Commit | Line | Data |
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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 | ||
32 | static struct genl_multicast_group nfc_genl_event_mcgrp = { | |
33 | .name = NFC_GENL_MCAST_EVENT_NAME, | |
34 | }; | |
35 | ||
36 | struct genl_family nfc_genl_family = { | |
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 | ||
44 | static 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 }, |
4d12b8b1 LRV |
52 | }; |
53 | ||
54 | static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target, | |
55 | struct netlink_callback *cb, int flags) | |
56 | { | |
57 | void *hdr; | |
58 | ||
4d12b8b1 LRV |
59 | hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, |
60 | &nfc_genl_family, flags, NFC_CMD_GET_TARGET); | |
61 | if (!hdr) | |
62 | return -EMSGSIZE; | |
63 | ||
64 | genl_dump_check_consistent(cb, hdr, &nfc_genl_family); | |
65 | ||
66 | NLA_PUT_U32(msg, NFC_ATTR_TARGET_INDEX, target->idx); | |
67 | NLA_PUT_U32(msg, NFC_ATTR_PROTOCOLS, | |
68 | target->supported_protocols); | |
69 | NLA_PUT_U16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res); | |
70 | NLA_PUT_U8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res); | |
288e0713 IE |
71 | if (target->nfcid1_len > 0) |
72 | NLA_PUT(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len, | |
73 | target->nfcid1); | |
d5a2ca60 IE |
74 | if (target->sensb_res_len > 0) |
75 | NLA_PUT(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len, | |
76 | target->sensb_res); | |
77 | if (target->sensf_res_len > 0) | |
78 | NLA_PUT(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len, | |
79 | target->sensf_res); | |
4d12b8b1 LRV |
80 | |
81 | return genlmsg_end(msg, hdr); | |
82 | ||
83 | nla_put_failure: | |
84 | genlmsg_cancel(msg, hdr); | |
85 | return -EMSGSIZE; | |
86 | } | |
87 | ||
88 | static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb) | |
89 | { | |
90 | struct nfc_dev *dev; | |
91 | int rc; | |
92 | u32 idx; | |
93 | ||
94 | rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize, | |
95 | nfc_genl_family.attrbuf, | |
96 | nfc_genl_family.maxattr, | |
97 | nfc_genl_policy); | |
98 | if (rc < 0) | |
99 | return ERR_PTR(rc); | |
100 | ||
101 | if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]) | |
102 | return ERR_PTR(-EINVAL); | |
103 | ||
104 | idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]); | |
105 | ||
106 | dev = nfc_get_device(idx); | |
107 | if (!dev) | |
108 | return ERR_PTR(-ENODEV); | |
109 | ||
110 | return dev; | |
111 | } | |
112 | ||
113 | static int nfc_genl_dump_targets(struct sk_buff *skb, | |
114 | struct netlink_callback *cb) | |
115 | { | |
116 | int i = cb->args[0]; | |
117 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
118 | int rc; | |
119 | ||
4d12b8b1 LRV |
120 | if (!dev) { |
121 | dev = __get_device_from_cb(cb); | |
122 | if (IS_ERR(dev)) | |
123 | return PTR_ERR(dev); | |
124 | ||
125 | cb->args[1] = (long) dev; | |
126 | } | |
127 | ||
128 | spin_lock_bh(&dev->targets_lock); | |
129 | ||
130 | cb->seq = dev->targets_generation; | |
131 | ||
132 | while (i < dev->n_targets) { | |
133 | rc = nfc_genl_send_target(skb, &dev->targets[i], cb, | |
134 | NLM_F_MULTI); | |
135 | if (rc < 0) | |
136 | break; | |
137 | ||
138 | i++; | |
139 | } | |
140 | ||
141 | spin_unlock_bh(&dev->targets_lock); | |
142 | ||
143 | cb->args[0] = i; | |
144 | ||
145 | return skb->len; | |
146 | } | |
147 | ||
148 | static int nfc_genl_dump_targets_done(struct netlink_callback *cb) | |
149 | { | |
150 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
151 | ||
4d12b8b1 LRV |
152 | if (dev) |
153 | nfc_put_device(dev); | |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
158 | int nfc_genl_targets_found(struct nfc_dev *dev) | |
159 | { | |
160 | struct sk_buff *msg; | |
161 | void *hdr; | |
162 | ||
4d12b8b1 LRV |
163 | dev->genl_data.poll_req_pid = 0; |
164 | ||
165 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
166 | if (!msg) | |
167 | return -ENOMEM; | |
168 | ||
169 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
170 | NFC_EVENT_TARGETS_FOUND); | |
171 | if (!hdr) | |
172 | goto free_msg; | |
173 | ||
174 | NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx); | |
175 | ||
176 | genlmsg_end(msg, hdr); | |
177 | ||
178 | return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
179 | ||
180 | nla_put_failure: | |
181 | genlmsg_cancel(msg, hdr); | |
182 | free_msg: | |
183 | nlmsg_free(msg); | |
184 | return -EMSGSIZE; | |
185 | } | |
186 | ||
187 | int nfc_genl_device_added(struct nfc_dev *dev) | |
188 | { | |
189 | struct sk_buff *msg; | |
190 | void *hdr; | |
191 | ||
4d12b8b1 LRV |
192 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
193 | if (!msg) | |
194 | return -ENOMEM; | |
195 | ||
196 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
197 | NFC_EVENT_DEVICE_ADDED); | |
198 | if (!hdr) | |
199 | goto free_msg; | |
200 | ||
201 | NLA_PUT_STRING(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)); | |
202 | NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx); | |
203 | NLA_PUT_U32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols); | |
c970a1ac | 204 | NLA_PUT_U8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up); |
4d12b8b1 LRV |
205 | |
206 | genlmsg_end(msg, hdr); | |
207 | ||
208 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
209 | ||
210 | return 0; | |
211 | ||
212 | nla_put_failure: | |
213 | genlmsg_cancel(msg, hdr); | |
214 | free_msg: | |
215 | nlmsg_free(msg); | |
216 | return -EMSGSIZE; | |
217 | } | |
218 | ||
219 | int nfc_genl_device_removed(struct nfc_dev *dev) | |
220 | { | |
221 | struct sk_buff *msg; | |
222 | void *hdr; | |
223 | ||
4d12b8b1 LRV |
224 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
225 | if (!msg) | |
226 | return -ENOMEM; | |
227 | ||
228 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
229 | NFC_EVENT_DEVICE_REMOVED); | |
230 | if (!hdr) | |
231 | goto free_msg; | |
232 | ||
233 | NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx); | |
234 | ||
235 | genlmsg_end(msg, hdr); | |
236 | ||
237 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
238 | ||
239 | return 0; | |
240 | ||
241 | nla_put_failure: | |
242 | genlmsg_cancel(msg, hdr); | |
243 | free_msg: | |
244 | nlmsg_free(msg); | |
245 | return -EMSGSIZE; | |
246 | } | |
247 | ||
248 | static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev, | |
249 | u32 pid, u32 seq, | |
250 | struct netlink_callback *cb, | |
251 | int flags) | |
252 | { | |
253 | void *hdr; | |
254 | ||
4d12b8b1 LRV |
255 | hdr = genlmsg_put(msg, pid, seq, &nfc_genl_family, flags, |
256 | NFC_CMD_GET_DEVICE); | |
257 | if (!hdr) | |
258 | return -EMSGSIZE; | |
259 | ||
260 | if (cb) | |
261 | genl_dump_check_consistent(cb, hdr, &nfc_genl_family); | |
262 | ||
263 | NLA_PUT_STRING(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)); | |
264 | NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx); | |
265 | NLA_PUT_U32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols); | |
c970a1ac | 266 | NLA_PUT_U8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up); |
4d12b8b1 LRV |
267 | |
268 | return genlmsg_end(msg, hdr); | |
269 | ||
270 | nla_put_failure: | |
271 | genlmsg_cancel(msg, hdr); | |
272 | return -EMSGSIZE; | |
273 | } | |
274 | ||
275 | static int nfc_genl_dump_devices(struct sk_buff *skb, | |
276 | struct netlink_callback *cb) | |
277 | { | |
278 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
279 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
280 | bool first_call = false; | |
281 | ||
4d12b8b1 LRV |
282 | if (!iter) { |
283 | first_call = true; | |
284 | iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL); | |
285 | if (!iter) | |
286 | return -ENOMEM; | |
287 | cb->args[0] = (long) iter; | |
288 | } | |
289 | ||
290 | mutex_lock(&nfc_devlist_mutex); | |
291 | ||
292 | cb->seq = nfc_devlist_generation; | |
293 | ||
294 | if (first_call) { | |
295 | nfc_device_iter_init(iter); | |
296 | dev = nfc_device_iter_next(iter); | |
297 | } | |
298 | ||
299 | while (dev) { | |
300 | int rc; | |
301 | ||
302 | rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).pid, | |
303 | cb->nlh->nlmsg_seq, | |
304 | cb, NLM_F_MULTI); | |
305 | if (rc < 0) | |
306 | break; | |
307 | ||
308 | dev = nfc_device_iter_next(iter); | |
309 | } | |
310 | ||
311 | mutex_unlock(&nfc_devlist_mutex); | |
312 | ||
313 | cb->args[1] = (long) dev; | |
314 | ||
315 | return skb->len; | |
316 | } | |
317 | ||
318 | static int nfc_genl_dump_devices_done(struct netlink_callback *cb) | |
319 | { | |
320 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
321 | ||
4d12b8b1 LRV |
322 | nfc_device_iter_exit(iter); |
323 | kfree(iter); | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
1ed28f61 SO |
328 | int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx, |
329 | u8 comm_mode, u8 rf_mode) | |
330 | { | |
331 | struct sk_buff *msg; | |
332 | void *hdr; | |
333 | ||
334 | pr_debug("DEP link is up\n"); | |
335 | ||
336 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
337 | if (!msg) | |
338 | return -ENOMEM; | |
339 | ||
340 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
341 | NFC_CMD_DEP_LINK_UP); | |
342 | if (!hdr) | |
343 | goto free_msg; | |
344 | ||
345 | NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx); | |
346 | if (rf_mode == NFC_RF_INITIATOR) | |
347 | NLA_PUT_U32(msg, NFC_ATTR_TARGET_INDEX, target_idx); | |
348 | NLA_PUT_U8(msg, NFC_ATTR_COMM_MODE, comm_mode); | |
349 | NLA_PUT_U8(msg, NFC_ATTR_RF_MODE, rf_mode); | |
350 | ||
351 | genlmsg_end(msg, hdr); | |
352 | ||
353 | dev->dep_link_up = true; | |
354 | ||
355 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
356 | ||
357 | return 0; | |
358 | ||
359 | nla_put_failure: | |
360 | genlmsg_cancel(msg, hdr); | |
361 | free_msg: | |
362 | nlmsg_free(msg); | |
363 | return -EMSGSIZE; | |
364 | } | |
365 | ||
366 | int nfc_genl_dep_link_down_event(struct nfc_dev *dev) | |
367 | { | |
368 | struct sk_buff *msg; | |
369 | void *hdr; | |
370 | ||
371 | pr_debug("DEP link is down\n"); | |
372 | ||
373 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
374 | if (!msg) | |
375 | return -ENOMEM; | |
376 | ||
377 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
378 | NFC_CMD_DEP_LINK_DOWN); | |
379 | if (!hdr) | |
380 | goto free_msg; | |
381 | ||
382 | NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx); | |
383 | ||
384 | genlmsg_end(msg, hdr); | |
385 | ||
386 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
387 | ||
388 | return 0; | |
389 | ||
390 | nla_put_failure: | |
391 | genlmsg_cancel(msg, hdr); | |
392 | free_msg: | |
393 | nlmsg_free(msg); | |
394 | return -EMSGSIZE; | |
395 | } | |
396 | ||
4d12b8b1 LRV |
397 | static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info) |
398 | { | |
399 | struct sk_buff *msg; | |
400 | struct nfc_dev *dev; | |
401 | u32 idx; | |
402 | int rc = -ENOBUFS; | |
403 | ||
4d12b8b1 LRV |
404 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
405 | return -EINVAL; | |
406 | ||
407 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
408 | ||
409 | dev = nfc_get_device(idx); | |
410 | if (!dev) | |
411 | return -ENODEV; | |
412 | ||
413 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
414 | if (!msg) { | |
415 | rc = -ENOMEM; | |
416 | goto out_putdev; | |
417 | } | |
418 | ||
419 | rc = nfc_genl_send_device(msg, dev, info->snd_pid, info->snd_seq, | |
420 | NULL, 0); | |
421 | if (rc < 0) | |
422 | goto out_free; | |
423 | ||
424 | nfc_put_device(dev); | |
425 | ||
426 | return genlmsg_reply(msg, info); | |
427 | ||
428 | out_free: | |
429 | nlmsg_free(msg); | |
430 | out_putdev: | |
431 | nfc_put_device(dev); | |
432 | return rc; | |
433 | } | |
434 | ||
8b3fe7b5 IE |
435 | static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info) |
436 | { | |
437 | struct nfc_dev *dev; | |
438 | int rc; | |
439 | u32 idx; | |
440 | ||
8b3fe7b5 IE |
441 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
442 | return -EINVAL; | |
443 | ||
444 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
445 | ||
446 | dev = nfc_get_device(idx); | |
447 | if (!dev) | |
448 | return -ENODEV; | |
449 | ||
450 | rc = nfc_dev_up(dev); | |
451 | ||
452 | nfc_put_device(dev); | |
453 | return rc; | |
454 | } | |
455 | ||
456 | static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info) | |
457 | { | |
458 | struct nfc_dev *dev; | |
459 | int rc; | |
460 | u32 idx; | |
461 | ||
8b3fe7b5 IE |
462 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
463 | return -EINVAL; | |
464 | ||
465 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
466 | ||
467 | dev = nfc_get_device(idx); | |
468 | if (!dev) | |
469 | return -ENODEV; | |
470 | ||
471 | rc = nfc_dev_down(dev); | |
472 | ||
473 | nfc_put_device(dev); | |
474 | return rc; | |
475 | } | |
476 | ||
4d12b8b1 LRV |
477 | static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info) |
478 | { | |
479 | struct nfc_dev *dev; | |
480 | int rc; | |
481 | u32 idx; | |
482 | u32 protocols; | |
483 | ||
1ed28f61 SO |
484 | pr_debug("Poll start\n"); |
485 | ||
4d12b8b1 LRV |
486 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
487 | !info->attrs[NFC_ATTR_PROTOCOLS]) | |
488 | return -EINVAL; | |
489 | ||
490 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
491 | protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); | |
492 | ||
493 | dev = nfc_get_device(idx); | |
494 | if (!dev) | |
495 | return -ENODEV; | |
496 | ||
497 | mutex_lock(&dev->genl_data.genl_data_mutex); | |
498 | ||
499 | rc = nfc_start_poll(dev, protocols); | |
500 | if (!rc) | |
501 | dev->genl_data.poll_req_pid = info->snd_pid; | |
502 | ||
503 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
504 | ||
505 | nfc_put_device(dev); | |
506 | return rc; | |
507 | } | |
508 | ||
509 | static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info) | |
510 | { | |
511 | struct nfc_dev *dev; | |
512 | int rc; | |
513 | u32 idx; | |
514 | ||
4d12b8b1 LRV |
515 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
516 | return -EINVAL; | |
517 | ||
518 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
519 | ||
520 | dev = nfc_get_device(idx); | |
521 | if (!dev) | |
522 | return -ENODEV; | |
523 | ||
524 | mutex_lock(&dev->genl_data.genl_data_mutex); | |
525 | ||
526 | if (dev->genl_data.poll_req_pid != info->snd_pid) { | |
527 | rc = -EBUSY; | |
528 | goto out; | |
529 | } | |
530 | ||
531 | rc = nfc_stop_poll(dev); | |
532 | dev->genl_data.poll_req_pid = 0; | |
533 | ||
534 | out: | |
535 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
536 | nfc_put_device(dev); | |
537 | return rc; | |
538 | } | |
539 | ||
1ed28f61 SO |
540 | static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info) |
541 | { | |
542 | struct nfc_dev *dev; | |
543 | int rc, tgt_idx; | |
544 | u32 idx; | |
545 | u8 comm, rf; | |
546 | ||
547 | pr_debug("DEP link up\n"); | |
548 | ||
549 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
550 | !info->attrs[NFC_ATTR_COMM_MODE] || | |
551 | !info->attrs[NFC_ATTR_RF_MODE]) | |
552 | return -EINVAL; | |
553 | ||
554 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
555 | if (!info->attrs[NFC_ATTR_TARGET_INDEX]) | |
556 | tgt_idx = NFC_TARGET_IDX_ANY; | |
557 | else | |
558 | tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); | |
559 | ||
560 | comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]); | |
561 | rf = nla_get_u8(info->attrs[NFC_ATTR_RF_MODE]); | |
562 | ||
563 | if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE) | |
564 | return -EINVAL; | |
565 | ||
566 | if (rf != NFC_RF_INITIATOR && comm != NFC_RF_TARGET) | |
567 | return -EINVAL; | |
568 | ||
569 | dev = nfc_get_device(idx); | |
570 | if (!dev) | |
571 | return -ENODEV; | |
572 | ||
573 | rc = nfc_dep_link_up(dev, tgt_idx, comm, rf); | |
574 | ||
575 | nfc_put_device(dev); | |
576 | ||
577 | return rc; | |
578 | } | |
579 | ||
580 | static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) | |
581 | { | |
582 | struct nfc_dev *dev; | |
583 | int rc; | |
584 | u32 idx; | |
585 | ||
586 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) | |
587 | return -EINVAL; | |
588 | ||
589 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
590 | ||
591 | dev = nfc_get_device(idx); | |
592 | if (!dev) | |
593 | return -ENODEV; | |
594 | ||
595 | rc = nfc_dep_link_down(dev); | |
596 | ||
597 | nfc_put_device(dev); | |
598 | return rc; | |
599 | } | |
600 | ||
4d12b8b1 LRV |
601 | static struct genl_ops nfc_genl_ops[] = { |
602 | { | |
603 | .cmd = NFC_CMD_GET_DEVICE, | |
604 | .doit = nfc_genl_get_device, | |
605 | .dumpit = nfc_genl_dump_devices, | |
606 | .done = nfc_genl_dump_devices_done, | |
607 | .policy = nfc_genl_policy, | |
8b3fe7b5 IE |
608 | }, |
609 | { | |
610 | .cmd = NFC_CMD_DEV_UP, | |
611 | .doit = nfc_genl_dev_up, | |
612 | .policy = nfc_genl_policy, | |
613 | }, | |
614 | { | |
615 | .cmd = NFC_CMD_DEV_DOWN, | |
616 | .doit = nfc_genl_dev_down, | |
617 | .policy = nfc_genl_policy, | |
4d12b8b1 LRV |
618 | }, |
619 | { | |
620 | .cmd = NFC_CMD_START_POLL, | |
621 | .doit = nfc_genl_start_poll, | |
622 | .policy = nfc_genl_policy, | |
623 | }, | |
624 | { | |
625 | .cmd = NFC_CMD_STOP_POLL, | |
626 | .doit = nfc_genl_stop_poll, | |
627 | .policy = nfc_genl_policy, | |
628 | }, | |
1ed28f61 SO |
629 | { |
630 | .cmd = NFC_CMD_DEP_LINK_UP, | |
631 | .doit = nfc_genl_dep_link_up, | |
632 | .policy = nfc_genl_policy, | |
633 | }, | |
634 | { | |
635 | .cmd = NFC_CMD_DEP_LINK_DOWN, | |
636 | .doit = nfc_genl_dep_link_down, | |
637 | .policy = nfc_genl_policy, | |
638 | }, | |
4d12b8b1 LRV |
639 | { |
640 | .cmd = NFC_CMD_GET_TARGET, | |
641 | .dumpit = nfc_genl_dump_targets, | |
642 | .done = nfc_genl_dump_targets_done, | |
643 | .policy = nfc_genl_policy, | |
644 | }, | |
645 | }; | |
646 | ||
647 | static int nfc_genl_rcv_nl_event(struct notifier_block *this, | |
648 | unsigned long event, void *ptr) | |
649 | { | |
650 | struct netlink_notify *n = ptr; | |
651 | struct class_dev_iter iter; | |
652 | struct nfc_dev *dev; | |
653 | ||
654 | if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC) | |
655 | goto out; | |
656 | ||
20c239c1 | 657 | pr_debug("NETLINK_URELEASE event from id %d\n", n->pid); |
4d12b8b1 LRV |
658 | |
659 | nfc_device_iter_init(&iter); | |
660 | dev = nfc_device_iter_next(&iter); | |
661 | ||
662 | while (dev) { | |
4d12b8b1 LRV |
663 | if (dev->genl_data.poll_req_pid == n->pid) { |
664 | nfc_stop_poll(dev); | |
665 | dev->genl_data.poll_req_pid = 0; | |
666 | } | |
4d12b8b1 LRV |
667 | dev = nfc_device_iter_next(&iter); |
668 | } | |
669 | ||
670 | nfc_device_iter_exit(&iter); | |
671 | ||
672 | out: | |
673 | return NOTIFY_DONE; | |
674 | } | |
675 | ||
676 | void nfc_genl_data_init(struct nfc_genl_data *genl_data) | |
677 | { | |
678 | genl_data->poll_req_pid = 0; | |
679 | mutex_init(&genl_data->genl_data_mutex); | |
680 | } | |
681 | ||
682 | void nfc_genl_data_exit(struct nfc_genl_data *genl_data) | |
683 | { | |
684 | mutex_destroy(&genl_data->genl_data_mutex); | |
685 | } | |
686 | ||
687 | static struct notifier_block nl_notifier = { | |
688 | .notifier_call = nfc_genl_rcv_nl_event, | |
689 | }; | |
690 | ||
691 | /** | |
692 | * nfc_genl_init() - Initialize netlink interface | |
693 | * | |
694 | * This initialization function registers the nfc netlink family. | |
695 | */ | |
696 | int __init nfc_genl_init(void) | |
697 | { | |
698 | int rc; | |
699 | ||
700 | rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops, | |
701 | ARRAY_SIZE(nfc_genl_ops)); | |
702 | if (rc) | |
703 | return rc; | |
704 | ||
705 | rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp); | |
706 | ||
707 | netlink_register_notifier(&nl_notifier); | |
708 | ||
709 | return rc; | |
710 | } | |
711 | ||
712 | /** | |
713 | * nfc_genl_exit() - Deinitialize netlink interface | |
714 | * | |
715 | * This exit function unregisters the nfc netlink family. | |
716 | */ | |
717 | void nfc_genl_exit(void) | |
718 | { | |
719 | netlink_unregister_notifier(&nl_notifier); | |
720 | genl_unregister_family(&nfc_genl_family); | |
721 | } |