1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2011 Instituto Nokia de Tecnologia 4 * 5 * Authors: 6 * Lauro Ramos Venancio <lauro.venancio@openbossa.org> 7 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org> 8 * 9 * Vendor commands implementation based on net/wireless/nl80211.c 10 * which is: 11 * 12 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> 13 * Copyright 2013-2014 Intel Mobile Communications GmbH 14 */ 15 16 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ 17 18 #include <net/genetlink.h> 19 #include <linux/nfc.h> 20 #include <linux/slab.h> 21 22 #include "nfc.h" 23 #include "llcp.h" 24 25 static const struct genl_multicast_group nfc_genl_mcgrps[] = { 26 { .name = NFC_GENL_MCAST_EVENT_NAME, }, 27 }; 28 29 static struct genl_family nfc_genl_family; 30 static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = { 31 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 }, 32 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING, 33 .len = NFC_DEVICE_NAME_MAXSIZE }, 34 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 }, 35 [NFC_ATTR_TARGET_INDEX] = { .type = NLA_U32 }, 36 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 }, 37 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 }, 38 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 }, 39 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 }, 40 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 }, 41 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 }, 42 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 }, 43 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 }, 44 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED }, 45 [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING, 46 .len = NFC_FIRMWARE_NAME_MAXSIZE }, 47 [NFC_ATTR_SE_INDEX] = { .type = NLA_U32 }, 48 [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY }, 49 [NFC_ATTR_VENDOR_ID] = { .type = NLA_U32 }, 50 [NFC_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 }, 51 [NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY }, 52 53 }; 54 55 static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = { 56 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING, 57 .len = U8_MAX - 4 }, 58 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 }, 59 }; 60 61 static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target, 62 struct netlink_callback *cb, int flags) 63 { 64 void *hdr; 65 66 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 67 &nfc_genl_family, flags, NFC_CMD_GET_TARGET); 68 if (!hdr) 69 return -EMSGSIZE; 70 71 genl_dump_check_consistent(cb, hdr); 72 73 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) || 74 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) || 75 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) || 76 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res)) 77 goto nla_put_failure; 78 if (target->nfcid1_len > 0 && 79 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len, 80 target->nfcid1)) 81 goto nla_put_failure; 82 if (target->sensb_res_len > 0 && 83 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len, 84 target->sensb_res)) 85 goto nla_put_failure; 86 if (target->sensf_res_len > 0 && 87 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len, 88 target->sensf_res)) 89 goto nla_put_failure; 90 91 if (target->is_iso15693) { 92 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID, 93 target->iso15693_dsfid) || 94 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID, 95 sizeof(target->iso15693_uid), target->iso15693_uid)) 96 goto nla_put_failure; 97 } 98 99 if (target->ats_len > 0 && 100 nla_put(msg, NFC_ATTR_TARGET_ATS, target->ats_len, 101 target->ats)) 102 goto nla_put_failure; 103 104 genlmsg_end(msg, hdr); 105 return 0; 106 107 nla_put_failure: 108 genlmsg_cancel(msg, hdr); 109 return -EMSGSIZE; 110 } 111 112 static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb) 113 { 114 const struct genl_dumpit_info *info = genl_dumpit_info(cb); 115 struct nfc_dev *dev; 116 u32 idx; 117 118 if (!info->info.attrs[NFC_ATTR_DEVICE_INDEX]) 119 return ERR_PTR(-EINVAL); 120 121 idx = nla_get_u32(info->info.attrs[NFC_ATTR_DEVICE_INDEX]); 122 123 dev = nfc_get_device(idx); 124 if (!dev) 125 return ERR_PTR(-ENODEV); 126 127 return dev; 128 } 129 130 static int nfc_genl_dump_targets(struct sk_buff *skb, 131 struct netlink_callback *cb) 132 { 133 int i = cb->args[0]; 134 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; 135 int rc; 136 137 if (!dev) { 138 dev = __get_device_from_cb(cb); 139 if (IS_ERR(dev)) 140 return PTR_ERR(dev); 141 142 cb->args[1] = (long) dev; 143 } 144 145 device_lock(&dev->dev); 146 147 cb->seq = dev->targets_generation; 148 149 while (i < dev->n_targets) { 150 rc = nfc_genl_send_target(skb, &dev->targets[i], cb, 151 NLM_F_MULTI); 152 if (rc < 0) 153 break; 154 155 i++; 156 } 157 158 device_unlock(&dev->dev); 159 160 cb->args[0] = i; 161 162 return skb->len; 163 } 164 165 static int nfc_genl_dump_targets_done(struct netlink_callback *cb) 166 { 167 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; 168 169 if (dev) 170 nfc_put_device(dev); 171 172 return 0; 173 } 174 175 int nfc_genl_targets_found(struct nfc_dev *dev) 176 { 177 struct sk_buff *msg; 178 void *hdr; 179 180 dev->genl_data.poll_req_portid = 0; 181 182 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); 183 if (!msg) 184 return -ENOMEM; 185 186 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 187 NFC_EVENT_TARGETS_FOUND); 188 if (!hdr) 189 goto free_msg; 190 191 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) 192 goto nla_put_failure; 193 194 genlmsg_end(msg, hdr); 195 196 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); 197 198 nla_put_failure: 199 free_msg: 200 nlmsg_free(msg); 201 return -EMSGSIZE; 202 } 203 204 int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx) 205 { 206 struct sk_buff *msg; 207 void *hdr; 208 209 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 210 if (!msg) 211 return -ENOMEM; 212 213 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 214 NFC_EVENT_TARGET_LOST); 215 if (!hdr) 216 goto free_msg; 217 218 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || 219 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx)) 220 goto nla_put_failure; 221 222 genlmsg_end(msg, hdr); 223 224 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 225 226 return 0; 227 228 nla_put_failure: 229 free_msg: 230 nlmsg_free(msg); 231 return -EMSGSIZE; 232 } 233 234 int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol) 235 { 236 struct sk_buff *msg; 237 void *hdr; 238 239 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 240 if (!msg) 241 return -ENOMEM; 242 243 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 244 NFC_EVENT_TM_ACTIVATED); 245 if (!hdr) 246 goto free_msg; 247 248 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) 249 goto nla_put_failure; 250 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol)) 251 goto nla_put_failure; 252 253 genlmsg_end(msg, hdr); 254 255 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 256 257 return 0; 258 259 nla_put_failure: 260 free_msg: 261 nlmsg_free(msg); 262 return -EMSGSIZE; 263 } 264 265 int nfc_genl_tm_deactivated(struct nfc_dev *dev) 266 { 267 struct sk_buff *msg; 268 void *hdr; 269 270 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 271 if (!msg) 272 return -ENOMEM; 273 274 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 275 NFC_EVENT_TM_DEACTIVATED); 276 if (!hdr) 277 goto free_msg; 278 279 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) 280 goto nla_put_failure; 281 282 genlmsg_end(msg, hdr); 283 284 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 285 286 return 0; 287 288 nla_put_failure: 289 free_msg: 290 nlmsg_free(msg); 291 return -EMSGSIZE; 292 } 293 294 static int nfc_genl_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg) 295 { 296 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || 297 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || 298 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) || 299 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) || 300 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode)) 301 return -1; 302 return 0; 303 } 304 305 int nfc_genl_device_added(struct nfc_dev *dev) 306 { 307 struct sk_buff *msg; 308 void *hdr; 309 310 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 311 if (!msg) 312 return -ENOMEM; 313 314 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 315 NFC_EVENT_DEVICE_ADDED); 316 if (!hdr) 317 goto free_msg; 318 319 if (nfc_genl_setup_device_added(dev, msg)) 320 goto nla_put_failure; 321 322 genlmsg_end(msg, hdr); 323 324 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 325 326 return 0; 327 328 nla_put_failure: 329 free_msg: 330 nlmsg_free(msg); 331 return -EMSGSIZE; 332 } 333 334 int nfc_genl_device_removed(struct nfc_dev *dev) 335 { 336 struct sk_buff *msg; 337 void *hdr; 338 339 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 340 if (!msg) 341 return -ENOMEM; 342 343 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 344 NFC_EVENT_DEVICE_REMOVED); 345 if (!hdr) 346 goto free_msg; 347 348 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) 349 goto nla_put_failure; 350 351 genlmsg_end(msg, hdr); 352 353 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 354 355 return 0; 356 357 nla_put_failure: 358 free_msg: 359 nlmsg_free(msg); 360 return -EMSGSIZE; 361 } 362 363 int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list) 364 { 365 struct sk_buff *msg; 366 struct nlattr *sdp_attr, *uri_attr; 367 struct nfc_llcp_sdp_tlv *sdres; 368 struct hlist_node *n; 369 void *hdr; 370 int rc = -EMSGSIZE; 371 int i; 372 373 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 374 if (!msg) 375 return -ENOMEM; 376 377 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 378 NFC_EVENT_LLC_SDRES); 379 if (!hdr) 380 goto free_msg; 381 382 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) 383 goto nla_put_failure; 384 385 sdp_attr = nla_nest_start_noflag(msg, NFC_ATTR_LLC_SDP); 386 if (sdp_attr == NULL) { 387 rc = -ENOMEM; 388 goto nla_put_failure; 389 } 390 391 i = 1; 392 hlist_for_each_entry_safe(sdres, n, sdres_list, node) { 393 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap); 394 395 uri_attr = nla_nest_start_noflag(msg, i++); 396 if (uri_attr == NULL) { 397 rc = -ENOMEM; 398 goto nla_put_failure; 399 } 400 401 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap)) 402 goto nla_put_failure; 403 404 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri)) 405 goto nla_put_failure; 406 407 nla_nest_end(msg, uri_attr); 408 409 hlist_del(&sdres->node); 410 411 nfc_llcp_free_sdp_tlv(sdres); 412 } 413 414 nla_nest_end(msg, sdp_attr); 415 416 genlmsg_end(msg, hdr); 417 418 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); 419 420 nla_put_failure: 421 free_msg: 422 nlmsg_free(msg); 423 424 nfc_llcp_free_sdp_tlv_list(sdres_list); 425 426 return rc; 427 } 428 429 int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type) 430 { 431 struct sk_buff *msg; 432 void *hdr; 433 434 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 435 if (!msg) 436 return -ENOMEM; 437 438 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 439 NFC_EVENT_SE_ADDED); 440 if (!hdr) 441 goto free_msg; 442 443 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || 444 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) || 445 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type)) 446 goto nla_put_failure; 447 448 genlmsg_end(msg, hdr); 449 450 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 451 452 return 0; 453 454 nla_put_failure: 455 free_msg: 456 nlmsg_free(msg); 457 return -EMSGSIZE; 458 } 459 460 int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx) 461 { 462 struct sk_buff *msg; 463 void *hdr; 464 465 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 466 if (!msg) 467 return -ENOMEM; 468 469 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 470 NFC_EVENT_SE_REMOVED); 471 if (!hdr) 472 goto free_msg; 473 474 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || 475 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx)) 476 goto nla_put_failure; 477 478 genlmsg_end(msg, hdr); 479 480 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 481 482 return 0; 483 484 nla_put_failure: 485 free_msg: 486 nlmsg_free(msg); 487 return -EMSGSIZE; 488 } 489 490 int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx, 491 struct nfc_evt_transaction *evt_transaction) 492 { 493 struct nfc_se *se; 494 struct sk_buff *msg; 495 void *hdr; 496 497 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 498 if (!msg) 499 return -ENOMEM; 500 501 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 502 NFC_EVENT_SE_TRANSACTION); 503 if (!hdr) 504 goto free_msg; 505 506 se = nfc_find_se(dev, se_idx); 507 if (!se) 508 goto free_msg; 509 510 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || 511 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) || 512 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) || 513 nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len, 514 evt_transaction->aid) || 515 nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len, 516 evt_transaction->params)) 517 goto nla_put_failure; 518 519 /* evt_transaction is no more used */ 520 devm_kfree(&dev->dev, evt_transaction); 521 522 genlmsg_end(msg, hdr); 523 524 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 525 526 return 0; 527 528 nla_put_failure: 529 free_msg: 530 /* evt_transaction is no more used */ 531 devm_kfree(&dev->dev, evt_transaction); 532 nlmsg_free(msg); 533 return -EMSGSIZE; 534 } 535 536 int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx) 537 { 538 const struct nfc_se *se; 539 struct sk_buff *msg; 540 void *hdr; 541 542 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 543 if (!msg) 544 return -ENOMEM; 545 546 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 547 NFC_EVENT_SE_CONNECTIVITY); 548 if (!hdr) 549 goto free_msg; 550 551 se = nfc_find_se(dev, se_idx); 552 if (!se) 553 goto free_msg; 554 555 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || 556 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) || 557 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type)) 558 goto nla_put_failure; 559 560 genlmsg_end(msg, hdr); 561 562 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 563 564 return 0; 565 566 nla_put_failure: 567 free_msg: 568 nlmsg_free(msg); 569 return -EMSGSIZE; 570 } 571 572 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev, 573 u32 portid, u32 seq, 574 struct netlink_callback *cb, 575 int flags) 576 { 577 void *hdr; 578 579 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags, 580 NFC_CMD_GET_DEVICE); 581 if (!hdr) 582 return -EMSGSIZE; 583 584 if (cb) 585 genl_dump_check_consistent(cb, hdr); 586 587 if (nfc_genl_setup_device_added(dev, msg)) 588 goto nla_put_failure; 589 590 genlmsg_end(msg, hdr); 591 return 0; 592 593 nla_put_failure: 594 genlmsg_cancel(msg, hdr); 595 return -EMSGSIZE; 596 } 597 598 static int nfc_genl_dump_devices(struct sk_buff *skb, 599 struct netlink_callback *cb) 600 { 601 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; 602 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; 603 bool first_call = false; 604 605 if (!iter) { 606 first_call = true; 607 iter = kmalloc_obj(struct class_dev_iter); 608 if (!iter) 609 return -ENOMEM; 610 cb->args[0] = (long) iter; 611 } 612 613 mutex_lock(&nfc_devlist_mutex); 614 615 cb->seq = nfc_devlist_generation; 616 617 if (first_call) { 618 nfc_device_iter_init(iter); 619 dev = nfc_device_iter_next(iter); 620 } 621 622 while (dev) { 623 int rc; 624 625 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid, 626 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); 627 if (rc < 0) 628 break; 629 630 dev = nfc_device_iter_next(iter); 631 } 632 633 mutex_unlock(&nfc_devlist_mutex); 634 635 cb->args[1] = (long) dev; 636 637 return skb->len; 638 } 639 640 static int nfc_genl_dump_devices_done(struct netlink_callback *cb) 641 { 642 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; 643 644 if (iter) { 645 nfc_device_iter_exit(iter); 646 kfree(iter); 647 } 648 649 return 0; 650 } 651 652 int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx, 653 u8 comm_mode, u8 rf_mode) 654 { 655 struct sk_buff *msg; 656 void *hdr; 657 658 pr_debug("DEP link is up\n"); 659 660 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); 661 if (!msg) 662 return -ENOMEM; 663 664 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP); 665 if (!hdr) 666 goto free_msg; 667 668 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) 669 goto nla_put_failure; 670 if (rf_mode == NFC_RF_INITIATOR && 671 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx)) 672 goto nla_put_failure; 673 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) || 674 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode)) 675 goto nla_put_failure; 676 677 genlmsg_end(msg, hdr); 678 679 dev->dep_link_up = true; 680 681 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); 682 683 return 0; 684 685 nla_put_failure: 686 free_msg: 687 nlmsg_free(msg); 688 return -EMSGSIZE; 689 } 690 691 int nfc_genl_dep_link_down_event(struct nfc_dev *dev) 692 { 693 struct sk_buff *msg; 694 void *hdr; 695 696 pr_debug("DEP link is down\n"); 697 698 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); 699 if (!msg) 700 return -ENOMEM; 701 702 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 703 NFC_CMD_DEP_LINK_DOWN); 704 if (!hdr) 705 goto free_msg; 706 707 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) 708 goto nla_put_failure; 709 710 genlmsg_end(msg, hdr); 711 712 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); 713 714 return 0; 715 716 nla_put_failure: 717 free_msg: 718 nlmsg_free(msg); 719 return -EMSGSIZE; 720 } 721 722 static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info) 723 { 724 struct sk_buff *msg; 725 struct nfc_dev *dev; 726 u32 idx; 727 int rc = -ENOBUFS; 728 729 if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) 730 return -EINVAL; 731 732 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 733 734 dev = nfc_get_device(idx); 735 if (!dev) 736 return -ENODEV; 737 738 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 739 if (!msg) { 740 rc = -ENOMEM; 741 goto out_putdev; 742 } 743 744 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq, 745 NULL, 0); 746 if (rc < 0) 747 goto out_free; 748 749 nfc_put_device(dev); 750 751 return genlmsg_reply(msg, info); 752 753 out_free: 754 nlmsg_free(msg); 755 out_putdev: 756 nfc_put_device(dev); 757 return rc; 758 } 759 760 static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info) 761 { 762 struct nfc_dev *dev; 763 int rc; 764 u32 idx; 765 766 if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) 767 return -EINVAL; 768 769 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 770 771 dev = nfc_get_device(idx); 772 if (!dev) 773 return -ENODEV; 774 775 rc = nfc_dev_up(dev); 776 777 nfc_put_device(dev); 778 return rc; 779 } 780 781 static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info) 782 { 783 struct nfc_dev *dev; 784 int rc; 785 u32 idx; 786 787 if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) 788 return -EINVAL; 789 790 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 791 792 dev = nfc_get_device(idx); 793 if (!dev) 794 return -ENODEV; 795 796 rc = nfc_dev_down(dev); 797 798 nfc_put_device(dev); 799 return rc; 800 } 801 802 static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info) 803 { 804 struct nfc_dev *dev; 805 int rc; 806 u32 idx; 807 u32 im_protocols = 0, tm_protocols = 0; 808 809 pr_debug("Poll start\n"); 810 811 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 812 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] && 813 !info->attrs[NFC_ATTR_PROTOCOLS]) && 814 !info->attrs[NFC_ATTR_TM_PROTOCOLS])) 815 return -EINVAL; 816 817 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 818 819 if (info->attrs[NFC_ATTR_TM_PROTOCOLS]) 820 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]); 821 822 if (info->attrs[NFC_ATTR_IM_PROTOCOLS]) 823 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]); 824 else if (info->attrs[NFC_ATTR_PROTOCOLS]) 825 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); 826 827 dev = nfc_get_device(idx); 828 if (!dev) 829 return -ENODEV; 830 831 mutex_lock(&dev->genl_data.genl_data_mutex); 832 833 rc = nfc_start_poll(dev, im_protocols, tm_protocols); 834 if (!rc) 835 dev->genl_data.poll_req_portid = info->snd_portid; 836 837 mutex_unlock(&dev->genl_data.genl_data_mutex); 838 839 nfc_put_device(dev); 840 return rc; 841 } 842 843 static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info) 844 { 845 struct nfc_dev *dev; 846 int rc; 847 u32 idx; 848 849 if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) 850 return -EINVAL; 851 852 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 853 854 dev = nfc_get_device(idx); 855 if (!dev) 856 return -ENODEV; 857 858 device_lock(&dev->dev); 859 860 if (!dev->polling) { 861 device_unlock(&dev->dev); 862 nfc_put_device(dev); 863 return -EINVAL; 864 } 865 866 device_unlock(&dev->dev); 867 868 mutex_lock(&dev->genl_data.genl_data_mutex); 869 870 if (dev->genl_data.poll_req_portid != info->snd_portid) { 871 rc = -EBUSY; 872 goto out; 873 } 874 875 rc = nfc_stop_poll(dev); 876 dev->genl_data.poll_req_portid = 0; 877 878 out: 879 mutex_unlock(&dev->genl_data.genl_data_mutex); 880 nfc_put_device(dev); 881 return rc; 882 } 883 884 static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info) 885 { 886 struct nfc_dev *dev; 887 u32 device_idx, target_idx, protocol; 888 int rc; 889 890 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 891 !info->attrs[NFC_ATTR_TARGET_INDEX] || 892 !info->attrs[NFC_ATTR_PROTOCOLS]) 893 return -EINVAL; 894 895 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 896 897 dev = nfc_get_device(device_idx); 898 if (!dev) 899 return -ENODEV; 900 901 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); 902 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); 903 904 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP); 905 rc = nfc_activate_target(dev, target_idx, protocol); 906 907 nfc_put_device(dev); 908 return rc; 909 } 910 911 static int nfc_genl_deactivate_target(struct sk_buff *skb, 912 struct genl_info *info) 913 { 914 struct nfc_dev *dev; 915 u32 device_idx, target_idx; 916 int rc; 917 918 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 919 !info->attrs[NFC_ATTR_TARGET_INDEX]) 920 return -EINVAL; 921 922 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 923 924 dev = nfc_get_device(device_idx); 925 if (!dev) 926 return -ENODEV; 927 928 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); 929 930 rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP); 931 932 nfc_put_device(dev); 933 return rc; 934 } 935 936 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info) 937 { 938 struct nfc_dev *dev; 939 int rc, tgt_idx; 940 u32 idx; 941 u8 comm; 942 943 pr_debug("DEP link up\n"); 944 945 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 946 !info->attrs[NFC_ATTR_COMM_MODE]) 947 return -EINVAL; 948 949 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 950 if (!info->attrs[NFC_ATTR_TARGET_INDEX]) 951 tgt_idx = NFC_TARGET_IDX_ANY; 952 else 953 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); 954 955 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]); 956 957 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE) 958 return -EINVAL; 959 960 dev = nfc_get_device(idx); 961 if (!dev) 962 return -ENODEV; 963 964 rc = nfc_dep_link_up(dev, tgt_idx, comm); 965 966 nfc_put_device(dev); 967 968 return rc; 969 } 970 971 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) 972 { 973 struct nfc_dev *dev; 974 int rc; 975 u32 idx; 976 977 if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) 978 return -EINVAL; 979 980 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 981 982 dev = nfc_get_device(idx); 983 if (!dev) 984 return -ENODEV; 985 986 rc = nfc_dep_link_down(dev); 987 988 nfc_put_device(dev); 989 return rc; 990 } 991 992 static int nfc_genl_send_params(struct sk_buff *msg, 993 struct nfc_llcp_local *local, 994 u32 portid, u32 seq) 995 { 996 void *hdr; 997 998 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0, 999 NFC_CMD_LLC_GET_PARAMS); 1000 if (!hdr) 1001 return -EMSGSIZE; 1002 1003 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) || 1004 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) || 1005 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) || 1006 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux))) 1007 goto nla_put_failure; 1008 1009 genlmsg_end(msg, hdr); 1010 return 0; 1011 1012 nla_put_failure: 1013 genlmsg_cancel(msg, hdr); 1014 return -EMSGSIZE; 1015 } 1016 1017 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info) 1018 { 1019 struct nfc_dev *dev; 1020 struct nfc_llcp_local *local; 1021 int rc = 0; 1022 struct sk_buff *msg = NULL; 1023 u32 idx; 1024 1025 if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) 1026 return -EINVAL; 1027 1028 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1029 1030 dev = nfc_get_device(idx); 1031 if (!dev) 1032 return -ENODEV; 1033 1034 device_lock(&dev->dev); 1035 1036 local = nfc_llcp_find_local(dev); 1037 if (!local) { 1038 rc = -ENODEV; 1039 goto exit; 1040 } 1041 1042 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1043 if (!msg) { 1044 rc = -ENOMEM; 1045 goto put_local; 1046 } 1047 1048 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq); 1049 1050 put_local: 1051 nfc_llcp_local_put(local); 1052 1053 exit: 1054 device_unlock(&dev->dev); 1055 1056 nfc_put_device(dev); 1057 1058 if (rc < 0) { 1059 if (msg) 1060 nlmsg_free(msg); 1061 1062 return rc; 1063 } 1064 1065 return genlmsg_reply(msg, info); 1066 } 1067 1068 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info) 1069 { 1070 struct nfc_dev *dev; 1071 struct nfc_llcp_local *local; 1072 u8 rw = 0; 1073 u16 miux = 0; 1074 u32 idx; 1075 int rc = 0; 1076 1077 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1078 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] && 1079 !info->attrs[NFC_ATTR_LLC_PARAM_RW] && 1080 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX])) 1081 return -EINVAL; 1082 1083 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) { 1084 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]); 1085 1086 if (rw > LLCP_MAX_RW) 1087 return -EINVAL; 1088 } 1089 1090 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) { 1091 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]); 1092 1093 if (miux > LLCP_MAX_MIUX) 1094 return -EINVAL; 1095 } 1096 1097 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1098 1099 dev = nfc_get_device(idx); 1100 if (!dev) 1101 return -ENODEV; 1102 1103 device_lock(&dev->dev); 1104 1105 local = nfc_llcp_find_local(dev); 1106 if (!local) { 1107 rc = -ENODEV; 1108 goto exit; 1109 } 1110 1111 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) { 1112 if (dev->dep_link_up) { 1113 rc = -EINPROGRESS; 1114 goto put_local; 1115 } 1116 1117 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]); 1118 } 1119 1120 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) 1121 local->rw = rw; 1122 1123 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) 1124 local->miux = cpu_to_be16(miux); 1125 1126 put_local: 1127 nfc_llcp_local_put(local); 1128 1129 exit: 1130 device_unlock(&dev->dev); 1131 1132 nfc_put_device(dev); 1133 1134 return rc; 1135 } 1136 1137 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info) 1138 { 1139 struct nfc_dev *dev; 1140 struct nfc_llcp_local *local; 1141 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1]; 1142 u32 idx; 1143 u8 tid; 1144 char *uri; 1145 int rc = 0, rem; 1146 size_t uri_len, tlvs_len; 1147 struct hlist_head sdreq_list; 1148 struct nfc_llcp_sdp_tlv *sdreq; 1149 1150 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1151 !info->attrs[NFC_ATTR_LLC_SDP]) 1152 return -EINVAL; 1153 1154 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1155 1156 dev = nfc_get_device(idx); 1157 if (!dev) 1158 return -ENODEV; 1159 1160 device_lock(&dev->dev); 1161 1162 if (dev->dep_link_up == false) { 1163 rc = -ENOLINK; 1164 goto exit; 1165 } 1166 1167 local = nfc_llcp_find_local(dev); 1168 if (!local) { 1169 rc = -ENODEV; 1170 goto exit; 1171 } 1172 1173 INIT_HLIST_HEAD(&sdreq_list); 1174 1175 tlvs_len = 0; 1176 1177 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) { 1178 rc = nla_parse_nested_deprecated(sdp_attrs, NFC_SDP_ATTR_MAX, 1179 attr, nfc_sdp_genl_policy, 1180 info->extack); 1181 1182 if (rc != 0) { 1183 rc = -EINVAL; 1184 goto free_list; 1185 } 1186 1187 if (!sdp_attrs[NFC_SDP_ATTR_URI]) 1188 continue; 1189 1190 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]); 1191 if (uri_len == 0) 1192 continue; 1193 1194 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]); 1195 if (*uri == 0) 1196 continue; 1197 1198 tid = local->sdreq_next_tid++; 1199 1200 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len); 1201 if (sdreq == NULL) { 1202 rc = -ENOMEM; 1203 goto free_list; 1204 } 1205 1206 tlvs_len += sdreq->tlv_len; 1207 1208 hlist_add_head(&sdreq->node, &sdreq_list); 1209 } 1210 1211 if (hlist_empty(&sdreq_list)) { 1212 rc = -EINVAL; 1213 goto put_local; 1214 } 1215 1216 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len); 1217 1218 free_list: 1219 nfc_llcp_free_sdp_tlv_list(&sdreq_list); 1220 1221 put_local: 1222 nfc_llcp_local_put(local); 1223 1224 exit: 1225 device_unlock(&dev->dev); 1226 1227 nfc_put_device(dev); 1228 1229 return rc; 1230 } 1231 1232 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info) 1233 { 1234 struct nfc_dev *dev; 1235 int rc; 1236 u32 idx; 1237 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1]; 1238 1239 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || !info->attrs[NFC_ATTR_FIRMWARE_NAME]) 1240 return -EINVAL; 1241 1242 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1243 1244 dev = nfc_get_device(idx); 1245 if (!dev) 1246 return -ENODEV; 1247 1248 nla_strscpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME], 1249 sizeof(firmware_name)); 1250 1251 rc = nfc_fw_download(dev, firmware_name); 1252 1253 nfc_put_device(dev); 1254 return rc; 1255 } 1256 1257 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name, 1258 u32 result) 1259 { 1260 struct sk_buff *msg; 1261 void *hdr; 1262 1263 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); 1264 if (!msg) 1265 return -ENOMEM; 1266 1267 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 1268 NFC_CMD_FW_DOWNLOAD); 1269 if (!hdr) 1270 goto free_msg; 1271 1272 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) || 1273 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) || 1274 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) 1275 goto nla_put_failure; 1276 1277 genlmsg_end(msg, hdr); 1278 1279 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); 1280 1281 return 0; 1282 1283 nla_put_failure: 1284 free_msg: 1285 nlmsg_free(msg); 1286 return -EMSGSIZE; 1287 } 1288 1289 static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info) 1290 { 1291 struct nfc_dev *dev; 1292 int rc; 1293 u32 idx, se_idx; 1294 1295 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1296 !info->attrs[NFC_ATTR_SE_INDEX]) 1297 return -EINVAL; 1298 1299 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1300 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); 1301 1302 dev = nfc_get_device(idx); 1303 if (!dev) 1304 return -ENODEV; 1305 1306 rc = nfc_enable_se(dev, se_idx); 1307 1308 nfc_put_device(dev); 1309 return rc; 1310 } 1311 1312 static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info) 1313 { 1314 struct nfc_dev *dev; 1315 int rc; 1316 u32 idx, se_idx; 1317 1318 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1319 !info->attrs[NFC_ATTR_SE_INDEX]) 1320 return -EINVAL; 1321 1322 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1323 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); 1324 1325 dev = nfc_get_device(idx); 1326 if (!dev) 1327 return -ENODEV; 1328 1329 rc = nfc_disable_se(dev, se_idx); 1330 1331 nfc_put_device(dev); 1332 return rc; 1333 } 1334 1335 static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev, 1336 u32 portid, u32 seq, 1337 struct netlink_callback *cb, 1338 int flags) 1339 { 1340 void *hdr; 1341 struct nfc_se *se, *n; 1342 1343 list_for_each_entry_safe(se, n, &dev->secure_elements, list) { 1344 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags, 1345 NFC_CMD_GET_SE); 1346 if (!hdr) 1347 goto nla_put_failure; 1348 1349 if (cb) 1350 genl_dump_check_consistent(cb, hdr); 1351 1352 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || 1353 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) || 1354 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type)) 1355 goto nla_put_failure; 1356 1357 genlmsg_end(msg, hdr); 1358 } 1359 1360 return 0; 1361 1362 nla_put_failure: 1363 genlmsg_cancel(msg, hdr); 1364 return -EMSGSIZE; 1365 } 1366 1367 static int nfc_genl_dump_ses(struct sk_buff *skb, 1368 struct netlink_callback *cb) 1369 { 1370 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; 1371 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; 1372 bool first_call = false; 1373 1374 if (!iter) { 1375 first_call = true; 1376 iter = kmalloc_obj(struct class_dev_iter); 1377 if (!iter) 1378 return -ENOMEM; 1379 cb->args[0] = (long) iter; 1380 } 1381 1382 mutex_lock(&nfc_devlist_mutex); 1383 1384 cb->seq = nfc_devlist_generation; 1385 1386 if (first_call) { 1387 nfc_device_iter_init(iter); 1388 dev = nfc_device_iter_next(iter); 1389 } 1390 1391 while (dev) { 1392 int rc; 1393 1394 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid, 1395 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); 1396 if (rc < 0) 1397 break; 1398 1399 dev = nfc_device_iter_next(iter); 1400 } 1401 1402 mutex_unlock(&nfc_devlist_mutex); 1403 1404 cb->args[1] = (long) dev; 1405 1406 return skb->len; 1407 } 1408 1409 static int nfc_genl_dump_ses_done(struct netlink_callback *cb) 1410 { 1411 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; 1412 1413 if (iter) { 1414 nfc_device_iter_exit(iter); 1415 kfree(iter); 1416 } 1417 1418 return 0; 1419 } 1420 1421 static int nfc_se_io(struct nfc_dev *dev, u32 se_idx, 1422 u8 *apdu, size_t apdu_length, 1423 se_io_cb_t cb, void *cb_context) 1424 { 1425 struct nfc_se *se; 1426 int rc; 1427 1428 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); 1429 1430 device_lock(&dev->dev); 1431 1432 if (!device_is_registered(&dev->dev)) { 1433 rc = -ENODEV; 1434 goto error; 1435 } 1436 1437 if (!dev->dev_up) { 1438 rc = -ENODEV; 1439 goto error; 1440 } 1441 1442 if (!dev->ops->se_io) { 1443 rc = -EOPNOTSUPP; 1444 goto error; 1445 } 1446 1447 se = nfc_find_se(dev, se_idx); 1448 if (!se) { 1449 rc = -EINVAL; 1450 goto error; 1451 } 1452 1453 if (se->state != NFC_SE_ENABLED) { 1454 rc = -ENODEV; 1455 goto error; 1456 } 1457 1458 rc = dev->ops->se_io(dev, se_idx, apdu, 1459 apdu_length, cb, cb_context); 1460 1461 device_unlock(&dev->dev); 1462 return rc; 1463 1464 error: 1465 device_unlock(&dev->dev); 1466 kfree(cb_context); 1467 return rc; 1468 } 1469 1470 struct se_io_ctx { 1471 u32 dev_idx; 1472 u32 se_idx; 1473 }; 1474 1475 static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err) 1476 { 1477 struct se_io_ctx *ctx = context; 1478 struct sk_buff *msg; 1479 void *hdr; 1480 1481 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1482 if (!msg) { 1483 kfree(ctx); 1484 return; 1485 } 1486 1487 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 1488 NFC_CMD_SE_IO); 1489 if (!hdr) 1490 goto free_msg; 1491 1492 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) || 1493 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) || 1494 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu)) 1495 goto nla_put_failure; 1496 1497 genlmsg_end(msg, hdr); 1498 1499 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 1500 1501 kfree(ctx); 1502 1503 return; 1504 1505 nla_put_failure: 1506 free_msg: 1507 nlmsg_free(msg); 1508 kfree(ctx); 1509 1510 return; 1511 } 1512 1513 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info) 1514 { 1515 struct nfc_dev *dev; 1516 struct se_io_ctx *ctx; 1517 u32 dev_idx, se_idx; 1518 u8 *apdu; 1519 size_t apdu_len; 1520 int rc; 1521 1522 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1523 !info->attrs[NFC_ATTR_SE_INDEX] || 1524 !info->attrs[NFC_ATTR_SE_APDU]) 1525 return -EINVAL; 1526 1527 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1528 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); 1529 1530 dev = nfc_get_device(dev_idx); 1531 if (!dev) 1532 return -ENODEV; 1533 1534 if (!dev->ops || !dev->ops->se_io) { 1535 rc = -EOPNOTSUPP; 1536 goto put_dev; 1537 } 1538 1539 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]); 1540 if (apdu_len == 0) { 1541 rc = -EINVAL; 1542 goto put_dev; 1543 } 1544 1545 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]); 1546 1547 ctx = kzalloc_obj(struct se_io_ctx); 1548 if (!ctx) { 1549 rc = -ENOMEM; 1550 goto put_dev; 1551 } 1552 1553 ctx->dev_idx = dev_idx; 1554 ctx->se_idx = se_idx; 1555 1556 rc = nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx); 1557 1558 put_dev: 1559 nfc_put_device(dev); 1560 return rc; 1561 } 1562 1563 static int nfc_genl_vendor_cmd(struct sk_buff *skb, 1564 struct genl_info *info) 1565 { 1566 struct nfc_dev *dev; 1567 const struct nfc_vendor_cmd *cmd; 1568 u32 dev_idx, vid, subcmd; 1569 u8 *data; 1570 size_t data_len; 1571 int i, err; 1572 1573 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1574 !info->attrs[NFC_ATTR_VENDOR_ID] || 1575 !info->attrs[NFC_ATTR_VENDOR_SUBCMD]) 1576 return -EINVAL; 1577 1578 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1579 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]); 1580 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]); 1581 1582 dev = nfc_get_device(dev_idx); 1583 if (!dev) 1584 return -ENODEV; 1585 1586 if (!dev->vendor_cmds || !dev->n_vendor_cmds) { 1587 err = -ENODEV; 1588 goto put_dev; 1589 } 1590 1591 if (info->attrs[NFC_ATTR_VENDOR_DATA]) { 1592 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]); 1593 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]); 1594 if (data_len == 0) { 1595 err = -EINVAL; 1596 goto put_dev; 1597 } 1598 } else { 1599 data = NULL; 1600 data_len = 0; 1601 } 1602 1603 for (i = 0; i < dev->n_vendor_cmds; i++) { 1604 cmd = &dev->vendor_cmds[i]; 1605 1606 if (cmd->vendor_id != vid || cmd->subcmd != subcmd) 1607 continue; 1608 1609 dev->cur_cmd_info = info; 1610 err = cmd->doit(dev, data, data_len); 1611 dev->cur_cmd_info = NULL; 1612 goto put_dev; 1613 } 1614 1615 err = -EOPNOTSUPP; 1616 1617 put_dev: 1618 nfc_put_device(dev); 1619 return err; 1620 } 1621 1622 /* message building helper */ 1623 static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq, 1624 int flags, u8 cmd) 1625 { 1626 /* since there is no private header just add the generic one */ 1627 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd); 1628 } 1629 1630 static struct sk_buff * 1631 __nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen, 1632 u32 portid, u32 seq, 1633 enum nfc_attrs attr, 1634 u32 oui, u32 subcmd, gfp_t gfp) 1635 { 1636 struct sk_buff *skb; 1637 void *hdr; 1638 1639 skb = nlmsg_new(approxlen + 100, gfp); 1640 if (!skb) 1641 return NULL; 1642 1643 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR); 1644 if (!hdr) { 1645 kfree_skb(skb); 1646 return NULL; 1647 } 1648 1649 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx)) 1650 goto nla_put_failure; 1651 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui)) 1652 goto nla_put_failure; 1653 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd)) 1654 goto nla_put_failure; 1655 1656 ((void **)skb->cb)[0] = dev; 1657 ((void **)skb->cb)[1] = hdr; 1658 1659 return skb; 1660 1661 nla_put_failure: 1662 kfree_skb(skb); 1663 return NULL; 1664 } 1665 1666 struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev, 1667 enum nfc_attrs attr, 1668 u32 oui, u32 subcmd, 1669 int approxlen) 1670 { 1671 if (WARN_ON(!dev->cur_cmd_info)) 1672 return NULL; 1673 1674 return __nfc_alloc_vendor_cmd_skb(dev, approxlen, 1675 dev->cur_cmd_info->snd_portid, 1676 dev->cur_cmd_info->snd_seq, attr, 1677 oui, subcmd, GFP_KERNEL); 1678 } 1679 EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb); 1680 1681 int nfc_vendor_cmd_reply(struct sk_buff *skb) 1682 { 1683 struct nfc_dev *dev = ((void **)skb->cb)[0]; 1684 void *hdr = ((void **)skb->cb)[1]; 1685 1686 /* clear CB data for netlink core to own from now on */ 1687 memset(skb->cb, 0, sizeof(skb->cb)); 1688 1689 if (WARN_ON(!dev->cur_cmd_info)) { 1690 kfree_skb(skb); 1691 return -EINVAL; 1692 } 1693 1694 genlmsg_end(skb, hdr); 1695 return genlmsg_reply(skb, dev->cur_cmd_info); 1696 } 1697 EXPORT_SYMBOL(nfc_vendor_cmd_reply); 1698 1699 static const struct genl_ops nfc_genl_ops[] = { 1700 { 1701 .cmd = NFC_CMD_GET_DEVICE, 1702 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1703 .doit = nfc_genl_get_device, 1704 .dumpit = nfc_genl_dump_devices, 1705 .done = nfc_genl_dump_devices_done, 1706 }, 1707 { 1708 .cmd = NFC_CMD_DEV_UP, 1709 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1710 .doit = nfc_genl_dev_up, 1711 .flags = GENL_ADMIN_PERM, 1712 }, 1713 { 1714 .cmd = NFC_CMD_DEV_DOWN, 1715 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1716 .doit = nfc_genl_dev_down, 1717 .flags = GENL_ADMIN_PERM, 1718 }, 1719 { 1720 .cmd = NFC_CMD_START_POLL, 1721 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1722 .doit = nfc_genl_start_poll, 1723 .flags = GENL_ADMIN_PERM, 1724 }, 1725 { 1726 .cmd = NFC_CMD_STOP_POLL, 1727 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1728 .doit = nfc_genl_stop_poll, 1729 .flags = GENL_ADMIN_PERM, 1730 }, 1731 { 1732 .cmd = NFC_CMD_DEP_LINK_UP, 1733 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1734 .doit = nfc_genl_dep_link_up, 1735 .flags = GENL_ADMIN_PERM, 1736 }, 1737 { 1738 .cmd = NFC_CMD_DEP_LINK_DOWN, 1739 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1740 .doit = nfc_genl_dep_link_down, 1741 .flags = GENL_ADMIN_PERM, 1742 }, 1743 { 1744 .cmd = NFC_CMD_GET_TARGET, 1745 .validate = GENL_DONT_VALIDATE_STRICT | 1746 GENL_DONT_VALIDATE_DUMP_STRICT, 1747 .dumpit = nfc_genl_dump_targets, 1748 .done = nfc_genl_dump_targets_done, 1749 }, 1750 { 1751 .cmd = NFC_CMD_LLC_GET_PARAMS, 1752 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1753 .doit = nfc_genl_llc_get_params, 1754 }, 1755 { 1756 .cmd = NFC_CMD_LLC_SET_PARAMS, 1757 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1758 .doit = nfc_genl_llc_set_params, 1759 .flags = GENL_ADMIN_PERM, 1760 }, 1761 { 1762 .cmd = NFC_CMD_LLC_SDREQ, 1763 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1764 .doit = nfc_genl_llc_sdreq, 1765 .flags = GENL_ADMIN_PERM, 1766 }, 1767 { 1768 .cmd = NFC_CMD_FW_DOWNLOAD, 1769 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1770 .doit = nfc_genl_fw_download, 1771 .flags = GENL_ADMIN_PERM, 1772 }, 1773 { 1774 .cmd = NFC_CMD_ENABLE_SE, 1775 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1776 .doit = nfc_genl_enable_se, 1777 .flags = GENL_ADMIN_PERM, 1778 }, 1779 { 1780 .cmd = NFC_CMD_DISABLE_SE, 1781 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1782 .doit = nfc_genl_disable_se, 1783 .flags = GENL_ADMIN_PERM, 1784 }, 1785 { 1786 .cmd = NFC_CMD_GET_SE, 1787 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1788 .dumpit = nfc_genl_dump_ses, 1789 .done = nfc_genl_dump_ses_done, 1790 }, 1791 { 1792 .cmd = NFC_CMD_SE_IO, 1793 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1794 .doit = nfc_genl_se_io, 1795 .flags = GENL_ADMIN_PERM, 1796 }, 1797 { 1798 .cmd = NFC_CMD_ACTIVATE_TARGET, 1799 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1800 .doit = nfc_genl_activate_target, 1801 .flags = GENL_ADMIN_PERM, 1802 }, 1803 { 1804 .cmd = NFC_CMD_VENDOR, 1805 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1806 .doit = nfc_genl_vendor_cmd, 1807 .flags = GENL_ADMIN_PERM, 1808 }, 1809 { 1810 .cmd = NFC_CMD_DEACTIVATE_TARGET, 1811 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1812 .doit = nfc_genl_deactivate_target, 1813 .flags = GENL_ADMIN_PERM, 1814 }, 1815 }; 1816 1817 static struct genl_family nfc_genl_family __ro_after_init = { 1818 .hdrsize = 0, 1819 .name = NFC_GENL_NAME, 1820 .version = NFC_GENL_VERSION, 1821 .maxattr = NFC_ATTR_MAX, 1822 .policy = nfc_genl_policy, 1823 .module = THIS_MODULE, 1824 .ops = nfc_genl_ops, 1825 .n_ops = ARRAY_SIZE(nfc_genl_ops), 1826 .resv_start_op = NFC_CMD_DEACTIVATE_TARGET + 1, 1827 .mcgrps = nfc_genl_mcgrps, 1828 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps), 1829 }; 1830 1831 1832 struct urelease_work { 1833 struct work_struct w; 1834 u32 portid; 1835 }; 1836 1837 static void nfc_urelease_event_work(struct work_struct *work) 1838 { 1839 struct urelease_work *w = container_of(work, struct urelease_work, w); 1840 struct class_dev_iter iter; 1841 struct nfc_dev *dev; 1842 1843 pr_debug("portid %d\n", w->portid); 1844 1845 mutex_lock(&nfc_devlist_mutex); 1846 1847 nfc_device_iter_init(&iter); 1848 dev = nfc_device_iter_next(&iter); 1849 1850 while (dev) { 1851 mutex_lock(&dev->genl_data.genl_data_mutex); 1852 1853 if (dev->genl_data.poll_req_portid == w->portid) { 1854 nfc_stop_poll(dev); 1855 dev->genl_data.poll_req_portid = 0; 1856 } 1857 1858 mutex_unlock(&dev->genl_data.genl_data_mutex); 1859 1860 dev = nfc_device_iter_next(&iter); 1861 } 1862 1863 nfc_device_iter_exit(&iter); 1864 1865 mutex_unlock(&nfc_devlist_mutex); 1866 1867 kfree(w); 1868 } 1869 1870 static int nfc_genl_rcv_nl_event(struct notifier_block *this, 1871 unsigned long event, void *ptr) 1872 { 1873 struct netlink_notify *n = ptr; 1874 struct urelease_work *w; 1875 1876 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC) 1877 goto out; 1878 1879 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid); 1880 1881 w = kmalloc_obj(*w, GFP_ATOMIC); 1882 if (w) { 1883 INIT_WORK(&w->w, nfc_urelease_event_work); 1884 w->portid = n->portid; 1885 schedule_work(&w->w); 1886 } 1887 1888 out: 1889 return NOTIFY_DONE; 1890 } 1891 1892 void nfc_genl_data_init(struct nfc_genl_data *genl_data) 1893 { 1894 genl_data->poll_req_portid = 0; 1895 mutex_init(&genl_data->genl_data_mutex); 1896 } 1897 1898 void nfc_genl_data_exit(struct nfc_genl_data *genl_data) 1899 { 1900 mutex_destroy(&genl_data->genl_data_mutex); 1901 } 1902 1903 static struct notifier_block nl_notifier = { 1904 .notifier_call = nfc_genl_rcv_nl_event, 1905 }; 1906 1907 /** 1908 * nfc_genl_init() - Initialize netlink interface 1909 * 1910 * This initialization function registers the nfc netlink family. 1911 */ 1912 int __init nfc_genl_init(void) 1913 { 1914 int rc; 1915 1916 rc = genl_register_family(&nfc_genl_family); 1917 if (rc) 1918 return rc; 1919 1920 netlink_register_notifier(&nl_notifier); 1921 1922 return 0; 1923 } 1924 1925 /** 1926 * nfc_genl_exit() - Deinitialize netlink interface 1927 * 1928 * This exit function unregisters the nfc netlink family. 1929 */ 1930 void nfc_genl_exit(void) 1931 { 1932 netlink_unregister_notifier(&nl_notifier); 1933 genl_unregister_family(&nfc_genl_family); 1934 } 1935