Merge tag 'mips_6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
[platform/kernel/linux-starfive.git] / net / nfc / netlink.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (C) 2011 Instituto Nokia de Tecnologia
4  *
5  * Authors:
6  *    Lauro Ramos Venancio <lauro.venancio@openbossa.org>
7  *    Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
8  *
9  * Vendor commands implementation based on net/wireless/nl80211.c
10  * which is:
11  *
12  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
13  * Copyright 2013-2014  Intel Mobile Communications GmbH
14  */
15
16 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
17
18 #include <net/genetlink.h>
19 #include <linux/nfc.h>
20 #include <linux/slab.h>
21
22 #include "nfc.h"
23 #include "llcp.h"
24
25 static const struct genl_multicast_group nfc_genl_mcgrps[] = {
26         { .name = NFC_GENL_MCAST_EVENT_NAME, },
27 };
28
29 static struct genl_family nfc_genl_family;
30 static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
31         [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
32         [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
33                                 .len = NFC_DEVICE_NAME_MAXSIZE },
34         [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
35         [NFC_ATTR_TARGET_INDEX] = { .type = NLA_U32 },
36         [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
37         [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
38         [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
39         [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
40         [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
41         [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
42         [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
43         [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
44         [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
45         [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
46                                      .len = NFC_FIRMWARE_NAME_MAXSIZE },
47         [NFC_ATTR_SE_INDEX] = { .type = NLA_U32 },
48         [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
49         [NFC_ATTR_VENDOR_ID] = { .type = NLA_U32 },
50         [NFC_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
51         [NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
52
53 };
54
55 static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
56         [NFC_SDP_ATTR_URI] = { .type = NLA_STRING,
57                                .len = U8_MAX - 4 },
58         [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
59 };
60
61 static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
62                                 struct netlink_callback *cb, int flags)
63 {
64         void *hdr;
65
66         hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
67                           &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
68         if (!hdr)
69                 return -EMSGSIZE;
70
71         genl_dump_check_consistent(cb, hdr);
72
73         if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
74             nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
75             nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
76             nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
77                 goto nla_put_failure;
78         if (target->nfcid1_len > 0 &&
79             nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
80                     target->nfcid1))
81                 goto nla_put_failure;
82         if (target->sensb_res_len > 0 &&
83             nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
84                     target->sensb_res))
85                 goto nla_put_failure;
86         if (target->sensf_res_len > 0 &&
87             nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
88                     target->sensf_res))
89                 goto nla_put_failure;
90
91         if (target->is_iso15693) {
92                 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
93                                target->iso15693_dsfid) ||
94                     nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
95                             sizeof(target->iso15693_uid), target->iso15693_uid))
96                         goto nla_put_failure;
97         }
98
99         genlmsg_end(msg, hdr);
100         return 0;
101
102 nla_put_failure:
103         genlmsg_cancel(msg, hdr);
104         return -EMSGSIZE;
105 }
106
107 static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
108 {
109         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
110         struct nfc_dev *dev;
111         u32 idx;
112
113         if (!info->info.attrs[NFC_ATTR_DEVICE_INDEX])
114                 return ERR_PTR(-EINVAL);
115
116         idx = nla_get_u32(info->info.attrs[NFC_ATTR_DEVICE_INDEX]);
117
118         dev = nfc_get_device(idx);
119         if (!dev)
120                 return ERR_PTR(-ENODEV);
121
122         return dev;
123 }
124
125 static int nfc_genl_dump_targets(struct sk_buff *skb,
126                                  struct netlink_callback *cb)
127 {
128         int i = cb->args[0];
129         struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
130         int rc;
131
132         if (!dev) {
133                 dev = __get_device_from_cb(cb);
134                 if (IS_ERR(dev))
135                         return PTR_ERR(dev);
136
137                 cb->args[1] = (long) dev;
138         }
139
140         device_lock(&dev->dev);
141
142         cb->seq = dev->targets_generation;
143
144         while (i < dev->n_targets) {
145                 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
146                                           NLM_F_MULTI);
147                 if (rc < 0)
148                         break;
149
150                 i++;
151         }
152
153         device_unlock(&dev->dev);
154
155         cb->args[0] = i;
156
157         return skb->len;
158 }
159
160 static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
161 {
162         struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
163
164         if (dev)
165                 nfc_put_device(dev);
166
167         return 0;
168 }
169
170 int nfc_genl_targets_found(struct nfc_dev *dev)
171 {
172         struct sk_buff *msg;
173         void *hdr;
174
175         dev->genl_data.poll_req_portid = 0;
176
177         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
178         if (!msg)
179                 return -ENOMEM;
180
181         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
182                           NFC_EVENT_TARGETS_FOUND);
183         if (!hdr)
184                 goto free_msg;
185
186         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
187                 goto nla_put_failure;
188
189         genlmsg_end(msg, hdr);
190
191         return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
192
193 nla_put_failure:
194 free_msg:
195         nlmsg_free(msg);
196         return -EMSGSIZE;
197 }
198
199 int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
200 {
201         struct sk_buff *msg;
202         void *hdr;
203
204         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
205         if (!msg)
206                 return -ENOMEM;
207
208         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
209                           NFC_EVENT_TARGET_LOST);
210         if (!hdr)
211                 goto free_msg;
212
213         if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
214             nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
215                 goto nla_put_failure;
216
217         genlmsg_end(msg, hdr);
218
219         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
220
221         return 0;
222
223 nla_put_failure:
224 free_msg:
225         nlmsg_free(msg);
226         return -EMSGSIZE;
227 }
228
229 int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
230 {
231         struct sk_buff *msg;
232         void *hdr;
233
234         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
235         if (!msg)
236                 return -ENOMEM;
237
238         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
239                           NFC_EVENT_TM_ACTIVATED);
240         if (!hdr)
241                 goto free_msg;
242
243         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
244                 goto nla_put_failure;
245         if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
246                 goto nla_put_failure;
247
248         genlmsg_end(msg, hdr);
249
250         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
251
252         return 0;
253
254 nla_put_failure:
255 free_msg:
256         nlmsg_free(msg);
257         return -EMSGSIZE;
258 }
259
260 int nfc_genl_tm_deactivated(struct nfc_dev *dev)
261 {
262         struct sk_buff *msg;
263         void *hdr;
264
265         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
266         if (!msg)
267                 return -ENOMEM;
268
269         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
270                           NFC_EVENT_TM_DEACTIVATED);
271         if (!hdr)
272                 goto free_msg;
273
274         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
275                 goto nla_put_failure;
276
277         genlmsg_end(msg, hdr);
278
279         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
280
281         return 0;
282
283 nla_put_failure:
284 free_msg:
285         nlmsg_free(msg);
286         return -EMSGSIZE;
287 }
288
289 static int nfc_genl_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg)
290 {
291         if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
292             nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
293             nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
294             nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
295             nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
296                 return -1;
297         return 0;
298 }
299
300 int nfc_genl_device_added(struct nfc_dev *dev)
301 {
302         struct sk_buff *msg;
303         void *hdr;
304
305         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
306         if (!msg)
307                 return -ENOMEM;
308
309         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
310                           NFC_EVENT_DEVICE_ADDED);
311         if (!hdr)
312                 goto free_msg;
313
314         if (nfc_genl_setup_device_added(dev, msg))
315                 goto nla_put_failure;
316
317         genlmsg_end(msg, hdr);
318
319         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
320
321         return 0;
322
323 nla_put_failure:
324 free_msg:
325         nlmsg_free(msg);
326         return -EMSGSIZE;
327 }
328
329 int nfc_genl_device_removed(struct nfc_dev *dev)
330 {
331         struct sk_buff *msg;
332         void *hdr;
333
334         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
335         if (!msg)
336                 return -ENOMEM;
337
338         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
339                           NFC_EVENT_DEVICE_REMOVED);
340         if (!hdr)
341                 goto free_msg;
342
343         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
344                 goto nla_put_failure;
345
346         genlmsg_end(msg, hdr);
347
348         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
349
350         return 0;
351
352 nla_put_failure:
353 free_msg:
354         nlmsg_free(msg);
355         return -EMSGSIZE;
356 }
357
358 int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
359 {
360         struct sk_buff *msg;
361         struct nlattr *sdp_attr, *uri_attr;
362         struct nfc_llcp_sdp_tlv *sdres;
363         struct hlist_node *n;
364         void *hdr;
365         int rc = -EMSGSIZE;
366         int i;
367
368         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
369         if (!msg)
370                 return -ENOMEM;
371
372         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
373                           NFC_EVENT_LLC_SDRES);
374         if (!hdr)
375                 goto free_msg;
376
377         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
378                 goto nla_put_failure;
379
380         sdp_attr = nla_nest_start_noflag(msg, NFC_ATTR_LLC_SDP);
381         if (sdp_attr == NULL) {
382                 rc = -ENOMEM;
383                 goto nla_put_failure;
384         }
385
386         i = 1;
387         hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
388                 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
389
390                 uri_attr = nla_nest_start_noflag(msg, i++);
391                 if (uri_attr == NULL) {
392                         rc = -ENOMEM;
393                         goto nla_put_failure;
394                 }
395
396                 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
397                         goto nla_put_failure;
398
399                 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
400                         goto nla_put_failure;
401
402                 nla_nest_end(msg, uri_attr);
403
404                 hlist_del(&sdres->node);
405
406                 nfc_llcp_free_sdp_tlv(sdres);
407         }
408
409         nla_nest_end(msg, sdp_attr);
410
411         genlmsg_end(msg, hdr);
412
413         return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
414
415 nla_put_failure:
416 free_msg:
417         nlmsg_free(msg);
418
419         nfc_llcp_free_sdp_tlv_list(sdres_list);
420
421         return rc;
422 }
423
424 int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
425 {
426         struct sk_buff *msg;
427         void *hdr;
428
429         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
430         if (!msg)
431                 return -ENOMEM;
432
433         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
434                           NFC_EVENT_SE_ADDED);
435         if (!hdr)
436                 goto free_msg;
437
438         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
439             nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
440             nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
441                 goto nla_put_failure;
442
443         genlmsg_end(msg, hdr);
444
445         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
446
447         return 0;
448
449 nla_put_failure:
450 free_msg:
451         nlmsg_free(msg);
452         return -EMSGSIZE;
453 }
454
455 int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
456 {
457         struct sk_buff *msg;
458         void *hdr;
459
460         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
461         if (!msg)
462                 return -ENOMEM;
463
464         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
465                           NFC_EVENT_SE_REMOVED);
466         if (!hdr)
467                 goto free_msg;
468
469         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
470             nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
471                 goto nla_put_failure;
472
473         genlmsg_end(msg, hdr);
474
475         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
476
477         return 0;
478
479 nla_put_failure:
480 free_msg:
481         nlmsg_free(msg);
482         return -EMSGSIZE;
483 }
484
485 int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
486                             struct nfc_evt_transaction *evt_transaction)
487 {
488         struct nfc_se *se;
489         struct sk_buff *msg;
490         void *hdr;
491
492         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
493         if (!msg)
494                 return -ENOMEM;
495
496         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
497                           NFC_EVENT_SE_TRANSACTION);
498         if (!hdr)
499                 goto free_msg;
500
501         se = nfc_find_se(dev, se_idx);
502         if (!se)
503                 goto free_msg;
504
505         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
506             nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
507             nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
508             nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
509                     evt_transaction->aid) ||
510             nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
511                     evt_transaction->params))
512                 goto nla_put_failure;
513
514         /* evt_transaction is no more used */
515         devm_kfree(&dev->dev, evt_transaction);
516
517         genlmsg_end(msg, hdr);
518
519         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
520
521         return 0;
522
523 nla_put_failure:
524 free_msg:
525         /* evt_transaction is no more used */
526         devm_kfree(&dev->dev, evt_transaction);
527         nlmsg_free(msg);
528         return -EMSGSIZE;
529 }
530
531 int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
532 {
533         const struct nfc_se *se;
534         struct sk_buff *msg;
535         void *hdr;
536
537         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
538         if (!msg)
539                 return -ENOMEM;
540
541         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
542                           NFC_EVENT_SE_CONNECTIVITY);
543         if (!hdr)
544                 goto free_msg;
545
546         se = nfc_find_se(dev, se_idx);
547         if (!se)
548                 goto free_msg;
549
550         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
551             nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
552             nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
553                 goto nla_put_failure;
554
555         genlmsg_end(msg, hdr);
556
557         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
558
559         return 0;
560
561 nla_put_failure:
562 free_msg:
563         nlmsg_free(msg);
564         return -EMSGSIZE;
565 }
566
567 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
568                                 u32 portid, u32 seq,
569                                 struct netlink_callback *cb,
570                                 int flags)
571 {
572         void *hdr;
573
574         hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
575                           NFC_CMD_GET_DEVICE);
576         if (!hdr)
577                 return -EMSGSIZE;
578
579         if (cb)
580                 genl_dump_check_consistent(cb, hdr);
581
582         if (nfc_genl_setup_device_added(dev, msg))
583                 goto nla_put_failure;
584
585         genlmsg_end(msg, hdr);
586         return 0;
587
588 nla_put_failure:
589         genlmsg_cancel(msg, hdr);
590         return -EMSGSIZE;
591 }
592
593 static int nfc_genl_dump_devices(struct sk_buff *skb,
594                                  struct netlink_callback *cb)
595 {
596         struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
597         struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
598         bool first_call = false;
599
600         if (!iter) {
601                 first_call = true;
602                 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
603                 if (!iter)
604                         return -ENOMEM;
605                 cb->args[0] = (long) iter;
606         }
607
608         mutex_lock(&nfc_devlist_mutex);
609
610         cb->seq = nfc_devlist_generation;
611
612         if (first_call) {
613                 nfc_device_iter_init(iter);
614                 dev = nfc_device_iter_next(iter);
615         }
616
617         while (dev) {
618                 int rc;
619
620                 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
621                                           cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
622                 if (rc < 0)
623                         break;
624
625                 dev = nfc_device_iter_next(iter);
626         }
627
628         mutex_unlock(&nfc_devlist_mutex);
629
630         cb->args[1] = (long) dev;
631
632         return skb->len;
633 }
634
635 static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
636 {
637         struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
638
639         if (iter) {
640                 nfc_device_iter_exit(iter);
641                 kfree(iter);
642         }
643
644         return 0;
645 }
646
647 int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
648                                u8 comm_mode, u8 rf_mode)
649 {
650         struct sk_buff *msg;
651         void *hdr;
652
653         pr_debug("DEP link is up\n");
654
655         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
656         if (!msg)
657                 return -ENOMEM;
658
659         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
660         if (!hdr)
661                 goto free_msg;
662
663         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
664                 goto nla_put_failure;
665         if (rf_mode == NFC_RF_INITIATOR &&
666             nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
667                 goto nla_put_failure;
668         if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
669             nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
670                 goto nla_put_failure;
671
672         genlmsg_end(msg, hdr);
673
674         dev->dep_link_up = true;
675
676         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
677
678         return 0;
679
680 nla_put_failure:
681 free_msg:
682         nlmsg_free(msg);
683         return -EMSGSIZE;
684 }
685
686 int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
687 {
688         struct sk_buff *msg;
689         void *hdr;
690
691         pr_debug("DEP link is down\n");
692
693         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
694         if (!msg)
695                 return -ENOMEM;
696
697         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
698                           NFC_CMD_DEP_LINK_DOWN);
699         if (!hdr)
700                 goto free_msg;
701
702         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
703                 goto nla_put_failure;
704
705         genlmsg_end(msg, hdr);
706
707         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
708
709         return 0;
710
711 nla_put_failure:
712 free_msg:
713         nlmsg_free(msg);
714         return -EMSGSIZE;
715 }
716
717 static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
718 {
719         struct sk_buff *msg;
720         struct nfc_dev *dev;
721         u32 idx;
722         int rc = -ENOBUFS;
723
724         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
725                 return -EINVAL;
726
727         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
728
729         dev = nfc_get_device(idx);
730         if (!dev)
731                 return -ENODEV;
732
733         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
734         if (!msg) {
735                 rc = -ENOMEM;
736                 goto out_putdev;
737         }
738
739         rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
740                                   NULL, 0);
741         if (rc < 0)
742                 goto out_free;
743
744         nfc_put_device(dev);
745
746         return genlmsg_reply(msg, info);
747
748 out_free:
749         nlmsg_free(msg);
750 out_putdev:
751         nfc_put_device(dev);
752         return rc;
753 }
754
755 static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
756 {
757         struct nfc_dev *dev;
758         int rc;
759         u32 idx;
760
761         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
762                 return -EINVAL;
763
764         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
765
766         dev = nfc_get_device(idx);
767         if (!dev)
768                 return -ENODEV;
769
770         rc = nfc_dev_up(dev);
771
772         nfc_put_device(dev);
773         return rc;
774 }
775
776 static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
777 {
778         struct nfc_dev *dev;
779         int rc;
780         u32 idx;
781
782         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
783                 return -EINVAL;
784
785         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
786
787         dev = nfc_get_device(idx);
788         if (!dev)
789                 return -ENODEV;
790
791         rc = nfc_dev_down(dev);
792
793         nfc_put_device(dev);
794         return rc;
795 }
796
797 static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
798 {
799         struct nfc_dev *dev;
800         int rc;
801         u32 idx;
802         u32 im_protocols = 0, tm_protocols = 0;
803
804         pr_debug("Poll start\n");
805
806         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
807             ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
808               !info->attrs[NFC_ATTR_PROTOCOLS]) &&
809               !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
810                 return -EINVAL;
811
812         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
813
814         if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
815                 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
816
817         if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
818                 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
819         else if (info->attrs[NFC_ATTR_PROTOCOLS])
820                 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
821
822         dev = nfc_get_device(idx);
823         if (!dev)
824                 return -ENODEV;
825
826         mutex_lock(&dev->genl_data.genl_data_mutex);
827
828         rc = nfc_start_poll(dev, im_protocols, tm_protocols);
829         if (!rc)
830                 dev->genl_data.poll_req_portid = info->snd_portid;
831
832         mutex_unlock(&dev->genl_data.genl_data_mutex);
833
834         nfc_put_device(dev);
835         return rc;
836 }
837
838 static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
839 {
840         struct nfc_dev *dev;
841         int rc;
842         u32 idx;
843
844         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
845                 return -EINVAL;
846
847         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
848
849         dev = nfc_get_device(idx);
850         if (!dev)
851                 return -ENODEV;
852
853         device_lock(&dev->dev);
854
855         if (!dev->polling) {
856                 device_unlock(&dev->dev);
857                 nfc_put_device(dev);
858                 return -EINVAL;
859         }
860
861         device_unlock(&dev->dev);
862
863         mutex_lock(&dev->genl_data.genl_data_mutex);
864
865         if (dev->genl_data.poll_req_portid != info->snd_portid) {
866                 rc = -EBUSY;
867                 goto out;
868         }
869
870         rc = nfc_stop_poll(dev);
871         dev->genl_data.poll_req_portid = 0;
872
873 out:
874         mutex_unlock(&dev->genl_data.genl_data_mutex);
875         nfc_put_device(dev);
876         return rc;
877 }
878
879 static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
880 {
881         struct nfc_dev *dev;
882         u32 device_idx, target_idx, protocol;
883         int rc;
884
885         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
886             !info->attrs[NFC_ATTR_TARGET_INDEX] ||
887             !info->attrs[NFC_ATTR_PROTOCOLS])
888                 return -EINVAL;
889
890         device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
891
892         dev = nfc_get_device(device_idx);
893         if (!dev)
894                 return -ENODEV;
895
896         target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
897         protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
898
899         nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
900         rc = nfc_activate_target(dev, target_idx, protocol);
901
902         nfc_put_device(dev);
903         return rc;
904 }
905
906 static int nfc_genl_deactivate_target(struct sk_buff *skb,
907                                       struct genl_info *info)
908 {
909         struct nfc_dev *dev;
910         u32 device_idx, target_idx;
911         int rc;
912
913         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
914             !info->attrs[NFC_ATTR_TARGET_INDEX])
915                 return -EINVAL;
916
917         device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
918
919         dev = nfc_get_device(device_idx);
920         if (!dev)
921                 return -ENODEV;
922
923         target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
924
925         rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
926
927         nfc_put_device(dev);
928         return rc;
929 }
930
931 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
932 {
933         struct nfc_dev *dev;
934         int rc, tgt_idx;
935         u32 idx;
936         u8 comm;
937
938         pr_debug("DEP link up\n");
939
940         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
941             !info->attrs[NFC_ATTR_COMM_MODE])
942                 return -EINVAL;
943
944         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
945         if (!info->attrs[NFC_ATTR_TARGET_INDEX])
946                 tgt_idx = NFC_TARGET_IDX_ANY;
947         else
948                 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
949
950         comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
951
952         if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
953                 return -EINVAL;
954
955         dev = nfc_get_device(idx);
956         if (!dev)
957                 return -ENODEV;
958
959         rc = nfc_dep_link_up(dev, tgt_idx, comm);
960
961         nfc_put_device(dev);
962
963         return rc;
964 }
965
966 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
967 {
968         struct nfc_dev *dev;
969         int rc;
970         u32 idx;
971
972         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
973             !info->attrs[NFC_ATTR_TARGET_INDEX])
974                 return -EINVAL;
975
976         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
977
978         dev = nfc_get_device(idx);
979         if (!dev)
980                 return -ENODEV;
981
982         rc = nfc_dep_link_down(dev);
983
984         nfc_put_device(dev);
985         return rc;
986 }
987
988 static int nfc_genl_send_params(struct sk_buff *msg,
989                                 struct nfc_llcp_local *local,
990                                 u32 portid, u32 seq)
991 {
992         void *hdr;
993
994         hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
995                           NFC_CMD_LLC_GET_PARAMS);
996         if (!hdr)
997                 return -EMSGSIZE;
998
999         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
1000             nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
1001             nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
1002             nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
1003                 goto nla_put_failure;
1004
1005         genlmsg_end(msg, hdr);
1006         return 0;
1007
1008 nla_put_failure:
1009         genlmsg_cancel(msg, hdr);
1010         return -EMSGSIZE;
1011 }
1012
1013 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
1014 {
1015         struct nfc_dev *dev;
1016         struct nfc_llcp_local *local;
1017         int rc = 0;
1018         struct sk_buff *msg = NULL;
1019         u32 idx;
1020
1021         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1022             !info->attrs[NFC_ATTR_FIRMWARE_NAME])
1023                 return -EINVAL;
1024
1025         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1026
1027         dev = nfc_get_device(idx);
1028         if (!dev)
1029                 return -ENODEV;
1030
1031         device_lock(&dev->dev);
1032
1033         local = nfc_llcp_find_local(dev);
1034         if (!local) {
1035                 rc = -ENODEV;
1036                 goto exit;
1037         }
1038
1039         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1040         if (!msg) {
1041                 rc = -ENOMEM;
1042                 goto put_local;
1043         }
1044
1045         rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1046
1047 put_local:
1048         nfc_llcp_local_put(local);
1049
1050 exit:
1051         device_unlock(&dev->dev);
1052
1053         nfc_put_device(dev);
1054
1055         if (rc < 0) {
1056                 if (msg)
1057                         nlmsg_free(msg);
1058
1059                 return rc;
1060         }
1061
1062         return genlmsg_reply(msg, info);
1063 }
1064
1065 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1066 {
1067         struct nfc_dev *dev;
1068         struct nfc_llcp_local *local;
1069         u8 rw = 0;
1070         u16 miux = 0;
1071         u32 idx;
1072         int rc = 0;
1073
1074         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1075             (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1076              !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1077              !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1078                 return -EINVAL;
1079
1080         if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1081                 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1082
1083                 if (rw > LLCP_MAX_RW)
1084                         return -EINVAL;
1085         }
1086
1087         if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1088                 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1089
1090                 if (miux > LLCP_MAX_MIUX)
1091                         return -EINVAL;
1092         }
1093
1094         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1095
1096         dev = nfc_get_device(idx);
1097         if (!dev)
1098                 return -ENODEV;
1099
1100         device_lock(&dev->dev);
1101
1102         local = nfc_llcp_find_local(dev);
1103         if (!local) {
1104                 rc = -ENODEV;
1105                 goto exit;
1106         }
1107
1108         if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1109                 if (dev->dep_link_up) {
1110                         rc = -EINPROGRESS;
1111                         goto put_local;
1112                 }
1113
1114                 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1115         }
1116
1117         if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1118                 local->rw = rw;
1119
1120         if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1121                 local->miux = cpu_to_be16(miux);
1122
1123 put_local:
1124         nfc_llcp_local_put(local);
1125
1126 exit:
1127         device_unlock(&dev->dev);
1128
1129         nfc_put_device(dev);
1130
1131         return rc;
1132 }
1133
1134 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1135 {
1136         struct nfc_dev *dev;
1137         struct nfc_llcp_local *local;
1138         struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1139         u32 idx;
1140         u8 tid;
1141         char *uri;
1142         int rc = 0, rem;
1143         size_t uri_len, tlvs_len;
1144         struct hlist_head sdreq_list;
1145         struct nfc_llcp_sdp_tlv *sdreq;
1146
1147         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1148             !info->attrs[NFC_ATTR_LLC_SDP])
1149                 return -EINVAL;
1150
1151         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1152
1153         dev = nfc_get_device(idx);
1154         if (!dev)
1155                 return -ENODEV;
1156
1157         device_lock(&dev->dev);
1158
1159         if (dev->dep_link_up == false) {
1160                 rc = -ENOLINK;
1161                 goto exit;
1162         }
1163
1164         local = nfc_llcp_find_local(dev);
1165         if (!local) {
1166                 rc = -ENODEV;
1167                 goto exit;
1168         }
1169
1170         INIT_HLIST_HEAD(&sdreq_list);
1171
1172         tlvs_len = 0;
1173
1174         nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1175                 rc = nla_parse_nested_deprecated(sdp_attrs, NFC_SDP_ATTR_MAX,
1176                                                  attr, nfc_sdp_genl_policy,
1177                                                  info->extack);
1178
1179                 if (rc != 0) {
1180                         rc = -EINVAL;
1181                         goto put_local;
1182                 }
1183
1184                 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1185                         continue;
1186
1187                 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1188                 if (uri_len == 0)
1189                         continue;
1190
1191                 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1192                 if (uri == NULL || *uri == 0)
1193                         continue;
1194
1195                 tid = local->sdreq_next_tid++;
1196
1197                 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1198                 if (sdreq == NULL) {
1199                         rc = -ENOMEM;
1200                         goto put_local;
1201                 }
1202
1203                 tlvs_len += sdreq->tlv_len;
1204
1205                 hlist_add_head(&sdreq->node, &sdreq_list);
1206         }
1207
1208         if (hlist_empty(&sdreq_list)) {
1209                 rc = -EINVAL;
1210                 goto put_local;
1211         }
1212
1213         rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1214
1215 put_local:
1216         nfc_llcp_local_put(local);
1217
1218 exit:
1219         device_unlock(&dev->dev);
1220
1221         nfc_put_device(dev);
1222
1223         return rc;
1224 }
1225
1226 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1227 {
1228         struct nfc_dev *dev;
1229         int rc;
1230         u32 idx;
1231         char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1232
1233         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || !info->attrs[NFC_ATTR_FIRMWARE_NAME])
1234                 return -EINVAL;
1235
1236         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1237
1238         dev = nfc_get_device(idx);
1239         if (!dev)
1240                 return -ENODEV;
1241
1242         nla_strscpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1243                     sizeof(firmware_name));
1244
1245         rc = nfc_fw_download(dev, firmware_name);
1246
1247         nfc_put_device(dev);
1248         return rc;
1249 }
1250
1251 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1252                               u32 result)
1253 {
1254         struct sk_buff *msg;
1255         void *hdr;
1256
1257         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1258         if (!msg)
1259                 return -ENOMEM;
1260
1261         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1262                           NFC_CMD_FW_DOWNLOAD);
1263         if (!hdr)
1264                 goto free_msg;
1265
1266         if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1267             nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1268             nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1269                 goto nla_put_failure;
1270
1271         genlmsg_end(msg, hdr);
1272
1273         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
1274
1275         return 0;
1276
1277 nla_put_failure:
1278 free_msg:
1279         nlmsg_free(msg);
1280         return -EMSGSIZE;
1281 }
1282
1283 static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1284 {
1285         struct nfc_dev *dev;
1286         int rc;
1287         u32 idx, se_idx;
1288
1289         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1290             !info->attrs[NFC_ATTR_SE_INDEX])
1291                 return -EINVAL;
1292
1293         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1294         se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1295
1296         dev = nfc_get_device(idx);
1297         if (!dev)
1298                 return -ENODEV;
1299
1300         rc = nfc_enable_se(dev, se_idx);
1301
1302         nfc_put_device(dev);
1303         return rc;
1304 }
1305
1306 static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1307 {
1308         struct nfc_dev *dev;
1309         int rc;
1310         u32 idx, se_idx;
1311
1312         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1313             !info->attrs[NFC_ATTR_SE_INDEX])
1314                 return -EINVAL;
1315
1316         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1317         se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1318
1319         dev = nfc_get_device(idx);
1320         if (!dev)
1321                 return -ENODEV;
1322
1323         rc = nfc_disable_se(dev, se_idx);
1324
1325         nfc_put_device(dev);
1326         return rc;
1327 }
1328
1329 static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1330                                 u32 portid, u32 seq,
1331                                 struct netlink_callback *cb,
1332                                 int flags)
1333 {
1334         void *hdr;
1335         struct nfc_se *se, *n;
1336
1337         list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1338                 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1339                                   NFC_CMD_GET_SE);
1340                 if (!hdr)
1341                         goto nla_put_failure;
1342
1343                 if (cb)
1344                         genl_dump_check_consistent(cb, hdr);
1345
1346                 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1347                     nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1348                     nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1349                         goto nla_put_failure;
1350
1351                 genlmsg_end(msg, hdr);
1352         }
1353
1354         return 0;
1355
1356 nla_put_failure:
1357         genlmsg_cancel(msg, hdr);
1358         return -EMSGSIZE;
1359 }
1360
1361 static int nfc_genl_dump_ses(struct sk_buff *skb,
1362                                  struct netlink_callback *cb)
1363 {
1364         struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1365         struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1366         bool first_call = false;
1367
1368         if (!iter) {
1369                 first_call = true;
1370                 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1371                 if (!iter)
1372                         return -ENOMEM;
1373                 cb->args[0] = (long) iter;
1374         }
1375
1376         mutex_lock(&nfc_devlist_mutex);
1377
1378         cb->seq = nfc_devlist_generation;
1379
1380         if (first_call) {
1381                 nfc_device_iter_init(iter);
1382                 dev = nfc_device_iter_next(iter);
1383         }
1384
1385         while (dev) {
1386                 int rc;
1387
1388                 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1389                                           cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1390                 if (rc < 0)
1391                         break;
1392
1393                 dev = nfc_device_iter_next(iter);
1394         }
1395
1396         mutex_unlock(&nfc_devlist_mutex);
1397
1398         cb->args[1] = (long) dev;
1399
1400         return skb->len;
1401 }
1402
1403 static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1404 {
1405         struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1406
1407         if (iter) {
1408                 nfc_device_iter_exit(iter);
1409                 kfree(iter);
1410         }
1411
1412         return 0;
1413 }
1414
1415 static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1416                      u8 *apdu, size_t apdu_length,
1417                      se_io_cb_t cb, void *cb_context)
1418 {
1419         struct nfc_se *se;
1420         int rc;
1421
1422         pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1423
1424         device_lock(&dev->dev);
1425
1426         if (!device_is_registered(&dev->dev)) {
1427                 rc = -ENODEV;
1428                 goto error;
1429         }
1430
1431         if (!dev->dev_up) {
1432                 rc = -ENODEV;
1433                 goto error;
1434         }
1435
1436         if (!dev->ops->se_io) {
1437                 rc = -EOPNOTSUPP;
1438                 goto error;
1439         }
1440
1441         se = nfc_find_se(dev, se_idx);
1442         if (!se) {
1443                 rc = -EINVAL;
1444                 goto error;
1445         }
1446
1447         if (se->state != NFC_SE_ENABLED) {
1448                 rc = -ENODEV;
1449                 goto error;
1450         }
1451
1452         rc = dev->ops->se_io(dev, se_idx, apdu,
1453                         apdu_length, cb, cb_context);
1454
1455         device_unlock(&dev->dev);
1456         return rc;
1457
1458 error:
1459         device_unlock(&dev->dev);
1460         kfree(cb_context);
1461         return rc;
1462 }
1463
1464 struct se_io_ctx {
1465         u32 dev_idx;
1466         u32 se_idx;
1467 };
1468
1469 static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1470 {
1471         struct se_io_ctx *ctx = context;
1472         struct sk_buff *msg;
1473         void *hdr;
1474
1475         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1476         if (!msg) {
1477                 kfree(ctx);
1478                 return;
1479         }
1480
1481         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1482                           NFC_CMD_SE_IO);
1483         if (!hdr)
1484                 goto free_msg;
1485
1486         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1487             nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1488             nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1489                 goto nla_put_failure;
1490
1491         genlmsg_end(msg, hdr);
1492
1493         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1494
1495         kfree(ctx);
1496
1497         return;
1498
1499 nla_put_failure:
1500 free_msg:
1501         nlmsg_free(msg);
1502         kfree(ctx);
1503
1504         return;
1505 }
1506
1507 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1508 {
1509         struct nfc_dev *dev;
1510         struct se_io_ctx *ctx;
1511         u32 dev_idx, se_idx;
1512         u8 *apdu;
1513         size_t apdu_len;
1514         int rc;
1515
1516         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1517             !info->attrs[NFC_ATTR_SE_INDEX] ||
1518             !info->attrs[NFC_ATTR_SE_APDU])
1519                 return -EINVAL;
1520
1521         dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1522         se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1523
1524         dev = nfc_get_device(dev_idx);
1525         if (!dev)
1526                 return -ENODEV;
1527
1528         if (!dev->ops || !dev->ops->se_io) {
1529                 rc = -EOPNOTSUPP;
1530                 goto put_dev;
1531         }
1532
1533         apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1534         if (apdu_len == 0) {
1535                 rc = -EINVAL;
1536                 goto put_dev;
1537         }
1538
1539         apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1540         if (!apdu) {
1541                 rc = -EINVAL;
1542                 goto put_dev;
1543         }
1544
1545         ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1546         if (!ctx) {
1547                 rc = -ENOMEM;
1548                 goto put_dev;
1549         }
1550
1551         ctx->dev_idx = dev_idx;
1552         ctx->se_idx = se_idx;
1553
1554         rc = nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1555
1556 put_dev:
1557         nfc_put_device(dev);
1558         return rc;
1559 }
1560
1561 static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1562                                struct genl_info *info)
1563 {
1564         struct nfc_dev *dev;
1565         const struct nfc_vendor_cmd *cmd;
1566         u32 dev_idx, vid, subcmd;
1567         u8 *data;
1568         size_t data_len;
1569         int i, err;
1570
1571         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1572             !info->attrs[NFC_ATTR_VENDOR_ID] ||
1573             !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1574                 return -EINVAL;
1575
1576         dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1577         vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1578         subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1579
1580         dev = nfc_get_device(dev_idx);
1581         if (!dev)
1582                 return -ENODEV;
1583
1584         if (!dev->vendor_cmds || !dev->n_vendor_cmds) {
1585                 err = -ENODEV;
1586                 goto put_dev;
1587         }
1588
1589         if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1590                 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1591                 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1592                 if (data_len == 0) {
1593                         err = -EINVAL;
1594                         goto put_dev;
1595                 }
1596         } else {
1597                 data = NULL;
1598                 data_len = 0;
1599         }
1600
1601         for (i = 0; i < dev->n_vendor_cmds; i++) {
1602                 cmd = &dev->vendor_cmds[i];
1603
1604                 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1605                         continue;
1606
1607                 dev->cur_cmd_info = info;
1608                 err = cmd->doit(dev, data, data_len);
1609                 dev->cur_cmd_info = NULL;
1610                 goto put_dev;
1611         }
1612
1613         err = -EOPNOTSUPP;
1614
1615 put_dev:
1616         nfc_put_device(dev);
1617         return err;
1618 }
1619
1620 /* message building helper */
1621 static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1622                                 int flags, u8 cmd)
1623 {
1624         /* since there is no private header just add the generic one */
1625         return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1626 }
1627
1628 static struct sk_buff *
1629 __nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1630                            u32 portid, u32 seq,
1631                            enum nfc_attrs attr,
1632                            u32 oui, u32 subcmd, gfp_t gfp)
1633 {
1634         struct sk_buff *skb;
1635         void *hdr;
1636
1637         skb = nlmsg_new(approxlen + 100, gfp);
1638         if (!skb)
1639                 return NULL;
1640
1641         hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1642         if (!hdr) {
1643                 kfree_skb(skb);
1644                 return NULL;
1645         }
1646
1647         if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1648                 goto nla_put_failure;
1649         if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1650                 goto nla_put_failure;
1651         if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1652                 goto nla_put_failure;
1653
1654         ((void **)skb->cb)[0] = dev;
1655         ((void **)skb->cb)[1] = hdr;
1656
1657         return skb;
1658
1659 nla_put_failure:
1660         kfree_skb(skb);
1661         return NULL;
1662 }
1663
1664 struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1665                                                  enum nfc_attrs attr,
1666                                                  u32 oui, u32 subcmd,
1667                                                  int approxlen)
1668 {
1669         if (WARN_ON(!dev->cur_cmd_info))
1670                 return NULL;
1671
1672         return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1673                                           dev->cur_cmd_info->snd_portid,
1674                                           dev->cur_cmd_info->snd_seq, attr,
1675                                           oui, subcmd, GFP_KERNEL);
1676 }
1677 EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1678
1679 int nfc_vendor_cmd_reply(struct sk_buff *skb)
1680 {
1681         struct nfc_dev *dev = ((void **)skb->cb)[0];
1682         void *hdr = ((void **)skb->cb)[1];
1683
1684         /* clear CB data for netlink core to own from now on */
1685         memset(skb->cb, 0, sizeof(skb->cb));
1686
1687         if (WARN_ON(!dev->cur_cmd_info)) {
1688                 kfree_skb(skb);
1689                 return -EINVAL;
1690         }
1691
1692         genlmsg_end(skb, hdr);
1693         return genlmsg_reply(skb, dev->cur_cmd_info);
1694 }
1695 EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1696
1697 static const struct genl_ops nfc_genl_ops[] = {
1698         {
1699                 .cmd = NFC_CMD_GET_DEVICE,
1700                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1701                 .doit = nfc_genl_get_device,
1702                 .dumpit = nfc_genl_dump_devices,
1703                 .done = nfc_genl_dump_devices_done,
1704         },
1705         {
1706                 .cmd = NFC_CMD_DEV_UP,
1707                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1708                 .doit = nfc_genl_dev_up,
1709                 .flags = GENL_ADMIN_PERM,
1710         },
1711         {
1712                 .cmd = NFC_CMD_DEV_DOWN,
1713                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1714                 .doit = nfc_genl_dev_down,
1715                 .flags = GENL_ADMIN_PERM,
1716         },
1717         {
1718                 .cmd = NFC_CMD_START_POLL,
1719                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1720                 .doit = nfc_genl_start_poll,
1721                 .flags = GENL_ADMIN_PERM,
1722         },
1723         {
1724                 .cmd = NFC_CMD_STOP_POLL,
1725                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1726                 .doit = nfc_genl_stop_poll,
1727                 .flags = GENL_ADMIN_PERM,
1728         },
1729         {
1730                 .cmd = NFC_CMD_DEP_LINK_UP,
1731                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1732                 .doit = nfc_genl_dep_link_up,
1733                 .flags = GENL_ADMIN_PERM,
1734         },
1735         {
1736                 .cmd = NFC_CMD_DEP_LINK_DOWN,
1737                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1738                 .doit = nfc_genl_dep_link_down,
1739                 .flags = GENL_ADMIN_PERM,
1740         },
1741         {
1742                 .cmd = NFC_CMD_GET_TARGET,
1743                 .validate = GENL_DONT_VALIDATE_STRICT |
1744                             GENL_DONT_VALIDATE_DUMP_STRICT,
1745                 .dumpit = nfc_genl_dump_targets,
1746                 .done = nfc_genl_dump_targets_done,
1747         },
1748         {
1749                 .cmd = NFC_CMD_LLC_GET_PARAMS,
1750                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1751                 .doit = nfc_genl_llc_get_params,
1752         },
1753         {
1754                 .cmd = NFC_CMD_LLC_SET_PARAMS,
1755                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1756                 .doit = nfc_genl_llc_set_params,
1757                 .flags = GENL_ADMIN_PERM,
1758         },
1759         {
1760                 .cmd = NFC_CMD_LLC_SDREQ,
1761                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1762                 .doit = nfc_genl_llc_sdreq,
1763                 .flags = GENL_ADMIN_PERM,
1764         },
1765         {
1766                 .cmd = NFC_CMD_FW_DOWNLOAD,
1767                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1768                 .doit = nfc_genl_fw_download,
1769                 .flags = GENL_ADMIN_PERM,
1770         },
1771         {
1772                 .cmd = NFC_CMD_ENABLE_SE,
1773                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1774                 .doit = nfc_genl_enable_se,
1775                 .flags = GENL_ADMIN_PERM,
1776         },
1777         {
1778                 .cmd = NFC_CMD_DISABLE_SE,
1779                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1780                 .doit = nfc_genl_disable_se,
1781                 .flags = GENL_ADMIN_PERM,
1782         },
1783         {
1784                 .cmd = NFC_CMD_GET_SE,
1785                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1786                 .dumpit = nfc_genl_dump_ses,
1787                 .done = nfc_genl_dump_ses_done,
1788         },
1789         {
1790                 .cmd = NFC_CMD_SE_IO,
1791                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1792                 .doit = nfc_genl_se_io,
1793                 .flags = GENL_ADMIN_PERM,
1794         },
1795         {
1796                 .cmd = NFC_CMD_ACTIVATE_TARGET,
1797                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1798                 .doit = nfc_genl_activate_target,
1799                 .flags = GENL_ADMIN_PERM,
1800         },
1801         {
1802                 .cmd = NFC_CMD_VENDOR,
1803                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1804                 .doit = nfc_genl_vendor_cmd,
1805                 .flags = GENL_ADMIN_PERM,
1806         },
1807         {
1808                 .cmd = NFC_CMD_DEACTIVATE_TARGET,
1809                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1810                 .doit = nfc_genl_deactivate_target,
1811                 .flags = GENL_ADMIN_PERM,
1812         },
1813 };
1814
1815 static struct genl_family nfc_genl_family __ro_after_init = {
1816         .hdrsize = 0,
1817         .name = NFC_GENL_NAME,
1818         .version = NFC_GENL_VERSION,
1819         .maxattr = NFC_ATTR_MAX,
1820         .policy = nfc_genl_policy,
1821         .module = THIS_MODULE,
1822         .ops = nfc_genl_ops,
1823         .n_ops = ARRAY_SIZE(nfc_genl_ops),
1824         .resv_start_op = NFC_CMD_DEACTIVATE_TARGET + 1,
1825         .mcgrps = nfc_genl_mcgrps,
1826         .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
1827 };
1828
1829
1830 struct urelease_work {
1831         struct  work_struct w;
1832         u32     portid;
1833 };
1834
1835 static void nfc_urelease_event_work(struct work_struct *work)
1836 {
1837         struct urelease_work *w = container_of(work, struct urelease_work, w);
1838         struct class_dev_iter iter;
1839         struct nfc_dev *dev;
1840
1841         pr_debug("portid %d\n", w->portid);
1842
1843         mutex_lock(&nfc_devlist_mutex);
1844
1845         nfc_device_iter_init(&iter);
1846         dev = nfc_device_iter_next(&iter);
1847
1848         while (dev) {
1849                 mutex_lock(&dev->genl_data.genl_data_mutex);
1850
1851                 if (dev->genl_data.poll_req_portid == w->portid) {
1852                         nfc_stop_poll(dev);
1853                         dev->genl_data.poll_req_portid = 0;
1854                 }
1855
1856                 mutex_unlock(&dev->genl_data.genl_data_mutex);
1857
1858                 dev = nfc_device_iter_next(&iter);
1859         }
1860
1861         nfc_device_iter_exit(&iter);
1862
1863         mutex_unlock(&nfc_devlist_mutex);
1864
1865         kfree(w);
1866 }
1867
1868 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1869                                  unsigned long event, void *ptr)
1870 {
1871         struct netlink_notify *n = ptr;
1872         struct urelease_work *w;
1873
1874         if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1875                 goto out;
1876
1877         pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1878
1879         w = kmalloc(sizeof(*w), GFP_ATOMIC);
1880         if (w) {
1881                 INIT_WORK(&w->w, nfc_urelease_event_work);
1882                 w->portid = n->portid;
1883                 schedule_work(&w->w);
1884         }
1885
1886 out:
1887         return NOTIFY_DONE;
1888 }
1889
1890 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1891 {
1892         genl_data->poll_req_portid = 0;
1893         mutex_init(&genl_data->genl_data_mutex);
1894 }
1895
1896 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1897 {
1898         mutex_destroy(&genl_data->genl_data_mutex);
1899 }
1900
1901 static struct notifier_block nl_notifier = {
1902         .notifier_call  = nfc_genl_rcv_nl_event,
1903 };
1904
1905 /**
1906  * nfc_genl_init() - Initialize netlink interface
1907  *
1908  * This initialization function registers the nfc netlink family.
1909  */
1910 int __init nfc_genl_init(void)
1911 {
1912         int rc;
1913
1914         rc = genl_register_family(&nfc_genl_family);
1915         if (rc)
1916                 return rc;
1917
1918         netlink_register_notifier(&nl_notifier);
1919
1920         return 0;
1921 }
1922
1923 /**
1924  * nfc_genl_exit() - Deinitialize netlink interface
1925  *
1926  * This exit function unregisters the nfc netlink family.
1927  */
1928 void nfc_genl_exit(void)
1929 {
1930         netlink_unregister_notifier(&nl_notifier);
1931         genl_unregister_family(&nfc_genl_family);
1932 }