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