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" | |
30cc4587 | 31 | #include "llcp.h" |
52feb444 | 32 | |
4d12b8b1 LRV |
33 | static struct genl_multicast_group nfc_genl_event_mcgrp = { |
34 | .name = NFC_GENL_MCAST_EVENT_NAME, | |
35 | }; | |
36 | ||
e5fe4cf8 | 37 | static struct genl_family nfc_genl_family = { |
4d12b8b1 LRV |
38 | .id = GENL_ID_GENERATE, |
39 | .hdrsize = 0, | |
40 | .name = NFC_GENL_NAME, | |
41 | .version = NFC_GENL_VERSION, | |
42 | .maxattr = NFC_ATTR_MAX, | |
43 | }; | |
44 | ||
45 | static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = { | |
46 | [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 }, | |
47 | [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING, | |
48 | .len = NFC_DEVICE_NAME_MAXSIZE }, | |
49 | [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 }, | |
1ed28f61 SO |
50 | [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 }, |
51 | [NFC_ATTR_RF_MODE] = { .type = NLA_U8 }, | |
c970a1ac | 52 | [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 }, |
fe7c5800 SO |
53 | [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 }, |
54 | [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 }, | |
8af362d1 TE |
55 | [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 }, |
56 | [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 }, | |
57 | [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 }, | |
d9b8d8e1 TE |
58 | [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED }, |
59 | }; | |
60 | ||
61 | static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = { | |
62 | [NFC_SDP_ATTR_URI] = { .type = NLA_STRING }, | |
63 | [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 }, | |
4d12b8b1 LRV |
64 | }; |
65 | ||
66 | static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target, | |
0a40acb2 | 67 | struct netlink_callback *cb, int flags) |
4d12b8b1 LRV |
68 | { |
69 | void *hdr; | |
70 | ||
15e47304 | 71 | hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
0a40acb2 | 72 | &nfc_genl_family, flags, NFC_CMD_GET_TARGET); |
4d12b8b1 LRV |
73 | if (!hdr) |
74 | return -EMSGSIZE; | |
75 | ||
76 | genl_dump_check_consistent(cb, hdr, &nfc_genl_family); | |
77 | ||
1e6428d8 DM |
78 | if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) || |
79 | nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) || | |
80 | nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) || | |
81 | nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res)) | |
82 | goto nla_put_failure; | |
83 | if (target->nfcid1_len > 0 && | |
84 | nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len, | |
85 | target->nfcid1)) | |
86 | goto nla_put_failure; | |
87 | if (target->sensb_res_len > 0 && | |
88 | nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len, | |
89 | target->sensb_res)) | |
90 | goto nla_put_failure; | |
91 | if (target->sensf_res_len > 0 && | |
92 | nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len, | |
93 | target->sensf_res)) | |
94 | goto nla_put_failure; | |
4d12b8b1 LRV |
95 | |
96 | return genlmsg_end(msg, hdr); | |
97 | ||
98 | nla_put_failure: | |
99 | genlmsg_cancel(msg, hdr); | |
100 | return -EMSGSIZE; | |
101 | } | |
102 | ||
103 | static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb) | |
104 | { | |
105 | struct nfc_dev *dev; | |
106 | int rc; | |
107 | u32 idx; | |
108 | ||
109 | rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize, | |
0a40acb2 SO |
110 | nfc_genl_family.attrbuf, |
111 | nfc_genl_family.maxattr, | |
112 | nfc_genl_policy); | |
4d12b8b1 LRV |
113 | if (rc < 0) |
114 | return ERR_PTR(rc); | |
115 | ||
116 | if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]) | |
117 | return ERR_PTR(-EINVAL); | |
118 | ||
119 | idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]); | |
120 | ||
121 | dev = nfc_get_device(idx); | |
122 | if (!dev) | |
123 | return ERR_PTR(-ENODEV); | |
124 | ||
125 | return dev; | |
126 | } | |
127 | ||
128 | static int nfc_genl_dump_targets(struct sk_buff *skb, | |
0a40acb2 | 129 | struct netlink_callback *cb) |
4d12b8b1 LRV |
130 | { |
131 | int i = cb->args[0]; | |
132 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
133 | int rc; | |
134 | ||
4d12b8b1 LRV |
135 | if (!dev) { |
136 | dev = __get_device_from_cb(cb); | |
137 | if (IS_ERR(dev)) | |
138 | return PTR_ERR(dev); | |
139 | ||
140 | cb->args[1] = (long) dev; | |
141 | } | |
142 | ||
d4ccb132 | 143 | device_lock(&dev->dev); |
4d12b8b1 LRV |
144 | |
145 | cb->seq = dev->targets_generation; | |
146 | ||
147 | while (i < dev->n_targets) { | |
148 | rc = nfc_genl_send_target(skb, &dev->targets[i], cb, | |
0a40acb2 | 149 | NLM_F_MULTI); |
4d12b8b1 LRV |
150 | if (rc < 0) |
151 | break; | |
152 | ||
153 | i++; | |
154 | } | |
155 | ||
d4ccb132 | 156 | device_unlock(&dev->dev); |
4d12b8b1 LRV |
157 | |
158 | cb->args[0] = i; | |
159 | ||
160 | return skb->len; | |
161 | } | |
162 | ||
163 | static int nfc_genl_dump_targets_done(struct netlink_callback *cb) | |
164 | { | |
165 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
166 | ||
4d12b8b1 LRV |
167 | if (dev) |
168 | nfc_put_device(dev); | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | int nfc_genl_targets_found(struct nfc_dev *dev) | |
174 | { | |
175 | struct sk_buff *msg; | |
176 | void *hdr; | |
177 | ||
15e47304 | 178 | dev->genl_data.poll_req_portid = 0; |
4d12b8b1 | 179 | |
58050fce | 180 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
4d12b8b1 LRV |
181 | if (!msg) |
182 | return -ENOMEM; | |
183 | ||
184 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 185 | NFC_EVENT_TARGETS_FOUND); |
4d12b8b1 LRV |
186 | if (!hdr) |
187 | goto free_msg; | |
188 | ||
1e6428d8 DM |
189 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
190 | goto nla_put_failure; | |
4d12b8b1 LRV |
191 | |
192 | genlmsg_end(msg, hdr); | |
193 | ||
194 | return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
195 | ||
196 | nla_put_failure: | |
197 | genlmsg_cancel(msg, hdr); | |
198 | free_msg: | |
199 | nlmsg_free(msg); | |
200 | return -EMSGSIZE; | |
201 | } | |
202 | ||
8112a5c9 SO |
203 | int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx) |
204 | { | |
205 | struct sk_buff *msg; | |
206 | void *hdr; | |
207 | ||
58050fce | 208 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
8112a5c9 SO |
209 | if (!msg) |
210 | return -ENOMEM; | |
211 | ||
212 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
213 | NFC_EVENT_TARGET_LOST); | |
214 | if (!hdr) | |
215 | goto free_msg; | |
216 | ||
59ef43e6 JL |
217 | if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
218 | nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx)) | |
219 | goto nla_put_failure; | |
8112a5c9 SO |
220 | |
221 | genlmsg_end(msg, hdr); | |
222 | ||
223 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
224 | ||
225 | return 0; | |
226 | ||
fc40a8c1 SO |
227 | nla_put_failure: |
228 | genlmsg_cancel(msg, hdr); | |
229 | free_msg: | |
230 | nlmsg_free(msg); | |
231 | return -EMSGSIZE; | |
232 | } | |
233 | ||
234 | int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol) | |
235 | { | |
236 | struct sk_buff *msg; | |
237 | void *hdr; | |
238 | ||
58050fce | 239 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
fc40a8c1 SO |
240 | if (!msg) |
241 | return -ENOMEM; | |
242 | ||
243 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
244 | NFC_EVENT_TM_ACTIVATED); | |
245 | if (!hdr) | |
246 | goto free_msg; | |
247 | ||
248 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) | |
249 | goto nla_put_failure; | |
250 | if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol)) | |
251 | goto nla_put_failure; | |
252 | ||
253 | genlmsg_end(msg, hdr); | |
254 | ||
255 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
256 | ||
257 | return 0; | |
258 | ||
259 | nla_put_failure: | |
260 | genlmsg_cancel(msg, hdr); | |
261 | free_msg: | |
262 | nlmsg_free(msg); | |
263 | return -EMSGSIZE; | |
264 | } | |
265 | ||
266 | int nfc_genl_tm_deactivated(struct nfc_dev *dev) | |
267 | { | |
268 | struct sk_buff *msg; | |
269 | void *hdr; | |
270 | ||
58050fce | 271 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
fc40a8c1 SO |
272 | if (!msg) |
273 | return -ENOMEM; | |
274 | ||
275 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
276 | NFC_EVENT_TM_DEACTIVATED); | |
277 | if (!hdr) | |
278 | goto free_msg; | |
279 | ||
280 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) | |
281 | goto nla_put_failure; | |
282 | ||
283 | genlmsg_end(msg, hdr); | |
284 | ||
285 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
286 | ||
287 | return 0; | |
288 | ||
8112a5c9 SO |
289 | nla_put_failure: |
290 | genlmsg_cancel(msg, hdr); | |
291 | free_msg: | |
292 | nlmsg_free(msg); | |
293 | return -EMSGSIZE; | |
294 | } | |
295 | ||
4d12b8b1 LRV |
296 | int nfc_genl_device_added(struct nfc_dev *dev) |
297 | { | |
298 | struct sk_buff *msg; | |
299 | void *hdr; | |
300 | ||
58050fce | 301 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
4d12b8b1 LRV |
302 | if (!msg) |
303 | return -ENOMEM; | |
304 | ||
305 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 306 | NFC_EVENT_DEVICE_ADDED); |
4d12b8b1 LRV |
307 | if (!hdr) |
308 | goto free_msg; | |
309 | ||
1e6428d8 DM |
310 | if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
311 | nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || | |
312 | nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) || | |
313 | nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up)) | |
314 | goto nla_put_failure; | |
4d12b8b1 LRV |
315 | |
316 | genlmsg_end(msg, hdr); | |
317 | ||
318 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
319 | ||
320 | return 0; | |
321 | ||
322 | nla_put_failure: | |
323 | genlmsg_cancel(msg, hdr); | |
324 | free_msg: | |
325 | nlmsg_free(msg); | |
326 | return -EMSGSIZE; | |
327 | } | |
328 | ||
329 | int nfc_genl_device_removed(struct nfc_dev *dev) | |
330 | { | |
331 | struct sk_buff *msg; | |
332 | void *hdr; | |
333 | ||
58050fce | 334 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
4d12b8b1 LRV |
335 | if (!msg) |
336 | return -ENOMEM; | |
337 | ||
338 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 339 | NFC_EVENT_DEVICE_REMOVED); |
4d12b8b1 LRV |
340 | if (!hdr) |
341 | goto free_msg; | |
342 | ||
1e6428d8 DM |
343 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
344 | goto nla_put_failure; | |
4d12b8b1 LRV |
345 | |
346 | genlmsg_end(msg, hdr); | |
347 | ||
348 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); | |
349 | ||
350 | return 0; | |
351 | ||
352 | nla_put_failure: | |
353 | genlmsg_cancel(msg, hdr); | |
354 | free_msg: | |
355 | nlmsg_free(msg); | |
356 | return -EMSGSIZE; | |
357 | } | |
358 | ||
d9b8d8e1 TE |
359 | int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list) |
360 | { | |
361 | struct sk_buff *msg; | |
362 | struct nlattr *sdp_attr, *uri_attr; | |
363 | struct nfc_llcp_sdp_tlv *sdres; | |
364 | struct hlist_node *n; | |
365 | void *hdr; | |
366 | int rc = -EMSGSIZE; | |
367 | int i; | |
368 | ||
369 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
370 | if (!msg) | |
371 | return -ENOMEM; | |
372 | ||
373 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
374 | NFC_EVENT_LLC_SDRES); | |
375 | if (!hdr) | |
376 | goto free_msg; | |
377 | ||
378 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) | |
379 | goto nla_put_failure; | |
380 | ||
381 | sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP); | |
382 | if (sdp_attr == NULL) { | |
383 | rc = -ENOMEM; | |
384 | goto nla_put_failure; | |
385 | } | |
386 | ||
387 | i = 1; | |
388 | hlist_for_each_entry_safe(sdres, n, sdres_list, node) { | |
389 | pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap); | |
390 | ||
391 | uri_attr = nla_nest_start(msg, i++); | |
392 | if (uri_attr == NULL) { | |
393 | rc = -ENOMEM; | |
394 | goto nla_put_failure; | |
395 | } | |
396 | ||
397 | if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap)) | |
398 | goto nla_put_failure; | |
399 | ||
400 | if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri)) | |
401 | goto nla_put_failure; | |
402 | ||
403 | nla_nest_end(msg, uri_attr); | |
404 | ||
405 | hlist_del(&sdres->node); | |
406 | ||
407 | nfc_llcp_free_sdp_tlv(sdres); | |
408 | } | |
409 | ||
410 | nla_nest_end(msg, sdp_attr); | |
411 | ||
412 | genlmsg_end(msg, hdr); | |
413 | ||
414 | return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
415 | ||
416 | nla_put_failure: | |
417 | genlmsg_cancel(msg, hdr); | |
418 | ||
419 | free_msg: | |
420 | nlmsg_free(msg); | |
421 | ||
422 | nfc_llcp_free_sdp_tlv_list(sdres_list); | |
423 | ||
424 | return rc; | |
425 | } | |
426 | ||
4d12b8b1 | 427 | static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev, |
15e47304 | 428 | u32 portid, u32 seq, |
0a40acb2 SO |
429 | struct netlink_callback *cb, |
430 | int flags) | |
4d12b8b1 LRV |
431 | { |
432 | void *hdr; | |
433 | ||
15e47304 | 434 | hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags, |
0a40acb2 | 435 | NFC_CMD_GET_DEVICE); |
4d12b8b1 LRV |
436 | if (!hdr) |
437 | return -EMSGSIZE; | |
438 | ||
439 | if (cb) | |
440 | genl_dump_check_consistent(cb, hdr, &nfc_genl_family); | |
441 | ||
1e6428d8 DM |
442 | if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
443 | nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || | |
444 | nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) || | |
390a1bd8 | 445 | nla_put_u32(msg, NFC_ATTR_SE, dev->supported_se) || |
7ad39395 TE |
446 | nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) || |
447 | nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode)) | |
1e6428d8 | 448 | goto nla_put_failure; |
4d12b8b1 LRV |
449 | |
450 | return genlmsg_end(msg, hdr); | |
451 | ||
452 | nla_put_failure: | |
453 | genlmsg_cancel(msg, hdr); | |
454 | return -EMSGSIZE; | |
455 | } | |
456 | ||
457 | static int nfc_genl_dump_devices(struct sk_buff *skb, | |
0a40acb2 | 458 | struct netlink_callback *cb) |
4d12b8b1 LRV |
459 | { |
460 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
461 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
462 | bool first_call = false; | |
463 | ||
4d12b8b1 LRV |
464 | if (!iter) { |
465 | first_call = true; | |
466 | iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL); | |
467 | if (!iter) | |
468 | return -ENOMEM; | |
469 | cb->args[0] = (long) iter; | |
470 | } | |
471 | ||
472 | mutex_lock(&nfc_devlist_mutex); | |
473 | ||
474 | cb->seq = nfc_devlist_generation; | |
475 | ||
476 | if (first_call) { | |
477 | nfc_device_iter_init(iter); | |
478 | dev = nfc_device_iter_next(iter); | |
479 | } | |
480 | ||
481 | while (dev) { | |
482 | int rc; | |
483 | ||
15e47304 | 484 | rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid, |
0a40acb2 | 485 | cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); |
4d12b8b1 LRV |
486 | if (rc < 0) |
487 | break; | |
488 | ||
489 | dev = nfc_device_iter_next(iter); | |
490 | } | |
491 | ||
492 | mutex_unlock(&nfc_devlist_mutex); | |
493 | ||
494 | cb->args[1] = (long) dev; | |
495 | ||
496 | return skb->len; | |
497 | } | |
498 | ||
499 | static int nfc_genl_dump_devices_done(struct netlink_callback *cb) | |
500 | { | |
501 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
502 | ||
4d12b8b1 LRV |
503 | nfc_device_iter_exit(iter); |
504 | kfree(iter); | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
1ed28f61 | 509 | int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx, |
0a40acb2 | 510 | u8 comm_mode, u8 rf_mode) |
1ed28f61 SO |
511 | { |
512 | struct sk_buff *msg; | |
513 | void *hdr; | |
514 | ||
515 | pr_debug("DEP link is up\n"); | |
516 | ||
58050fce | 517 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1ed28f61 SO |
518 | if (!msg) |
519 | return -ENOMEM; | |
520 | ||
0a40acb2 | 521 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP); |
1ed28f61 SO |
522 | if (!hdr) |
523 | goto free_msg; | |
524 | ||
1e6428d8 DM |
525 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
526 | goto nla_put_failure; | |
527 | if (rf_mode == NFC_RF_INITIATOR && | |
528 | nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx)) | |
529 | goto nla_put_failure; | |
530 | if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) || | |
531 | nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode)) | |
532 | goto nla_put_failure; | |
1ed28f61 SO |
533 | |
534 | genlmsg_end(msg, hdr); | |
535 | ||
536 | dev->dep_link_up = true; | |
537 | ||
538 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
539 | ||
540 | return 0; | |
541 | ||
542 | nla_put_failure: | |
543 | genlmsg_cancel(msg, hdr); | |
544 | free_msg: | |
545 | nlmsg_free(msg); | |
546 | return -EMSGSIZE; | |
547 | } | |
548 | ||
549 | int nfc_genl_dep_link_down_event(struct nfc_dev *dev) | |
550 | { | |
551 | struct sk_buff *msg; | |
552 | void *hdr; | |
553 | ||
554 | pr_debug("DEP link is down\n"); | |
555 | ||
58050fce | 556 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1ed28f61 SO |
557 | if (!msg) |
558 | return -ENOMEM; | |
559 | ||
560 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 561 | NFC_CMD_DEP_LINK_DOWN); |
1ed28f61 SO |
562 | if (!hdr) |
563 | goto free_msg; | |
564 | ||
1e6428d8 DM |
565 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
566 | goto nla_put_failure; | |
1ed28f61 SO |
567 | |
568 | genlmsg_end(msg, hdr); | |
569 | ||
570 | genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); | |
571 | ||
572 | return 0; | |
573 | ||
574 | nla_put_failure: | |
575 | genlmsg_cancel(msg, hdr); | |
576 | free_msg: | |
577 | nlmsg_free(msg); | |
578 | return -EMSGSIZE; | |
579 | } | |
580 | ||
4d12b8b1 LRV |
581 | static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info) |
582 | { | |
583 | struct sk_buff *msg; | |
584 | struct nfc_dev *dev; | |
585 | u32 idx; | |
586 | int rc = -ENOBUFS; | |
587 | ||
4d12b8b1 LRV |
588 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
589 | return -EINVAL; | |
590 | ||
591 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
592 | ||
593 | dev = nfc_get_device(idx); | |
594 | if (!dev) | |
595 | return -ENODEV; | |
596 | ||
58050fce | 597 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
4d12b8b1 LRV |
598 | if (!msg) { |
599 | rc = -ENOMEM; | |
600 | goto out_putdev; | |
601 | } | |
602 | ||
15e47304 | 603 | rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq, |
0a40acb2 | 604 | NULL, 0); |
4d12b8b1 LRV |
605 | if (rc < 0) |
606 | goto out_free; | |
607 | ||
608 | nfc_put_device(dev); | |
609 | ||
610 | return genlmsg_reply(msg, info); | |
611 | ||
612 | out_free: | |
613 | nlmsg_free(msg); | |
614 | out_putdev: | |
615 | nfc_put_device(dev); | |
616 | return rc; | |
617 | } | |
618 | ||
8b3fe7b5 IE |
619 | static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info) |
620 | { | |
621 | struct nfc_dev *dev; | |
622 | int rc; | |
623 | u32 idx; | |
624 | ||
8b3fe7b5 IE |
625 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
626 | return -EINVAL; | |
627 | ||
628 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
629 | ||
630 | dev = nfc_get_device(idx); | |
631 | if (!dev) | |
632 | return -ENODEV; | |
633 | ||
634 | rc = nfc_dev_up(dev); | |
635 | ||
636 | nfc_put_device(dev); | |
637 | return rc; | |
638 | } | |
639 | ||
640 | static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info) | |
641 | { | |
642 | struct nfc_dev *dev; | |
643 | int rc; | |
644 | u32 idx; | |
645 | ||
8b3fe7b5 IE |
646 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
647 | return -EINVAL; | |
648 | ||
649 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
650 | ||
651 | dev = nfc_get_device(idx); | |
652 | if (!dev) | |
653 | return -ENODEV; | |
654 | ||
655 | rc = nfc_dev_down(dev); | |
656 | ||
657 | nfc_put_device(dev); | |
658 | return rc; | |
659 | } | |
660 | ||
4d12b8b1 LRV |
661 | static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info) |
662 | { | |
663 | struct nfc_dev *dev; | |
664 | int rc; | |
665 | u32 idx; | |
fe7c5800 | 666 | u32 im_protocols = 0, tm_protocols = 0; |
4d12b8b1 | 667 | |
1ed28f61 SO |
668 | pr_debug("Poll start\n"); |
669 | ||
4d12b8b1 | 670 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
fe7c5800 SO |
671 | ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] && |
672 | !info->attrs[NFC_ATTR_PROTOCOLS]) && | |
0f450772 | 673 | !info->attrs[NFC_ATTR_TM_PROTOCOLS])) |
4d12b8b1 LRV |
674 | return -EINVAL; |
675 | ||
676 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
fe7c5800 SO |
677 | |
678 | if (info->attrs[NFC_ATTR_TM_PROTOCOLS]) | |
679 | tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]); | |
fe7c5800 SO |
680 | |
681 | if (info->attrs[NFC_ATTR_IM_PROTOCOLS]) | |
682 | im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]); | |
5e50ee3a SO |
683 | else if (info->attrs[NFC_ATTR_PROTOCOLS]) |
684 | im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); | |
4d12b8b1 LRV |
685 | |
686 | dev = nfc_get_device(idx); | |
687 | if (!dev) | |
688 | return -ENODEV; | |
689 | ||
690 | mutex_lock(&dev->genl_data.genl_data_mutex); | |
691 | ||
fe7c5800 | 692 | rc = nfc_start_poll(dev, im_protocols, tm_protocols); |
4d12b8b1 | 693 | if (!rc) |
15e47304 | 694 | dev->genl_data.poll_req_portid = info->snd_portid; |
4d12b8b1 LRV |
695 | |
696 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
697 | ||
698 | nfc_put_device(dev); | |
699 | return rc; | |
700 | } | |
701 | ||
702 | static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info) | |
703 | { | |
704 | struct nfc_dev *dev; | |
705 | int rc; | |
706 | u32 idx; | |
707 | ||
4d12b8b1 LRV |
708 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
709 | return -EINVAL; | |
710 | ||
711 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
712 | ||
713 | dev = nfc_get_device(idx); | |
714 | if (!dev) | |
715 | return -ENODEV; | |
716 | ||
a831b913 SO |
717 | device_lock(&dev->dev); |
718 | ||
719 | if (!dev->polling) { | |
720 | device_unlock(&dev->dev); | |
721 | return -EINVAL; | |
722 | } | |
723 | ||
724 | device_unlock(&dev->dev); | |
725 | ||
4d12b8b1 LRV |
726 | mutex_lock(&dev->genl_data.genl_data_mutex); |
727 | ||
15e47304 | 728 | if (dev->genl_data.poll_req_portid != info->snd_portid) { |
4d12b8b1 LRV |
729 | rc = -EBUSY; |
730 | goto out; | |
731 | } | |
732 | ||
733 | rc = nfc_stop_poll(dev); | |
15e47304 | 734 | dev->genl_data.poll_req_portid = 0; |
4d12b8b1 LRV |
735 | |
736 | out: | |
737 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
738 | nfc_put_device(dev); | |
739 | return rc; | |
740 | } | |
741 | ||
1ed28f61 SO |
742 | static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info) |
743 | { | |
744 | struct nfc_dev *dev; | |
745 | int rc, tgt_idx; | |
746 | u32 idx; | |
47807d3d | 747 | u8 comm; |
1ed28f61 SO |
748 | |
749 | pr_debug("DEP link up\n"); | |
750 | ||
751 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
47807d3d | 752 | !info->attrs[NFC_ATTR_COMM_MODE]) |
1ed28f61 SO |
753 | return -EINVAL; |
754 | ||
755 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
756 | if (!info->attrs[NFC_ATTR_TARGET_INDEX]) | |
757 | tgt_idx = NFC_TARGET_IDX_ANY; | |
758 | else | |
759 | tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); | |
760 | ||
761 | comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]); | |
1ed28f61 SO |
762 | |
763 | if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE) | |
764 | return -EINVAL; | |
765 | ||
1ed28f61 SO |
766 | dev = nfc_get_device(idx); |
767 | if (!dev) | |
768 | return -ENODEV; | |
769 | ||
47807d3d | 770 | rc = nfc_dep_link_up(dev, tgt_idx, comm); |
1ed28f61 SO |
771 | |
772 | nfc_put_device(dev); | |
773 | ||
774 | return rc; | |
775 | } | |
776 | ||
777 | static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) | |
778 | { | |
779 | struct nfc_dev *dev; | |
780 | int rc; | |
781 | u32 idx; | |
782 | ||
783 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) | |
784 | return -EINVAL; | |
785 | ||
786 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
787 | ||
788 | dev = nfc_get_device(idx); | |
789 | if (!dev) | |
790 | return -ENODEV; | |
791 | ||
792 | rc = nfc_dep_link_down(dev); | |
793 | ||
794 | nfc_put_device(dev); | |
795 | return rc; | |
796 | } | |
797 | ||
52feb444 TE |
798 | static int nfc_genl_send_params(struct sk_buff *msg, |
799 | struct nfc_llcp_local *local, | |
800 | u32 portid, u32 seq) | |
801 | { | |
802 | void *hdr; | |
803 | ||
804 | hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0, | |
805 | NFC_CMD_LLC_GET_PARAMS); | |
806 | if (!hdr) | |
807 | return -EMSGSIZE; | |
808 | ||
809 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) || | |
810 | nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) || | |
811 | nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) || | |
812 | nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux))) | |
813 | goto nla_put_failure; | |
814 | ||
815 | return genlmsg_end(msg, hdr); | |
816 | ||
817 | nla_put_failure: | |
818 | ||
819 | genlmsg_cancel(msg, hdr); | |
820 | return -EMSGSIZE; | |
821 | } | |
822 | ||
823 | static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info) | |
824 | { | |
825 | struct nfc_dev *dev; | |
826 | struct nfc_llcp_local *local; | |
827 | int rc = 0; | |
828 | struct sk_buff *msg = NULL; | |
829 | u32 idx; | |
830 | ||
831 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) | |
832 | return -EINVAL; | |
833 | ||
834 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
835 | ||
836 | dev = nfc_get_device(idx); | |
837 | if (!dev) | |
838 | return -ENODEV; | |
839 | ||
840 | device_lock(&dev->dev); | |
841 | ||
842 | local = nfc_llcp_find_local(dev); | |
843 | if (!local) { | |
844 | rc = -ENODEV; | |
845 | goto exit; | |
846 | } | |
847 | ||
848 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
849 | if (!msg) { | |
850 | rc = -ENOMEM; | |
851 | goto exit; | |
852 | } | |
853 | ||
854 | rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq); | |
855 | ||
856 | exit: | |
857 | device_unlock(&dev->dev); | |
858 | ||
859 | nfc_put_device(dev); | |
860 | ||
861 | if (rc < 0) { | |
862 | if (msg) | |
863 | nlmsg_free(msg); | |
864 | ||
865 | return rc; | |
866 | } | |
867 | ||
868 | return genlmsg_reply(msg, info); | |
869 | } | |
870 | ||
871 | static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info) | |
872 | { | |
873 | struct nfc_dev *dev; | |
874 | struct nfc_llcp_local *local; | |
875 | u8 rw = 0; | |
876 | u16 miux = 0; | |
877 | u32 idx; | |
878 | int rc = 0; | |
879 | ||
880 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
881 | (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] && | |
882 | !info->attrs[NFC_ATTR_LLC_PARAM_RW] && | |
883 | !info->attrs[NFC_ATTR_LLC_PARAM_MIUX])) | |
884 | return -EINVAL; | |
885 | ||
886 | if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) { | |
887 | rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]); | |
888 | ||
889 | if (rw > LLCP_MAX_RW) | |
890 | return -EINVAL; | |
891 | } | |
892 | ||
893 | if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) { | |
894 | miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]); | |
895 | ||
896 | if (miux > LLCP_MAX_MIUX) | |
897 | return -EINVAL; | |
898 | } | |
899 | ||
900 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
901 | ||
902 | dev = nfc_get_device(idx); | |
903 | if (!dev) | |
904 | return -ENODEV; | |
905 | ||
906 | device_lock(&dev->dev); | |
907 | ||
908 | local = nfc_llcp_find_local(dev); | |
909 | if (!local) { | |
910 | nfc_put_device(dev); | |
911 | rc = -ENODEV; | |
912 | goto exit; | |
913 | } | |
914 | ||
915 | if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) { | |
916 | if (dev->dep_link_up) { | |
917 | rc = -EINPROGRESS; | |
918 | goto exit; | |
919 | } | |
920 | ||
921 | local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]); | |
922 | } | |
923 | ||
924 | if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) | |
925 | local->rw = rw; | |
926 | ||
927 | if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) | |
928 | local->miux = cpu_to_be16(miux); | |
929 | ||
930 | exit: | |
931 | device_unlock(&dev->dev); | |
932 | ||
933 | nfc_put_device(dev); | |
934 | ||
935 | return rc; | |
936 | } | |
937 | ||
d9b8d8e1 TE |
938 | static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info) |
939 | { | |
940 | struct nfc_dev *dev; | |
941 | struct nfc_llcp_local *local; | |
942 | struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1]; | |
943 | u32 idx; | |
944 | u8 tid; | |
945 | char *uri; | |
946 | int rc = 0, rem; | |
947 | size_t uri_len, tlvs_len; | |
948 | struct hlist_head sdreq_list; | |
949 | struct nfc_llcp_sdp_tlv *sdreq; | |
950 | ||
951 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
952 | !info->attrs[NFC_ATTR_LLC_SDP]) | |
953 | return -EINVAL; | |
954 | ||
955 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
956 | ||
957 | dev = nfc_get_device(idx); | |
958 | if (!dev) { | |
959 | rc = -ENODEV; | |
960 | goto exit; | |
961 | } | |
962 | ||
963 | device_lock(&dev->dev); | |
964 | ||
965 | if (dev->dep_link_up == false) { | |
966 | rc = -ENOLINK; | |
967 | goto exit; | |
968 | } | |
969 | ||
970 | local = nfc_llcp_find_local(dev); | |
971 | if (!local) { | |
972 | nfc_put_device(dev); | |
973 | rc = -ENODEV; | |
974 | goto exit; | |
975 | } | |
976 | ||
977 | INIT_HLIST_HEAD(&sdreq_list); | |
978 | ||
979 | tlvs_len = 0; | |
980 | ||
981 | nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) { | |
982 | rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr, | |
983 | nfc_sdp_genl_policy); | |
984 | ||
985 | if (rc != 0) { | |
986 | rc = -EINVAL; | |
987 | goto exit; | |
988 | } | |
989 | ||
990 | if (!sdp_attrs[NFC_SDP_ATTR_URI]) | |
991 | continue; | |
992 | ||
993 | uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]); | |
994 | if (uri_len == 0) | |
995 | continue; | |
996 | ||
997 | uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]); | |
998 | if (uri == NULL || *uri == 0) | |
999 | continue; | |
1000 | ||
1001 | tid = local->sdreq_next_tid++; | |
1002 | ||
1003 | sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len); | |
1004 | if (sdreq == NULL) { | |
1005 | rc = -ENOMEM; | |
1006 | goto exit; | |
1007 | } | |
1008 | ||
1009 | tlvs_len += sdreq->tlv_len; | |
1010 | ||
1011 | hlist_add_head(&sdreq->node, &sdreq_list); | |
1012 | } | |
1013 | ||
1014 | if (hlist_empty(&sdreq_list)) { | |
1015 | rc = -EINVAL; | |
1016 | goto exit; | |
1017 | } | |
1018 | ||
1019 | rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len); | |
1020 | exit: | |
1021 | device_unlock(&dev->dev); | |
1022 | ||
1023 | nfc_put_device(dev); | |
1024 | ||
1025 | return rc; | |
1026 | } | |
1027 | ||
4d12b8b1 LRV |
1028 | static struct genl_ops nfc_genl_ops[] = { |
1029 | { | |
1030 | .cmd = NFC_CMD_GET_DEVICE, | |
1031 | .doit = nfc_genl_get_device, | |
1032 | .dumpit = nfc_genl_dump_devices, | |
1033 | .done = nfc_genl_dump_devices_done, | |
1034 | .policy = nfc_genl_policy, | |
8b3fe7b5 IE |
1035 | }, |
1036 | { | |
1037 | .cmd = NFC_CMD_DEV_UP, | |
1038 | .doit = nfc_genl_dev_up, | |
1039 | .policy = nfc_genl_policy, | |
1040 | }, | |
1041 | { | |
1042 | .cmd = NFC_CMD_DEV_DOWN, | |
1043 | .doit = nfc_genl_dev_down, | |
1044 | .policy = nfc_genl_policy, | |
4d12b8b1 LRV |
1045 | }, |
1046 | { | |
1047 | .cmd = NFC_CMD_START_POLL, | |
1048 | .doit = nfc_genl_start_poll, | |
1049 | .policy = nfc_genl_policy, | |
1050 | }, | |
1051 | { | |
1052 | .cmd = NFC_CMD_STOP_POLL, | |
1053 | .doit = nfc_genl_stop_poll, | |
1054 | .policy = nfc_genl_policy, | |
1055 | }, | |
1ed28f61 SO |
1056 | { |
1057 | .cmd = NFC_CMD_DEP_LINK_UP, | |
1058 | .doit = nfc_genl_dep_link_up, | |
1059 | .policy = nfc_genl_policy, | |
1060 | }, | |
1061 | { | |
1062 | .cmd = NFC_CMD_DEP_LINK_DOWN, | |
1063 | .doit = nfc_genl_dep_link_down, | |
1064 | .policy = nfc_genl_policy, | |
1065 | }, | |
4d12b8b1 LRV |
1066 | { |
1067 | .cmd = NFC_CMD_GET_TARGET, | |
1068 | .dumpit = nfc_genl_dump_targets, | |
1069 | .done = nfc_genl_dump_targets_done, | |
1070 | .policy = nfc_genl_policy, | |
1071 | }, | |
52feb444 TE |
1072 | { |
1073 | .cmd = NFC_CMD_LLC_GET_PARAMS, | |
1074 | .doit = nfc_genl_llc_get_params, | |
1075 | .policy = nfc_genl_policy, | |
1076 | }, | |
1077 | { | |
1078 | .cmd = NFC_CMD_LLC_SET_PARAMS, | |
1079 | .doit = nfc_genl_llc_set_params, | |
1080 | .policy = nfc_genl_policy, | |
1081 | }, | |
d9b8d8e1 TE |
1082 | { |
1083 | .cmd = NFC_CMD_LLC_SDREQ, | |
1084 | .doit = nfc_genl_llc_sdreq, | |
1085 | .policy = nfc_genl_policy, | |
1086 | }, | |
4d12b8b1 LRV |
1087 | }; |
1088 | ||
3c0cc8aa SJ |
1089 | |
1090 | struct urelease_work { | |
1091 | struct work_struct w; | |
c487606f | 1092 | int portid; |
3c0cc8aa SJ |
1093 | }; |
1094 | ||
1095 | static void nfc_urelease_event_work(struct work_struct *work) | |
4d12b8b1 | 1096 | { |
3c0cc8aa | 1097 | struct urelease_work *w = container_of(work, struct urelease_work, w); |
4d12b8b1 LRV |
1098 | struct class_dev_iter iter; |
1099 | struct nfc_dev *dev; | |
1100 | ||
c487606f | 1101 | pr_debug("portid %d\n", w->portid); |
4d12b8b1 | 1102 | |
3c0cc8aa | 1103 | mutex_lock(&nfc_devlist_mutex); |
4d12b8b1 LRV |
1104 | |
1105 | nfc_device_iter_init(&iter); | |
1106 | dev = nfc_device_iter_next(&iter); | |
1107 | ||
1108 | while (dev) { | |
3c0cc8aa SJ |
1109 | mutex_lock(&dev->genl_data.genl_data_mutex); |
1110 | ||
c487606f | 1111 | if (dev->genl_data.poll_req_portid == w->portid) { |
4d12b8b1 | 1112 | nfc_stop_poll(dev); |
15e47304 | 1113 | dev->genl_data.poll_req_portid = 0; |
4d12b8b1 | 1114 | } |
3c0cc8aa SJ |
1115 | |
1116 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
1117 | ||
4d12b8b1 LRV |
1118 | dev = nfc_device_iter_next(&iter); |
1119 | } | |
1120 | ||
1121 | nfc_device_iter_exit(&iter); | |
1122 | ||
3c0cc8aa SJ |
1123 | mutex_unlock(&nfc_devlist_mutex); |
1124 | ||
1125 | kfree(w); | |
1126 | } | |
1127 | ||
1128 | static int nfc_genl_rcv_nl_event(struct notifier_block *this, | |
1129 | unsigned long event, void *ptr) | |
1130 | { | |
1131 | struct netlink_notify *n = ptr; | |
1132 | struct urelease_work *w; | |
1133 | ||
1134 | if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC) | |
1135 | goto out; | |
1136 | ||
c487606f | 1137 | pr_debug("NETLINK_URELEASE event from id %d\n", n->portid); |
3c0cc8aa SJ |
1138 | |
1139 | w = kmalloc(sizeof(*w), GFP_ATOMIC); | |
1140 | if (w) { | |
1141 | INIT_WORK((struct work_struct *) w, nfc_urelease_event_work); | |
c487606f | 1142 | w->portid = n->portid; |
3c0cc8aa SJ |
1143 | schedule_work((struct work_struct *) w); |
1144 | } | |
1145 | ||
4d12b8b1 LRV |
1146 | out: |
1147 | return NOTIFY_DONE; | |
1148 | } | |
1149 | ||
1150 | void nfc_genl_data_init(struct nfc_genl_data *genl_data) | |
1151 | { | |
15e47304 | 1152 | genl_data->poll_req_portid = 0; |
4d12b8b1 LRV |
1153 | mutex_init(&genl_data->genl_data_mutex); |
1154 | } | |
1155 | ||
1156 | void nfc_genl_data_exit(struct nfc_genl_data *genl_data) | |
1157 | { | |
1158 | mutex_destroy(&genl_data->genl_data_mutex); | |
1159 | } | |
1160 | ||
1161 | static struct notifier_block nl_notifier = { | |
1162 | .notifier_call = nfc_genl_rcv_nl_event, | |
1163 | }; | |
1164 | ||
1165 | /** | |
1166 | * nfc_genl_init() - Initialize netlink interface | |
1167 | * | |
1168 | * This initialization function registers the nfc netlink family. | |
1169 | */ | |
1170 | int __init nfc_genl_init(void) | |
1171 | { | |
1172 | int rc; | |
1173 | ||
1174 | rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops, | |
0a40acb2 | 1175 | ARRAY_SIZE(nfc_genl_ops)); |
4d12b8b1 LRV |
1176 | if (rc) |
1177 | return rc; | |
1178 | ||
1179 | rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp); | |
1180 | ||
1181 | netlink_register_notifier(&nl_notifier); | |
1182 | ||
1183 | return rc; | |
1184 | } | |
1185 | ||
1186 | /** | |
1187 | * nfc_genl_exit() - Deinitialize netlink interface | |
1188 | * | |
1189 | * This exit function unregisters the nfc netlink family. | |
1190 | */ | |
1191 | void nfc_genl_exit(void) | |
1192 | { | |
1193 | netlink_unregister_notifier(&nl_notifier); | |
1194 | genl_unregister_family(&nfc_genl_family); | |
1195 | } |