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 nfc_genl_send_target(struct sk_buff * msg,struct nfc_target * target,struct netlink_callback * cb,int flags)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 __get_device_from_cb(struct netlink_callback * cb)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 nfc_genl_dump_targets(struct sk_buff * skb,struct netlink_callback * cb)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 nfc_genl_dump_targets_done(struct netlink_callback * cb)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 nfc_genl_targets_found(struct nfc_dev * dev)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 nfc_genl_target_lost(struct nfc_dev * dev,u32 target_idx)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 nfc_genl_tm_activated(struct nfc_dev * dev,u32 protocol)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 nfc_genl_tm_deactivated(struct nfc_dev * dev)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 nfc_genl_setup_device_added(struct nfc_dev * dev,struct sk_buff * msg)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 nfc_genl_device_added(struct nfc_dev * dev)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 nfc_genl_device_removed(struct nfc_dev * dev)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 nfc_genl_llc_send_sdres(struct nfc_dev * dev,struct hlist_head * sdres_list)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 nfc_genl_se_added(struct nfc_dev * dev,u32 se_idx,u16 type)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 nfc_genl_se_removed(struct nfc_dev * dev,u32 se_idx)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 nfc_genl_se_transaction(struct nfc_dev * dev,u8 se_idx,struct nfc_evt_transaction * evt_transaction)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 nfc_genl_se_connectivity(struct nfc_dev * dev,u8 se_idx)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 nfc_genl_send_device(struct sk_buff * msg,struct nfc_dev * dev,u32 portid,u32 seq,struct netlink_callback * cb,int flags)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 nfc_genl_dump_devices(struct sk_buff * skb,struct netlink_callback * cb)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 nfc_genl_dump_devices_done(struct netlink_callback * cb)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 nfc_genl_dep_link_up_event(struct nfc_dev * dev,u32 target_idx,u8 comm_mode,u8 rf_mode)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 nfc_genl_dep_link_down_event(struct nfc_dev * dev)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 nfc_genl_get_device(struct sk_buff * skb,struct genl_info * info)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 nfc_genl_dev_up(struct sk_buff * skb,struct genl_info * info)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 nfc_genl_dev_down(struct sk_buff * skb,struct genl_info * info)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 nfc_genl_start_poll(struct sk_buff * skb,struct genl_info * info)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 nfc_genl_stop_poll(struct sk_buff * skb,struct genl_info * info)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 nfc_genl_activate_target(struct sk_buff * skb,struct genl_info * info)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 nfc_genl_deactivate_target(struct sk_buff * skb,struct genl_info * info)907 static int nfc_genl_deactivate_target(struct sk_buff *skb, 908 struct genl_info *info) 909 { 910 struct nfc_dev *dev; 911 u32 device_idx, target_idx; 912 int rc; 913 914 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 915 !info->attrs[NFC_ATTR_TARGET_INDEX]) 916 return -EINVAL; 917 918 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 919 920 dev = nfc_get_device(device_idx); 921 if (!dev) 922 return -ENODEV; 923 924 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); 925 926 rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP); 927 928 nfc_put_device(dev); 929 return rc; 930 } 931 nfc_genl_dep_link_up(struct sk_buff * skb,struct genl_info * info)932 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info) 933 { 934 struct nfc_dev *dev; 935 int rc, tgt_idx; 936 u32 idx; 937 u8 comm; 938 939 pr_debug("DEP link up\n"); 940 941 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 942 !info->attrs[NFC_ATTR_COMM_MODE]) 943 return -EINVAL; 944 945 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 946 if (!info->attrs[NFC_ATTR_TARGET_INDEX]) 947 tgt_idx = NFC_TARGET_IDX_ANY; 948 else 949 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); 950 951 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]); 952 953 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE) 954 return -EINVAL; 955 956 dev = nfc_get_device(idx); 957 if (!dev) 958 return -ENODEV; 959 960 rc = nfc_dep_link_up(dev, tgt_idx, comm); 961 962 nfc_put_device(dev); 963 964 return rc; 965 } 966 nfc_genl_dep_link_down(struct sk_buff * skb,struct genl_info * info)967 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) 968 { 969 struct nfc_dev *dev; 970 int rc; 971 u32 idx; 972 973 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 974 !info->attrs[NFC_ATTR_TARGET_INDEX]) 975 return -EINVAL; 976 977 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 978 979 dev = nfc_get_device(idx); 980 if (!dev) 981 return -ENODEV; 982 983 rc = nfc_dep_link_down(dev); 984 985 nfc_put_device(dev); 986 return rc; 987 } 988 nfc_genl_send_params(struct sk_buff * msg,struct nfc_llcp_local * local,u32 portid,u32 seq)989 static int nfc_genl_send_params(struct sk_buff *msg, 990 struct nfc_llcp_local *local, 991 u32 portid, u32 seq) 992 { 993 void *hdr; 994 995 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0, 996 NFC_CMD_LLC_GET_PARAMS); 997 if (!hdr) 998 return -EMSGSIZE; 999 1000 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) || 1001 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) || 1002 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) || 1003 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux))) 1004 goto nla_put_failure; 1005 1006 genlmsg_end(msg, hdr); 1007 return 0; 1008 1009 nla_put_failure: 1010 genlmsg_cancel(msg, hdr); 1011 return -EMSGSIZE; 1012 } 1013 nfc_genl_llc_get_params(struct sk_buff * skb,struct genl_info * info)1014 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info) 1015 { 1016 struct nfc_dev *dev; 1017 struct nfc_llcp_local *local; 1018 int rc = 0; 1019 struct sk_buff *msg = NULL; 1020 u32 idx; 1021 1022 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1023 !info->attrs[NFC_ATTR_FIRMWARE_NAME]) 1024 return -EINVAL; 1025 1026 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1027 1028 dev = nfc_get_device(idx); 1029 if (!dev) 1030 return -ENODEV; 1031 1032 device_lock(&dev->dev); 1033 1034 local = nfc_llcp_find_local(dev); 1035 if (!local) { 1036 rc = -ENODEV; 1037 goto exit; 1038 } 1039 1040 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1041 if (!msg) { 1042 rc = -ENOMEM; 1043 goto exit; 1044 } 1045 1046 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq); 1047 1048 exit: 1049 device_unlock(&dev->dev); 1050 1051 nfc_put_device(dev); 1052 1053 if (rc < 0) { 1054 if (msg) 1055 nlmsg_free(msg); 1056 1057 return rc; 1058 } 1059 1060 return genlmsg_reply(msg, info); 1061 } 1062 nfc_genl_llc_set_params(struct sk_buff * skb,struct genl_info * info)1063 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info) 1064 { 1065 struct nfc_dev *dev; 1066 struct nfc_llcp_local *local; 1067 u8 rw = 0; 1068 u16 miux = 0; 1069 u32 idx; 1070 int rc = 0; 1071 1072 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1073 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] && 1074 !info->attrs[NFC_ATTR_LLC_PARAM_RW] && 1075 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX])) 1076 return -EINVAL; 1077 1078 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) { 1079 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]); 1080 1081 if (rw > LLCP_MAX_RW) 1082 return -EINVAL; 1083 } 1084 1085 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) { 1086 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]); 1087 1088 if (miux > LLCP_MAX_MIUX) 1089 return -EINVAL; 1090 } 1091 1092 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1093 1094 dev = nfc_get_device(idx); 1095 if (!dev) 1096 return -ENODEV; 1097 1098 device_lock(&dev->dev); 1099 1100 local = nfc_llcp_find_local(dev); 1101 if (!local) { 1102 rc = -ENODEV; 1103 goto exit; 1104 } 1105 1106 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) { 1107 if (dev->dep_link_up) { 1108 rc = -EINPROGRESS; 1109 goto exit; 1110 } 1111 1112 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]); 1113 } 1114 1115 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) 1116 local->rw = rw; 1117 1118 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) 1119 local->miux = cpu_to_be16(miux); 1120 1121 exit: 1122 device_unlock(&dev->dev); 1123 1124 nfc_put_device(dev); 1125 1126 return rc; 1127 } 1128 nfc_genl_llc_sdreq(struct sk_buff * skb,struct genl_info * info)1129 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info) 1130 { 1131 struct nfc_dev *dev; 1132 struct nfc_llcp_local *local; 1133 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1]; 1134 u32 idx; 1135 u8 tid; 1136 char *uri; 1137 int rc = 0, rem; 1138 size_t uri_len, tlvs_len; 1139 struct hlist_head sdreq_list; 1140 struct nfc_llcp_sdp_tlv *sdreq; 1141 1142 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1143 !info->attrs[NFC_ATTR_LLC_SDP]) 1144 return -EINVAL; 1145 1146 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1147 1148 dev = nfc_get_device(idx); 1149 if (!dev) 1150 return -ENODEV; 1151 1152 device_lock(&dev->dev); 1153 1154 if (dev->dep_link_up == false) { 1155 rc = -ENOLINK; 1156 goto exit; 1157 } 1158 1159 local = nfc_llcp_find_local(dev); 1160 if (!local) { 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_deprecated(sdp_attrs, NFC_SDP_ATTR_MAX, 1171 attr, nfc_sdp_genl_policy, 1172 info->extack); 1173 1174 if (rc != 0) { 1175 rc = -EINVAL; 1176 goto exit; 1177 } 1178 1179 if (!sdp_attrs[NFC_SDP_ATTR_URI]) 1180 continue; 1181 1182 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]); 1183 if (uri_len == 0) 1184 continue; 1185 1186 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]); 1187 if (uri == NULL || *uri == 0) 1188 continue; 1189 1190 tid = local->sdreq_next_tid++; 1191 1192 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len); 1193 if (sdreq == NULL) { 1194 rc = -ENOMEM; 1195 goto exit; 1196 } 1197 1198 tlvs_len += sdreq->tlv_len; 1199 1200 hlist_add_head(&sdreq->node, &sdreq_list); 1201 } 1202 1203 if (hlist_empty(&sdreq_list)) { 1204 rc = -EINVAL; 1205 goto exit; 1206 } 1207 1208 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len); 1209 exit: 1210 device_unlock(&dev->dev); 1211 1212 nfc_put_device(dev); 1213 1214 return rc; 1215 } 1216 nfc_genl_fw_download(struct sk_buff * skb,struct genl_info * info)1217 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info) 1218 { 1219 struct nfc_dev *dev; 1220 int rc; 1221 u32 idx; 1222 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1]; 1223 1224 if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) 1225 return -EINVAL; 1226 1227 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1228 1229 dev = nfc_get_device(idx); 1230 if (!dev) 1231 return -ENODEV; 1232 1233 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME], 1234 sizeof(firmware_name)); 1235 1236 rc = nfc_fw_download(dev, firmware_name); 1237 1238 nfc_put_device(dev); 1239 return rc; 1240 } 1241 nfc_genl_fw_download_done(struct nfc_dev * dev,const char * firmware_name,u32 result)1242 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name, 1243 u32 result) 1244 { 1245 struct sk_buff *msg; 1246 void *hdr; 1247 1248 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1249 if (!msg) 1250 return -ENOMEM; 1251 1252 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, 1253 NFC_CMD_FW_DOWNLOAD); 1254 if (!hdr) 1255 goto free_msg; 1256 1257 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) || 1258 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) || 1259 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) 1260 goto nla_put_failure; 1261 1262 genlmsg_end(msg, hdr); 1263 1264 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); 1265 1266 return 0; 1267 1268 nla_put_failure: 1269 free_msg: 1270 nlmsg_free(msg); 1271 return -EMSGSIZE; 1272 } 1273 nfc_genl_enable_se(struct sk_buff * skb,struct genl_info * info)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 nfc_genl_disable_se(struct sk_buff * skb,struct genl_info * info)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 nfc_genl_send_se(struct sk_buff * msg,struct nfc_dev * dev,u32 portid,u32 seq,struct netlink_callback * cb,int flags)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); 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 nfc_genl_dump_ses(struct sk_buff * skb,struct netlink_callback * cb)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 nfc_genl_dump_ses_done(struct netlink_callback * cb)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 nfc_se_io(struct nfc_dev * dev,u32 se_idx,u8 * apdu,size_t apdu_length,se_io_cb_t cb,void * cb_context)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 se_io_cb(void * context,u8 * apdu,size_t apdu_len,int err)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 free_msg: 1486 nlmsg_free(msg); 1487 kfree(ctx); 1488 1489 return; 1490 } 1491 nfc_genl_se_io(struct sk_buff * skb,struct genl_info * info)1492 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info) 1493 { 1494 struct nfc_dev *dev; 1495 struct se_io_ctx *ctx; 1496 u32 dev_idx, se_idx; 1497 u8 *apdu; 1498 size_t apdu_len; 1499 1500 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1501 !info->attrs[NFC_ATTR_SE_INDEX] || 1502 !info->attrs[NFC_ATTR_SE_APDU]) 1503 return -EINVAL; 1504 1505 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1506 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); 1507 1508 dev = nfc_get_device(dev_idx); 1509 if (!dev) 1510 return -ENODEV; 1511 1512 if (!dev->ops || !dev->ops->se_io) 1513 return -ENOTSUPP; 1514 1515 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]); 1516 if (apdu_len == 0) 1517 return -EINVAL; 1518 1519 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]); 1520 if (!apdu) 1521 return -EINVAL; 1522 1523 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL); 1524 if (!ctx) 1525 return -ENOMEM; 1526 1527 ctx->dev_idx = dev_idx; 1528 ctx->se_idx = se_idx; 1529 1530 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx); 1531 } 1532 nfc_genl_vendor_cmd(struct sk_buff * skb,struct genl_info * info)1533 static int nfc_genl_vendor_cmd(struct sk_buff *skb, 1534 struct genl_info *info) 1535 { 1536 struct nfc_dev *dev; 1537 struct nfc_vendor_cmd *cmd; 1538 u32 dev_idx, vid, subcmd; 1539 u8 *data; 1540 size_t data_len; 1541 int i, err; 1542 1543 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || 1544 !info->attrs[NFC_ATTR_VENDOR_ID] || 1545 !info->attrs[NFC_ATTR_VENDOR_SUBCMD]) 1546 return -EINVAL; 1547 1548 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); 1549 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]); 1550 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]); 1551 1552 dev = nfc_get_device(dev_idx); 1553 if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds) 1554 return -ENODEV; 1555 1556 if (info->attrs[NFC_ATTR_VENDOR_DATA]) { 1557 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]); 1558 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]); 1559 if (data_len == 0) 1560 return -EINVAL; 1561 } else { 1562 data = NULL; 1563 data_len = 0; 1564 } 1565 1566 for (i = 0; i < dev->n_vendor_cmds; i++) { 1567 cmd = &dev->vendor_cmds[i]; 1568 1569 if (cmd->vendor_id != vid || cmd->subcmd != subcmd) 1570 continue; 1571 1572 dev->cur_cmd_info = info; 1573 err = cmd->doit(dev, data, data_len); 1574 dev->cur_cmd_info = NULL; 1575 return err; 1576 } 1577 1578 return -EOPNOTSUPP; 1579 } 1580 1581 /* message building helper */ nfc_hdr_put(struct sk_buff * skb,u32 portid,u32 seq,int flags,u8 cmd)1582 static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq, 1583 int flags, u8 cmd) 1584 { 1585 /* since there is no private header just add the generic one */ 1586 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd); 1587 } 1588 1589 static struct sk_buff * __nfc_alloc_vendor_cmd_skb(struct nfc_dev * dev,int approxlen,u32 portid,u32 seq,enum nfc_attrs attr,u32 oui,u32 subcmd,gfp_t gfp)1590 __nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen, 1591 u32 portid, u32 seq, 1592 enum nfc_attrs attr, 1593 u32 oui, u32 subcmd, gfp_t gfp) 1594 { 1595 struct sk_buff *skb; 1596 void *hdr; 1597 1598 skb = nlmsg_new(approxlen + 100, gfp); 1599 if (!skb) 1600 return NULL; 1601 1602 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR); 1603 if (!hdr) { 1604 kfree_skb(skb); 1605 return NULL; 1606 } 1607 1608 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx)) 1609 goto nla_put_failure; 1610 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui)) 1611 goto nla_put_failure; 1612 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd)) 1613 goto nla_put_failure; 1614 1615 ((void **)skb->cb)[0] = dev; 1616 ((void **)skb->cb)[1] = hdr; 1617 1618 return skb; 1619 1620 nla_put_failure: 1621 kfree_skb(skb); 1622 return NULL; 1623 } 1624 __nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev * dev,enum nfc_attrs attr,u32 oui,u32 subcmd,int approxlen)1625 struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev, 1626 enum nfc_attrs attr, 1627 u32 oui, u32 subcmd, 1628 int approxlen) 1629 { 1630 if (WARN_ON(!dev->cur_cmd_info)) 1631 return NULL; 1632 1633 return __nfc_alloc_vendor_cmd_skb(dev, approxlen, 1634 dev->cur_cmd_info->snd_portid, 1635 dev->cur_cmd_info->snd_seq, attr, 1636 oui, subcmd, GFP_KERNEL); 1637 } 1638 EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb); 1639 nfc_vendor_cmd_reply(struct sk_buff * skb)1640 int nfc_vendor_cmd_reply(struct sk_buff *skb) 1641 { 1642 struct nfc_dev *dev = ((void **)skb->cb)[0]; 1643 void *hdr = ((void **)skb->cb)[1]; 1644 1645 /* clear CB data for netlink core to own from now on */ 1646 memset(skb->cb, 0, sizeof(skb->cb)); 1647 1648 if (WARN_ON(!dev->cur_cmd_info)) { 1649 kfree_skb(skb); 1650 return -EINVAL; 1651 } 1652 1653 genlmsg_end(skb, hdr); 1654 return genlmsg_reply(skb, dev->cur_cmd_info); 1655 } 1656 EXPORT_SYMBOL(nfc_vendor_cmd_reply); 1657 1658 static const struct genl_ops nfc_genl_ops[] = { 1659 { 1660 .cmd = NFC_CMD_GET_DEVICE, 1661 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1662 .doit = nfc_genl_get_device, 1663 .dumpit = nfc_genl_dump_devices, 1664 .done = nfc_genl_dump_devices_done, 1665 }, 1666 { 1667 .cmd = NFC_CMD_DEV_UP, 1668 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1669 .doit = nfc_genl_dev_up, 1670 }, 1671 { 1672 .cmd = NFC_CMD_DEV_DOWN, 1673 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1674 .doit = nfc_genl_dev_down, 1675 }, 1676 { 1677 .cmd = NFC_CMD_START_POLL, 1678 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1679 .doit = nfc_genl_start_poll, 1680 }, 1681 { 1682 .cmd = NFC_CMD_STOP_POLL, 1683 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1684 .doit = nfc_genl_stop_poll, 1685 }, 1686 { 1687 .cmd = NFC_CMD_DEP_LINK_UP, 1688 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1689 .doit = nfc_genl_dep_link_up, 1690 }, 1691 { 1692 .cmd = NFC_CMD_DEP_LINK_DOWN, 1693 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1694 .doit = nfc_genl_dep_link_down, 1695 }, 1696 { 1697 .cmd = NFC_CMD_GET_TARGET, 1698 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1699 .dumpit = nfc_genl_dump_targets, 1700 .done = nfc_genl_dump_targets_done, 1701 }, 1702 { 1703 .cmd = NFC_CMD_LLC_GET_PARAMS, 1704 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1705 .doit = nfc_genl_llc_get_params, 1706 }, 1707 { 1708 .cmd = NFC_CMD_LLC_SET_PARAMS, 1709 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1710 .doit = nfc_genl_llc_set_params, 1711 }, 1712 { 1713 .cmd = NFC_CMD_LLC_SDREQ, 1714 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1715 .doit = nfc_genl_llc_sdreq, 1716 }, 1717 { 1718 .cmd = NFC_CMD_FW_DOWNLOAD, 1719 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1720 .doit = nfc_genl_fw_download, 1721 }, 1722 { 1723 .cmd = NFC_CMD_ENABLE_SE, 1724 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1725 .doit = nfc_genl_enable_se, 1726 }, 1727 { 1728 .cmd = NFC_CMD_DISABLE_SE, 1729 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1730 .doit = nfc_genl_disable_se, 1731 }, 1732 { 1733 .cmd = NFC_CMD_GET_SE, 1734 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1735 .dumpit = nfc_genl_dump_ses, 1736 .done = nfc_genl_dump_ses_done, 1737 }, 1738 { 1739 .cmd = NFC_CMD_SE_IO, 1740 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1741 .doit = nfc_genl_se_io, 1742 }, 1743 { 1744 .cmd = NFC_CMD_ACTIVATE_TARGET, 1745 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1746 .doit = nfc_genl_activate_target, 1747 }, 1748 { 1749 .cmd = NFC_CMD_VENDOR, 1750 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1751 .doit = nfc_genl_vendor_cmd, 1752 }, 1753 { 1754 .cmd = NFC_CMD_DEACTIVATE_TARGET, 1755 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1756 .doit = nfc_genl_deactivate_target, 1757 }, 1758 }; 1759 1760 static struct genl_family nfc_genl_family __ro_after_init = { 1761 .hdrsize = 0, 1762 .name = NFC_GENL_NAME, 1763 .version = NFC_GENL_VERSION, 1764 .maxattr = NFC_ATTR_MAX, 1765 .policy = nfc_genl_policy, 1766 .module = THIS_MODULE, 1767 .ops = nfc_genl_ops, 1768 .n_ops = ARRAY_SIZE(nfc_genl_ops), 1769 .mcgrps = nfc_genl_mcgrps, 1770 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps), 1771 }; 1772 1773 1774 struct urelease_work { 1775 struct work_struct w; 1776 u32 portid; 1777 }; 1778 nfc_urelease_event_work(struct work_struct * work)1779 static void nfc_urelease_event_work(struct work_struct *work) 1780 { 1781 struct urelease_work *w = container_of(work, struct urelease_work, w); 1782 struct class_dev_iter iter; 1783 struct nfc_dev *dev; 1784 1785 pr_debug("portid %d\n", w->portid); 1786 1787 mutex_lock(&nfc_devlist_mutex); 1788 1789 nfc_device_iter_init(&iter); 1790 dev = nfc_device_iter_next(&iter); 1791 1792 while (dev) { 1793 mutex_lock(&dev->genl_data.genl_data_mutex); 1794 1795 if (dev->genl_data.poll_req_portid == w->portid) { 1796 nfc_stop_poll(dev); 1797 dev->genl_data.poll_req_portid = 0; 1798 } 1799 1800 mutex_unlock(&dev->genl_data.genl_data_mutex); 1801 1802 dev = nfc_device_iter_next(&iter); 1803 } 1804 1805 nfc_device_iter_exit(&iter); 1806 1807 mutex_unlock(&nfc_devlist_mutex); 1808 1809 kfree(w); 1810 } 1811 nfc_genl_rcv_nl_event(struct notifier_block * this,unsigned long event,void * ptr)1812 static int nfc_genl_rcv_nl_event(struct notifier_block *this, 1813 unsigned long event, void *ptr) 1814 { 1815 struct netlink_notify *n = ptr; 1816 struct urelease_work *w; 1817 1818 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC) 1819 goto out; 1820 1821 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid); 1822 1823 w = kmalloc(sizeof(*w), GFP_ATOMIC); 1824 if (w) { 1825 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work); 1826 w->portid = n->portid; 1827 schedule_work((struct work_struct *) w); 1828 } 1829 1830 out: 1831 return NOTIFY_DONE; 1832 } 1833 nfc_genl_data_init(struct nfc_genl_data * genl_data)1834 void nfc_genl_data_init(struct nfc_genl_data *genl_data) 1835 { 1836 genl_data->poll_req_portid = 0; 1837 mutex_init(&genl_data->genl_data_mutex); 1838 } 1839 nfc_genl_data_exit(struct nfc_genl_data * genl_data)1840 void nfc_genl_data_exit(struct nfc_genl_data *genl_data) 1841 { 1842 mutex_destroy(&genl_data->genl_data_mutex); 1843 } 1844 1845 static struct notifier_block nl_notifier = { 1846 .notifier_call = nfc_genl_rcv_nl_event, 1847 }; 1848 1849 /** 1850 * nfc_genl_init() - Initialize netlink interface 1851 * 1852 * This initialization function registers the nfc netlink family. 1853 */ nfc_genl_init(void)1854 int __init nfc_genl_init(void) 1855 { 1856 int rc; 1857 1858 rc = genl_register_family(&nfc_genl_family); 1859 if (rc) 1860 return rc; 1861 1862 netlink_register_notifier(&nl_notifier); 1863 1864 return 0; 1865 } 1866 1867 /** 1868 * nfc_genl_exit() - Deinitialize netlink interface 1869 * 1870 * This exit function unregisters the nfc netlink family. 1871 */ nfc_genl_exit(void)1872 void nfc_genl_exit(void) 1873 { 1874 netlink_unregister_notifier(&nl_notifier); 1875 genl_unregister_family(&nfc_genl_family); 1876 } 1877