1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright (C) 2011 Instituto Nokia de Tecnologia |
4 | * |
5 | * Authors: |
6 | * Lauro Ramos Venancio <lauro.venancio@openbossa.org> |
7 | * Aloisio Almeida Jr <aloisio.almeida@openbossa.org> |
8 | * |
9 | * Vendor commands implementation based on net/wireless/nl80211.c |
10 | * which is: |
11 | * |
12 | * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> |
13 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
14 | */ |
15 | |
16 | #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ |
17 | |
18 | #include <net/genetlink.h> |
19 | #include <linux/nfc.h> |
20 | #include <linux/slab.h> |
21 | |
22 | #include "nfc.h" |
23 | #include "llcp.h" |
24 | |
25 | static const struct genl_multicast_group nfc_genl_mcgrps[] = { |
26 | { .name = NFC_GENL_MCAST_EVENT_NAME, }, |
27 | }; |
28 | |
29 | static struct genl_family nfc_genl_family; |
30 | static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = { |
31 | [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 }, |
32 | [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING, |
33 | .len = NFC_DEVICE_NAME_MAXSIZE }, |
34 | [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 }, |
35 | [NFC_ATTR_TARGET_INDEX] = { .type = NLA_U32 }, |
36 | [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 }, |
37 | [NFC_ATTR_RF_MODE] = { .type = NLA_U8 }, |
38 | [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 }, |
39 | [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 }, |
40 | [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 }, |
41 | [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 }, |
42 | [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 }, |
43 | [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 }, |
44 | [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED }, |
45 | [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING, |
46 | .len = NFC_FIRMWARE_NAME_MAXSIZE }, |
47 | [NFC_ATTR_SE_INDEX] = { .type = NLA_U32 }, |
48 | [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY }, |
49 | [NFC_ATTR_VENDOR_ID] = { .type = NLA_U32 }, |
50 | [NFC_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 }, |
51 | [NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY }, |
52 | |
53 | }; |
54 | |
55 | static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = { |
56 | [NFC_SDP_ATTR_URI] = { .type = NLA_STRING, |
57 | .len = U8_MAX - 4 }, |
58 | [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 }, |
59 | }; |
60 | |
61 | static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target, |
62 | struct netlink_callback *cb, int flags) |
63 | { |
64 | void *hdr; |
65 | |
66 | hdr = genlmsg_put(skb: msg, NETLINK_CB(cb->skb).portid, seq: cb->nlh->nlmsg_seq, |
67 | family: &nfc_genl_family, flags, cmd: NFC_CMD_GET_TARGET); |
68 | if (!hdr) |
69 | return -EMSGSIZE; |
70 | |
71 | genl_dump_check_consistent(cb, user_hdr: hdr); |
72 | |
73 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_TARGET_INDEX, value: target->idx) || |
74 | nla_put_u32(skb: msg, attrtype: NFC_ATTR_PROTOCOLS, value: target->supported_protocols) || |
75 | nla_put_u16(skb: msg, attrtype: NFC_ATTR_TARGET_SENS_RES, value: target->sens_res) || |
76 | nla_put_u8(skb: msg, attrtype: NFC_ATTR_TARGET_SEL_RES, value: target->sel_res)) |
77 | goto nla_put_failure; |
78 | if (target->nfcid1_len > 0 && |
79 | nla_put(skb: msg, attrtype: NFC_ATTR_TARGET_NFCID1, attrlen: target->nfcid1_len, |
80 | data: target->nfcid1)) |
81 | goto nla_put_failure; |
82 | if (target->sensb_res_len > 0 && |
83 | nla_put(skb: msg, attrtype: NFC_ATTR_TARGET_SENSB_RES, attrlen: target->sensb_res_len, |
84 | data: target->sensb_res)) |
85 | goto nla_put_failure; |
86 | if (target->sensf_res_len > 0 && |
87 | nla_put(skb: msg, attrtype: NFC_ATTR_TARGET_SENSF_RES, attrlen: target->sensf_res_len, |
88 | data: target->sensf_res)) |
89 | goto nla_put_failure; |
90 | |
91 | if (target->is_iso15693) { |
92 | if (nla_put_u8(skb: msg, attrtype: NFC_ATTR_TARGET_ISO15693_DSFID, |
93 | value: target->iso15693_dsfid) || |
94 | nla_put(skb: msg, attrtype: NFC_ATTR_TARGET_ISO15693_UID, |
95 | attrlen: sizeof(target->iso15693_uid), data: target->iso15693_uid)) |
96 | goto nla_put_failure; |
97 | } |
98 | |
99 | genlmsg_end(skb: msg, hdr); |
100 | return 0; |
101 | |
102 | nla_put_failure: |
103 | genlmsg_cancel(skb: msg, hdr); |
104 | return -EMSGSIZE; |
105 | } |
106 | |
107 | static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb) |
108 | { |
109 | const struct genl_dumpit_info *info = genl_dumpit_info(cb); |
110 | struct nfc_dev *dev; |
111 | u32 idx; |
112 | |
113 | if (!info->info.attrs[NFC_ATTR_DEVICE_INDEX]) |
114 | return ERR_PTR(error: -EINVAL); |
115 | |
116 | idx = nla_get_u32(nla: info->info.attrs[NFC_ATTR_DEVICE_INDEX]); |
117 | |
118 | dev = nfc_get_device(idx); |
119 | if (!dev) |
120 | return ERR_PTR(error: -ENODEV); |
121 | |
122 | return dev; |
123 | } |
124 | |
125 | static int nfc_genl_dump_targets(struct sk_buff *skb, |
126 | struct netlink_callback *cb) |
127 | { |
128 | int i = cb->args[0]; |
129 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; |
130 | int rc; |
131 | |
132 | if (!dev) { |
133 | dev = __get_device_from_cb(cb); |
134 | if (IS_ERR(ptr: dev)) |
135 | return PTR_ERR(ptr: dev); |
136 | |
137 | cb->args[1] = (long) dev; |
138 | } |
139 | |
140 | device_lock(dev: &dev->dev); |
141 | |
142 | cb->seq = dev->targets_generation; |
143 | |
144 | while (i < dev->n_targets) { |
145 | rc = nfc_genl_send_target(msg: skb, target: &dev->targets[i], cb, |
146 | NLM_F_MULTI); |
147 | if (rc < 0) |
148 | break; |
149 | |
150 | i++; |
151 | } |
152 | |
153 | device_unlock(dev: &dev->dev); |
154 | |
155 | cb->args[0] = i; |
156 | |
157 | return skb->len; |
158 | } |
159 | |
160 | static int nfc_genl_dump_targets_done(struct netlink_callback *cb) |
161 | { |
162 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; |
163 | |
164 | if (dev) |
165 | nfc_put_device(dev); |
166 | |
167 | return 0; |
168 | } |
169 | |
170 | int nfc_genl_targets_found(struct nfc_dev *dev) |
171 | { |
172 | struct sk_buff *msg; |
173 | void *hdr; |
174 | |
175 | dev->genl_data.poll_req_portid = 0; |
176 | |
177 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
178 | if (!msg) |
179 | return -ENOMEM; |
180 | |
181 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
182 | cmd: NFC_EVENT_TARGETS_FOUND); |
183 | if (!hdr) |
184 | goto free_msg; |
185 | |
186 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx)) |
187 | goto nla_put_failure; |
188 | |
189 | genlmsg_end(skb: msg, hdr); |
190 | |
191 | return genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_ATOMIC); |
192 | |
193 | nla_put_failure: |
194 | free_msg: |
195 | nlmsg_free(skb: msg); |
196 | return -EMSGSIZE; |
197 | } |
198 | |
199 | int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx) |
200 | { |
201 | struct sk_buff *msg; |
202 | void *hdr; |
203 | |
204 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
205 | if (!msg) |
206 | return -ENOMEM; |
207 | |
208 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
209 | cmd: NFC_EVENT_TARGET_LOST); |
210 | if (!hdr) |
211 | goto free_msg; |
212 | |
213 | if (nla_put_string(skb: msg, attrtype: NFC_ATTR_DEVICE_NAME, str: nfc_device_name(dev)) || |
214 | nla_put_u32(skb: msg, attrtype: NFC_ATTR_TARGET_INDEX, value: target_idx)) |
215 | goto nla_put_failure; |
216 | |
217 | genlmsg_end(skb: msg, hdr); |
218 | |
219 | genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_KERNEL); |
220 | |
221 | return 0; |
222 | |
223 | nla_put_failure: |
224 | free_msg: |
225 | nlmsg_free(skb: msg); |
226 | return -EMSGSIZE; |
227 | } |
228 | |
229 | int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol) |
230 | { |
231 | struct sk_buff *msg; |
232 | void *hdr; |
233 | |
234 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
235 | if (!msg) |
236 | return -ENOMEM; |
237 | |
238 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
239 | cmd: NFC_EVENT_TM_ACTIVATED); |
240 | if (!hdr) |
241 | goto free_msg; |
242 | |
243 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx)) |
244 | goto nla_put_failure; |
245 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_TM_PROTOCOLS, value: protocol)) |
246 | goto nla_put_failure; |
247 | |
248 | genlmsg_end(skb: msg, hdr); |
249 | |
250 | genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_KERNEL); |
251 | |
252 | return 0; |
253 | |
254 | nla_put_failure: |
255 | free_msg: |
256 | nlmsg_free(skb: msg); |
257 | return -EMSGSIZE; |
258 | } |
259 | |
260 | int nfc_genl_tm_deactivated(struct nfc_dev *dev) |
261 | { |
262 | struct sk_buff *msg; |
263 | void *hdr; |
264 | |
265 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
266 | if (!msg) |
267 | return -ENOMEM; |
268 | |
269 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
270 | cmd: NFC_EVENT_TM_DEACTIVATED); |
271 | if (!hdr) |
272 | goto free_msg; |
273 | |
274 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx)) |
275 | goto nla_put_failure; |
276 | |
277 | genlmsg_end(skb: msg, hdr); |
278 | |
279 | genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_KERNEL); |
280 | |
281 | return 0; |
282 | |
283 | nla_put_failure: |
284 | free_msg: |
285 | nlmsg_free(skb: msg); |
286 | return -EMSGSIZE; |
287 | } |
288 | |
289 | static int nfc_genl_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg) |
290 | { |
291 | if (nla_put_string(skb: msg, attrtype: NFC_ATTR_DEVICE_NAME, str: nfc_device_name(dev)) || |
292 | nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx) || |
293 | nla_put_u32(skb: msg, attrtype: NFC_ATTR_PROTOCOLS, value: dev->supported_protocols) || |
294 | nla_put_u8(skb: msg, attrtype: NFC_ATTR_DEVICE_POWERED, value: dev->dev_up) || |
295 | nla_put_u8(skb: msg, attrtype: NFC_ATTR_RF_MODE, value: dev->rf_mode)) |
296 | return -1; |
297 | return 0; |
298 | } |
299 | |
300 | int nfc_genl_device_added(struct nfc_dev *dev) |
301 | { |
302 | struct sk_buff *msg; |
303 | void *hdr; |
304 | |
305 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
306 | if (!msg) |
307 | return -ENOMEM; |
308 | |
309 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
310 | cmd: NFC_EVENT_DEVICE_ADDED); |
311 | if (!hdr) |
312 | goto free_msg; |
313 | |
314 | if (nfc_genl_setup_device_added(dev, msg)) |
315 | goto nla_put_failure; |
316 | |
317 | genlmsg_end(skb: msg, hdr); |
318 | |
319 | genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_KERNEL); |
320 | |
321 | return 0; |
322 | |
323 | nla_put_failure: |
324 | free_msg: |
325 | nlmsg_free(skb: 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 | |
334 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
335 | if (!msg) |
336 | return -ENOMEM; |
337 | |
338 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
339 | cmd: NFC_EVENT_DEVICE_REMOVED); |
340 | if (!hdr) |
341 | goto free_msg; |
342 | |
343 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx)) |
344 | goto nla_put_failure; |
345 | |
346 | genlmsg_end(skb: msg, hdr); |
347 | |
348 | genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_KERNEL); |
349 | |
350 | return 0; |
351 | |
352 | nla_put_failure: |
353 | free_msg: |
354 | nlmsg_free(skb: msg); |
355 | return -EMSGSIZE; |
356 | } |
357 | |
358 | int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list) |
359 | { |
360 | struct sk_buff *msg; |
361 | struct nlattr *sdp_attr, *uri_attr; |
362 | struct nfc_llcp_sdp_tlv *sdres; |
363 | struct hlist_node *n; |
364 | void *hdr; |
365 | int rc = -EMSGSIZE; |
366 | int i; |
367 | |
368 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
369 | if (!msg) |
370 | return -ENOMEM; |
371 | |
372 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
373 | cmd: NFC_EVENT_LLC_SDRES); |
374 | if (!hdr) |
375 | goto free_msg; |
376 | |
377 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx)) |
378 | goto nla_put_failure; |
379 | |
380 | sdp_attr = nla_nest_start_noflag(skb: msg, attrtype: NFC_ATTR_LLC_SDP); |
381 | if (sdp_attr == NULL) { |
382 | rc = -ENOMEM; |
383 | goto nla_put_failure; |
384 | } |
385 | |
386 | i = 1; |
387 | hlist_for_each_entry_safe(sdres, n, sdres_list, node) { |
388 | pr_debug("uri: %s, sap: %d\n" , sdres->uri, sdres->sap); |
389 | |
390 | uri_attr = nla_nest_start_noflag(skb: msg, attrtype: i++); |
391 | if (uri_attr == NULL) { |
392 | rc = -ENOMEM; |
393 | goto nla_put_failure; |
394 | } |
395 | |
396 | if (nla_put_u8(skb: msg, attrtype: NFC_SDP_ATTR_SAP, value: sdres->sap)) |
397 | goto nla_put_failure; |
398 | |
399 | if (nla_put_string(skb: msg, attrtype: NFC_SDP_ATTR_URI, str: sdres->uri)) |
400 | goto nla_put_failure; |
401 | |
402 | nla_nest_end(skb: msg, start: uri_attr); |
403 | |
404 | hlist_del(n: &sdres->node); |
405 | |
406 | nfc_llcp_free_sdp_tlv(sdp: sdres); |
407 | } |
408 | |
409 | nla_nest_end(skb: msg, start: sdp_attr); |
410 | |
411 | genlmsg_end(skb: msg, hdr); |
412 | |
413 | return genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_ATOMIC); |
414 | |
415 | nla_put_failure: |
416 | free_msg: |
417 | nlmsg_free(skb: msg); |
418 | |
419 | nfc_llcp_free_sdp_tlv_list(sdp_head: sdres_list); |
420 | |
421 | return rc; |
422 | } |
423 | |
424 | int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type) |
425 | { |
426 | struct sk_buff *msg; |
427 | void *hdr; |
428 | |
429 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
430 | if (!msg) |
431 | return -ENOMEM; |
432 | |
433 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
434 | cmd: NFC_EVENT_SE_ADDED); |
435 | if (!hdr) |
436 | goto free_msg; |
437 | |
438 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx) || |
439 | nla_put_u32(skb: msg, attrtype: NFC_ATTR_SE_INDEX, value: se_idx) || |
440 | nla_put_u8(skb: msg, attrtype: NFC_ATTR_SE_TYPE, value: type)) |
441 | goto nla_put_failure; |
442 | |
443 | genlmsg_end(skb: msg, hdr); |
444 | |
445 | genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_KERNEL); |
446 | |
447 | return 0; |
448 | |
449 | nla_put_failure: |
450 | free_msg: |
451 | nlmsg_free(skb: msg); |
452 | return -EMSGSIZE; |
453 | } |
454 | |
455 | int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx) |
456 | { |
457 | struct sk_buff *msg; |
458 | void *hdr; |
459 | |
460 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
461 | if (!msg) |
462 | return -ENOMEM; |
463 | |
464 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
465 | cmd: NFC_EVENT_SE_REMOVED); |
466 | if (!hdr) |
467 | goto free_msg; |
468 | |
469 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx) || |
470 | nla_put_u32(skb: msg, attrtype: NFC_ATTR_SE_INDEX, value: se_idx)) |
471 | goto nla_put_failure; |
472 | |
473 | genlmsg_end(skb: msg, hdr); |
474 | |
475 | genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_KERNEL); |
476 | |
477 | return 0; |
478 | |
479 | nla_put_failure: |
480 | free_msg: |
481 | nlmsg_free(skb: msg); |
482 | return -EMSGSIZE; |
483 | } |
484 | |
485 | int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx, |
486 | struct nfc_evt_transaction *evt_transaction) |
487 | { |
488 | struct nfc_se *se; |
489 | struct sk_buff *msg; |
490 | void *hdr; |
491 | |
492 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
493 | if (!msg) |
494 | return -ENOMEM; |
495 | |
496 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
497 | cmd: NFC_EVENT_SE_TRANSACTION); |
498 | if (!hdr) |
499 | goto free_msg; |
500 | |
501 | se = nfc_find_se(dev, se_idx); |
502 | if (!se) |
503 | goto free_msg; |
504 | |
505 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx) || |
506 | nla_put_u32(skb: msg, attrtype: NFC_ATTR_SE_INDEX, value: se_idx) || |
507 | nla_put_u8(skb: msg, attrtype: NFC_ATTR_SE_TYPE, value: se->type) || |
508 | nla_put(skb: msg, attrtype: NFC_ATTR_SE_AID, attrlen: evt_transaction->aid_len, |
509 | data: evt_transaction->aid) || |
510 | nla_put(skb: msg, attrtype: NFC_ATTR_SE_PARAMS, attrlen: evt_transaction->params_len, |
511 | data: evt_transaction->params)) |
512 | goto nla_put_failure; |
513 | |
514 | /* evt_transaction is no more used */ |
515 | devm_kfree(dev: &dev->dev, p: evt_transaction); |
516 | |
517 | genlmsg_end(skb: msg, hdr); |
518 | |
519 | genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_KERNEL); |
520 | |
521 | return 0; |
522 | |
523 | nla_put_failure: |
524 | free_msg: |
525 | /* evt_transaction is no more used */ |
526 | devm_kfree(dev: &dev->dev, p: evt_transaction); |
527 | nlmsg_free(skb: msg); |
528 | return -EMSGSIZE; |
529 | } |
530 | |
531 | int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx) |
532 | { |
533 | const struct nfc_se *se; |
534 | struct sk_buff *msg; |
535 | void *hdr; |
536 | |
537 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
538 | if (!msg) |
539 | return -ENOMEM; |
540 | |
541 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
542 | cmd: NFC_EVENT_SE_CONNECTIVITY); |
543 | if (!hdr) |
544 | goto free_msg; |
545 | |
546 | se = nfc_find_se(dev, se_idx); |
547 | if (!se) |
548 | goto free_msg; |
549 | |
550 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx) || |
551 | nla_put_u32(skb: msg, attrtype: NFC_ATTR_SE_INDEX, value: se_idx) || |
552 | nla_put_u8(skb: msg, attrtype: NFC_ATTR_SE_TYPE, value: se->type)) |
553 | goto nla_put_failure; |
554 | |
555 | genlmsg_end(skb: msg, hdr); |
556 | |
557 | genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_KERNEL); |
558 | |
559 | return 0; |
560 | |
561 | nla_put_failure: |
562 | free_msg: |
563 | nlmsg_free(skb: msg); |
564 | return -EMSGSIZE; |
565 | } |
566 | |
567 | static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev, |
568 | u32 portid, u32 seq, |
569 | struct netlink_callback *cb, |
570 | int flags) |
571 | { |
572 | void *hdr; |
573 | |
574 | hdr = genlmsg_put(skb: msg, portid, seq, family: &nfc_genl_family, flags, |
575 | cmd: NFC_CMD_GET_DEVICE); |
576 | if (!hdr) |
577 | return -EMSGSIZE; |
578 | |
579 | if (cb) |
580 | genl_dump_check_consistent(cb, user_hdr: hdr); |
581 | |
582 | if (nfc_genl_setup_device_added(dev, msg)) |
583 | goto nla_put_failure; |
584 | |
585 | genlmsg_end(skb: msg, hdr); |
586 | return 0; |
587 | |
588 | nla_put_failure: |
589 | genlmsg_cancel(skb: msg, hdr); |
590 | return -EMSGSIZE; |
591 | } |
592 | |
593 | static int nfc_genl_dump_devices(struct sk_buff *skb, |
594 | struct netlink_callback *cb) |
595 | { |
596 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; |
597 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; |
598 | bool first_call = false; |
599 | |
600 | if (!iter) { |
601 | first_call = true; |
602 | iter = kmalloc(size: sizeof(struct class_dev_iter), GFP_KERNEL); |
603 | if (!iter) |
604 | return -ENOMEM; |
605 | cb->args[0] = (long) iter; |
606 | } |
607 | |
608 | mutex_lock(&nfc_devlist_mutex); |
609 | |
610 | cb->seq = nfc_devlist_generation; |
611 | |
612 | if (first_call) { |
613 | nfc_device_iter_init(iter); |
614 | dev = nfc_device_iter_next(iter); |
615 | } |
616 | |
617 | while (dev) { |
618 | int rc; |
619 | |
620 | rc = nfc_genl_send_device(msg: skb, dev, NETLINK_CB(cb->skb).portid, |
621 | seq: cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); |
622 | if (rc < 0) |
623 | break; |
624 | |
625 | dev = nfc_device_iter_next(iter); |
626 | } |
627 | |
628 | mutex_unlock(lock: &nfc_devlist_mutex); |
629 | |
630 | cb->args[1] = (long) dev; |
631 | |
632 | return skb->len; |
633 | } |
634 | |
635 | static int nfc_genl_dump_devices_done(struct netlink_callback *cb) |
636 | { |
637 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; |
638 | |
639 | if (iter) { |
640 | nfc_device_iter_exit(iter); |
641 | kfree(objp: iter); |
642 | } |
643 | |
644 | return 0; |
645 | } |
646 | |
647 | int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx, |
648 | u8 comm_mode, u8 rf_mode) |
649 | { |
650 | struct sk_buff *msg; |
651 | void *hdr; |
652 | |
653 | pr_debug("DEP link is up\n" ); |
654 | |
655 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
656 | if (!msg) |
657 | return -ENOMEM; |
658 | |
659 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, cmd: NFC_CMD_DEP_LINK_UP); |
660 | if (!hdr) |
661 | goto free_msg; |
662 | |
663 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx)) |
664 | goto nla_put_failure; |
665 | if (rf_mode == NFC_RF_INITIATOR && |
666 | nla_put_u32(skb: msg, attrtype: NFC_ATTR_TARGET_INDEX, value: target_idx)) |
667 | goto nla_put_failure; |
668 | if (nla_put_u8(skb: msg, attrtype: NFC_ATTR_COMM_MODE, value: comm_mode) || |
669 | nla_put_u8(skb: msg, attrtype: NFC_ATTR_RF_MODE, value: rf_mode)) |
670 | goto nla_put_failure; |
671 | |
672 | genlmsg_end(skb: msg, hdr); |
673 | |
674 | dev->dep_link_up = true; |
675 | |
676 | genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_ATOMIC); |
677 | |
678 | return 0; |
679 | |
680 | nla_put_failure: |
681 | free_msg: |
682 | nlmsg_free(skb: msg); |
683 | return -EMSGSIZE; |
684 | } |
685 | |
686 | int nfc_genl_dep_link_down_event(struct nfc_dev *dev) |
687 | { |
688 | struct sk_buff *msg; |
689 | void *hdr; |
690 | |
691 | pr_debug("DEP link is down\n" ); |
692 | |
693 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
694 | if (!msg) |
695 | return -ENOMEM; |
696 | |
697 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
698 | cmd: NFC_CMD_DEP_LINK_DOWN); |
699 | if (!hdr) |
700 | goto free_msg; |
701 | |
702 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx)) |
703 | goto nla_put_failure; |
704 | |
705 | genlmsg_end(skb: msg, hdr); |
706 | |
707 | genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_ATOMIC); |
708 | |
709 | return 0; |
710 | |
711 | nla_put_failure: |
712 | free_msg: |
713 | nlmsg_free(skb: msg); |
714 | return -EMSGSIZE; |
715 | } |
716 | |
717 | static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info) |
718 | { |
719 | struct sk_buff *msg; |
720 | struct nfc_dev *dev; |
721 | u32 idx; |
722 | int rc = -ENOBUFS; |
723 | |
724 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
725 | return -EINVAL; |
726 | |
727 | idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
728 | |
729 | dev = nfc_get_device(idx); |
730 | if (!dev) |
731 | return -ENODEV; |
732 | |
733 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
734 | if (!msg) { |
735 | rc = -ENOMEM; |
736 | goto out_putdev; |
737 | } |
738 | |
739 | rc = nfc_genl_send_device(msg, dev, portid: info->snd_portid, seq: info->snd_seq, |
740 | NULL, flags: 0); |
741 | if (rc < 0) |
742 | goto out_free; |
743 | |
744 | nfc_put_device(dev); |
745 | |
746 | return genlmsg_reply(skb: msg, info); |
747 | |
748 | out_free: |
749 | nlmsg_free(skb: msg); |
750 | out_putdev: |
751 | nfc_put_device(dev); |
752 | return rc; |
753 | } |
754 | |
755 | static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info) |
756 | { |
757 | struct nfc_dev *dev; |
758 | int rc; |
759 | u32 idx; |
760 | |
761 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
762 | return -EINVAL; |
763 | |
764 | idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
765 | |
766 | dev = nfc_get_device(idx); |
767 | if (!dev) |
768 | return -ENODEV; |
769 | |
770 | rc = nfc_dev_up(dev); |
771 | |
772 | nfc_put_device(dev); |
773 | return rc; |
774 | } |
775 | |
776 | static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info) |
777 | { |
778 | struct nfc_dev *dev; |
779 | int rc; |
780 | u32 idx; |
781 | |
782 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
783 | return -EINVAL; |
784 | |
785 | idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
786 | |
787 | dev = nfc_get_device(idx); |
788 | if (!dev) |
789 | return -ENODEV; |
790 | |
791 | rc = nfc_dev_down(dev); |
792 | |
793 | nfc_put_device(dev); |
794 | return rc; |
795 | } |
796 | |
797 | static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info) |
798 | { |
799 | struct nfc_dev *dev; |
800 | int rc; |
801 | u32 idx; |
802 | u32 im_protocols = 0, tm_protocols = 0; |
803 | |
804 | pr_debug("Poll start\n" ); |
805 | |
806 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
807 | ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] && |
808 | !info->attrs[NFC_ATTR_PROTOCOLS]) && |
809 | !info->attrs[NFC_ATTR_TM_PROTOCOLS])) |
810 | return -EINVAL; |
811 | |
812 | idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
813 | |
814 | if (info->attrs[NFC_ATTR_TM_PROTOCOLS]) |
815 | tm_protocols = nla_get_u32(nla: info->attrs[NFC_ATTR_TM_PROTOCOLS]); |
816 | |
817 | if (info->attrs[NFC_ATTR_IM_PROTOCOLS]) |
818 | im_protocols = nla_get_u32(nla: info->attrs[NFC_ATTR_IM_PROTOCOLS]); |
819 | else if (info->attrs[NFC_ATTR_PROTOCOLS]) |
820 | im_protocols = nla_get_u32(nla: info->attrs[NFC_ATTR_PROTOCOLS]); |
821 | |
822 | dev = nfc_get_device(idx); |
823 | if (!dev) |
824 | return -ENODEV; |
825 | |
826 | mutex_lock(&dev->genl_data.genl_data_mutex); |
827 | |
828 | rc = nfc_start_poll(dev, im_protocols, tm_protocols); |
829 | if (!rc) |
830 | dev->genl_data.poll_req_portid = info->snd_portid; |
831 | |
832 | mutex_unlock(lock: &dev->genl_data.genl_data_mutex); |
833 | |
834 | nfc_put_device(dev); |
835 | return rc; |
836 | } |
837 | |
838 | static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info) |
839 | { |
840 | struct nfc_dev *dev; |
841 | int rc; |
842 | u32 idx; |
843 | |
844 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
845 | return -EINVAL; |
846 | |
847 | idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
848 | |
849 | dev = nfc_get_device(idx); |
850 | if (!dev) |
851 | return -ENODEV; |
852 | |
853 | device_lock(dev: &dev->dev); |
854 | |
855 | if (!dev->polling) { |
856 | device_unlock(dev: &dev->dev); |
857 | nfc_put_device(dev); |
858 | return -EINVAL; |
859 | } |
860 | |
861 | device_unlock(dev: &dev->dev); |
862 | |
863 | mutex_lock(&dev->genl_data.genl_data_mutex); |
864 | |
865 | if (dev->genl_data.poll_req_portid != info->snd_portid) { |
866 | rc = -EBUSY; |
867 | goto out; |
868 | } |
869 | |
870 | rc = nfc_stop_poll(dev); |
871 | dev->genl_data.poll_req_portid = 0; |
872 | |
873 | out: |
874 | mutex_unlock(lock: &dev->genl_data.genl_data_mutex); |
875 | nfc_put_device(dev); |
876 | return rc; |
877 | } |
878 | |
879 | static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info) |
880 | { |
881 | struct nfc_dev *dev; |
882 | u32 device_idx, target_idx, protocol; |
883 | int rc; |
884 | |
885 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
886 | !info->attrs[NFC_ATTR_TARGET_INDEX] || |
887 | !info->attrs[NFC_ATTR_PROTOCOLS]) |
888 | return -EINVAL; |
889 | |
890 | device_idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
891 | |
892 | dev = nfc_get_device(idx: device_idx); |
893 | if (!dev) |
894 | return -ENODEV; |
895 | |
896 | target_idx = nla_get_u32(nla: info->attrs[NFC_ATTR_TARGET_INDEX]); |
897 | protocol = nla_get_u32(nla: info->attrs[NFC_ATTR_PROTOCOLS]); |
898 | |
899 | nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP); |
900 | rc = nfc_activate_target(dev, target_idx, protocol); |
901 | |
902 | nfc_put_device(dev); |
903 | return rc; |
904 | } |
905 | |
906 | static int nfc_genl_deactivate_target(struct sk_buff *skb, |
907 | struct genl_info *info) |
908 | { |
909 | struct nfc_dev *dev; |
910 | u32 device_idx, target_idx; |
911 | int rc; |
912 | |
913 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
914 | !info->attrs[NFC_ATTR_TARGET_INDEX]) |
915 | return -EINVAL; |
916 | |
917 | device_idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
918 | |
919 | dev = nfc_get_device(idx: device_idx); |
920 | if (!dev) |
921 | return -ENODEV; |
922 | |
923 | target_idx = nla_get_u32(nla: info->attrs[NFC_ATTR_TARGET_INDEX]); |
924 | |
925 | rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP); |
926 | |
927 | nfc_put_device(dev); |
928 | return rc; |
929 | } |
930 | |
931 | static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info) |
932 | { |
933 | struct nfc_dev *dev; |
934 | int rc, tgt_idx; |
935 | u32 idx; |
936 | u8 comm; |
937 | |
938 | pr_debug("DEP link up\n" ); |
939 | |
940 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
941 | !info->attrs[NFC_ATTR_COMM_MODE]) |
942 | return -EINVAL; |
943 | |
944 | idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
945 | if (!info->attrs[NFC_ATTR_TARGET_INDEX]) |
946 | tgt_idx = NFC_TARGET_IDX_ANY; |
947 | else |
948 | tgt_idx = nla_get_u32(nla: info->attrs[NFC_ATTR_TARGET_INDEX]); |
949 | |
950 | comm = nla_get_u8(nla: info->attrs[NFC_ATTR_COMM_MODE]); |
951 | |
952 | if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE) |
953 | return -EINVAL; |
954 | |
955 | dev = nfc_get_device(idx); |
956 | if (!dev) |
957 | return -ENODEV; |
958 | |
959 | rc = nfc_dep_link_up(dev, target_idx: tgt_idx, comm_mode: comm); |
960 | |
961 | nfc_put_device(dev); |
962 | |
963 | return rc; |
964 | } |
965 | |
966 | static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) |
967 | { |
968 | struct nfc_dev *dev; |
969 | int rc; |
970 | u32 idx; |
971 | |
972 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
973 | !info->attrs[NFC_ATTR_TARGET_INDEX]) |
974 | return -EINVAL; |
975 | |
976 | idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
977 | |
978 | dev = nfc_get_device(idx); |
979 | if (!dev) |
980 | return -ENODEV; |
981 | |
982 | rc = nfc_dep_link_down(dev); |
983 | |
984 | nfc_put_device(dev); |
985 | return rc; |
986 | } |
987 | |
988 | static int nfc_genl_send_params(struct sk_buff *msg, |
989 | struct nfc_llcp_local *local, |
990 | u32 portid, u32 seq) |
991 | { |
992 | void *hdr; |
993 | |
994 | hdr = genlmsg_put(skb: msg, portid, seq, family: &nfc_genl_family, flags: 0, |
995 | cmd: NFC_CMD_LLC_GET_PARAMS); |
996 | if (!hdr) |
997 | return -EMSGSIZE; |
998 | |
999 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: local->dev->idx) || |
1000 | nla_put_u8(skb: msg, attrtype: NFC_ATTR_LLC_PARAM_LTO, value: local->lto) || |
1001 | nla_put_u8(skb: msg, attrtype: NFC_ATTR_LLC_PARAM_RW, value: local->rw) || |
1002 | nla_put_u16(skb: msg, attrtype: NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux))) |
1003 | goto nla_put_failure; |
1004 | |
1005 | genlmsg_end(skb: msg, hdr); |
1006 | return 0; |
1007 | |
1008 | nla_put_failure: |
1009 | genlmsg_cancel(skb: msg, hdr); |
1010 | return -EMSGSIZE; |
1011 | } |
1012 | |
1013 | static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info) |
1014 | { |
1015 | struct nfc_dev *dev; |
1016 | struct nfc_llcp_local *local; |
1017 | int rc = 0; |
1018 | struct sk_buff *msg = NULL; |
1019 | u32 idx; |
1020 | |
1021 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
1022 | !info->attrs[NFC_ATTR_FIRMWARE_NAME]) |
1023 | return -EINVAL; |
1024 | |
1025 | idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
1026 | |
1027 | dev = nfc_get_device(idx); |
1028 | if (!dev) |
1029 | return -ENODEV; |
1030 | |
1031 | device_lock(dev: &dev->dev); |
1032 | |
1033 | local = nfc_llcp_find_local(dev); |
1034 | if (!local) { |
1035 | rc = -ENODEV; |
1036 | goto exit; |
1037 | } |
1038 | |
1039 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1040 | if (!msg) { |
1041 | rc = -ENOMEM; |
1042 | goto put_local; |
1043 | } |
1044 | |
1045 | rc = nfc_genl_send_params(msg, local, portid: info->snd_portid, seq: info->snd_seq); |
1046 | |
1047 | put_local: |
1048 | nfc_llcp_local_put(local); |
1049 | |
1050 | exit: |
1051 | device_unlock(dev: &dev->dev); |
1052 | |
1053 | nfc_put_device(dev); |
1054 | |
1055 | if (rc < 0) { |
1056 | if (msg) |
1057 | nlmsg_free(skb: msg); |
1058 | |
1059 | return rc; |
1060 | } |
1061 | |
1062 | return genlmsg_reply(skb: msg, info); |
1063 | } |
1064 | |
1065 | static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info) |
1066 | { |
1067 | struct nfc_dev *dev; |
1068 | struct nfc_llcp_local *local; |
1069 | u8 rw = 0; |
1070 | u16 miux = 0; |
1071 | u32 idx; |
1072 | int rc = 0; |
1073 | |
1074 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
1075 | (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] && |
1076 | !info->attrs[NFC_ATTR_LLC_PARAM_RW] && |
1077 | !info->attrs[NFC_ATTR_LLC_PARAM_MIUX])) |
1078 | return -EINVAL; |
1079 | |
1080 | if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) { |
1081 | rw = nla_get_u8(nla: info->attrs[NFC_ATTR_LLC_PARAM_RW]); |
1082 | |
1083 | if (rw > LLCP_MAX_RW) |
1084 | return -EINVAL; |
1085 | } |
1086 | |
1087 | if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) { |
1088 | miux = nla_get_u16(nla: info->attrs[NFC_ATTR_LLC_PARAM_MIUX]); |
1089 | |
1090 | if (miux > LLCP_MAX_MIUX) |
1091 | return -EINVAL; |
1092 | } |
1093 | |
1094 | idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
1095 | |
1096 | dev = nfc_get_device(idx); |
1097 | if (!dev) |
1098 | return -ENODEV; |
1099 | |
1100 | device_lock(dev: &dev->dev); |
1101 | |
1102 | local = nfc_llcp_find_local(dev); |
1103 | if (!local) { |
1104 | rc = -ENODEV; |
1105 | goto exit; |
1106 | } |
1107 | |
1108 | if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) { |
1109 | if (dev->dep_link_up) { |
1110 | rc = -EINPROGRESS; |
1111 | goto put_local; |
1112 | } |
1113 | |
1114 | local->lto = nla_get_u8(nla: info->attrs[NFC_ATTR_LLC_PARAM_LTO]); |
1115 | } |
1116 | |
1117 | if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) |
1118 | local->rw = rw; |
1119 | |
1120 | if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) |
1121 | local->miux = cpu_to_be16(miux); |
1122 | |
1123 | put_local: |
1124 | nfc_llcp_local_put(local); |
1125 | |
1126 | exit: |
1127 | device_unlock(dev: &dev->dev); |
1128 | |
1129 | nfc_put_device(dev); |
1130 | |
1131 | return rc; |
1132 | } |
1133 | |
1134 | static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info) |
1135 | { |
1136 | struct nfc_dev *dev; |
1137 | struct nfc_llcp_local *local; |
1138 | struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1]; |
1139 | u32 idx; |
1140 | u8 tid; |
1141 | char *uri; |
1142 | int rc = 0, rem; |
1143 | size_t uri_len, tlvs_len; |
1144 | struct hlist_head sdreq_list; |
1145 | struct nfc_llcp_sdp_tlv *sdreq; |
1146 | |
1147 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
1148 | !info->attrs[NFC_ATTR_LLC_SDP]) |
1149 | return -EINVAL; |
1150 | |
1151 | idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
1152 | |
1153 | dev = nfc_get_device(idx); |
1154 | if (!dev) |
1155 | return -ENODEV; |
1156 | |
1157 | device_lock(dev: &dev->dev); |
1158 | |
1159 | if (dev->dep_link_up == false) { |
1160 | rc = -ENOLINK; |
1161 | goto exit; |
1162 | } |
1163 | |
1164 | local = nfc_llcp_find_local(dev); |
1165 | if (!local) { |
1166 | rc = -ENODEV; |
1167 | goto exit; |
1168 | } |
1169 | |
1170 | INIT_HLIST_HEAD(&sdreq_list); |
1171 | |
1172 | tlvs_len = 0; |
1173 | |
1174 | nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) { |
1175 | rc = nla_parse_nested_deprecated(tb: sdp_attrs, NFC_SDP_ATTR_MAX, |
1176 | nla: attr, policy: nfc_sdp_genl_policy, |
1177 | extack: info->extack); |
1178 | |
1179 | if (rc != 0) { |
1180 | rc = -EINVAL; |
1181 | goto put_local; |
1182 | } |
1183 | |
1184 | if (!sdp_attrs[NFC_SDP_ATTR_URI]) |
1185 | continue; |
1186 | |
1187 | uri_len = nla_len(nla: sdp_attrs[NFC_SDP_ATTR_URI]); |
1188 | if (uri_len == 0) |
1189 | continue; |
1190 | |
1191 | uri = nla_data(nla: sdp_attrs[NFC_SDP_ATTR_URI]); |
1192 | if (uri == NULL || *uri == 0) |
1193 | continue; |
1194 | |
1195 | tid = local->sdreq_next_tid++; |
1196 | |
1197 | sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len); |
1198 | if (sdreq == NULL) { |
1199 | rc = -ENOMEM; |
1200 | goto put_local; |
1201 | } |
1202 | |
1203 | tlvs_len += sdreq->tlv_len; |
1204 | |
1205 | hlist_add_head(n: &sdreq->node, h: &sdreq_list); |
1206 | } |
1207 | |
1208 | if (hlist_empty(h: &sdreq_list)) { |
1209 | rc = -EINVAL; |
1210 | goto put_local; |
1211 | } |
1212 | |
1213 | rc = nfc_llcp_send_snl_sdreq(local, tlv_list: &sdreq_list, tlvs_len); |
1214 | |
1215 | put_local: |
1216 | nfc_llcp_local_put(local); |
1217 | |
1218 | exit: |
1219 | device_unlock(dev: &dev->dev); |
1220 | |
1221 | nfc_put_device(dev); |
1222 | |
1223 | return rc; |
1224 | } |
1225 | |
1226 | static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info) |
1227 | { |
1228 | struct nfc_dev *dev; |
1229 | int rc; |
1230 | u32 idx; |
1231 | char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1]; |
1232 | |
1233 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || !info->attrs[NFC_ATTR_FIRMWARE_NAME]) |
1234 | return -EINVAL; |
1235 | |
1236 | idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
1237 | |
1238 | dev = nfc_get_device(idx); |
1239 | if (!dev) |
1240 | return -ENODEV; |
1241 | |
1242 | nla_strscpy(dst: firmware_name, nla: info->attrs[NFC_ATTR_FIRMWARE_NAME], |
1243 | dstsize: sizeof(firmware_name)); |
1244 | |
1245 | rc = nfc_fw_download(dev, firmware_name); |
1246 | |
1247 | nfc_put_device(dev); |
1248 | return rc; |
1249 | } |
1250 | |
1251 | int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name, |
1252 | u32 result) |
1253 | { |
1254 | struct sk_buff *msg; |
1255 | void *hdr; |
1256 | |
1257 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1258 | if (!msg) |
1259 | return -ENOMEM; |
1260 | |
1261 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
1262 | cmd: NFC_CMD_FW_DOWNLOAD); |
1263 | if (!hdr) |
1264 | goto free_msg; |
1265 | |
1266 | if (nla_put_string(skb: msg, attrtype: NFC_ATTR_FIRMWARE_NAME, str: firmware_name) || |
1267 | nla_put_u32(skb: msg, attrtype: NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, value: result) || |
1268 | nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx)) |
1269 | goto nla_put_failure; |
1270 | |
1271 | genlmsg_end(skb: msg, hdr); |
1272 | |
1273 | genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_ATOMIC); |
1274 | |
1275 | return 0; |
1276 | |
1277 | nla_put_failure: |
1278 | free_msg: |
1279 | nlmsg_free(skb: msg); |
1280 | return -EMSGSIZE; |
1281 | } |
1282 | |
1283 | static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info) |
1284 | { |
1285 | struct nfc_dev *dev; |
1286 | int rc; |
1287 | u32 idx, se_idx; |
1288 | |
1289 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
1290 | !info->attrs[NFC_ATTR_SE_INDEX]) |
1291 | return -EINVAL; |
1292 | |
1293 | idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
1294 | se_idx = nla_get_u32(nla: info->attrs[NFC_ATTR_SE_INDEX]); |
1295 | |
1296 | dev = nfc_get_device(idx); |
1297 | if (!dev) |
1298 | return -ENODEV; |
1299 | |
1300 | rc = nfc_enable_se(dev, se_idx); |
1301 | |
1302 | nfc_put_device(dev); |
1303 | return rc; |
1304 | } |
1305 | |
1306 | static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info) |
1307 | { |
1308 | struct nfc_dev *dev; |
1309 | int rc; |
1310 | u32 idx, se_idx; |
1311 | |
1312 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
1313 | !info->attrs[NFC_ATTR_SE_INDEX]) |
1314 | return -EINVAL; |
1315 | |
1316 | idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
1317 | se_idx = nla_get_u32(nla: info->attrs[NFC_ATTR_SE_INDEX]); |
1318 | |
1319 | dev = nfc_get_device(idx); |
1320 | if (!dev) |
1321 | return -ENODEV; |
1322 | |
1323 | rc = nfc_disable_se(dev, se_idx); |
1324 | |
1325 | nfc_put_device(dev); |
1326 | return rc; |
1327 | } |
1328 | |
1329 | static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev, |
1330 | u32 portid, u32 seq, |
1331 | struct netlink_callback *cb, |
1332 | int flags) |
1333 | { |
1334 | void *hdr; |
1335 | struct nfc_se *se, *n; |
1336 | |
1337 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) { |
1338 | hdr = genlmsg_put(skb: msg, portid, seq, family: &nfc_genl_family, flags, |
1339 | cmd: NFC_CMD_GET_SE); |
1340 | if (!hdr) |
1341 | goto nla_put_failure; |
1342 | |
1343 | if (cb) |
1344 | genl_dump_check_consistent(cb, user_hdr: hdr); |
1345 | |
1346 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx) || |
1347 | nla_put_u32(skb: msg, attrtype: NFC_ATTR_SE_INDEX, value: se->idx) || |
1348 | nla_put_u8(skb: msg, attrtype: NFC_ATTR_SE_TYPE, value: se->type)) |
1349 | goto nla_put_failure; |
1350 | |
1351 | genlmsg_end(skb: msg, hdr); |
1352 | } |
1353 | |
1354 | return 0; |
1355 | |
1356 | nla_put_failure: |
1357 | genlmsg_cancel(skb: msg, hdr); |
1358 | return -EMSGSIZE; |
1359 | } |
1360 | |
1361 | static int nfc_genl_dump_ses(struct sk_buff *skb, |
1362 | struct netlink_callback *cb) |
1363 | { |
1364 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; |
1365 | struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; |
1366 | bool first_call = false; |
1367 | |
1368 | if (!iter) { |
1369 | first_call = true; |
1370 | iter = kmalloc(size: sizeof(struct class_dev_iter), GFP_KERNEL); |
1371 | if (!iter) |
1372 | return -ENOMEM; |
1373 | cb->args[0] = (long) iter; |
1374 | } |
1375 | |
1376 | mutex_lock(&nfc_devlist_mutex); |
1377 | |
1378 | cb->seq = nfc_devlist_generation; |
1379 | |
1380 | if (first_call) { |
1381 | nfc_device_iter_init(iter); |
1382 | dev = nfc_device_iter_next(iter); |
1383 | } |
1384 | |
1385 | while (dev) { |
1386 | int rc; |
1387 | |
1388 | rc = nfc_genl_send_se(msg: skb, dev, NETLINK_CB(cb->skb).portid, |
1389 | seq: cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); |
1390 | if (rc < 0) |
1391 | break; |
1392 | |
1393 | dev = nfc_device_iter_next(iter); |
1394 | } |
1395 | |
1396 | mutex_unlock(lock: &nfc_devlist_mutex); |
1397 | |
1398 | cb->args[1] = (long) dev; |
1399 | |
1400 | return skb->len; |
1401 | } |
1402 | |
1403 | static int nfc_genl_dump_ses_done(struct netlink_callback *cb) |
1404 | { |
1405 | struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; |
1406 | |
1407 | if (iter) { |
1408 | nfc_device_iter_exit(iter); |
1409 | kfree(objp: iter); |
1410 | } |
1411 | |
1412 | return 0; |
1413 | } |
1414 | |
1415 | static int nfc_se_io(struct nfc_dev *dev, u32 se_idx, |
1416 | u8 *apdu, size_t apdu_length, |
1417 | se_io_cb_t cb, void *cb_context) |
1418 | { |
1419 | struct nfc_se *se; |
1420 | int rc; |
1421 | |
1422 | pr_debug("%s se index %d\n" , dev_name(&dev->dev), se_idx); |
1423 | |
1424 | device_lock(dev: &dev->dev); |
1425 | |
1426 | if (!device_is_registered(dev: &dev->dev)) { |
1427 | rc = -ENODEV; |
1428 | goto error; |
1429 | } |
1430 | |
1431 | if (!dev->dev_up) { |
1432 | rc = -ENODEV; |
1433 | goto error; |
1434 | } |
1435 | |
1436 | if (!dev->ops->se_io) { |
1437 | rc = -EOPNOTSUPP; |
1438 | goto error; |
1439 | } |
1440 | |
1441 | se = nfc_find_se(dev, se_idx); |
1442 | if (!se) { |
1443 | rc = -EINVAL; |
1444 | goto error; |
1445 | } |
1446 | |
1447 | if (se->state != NFC_SE_ENABLED) { |
1448 | rc = -ENODEV; |
1449 | goto error; |
1450 | } |
1451 | |
1452 | rc = dev->ops->se_io(dev, se_idx, apdu, |
1453 | apdu_length, cb, cb_context); |
1454 | |
1455 | device_unlock(dev: &dev->dev); |
1456 | return rc; |
1457 | |
1458 | error: |
1459 | device_unlock(dev: &dev->dev); |
1460 | kfree(objp: cb_context); |
1461 | return rc; |
1462 | } |
1463 | |
1464 | struct se_io_ctx { |
1465 | u32 dev_idx; |
1466 | u32 se_idx; |
1467 | }; |
1468 | |
1469 | static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err) |
1470 | { |
1471 | struct se_io_ctx *ctx = context; |
1472 | struct sk_buff *msg; |
1473 | void *hdr; |
1474 | |
1475 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1476 | if (!msg) { |
1477 | kfree(objp: ctx); |
1478 | return; |
1479 | } |
1480 | |
1481 | hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &nfc_genl_family, flags: 0, |
1482 | cmd: NFC_CMD_SE_IO); |
1483 | if (!hdr) |
1484 | goto free_msg; |
1485 | |
1486 | if (nla_put_u32(skb: msg, attrtype: NFC_ATTR_DEVICE_INDEX, value: ctx->dev_idx) || |
1487 | nla_put_u32(skb: msg, attrtype: NFC_ATTR_SE_INDEX, value: ctx->se_idx) || |
1488 | nla_put(skb: msg, attrtype: NFC_ATTR_SE_APDU, attrlen: apdu_len, data: apdu)) |
1489 | goto nla_put_failure; |
1490 | |
1491 | genlmsg_end(skb: msg, hdr); |
1492 | |
1493 | genlmsg_multicast(family: &nfc_genl_family, skb: msg, portid: 0, group: 0, GFP_KERNEL); |
1494 | |
1495 | kfree(objp: ctx); |
1496 | |
1497 | return; |
1498 | |
1499 | nla_put_failure: |
1500 | free_msg: |
1501 | nlmsg_free(skb: msg); |
1502 | kfree(objp: ctx); |
1503 | |
1504 | return; |
1505 | } |
1506 | |
1507 | static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info) |
1508 | { |
1509 | struct nfc_dev *dev; |
1510 | struct se_io_ctx *ctx; |
1511 | u32 dev_idx, se_idx; |
1512 | u8 *apdu; |
1513 | size_t apdu_len; |
1514 | int rc; |
1515 | |
1516 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
1517 | !info->attrs[NFC_ATTR_SE_INDEX] || |
1518 | !info->attrs[NFC_ATTR_SE_APDU]) |
1519 | return -EINVAL; |
1520 | |
1521 | dev_idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
1522 | se_idx = nla_get_u32(nla: info->attrs[NFC_ATTR_SE_INDEX]); |
1523 | |
1524 | dev = nfc_get_device(idx: dev_idx); |
1525 | if (!dev) |
1526 | return -ENODEV; |
1527 | |
1528 | if (!dev->ops || !dev->ops->se_io) { |
1529 | rc = -EOPNOTSUPP; |
1530 | goto put_dev; |
1531 | } |
1532 | |
1533 | apdu_len = nla_len(nla: info->attrs[NFC_ATTR_SE_APDU]); |
1534 | if (apdu_len == 0) { |
1535 | rc = -EINVAL; |
1536 | goto put_dev; |
1537 | } |
1538 | |
1539 | apdu = nla_data(nla: info->attrs[NFC_ATTR_SE_APDU]); |
1540 | if (!apdu) { |
1541 | rc = -EINVAL; |
1542 | goto put_dev; |
1543 | } |
1544 | |
1545 | ctx = kzalloc(size: sizeof(struct se_io_ctx), GFP_KERNEL); |
1546 | if (!ctx) { |
1547 | rc = -ENOMEM; |
1548 | goto put_dev; |
1549 | } |
1550 | |
1551 | ctx->dev_idx = dev_idx; |
1552 | ctx->se_idx = se_idx; |
1553 | |
1554 | rc = nfc_se_io(dev, se_idx, apdu, apdu_length: apdu_len, cb: se_io_cb, cb_context: ctx); |
1555 | |
1556 | put_dev: |
1557 | nfc_put_device(dev); |
1558 | return rc; |
1559 | } |
1560 | |
1561 | static int nfc_genl_vendor_cmd(struct sk_buff *skb, |
1562 | struct genl_info *info) |
1563 | { |
1564 | struct nfc_dev *dev; |
1565 | const struct nfc_vendor_cmd *cmd; |
1566 | u32 dev_idx, vid, subcmd; |
1567 | u8 *data; |
1568 | size_t data_len; |
1569 | int i, err; |
1570 | |
1571 | if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
1572 | !info->attrs[NFC_ATTR_VENDOR_ID] || |
1573 | !info->attrs[NFC_ATTR_VENDOR_SUBCMD]) |
1574 | return -EINVAL; |
1575 | |
1576 | dev_idx = nla_get_u32(nla: info->attrs[NFC_ATTR_DEVICE_INDEX]); |
1577 | vid = nla_get_u32(nla: info->attrs[NFC_ATTR_VENDOR_ID]); |
1578 | subcmd = nla_get_u32(nla: info->attrs[NFC_ATTR_VENDOR_SUBCMD]); |
1579 | |
1580 | dev = nfc_get_device(idx: dev_idx); |
1581 | if (!dev) |
1582 | return -ENODEV; |
1583 | |
1584 | if (!dev->vendor_cmds || !dev->n_vendor_cmds) { |
1585 | err = -ENODEV; |
1586 | goto put_dev; |
1587 | } |
1588 | |
1589 | if (info->attrs[NFC_ATTR_VENDOR_DATA]) { |
1590 | data = nla_data(nla: info->attrs[NFC_ATTR_VENDOR_DATA]); |
1591 | data_len = nla_len(nla: info->attrs[NFC_ATTR_VENDOR_DATA]); |
1592 | if (data_len == 0) { |
1593 | err = -EINVAL; |
1594 | goto put_dev; |
1595 | } |
1596 | } else { |
1597 | data = NULL; |
1598 | data_len = 0; |
1599 | } |
1600 | |
1601 | for (i = 0; i < dev->n_vendor_cmds; i++) { |
1602 | cmd = &dev->vendor_cmds[i]; |
1603 | |
1604 | if (cmd->vendor_id != vid || cmd->subcmd != subcmd) |
1605 | continue; |
1606 | |
1607 | dev->cur_cmd_info = info; |
1608 | err = cmd->doit(dev, data, data_len); |
1609 | dev->cur_cmd_info = NULL; |
1610 | goto put_dev; |
1611 | } |
1612 | |
1613 | err = -EOPNOTSUPP; |
1614 | |
1615 | put_dev: |
1616 | nfc_put_device(dev); |
1617 | return err; |
1618 | } |
1619 | |
1620 | /* message building helper */ |
1621 | static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq, |
1622 | int flags, u8 cmd) |
1623 | { |
1624 | /* since there is no private header just add the generic one */ |
1625 | return genlmsg_put(skb, portid, seq, family: &nfc_genl_family, flags, cmd); |
1626 | } |
1627 | |
1628 | static struct sk_buff * |
1629 | __nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen, |
1630 | u32 portid, u32 seq, |
1631 | enum nfc_attrs attr, |
1632 | u32 oui, u32 subcmd, gfp_t gfp) |
1633 | { |
1634 | struct sk_buff *skb; |
1635 | void *hdr; |
1636 | |
1637 | skb = nlmsg_new(payload: approxlen + 100, flags: gfp); |
1638 | if (!skb) |
1639 | return NULL; |
1640 | |
1641 | hdr = nfc_hdr_put(skb, portid, seq, flags: 0, cmd: NFC_CMD_VENDOR); |
1642 | if (!hdr) { |
1643 | kfree_skb(skb); |
1644 | return NULL; |
1645 | } |
1646 | |
1647 | if (nla_put_u32(skb, attrtype: NFC_ATTR_DEVICE_INDEX, value: dev->idx)) |
1648 | goto nla_put_failure; |
1649 | if (nla_put_u32(skb, attrtype: NFC_ATTR_VENDOR_ID, value: oui)) |
1650 | goto nla_put_failure; |
1651 | if (nla_put_u32(skb, attrtype: NFC_ATTR_VENDOR_SUBCMD, value: subcmd)) |
1652 | goto nla_put_failure; |
1653 | |
1654 | ((void **)skb->cb)[0] = dev; |
1655 | ((void **)skb->cb)[1] = hdr; |
1656 | |
1657 | return skb; |
1658 | |
1659 | nla_put_failure: |
1660 | kfree_skb(skb); |
1661 | return NULL; |
1662 | } |
1663 | |
1664 | struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev, |
1665 | enum nfc_attrs attr, |
1666 | u32 oui, u32 subcmd, |
1667 | int approxlen) |
1668 | { |
1669 | if (WARN_ON(!dev->cur_cmd_info)) |
1670 | return NULL; |
1671 | |
1672 | return __nfc_alloc_vendor_cmd_skb(dev, approxlen, |
1673 | portid: dev->cur_cmd_info->snd_portid, |
1674 | seq: dev->cur_cmd_info->snd_seq, attr, |
1675 | oui, subcmd, GFP_KERNEL); |
1676 | } |
1677 | EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb); |
1678 | |
1679 | int nfc_vendor_cmd_reply(struct sk_buff *skb) |
1680 | { |
1681 | struct nfc_dev *dev = ((void **)skb->cb)[0]; |
1682 | void *hdr = ((void **)skb->cb)[1]; |
1683 | |
1684 | /* clear CB data for netlink core to own from now on */ |
1685 | memset(skb->cb, 0, sizeof(skb->cb)); |
1686 | |
1687 | if (WARN_ON(!dev->cur_cmd_info)) { |
1688 | kfree_skb(skb); |
1689 | return -EINVAL; |
1690 | } |
1691 | |
1692 | genlmsg_end(skb, hdr); |
1693 | return genlmsg_reply(skb, info: dev->cur_cmd_info); |
1694 | } |
1695 | EXPORT_SYMBOL(nfc_vendor_cmd_reply); |
1696 | |
1697 | static const struct genl_ops nfc_genl_ops[] = { |
1698 | { |
1699 | .cmd = NFC_CMD_GET_DEVICE, |
1700 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1701 | .doit = nfc_genl_get_device, |
1702 | .dumpit = nfc_genl_dump_devices, |
1703 | .done = nfc_genl_dump_devices_done, |
1704 | }, |
1705 | { |
1706 | .cmd = NFC_CMD_DEV_UP, |
1707 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1708 | .doit = nfc_genl_dev_up, |
1709 | .flags = GENL_ADMIN_PERM, |
1710 | }, |
1711 | { |
1712 | .cmd = NFC_CMD_DEV_DOWN, |
1713 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1714 | .doit = nfc_genl_dev_down, |
1715 | .flags = GENL_ADMIN_PERM, |
1716 | }, |
1717 | { |
1718 | .cmd = NFC_CMD_START_POLL, |
1719 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1720 | .doit = nfc_genl_start_poll, |
1721 | .flags = GENL_ADMIN_PERM, |
1722 | }, |
1723 | { |
1724 | .cmd = NFC_CMD_STOP_POLL, |
1725 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1726 | .doit = nfc_genl_stop_poll, |
1727 | .flags = GENL_ADMIN_PERM, |
1728 | }, |
1729 | { |
1730 | .cmd = NFC_CMD_DEP_LINK_UP, |
1731 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1732 | .doit = nfc_genl_dep_link_up, |
1733 | .flags = GENL_ADMIN_PERM, |
1734 | }, |
1735 | { |
1736 | .cmd = NFC_CMD_DEP_LINK_DOWN, |
1737 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1738 | .doit = nfc_genl_dep_link_down, |
1739 | .flags = GENL_ADMIN_PERM, |
1740 | }, |
1741 | { |
1742 | .cmd = NFC_CMD_GET_TARGET, |
1743 | .validate = GENL_DONT_VALIDATE_STRICT | |
1744 | GENL_DONT_VALIDATE_DUMP_STRICT, |
1745 | .dumpit = nfc_genl_dump_targets, |
1746 | .done = nfc_genl_dump_targets_done, |
1747 | }, |
1748 | { |
1749 | .cmd = NFC_CMD_LLC_GET_PARAMS, |
1750 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1751 | .doit = nfc_genl_llc_get_params, |
1752 | }, |
1753 | { |
1754 | .cmd = NFC_CMD_LLC_SET_PARAMS, |
1755 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1756 | .doit = nfc_genl_llc_set_params, |
1757 | .flags = GENL_ADMIN_PERM, |
1758 | }, |
1759 | { |
1760 | .cmd = NFC_CMD_LLC_SDREQ, |
1761 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1762 | .doit = nfc_genl_llc_sdreq, |
1763 | .flags = GENL_ADMIN_PERM, |
1764 | }, |
1765 | { |
1766 | .cmd = NFC_CMD_FW_DOWNLOAD, |
1767 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1768 | .doit = nfc_genl_fw_download, |
1769 | .flags = GENL_ADMIN_PERM, |
1770 | }, |
1771 | { |
1772 | .cmd = NFC_CMD_ENABLE_SE, |
1773 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1774 | .doit = nfc_genl_enable_se, |
1775 | .flags = GENL_ADMIN_PERM, |
1776 | }, |
1777 | { |
1778 | .cmd = NFC_CMD_DISABLE_SE, |
1779 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1780 | .doit = nfc_genl_disable_se, |
1781 | .flags = GENL_ADMIN_PERM, |
1782 | }, |
1783 | { |
1784 | .cmd = NFC_CMD_GET_SE, |
1785 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1786 | .dumpit = nfc_genl_dump_ses, |
1787 | .done = nfc_genl_dump_ses_done, |
1788 | }, |
1789 | { |
1790 | .cmd = NFC_CMD_SE_IO, |
1791 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1792 | .doit = nfc_genl_se_io, |
1793 | .flags = GENL_ADMIN_PERM, |
1794 | }, |
1795 | { |
1796 | .cmd = NFC_CMD_ACTIVATE_TARGET, |
1797 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1798 | .doit = nfc_genl_activate_target, |
1799 | .flags = GENL_ADMIN_PERM, |
1800 | }, |
1801 | { |
1802 | .cmd = NFC_CMD_VENDOR, |
1803 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1804 | .doit = nfc_genl_vendor_cmd, |
1805 | .flags = GENL_ADMIN_PERM, |
1806 | }, |
1807 | { |
1808 | .cmd = NFC_CMD_DEACTIVATE_TARGET, |
1809 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
1810 | .doit = nfc_genl_deactivate_target, |
1811 | .flags = GENL_ADMIN_PERM, |
1812 | }, |
1813 | }; |
1814 | |
1815 | static struct genl_family nfc_genl_family __ro_after_init = { |
1816 | .hdrsize = 0, |
1817 | .name = NFC_GENL_NAME, |
1818 | .version = NFC_GENL_VERSION, |
1819 | .maxattr = NFC_ATTR_MAX, |
1820 | .policy = nfc_genl_policy, |
1821 | .module = THIS_MODULE, |
1822 | .ops = nfc_genl_ops, |
1823 | .n_ops = ARRAY_SIZE(nfc_genl_ops), |
1824 | .resv_start_op = NFC_CMD_DEACTIVATE_TARGET + 1, |
1825 | .mcgrps = nfc_genl_mcgrps, |
1826 | .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps), |
1827 | }; |
1828 | |
1829 | |
1830 | struct urelease_work { |
1831 | struct work_struct w; |
1832 | u32 portid; |
1833 | }; |
1834 | |
1835 | static void nfc_urelease_event_work(struct work_struct *work) |
1836 | { |
1837 | struct urelease_work *w = container_of(work, struct urelease_work, w); |
1838 | struct class_dev_iter iter; |
1839 | struct nfc_dev *dev; |
1840 | |
1841 | pr_debug("portid %d\n" , w->portid); |
1842 | |
1843 | mutex_lock(&nfc_devlist_mutex); |
1844 | |
1845 | nfc_device_iter_init(iter: &iter); |
1846 | dev = nfc_device_iter_next(iter: &iter); |
1847 | |
1848 | while (dev) { |
1849 | mutex_lock(&dev->genl_data.genl_data_mutex); |
1850 | |
1851 | if (dev->genl_data.poll_req_portid == w->portid) { |
1852 | nfc_stop_poll(dev); |
1853 | dev->genl_data.poll_req_portid = 0; |
1854 | } |
1855 | |
1856 | mutex_unlock(lock: &dev->genl_data.genl_data_mutex); |
1857 | |
1858 | dev = nfc_device_iter_next(iter: &iter); |
1859 | } |
1860 | |
1861 | nfc_device_iter_exit(iter: &iter); |
1862 | |
1863 | mutex_unlock(lock: &nfc_devlist_mutex); |
1864 | |
1865 | kfree(objp: w); |
1866 | } |
1867 | |
1868 | static int nfc_genl_rcv_nl_event(struct notifier_block *this, |
1869 | unsigned long event, void *ptr) |
1870 | { |
1871 | struct netlink_notify *n = ptr; |
1872 | struct urelease_work *w; |
1873 | |
1874 | if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC) |
1875 | goto out; |
1876 | |
1877 | pr_debug("NETLINK_URELEASE event from id %d\n" , n->portid); |
1878 | |
1879 | w = kmalloc(size: sizeof(*w), GFP_ATOMIC); |
1880 | if (w) { |
1881 | INIT_WORK(&w->w, nfc_urelease_event_work); |
1882 | w->portid = n->portid; |
1883 | schedule_work(work: &w->w); |
1884 | } |
1885 | |
1886 | out: |
1887 | return NOTIFY_DONE; |
1888 | } |
1889 | |
1890 | void nfc_genl_data_init(struct nfc_genl_data *genl_data) |
1891 | { |
1892 | genl_data->poll_req_portid = 0; |
1893 | mutex_init(&genl_data->genl_data_mutex); |
1894 | } |
1895 | |
1896 | void nfc_genl_data_exit(struct nfc_genl_data *genl_data) |
1897 | { |
1898 | mutex_destroy(lock: &genl_data->genl_data_mutex); |
1899 | } |
1900 | |
1901 | static struct notifier_block nl_notifier = { |
1902 | .notifier_call = nfc_genl_rcv_nl_event, |
1903 | }; |
1904 | |
1905 | /** |
1906 | * nfc_genl_init() - Initialize netlink interface |
1907 | * |
1908 | * This initialization function registers the nfc netlink family. |
1909 | */ |
1910 | int __init nfc_genl_init(void) |
1911 | { |
1912 | int rc; |
1913 | |
1914 | rc = genl_register_family(family: &nfc_genl_family); |
1915 | if (rc) |
1916 | return rc; |
1917 | |
1918 | netlink_register_notifier(nb: &nl_notifier); |
1919 | |
1920 | return 0; |
1921 | } |
1922 | |
1923 | /** |
1924 | * nfc_genl_exit() - Deinitialize netlink interface |
1925 | * |
1926 | * This exit function unregisters the nfc netlink family. |
1927 | */ |
1928 | void nfc_genl_exit(void) |
1929 | { |
1930 | netlink_unregister_notifier(nb: &nl_notifier); |
1931 | genl_unregister_family(family: &nfc_genl_family); |
1932 | } |
1933 | |