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 return -EINVAL; 856 } 857 858 device_unlock(&dev->dev); 859 860 mutex_lock(&dev->genl_data.genl_data_mutex); 861 862 if (dev->genl_data.poll_req_portid != info->snd_portid) { 863 rc = -EBUSY; 864 goto out; 865 } 866 867 rc = nfc_stop_poll(dev); 868 dev->genl_data.poll_req_portid = 0; 869 870 out: 871 mutex_unlock(&dev->genl_data.genl_data_mutex); 872 nfc_put_device(dev); 873 return rc; 874 } 875 876 static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info) 877 { 878 struct nfc_dev *dev; 879 u32 device_idx, target_idx, protocol; 880 int rc; 881 882 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 883 !info->attrs[NFC_ATTR_TARGET_INDEX] || 884 !info->attrs[NFC_ATTR_PROTOCOLS]) 885 return -EINVAL; 886 887 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 888 889 dev = nfc_get_device(device_idx); 890 if (!dev) 891 return -ENODEV; 892 893 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); 894 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); 895 896 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP); 897 rc = nfc_activate_target(dev, target_idx, protocol); 898 899 nfc_put_device(dev); 900 return rc; 901 } 902 903 static int nfc_genl_deactivate_target(struct sk_buff *skb, 904 struct genl_info *info) 905 { 906 struct nfc_dev *dev; 907 u32 device_idx, target_idx; 908 int rc; 909 910 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 911 !info->attrs[NFC_ATTR_TARGET_INDEX]) 912 return -EINVAL; 913 914 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 915 916 dev = nfc_get_device(device_idx); 917 if (!dev) 918 return -ENODEV; 919 920 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); 921 922 rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP); 923 924 nfc_put_device(dev); 925 return rc; 926 } 927 928 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info) 929 { 930 struct nfc_dev *dev; 931 int rc, tgt_idx; 932 u32 idx; 933 u8 comm; 934 935 pr_debug("DEP link up\n"); 936 937 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 938 !info->attrs[NFC_ATTR_COMM_MODE]) 939 return -EINVAL; 940 941 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 942 if (!info->attrs[NFC_ATTR_TARGET_INDEX]) 943 tgt_idx = NFC_TARGET_IDX_ANY; 944 else 945 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); 946 947 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]); 948 949 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE) 950 return -EINVAL; 951 952 dev = nfc_get_device(idx); 953 if (!dev) 954 return -ENODEV; 955 956 rc = nfc_dep_link_up(dev, tgt_idx, comm); 957 958 nfc_put_device(dev); 959 960 return rc; 961 } 962 963 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) 964 { 965 struct nfc_dev *dev; 966 int rc; 967 u32 idx; 968 969 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 970 !info->attrs[NFC_ATTR_TARGET_INDEX]) 971 return -EINVAL; 972 973 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 974 975 dev = nfc_get_device(idx); 976 if (!dev) 977 return -ENODEV; 978 979 rc = nfc_dep_link_down(dev); 980 981 nfc_put_device(dev); 982 return rc; 983 } 984 985 static int nfc_genl_send_params(struct sk_buff *msg, 986 struct nfc_llcp_local *local, 987 u32 portid, u32 seq) 988 { 989 void *hdr; 990 991 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0, 992 NFC_CMD_LLC_GET_PARAMS); 993 if (!hdr) 994 return -EMSGSIZE; 995 996 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) || 997 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) || 998 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) || 999 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux))) 1000 goto nla_put_failure; 1001 1002 genlmsg_end(msg, hdr); 1003 return 0; 1004 1005 nla_put_failure: 1006 genlmsg_cancel(msg, hdr); 1007 return -EMSGSIZE; 1008 } 1009 1010 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info) 1011 { 1012 struct nfc_dev *dev; 1013 struct nfc_llcp_local *local; 1014 int rc = 0; 1015 struct sk_buff *msg = NULL; 1016 u32 idx; 1017 1018 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1019 !info->attrs[NFC_ATTR_FIRMWARE_NAME]) 1020 return -EINVAL; 1021 1022 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1023 1024 dev = nfc_get_device(idx); 1025 if (!dev) 1026 return -ENODEV; 1027 1028 device_lock(&dev->dev); 1029 1030 local = nfc_llcp_find_local(dev); 1031 if (!local) { 1032 rc = -ENODEV; 1033 goto exit; 1034 } 1035 1036 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1037 if (!msg) { 1038 rc = -ENOMEM; 1039 goto exit; 1040 } 1041 1042 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq); 1043 1044 exit: 1045 device_unlock(&dev->dev); 1046 1047 nfc_put_device(dev); 1048 1049 if (rc < 0) { 1050 if (msg) 1051 nlmsg_free(msg); 1052 1053 return rc; 1054 } 1055 1056 return genlmsg_reply(msg, info); 1057 } 1058 1059 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info) 1060 { 1061 struct nfc_dev *dev; 1062 struct nfc_llcp_local *local; 1063 u8 rw = 0; 1064 u16 miux = 0; 1065 u32 idx; 1066 int rc = 0; 1067 1068 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1069 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] && 1070 !info->attrs[NFC_ATTR_LLC_PARAM_RW] && 1071 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX])) 1072 return -EINVAL; 1073 1074 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) { 1075 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]); 1076 1077 if (rw > LLCP_MAX_RW) 1078 return -EINVAL; 1079 } 1080 1081 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) { 1082 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]); 1083 1084 if (miux > LLCP_MAX_MIUX) 1085 return -EINVAL; 1086 } 1087 1088 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1089 1090 dev = nfc_get_device(idx); 1091 if (!dev) 1092 return -ENODEV; 1093 1094 device_lock(&dev->dev); 1095 1096 local = nfc_llcp_find_local(dev); 1097 if (!local) { 1098 rc = -ENODEV; 1099 goto exit; 1100 } 1101 1102 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) { 1103 if (dev->dep_link_up) { 1104 rc = -EINPROGRESS; 1105 goto exit; 1106 } 1107 1108 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]); 1109 } 1110 1111 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) 1112 local->rw = rw; 1113 1114 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) 1115 local->miux = cpu_to_be16(miux); 1116 1117 exit: 1118 device_unlock(&dev->dev); 1119 1120 nfc_put_device(dev); 1121 1122 return rc; 1123 } 1124 1125 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info) 1126 { 1127 struct nfc_dev *dev; 1128 struct nfc_llcp_local *local; 1129 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1]; 1130 u32 idx; 1131 u8 tid; 1132 char *uri; 1133 int rc = 0, rem; 1134 size_t uri_len, tlvs_len; 1135 struct hlist_head sdreq_list; 1136 struct nfc_llcp_sdp_tlv *sdreq; 1137 1138 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1139 !info->attrs[NFC_ATTR_LLC_SDP]) 1140 return -EINVAL; 1141 1142 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1143 1144 dev = nfc_get_device(idx); 1145 if (!dev) 1146 return -ENODEV; 1147 1148 device_lock(&dev->dev); 1149 1150 if (dev->dep_link_up == false) { 1151 rc = -ENOLINK; 1152 goto exit; 1153 } 1154 1155 local = nfc_llcp_find_local(dev); 1156 if (!local) { 1157 rc = -ENODEV; 1158 goto exit; 1159 } 1160 1161 INIT_HLIST_HEAD(&sdreq_list); 1162 1163 tlvs_len = 0; 1164 1165 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) { 1166 rc = nla_parse_nested_deprecated(sdp_attrs, NFC_SDP_ATTR_MAX, 1167 attr, nfc_sdp_genl_policy, 1168 info->extack); 1169 1170 if (rc != 0) { 1171 rc = -EINVAL; 1172 goto exit; 1173 } 1174 1175 if (!sdp_attrs[NFC_SDP_ATTR_URI]) 1176 continue; 1177 1178 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]); 1179 if (uri_len == 0) 1180 continue; 1181 1182 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]); 1183 if (uri == NULL || *uri == 0) 1184 continue; 1185 1186 tid = local->sdreq_next_tid++; 1187 1188 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len); 1189 if (sdreq == NULL) { 1190 rc = -ENOMEM; 1191 goto exit; 1192 } 1193 1194 tlvs_len += sdreq->tlv_len; 1195 1196 hlist_add_head(&sdreq->node, &sdreq_list); 1197 } 1198 1199 if (hlist_empty(&sdreq_list)) { 1200 rc = -EINVAL; 1201 goto exit; 1202 } 1203 1204 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len); 1205 exit: 1206 device_unlock(&dev->dev); 1207 1208 nfc_put_device(dev); 1209 1210 return rc; 1211 } 1212 1213 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info) 1214 { 1215 struct nfc_dev *dev; 1216 int rc; 1217 u32 idx; 1218 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1]; 1219 1220 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || !info->attrs[NFC_ATTR_FIRMWARE_NAME]) 1221 return -EINVAL; 1222 1223 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1224 1225 dev = nfc_get_device(idx); 1226 if (!dev) 1227 return -ENODEV; 1228 1229 nla_strscpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME], 1230 sizeof(firmware_name)); 1231 1232 rc = nfc_fw_download(dev, firmware_name); 1233 1234 nfc_put_device(dev); 1235 return rc; 1236 } 1237 1238 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name, 1239 u32 result) 1240 { 1241 struct sk_buff *msg; 1242 void *hdr; 1243 1244 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1245 if (!msg) 1246 return -ENOMEM; 1247 1248 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 1249 NFC_CMD_FW_DOWNLOAD); 1250 if (!hdr) 1251 goto free_msg; 1252 1253 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) || 1254 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) || 1255 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) 1256 goto nla_put_failure; 1257 1258 genlmsg_end(msg, hdr); 1259 1260 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 1261 1262 return 0; 1263 1264 nla_put_failure: 1265 free_msg: 1266 nlmsg_free(msg); 1267 return -EMSGSIZE; 1268 } 1269 1270 static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info) 1271 { 1272 struct nfc_dev *dev; 1273 int rc; 1274 u32 idx, se_idx; 1275 1276 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1277 !info->attrs[NFC_ATTR_SE_INDEX]) 1278 return -EINVAL; 1279 1280 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1281 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); 1282 1283 dev = nfc_get_device(idx); 1284 if (!dev) 1285 return -ENODEV; 1286 1287 rc = nfc_enable_se(dev, se_idx); 1288 1289 nfc_put_device(dev); 1290 return rc; 1291 } 1292 1293 static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info) 1294 { 1295 struct nfc_dev *dev; 1296 int rc; 1297 u32 idx, se_idx; 1298 1299 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1300 !info->attrs[NFC_ATTR_SE_INDEX]) 1301 return -EINVAL; 1302 1303 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1304 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); 1305 1306 dev = nfc_get_device(idx); 1307 if (!dev) 1308 return -ENODEV; 1309 1310 rc = nfc_disable_se(dev, se_idx); 1311 1312 nfc_put_device(dev); 1313 return rc; 1314 } 1315 1316 static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev, 1317 u32 portid, u32 seq, 1318 struct netlink_callback *cb, 1319 int flags) 1320 { 1321 void *hdr; 1322 struct nfc_se *se, *n; 1323 1324 list_for_each_entry_safe(se, n, &dev->secure_elements, list) { 1325 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags, 1326 NFC_CMD_GET_SE); 1327 if (!hdr) 1328 goto nla_put_failure; 1329 1330 if (cb) 1331 genl_dump_check_consistent(cb, hdr); 1332 1333 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || 1334 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) || 1335 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type)) 1336 goto nla_put_failure; 1337 1338 genlmsg_end(msg, hdr); 1339 } 1340 1341 return 0; 1342 1343 nla_put_failure: 1344 genlmsg_cancel(msg, hdr); 1345 return -EMSGSIZE; 1346 } 1347 1348 static int nfc_genl_dump_ses(struct sk_buff *skb, 1349 struct netlink_callback *cb) 1350 { 1351 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; 1352 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; 1353 bool first_call = false; 1354 1355 if (!iter) { 1356 first_call = true; 1357 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL); 1358 if (!iter) 1359 return -ENOMEM; 1360 cb->args[0] = (long) iter; 1361 } 1362 1363 mutex_lock(&nfc_devlist_mutex); 1364 1365 cb->seq = nfc_devlist_generation; 1366 1367 if (first_call) { 1368 nfc_device_iter_init(iter); 1369 dev = nfc_device_iter_next(iter); 1370 } 1371 1372 while (dev) { 1373 int rc; 1374 1375 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid, 1376 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); 1377 if (rc < 0) 1378 break; 1379 1380 dev = nfc_device_iter_next(iter); 1381 } 1382 1383 mutex_unlock(&nfc_devlist_mutex); 1384 1385 cb->args[1] = (long) dev; 1386 1387 return skb->len; 1388 } 1389 1390 static int nfc_genl_dump_ses_done(struct netlink_callback *cb) 1391 { 1392 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; 1393 1394 nfc_device_iter_exit(iter); 1395 kfree(iter); 1396 1397 return 0; 1398 } 1399 1400 static int nfc_se_io(struct nfc_dev *dev, u32 se_idx, 1401 u8 *apdu, size_t apdu_length, 1402 se_io_cb_t cb, void *cb_context) 1403 { 1404 struct nfc_se *se; 1405 int rc; 1406 1407 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); 1408 1409 device_lock(&dev->dev); 1410 1411 if (!device_is_registered(&dev->dev)) { 1412 rc = -ENODEV; 1413 goto error; 1414 } 1415 1416 if (!dev->dev_up) { 1417 rc = -ENODEV; 1418 goto error; 1419 } 1420 1421 if (!dev->ops->se_io) { 1422 rc = -EOPNOTSUPP; 1423 goto error; 1424 } 1425 1426 se = nfc_find_se(dev, se_idx); 1427 if (!se) { 1428 rc = -EINVAL; 1429 goto error; 1430 } 1431 1432 if (se->state != NFC_SE_ENABLED) { 1433 rc = -ENODEV; 1434 goto error; 1435 } 1436 1437 rc = dev->ops->se_io(dev, se_idx, apdu, 1438 apdu_length, cb, cb_context); 1439 1440 error: 1441 device_unlock(&dev->dev); 1442 return rc; 1443 } 1444 1445 struct se_io_ctx { 1446 u32 dev_idx; 1447 u32 se_idx; 1448 }; 1449 1450 static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err) 1451 { 1452 struct se_io_ctx *ctx = context; 1453 struct sk_buff *msg; 1454 void *hdr; 1455 1456 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1457 if (!msg) { 1458 kfree(ctx); 1459 return; 1460 } 1461 1462 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 1463 NFC_CMD_SE_IO); 1464 if (!hdr) 1465 goto free_msg; 1466 1467 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) || 1468 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) || 1469 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu)) 1470 goto nla_put_failure; 1471 1472 genlmsg_end(msg, hdr); 1473 1474 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 1475 1476 kfree(ctx); 1477 1478 return; 1479 1480 nla_put_failure: 1481 free_msg: 1482 nlmsg_free(msg); 1483 kfree(ctx); 1484 1485 return; 1486 } 1487 1488 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info) 1489 { 1490 struct nfc_dev *dev; 1491 struct se_io_ctx *ctx; 1492 u32 dev_idx, se_idx; 1493 u8 *apdu; 1494 size_t apdu_len; 1495 1496 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1497 !info->attrs[NFC_ATTR_SE_INDEX] || 1498 !info->attrs[NFC_ATTR_SE_APDU]) 1499 return -EINVAL; 1500 1501 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1502 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); 1503 1504 dev = nfc_get_device(dev_idx); 1505 if (!dev) 1506 return -ENODEV; 1507 1508 if (!dev->ops || !dev->ops->se_io) 1509 return -ENOTSUPP; 1510 1511 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]); 1512 if (apdu_len == 0) 1513 return -EINVAL; 1514 1515 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]); 1516 if (!apdu) 1517 return -EINVAL; 1518 1519 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL); 1520 if (!ctx) 1521 return -ENOMEM; 1522 1523 ctx->dev_idx = dev_idx; 1524 ctx->se_idx = se_idx; 1525 1526 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx); 1527 } 1528 1529 static int nfc_genl_vendor_cmd(struct sk_buff *skb, 1530 struct genl_info *info) 1531 { 1532 struct nfc_dev *dev; 1533 struct nfc_vendor_cmd *cmd; 1534 u32 dev_idx, vid, subcmd; 1535 u8 *data; 1536 size_t data_len; 1537 int i, err; 1538 1539 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1540 !info->attrs[NFC_ATTR_VENDOR_ID] || 1541 !info->attrs[NFC_ATTR_VENDOR_SUBCMD]) 1542 return -EINVAL; 1543 1544 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1545 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]); 1546 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]); 1547 1548 dev = nfc_get_device(dev_idx); 1549 if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds) 1550 return -ENODEV; 1551 1552 if (info->attrs[NFC_ATTR_VENDOR_DATA]) { 1553 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]); 1554 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]); 1555 if (data_len == 0) 1556 return -EINVAL; 1557 } else { 1558 data = NULL; 1559 data_len = 0; 1560 } 1561 1562 for (i = 0; i < dev->n_vendor_cmds; i++) { 1563 cmd = &dev->vendor_cmds[i]; 1564 1565 if (cmd->vendor_id != vid || cmd->subcmd != subcmd) 1566 continue; 1567 1568 dev->cur_cmd_info = info; 1569 err = cmd->doit(dev, data, data_len); 1570 dev->cur_cmd_info = NULL; 1571 return err; 1572 } 1573 1574 return -EOPNOTSUPP; 1575 } 1576 1577 /* message building helper */ 1578 static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq, 1579 int flags, u8 cmd) 1580 { 1581 /* since there is no private header just add the generic one */ 1582 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd); 1583 } 1584 1585 static struct sk_buff * 1586 __nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen, 1587 u32 portid, u32 seq, 1588 enum nfc_attrs attr, 1589 u32 oui, u32 subcmd, gfp_t gfp) 1590 { 1591 struct sk_buff *skb; 1592 void *hdr; 1593 1594 skb = nlmsg_new(approxlen + 100, gfp); 1595 if (!skb) 1596 return NULL; 1597 1598 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR); 1599 if (!hdr) { 1600 kfree_skb(skb); 1601 return NULL; 1602 } 1603 1604 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx)) 1605 goto nla_put_failure; 1606 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui)) 1607 goto nla_put_failure; 1608 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd)) 1609 goto nla_put_failure; 1610 1611 ((void **)skb->cb)[0] = dev; 1612 ((void **)skb->cb)[1] = hdr; 1613 1614 return skb; 1615 1616 nla_put_failure: 1617 kfree_skb(skb); 1618 return NULL; 1619 } 1620 1621 struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev, 1622 enum nfc_attrs attr, 1623 u32 oui, u32 subcmd, 1624 int approxlen) 1625 { 1626 if (WARN_ON(!dev->cur_cmd_info)) 1627 return NULL; 1628 1629 return __nfc_alloc_vendor_cmd_skb(dev, approxlen, 1630 dev->cur_cmd_info->snd_portid, 1631 dev->cur_cmd_info->snd_seq, attr, 1632 oui, subcmd, GFP_KERNEL); 1633 } 1634 EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb); 1635 1636 int nfc_vendor_cmd_reply(struct sk_buff *skb) 1637 { 1638 struct nfc_dev *dev = ((void **)skb->cb)[0]; 1639 void *hdr = ((void **)skb->cb)[1]; 1640 1641 /* clear CB data for netlink core to own from now on */ 1642 memset(skb->cb, 0, sizeof(skb->cb)); 1643 1644 if (WARN_ON(!dev->cur_cmd_info)) { 1645 kfree_skb(skb); 1646 return -EINVAL; 1647 } 1648 1649 genlmsg_end(skb, hdr); 1650 return genlmsg_reply(skb, dev->cur_cmd_info); 1651 } 1652 EXPORT_SYMBOL(nfc_vendor_cmd_reply); 1653 1654 static const struct genl_ops nfc_genl_ops[] = { 1655 { 1656 .cmd = NFC_CMD_GET_DEVICE, 1657 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1658 .doit = nfc_genl_get_device, 1659 .dumpit = nfc_genl_dump_devices, 1660 .done = nfc_genl_dump_devices_done, 1661 }, 1662 { 1663 .cmd = NFC_CMD_DEV_UP, 1664 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1665 .doit = nfc_genl_dev_up, 1666 }, 1667 { 1668 .cmd = NFC_CMD_DEV_DOWN, 1669 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1670 .doit = nfc_genl_dev_down, 1671 }, 1672 { 1673 .cmd = NFC_CMD_START_POLL, 1674 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1675 .doit = nfc_genl_start_poll, 1676 }, 1677 { 1678 .cmd = NFC_CMD_STOP_POLL, 1679 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1680 .doit = nfc_genl_stop_poll, 1681 }, 1682 { 1683 .cmd = NFC_CMD_DEP_LINK_UP, 1684 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1685 .doit = nfc_genl_dep_link_up, 1686 }, 1687 { 1688 .cmd = NFC_CMD_DEP_LINK_DOWN, 1689 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1690 .doit = nfc_genl_dep_link_down, 1691 }, 1692 { 1693 .cmd = NFC_CMD_GET_TARGET, 1694 .validate = GENL_DONT_VALIDATE_STRICT | 1695 GENL_DONT_VALIDATE_DUMP_STRICT, 1696 .dumpit = nfc_genl_dump_targets, 1697 .done = nfc_genl_dump_targets_done, 1698 }, 1699 { 1700 .cmd = NFC_CMD_LLC_GET_PARAMS, 1701 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1702 .doit = nfc_genl_llc_get_params, 1703 }, 1704 { 1705 .cmd = NFC_CMD_LLC_SET_PARAMS, 1706 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1707 .doit = nfc_genl_llc_set_params, 1708 }, 1709 { 1710 .cmd = NFC_CMD_LLC_SDREQ, 1711 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1712 .doit = nfc_genl_llc_sdreq, 1713 }, 1714 { 1715 .cmd = NFC_CMD_FW_DOWNLOAD, 1716 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1717 .doit = nfc_genl_fw_download, 1718 }, 1719 { 1720 .cmd = NFC_CMD_ENABLE_SE, 1721 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1722 .doit = nfc_genl_enable_se, 1723 }, 1724 { 1725 .cmd = NFC_CMD_DISABLE_SE, 1726 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1727 .doit = nfc_genl_disable_se, 1728 }, 1729 { 1730 .cmd = NFC_CMD_GET_SE, 1731 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1732 .dumpit = nfc_genl_dump_ses, 1733 .done = nfc_genl_dump_ses_done, 1734 }, 1735 { 1736 .cmd = NFC_CMD_SE_IO, 1737 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1738 .doit = nfc_genl_se_io, 1739 }, 1740 { 1741 .cmd = NFC_CMD_ACTIVATE_TARGET, 1742 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1743 .doit = nfc_genl_activate_target, 1744 }, 1745 { 1746 .cmd = NFC_CMD_VENDOR, 1747 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1748 .doit = nfc_genl_vendor_cmd, 1749 }, 1750 { 1751 .cmd = NFC_CMD_DEACTIVATE_TARGET, 1752 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1753 .doit = nfc_genl_deactivate_target, 1754 }, 1755 }; 1756 1757 static struct genl_family nfc_genl_family __ro_after_init = { 1758 .hdrsize = 0, 1759 .name = NFC_GENL_NAME, 1760 .version = NFC_GENL_VERSION, 1761 .maxattr = NFC_ATTR_MAX, 1762 .policy = nfc_genl_policy, 1763 .module = THIS_MODULE, 1764 .ops = nfc_genl_ops, 1765 .n_ops = ARRAY_SIZE(nfc_genl_ops), 1766 .mcgrps = nfc_genl_mcgrps, 1767 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps), 1768 }; 1769 1770 1771 struct urelease_work { 1772 struct work_struct w; 1773 u32 portid; 1774 }; 1775 1776 static void nfc_urelease_event_work(struct work_struct *work) 1777 { 1778 struct urelease_work *w = container_of(work, struct urelease_work, w); 1779 struct class_dev_iter iter; 1780 struct nfc_dev *dev; 1781 1782 pr_debug("portid %d\n", w->portid); 1783 1784 mutex_lock(&nfc_devlist_mutex); 1785 1786 nfc_device_iter_init(&iter); 1787 dev = nfc_device_iter_next(&iter); 1788 1789 while (dev) { 1790 mutex_lock(&dev->genl_data.genl_data_mutex); 1791 1792 if (dev->genl_data.poll_req_portid == w->portid) { 1793 nfc_stop_poll(dev); 1794 dev->genl_data.poll_req_portid = 0; 1795 } 1796 1797 mutex_unlock(&dev->genl_data.genl_data_mutex); 1798 1799 dev = nfc_device_iter_next(&iter); 1800 } 1801 1802 nfc_device_iter_exit(&iter); 1803 1804 mutex_unlock(&nfc_devlist_mutex); 1805 1806 kfree(w); 1807 } 1808 1809 static int nfc_genl_rcv_nl_event(struct notifier_block *this, 1810 unsigned long event, void *ptr) 1811 { 1812 struct netlink_notify *n = ptr; 1813 struct urelease_work *w; 1814 1815 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC) 1816 goto out; 1817 1818 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid); 1819 1820 w = kmalloc(sizeof(*w), GFP_ATOMIC); 1821 if (w) { 1822 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work); 1823 w->portid = n->portid; 1824 schedule_work((struct work_struct *) w); 1825 } 1826 1827 out: 1828 return NOTIFY_DONE; 1829 } 1830 1831 void nfc_genl_data_init(struct nfc_genl_data *genl_data) 1832 { 1833 genl_data->poll_req_portid = 0; 1834 mutex_init(&genl_data->genl_data_mutex); 1835 } 1836 1837 void nfc_genl_data_exit(struct nfc_genl_data *genl_data) 1838 { 1839 mutex_destroy(&genl_data->genl_data_mutex); 1840 } 1841 1842 static struct notifier_block nl_notifier = { 1843 .notifier_call = nfc_genl_rcv_nl_event, 1844 }; 1845 1846 /** 1847 * nfc_genl_init() - Initialize netlink interface 1848 * 1849 * This initialization function registers the nfc netlink family. 1850 */ 1851 int __init nfc_genl_init(void) 1852 { 1853 int rc; 1854 1855 rc = genl_register_family(&nfc_genl_family); 1856 if (rc) 1857 return rc; 1858 1859 netlink_register_notifier(&nl_notifier); 1860 1861 return 0; 1862 } 1863 1864 /** 1865 * nfc_genl_exit() - Deinitialize netlink interface 1866 * 1867 * This exit function unregisters the nfc netlink family. 1868 */ 1869 void nfc_genl_exit(void) 1870 { 1871 netlink_unregister_notifier(&nl_notifier); 1872 genl_unregister_family(&nfc_genl_family); 1873 } 1874