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  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the
  20  * Free Software Foundation, Inc.,
  21  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  */
  23
  24 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
  25
  26 #include <net/genetlink.h>
  27 #include <linux/nfc.h>
  28 #include <linux/slab.h>
  29
  30 #include "nfc.h"
  31 #include "llcp.h"
  32
  33 static struct genl_multicast_group nfc_genl_event_mcgrp = {
  34         .name = NFC_GENL_MCAST_EVENT_NAME,
  35 };
  36
  37 static struct genl_family nfc_genl_family = {
  38         .id = GENL_ID_GENERATE,
  39         .hdrsize = 0,
  40         .name = NFC_GENL_NAME,
  41         .version = NFC_GENL_VERSION,
  42         .maxattr = NFC_ATTR_MAX,
  43 };
  44
  45 static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
  46         [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
  47         [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
  48                                 .len = NFC_DEVICE_NAME_MAXSIZE },
  49         [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
  50         [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
  51         [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
  52         [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
  53         [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
  54         [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
  55         [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
  56         [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
  57         [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
  58         [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
  59         [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
  60                                      .len = NFC_FIRMWARE_NAME_MAXSIZE },
  61         [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
  62 };
  63
  64 static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
  65         [NFC_SDP_ATTR_URI] = { .type = NLA_STRING },
  66         [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
  67 };
  68
  69 static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
  70                                 struct netlink_callback *cb, int flags)
  71 {
  72         void *hdr;
  73
  74         hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
  75                           &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
  76         if (!hdr)
  77                 return -EMSGSIZE;
  78
  79         genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
  80
  81         if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
  82             nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
  83             nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
  84             nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
  85                 goto nla_put_failure;
  86         if (target->nfcid1_len > 0 &&
  87             nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
  88                     target->nfcid1))
  89                 goto nla_put_failure;
  90         if (target->sensb_res_len > 0 &&
  91             nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
  92                     target->sensb_res))
  93                 goto nla_put_failure;
  94         if (target->sensf_res_len > 0 &&
  95             nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
  96                     target->sensf_res))
  97                 goto nla_put_failure;
  98
  99         return genlmsg_end(msg, hdr);
 100
 101 nla_put_failure:
 102         genlmsg_cancel(msg, hdr);
 103         return -EMSGSIZE;
 104 }
 105
 106 static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
 107 {
 108         struct nfc_dev *dev;
 109         int rc;
 110         u32 idx;
 111
 112         rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
 113                          nfc_genl_family.attrbuf,
 114                          nfc_genl_family.maxattr,
 115                          nfc_genl_policy);
 116         if (rc < 0)
 117                 return ERR_PTR(rc);
 118
 119         if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX])
 120                 return ERR_PTR(-EINVAL);
 121
 122         idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]);
 123
 124         dev = nfc_get_device(idx);
 125         if (!dev)
 126                 return ERR_PTR(-ENODEV);
 127
 128         return dev;
 129 }
 130
 131 static int nfc_genl_dump_targets(struct sk_buff *skb,
 132                                  struct netlink_callback *cb)
 133 {
 134         int i = cb->args[0];
 135         struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
 136         int rc;
 137
 138         if (!dev) {
 139                 dev = __get_device_from_cb(cb);
 140                 if (IS_ERR(dev))
 141                         return PTR_ERR(dev);
 142
 143                 cb->args[1] = (long) dev;
 144         }
 145
 146         device_lock(&dev->dev);
 147
 148         cb->seq = dev->targets_generation;
 149
 150         while (i < dev->n_targets) {
 151                 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
 152                                           NLM_F_MULTI);
 153                 if (rc < 0)
 154                         break;
 155
 156                 i++;
 157         }
 158
 159         device_unlock(&dev->dev);
 160
 161         cb->args[0] = i;
 162
 163         return skb->len;
 164 }
 165
 166 static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
 167 {
 168         struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
 169
 170         if (dev)
 171                 nfc_put_device(dev);
 172
 173         return 0;
 174 }
 175
 176 int nfc_genl_targets_found(struct nfc_dev *dev)
 177 {
 178         struct sk_buff *msg;
 179         void *hdr;
 180
 181         dev->genl_data.poll_req_portid = 0;
 182
 183         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 184         if (!msg)
 185                 return -ENOMEM;
 186
 187         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 188                           NFC_EVENT_TARGETS_FOUND);
 189         if (!hdr)
 190                 goto free_msg;
 191
 192         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 193                 goto nla_put_failure;
 194
 195         genlmsg_end(msg, hdr);
 196
 197         return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
 198
 199 nla_put_failure:
 200         genlmsg_cancel(msg, hdr);
 201 free_msg:
 202         nlmsg_free(msg);
 203         return -EMSGSIZE;
 204 }
 205
 206 int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
 207 {
 208         struct sk_buff *msg;
 209         void *hdr;
 210
 211         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 212         if (!msg)
 213                 return -ENOMEM;
 214
 215         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 216                           NFC_EVENT_TARGET_LOST);
 217         if (!hdr)
 218                 goto free_msg;
 219
 220         if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
 221             nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
 222                 goto nla_put_failure;
 223
 224         genlmsg_end(msg, hdr);
 225
 226         genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
 227
 228         return 0;
 229
 230 nla_put_failure:
 231         genlmsg_cancel(msg, hdr);
 232 free_msg:
 233         nlmsg_free(msg);
 234         return -EMSGSIZE;
 235 }
 236
 237 int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
 238 {
 239         struct sk_buff *msg;
 240         void *hdr;
 241
 242         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 243         if (!msg)
 244                 return -ENOMEM;
 245
 246         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 247                           NFC_EVENT_TM_ACTIVATED);
 248         if (!hdr)
 249                 goto free_msg;
 250
 251         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 252                 goto nla_put_failure;
 253         if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
 254                 goto nla_put_failure;
 255
 256         genlmsg_end(msg, hdr);
 257
 258         genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
 259
 260         return 0;
 261
 262 nla_put_failure:
 263         genlmsg_cancel(msg, hdr);
 264 free_msg:
 265         nlmsg_free(msg);
 266         return -EMSGSIZE;
 267 }
 268
 269 int nfc_genl_tm_deactivated(struct nfc_dev *dev)
 270 {
 271         struct sk_buff *msg;
 272         void *hdr;
 273
 274         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 275         if (!msg)
 276                 return -ENOMEM;
 277
 278         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 279                           NFC_EVENT_TM_DEACTIVATED);
 280         if (!hdr)
 281                 goto free_msg;
 282
 283         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 284                 goto nla_put_failure;
 285
 286         genlmsg_end(msg, hdr);
 287
 288         genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
 289
 290         return 0;
 291
 292 nla_put_failure:
 293         genlmsg_cancel(msg, hdr);
 294 free_msg:
 295         nlmsg_free(msg);
 296         return -EMSGSIZE;
 297 }
 298
 299 int nfc_genl_device_added(struct nfc_dev *dev)
 300 {
 301         struct sk_buff *msg;
 302         void *hdr;
 303
 304         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 305         if (!msg)
 306                 return -ENOMEM;
 307
 308         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 309                           NFC_EVENT_DEVICE_ADDED);
 310         if (!hdr)
 311                 goto free_msg;
 312
 313         if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
 314             nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
 315             nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
 316             nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
 317                 goto nla_put_failure;
 318
 319         genlmsg_end(msg, hdr);
 320
 321         genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
 322
 323         return 0;
 324
 325 nla_put_failure:
 326         genlmsg_cancel(msg, hdr);
 327 free_msg:
 328         nlmsg_free(msg);
 329         return -EMSGSIZE;
 330 }
 331
 332 int nfc_genl_device_removed(struct nfc_dev *dev)
 333 {
 334         struct sk_buff *msg;
 335         void *hdr;
 336
 337         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 338         if (!msg)
 339                 return -ENOMEM;
 340
 341         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 342                           NFC_EVENT_DEVICE_REMOVED);
 343         if (!hdr)
 344                 goto free_msg;
 345
 346         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 347                 goto nla_put_failure;
 348
 349         genlmsg_end(msg, hdr);
 350
 351         genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
 352
 353         return 0;
 354
 355 nla_put_failure:
 356         genlmsg_cancel(msg, hdr);
 357 free_msg:
 358         nlmsg_free(msg);
 359         return -EMSGSIZE;
 360 }
 361
 362 int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
 363 {
 364         struct sk_buff *msg;
 365         struct nlattr *sdp_attr, *uri_attr;
 366         struct nfc_llcp_sdp_tlv *sdres;
 367         struct hlist_node *n;
 368         void *hdr;
 369         int rc = -EMSGSIZE;
 370         int i;
 371
 372         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 373         if (!msg)
 374                 return -ENOMEM;
 375
 376         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 377                           NFC_EVENT_LLC_SDRES);
 378         if (!hdr)
 379                 goto free_msg;
 380
 381         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 382                 goto nla_put_failure;
 383
 384         sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
 385         if (sdp_attr == NULL) {
 386                 rc = -ENOMEM;
 387                 goto nla_put_failure;
 388         }
 389
 390         i = 1;
 391         hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
 392                 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
 393
 394                 uri_attr = nla_nest_start(msg, i++);
 395                 if (uri_attr == NULL) {
 396                         rc = -ENOMEM;
 397                         goto nla_put_failure;
 398                 }
 399
 400                 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
 401                         goto nla_put_failure;
 402
 403                 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
 404                         goto nla_put_failure;
 405
 406                 nla_nest_end(msg, uri_attr);
 407
 408                 hlist_del(&sdres->node);
 409
 410                 nfc_llcp_free_sdp_tlv(sdres);
 411         }
 412
 413         nla_nest_end(msg, sdp_attr);
 414
 415         genlmsg_end(msg, hdr);
 416
 417         return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
 418
 419 nla_put_failure:
 420         genlmsg_cancel(msg, hdr);
 421
 422 free_msg:
 423         nlmsg_free(msg);
 424
 425         nfc_llcp_free_sdp_tlv_list(sdres_list);
 426
 427         return rc;
 428 }
 429
 430 int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
 431 {
 432         struct sk_buff *msg;
 433         void *hdr;
 434
 435         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 436         if (!msg)
 437                 return -ENOMEM;
 438
 439         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 440                           NFC_EVENT_SE_ADDED);
 441         if (!hdr)
 442                 goto free_msg;
 443
 444         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
 445             nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
 446             nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
 447                 goto nla_put_failure;
 448
 449         genlmsg_end(msg, hdr);
 450
 451         genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
 452
 453         return 0;
 454
 455 nla_put_failure:
 456         genlmsg_cancel(msg, hdr);
 457 free_msg:
 458         nlmsg_free(msg);
 459         return -EMSGSIZE;
 460 }
 461
 462 int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
 463 {
 464         struct sk_buff *msg;
 465         void *hdr;
 466
 467         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 468         if (!msg)
 469                 return -ENOMEM;
 470
 471         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 472                           NFC_EVENT_SE_REMOVED);
 473         if (!hdr)
 474                 goto free_msg;
 475
 476         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
 477             nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
 478                 goto nla_put_failure;
 479
 480         genlmsg_end(msg, hdr);
 481
 482         genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
 483
 484         return 0;
 485
 486 nla_put_failure:
 487         genlmsg_cancel(msg, hdr);
 488 free_msg:
 489         nlmsg_free(msg);
 490         return -EMSGSIZE;
 491 }
 492
 493 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
 494                                 u32 portid, u32 seq,
 495                                 struct netlink_callback *cb,
 496                                 int flags)
 497 {
 498         void *hdr;
 499
 500         hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
 501                           NFC_CMD_GET_DEVICE);
 502         if (!hdr)
 503                 return -EMSGSIZE;
 504
 505         if (cb)
 506                 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
 507
 508         if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
 509             nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
 510             nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
 511             nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
 512             nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
 513                 goto nla_put_failure;
 514
 515         return genlmsg_end(msg, hdr);
 516
 517 nla_put_failure:
 518         genlmsg_cancel(msg, hdr);
 519         return -EMSGSIZE;
 520 }
 521
 522 static int nfc_genl_dump_devices(struct sk_buff *skb,
 523                                  struct netlink_callback *cb)
 524 {
 525         struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
 526         struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
 527         bool first_call = false;
 528
 529         if (!iter) {
 530                 first_call = true;
 531                 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
 532                 if (!iter)
 533                         return -ENOMEM;
 534                 cb->args[0] = (long) iter;
 535         }
 536
 537         mutex_lock(&nfc_devlist_mutex);
 538
 539         cb->seq = nfc_devlist_generation;
 540
 541         if (first_call) {
 542                 nfc_device_iter_init(iter);
 543                 dev = nfc_device_iter_next(iter);
 544         }
 545
 546         while (dev) {
 547                 int rc;
 548
 549                 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
 550                                           cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
 551                 if (rc < 0)
 552                         break;
 553
 554                 dev = nfc_device_iter_next(iter);
 555         }
 556
 557         mutex_unlock(&nfc_devlist_mutex);
 558
 559         cb->args[1] = (long) dev;
 560
 561         return skb->len;
 562 }
 563
 564 static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
 565 {
 566         struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
 567
 568         nfc_device_iter_exit(iter);
 569         kfree(iter);
 570
 571         return 0;
 572 }
 573
 574 int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
 575                                u8 comm_mode, u8 rf_mode)
 576 {
 577         struct sk_buff *msg;
 578         void *hdr;
 579
 580         pr_debug("DEP link is up\n");
 581
 582         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 583         if (!msg)
 584                 return -ENOMEM;
 585
 586         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
 587         if (!hdr)
 588                 goto free_msg;
 589
 590         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 591                 goto nla_put_failure;
 592         if (rf_mode == NFC_RF_INITIATOR &&
 593             nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
 594                 goto nla_put_failure;
 595         if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
 596             nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
 597                 goto nla_put_failure;
 598
 599         genlmsg_end(msg, hdr);
 600
 601         dev->dep_link_up = true;
 602
 603         genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
 604
 605         return 0;
 606
 607 nla_put_failure:
 608         genlmsg_cancel(msg, hdr);
 609 free_msg:
 610         nlmsg_free(msg);
 611         return -EMSGSIZE;
 612 }
 613
 614 int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
 615 {
 616         struct sk_buff *msg;
 617         void *hdr;
 618
 619         pr_debug("DEP link is down\n");
 620
 621         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 622         if (!msg)
 623                 return -ENOMEM;
 624
 625         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 626                           NFC_CMD_DEP_LINK_DOWN);
 627         if (!hdr)
 628                 goto free_msg;
 629
 630         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 631                 goto nla_put_failure;
 632
 633         genlmsg_end(msg, hdr);
 634
 635         genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
 636
 637         return 0;
 638
 639 nla_put_failure:
 640         genlmsg_cancel(msg, hdr);
 641 free_msg:
 642         nlmsg_free(msg);
 643         return -EMSGSIZE;
 644 }
 645
 646 static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
 647 {
 648         struct sk_buff *msg;
 649         struct nfc_dev *dev;
 650         u32 idx;
 651         int rc = -ENOBUFS;
 652
 653         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 654                 return -EINVAL;
 655
 656         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 657
 658         dev = nfc_get_device(idx);
 659         if (!dev)
 660                 return -ENODEV;
 661
 662         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 663         if (!msg) {
 664                 rc = -ENOMEM;
 665                 goto out_putdev;
 666         }
 667
 668         rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
 669                                   NULL, 0);
 670         if (rc < 0)
 671                 goto out_free;
 672
 673         nfc_put_device(dev);
 674
 675         return genlmsg_reply(msg, info);
 676
 677 out_free:
 678         nlmsg_free(msg);
 679 out_putdev:
 680         nfc_put_device(dev);
 681         return rc;
 682 }
 683
 684 static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
 685 {
 686         struct nfc_dev *dev;
 687         int rc;
 688         u32 idx;
 689
 690         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 691                 return -EINVAL;
 692
 693         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 694
 695         dev = nfc_get_device(idx);
 696         if (!dev)
 697                 return -ENODEV;
 698
 699         rc = nfc_dev_up(dev);
 700
 701         nfc_put_device(dev);
 702         return rc;
 703 }
 704
 705 static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
 706 {
 707         struct nfc_dev *dev;
 708         int rc;
 709         u32 idx;
 710
 711         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 712                 return -EINVAL;
 713
 714         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 715
 716         dev = nfc_get_device(idx);
 717         if (!dev)
 718                 return -ENODEV;
 719
 720         rc = nfc_dev_down(dev);
 721
 722         nfc_put_device(dev);
 723         return rc;
 724 }
 725
 726 static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
 727 {
 728         struct nfc_dev *dev;
 729         int rc;
 730         u32 idx;
 731         u32 im_protocols = 0, tm_protocols = 0;
 732
 733         pr_debug("Poll start\n");
 734
 735         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
 736             ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
 737               !info->attrs[NFC_ATTR_PROTOCOLS]) &&
 738               !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
 739                 return -EINVAL;
 740
 741         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 742
 743         if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
 744                 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
 745
 746         if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
 747                 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
 748         else if (info->attrs[NFC_ATTR_PROTOCOLS])
 749                 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
 750
 751         dev = nfc_get_device(idx);
 752         if (!dev)
 753                 return -ENODEV;
 754
 755         mutex_lock(&dev->genl_data.genl_data_mutex);
 756
 757         rc = nfc_start_poll(dev, im_protocols, tm_protocols);
 758         if (!rc)
 759                 dev->genl_data.poll_req_portid = info->snd_portid;
 760
 761         mutex_unlock(&dev->genl_data.genl_data_mutex);
 762
 763         nfc_put_device(dev);
 764         return rc;
 765 }
 766
 767 static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
 768 {
 769         struct nfc_dev *dev;
 770         int rc;
 771         u32 idx;
 772
 773         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 774                 return -EINVAL;
 775
 776         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 777
 778         dev = nfc_get_device(idx);
 779         if (!dev)
 780                 return -ENODEV;
 781
 782         device_lock(&dev->dev);
 783
 784         if (!dev->polling) {
 785                 device_unlock(&dev->dev);
 786                 return -EINVAL;
 787         }
 788
 789         device_unlock(&dev->dev);
 790
 791         mutex_lock(&dev->genl_data.genl_data_mutex);
 792
 793         if (dev->genl_data.poll_req_portid != info->snd_portid) {
 794                 rc = -EBUSY;
 795                 goto out;
 796         }
 797
 798         rc = nfc_stop_poll(dev);
 799         dev->genl_data.poll_req_portid = 0;
 800
 801 out:
 802         mutex_unlock(&dev->genl_data.genl_data_mutex);
 803         nfc_put_device(dev);
 804         return rc;
 805 }
 806
 807 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
 808 {
 809         struct nfc_dev *dev;
 810         int rc, tgt_idx;
 811         u32 idx;
 812         u8 comm;
 813
 814         pr_debug("DEP link up\n");
 815
 816         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
 817             !info->attrs[NFC_ATTR_COMM_MODE])
 818                 return -EINVAL;
 819
 820         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 821         if (!info->attrs[NFC_ATTR_TARGET_INDEX])
 822                 tgt_idx = NFC_TARGET_IDX_ANY;
 823         else
 824                 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
 825
 826         comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
 827
 828         if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
 829                 return -EINVAL;
 830
 831         dev = nfc_get_device(idx);
 832         if (!dev)
 833                 return -ENODEV;
 834
 835         rc = nfc_dep_link_up(dev, tgt_idx, comm);
 836
 837         nfc_put_device(dev);
 838
 839         return rc;
 840 }
 841
 842 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
 843 {
 844         struct nfc_dev *dev;
 845         int rc;
 846         u32 idx;
 847
 848         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 849                 return -EINVAL;
 850
 851         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 852
 853         dev = nfc_get_device(idx);
 854         if (!dev)
 855                 return -ENODEV;
 856
 857         rc = nfc_dep_link_down(dev);
 858
 859         nfc_put_device(dev);
 860         return rc;
 861 }
 862
 863 static int nfc_genl_send_params(struct sk_buff *msg,
 864                                 struct nfc_llcp_local *local,
 865                                 u32 portid, u32 seq)
 866 {
 867         void *hdr;
 868
 869         hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
 870                           NFC_CMD_LLC_GET_PARAMS);
 871         if (!hdr)
 872                 return -EMSGSIZE;
 873
 874         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
 875             nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
 876             nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
 877             nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
 878                 goto nla_put_failure;
 879
 880         return genlmsg_end(msg, hdr);
 881
 882 nla_put_failure:
 883
 884         genlmsg_cancel(msg, hdr);
 885         return -EMSGSIZE;
 886 }
 887
 888 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
 889 {
 890         struct nfc_dev *dev;
 891         struct nfc_llcp_local *local;
 892         int rc = 0;
 893         struct sk_buff *msg = NULL;
 894         u32 idx;
 895
 896         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 897                 return -EINVAL;
 898
 899         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 900
 901         dev = nfc_get_device(idx);
 902         if (!dev)
 903                 return -ENODEV;
 904
 905         device_lock(&dev->dev);
 906
 907         local = nfc_llcp_find_local(dev);
 908         if (!local) {
 909                 rc = -ENODEV;
 910                 goto exit;
 911         }
 912
 913         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 914         if (!msg) {
 915                 rc = -ENOMEM;
 916                 goto exit;
 917         }
 918
 919         rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
 920
 921 exit:
 922         device_unlock(&dev->dev);
 923
 924         nfc_put_device(dev);
 925
 926         if (rc < 0) {
 927                 if (msg)
 928                         nlmsg_free(msg);
 929
 930                 return rc;
 931         }
 932
 933         return genlmsg_reply(msg, info);
 934 }
 935
 936 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
 937 {
 938         struct nfc_dev *dev;
 939         struct nfc_llcp_local *local;
 940         u8 rw = 0;
 941         u16 miux = 0;
 942         u32 idx;
 943         int rc = 0;
 944
 945         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
 946             (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
 947              !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
 948              !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
 949                 return -EINVAL;
 950
 951         if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
 952                 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
 953
 954                 if (rw > LLCP_MAX_RW)
 955                         return -EINVAL;
 956         }
 957
 958         if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
 959                 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
 960
 961                 if (miux > LLCP_MAX_MIUX)
 962                         return -EINVAL;
 963         }
 964
 965         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 966
 967         dev = nfc_get_device(idx);
 968         if (!dev)
 969                 return -ENODEV;
 970
 971         device_lock(&dev->dev);
 972
 973         local = nfc_llcp_find_local(dev);
 974         if (!local) {
 975                 nfc_put_device(dev);
 976                 rc = -ENODEV;
 977                 goto exit;
 978         }
 979
 980         if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
 981                 if (dev->dep_link_up) {
 982                         rc = -EINPROGRESS;
 983                         goto exit;
 984                 }
 985
 986                 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
 987         }
 988
 989         if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
 990                 local->rw = rw;
 991
 992         if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
 993                 local->miux = cpu_to_be16(miux);
 994
 995 exit:
 996         device_unlock(&dev->dev);
 997
 998         nfc_put_device(dev);
 999
1000         return rc;
1001 }
1002
1003 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1004 {
1005         struct nfc_dev *dev;
1006         struct nfc_llcp_local *local;
1007         struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1008         u32 idx;
1009         u8 tid;
1010         char *uri;
1011         int rc = 0, rem;
1012         size_t uri_len, tlvs_len;
1013         struct hlist_head sdreq_list;
1014         struct nfc_llcp_sdp_tlv *sdreq;
1015
1016         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1017             !info->attrs[NFC_ATTR_LLC_SDP])
1018                 return -EINVAL;
1019
1020         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1021
1022         dev = nfc_get_device(idx);
1023         if (!dev) {
1024                 rc = -ENODEV;
1025                 goto exit;
1026         }
1027
1028         device_lock(&dev->dev);
1029
1030         if (dev->dep_link_up == false) {
1031                 rc = -ENOLINK;
1032                 goto exit;
1033         }
1034
1035         local = nfc_llcp_find_local(dev);
1036         if (!local) {
1037                 nfc_put_device(dev);
1038                 rc = -ENODEV;
1039                 goto exit;
1040         }
1041
1042         INIT_HLIST_HEAD(&sdreq_list);
1043
1044         tlvs_len = 0;
1045
1046         nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1047                 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
1048                                       nfc_sdp_genl_policy);
1049
1050                 if (rc != 0) {
1051                         rc = -EINVAL;
1052                         goto exit;
1053                 }
1054
1055                 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1056                         continue;
1057
1058                 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1059                 if (uri_len == 0)
1060                         continue;
1061
1062                 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1063                 if (uri == NULL || *uri == 0)
1064                         continue;
1065
1066                 tid = local->sdreq_next_tid++;
1067
1068                 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1069                 if (sdreq == NULL) {
1070                         rc = -ENOMEM;
1071                         goto exit;
1072                 }
1073
1074                 tlvs_len += sdreq->tlv_len;
1075
1076                 hlist_add_head(&sdreq->node, &sdreq_list);
1077         }
1078
1079         if (hlist_empty(&sdreq_list)) {
1080                 rc = -EINVAL;
1081                 goto exit;
1082         }
1083
1084         rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1085 exit:
1086         device_unlock(&dev->dev);
1087
1088         nfc_put_device(dev);
1089
1090         return rc;
1091 }
1092
1093 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1094 {
1095         struct nfc_dev *dev;
1096         int rc;
1097         u32 idx;
1098         char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1099
1100         if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1101                 return -EINVAL;
1102
1103         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1104
1105         dev = nfc_get_device(idx);
1106         if (!dev)
1107                 return -ENODEV;
1108
1109         nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1110                     sizeof(firmware_name));
1111
1112         rc = nfc_fw_download(dev, firmware_name);
1113
1114         nfc_put_device(dev);
1115         return rc;
1116 }
1117
1118 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1119                               u32 result)
1120 {
1121         struct sk_buff *msg;
1122         void *hdr;
1123
1124         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1125         if (!msg)
1126                 return -ENOMEM;
1127
1128         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1129                           NFC_CMD_FW_DOWNLOAD);
1130         if (!hdr)
1131                 goto free_msg;
1132
1133         if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1134             nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1135             nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1136                 goto nla_put_failure;
1137
1138         genlmsg_end(msg, hdr);
1139
1140         genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
1141
1142         return 0;
1143
1144 nla_put_failure:
1145         genlmsg_cancel(msg, hdr);
1146 free_msg:
1147         nlmsg_free(msg);
1148         return -EMSGSIZE;
1149 }
1150
1151 static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1152 {
1153         struct nfc_dev *dev;
1154         int rc;
1155         u32 idx, se_idx;
1156
1157         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1158             !info->attrs[NFC_ATTR_SE_INDEX])
1159                 return -EINVAL;
1160
1161         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1162         se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1163
1164         dev = nfc_get_device(idx);
1165         if (!dev)
1166                 return -ENODEV;
1167
1168         rc = nfc_enable_se(dev, se_idx);
1169
1170         nfc_put_device(dev);
1171         return rc;
1172 }
1173
1174 static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1175 {
1176         struct nfc_dev *dev;
1177         int rc;
1178         u32 idx, se_idx;
1179
1180         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1181             !info->attrs[NFC_ATTR_SE_INDEX])
1182                 return -EINVAL;
1183
1184         idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1185         se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1186
1187         dev = nfc_get_device(idx);
1188         if (!dev)
1189                 return -ENODEV;
1190
1191         rc = nfc_disable_se(dev, se_idx);
1192
1193         nfc_put_device(dev);
1194         return rc;
1195 }
1196
1197 static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1198                                 u32 portid, u32 seq,
1199                                 struct netlink_callback *cb,
1200                                 int flags)
1201 {
1202         void *hdr;
1203         struct nfc_se *se, *n;
1204
1205         list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1206                 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1207                                   NFC_CMD_GET_SE);
1208                 if (!hdr)
1209                         goto nla_put_failure;
1210
1211                 if (cb)
1212                         genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
1213
1214                 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1215                     nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1216                     nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1217                         goto nla_put_failure;
1218
1219                 if (genlmsg_end(msg, hdr) < 0)
1220                         goto nla_put_failure;
1221         }
1222
1223         return 0;
1224
1225 nla_put_failure:
1226         genlmsg_cancel(msg, hdr);
1227         return -EMSGSIZE;
1228 }
1229
1230 static int nfc_genl_dump_ses(struct sk_buff *skb,
1231                                  struct netlink_callback *cb)
1232 {
1233         struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1234         struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1235         bool first_call = false;
1236
1237         if (!iter) {
1238                 first_call = true;
1239                 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1240                 if (!iter)
1241                         return -ENOMEM;
1242                 cb->args[0] = (long) iter;
1243         }
1244
1245         mutex_lock(&nfc_devlist_mutex);
1246
1247         cb->seq = nfc_devlist_generation;
1248
1249         if (first_call) {
1250                 nfc_device_iter_init(iter);
1251                 dev = nfc_device_iter_next(iter);
1252         }
1253
1254         while (dev) {
1255                 int rc;
1256
1257                 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1258                                           cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1259                 if (rc < 0)
1260                         break;
1261
1262                 dev = nfc_device_iter_next(iter);
1263         }
1264
1265         mutex_unlock(&nfc_devlist_mutex);
1266
1267         cb->args[1] = (long) dev;
1268
1269         return skb->len;
1270 }
1271
1272 static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1273 {
1274         struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1275
1276         nfc_device_iter_exit(iter);
1277         kfree(iter);
1278
1279         return 0;
1280 }
1281
1282 struct se_io_ctx {
1283         u32 dev_idx;
1284         u32 se_idx;
1285 };
1286
1287 static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1288 {
1289         struct se_io_ctx *ctx = context;
1290         struct sk_buff *msg;
1291         void *hdr;
1292
1293         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1294         if (!msg) {
1295                 kfree(ctx);
1296                 return;
1297         }
1298
1299         hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1300                           NFC_CMD_SE_IO);
1301         if (!hdr)
1302                 goto free_msg;
1303
1304         if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1305             nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1306             nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1307                 goto nla_put_failure;
1308
1309         genlmsg_end(msg, hdr);
1310
1311         genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
1312
1313         kfree(ctx);
1314
1315         return;
1316
1317 nla_put_failure:
1318         genlmsg_cancel(msg, hdr);
1319 free_msg:
1320         nlmsg_free(msg);
1321         kfree(ctx);
1322
1323         return;
1324 }
1325
1326 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1327 {
1328         struct nfc_dev *dev;
1329         struct se_io_ctx *ctx;
1330         u32 dev_idx, se_idx;
1331         u8 *apdu;
1332         size_t apdu_len;
1333
1334         if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1335             !info->attrs[NFC_ATTR_SE_INDEX] ||
1336             !info->attrs[NFC_ATTR_SE_APDU])
1337                 return -EINVAL;
1338
1339         dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1340         se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1341
1342         dev = nfc_get_device(dev_idx);
1343         if (!dev)
1344                 return -ENODEV;
1345
1346         if (!dev->ops || !dev->ops->se_io)
1347                 return -ENOTSUPP;
1348
1349         apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1350         if (apdu_len == 0)
1351                 return -EINVAL;
1352
1353         apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1354         if (!apdu)
1355                 return -EINVAL;
1356
1357         ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1358         if (!ctx)
1359                 return -ENOMEM;
1360
1361         ctx->dev_idx = dev_idx;
1362         ctx->se_idx = se_idx;
1363
1364         return dev->ops->se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1365 }
1366
1367 static struct genl_ops nfc_genl_ops[] = {
1368         {
1369                 .cmd = NFC_CMD_GET_DEVICE,
1370                 .doit = nfc_genl_get_device,
1371                 .dumpit = nfc_genl_dump_devices,
1372                 .done = nfc_genl_dump_devices_done,
1373                 .policy = nfc_genl_policy,
1374         },
1375         {
1376                 .cmd = NFC_CMD_DEV_UP,
1377                 .doit = nfc_genl_dev_up,
1378                 .policy = nfc_genl_policy,
1379         },
1380         {
1381                 .cmd = NFC_CMD_DEV_DOWN,
1382                 .doit = nfc_genl_dev_down,
1383                 .policy = nfc_genl_policy,
1384         },
1385         {
1386                 .cmd = NFC_CMD_START_POLL,
1387                 .doit = nfc_genl_start_poll,
1388                 .policy = nfc_genl_policy,
1389         },
1390         {
1391                 .cmd = NFC_CMD_STOP_POLL,
1392                 .doit = nfc_genl_stop_poll,
1393                 .policy = nfc_genl_policy,
1394         },
1395         {
1396                 .cmd = NFC_CMD_DEP_LINK_UP,
1397                 .doit = nfc_genl_dep_link_up,
1398                 .policy = nfc_genl_policy,
1399         },
1400         {
1401                 .cmd = NFC_CMD_DEP_LINK_DOWN,
1402                 .doit = nfc_genl_dep_link_down,
1403                 .policy = nfc_genl_policy,
1404         },
1405         {
1406                 .cmd = NFC_CMD_GET_TARGET,
1407                 .dumpit = nfc_genl_dump_targets,
1408                 .done = nfc_genl_dump_targets_done,
1409                 .policy = nfc_genl_policy,
1410         },
1411         {
1412                 .cmd = NFC_CMD_LLC_GET_PARAMS,
1413                 .doit = nfc_genl_llc_get_params,
1414                 .policy = nfc_genl_policy,
1415         },
1416         {
1417                 .cmd = NFC_CMD_LLC_SET_PARAMS,
1418                 .doit = nfc_genl_llc_set_params,
1419                 .policy = nfc_genl_policy,
1420         },
1421         {
1422                 .cmd = NFC_CMD_LLC_SDREQ,
1423                 .doit = nfc_genl_llc_sdreq,
1424                 .policy = nfc_genl_policy,
1425         },
1426         {
1427                 .cmd = NFC_CMD_FW_DOWNLOAD,
1428                 .doit = nfc_genl_fw_download,
1429                 .policy = nfc_genl_policy,
1430         },
1431         {
1432                 .cmd = NFC_CMD_ENABLE_SE,
1433                 .doit = nfc_genl_enable_se,
1434                 .policy = nfc_genl_policy,
1435         },
1436         {
1437                 .cmd = NFC_CMD_DISABLE_SE,
1438                 .doit = nfc_genl_disable_se,
1439                 .policy = nfc_genl_policy,
1440         },
1441         {
1442                 .cmd = NFC_CMD_GET_SE,
1443                 .dumpit = nfc_genl_dump_ses,
1444                 .done = nfc_genl_dump_ses_done,
1445                 .policy = nfc_genl_policy,
1446         },
1447         {
1448                 .cmd = NFC_CMD_SE_IO,
1449                 .doit = nfc_genl_se_io,
1450                 .policy = nfc_genl_policy,
1451         },
1452 };
1453
1454
1455 struct urelease_work {
1456         struct  work_struct w;
1457         int     portid;
1458 };
1459
1460 static void nfc_urelease_event_work(struct work_struct *work)
1461 {
1462         struct urelease_work *w = container_of(work, struct urelease_work, w);
1463         struct class_dev_iter iter;
1464         struct nfc_dev *dev;
1465
1466         pr_debug("portid %d\n", w->portid);
1467
1468         mutex_lock(&nfc_devlist_mutex);
1469
1470         nfc_device_iter_init(&iter);
1471         dev = nfc_device_iter_next(&iter);
1472
1473         while (dev) {
1474                 mutex_lock(&dev->genl_data.genl_data_mutex);
1475
1476                 if (dev->genl_data.poll_req_portid == w->portid) {
1477                         nfc_stop_poll(dev);
1478                         dev->genl_data.poll_req_portid = 0;
1479                 }
1480
1481                 mutex_unlock(&dev->genl_data.genl_data_mutex);
1482
1483                 dev = nfc_device_iter_next(&iter);
1484         }
1485
1486         nfc_device_iter_exit(&iter);
1487
1488         mutex_unlock(&nfc_devlist_mutex);
1489
1490         kfree(w);
1491 }
1492
1493 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1494                                  unsigned long event, void *ptr)
1495 {
1496         struct netlink_notify *n = ptr;
1497         struct urelease_work *w;
1498
1499         if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1500                 goto out;
1501
1502         pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1503
1504         w = kmalloc(sizeof(*w), GFP_ATOMIC);
1505         if (w) {
1506                 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1507                 w->portid = n->portid;
1508                 schedule_work((struct work_struct *) w);
1509         }
1510
1511 out:
1512         return NOTIFY_DONE;
1513 }
1514
1515 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1516 {
1517         genl_data->poll_req_portid = 0;
1518         mutex_init(&genl_data->genl_data_mutex);
1519 }
1520
1521 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1522 {
1523         mutex_destroy(&genl_data->genl_data_mutex);
1524 }
1525
1526 static struct notifier_block nl_notifier = {
1527         .notifier_call  = nfc_genl_rcv_nl_event,
1528 };
1529
1530 /**
1531  * nfc_genl_init() - Initialize netlink interface
1532  *
1533  * This initialization function registers the nfc netlink family.
1534  */
1535 int __init nfc_genl_init(void)
1536 {
1537         int rc;
1538
1539         rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops,
1540                                            ARRAY_SIZE(nfc_genl_ops));
1541         if (rc)
1542                 return rc;
1543
1544         rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp);
1545
1546         netlink_register_notifier(&nl_notifier);
1547
1548         return rc;
1549 }
1550
1551 /**
1552  * nfc_genl_exit() - Deinitialize netlink interface
1553  *
1554  * This exit function unregisters the nfc netlink family.
1555  */
1556 void nfc_genl_exit(void)
1557 {
1558         netlink_unregister_notifier(&nl_notifier);
1559         genl_unregister_family(&nfc_genl_family);
1560 }