]>
Commit | Line | Data |
---|---|---|
4d12b8b1 LRV |
1 | /* |
2 | * Copyright (C) 2011 Instituto Nokia de Tecnologia | |
3 | * | |
4 | * Authors: | |
5 | * Lauro Ramos Venancio <lauro.venancio@openbossa.org> | |
6 | * Aloisio Almeida Jr <aloisio.almeida@openbossa.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
98b32dec | 19 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
4d12b8b1 LRV |
20 | */ |
21 | ||
52858b51 | 22 | #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ |
20c239c1 | 23 | |
4d12b8b1 LRV |
24 | #include <net/genetlink.h> |
25 | #include <linux/nfc.h> | |
26 | #include <linux/slab.h> | |
27 | ||
28 | #include "nfc.h" | |
30cc4587 | 29 | #include "llcp.h" |
52feb444 | 30 | |
2a94fe48 JB |
31 | static const struct genl_multicast_group nfc_genl_mcgrps[] = { |
32 | { .name = NFC_GENL_MCAST_EVENT_NAME, }, | |
4d12b8b1 LRV |
33 | }; |
34 | ||
e5fe4cf8 | 35 | static struct genl_family nfc_genl_family = { |
4d12b8b1 LRV |
36 | .id = GENL_ID_GENERATE, |
37 | .hdrsize = 0, | |
38 | .name = NFC_GENL_NAME, | |
39 | .version = NFC_GENL_VERSION, | |
40 | .maxattr = NFC_ATTR_MAX, | |
41 | }; | |
42 | ||
43 | static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = { | |
44 | [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 }, | |
45 | [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING, | |
46 | .len = NFC_DEVICE_NAME_MAXSIZE }, | |
47 | [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 }, | |
1ed28f61 SO |
48 | [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 }, |
49 | [NFC_ATTR_RF_MODE] = { .type = NLA_U8 }, | |
c970a1ac | 50 | [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 }, |
fe7c5800 SO |
51 | [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 }, |
52 | [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 }, | |
8af362d1 TE |
53 | [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 }, |
54 | [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 }, | |
55 | [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 }, | |
d9b8d8e1 | 56 | [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED }, |
9674da87 EL |
57 | [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING, |
58 | .len = NFC_FIRMWARE_NAME_MAXSIZE }, | |
5ce3f32b | 59 | [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY }, |
d9b8d8e1 TE |
60 | }; |
61 | ||
62 | static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = { | |
63 | [NFC_SDP_ATTR_URI] = { .type = NLA_STRING }, | |
64 | [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 }, | |
4d12b8b1 LRV |
65 | }; |
66 | ||
67 | static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target, | |
0a40acb2 | 68 | struct netlink_callback *cb, int flags) |
4d12b8b1 LRV |
69 | { |
70 | void *hdr; | |
71 | ||
15e47304 | 72 | hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
0a40acb2 | 73 | &nfc_genl_family, flags, NFC_CMD_GET_TARGET); |
4d12b8b1 LRV |
74 | if (!hdr) |
75 | return -EMSGSIZE; | |
76 | ||
77 | genl_dump_check_consistent(cb, hdr, &nfc_genl_family); | |
78 | ||
1e6428d8 DM |
79 | if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) || |
80 | nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) || | |
81 | nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) || | |
82 | nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res)) | |
83 | goto nla_put_failure; | |
84 | if (target->nfcid1_len > 0 && | |
85 | nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len, | |
86 | target->nfcid1)) | |
87 | goto nla_put_failure; | |
88 | if (target->sensb_res_len > 0 && | |
89 | nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len, | |
90 | target->sensb_res)) | |
91 | goto nla_put_failure; | |
92 | if (target->sensf_res_len > 0 && | |
93 | nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len, | |
94 | target->sensf_res)) | |
95 | goto nla_put_failure; | |
4d12b8b1 | 96 | |
f5f6872e MG |
97 | if (target->is_iso15693) { |
98 | if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID, | |
99 | target->iso15693_dsfid) || | |
100 | nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID, | |
101 | sizeof(target->iso15693_uid), target->iso15693_uid)) | |
102 | goto nla_put_failure; | |
103 | } | |
104 | ||
053c095a JB |
105 | genlmsg_end(msg, hdr); |
106 | return 0; | |
4d12b8b1 LRV |
107 | |
108 | nla_put_failure: | |
109 | genlmsg_cancel(msg, hdr); | |
110 | return -EMSGSIZE; | |
111 | } | |
112 | ||
113 | static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb) | |
114 | { | |
115 | struct nfc_dev *dev; | |
116 | int rc; | |
117 | u32 idx; | |
118 | ||
119 | rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize, | |
0a40acb2 SO |
120 | nfc_genl_family.attrbuf, |
121 | nfc_genl_family.maxattr, | |
122 | nfc_genl_policy); | |
4d12b8b1 LRV |
123 | if (rc < 0) |
124 | return ERR_PTR(rc); | |
125 | ||
126 | if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]) | |
127 | return ERR_PTR(-EINVAL); | |
128 | ||
129 | idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]); | |
130 | ||
131 | dev = nfc_get_device(idx); | |
132 | if (!dev) | |
133 | return ERR_PTR(-ENODEV); | |
134 | ||
135 | return dev; | |
136 | } | |
137 | ||
138 | static int nfc_genl_dump_targets(struct sk_buff *skb, | |
0a40acb2 | 139 | struct netlink_callback *cb) |
4d12b8b1 LRV |
140 | { |
141 | int i = cb->args[0]; | |
142 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
143 | int rc; | |
144 | ||
4d12b8b1 LRV |
145 | if (!dev) { |
146 | dev = __get_device_from_cb(cb); | |
147 | if (IS_ERR(dev)) | |
148 | return PTR_ERR(dev); | |
149 | ||
150 | cb->args[1] = (long) dev; | |
151 | } | |
152 | ||
d4ccb132 | 153 | device_lock(&dev->dev); |
4d12b8b1 LRV |
154 | |
155 | cb->seq = dev->targets_generation; | |
156 | ||
157 | while (i < dev->n_targets) { | |
158 | rc = nfc_genl_send_target(skb, &dev->targets[i], cb, | |
0a40acb2 | 159 | NLM_F_MULTI); |
4d12b8b1 LRV |
160 | if (rc < 0) |
161 | break; | |
162 | ||
163 | i++; | |
164 | } | |
165 | ||
d4ccb132 | 166 | device_unlock(&dev->dev); |
4d12b8b1 LRV |
167 | |
168 | cb->args[0] = i; | |
169 | ||
170 | return skb->len; | |
171 | } | |
172 | ||
173 | static int nfc_genl_dump_targets_done(struct netlink_callback *cb) | |
174 | { | |
175 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
176 | ||
4d12b8b1 LRV |
177 | if (dev) |
178 | nfc_put_device(dev); | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | int nfc_genl_targets_found(struct nfc_dev *dev) | |
184 | { | |
185 | struct sk_buff *msg; | |
186 | void *hdr; | |
187 | ||
15e47304 | 188 | dev->genl_data.poll_req_portid = 0; |
4d12b8b1 | 189 | |
58050fce | 190 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
4d12b8b1 LRV |
191 | if (!msg) |
192 | return -ENOMEM; | |
193 | ||
194 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 195 | NFC_EVENT_TARGETS_FOUND); |
4d12b8b1 LRV |
196 | if (!hdr) |
197 | goto free_msg; | |
198 | ||
1e6428d8 DM |
199 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
200 | goto nla_put_failure; | |
4d12b8b1 LRV |
201 | |
202 | genlmsg_end(msg, hdr); | |
203 | ||
2a94fe48 | 204 | return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); |
4d12b8b1 LRV |
205 | |
206 | nla_put_failure: | |
207 | genlmsg_cancel(msg, hdr); | |
208 | free_msg: | |
209 | nlmsg_free(msg); | |
210 | return -EMSGSIZE; | |
211 | } | |
212 | ||
8112a5c9 SO |
213 | int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx) |
214 | { | |
215 | struct sk_buff *msg; | |
216 | void *hdr; | |
217 | ||
58050fce | 218 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
8112a5c9 SO |
219 | if (!msg) |
220 | return -ENOMEM; | |
221 | ||
222 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
223 | NFC_EVENT_TARGET_LOST); | |
224 | if (!hdr) | |
225 | goto free_msg; | |
226 | ||
59ef43e6 JL |
227 | if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
228 | nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx)) | |
229 | goto nla_put_failure; | |
8112a5c9 SO |
230 | |
231 | genlmsg_end(msg, hdr); | |
232 | ||
2a94fe48 | 233 | genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
8112a5c9 SO |
234 | |
235 | return 0; | |
236 | ||
fc40a8c1 SO |
237 | nla_put_failure: |
238 | genlmsg_cancel(msg, hdr); | |
239 | free_msg: | |
240 | nlmsg_free(msg); | |
241 | return -EMSGSIZE; | |
242 | } | |
243 | ||
244 | int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol) | |
245 | { | |
246 | struct sk_buff *msg; | |
247 | void *hdr; | |
248 | ||
58050fce | 249 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
fc40a8c1 SO |
250 | if (!msg) |
251 | return -ENOMEM; | |
252 | ||
253 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
254 | NFC_EVENT_TM_ACTIVATED); | |
255 | if (!hdr) | |
256 | goto free_msg; | |
257 | ||
258 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) | |
259 | goto nla_put_failure; | |
260 | if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol)) | |
261 | goto nla_put_failure; | |
262 | ||
263 | genlmsg_end(msg, hdr); | |
264 | ||
2a94fe48 | 265 | genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
fc40a8c1 SO |
266 | |
267 | return 0; | |
268 | ||
269 | nla_put_failure: | |
270 | genlmsg_cancel(msg, hdr); | |
271 | free_msg: | |
272 | nlmsg_free(msg); | |
273 | return -EMSGSIZE; | |
274 | } | |
275 | ||
276 | int nfc_genl_tm_deactivated(struct nfc_dev *dev) | |
277 | { | |
278 | struct sk_buff *msg; | |
279 | void *hdr; | |
280 | ||
58050fce | 281 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
fc40a8c1 SO |
282 | if (!msg) |
283 | return -ENOMEM; | |
284 | ||
285 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
286 | NFC_EVENT_TM_DEACTIVATED); | |
287 | if (!hdr) | |
288 | goto free_msg; | |
289 | ||
290 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) | |
291 | goto nla_put_failure; | |
292 | ||
293 | genlmsg_end(msg, hdr); | |
294 | ||
2a94fe48 | 295 | genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
fc40a8c1 SO |
296 | |
297 | return 0; | |
298 | ||
8112a5c9 SO |
299 | nla_put_failure: |
300 | genlmsg_cancel(msg, hdr); | |
301 | free_msg: | |
302 | nlmsg_free(msg); | |
303 | return -EMSGSIZE; | |
304 | } | |
305 | ||
4d12b8b1 LRV |
306 | int nfc_genl_device_added(struct nfc_dev *dev) |
307 | { | |
308 | struct sk_buff *msg; | |
309 | void *hdr; | |
310 | ||
58050fce | 311 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
4d12b8b1 LRV |
312 | if (!msg) |
313 | return -ENOMEM; | |
314 | ||
315 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 316 | NFC_EVENT_DEVICE_ADDED); |
4d12b8b1 LRV |
317 | if (!hdr) |
318 | goto free_msg; | |
319 | ||
1e6428d8 DM |
320 | if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
321 | nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || | |
322 | nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) || | |
323 | nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up)) | |
324 | goto nla_put_failure; | |
4d12b8b1 LRV |
325 | |
326 | genlmsg_end(msg, hdr); | |
327 | ||
2a94fe48 | 328 | genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
4d12b8b1 LRV |
329 | |
330 | return 0; | |
331 | ||
332 | nla_put_failure: | |
333 | genlmsg_cancel(msg, hdr); | |
334 | free_msg: | |
335 | nlmsg_free(msg); | |
336 | return -EMSGSIZE; | |
337 | } | |
338 | ||
339 | int nfc_genl_device_removed(struct nfc_dev *dev) | |
340 | { | |
341 | struct sk_buff *msg; | |
342 | void *hdr; | |
343 | ||
58050fce | 344 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
4d12b8b1 LRV |
345 | if (!msg) |
346 | return -ENOMEM; | |
347 | ||
348 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 349 | NFC_EVENT_DEVICE_REMOVED); |
4d12b8b1 LRV |
350 | if (!hdr) |
351 | goto free_msg; | |
352 | ||
1e6428d8 DM |
353 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
354 | goto nla_put_failure; | |
4d12b8b1 LRV |
355 | |
356 | genlmsg_end(msg, hdr); | |
357 | ||
2a94fe48 | 358 | genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
4d12b8b1 LRV |
359 | |
360 | return 0; | |
361 | ||
362 | nla_put_failure: | |
363 | genlmsg_cancel(msg, hdr); | |
364 | free_msg: | |
365 | nlmsg_free(msg); | |
366 | return -EMSGSIZE; | |
367 | } | |
368 | ||
d9b8d8e1 TE |
369 | int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list) |
370 | { | |
371 | struct sk_buff *msg; | |
372 | struct nlattr *sdp_attr, *uri_attr; | |
373 | struct nfc_llcp_sdp_tlv *sdres; | |
374 | struct hlist_node *n; | |
375 | void *hdr; | |
376 | int rc = -EMSGSIZE; | |
377 | int i; | |
378 | ||
379 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
380 | if (!msg) | |
381 | return -ENOMEM; | |
382 | ||
383 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
384 | NFC_EVENT_LLC_SDRES); | |
385 | if (!hdr) | |
386 | goto free_msg; | |
387 | ||
388 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) | |
389 | goto nla_put_failure; | |
390 | ||
391 | sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP); | |
392 | if (sdp_attr == NULL) { | |
393 | rc = -ENOMEM; | |
394 | goto nla_put_failure; | |
395 | } | |
396 | ||
397 | i = 1; | |
398 | hlist_for_each_entry_safe(sdres, n, sdres_list, node) { | |
399 | pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap); | |
400 | ||
401 | uri_attr = nla_nest_start(msg, i++); | |
402 | if (uri_attr == NULL) { | |
403 | rc = -ENOMEM; | |
404 | goto nla_put_failure; | |
405 | } | |
406 | ||
407 | if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap)) | |
408 | goto nla_put_failure; | |
409 | ||
410 | if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri)) | |
411 | goto nla_put_failure; | |
412 | ||
413 | nla_nest_end(msg, uri_attr); | |
414 | ||
415 | hlist_del(&sdres->node); | |
416 | ||
417 | nfc_llcp_free_sdp_tlv(sdres); | |
418 | } | |
419 | ||
420 | nla_nest_end(msg, sdp_attr); | |
421 | ||
422 | genlmsg_end(msg, hdr); | |
423 | ||
2a94fe48 | 424 | return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); |
d9b8d8e1 TE |
425 | |
426 | nla_put_failure: | |
427 | genlmsg_cancel(msg, hdr); | |
428 | ||
429 | free_msg: | |
430 | nlmsg_free(msg); | |
431 | ||
432 | nfc_llcp_free_sdp_tlv_list(sdres_list); | |
433 | ||
434 | return rc; | |
435 | } | |
436 | ||
2757c372 SO |
437 | int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type) |
438 | { | |
439 | struct sk_buff *msg; | |
440 | void *hdr; | |
441 | ||
442 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
443 | if (!msg) | |
444 | return -ENOMEM; | |
445 | ||
446 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
447 | NFC_EVENT_SE_ADDED); | |
448 | if (!hdr) | |
449 | goto free_msg; | |
450 | ||
451 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || | |
452 | nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) || | |
453 | nla_put_u8(msg, NFC_ATTR_SE_TYPE, type)) | |
454 | goto nla_put_failure; | |
455 | ||
456 | genlmsg_end(msg, hdr); | |
457 | ||
2a94fe48 | 458 | genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
2757c372 SO |
459 | |
460 | return 0; | |
461 | ||
462 | nla_put_failure: | |
463 | genlmsg_cancel(msg, hdr); | |
464 | free_msg: | |
465 | nlmsg_free(msg); | |
466 | return -EMSGSIZE; | |
467 | } | |
468 | ||
469 | int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx) | |
470 | { | |
471 | struct sk_buff *msg; | |
472 | void *hdr; | |
473 | ||
474 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
475 | if (!msg) | |
476 | return -ENOMEM; | |
477 | ||
478 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
479 | NFC_EVENT_SE_REMOVED); | |
480 | if (!hdr) | |
481 | goto free_msg; | |
482 | ||
483 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || | |
484 | nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx)) | |
485 | goto nla_put_failure; | |
486 | ||
487 | genlmsg_end(msg, hdr); | |
488 | ||
2a94fe48 | 489 | genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
2757c372 SO |
490 | |
491 | return 0; | |
492 | ||
493 | nla_put_failure: | |
494 | genlmsg_cancel(msg, hdr); | |
495 | free_msg: | |
496 | nlmsg_free(msg); | |
497 | return -EMSGSIZE; | |
498 | } | |
499 | ||
447b27c4 CR |
500 | int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx, |
501 | struct nfc_evt_transaction *evt_transaction) | |
502 | { | |
503 | struct nfc_se *se; | |
504 | struct sk_buff *msg; | |
505 | void *hdr; | |
506 | ||
507 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
508 | if (!msg) | |
509 | return -ENOMEM; | |
510 | ||
511 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
512 | NFC_EVENT_SE_TRANSACTION); | |
513 | if (!hdr) | |
514 | goto free_msg; | |
515 | ||
516 | se = nfc_find_se(dev, se_idx); | |
517 | if (!se) | |
518 | goto free_msg; | |
519 | ||
520 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || | |
521 | nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) || | |
522 | nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) || | |
523 | nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len, | |
524 | evt_transaction->aid) || | |
525 | nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len, | |
526 | evt_transaction->params)) | |
527 | goto nla_put_failure; | |
528 | ||
529 | /* evt_transaction is no more used */ | |
530 | devm_kfree(&dev->dev, evt_transaction); | |
531 | ||
532 | genlmsg_end(msg, hdr); | |
533 | ||
534 | genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); | |
535 | ||
536 | return 0; | |
537 | ||
538 | nla_put_failure: | |
539 | genlmsg_cancel(msg, hdr); | |
540 | free_msg: | |
541 | /* evt_transaction is no more used */ | |
542 | devm_kfree(&dev->dev, evt_transaction); | |
543 | nlmsg_free(msg); | |
544 | return -EMSGSIZE; | |
545 | } | |
546 | ||
4d12b8b1 | 547 | static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev, |
15e47304 | 548 | u32 portid, u32 seq, |
0a40acb2 SO |
549 | struct netlink_callback *cb, |
550 | int flags) | |
4d12b8b1 LRV |
551 | { |
552 | void *hdr; | |
553 | ||
15e47304 | 554 | hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags, |
0a40acb2 | 555 | NFC_CMD_GET_DEVICE); |
4d12b8b1 LRV |
556 | if (!hdr) |
557 | return -EMSGSIZE; | |
558 | ||
559 | if (cb) | |
560 | genl_dump_check_consistent(cb, hdr, &nfc_genl_family); | |
561 | ||
1e6428d8 DM |
562 | if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
563 | nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || | |
564 | nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) || | |
7ad39395 TE |
565 | nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) || |
566 | nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode)) | |
1e6428d8 | 567 | goto nla_put_failure; |
4d12b8b1 | 568 | |
053c095a JB |
569 | genlmsg_end(msg, hdr); |
570 | return 0; | |
4d12b8b1 LRV |
571 | |
572 | nla_put_failure: | |
573 | genlmsg_cancel(msg, hdr); | |
574 | return -EMSGSIZE; | |
575 | } | |
576 | ||
577 | static int nfc_genl_dump_devices(struct sk_buff *skb, | |
0a40acb2 | 578 | struct netlink_callback *cb) |
4d12b8b1 LRV |
579 | { |
580 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
581 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
582 | bool first_call = false; | |
583 | ||
4d12b8b1 LRV |
584 | if (!iter) { |
585 | first_call = true; | |
586 | iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL); | |
587 | if (!iter) | |
588 | return -ENOMEM; | |
589 | cb->args[0] = (long) iter; | |
590 | } | |
591 | ||
592 | mutex_lock(&nfc_devlist_mutex); | |
593 | ||
594 | cb->seq = nfc_devlist_generation; | |
595 | ||
596 | if (first_call) { | |
597 | nfc_device_iter_init(iter); | |
598 | dev = nfc_device_iter_next(iter); | |
599 | } | |
600 | ||
601 | while (dev) { | |
602 | int rc; | |
603 | ||
15e47304 | 604 | rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid, |
0a40acb2 | 605 | cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); |
4d12b8b1 LRV |
606 | if (rc < 0) |
607 | break; | |
608 | ||
609 | dev = nfc_device_iter_next(iter); | |
610 | } | |
611 | ||
612 | mutex_unlock(&nfc_devlist_mutex); | |
613 | ||
614 | cb->args[1] = (long) dev; | |
615 | ||
616 | return skb->len; | |
617 | } | |
618 | ||
619 | static int nfc_genl_dump_devices_done(struct netlink_callback *cb) | |
620 | { | |
621 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
622 | ||
4d12b8b1 LRV |
623 | nfc_device_iter_exit(iter); |
624 | kfree(iter); | |
625 | ||
626 | return 0; | |
627 | } | |
628 | ||
1ed28f61 | 629 | int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx, |
0a40acb2 | 630 | u8 comm_mode, u8 rf_mode) |
1ed28f61 SO |
631 | { |
632 | struct sk_buff *msg; | |
633 | void *hdr; | |
634 | ||
635 | pr_debug("DEP link is up\n"); | |
636 | ||
58050fce | 637 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1ed28f61 SO |
638 | if (!msg) |
639 | return -ENOMEM; | |
640 | ||
0a40acb2 | 641 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP); |
1ed28f61 SO |
642 | if (!hdr) |
643 | goto free_msg; | |
644 | ||
1e6428d8 DM |
645 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
646 | goto nla_put_failure; | |
647 | if (rf_mode == NFC_RF_INITIATOR && | |
648 | nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx)) | |
649 | goto nla_put_failure; | |
650 | if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) || | |
651 | nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode)) | |
652 | goto nla_put_failure; | |
1ed28f61 SO |
653 | |
654 | genlmsg_end(msg, hdr); | |
655 | ||
656 | dev->dep_link_up = true; | |
657 | ||
2a94fe48 | 658 | genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); |
1ed28f61 SO |
659 | |
660 | return 0; | |
661 | ||
662 | nla_put_failure: | |
663 | genlmsg_cancel(msg, hdr); | |
664 | free_msg: | |
665 | nlmsg_free(msg); | |
666 | return -EMSGSIZE; | |
667 | } | |
668 | ||
669 | int nfc_genl_dep_link_down_event(struct nfc_dev *dev) | |
670 | { | |
671 | struct sk_buff *msg; | |
672 | void *hdr; | |
673 | ||
674 | pr_debug("DEP link is down\n"); | |
675 | ||
58050fce | 676 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1ed28f61 SO |
677 | if (!msg) |
678 | return -ENOMEM; | |
679 | ||
680 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
0a40acb2 | 681 | NFC_CMD_DEP_LINK_DOWN); |
1ed28f61 SO |
682 | if (!hdr) |
683 | goto free_msg; | |
684 | ||
1e6428d8 DM |
685 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
686 | goto nla_put_failure; | |
1ed28f61 SO |
687 | |
688 | genlmsg_end(msg, hdr); | |
689 | ||
2a94fe48 | 690 | genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); |
1ed28f61 SO |
691 | |
692 | return 0; | |
693 | ||
694 | nla_put_failure: | |
695 | genlmsg_cancel(msg, hdr); | |
696 | free_msg: | |
697 | nlmsg_free(msg); | |
698 | return -EMSGSIZE; | |
699 | } | |
700 | ||
4d12b8b1 LRV |
701 | static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info) |
702 | { | |
703 | struct sk_buff *msg; | |
704 | struct nfc_dev *dev; | |
705 | u32 idx; | |
706 | int rc = -ENOBUFS; | |
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 | ||
58050fce | 717 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
4d12b8b1 LRV |
718 | if (!msg) { |
719 | rc = -ENOMEM; | |
720 | goto out_putdev; | |
721 | } | |
722 | ||
15e47304 | 723 | rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq, |
0a40acb2 | 724 | NULL, 0); |
4d12b8b1 LRV |
725 | if (rc < 0) |
726 | goto out_free; | |
727 | ||
728 | nfc_put_device(dev); | |
729 | ||
730 | return genlmsg_reply(msg, info); | |
731 | ||
732 | out_free: | |
733 | nlmsg_free(msg); | |
734 | out_putdev: | |
735 | nfc_put_device(dev); | |
736 | return rc; | |
737 | } | |
738 | ||
8b3fe7b5 IE |
739 | static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info) |
740 | { | |
741 | struct nfc_dev *dev; | |
742 | int rc; | |
743 | u32 idx; | |
744 | ||
8b3fe7b5 IE |
745 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
746 | return -EINVAL; | |
747 | ||
748 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
749 | ||
750 | dev = nfc_get_device(idx); | |
751 | if (!dev) | |
752 | return -ENODEV; | |
753 | ||
754 | rc = nfc_dev_up(dev); | |
755 | ||
756 | nfc_put_device(dev); | |
757 | return rc; | |
758 | } | |
759 | ||
760 | static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info) | |
761 | { | |
762 | struct nfc_dev *dev; | |
763 | int rc; | |
764 | u32 idx; | |
765 | ||
8b3fe7b5 IE |
766 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
767 | return -EINVAL; | |
768 | ||
769 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
770 | ||
771 | dev = nfc_get_device(idx); | |
772 | if (!dev) | |
773 | return -ENODEV; | |
774 | ||
775 | rc = nfc_dev_down(dev); | |
776 | ||
777 | nfc_put_device(dev); | |
778 | return rc; | |
779 | } | |
780 | ||
4d12b8b1 LRV |
781 | static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info) |
782 | { | |
783 | struct nfc_dev *dev; | |
784 | int rc; | |
785 | u32 idx; | |
fe7c5800 | 786 | u32 im_protocols = 0, tm_protocols = 0; |
4d12b8b1 | 787 | |
1ed28f61 SO |
788 | pr_debug("Poll start\n"); |
789 | ||
4d12b8b1 | 790 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
fe7c5800 SO |
791 | ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] && |
792 | !info->attrs[NFC_ATTR_PROTOCOLS]) && | |
0f450772 | 793 | !info->attrs[NFC_ATTR_TM_PROTOCOLS])) |
4d12b8b1 LRV |
794 | return -EINVAL; |
795 | ||
796 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
fe7c5800 SO |
797 | |
798 | if (info->attrs[NFC_ATTR_TM_PROTOCOLS]) | |
799 | tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]); | |
fe7c5800 SO |
800 | |
801 | if (info->attrs[NFC_ATTR_IM_PROTOCOLS]) | |
802 | im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]); | |
5e50ee3a SO |
803 | else if (info->attrs[NFC_ATTR_PROTOCOLS]) |
804 | im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); | |
4d12b8b1 LRV |
805 | |
806 | dev = nfc_get_device(idx); | |
807 | if (!dev) | |
808 | return -ENODEV; | |
809 | ||
810 | mutex_lock(&dev->genl_data.genl_data_mutex); | |
811 | ||
fe7c5800 | 812 | rc = nfc_start_poll(dev, im_protocols, tm_protocols); |
4d12b8b1 | 813 | if (!rc) |
15e47304 | 814 | dev->genl_data.poll_req_portid = info->snd_portid; |
4d12b8b1 LRV |
815 | |
816 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
817 | ||
818 | nfc_put_device(dev); | |
819 | return rc; | |
820 | } | |
821 | ||
822 | static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info) | |
823 | { | |
824 | struct nfc_dev *dev; | |
825 | int rc; | |
826 | u32 idx; | |
827 | ||
4d12b8b1 LRV |
828 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
829 | return -EINVAL; | |
830 | ||
831 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
832 | ||
833 | dev = nfc_get_device(idx); | |
834 | if (!dev) | |
835 | return -ENODEV; | |
836 | ||
a831b913 SO |
837 | device_lock(&dev->dev); |
838 | ||
839 | if (!dev->polling) { | |
840 | device_unlock(&dev->dev); | |
841 | return -EINVAL; | |
842 | } | |
843 | ||
844 | device_unlock(&dev->dev); | |
845 | ||
4d12b8b1 LRV |
846 | mutex_lock(&dev->genl_data.genl_data_mutex); |
847 | ||
15e47304 | 848 | if (dev->genl_data.poll_req_portid != info->snd_portid) { |
4d12b8b1 LRV |
849 | rc = -EBUSY; |
850 | goto out; | |
851 | } | |
852 | ||
853 | rc = nfc_stop_poll(dev); | |
15e47304 | 854 | dev->genl_data.poll_req_portid = 0; |
4d12b8b1 LRV |
855 | |
856 | out: | |
857 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
858 | nfc_put_device(dev); | |
859 | return rc; | |
860 | } | |
861 | ||
3682f49f CR |
862 | static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info) |
863 | { | |
864 | struct nfc_dev *dev; | |
865 | u32 device_idx, target_idx, protocol; | |
866 | int rc; | |
867 | ||
868 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) | |
869 | return -EINVAL; | |
870 | ||
871 | device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
872 | ||
873 | dev = nfc_get_device(device_idx); | |
874 | if (!dev) | |
875 | return -ENODEV; | |
876 | ||
877 | target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); | |
878 | protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); | |
879 | ||
880 | nfc_deactivate_target(dev, target_idx); | |
881 | rc = nfc_activate_target(dev, target_idx, protocol); | |
882 | ||
883 | nfc_put_device(dev); | |
884 | return 0; | |
885 | } | |
886 | ||
1ed28f61 SO |
887 | static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info) |
888 | { | |
889 | struct nfc_dev *dev; | |
890 | int rc, tgt_idx; | |
891 | u32 idx; | |
47807d3d | 892 | u8 comm; |
1ed28f61 SO |
893 | |
894 | pr_debug("DEP link up\n"); | |
895 | ||
896 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
47807d3d | 897 | !info->attrs[NFC_ATTR_COMM_MODE]) |
1ed28f61 SO |
898 | return -EINVAL; |
899 | ||
900 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
901 | if (!info->attrs[NFC_ATTR_TARGET_INDEX]) | |
902 | tgt_idx = NFC_TARGET_IDX_ANY; | |
903 | else | |
904 | tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); | |
905 | ||
906 | comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]); | |
1ed28f61 SO |
907 | |
908 | if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE) | |
909 | return -EINVAL; | |
910 | ||
1ed28f61 SO |
911 | dev = nfc_get_device(idx); |
912 | if (!dev) | |
913 | return -ENODEV; | |
914 | ||
47807d3d | 915 | rc = nfc_dep_link_up(dev, tgt_idx, comm); |
1ed28f61 SO |
916 | |
917 | nfc_put_device(dev); | |
918 | ||
919 | return rc; | |
920 | } | |
921 | ||
922 | static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) | |
923 | { | |
924 | struct nfc_dev *dev; | |
925 | int rc; | |
926 | u32 idx; | |
927 | ||
928 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) | |
929 | return -EINVAL; | |
930 | ||
931 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
932 | ||
933 | dev = nfc_get_device(idx); | |
934 | if (!dev) | |
935 | return -ENODEV; | |
936 | ||
937 | rc = nfc_dep_link_down(dev); | |
938 | ||
939 | nfc_put_device(dev); | |
940 | return rc; | |
941 | } | |
942 | ||
52feb444 TE |
943 | static int nfc_genl_send_params(struct sk_buff *msg, |
944 | struct nfc_llcp_local *local, | |
945 | u32 portid, u32 seq) | |
946 | { | |
947 | void *hdr; | |
948 | ||
949 | hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0, | |
950 | NFC_CMD_LLC_GET_PARAMS); | |
951 | if (!hdr) | |
952 | return -EMSGSIZE; | |
953 | ||
954 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) || | |
955 | nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) || | |
956 | nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) || | |
957 | nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux))) | |
958 | goto nla_put_failure; | |
959 | ||
053c095a JB |
960 | genlmsg_end(msg, hdr); |
961 | return 0; | |
52feb444 TE |
962 | |
963 | nla_put_failure: | |
964 | ||
965 | genlmsg_cancel(msg, hdr); | |
966 | return -EMSGSIZE; | |
967 | } | |
968 | ||
969 | static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info) | |
970 | { | |
971 | struct nfc_dev *dev; | |
972 | struct nfc_llcp_local *local; | |
973 | int rc = 0; | |
974 | struct sk_buff *msg = NULL; | |
975 | u32 idx; | |
976 | ||
977 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) | |
978 | return -EINVAL; | |
979 | ||
980 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
981 | ||
982 | dev = nfc_get_device(idx); | |
983 | if (!dev) | |
984 | return -ENODEV; | |
985 | ||
986 | device_lock(&dev->dev); | |
987 | ||
988 | local = nfc_llcp_find_local(dev); | |
989 | if (!local) { | |
990 | rc = -ENODEV; | |
991 | goto exit; | |
992 | } | |
993 | ||
994 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
995 | if (!msg) { | |
996 | rc = -ENOMEM; | |
997 | goto exit; | |
998 | } | |
999 | ||
1000 | rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq); | |
1001 | ||
1002 | exit: | |
1003 | device_unlock(&dev->dev); | |
1004 | ||
1005 | nfc_put_device(dev); | |
1006 | ||
1007 | if (rc < 0) { | |
1008 | if (msg) | |
1009 | nlmsg_free(msg); | |
1010 | ||
1011 | return rc; | |
1012 | } | |
1013 | ||
1014 | return genlmsg_reply(msg, info); | |
1015 | } | |
1016 | ||
1017 | static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info) | |
1018 | { | |
1019 | struct nfc_dev *dev; | |
1020 | struct nfc_llcp_local *local; | |
1021 | u8 rw = 0; | |
1022 | u16 miux = 0; | |
1023 | u32 idx; | |
1024 | int rc = 0; | |
1025 | ||
1026 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
1027 | (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] && | |
1028 | !info->attrs[NFC_ATTR_LLC_PARAM_RW] && | |
1029 | !info->attrs[NFC_ATTR_LLC_PARAM_MIUX])) | |
1030 | return -EINVAL; | |
1031 | ||
1032 | if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) { | |
1033 | rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]); | |
1034 | ||
1035 | if (rw > LLCP_MAX_RW) | |
1036 | return -EINVAL; | |
1037 | } | |
1038 | ||
1039 | if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) { | |
1040 | miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]); | |
1041 | ||
1042 | if (miux > LLCP_MAX_MIUX) | |
1043 | return -EINVAL; | |
1044 | } | |
1045 | ||
1046 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
1047 | ||
1048 | dev = nfc_get_device(idx); | |
1049 | if (!dev) | |
1050 | return -ENODEV; | |
1051 | ||
1052 | device_lock(&dev->dev); | |
1053 | ||
1054 | local = nfc_llcp_find_local(dev); | |
1055 | if (!local) { | |
1056 | nfc_put_device(dev); | |
1057 | rc = -ENODEV; | |
1058 | goto exit; | |
1059 | } | |
1060 | ||
1061 | if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) { | |
1062 | if (dev->dep_link_up) { | |
1063 | rc = -EINPROGRESS; | |
1064 | goto exit; | |
1065 | } | |
1066 | ||
1067 | local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]); | |
1068 | } | |
1069 | ||
1070 | if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) | |
1071 | local->rw = rw; | |
1072 | ||
1073 | if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) | |
1074 | local->miux = cpu_to_be16(miux); | |
1075 | ||
1076 | exit: | |
1077 | device_unlock(&dev->dev); | |
1078 | ||
1079 | nfc_put_device(dev); | |
1080 | ||
1081 | return rc; | |
1082 | } | |
1083 | ||
d9b8d8e1 TE |
1084 | static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info) |
1085 | { | |
1086 | struct nfc_dev *dev; | |
1087 | struct nfc_llcp_local *local; | |
1088 | struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1]; | |
1089 | u32 idx; | |
1090 | u8 tid; | |
1091 | char *uri; | |
1092 | int rc = 0, rem; | |
1093 | size_t uri_len, tlvs_len; | |
1094 | struct hlist_head sdreq_list; | |
1095 | struct nfc_llcp_sdp_tlv *sdreq; | |
1096 | ||
1097 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
1098 | !info->attrs[NFC_ATTR_LLC_SDP]) | |
1099 | return -EINVAL; | |
1100 | ||
1101 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
1102 | ||
1103 | dev = nfc_get_device(idx); | |
1104 | if (!dev) { | |
1105 | rc = -ENODEV; | |
1106 | goto exit; | |
1107 | } | |
1108 | ||
1109 | device_lock(&dev->dev); | |
1110 | ||
1111 | if (dev->dep_link_up == false) { | |
1112 | rc = -ENOLINK; | |
1113 | goto exit; | |
1114 | } | |
1115 | ||
1116 | local = nfc_llcp_find_local(dev); | |
1117 | if (!local) { | |
1118 | nfc_put_device(dev); | |
1119 | rc = -ENODEV; | |
1120 | goto exit; | |
1121 | } | |
1122 | ||
1123 | INIT_HLIST_HEAD(&sdreq_list); | |
1124 | ||
1125 | tlvs_len = 0; | |
1126 | ||
1127 | nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) { | |
1128 | rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr, | |
1129 | nfc_sdp_genl_policy); | |
1130 | ||
1131 | if (rc != 0) { | |
1132 | rc = -EINVAL; | |
1133 | goto exit; | |
1134 | } | |
1135 | ||
1136 | if (!sdp_attrs[NFC_SDP_ATTR_URI]) | |
1137 | continue; | |
1138 | ||
1139 | uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]); | |
1140 | if (uri_len == 0) | |
1141 | continue; | |
1142 | ||
1143 | uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]); | |
1144 | if (uri == NULL || *uri == 0) | |
1145 | continue; | |
1146 | ||
1147 | tid = local->sdreq_next_tid++; | |
1148 | ||
1149 | sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len); | |
1150 | if (sdreq == NULL) { | |
1151 | rc = -ENOMEM; | |
1152 | goto exit; | |
1153 | } | |
1154 | ||
1155 | tlvs_len += sdreq->tlv_len; | |
1156 | ||
1157 | hlist_add_head(&sdreq->node, &sdreq_list); | |
1158 | } | |
1159 | ||
1160 | if (hlist_empty(&sdreq_list)) { | |
1161 | rc = -EINVAL; | |
1162 | goto exit; | |
1163 | } | |
1164 | ||
1165 | rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len); | |
1166 | exit: | |
1167 | device_unlock(&dev->dev); | |
1168 | ||
1169 | nfc_put_device(dev); | |
1170 | ||
1171 | return rc; | |
1172 | } | |
1173 | ||
9ea7187c | 1174 | static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info) |
9674da87 EL |
1175 | { |
1176 | struct nfc_dev *dev; | |
1177 | int rc; | |
1178 | u32 idx; | |
1179 | char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1]; | |
1180 | ||
1181 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) | |
1182 | return -EINVAL; | |
1183 | ||
1184 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
1185 | ||
1186 | dev = nfc_get_device(idx); | |
1187 | if (!dev) | |
1188 | return -ENODEV; | |
1189 | ||
1190 | nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME], | |
1191 | sizeof(firmware_name)); | |
1192 | ||
9ea7187c | 1193 | rc = nfc_fw_download(dev, firmware_name); |
9674da87 EL |
1194 | |
1195 | nfc_put_device(dev); | |
1196 | return rc; | |
1197 | } | |
1198 | ||
352a5f5f EL |
1199 | int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name, |
1200 | u32 result) | |
9674da87 EL |
1201 | { |
1202 | struct sk_buff *msg; | |
1203 | void *hdr; | |
1204 | ||
1205 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1206 | if (!msg) | |
1207 | return -ENOMEM; | |
1208 | ||
1209 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
9ea7187c | 1210 | NFC_CMD_FW_DOWNLOAD); |
9674da87 EL |
1211 | if (!hdr) |
1212 | goto free_msg; | |
1213 | ||
1214 | if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) || | |
352a5f5f | 1215 | nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) || |
9674da87 EL |
1216 | nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
1217 | goto nla_put_failure; | |
1218 | ||
1219 | genlmsg_end(msg, hdr); | |
1220 | ||
2a94fe48 | 1221 | genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
9674da87 EL |
1222 | |
1223 | return 0; | |
1224 | ||
1225 | nla_put_failure: | |
1226 | genlmsg_cancel(msg, hdr); | |
1227 | free_msg: | |
1228 | nlmsg_free(msg); | |
1229 | return -EMSGSIZE; | |
1230 | } | |
1231 | ||
be085653 SO |
1232 | static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info) |
1233 | { | |
1234 | struct nfc_dev *dev; | |
1235 | int rc; | |
1236 | u32 idx, se_idx; | |
1237 | ||
1238 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
1239 | !info->attrs[NFC_ATTR_SE_INDEX]) | |
1240 | return -EINVAL; | |
1241 | ||
1242 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
1243 | se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); | |
1244 | ||
1245 | dev = nfc_get_device(idx); | |
1246 | if (!dev) | |
1247 | return -ENODEV; | |
1248 | ||
1249 | rc = nfc_enable_se(dev, se_idx); | |
1250 | ||
1251 | nfc_put_device(dev); | |
1252 | return rc; | |
1253 | } | |
1254 | ||
1255 | static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info) | |
1256 | { | |
1257 | struct nfc_dev *dev; | |
1258 | int rc; | |
1259 | u32 idx, se_idx; | |
1260 | ||
1261 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
1262 | !info->attrs[NFC_ATTR_SE_INDEX]) | |
1263 | return -EINVAL; | |
1264 | ||
1265 | idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
1266 | se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); | |
1267 | ||
1268 | dev = nfc_get_device(idx); | |
1269 | if (!dev) | |
1270 | return -ENODEV; | |
1271 | ||
1272 | rc = nfc_disable_se(dev, se_idx); | |
1273 | ||
1274 | nfc_put_device(dev); | |
1275 | return rc; | |
1276 | } | |
1277 | ||
ac22ac46 SO |
1278 | static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev, |
1279 | u32 portid, u32 seq, | |
1280 | struct netlink_callback *cb, | |
1281 | int flags) | |
1282 | { | |
1283 | void *hdr; | |
1284 | struct nfc_se *se, *n; | |
1285 | ||
1286 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) { | |
1287 | hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags, | |
1288 | NFC_CMD_GET_SE); | |
1289 | if (!hdr) | |
1290 | goto nla_put_failure; | |
1291 | ||
1292 | if (cb) | |
1293 | genl_dump_check_consistent(cb, hdr, &nfc_genl_family); | |
1294 | ||
1295 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || | |
1296 | nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) || | |
1297 | nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type)) | |
1298 | goto nla_put_failure; | |
1299 | ||
053c095a | 1300 | genlmsg_end(msg, hdr); |
ac22ac46 SO |
1301 | } |
1302 | ||
1303 | return 0; | |
1304 | ||
1305 | nla_put_failure: | |
1306 | genlmsg_cancel(msg, hdr); | |
1307 | return -EMSGSIZE; | |
1308 | } | |
1309 | ||
1310 | static int nfc_genl_dump_ses(struct sk_buff *skb, | |
1311 | struct netlink_callback *cb) | |
1312 | { | |
1313 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
1314 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; | |
1315 | bool first_call = false; | |
1316 | ||
1317 | if (!iter) { | |
1318 | first_call = true; | |
1319 | iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL); | |
1320 | if (!iter) | |
1321 | return -ENOMEM; | |
1322 | cb->args[0] = (long) iter; | |
1323 | } | |
1324 | ||
1325 | mutex_lock(&nfc_devlist_mutex); | |
1326 | ||
1327 | cb->seq = nfc_devlist_generation; | |
1328 | ||
1329 | if (first_call) { | |
1330 | nfc_device_iter_init(iter); | |
1331 | dev = nfc_device_iter_next(iter); | |
1332 | } | |
1333 | ||
1334 | while (dev) { | |
1335 | int rc; | |
1336 | ||
1337 | rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid, | |
1338 | cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); | |
1339 | if (rc < 0) | |
1340 | break; | |
1341 | ||
1342 | dev = nfc_device_iter_next(iter); | |
1343 | } | |
1344 | ||
1345 | mutex_unlock(&nfc_devlist_mutex); | |
1346 | ||
1347 | cb->args[1] = (long) dev; | |
1348 | ||
1349 | return skb->len; | |
1350 | } | |
1351 | ||
1352 | static int nfc_genl_dump_ses_done(struct netlink_callback *cb) | |
1353 | { | |
1354 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; | |
1355 | ||
1356 | nfc_device_iter_exit(iter); | |
1357 | kfree(iter); | |
1358 | ||
1359 | return 0; | |
1360 | } | |
1361 | ||
cd96db6f CR |
1362 | static int nfc_se_io(struct nfc_dev *dev, u32 se_idx, |
1363 | u8 *apdu, size_t apdu_length, | |
1364 | se_io_cb_t cb, void *cb_context) | |
1365 | { | |
1366 | struct nfc_se *se; | |
1367 | int rc; | |
1368 | ||
1369 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
1370 | ||
1371 | device_lock(&dev->dev); | |
1372 | ||
1373 | if (!device_is_registered(&dev->dev)) { | |
1374 | rc = -ENODEV; | |
1375 | goto error; | |
1376 | } | |
1377 | ||
1378 | if (!dev->dev_up) { | |
1379 | rc = -ENODEV; | |
1380 | goto error; | |
1381 | } | |
1382 | ||
1383 | if (!dev->ops->se_io) { | |
1384 | rc = -EOPNOTSUPP; | |
1385 | goto error; | |
1386 | } | |
1387 | ||
1388 | se = nfc_find_se(dev, se_idx); | |
1389 | if (!se) { | |
1390 | rc = -EINVAL; | |
1391 | goto error; | |
1392 | } | |
1393 | ||
1394 | if (se->state != NFC_SE_ENABLED) { | |
1395 | rc = -ENODEV; | |
1396 | goto error; | |
1397 | } | |
1398 | ||
1399 | rc = dev->ops->se_io(dev, se_idx, apdu, | |
1400 | apdu_length, cb, cb_context); | |
1401 | ||
1402 | error: | |
1403 | device_unlock(&dev->dev); | |
1404 | return rc; | |
1405 | } | |
1406 | ||
5ce3f32b SO |
1407 | struct se_io_ctx { |
1408 | u32 dev_idx; | |
1409 | u32 se_idx; | |
1410 | }; | |
1411 | ||
ddc1a70b | 1412 | static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err) |
5ce3f32b SO |
1413 | { |
1414 | struct se_io_ctx *ctx = context; | |
1415 | struct sk_buff *msg; | |
1416 | void *hdr; | |
1417 | ||
1418 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1419 | if (!msg) { | |
1420 | kfree(ctx); | |
1421 | return; | |
1422 | } | |
1423 | ||
1424 | hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, | |
1425 | NFC_CMD_SE_IO); | |
1426 | if (!hdr) | |
1427 | goto free_msg; | |
1428 | ||
1429 | if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) || | |
1430 | nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) || | |
1431 | nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu)) | |
1432 | goto nla_put_failure; | |
1433 | ||
1434 | genlmsg_end(msg, hdr); | |
1435 | ||
2a94fe48 | 1436 | genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
5ce3f32b SO |
1437 | |
1438 | kfree(ctx); | |
1439 | ||
1440 | return; | |
1441 | ||
1442 | nla_put_failure: | |
1443 | genlmsg_cancel(msg, hdr); | |
1444 | free_msg: | |
1445 | nlmsg_free(msg); | |
1446 | kfree(ctx); | |
1447 | ||
1448 | return; | |
1449 | } | |
1450 | ||
1451 | static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info) | |
1452 | { | |
1453 | struct nfc_dev *dev; | |
1454 | struct se_io_ctx *ctx; | |
1455 | u32 dev_idx, se_idx; | |
1456 | u8 *apdu; | |
1457 | size_t apdu_len; | |
1458 | ||
1459 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || | |
1460 | !info->attrs[NFC_ATTR_SE_INDEX] || | |
1461 | !info->attrs[NFC_ATTR_SE_APDU]) | |
1462 | return -EINVAL; | |
1463 | ||
1464 | dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); | |
1465 | se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); | |
1466 | ||
1467 | dev = nfc_get_device(dev_idx); | |
1468 | if (!dev) | |
1469 | return -ENODEV; | |
1470 | ||
1471 | if (!dev->ops || !dev->ops->se_io) | |
1472 | return -ENOTSUPP; | |
1473 | ||
1474 | apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]); | |
1475 | if (apdu_len == 0) | |
1476 | return -EINVAL; | |
1477 | ||
1478 | apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]); | |
1479 | if (!apdu) | |
1480 | return -EINVAL; | |
1481 | ||
1482 | ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL); | |
1483 | if (!ctx) | |
1484 | return -ENOMEM; | |
1485 | ||
1486 | ctx->dev_idx = dev_idx; | |
1487 | ctx->se_idx = se_idx; | |
1488 | ||
cd96db6f | 1489 | return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx); |
5ce3f32b SO |
1490 | } |
1491 | ||
4534de83 | 1492 | static const struct genl_ops nfc_genl_ops[] = { |
4d12b8b1 LRV |
1493 | { |
1494 | .cmd = NFC_CMD_GET_DEVICE, | |
1495 | .doit = nfc_genl_get_device, | |
1496 | .dumpit = nfc_genl_dump_devices, | |
1497 | .done = nfc_genl_dump_devices_done, | |
1498 | .policy = nfc_genl_policy, | |
8b3fe7b5 IE |
1499 | }, |
1500 | { | |
1501 | .cmd = NFC_CMD_DEV_UP, | |
1502 | .doit = nfc_genl_dev_up, | |
1503 | .policy = nfc_genl_policy, | |
1504 | }, | |
1505 | { | |
1506 | .cmd = NFC_CMD_DEV_DOWN, | |
1507 | .doit = nfc_genl_dev_down, | |
1508 | .policy = nfc_genl_policy, | |
4d12b8b1 LRV |
1509 | }, |
1510 | { | |
1511 | .cmd = NFC_CMD_START_POLL, | |
1512 | .doit = nfc_genl_start_poll, | |
1513 | .policy = nfc_genl_policy, | |
1514 | }, | |
1515 | { | |
1516 | .cmd = NFC_CMD_STOP_POLL, | |
1517 | .doit = nfc_genl_stop_poll, | |
1518 | .policy = nfc_genl_policy, | |
1519 | }, | |
1ed28f61 SO |
1520 | { |
1521 | .cmd = NFC_CMD_DEP_LINK_UP, | |
1522 | .doit = nfc_genl_dep_link_up, | |
1523 | .policy = nfc_genl_policy, | |
1524 | }, | |
1525 | { | |
1526 | .cmd = NFC_CMD_DEP_LINK_DOWN, | |
1527 | .doit = nfc_genl_dep_link_down, | |
1528 | .policy = nfc_genl_policy, | |
1529 | }, | |
4d12b8b1 LRV |
1530 | { |
1531 | .cmd = NFC_CMD_GET_TARGET, | |
1532 | .dumpit = nfc_genl_dump_targets, | |
1533 | .done = nfc_genl_dump_targets_done, | |
1534 | .policy = nfc_genl_policy, | |
1535 | }, | |
52feb444 TE |
1536 | { |
1537 | .cmd = NFC_CMD_LLC_GET_PARAMS, | |
1538 | .doit = nfc_genl_llc_get_params, | |
1539 | .policy = nfc_genl_policy, | |
1540 | }, | |
1541 | { | |
1542 | .cmd = NFC_CMD_LLC_SET_PARAMS, | |
1543 | .doit = nfc_genl_llc_set_params, | |
1544 | .policy = nfc_genl_policy, | |
1545 | }, | |
d9b8d8e1 TE |
1546 | { |
1547 | .cmd = NFC_CMD_LLC_SDREQ, | |
1548 | .doit = nfc_genl_llc_sdreq, | |
1549 | .policy = nfc_genl_policy, | |
1550 | }, | |
9674da87 | 1551 | { |
9ea7187c SO |
1552 | .cmd = NFC_CMD_FW_DOWNLOAD, |
1553 | .doit = nfc_genl_fw_download, | |
9674da87 EL |
1554 | .policy = nfc_genl_policy, |
1555 | }, | |
be085653 SO |
1556 | { |
1557 | .cmd = NFC_CMD_ENABLE_SE, | |
1558 | .doit = nfc_genl_enable_se, | |
1559 | .policy = nfc_genl_policy, | |
1560 | }, | |
1561 | { | |
1562 | .cmd = NFC_CMD_DISABLE_SE, | |
1563 | .doit = nfc_genl_disable_se, | |
1564 | .policy = nfc_genl_policy, | |
1565 | }, | |
ac22ac46 SO |
1566 | { |
1567 | .cmd = NFC_CMD_GET_SE, | |
1568 | .dumpit = nfc_genl_dump_ses, | |
1569 | .done = nfc_genl_dump_ses_done, | |
1570 | .policy = nfc_genl_policy, | |
1571 | }, | |
5ce3f32b SO |
1572 | { |
1573 | .cmd = NFC_CMD_SE_IO, | |
1574 | .doit = nfc_genl_se_io, | |
1575 | .policy = nfc_genl_policy, | |
1576 | }, | |
3682f49f CR |
1577 | { |
1578 | .cmd = NFC_CMD_ACTIVATE_TARGET, | |
1579 | .doit = nfc_genl_activate_target, | |
1580 | .policy = nfc_genl_policy, | |
1581 | }, | |
4d12b8b1 LRV |
1582 | }; |
1583 | ||
3c0cc8aa SJ |
1584 | |
1585 | struct urelease_work { | |
1586 | struct work_struct w; | |
c487606f | 1587 | int portid; |
3c0cc8aa SJ |
1588 | }; |
1589 | ||
1590 | static void nfc_urelease_event_work(struct work_struct *work) | |
4d12b8b1 | 1591 | { |
3c0cc8aa | 1592 | struct urelease_work *w = container_of(work, struct urelease_work, w); |
4d12b8b1 LRV |
1593 | struct class_dev_iter iter; |
1594 | struct nfc_dev *dev; | |
1595 | ||
c487606f | 1596 | pr_debug("portid %d\n", w->portid); |
4d12b8b1 | 1597 | |
3c0cc8aa | 1598 | mutex_lock(&nfc_devlist_mutex); |
4d12b8b1 LRV |
1599 | |
1600 | nfc_device_iter_init(&iter); | |
1601 | dev = nfc_device_iter_next(&iter); | |
1602 | ||
1603 | while (dev) { | |
3c0cc8aa SJ |
1604 | mutex_lock(&dev->genl_data.genl_data_mutex); |
1605 | ||
c487606f | 1606 | if (dev->genl_data.poll_req_portid == w->portid) { |
4d12b8b1 | 1607 | nfc_stop_poll(dev); |
15e47304 | 1608 | dev->genl_data.poll_req_portid = 0; |
4d12b8b1 | 1609 | } |
3c0cc8aa SJ |
1610 | |
1611 | mutex_unlock(&dev->genl_data.genl_data_mutex); | |
1612 | ||
4d12b8b1 LRV |
1613 | dev = nfc_device_iter_next(&iter); |
1614 | } | |
1615 | ||
1616 | nfc_device_iter_exit(&iter); | |
1617 | ||
3c0cc8aa SJ |
1618 | mutex_unlock(&nfc_devlist_mutex); |
1619 | ||
1620 | kfree(w); | |
1621 | } | |
1622 | ||
1623 | static int nfc_genl_rcv_nl_event(struct notifier_block *this, | |
1624 | unsigned long event, void *ptr) | |
1625 | { | |
1626 | struct netlink_notify *n = ptr; | |
1627 | struct urelease_work *w; | |
1628 | ||
1629 | if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC) | |
1630 | goto out; | |
1631 | ||
c487606f | 1632 | pr_debug("NETLINK_URELEASE event from id %d\n", n->portid); |
3c0cc8aa SJ |
1633 | |
1634 | w = kmalloc(sizeof(*w), GFP_ATOMIC); | |
1635 | if (w) { | |
1636 | INIT_WORK((struct work_struct *) w, nfc_urelease_event_work); | |
c487606f | 1637 | w->portid = n->portid; |
3c0cc8aa SJ |
1638 | schedule_work((struct work_struct *) w); |
1639 | } | |
1640 | ||
4d12b8b1 LRV |
1641 | out: |
1642 | return NOTIFY_DONE; | |
1643 | } | |
1644 | ||
1645 | void nfc_genl_data_init(struct nfc_genl_data *genl_data) | |
1646 | { | |
15e47304 | 1647 | genl_data->poll_req_portid = 0; |
4d12b8b1 LRV |
1648 | mutex_init(&genl_data->genl_data_mutex); |
1649 | } | |
1650 | ||
1651 | void nfc_genl_data_exit(struct nfc_genl_data *genl_data) | |
1652 | { | |
1653 | mutex_destroy(&genl_data->genl_data_mutex); | |
1654 | } | |
1655 | ||
1656 | static struct notifier_block nl_notifier = { | |
1657 | .notifier_call = nfc_genl_rcv_nl_event, | |
1658 | }; | |
1659 | ||
1660 | /** | |
1661 | * nfc_genl_init() - Initialize netlink interface | |
1662 | * | |
1663 | * This initialization function registers the nfc netlink family. | |
1664 | */ | |
1665 | int __init nfc_genl_init(void) | |
1666 | { | |
1667 | int rc; | |
1668 | ||
2a94fe48 JB |
1669 | rc = genl_register_family_with_ops_groups(&nfc_genl_family, |
1670 | nfc_genl_ops, | |
1671 | nfc_genl_mcgrps); | |
4d12b8b1 LRV |
1672 | if (rc) |
1673 | return rc; | |
1674 | ||
4d12b8b1 LRV |
1675 | netlink_register_notifier(&nl_notifier); |
1676 | ||
2a94fe48 | 1677 | return 0; |
4d12b8b1 LRV |
1678 | } |
1679 | ||
1680 | /** | |
1681 | * nfc_genl_exit() - Deinitialize netlink interface | |
1682 | * | |
1683 | * This exit function unregisters the nfc netlink family. | |
1684 | */ | |
1685 | void nfc_genl_exit(void) | |
1686 | { | |
1687 | netlink_unregister_notifier(&nl_notifier); | |
1688 | genl_unregister_family(&nfc_genl_family); | |
1689 | } |