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 return -EINVAL; 916 917 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 918 919 dev = nfc_get_device(device_idx); 920 if (!dev) 921 return -ENODEV; 922 923 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); 924 925 rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP); 926 927 nfc_put_device(dev); 928 return rc; 929 } 930 931 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info) 932 { 933 struct nfc_dev *dev; 934 int rc, tgt_idx; 935 u32 idx; 936 u8 comm; 937 938 pr_debug("DEP link up\n"); 939 940 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 941 !info->attrs[NFC_ATTR_COMM_MODE]) 942 return -EINVAL; 943 944 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 945 if (!info->attrs[NFC_ATTR_TARGET_INDEX]) 946 tgt_idx = NFC_TARGET_IDX_ANY; 947 else 948 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); 949 950 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]); 951 952 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE) 953 return -EINVAL; 954 955 dev = nfc_get_device(idx); 956 if (!dev) 957 return -ENODEV; 958 959 rc = nfc_dep_link_up(dev, tgt_idx, comm); 960 961 nfc_put_device(dev); 962 963 return rc; 964 } 965 966 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) 967 { 968 struct nfc_dev *dev; 969 int rc; 970 u32 idx; 971 972 if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) 973 return -EINVAL; 974 975 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 976 977 dev = nfc_get_device(idx); 978 if (!dev) 979 return -ENODEV; 980 981 rc = nfc_dep_link_down(dev); 982 983 nfc_put_device(dev); 984 return rc; 985 } 986 987 static int nfc_genl_send_params(struct sk_buff *msg, 988 struct nfc_llcp_local *local, 989 u32 portid, u32 seq) 990 { 991 void *hdr; 992 993 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0, 994 NFC_CMD_LLC_GET_PARAMS); 995 if (!hdr) 996 return -EMSGSIZE; 997 998 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) || 999 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) || 1000 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) || 1001 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux))) 1002 goto nla_put_failure; 1003 1004 genlmsg_end(msg, hdr); 1005 return 0; 1006 1007 nla_put_failure: 1008 genlmsg_cancel(msg, hdr); 1009 return -EMSGSIZE; 1010 } 1011 1012 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info) 1013 { 1014 struct nfc_dev *dev; 1015 struct nfc_llcp_local *local; 1016 int rc = 0; 1017 struct sk_buff *msg = NULL; 1018 u32 idx; 1019 1020 if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) 1021 return -EINVAL; 1022 1023 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1024 1025 dev = nfc_get_device(idx); 1026 if (!dev) 1027 return -ENODEV; 1028 1029 device_lock(&dev->dev); 1030 1031 local = nfc_llcp_find_local(dev); 1032 if (!local) { 1033 rc = -ENODEV; 1034 goto exit; 1035 } 1036 1037 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1038 if (!msg) { 1039 rc = -ENOMEM; 1040 goto exit; 1041 } 1042 1043 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq); 1044 1045 exit: 1046 device_unlock(&dev->dev); 1047 1048 nfc_put_device(dev); 1049 1050 if (rc < 0) { 1051 if (msg) 1052 nlmsg_free(msg); 1053 1054 return rc; 1055 } 1056 1057 return genlmsg_reply(msg, info); 1058 } 1059 1060 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info) 1061 { 1062 struct nfc_dev *dev; 1063 struct nfc_llcp_local *local; 1064 u8 rw = 0; 1065 u16 miux = 0; 1066 u32 idx; 1067 int rc = 0; 1068 1069 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1070 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] && 1071 !info->attrs[NFC_ATTR_LLC_PARAM_RW] && 1072 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX])) 1073 return -EINVAL; 1074 1075 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) { 1076 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]); 1077 1078 if (rw > LLCP_MAX_RW) 1079 return -EINVAL; 1080 } 1081 1082 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) { 1083 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]); 1084 1085 if (miux > LLCP_MAX_MIUX) 1086 return -EINVAL; 1087 } 1088 1089 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1090 1091 dev = nfc_get_device(idx); 1092 if (!dev) 1093 return -ENODEV; 1094 1095 device_lock(&dev->dev); 1096 1097 local = nfc_llcp_find_local(dev); 1098 if (!local) { 1099 nfc_put_device(dev); 1100 rc = -ENODEV; 1101 goto exit; 1102 } 1103 1104 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) { 1105 if (dev->dep_link_up) { 1106 rc = -EINPROGRESS; 1107 goto exit; 1108 } 1109 1110 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]); 1111 } 1112 1113 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) 1114 local->rw = rw; 1115 1116 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) 1117 local->miux = cpu_to_be16(miux); 1118 1119 exit: 1120 device_unlock(&dev->dev); 1121 1122 nfc_put_device(dev); 1123 1124 return rc; 1125 } 1126 1127 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info) 1128 { 1129 struct nfc_dev *dev; 1130 struct nfc_llcp_local *local; 1131 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1]; 1132 u32 idx; 1133 u8 tid; 1134 char *uri; 1135 int rc = 0, rem; 1136 size_t uri_len, tlvs_len; 1137 struct hlist_head sdreq_list; 1138 struct nfc_llcp_sdp_tlv *sdreq; 1139 1140 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1141 !info->attrs[NFC_ATTR_LLC_SDP]) 1142 return -EINVAL; 1143 1144 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1145 1146 dev = nfc_get_device(idx); 1147 if (!dev) 1148 return -ENODEV; 1149 1150 device_lock(&dev->dev); 1151 1152 if (dev->dep_link_up == false) { 1153 rc = -ENOLINK; 1154 goto exit; 1155 } 1156 1157 local = nfc_llcp_find_local(dev); 1158 if (!local) { 1159 nfc_put_device(dev); 1160 rc = -ENODEV; 1161 goto exit; 1162 } 1163 1164 INIT_HLIST_HEAD(&sdreq_list); 1165 1166 tlvs_len = 0; 1167 1168 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) { 1169 rc = nla_parse_nested_deprecated(sdp_attrs, NFC_SDP_ATTR_MAX, 1170 attr, nfc_sdp_genl_policy, 1171 info->extack); 1172 1173 if (rc != 0) { 1174 rc = -EINVAL; 1175 goto exit; 1176 } 1177 1178 if (!sdp_attrs[NFC_SDP_ATTR_URI]) 1179 continue; 1180 1181 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]); 1182 if (uri_len == 0) 1183 continue; 1184 1185 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]); 1186 if (uri == NULL || *uri == 0) 1187 continue; 1188 1189 tid = local->sdreq_next_tid++; 1190 1191 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len); 1192 if (sdreq == NULL) { 1193 rc = -ENOMEM; 1194 goto exit; 1195 } 1196 1197 tlvs_len += sdreq->tlv_len; 1198 1199 hlist_add_head(&sdreq->node, &sdreq_list); 1200 } 1201 1202 if (hlist_empty(&sdreq_list)) { 1203 rc = -EINVAL; 1204 goto exit; 1205 } 1206 1207 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len); 1208 exit: 1209 device_unlock(&dev->dev); 1210 1211 nfc_put_device(dev); 1212 1213 return rc; 1214 } 1215 1216 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info) 1217 { 1218 struct nfc_dev *dev; 1219 int rc; 1220 u32 idx; 1221 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1]; 1222 1223 if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) 1224 return -EINVAL; 1225 1226 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1227 1228 dev = nfc_get_device(idx); 1229 if (!dev) 1230 return -ENODEV; 1231 1232 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME], 1233 sizeof(firmware_name)); 1234 1235 rc = nfc_fw_download(dev, firmware_name); 1236 1237 nfc_put_device(dev); 1238 return rc; 1239 } 1240 1241 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name, 1242 u32 result) 1243 { 1244 struct sk_buff *msg; 1245 void *hdr; 1246 1247 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1248 if (!msg) 1249 return -ENOMEM; 1250 1251 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 1252 NFC_CMD_FW_DOWNLOAD); 1253 if (!hdr) 1254 goto free_msg; 1255 1256 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) || 1257 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) || 1258 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) 1259 goto nla_put_failure; 1260 1261 genlmsg_end(msg, hdr); 1262 1263 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 1264 1265 return 0; 1266 1267 nla_put_failure: 1268 free_msg: 1269 nlmsg_free(msg); 1270 return -EMSGSIZE; 1271 } 1272 1273 static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info) 1274 { 1275 struct nfc_dev *dev; 1276 int rc; 1277 u32 idx, se_idx; 1278 1279 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1280 !info->attrs[NFC_ATTR_SE_INDEX]) 1281 return -EINVAL; 1282 1283 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1284 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); 1285 1286 dev = nfc_get_device(idx); 1287 if (!dev) 1288 return -ENODEV; 1289 1290 rc = nfc_enable_se(dev, se_idx); 1291 1292 nfc_put_device(dev); 1293 return rc; 1294 } 1295 1296 static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info) 1297 { 1298 struct nfc_dev *dev; 1299 int rc; 1300 u32 idx, se_idx; 1301 1302 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1303 !info->attrs[NFC_ATTR_SE_INDEX]) 1304 return -EINVAL; 1305 1306 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1307 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); 1308 1309 dev = nfc_get_device(idx); 1310 if (!dev) 1311 return -ENODEV; 1312 1313 rc = nfc_disable_se(dev, se_idx); 1314 1315 nfc_put_device(dev); 1316 return rc; 1317 } 1318 1319 static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev, 1320 u32 portid, u32 seq, 1321 struct netlink_callback *cb, 1322 int flags) 1323 { 1324 void *hdr; 1325 struct nfc_se *se, *n; 1326 1327 list_for_each_entry_safe(se, n, &dev->secure_elements, list) { 1328 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags, 1329 NFC_CMD_GET_SE); 1330 if (!hdr) 1331 goto nla_put_failure; 1332 1333 if (cb) 1334 genl_dump_check_consistent(cb, hdr); 1335 1336 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || 1337 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) || 1338 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type)) 1339 goto nla_put_failure; 1340 1341 genlmsg_end(msg, hdr); 1342 } 1343 1344 return 0; 1345 1346 nla_put_failure: 1347 genlmsg_cancel(msg, hdr); 1348 return -EMSGSIZE; 1349 } 1350 1351 static int nfc_genl_dump_ses(struct sk_buff *skb, 1352 struct netlink_callback *cb) 1353 { 1354 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; 1355 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; 1356 bool first_call = false; 1357 1358 if (!iter) { 1359 first_call = true; 1360 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL); 1361 if (!iter) 1362 return -ENOMEM; 1363 cb->args[0] = (long) iter; 1364 } 1365 1366 mutex_lock(&nfc_devlist_mutex); 1367 1368 cb->seq = nfc_devlist_generation; 1369 1370 if (first_call) { 1371 nfc_device_iter_init(iter); 1372 dev = nfc_device_iter_next(iter); 1373 } 1374 1375 while (dev) { 1376 int rc; 1377 1378 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid, 1379 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); 1380 if (rc < 0) 1381 break; 1382 1383 dev = nfc_device_iter_next(iter); 1384 } 1385 1386 mutex_unlock(&nfc_devlist_mutex); 1387 1388 cb->args[1] = (long) dev; 1389 1390 return skb->len; 1391 } 1392 1393 static int nfc_genl_dump_ses_done(struct netlink_callback *cb) 1394 { 1395 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; 1396 1397 nfc_device_iter_exit(iter); 1398 kfree(iter); 1399 1400 return 0; 1401 } 1402 1403 static int nfc_se_io(struct nfc_dev *dev, u32 se_idx, 1404 u8 *apdu, size_t apdu_length, 1405 se_io_cb_t cb, void *cb_context) 1406 { 1407 struct nfc_se *se; 1408 int rc; 1409 1410 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); 1411 1412 device_lock(&dev->dev); 1413 1414 if (!device_is_registered(&dev->dev)) { 1415 rc = -ENODEV; 1416 goto error; 1417 } 1418 1419 if (!dev->dev_up) { 1420 rc = -ENODEV; 1421 goto error; 1422 } 1423 1424 if (!dev->ops->se_io) { 1425 rc = -EOPNOTSUPP; 1426 goto error; 1427 } 1428 1429 se = nfc_find_se(dev, se_idx); 1430 if (!se) { 1431 rc = -EINVAL; 1432 goto error; 1433 } 1434 1435 if (se->state != NFC_SE_ENABLED) { 1436 rc = -ENODEV; 1437 goto error; 1438 } 1439 1440 rc = dev->ops->se_io(dev, se_idx, apdu, 1441 apdu_length, cb, cb_context); 1442 1443 error: 1444 device_unlock(&dev->dev); 1445 return rc; 1446 } 1447 1448 struct se_io_ctx { 1449 u32 dev_idx; 1450 u32 se_idx; 1451 }; 1452 1453 static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err) 1454 { 1455 struct se_io_ctx *ctx = context; 1456 struct sk_buff *msg; 1457 void *hdr; 1458 1459 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1460 if (!msg) { 1461 kfree(ctx); 1462 return; 1463 } 1464 1465 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 1466 NFC_CMD_SE_IO); 1467 if (!hdr) 1468 goto free_msg; 1469 1470 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) || 1471 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) || 1472 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu)) 1473 goto nla_put_failure; 1474 1475 genlmsg_end(msg, hdr); 1476 1477 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 1478 1479 kfree(ctx); 1480 1481 return; 1482 1483 nla_put_failure: 1484 free_msg: 1485 nlmsg_free(msg); 1486 kfree(ctx); 1487 1488 return; 1489 } 1490 1491 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info) 1492 { 1493 struct nfc_dev *dev; 1494 struct se_io_ctx *ctx; 1495 u32 dev_idx, se_idx; 1496 u8 *apdu; 1497 size_t apdu_len; 1498 1499 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1500 !info->attrs[NFC_ATTR_SE_INDEX] || 1501 !info->attrs[NFC_ATTR_SE_APDU]) 1502 return -EINVAL; 1503 1504 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1505 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); 1506 1507 dev = nfc_get_device(dev_idx); 1508 if (!dev) 1509 return -ENODEV; 1510 1511 if (!dev->ops || !dev->ops->se_io) 1512 return -ENOTSUPP; 1513 1514 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]); 1515 if (apdu_len == 0) 1516 return -EINVAL; 1517 1518 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]); 1519 if (!apdu) 1520 return -EINVAL; 1521 1522 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL); 1523 if (!ctx) 1524 return -ENOMEM; 1525 1526 ctx->dev_idx = dev_idx; 1527 ctx->se_idx = se_idx; 1528 1529 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx); 1530 } 1531 1532 static int nfc_genl_vendor_cmd(struct sk_buff *skb, 1533 struct genl_info *info) 1534 { 1535 struct nfc_dev *dev; 1536 struct nfc_vendor_cmd *cmd; 1537 u32 dev_idx, vid, subcmd; 1538 u8 *data; 1539 size_t data_len; 1540 int i, err; 1541 1542 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1543 !info->attrs[NFC_ATTR_VENDOR_ID] || 1544 !info->attrs[NFC_ATTR_VENDOR_SUBCMD]) 1545 return -EINVAL; 1546 1547 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1548 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]); 1549 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]); 1550 1551 dev = nfc_get_device(dev_idx); 1552 if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds) 1553 return -ENODEV; 1554 1555 if (info->attrs[NFC_ATTR_VENDOR_DATA]) { 1556 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]); 1557 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]); 1558 if (data_len == 0) 1559 return -EINVAL; 1560 } else { 1561 data = NULL; 1562 data_len = 0; 1563 } 1564 1565 for (i = 0; i < dev->n_vendor_cmds; i++) { 1566 cmd = &dev->vendor_cmds[i]; 1567 1568 if (cmd->vendor_id != vid || cmd->subcmd != subcmd) 1569 continue; 1570 1571 dev->cur_cmd_info = info; 1572 err = cmd->doit(dev, data, data_len); 1573 dev->cur_cmd_info = NULL; 1574 return err; 1575 } 1576 1577 return -EOPNOTSUPP; 1578 } 1579 1580 /* message building helper */ 1581 static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq, 1582 int flags, u8 cmd) 1583 { 1584 /* since there is no private header just add the generic one */ 1585 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd); 1586 } 1587 1588 static struct sk_buff * 1589 __nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen, 1590 u32 portid, u32 seq, 1591 enum nfc_attrs attr, 1592 u32 oui, u32 subcmd, gfp_t gfp) 1593 { 1594 struct sk_buff *skb; 1595 void *hdr; 1596 1597 skb = nlmsg_new(approxlen + 100, gfp); 1598 if (!skb) 1599 return NULL; 1600 1601 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR); 1602 if (!hdr) { 1603 kfree_skb(skb); 1604 return NULL; 1605 } 1606 1607 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx)) 1608 goto nla_put_failure; 1609 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui)) 1610 goto nla_put_failure; 1611 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd)) 1612 goto nla_put_failure; 1613 1614 ((void **)skb->cb)[0] = dev; 1615 ((void **)skb->cb)[1] = hdr; 1616 1617 return skb; 1618 1619 nla_put_failure: 1620 kfree_skb(skb); 1621 return NULL; 1622 } 1623 1624 struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev, 1625 enum nfc_attrs attr, 1626 u32 oui, u32 subcmd, 1627 int approxlen) 1628 { 1629 if (WARN_ON(!dev->cur_cmd_info)) 1630 return NULL; 1631 1632 return __nfc_alloc_vendor_cmd_skb(dev, approxlen, 1633 dev->cur_cmd_info->snd_portid, 1634 dev->cur_cmd_info->snd_seq, attr, 1635 oui, subcmd, GFP_KERNEL); 1636 } 1637 EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb); 1638 1639 int nfc_vendor_cmd_reply(struct sk_buff *skb) 1640 { 1641 struct nfc_dev *dev = ((void **)skb->cb)[0]; 1642 void *hdr = ((void **)skb->cb)[1]; 1643 1644 /* clear CB data for netlink core to own from now on */ 1645 memset(skb->cb, 0, sizeof(skb->cb)); 1646 1647 if (WARN_ON(!dev->cur_cmd_info)) { 1648 kfree_skb(skb); 1649 return -EINVAL; 1650 } 1651 1652 genlmsg_end(skb, hdr); 1653 return genlmsg_reply(skb, dev->cur_cmd_info); 1654 } 1655 EXPORT_SYMBOL(nfc_vendor_cmd_reply); 1656 1657 static const struct genl_ops nfc_genl_ops[] = { 1658 { 1659 .cmd = NFC_CMD_GET_DEVICE, 1660 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1661 .doit = nfc_genl_get_device, 1662 .dumpit = nfc_genl_dump_devices, 1663 .done = nfc_genl_dump_devices_done, 1664 }, 1665 { 1666 .cmd = NFC_CMD_DEV_UP, 1667 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1668 .doit = nfc_genl_dev_up, 1669 }, 1670 { 1671 .cmd = NFC_CMD_DEV_DOWN, 1672 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1673 .doit = nfc_genl_dev_down, 1674 }, 1675 { 1676 .cmd = NFC_CMD_START_POLL, 1677 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1678 .doit = nfc_genl_start_poll, 1679 }, 1680 { 1681 .cmd = NFC_CMD_STOP_POLL, 1682 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1683 .doit = nfc_genl_stop_poll, 1684 }, 1685 { 1686 .cmd = NFC_CMD_DEP_LINK_UP, 1687 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1688 .doit = nfc_genl_dep_link_up, 1689 }, 1690 { 1691 .cmd = NFC_CMD_DEP_LINK_DOWN, 1692 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1693 .doit = nfc_genl_dep_link_down, 1694 }, 1695 { 1696 .cmd = NFC_CMD_GET_TARGET, 1697 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1698 .dumpit = nfc_genl_dump_targets, 1699 .done = nfc_genl_dump_targets_done, 1700 }, 1701 { 1702 .cmd = NFC_CMD_LLC_GET_PARAMS, 1703 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1704 .doit = nfc_genl_llc_get_params, 1705 }, 1706 { 1707 .cmd = NFC_CMD_LLC_SET_PARAMS, 1708 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1709 .doit = nfc_genl_llc_set_params, 1710 }, 1711 { 1712 .cmd = NFC_CMD_LLC_SDREQ, 1713 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1714 .doit = nfc_genl_llc_sdreq, 1715 }, 1716 { 1717 .cmd = NFC_CMD_FW_DOWNLOAD, 1718 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1719 .doit = nfc_genl_fw_download, 1720 }, 1721 { 1722 .cmd = NFC_CMD_ENABLE_SE, 1723 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1724 .doit = nfc_genl_enable_se, 1725 }, 1726 { 1727 .cmd = NFC_CMD_DISABLE_SE, 1728 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1729 .doit = nfc_genl_disable_se, 1730 }, 1731 { 1732 .cmd = NFC_CMD_GET_SE, 1733 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1734 .dumpit = nfc_genl_dump_ses, 1735 .done = nfc_genl_dump_ses_done, 1736 }, 1737 { 1738 .cmd = NFC_CMD_SE_IO, 1739 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1740 .doit = nfc_genl_se_io, 1741 }, 1742 { 1743 .cmd = NFC_CMD_ACTIVATE_TARGET, 1744 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1745 .doit = nfc_genl_activate_target, 1746 }, 1747 { 1748 .cmd = NFC_CMD_VENDOR, 1749 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1750 .doit = nfc_genl_vendor_cmd, 1751 }, 1752 { 1753 .cmd = NFC_CMD_DEACTIVATE_TARGET, 1754 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1755 .doit = nfc_genl_deactivate_target, 1756 }, 1757 }; 1758 1759 static struct genl_family nfc_genl_family __ro_after_init = { 1760 .hdrsize = 0, 1761 .name = NFC_GENL_NAME, 1762 .version = NFC_GENL_VERSION, 1763 .maxattr = NFC_ATTR_MAX, 1764 .policy = nfc_genl_policy, 1765 .module = THIS_MODULE, 1766 .ops = nfc_genl_ops, 1767 .n_ops = ARRAY_SIZE(nfc_genl_ops), 1768 .mcgrps = nfc_genl_mcgrps, 1769 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps), 1770 }; 1771 1772 1773 struct urelease_work { 1774 struct work_struct w; 1775 u32 portid; 1776 }; 1777 1778 static void nfc_urelease_event_work(struct work_struct *work) 1779 { 1780 struct urelease_work *w = container_of(work, struct urelease_work, w); 1781 struct class_dev_iter iter; 1782 struct nfc_dev *dev; 1783 1784 pr_debug("portid %d\n", w->portid); 1785 1786 mutex_lock(&nfc_devlist_mutex); 1787 1788 nfc_device_iter_init(&iter); 1789 dev = nfc_device_iter_next(&iter); 1790 1791 while (dev) { 1792 mutex_lock(&dev->genl_data.genl_data_mutex); 1793 1794 if (dev->genl_data.poll_req_portid == w->portid) { 1795 nfc_stop_poll(dev); 1796 dev->genl_data.poll_req_portid = 0; 1797 } 1798 1799 mutex_unlock(&dev->genl_data.genl_data_mutex); 1800 1801 dev = nfc_device_iter_next(&iter); 1802 } 1803 1804 nfc_device_iter_exit(&iter); 1805 1806 mutex_unlock(&nfc_devlist_mutex); 1807 1808 kfree(w); 1809 } 1810 1811 static int nfc_genl_rcv_nl_event(struct notifier_block *this, 1812 unsigned long event, void *ptr) 1813 { 1814 struct netlink_notify *n = ptr; 1815 struct urelease_work *w; 1816 1817 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC) 1818 goto out; 1819 1820 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid); 1821 1822 w = kmalloc(sizeof(*w), GFP_ATOMIC); 1823 if (w) { 1824 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work); 1825 w->portid = n->portid; 1826 schedule_work((struct work_struct *) w); 1827 } 1828 1829 out: 1830 return NOTIFY_DONE; 1831 } 1832 1833 void nfc_genl_data_init(struct nfc_genl_data *genl_data) 1834 { 1835 genl_data->poll_req_portid = 0; 1836 mutex_init(&genl_data->genl_data_mutex); 1837 } 1838 1839 void nfc_genl_data_exit(struct nfc_genl_data *genl_data) 1840 { 1841 mutex_destroy(&genl_data->genl_data_mutex); 1842 } 1843 1844 static struct notifier_block nl_notifier = { 1845 .notifier_call = nfc_genl_rcv_nl_event, 1846 }; 1847 1848 /** 1849 * nfc_genl_init() - Initialize netlink interface 1850 * 1851 * This initialization function registers the nfc netlink family. 1852 */ 1853 int __init nfc_genl_init(void) 1854 { 1855 int rc; 1856 1857 rc = genl_register_family(&nfc_genl_family); 1858 if (rc) 1859 return rc; 1860 1861 netlink_register_notifier(&nl_notifier); 1862 1863 return 0; 1864 } 1865 1866 /** 1867 * nfc_genl_exit() - Deinitialize netlink interface 1868 * 1869 * This exit function unregisters the nfc netlink family. 1870 */ 1871 void nfc_genl_exit(void) 1872 { 1873 netlink_unregister_notifier(&nl_notifier); 1874 genl_unregister_family(&nfc_genl_family); 1875 } 1876