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16#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
17
18#include <net/genetlink.h>
19#include <linux/nfc.h>
20#include <linux/slab.h>
21
22#include "nfc.h"
23#include "llcp.h"
24
25static const struct genl_multicast_group nfc_genl_mcgrps[] = {
26 { .name = NFC_GENL_MCAST_EVENT_NAME, },
27};
28
29static struct genl_family nfc_genl_family;
30static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
31 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
32 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
33 .len = NFC_DEVICE_NAME_MAXSIZE },
34 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
35 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
36 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
37 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
38 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
39 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
40 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
41 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
42 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
43 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
44 [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
45 .len = NFC_FIRMWARE_NAME_MAXSIZE },
46 [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
47 [NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
48
49};
50
51static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
52 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING,
53 .len = U8_MAX - 4 },
54 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
55};
56
57static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
58 struct netlink_callback *cb, int flags)
59{
60 void *hdr;
61
62 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
63 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
64 if (!hdr)
65 return -EMSGSIZE;
66
67 genl_dump_check_consistent(cb, hdr);
68
69 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
70 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
71 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
72 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
73 goto nla_put_failure;
74 if (target->nfcid1_len > 0 &&
75 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
76 target->nfcid1))
77 goto nla_put_failure;
78 if (target->sensb_res_len > 0 &&
79 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
80 target->sensb_res))
81 goto nla_put_failure;
82 if (target->sensf_res_len > 0 &&
83 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
84 target->sensf_res))
85 goto nla_put_failure;
86
87 if (target->is_iso15693) {
88 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
89 target->iso15693_dsfid) ||
90 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
91 sizeof(target->iso15693_uid), target->iso15693_uid))
92 goto nla_put_failure;
93 }
94
95 genlmsg_end(msg, hdr);
96 return 0;
97
98nla_put_failure:
99 genlmsg_cancel(msg, hdr);
100 return -EMSGSIZE;
101}
102
103static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
104{
105 struct nlattr **attrbuf = genl_family_attrbuf(&nfc_genl_family);
106 struct nfc_dev *dev;
107 int rc;
108 u32 idx;
109
110 rc = nlmsg_parse_deprecated(cb->nlh,
111 GENL_HDRLEN + nfc_genl_family.hdrsize,
112 attrbuf, nfc_genl_family.maxattr,
113 nfc_genl_policy, NULL);
114 if (rc < 0)
115 return ERR_PTR(rc);
116
117 if (!attrbuf[NFC_ATTR_DEVICE_INDEX])
118 return ERR_PTR(-EINVAL);
119
120 idx = nla_get_u32(attrbuf[NFC_ATTR_DEVICE_INDEX]);
121
122 dev = nfc_get_device(idx);
123 if (!dev)
124 return ERR_PTR(-ENODEV);
125
126 return dev;
127}
128
129static int nfc_genl_dump_targets(struct sk_buff *skb,
130 struct netlink_callback *cb)
131{
132 int i = cb->args[0];
133 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
134 int rc;
135
136 if (!dev) {
137 dev = __get_device_from_cb(cb);
138 if (IS_ERR(dev))
139 return PTR_ERR(dev);
140
141 cb->args[1] = (long) dev;
142 }
143
144 device_lock(&dev->dev);
145
146 cb->seq = dev->targets_generation;
147
148 while (i < dev->n_targets) {
149 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
150 NLM_F_MULTI);
151 if (rc < 0)
152 break;
153
154 i++;
155 }
156
157 device_unlock(&dev->dev);
158
159 cb->args[0] = i;
160
161 return skb->len;
162}
163
164static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
165{
166 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
167
168 if (dev)
169 nfc_put_device(dev);
170
171 return 0;
172}
173
174int nfc_genl_targets_found(struct nfc_dev *dev)
175{
176 struct sk_buff *msg;
177 void *hdr;
178
179 dev->genl_data.poll_req_portid = 0;
180
181 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
182 if (!msg)
183 return -ENOMEM;
184
185 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
186 NFC_EVENT_TARGETS_FOUND);
187 if (!hdr)
188 goto free_msg;
189
190 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
191 goto nla_put_failure;
192
193 genlmsg_end(msg, hdr);
194
195 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
196
197nla_put_failure:
198free_msg:
199 nlmsg_free(msg);
200 return -EMSGSIZE;
201}
202
203int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
204{
205 struct sk_buff *msg;
206 void *hdr;
207
208 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
209 if (!msg)
210 return -ENOMEM;
211
212 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
213 NFC_EVENT_TARGET_LOST);
214 if (!hdr)
215 goto free_msg;
216
217 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
218 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
219 goto nla_put_failure;
220
221 genlmsg_end(msg, hdr);
222
223 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
224
225 return 0;
226
227nla_put_failure:
228free_msg:
229 nlmsg_free(msg);
230 return -EMSGSIZE;
231}
232
233int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
234{
235 struct sk_buff *msg;
236 void *hdr;
237
238 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
239 if (!msg)
240 return -ENOMEM;
241
242 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
243 NFC_EVENT_TM_ACTIVATED);
244 if (!hdr)
245 goto free_msg;
246
247 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
248 goto nla_put_failure;
249 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
250 goto nla_put_failure;
251
252 genlmsg_end(msg, hdr);
253
254 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
255
256 return 0;
257
258nla_put_failure:
259free_msg:
260 nlmsg_free(msg);
261 return -EMSGSIZE;
262}
263
264int nfc_genl_tm_deactivated(struct nfc_dev *dev)
265{
266 struct sk_buff *msg;
267 void *hdr;
268
269 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
270 if (!msg)
271 return -ENOMEM;
272
273 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
274 NFC_EVENT_TM_DEACTIVATED);
275 if (!hdr)
276 goto free_msg;
277
278 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
279 goto nla_put_failure;
280
281 genlmsg_end(msg, hdr);
282
283 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
284
285 return 0;
286
287nla_put_failure:
288free_msg:
289 nlmsg_free(msg);
290 return -EMSGSIZE;
291}
292
293static int nfc_genl_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg)
294{
295 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
296 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
297 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
298 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
299 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
300 return -1;
301 return 0;
302}
303
304int nfc_genl_device_added(struct nfc_dev *dev)
305{
306 struct sk_buff *msg;
307 void *hdr;
308
309 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
310 if (!msg)
311 return -ENOMEM;
312
313 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
314 NFC_EVENT_DEVICE_ADDED);
315 if (!hdr)
316 goto free_msg;
317
318 if (nfc_genl_setup_device_added(dev, msg))
319 goto nla_put_failure;
320
321 genlmsg_end(msg, hdr);
322
323 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
324
325 return 0;
326
327nla_put_failure:
328free_msg:
329 nlmsg_free(msg);
330 return -EMSGSIZE;
331}
332
333int nfc_genl_device_removed(struct nfc_dev *dev)
334{
335 struct sk_buff *msg;
336 void *hdr;
337
338 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
339 if (!msg)
340 return -ENOMEM;
341
342 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
343 NFC_EVENT_DEVICE_REMOVED);
344 if (!hdr)
345 goto free_msg;
346
347 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
348 goto nla_put_failure;
349
350 genlmsg_end(msg, hdr);
351
352 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
353
354 return 0;
355
356nla_put_failure:
357free_msg:
358 nlmsg_free(msg);
359 return -EMSGSIZE;
360}
361
362int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
363{
364 struct sk_buff *msg;
365 struct nlattr *sdp_attr, *uri_attr;
366 struct nfc_llcp_sdp_tlv *sdres;
367 struct hlist_node *n;
368 void *hdr;
369 int rc = -EMSGSIZE;
370 int i;
371
372 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
373 if (!msg)
374 return -ENOMEM;
375
376 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
377 NFC_EVENT_LLC_SDRES);
378 if (!hdr)
379 goto free_msg;
380
381 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
382 goto nla_put_failure;
383
384 sdp_attr = nla_nest_start_noflag(msg, NFC_ATTR_LLC_SDP);
385 if (sdp_attr == NULL) {
386 rc = -ENOMEM;
387 goto nla_put_failure;
388 }
389
390 i = 1;
391 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
392 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
393
394 uri_attr = nla_nest_start_noflag(msg, i++);
395 if (uri_attr == NULL) {
396 rc = -ENOMEM;
397 goto nla_put_failure;
398 }
399
400 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
401 goto nla_put_failure;
402
403 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
404 goto nla_put_failure;
405
406 nla_nest_end(msg, uri_attr);
407
408 hlist_del(&sdres->node);
409
410 nfc_llcp_free_sdp_tlv(sdres);
411 }
412
413 nla_nest_end(msg, sdp_attr);
414
415 genlmsg_end(msg, hdr);
416
417 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
418
419nla_put_failure:
420free_msg:
421 nlmsg_free(msg);
422
423 nfc_llcp_free_sdp_tlv_list(sdres_list);
424
425 return rc;
426}
427
428int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
429{
430 struct sk_buff *msg;
431 void *hdr;
432
433 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
434 if (!msg)
435 return -ENOMEM;
436
437 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
438 NFC_EVENT_SE_ADDED);
439 if (!hdr)
440 goto free_msg;
441
442 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
443 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
444 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
445 goto nla_put_failure;
446
447 genlmsg_end(msg, hdr);
448
449 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
450
451 return 0;
452
453nla_put_failure:
454free_msg:
455 nlmsg_free(msg);
456 return -EMSGSIZE;
457}
458
459int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
460{
461 struct sk_buff *msg;
462 void *hdr;
463
464 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
465 if (!msg)
466 return -ENOMEM;
467
468 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
469 NFC_EVENT_SE_REMOVED);
470 if (!hdr)
471 goto free_msg;
472
473 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
474 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
475 goto nla_put_failure;
476
477 genlmsg_end(msg, hdr);
478
479 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
480
481 return 0;
482
483nla_put_failure:
484free_msg:
485 nlmsg_free(msg);
486 return -EMSGSIZE;
487}
488
489int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
490 struct nfc_evt_transaction *evt_transaction)
491{
492 struct nfc_se *se;
493 struct sk_buff *msg;
494 void *hdr;
495
496 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
497 if (!msg)
498 return -ENOMEM;
499
500 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
501 NFC_EVENT_SE_TRANSACTION);
502 if (!hdr)
503 goto free_msg;
504
505 se = nfc_find_se(dev, se_idx);
506 if (!se)
507 goto free_msg;
508
509 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
510 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
511 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
512 nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
513 evt_transaction->aid) ||
514 nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
515 evt_transaction->params))
516 goto nla_put_failure;
517
518
519 devm_kfree(&dev->dev, evt_transaction);
520
521 genlmsg_end(msg, hdr);
522
523 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
524
525 return 0;
526
527nla_put_failure:
528free_msg:
529
530 devm_kfree(&dev->dev, evt_transaction);
531 nlmsg_free(msg);
532 return -EMSGSIZE;
533}
534
535int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
536{
537 struct nfc_se *se;
538 struct sk_buff *msg;
539 void *hdr;
540
541 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
542 if (!msg)
543 return -ENOMEM;
544
545 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
546 NFC_EVENT_SE_CONNECTIVITY);
547 if (!hdr)
548 goto free_msg;
549
550 se = nfc_find_se(dev, se_idx);
551 if (!se)
552 goto free_msg;
553
554 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
555 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
556 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
557 goto nla_put_failure;
558
559 genlmsg_end(msg, hdr);
560
561 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
562
563 return 0;
564
565nla_put_failure:
566free_msg:
567 nlmsg_free(msg);
568 return -EMSGSIZE;
569}
570
571static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
572 u32 portid, u32 seq,
573 struct netlink_callback *cb,
574 int flags)
575{
576 void *hdr;
577
578 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
579 NFC_CMD_GET_DEVICE);
580 if (!hdr)
581 return -EMSGSIZE;
582
583 if (cb)
584 genl_dump_check_consistent(cb, hdr);
585
586 if (nfc_genl_setup_device_added(dev, msg))
587 goto nla_put_failure;
588
589 genlmsg_end(msg, hdr);
590 return 0;
591
592nla_put_failure:
593 genlmsg_cancel(msg, hdr);
594 return -EMSGSIZE;
595}
596
597static int nfc_genl_dump_devices(struct sk_buff *skb,
598 struct netlink_callback *cb)
599{
600 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
601 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
602 bool first_call = false;
603
604 if (!iter) {
605 first_call = true;
606 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
607 if (!iter)
608 return -ENOMEM;
609 cb->args[0] = (long) iter;
610 }
611
612 mutex_lock(&nfc_devlist_mutex);
613
614 cb->seq = nfc_devlist_generation;
615
616 if (first_call) {
617 nfc_device_iter_init(iter);
618 dev = nfc_device_iter_next(iter);
619 }
620
621 while (dev) {
622 int rc;
623
624 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
625 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
626 if (rc < 0)
627 break;
628
629 dev = nfc_device_iter_next(iter);
630 }
631
632 mutex_unlock(&nfc_devlist_mutex);
633
634 cb->args[1] = (long) dev;
635
636 return skb->len;
637}
638
639static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
640{
641 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
642
643 nfc_device_iter_exit(iter);
644 kfree(iter);
645
646 return 0;
647}
648
649int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
650 u8 comm_mode, u8 rf_mode)
651{
652 struct sk_buff *msg;
653 void *hdr;
654
655 pr_debug("DEP link is up\n");
656
657 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
658 if (!msg)
659 return -ENOMEM;
660
661 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
662 if (!hdr)
663 goto free_msg;
664
665 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
666 goto nla_put_failure;
667 if (rf_mode == NFC_RF_INITIATOR &&
668 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
669 goto nla_put_failure;
670 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
671 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
672 goto nla_put_failure;
673
674 genlmsg_end(msg, hdr);
675
676 dev->dep_link_up = true;
677
678 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
679
680 return 0;
681
682nla_put_failure:
683free_msg:
684 nlmsg_free(msg);
685 return -EMSGSIZE;
686}
687
688int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
689{
690 struct sk_buff *msg;
691 void *hdr;
692
693 pr_debug("DEP link is down\n");
694
695 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
696 if (!msg)
697 return -ENOMEM;
698
699 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
700 NFC_CMD_DEP_LINK_DOWN);
701 if (!hdr)
702 goto free_msg;
703
704 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
705 goto nla_put_failure;
706
707 genlmsg_end(msg, hdr);
708
709 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
710
711 return 0;
712
713nla_put_failure:
714free_msg:
715 nlmsg_free(msg);
716 return -EMSGSIZE;
717}
718
719static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
720{
721 struct sk_buff *msg;
722 struct nfc_dev *dev;
723 u32 idx;
724 int rc = -ENOBUFS;
725
726 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
727 return -EINVAL;
728
729 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
730
731 dev = nfc_get_device(idx);
732 if (!dev)
733 return -ENODEV;
734
735 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
736 if (!msg) {
737 rc = -ENOMEM;
738 goto out_putdev;
739 }
740
741 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
742 NULL, 0);
743 if (rc < 0)
744 goto out_free;
745
746 nfc_put_device(dev);
747
748 return genlmsg_reply(msg, info);
749
750out_free:
751 nlmsg_free(msg);
752out_putdev:
753 nfc_put_device(dev);
754 return rc;
755}
756
757static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
758{
759 struct nfc_dev *dev;
760 int rc;
761 u32 idx;
762
763 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
764 return -EINVAL;
765
766 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
767
768 dev = nfc_get_device(idx);
769 if (!dev)
770 return -ENODEV;
771
772 rc = nfc_dev_up(dev);
773
774 nfc_put_device(dev);
775 return rc;
776}
777
778static int nfc_genl_dev_down(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 rc = nfc_dev_down(dev);
794
795 nfc_put_device(dev);
796 return rc;
797}
798
799static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
800{
801 struct nfc_dev *dev;
802 int rc;
803 u32 idx;
804 u32 im_protocols = 0, tm_protocols = 0;
805
806 pr_debug("Poll start\n");
807
808 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
809 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
810 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
811 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
812 return -EINVAL;
813
814 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
815
816 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
817 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
818
819 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
820 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
821 else if (info->attrs[NFC_ATTR_PROTOCOLS])
822 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
823
824 dev = nfc_get_device(idx);
825 if (!dev)
826 return -ENODEV;
827
828 mutex_lock(&dev->genl_data.genl_data_mutex);
829
830 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
831 if (!rc)
832 dev->genl_data.poll_req_portid = info->snd_portid;
833
834 mutex_unlock(&dev->genl_data.genl_data_mutex);
835
836 nfc_put_device(dev);
837 return rc;
838}
839
840static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
841{
842 struct nfc_dev *dev;
843 int rc;
844 u32 idx;
845
846 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
847 return -EINVAL;
848
849 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
850
851 dev = nfc_get_device(idx);
852 if (!dev)
853 return -ENODEV;
854
855 device_lock(&dev->dev);
856
857 if (!dev->polling) {
858 device_unlock(&dev->dev);
859 return -EINVAL;
860 }
861
862 device_unlock(&dev->dev);
863
864 mutex_lock(&dev->genl_data.genl_data_mutex);
865
866 if (dev->genl_data.poll_req_portid != info->snd_portid) {
867 rc = -EBUSY;
868 goto out;
869 }
870
871 rc = nfc_stop_poll(dev);
872 dev->genl_data.poll_req_portid = 0;
873
874out:
875 mutex_unlock(&dev->genl_data.genl_data_mutex);
876 nfc_put_device(dev);
877 return rc;
878}
879
880static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
881{
882 struct nfc_dev *dev;
883 u32 device_idx, target_idx, protocol;
884 int rc;
885
886 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
887 !info->attrs[NFC_ATTR_TARGET_INDEX] ||
888 !info->attrs[NFC_ATTR_PROTOCOLS])
889 return -EINVAL;
890
891 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
892
893 dev = nfc_get_device(device_idx);
894 if (!dev)
895 return -ENODEV;
896
897 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
898 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
899
900 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
901 rc = nfc_activate_target(dev, target_idx, protocol);
902
903 nfc_put_device(dev);
904 return rc;
905}
906
907static int nfc_genl_deactivate_target(struct sk_buff *skb,
908 struct genl_info *info)
909{
910 struct nfc_dev *dev;
911 u32 device_idx, target_idx;
912 int rc;
913
914 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
915 !info->attrs[NFC_ATTR_TARGET_INDEX])
916 return -EINVAL;
917
918 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
919
920 dev = nfc_get_device(device_idx);
921 if (!dev)
922 return -ENODEV;
923
924 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
925
926 rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
927
928 nfc_put_device(dev);
929 return rc;
930}
931
932static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
933{
934 struct nfc_dev *dev;
935 int rc, tgt_idx;
936 u32 idx;
937 u8 comm;
938
939 pr_debug("DEP link up\n");
940
941 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
942 !info->attrs[NFC_ATTR_COMM_MODE])
943 return -EINVAL;
944
945 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
946 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
947 tgt_idx = NFC_TARGET_IDX_ANY;
948 else
949 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
950
951 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
952
953 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
954 return -EINVAL;
955
956 dev = nfc_get_device(idx);
957 if (!dev)
958 return -ENODEV;
959
960 rc = nfc_dep_link_up(dev, tgt_idx, comm);
961
962 nfc_put_device(dev);
963
964 return rc;
965}
966
967static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
968{
969 struct nfc_dev *dev;
970 int rc;
971 u32 idx;
972
973 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
974 !info->attrs[NFC_ATTR_TARGET_INDEX])
975 return -EINVAL;
976
977 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
978
979 dev = nfc_get_device(idx);
980 if (!dev)
981 return -ENODEV;
982
983 rc = nfc_dep_link_down(dev);
984
985 nfc_put_device(dev);
986 return rc;
987}
988
989static int nfc_genl_send_params(struct sk_buff *msg,
990 struct nfc_llcp_local *local,
991 u32 portid, u32 seq)
992{
993 void *hdr;
994
995 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
996 NFC_CMD_LLC_GET_PARAMS);
997 if (!hdr)
998 return -EMSGSIZE;
999
1000 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
1001 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
1002 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
1003 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
1004 goto nla_put_failure;
1005
1006 genlmsg_end(msg, hdr);
1007 return 0;
1008
1009nla_put_failure:
1010 genlmsg_cancel(msg, hdr);
1011 return -EMSGSIZE;
1012}
1013
1014static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
1015{
1016 struct nfc_dev *dev;
1017 struct nfc_llcp_local *local;
1018 int rc = 0;
1019 struct sk_buff *msg = NULL;
1020 u32 idx;
1021
1022 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1023 !info->attrs[NFC_ATTR_FIRMWARE_NAME])
1024 return -EINVAL;
1025
1026 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1027
1028 dev = nfc_get_device(idx);
1029 if (!dev)
1030 return -ENODEV;
1031
1032 device_lock(&dev->dev);
1033
1034 local = nfc_llcp_find_local(dev);
1035 if (!local) {
1036 rc = -ENODEV;
1037 goto exit;
1038 }
1039
1040 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1041 if (!msg) {
1042 rc = -ENOMEM;
1043 goto exit;
1044 }
1045
1046 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1047
1048exit:
1049 device_unlock(&dev->dev);
1050
1051 nfc_put_device(dev);
1052
1053 if (rc < 0) {
1054 if (msg)
1055 nlmsg_free(msg);
1056
1057 return rc;
1058 }
1059
1060 return genlmsg_reply(msg, info);
1061}
1062
1063static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1064{
1065 struct nfc_dev *dev;
1066 struct nfc_llcp_local *local;
1067 u8 rw = 0;
1068 u16 miux = 0;
1069 u32 idx;
1070 int rc = 0;
1071
1072 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1073 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1074 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1075 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1076 return -EINVAL;
1077
1078 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1079 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1080
1081 if (rw > LLCP_MAX_RW)
1082 return -EINVAL;
1083 }
1084
1085 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1086 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1087
1088 if (miux > LLCP_MAX_MIUX)
1089 return -EINVAL;
1090 }
1091
1092 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1093
1094 dev = nfc_get_device(idx);
1095 if (!dev)
1096 return -ENODEV;
1097
1098 device_lock(&dev->dev);
1099
1100 local = nfc_llcp_find_local(dev);
1101 if (!local) {
1102 rc = -ENODEV;
1103 goto exit;
1104 }
1105
1106 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1107 if (dev->dep_link_up) {
1108 rc = -EINPROGRESS;
1109 goto exit;
1110 }
1111
1112 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1113 }
1114
1115 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1116 local->rw = rw;
1117
1118 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1119 local->miux = cpu_to_be16(miux);
1120
1121exit:
1122 device_unlock(&dev->dev);
1123
1124 nfc_put_device(dev);
1125
1126 return rc;
1127}
1128
1129static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1130{
1131 struct nfc_dev *dev;
1132 struct nfc_llcp_local *local;
1133 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1134 u32 idx;
1135 u8 tid;
1136 char *uri;
1137 int rc = 0, rem;
1138 size_t uri_len, tlvs_len;
1139 struct hlist_head sdreq_list;
1140 struct nfc_llcp_sdp_tlv *sdreq;
1141
1142 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1143 !info->attrs[NFC_ATTR_LLC_SDP])
1144 return -EINVAL;
1145
1146 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1147
1148 dev = nfc_get_device(idx);
1149 if (!dev)
1150 return -ENODEV;
1151
1152 device_lock(&dev->dev);
1153
1154 if (dev->dep_link_up == false) {
1155 rc = -ENOLINK;
1156 goto exit;
1157 }
1158
1159 local = nfc_llcp_find_local(dev);
1160 if (!local) {
1161 rc = -ENODEV;
1162 goto exit;
1163 }
1164
1165 INIT_HLIST_HEAD(&sdreq_list);
1166
1167 tlvs_len = 0;
1168
1169 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1170 rc = nla_parse_nested_deprecated(sdp_attrs, NFC_SDP_ATTR_MAX,
1171 attr, nfc_sdp_genl_policy,
1172 info->extack);
1173
1174 if (rc != 0) {
1175 rc = -EINVAL;
1176 goto exit;
1177 }
1178
1179 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1180 continue;
1181
1182 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1183 if (uri_len == 0)
1184 continue;
1185
1186 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1187 if (uri == NULL || *uri == 0)
1188 continue;
1189
1190 tid = local->sdreq_next_tid++;
1191
1192 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1193 if (sdreq == NULL) {
1194 rc = -ENOMEM;
1195 goto exit;
1196 }
1197
1198 tlvs_len += sdreq->tlv_len;
1199
1200 hlist_add_head(&sdreq->node, &sdreq_list);
1201 }
1202
1203 if (hlist_empty(&sdreq_list)) {
1204 rc = -EINVAL;
1205 goto exit;
1206 }
1207
1208 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1209exit:
1210 device_unlock(&dev->dev);
1211
1212 nfc_put_device(dev);
1213
1214 return rc;
1215}
1216
1217static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1218{
1219 struct nfc_dev *dev;
1220 int rc;
1221 u32 idx;
1222 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1223
1224 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1225 return -EINVAL;
1226
1227 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1228
1229 dev = nfc_get_device(idx);
1230 if (!dev)
1231 return -ENODEV;
1232
1233 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1234 sizeof(firmware_name));
1235
1236 rc = nfc_fw_download(dev, firmware_name);
1237
1238 nfc_put_device(dev);
1239 return rc;
1240}
1241
1242int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1243 u32 result)
1244{
1245 struct sk_buff *msg;
1246 void *hdr;
1247
1248 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1249 if (!msg)
1250 return -ENOMEM;
1251
1252 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1253 NFC_CMD_FW_DOWNLOAD);
1254 if (!hdr)
1255 goto free_msg;
1256
1257 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1258 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1259 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1260 goto nla_put_failure;
1261
1262 genlmsg_end(msg, hdr);
1263
1264 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1265
1266 return 0;
1267
1268nla_put_failure:
1269free_msg:
1270 nlmsg_free(msg);
1271 return -EMSGSIZE;
1272}
1273
1274static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1275{
1276 struct nfc_dev *dev;
1277 int rc;
1278 u32 idx, se_idx;
1279
1280 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1281 !info->attrs[NFC_ATTR_SE_INDEX])
1282 return -EINVAL;
1283
1284 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1285 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1286
1287 dev = nfc_get_device(idx);
1288 if (!dev)
1289 return -ENODEV;
1290
1291 rc = nfc_enable_se(dev, se_idx);
1292
1293 nfc_put_device(dev);
1294 return rc;
1295}
1296
1297static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1298{
1299 struct nfc_dev *dev;
1300 int rc;
1301 u32 idx, se_idx;
1302
1303 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1304 !info->attrs[NFC_ATTR_SE_INDEX])
1305 return -EINVAL;
1306
1307 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1308 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1309
1310 dev = nfc_get_device(idx);
1311 if (!dev)
1312 return -ENODEV;
1313
1314 rc = nfc_disable_se(dev, se_idx);
1315
1316 nfc_put_device(dev);
1317 return rc;
1318}
1319
1320static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1321 u32 portid, u32 seq,
1322 struct netlink_callback *cb,
1323 int flags)
1324{
1325 void *hdr;
1326 struct nfc_se *se, *n;
1327
1328 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1329 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1330 NFC_CMD_GET_SE);
1331 if (!hdr)
1332 goto nla_put_failure;
1333
1334 if (cb)
1335 genl_dump_check_consistent(cb, hdr);
1336
1337 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1338 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1339 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1340 goto nla_put_failure;
1341
1342 genlmsg_end(msg, hdr);
1343 }
1344
1345 return 0;
1346
1347nla_put_failure:
1348 genlmsg_cancel(msg, hdr);
1349 return -EMSGSIZE;
1350}
1351
1352static int nfc_genl_dump_ses(struct sk_buff *skb,
1353 struct netlink_callback *cb)
1354{
1355 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1356 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1357 bool first_call = false;
1358
1359 if (!iter) {
1360 first_call = true;
1361 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1362 if (!iter)
1363 return -ENOMEM;
1364 cb->args[0] = (long) iter;
1365 }
1366
1367 mutex_lock(&nfc_devlist_mutex);
1368
1369 cb->seq = nfc_devlist_generation;
1370
1371 if (first_call) {
1372 nfc_device_iter_init(iter);
1373 dev = nfc_device_iter_next(iter);
1374 }
1375
1376 while (dev) {
1377 int rc;
1378
1379 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1380 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1381 if (rc < 0)
1382 break;
1383
1384 dev = nfc_device_iter_next(iter);
1385 }
1386
1387 mutex_unlock(&nfc_devlist_mutex);
1388
1389 cb->args[1] = (long) dev;
1390
1391 return skb->len;
1392}
1393
1394static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1395{
1396 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1397
1398 nfc_device_iter_exit(iter);
1399 kfree(iter);
1400
1401 return 0;
1402}
1403
1404static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1405 u8 *apdu, size_t apdu_length,
1406 se_io_cb_t cb, void *cb_context)
1407{
1408 struct nfc_se *se;
1409 int rc;
1410
1411 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1412
1413 device_lock(&dev->dev);
1414
1415 if (!device_is_registered(&dev->dev)) {
1416 rc = -ENODEV;
1417 goto error;
1418 }
1419
1420 if (!dev->dev_up) {
1421 rc = -ENODEV;
1422 goto error;
1423 }
1424
1425 if (!dev->ops->se_io) {
1426 rc = -EOPNOTSUPP;
1427 goto error;
1428 }
1429
1430 se = nfc_find_se(dev, se_idx);
1431 if (!se) {
1432 rc = -EINVAL;
1433 goto error;
1434 }
1435
1436 if (se->state != NFC_SE_ENABLED) {
1437 rc = -ENODEV;
1438 goto error;
1439 }
1440
1441 rc = dev->ops->se_io(dev, se_idx, apdu,
1442 apdu_length, cb, cb_context);
1443
1444error:
1445 device_unlock(&dev->dev);
1446 return rc;
1447}
1448
1449struct se_io_ctx {
1450 u32 dev_idx;
1451 u32 se_idx;
1452};
1453
1454static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1455{
1456 struct se_io_ctx *ctx = context;
1457 struct sk_buff *msg;
1458 void *hdr;
1459
1460 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1461 if (!msg) {
1462 kfree(ctx);
1463 return;
1464 }
1465
1466 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1467 NFC_CMD_SE_IO);
1468 if (!hdr)
1469 goto free_msg;
1470
1471 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1472 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1473 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1474 goto nla_put_failure;
1475
1476 genlmsg_end(msg, hdr);
1477
1478 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1479
1480 kfree(ctx);
1481
1482 return;
1483
1484nla_put_failure:
1485free_msg:
1486 nlmsg_free(msg);
1487 kfree(ctx);
1488
1489 return;
1490}
1491
1492static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1493{
1494 struct nfc_dev *dev;
1495 struct se_io_ctx *ctx;
1496 u32 dev_idx, se_idx;
1497 u8 *apdu;
1498 size_t apdu_len;
1499
1500 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1501 !info->attrs[NFC_ATTR_SE_INDEX] ||
1502 !info->attrs[NFC_ATTR_SE_APDU])
1503 return -EINVAL;
1504
1505 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1506 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1507
1508 dev = nfc_get_device(dev_idx);
1509 if (!dev)
1510 return -ENODEV;
1511
1512 if (!dev->ops || !dev->ops->se_io)
1513 return -ENOTSUPP;
1514
1515 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1516 if (apdu_len == 0)
1517 return -EINVAL;
1518
1519 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1520 if (!apdu)
1521 return -EINVAL;
1522
1523 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1524 if (!ctx)
1525 return -ENOMEM;
1526
1527 ctx->dev_idx = dev_idx;
1528 ctx->se_idx = se_idx;
1529
1530 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1531}
1532
1533static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1534 struct genl_info *info)
1535{
1536 struct nfc_dev *dev;
1537 struct nfc_vendor_cmd *cmd;
1538 u32 dev_idx, vid, subcmd;
1539 u8 *data;
1540 size_t data_len;
1541 int i, err;
1542
1543 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1544 !info->attrs[NFC_ATTR_VENDOR_ID] ||
1545 !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1546 return -EINVAL;
1547
1548 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1549 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1550 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1551
1552 dev = nfc_get_device(dev_idx);
1553 if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
1554 return -ENODEV;
1555
1556 if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1557 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1558 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1559 if (data_len == 0)
1560 return -EINVAL;
1561 } else {
1562 data = NULL;
1563 data_len = 0;
1564 }
1565
1566 for (i = 0; i < dev->n_vendor_cmds; i++) {
1567 cmd = &dev->vendor_cmds[i];
1568
1569 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1570 continue;
1571
1572 dev->cur_cmd_info = info;
1573 err = cmd->doit(dev, data, data_len);
1574 dev->cur_cmd_info = NULL;
1575 return err;
1576 }
1577
1578 return -EOPNOTSUPP;
1579}
1580
1581
1582static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1583 int flags, u8 cmd)
1584{
1585
1586 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1587}
1588
1589static struct sk_buff *
1590__nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1591 u32 portid, u32 seq,
1592 enum nfc_attrs attr,
1593 u32 oui, u32 subcmd, gfp_t gfp)
1594{
1595 struct sk_buff *skb;
1596 void *hdr;
1597
1598 skb = nlmsg_new(approxlen + 100, gfp);
1599 if (!skb)
1600 return NULL;
1601
1602 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1603 if (!hdr) {
1604 kfree_skb(skb);
1605 return NULL;
1606 }
1607
1608 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1609 goto nla_put_failure;
1610 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1611 goto nla_put_failure;
1612 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1613 goto nla_put_failure;
1614
1615 ((void **)skb->cb)[0] = dev;
1616 ((void **)skb->cb)[1] = hdr;
1617
1618 return skb;
1619
1620nla_put_failure:
1621 kfree_skb(skb);
1622 return NULL;
1623}
1624
1625struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1626 enum nfc_attrs attr,
1627 u32 oui, u32 subcmd,
1628 int approxlen)
1629{
1630 if (WARN_ON(!dev->cur_cmd_info))
1631 return NULL;
1632
1633 return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1634 dev->cur_cmd_info->snd_portid,
1635 dev->cur_cmd_info->snd_seq, attr,
1636 oui, subcmd, GFP_KERNEL);
1637}
1638EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1639
1640int nfc_vendor_cmd_reply(struct sk_buff *skb)
1641{
1642 struct nfc_dev *dev = ((void **)skb->cb)[0];
1643 void *hdr = ((void **)skb->cb)[1];
1644
1645
1646 memset(skb->cb, 0, sizeof(skb->cb));
1647
1648 if (WARN_ON(!dev->cur_cmd_info)) {
1649 kfree_skb(skb);
1650 return -EINVAL;
1651 }
1652
1653 genlmsg_end(skb, hdr);
1654 return genlmsg_reply(skb, dev->cur_cmd_info);
1655}
1656EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1657
1658static const struct genl_ops nfc_genl_ops[] = {
1659 {
1660 .cmd = NFC_CMD_GET_DEVICE,
1661 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1662 .doit = nfc_genl_get_device,
1663 .dumpit = nfc_genl_dump_devices,
1664 .done = nfc_genl_dump_devices_done,
1665 },
1666 {
1667 .cmd = NFC_CMD_DEV_UP,
1668 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1669 .doit = nfc_genl_dev_up,
1670 },
1671 {
1672 .cmd = NFC_CMD_DEV_DOWN,
1673 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1674 .doit = nfc_genl_dev_down,
1675 },
1676 {
1677 .cmd = NFC_CMD_START_POLL,
1678 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1679 .doit = nfc_genl_start_poll,
1680 },
1681 {
1682 .cmd = NFC_CMD_STOP_POLL,
1683 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1684 .doit = nfc_genl_stop_poll,
1685 },
1686 {
1687 .cmd = NFC_CMD_DEP_LINK_UP,
1688 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1689 .doit = nfc_genl_dep_link_up,
1690 },
1691 {
1692 .cmd = NFC_CMD_DEP_LINK_DOWN,
1693 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1694 .doit = nfc_genl_dep_link_down,
1695 },
1696 {
1697 .cmd = NFC_CMD_GET_TARGET,
1698 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1699 .dumpit = nfc_genl_dump_targets,
1700 .done = nfc_genl_dump_targets_done,
1701 },
1702 {
1703 .cmd = NFC_CMD_LLC_GET_PARAMS,
1704 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1705 .doit = nfc_genl_llc_get_params,
1706 },
1707 {
1708 .cmd = NFC_CMD_LLC_SET_PARAMS,
1709 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1710 .doit = nfc_genl_llc_set_params,
1711 },
1712 {
1713 .cmd = NFC_CMD_LLC_SDREQ,
1714 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1715 .doit = nfc_genl_llc_sdreq,
1716 },
1717 {
1718 .cmd = NFC_CMD_FW_DOWNLOAD,
1719 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1720 .doit = nfc_genl_fw_download,
1721 },
1722 {
1723 .cmd = NFC_CMD_ENABLE_SE,
1724 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1725 .doit = nfc_genl_enable_se,
1726 },
1727 {
1728 .cmd = NFC_CMD_DISABLE_SE,
1729 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1730 .doit = nfc_genl_disable_se,
1731 },
1732 {
1733 .cmd = NFC_CMD_GET_SE,
1734 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1735 .dumpit = nfc_genl_dump_ses,
1736 .done = nfc_genl_dump_ses_done,
1737 },
1738 {
1739 .cmd = NFC_CMD_SE_IO,
1740 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1741 .doit = nfc_genl_se_io,
1742 },
1743 {
1744 .cmd = NFC_CMD_ACTIVATE_TARGET,
1745 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1746 .doit = nfc_genl_activate_target,
1747 },
1748 {
1749 .cmd = NFC_CMD_VENDOR,
1750 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1751 .doit = nfc_genl_vendor_cmd,
1752 },
1753 {
1754 .cmd = NFC_CMD_DEACTIVATE_TARGET,
1755 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1756 .doit = nfc_genl_deactivate_target,
1757 },
1758};
1759
1760static struct genl_family nfc_genl_family __ro_after_init = {
1761 .hdrsize = 0,
1762 .name = NFC_GENL_NAME,
1763 .version = NFC_GENL_VERSION,
1764 .maxattr = NFC_ATTR_MAX,
1765 .policy = nfc_genl_policy,
1766 .module = THIS_MODULE,
1767 .ops = nfc_genl_ops,
1768 .n_ops = ARRAY_SIZE(nfc_genl_ops),
1769 .mcgrps = nfc_genl_mcgrps,
1770 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
1771};
1772
1773
1774struct urelease_work {
1775 struct work_struct w;
1776 u32 portid;
1777};
1778
1779static void nfc_urelease_event_work(struct work_struct *work)
1780{
1781 struct urelease_work *w = container_of(work, struct urelease_work, w);
1782 struct class_dev_iter iter;
1783 struct nfc_dev *dev;
1784
1785 pr_debug("portid %d\n", w->portid);
1786
1787 mutex_lock(&nfc_devlist_mutex);
1788
1789 nfc_device_iter_init(&iter);
1790 dev = nfc_device_iter_next(&iter);
1791
1792 while (dev) {
1793 mutex_lock(&dev->genl_data.genl_data_mutex);
1794
1795 if (dev->genl_data.poll_req_portid == w->portid) {
1796 nfc_stop_poll(dev);
1797 dev->genl_data.poll_req_portid = 0;
1798 }
1799
1800 mutex_unlock(&dev->genl_data.genl_data_mutex);
1801
1802 dev = nfc_device_iter_next(&iter);
1803 }
1804
1805 nfc_device_iter_exit(&iter);
1806
1807 mutex_unlock(&nfc_devlist_mutex);
1808
1809 kfree(w);
1810}
1811
1812static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1813 unsigned long event, void *ptr)
1814{
1815 struct netlink_notify *n = ptr;
1816 struct urelease_work *w;
1817
1818 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1819 goto out;
1820
1821 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1822
1823 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1824 if (w) {
1825 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1826 w->portid = n->portid;
1827 schedule_work((struct work_struct *) w);
1828 }
1829
1830out:
1831 return NOTIFY_DONE;
1832}
1833
1834void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1835{
1836 genl_data->poll_req_portid = 0;
1837 mutex_init(&genl_data->genl_data_mutex);
1838}
1839
1840void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1841{
1842 mutex_destroy(&genl_data->genl_data_mutex);
1843}
1844
1845static struct notifier_block nl_notifier = {
1846 .notifier_call = nfc_genl_rcv_nl_event,
1847};
1848
1849
1850
1851
1852
1853
1854int __init nfc_genl_init(void)
1855{
1856 int rc;
1857
1858 rc = genl_register_family(&nfc_genl_family);
1859 if (rc)
1860 return rc;
1861
1862 netlink_register_notifier(&nl_notifier);
1863
1864 return 0;
1865}
1866
1867
1868
1869
1870
1871
1872void nfc_genl_exit(void)
1873{
1874 netlink_unregister_notifier(&nl_notifier);
1875 genl_unregister_family(&nfc_genl_family);
1876}
1877
