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 | ||
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 }, |
fe7c5800 SO |
52 | [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 }, |
53 | [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 }, | |
4d12b8b1 LRV |
54 | }; |
55 | ||
56 | static 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 | ||
4d12b8b1 | 61 | hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).pid, 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 | ||
88 | nla_put_failure: | |
89 | genlmsg_cancel(msg, hdr); | |
90 | return -EMSGSIZE; | |
91 | } | |
92 | ||
93 | static 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 | ||
118 | static 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 | ||
153 | static 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 | ||
163 | int nfc_genl_targets_found(struct nfc_dev *dev) | |
164 | { | |
165 | struct sk_buff *msg; | |
166 | void *hdr; | |
167 | ||
4d12b8b1 LRV |
168 | dev->genl_data.poll_req_pid = 0; |
169 | ||
170 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
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 | ||
186 | nla_put_failure: | |
187 | genlmsg_cancel(msg, hdr); | |
188 | free_msg: | |
189 | nlmsg_free(msg); | |
190 | return -EMSGSIZE; | |
191 | } | |
192 | ||
8112a5c9 SO |
193 | int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx) |
194 | { | |
195 | struct sk_buff *msg; | |
196 | void *hdr; | |
197 | ||
198 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
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 | ||
217 | nla_put_failure: | |
218 | genlmsg_cancel(msg, hdr); | |
219 | free_msg: | |
220 | nlmsg_free(msg); | |
221 | return -EMSGSIZE; | |
222 | } | |
223 | ||
4d12b8b1 LRV |
224 | int nfc_genl_device_added(struct nfc_dev *dev) |
225 | { | |
226 | struct sk_buff *msg; | |
227 | void *hdr; | |
228 | ||
4d12b8b1 LRV |
229 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
230 | if (!msg) | |
231 | return -ENOMEM; | |
232 | ||
233 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 234 | NFC_EVENT_DEVICE_ADDED); |
4d12b8b1 LRV |
235 | if (!hdr) |
236 | goto free_msg; | |
237 | ||
1e6428d8 DM |
238 | if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
239 | nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || | |
240 | nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) || | |
241 | nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up)) | |
242 | goto nla_put_failure; | |
4d12b8b1 LRV |
243 | |
244 | genlmsg_end(msg, hdr); | |
245 | ||
246 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
247 | ||
248 | return 0; | |
249 | ||
250 | nla_put_failure: | |
251 | genlmsg_cancel(msg, hdr); | |
252 | free_msg: | |
253 | nlmsg_free(msg); | |
254 | return -EMSGSIZE; | |
255 | } | |
256 | ||
257 | int nfc_genl_device_removed(struct nfc_dev *dev) | |
258 | { | |
259 | struct sk_buff *msg; | |
260 | void *hdr; | |
261 | ||
4d12b8b1 LRV |
262 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
263 | if (!msg) | |
264 | return -ENOMEM; | |
265 | ||
266 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 267 | NFC_EVENT_DEVICE_REMOVED); |
4d12b8b1 LRV |
268 | if (!hdr) |
269 | goto free_msg; | |
270 | ||
1e6428d8 DM |
271 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
272 | goto nla_put_failure; | |
4d12b8b1 LRV |
273 | |
274 | genlmsg_end(msg, hdr); | |
275 | ||
276 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
277 | ||
278 | return 0; | |
279 | ||
280 | nla_put_failure: | |
281 | genlmsg_cancel(msg, hdr); | |
282 | free_msg: | |
283 | nlmsg_free(msg); | |
284 | return -EMSGSIZE; | |
285 | } | |
286 | ||
287 | static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev, | |
0a40acb2 SO |
288 | u32 pid, u32 seq, |
289 | struct netlink_callback *cb, | |
290 | int flags) | |
4d12b8b1 LRV |
291 | { |
292 | void *hdr; | |
293 | ||
4d12b8b1 | 294 | hdr = genlmsg_put(msg, pid, seq, &nfc_genl_family, flags, |
0a40acb2 | 295 | NFC_CMD_GET_DEVICE); |
4d12b8b1 LRV |
296 | if (!hdr) |
297 | return -EMSGSIZE; | |
298 | ||
299 | if (cb) | |
300 | genl_dump_check_consistent(cb, hdr, &nfc_genl_family); | |
301 | ||
1e6428d8 DM |
302 | if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
303 | nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || | |
304 | nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) || | |
305 | nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up)) | |
306 | goto nla_put_failure; | |
4d12b8b1 LRV |
307 | |
308 | return genlmsg_end(msg, hdr); | |
309 | ||
310 | nla_put_failure: | |
311 | genlmsg_cancel(msg, hdr); | |
312 | return -EMSGSIZE; | |
313 | } | |
314 | ||
315 | static int nfc_genl_dump_devices(struct sk_buff *skb, | |
0a40acb2 | 316 | struct netlink_callback *cb) |
4d12b8b1 LRV |
317 | { |
318 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
319 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
320 | bool first_call = false; | |
321 | ||
4d12b8b1 LRV |
322 | if (!iter) { |
323 | first_call = true; | |
324 | iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL); | |
325 | if (!iter) | |
326 | return -ENOMEM; | |
327 | cb->args[0] = (long) iter; | |
328 | } | |
329 | ||
330 | mutex_lock(&nfc_devlist_mutex); | |
331 | ||
332 | cb->seq = nfc_devlist_generation; | |
333 | ||
334 | if (first_call) { | |
335 | nfc_device_iter_init(iter); | |
336 | dev = nfc_device_iter_next(iter); | |
337 | } | |
338 | ||
339 | while (dev) { | |
340 | int rc; | |
341 | ||
342 | rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).pid, | |
0a40acb2 | 343 | cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); |
4d12b8b1 LRV |
344 | if (rc < 0) |
345 | break; | |
346 | ||
347 | dev = nfc_device_iter_next(iter); | |
348 | } | |
349 | ||
350 | mutex_unlock(&nfc_devlist_mutex); | |
351 | ||
352 | cb->args[1] = (long) dev; | |
353 | ||
354 | return skb->len; | |
355 | } | |
356 | ||
357 | static int nfc_genl_dump_devices_done(struct netlink_callback *cb) | |
358 | { | |
359 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
360 | ||
4d12b8b1 LRV |
361 | nfc_device_iter_exit(iter); |
362 | kfree(iter); | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
1ed28f61 | 367 | int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx, |
0a40acb2 | 368 | u8 comm_mode, u8 rf_mode) |
1ed28f61 SO |
369 | { |
370 | struct sk_buff *msg; | |
371 | void *hdr; | |
372 | ||
373 | pr_debug("DEP link is up\n"); | |
374 | ||
375 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
376 | if (!msg) | |
377 | return -ENOMEM; | |
378 | ||
0a40acb2 | 379 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP); |
1ed28f61 SO |
380 | if (!hdr) |
381 | goto free_msg; | |
382 | ||
1e6428d8 DM |
383 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
384 | goto nla_put_failure; | |
385 | if (rf_mode == NFC_RF_INITIATOR && | |
386 | nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx)) | |
387 | goto nla_put_failure; | |
388 | if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) || | |
389 | nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode)) | |
390 | goto nla_put_failure; | |
1ed28f61 SO |
391 | |
392 | genlmsg_end(msg, hdr); | |
393 | ||
394 | dev->dep_link_up = true; | |
395 | ||
396 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
397 | ||
398 | return 0; | |
399 | ||
400 | nla_put_failure: | |
401 | genlmsg_cancel(msg, hdr); | |
402 | free_msg: | |
403 | nlmsg_free(msg); | |
404 | return -EMSGSIZE; | |
405 | } | |
406 | ||
407 | int nfc_genl_dep_link_down_event(struct nfc_dev *dev) | |
408 | { | |
409 | struct sk_buff *msg; | |
410 | void *hdr; | |
411 | ||
412 | pr_debug("DEP link is down\n"); | |
413 | ||
414 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
415 | if (!msg) | |
416 | return -ENOMEM; | |
417 | ||
418 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 419 | NFC_CMD_DEP_LINK_DOWN); |
1ed28f61 SO |
420 | if (!hdr) |
421 | goto free_msg; | |
422 | ||
1e6428d8 DM |
423 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
424 | goto nla_put_failure; | |
1ed28f61 SO |
425 | |
426 | genlmsg_end(msg, hdr); | |
427 | ||
428 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
429 | ||
430 | return 0; | |
431 | ||
432 | nla_put_failure: | |
433 | genlmsg_cancel(msg, hdr); | |
434 | free_msg: | |
435 | nlmsg_free(msg); | |
436 | return -EMSGSIZE; | |
437 | } | |
438 | ||
4d12b8b1 LRV |
439 | static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info) |
440 | { | |
441 | struct sk_buff *msg; | |
442 | struct nfc_dev *dev; | |
443 | u32 idx; | |
444 | int rc = -ENOBUFS; | |
445 | ||
4d12b8b1 LRV |
446 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
447 | return -EINVAL; | |
448 | ||
449 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
450 | ||
451 | dev = nfc_get_device(idx); | |
452 | if (!dev) | |
453 | return -ENODEV; | |
454 | ||
455 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
456 | if (!msg) { | |
457 | rc = -ENOMEM; | |
458 | goto out_putdev; | |
459 | } | |
460 | ||
461 | rc = nfc_genl_send_device(msg, dev, info->snd_pid, info->snd_seq, | |
0a40acb2 | 462 | NULL, 0); |
4d12b8b1 LRV |
463 | if (rc < 0) |
464 | goto out_free; | |
465 | ||
466 | nfc_put_device(dev); | |
467 | ||
468 | return genlmsg_reply(msg, info); | |
469 | ||
470 | out_free: | |
471 | nlmsg_free(msg); | |
472 | out_putdev: | |
473 | nfc_put_device(dev); | |
474 | return rc; | |
475 | } | |
476 | ||
8b3fe7b5 IE |
477 | static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info) |
478 | { | |
479 | struct nfc_dev *dev; | |
480 | int rc; | |
481 | u32 idx; | |
482 | ||
8b3fe7b5 IE |
483 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
484 | return -EINVAL; | |
485 | ||
486 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
487 | ||
488 | dev = nfc_get_device(idx); | |
489 | if (!dev) | |
490 | return -ENODEV; | |
491 | ||
492 | rc = nfc_dev_up(dev); | |
493 | ||
494 | nfc_put_device(dev); | |
495 | return rc; | |
496 | } | |
497 | ||
498 | static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info) | |
499 | { | |
500 | struct nfc_dev *dev; | |
501 | int rc; | |
502 | u32 idx; | |
503 | ||
8b3fe7b5 IE |
504 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
505 | return -EINVAL; | |
506 | ||
507 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
508 | ||
509 | dev = nfc_get_device(idx); | |
510 | if (!dev) | |
511 | return -ENODEV; | |
512 | ||
513 | rc = nfc_dev_down(dev); | |
514 | ||
515 | nfc_put_device(dev); | |
516 | return rc; | |
517 | } | |
518 | ||
4d12b8b1 LRV |
519 | static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info) |
520 | { | |
521 | struct nfc_dev *dev; | |
522 | int rc; | |
523 | u32 idx; | |
fe7c5800 | 524 | u32 im_protocols = 0, tm_protocols = 0; |
4d12b8b1 | 525 | |
1ed28f61 SO |
526 | pr_debug("Poll start\n"); |
527 | ||
4d12b8b1 | 528 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
fe7c5800 SO |
529 | ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] && |
530 | !info->attrs[NFC_ATTR_PROTOCOLS]) && | |
531 | !info->attrs[NFC_ATTR_TM_PROTOCOLS])) | |
4d12b8b1 LRV |
532 | return -EINVAL; |
533 | ||
534 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
fe7c5800 SO |
535 | |
536 | if (info->attrs[NFC_ATTR_TM_PROTOCOLS]) | |
537 | tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]); | |
538 | else if (info->attrs[NFC_ATTR_PROTOCOLS]) | |
539 | tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); | |
540 | ||
541 | if (info->attrs[NFC_ATTR_IM_PROTOCOLS]) | |
542 | im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]); | |
4d12b8b1 LRV |
543 | |
544 | dev = nfc_get_device(idx); | |
545 | if (!dev) | |
546 | return -ENODEV; | |
547 | ||
548 | mutex_lock(&dev->genl_data.genl_data_mutex); | |
549 | ||
fe7c5800 | 550 | rc = nfc_start_poll(dev, im_protocols, tm_protocols); |
4d12b8b1 LRV |
551 | if (!rc) |
552 | dev->genl_data.poll_req_pid = info->snd_pid; | |
553 | ||
554 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
555 | ||
556 | nfc_put_device(dev); | |
557 | return rc; | |
558 | } | |
559 | ||
560 | static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info) | |
561 | { | |
562 | struct nfc_dev *dev; | |
563 | int rc; | |
564 | u32 idx; | |
565 | ||
4d12b8b1 LRV |
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 | mutex_lock(&dev->genl_data.genl_data_mutex); | |
576 | ||
577 | if (dev->genl_data.poll_req_pid != info->snd_pid) { | |
578 | rc = -EBUSY; | |
579 | goto out; | |
580 | } | |
581 | ||
582 | rc = nfc_stop_poll(dev); | |
583 | dev->genl_data.poll_req_pid = 0; | |
584 | ||
585 | out: | |
586 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
587 | nfc_put_device(dev); | |
588 | return rc; | |
589 | } | |
590 | ||
1ed28f61 SO |
591 | static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info) |
592 | { | |
593 | struct nfc_dev *dev; | |
594 | int rc, tgt_idx; | |
595 | u32 idx; | |
47807d3d | 596 | u8 comm; |
1ed28f61 SO |
597 | |
598 | pr_debug("DEP link up\n"); | |
599 | ||
600 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
47807d3d | 601 | !info->attrs[NFC_ATTR_COMM_MODE]) |
1ed28f61 SO |
602 | return -EINVAL; |
603 | ||
604 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
605 | if (!info->attrs[NFC_ATTR_TARGET_INDEX]) | |
606 | tgt_idx = NFC_TARGET_IDX_ANY; | |
607 | else | |
608 | tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); | |
609 | ||
610 | comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]); | |
1ed28f61 SO |
611 | |
612 | if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE) | |
613 | return -EINVAL; | |
614 | ||
1ed28f61 SO |
615 | dev = nfc_get_device(idx); |
616 | if (!dev) | |
617 | return -ENODEV; | |
618 | ||
47807d3d | 619 | rc = nfc_dep_link_up(dev, tgt_idx, comm); |
1ed28f61 SO |
620 | |
621 | nfc_put_device(dev); | |
622 | ||
623 | return rc; | |
624 | } | |
625 | ||
626 | static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) | |
627 | { | |
628 | struct nfc_dev *dev; | |
629 | int rc; | |
630 | u32 idx; | |
631 | ||
632 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) | |
633 | return -EINVAL; | |
634 | ||
635 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
636 | ||
637 | dev = nfc_get_device(idx); | |
638 | if (!dev) | |
639 | return -ENODEV; | |
640 | ||
641 | rc = nfc_dep_link_down(dev); | |
642 | ||
643 | nfc_put_device(dev); | |
644 | return rc; | |
645 | } | |
646 | ||
4d12b8b1 LRV |
647 | static struct genl_ops nfc_genl_ops[] = { |
648 | { | |
649 | .cmd = NFC_CMD_GET_DEVICE, | |
650 | .doit = nfc_genl_get_device, | |
651 | .dumpit = nfc_genl_dump_devices, | |
652 | .done = nfc_genl_dump_devices_done, | |
653 | .policy = nfc_genl_policy, | |
8b3fe7b5 IE |
654 | }, |
655 | { | |
656 | .cmd = NFC_CMD_DEV_UP, | |
657 | .doit = nfc_genl_dev_up, | |
658 | .policy = nfc_genl_policy, | |
659 | }, | |
660 | { | |
661 | .cmd = NFC_CMD_DEV_DOWN, | |
662 | .doit = nfc_genl_dev_down, | |
663 | .policy = nfc_genl_policy, | |
4d12b8b1 LRV |
664 | }, |
665 | { | |
666 | .cmd = NFC_CMD_START_POLL, | |
667 | .doit = nfc_genl_start_poll, | |
668 | .policy = nfc_genl_policy, | |
669 | }, | |
670 | { | |
671 | .cmd = NFC_CMD_STOP_POLL, | |
672 | .doit = nfc_genl_stop_poll, | |
673 | .policy = nfc_genl_policy, | |
674 | }, | |
1ed28f61 SO |
675 | { |
676 | .cmd = NFC_CMD_DEP_LINK_UP, | |
677 | .doit = nfc_genl_dep_link_up, | |
678 | .policy = nfc_genl_policy, | |
679 | }, | |
680 | { | |
681 | .cmd = NFC_CMD_DEP_LINK_DOWN, | |
682 | .doit = nfc_genl_dep_link_down, | |
683 | .policy = nfc_genl_policy, | |
684 | }, | |
4d12b8b1 LRV |
685 | { |
686 | .cmd = NFC_CMD_GET_TARGET, | |
687 | .dumpit = nfc_genl_dump_targets, | |
688 | .done = nfc_genl_dump_targets_done, | |
689 | .policy = nfc_genl_policy, | |
690 | }, | |
691 | }; | |
692 | ||
693 | static int nfc_genl_rcv_nl_event(struct notifier_block *this, | |
0a40acb2 | 694 | unsigned long event, void *ptr) |
4d12b8b1 LRV |
695 | { |
696 | struct netlink_notify *n = ptr; | |
697 | struct class_dev_iter iter; | |
698 | struct nfc_dev *dev; | |
699 | ||
700 | if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC) | |
701 | goto out; | |
702 | ||
20c239c1 | 703 | pr_debug("NETLINK_URELEASE event from id %d\n", n->pid); |
4d12b8b1 LRV |
704 | |
705 | nfc_device_iter_init(&iter); | |
706 | dev = nfc_device_iter_next(&iter); | |
707 | ||
708 | while (dev) { | |
4d12b8b1 LRV |
709 | if (dev->genl_data.poll_req_pid == n->pid) { |
710 | nfc_stop_poll(dev); | |
711 | dev->genl_data.poll_req_pid = 0; | |
712 | } | |
4d12b8b1 LRV |
713 | dev = nfc_device_iter_next(&iter); |
714 | } | |
715 | ||
716 | nfc_device_iter_exit(&iter); | |
717 | ||
718 | out: | |
719 | return NOTIFY_DONE; | |
720 | } | |
721 | ||
722 | void nfc_genl_data_init(struct nfc_genl_data *genl_data) | |
723 | { | |
724 | genl_data->poll_req_pid = 0; | |
725 | mutex_init(&genl_data->genl_data_mutex); | |
726 | } | |
727 | ||
728 | void nfc_genl_data_exit(struct nfc_genl_data *genl_data) | |
729 | { | |
730 | mutex_destroy(&genl_data->genl_data_mutex); | |
731 | } | |
732 | ||
733 | static struct notifier_block nl_notifier = { | |
734 | .notifier_call = nfc_genl_rcv_nl_event, | |
735 | }; | |
736 | ||
737 | /** | |
738 | * nfc_genl_init() - Initialize netlink interface | |
739 | * | |
740 | * This initialization function registers the nfc netlink family. | |
741 | */ | |
742 | int __init nfc_genl_init(void) | |
743 | { | |
744 | int rc; | |
745 | ||
746 | rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops, | |
0a40acb2 | 747 | ARRAY_SIZE(nfc_genl_ops)); |
4d12b8b1 LRV |
748 | if (rc) |
749 | return rc; | |
750 | ||
751 | rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp); | |
752 | ||
753 | netlink_register_notifier(&nl_notifier); | |
754 | ||
755 | return rc; | |
756 | } | |
757 | ||
758 | /** | |
759 | * nfc_genl_exit() - Deinitialize netlink interface | |
760 | * | |
761 | * This exit function unregisters the nfc netlink family. | |
762 | */ | |
763 | void nfc_genl_exit(void) | |
764 | { | |
765 | netlink_unregister_notifier(&nl_notifier); | |
766 | genl_unregister_family(&nfc_genl_family); | |
767 | } |