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
  25static const struct genl_multicast_group nfc_genl_mcgrps[] = {
  26	{ .name = NFC_GENL_MCAST_EVENT_NAME, },
  27};
  28
  29static struct genl_family nfc_genl_family;
  30static 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_TARGET_INDEX] = { .type = NLA_U32 },
  36	[NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
  37	[NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
  38	[NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
  39	[NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
  40	[NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
  41	[NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
  42	[NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
  43	[NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
  44	[NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
  45	[NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
  46				     .len = NFC_FIRMWARE_NAME_MAXSIZE },
  47	[NFC_ATTR_SE_INDEX] = { .type = NLA_U32 },
  48	[NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
  49	[NFC_ATTR_VENDOR_ID] = { .type = NLA_U32 },
  50	[NFC_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
  51	[NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
  52
  53};
  54
  55static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
  56	[NFC_SDP_ATTR_URI] = { .type = NLA_STRING,
  57			       .len = U8_MAX - 4 },
  58	[NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
  59};
  60
  61static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
  62				struct netlink_callback *cb, int flags)
  63{
  64	void *hdr;
  65
  66	hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
  67			  &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
  68	if (!hdr)
  69		return -EMSGSIZE;
  70
  71	genl_dump_check_consistent(cb, hdr);
  72
  73	if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
  74	    nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
  75	    nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
  76	    nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
  77		goto nla_put_failure;
  78	if (target->nfcid1_len > 0 &&
  79	    nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
  80		    target->nfcid1))
  81		goto nla_put_failure;
  82	if (target->sensb_res_len > 0 &&
  83	    nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
  84		    target->sensb_res))
  85		goto nla_put_failure;
  86	if (target->sensf_res_len > 0 &&
  87	    nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
  88		    target->sensf_res))
  89		goto nla_put_failure;
  90
  91	if (target->is_iso15693) {
  92		if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
  93			       target->iso15693_dsfid) ||
  94		    nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
  95			    sizeof(target->iso15693_uid), target->iso15693_uid))
  96			goto nla_put_failure;
  97	}
  98
  99	genlmsg_end(msg, hdr);
 100	return 0;
 101
 102nla_put_failure:
 103	genlmsg_cancel(msg, hdr);
 104	return -EMSGSIZE;
 105}
 106
 107static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
 108{
 109	const struct genl_dumpit_info *info = genl_dumpit_info(cb);
 110	struct nfc_dev *dev;
 111	u32 idx;
 112
 113	if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 114		return ERR_PTR(-EINVAL);
 115
 116	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 117
 118	dev = nfc_get_device(idx);
 119	if (!dev)
 120		return ERR_PTR(-ENODEV);
 121
 122	return dev;
 123}
 124
 125static int nfc_genl_dump_targets(struct sk_buff *skb,
 126				 struct netlink_callback *cb)
 127{
 128	int i = cb->args[0];
 129	struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
 130	int rc;
 131
 132	if (!dev) {
 133		dev = __get_device_from_cb(cb);
 134		if (IS_ERR(dev))
 135			return PTR_ERR(dev);
 136
 137		cb->args[1] = (long) dev;
 138	}
 139
 140	device_lock(&dev->dev);
 141
 142	cb->seq = dev->targets_generation;
 143
 144	while (i < dev->n_targets) {
 145		rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
 146					  NLM_F_MULTI);
 147		if (rc < 0)
 148			break;
 149
 150		i++;
 151	}
 152
 153	device_unlock(&dev->dev);
 154
 155	cb->args[0] = i;
 156
 157	return skb->len;
 158}
 159
 160static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
 161{
 162	struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
 163
 164	if (dev)
 165		nfc_put_device(dev);
 166
 167	return 0;
 168}
 169
 170int nfc_genl_targets_found(struct nfc_dev *dev)
 171{
 172	struct sk_buff *msg;
 173	void *hdr;
 174
 175	dev->genl_data.poll_req_portid = 0;
 176
 177	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 178	if (!msg)
 179		return -ENOMEM;
 180
 181	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 182			  NFC_EVENT_TARGETS_FOUND);
 183	if (!hdr)
 184		goto free_msg;
 185
 186	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 187		goto nla_put_failure;
 188
 189	genlmsg_end(msg, hdr);
 190
 191	return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
 192
 193nla_put_failure:
 194free_msg:
 195	nlmsg_free(msg);
 196	return -EMSGSIZE;
 197}
 198
 199int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
 200{
 201	struct sk_buff *msg;
 202	void *hdr;
 203
 204	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 205	if (!msg)
 206		return -ENOMEM;
 207
 208	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 209			  NFC_EVENT_TARGET_LOST);
 210	if (!hdr)
 211		goto free_msg;
 212
 213	if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
 214	    nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
 215		goto nla_put_failure;
 216
 217	genlmsg_end(msg, hdr);
 218
 219	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
 220
 221	return 0;
 222
 223nla_put_failure:
 224free_msg:
 225	nlmsg_free(msg);
 226	return -EMSGSIZE;
 227}
 228
 229int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
 230{
 231	struct sk_buff *msg;
 232	void *hdr;
 233
 234	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 235	if (!msg)
 236		return -ENOMEM;
 237
 238	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 239			  NFC_EVENT_TM_ACTIVATED);
 240	if (!hdr)
 241		goto free_msg;
 242
 243	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 244		goto nla_put_failure;
 245	if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
 246		goto nla_put_failure;
 247
 248	genlmsg_end(msg, hdr);
 249
 250	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
 251
 252	return 0;
 253
 254nla_put_failure:
 255free_msg:
 256	nlmsg_free(msg);
 257	return -EMSGSIZE;
 258}
 259
 260int nfc_genl_tm_deactivated(struct nfc_dev *dev)
 261{
 262	struct sk_buff *msg;
 263	void *hdr;
 264
 265	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 266	if (!msg)
 267		return -ENOMEM;
 268
 269	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 270			  NFC_EVENT_TM_DEACTIVATED);
 271	if (!hdr)
 272		goto free_msg;
 273
 274	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 275		goto nla_put_failure;
 276
 277	genlmsg_end(msg, hdr);
 278
 279	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
 280
 281	return 0;
 282
 283nla_put_failure:
 284free_msg:
 285	nlmsg_free(msg);
 286	return -EMSGSIZE;
 287}
 288
 289static int nfc_genl_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg)
 290{
 291	if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
 292	    nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
 293	    nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
 294	    nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
 295	    nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
 296		return -1;
 297	return 0;
 298}
 299
 300int nfc_genl_device_added(struct nfc_dev *dev)
 301{
 302	struct sk_buff *msg;
 303	void *hdr;
 304
 305	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 306	if (!msg)
 307		return -ENOMEM;
 308
 309	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 310			  NFC_EVENT_DEVICE_ADDED);
 311	if (!hdr)
 312		goto free_msg;
 313
 314	if (nfc_genl_setup_device_added(dev, msg))
 315		goto nla_put_failure;
 316
 317	genlmsg_end(msg, hdr);
 318
 319	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
 320
 321	return 0;
 322
 323nla_put_failure:
 324free_msg:
 325	nlmsg_free(msg);
 326	return -EMSGSIZE;
 327}
 328
 329int nfc_genl_device_removed(struct nfc_dev *dev)
 330{
 331	struct sk_buff *msg;
 332	void *hdr;
 333
 334	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 335	if (!msg)
 336		return -ENOMEM;
 337
 338	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 339			  NFC_EVENT_DEVICE_REMOVED);
 340	if (!hdr)
 341		goto free_msg;
 342
 343	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 344		goto nla_put_failure;
 345
 346	genlmsg_end(msg, hdr);
 347
 348	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
 349
 350	return 0;
 351
 352nla_put_failure:
 353free_msg:
 354	nlmsg_free(msg);
 355	return -EMSGSIZE;
 356}
 357
 358int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
 359{
 360	struct sk_buff *msg;
 361	struct nlattr *sdp_attr, *uri_attr;
 362	struct nfc_llcp_sdp_tlv *sdres;
 363	struct hlist_node *n;
 364	void *hdr;
 365	int rc = -EMSGSIZE;
 366	int i;
 367
 368	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 369	if (!msg)
 370		return -ENOMEM;
 371
 372	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 373			  NFC_EVENT_LLC_SDRES);
 374	if (!hdr)
 375		goto free_msg;
 376
 377	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 378		goto nla_put_failure;
 379
 380	sdp_attr = nla_nest_start_noflag(msg, NFC_ATTR_LLC_SDP);
 381	if (sdp_attr == NULL) {
 382		rc = -ENOMEM;
 383		goto nla_put_failure;
 384	}
 385
 386	i = 1;
 387	hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
 388		pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
 389
 390		uri_attr = nla_nest_start_noflag(msg, i++);
 391		if (uri_attr == NULL) {
 392			rc = -ENOMEM;
 393			goto nla_put_failure;
 394		}
 395
 396		if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
 397			goto nla_put_failure;
 398
 399		if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
 400			goto nla_put_failure;
 401
 402		nla_nest_end(msg, uri_attr);
 403
 404		hlist_del(&sdres->node);
 405
 406		nfc_llcp_free_sdp_tlv(sdres);
 407	}
 408
 409	nla_nest_end(msg, sdp_attr);
 410
 411	genlmsg_end(msg, hdr);
 412
 413	return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
 414
 415nla_put_failure:
 416free_msg:
 417	nlmsg_free(msg);
 418
 419	nfc_llcp_free_sdp_tlv_list(sdres_list);
 420
 421	return rc;
 422}
 423
 424int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
 425{
 426	struct sk_buff *msg;
 427	void *hdr;
 428
 429	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 430	if (!msg)
 431		return -ENOMEM;
 432
 433	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 434			  NFC_EVENT_SE_ADDED);
 435	if (!hdr)
 436		goto free_msg;
 437
 438	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
 439	    nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
 440	    nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
 441		goto nla_put_failure;
 442
 443	genlmsg_end(msg, hdr);
 444
 445	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
 446
 447	return 0;
 448
 449nla_put_failure:
 450free_msg:
 451	nlmsg_free(msg);
 452	return -EMSGSIZE;
 453}
 454
 455int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
 456{
 457	struct sk_buff *msg;
 458	void *hdr;
 459
 460	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 461	if (!msg)
 462		return -ENOMEM;
 463
 464	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 465			  NFC_EVENT_SE_REMOVED);
 466	if (!hdr)
 467		goto free_msg;
 468
 469	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
 470	    nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
 471		goto nla_put_failure;
 472
 473	genlmsg_end(msg, hdr);
 474
 475	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
 476
 477	return 0;
 478
 479nla_put_failure:
 480free_msg:
 481	nlmsg_free(msg);
 482	return -EMSGSIZE;
 483}
 484
 485int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
 486			    struct nfc_evt_transaction *evt_transaction)
 487{
 488	struct nfc_se *se;
 489	struct sk_buff *msg;
 490	void *hdr;
 491
 492	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 493	if (!msg)
 494		return -ENOMEM;
 495
 496	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 497			  NFC_EVENT_SE_TRANSACTION);
 498	if (!hdr)
 499		goto free_msg;
 500
 501	se = nfc_find_se(dev, se_idx);
 502	if (!se)
 503		goto free_msg;
 504
 505	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
 506	    nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
 507	    nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
 508	    nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
 509		    evt_transaction->aid) ||
 510	    nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
 511		    evt_transaction->params))
 512		goto nla_put_failure;
 513
 514	/* evt_transaction is no more used */
 515	devm_kfree(&dev->dev, evt_transaction);
 516
 517	genlmsg_end(msg, hdr);
 518
 519	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
 520
 521	return 0;
 522
 523nla_put_failure:
 524free_msg:
 525	/* evt_transaction is no more used */
 526	devm_kfree(&dev->dev, evt_transaction);
 527	nlmsg_free(msg);
 528	return -EMSGSIZE;
 529}
 530
 531int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
 532{
 533	struct nfc_se *se;
 534	struct sk_buff *msg;
 535	void *hdr;
 536
 537	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 538	if (!msg)
 539		return -ENOMEM;
 540
 541	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 542			  NFC_EVENT_SE_CONNECTIVITY);
 543	if (!hdr)
 544		goto free_msg;
 545
 546	se = nfc_find_se(dev, se_idx);
 547	if (!se)
 548		goto free_msg;
 549
 550	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
 551	    nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
 552	    nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
 553		goto nla_put_failure;
 554
 555	genlmsg_end(msg, hdr);
 556
 557	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
 558
 559	return 0;
 560
 561nla_put_failure:
 562free_msg:
 563	nlmsg_free(msg);
 564	return -EMSGSIZE;
 565}
 566
 567static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
 568				u32 portid, u32 seq,
 569				struct netlink_callback *cb,
 570				int flags)
 571{
 572	void *hdr;
 573
 574	hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
 575			  NFC_CMD_GET_DEVICE);
 576	if (!hdr)
 577		return -EMSGSIZE;
 578
 579	if (cb)
 580		genl_dump_check_consistent(cb, hdr);
 581
 582	if (nfc_genl_setup_device_added(dev, msg))
 583		goto nla_put_failure;
 584
 585	genlmsg_end(msg, hdr);
 586	return 0;
 587
 588nla_put_failure:
 589	genlmsg_cancel(msg, hdr);
 590	return -EMSGSIZE;
 591}
 592
 593static int nfc_genl_dump_devices(struct sk_buff *skb,
 594				 struct netlink_callback *cb)
 595{
 596	struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
 597	struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
 598	bool first_call = false;
 599
 600	if (!iter) {
 601		first_call = true;
 602		iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
 603		if (!iter)
 604			return -ENOMEM;
 605		cb->args[0] = (long) iter;
 606	}
 607
 608	mutex_lock(&nfc_devlist_mutex);
 609
 610	cb->seq = nfc_devlist_generation;
 611
 612	if (first_call) {
 613		nfc_device_iter_init(iter);
 614		dev = nfc_device_iter_next(iter);
 615	}
 616
 617	while (dev) {
 618		int rc;
 619
 620		rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
 621					  cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
 622		if (rc < 0)
 623			break;
 624
 625		dev = nfc_device_iter_next(iter);
 626	}
 627
 628	mutex_unlock(&nfc_devlist_mutex);
 629
 630	cb->args[1] = (long) dev;
 631
 632	return skb->len;
 633}
 634
 635static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
 636{
 637	struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
 638
 639	nfc_device_iter_exit(iter);
 640	kfree(iter);
 
 
 641
 642	return 0;
 643}
 644
 645int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
 646			       u8 comm_mode, u8 rf_mode)
 647{
 648	struct sk_buff *msg;
 649	void *hdr;
 650
 651	pr_debug("DEP link is up\n");
 652
 653	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 654	if (!msg)
 655		return -ENOMEM;
 656
 657	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
 658	if (!hdr)
 659		goto free_msg;
 660
 661	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 662		goto nla_put_failure;
 663	if (rf_mode == NFC_RF_INITIATOR &&
 664	    nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
 665		goto nla_put_failure;
 666	if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
 667	    nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
 668		goto nla_put_failure;
 669
 670	genlmsg_end(msg, hdr);
 671
 672	dev->dep_link_up = true;
 673
 674	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
 675
 676	return 0;
 677
 678nla_put_failure:
 679free_msg:
 680	nlmsg_free(msg);
 681	return -EMSGSIZE;
 682}
 683
 684int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
 685{
 686	struct sk_buff *msg;
 687	void *hdr;
 688
 689	pr_debug("DEP link is down\n");
 690
 691	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 692	if (!msg)
 693		return -ENOMEM;
 694
 695	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
 696			  NFC_CMD_DEP_LINK_DOWN);
 697	if (!hdr)
 698		goto free_msg;
 699
 700	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
 701		goto nla_put_failure;
 702
 703	genlmsg_end(msg, hdr);
 704
 705	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
 706
 707	return 0;
 708
 709nla_put_failure:
 710free_msg:
 711	nlmsg_free(msg);
 712	return -EMSGSIZE;
 713}
 714
 715static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
 716{
 717	struct sk_buff *msg;
 718	struct nfc_dev *dev;
 719	u32 idx;
 720	int rc = -ENOBUFS;
 721
 722	if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 723		return -EINVAL;
 724
 725	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 726
 727	dev = nfc_get_device(idx);
 728	if (!dev)
 729		return -ENODEV;
 730
 731	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 732	if (!msg) {
 733		rc = -ENOMEM;
 734		goto out_putdev;
 735	}
 736
 737	rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
 738				  NULL, 0);
 739	if (rc < 0)
 740		goto out_free;
 741
 742	nfc_put_device(dev);
 743
 744	return genlmsg_reply(msg, info);
 745
 746out_free:
 747	nlmsg_free(msg);
 748out_putdev:
 749	nfc_put_device(dev);
 750	return rc;
 751}
 752
 753static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
 754{
 755	struct nfc_dev *dev;
 756	int rc;
 757	u32 idx;
 758
 759	if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 760		return -EINVAL;
 761
 762	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 763
 764	dev = nfc_get_device(idx);
 765	if (!dev)
 766		return -ENODEV;
 767
 768	rc = nfc_dev_up(dev);
 769
 770	nfc_put_device(dev);
 771	return rc;
 772}
 773
 774static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
 775{
 776	struct nfc_dev *dev;
 777	int rc;
 778	u32 idx;
 779
 780	if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 781		return -EINVAL;
 782
 783	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 784
 785	dev = nfc_get_device(idx);
 786	if (!dev)
 787		return -ENODEV;
 788
 789	rc = nfc_dev_down(dev);
 790
 791	nfc_put_device(dev);
 792	return rc;
 793}
 794
 795static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
 796{
 797	struct nfc_dev *dev;
 798	int rc;
 799	u32 idx;
 800	u32 im_protocols = 0, tm_protocols = 0;
 801
 802	pr_debug("Poll start\n");
 803
 804	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
 805	    ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
 806	      !info->attrs[NFC_ATTR_PROTOCOLS]) &&
 807	      !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
 808		return -EINVAL;
 809
 810	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 811
 812	if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
 813		tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
 814
 815	if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
 816		im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
 817	else if (info->attrs[NFC_ATTR_PROTOCOLS])
 818		im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
 819
 820	dev = nfc_get_device(idx);
 821	if (!dev)
 822		return -ENODEV;
 823
 824	mutex_lock(&dev->genl_data.genl_data_mutex);
 825
 826	rc = nfc_start_poll(dev, im_protocols, tm_protocols);
 827	if (!rc)
 828		dev->genl_data.poll_req_portid = info->snd_portid;
 829
 830	mutex_unlock(&dev->genl_data.genl_data_mutex);
 831
 832	nfc_put_device(dev);
 833	return rc;
 834}
 835
 836static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
 837{
 838	struct nfc_dev *dev;
 839	int rc;
 840	u32 idx;
 841
 842	if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
 843		return -EINVAL;
 844
 845	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 846
 847	dev = nfc_get_device(idx);
 848	if (!dev)
 849		return -ENODEV;
 850
 851	device_lock(&dev->dev);
 852
 853	if (!dev->polling) {
 854		device_unlock(&dev->dev);
 855		nfc_put_device(dev);
 856		return -EINVAL;
 857	}
 858
 859	device_unlock(&dev->dev);
 860
 861	mutex_lock(&dev->genl_data.genl_data_mutex);
 862
 863	if (dev->genl_data.poll_req_portid != info->snd_portid) {
 864		rc = -EBUSY;
 865		goto out;
 866	}
 867
 868	rc = nfc_stop_poll(dev);
 869	dev->genl_data.poll_req_portid = 0;
 870
 871out:
 872	mutex_unlock(&dev->genl_data.genl_data_mutex);
 873	nfc_put_device(dev);
 874	return rc;
 875}
 876
 877static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
 878{
 879	struct nfc_dev *dev;
 880	u32 device_idx, target_idx, protocol;
 881	int rc;
 882
 883	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
 884	    !info->attrs[NFC_ATTR_TARGET_INDEX] ||
 885	    !info->attrs[NFC_ATTR_PROTOCOLS])
 886		return -EINVAL;
 887
 888	device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 889
 890	dev = nfc_get_device(device_idx);
 891	if (!dev)
 892		return -ENODEV;
 893
 894	target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
 895	protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
 896
 897	nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
 898	rc = nfc_activate_target(dev, target_idx, protocol);
 899
 900	nfc_put_device(dev);
 901	return rc;
 902}
 903
 904static int nfc_genl_deactivate_target(struct sk_buff *skb,
 905				      struct genl_info *info)
 906{
 907	struct nfc_dev *dev;
 908	u32 device_idx, target_idx;
 909	int rc;
 910
 911	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
 912	    !info->attrs[NFC_ATTR_TARGET_INDEX])
 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
 923	rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
 924
 925	nfc_put_device(dev);
 926	return rc;
 927}
 928
 929static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
 930{
 931	struct nfc_dev *dev;
 932	int rc, tgt_idx;
 933	u32 idx;
 934	u8 comm;
 935
 936	pr_debug("DEP link up\n");
 937
 938	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
 939	    !info->attrs[NFC_ATTR_COMM_MODE])
 940		return -EINVAL;
 941
 942	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 943	if (!info->attrs[NFC_ATTR_TARGET_INDEX])
 944		tgt_idx = NFC_TARGET_IDX_ANY;
 945	else
 946		tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
 947
 948	comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
 949
 950	if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
 951		return -EINVAL;
 952
 953	dev = nfc_get_device(idx);
 954	if (!dev)
 955		return -ENODEV;
 956
 957	rc = nfc_dep_link_up(dev, tgt_idx, comm);
 958
 959	nfc_put_device(dev);
 960
 961	return rc;
 962}
 963
 964static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
 965{
 966	struct nfc_dev *dev;
 967	int rc;
 968	u32 idx;
 969
 970	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
 971	    !info->attrs[NFC_ATTR_TARGET_INDEX])
 972		return -EINVAL;
 973
 974	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
 975
 976	dev = nfc_get_device(idx);
 977	if (!dev)
 978		return -ENODEV;
 979
 980	rc = nfc_dep_link_down(dev);
 981
 982	nfc_put_device(dev);
 983	return rc;
 984}
 985
 986static int nfc_genl_send_params(struct sk_buff *msg,
 987				struct nfc_llcp_local *local,
 988				u32 portid, u32 seq)
 989{
 990	void *hdr;
 991
 992	hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
 993			  NFC_CMD_LLC_GET_PARAMS);
 994	if (!hdr)
 995		return -EMSGSIZE;
 996
 997	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
 998	    nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
 999	    nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
1000	    nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
1001		goto nla_put_failure;
1002
1003	genlmsg_end(msg, hdr);
1004	return 0;
1005
1006nla_put_failure:
1007	genlmsg_cancel(msg, hdr);
1008	return -EMSGSIZE;
1009}
1010
1011static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
1012{
1013	struct nfc_dev *dev;
1014	struct nfc_llcp_local *local;
1015	int rc = 0;
1016	struct sk_buff *msg = NULL;
1017	u32 idx;
1018
1019	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1020	    !info->attrs[NFC_ATTR_FIRMWARE_NAME])
1021		return -EINVAL;
1022
1023	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1024
1025	dev = nfc_get_device(idx);
1026	if (!dev)
1027		return -ENODEV;
1028
1029	device_lock(&dev->dev);
1030
1031	local = nfc_llcp_find_local(dev);
1032	if (!local) {
1033		rc = -ENODEV;
1034		goto exit;
1035	}
1036
1037	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1038	if (!msg) {
1039		rc = -ENOMEM;
1040		goto exit;
1041	}
1042
1043	rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1044
 
 
 
1045exit:
1046	device_unlock(&dev->dev);
1047
1048	nfc_put_device(dev);
1049
1050	if (rc < 0) {
1051		if (msg)
1052			nlmsg_free(msg);
1053
1054		return rc;
1055	}
1056
1057	return genlmsg_reply(msg, info);
1058}
1059
1060static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1061{
1062	struct nfc_dev *dev;
1063	struct nfc_llcp_local *local;
1064	u8 rw = 0;
1065	u16 miux = 0;
1066	u32 idx;
1067	int rc = 0;
1068
1069	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1070	    (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1071	     !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1072	     !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1073		return -EINVAL;
1074
1075	if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1076		rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1077
1078		if (rw > LLCP_MAX_RW)
1079			return -EINVAL;
1080	}
1081
1082	if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1083		miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1084
1085		if (miux > LLCP_MAX_MIUX)
1086			return -EINVAL;
1087	}
1088
1089	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1090
1091	dev = nfc_get_device(idx);
1092	if (!dev)
1093		return -ENODEV;
1094
1095	device_lock(&dev->dev);
1096
1097	local = nfc_llcp_find_local(dev);
1098	if (!local) {
1099		rc = -ENODEV;
1100		goto exit;
1101	}
1102
1103	if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1104		if (dev->dep_link_up) {
1105			rc = -EINPROGRESS;
1106			goto exit;
1107		}
1108
1109		local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1110	}
1111
1112	if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1113		local->rw = rw;
1114
1115	if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1116		local->miux = cpu_to_be16(miux);
1117
 
 
 
1118exit:
1119	device_unlock(&dev->dev);
1120
1121	nfc_put_device(dev);
1122
1123	return rc;
1124}
1125
1126static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1127{
1128	struct nfc_dev *dev;
1129	struct nfc_llcp_local *local;
1130	struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1131	u32 idx;
1132	u8 tid;
1133	char *uri;
1134	int rc = 0, rem;
1135	size_t uri_len, tlvs_len;
1136	struct hlist_head sdreq_list;
1137	struct nfc_llcp_sdp_tlv *sdreq;
1138
1139	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1140	    !info->attrs[NFC_ATTR_LLC_SDP])
1141		return -EINVAL;
1142
1143	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1144
1145	dev = nfc_get_device(idx);
1146	if (!dev)
1147		return -ENODEV;
1148
1149	device_lock(&dev->dev);
1150
1151	if (dev->dep_link_up == false) {
1152		rc = -ENOLINK;
1153		goto exit;
1154	}
1155
1156	local = nfc_llcp_find_local(dev);
1157	if (!local) {
1158		rc = -ENODEV;
1159		goto exit;
1160	}
1161
1162	INIT_HLIST_HEAD(&sdreq_list);
1163
1164	tlvs_len = 0;
1165
1166	nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1167		rc = nla_parse_nested_deprecated(sdp_attrs, NFC_SDP_ATTR_MAX,
1168						 attr, nfc_sdp_genl_policy,
1169						 info->extack);
1170
1171		if (rc != 0) {
1172			rc = -EINVAL;
1173			goto exit;
1174		}
1175
1176		if (!sdp_attrs[NFC_SDP_ATTR_URI])
1177			continue;
1178
1179		uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1180		if (uri_len == 0)
1181			continue;
1182
1183		uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1184		if (uri == NULL || *uri == 0)
1185			continue;
1186
1187		tid = local->sdreq_next_tid++;
1188
1189		sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1190		if (sdreq == NULL) {
1191			rc = -ENOMEM;
1192			goto exit;
1193		}
1194
1195		tlvs_len += sdreq->tlv_len;
1196
1197		hlist_add_head(&sdreq->node, &sdreq_list);
1198	}
1199
1200	if (hlist_empty(&sdreq_list)) {
1201		rc = -EINVAL;
1202		goto exit;
1203	}
1204
1205	rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
 
 
 
 
1206exit:
1207	device_unlock(&dev->dev);
1208
1209	nfc_put_device(dev);
1210
1211	return rc;
1212}
1213
1214static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1215{
1216	struct nfc_dev *dev;
1217	int rc;
1218	u32 idx;
1219	char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1220
1221	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || !info->attrs[NFC_ATTR_FIRMWARE_NAME])
1222		return -EINVAL;
1223
1224	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1225
1226	dev = nfc_get_device(idx);
1227	if (!dev)
1228		return -ENODEV;
1229
1230	nla_strscpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1231		    sizeof(firmware_name));
1232
1233	rc = nfc_fw_download(dev, firmware_name);
1234
1235	nfc_put_device(dev);
1236	return rc;
1237}
1238
1239int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1240			      u32 result)
1241{
1242	struct sk_buff *msg;
1243	void *hdr;
1244
1245	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1246	if (!msg)
1247		return -ENOMEM;
1248
1249	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1250			  NFC_CMD_FW_DOWNLOAD);
1251	if (!hdr)
1252		goto free_msg;
1253
1254	if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1255	    nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1256	    nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1257		goto nla_put_failure;
1258
1259	genlmsg_end(msg, hdr);
1260
1261	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1262
1263	return 0;
1264
1265nla_put_failure:
1266free_msg:
1267	nlmsg_free(msg);
1268	return -EMSGSIZE;
1269}
1270
1271static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1272{
1273	struct nfc_dev *dev;
1274	int rc;
1275	u32 idx, se_idx;
1276
1277	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1278	    !info->attrs[NFC_ATTR_SE_INDEX])
1279		return -EINVAL;
1280
1281	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1282	se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1283
1284	dev = nfc_get_device(idx);
1285	if (!dev)
1286		return -ENODEV;
1287
1288	rc = nfc_enable_se(dev, se_idx);
1289
1290	nfc_put_device(dev);
1291	return rc;
1292}
1293
1294static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1295{
1296	struct nfc_dev *dev;
1297	int rc;
1298	u32 idx, se_idx;
1299
1300	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1301	    !info->attrs[NFC_ATTR_SE_INDEX])
1302		return -EINVAL;
1303
1304	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1305	se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1306
1307	dev = nfc_get_device(idx);
1308	if (!dev)
1309		return -ENODEV;
1310
1311	rc = nfc_disable_se(dev, se_idx);
1312
1313	nfc_put_device(dev);
1314	return rc;
1315}
1316
1317static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1318				u32 portid, u32 seq,
1319				struct netlink_callback *cb,
1320				int flags)
1321{
1322	void *hdr;
1323	struct nfc_se *se, *n;
1324
1325	list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1326		hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1327				  NFC_CMD_GET_SE);
1328		if (!hdr)
1329			goto nla_put_failure;
1330
1331		if (cb)
1332			genl_dump_check_consistent(cb, hdr);
1333
1334		if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1335		    nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1336		    nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1337			goto nla_put_failure;
1338
1339		genlmsg_end(msg, hdr);
1340	}
1341
1342	return 0;
1343
1344nla_put_failure:
1345	genlmsg_cancel(msg, hdr);
1346	return -EMSGSIZE;
1347}
1348
1349static int nfc_genl_dump_ses(struct sk_buff *skb,
1350				 struct netlink_callback *cb)
1351{
1352	struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1353	struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1354	bool first_call = false;
1355
1356	if (!iter) {
1357		first_call = true;
1358		iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1359		if (!iter)
1360			return -ENOMEM;
1361		cb->args[0] = (long) iter;
1362	}
1363
1364	mutex_lock(&nfc_devlist_mutex);
1365
1366	cb->seq = nfc_devlist_generation;
1367
1368	if (first_call) {
1369		nfc_device_iter_init(iter);
1370		dev = nfc_device_iter_next(iter);
1371	}
1372
1373	while (dev) {
1374		int rc;
1375
1376		rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1377					  cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1378		if (rc < 0)
1379			break;
1380
1381		dev = nfc_device_iter_next(iter);
1382	}
1383
1384	mutex_unlock(&nfc_devlist_mutex);
1385
1386	cb->args[1] = (long) dev;
1387
1388	return skb->len;
1389}
1390
1391static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1392{
1393	struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1394
1395	nfc_device_iter_exit(iter);
1396	kfree(iter);
 
 
1397
1398	return 0;
1399}
1400
1401static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1402		     u8 *apdu, size_t apdu_length,
1403		     se_io_cb_t cb, void *cb_context)
1404{
1405	struct nfc_se *se;
1406	int rc;
1407
1408	pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1409
1410	device_lock(&dev->dev);
1411
1412	if (!device_is_registered(&dev->dev)) {
1413		rc = -ENODEV;
1414		goto error;
1415	}
1416
1417	if (!dev->dev_up) {
1418		rc = -ENODEV;
1419		goto error;
1420	}
1421
1422	if (!dev->ops->se_io) {
1423		rc = -EOPNOTSUPP;
1424		goto error;
1425	}
1426
1427	se = nfc_find_se(dev, se_idx);
1428	if (!se) {
1429		rc = -EINVAL;
1430		goto error;
1431	}
1432
1433	if (se->state != NFC_SE_ENABLED) {
1434		rc = -ENODEV;
1435		goto error;
1436	}
1437
1438	rc = dev->ops->se_io(dev, se_idx, apdu,
1439			apdu_length, cb, cb_context);
1440
 
 
 
1441error:
1442	device_unlock(&dev->dev);
 
1443	return rc;
1444}
1445
1446struct se_io_ctx {
1447	u32 dev_idx;
1448	u32 se_idx;
1449};
1450
1451static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1452{
1453	struct se_io_ctx *ctx = context;
1454	struct sk_buff *msg;
1455	void *hdr;
1456
1457	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1458	if (!msg) {
1459		kfree(ctx);
1460		return;
1461	}
1462
1463	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1464			  NFC_CMD_SE_IO);
1465	if (!hdr)
1466		goto free_msg;
1467
1468	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1469	    nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1470	    nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1471		goto nla_put_failure;
1472
1473	genlmsg_end(msg, hdr);
1474
1475	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1476
1477	kfree(ctx);
1478
1479	return;
1480
1481nla_put_failure:
1482free_msg:
1483	nlmsg_free(msg);
1484	kfree(ctx);
1485
1486	return;
1487}
1488
1489static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1490{
1491	struct nfc_dev *dev;
1492	struct se_io_ctx *ctx;
1493	u32 dev_idx, se_idx;
1494	u8 *apdu;
1495	size_t apdu_len;
 
1496
1497	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1498	    !info->attrs[NFC_ATTR_SE_INDEX] ||
1499	    !info->attrs[NFC_ATTR_SE_APDU])
1500		return -EINVAL;
1501
1502	dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1503	se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1504
1505	dev = nfc_get_device(dev_idx);
1506	if (!dev)
1507		return -ENODEV;
1508
1509	if (!dev->ops || !dev->ops->se_io)
1510		return -ENOTSUPP;
 
 
1511
1512	apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1513	if (apdu_len == 0)
1514		return -EINVAL;
 
 
1515
1516	apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1517	if (!apdu)
1518		return -EINVAL;
 
 
1519
1520	ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1521	if (!ctx)
1522		return -ENOMEM;
 
 
1523
1524	ctx->dev_idx = dev_idx;
1525	ctx->se_idx = se_idx;
1526
1527	return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
 
 
 
 
1528}
1529
1530static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1531			       struct genl_info *info)
1532{
1533	struct nfc_dev *dev;
1534	struct nfc_vendor_cmd *cmd;
1535	u32 dev_idx, vid, subcmd;
1536	u8 *data;
1537	size_t data_len;
1538	int i, err;
1539
1540	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1541	    !info->attrs[NFC_ATTR_VENDOR_ID] ||
1542	    !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1543		return -EINVAL;
1544
1545	dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1546	vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1547	subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1548
1549	dev = nfc_get_device(dev_idx);
1550	if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
1551		return -ENODEV;
1552
 
 
 
 
 
1553	if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1554		data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1555		data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1556		if (data_len == 0)
1557			return -EINVAL;
 
 
1558	} else {
1559		data = NULL;
1560		data_len = 0;
1561	}
1562
1563	for (i = 0; i < dev->n_vendor_cmds; i++) {
1564		cmd = &dev->vendor_cmds[i];
1565
1566		if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1567			continue;
1568
1569		dev->cur_cmd_info = info;
1570		err = cmd->doit(dev, data, data_len);
1571		dev->cur_cmd_info = NULL;
1572		return err;
1573	}
1574
1575	return -EOPNOTSUPP;
 
 
 
 
1576}
1577
1578/* message building helper */
1579static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1580				int flags, u8 cmd)
1581{
1582	/* since there is no private header just add the generic one */
1583	return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1584}
1585
1586static struct sk_buff *
1587__nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1588			   u32 portid, u32 seq,
1589			   enum nfc_attrs attr,
1590			   u32 oui, u32 subcmd, gfp_t gfp)
1591{
1592	struct sk_buff *skb;
1593	void *hdr;
1594
1595	skb = nlmsg_new(approxlen + 100, gfp);
1596	if (!skb)
1597		return NULL;
1598
1599	hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1600	if (!hdr) {
1601		kfree_skb(skb);
1602		return NULL;
1603	}
1604
1605	if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1606		goto nla_put_failure;
1607	if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1608		goto nla_put_failure;
1609	if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1610		goto nla_put_failure;
1611
1612	((void **)skb->cb)[0] = dev;
1613	((void **)skb->cb)[1] = hdr;
1614
1615	return skb;
1616
1617nla_put_failure:
1618	kfree_skb(skb);
1619	return NULL;
1620}
1621
1622struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1623						 enum nfc_attrs attr,
1624						 u32 oui, u32 subcmd,
1625						 int approxlen)
1626{
1627	if (WARN_ON(!dev->cur_cmd_info))
1628		return NULL;
1629
1630	return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1631					  dev->cur_cmd_info->snd_portid,
1632					  dev->cur_cmd_info->snd_seq, attr,
1633					  oui, subcmd, GFP_KERNEL);
1634}
1635EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1636
1637int nfc_vendor_cmd_reply(struct sk_buff *skb)
1638{
1639	struct nfc_dev *dev = ((void **)skb->cb)[0];
1640	void *hdr = ((void **)skb->cb)[1];
1641
1642	/* clear CB data for netlink core to own from now on */
1643	memset(skb->cb, 0, sizeof(skb->cb));
1644
1645	if (WARN_ON(!dev->cur_cmd_info)) {
1646		kfree_skb(skb);
1647		return -EINVAL;
1648	}
1649
1650	genlmsg_end(skb, hdr);
1651	return genlmsg_reply(skb, dev->cur_cmd_info);
1652}
1653EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1654
1655static const struct genl_ops nfc_genl_ops[] = {
1656	{
1657		.cmd = NFC_CMD_GET_DEVICE,
1658		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1659		.doit = nfc_genl_get_device,
1660		.dumpit = nfc_genl_dump_devices,
1661		.done = nfc_genl_dump_devices_done,
1662	},
1663	{
1664		.cmd = NFC_CMD_DEV_UP,
1665		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1666		.doit = nfc_genl_dev_up,
 
1667	},
1668	{
1669		.cmd = NFC_CMD_DEV_DOWN,
1670		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1671		.doit = nfc_genl_dev_down,
 
1672	},
1673	{
1674		.cmd = NFC_CMD_START_POLL,
1675		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1676		.doit = nfc_genl_start_poll,
 
1677	},
1678	{
1679		.cmd = NFC_CMD_STOP_POLL,
1680		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1681		.doit = nfc_genl_stop_poll,
 
1682	},
1683	{
1684		.cmd = NFC_CMD_DEP_LINK_UP,
1685		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1686		.doit = nfc_genl_dep_link_up,
 
1687	},
1688	{
1689		.cmd = NFC_CMD_DEP_LINK_DOWN,
1690		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1691		.doit = nfc_genl_dep_link_down,
 
1692	},
1693	{
1694		.cmd = NFC_CMD_GET_TARGET,
1695		.validate = GENL_DONT_VALIDATE_STRICT |
1696			    GENL_DONT_VALIDATE_DUMP_STRICT,
1697		.dumpit = nfc_genl_dump_targets,
1698		.done = nfc_genl_dump_targets_done,
1699	},
1700	{
1701		.cmd = NFC_CMD_LLC_GET_PARAMS,
1702		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1703		.doit = nfc_genl_llc_get_params,
1704	},
1705	{
1706		.cmd = NFC_CMD_LLC_SET_PARAMS,
1707		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1708		.doit = nfc_genl_llc_set_params,
 
1709	},
1710	{
1711		.cmd = NFC_CMD_LLC_SDREQ,
1712		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1713		.doit = nfc_genl_llc_sdreq,
 
1714	},
1715	{
1716		.cmd = NFC_CMD_FW_DOWNLOAD,
1717		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1718		.doit = nfc_genl_fw_download,
 
1719	},
1720	{
1721		.cmd = NFC_CMD_ENABLE_SE,
1722		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1723		.doit = nfc_genl_enable_se,
 
1724	},
1725	{
1726		.cmd = NFC_CMD_DISABLE_SE,
1727		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1728		.doit = nfc_genl_disable_se,
 
1729	},
1730	{
1731		.cmd = NFC_CMD_GET_SE,
1732		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1733		.dumpit = nfc_genl_dump_ses,
1734		.done = nfc_genl_dump_ses_done,
1735	},
1736	{
1737		.cmd = NFC_CMD_SE_IO,
1738		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1739		.doit = nfc_genl_se_io,
 
1740	},
1741	{
1742		.cmd = NFC_CMD_ACTIVATE_TARGET,
1743		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1744		.doit = nfc_genl_activate_target,
 
1745	},
1746	{
1747		.cmd = NFC_CMD_VENDOR,
1748		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1749		.doit = nfc_genl_vendor_cmd,
 
1750	},
1751	{
1752		.cmd = NFC_CMD_DEACTIVATE_TARGET,
1753		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1754		.doit = nfc_genl_deactivate_target,
 
1755	},
1756};
1757
1758static struct genl_family nfc_genl_family __ro_after_init = {
1759	.hdrsize = 0,
1760	.name = NFC_GENL_NAME,
1761	.version = NFC_GENL_VERSION,
1762	.maxattr = NFC_ATTR_MAX,
1763	.policy = nfc_genl_policy,
1764	.module = THIS_MODULE,
1765	.ops = nfc_genl_ops,
1766	.n_ops = ARRAY_SIZE(nfc_genl_ops),
 
1767	.mcgrps = nfc_genl_mcgrps,
1768	.n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
1769};
1770
1771
1772struct urelease_work {
1773	struct	work_struct w;
1774	u32	portid;
1775};
1776
1777static void nfc_urelease_event_work(struct work_struct *work)
1778{
1779	struct urelease_work *w = container_of(work, struct urelease_work, w);
1780	struct class_dev_iter iter;
1781	struct nfc_dev *dev;
1782
1783	pr_debug("portid %d\n", w->portid);
1784
1785	mutex_lock(&nfc_devlist_mutex);
1786
1787	nfc_device_iter_init(&iter);
1788	dev = nfc_device_iter_next(&iter);
1789
1790	while (dev) {
1791		mutex_lock(&dev->genl_data.genl_data_mutex);
1792
1793		if (dev->genl_data.poll_req_portid == w->portid) {
1794			nfc_stop_poll(dev);
1795			dev->genl_data.poll_req_portid = 0;
1796		}
1797
1798		mutex_unlock(&dev->genl_data.genl_data_mutex);
1799
1800		dev = nfc_device_iter_next(&iter);
1801	}
1802
1803	nfc_device_iter_exit(&iter);
1804
1805	mutex_unlock(&nfc_devlist_mutex);
1806
1807	kfree(w);
1808}
1809
1810static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1811				 unsigned long event, void *ptr)
1812{
1813	struct netlink_notify *n = ptr;
1814	struct urelease_work *w;
1815
1816	if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1817		goto out;
1818
1819	pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1820
1821	w = kmalloc(sizeof(*w), GFP_ATOMIC);
1822	if (w) {
1823		INIT_WORK(&w->w, nfc_urelease_event_work);
1824		w->portid = n->portid;
1825		schedule_work(&w->w);
1826	}
1827
1828out:
1829	return NOTIFY_DONE;
1830}
1831
1832void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1833{
1834	genl_data->poll_req_portid = 0;
1835	mutex_init(&genl_data->genl_data_mutex);
1836}
1837
1838void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1839{
1840	mutex_destroy(&genl_data->genl_data_mutex);
1841}
1842
1843static struct notifier_block nl_notifier = {
1844	.notifier_call  = nfc_genl_rcv_nl_event,
1845};
1846
1847/**
1848 * nfc_genl_init() - Initialize netlink interface
1849 *
1850 * This initialization function registers the nfc netlink family.
1851 */
1852int __init nfc_genl_init(void)
1853{
1854	int rc;
1855
1856	rc = genl_register_family(&nfc_genl_family);
1857	if (rc)
1858		return rc;
1859
1860	netlink_register_notifier(&nl_notifier);
1861
1862	return 0;
1863}
1864
1865/**
1866 * nfc_genl_exit() - Deinitialize netlink interface
1867 *
1868 * This exit function unregisters the nfc netlink family.
1869 */
1870void nfc_genl_exit(void)
1871{
1872	netlink_unregister_notifier(&nl_notifier);
1873	genl_unregister_family(&nfc_genl_family);
1874}