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 | ||
52feb444 TE |
32 | #include "llcp/llcp.h" |
33 | ||
4d12b8b1 LRV |
34 | static struct genl_multicast_group nfc_genl_event_mcgrp = { |
35 | .name = NFC_GENL_MCAST_EVENT_NAME, | |
36 | }; | |
37 | ||
e5fe4cf8 | 38 | static struct genl_family nfc_genl_family = { |
4d12b8b1 LRV |
39 | .id = GENL_ID_GENERATE, |
40 | .hdrsize = 0, | |
41 | .name = NFC_GENL_NAME, | |
42 | .version = NFC_GENL_VERSION, | |
43 | .maxattr = NFC_ATTR_MAX, | |
44 | }; | |
45 | ||
46 | static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = { | |
47 | [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 }, | |
48 | [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING, | |
49 | .len = NFC_DEVICE_NAME_MAXSIZE }, | |
50 | [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 }, | |
1ed28f61 SO |
51 | [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 }, |
52 | [NFC_ATTR_RF_MODE] = { .type = NLA_U8 }, | |
c970a1ac | 53 | [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 }, |
fe7c5800 SO |
54 | [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 }, |
55 | [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 }, | |
4d12b8b1 LRV |
56 | }; |
57 | ||
58 | static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target, | |
0a40acb2 | 59 | struct netlink_callback *cb, int flags) |
4d12b8b1 LRV |
60 | { |
61 | void *hdr; | |
62 | ||
15e47304 | 63 | hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
0a40acb2 | 64 | &nfc_genl_family, flags, NFC_CMD_GET_TARGET); |
4d12b8b1 LRV |
65 | if (!hdr) |
66 | return -EMSGSIZE; | |
67 | ||
68 | genl_dump_check_consistent(cb, hdr, &nfc_genl_family); | |
69 | ||
1e6428d8 DM |
70 | if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) || |
71 | nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) || | |
72 | nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) || | |
73 | nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res)) | |
74 | goto nla_put_failure; | |
75 | if (target->nfcid1_len > 0 && | |
76 | nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len, | |
77 | target->nfcid1)) | |
78 | goto nla_put_failure; | |
79 | if (target->sensb_res_len > 0 && | |
80 | nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len, | |
81 | target->sensb_res)) | |
82 | goto nla_put_failure; | |
83 | if (target->sensf_res_len > 0 && | |
84 | nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len, | |
85 | target->sensf_res)) | |
86 | goto nla_put_failure; | |
4d12b8b1 LRV |
87 | |
88 | return genlmsg_end(msg, hdr); | |
89 | ||
90 | nla_put_failure: | |
91 | genlmsg_cancel(msg, hdr); | |
92 | return -EMSGSIZE; | |
93 | } | |
94 | ||
95 | static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb) | |
96 | { | |
97 | struct nfc_dev *dev; | |
98 | int rc; | |
99 | u32 idx; | |
100 | ||
101 | rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize, | |
0a40acb2 SO |
102 | nfc_genl_family.attrbuf, |
103 | nfc_genl_family.maxattr, | |
104 | nfc_genl_policy); | |
4d12b8b1 LRV |
105 | if (rc < 0) |
106 | return ERR_PTR(rc); | |
107 | ||
108 | if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]) | |
109 | return ERR_PTR(-EINVAL); | |
110 | ||
111 | idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]); | |
112 | ||
113 | dev = nfc_get_device(idx); | |
114 | if (!dev) | |
115 | return ERR_PTR(-ENODEV); | |
116 | ||
117 | return dev; | |
118 | } | |
119 | ||
120 | static int nfc_genl_dump_targets(struct sk_buff *skb, | |
0a40acb2 | 121 | struct netlink_callback *cb) |
4d12b8b1 LRV |
122 | { |
123 | int i = cb->args[0]; | |
124 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
125 | int rc; | |
126 | ||
4d12b8b1 LRV |
127 | if (!dev) { |
128 | dev = __get_device_from_cb(cb); | |
129 | if (IS_ERR(dev)) | |
130 | return PTR_ERR(dev); | |
131 | ||
132 | cb->args[1] = (long) dev; | |
133 | } | |
134 | ||
d4ccb132 | 135 | device_lock(&dev->dev); |
4d12b8b1 LRV |
136 | |
137 | cb->seq = dev->targets_generation; | |
138 | ||
139 | while (i < dev->n_targets) { | |
140 | rc = nfc_genl_send_target(skb, &dev->targets[i], cb, | |
0a40acb2 | 141 | NLM_F_MULTI); |
4d12b8b1 LRV |
142 | if (rc < 0) |
143 | break; | |
144 | ||
145 | i++; | |
146 | } | |
147 | ||
d4ccb132 | 148 | device_unlock(&dev->dev); |
4d12b8b1 LRV |
149 | |
150 | cb->args[0] = i; | |
151 | ||
152 | return skb->len; | |
153 | } | |
154 | ||
155 | static int nfc_genl_dump_targets_done(struct netlink_callback *cb) | |
156 | { | |
157 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
158 | ||
4d12b8b1 LRV |
159 | if (dev) |
160 | nfc_put_device(dev); | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | int nfc_genl_targets_found(struct nfc_dev *dev) | |
166 | { | |
167 | struct sk_buff *msg; | |
168 | void *hdr; | |
169 | ||
15e47304 | 170 | dev->genl_data.poll_req_portid = 0; |
4d12b8b1 | 171 | |
58050fce | 172 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
4d12b8b1 LRV |
173 | if (!msg) |
174 | return -ENOMEM; | |
175 | ||
176 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 177 | NFC_EVENT_TARGETS_FOUND); |
4d12b8b1 LRV |
178 | if (!hdr) |
179 | goto free_msg; | |
180 | ||
1e6428d8 DM |
181 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
182 | goto nla_put_failure; | |
4d12b8b1 LRV |
183 | |
184 | genlmsg_end(msg, hdr); | |
185 | ||
186 | return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
187 | ||
188 | nla_put_failure: | |
189 | genlmsg_cancel(msg, hdr); | |
190 | free_msg: | |
191 | nlmsg_free(msg); | |
192 | return -EMSGSIZE; | |
193 | } | |
194 | ||
8112a5c9 SO |
195 | int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx) |
196 | { | |
197 | struct sk_buff *msg; | |
198 | void *hdr; | |
199 | ||
58050fce | 200 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
8112a5c9 SO |
201 | if (!msg) |
202 | return -ENOMEM; | |
203 | ||
204 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
205 | NFC_EVENT_TARGET_LOST); | |
206 | if (!hdr) | |
207 | goto free_msg; | |
208 | ||
59ef43e6 JL |
209 | if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
210 | nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx)) | |
211 | goto nla_put_failure; | |
8112a5c9 SO |
212 | |
213 | genlmsg_end(msg, hdr); | |
214 | ||
215 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
216 | ||
217 | return 0; | |
218 | ||
fc40a8c1 SO |
219 | nla_put_failure: |
220 | genlmsg_cancel(msg, hdr); | |
221 | free_msg: | |
222 | nlmsg_free(msg); | |
223 | return -EMSGSIZE; | |
224 | } | |
225 | ||
226 | int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol) | |
227 | { | |
228 | struct sk_buff *msg; | |
229 | void *hdr; | |
230 | ||
58050fce | 231 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
fc40a8c1 SO |
232 | if (!msg) |
233 | return -ENOMEM; | |
234 | ||
235 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
236 | NFC_EVENT_TM_ACTIVATED); | |
237 | if (!hdr) | |
238 | goto free_msg; | |
239 | ||
240 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) | |
241 | goto nla_put_failure; | |
242 | if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol)) | |
243 | goto nla_put_failure; | |
244 | ||
245 | genlmsg_end(msg, hdr); | |
246 | ||
247 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
248 | ||
249 | return 0; | |
250 | ||
251 | nla_put_failure: | |
252 | genlmsg_cancel(msg, hdr); | |
253 | free_msg: | |
254 | nlmsg_free(msg); | |
255 | return -EMSGSIZE; | |
256 | } | |
257 | ||
258 | int nfc_genl_tm_deactivated(struct nfc_dev *dev) | |
259 | { | |
260 | struct sk_buff *msg; | |
261 | void *hdr; | |
262 | ||
58050fce | 263 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
fc40a8c1 SO |
264 | if (!msg) |
265 | return -ENOMEM; | |
266 | ||
267 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
268 | NFC_EVENT_TM_DEACTIVATED); | |
269 | if (!hdr) | |
270 | goto free_msg; | |
271 | ||
272 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) | |
273 | goto nla_put_failure; | |
274 | ||
275 | genlmsg_end(msg, hdr); | |
276 | ||
277 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
278 | ||
279 | return 0; | |
280 | ||
8112a5c9 SO |
281 | nla_put_failure: |
282 | genlmsg_cancel(msg, hdr); | |
283 | free_msg: | |
284 | nlmsg_free(msg); | |
285 | return -EMSGSIZE; | |
286 | } | |
287 | ||
4d12b8b1 LRV |
288 | int nfc_genl_device_added(struct nfc_dev *dev) |
289 | { | |
290 | struct sk_buff *msg; | |
291 | void *hdr; | |
292 | ||
58050fce | 293 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
4d12b8b1 LRV |
294 | if (!msg) |
295 | return -ENOMEM; | |
296 | ||
297 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 298 | NFC_EVENT_DEVICE_ADDED); |
4d12b8b1 LRV |
299 | if (!hdr) |
300 | goto free_msg; | |
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 | genlmsg_end(msg, hdr); | |
309 | ||
310 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
311 | ||
312 | return 0; | |
313 | ||
314 | nla_put_failure: | |
315 | genlmsg_cancel(msg, hdr); | |
316 | free_msg: | |
317 | nlmsg_free(msg); | |
318 | return -EMSGSIZE; | |
319 | } | |
320 | ||
321 | int nfc_genl_device_removed(struct nfc_dev *dev) | |
322 | { | |
323 | struct sk_buff *msg; | |
324 | void *hdr; | |
325 | ||
58050fce | 326 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
4d12b8b1 LRV |
327 | if (!msg) |
328 | return -ENOMEM; | |
329 | ||
330 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 331 | NFC_EVENT_DEVICE_REMOVED); |
4d12b8b1 LRV |
332 | if (!hdr) |
333 | goto free_msg; | |
334 | ||
1e6428d8 DM |
335 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
336 | goto nla_put_failure; | |
4d12b8b1 LRV |
337 | |
338 | genlmsg_end(msg, hdr); | |
339 | ||
340 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
341 | ||
342 | return 0; | |
343 | ||
344 | nla_put_failure: | |
345 | genlmsg_cancel(msg, hdr); | |
346 | free_msg: | |
347 | nlmsg_free(msg); | |
348 | return -EMSGSIZE; | |
349 | } | |
350 | ||
351 | static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev, | |
15e47304 | 352 | u32 portid, u32 seq, |
0a40acb2 SO |
353 | struct netlink_callback *cb, |
354 | int flags) | |
4d12b8b1 LRV |
355 | { |
356 | void *hdr; | |
357 | ||
15e47304 | 358 | hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags, |
0a40acb2 | 359 | NFC_CMD_GET_DEVICE); |
4d12b8b1 LRV |
360 | if (!hdr) |
361 | return -EMSGSIZE; | |
362 | ||
363 | if (cb) | |
364 | genl_dump_check_consistent(cb, hdr, &nfc_genl_family); | |
365 | ||
1e6428d8 DM |
366 | if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
367 | nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || | |
368 | nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) || | |
390a1bd8 | 369 | nla_put_u32(msg, NFC_ATTR_SE, dev->supported_se) || |
7ad39395 TE |
370 | nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) || |
371 | nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode)) | |
1e6428d8 | 372 | goto nla_put_failure; |
4d12b8b1 LRV |
373 | |
374 | return genlmsg_end(msg, hdr); | |
375 | ||
376 | nla_put_failure: | |
377 | genlmsg_cancel(msg, hdr); | |
378 | return -EMSGSIZE; | |
379 | } | |
380 | ||
381 | static int nfc_genl_dump_devices(struct sk_buff *skb, | |
0a40acb2 | 382 | struct netlink_callback *cb) |
4d12b8b1 LRV |
383 | { |
384 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
385 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
386 | bool first_call = false; | |
387 | ||
4d12b8b1 LRV |
388 | if (!iter) { |
389 | first_call = true; | |
390 | iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL); | |
391 | if (!iter) | |
392 | return -ENOMEM; | |
393 | cb->args[0] = (long) iter; | |
394 | } | |
395 | ||
396 | mutex_lock(&nfc_devlist_mutex); | |
397 | ||
398 | cb->seq = nfc_devlist_generation; | |
399 | ||
400 | if (first_call) { | |
401 | nfc_device_iter_init(iter); | |
402 | dev = nfc_device_iter_next(iter); | |
403 | } | |
404 | ||
405 | while (dev) { | |
406 | int rc; | |
407 | ||
15e47304 | 408 | rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid, |
0a40acb2 | 409 | cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); |
4d12b8b1 LRV |
410 | if (rc < 0) |
411 | break; | |
412 | ||
413 | dev = nfc_device_iter_next(iter); | |
414 | } | |
415 | ||
416 | mutex_unlock(&nfc_devlist_mutex); | |
417 | ||
418 | cb->args[1] = (long) dev; | |
419 | ||
420 | return skb->len; | |
421 | } | |
422 | ||
423 | static int nfc_genl_dump_devices_done(struct netlink_callback *cb) | |
424 | { | |
425 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
426 | ||
4d12b8b1 LRV |
427 | nfc_device_iter_exit(iter); |
428 | kfree(iter); | |
429 | ||
430 | return 0; | |
431 | } | |
432 | ||
1ed28f61 | 433 | int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx, |
0a40acb2 | 434 | u8 comm_mode, u8 rf_mode) |
1ed28f61 SO |
435 | { |
436 | struct sk_buff *msg; | |
437 | void *hdr; | |
438 | ||
439 | pr_debug("DEP link is up\n"); | |
440 | ||
58050fce | 441 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1ed28f61 SO |
442 | if (!msg) |
443 | return -ENOMEM; | |
444 | ||
0a40acb2 | 445 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP); |
1ed28f61 SO |
446 | if (!hdr) |
447 | goto free_msg; | |
448 | ||
1e6428d8 DM |
449 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
450 | goto nla_put_failure; | |
451 | if (rf_mode == NFC_RF_INITIATOR && | |
452 | nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx)) | |
453 | goto nla_put_failure; | |
454 | if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) || | |
455 | nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode)) | |
456 | goto nla_put_failure; | |
1ed28f61 SO |
457 | |
458 | genlmsg_end(msg, hdr); | |
459 | ||
460 | dev->dep_link_up = true; | |
461 | ||
462 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
463 | ||
464 | return 0; | |
465 | ||
466 | nla_put_failure: | |
467 | genlmsg_cancel(msg, hdr); | |
468 | free_msg: | |
469 | nlmsg_free(msg); | |
470 | return -EMSGSIZE; | |
471 | } | |
472 | ||
473 | int nfc_genl_dep_link_down_event(struct nfc_dev *dev) | |
474 | { | |
475 | struct sk_buff *msg; | |
476 | void *hdr; | |
477 | ||
478 | pr_debug("DEP link is down\n"); | |
479 | ||
58050fce | 480 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1ed28f61 SO |
481 | if (!msg) |
482 | return -ENOMEM; | |
483 | ||
484 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 485 | NFC_CMD_DEP_LINK_DOWN); |
1ed28f61 SO |
486 | if (!hdr) |
487 | goto free_msg; | |
488 | ||
1e6428d8 DM |
489 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
490 | goto nla_put_failure; | |
1ed28f61 SO |
491 | |
492 | genlmsg_end(msg, hdr); | |
493 | ||
494 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
495 | ||
496 | return 0; | |
497 | ||
498 | nla_put_failure: | |
499 | genlmsg_cancel(msg, hdr); | |
500 | free_msg: | |
501 | nlmsg_free(msg); | |
502 | return -EMSGSIZE; | |
503 | } | |
504 | ||
4d12b8b1 LRV |
505 | static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info) |
506 | { | |
507 | struct sk_buff *msg; | |
508 | struct nfc_dev *dev; | |
509 | u32 idx; | |
510 | int rc = -ENOBUFS; | |
511 | ||
4d12b8b1 LRV |
512 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
513 | return -EINVAL; | |
514 | ||
515 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
516 | ||
517 | dev = nfc_get_device(idx); | |
518 | if (!dev) | |
519 | return -ENODEV; | |
520 | ||
58050fce | 521 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
4d12b8b1 LRV |
522 | if (!msg) { |
523 | rc = -ENOMEM; | |
524 | goto out_putdev; | |
525 | } | |
526 | ||
15e47304 | 527 | rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq, |
0a40acb2 | 528 | NULL, 0); |
4d12b8b1 LRV |
529 | if (rc < 0) |
530 | goto out_free; | |
531 | ||
532 | nfc_put_device(dev); | |
533 | ||
534 | return genlmsg_reply(msg, info); | |
535 | ||
536 | out_free: | |
537 | nlmsg_free(msg); | |
538 | out_putdev: | |
539 | nfc_put_device(dev); | |
540 | return rc; | |
541 | } | |
542 | ||
8b3fe7b5 IE |
543 | static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info) |
544 | { | |
545 | struct nfc_dev *dev; | |
546 | int rc; | |
547 | u32 idx; | |
548 | ||
8b3fe7b5 IE |
549 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
550 | return -EINVAL; | |
551 | ||
552 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
553 | ||
554 | dev = nfc_get_device(idx); | |
555 | if (!dev) | |
556 | return -ENODEV; | |
557 | ||
558 | rc = nfc_dev_up(dev); | |
559 | ||
560 | nfc_put_device(dev); | |
561 | return rc; | |
562 | } | |
563 | ||
564 | static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info) | |
565 | { | |
566 | struct nfc_dev *dev; | |
567 | int rc; | |
568 | u32 idx; | |
569 | ||
8b3fe7b5 IE |
570 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
571 | return -EINVAL; | |
572 | ||
573 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
574 | ||
575 | dev = nfc_get_device(idx); | |
576 | if (!dev) | |
577 | return -ENODEV; | |
578 | ||
579 | rc = nfc_dev_down(dev); | |
580 | ||
581 | nfc_put_device(dev); | |
582 | return rc; | |
583 | } | |
584 | ||
4d12b8b1 LRV |
585 | static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info) |
586 | { | |
587 | struct nfc_dev *dev; | |
588 | int rc; | |
589 | u32 idx; | |
fe7c5800 | 590 | u32 im_protocols = 0, tm_protocols = 0; |
4d12b8b1 | 591 | |
1ed28f61 SO |
592 | pr_debug("Poll start\n"); |
593 | ||
4d12b8b1 | 594 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
fe7c5800 SO |
595 | ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] && |
596 | !info->attrs[NFC_ATTR_PROTOCOLS]) && | |
0f450772 | 597 | !info->attrs[NFC_ATTR_TM_PROTOCOLS])) |
4d12b8b1 LRV |
598 | return -EINVAL; |
599 | ||
600 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
fe7c5800 SO |
601 | |
602 | if (info->attrs[NFC_ATTR_TM_PROTOCOLS]) | |
603 | tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]); | |
fe7c5800 SO |
604 | |
605 | if (info->attrs[NFC_ATTR_IM_PROTOCOLS]) | |
606 | im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]); | |
5e50ee3a SO |
607 | else if (info->attrs[NFC_ATTR_PROTOCOLS]) |
608 | im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); | |
4d12b8b1 LRV |
609 | |
610 | dev = nfc_get_device(idx); | |
611 | if (!dev) | |
612 | return -ENODEV; | |
613 | ||
614 | mutex_lock(&dev->genl_data.genl_data_mutex); | |
615 | ||
fe7c5800 | 616 | rc = nfc_start_poll(dev, im_protocols, tm_protocols); |
4d12b8b1 | 617 | if (!rc) |
15e47304 | 618 | dev->genl_data.poll_req_portid = info->snd_portid; |
4d12b8b1 LRV |
619 | |
620 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
621 | ||
622 | nfc_put_device(dev); | |
623 | return rc; | |
624 | } | |
625 | ||
626 | static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info) | |
627 | { | |
628 | struct nfc_dev *dev; | |
629 | int rc; | |
630 | u32 idx; | |
631 | ||
4d12b8b1 LRV |
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 | ||
a831b913 SO |
641 | device_lock(&dev->dev); |
642 | ||
643 | if (!dev->polling) { | |
644 | device_unlock(&dev->dev); | |
645 | return -EINVAL; | |
646 | } | |
647 | ||
648 | device_unlock(&dev->dev); | |
649 | ||
4d12b8b1 LRV |
650 | mutex_lock(&dev->genl_data.genl_data_mutex); |
651 | ||
15e47304 | 652 | if (dev->genl_data.poll_req_portid != info->snd_portid) { |
4d12b8b1 LRV |
653 | rc = -EBUSY; |
654 | goto out; | |
655 | } | |
656 | ||
657 | rc = nfc_stop_poll(dev); | |
15e47304 | 658 | dev->genl_data.poll_req_portid = 0; |
4d12b8b1 LRV |
659 | |
660 | out: | |
661 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
662 | nfc_put_device(dev); | |
663 | return rc; | |
664 | } | |
665 | ||
1ed28f61 SO |
666 | static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info) |
667 | { | |
668 | struct nfc_dev *dev; | |
669 | int rc, tgt_idx; | |
670 | u32 idx; | |
47807d3d | 671 | u8 comm; |
1ed28f61 SO |
672 | |
673 | pr_debug("DEP link up\n"); | |
674 | ||
675 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
47807d3d | 676 | !info->attrs[NFC_ATTR_COMM_MODE]) |
1ed28f61 SO |
677 | return -EINVAL; |
678 | ||
679 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
680 | if (!info->attrs[NFC_ATTR_TARGET_INDEX]) | |
681 | tgt_idx = NFC_TARGET_IDX_ANY; | |
682 | else | |
683 | tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); | |
684 | ||
685 | comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]); | |
1ed28f61 SO |
686 | |
687 | if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE) | |
688 | return -EINVAL; | |
689 | ||
1ed28f61 SO |
690 | dev = nfc_get_device(idx); |
691 | if (!dev) | |
692 | return -ENODEV; | |
693 | ||
47807d3d | 694 | rc = nfc_dep_link_up(dev, tgt_idx, comm); |
1ed28f61 SO |
695 | |
696 | nfc_put_device(dev); | |
697 | ||
698 | return rc; | |
699 | } | |
700 | ||
701 | static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) | |
702 | { | |
703 | struct nfc_dev *dev; | |
704 | int rc; | |
705 | u32 idx; | |
706 | ||
707 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) | |
708 | return -EINVAL; | |
709 | ||
710 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
711 | ||
712 | dev = nfc_get_device(idx); | |
713 | if (!dev) | |
714 | return -ENODEV; | |
715 | ||
716 | rc = nfc_dep_link_down(dev); | |
717 | ||
718 | nfc_put_device(dev); | |
719 | return rc; | |
720 | } | |
721 | ||
52feb444 TE |
722 | static int nfc_genl_send_params(struct sk_buff *msg, |
723 | struct nfc_llcp_local *local, | |
724 | u32 portid, u32 seq) | |
725 | { | |
726 | void *hdr; | |
727 | ||
728 | hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0, | |
729 | NFC_CMD_LLC_GET_PARAMS); | |
730 | if (!hdr) | |
731 | return -EMSGSIZE; | |
732 | ||
733 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) || | |
734 | nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) || | |
735 | nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) || | |
736 | nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux))) | |
737 | goto nla_put_failure; | |
738 | ||
739 | return genlmsg_end(msg, hdr); | |
740 | ||
741 | nla_put_failure: | |
742 | ||
743 | genlmsg_cancel(msg, hdr); | |
744 | return -EMSGSIZE; | |
745 | } | |
746 | ||
747 | static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info) | |
748 | { | |
749 | struct nfc_dev *dev; | |
750 | struct nfc_llcp_local *local; | |
751 | int rc = 0; | |
752 | struct sk_buff *msg = NULL; | |
753 | u32 idx; | |
754 | ||
755 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) | |
756 | return -EINVAL; | |
757 | ||
758 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
759 | ||
760 | dev = nfc_get_device(idx); | |
761 | if (!dev) | |
762 | return -ENODEV; | |
763 | ||
764 | device_lock(&dev->dev); | |
765 | ||
766 | local = nfc_llcp_find_local(dev); | |
767 | if (!local) { | |
768 | rc = -ENODEV; | |
769 | goto exit; | |
770 | } | |
771 | ||
772 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
773 | if (!msg) { | |
774 | rc = -ENOMEM; | |
775 | goto exit; | |
776 | } | |
777 | ||
778 | rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq); | |
779 | ||
780 | exit: | |
781 | device_unlock(&dev->dev); | |
782 | ||
783 | nfc_put_device(dev); | |
784 | ||
785 | if (rc < 0) { | |
786 | if (msg) | |
787 | nlmsg_free(msg); | |
788 | ||
789 | return rc; | |
790 | } | |
791 | ||
792 | return genlmsg_reply(msg, info); | |
793 | } | |
794 | ||
795 | static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info) | |
796 | { | |
797 | struct nfc_dev *dev; | |
798 | struct nfc_llcp_local *local; | |
799 | u8 rw = 0; | |
800 | u16 miux = 0; | |
801 | u32 idx; | |
802 | int rc = 0; | |
803 | ||
804 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
805 | (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] && | |
806 | !info->attrs[NFC_ATTR_LLC_PARAM_RW] && | |
807 | !info->attrs[NFC_ATTR_LLC_PARAM_MIUX])) | |
808 | return -EINVAL; | |
809 | ||
810 | if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) { | |
811 | rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]); | |
812 | ||
813 | if (rw > LLCP_MAX_RW) | |
814 | return -EINVAL; | |
815 | } | |
816 | ||
817 | if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) { | |
818 | miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]); | |
819 | ||
820 | if (miux > LLCP_MAX_MIUX) | |
821 | return -EINVAL; | |
822 | } | |
823 | ||
824 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
825 | ||
826 | dev = nfc_get_device(idx); | |
827 | if (!dev) | |
828 | return -ENODEV; | |
829 | ||
830 | device_lock(&dev->dev); | |
831 | ||
832 | local = nfc_llcp_find_local(dev); | |
833 | if (!local) { | |
834 | nfc_put_device(dev); | |
835 | rc = -ENODEV; | |
836 | goto exit; | |
837 | } | |
838 | ||
839 | if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) { | |
840 | if (dev->dep_link_up) { | |
841 | rc = -EINPROGRESS; | |
842 | goto exit; | |
843 | } | |
844 | ||
845 | local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]); | |
846 | } | |
847 | ||
848 | if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) | |
849 | local->rw = rw; | |
850 | ||
851 | if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) | |
852 | local->miux = cpu_to_be16(miux); | |
853 | ||
854 | exit: | |
855 | device_unlock(&dev->dev); | |
856 | ||
857 | nfc_put_device(dev); | |
858 | ||
859 | return rc; | |
860 | } | |
861 | ||
4d12b8b1 LRV |
862 | static struct genl_ops nfc_genl_ops[] = { |
863 | { | |
864 | .cmd = NFC_CMD_GET_DEVICE, | |
865 | .doit = nfc_genl_get_device, | |
866 | .dumpit = nfc_genl_dump_devices, | |
867 | .done = nfc_genl_dump_devices_done, | |
868 | .policy = nfc_genl_policy, | |
8b3fe7b5 IE |
869 | }, |
870 | { | |
871 | .cmd = NFC_CMD_DEV_UP, | |
872 | .doit = nfc_genl_dev_up, | |
873 | .policy = nfc_genl_policy, | |
874 | }, | |
875 | { | |
876 | .cmd = NFC_CMD_DEV_DOWN, | |
877 | .doit = nfc_genl_dev_down, | |
878 | .policy = nfc_genl_policy, | |
4d12b8b1 LRV |
879 | }, |
880 | { | |
881 | .cmd = NFC_CMD_START_POLL, | |
882 | .doit = nfc_genl_start_poll, | |
883 | .policy = nfc_genl_policy, | |
884 | }, | |
885 | { | |
886 | .cmd = NFC_CMD_STOP_POLL, | |
887 | .doit = nfc_genl_stop_poll, | |
888 | .policy = nfc_genl_policy, | |
889 | }, | |
1ed28f61 SO |
890 | { |
891 | .cmd = NFC_CMD_DEP_LINK_UP, | |
892 | .doit = nfc_genl_dep_link_up, | |
893 | .policy = nfc_genl_policy, | |
894 | }, | |
895 | { | |
896 | .cmd = NFC_CMD_DEP_LINK_DOWN, | |
897 | .doit = nfc_genl_dep_link_down, | |
898 | .policy = nfc_genl_policy, | |
899 | }, | |
4d12b8b1 LRV |
900 | { |
901 | .cmd = NFC_CMD_GET_TARGET, | |
902 | .dumpit = nfc_genl_dump_targets, | |
903 | .done = nfc_genl_dump_targets_done, | |
904 | .policy = nfc_genl_policy, | |
905 | }, | |
52feb444 TE |
906 | { |
907 | .cmd = NFC_CMD_LLC_GET_PARAMS, | |
908 | .doit = nfc_genl_llc_get_params, | |
909 | .policy = nfc_genl_policy, | |
910 | }, | |
911 | { | |
912 | .cmd = NFC_CMD_LLC_SET_PARAMS, | |
913 | .doit = nfc_genl_llc_set_params, | |
914 | .policy = nfc_genl_policy, | |
915 | }, | |
4d12b8b1 LRV |
916 | }; |
917 | ||
3c0cc8aa SJ |
918 | |
919 | struct urelease_work { | |
920 | struct work_struct w; | |
c487606f | 921 | int portid; |
3c0cc8aa SJ |
922 | }; |
923 | ||
924 | static void nfc_urelease_event_work(struct work_struct *work) | |
4d12b8b1 | 925 | { |
3c0cc8aa | 926 | struct urelease_work *w = container_of(work, struct urelease_work, w); |
4d12b8b1 LRV |
927 | struct class_dev_iter iter; |
928 | struct nfc_dev *dev; | |
929 | ||
c487606f | 930 | pr_debug("portid %d\n", w->portid); |
4d12b8b1 | 931 | |
3c0cc8aa | 932 | mutex_lock(&nfc_devlist_mutex); |
4d12b8b1 LRV |
933 | |
934 | nfc_device_iter_init(&iter); | |
935 | dev = nfc_device_iter_next(&iter); | |
936 | ||
937 | while (dev) { | |
3c0cc8aa SJ |
938 | mutex_lock(&dev->genl_data.genl_data_mutex); |
939 | ||
c487606f | 940 | if (dev->genl_data.poll_req_portid == w->portid) { |
4d12b8b1 | 941 | nfc_stop_poll(dev); |
15e47304 | 942 | dev->genl_data.poll_req_portid = 0; |
4d12b8b1 | 943 | } |
3c0cc8aa SJ |
944 | |
945 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
946 | ||
4d12b8b1 LRV |
947 | dev = nfc_device_iter_next(&iter); |
948 | } | |
949 | ||
950 | nfc_device_iter_exit(&iter); | |
951 | ||
3c0cc8aa SJ |
952 | mutex_unlock(&nfc_devlist_mutex); |
953 | ||
954 | kfree(w); | |
955 | } | |
956 | ||
957 | static int nfc_genl_rcv_nl_event(struct notifier_block *this, | |
958 | unsigned long event, void *ptr) | |
959 | { | |
960 | struct netlink_notify *n = ptr; | |
961 | struct urelease_work *w; | |
962 | ||
963 | if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC) | |
964 | goto out; | |
965 | ||
c487606f | 966 | pr_debug("NETLINK_URELEASE event from id %d\n", n->portid); |
3c0cc8aa SJ |
967 | |
968 | w = kmalloc(sizeof(*w), GFP_ATOMIC); | |
969 | if (w) { | |
970 | INIT_WORK((struct work_struct *) w, nfc_urelease_event_work); | |
c487606f | 971 | w->portid = n->portid; |
3c0cc8aa SJ |
972 | schedule_work((struct work_struct *) w); |
973 | } | |
974 | ||
4d12b8b1 LRV |
975 | out: |
976 | return NOTIFY_DONE; | |
977 | } | |
978 | ||
979 | void nfc_genl_data_init(struct nfc_genl_data *genl_data) | |
980 | { | |
15e47304 | 981 | genl_data->poll_req_portid = 0; |
4d12b8b1 LRV |
982 | mutex_init(&genl_data->genl_data_mutex); |
983 | } | |
984 | ||
985 | void nfc_genl_data_exit(struct nfc_genl_data *genl_data) | |
986 | { | |
987 | mutex_destroy(&genl_data->genl_data_mutex); | |
988 | } | |
989 | ||
990 | static struct notifier_block nl_notifier = { | |
991 | .notifier_call = nfc_genl_rcv_nl_event, | |
992 | }; | |
993 | ||
994 | /** | |
995 | * nfc_genl_init() - Initialize netlink interface | |
996 | * | |
997 | * This initialization function registers the nfc netlink family. | |
998 | */ | |
999 | int __init nfc_genl_init(void) | |
1000 | { | |
1001 | int rc; | |
1002 | ||
1003 | rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops, | |
0a40acb2 | 1004 | ARRAY_SIZE(nfc_genl_ops)); |
4d12b8b1 LRV |
1005 | if (rc) |
1006 | return rc; | |
1007 | ||
1008 | rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp); | |
1009 | ||
1010 | netlink_register_notifier(&nl_notifier); | |
1011 | ||
1012 | return rc; | |
1013 | } | |
1014 | ||
1015 | /** | |
1016 | * nfc_genl_exit() - Deinitialize netlink interface | |
1017 | * | |
1018 | * This exit function unregisters the nfc netlink family. | |
1019 | */ | |
1020 | void nfc_genl_exit(void) | |
1021 | { | |
1022 | netlink_unregister_notifier(&nl_notifier); | |
1023 | genl_unregister_family(&nfc_genl_family); | |
1024 | } |