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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 |
217 | nla_put_failure: |
218 | genlmsg_cancel(msg, hdr); | |
219 | free_msg: | |
220 | nlmsg_free(msg); | |
221 | return -EMSGSIZE; | |
222 | } | |
223 | ||
224 | int 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 | ||
249 | nla_put_failure: | |
250 | genlmsg_cancel(msg, hdr); | |
251 | free_msg: | |
252 | nlmsg_free(msg); | |
253 | return -EMSGSIZE; | |
254 | } | |
255 | ||
256 | int 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 |
279 | nla_put_failure: |
280 | genlmsg_cancel(msg, hdr); | |
281 | free_msg: | |
282 | nlmsg_free(msg); | |
283 | return -EMSGSIZE; | |
284 | } | |
285 | ||
4d12b8b1 LRV |
286 | int 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 | ||
312 | nla_put_failure: | |
313 | genlmsg_cancel(msg, hdr); | |
314 | free_msg: | |
315 | nlmsg_free(msg); | |
316 | return -EMSGSIZE; | |
317 | } | |
318 | ||
319 | int 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 | ||
342 | nla_put_failure: | |
343 | genlmsg_cancel(msg, hdr); | |
344 | free_msg: | |
345 | nlmsg_free(msg); | |
346 | return -EMSGSIZE; | |
347 | } | |
348 | ||
349 | static 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) || | |
7ad39395 TE |
367 | nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) || |
368 | nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode)) | |
1e6428d8 | 369 | goto nla_put_failure; |
4d12b8b1 LRV |
370 | |
371 | return genlmsg_end(msg, hdr); | |
372 | ||
373 | nla_put_failure: | |
374 | genlmsg_cancel(msg, hdr); | |
375 | return -EMSGSIZE; | |
376 | } | |
377 | ||
378 | static int nfc_genl_dump_devices(struct sk_buff *skb, | |
0a40acb2 | 379 | struct netlink_callback *cb) |
4d12b8b1 LRV |
380 | { |
381 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
382 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
383 | bool first_call = false; | |
384 | ||
4d12b8b1 LRV |
385 | if (!iter) { |
386 | first_call = true; | |
387 | iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL); | |
388 | if (!iter) | |
389 | return -ENOMEM; | |
390 | cb->args[0] = (long) iter; | |
391 | } | |
392 | ||
393 | mutex_lock(&nfc_devlist_mutex); | |
394 | ||
395 | cb->seq = nfc_devlist_generation; | |
396 | ||
397 | if (first_call) { | |
398 | nfc_device_iter_init(iter); | |
399 | dev = nfc_device_iter_next(iter); | |
400 | } | |
401 | ||
402 | while (dev) { | |
403 | int rc; | |
404 | ||
15e47304 | 405 | rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid, |
0a40acb2 | 406 | cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); |
4d12b8b1 LRV |
407 | if (rc < 0) |
408 | break; | |
409 | ||
410 | dev = nfc_device_iter_next(iter); | |
411 | } | |
412 | ||
413 | mutex_unlock(&nfc_devlist_mutex); | |
414 | ||
415 | cb->args[1] = (long) dev; | |
416 | ||
417 | return skb->len; | |
418 | } | |
419 | ||
420 | static int nfc_genl_dump_devices_done(struct netlink_callback *cb) | |
421 | { | |
422 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
423 | ||
4d12b8b1 LRV |
424 | nfc_device_iter_exit(iter); |
425 | kfree(iter); | |
426 | ||
427 | return 0; | |
428 | } | |
429 | ||
1ed28f61 | 430 | int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx, |
0a40acb2 | 431 | u8 comm_mode, u8 rf_mode) |
1ed28f61 SO |
432 | { |
433 | struct sk_buff *msg; | |
434 | void *hdr; | |
435 | ||
436 | pr_debug("DEP link is up\n"); | |
437 | ||
58050fce | 438 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1ed28f61 SO |
439 | if (!msg) |
440 | return -ENOMEM; | |
441 | ||
0a40acb2 | 442 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP); |
1ed28f61 SO |
443 | if (!hdr) |
444 | goto free_msg; | |
445 | ||
1e6428d8 DM |
446 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
447 | goto nla_put_failure; | |
448 | if (rf_mode == NFC_RF_INITIATOR && | |
449 | nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx)) | |
450 | goto nla_put_failure; | |
451 | if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) || | |
452 | nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode)) | |
453 | goto nla_put_failure; | |
1ed28f61 SO |
454 | |
455 | genlmsg_end(msg, hdr); | |
456 | ||
457 | dev->dep_link_up = true; | |
458 | ||
459 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
460 | ||
461 | return 0; | |
462 | ||
463 | nla_put_failure: | |
464 | genlmsg_cancel(msg, hdr); | |
465 | free_msg: | |
466 | nlmsg_free(msg); | |
467 | return -EMSGSIZE; | |
468 | } | |
469 | ||
470 | int nfc_genl_dep_link_down_event(struct nfc_dev *dev) | |
471 | { | |
472 | struct sk_buff *msg; | |
473 | void *hdr; | |
474 | ||
475 | pr_debug("DEP link is down\n"); | |
476 | ||
58050fce | 477 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1ed28f61 SO |
478 | if (!msg) |
479 | return -ENOMEM; | |
480 | ||
481 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 482 | NFC_CMD_DEP_LINK_DOWN); |
1ed28f61 SO |
483 | if (!hdr) |
484 | goto free_msg; | |
485 | ||
1e6428d8 DM |
486 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
487 | goto nla_put_failure; | |
1ed28f61 SO |
488 | |
489 | genlmsg_end(msg, hdr); | |
490 | ||
491 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
492 | ||
493 | return 0; | |
494 | ||
495 | nla_put_failure: | |
496 | genlmsg_cancel(msg, hdr); | |
497 | free_msg: | |
498 | nlmsg_free(msg); | |
499 | return -EMSGSIZE; | |
500 | } | |
501 | ||
4d12b8b1 LRV |
502 | static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info) |
503 | { | |
504 | struct sk_buff *msg; | |
505 | struct nfc_dev *dev; | |
506 | u32 idx; | |
507 | int rc = -ENOBUFS; | |
508 | ||
4d12b8b1 LRV |
509 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
510 | return -EINVAL; | |
511 | ||
512 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
513 | ||
514 | dev = nfc_get_device(idx); | |
515 | if (!dev) | |
516 | return -ENODEV; | |
517 | ||
58050fce | 518 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
4d12b8b1 LRV |
519 | if (!msg) { |
520 | rc = -ENOMEM; | |
521 | goto out_putdev; | |
522 | } | |
523 | ||
15e47304 | 524 | rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq, |
0a40acb2 | 525 | NULL, 0); |
4d12b8b1 LRV |
526 | if (rc < 0) |
527 | goto out_free; | |
528 | ||
529 | nfc_put_device(dev); | |
530 | ||
531 | return genlmsg_reply(msg, info); | |
532 | ||
533 | out_free: | |
534 | nlmsg_free(msg); | |
535 | out_putdev: | |
536 | nfc_put_device(dev); | |
537 | return rc; | |
538 | } | |
539 | ||
8b3fe7b5 IE |
540 | static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info) |
541 | { | |
542 | struct nfc_dev *dev; | |
543 | int rc; | |
544 | u32 idx; | |
545 | ||
8b3fe7b5 IE |
546 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
547 | return -EINVAL; | |
548 | ||
549 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
550 | ||
551 | dev = nfc_get_device(idx); | |
552 | if (!dev) | |
553 | return -ENODEV; | |
554 | ||
555 | rc = nfc_dev_up(dev); | |
556 | ||
557 | nfc_put_device(dev); | |
558 | return rc; | |
559 | } | |
560 | ||
561 | static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info) | |
562 | { | |
563 | struct nfc_dev *dev; | |
564 | int rc; | |
565 | u32 idx; | |
566 | ||
8b3fe7b5 IE |
567 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
568 | return -EINVAL; | |
569 | ||
570 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
571 | ||
572 | dev = nfc_get_device(idx); | |
573 | if (!dev) | |
574 | return -ENODEV; | |
575 | ||
576 | rc = nfc_dev_down(dev); | |
577 | ||
578 | nfc_put_device(dev); | |
579 | return rc; | |
580 | } | |
581 | ||
4d12b8b1 LRV |
582 | static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info) |
583 | { | |
584 | struct nfc_dev *dev; | |
585 | int rc; | |
586 | u32 idx; | |
fe7c5800 | 587 | u32 im_protocols = 0, tm_protocols = 0; |
4d12b8b1 | 588 | |
1ed28f61 SO |
589 | pr_debug("Poll start\n"); |
590 | ||
4d12b8b1 | 591 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
fe7c5800 SO |
592 | ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] && |
593 | !info->attrs[NFC_ATTR_PROTOCOLS]) && | |
594 | !info->attrs[NFC_ATTR_TM_PROTOCOLS])) | |
4d12b8b1 LRV |
595 | return -EINVAL; |
596 | ||
597 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
fe7c5800 SO |
598 | |
599 | if (info->attrs[NFC_ATTR_TM_PROTOCOLS]) | |
600 | tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]); | |
fe7c5800 SO |
601 | |
602 | if (info->attrs[NFC_ATTR_IM_PROTOCOLS]) | |
603 | im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]); | |
5e50ee3a SO |
604 | else if (info->attrs[NFC_ATTR_PROTOCOLS]) |
605 | im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); | |
4d12b8b1 LRV |
606 | |
607 | dev = nfc_get_device(idx); | |
608 | if (!dev) | |
609 | return -ENODEV; | |
610 | ||
611 | mutex_lock(&dev->genl_data.genl_data_mutex); | |
612 | ||
fe7c5800 | 613 | rc = nfc_start_poll(dev, im_protocols, tm_protocols); |
4d12b8b1 | 614 | if (!rc) |
15e47304 | 615 | dev->genl_data.poll_req_portid = info->snd_portid; |
4d12b8b1 LRV |
616 | |
617 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
618 | ||
619 | nfc_put_device(dev); | |
620 | return rc; | |
621 | } | |
622 | ||
623 | static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info) | |
624 | { | |
625 | struct nfc_dev *dev; | |
626 | int rc; | |
627 | u32 idx; | |
628 | ||
4d12b8b1 LRV |
629 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
630 | return -EINVAL; | |
631 | ||
632 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
633 | ||
634 | dev = nfc_get_device(idx); | |
635 | if (!dev) | |
636 | return -ENODEV; | |
637 | ||
a831b913 SO |
638 | device_lock(&dev->dev); |
639 | ||
640 | if (!dev->polling) { | |
641 | device_unlock(&dev->dev); | |
642 | return -EINVAL; | |
643 | } | |
644 | ||
645 | device_unlock(&dev->dev); | |
646 | ||
4d12b8b1 LRV |
647 | mutex_lock(&dev->genl_data.genl_data_mutex); |
648 | ||
15e47304 | 649 | if (dev->genl_data.poll_req_portid != info->snd_portid) { |
4d12b8b1 LRV |
650 | rc = -EBUSY; |
651 | goto out; | |
652 | } | |
653 | ||
654 | rc = nfc_stop_poll(dev); | |
15e47304 | 655 | dev->genl_data.poll_req_portid = 0; |
4d12b8b1 LRV |
656 | |
657 | out: | |
658 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
659 | nfc_put_device(dev); | |
660 | return rc; | |
661 | } | |
662 | ||
1ed28f61 SO |
663 | static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info) |
664 | { | |
665 | struct nfc_dev *dev; | |
666 | int rc, tgt_idx; | |
667 | u32 idx; | |
47807d3d | 668 | u8 comm; |
1ed28f61 SO |
669 | |
670 | pr_debug("DEP link up\n"); | |
671 | ||
672 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
47807d3d | 673 | !info->attrs[NFC_ATTR_COMM_MODE]) |
1ed28f61 SO |
674 | return -EINVAL; |
675 | ||
676 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
677 | if (!info->attrs[NFC_ATTR_TARGET_INDEX]) | |
678 | tgt_idx = NFC_TARGET_IDX_ANY; | |
679 | else | |
680 | tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); | |
681 | ||
682 | comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]); | |
1ed28f61 SO |
683 | |
684 | if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE) | |
685 | return -EINVAL; | |
686 | ||
1ed28f61 SO |
687 | dev = nfc_get_device(idx); |
688 | if (!dev) | |
689 | return -ENODEV; | |
690 | ||
47807d3d | 691 | rc = nfc_dep_link_up(dev, tgt_idx, comm); |
1ed28f61 SO |
692 | |
693 | nfc_put_device(dev); | |
694 | ||
695 | return rc; | |
696 | } | |
697 | ||
698 | static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) | |
699 | { | |
700 | struct nfc_dev *dev; | |
701 | int rc; | |
702 | u32 idx; | |
703 | ||
704 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) | |
705 | return -EINVAL; | |
706 | ||
707 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
708 | ||
709 | dev = nfc_get_device(idx); | |
710 | if (!dev) | |
711 | return -ENODEV; | |
712 | ||
713 | rc = nfc_dep_link_down(dev); | |
714 | ||
715 | nfc_put_device(dev); | |
716 | return rc; | |
717 | } | |
718 | ||
4d12b8b1 LRV |
719 | static struct genl_ops nfc_genl_ops[] = { |
720 | { | |
721 | .cmd = NFC_CMD_GET_DEVICE, | |
722 | .doit = nfc_genl_get_device, | |
723 | .dumpit = nfc_genl_dump_devices, | |
724 | .done = nfc_genl_dump_devices_done, | |
725 | .policy = nfc_genl_policy, | |
8b3fe7b5 IE |
726 | }, |
727 | { | |
728 | .cmd = NFC_CMD_DEV_UP, | |
729 | .doit = nfc_genl_dev_up, | |
730 | .policy = nfc_genl_policy, | |
731 | }, | |
732 | { | |
733 | .cmd = NFC_CMD_DEV_DOWN, | |
734 | .doit = nfc_genl_dev_down, | |
735 | .policy = nfc_genl_policy, | |
4d12b8b1 LRV |
736 | }, |
737 | { | |
738 | .cmd = NFC_CMD_START_POLL, | |
739 | .doit = nfc_genl_start_poll, | |
740 | .policy = nfc_genl_policy, | |
741 | }, | |
742 | { | |
743 | .cmd = NFC_CMD_STOP_POLL, | |
744 | .doit = nfc_genl_stop_poll, | |
745 | .policy = nfc_genl_policy, | |
746 | }, | |
1ed28f61 SO |
747 | { |
748 | .cmd = NFC_CMD_DEP_LINK_UP, | |
749 | .doit = nfc_genl_dep_link_up, | |
750 | .policy = nfc_genl_policy, | |
751 | }, | |
752 | { | |
753 | .cmd = NFC_CMD_DEP_LINK_DOWN, | |
754 | .doit = nfc_genl_dep_link_down, | |
755 | .policy = nfc_genl_policy, | |
756 | }, | |
4d12b8b1 LRV |
757 | { |
758 | .cmd = NFC_CMD_GET_TARGET, | |
759 | .dumpit = nfc_genl_dump_targets, | |
760 | .done = nfc_genl_dump_targets_done, | |
761 | .policy = nfc_genl_policy, | |
762 | }, | |
763 | }; | |
764 | ||
3c0cc8aa SJ |
765 | |
766 | struct urelease_work { | |
767 | struct work_struct w; | |
c487606f | 768 | int portid; |
3c0cc8aa SJ |
769 | }; |
770 | ||
771 | static void nfc_urelease_event_work(struct work_struct *work) | |
4d12b8b1 | 772 | { |
3c0cc8aa | 773 | struct urelease_work *w = container_of(work, struct urelease_work, w); |
4d12b8b1 LRV |
774 | struct class_dev_iter iter; |
775 | struct nfc_dev *dev; | |
776 | ||
c487606f | 777 | pr_debug("portid %d\n", w->portid); |
4d12b8b1 | 778 | |
3c0cc8aa | 779 | mutex_lock(&nfc_devlist_mutex); |
4d12b8b1 LRV |
780 | |
781 | nfc_device_iter_init(&iter); | |
782 | dev = nfc_device_iter_next(&iter); | |
783 | ||
784 | while (dev) { | |
3c0cc8aa SJ |
785 | mutex_lock(&dev->genl_data.genl_data_mutex); |
786 | ||
c487606f | 787 | if (dev->genl_data.poll_req_portid == w->portid) { |
4d12b8b1 | 788 | nfc_stop_poll(dev); |
15e47304 | 789 | dev->genl_data.poll_req_portid = 0; |
4d12b8b1 | 790 | } |
3c0cc8aa SJ |
791 | |
792 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
793 | ||
4d12b8b1 LRV |
794 | dev = nfc_device_iter_next(&iter); |
795 | } | |
796 | ||
797 | nfc_device_iter_exit(&iter); | |
798 | ||
3c0cc8aa SJ |
799 | mutex_unlock(&nfc_devlist_mutex); |
800 | ||
801 | kfree(w); | |
802 | } | |
803 | ||
804 | static int nfc_genl_rcv_nl_event(struct notifier_block *this, | |
805 | unsigned long event, void *ptr) | |
806 | { | |
807 | struct netlink_notify *n = ptr; | |
808 | struct urelease_work *w; | |
809 | ||
810 | if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC) | |
811 | goto out; | |
812 | ||
c487606f | 813 | pr_debug("NETLINK_URELEASE event from id %d\n", n->portid); |
3c0cc8aa SJ |
814 | |
815 | w = kmalloc(sizeof(*w), GFP_ATOMIC); | |
816 | if (w) { | |
817 | INIT_WORK((struct work_struct *) w, nfc_urelease_event_work); | |
c487606f | 818 | w->portid = n->portid; |
3c0cc8aa SJ |
819 | schedule_work((struct work_struct *) w); |
820 | } | |
821 | ||
4d12b8b1 LRV |
822 | out: |
823 | return NOTIFY_DONE; | |
824 | } | |
825 | ||
826 | void nfc_genl_data_init(struct nfc_genl_data *genl_data) | |
827 | { | |
15e47304 | 828 | genl_data->poll_req_portid = 0; |
4d12b8b1 LRV |
829 | mutex_init(&genl_data->genl_data_mutex); |
830 | } | |
831 | ||
832 | void nfc_genl_data_exit(struct nfc_genl_data *genl_data) | |
833 | { | |
834 | mutex_destroy(&genl_data->genl_data_mutex); | |
835 | } | |
836 | ||
837 | static struct notifier_block nl_notifier = { | |
838 | .notifier_call = nfc_genl_rcv_nl_event, | |
839 | }; | |
840 | ||
841 | /** | |
842 | * nfc_genl_init() - Initialize netlink interface | |
843 | * | |
844 | * This initialization function registers the nfc netlink family. | |
845 | */ | |
846 | int __init nfc_genl_init(void) | |
847 | { | |
848 | int rc; | |
849 | ||
850 | rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops, | |
0a40acb2 | 851 | ARRAY_SIZE(nfc_genl_ops)); |
4d12b8b1 LRV |
852 | if (rc) |
853 | return rc; | |
854 | ||
855 | rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp); | |
856 | ||
857 | netlink_register_notifier(&nl_notifier); | |
858 | ||
859 | return rc; | |
860 | } | |
861 | ||
862 | /** | |
863 | * nfc_genl_exit() - Deinitialize netlink interface | |
864 | * | |
865 | * This exit function unregisters the nfc netlink family. | |
866 | */ | |
867 | void nfc_genl_exit(void) | |
868 | { | |
869 | netlink_unregister_notifier(&nl_notifier); | |
870 | genl_unregister_family(&nfc_genl_family); | |
871 | } |