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