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