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
nfc_genl_send_target(struct sk_buff * msg,struct nfc_target * target,struct netlink_callback * cb,int flags)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
__get_device_from_cb(struct netlink_callback * cb)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
nfc_genl_dump_targets(struct sk_buff * skb,struct netlink_callback * cb)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
nfc_genl_dump_targets_done(struct netlink_callback * cb)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
nfc_genl_targets_found(struct nfc_dev * dev)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
nfc_genl_target_lost(struct nfc_dev * dev,u32 target_idx)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
nfc_genl_tm_activated(struct nfc_dev * dev,u32 protocol)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
nfc_genl_tm_deactivated(struct nfc_dev * dev)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
nfc_genl_device_added(struct nfc_dev * dev)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
nfc_genl_device_removed(struct nfc_dev * dev)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
nfc_genl_llc_send_sdres(struct nfc_dev * dev,struct hlist_head * sdres_list)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
nfc_genl_se_added(struct nfc_dev * dev,u32 se_idx,u16 type)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
nfc_genl_se_removed(struct nfc_dev * dev,u32 se_idx)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
nfc_genl_send_device(struct sk_buff * msg,struct nfc_dev * dev,u32 portid,u32 seq,struct netlink_callback * cb,int flags)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
nfc_genl_dump_devices(struct sk_buff * skb,struct netlink_callback * cb)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
nfc_genl_dump_devices_done(struct netlink_callback * cb)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
nfc_genl_dep_link_up_event(struct nfc_dev * dev,u32 target_idx,u8 comm_mode,u8 rf_mode)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
nfc_genl_dep_link_down_event(struct nfc_dev * dev)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
nfc_genl_get_device(struct sk_buff * skb,struct genl_info * info)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
nfc_genl_dev_up(struct sk_buff * skb,struct genl_info * info)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
nfc_genl_dev_down(struct sk_buff * skb,struct genl_info * info)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
nfc_genl_start_poll(struct sk_buff * skb,struct genl_info * info)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
nfc_genl_stop_poll(struct sk_buff * skb,struct genl_info * info)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
nfc_genl_dep_link_up(struct sk_buff * skb,struct genl_info * info)813 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
814 {
815 struct nfc_dev *dev;
816 int rc, tgt_idx;
817 u32 idx;
818 u8 comm;
819
820 pr_debug("DEP link up\n");
821
822 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
823 !info->attrs[NFC_ATTR_COMM_MODE])
824 return -EINVAL;
825
826 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
827 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
828 tgt_idx = NFC_TARGET_IDX_ANY;
829 else
830 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
831
832 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
833
834 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
835 return -EINVAL;
836
837 dev = nfc_get_device(idx);
838 if (!dev)
839 return -ENODEV;
840
841 rc = nfc_dep_link_up(dev, tgt_idx, comm);
842
843 nfc_put_device(dev);
844
845 return rc;
846 }
847
nfc_genl_dep_link_down(struct sk_buff * skb,struct genl_info * info)848 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
849 {
850 struct nfc_dev *dev;
851 int rc;
852 u32 idx;
853
854 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
855 return -EINVAL;
856
857 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
858
859 dev = nfc_get_device(idx);
860 if (!dev)
861 return -ENODEV;
862
863 rc = nfc_dep_link_down(dev);
864
865 nfc_put_device(dev);
866 return rc;
867 }
868
nfc_genl_send_params(struct sk_buff * msg,struct nfc_llcp_local * local,u32 portid,u32 seq)869 static int nfc_genl_send_params(struct sk_buff *msg,
870 struct nfc_llcp_local *local,
871 u32 portid, u32 seq)
872 {
873 void *hdr;
874
875 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
876 NFC_CMD_LLC_GET_PARAMS);
877 if (!hdr)
878 return -EMSGSIZE;
879
880 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
881 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
882 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
883 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
884 goto nla_put_failure;
885
886 return genlmsg_end(msg, hdr);
887
888 nla_put_failure:
889
890 genlmsg_cancel(msg, hdr);
891 return -EMSGSIZE;
892 }
893
nfc_genl_llc_get_params(struct sk_buff * skb,struct genl_info * info)894 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
895 {
896 struct nfc_dev *dev;
897 struct nfc_llcp_local *local;
898 int rc = 0;
899 struct sk_buff *msg = NULL;
900 u32 idx;
901
902 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
903 !info->attrs[NFC_ATTR_TARGET_INDEX] ||
904 !info->attrs[NFC_ATTR_PROTOCOLS])
905 return -EINVAL;
906
907 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
908
909 dev = nfc_get_device(idx);
910 if (!dev)
911 return -ENODEV;
912
913 device_lock(&dev->dev);
914
915 local = nfc_llcp_find_local(dev);
916 if (!local) {
917 rc = -ENODEV;
918 goto exit;
919 }
920
921 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
922 if (!msg) {
923 rc = -ENOMEM;
924 goto exit;
925 }
926
927 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
928
929 exit:
930 device_unlock(&dev->dev);
931
932 nfc_put_device(dev);
933
934 if (rc < 0) {
935 if (msg)
936 nlmsg_free(msg);
937
938 return rc;
939 }
940
941 return genlmsg_reply(msg, info);
942 }
943
nfc_genl_llc_set_params(struct sk_buff * skb,struct genl_info * info)944 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
945 {
946 struct nfc_dev *dev;
947 struct nfc_llcp_local *local;
948 u8 rw = 0;
949 u16 miux = 0;
950 u32 idx;
951 int rc = 0;
952
953 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
954 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
955 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
956 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
957 return -EINVAL;
958
959 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
960 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
961
962 if (rw > LLCP_MAX_RW)
963 return -EINVAL;
964 }
965
966 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
967 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
968
969 if (miux > LLCP_MAX_MIUX)
970 return -EINVAL;
971 }
972
973 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
974
975 dev = nfc_get_device(idx);
976 if (!dev)
977 return -ENODEV;
978
979 device_lock(&dev->dev);
980
981 local = nfc_llcp_find_local(dev);
982 if (!local) {
983 nfc_put_device(dev);
984 rc = -ENODEV;
985 goto exit;
986 }
987
988 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
989 if (dev->dep_link_up) {
990 rc = -EINPROGRESS;
991 goto exit;
992 }
993
994 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
995 }
996
997 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
998 local->rw = rw;
999
1000 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1001 local->miux = cpu_to_be16(miux);
1002
1003 exit:
1004 device_unlock(&dev->dev);
1005
1006 nfc_put_device(dev);
1007
1008 return rc;
1009 }
1010
nfc_genl_llc_sdreq(struct sk_buff * skb,struct genl_info * info)1011 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1012 {
1013 struct nfc_dev *dev;
1014 struct nfc_llcp_local *local;
1015 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1016 u32 idx;
1017 u8 tid;
1018 char *uri;
1019 int rc = 0, rem;
1020 size_t uri_len, tlvs_len;
1021 struct hlist_head sdreq_list;
1022 struct nfc_llcp_sdp_tlv *sdreq;
1023
1024 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1025 !info->attrs[NFC_ATTR_LLC_SDP])
1026 return -EINVAL;
1027
1028 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1029
1030 dev = nfc_get_device(idx);
1031 if (!dev) {
1032 rc = -ENODEV;
1033 goto exit;
1034 }
1035
1036 device_lock(&dev->dev);
1037
1038 if (dev->dep_link_up == false) {
1039 rc = -ENOLINK;
1040 goto exit;
1041 }
1042
1043 local = nfc_llcp_find_local(dev);
1044 if (!local) {
1045 nfc_put_device(dev);
1046 rc = -ENODEV;
1047 goto exit;
1048 }
1049
1050 INIT_HLIST_HEAD(&sdreq_list);
1051
1052 tlvs_len = 0;
1053
1054 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1055 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
1056 nfc_sdp_genl_policy);
1057
1058 if (rc != 0) {
1059 rc = -EINVAL;
1060 goto exit;
1061 }
1062
1063 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1064 continue;
1065
1066 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1067 if (uri_len == 0)
1068 continue;
1069
1070 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1071 if (uri == NULL || *uri == 0)
1072 continue;
1073
1074 tid = local->sdreq_next_tid++;
1075
1076 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1077 if (sdreq == NULL) {
1078 rc = -ENOMEM;
1079 goto exit;
1080 }
1081
1082 tlvs_len += sdreq->tlv_len;
1083
1084 hlist_add_head(&sdreq->node, &sdreq_list);
1085 }
1086
1087 if (hlist_empty(&sdreq_list)) {
1088 rc = -EINVAL;
1089 goto exit;
1090 }
1091
1092 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1093 exit:
1094 device_unlock(&dev->dev);
1095
1096 nfc_put_device(dev);
1097
1098 return rc;
1099 }
1100
nfc_genl_fw_download(struct sk_buff * skb,struct genl_info * info)1101 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1102 {
1103 struct nfc_dev *dev;
1104 int rc;
1105 u32 idx;
1106 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1107
1108 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1109 return -EINVAL;
1110
1111 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1112
1113 dev = nfc_get_device(idx);
1114 if (!dev)
1115 return -ENODEV;
1116
1117 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1118 sizeof(firmware_name));
1119
1120 rc = nfc_fw_download(dev, firmware_name);
1121
1122 nfc_put_device(dev);
1123 return rc;
1124 }
1125
nfc_genl_fw_download_done(struct nfc_dev * dev,const char * firmware_name,u32 result)1126 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1127 u32 result)
1128 {
1129 struct sk_buff *msg;
1130 void *hdr;
1131
1132 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1133 if (!msg)
1134 return -ENOMEM;
1135
1136 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1137 NFC_CMD_FW_DOWNLOAD);
1138 if (!hdr)
1139 goto free_msg;
1140
1141 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1142 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1143 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1144 goto nla_put_failure;
1145
1146 genlmsg_end(msg, hdr);
1147
1148 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1149
1150 return 0;
1151
1152 nla_put_failure:
1153 genlmsg_cancel(msg, hdr);
1154 free_msg:
1155 nlmsg_free(msg);
1156 return -EMSGSIZE;
1157 }
1158
nfc_genl_enable_se(struct sk_buff * skb,struct genl_info * info)1159 static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1160 {
1161 struct nfc_dev *dev;
1162 int rc;
1163 u32 idx, se_idx;
1164
1165 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1166 !info->attrs[NFC_ATTR_SE_INDEX])
1167 return -EINVAL;
1168
1169 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1170 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1171
1172 dev = nfc_get_device(idx);
1173 if (!dev)
1174 return -ENODEV;
1175
1176 rc = nfc_enable_se(dev, se_idx);
1177
1178 nfc_put_device(dev);
1179 return rc;
1180 }
1181
nfc_genl_disable_se(struct sk_buff * skb,struct genl_info * info)1182 static int nfc_genl_disable_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_disable_se(dev, se_idx);
1200
1201 nfc_put_device(dev);
1202 return rc;
1203 }
1204
nfc_genl_send_se(struct sk_buff * msg,struct nfc_dev * dev,u32 portid,u32 seq,struct netlink_callback * cb,int flags)1205 static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1206 u32 portid, u32 seq,
1207 struct netlink_callback *cb,
1208 int flags)
1209 {
1210 void *hdr;
1211 struct nfc_se *se, *n;
1212
1213 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1214 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1215 NFC_CMD_GET_SE);
1216 if (!hdr)
1217 goto nla_put_failure;
1218
1219 if (cb)
1220 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
1221
1222 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1223 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1224 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1225 goto nla_put_failure;
1226
1227 if (genlmsg_end(msg, hdr) < 0)
1228 goto nla_put_failure;
1229 }
1230
1231 return 0;
1232
1233 nla_put_failure:
1234 genlmsg_cancel(msg, hdr);
1235 return -EMSGSIZE;
1236 }
1237
nfc_genl_dump_ses(struct sk_buff * skb,struct netlink_callback * cb)1238 static int nfc_genl_dump_ses(struct sk_buff *skb,
1239 struct netlink_callback *cb)
1240 {
1241 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1242 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1243 bool first_call = false;
1244
1245 if (!iter) {
1246 first_call = true;
1247 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1248 if (!iter)
1249 return -ENOMEM;
1250 cb->args[0] = (long) iter;
1251 }
1252
1253 mutex_lock(&nfc_devlist_mutex);
1254
1255 cb->seq = nfc_devlist_generation;
1256
1257 if (first_call) {
1258 nfc_device_iter_init(iter);
1259 dev = nfc_device_iter_next(iter);
1260 }
1261
1262 while (dev) {
1263 int rc;
1264
1265 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1266 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1267 if (rc < 0)
1268 break;
1269
1270 dev = nfc_device_iter_next(iter);
1271 }
1272
1273 mutex_unlock(&nfc_devlist_mutex);
1274
1275 cb->args[1] = (long) dev;
1276
1277 return skb->len;
1278 }
1279
nfc_genl_dump_ses_done(struct netlink_callback * cb)1280 static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1281 {
1282 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1283
1284 nfc_device_iter_exit(iter);
1285 kfree(iter);
1286
1287 return 0;
1288 }
1289
1290 struct se_io_ctx {
1291 u32 dev_idx;
1292 u32 se_idx;
1293 };
1294
se_io_cb(void * context,u8 * apdu,size_t apdu_len,int err)1295 static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1296 {
1297 struct se_io_ctx *ctx = context;
1298 struct sk_buff *msg;
1299 void *hdr;
1300
1301 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1302 if (!msg) {
1303 kfree(ctx);
1304 return;
1305 }
1306
1307 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1308 NFC_CMD_SE_IO);
1309 if (!hdr)
1310 goto free_msg;
1311
1312 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1313 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1314 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1315 goto nla_put_failure;
1316
1317 genlmsg_end(msg, hdr);
1318
1319 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1320
1321 kfree(ctx);
1322
1323 return;
1324
1325 nla_put_failure:
1326 genlmsg_cancel(msg, hdr);
1327 free_msg:
1328 nlmsg_free(msg);
1329 kfree(ctx);
1330
1331 return;
1332 }
1333
nfc_genl_se_io(struct sk_buff * skb,struct genl_info * info)1334 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1335 {
1336 struct nfc_dev *dev;
1337 struct se_io_ctx *ctx;
1338 u32 dev_idx, se_idx;
1339 u8 *apdu;
1340 size_t apdu_len;
1341
1342 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1343 !info->attrs[NFC_ATTR_SE_INDEX] ||
1344 !info->attrs[NFC_ATTR_SE_APDU])
1345 return -EINVAL;
1346
1347 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1348 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1349
1350 dev = nfc_get_device(dev_idx);
1351 if (!dev)
1352 return -ENODEV;
1353
1354 if (!dev->ops || !dev->ops->se_io)
1355 return -ENOTSUPP;
1356
1357 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1358 if (apdu_len == 0)
1359 return -EINVAL;
1360
1361 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1362 if (!apdu)
1363 return -EINVAL;
1364
1365 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1366 if (!ctx)
1367 return -ENOMEM;
1368
1369 ctx->dev_idx = dev_idx;
1370 ctx->se_idx = se_idx;
1371
1372 return dev->ops->se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1373 }
1374
1375 static const struct genl_ops nfc_genl_ops[] = {
1376 {
1377 .cmd = NFC_CMD_GET_DEVICE,
1378 .doit = nfc_genl_get_device,
1379 .dumpit = nfc_genl_dump_devices,
1380 .done = nfc_genl_dump_devices_done,
1381 .policy = nfc_genl_policy,
1382 },
1383 {
1384 .cmd = NFC_CMD_DEV_UP,
1385 .doit = nfc_genl_dev_up,
1386 .policy = nfc_genl_policy,
1387 },
1388 {
1389 .cmd = NFC_CMD_DEV_DOWN,
1390 .doit = nfc_genl_dev_down,
1391 .policy = nfc_genl_policy,
1392 },
1393 {
1394 .cmd = NFC_CMD_START_POLL,
1395 .doit = nfc_genl_start_poll,
1396 .policy = nfc_genl_policy,
1397 },
1398 {
1399 .cmd = NFC_CMD_STOP_POLL,
1400 .doit = nfc_genl_stop_poll,
1401 .policy = nfc_genl_policy,
1402 },
1403 {
1404 .cmd = NFC_CMD_DEP_LINK_UP,
1405 .doit = nfc_genl_dep_link_up,
1406 .policy = nfc_genl_policy,
1407 },
1408 {
1409 .cmd = NFC_CMD_DEP_LINK_DOWN,
1410 .doit = nfc_genl_dep_link_down,
1411 .policy = nfc_genl_policy,
1412 },
1413 {
1414 .cmd = NFC_CMD_GET_TARGET,
1415 .dumpit = nfc_genl_dump_targets,
1416 .done = nfc_genl_dump_targets_done,
1417 .policy = nfc_genl_policy,
1418 },
1419 {
1420 .cmd = NFC_CMD_LLC_GET_PARAMS,
1421 .doit = nfc_genl_llc_get_params,
1422 .policy = nfc_genl_policy,
1423 },
1424 {
1425 .cmd = NFC_CMD_LLC_SET_PARAMS,
1426 .doit = nfc_genl_llc_set_params,
1427 .policy = nfc_genl_policy,
1428 },
1429 {
1430 .cmd = NFC_CMD_LLC_SDREQ,
1431 .doit = nfc_genl_llc_sdreq,
1432 .policy = nfc_genl_policy,
1433 },
1434 {
1435 .cmd = NFC_CMD_FW_DOWNLOAD,
1436 .doit = nfc_genl_fw_download,
1437 .policy = nfc_genl_policy,
1438 },
1439 {
1440 .cmd = NFC_CMD_ENABLE_SE,
1441 .doit = nfc_genl_enable_se,
1442 .policy = nfc_genl_policy,
1443 },
1444 {
1445 .cmd = NFC_CMD_DISABLE_SE,
1446 .doit = nfc_genl_disable_se,
1447 .policy = nfc_genl_policy,
1448 },
1449 {
1450 .cmd = NFC_CMD_GET_SE,
1451 .dumpit = nfc_genl_dump_ses,
1452 .done = nfc_genl_dump_ses_done,
1453 .policy = nfc_genl_policy,
1454 },
1455 {
1456 .cmd = NFC_CMD_SE_IO,
1457 .doit = nfc_genl_se_io,
1458 .policy = nfc_genl_policy,
1459 },
1460 };
1461
1462
1463 struct urelease_work {
1464 struct work_struct w;
1465 int portid;
1466 };
1467
nfc_urelease_event_work(struct work_struct * work)1468 static void nfc_urelease_event_work(struct work_struct *work)
1469 {
1470 struct urelease_work *w = container_of(work, struct urelease_work, w);
1471 struct class_dev_iter iter;
1472 struct nfc_dev *dev;
1473
1474 pr_debug("portid %d\n", w->portid);
1475
1476 mutex_lock(&nfc_devlist_mutex);
1477
1478 nfc_device_iter_init(&iter);
1479 dev = nfc_device_iter_next(&iter);
1480
1481 while (dev) {
1482 mutex_lock(&dev->genl_data.genl_data_mutex);
1483
1484 if (dev->genl_data.poll_req_portid == w->portid) {
1485 nfc_stop_poll(dev);
1486 dev->genl_data.poll_req_portid = 0;
1487 }
1488
1489 mutex_unlock(&dev->genl_data.genl_data_mutex);
1490
1491 dev = nfc_device_iter_next(&iter);
1492 }
1493
1494 nfc_device_iter_exit(&iter);
1495
1496 mutex_unlock(&nfc_devlist_mutex);
1497
1498 kfree(w);
1499 }
1500
nfc_genl_rcv_nl_event(struct notifier_block * this,unsigned long event,void * ptr)1501 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1502 unsigned long event, void *ptr)
1503 {
1504 struct netlink_notify *n = ptr;
1505 struct urelease_work *w;
1506
1507 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1508 goto out;
1509
1510 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1511
1512 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1513 if (w) {
1514 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1515 w->portid = n->portid;
1516 schedule_work((struct work_struct *) w);
1517 }
1518
1519 out:
1520 return NOTIFY_DONE;
1521 }
1522
nfc_genl_data_init(struct nfc_genl_data * genl_data)1523 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1524 {
1525 genl_data->poll_req_portid = 0;
1526 mutex_init(&genl_data->genl_data_mutex);
1527 }
1528
nfc_genl_data_exit(struct nfc_genl_data * genl_data)1529 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1530 {
1531 mutex_destroy(&genl_data->genl_data_mutex);
1532 }
1533
1534 static struct notifier_block nl_notifier = {
1535 .notifier_call = nfc_genl_rcv_nl_event,
1536 };
1537
1538 /**
1539 * nfc_genl_init() - Initialize netlink interface
1540 *
1541 * This initialization function registers the nfc netlink family.
1542 */
nfc_genl_init(void)1543 int __init nfc_genl_init(void)
1544 {
1545 int rc;
1546
1547 rc = genl_register_family_with_ops_groups(&nfc_genl_family,
1548 nfc_genl_ops,
1549 nfc_genl_mcgrps);
1550 if (rc)
1551 return rc;
1552
1553 netlink_register_notifier(&nl_notifier);
1554
1555 return 0;
1556 }
1557
1558 /**
1559 * nfc_genl_exit() - Deinitialize netlink interface
1560 *
1561 * This exit function unregisters the nfc netlink family.
1562 */
nfc_genl_exit(void)1563 void nfc_genl_exit(void)
1564 {
1565 netlink_unregister_notifier(&nl_notifier);
1566 genl_unregister_family(&nfc_genl_family);
1567 }
1568