projects / deliverable / linux.git / blob
? search:


3092df313fb112ce8dc2c98098543702d0a5e66f
[deliverable/linux.git] / net / nfc / netlink.c
1 /*
2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
3 *
4 * Authors:
5 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
6 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the
20 * Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
24 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
25
26 #include <net/genetlink.h>
27 #include <linux/nfc.h>
28 #include <linux/slab.h>
29
30 #include "nfc.h"
31 #include "llcp.h"
32
33 static struct genl_multicast_group nfc_genl_event_mcgrp = {
34 .name = NFC_GENL_MCAST_EVENT_NAME,
35 };
36
37 static struct genl_family nfc_genl_family = {
38 .id = GENL_ID_GENERATE,
39 .hdrsize = 0,
40 .name = NFC_GENL_NAME,
41 .version = NFC_GENL_VERSION,
42 .maxattr = NFC_ATTR_MAX,
43 };
44
45 static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
46 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
47 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
48 .len = NFC_DEVICE_NAME_MAXSIZE },
49 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
50 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
51 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
52 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
53 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
54 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
55 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
56 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
57 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
58 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
59 [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
60 .len = NFC_FIRMWARE_NAME_MAXSIZE },
61 [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
62 };
63
64 static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
65 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING },
66 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
67 };
68
69 static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
70 struct netlink_callback *cb, int flags)
71 {
72 void *hdr;
73
74 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
75 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
76 if (!hdr)
77 return -EMSGSIZE;
78
79 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
80
81 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
82 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
83 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
84 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
85 goto nla_put_failure;
86 if (target->nfcid1_len > 0 &&
87 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
88 target->nfcid1))
89 goto nla_put_failure;
90 if (target->sensb_res_len > 0 &&
91 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
92 target->sensb_res))
93 goto nla_put_failure;
94 if (target->sensf_res_len > 0 &&
95 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
96 target->sensf_res))
97 goto nla_put_failure;
98
99 return genlmsg_end(msg, hdr);
100
101 nla_put_failure:
102 genlmsg_cancel(msg, hdr);
103 return -EMSGSIZE;
104 }
105
106 static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
107 {
108 struct nfc_dev *dev;
109 int rc;
110 u32 idx;
111
112 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
113 nfc_genl_family.attrbuf,
114 nfc_genl_family.maxattr,
115 nfc_genl_policy);
116 if (rc < 0)
117 return ERR_PTR(rc);
118
119 if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX])
120 return ERR_PTR(-EINVAL);
121
122 idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]);
123
124 dev = nfc_get_device(idx);
125 if (!dev)
126 return ERR_PTR(-ENODEV);
127
128 return dev;
129 }
130
131 static int nfc_genl_dump_targets(struct sk_buff *skb,
132 struct netlink_callback *cb)
133 {
134 int i = cb->args[0];
135 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
136 int rc;
137
138 if (!dev) {
139 dev = __get_device_from_cb(cb);
140 if (IS_ERR(dev))
141 return PTR_ERR(dev);
142
143 cb->args[1] = (long) dev;
144 }
145
146 device_lock(&dev->dev);
147
148 cb->seq = dev->targets_generation;
149
150 while (i < dev->n_targets) {
151 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
152 NLM_F_MULTI);
153 if (rc < 0)
154 break;
155
156 i++;
157 }
158
159 device_unlock(&dev->dev);
160
161 cb->args[0] = i;
162
163 return skb->len;
164 }
165
166 static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
167 {
168 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
169
170 if (dev)
171 nfc_put_device(dev);
172
173 return 0;
174 }
175
176 int nfc_genl_targets_found(struct nfc_dev *dev)
177 {
178 struct sk_buff *msg;
179 void *hdr;
180
181 dev->genl_data.poll_req_portid = 0;
182
183 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
184 if (!msg)
185 return -ENOMEM;
186
187 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
188 NFC_EVENT_TARGETS_FOUND);
189 if (!hdr)
190 goto free_msg;
191
192 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
193 goto nla_put_failure;
194
195 genlmsg_end(msg, hdr);
196
197 return genlmsg_multicast(&nfc_genl_family, msg, 0,
198 nfc_genl_event_mcgrp.id, GFP_ATOMIC);
199
200 nla_put_failure:
201 genlmsg_cancel(msg, hdr);
202 free_msg:
203 nlmsg_free(msg);
204 return -EMSGSIZE;
205 }
206
207 int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
208 {
209 struct sk_buff *msg;
210 void *hdr;
211
212 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
213 if (!msg)
214 return -ENOMEM;
215
216 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
217 NFC_EVENT_TARGET_LOST);
218 if (!hdr)
219 goto free_msg;
220
221 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
222 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
223 goto nla_put_failure;
224
225 genlmsg_end(msg, hdr);
226
227 genlmsg_multicast(&nfc_genl_family, msg, 0,
228 nfc_genl_event_mcgrp.id, GFP_KERNEL);
229
230 return 0;
231
232 nla_put_failure:
233 genlmsg_cancel(msg, hdr);
234 free_msg:
235 nlmsg_free(msg);
236 return -EMSGSIZE;
237 }
238
239 int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
240 {
241 struct sk_buff *msg;
242 void *hdr;
243
244 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
245 if (!msg)
246 return -ENOMEM;
247
248 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
249 NFC_EVENT_TM_ACTIVATED);
250 if (!hdr)
251 goto free_msg;
252
253 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
254 goto nla_put_failure;
255 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
256 goto nla_put_failure;
257
258 genlmsg_end(msg, hdr);
259
260 genlmsg_multicast(&nfc_genl_family, msg, 0,
261 nfc_genl_event_mcgrp.id, GFP_KERNEL);
262
263 return 0;
264
265 nla_put_failure:
266 genlmsg_cancel(msg, hdr);
267 free_msg:
268 nlmsg_free(msg);
269 return -EMSGSIZE;
270 }
271
272 int nfc_genl_tm_deactivated(struct nfc_dev *dev)
273 {
274 struct sk_buff *msg;
275 void *hdr;
276
277 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
278 if (!msg)
279 return -ENOMEM;
280
281 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
282 NFC_EVENT_TM_DEACTIVATED);
283 if (!hdr)
284 goto free_msg;
285
286 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
287 goto nla_put_failure;
288
289 genlmsg_end(msg, hdr);
290
291 genlmsg_multicast(&nfc_genl_family, msg, 0,
292 nfc_genl_event_mcgrp.id, GFP_KERNEL);
293
294 return 0;
295
296 nla_put_failure:
297 genlmsg_cancel(msg, hdr);
298 free_msg:
299 nlmsg_free(msg);
300 return -EMSGSIZE;
301 }
302
303 int nfc_genl_device_added(struct nfc_dev *dev)
304 {
305 struct sk_buff *msg;
306 void *hdr;
307
308 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
309 if (!msg)
310 return -ENOMEM;
311
312 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
313 NFC_EVENT_DEVICE_ADDED);
314 if (!hdr)
315 goto free_msg;
316
317 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
318 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
319 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
320 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
321 goto nla_put_failure;
322
323 genlmsg_end(msg, hdr);
324
325 genlmsg_multicast(&nfc_genl_family, msg, 0,
326 nfc_genl_event_mcgrp.id, GFP_KERNEL);
327
328 return 0;
329
330 nla_put_failure:
331 genlmsg_cancel(msg, hdr);
332 free_msg:
333 nlmsg_free(msg);
334 return -EMSGSIZE;
335 }
336
337 int nfc_genl_device_removed(struct nfc_dev *dev)
338 {
339 struct sk_buff *msg;
340 void *hdr;
341
342 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
343 if (!msg)
344 return -ENOMEM;
345
346 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
347 NFC_EVENT_DEVICE_REMOVED);
348 if (!hdr)
349 goto free_msg;
350
351 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
352 goto nla_put_failure;
353
354 genlmsg_end(msg, hdr);
355
356 genlmsg_multicast(&nfc_genl_family, msg, 0,
357 nfc_genl_event_mcgrp.id, GFP_KERNEL);
358
359 return 0;
360
361 nla_put_failure:
362 genlmsg_cancel(msg, hdr);
363 free_msg:
364 nlmsg_free(msg);
365 return -EMSGSIZE;
366 }
367
368 int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
369 {
370 struct sk_buff *msg;
371 struct nlattr *sdp_attr, *uri_attr;
372 struct nfc_llcp_sdp_tlv *sdres;
373 struct hlist_node *n;
374 void *hdr;
375 int rc = -EMSGSIZE;
376 int i;
377
378 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
379 if (!msg)
380 return -ENOMEM;
381
382 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
383 NFC_EVENT_LLC_SDRES);
384 if (!hdr)
385 goto free_msg;
386
387 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
388 goto nla_put_failure;
389
390 sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
391 if (sdp_attr == NULL) {
392 rc = -ENOMEM;
393 goto nla_put_failure;
394 }
395
396 i = 1;
397 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
398 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
399
400 uri_attr = nla_nest_start(msg, i++);
401 if (uri_attr == NULL) {
402 rc = -ENOMEM;
403 goto nla_put_failure;
404 }
405
406 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
407 goto nla_put_failure;
408
409 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
410 goto nla_put_failure;
411
412 nla_nest_end(msg, uri_attr);
413
414 hlist_del(&sdres->node);
415
416 nfc_llcp_free_sdp_tlv(sdres);
417 }
418
419 nla_nest_end(msg, sdp_attr);
420
421 genlmsg_end(msg, hdr);
422
423 return genlmsg_multicast(&nfc_genl_family, msg, 0,
424 nfc_genl_event_mcgrp.id, GFP_ATOMIC);
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
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
458 genlmsg_multicast(&nfc_genl_family, msg, 0,
459 nfc_genl_event_mcgrp.id, GFP_KERNEL);
460
461 return 0;
462
463 nla_put_failure:
464 genlmsg_cancel(msg, hdr);
465 free_msg:
466 nlmsg_free(msg);
467 return -EMSGSIZE;
468 }
469
470 int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
471 {
472 struct sk_buff *msg;
473 void *hdr;
474
475 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
476 if (!msg)
477 return -ENOMEM;
478
479 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
480 NFC_EVENT_SE_REMOVED);
481 if (!hdr)
482 goto free_msg;
483
484 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
485 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
486 goto nla_put_failure;
487
488 genlmsg_end(msg, hdr);
489
490 genlmsg_multicast(&nfc_genl_family, msg, 0,
491 nfc_genl_event_mcgrp.id, GFP_KERNEL);
492
493 return 0;
494
495 nla_put_failure:
496 genlmsg_cancel(msg, hdr);
497 free_msg:
498 nlmsg_free(msg);
499 return -EMSGSIZE;
500 }
501
502 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
503 u32 portid, u32 seq,
504 struct netlink_callback *cb,
505 int flags)
506 {
507 void *hdr;
508
509 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
510 NFC_CMD_GET_DEVICE);
511 if (!hdr)
512 return -EMSGSIZE;
513
514 if (cb)
515 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
516
517 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
518 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
519 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
520 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
521 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
522 goto nla_put_failure;
523
524 return genlmsg_end(msg, hdr);
525
526 nla_put_failure:
527 genlmsg_cancel(msg, hdr);
528 return -EMSGSIZE;
529 }
530
531 static int nfc_genl_dump_devices(struct sk_buff *skb,
532 struct netlink_callback *cb)
533 {
534 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
535 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
536 bool first_call = false;
537
538 if (!iter) {
539 first_call = true;
540 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
541 if (!iter)
542 return -ENOMEM;
543 cb->args[0] = (long) iter;
544 }
545
546 mutex_lock(&nfc_devlist_mutex);
547
548 cb->seq = nfc_devlist_generation;
549
550 if (first_call) {
551 nfc_device_iter_init(iter);
552 dev = nfc_device_iter_next(iter);
553 }
554
555 while (dev) {
556 int rc;
557
558 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
559 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
560 if (rc < 0)
561 break;
562
563 dev = nfc_device_iter_next(iter);
564 }
565
566 mutex_unlock(&nfc_devlist_mutex);
567
568 cb->args[1] = (long) dev;
569
570 return skb->len;
571 }
572
573 static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
574 {
575 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
576
577 nfc_device_iter_exit(iter);
578 kfree(iter);
579
580 return 0;
581 }
582
583 int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
584 u8 comm_mode, u8 rf_mode)
585 {
586 struct sk_buff *msg;
587 void *hdr;
588
589 pr_debug("DEP link is up\n");
590
591 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
592 if (!msg)
593 return -ENOMEM;
594
595 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
596 if (!hdr)
597 goto free_msg;
598
599 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
600 goto nla_put_failure;
601 if (rf_mode == NFC_RF_INITIATOR &&
602 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
603 goto nla_put_failure;
604 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
605 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
606 goto nla_put_failure;
607
608 genlmsg_end(msg, hdr);
609
610 dev->dep_link_up = true;
611
612 genlmsg_multicast(&nfc_genl_family, msg, 0,
613 nfc_genl_event_mcgrp.id, GFP_ATOMIC);
614
615 return 0;
616
617 nla_put_failure:
618 genlmsg_cancel(msg, hdr);
619 free_msg:
620 nlmsg_free(msg);
621 return -EMSGSIZE;
622 }
623
624 int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
625 {
626 struct sk_buff *msg;
627 void *hdr;
628
629 pr_debug("DEP link is down\n");
630
631 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
632 if (!msg)
633 return -ENOMEM;
634
635 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
636 NFC_CMD_DEP_LINK_DOWN);
637 if (!hdr)
638 goto free_msg;
639
640 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
641 goto nla_put_failure;
642
643 genlmsg_end(msg, hdr);
644
645 genlmsg_multicast(&nfc_genl_family, msg, 0,
646 nfc_genl_event_mcgrp.id, GFP_ATOMIC);
647
648 return 0;
649
650 nla_put_failure:
651 genlmsg_cancel(msg, hdr);
652 free_msg:
653 nlmsg_free(msg);
654 return -EMSGSIZE;
655 }
656
657 static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
658 {
659 struct sk_buff *msg;
660 struct nfc_dev *dev;
661 u32 idx;
662 int rc = -ENOBUFS;
663
664 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
665 return -EINVAL;
666
667 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
668
669 dev = nfc_get_device(idx);
670 if (!dev)
671 return -ENODEV;
672
673 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
674 if (!msg) {
675 rc = -ENOMEM;
676 goto out_putdev;
677 }
678
679 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
680 NULL, 0);
681 if (rc < 0)
682 goto out_free;
683
684 nfc_put_device(dev);
685
686 return genlmsg_reply(msg, info);
687
688 out_free:
689 nlmsg_free(msg);
690 out_putdev:
691 nfc_put_device(dev);
692 return rc;
693 }
694
695 static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
696 {
697 struct nfc_dev *dev;
698 int rc;
699 u32 idx;
700
701 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
702 return -EINVAL;
703
704 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
705
706 dev = nfc_get_device(idx);
707 if (!dev)
708 return -ENODEV;
709
710 rc = nfc_dev_up(dev);
711
712 nfc_put_device(dev);
713 return rc;
714 }
715
716 static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
717 {
718 struct nfc_dev *dev;
719 int rc;
720 u32 idx;
721
722 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
723 return -EINVAL;
724
725 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
726
727 dev = nfc_get_device(idx);
728 if (!dev)
729 return -ENODEV;
730
731 rc = nfc_dev_down(dev);
732
733 nfc_put_device(dev);
734 return rc;
735 }
736
737 static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
738 {
739 struct nfc_dev *dev;
740 int rc;
741 u32 idx;
742 u32 im_protocols = 0, tm_protocols = 0;
743
744 pr_debug("Poll start\n");
745
746 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
747 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
748 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
749 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
750 return -EINVAL;
751
752 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
753
754 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
755 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
756
757 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
758 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
759 else if (info->attrs[NFC_ATTR_PROTOCOLS])
760 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
761
762 dev = nfc_get_device(idx);
763 if (!dev)
764 return -ENODEV;
765
766 mutex_lock(&dev->genl_data.genl_data_mutex);
767
768 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
769 if (!rc)
770 dev->genl_data.poll_req_portid = info->snd_portid;
771
772 mutex_unlock(&dev->genl_data.genl_data_mutex);
773
774 nfc_put_device(dev);
775 return rc;
776 }
777
778 static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
779 {
780 struct nfc_dev *dev;
781 int rc;
782 u32 idx;
783
784 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
785 return -EINVAL;
786
787 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
788
789 dev = nfc_get_device(idx);
790 if (!dev)
791 return -ENODEV;
792
793 device_lock(&dev->dev);
794
795 if (!dev->polling) {
796 device_unlock(&dev->dev);
797 return -EINVAL;
798 }
799
800 device_unlock(&dev->dev);
801
802 mutex_lock(&dev->genl_data.genl_data_mutex);
803
804 if (dev->genl_data.poll_req_portid != info->snd_portid) {
805 rc = -EBUSY;
806 goto out;
807 }
808
809 rc = nfc_stop_poll(dev);
810 dev->genl_data.poll_req_portid = 0;
811
812 out:
813 mutex_unlock(&dev->genl_data.genl_data_mutex);
814 nfc_put_device(dev);
815 return rc;
816 }
817
818 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
819 {
820 struct nfc_dev *dev;
821 int rc, tgt_idx;
822 u32 idx;
823 u8 comm;
824
825 pr_debug("DEP link up\n");
826
827 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
828 !info->attrs[NFC_ATTR_COMM_MODE])
829 return -EINVAL;
830
831 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
832 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
833 tgt_idx = NFC_TARGET_IDX_ANY;
834 else
835 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
836
837 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
838
839 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
840 return -EINVAL;
841
842 dev = nfc_get_device(idx);
843 if (!dev)
844 return -ENODEV;
845
846 rc = nfc_dep_link_up(dev, tgt_idx, comm);
847
848 nfc_put_device(dev);
849
850 return rc;
851 }
852
853 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
854 {
855 struct nfc_dev *dev;
856 int rc;
857 u32 idx;
858
859 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
860 return -EINVAL;
861
862 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
863
864 dev = nfc_get_device(idx);
865 if (!dev)
866 return -ENODEV;
867
868 rc = nfc_dep_link_down(dev);
869
870 nfc_put_device(dev);
871 return rc;
872 }
873
874 static int nfc_genl_send_params(struct sk_buff *msg,
875 struct nfc_llcp_local *local,
876 u32 portid, u32 seq)
877 {
878 void *hdr;
879
880 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
881 NFC_CMD_LLC_GET_PARAMS);
882 if (!hdr)
883 return -EMSGSIZE;
884
885 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
886 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
887 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
888 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
889 goto nla_put_failure;
890
891 return genlmsg_end(msg, hdr);
892
893 nla_put_failure:
894
895 genlmsg_cancel(msg, hdr);
896 return -EMSGSIZE;
897 }
898
899 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
900 {
901 struct nfc_dev *dev;
902 struct nfc_llcp_local *local;
903 int rc = 0;
904 struct sk_buff *msg = NULL;
905 u32 idx;
906
907 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
908 return -EINVAL;
909
910 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
911
912 dev = nfc_get_device(idx);
913 if (!dev)
914 return -ENODEV;
915
916 device_lock(&dev->dev);
917
918 local = nfc_llcp_find_local(dev);
919 if (!local) {
920 rc = -ENODEV;
921 goto exit;
922 }
923
924 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
925 if (!msg) {
926 rc = -ENOMEM;
927 goto exit;
928 }
929
930 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
931
932 exit:
933 device_unlock(&dev->dev);
934
935 nfc_put_device(dev);
936
937 if (rc < 0) {
938 if (msg)
939 nlmsg_free(msg);
940
941 return rc;
942 }
943
944 return genlmsg_reply(msg, info);
945 }
946
947 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
948 {
949 struct nfc_dev *dev;
950 struct nfc_llcp_local *local;
951 u8 rw = 0;
952 u16 miux = 0;
953 u32 idx;
954 int rc = 0;
955
956 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
957 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
958 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
959 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
960 return -EINVAL;
961
962 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
963 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
964
965 if (rw > LLCP_MAX_RW)
966 return -EINVAL;
967 }
968
969 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
970 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
971
972 if (miux > LLCP_MAX_MIUX)
973 return -EINVAL;
974 }
975
976 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
977
978 dev = nfc_get_device(idx);
979 if (!dev)
980 return -ENODEV;
981
982 device_lock(&dev->dev);
983
984 local = nfc_llcp_find_local(dev);
985 if (!local) {
986 nfc_put_device(dev);
987 rc = -ENODEV;
988 goto exit;
989 }
990
991 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
992 if (dev->dep_link_up) {
993 rc = -EINPROGRESS;
994 goto exit;
995 }
996
997 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
998 }
999
1000 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1001 local->rw = rw;
1002
1003 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1004 local->miux = cpu_to_be16(miux);
1005
1006 exit:
1007 device_unlock(&dev->dev);
1008
1009 nfc_put_device(dev);
1010
1011 return rc;
1012 }
1013
1014 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1015 {
1016 struct nfc_dev *dev;
1017 struct nfc_llcp_local *local;
1018 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1019 u32 idx;
1020 u8 tid;
1021 char *uri;
1022 int rc = 0, rem;
1023 size_t uri_len, tlvs_len;
1024 struct hlist_head sdreq_list;
1025 struct nfc_llcp_sdp_tlv *sdreq;
1026
1027 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1028 !info->attrs[NFC_ATTR_LLC_SDP])
1029 return -EINVAL;
1030
1031 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1032
1033 dev = nfc_get_device(idx);
1034 if (!dev) {
1035 rc = -ENODEV;
1036 goto exit;
1037 }
1038
1039 device_lock(&dev->dev);
1040
1041 if (dev->dep_link_up == false) {
1042 rc = -ENOLINK;
1043 goto exit;
1044 }
1045
1046 local = nfc_llcp_find_local(dev);
1047 if (!local) {
1048 nfc_put_device(dev);
1049 rc = -ENODEV;
1050 goto exit;
1051 }
1052
1053 INIT_HLIST_HEAD(&sdreq_list);
1054
1055 tlvs_len = 0;
1056
1057 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1058 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
1059 nfc_sdp_genl_policy);
1060
1061 if (rc != 0) {
1062 rc = -EINVAL;
1063 goto exit;
1064 }
1065
1066 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1067 continue;
1068
1069 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1070 if (uri_len == 0)
1071 continue;
1072
1073 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1074 if (uri == NULL || *uri == 0)
1075 continue;
1076
1077 tid = local->sdreq_next_tid++;
1078
1079 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1080 if (sdreq == NULL) {
1081 rc = -ENOMEM;
1082 goto exit;
1083 }
1084
1085 tlvs_len += sdreq->tlv_len;
1086
1087 hlist_add_head(&sdreq->node, &sdreq_list);
1088 }
1089
1090 if (hlist_empty(&sdreq_list)) {
1091 rc = -EINVAL;
1092 goto exit;
1093 }
1094
1095 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1096 exit:
1097 device_unlock(&dev->dev);
1098
1099 nfc_put_device(dev);
1100
1101 return rc;
1102 }
1103
1104 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1105 {
1106 struct nfc_dev *dev;
1107 int rc;
1108 u32 idx;
1109 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1110
1111 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1112 return -EINVAL;
1113
1114 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1115
1116 dev = nfc_get_device(idx);
1117 if (!dev)
1118 return -ENODEV;
1119
1120 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1121 sizeof(firmware_name));
1122
1123 rc = nfc_fw_download(dev, firmware_name);
1124
1125 nfc_put_device(dev);
1126 return rc;
1127 }
1128
1129 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1130 u32 result)
1131 {
1132 struct sk_buff *msg;
1133 void *hdr;
1134
1135 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1136 if (!msg)
1137 return -ENOMEM;
1138
1139 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1140 NFC_CMD_FW_DOWNLOAD);
1141 if (!hdr)
1142 goto free_msg;
1143
1144 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1145 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1146 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1147 goto nla_put_failure;
1148
1149 genlmsg_end(msg, hdr);
1150
1151 genlmsg_multicast(&nfc_genl_family, msg, 0,
1152 nfc_genl_event_mcgrp.id, GFP_KERNEL);
1153
1154 return 0;
1155
1156 nla_put_failure:
1157 genlmsg_cancel(msg, hdr);
1158 free_msg:
1159 nlmsg_free(msg);
1160 return -EMSGSIZE;
1161 }
1162
1163 static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1164 {
1165 struct nfc_dev *dev;
1166 int rc;
1167 u32 idx, se_idx;
1168
1169 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1170 !info->attrs[NFC_ATTR_SE_INDEX])
1171 return -EINVAL;
1172
1173 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1174 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1175
1176 dev = nfc_get_device(idx);
1177 if (!dev)
1178 return -ENODEV;
1179
1180 rc = nfc_enable_se(dev, se_idx);
1181
1182 nfc_put_device(dev);
1183 return rc;
1184 }
1185
1186 static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1187 {
1188 struct nfc_dev *dev;
1189 int rc;
1190 u32 idx, se_idx;
1191
1192 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1193 !info->attrs[NFC_ATTR_SE_INDEX])
1194 return -EINVAL;
1195
1196 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1197 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1198
1199 dev = nfc_get_device(idx);
1200 if (!dev)
1201 return -ENODEV;
1202
1203 rc = nfc_disable_se(dev, se_idx);
1204
1205 nfc_put_device(dev);
1206 return rc;
1207 }
1208
1209 static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1210 u32 portid, u32 seq,
1211 struct netlink_callback *cb,
1212 int flags)
1213 {
1214 void *hdr;
1215 struct nfc_se *se, *n;
1216
1217 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1218 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1219 NFC_CMD_GET_SE);
1220 if (!hdr)
1221 goto nla_put_failure;
1222
1223 if (cb)
1224 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
1225
1226 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1227 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1228 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1229 goto nla_put_failure;
1230
1231 if (genlmsg_end(msg, hdr) < 0)
1232 goto nla_put_failure;
1233 }
1234
1235 return 0;
1236
1237 nla_put_failure:
1238 genlmsg_cancel(msg, hdr);
1239 return -EMSGSIZE;
1240 }
1241
1242 static int nfc_genl_dump_ses(struct sk_buff *skb,
1243 struct netlink_callback *cb)
1244 {
1245 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1246 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1247 bool first_call = false;
1248
1249 if (!iter) {
1250 first_call = true;
1251 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1252 if (!iter)
1253 return -ENOMEM;
1254 cb->args[0] = (long) iter;
1255 }
1256
1257 mutex_lock(&nfc_devlist_mutex);
1258
1259 cb->seq = nfc_devlist_generation;
1260
1261 if (first_call) {
1262 nfc_device_iter_init(iter);
1263 dev = nfc_device_iter_next(iter);
1264 }
1265
1266 while (dev) {
1267 int rc;
1268
1269 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1270 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1271 if (rc < 0)
1272 break;
1273
1274 dev = nfc_device_iter_next(iter);
1275 }
1276
1277 mutex_unlock(&nfc_devlist_mutex);
1278
1279 cb->args[1] = (long) dev;
1280
1281 return skb->len;
1282 }
1283
1284 static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1285 {
1286 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1287
1288 nfc_device_iter_exit(iter);
1289 kfree(iter);
1290
1291 return 0;
1292 }
1293
1294 struct se_io_ctx {
1295 u32 dev_idx;
1296 u32 se_idx;
1297 };
1298
1299 static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1300 {
1301 struct se_io_ctx *ctx = context;
1302 struct sk_buff *msg;
1303 void *hdr;
1304
1305 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1306 if (!msg) {
1307 kfree(ctx);
1308 return;
1309 }
1310
1311 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1312 NFC_CMD_SE_IO);
1313 if (!hdr)
1314 goto free_msg;
1315
1316 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1317 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1318 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1319 goto nla_put_failure;
1320
1321 genlmsg_end(msg, hdr);
1322
1323 genlmsg_multicast(&nfc_genl_family, msg, 0,
1324 nfc_genl_event_mcgrp.id, GFP_KERNEL);
1325
1326 kfree(ctx);
1327
1328 return;
1329
1330 nla_put_failure:
1331 genlmsg_cancel(msg, hdr);
1332 free_msg:
1333 nlmsg_free(msg);
1334 kfree(ctx);
1335
1336 return;
1337 }
1338
1339 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1340 {
1341 struct nfc_dev *dev;
1342 struct se_io_ctx *ctx;
1343 u32 dev_idx, se_idx;
1344 u8 *apdu;
1345 size_t apdu_len;
1346
1347 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1348 !info->attrs[NFC_ATTR_SE_INDEX] ||
1349 !info->attrs[NFC_ATTR_SE_APDU])
1350 return -EINVAL;
1351
1352 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1353 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1354
1355 dev = nfc_get_device(dev_idx);
1356 if (!dev)
1357 return -ENODEV;
1358
1359 if (!dev->ops || !dev->ops->se_io)
1360 return -ENOTSUPP;
1361
1362 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1363 if (apdu_len == 0)
1364 return -EINVAL;
1365
1366 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1367 if (!apdu)
1368 return -EINVAL;
1369
1370 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1371 if (!ctx)
1372 return -ENOMEM;
1373
1374 ctx->dev_idx = dev_idx;
1375 ctx->se_idx = se_idx;
1376
1377 return dev->ops->se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1378 }
1379
1380 static const struct genl_ops nfc_genl_ops[] = {
1381 {
1382 .cmd = NFC_CMD_GET_DEVICE,
1383 .doit = nfc_genl_get_device,
1384 .dumpit = nfc_genl_dump_devices,
1385 .done = nfc_genl_dump_devices_done,
1386 .policy = nfc_genl_policy,
1387 },
1388 {
1389 .cmd = NFC_CMD_DEV_UP,
1390 .doit = nfc_genl_dev_up,
1391 .policy = nfc_genl_policy,
1392 },
1393 {
1394 .cmd = NFC_CMD_DEV_DOWN,
1395 .doit = nfc_genl_dev_down,
1396 .policy = nfc_genl_policy,
1397 },
1398 {
1399 .cmd = NFC_CMD_START_POLL,
1400 .doit = nfc_genl_start_poll,
1401 .policy = nfc_genl_policy,
1402 },
1403 {
1404 .cmd = NFC_CMD_STOP_POLL,
1405 .doit = nfc_genl_stop_poll,
1406 .policy = nfc_genl_policy,
1407 },
1408 {
1409 .cmd = NFC_CMD_DEP_LINK_UP,
1410 .doit = nfc_genl_dep_link_up,
1411 .policy = nfc_genl_policy,
1412 },
1413 {
1414 .cmd = NFC_CMD_DEP_LINK_DOWN,
1415 .doit = nfc_genl_dep_link_down,
1416 .policy = nfc_genl_policy,
1417 },
1418 {
1419 .cmd = NFC_CMD_GET_TARGET,
1420 .dumpit = nfc_genl_dump_targets,
1421 .done = nfc_genl_dump_targets_done,
1422 .policy = nfc_genl_policy,
1423 },
1424 {
1425 .cmd = NFC_CMD_LLC_GET_PARAMS,
1426 .doit = nfc_genl_llc_get_params,
1427 .policy = nfc_genl_policy,
1428 },
1429 {
1430 .cmd = NFC_CMD_LLC_SET_PARAMS,
1431 .doit = nfc_genl_llc_set_params,
1432 .policy = nfc_genl_policy,
1433 },
1434 {
1435 .cmd = NFC_CMD_LLC_SDREQ,
1436 .doit = nfc_genl_llc_sdreq,
1437 .policy = nfc_genl_policy,
1438 },
1439 {
1440 .cmd = NFC_CMD_FW_DOWNLOAD,
1441 .doit = nfc_genl_fw_download,
1442 .policy = nfc_genl_policy,
1443 },
1444 {
1445 .cmd = NFC_CMD_ENABLE_SE,
1446 .doit = nfc_genl_enable_se,
1447 .policy = nfc_genl_policy,
1448 },
1449 {
1450 .cmd = NFC_CMD_DISABLE_SE,
1451 .doit = nfc_genl_disable_se,
1452 .policy = nfc_genl_policy,
1453 },
1454 {
1455 .cmd = NFC_CMD_GET_SE,
1456 .dumpit = nfc_genl_dump_ses,
1457 .done = nfc_genl_dump_ses_done,
1458 .policy = nfc_genl_policy,
1459 },
1460 {
1461 .cmd = NFC_CMD_SE_IO,
1462 .doit = nfc_genl_se_io,
1463 .policy = nfc_genl_policy,
1464 },
1465 };
1466
1467
1468 struct urelease_work {
1469 struct work_struct w;
1470 int portid;
1471 };
1472
1473 static void nfc_urelease_event_work(struct work_struct *work)
1474 {
1475 struct urelease_work *w = container_of(work, struct urelease_work, w);
1476 struct class_dev_iter iter;
1477 struct nfc_dev *dev;
1478
1479 pr_debug("portid %d\n", w->portid);
1480
1481 mutex_lock(&nfc_devlist_mutex);
1482
1483 nfc_device_iter_init(&iter);
1484 dev = nfc_device_iter_next(&iter);
1485
1486 while (dev) {
1487 mutex_lock(&dev->genl_data.genl_data_mutex);
1488
1489 if (dev->genl_data.poll_req_portid == w->portid) {
1490 nfc_stop_poll(dev);
1491 dev->genl_data.poll_req_portid = 0;
1492 }
1493
1494 mutex_unlock(&dev->genl_data.genl_data_mutex);
1495
1496 dev = nfc_device_iter_next(&iter);
1497 }
1498
1499 nfc_device_iter_exit(&iter);
1500
1501 mutex_unlock(&nfc_devlist_mutex);
1502
1503 kfree(w);
1504 }
1505
1506 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1507 unsigned long event, void *ptr)
1508 {
1509 struct netlink_notify *n = ptr;
1510 struct urelease_work *w;
1511
1512 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1513 goto out;
1514
1515 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1516
1517 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1518 if (w) {
1519 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1520 w->portid = n->portid;
1521 schedule_work((struct work_struct *) w);
1522 }
1523
1524 out:
1525 return NOTIFY_DONE;
1526 }
1527
1528 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1529 {
1530 genl_data->poll_req_portid = 0;
1531 mutex_init(&genl_data->genl_data_mutex);
1532 }
1533
1534 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1535 {
1536 mutex_destroy(&genl_data->genl_data_mutex);
1537 }
1538
1539 static struct notifier_block nl_notifier = {
1540 .notifier_call = nfc_genl_rcv_nl_event,
1541 };
1542
1543 /**
1544 * nfc_genl_init() - Initialize netlink interface
1545 *
1546 * This initialization function registers the nfc netlink family.
1547 */
1548 int __init nfc_genl_init(void)
1549 {
1550 int rc;
1551
1552 rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops);
1553 if (rc)
1554 return rc;
1555
1556 rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp);
1557
1558 netlink_register_notifier(&nl_notifier);
1559
1560 return rc;
1561 }
1562
1563 /**
1564 * nfc_genl_exit() - Deinitialize netlink interface
1565 *
1566 * This exit function unregisters the nfc netlink family.
1567 */
1568 void nfc_genl_exit(void)
1569 {
1570 netlink_unregister_notifier(&nl_notifier);
1571 genl_unregister_family(&nfc_genl_family);
1572 }
Linux kernel - Deliverables
This page took 0.079701 seconds and 4 git commands to generate.