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 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 }