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TOMOYO Linux Cross Reference
Linux/net/nfc/netlink.c

Version: ~ [ linux-5.6 ] ~ [ linux-5.5.13 ] ~ [ linux-5.4.28 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.113 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.174 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.217 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.217 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.82 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

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

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