Commit | Line | Data |
---|---|---|
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 | ||
e5fe4cf8 | 36 | static 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 | ||
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, | |
0a40acb2 | 55 | struct netlink_callback *cb, int flags) |
4d12b8b1 LRV |
56 | { |
57 | void *hdr; | |
58 | ||
4d12b8b1 | 59 | hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, |
0a40acb2 | 60 | &nfc_genl_family, flags, NFC_CMD_GET_TARGET); |
4d12b8b1 LRV |
61 | if (!hdr) |
62 | return -EMSGSIZE; | |
63 | ||
64 | genl_dump_check_consistent(cb, hdr, &nfc_genl_family); | |
65 | ||
1e6428d8 DM |
66 | if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) || |
67 | nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) || | |
68 | nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) || | |
69 | nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res)) | |
70 | goto nla_put_failure; | |
71 | if (target->nfcid1_len > 0 && | |
72 | nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len, | |
73 | target->nfcid1)) | |
74 | goto nla_put_failure; | |
75 | if (target->sensb_res_len > 0 && | |
76 | nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len, | |
77 | target->sensb_res)) | |
78 | goto nla_put_failure; | |
79 | if (target->sensf_res_len > 0 && | |
80 | nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len, | |
81 | target->sensf_res)) | |
82 | goto nla_put_failure; | |
4d12b8b1 LRV |
83 | |
84 | return genlmsg_end(msg, hdr); | |
85 | ||
86 | nla_put_failure: | |
87 | genlmsg_cancel(msg, hdr); | |
88 | return -EMSGSIZE; | |
89 | } | |
90 | ||
91 | static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb) | |
92 | { | |
93 | struct nfc_dev *dev; | |
94 | int rc; | |
95 | u32 idx; | |
96 | ||
97 | rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize, | |
0a40acb2 SO |
98 | nfc_genl_family.attrbuf, |
99 | nfc_genl_family.maxattr, | |
100 | nfc_genl_policy); | |
4d12b8b1 LRV |
101 | if (rc < 0) |
102 | return ERR_PTR(rc); | |
103 | ||
104 | if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]) | |
105 | return ERR_PTR(-EINVAL); | |
106 | ||
107 | idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]); | |
108 | ||
109 | dev = nfc_get_device(idx); | |
110 | if (!dev) | |
111 | return ERR_PTR(-ENODEV); | |
112 | ||
113 | return dev; | |
114 | } | |
115 | ||
116 | static int nfc_genl_dump_targets(struct sk_buff *skb, | |
0a40acb2 | 117 | struct netlink_callback *cb) |
4d12b8b1 LRV |
118 | { |
119 | int i = cb->args[0]; | |
120 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
121 | int rc; | |
122 | ||
4d12b8b1 LRV |
123 | if (!dev) { |
124 | dev = __get_device_from_cb(cb); | |
125 | if (IS_ERR(dev)) | |
126 | return PTR_ERR(dev); | |
127 | ||
128 | cb->args[1] = (long) dev; | |
129 | } | |
130 | ||
d4ccb132 | 131 | device_lock(&dev->dev); |
4d12b8b1 LRV |
132 | |
133 | cb->seq = dev->targets_generation; | |
134 | ||
135 | while (i < dev->n_targets) { | |
136 | rc = nfc_genl_send_target(skb, &dev->targets[i], cb, | |
0a40acb2 | 137 | NLM_F_MULTI); |
4d12b8b1 LRV |
138 | if (rc < 0) |
139 | break; | |
140 | ||
141 | i++; | |
142 | } | |
143 | ||
d4ccb132 | 144 | device_unlock(&dev->dev); |
4d12b8b1 LRV |
145 | |
146 | cb->args[0] = i; | |
147 | ||
148 | return skb->len; | |
149 | } | |
150 | ||
151 | static int nfc_genl_dump_targets_done(struct netlink_callback *cb) | |
152 | { | |
153 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
154 | ||
4d12b8b1 LRV |
155 | if (dev) |
156 | nfc_put_device(dev); | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | int nfc_genl_targets_found(struct nfc_dev *dev) | |
162 | { | |
163 | struct sk_buff *msg; | |
164 | void *hdr; | |
165 | ||
4d12b8b1 LRV |
166 | dev->genl_data.poll_req_pid = 0; |
167 | ||
168 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
169 | if (!msg) | |
170 | return -ENOMEM; | |
171 | ||
172 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 173 | NFC_EVENT_TARGETS_FOUND); |
4d12b8b1 LRV |
174 | if (!hdr) |
175 | goto free_msg; | |
176 | ||
1e6428d8 DM |
177 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
178 | goto nla_put_failure; | |
4d12b8b1 LRV |
179 | |
180 | genlmsg_end(msg, hdr); | |
181 | ||
182 | return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
183 | ||
184 | nla_put_failure: | |
185 | genlmsg_cancel(msg, hdr); | |
186 | free_msg: | |
187 | nlmsg_free(msg); | |
188 | return -EMSGSIZE; | |
189 | } | |
190 | ||
8112a5c9 SO |
191 | int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx) |
192 | { | |
193 | struct sk_buff *msg; | |
194 | void *hdr; | |
195 | ||
196 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
197 | if (!msg) | |
198 | return -ENOMEM; | |
199 | ||
200 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
201 | NFC_EVENT_TARGET_LOST); | |
202 | if (!hdr) | |
203 | goto free_msg; | |
204 | ||
59ef43e6 JL |
205 | if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
206 | nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx)) | |
207 | goto nla_put_failure; | |
8112a5c9 SO |
208 | |
209 | genlmsg_end(msg, hdr); | |
210 | ||
211 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
212 | ||
213 | return 0; | |
214 | ||
215 | nla_put_failure: | |
216 | genlmsg_cancel(msg, hdr); | |
217 | free_msg: | |
218 | nlmsg_free(msg); | |
219 | return -EMSGSIZE; | |
220 | } | |
221 | ||
4d12b8b1 LRV |
222 | int nfc_genl_device_added(struct nfc_dev *dev) |
223 | { | |
224 | struct sk_buff *msg; | |
225 | void *hdr; | |
226 | ||
4d12b8b1 LRV |
227 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
228 | if (!msg) | |
229 | return -ENOMEM; | |
230 | ||
231 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 232 | NFC_EVENT_DEVICE_ADDED); |
4d12b8b1 LRV |
233 | if (!hdr) |
234 | goto free_msg; | |
235 | ||
1e6428d8 DM |
236 | if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
237 | nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || | |
238 | nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) || | |
239 | nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up)) | |
240 | goto nla_put_failure; | |
4d12b8b1 LRV |
241 | |
242 | genlmsg_end(msg, hdr); | |
243 | ||
244 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
245 | ||
246 | return 0; | |
247 | ||
248 | nla_put_failure: | |
249 | genlmsg_cancel(msg, hdr); | |
250 | free_msg: | |
251 | nlmsg_free(msg); | |
252 | return -EMSGSIZE; | |
253 | } | |
254 | ||
255 | int nfc_genl_device_removed(struct nfc_dev *dev) | |
256 | { | |
257 | struct sk_buff *msg; | |
258 | void *hdr; | |
259 | ||
4d12b8b1 LRV |
260 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
261 | if (!msg) | |
262 | return -ENOMEM; | |
263 | ||
264 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 265 | NFC_EVENT_DEVICE_REMOVED); |
4d12b8b1 LRV |
266 | if (!hdr) |
267 | goto free_msg; | |
268 | ||
1e6428d8 DM |
269 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
270 | goto nla_put_failure; | |
4d12b8b1 LRV |
271 | |
272 | genlmsg_end(msg, hdr); | |
273 | ||
274 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
275 | ||
276 | return 0; | |
277 | ||
278 | nla_put_failure: | |
279 | genlmsg_cancel(msg, hdr); | |
280 | free_msg: | |
281 | nlmsg_free(msg); | |
282 | return -EMSGSIZE; | |
283 | } | |
284 | ||
285 | static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev, | |
0a40acb2 SO |
286 | u32 pid, u32 seq, |
287 | struct netlink_callback *cb, | |
288 | int flags) | |
4d12b8b1 LRV |
289 | { |
290 | void *hdr; | |
291 | ||
4d12b8b1 | 292 | hdr = genlmsg_put(msg, pid, seq, &nfc_genl_family, flags, |
0a40acb2 | 293 | NFC_CMD_GET_DEVICE); |
4d12b8b1 LRV |
294 | if (!hdr) |
295 | return -EMSGSIZE; | |
296 | ||
297 | if (cb) | |
298 | genl_dump_check_consistent(cb, hdr, &nfc_genl_family); | |
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 | return genlmsg_end(msg, hdr); | |
307 | ||
308 | nla_put_failure: | |
309 | genlmsg_cancel(msg, hdr); | |
310 | return -EMSGSIZE; | |
311 | } | |
312 | ||
313 | static int nfc_genl_dump_devices(struct sk_buff *skb, | |
0a40acb2 | 314 | struct netlink_callback *cb) |
4d12b8b1 LRV |
315 | { |
316 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
317 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
318 | bool first_call = false; | |
319 | ||
4d12b8b1 LRV |
320 | if (!iter) { |
321 | first_call = true; | |
322 | iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL); | |
323 | if (!iter) | |
324 | return -ENOMEM; | |
325 | cb->args[0] = (long) iter; | |
326 | } | |
327 | ||
328 | mutex_lock(&nfc_devlist_mutex); | |
329 | ||
330 | cb->seq = nfc_devlist_generation; | |
331 | ||
332 | if (first_call) { | |
333 | nfc_device_iter_init(iter); | |
334 | dev = nfc_device_iter_next(iter); | |
335 | } | |
336 | ||
337 | while (dev) { | |
338 | int rc; | |
339 | ||
340 | rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).pid, | |
0a40acb2 | 341 | cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); |
4d12b8b1 LRV |
342 | if (rc < 0) |
343 | break; | |
344 | ||
345 | dev = nfc_device_iter_next(iter); | |
346 | } | |
347 | ||
348 | mutex_unlock(&nfc_devlist_mutex); | |
349 | ||
350 | cb->args[1] = (long) dev; | |
351 | ||
352 | return skb->len; | |
353 | } | |
354 | ||
355 | static int nfc_genl_dump_devices_done(struct netlink_callback *cb) | |
356 | { | |
357 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
358 | ||
4d12b8b1 LRV |
359 | nfc_device_iter_exit(iter); |
360 | kfree(iter); | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
1ed28f61 | 365 | int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx, |
0a40acb2 | 366 | u8 comm_mode, u8 rf_mode) |
1ed28f61 SO |
367 | { |
368 | struct sk_buff *msg; | |
369 | void *hdr; | |
370 | ||
371 | pr_debug("DEP link is up\n"); | |
372 | ||
373 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
374 | if (!msg) | |
375 | return -ENOMEM; | |
376 | ||
0a40acb2 | 377 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP); |
1ed28f61 SO |
378 | if (!hdr) |
379 | goto free_msg; | |
380 | ||
1e6428d8 DM |
381 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
382 | goto nla_put_failure; | |
383 | if (rf_mode == NFC_RF_INITIATOR && | |
384 | nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx)) | |
385 | goto nla_put_failure; | |
386 | if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) || | |
387 | nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode)) | |
388 | goto nla_put_failure; | |
1ed28f61 SO |
389 | |
390 | genlmsg_end(msg, hdr); | |
391 | ||
392 | dev->dep_link_up = true; | |
393 | ||
394 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
395 | ||
396 | return 0; | |
397 | ||
398 | nla_put_failure: | |
399 | genlmsg_cancel(msg, hdr); | |
400 | free_msg: | |
401 | nlmsg_free(msg); | |
402 | return -EMSGSIZE; | |
403 | } | |
404 | ||
405 | int nfc_genl_dep_link_down_event(struct nfc_dev *dev) | |
406 | { | |
407 | struct sk_buff *msg; | |
408 | void *hdr; | |
409 | ||
410 | pr_debug("DEP link is down\n"); | |
411 | ||
412 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
413 | if (!msg) | |
414 | return -ENOMEM; | |
415 | ||
416 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 417 | NFC_CMD_DEP_LINK_DOWN); |
1ed28f61 SO |
418 | if (!hdr) |
419 | goto free_msg; | |
420 | ||
1e6428d8 DM |
421 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
422 | goto nla_put_failure; | |
1ed28f61 SO |
423 | |
424 | genlmsg_end(msg, hdr); | |
425 | ||
426 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
427 | ||
428 | return 0; | |
429 | ||
430 | nla_put_failure: | |
431 | genlmsg_cancel(msg, hdr); | |
432 | free_msg: | |
433 | nlmsg_free(msg); | |
434 | return -EMSGSIZE; | |
435 | } | |
436 | ||
4d12b8b1 LRV |
437 | static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info) |
438 | { | |
439 | struct sk_buff *msg; | |
440 | struct nfc_dev *dev; | |
441 | u32 idx; | |
442 | int rc = -ENOBUFS; | |
443 | ||
4d12b8b1 LRV |
444 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
445 | return -EINVAL; | |
446 | ||
447 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
448 | ||
449 | dev = nfc_get_device(idx); | |
450 | if (!dev) | |
451 | return -ENODEV; | |
452 | ||
453 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
454 | if (!msg) { | |
455 | rc = -ENOMEM; | |
456 | goto out_putdev; | |
457 | } | |
458 | ||
459 | rc = nfc_genl_send_device(msg, dev, info->snd_pid, info->snd_seq, | |
0a40acb2 | 460 | NULL, 0); |
4d12b8b1 LRV |
461 | if (rc < 0) |
462 | goto out_free; | |
463 | ||
464 | nfc_put_device(dev); | |
465 | ||
466 | return genlmsg_reply(msg, info); | |
467 | ||
468 | out_free: | |
469 | nlmsg_free(msg); | |
470 | out_putdev: | |
471 | nfc_put_device(dev); | |
472 | return rc; | |
473 | } | |
474 | ||
8b3fe7b5 IE |
475 | static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info) |
476 | { | |
477 | struct nfc_dev *dev; | |
478 | int rc; | |
479 | u32 idx; | |
480 | ||
8b3fe7b5 IE |
481 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
482 | return -EINVAL; | |
483 | ||
484 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
485 | ||
486 | dev = nfc_get_device(idx); | |
487 | if (!dev) | |
488 | return -ENODEV; | |
489 | ||
490 | rc = nfc_dev_up(dev); | |
491 | ||
492 | nfc_put_device(dev); | |
493 | return rc; | |
494 | } | |
495 | ||
496 | static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info) | |
497 | { | |
498 | struct nfc_dev *dev; | |
499 | int rc; | |
500 | u32 idx; | |
501 | ||
8b3fe7b5 IE |
502 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
503 | return -EINVAL; | |
504 | ||
505 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
506 | ||
507 | dev = nfc_get_device(idx); | |
508 | if (!dev) | |
509 | return -ENODEV; | |
510 | ||
511 | rc = nfc_dev_down(dev); | |
512 | ||
513 | nfc_put_device(dev); | |
514 | return rc; | |
515 | } | |
516 | ||
4d12b8b1 LRV |
517 | static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info) |
518 | { | |
519 | struct nfc_dev *dev; | |
520 | int rc; | |
521 | u32 idx; | |
522 | u32 protocols; | |
523 | ||
1ed28f61 SO |
524 | pr_debug("Poll start\n"); |
525 | ||
4d12b8b1 | 526 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
0a40acb2 | 527 | !info->attrs[NFC_ATTR_PROTOCOLS]) |
4d12b8b1 LRV |
528 | return -EINVAL; |
529 | ||
530 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
531 | protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); | |
532 | ||
533 | dev = nfc_get_device(idx); | |
534 | if (!dev) | |
535 | return -ENODEV; | |
536 | ||
537 | mutex_lock(&dev->genl_data.genl_data_mutex); | |
538 | ||
539 | rc = nfc_start_poll(dev, protocols); | |
540 | if (!rc) | |
541 | dev->genl_data.poll_req_pid = info->snd_pid; | |
542 | ||
543 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
544 | ||
545 | nfc_put_device(dev); | |
546 | return rc; | |
547 | } | |
548 | ||
549 | static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info) | |
550 | { | |
551 | struct nfc_dev *dev; | |
552 | int rc; | |
553 | u32 idx; | |
554 | ||
4d12b8b1 LRV |
555 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
556 | return -EINVAL; | |
557 | ||
558 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
559 | ||
560 | dev = nfc_get_device(idx); | |
561 | if (!dev) | |
562 | return -ENODEV; | |
563 | ||
564 | mutex_lock(&dev->genl_data.genl_data_mutex); | |
565 | ||
566 | if (dev->genl_data.poll_req_pid != info->snd_pid) { | |
567 | rc = -EBUSY; | |
568 | goto out; | |
569 | } | |
570 | ||
571 | rc = nfc_stop_poll(dev); | |
572 | dev->genl_data.poll_req_pid = 0; | |
573 | ||
574 | out: | |
575 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
576 | nfc_put_device(dev); | |
577 | return rc; | |
578 | } | |
579 | ||
1ed28f61 SO |
580 | static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info) |
581 | { | |
582 | struct nfc_dev *dev; | |
583 | int rc, tgt_idx; | |
584 | u32 idx; | |
47807d3d | 585 | u8 comm; |
1ed28f61 SO |
586 | |
587 | pr_debug("DEP link up\n"); | |
588 | ||
589 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
47807d3d | 590 | !info->attrs[NFC_ATTR_COMM_MODE]) |
1ed28f61 SO |
591 | return -EINVAL; |
592 | ||
593 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
594 | if (!info->attrs[NFC_ATTR_TARGET_INDEX]) | |
595 | tgt_idx = NFC_TARGET_IDX_ANY; | |
596 | else | |
597 | tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); | |
598 | ||
599 | comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]); | |
1ed28f61 SO |
600 | |
601 | if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE) | |
602 | return -EINVAL; | |
603 | ||
1ed28f61 SO |
604 | dev = nfc_get_device(idx); |
605 | if (!dev) | |
606 | return -ENODEV; | |
607 | ||
47807d3d | 608 | rc = nfc_dep_link_up(dev, tgt_idx, comm); |
1ed28f61 SO |
609 | |
610 | nfc_put_device(dev); | |
611 | ||
612 | return rc; | |
613 | } | |
614 | ||
615 | static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) | |
616 | { | |
617 | struct nfc_dev *dev; | |
618 | int rc; | |
619 | u32 idx; | |
620 | ||
621 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) | |
622 | return -EINVAL; | |
623 | ||
624 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
625 | ||
626 | dev = nfc_get_device(idx); | |
627 | if (!dev) | |
628 | return -ENODEV; | |
629 | ||
630 | rc = nfc_dep_link_down(dev); | |
631 | ||
632 | nfc_put_device(dev); | |
633 | return rc; | |
634 | } | |
635 | ||
4d12b8b1 LRV |
636 | static struct genl_ops nfc_genl_ops[] = { |
637 | { | |
638 | .cmd = NFC_CMD_GET_DEVICE, | |
639 | .doit = nfc_genl_get_device, | |
640 | .dumpit = nfc_genl_dump_devices, | |
641 | .done = nfc_genl_dump_devices_done, | |
642 | .policy = nfc_genl_policy, | |
8b3fe7b5 IE |
643 | }, |
644 | { | |
645 | .cmd = NFC_CMD_DEV_UP, | |
646 | .doit = nfc_genl_dev_up, | |
647 | .policy = nfc_genl_policy, | |
648 | }, | |
649 | { | |
650 | .cmd = NFC_CMD_DEV_DOWN, | |
651 | .doit = nfc_genl_dev_down, | |
652 | .policy = nfc_genl_policy, | |
4d12b8b1 LRV |
653 | }, |
654 | { | |
655 | .cmd = NFC_CMD_START_POLL, | |
656 | .doit = nfc_genl_start_poll, | |
657 | .policy = nfc_genl_policy, | |
658 | }, | |
659 | { | |
660 | .cmd = NFC_CMD_STOP_POLL, | |
661 | .doit = nfc_genl_stop_poll, | |
662 | .policy = nfc_genl_policy, | |
663 | }, | |
1ed28f61 SO |
664 | { |
665 | .cmd = NFC_CMD_DEP_LINK_UP, | |
666 | .doit = nfc_genl_dep_link_up, | |
667 | .policy = nfc_genl_policy, | |
668 | }, | |
669 | { | |
670 | .cmd = NFC_CMD_DEP_LINK_DOWN, | |
671 | .doit = nfc_genl_dep_link_down, | |
672 | .policy = nfc_genl_policy, | |
673 | }, | |
4d12b8b1 LRV |
674 | { |
675 | .cmd = NFC_CMD_GET_TARGET, | |
676 | .dumpit = nfc_genl_dump_targets, | |
677 | .done = nfc_genl_dump_targets_done, | |
678 | .policy = nfc_genl_policy, | |
679 | }, | |
680 | }; | |
681 | ||
682 | static int nfc_genl_rcv_nl_event(struct notifier_block *this, | |
0a40acb2 | 683 | unsigned long event, void *ptr) |
4d12b8b1 LRV |
684 | { |
685 | struct netlink_notify *n = ptr; | |
686 | struct class_dev_iter iter; | |
687 | struct nfc_dev *dev; | |
688 | ||
689 | if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC) | |
690 | goto out; | |
691 | ||
20c239c1 | 692 | pr_debug("NETLINK_URELEASE event from id %d\n", n->pid); |
4d12b8b1 LRV |
693 | |
694 | nfc_device_iter_init(&iter); | |
695 | dev = nfc_device_iter_next(&iter); | |
696 | ||
697 | while (dev) { | |
4d12b8b1 LRV |
698 | if (dev->genl_data.poll_req_pid == n->pid) { |
699 | nfc_stop_poll(dev); | |
700 | dev->genl_data.poll_req_pid = 0; | |
701 | } | |
4d12b8b1 LRV |
702 | dev = nfc_device_iter_next(&iter); |
703 | } | |
704 | ||
705 | nfc_device_iter_exit(&iter); | |
706 | ||
707 | out: | |
708 | return NOTIFY_DONE; | |
709 | } | |
710 | ||
711 | void nfc_genl_data_init(struct nfc_genl_data *genl_data) | |
712 | { | |
713 | genl_data->poll_req_pid = 0; | |
714 | mutex_init(&genl_data->genl_data_mutex); | |
715 | } | |
716 | ||
717 | void nfc_genl_data_exit(struct nfc_genl_data *genl_data) | |
718 | { | |
719 | mutex_destroy(&genl_data->genl_data_mutex); | |
720 | } | |
721 | ||
722 | static struct notifier_block nl_notifier = { | |
723 | .notifier_call = nfc_genl_rcv_nl_event, | |
724 | }; | |
725 | ||
726 | /** | |
727 | * nfc_genl_init() - Initialize netlink interface | |
728 | * | |
729 | * This initialization function registers the nfc netlink family. | |
730 | */ | |
731 | int __init nfc_genl_init(void) | |
732 | { | |
733 | int rc; | |
734 | ||
735 | rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops, | |
0a40acb2 | 736 | ARRAY_SIZE(nfc_genl_ops)); |
4d12b8b1 LRV |
737 | if (rc) |
738 | return rc; | |
739 | ||
740 | rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp); | |
741 | ||
742 | netlink_register_notifier(&nl_notifier); | |
743 | ||
744 | return rc; | |
745 | } | |
746 | ||
747 | /** | |
748 | * nfc_genl_exit() - Deinitialize netlink interface | |
749 | * | |
750 | * This exit function unregisters the nfc netlink family. | |
751 | */ | |
752 | void nfc_genl_exit(void) | |
753 | { | |
754 | netlink_unregister_notifier(&nl_notifier); | |
755 | genl_unregister_family(&nfc_genl_family); | |
756 | } |