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