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44989fc8cddf19550a7a525503f9d267099470b2
[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, see <http://www.gnu.org/licenses/>.
20 */
21
22 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
23
24 #include <net/genetlink.h>
25 #include <linux/nfc.h>
26 #include <linux/slab.h>
27
28 #include "nfc.h"
29 #include "llcp.h"
30
31 static const struct genl_multicast_group nfc_genl_mcgrps[] = {
32 { .name = NFC_GENL_MCAST_EVENT_NAME, },
33 };
34
35 static struct genl_family nfc_genl_family = {
36 .id = GENL_ID_GENERATE,
37 .hdrsize = 0,
38 .name = NFC_GENL_NAME,
39 .version = NFC_GENL_VERSION,
40 .maxattr = NFC_ATTR_MAX,
41 };
42
43 static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
44 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
45 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
46 .len = NFC_DEVICE_NAME_MAXSIZE },
47 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
48 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
49 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
50 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
51 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
52 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
53 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
54 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
55 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
56 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
57 [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
58 .len = NFC_FIRMWARE_NAME_MAXSIZE },
59 [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
60 };
61
62 static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
63 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING },
64 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
65 };
66
67 static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
68 struct netlink_callback *cb, int flags)
69 {
70 void *hdr;
71
72 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
73 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
74 if (!hdr)
75 return -EMSGSIZE;
76
77 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
78
79 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
80 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
81 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
82 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
83 goto nla_put_failure;
84 if (target->nfcid1_len > 0 &&
85 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
86 target->nfcid1))
87 goto nla_put_failure;
88 if (target->sensb_res_len > 0 &&
89 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
90 target->sensb_res))
91 goto nla_put_failure;
92 if (target->sensf_res_len > 0 &&
93 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
94 target->sensf_res))
95 goto nla_put_failure;
96
97 if (target->is_iso15693) {
98 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
99 target->iso15693_dsfid) ||
100 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
101 sizeof(target->iso15693_uid), target->iso15693_uid))
102 goto nla_put_failure;
103 }
104
105 return genlmsg_end(msg, hdr);
106
107 nla_put_failure:
108 genlmsg_cancel(msg, hdr);
109 return -EMSGSIZE;
110 }
111
112 static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
113 {
114 struct nfc_dev *dev;
115 int rc;
116 u32 idx;
117
118 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
119 nfc_genl_family.attrbuf,
120 nfc_genl_family.maxattr,
121 nfc_genl_policy);
122 if (rc < 0)
123 return ERR_PTR(rc);
124
125 if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX])
126 return ERR_PTR(-EINVAL);
127
128 idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]);
129
130 dev = nfc_get_device(idx);
131 if (!dev)
132 return ERR_PTR(-ENODEV);
133
134 return dev;
135 }
136
137 static int nfc_genl_dump_targets(struct sk_buff *skb,
138 struct netlink_callback *cb)
139 {
140 int i = cb->args[0];
141 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
142 int rc;
143
144 if (!dev) {
145 dev = __get_device_from_cb(cb);
146 if (IS_ERR(dev))
147 return PTR_ERR(dev);
148
149 cb->args[1] = (long) dev;
150 }
151
152 device_lock(&dev->dev);
153
154 cb->seq = dev->targets_generation;
155
156 while (i < dev->n_targets) {
157 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
158 NLM_F_MULTI);
159 if (rc < 0)
160 break;
161
162 i++;
163 }
164
165 device_unlock(&dev->dev);
166
167 cb->args[0] = i;
168
169 return skb->len;
170 }
171
172 static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
173 {
174 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
175
176 if (dev)
177 nfc_put_device(dev);
178
179 return 0;
180 }
181
182 int nfc_genl_targets_found(struct nfc_dev *dev)
183 {
184 struct sk_buff *msg;
185 void *hdr;
186
187 dev->genl_data.poll_req_portid = 0;
188
189 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
190 if (!msg)
191 return -ENOMEM;
192
193 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
194 NFC_EVENT_TARGETS_FOUND);
195 if (!hdr)
196 goto free_msg;
197
198 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
199 goto nla_put_failure;
200
201 genlmsg_end(msg, hdr);
202
203 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
204
205 nla_put_failure:
206 genlmsg_cancel(msg, hdr);
207 free_msg:
208 nlmsg_free(msg);
209 return -EMSGSIZE;
210 }
211
212 int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
213 {
214 struct sk_buff *msg;
215 void *hdr;
216
217 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
218 if (!msg)
219 return -ENOMEM;
220
221 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
222 NFC_EVENT_TARGET_LOST);
223 if (!hdr)
224 goto free_msg;
225
226 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
227 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
228 goto nla_put_failure;
229
230 genlmsg_end(msg, hdr);
231
232 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
233
234 return 0;
235
236 nla_put_failure:
237 genlmsg_cancel(msg, hdr);
238 free_msg:
239 nlmsg_free(msg);
240 return -EMSGSIZE;
241 }
242
243 int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
244 {
245 struct sk_buff *msg;
246 void *hdr;
247
248 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
249 if (!msg)
250 return -ENOMEM;
251
252 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
253 NFC_EVENT_TM_ACTIVATED);
254 if (!hdr)
255 goto free_msg;
256
257 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
258 goto nla_put_failure;
259 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
260 goto nla_put_failure;
261
262 genlmsg_end(msg, hdr);
263
264 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
265
266 return 0;
267
268 nla_put_failure:
269 genlmsg_cancel(msg, hdr);
270 free_msg:
271 nlmsg_free(msg);
272 return -EMSGSIZE;
273 }
274
275 int nfc_genl_tm_deactivated(struct nfc_dev *dev)
276 {
277 struct sk_buff *msg;
278 void *hdr;
279
280 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
281 if (!msg)
282 return -ENOMEM;
283
284 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
285 NFC_EVENT_TM_DEACTIVATED);
286 if (!hdr)
287 goto free_msg;
288
289 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
290 goto nla_put_failure;
291
292 genlmsg_end(msg, hdr);
293
294 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
295
296 return 0;
297
298 nla_put_failure:
299 genlmsg_cancel(msg, hdr);
300 free_msg:
301 nlmsg_free(msg);
302 return -EMSGSIZE;
303 }
304
305 int nfc_genl_device_added(struct nfc_dev *dev)
306 {
307 struct sk_buff *msg;
308 void *hdr;
309
310 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
311 if (!msg)
312 return -ENOMEM;
313
314 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
315 NFC_EVENT_DEVICE_ADDED);
316 if (!hdr)
317 goto free_msg;
318
319 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
320 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
321 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
322 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
323 goto nla_put_failure;
324
325 genlmsg_end(msg, hdr);
326
327 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
328
329 return 0;
330
331 nla_put_failure:
332 genlmsg_cancel(msg, hdr);
333 free_msg:
334 nlmsg_free(msg);
335 return -EMSGSIZE;
336 }
337
338 int nfc_genl_device_removed(struct nfc_dev *dev)
339 {
340 struct sk_buff *msg;
341 void *hdr;
342
343 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
344 if (!msg)
345 return -ENOMEM;
346
347 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
348 NFC_EVENT_DEVICE_REMOVED);
349 if (!hdr)
350 goto free_msg;
351
352 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
353 goto nla_put_failure;
354
355 genlmsg_end(msg, hdr);
356
357 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, 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, 0, GFP_ATOMIC);
424
425 nla_put_failure:
426 genlmsg_cancel(msg, hdr);
427
428 free_msg:
429 nlmsg_free(msg);
430
431 nfc_llcp_free_sdp_tlv_list(sdres_list);
432
433 return rc;
434 }
435
436 int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
437 {
438 struct sk_buff *msg;
439 void *hdr;
440
441 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
442 if (!msg)
443 return -ENOMEM;
444
445 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
446 NFC_EVENT_SE_ADDED);
447 if (!hdr)
448 goto free_msg;
449
450 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
451 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
452 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
453 goto nla_put_failure;
454
455 genlmsg_end(msg, hdr);
456
457 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
458
459 return 0;
460
461 nla_put_failure:
462 genlmsg_cancel(msg, hdr);
463 free_msg:
464 nlmsg_free(msg);
465 return -EMSGSIZE;
466 }
467
468 int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
469 {
470 struct sk_buff *msg;
471 void *hdr;
472
473 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
474 if (!msg)
475 return -ENOMEM;
476
477 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
478 NFC_EVENT_SE_REMOVED);
479 if (!hdr)
480 goto free_msg;
481
482 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
483 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
484 goto nla_put_failure;
485
486 genlmsg_end(msg, hdr);
487
488 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
489
490 return 0;
491
492 nla_put_failure:
493 genlmsg_cancel(msg, hdr);
494 free_msg:
495 nlmsg_free(msg);
496 return -EMSGSIZE;
497 }
498
499 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
500 u32 portid, u32 seq,
501 struct netlink_callback *cb,
502 int flags)
503 {
504 void *hdr;
505
506 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
507 NFC_CMD_GET_DEVICE);
508 if (!hdr)
509 return -EMSGSIZE;
510
511 if (cb)
512 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
513
514 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
515 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
516 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
517 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
518 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
519 goto nla_put_failure;
520
521 return genlmsg_end(msg, hdr);
522
523 nla_put_failure:
524 genlmsg_cancel(msg, hdr);
525 return -EMSGSIZE;
526 }
527
528 static int nfc_genl_dump_devices(struct sk_buff *skb,
529 struct netlink_callback *cb)
530 {
531 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
532 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
533 bool first_call = false;
534
535 if (!iter) {
536 first_call = true;
537 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
538 if (!iter)
539 return -ENOMEM;
540 cb->args[0] = (long) iter;
541 }
542
543 mutex_lock(&nfc_devlist_mutex);
544
545 cb->seq = nfc_devlist_generation;
546
547 if (first_call) {
548 nfc_device_iter_init(iter);
549 dev = nfc_device_iter_next(iter);
550 }
551
552 while (dev) {
553 int rc;
554
555 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
556 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
557 if (rc < 0)
558 break;
559
560 dev = nfc_device_iter_next(iter);
561 }
562
563 mutex_unlock(&nfc_devlist_mutex);
564
565 cb->args[1] = (long) dev;
566
567 return skb->len;
568 }
569
570 static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
571 {
572 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
573
574 nfc_device_iter_exit(iter);
575 kfree(iter);
576
577 return 0;
578 }
579
580 int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
581 u8 comm_mode, u8 rf_mode)
582 {
583 struct sk_buff *msg;
584 void *hdr;
585
586 pr_debug("DEP link is up\n");
587
588 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
589 if (!msg)
590 return -ENOMEM;
591
592 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
593 if (!hdr)
594 goto free_msg;
595
596 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
597 goto nla_put_failure;
598 if (rf_mode == NFC_RF_INITIATOR &&
599 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
600 goto nla_put_failure;
601 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
602 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
603 goto nla_put_failure;
604
605 genlmsg_end(msg, hdr);
606
607 dev->dep_link_up = true;
608
609 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
610
611 return 0;
612
613 nla_put_failure:
614 genlmsg_cancel(msg, hdr);
615 free_msg:
616 nlmsg_free(msg);
617 return -EMSGSIZE;
618 }
619
620 int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
621 {
622 struct sk_buff *msg;
623 void *hdr;
624
625 pr_debug("DEP link is down\n");
626
627 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
628 if (!msg)
629 return -ENOMEM;
630
631 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
632 NFC_CMD_DEP_LINK_DOWN);
633 if (!hdr)
634 goto free_msg;
635
636 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
637 goto nla_put_failure;
638
639 genlmsg_end(msg, hdr);
640
641 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
642
643 return 0;
644
645 nla_put_failure:
646 genlmsg_cancel(msg, hdr);
647 free_msg:
648 nlmsg_free(msg);
649 return -EMSGSIZE;
650 }
651
652 static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
653 {
654 struct sk_buff *msg;
655 struct nfc_dev *dev;
656 u32 idx;
657 int rc = -ENOBUFS;
658
659 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
660 return -EINVAL;
661
662 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
663
664 dev = nfc_get_device(idx);
665 if (!dev)
666 return -ENODEV;
667
668 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
669 if (!msg) {
670 rc = -ENOMEM;
671 goto out_putdev;
672 }
673
674 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
675 NULL, 0);
676 if (rc < 0)
677 goto out_free;
678
679 nfc_put_device(dev);
680
681 return genlmsg_reply(msg, info);
682
683 out_free:
684 nlmsg_free(msg);
685 out_putdev:
686 nfc_put_device(dev);
687 return rc;
688 }
689
690 static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
691 {
692 struct nfc_dev *dev;
693 int rc;
694 u32 idx;
695
696 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
697 return -EINVAL;
698
699 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
700
701 dev = nfc_get_device(idx);
702 if (!dev)
703 return -ENODEV;
704
705 rc = nfc_dev_up(dev);
706
707 nfc_put_device(dev);
708 return rc;
709 }
710
711 static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
712 {
713 struct nfc_dev *dev;
714 int rc;
715 u32 idx;
716
717 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
718 return -EINVAL;
719
720 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
721
722 dev = nfc_get_device(idx);
723 if (!dev)
724 return -ENODEV;
725
726 rc = nfc_dev_down(dev);
727
728 nfc_put_device(dev);
729 return rc;
730 }
731
732 static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
733 {
734 struct nfc_dev *dev;
735 int rc;
736 u32 idx;
737 u32 im_protocols = 0, tm_protocols = 0;
738
739 pr_debug("Poll start\n");
740
741 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
742 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
743 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
744 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
745 return -EINVAL;
746
747 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
748
749 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
750 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
751
752 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
753 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
754 else if (info->attrs[NFC_ATTR_PROTOCOLS])
755 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
756
757 dev = nfc_get_device(idx);
758 if (!dev)
759 return -ENODEV;
760
761 mutex_lock(&dev->genl_data.genl_data_mutex);
762
763 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
764 if (!rc)
765 dev->genl_data.poll_req_portid = info->snd_portid;
766
767 mutex_unlock(&dev->genl_data.genl_data_mutex);
768
769 nfc_put_device(dev);
770 return rc;
771 }
772
773 static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
774 {
775 struct nfc_dev *dev;
776 int rc;
777 u32 idx;
778
779 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
780 return -EINVAL;
781
782 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
783
784 dev = nfc_get_device(idx);
785 if (!dev)
786 return -ENODEV;
787
788 device_lock(&dev->dev);
789
790 if (!dev->polling) {
791 device_unlock(&dev->dev);
792 return -EINVAL;
793 }
794
795 device_unlock(&dev->dev);
796
797 mutex_lock(&dev->genl_data.genl_data_mutex);
798
799 if (dev->genl_data.poll_req_portid != info->snd_portid) {
800 rc = -EBUSY;
801 goto out;
802 }
803
804 rc = nfc_stop_poll(dev);
805 dev->genl_data.poll_req_portid = 0;
806
807 out:
808 mutex_unlock(&dev->genl_data.genl_data_mutex);
809 nfc_put_device(dev);
810 return rc;
811 }
812
813 static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
814 {
815 struct nfc_dev *dev;
816 u32 device_idx, target_idx, protocol;
817 int rc;
818
819 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
820 return -EINVAL;
821
822 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
823
824 dev = nfc_get_device(device_idx);
825 if (!dev)
826 return -ENODEV;
827
828 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
829 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
830
831 nfc_deactivate_target(dev, target_idx);
832 rc = nfc_activate_target(dev, target_idx, protocol);
833
834 nfc_put_device(dev);
835 return 0;
836 }
837
838 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
839 {
840 struct nfc_dev *dev;
841 int rc, tgt_idx;
842 u32 idx;
843 u8 comm;
844
845 pr_debug("DEP link up\n");
846
847 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
848 !info->attrs[NFC_ATTR_COMM_MODE])
849 return -EINVAL;
850
851 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
852 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
853 tgt_idx = NFC_TARGET_IDX_ANY;
854 else
855 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
856
857 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
858
859 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
860 return -EINVAL;
861
862 dev = nfc_get_device(idx);
863 if (!dev)
864 return -ENODEV;
865
866 rc = nfc_dep_link_up(dev, tgt_idx, comm);
867
868 nfc_put_device(dev);
869
870 return rc;
871 }
872
873 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
874 {
875 struct nfc_dev *dev;
876 int rc;
877 u32 idx;
878
879 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
880 return -EINVAL;
881
882 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
883
884 dev = nfc_get_device(idx);
885 if (!dev)
886 return -ENODEV;
887
888 rc = nfc_dep_link_down(dev);
889
890 nfc_put_device(dev);
891 return rc;
892 }
893
894 static int nfc_genl_send_params(struct sk_buff *msg,
895 struct nfc_llcp_local *local,
896 u32 portid, u32 seq)
897 {
898 void *hdr;
899
900 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
901 NFC_CMD_LLC_GET_PARAMS);
902 if (!hdr)
903 return -EMSGSIZE;
904
905 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
906 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
907 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
908 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
909 goto nla_put_failure;
910
911 return genlmsg_end(msg, hdr);
912
913 nla_put_failure:
914
915 genlmsg_cancel(msg, hdr);
916 return -EMSGSIZE;
917 }
918
919 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
920 {
921 struct nfc_dev *dev;
922 struct nfc_llcp_local *local;
923 int rc = 0;
924 struct sk_buff *msg = NULL;
925 u32 idx;
926
927 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
928 return -EINVAL;
929
930 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
931
932 dev = nfc_get_device(idx);
933 if (!dev)
934 return -ENODEV;
935
936 device_lock(&dev->dev);
937
938 local = nfc_llcp_find_local(dev);
939 if (!local) {
940 rc = -ENODEV;
941 goto exit;
942 }
943
944 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
945 if (!msg) {
946 rc = -ENOMEM;
947 goto exit;
948 }
949
950 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
951
952 exit:
953 device_unlock(&dev->dev);
954
955 nfc_put_device(dev);
956
957 if (rc < 0) {
958 if (msg)
959 nlmsg_free(msg);
960
961 return rc;
962 }
963
964 return genlmsg_reply(msg, info);
965 }
966
967 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
968 {
969 struct nfc_dev *dev;
970 struct nfc_llcp_local *local;
971 u8 rw = 0;
972 u16 miux = 0;
973 u32 idx;
974 int rc = 0;
975
976 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
977 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
978 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
979 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
980 return -EINVAL;
981
982 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
983 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
984
985 if (rw > LLCP_MAX_RW)
986 return -EINVAL;
987 }
988
989 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
990 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
991
992 if (miux > LLCP_MAX_MIUX)
993 return -EINVAL;
994 }
995
996 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
997
998 dev = nfc_get_device(idx);
999 if (!dev)
1000 return -ENODEV;
1001
1002 device_lock(&dev->dev);
1003
1004 local = nfc_llcp_find_local(dev);
1005 if (!local) {
1006 nfc_put_device(dev);
1007 rc = -ENODEV;
1008 goto exit;
1009 }
1010
1011 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1012 if (dev->dep_link_up) {
1013 rc = -EINPROGRESS;
1014 goto exit;
1015 }
1016
1017 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1018 }
1019
1020 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1021 local->rw = rw;
1022
1023 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1024 local->miux = cpu_to_be16(miux);
1025
1026 exit:
1027 device_unlock(&dev->dev);
1028
1029 nfc_put_device(dev);
1030
1031 return rc;
1032 }
1033
1034 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1035 {
1036 struct nfc_dev *dev;
1037 struct nfc_llcp_local *local;
1038 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1039 u32 idx;
1040 u8 tid;
1041 char *uri;
1042 int rc = 0, rem;
1043 size_t uri_len, tlvs_len;
1044 struct hlist_head sdreq_list;
1045 struct nfc_llcp_sdp_tlv *sdreq;
1046
1047 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1048 !info->attrs[NFC_ATTR_LLC_SDP])
1049 return -EINVAL;
1050
1051 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1052
1053 dev = nfc_get_device(idx);
1054 if (!dev) {
1055 rc = -ENODEV;
1056 goto exit;
1057 }
1058
1059 device_lock(&dev->dev);
1060
1061 if (dev->dep_link_up == false) {
1062 rc = -ENOLINK;
1063 goto exit;
1064 }
1065
1066 local = nfc_llcp_find_local(dev);
1067 if (!local) {
1068 nfc_put_device(dev);
1069 rc = -ENODEV;
1070 goto exit;
1071 }
1072
1073 INIT_HLIST_HEAD(&sdreq_list);
1074
1075 tlvs_len = 0;
1076
1077 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1078 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
1079 nfc_sdp_genl_policy);
1080
1081 if (rc != 0) {
1082 rc = -EINVAL;
1083 goto exit;
1084 }
1085
1086 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1087 continue;
1088
1089 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1090 if (uri_len == 0)
1091 continue;
1092
1093 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1094 if (uri == NULL || *uri == 0)
1095 continue;
1096
1097 tid = local->sdreq_next_tid++;
1098
1099 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1100 if (sdreq == NULL) {
1101 rc = -ENOMEM;
1102 goto exit;
1103 }
1104
1105 tlvs_len += sdreq->tlv_len;
1106
1107 hlist_add_head(&sdreq->node, &sdreq_list);
1108 }
1109
1110 if (hlist_empty(&sdreq_list)) {
1111 rc = -EINVAL;
1112 goto exit;
1113 }
1114
1115 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1116 exit:
1117 device_unlock(&dev->dev);
1118
1119 nfc_put_device(dev);
1120
1121 return rc;
1122 }
1123
1124 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1125 {
1126 struct nfc_dev *dev;
1127 int rc;
1128 u32 idx;
1129 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1130
1131 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1132 return -EINVAL;
1133
1134 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1135
1136 dev = nfc_get_device(idx);
1137 if (!dev)
1138 return -ENODEV;
1139
1140 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1141 sizeof(firmware_name));
1142
1143 rc = nfc_fw_download(dev, firmware_name);
1144
1145 nfc_put_device(dev);
1146 return rc;
1147 }
1148
1149 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1150 u32 result)
1151 {
1152 struct sk_buff *msg;
1153 void *hdr;
1154
1155 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1156 if (!msg)
1157 return -ENOMEM;
1158
1159 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1160 NFC_CMD_FW_DOWNLOAD);
1161 if (!hdr)
1162 goto free_msg;
1163
1164 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1165 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1166 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1167 goto nla_put_failure;
1168
1169 genlmsg_end(msg, hdr);
1170
1171 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1172
1173 return 0;
1174
1175 nla_put_failure:
1176 genlmsg_cancel(msg, hdr);
1177 free_msg:
1178 nlmsg_free(msg);
1179 return -EMSGSIZE;
1180 }
1181
1182 static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1183 {
1184 struct nfc_dev *dev;
1185 int rc;
1186 u32 idx, se_idx;
1187
1188 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1189 !info->attrs[NFC_ATTR_SE_INDEX])
1190 return -EINVAL;
1191
1192 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1193 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1194
1195 dev = nfc_get_device(idx);
1196 if (!dev)
1197 return -ENODEV;
1198
1199 rc = nfc_enable_se(dev, se_idx);
1200
1201 nfc_put_device(dev);
1202 return rc;
1203 }
1204
1205 static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1206 {
1207 struct nfc_dev *dev;
1208 int rc;
1209 u32 idx, se_idx;
1210
1211 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1212 !info->attrs[NFC_ATTR_SE_INDEX])
1213 return -EINVAL;
1214
1215 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1216 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1217
1218 dev = nfc_get_device(idx);
1219 if (!dev)
1220 return -ENODEV;
1221
1222 rc = nfc_disable_se(dev, se_idx);
1223
1224 nfc_put_device(dev);
1225 return rc;
1226 }
1227
1228 static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1229 u32 portid, u32 seq,
1230 struct netlink_callback *cb,
1231 int flags)
1232 {
1233 void *hdr;
1234 struct nfc_se *se, *n;
1235
1236 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1237 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1238 NFC_CMD_GET_SE);
1239 if (!hdr)
1240 goto nla_put_failure;
1241
1242 if (cb)
1243 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
1244
1245 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1246 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1247 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1248 goto nla_put_failure;
1249
1250 if (genlmsg_end(msg, hdr) < 0)
1251 goto nla_put_failure;
1252 }
1253
1254 return 0;
1255
1256 nla_put_failure:
1257 genlmsg_cancel(msg, hdr);
1258 return -EMSGSIZE;
1259 }
1260
1261 static int nfc_genl_dump_ses(struct sk_buff *skb,
1262 struct netlink_callback *cb)
1263 {
1264 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1265 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1266 bool first_call = false;
1267
1268 if (!iter) {
1269 first_call = true;
1270 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1271 if (!iter)
1272 return -ENOMEM;
1273 cb->args[0] = (long) iter;
1274 }
1275
1276 mutex_lock(&nfc_devlist_mutex);
1277
1278 cb->seq = nfc_devlist_generation;
1279
1280 if (first_call) {
1281 nfc_device_iter_init(iter);
1282 dev = nfc_device_iter_next(iter);
1283 }
1284
1285 while (dev) {
1286 int rc;
1287
1288 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1289 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1290 if (rc < 0)
1291 break;
1292
1293 dev = nfc_device_iter_next(iter);
1294 }
1295
1296 mutex_unlock(&nfc_devlist_mutex);
1297
1298 cb->args[1] = (long) dev;
1299
1300 return skb->len;
1301 }
1302
1303 static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1304 {
1305 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1306
1307 nfc_device_iter_exit(iter);
1308 kfree(iter);
1309
1310 return 0;
1311 }
1312
1313 static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1314 u8 *apdu, size_t apdu_length,
1315 se_io_cb_t cb, void *cb_context)
1316 {
1317 struct nfc_se *se;
1318 int rc;
1319
1320 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1321
1322 device_lock(&dev->dev);
1323
1324 if (!device_is_registered(&dev->dev)) {
1325 rc = -ENODEV;
1326 goto error;
1327 }
1328
1329 if (!dev->dev_up) {
1330 rc = -ENODEV;
1331 goto error;
1332 }
1333
1334 if (!dev->ops->se_io) {
1335 rc = -EOPNOTSUPP;
1336 goto error;
1337 }
1338
1339 se = nfc_find_se(dev, se_idx);
1340 if (!se) {
1341 rc = -EINVAL;
1342 goto error;
1343 }
1344
1345 if (se->state != NFC_SE_ENABLED) {
1346 rc = -ENODEV;
1347 goto error;
1348 }
1349
1350 rc = dev->ops->se_io(dev, se_idx, apdu,
1351 apdu_length, cb, cb_context);
1352
1353 error:
1354 device_unlock(&dev->dev);
1355 return rc;
1356 }
1357
1358 struct se_io_ctx {
1359 u32 dev_idx;
1360 u32 se_idx;
1361 };
1362
1363 static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1364 {
1365 struct se_io_ctx *ctx = context;
1366 struct sk_buff *msg;
1367 void *hdr;
1368
1369 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1370 if (!msg) {
1371 kfree(ctx);
1372 return;
1373 }
1374
1375 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1376 NFC_CMD_SE_IO);
1377 if (!hdr)
1378 goto free_msg;
1379
1380 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1381 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1382 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1383 goto nla_put_failure;
1384
1385 genlmsg_end(msg, hdr);
1386
1387 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1388
1389 kfree(ctx);
1390
1391 return;
1392
1393 nla_put_failure:
1394 genlmsg_cancel(msg, hdr);
1395 free_msg:
1396 nlmsg_free(msg);
1397 kfree(ctx);
1398
1399 return;
1400 }
1401
1402 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1403 {
1404 struct nfc_dev *dev;
1405 struct se_io_ctx *ctx;
1406 u32 dev_idx, se_idx;
1407 u8 *apdu;
1408 size_t apdu_len;
1409
1410 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1411 !info->attrs[NFC_ATTR_SE_INDEX] ||
1412 !info->attrs[NFC_ATTR_SE_APDU])
1413 return -EINVAL;
1414
1415 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1416 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1417
1418 dev = nfc_get_device(dev_idx);
1419 if (!dev)
1420 return -ENODEV;
1421
1422 if (!dev->ops || !dev->ops->se_io)
1423 return -ENOTSUPP;
1424
1425 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1426 if (apdu_len == 0)
1427 return -EINVAL;
1428
1429 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1430 if (!apdu)
1431 return -EINVAL;
1432
1433 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1434 if (!ctx)
1435 return -ENOMEM;
1436
1437 ctx->dev_idx = dev_idx;
1438 ctx->se_idx = se_idx;
1439
1440 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1441 }
1442
1443 static const struct genl_ops nfc_genl_ops[] = {
1444 {
1445 .cmd = NFC_CMD_GET_DEVICE,
1446 .doit = nfc_genl_get_device,
1447 .dumpit = nfc_genl_dump_devices,
1448 .done = nfc_genl_dump_devices_done,
1449 .policy = nfc_genl_policy,
1450 },
1451 {
1452 .cmd = NFC_CMD_DEV_UP,
1453 .doit = nfc_genl_dev_up,
1454 .policy = nfc_genl_policy,
1455 },
1456 {
1457 .cmd = NFC_CMD_DEV_DOWN,
1458 .doit = nfc_genl_dev_down,
1459 .policy = nfc_genl_policy,
1460 },
1461 {
1462 .cmd = NFC_CMD_START_POLL,
1463 .doit = nfc_genl_start_poll,
1464 .policy = nfc_genl_policy,
1465 },
1466 {
1467 .cmd = NFC_CMD_STOP_POLL,
1468 .doit = nfc_genl_stop_poll,
1469 .policy = nfc_genl_policy,
1470 },
1471 {
1472 .cmd = NFC_CMD_DEP_LINK_UP,
1473 .doit = nfc_genl_dep_link_up,
1474 .policy = nfc_genl_policy,
1475 },
1476 {
1477 .cmd = NFC_CMD_DEP_LINK_DOWN,
1478 .doit = nfc_genl_dep_link_down,
1479 .policy = nfc_genl_policy,
1480 },
1481 {
1482 .cmd = NFC_CMD_GET_TARGET,
1483 .dumpit = nfc_genl_dump_targets,
1484 .done = nfc_genl_dump_targets_done,
1485 .policy = nfc_genl_policy,
1486 },
1487 {
1488 .cmd = NFC_CMD_LLC_GET_PARAMS,
1489 .doit = nfc_genl_llc_get_params,
1490 .policy = nfc_genl_policy,
1491 },
1492 {
1493 .cmd = NFC_CMD_LLC_SET_PARAMS,
1494 .doit = nfc_genl_llc_set_params,
1495 .policy = nfc_genl_policy,
1496 },
1497 {
1498 .cmd = NFC_CMD_LLC_SDREQ,
1499 .doit = nfc_genl_llc_sdreq,
1500 .policy = nfc_genl_policy,
1501 },
1502 {
1503 .cmd = NFC_CMD_FW_DOWNLOAD,
1504 .doit = nfc_genl_fw_download,
1505 .policy = nfc_genl_policy,
1506 },
1507 {
1508 .cmd = NFC_CMD_ENABLE_SE,
1509 .doit = nfc_genl_enable_se,
1510 .policy = nfc_genl_policy,
1511 },
1512 {
1513 .cmd = NFC_CMD_DISABLE_SE,
1514 .doit = nfc_genl_disable_se,
1515 .policy = nfc_genl_policy,
1516 },
1517 {
1518 .cmd = NFC_CMD_GET_SE,
1519 .dumpit = nfc_genl_dump_ses,
1520 .done = nfc_genl_dump_ses_done,
1521 .policy = nfc_genl_policy,
1522 },
1523 {
1524 .cmd = NFC_CMD_SE_IO,
1525 .doit = nfc_genl_se_io,
1526 .policy = nfc_genl_policy,
1527 },
1528 {
1529 .cmd = NFC_CMD_ACTIVATE_TARGET,
1530 .doit = nfc_genl_activate_target,
1531 .policy = nfc_genl_policy,
1532 },
1533 };
1534
1535
1536 struct urelease_work {
1537 struct work_struct w;
1538 int portid;
1539 };
1540
1541 static void nfc_urelease_event_work(struct work_struct *work)
1542 {
1543 struct urelease_work *w = container_of(work, struct urelease_work, w);
1544 struct class_dev_iter iter;
1545 struct nfc_dev *dev;
1546
1547 pr_debug("portid %d\n", w->portid);
1548
1549 mutex_lock(&nfc_devlist_mutex);
1550
1551 nfc_device_iter_init(&iter);
1552 dev = nfc_device_iter_next(&iter);
1553
1554 while (dev) {
1555 mutex_lock(&dev->genl_data.genl_data_mutex);
1556
1557 if (dev->genl_data.poll_req_portid == w->portid) {
1558 nfc_stop_poll(dev);
1559 dev->genl_data.poll_req_portid = 0;
1560 }
1561
1562 mutex_unlock(&dev->genl_data.genl_data_mutex);
1563
1564 dev = nfc_device_iter_next(&iter);
1565 }
1566
1567 nfc_device_iter_exit(&iter);
1568
1569 mutex_unlock(&nfc_devlist_mutex);
1570
1571 kfree(w);
1572 }
1573
1574 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1575 unsigned long event, void *ptr)
1576 {
1577 struct netlink_notify *n = ptr;
1578 struct urelease_work *w;
1579
1580 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1581 goto out;
1582
1583 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1584
1585 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1586 if (w) {
1587 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1588 w->portid = n->portid;
1589 schedule_work((struct work_struct *) w);
1590 }
1591
1592 out:
1593 return NOTIFY_DONE;
1594 }
1595
1596 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1597 {
1598 genl_data->poll_req_portid = 0;
1599 mutex_init(&genl_data->genl_data_mutex);
1600 }
1601
1602 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1603 {
1604 mutex_destroy(&genl_data->genl_data_mutex);
1605 }
1606
1607 static struct notifier_block nl_notifier = {
1608 .notifier_call = nfc_genl_rcv_nl_event,
1609 };
1610
1611 /**
1612 * nfc_genl_init() - Initialize netlink interface
1613 *
1614 * This initialization function registers the nfc netlink family.
1615 */
1616 int __init nfc_genl_init(void)
1617 {
1618 int rc;
1619
1620 rc = genl_register_family_with_ops_groups(&nfc_genl_family,
1621 nfc_genl_ops,
1622 nfc_genl_mcgrps);
1623 if (rc)
1624 return rc;
1625
1626 netlink_register_notifier(&nl_notifier);
1627
1628 return 0;
1629 }
1630
1631 /**
1632 * nfc_genl_exit() - Deinitialize netlink interface
1633 *
1634 * This exit function unregisters the nfc netlink family.
1635 */
1636 void nfc_genl_exit(void)
1637 {
1638 netlink_unregister_notifier(&nl_notifier);
1639 genl_unregister_family(&nfc_genl_family);
1640 }
Linux kernel - Deliverables
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