb2 441 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
1ed28f61
SO		 442 if (!hdr)
443 goto free_msg;
444
1e6428d8
DM		 445 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
446 goto nla_put_failure;
447 if (rf_mode == NFC_RF_INITIATOR &&
448 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
449 goto nla_put_failure;
450 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
451 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
452 goto nla_put_failure;
1ed28f61
SO		 453
454 genlmsg_end(msg, hdr);
455
456 dev->dep_link_up = true;
457
458 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
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_dep_link_down_event(struct nfc_dev *dev)
470{
471 struct sk_buff *msg;
472 void *hdr;
473
474 pr_debug("DEP link is down\n");
475
58050fce 476 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1ed28f61
SO		 477 if (!msg)
478 return -ENOMEM;
479
480 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
0a40acb2 481 NFC_CMD_DEP_LINK_DOWN);
1ed28f61
SO		 482 if (!hdr)
483 goto free_msg;
484
1e6428d8
DM		 485 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
486 goto nla_put_failure;
1ed28f61
SO		 487
488 genlmsg_end(msg, hdr);
489
490 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
491
492 return 0;
493
494nla_put_failure:
495 genlmsg_cancel(msg, hdr);
496free_msg:
497 nlmsg_free(msg);
498 return -EMSGSIZE;
499}
500
4d12b8b1
LRV		 501static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
502{
503 struct sk_buff *msg;
504 struct nfc_dev *dev;
505 u32 idx;
506 int rc = -ENOBUFS;
507
4d12b8b1
LRV		 508 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
509 return -EINVAL;
510
511 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
512
513 dev = nfc_get_device(idx);
514 if (!dev)
515 return -ENODEV;
516
58050fce 517 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4d12b8b1
LRV		 518 if (!msg) {
519 rc = -ENOMEM;
520 goto out_putdev;
521 }
522
15e47304 523 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
0a40acb2 524 NULL, 0);
4d12b8b1
LRV		 525 if (rc < 0)
526 goto out_free;
527
528 nfc_put_device(dev);
529
530 return genlmsg_reply(msg, info);
531
532out_free:
533 nlmsg_free(msg);
534out_putdev:
535 nfc_put_device(dev);
536 return rc;
537}
538
8b3fe7b5
IE		 539static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
540{
541 struct nfc_dev *dev;
542 int rc;
543 u32 idx;
544
8b3fe7b5
IE		 545 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
546 return -EINVAL;
547
548 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
549
550 dev = nfc_get_device(idx);
551 if (!dev)
552 return -ENODEV;
553
554 rc = nfc_dev_up(dev);
555
556 nfc_put_device(dev);
557 return rc;
558}
559
560static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
561{
562 struct nfc_dev *dev;
563 int rc;
564 u32 idx;
565
8b3fe7b5
IE		 566 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
567 return -EINVAL;
568
569 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
570
571 dev = nfc_get_device(idx);
572 if (!dev)
573 return -ENODEV;
574
575 rc = nfc_dev_down(dev);
576
577 nfc_put_device(dev);
578 return rc;
579}
580
4d12b8b1
LRV		 581static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
582{
583 struct nfc_dev *dev;
584 int rc;
585 u32 idx;
fe7c5800 586 u32 im_protocols = 0, tm_protocols = 0;
4d12b8b1 587
1ed28f61
SO		 588 pr_debug("Poll start\n");
589
4d12b8b1 590 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
fe7c5800
SO		 591 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
592 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
593 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
4d12b8b1
LRV		 594 return -EINVAL;
595
596 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
fe7c5800
SO		 597
598 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
599 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
fe7c5800
SO		 600
601 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
602 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
5e50ee3a
SO		 603 else if (info->attrs[NFC_ATTR_PROTOCOLS])
604 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
4d12b8b1
LRV		 605
606 dev = nfc_get_device(idx);
607 if (!dev)
608 return -ENODEV;
609
610 mutex_lock(&dev->genl_data.genl_data_mutex);
611
fe7c5800 612 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
4d12b8b1 613 if (!rc)
15e47304 614 dev->genl_data.poll_req_portid = info->snd_portid;
4d12b8b1
LRV		 615
616 mutex_unlock(&dev->genl_data.genl_data_mutex);
617
618 nfc_put_device(dev);
619 return rc;
620}
621
622static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
623{
624 struct nfc_dev *dev;
625 int rc;
626 u32 idx;
627
4d12b8b1
LRV		 628 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
629 return -EINVAL;
630
631 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
632
633 dev = nfc_get_device(idx);
634 if (!dev)
635 return -ENODEV;
636
a831b913
SO		 637 device_lock(&dev->dev);
638
639 if (!dev->polling) {
640 device_unlock(&dev->dev);
641 return -EINVAL;
642 }
643
644 device_unlock(&dev->dev);
645
4d12b8b1
LRV		 646 mutex_lock(&dev->genl_data.genl_data_mutex);
647
15e47304 648 if (dev->genl_data.poll_req_portid != info->snd_portid) {
4d12b8b1
LRV		 649 rc = -EBUSY;
650 goto out;
651 }
652
653 rc = nfc_stop_poll(dev);
15e47304 654 dev->genl_data.poll_req_portid = 0;
4d12b8b1
LRV		 655
656out:
657 mutex_unlock(&dev->genl_data.genl_data_mutex);
658 nfc_put_device(dev);
659 return rc;
660}
661
1ed28f61
SO		 662static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
663{
664 struct nfc_dev *dev;
665 int rc, tgt_idx;
666 u32 idx;
47807d3d 667 u8 comm;
1ed28f61
SO		 668
669 pr_debug("DEP link up\n");
670
671 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
47807d3d 672 !info->attrs[NFC_ATTR_COMM_MODE])
1ed28f61
SO		 673 return -EINVAL;
674
675 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
676 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
677 tgt_idx = NFC_TARGET_IDX_ANY;
678 else
679 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
680
681 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
1ed28f61
SO		 682
683 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
684 return -EINVAL;
685
1ed28f61
SO		 686 dev = nfc_get_device(idx);
687 if (!dev)
688 return -ENODEV;
689
47807d3d 690 rc = nfc_dep_link_up(dev, tgt_idx, comm);
1ed28f61
SO		 691
692 nfc_put_device(dev);
693
694 return rc;
695}
696
697static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
698{
699 struct nfc_dev *dev;
700 int rc;
701 u32 idx;
702
703 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
704 return -EINVAL;
705
706 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
707
708 dev = nfc_get_device(idx);
709 if (!dev)
710 return -ENODEV;
711
712 rc = nfc_dep_link_down(dev);
713
714 nfc_put_device(dev);
715 return rc;
716}
717
4d12b8b1
LRV		 718static struct genl_ops nfc_genl_ops[] = {
719 {
720 .cmd = NFC_CMD_GET_DEVICE,
721 .doit = nfc_genl_get_device,
722 .dumpit = nfc_genl_dump_devices,
723 .done = nfc_genl_dump_devices_done,
724 .policy = nfc_genl_policy,
8b3fe7b5
IE		 725 },
726 {
727 .cmd = NFC_CMD_DEV_UP,
728 .doit = nfc_genl_dev_up,
729 .policy = nfc_genl_policy,
730 },
731 {
732 .cmd = NFC_CMD_DEV_DOWN,
733 .doit = nfc_genl_dev_down,
734 .policy = nfc_genl_policy,
4d12b8b1
LRV		 735 },
736 {
737 .cmd = NFC_CMD_START_POLL,
738 .doit = nfc_genl_start_poll,
739 .policy = nfc_genl_policy,
740 },
741 {
742 .cmd = NFC_CMD_STOP_POLL,
743 .doit = nfc_genl_stop_poll,
744 .policy = nfc_genl_policy,
745 },
1ed28f61
SO		 746 {
747 .cmd = NFC_CMD_DEP_LINK_UP,
748 .doit = nfc_genl_dep_link_up,
749 .policy = nfc_genl_policy,
750 },
751 {
752 .cmd = NFC_CMD_DEP_LINK_DOWN,
753 .doit = nfc_genl_dep_link_down,
754 .policy = nfc_genl_policy,
755 },
4d12b8b1
LRV		 756 {
757 .cmd = NFC_CMD_GET_TARGET,
758 .dumpit = nfc_genl_dump_targets,
759 .done = nfc_genl_dump_targets_done,
760 .policy = nfc_genl_policy,
761 },
762};
763
764static int nfc_genl_rcv_nl_event(struct notifier_block *this,
0a40acb2 765 unsigned long event, void *ptr)
4d12b8b1
LRV		 766{
767 struct netlink_notify *n = ptr;
768 struct class_dev_iter iter;
769 struct nfc_dev *dev;
770
771 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
772 goto out;
773
15e47304 774 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
4d12b8b1
LRV		 775
776 nfc_device_iter_init(&iter);
777 dev = nfc_device_iter_next(&iter);
778
779 while (dev) {
15e47304 780 if (dev->genl_data.poll_req_portid == n->portid) {
4d12b8b1 781 nfc_stop_poll(dev);
15e47304 782 dev->genl_data.poll_req_portid = 0;
4d12b8b1 783 }
4d12b8b1
LRV		 784 dev = nfc_device_iter_next(&iter);
785 }
786
787 nfc_device_iter_exit(&iter);
788
789out:
790 return NOTIFY_DONE;
791}
792
793void nfc_genl_data_init(struct nfc_genl_data *genl_data)
794{
15e47304 795 genl_data->poll_req_portid = 0;
4d12b8b1
LRV		 796 mutex_init(&genl_data->genl_data_mutex);
797}
798
799void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
800{
801 mutex_destroy(&genl_data->genl_data_mutex);
802}
803
804static struct notifier_block nl_notifier = {
805 .notifier_call = nfc_genl_rcv_nl_event,
806};
807
808/**
809 * nfc_genl_init() - Initialize netlink interface
810 *
811 * This initialization function registers the nfc netlink family.
812 */
813int __init nfc_genl_init(void)
814{
815 int rc;
816
817 rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops,
0a40acb2 818 ARRAY_SIZE(nfc_genl_ops));
4d12b8b1
LRV		 819 if (rc)
820 return rc;
821
822 rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp);
823
824 netlink_register_notifier(&nl_notifier);
825
826 return rc;
827}
828
829/**
830 * nfc_genl_exit() - Deinitialize netlink interface
831 *
832 * This exit function unregisters the nfc netlink family.
833 */
834void nfc_genl_exit(void)
835{
836 netlink_unregister_notifier(&nl_notifier);
837 genl_unregister_family(&nfc_genl_family);
838}
kernel source for telekom puls (alcatel/mediatek)