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