net/nfc/netlink.c

   1 /*
   2  * Copyright (C) 2011 Instituto Nokia de Tecnologia
   3  *
   4  * Authors:
   5  *    Lauro Ramos Venancio <lauro.venancio@openbossa.org>
   6  *    Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
   7  *
   8  * 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 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
 556                                 u32 portid, u32 seq,
 557                                 struct netlink_callback *cb,
 558                                 int flags)
 559 {
 560         void *hdr;
 561
 562         hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
 563                           NFC_CMD_GET_DEVICE);
 564         if (!hdr)
 565                 return -EMSGSIZE;
 566
 567         if (cb)
 568                 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
 569
 570         if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
 571             nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
 572             nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
 573             nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
 574             nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
 575                 goto nla_put_failure;
 576
 577         genlmsg_end(msg, hdr);
 578         return 0;
 579
 580 nla_put_failure:
 581         genlmsg_cancel(msg, hdr);
 582         return -EMSGSIZE;
 583 }
 584
 585 static int nfc_genl_dump_devices(struct sk_buff *skb,
 586                                  struct netlink_callback *cb)
 587 {
 588         struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
 589         struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
 590         bool first_call = false;
 591
 592         if (!iter) {
 593                 first_call = true;
 594                 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
 595                 if (!iter)
 596                         return -ENOMEM;
 597                 cb->args[0] = (long) iter;
 598         }
 599
 600         mutex_lock(&nfc_devlist_mutex);
 601
 602         cb->seq = nfc_devlist_generation;
 603
 604         if (first_call) {
 605                 nfc_device_iter_init(iter);
 606                 dev = nfc_device_iter_next(iter);
 607         }
 608
 609         while (dev) {
 610                 int rc;
 611
 612                 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
 613                                           cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
 614                 if (rc < 0)
 615                         break;
 616
 617                 dev = nfc_device_iter_next(iter);
 618         }
 619
 620         mutex_unlock(&nfc_devlist_mutex);
 621
 622         cb->args[1] = (long) dev;
 623
 624         return skb->len;
 625 }
 626
 627 static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
 628 {
 629         struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
 630
 631         nfc_device_iter_exit(iter);
 632         kfree(iter);
 633
 634         return 0;
 635 }
 636
 637 int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
 638                                u8 comm_mode, u8 rf_mode)
 639 {
 640         struct sk_buff *msg;
 641         void *hdr;
 642
 643         pr_debug("DEP link is up\n");
 644
 645         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 646         if (!msg)
 647                 return -ENOMEM;
 648
 649         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
 650         if (!hdr)
 651                 goto free_msg;
 652
 653         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 654                 goto nla_put_failure;
 655         if (rf_mode == NFC_RF_INITIATOR &&
 656             nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
 657                 goto nla_put_failure;
 658         if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
 659             nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
 660                 goto nla_put_failure;
 661
 662         genlmsg_end(msg, hdr);
 663
 664         dev->dep_link_up = true;
 665
 666         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
 667
 668         return 0;
 669
 670 nla_put_failure:
 671         genlmsg_cancel(msg, hdr);
 672 free_msg:
 673         nlmsg_free(msg);
 674         return -EMSGSIZE;
 675 }
 676
 677 int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
 678 {
 679         struct sk_buff *msg;
 680         void *hdr;
 681
 682         pr_debug("DEP link is down\n");
 683
 684         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 685         if (!msg)
 686                 return -ENOMEM;
 687
 688         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 689                           NFC_CMD_DEP_LINK_DOWN);
 690         if (!hdr)
 691                 goto free_msg;
 692
 693         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 694                 goto nla_put_failure;
 695
 696         genlmsg_end(msg, hdr);
 697
 698         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
 699
 700         return 0;
 701
 702 nla_put_failure:
 703         genlmsg_cancel(msg, hdr);
 704 free_msg:
 705         nlmsg_free(msg);
 706         return -EMSGSIZE;
 707 }
 708
 709 static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
 710 {
 711         struct sk_buff *msg;
 712         struct nfc_dev *dev;
 713         u32 idx;
 714         int rc = -ENOBUFS;
 715
 716         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 717                 return -EINVAL;
 718
 719         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 720
 721         dev = nfc_get_device(idx);
 722         if (!dev)
 723                 return -ENODEV;
 724
 725         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 726         if (!msg) {
 727                 rc = -ENOMEM;
 728                 goto out_putdev;
 729         }
 730
 731         rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
 732                                   NULL, 0);
 733         if (rc < 0)
 734                 goto out_free;
 735
 736         nfc_put_device(dev);
 737
 738         return genlmsg_reply(msg, info);
 739
 740 out_free:
 741         nlmsg_free(msg);
 742 out_putdev:
 743         nfc_put_device(dev);
 744         return rc;
 745 }
 746
 747 static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
 748 {
 749         struct nfc_dev *dev;
 750         int rc;
 751         u32 idx;
 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         rc = nfc_dev_up(dev);
 763
 764         nfc_put_device(dev);
 765         return rc;
 766 }
 767
 768 static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
 769 {
 770         struct nfc_dev *dev;
 771         int rc;
 772         u32 idx;
 773
 774         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 775                 return -EINVAL;
 776
 777         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 778
 779         dev = nfc_get_device(idx);
 780         if (!dev)
 781                 return -ENODEV;
 782
 783         rc = nfc_dev_down(dev);
 784
 785         nfc_put_device(dev);
 786         return rc;
 787 }
 788
 789 static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
 790 {
 791         struct nfc_dev *dev;
 792         int rc;
 793         u32 idx;
 794         u32 im_protocols = 0, tm_protocols = 0;
 795
 796         pr_debug("Poll start\n");
 797
 798         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
 799             ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
 800               !info->attrs[NFC_ATTR_PROTOCOLS]) &&
 801               !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
 802                 return -EINVAL;
 803
 804         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 805
 806         if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
 807                 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
 808
 809         if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
 810                 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
 811         else if (info->attrs[NFC_ATTR_PROTOCOLS])
 812                 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
 813
 814         dev = nfc_get_device(idx);
 815         if (!dev)
 816                 return -ENODEV;
 817
 818         mutex_lock(&dev->genl_data.genl_data_mutex);
 819
 820         rc = nfc_start_poll(dev, im_protocols, tm_protocols);
 821         if (!rc)
 822                 dev->genl_data.poll_req_portid = info->snd_portid;
 823
 824         mutex_unlock(&dev->genl_data.genl_data_mutex);
 825
 826         nfc_put_device(dev);
 827         return rc;
 828 }
 829
 830 static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
 831 {
 832         struct nfc_dev *dev;
 833         int rc;
 834         u32 idx;
 835
 836         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 837                 return -EINVAL;
 838
 839         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 840
 841         dev = nfc_get_device(idx);
 842         if (!dev)
 843                 return -ENODEV;
 844
 845         device_lock(&dev->dev);
 846
 847         if (!dev->polling) {
 848                 device_unlock(&dev->dev);
 849                 return -EINVAL;
 850         }
 851
 852         device_unlock(&dev->dev);
 853
 854         mutex_lock(&dev->genl_data.genl_data_mutex);
 855
 856         if (dev->genl_data.poll_req_portid != info->snd_portid) {
 857                 rc = -EBUSY;
 858                 goto out;
 859         }
 860
 861         rc = nfc_stop_poll(dev);
 862         dev->genl_data.poll_req_portid = 0;
 863
 864 out:
 865         mutex_unlock(&dev->genl_data.genl_data_mutex);
 866         nfc_put_device(dev);
 867         return rc;
 868 }
 869
 870 static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
 871 {
 872         struct nfc_dev *dev;
 873         u32 device_idx, target_idx, protocol;
 874         int rc;
 875
 876         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 877                 return -EINVAL;
 878
 879         device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 880
 881         dev = nfc_get_device(device_idx);
 882         if (!dev)
 883                 return -ENODEV;
 884
 885         target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
 886         protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
 887
 888         nfc_deactivate_target(dev, target_idx);
 889         rc = nfc_activate_target(dev, target_idx, protocol);
 890
 891         nfc_put_device(dev);
 892         return 0;
 893 }
 894
 895 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
 896 {
 897         struct nfc_dev *dev;
 898         int rc, tgt_idx;
 899         u32 idx;
 900         u8 comm;
 901
 902         pr_debug("DEP link up\n");
 903
 904         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
 905             !info->attrs[NFC_ATTR_COMM_MODE])
 906                 return -EINVAL;
 907
 908         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 909         if (!info->attrs[NFC_ATTR_TARGET_INDEX])
 910                 tgt_idx = NFC_TARGET_IDX_ANY;
 911         else
 912                 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
 913
 914         comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
 915
 916         if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
 917                 return -EINVAL;
 918
 919         dev = nfc_get_device(idx);
 920         if (!dev)
 921                 return -ENODEV;
 922
 923         rc = nfc_dep_link_up(dev, tgt_idx, comm);
 924
 925         nfc_put_device(dev);
 926
 927         return rc;
 928 }
 929
 930 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
 931 {
 932         struct nfc_dev *dev;
 933         int rc;
 934         u32 idx;
 935
 936         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 937                 return -EINVAL;
 938
 939         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 940
 941         dev = nfc_get_device(idx);
 942         if (!dev)
 943                 return -ENODEV;
 944
 945         rc = nfc_dep_link_down(dev);
 946
 947         nfc_put_device(dev);
 948         return rc;
 949 }
 950
 951 static int nfc_genl_send_params(struct sk_buff *msg,
 952                                 struct nfc_llcp_local *local,
 953                                 u32 portid, u32 seq)
 954 {
 955         void *hdr;
 956
 957         hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
 958                           NFC_CMD_LLC_GET_PARAMS);
 959         if (!hdr)
 960                 return -EMSGSIZE;
 961
 962         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
 963             nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
 964             nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
 965             nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
 966                 goto nla_put_failure;
 967
 968         genlmsg_end(msg, hdr);
 969         return 0;
 970
 971 nla_put_failure:
 972
 973         genlmsg_cancel(msg, hdr);
 974         return -EMSGSIZE;
 975 }
 976
 977 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
 978 {
 979         struct nfc_dev *dev;
 980         struct nfc_llcp_local *local;
 981         int rc = 0;
 982         struct sk_buff *msg = NULL;
 983         u32 idx;
 984
 985         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 986                 return -EINVAL;
 987
 988         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 989
 990         dev = nfc_get_device(idx);
 991         if (!dev)
 992                 return -ENODEV;
 993
 994         device_lock(&dev->dev);
 995
 996         local = nfc_llcp_find_local(dev);
 997         if (!local) {
 998                 rc = -ENODEV;
 999                 goto exit;
1000         }
1001
1002         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1003         if (!msg) {
1004                 rc = -ENOMEM;
1005                 goto exit;
1006         }
1007
1008         rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1009
1010 exit:
1011         device_unlock(&dev->dev);
1012
1013         nfc_put_device(dev);
1014
1015         if (rc < 0) {
1016                 if (msg)
1017                         nlmsg_free(msg);
1018
1019                 return rc;
1020         }
1021
1022         return genlmsg_reply(msg, info);
1023 }
1024
1025 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1026 {
1027         struct nfc_dev *dev;
1028         struct nfc_llcp_local *local;
1029         u8 rw = 0;
1030         u16 miux = 0;
1031         u32 idx;
1032         int rc = 0;
1033
1034         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1035             (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1036              !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1037              !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1038                 return -EINVAL;
1039
1040         if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1041                 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1042
1043                 if (rw > LLCP_MAX_RW)
1044                         return -EINVAL;
1045         }
1046
1047         if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1048                 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1049
1050                 if (miux > LLCP_MAX_MIUX)
1051                         return -EINVAL;
1052         }
1053
1054         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1055
1056         dev = nfc_get_device(idx);
1057         if (!dev)
1058                 return -ENODEV;
1059
1060         device_lock(&dev->dev);
1061
1062         local = nfc_llcp_find_local(dev);
1063         if (!local) {
1064                 nfc_put_device(dev);
1065                 rc = -ENODEV;
1066                 goto exit;
1067         }
1068
1069         if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1070                 if (dev->dep_link_up) {
1071                         rc = -EINPROGRESS;
1072                         goto exit;
1073                 }
1074
1075                 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1076         }
1077
1078         if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1079                 local->rw = rw;
1080
1081         if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1082                 local->miux = cpu_to_be16(miux);
1083
1084 exit:
1085         device_unlock(&dev->dev);
1086
1087         nfc_put_device(dev);
1088
1089         return rc;
1090 }
1091
1092 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1093 {
1094         struct nfc_dev *dev;
1095         struct nfc_llcp_local *local;
1096         struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1097         u32 idx;
1098         u8 tid;
1099         char *uri;
1100         int rc = 0, rem;
1101         size_t uri_len, tlvs_len;
1102         struct hlist_head sdreq_list;
1103         struct nfc_llcp_sdp_tlv *sdreq;
1104
1105         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1106             !info->attrs[NFC_ATTR_LLC_SDP])
1107                 return -EINVAL;
1108
1109         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1110
1111         dev = nfc_get_device(idx);
1112         if (!dev) {
1113                 rc = -ENODEV;
1114                 goto exit;
1115         }
1116
1117         device_lock(&dev->dev);
1118
1119         if (dev->dep_link_up == false) {
1120                 rc = -ENOLINK;
1121                 goto exit;
1122         }
1123
1124         local = nfc_llcp_find_local(dev);
1125         if (!local) {
1126                 nfc_put_device(dev);
1127                 rc = -ENODEV;
1128                 goto exit;
1129         }
1130
1131         INIT_HLIST_HEAD(&sdreq_list);
1132
1133         tlvs_len = 0;
1134
1135         nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1136                 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
1137                                       nfc_sdp_genl_policy);
1138
1139                 if (rc != 0) {
1140                         rc = -EINVAL;
1141                         goto exit;
1142                 }
1143
1144                 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1145                         continue;
1146
1147                 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1148                 if (uri_len == 0)
1149                         continue;
1150
1151                 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1152                 if (uri == NULL || *uri == 0)
1153                         continue;
1154
1155                 tid = local->sdreq_next_tid++;
1156
1157                 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1158                 if (sdreq == NULL) {
1159                         rc = -ENOMEM;
1160                         goto exit;
1161                 }
1162
1163                 tlvs_len += sdreq->tlv_len;
1164
1165                 hlist_add_head(&sdreq->node, &sdreq_list);
1166         }
1167
1168         if (hlist_empty(&sdreq_list)) {
1169                 rc = -EINVAL;
1170                 goto exit;
1171         }
1172
1173         rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1174 exit:
1175         device_unlock(&dev->dev);
1176
1177         nfc_put_device(dev);
1178
1179         return rc;
1180 }
1181
1182 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1183 {
1184         struct nfc_dev *dev;
1185         int rc;
1186         u32 idx;
1187         char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1188
1189         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1190                 return -EINVAL;
1191
1192         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1193
1194         dev = nfc_get_device(idx);
1195         if (!dev)
1196                 return -ENODEV;
1197
1198         nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1199                     sizeof(firmware_name));
1200
1201         rc = nfc_fw_download(dev, firmware_name);
1202
1203         nfc_put_device(dev);
1204         return rc;
1205 }
1206
1207 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1208                               u32 result)
1209 {
1210         struct sk_buff *msg;
1211         void *hdr;
1212
1213         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1214         if (!msg)
1215                 return -ENOMEM;
1216
1217         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1218                           NFC_CMD_FW_DOWNLOAD);
1219         if (!hdr)
1220                 goto free_msg;
1221
1222         if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1223             nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1224             nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1225                 goto nla_put_failure;
1226
1227         genlmsg_end(msg, hdr);
1228
1229         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1230
1231         return 0;
1232
1233 nla_put_failure:
1234         genlmsg_cancel(msg, hdr);
1235 free_msg:
1236         nlmsg_free(msg);
1237         return -EMSGSIZE;
1238 }
1239
1240 static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1241 {
1242         struct nfc_dev *dev;
1243         int rc;
1244         u32 idx, se_idx;
1245
1246         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1247             !info->attrs[NFC_ATTR_SE_INDEX])
1248                 return -EINVAL;
1249
1250         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1251         se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1252
1253         dev = nfc_get_device(idx);
1254         if (!dev)
1255                 return -ENODEV;
1256
1257         rc = nfc_enable_se(dev, se_idx);
1258
1259         nfc_put_device(dev);
1260         return rc;
1261 }
1262
1263 static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1264 {
1265         struct nfc_dev *dev;
1266         int rc;
1267         u32 idx, se_idx;
1268
1269         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1270             !info->attrs[NFC_ATTR_SE_INDEX])
1271                 return -EINVAL;
1272
1273         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1274         se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1275
1276         dev = nfc_get_device(idx);
1277         if (!dev)
1278                 return -ENODEV;
1279
1280         rc = nfc_disable_se(dev, se_idx);
1281
1282         nfc_put_device(dev);
1283         return rc;
1284 }
1285
1286 static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1287                                 u32 portid, u32 seq,
1288                                 struct netlink_callback *cb,
1289                                 int flags)
1290 {
1291         void *hdr;
1292         struct nfc_se *se, *n;
1293
1294         list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1295                 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1296                                   NFC_CMD_GET_SE);
1297                 if (!hdr)
1298                         goto nla_put_failure;
1299
1300                 if (cb)
1301                         genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
1302
1303                 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1304                     nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1305                     nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1306                         goto nla_put_failure;
1307
1308                 genlmsg_end(msg, hdr);
1309         }
1310
1311         return 0;
1312
1313 nla_put_failure:
1314         genlmsg_cancel(msg, hdr);
1315         return -EMSGSIZE;
1316 }
1317
1318 static int nfc_genl_dump_ses(struct sk_buff *skb,
1319                                  struct netlink_callback *cb)
1320 {
1321         struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1322         struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1323         bool first_call = false;
1324
1325         if (!iter) {
1326                 first_call = true;
1327                 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1328                 if (!iter)
1329                         return -ENOMEM;
1330                 cb->args[0] = (long) iter;
1331         }
1332
1333         mutex_lock(&nfc_devlist_mutex);
1334
1335         cb->seq = nfc_devlist_generation;
1336
1337         if (first_call) {
1338                 nfc_device_iter_init(iter);
1339                 dev = nfc_device_iter_next(iter);
1340         }
1341
1342         while (dev) {
1343                 int rc;
1344
1345                 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1346                                           cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1347                 if (rc < 0)
1348                         break;
1349
1350                 dev = nfc_device_iter_next(iter);
1351         }
1352
1353         mutex_unlock(&nfc_devlist_mutex);
1354
1355         cb->args[1] = (long) dev;
1356
1357         return skb->len;
1358 }
1359
1360 static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1361 {
1362         struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1363
1364         nfc_device_iter_exit(iter);
1365         kfree(iter);
1366
1367         return 0;
1368 }
1369
1370 static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1371                      u8 *apdu, size_t apdu_length,
1372                      se_io_cb_t cb, void *cb_context)
1373 {
1374         struct nfc_se *se;
1375         int rc;
1376
1377         pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1378
1379         device_lock(&dev->dev);
1380
1381         if (!device_is_registered(&dev->dev)) {
1382                 rc = -ENODEV;
1383                 goto error;
1384         }
1385
1386         if (!dev->dev_up) {
1387                 rc = -ENODEV;
1388                 goto error;
1389         }
1390
1391         if (!dev->ops->se_io) {
1392                 rc = -EOPNOTSUPP;
1393                 goto error;
1394         }
1395
1396         se = nfc_find_se(dev, se_idx);
1397         if (!se) {
1398                 rc = -EINVAL;
1399                 goto error;
1400         }
1401
1402         if (se->state != NFC_SE_ENABLED) {
1403                 rc = -ENODEV;
1404                 goto error;
1405         }
1406
1407         rc = dev->ops->se_io(dev, se_idx, apdu,
1408                         apdu_length, cb, cb_context);
1409
1410 error:
1411         device_unlock(&dev->dev);
1412         return rc;
1413 }
1414
1415 struct se_io_ctx {
1416         u32 dev_idx;
1417         u32 se_idx;
1418 };
1419
1420 static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1421 {
1422         struct se_io_ctx *ctx = context;
1423         struct sk_buff *msg;
1424         void *hdr;
1425
1426         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1427         if (!msg) {
1428                 kfree(ctx);
1429                 return;
1430         }
1431
1432         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1433                           NFC_CMD_SE_IO);
1434         if (!hdr)
1435                 goto free_msg;
1436
1437         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1438             nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1439             nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1440                 goto nla_put_failure;
1441
1442         genlmsg_end(msg, hdr);
1443
1444         genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1445
1446         kfree(ctx);
1447
1448         return;
1449
1450 nla_put_failure:
1451         genlmsg_cancel(msg, hdr);
1452 free_msg:
1453         nlmsg_free(msg);
1454         kfree(ctx);
1455
1456         return;
1457 }
1458
1459 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1460 {
1461         struct nfc_dev *dev;
1462         struct se_io_ctx *ctx;
1463         u32 dev_idx, se_idx;
1464         u8 *apdu;
1465         size_t apdu_len;
1466
1467         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1468             !info->attrs[NFC_ATTR_SE_INDEX] ||
1469             !info->attrs[NFC_ATTR_SE_APDU])
1470                 return -EINVAL;
1471
1472         dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1473         se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1474
1475         dev = nfc_get_device(dev_idx);
1476         if (!dev)
1477                 return -ENODEV;
1478
1479         if (!dev->ops || !dev->ops->se_io)
1480                 return -ENOTSUPP;
1481
1482         apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1483         if (apdu_len == 0)
1484                 return -EINVAL;
1485
1486         apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1487         if (!apdu)
1488                 return -EINVAL;
1489
1490         ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1491         if (!ctx)
1492                 return -ENOMEM;
1493
1494         ctx->dev_idx = dev_idx;
1495         ctx->se_idx = se_idx;
1496
1497         return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1498 }
1499
1500 static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1501                                struct genl_info *info)
1502 {
1503         struct nfc_dev *dev;
1504         struct nfc_vendor_cmd *cmd;
1505         u32 dev_idx, vid, subcmd;
1506         u8 *data;
1507         size_t data_len;
1508         int i, err;
1509
1510         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1511             !info->attrs[NFC_ATTR_VENDOR_ID] ||
1512             !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1513                 return -EINVAL;
1514
1515         dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1516         vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1517         subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1518
1519         dev = nfc_get_device(dev_idx);
1520         if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
1521                 return -ENODEV;
1522
1523         if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1524                 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1525                 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1526                 if (data_len == 0)
1527                         return -EINVAL;
1528         } else {
1529                 data = NULL;
1530                 data_len = 0;
1531         }
1532
1533         for (i = 0; i < dev->n_vendor_cmds; i++) {
1534                 cmd = &dev->vendor_cmds[i];
1535
1536                 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1537                         continue;
1538
1539                 dev->cur_cmd_info = info;
1540                 err = cmd->doit(dev, data, data_len);
1541                 dev->cur_cmd_info = NULL;
1542                 return err;
1543         }
1544
1545         return -EOPNOTSUPP;
1546 }
1547
1548 /* message building helper */
1549 static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1550                                 int flags, u8 cmd)
1551 {
1552         /* since there is no private header just add the generic one */
1553         return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1554 }
1555
1556 static struct sk_buff *
1557 __nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1558                            u32 portid, u32 seq,
1559                            enum nfc_attrs attr,
1560                            u32 oui, u32 subcmd, gfp_t gfp)
1561 {
1562         struct sk_buff *skb;
1563         void *hdr;
1564
1565         skb = nlmsg_new(approxlen + 100, gfp);
1566         if (!skb)
1567                 return NULL;
1568
1569         hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1570         if (!hdr) {
1571                 kfree_skb(skb);
1572                 return NULL;
1573         }
1574
1575         if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1576                 goto nla_put_failure;
1577         if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1578                 goto nla_put_failure;
1579         if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1580                 goto nla_put_failure;
1581
1582         ((void **)skb->cb)[0] = dev;
1583         ((void **)skb->cb)[1] = hdr;
1584
1585         return skb;
1586
1587 nla_put_failure:
1588         kfree_skb(skb);
1589         return NULL;
1590 }
1591
1592 struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1593                                                  enum nfc_attrs attr,
1594                                                  u32 oui, u32 subcmd,
1595                                                  int approxlen)
1596 {
1597         if (WARN_ON(!dev->cur_cmd_info))
1598                 return NULL;
1599
1600         return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1601                                           dev->cur_cmd_info->snd_portid,
1602                                           dev->cur_cmd_info->snd_seq, attr,
1603                                           oui, subcmd, GFP_KERNEL);
1604 }
1605 EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1606
1607 int nfc_vendor_cmd_reply(struct sk_buff *skb)
1608 {
1609         struct nfc_dev *dev = ((void **)skb->cb)[0];
1610         void *hdr = ((void **)skb->cb)[1];
1611
1612         /* clear CB data for netlink core to own from now on */
1613         memset(skb->cb, 0, sizeof(skb->cb));
1614
1615         if (WARN_ON(!dev->cur_cmd_info)) {
1616                 kfree_skb(skb);
1617                 return -EINVAL;
1618         }
1619
1620         genlmsg_end(skb, hdr);
1621         return genlmsg_reply(skb, dev->cur_cmd_info);
1622 }
1623 EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1624
1625 static const struct genl_ops nfc_genl_ops[] = {
1626         {
1627                 .cmd = NFC_CMD_GET_DEVICE,
1628                 .doit = nfc_genl_get_device,
1629                 .dumpit = nfc_genl_dump_devices,
1630                 .done = nfc_genl_dump_devices_done,
1631                 .policy = nfc_genl_policy,
1632         },
1633         {
1634                 .cmd = NFC_CMD_DEV_UP,
1635                 .doit = nfc_genl_dev_up,
1636                 .policy = nfc_genl_policy,
1637         },
1638         {
1639                 .cmd = NFC_CMD_DEV_DOWN,
1640                 .doit = nfc_genl_dev_down,
1641                 .policy = nfc_genl_policy,
1642         },
1643         {
1644                 .cmd = NFC_CMD_START_POLL,
1645                 .doit = nfc_genl_start_poll,
1646                 .policy = nfc_genl_policy,
1647         },
1648         {
1649                 .cmd = NFC_CMD_STOP_POLL,
1650                 .doit = nfc_genl_stop_poll,
1651                 .policy = nfc_genl_policy,
1652         },
1653         {
1654                 .cmd = NFC_CMD_DEP_LINK_UP,
1655                 .doit = nfc_genl_dep_link_up,
1656                 .policy = nfc_genl_policy,
1657         },
1658         {
1659                 .cmd = NFC_CMD_DEP_LINK_DOWN,
1660                 .doit = nfc_genl_dep_link_down,
1661                 .policy = nfc_genl_policy,
1662         },
1663         {
1664                 .cmd = NFC_CMD_GET_TARGET,
1665                 .dumpit = nfc_genl_dump_targets,
1666                 .done = nfc_genl_dump_targets_done,
1667                 .policy = nfc_genl_policy,
1668         },
1669         {
1670                 .cmd = NFC_CMD_LLC_GET_PARAMS,
1671                 .doit = nfc_genl_llc_get_params,
1672                 .policy = nfc_genl_policy,
1673         },
1674         {
1675                 .cmd = NFC_CMD_LLC_SET_PARAMS,
1676                 .doit = nfc_genl_llc_set_params,
1677                 .policy = nfc_genl_policy,
1678         },
1679         {
1680                 .cmd = NFC_CMD_LLC_SDREQ,
1681                 .doit = nfc_genl_llc_sdreq,
1682                 .policy = nfc_genl_policy,
1683         },
1684         {
1685                 .cmd = NFC_CMD_FW_DOWNLOAD,
1686                 .doit = nfc_genl_fw_download,
1687                 .policy = nfc_genl_policy,
1688         },
1689         {
1690                 .cmd = NFC_CMD_ENABLE_SE,
1691                 .doit = nfc_genl_enable_se,
1692                 .policy = nfc_genl_policy,
1693         },
1694         {
1695                 .cmd = NFC_CMD_DISABLE_SE,
1696                 .doit = nfc_genl_disable_se,
1697                 .policy = nfc_genl_policy,
1698         },
1699         {
1700                 .cmd = NFC_CMD_GET_SE,
1701                 .dumpit = nfc_genl_dump_ses,
1702                 .done = nfc_genl_dump_ses_done,
1703                 .policy = nfc_genl_policy,
1704         },
1705         {
1706                 .cmd = NFC_CMD_SE_IO,
1707                 .doit = nfc_genl_se_io,
1708                 .policy = nfc_genl_policy,
1709         },
1710         {
1711                 .cmd = NFC_CMD_ACTIVATE_TARGET,
1712                 .doit = nfc_genl_activate_target,
1713                 .policy = nfc_genl_policy,
1714         },
1715         {
1716                 .cmd = NFC_CMD_VENDOR,
1717                 .doit = nfc_genl_vendor_cmd,
1718                 .policy = nfc_genl_policy,
1719         },
1720 };
1721
1722
1723 struct urelease_work {
1724         struct  work_struct w;
1725         u32     portid;
1726 };
1727
1728 static void nfc_urelease_event_work(struct work_struct *work)
1729 {
1730         struct urelease_work *w = container_of(work, struct urelease_work, w);
1731         struct class_dev_iter iter;
1732         struct nfc_dev *dev;
1733
1734         pr_debug("portid %d\n", w->portid);
1735
1736         mutex_lock(&nfc_devlist_mutex);
1737
1738         nfc_device_iter_init(&iter);
1739         dev = nfc_device_iter_next(&iter);
1740
1741         while (dev) {
1742                 mutex_lock(&dev->genl_data.genl_data_mutex);
1743
1744                 if (dev->genl_data.poll_req_portid == w->portid) {
1745                         nfc_stop_poll(dev);
1746                         dev->genl_data.poll_req_portid = 0;
1747                 }
1748
1749                 mutex_unlock(&dev->genl_data.genl_data_mutex);
1750
1751                 dev = nfc_device_iter_next(&iter);
1752         }
1753
1754         nfc_device_iter_exit(&iter);
1755
1756         mutex_unlock(&nfc_devlist_mutex);
1757
1758         kfree(w);
1759 }
1760
1761 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1762                                  unsigned long event, void *ptr)
1763 {
1764         struct netlink_notify *n = ptr;
1765         struct urelease_work *w;
1766
1767         if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1768                 goto out;
1769
1770         pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1771
1772         w = kmalloc(sizeof(*w), GFP_ATOMIC);
1773         if (w) {
1774                 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1775                 w->portid = n->portid;
1776                 schedule_work((struct work_struct *) w);
1777         }
1778
1779 out:
1780         return NOTIFY_DONE;
1781 }
1782
1783 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1784 {
1785         genl_data->poll_req_portid = 0;
1786         mutex_init(&genl_data->genl_data_mutex);
1787 }
1788
1789 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1790 {
1791         mutex_destroy(&genl_data->genl_data_mutex);
1792 }
1793
1794 static struct notifier_block nl_notifier = {
1795         .notifier_call  = nfc_genl_rcv_nl_event,
1796 };
1797
1798 /**
1799  * nfc_genl_init() - Initialize netlink interface
1800  *
1801  * This initialization function registers the nfc netlink family.
1802  */
1803 int __init nfc_genl_init(void)
1804 {
1805         int rc;
1806
1807         rc = genl_register_family_with_ops_groups(&nfc_genl_family,
1808                                                   nfc_genl_ops,
1809                                                   nfc_genl_mcgrps);
1810         if (rc)
1811                 return rc;
1812
1813         netlink_register_notifier(&nl_notifier);
1814
1815         return 0;
1816 }
1817
1818 /**
1819  * nfc_genl_exit() - Deinitialize netlink interface
1820  *
1821  * This exit function unregisters the nfc netlink family.
1822  */
1823 void nfc_genl_exit(void)
1824 {
1825         netlink_unregister_notifier(&nl_notifier);
1826         genl_unregister_family(&nfc_genl_family);
1827 }