1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 *  SMB2 version specific operations
   4 *
   5 *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   6 */
   7
   8#include <linux/pagemap.h>
   9#include <linux/vfs.h>
  10#include <linux/falloc.h>
  11#include <linux/scatterlist.h>
  12#include <linux/uuid.h>
  13#include <linux/sort.h>
  14#include <crypto/aead.h>
  15#include <linux/fiemap.h>
  16#include <uapi/linux/magic.h>
  17#include "cifsfs.h"
  18#include "cifsglob.h"
  19#include "smb2pdu.h"
  20#include "smb2proto.h"
  21#include "cifsproto.h"
  22#include "cifs_debug.h"
  23#include "cifs_unicode.h"
  24#include "smb2status.h"
  25#include "smb2glob.h"
  26#include "cifs_ioctl.h"
  27#include "smbdirect.h"
  28#include "fscache.h"
  29#include "fs_context.h"
  30#include "cached_dir.h"
  31
  32/* Change credits for different ops and return the total number of credits */
  33static int
  34change_conf(struct TCP_Server_Info *server)
  35{
  36	server->credits += server->echo_credits + server->oplock_credits;
  37	server->oplock_credits = server->echo_credits = 0;
  38	switch (server->credits) {
  39	case 0:
  40		return 0;
  41	case 1:
  42		server->echoes = false;
  43		server->oplocks = false;
  44		break;
  45	case 2:
  46		server->echoes = true;
  47		server->oplocks = false;
  48		server->echo_credits = 1;
  49		break;
  50	default:
  51		server->echoes = true;
  52		if (enable_oplocks) {
  53			server->oplocks = true;
  54			server->oplock_credits = 1;
  55		} else
  56			server->oplocks = false;
  57
  58		server->echo_credits = 1;
  59	}
  60	server->credits -= server->echo_credits + server->oplock_credits;
  61	return server->credits + server->echo_credits + server->oplock_credits;
  62}
  63
  64static void
  65smb2_add_credits(struct TCP_Server_Info *server,
  66		 const struct cifs_credits *credits, const int optype)
  67{
  68	int *val, rc = -1;
  69	int scredits, in_flight;
  70	unsigned int add = credits->value;
  71	unsigned int instance = credits->instance;
  72	bool reconnect_detected = false;
  73	bool reconnect_with_invalid_credits = false;
  74
  75	spin_lock(&server->req_lock);
  76	val = server->ops->get_credits_field(server, optype);
  77
  78	/* eg found case where write overlapping reconnect messed up credits */
  79	if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  80		reconnect_with_invalid_credits = true;
  81
  82	if ((instance == 0) || (instance == server->reconnect_instance))
  83		*val += add;
  84	else
  85		reconnect_detected = true;
  86
  87	if (*val > 65000) {
  88		*val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  89		pr_warn_once("server overflowed SMB3 credits\n");
  90		trace_smb3_overflow_credits(server->CurrentMid,
  91					    server->conn_id, server->hostname, *val,
  92					    add, server->in_flight);
  93	}
  94	server->in_flight--;
  95	if (server->in_flight == 0 &&
  96	   ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
  97	   ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
  98		rc = change_conf(server);
  99	/*
 100	 * Sometimes server returns 0 credits on oplock break ack - we need to
 101	 * rebalance credits in this case.
 102	 */
 103	else if (server->in_flight > 0 && server->oplock_credits == 0 &&
 104		 server->oplocks) {
 105		if (server->credits > 1) {
 106			server->credits--;
 107			server->oplock_credits++;
 108		}
 109	}
 110	scredits = *val;
 111	in_flight = server->in_flight;
 112	spin_unlock(&server->req_lock);
 113	wake_up(&server->request_q);
 114
 115	if (reconnect_detected) {
 116		trace_smb3_reconnect_detected(server->CurrentMid,
 117			server->conn_id, server->hostname, scredits, add, in_flight);
 118
 119		cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 120			 add, instance);
 121	}
 122
 123	if (reconnect_with_invalid_credits) {
 124		trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 125			server->conn_id, server->hostname, scredits, add, in_flight);
 126		cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
 127			 optype, scredits, add);
 128	}
 129
 130	spin_lock(&server->srv_lock);
 131	if (server->tcpStatus == CifsNeedReconnect
 132	    || server->tcpStatus == CifsExiting) {
 133		spin_unlock(&server->srv_lock);
 134		return;
 135	}
 136	spin_unlock(&server->srv_lock);
 137
 138	switch (rc) {
 139	case -1:
 140		/* change_conf hasn't been executed */
 141		break;
 142	case 0:
 143		cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 144		break;
 145	case 1:
 146		cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 147		break;
 148	case 2:
 149		cifs_dbg(FYI, "disabling oplocks\n");
 150		break;
 151	default:
 152		/* change_conf rebalanced credits for different types */
 153		break;
 154	}
 155
 156	trace_smb3_add_credits(server->CurrentMid,
 157			server->conn_id, server->hostname, scredits, add, in_flight);
 158	cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
 159}
 160
 161static void
 162smb2_set_credits(struct TCP_Server_Info *server, const int val)
 163{
 164	int scredits, in_flight;
 165
 166	spin_lock(&server->req_lock);
 167	server->credits = val;
 168	if (val == 1)
 169		server->reconnect_instance++;
 170	scredits = server->credits;
 171	in_flight = server->in_flight;
 172	spin_unlock(&server->req_lock);
 173
 174	trace_smb3_set_credits(server->CurrentMid,
 175			server->conn_id, server->hostname, scredits, val, in_flight);
 176	cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
 177
 178	/* don't log while holding the lock */
 179	if (val == 1)
 180		cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 181}
 182
 183static int *
 184smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 185{
 186	switch (optype) {
 187	case CIFS_ECHO_OP:
 188		return &server->echo_credits;
 189	case CIFS_OBREAK_OP:
 190		return &server->oplock_credits;
 191	default:
 192		return &server->credits;
 193	}
 194}
 195
 196static unsigned int
 197smb2_get_credits(struct mid_q_entry *mid)
 198{
 199	return mid->credits_received;
 
 
 
 
 
 
 200}
 201
 202static int
 203smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 204		      unsigned int *num, struct cifs_credits *credits)
 205{
 206	int rc = 0;
 207	unsigned int scredits, in_flight;
 208
 209	spin_lock(&server->req_lock);
 210	while (1) {
 211		if (server->credits <= 0) {
 212			spin_unlock(&server->req_lock);
 213			cifs_num_waiters_inc(server);
 214			rc = wait_event_killable(server->request_q,
 215				has_credits(server, &server->credits, 1));
 216			cifs_num_waiters_dec(server);
 217			if (rc)
 218				return rc;
 219			spin_lock(&server->req_lock);
 220		} else {
 221			spin_unlock(&server->req_lock);
 222			spin_lock(&server->srv_lock);
 223			if (server->tcpStatus == CifsExiting) {
 224				spin_unlock(&server->srv_lock);
 225				return -ENOENT;
 226			}
 227			spin_unlock(&server->srv_lock);
 228
 229			spin_lock(&server->req_lock);
 230			scredits = server->credits;
 231			/* can deadlock with reopen */
 232			if (scredits <= 8) {
 233				*num = SMB2_MAX_BUFFER_SIZE;
 234				credits->value = 0;
 235				credits->instance = 0;
 236				break;
 237			}
 238
 239			/* leave some credits for reopen and other ops */
 240			scredits -= 8;
 241			*num = min_t(unsigned int, size,
 242				     scredits * SMB2_MAX_BUFFER_SIZE);
 243
 244			credits->value =
 245				DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 246			credits->instance = server->reconnect_instance;
 247			server->credits -= credits->value;
 248			server->in_flight++;
 249			if (server->in_flight > server->max_in_flight)
 250				server->max_in_flight = server->in_flight;
 251			break;
 252		}
 253	}
 254	scredits = server->credits;
 255	in_flight = server->in_flight;
 256	spin_unlock(&server->req_lock);
 257
 258	trace_smb3_wait_credits(server->CurrentMid,
 259			server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
 260	cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
 261			__func__, credits->value, scredits);
 262
 263	return rc;
 264}
 265
 266static int
 267smb2_adjust_credits(struct TCP_Server_Info *server,
 268		    struct cifs_credits *credits,
 269		    const unsigned int payload_size)
 270{
 271	int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 272	int scredits, in_flight;
 273
 274	if (!credits->value || credits->value == new_val)
 275		return 0;
 276
 277	if (credits->value < new_val) {
 278		trace_smb3_too_many_credits(server->CurrentMid,
 279				server->conn_id, server->hostname, 0, credits->value - new_val, 0);
 280		cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 281				credits->value, new_val);
 282
 283		return -ENOTSUPP;
 284	}
 285
 286	spin_lock(&server->req_lock);
 287
 288	if (server->reconnect_instance != credits->instance) {
 289		scredits = server->credits;
 290		in_flight = server->in_flight;
 291		spin_unlock(&server->req_lock);
 292
 293		trace_smb3_reconnect_detected(server->CurrentMid,
 294			server->conn_id, server->hostname, scredits,
 295			credits->value - new_val, in_flight);
 296		cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 297			 credits->value - new_val);
 298		return -EAGAIN;
 299	}
 300
 301	server->credits += credits->value - new_val;
 302	scredits = server->credits;
 303	in_flight = server->in_flight;
 304	spin_unlock(&server->req_lock);
 305	wake_up(&server->request_q);
 306
 307	trace_smb3_adj_credits(server->CurrentMid,
 308			server->conn_id, server->hostname, scredits,
 309			credits->value - new_val, in_flight);
 310	cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
 311			__func__, credits->value - new_val, scredits);
 312
 313	credits->value = new_val;
 314
 315	return 0;
 316}
 317
 318static __u64
 319smb2_get_next_mid(struct TCP_Server_Info *server)
 320{
 321	__u64 mid;
 322	/* for SMB2 we need the current value */
 323	spin_lock(&server->mid_lock);
 324	mid = server->CurrentMid++;
 325	spin_unlock(&server->mid_lock);
 326	return mid;
 327}
 328
 329static void
 330smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 331{
 332	spin_lock(&server->mid_lock);
 333	if (server->CurrentMid >= val)
 334		server->CurrentMid -= val;
 335	spin_unlock(&server->mid_lock);
 336}
 337
 338static struct mid_q_entry *
 339__smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 340{
 341	struct mid_q_entry *mid;
 342	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 343	__u64 wire_mid = le64_to_cpu(shdr->MessageId);
 344
 345	if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 346		cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 347		return NULL;
 348	}
 349
 350	spin_lock(&server->mid_lock);
 351	list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 352		if ((mid->mid == wire_mid) &&
 353		    (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 354		    (mid->command == shdr->Command)) {
 355			kref_get(&mid->refcount);
 356			if (dequeue) {
 357				list_del_init(&mid->qhead);
 358				mid->mid_flags |= MID_DELETED;
 359			}
 360			spin_unlock(&server->mid_lock);
 361			return mid;
 362		}
 363	}
 364	spin_unlock(&server->mid_lock);
 365	return NULL;
 366}
 367
 368static struct mid_q_entry *
 369smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 370{
 371	return __smb2_find_mid(server, buf, false);
 372}
 373
 374static struct mid_q_entry *
 375smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 376{
 377	return __smb2_find_mid(server, buf, true);
 378}
 379
 380static void
 381smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 382{
 383#ifdef CONFIG_CIFS_DEBUG2
 384	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 385
 386	cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 387		 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 388		 shdr->Id.SyncId.ProcessId);
 389	cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 390		 server->ops->calc_smb_size(buf));
 391#endif
 392}
 393
 394static bool
 395smb2_need_neg(struct TCP_Server_Info *server)
 396{
 397	return server->max_read == 0;
 398}
 399
 400static int
 401smb2_negotiate(const unsigned int xid,
 402	       struct cifs_ses *ses,
 403	       struct TCP_Server_Info *server)
 404{
 405	int rc;
 406
 407	spin_lock(&server->mid_lock);
 408	server->CurrentMid = 0;
 409	spin_unlock(&server->mid_lock);
 410	rc = SMB2_negotiate(xid, ses, server);
 411	/* BB we probably don't need to retry with modern servers */
 412	if (rc == -EAGAIN)
 413		rc = -EHOSTDOWN;
 414	return rc;
 415}
 416
 417static unsigned int
 418smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 419{
 420	struct TCP_Server_Info *server = tcon->ses->server;
 421	unsigned int wsize;
 422
 423	/* start with specified wsize, or default */
 424	wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
 425	wsize = min_t(unsigned int, wsize, server->max_write);
 
 
 
 
 
 
 
 
 
 
 426	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 427		wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 428
 429	return wsize;
 430}
 431
 432static unsigned int
 433smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 434{
 435	struct TCP_Server_Info *server = tcon->ses->server;
 436	unsigned int wsize;
 437
 438	/* start with specified wsize, or default */
 439	wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
 440	wsize = min_t(unsigned int, wsize, server->max_write);
 441#ifdef CONFIG_CIFS_SMB_DIRECT
 442	if (server->rdma) {
 443		if (server->sign)
 444			/*
 445			 * Account for SMB2 data transfer packet header and
 446			 * possible encryption header
 447			 */
 448			wsize = min_t(unsigned int,
 449				wsize,
 450				server->smbd_conn->max_fragmented_send_size -
 451					SMB2_READWRITE_PDU_HEADER_SIZE -
 452					sizeof(struct smb2_transform_hdr));
 453		else
 454			wsize = min_t(unsigned int,
 455				wsize, server->smbd_conn->max_readwrite_size);
 456	}
 457#endif
 458	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 459		wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 460
 461	return wsize;
 462}
 463
 464static unsigned int
 465smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 466{
 467	struct TCP_Server_Info *server = tcon->ses->server;
 468	unsigned int rsize;
 469
 470	/* start with specified rsize, or default */
 471	rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
 472	rsize = min_t(unsigned int, rsize, server->max_read);
 
 
 
 
 
 
 
 
 
 
 473
 474	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 475		rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 476
 477	return rsize;
 478}
 479
 480static unsigned int
 481smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 482{
 483	struct TCP_Server_Info *server = tcon->ses->server;
 484	unsigned int rsize;
 485
 486	/* start with specified rsize, or default */
 487	rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
 488	rsize = min_t(unsigned int, rsize, server->max_read);
 489#ifdef CONFIG_CIFS_SMB_DIRECT
 490	if (server->rdma) {
 491		if (server->sign)
 492			/*
 493			 * Account for SMB2 data transfer packet header and
 494			 * possible encryption header
 495			 */
 496			rsize = min_t(unsigned int,
 497				rsize,
 498				server->smbd_conn->max_fragmented_recv_size -
 499					SMB2_READWRITE_PDU_HEADER_SIZE -
 500					sizeof(struct smb2_transform_hdr));
 501		else
 502			rsize = min_t(unsigned int,
 503				rsize, server->smbd_conn->max_readwrite_size);
 504	}
 505#endif
 506
 507	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 508		rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 509
 510	return rsize;
 511}
 512
 513static int
 514parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 515			size_t buf_len, struct cifs_ses *ses, bool in_mount)
 
 
 516{
 517	struct network_interface_info_ioctl_rsp *p;
 518	struct sockaddr_in *addr4;
 519	struct sockaddr_in6 *addr6;
 520	struct iface_info_ipv4 *p4;
 521	struct iface_info_ipv6 *p6;
 522	struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
 523	struct cifs_server_iface tmp_iface;
 524	ssize_t bytes_left;
 525	size_t next = 0;
 526	int nb_iface = 0;
 527	int rc = 0, ret = 0;
 528
 529	bytes_left = buf_len;
 530	p = buf;
 531
 532	spin_lock(&ses->iface_lock);
 533	/*
 534	 * Go through iface_list and do kref_put to remove
 535	 * any unused ifaces. ifaces in use will be removed
 536	 * when the last user calls a kref_put on it
 537	 */
 538	list_for_each_entry_safe(iface, niface, &ses->iface_list,
 539				 iface_head) {
 540		iface->is_active = 0;
 541		kref_put(&iface->refcount, release_iface);
 542		ses->iface_count--;
 
 
 
 
 
 
 
 543	}
 544	spin_unlock(&ses->iface_lock);
 
 
 
 
 
 
 
 
 
 545
 546	/*
 547	 * Samba server e.g. can return an empty interface list in some cases,
 548	 * which would only be a problem if we were requesting multichannel
 549	 */
 550	if (bytes_left == 0) {
 551		/* avoid spamming logs every 10 minutes, so log only in mount */
 552		if ((ses->chan_max > 1) && in_mount)
 553			cifs_dbg(VFS,
 554				 "multichannel not available\n"
 555				 "Empty network interface list returned by server %s\n",
 556				 ses->server->hostname);
 557		rc = -EINVAL;
 558		goto out;
 559	}
 560
 
 
 
 561	while (bytes_left >= sizeof(*p)) {
 562		memset(&tmp_iface, 0, sizeof(tmp_iface));
 563		tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
 564		tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 565		tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 
 
 
 
 566
 567		switch (p->Family) {
 568		/*
 569		 * The kernel and wire socket structures have the same
 570		 * layout and use network byte order but make the
 571		 * conversion explicit in case either one changes.
 572		 */
 573		case INTERNETWORK:
 574			addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
 575			p4 = (struct iface_info_ipv4 *)p->Buffer;
 576			addr4->sin_family = AF_INET;
 577			memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 578
 579			/* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 580			addr4->sin_port = cpu_to_be16(CIFS_PORT);
 581
 582			cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 583				 &addr4->sin_addr);
 584			break;
 585		case INTERNETWORKV6:
 586			addr6 =	(struct sockaddr_in6 *)&tmp_iface.sockaddr;
 587			p6 = (struct iface_info_ipv6 *)p->Buffer;
 588			addr6->sin6_family = AF_INET6;
 589			memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 590
 591			/* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 592			addr6->sin6_flowinfo = 0;
 593			addr6->sin6_scope_id = 0;
 594			addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 595
 596			cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 597				 &addr6->sin6_addr);
 598			break;
 599		default:
 600			cifs_dbg(VFS,
 601				 "%s: skipping unsupported socket family\n",
 602				 __func__);
 603			goto next_iface;
 604		}
 605
 606		/*
 607		 * The iface_list is assumed to be sorted by speed.
 608		 * Check if the new interface exists in that list.
 609		 * NEVER change iface. it could be in use.
 610		 * Add a new one instead
 611		 */
 612		spin_lock(&ses->iface_lock);
 613		iface = niface = NULL;
 614		list_for_each_entry_safe(iface, niface, &ses->iface_list,
 615					 iface_head) {
 616			ret = iface_cmp(iface, &tmp_iface);
 617			if (!ret) {
 618				/* just get a ref so that it doesn't get picked/freed */
 619				iface->is_active = 1;
 620				kref_get(&iface->refcount);
 621				ses->iface_count++;
 622				spin_unlock(&ses->iface_lock);
 623				goto next_iface;
 624			} else if (ret < 0) {
 625				/* all remaining ifaces are slower */
 626				kref_get(&iface->refcount);
 627				break;
 628			}
 629		}
 630		spin_unlock(&ses->iface_lock);
 631
 632		/* no match. insert the entry in the list */
 633		info = kmalloc(sizeof(struct cifs_server_iface),
 634			       GFP_KERNEL);
 635		if (!info) {
 636			rc = -ENOMEM;
 637			goto out;
 638		}
 639		memcpy(info, &tmp_iface, sizeof(tmp_iface));
 640
 641		/* add this new entry to the list */
 642		kref_init(&info->refcount);
 643		info->is_active = 1;
 644
 645		cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
 646		cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 647		cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 648			 le32_to_cpu(p->Capability));
 649
 650		spin_lock(&ses->iface_lock);
 651		if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
 652			list_add_tail(&info->iface_head, &iface->iface_head);
 653			kref_put(&iface->refcount, release_iface);
 654		} else
 655			list_add_tail(&info->iface_head, &ses->iface_list);
 656
 657		ses->iface_count++;
 658		spin_unlock(&ses->iface_lock);
 659		ses->iface_last_update = jiffies;
 660next_iface:
 661		nb_iface++;
 662		next = le32_to_cpu(p->Next);
 663		if (!next) {
 664			bytes_left -= sizeof(*p);
 665			break;
 666		}
 667		p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 668		bytes_left -= next;
 669	}
 670
 671	if (!nb_iface) {
 672		cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 673		rc = -EINVAL;
 674		goto out;
 675	}
 676
 677	/* Azure rounds the buffer size up 8, to a 16 byte boundary */
 678	if ((bytes_left > 8) || p->Next)
 679		cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 680
 681
 682	if (!ses->iface_count) {
 683		rc = -EINVAL;
 684		goto out;
 685	}
 686
 687out:
 
 
 
 
 
 688	return rc;
 689}
 690
 691int
 692SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
 
 693{
 694	int rc;
 695	unsigned int ret_data_len = 0;
 696	struct network_interface_info_ioctl_rsp *out_buf = NULL;
 
 
 697	struct cifs_ses *ses = tcon->ses;
 698
 699	rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 700			FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 701			NULL /* no data input */, 0 /* no data input */,
 702			CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 703	if (rc == -EOPNOTSUPP) {
 704		cifs_dbg(FYI,
 705			 "server does not support query network interfaces\n");
 706		goto out;
 707	} else if (rc != 0) {
 708		cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 709		goto out;
 710	}
 711
 712	rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 
 713	if (rc)
 714		goto out;
 715
 
 
 
 
 
 
 
 716out:
 717	kfree(out_buf);
 718	return rc;
 719}
 720
 721static void
 722smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 723	      struct cifs_sb_info *cifs_sb)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 724{
 725	int rc;
 726	__le16 srch_path = 0; /* Null - open root of share */
 727	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 728	struct cifs_open_parms oparms;
 729	struct cifs_fid fid;
 730	struct cached_fid *cfid = NULL;
 731
 732	oparms.tcon = tcon;
 733	oparms.desired_access = FILE_READ_ATTRIBUTES;
 734	oparms.disposition = FILE_OPEN;
 735	oparms.create_options = cifs_create_options(cifs_sb, 0);
 736	oparms.fid = &fid;
 737	oparms.reconnect = false;
 738
 739	rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 740	if (rc == 0)
 741		memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 742	else
 743		rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 744			       NULL, NULL);
 
 
 
 745	if (rc)
 746		return;
 747
 748	SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 749
 750	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 751			FS_ATTRIBUTE_INFORMATION);
 752	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 753			FS_DEVICE_INFORMATION);
 754	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 755			FS_VOLUME_INFORMATION);
 756	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 757			FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 758	if (cfid == NULL)
 759		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 760	else
 761		close_cached_dir(cfid);
 762}
 763
 764static void
 765smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 766	      struct cifs_sb_info *cifs_sb)
 767{
 768	int rc;
 769	__le16 srch_path = 0; /* Null - open root of share */
 770	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 771	struct cifs_open_parms oparms;
 772	struct cifs_fid fid;
 773
 774	oparms.tcon = tcon;
 775	oparms.desired_access = FILE_READ_ATTRIBUTES;
 776	oparms.disposition = FILE_OPEN;
 777	oparms.create_options = cifs_create_options(cifs_sb, 0);
 778	oparms.fid = &fid;
 779	oparms.reconnect = false;
 780
 781	rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 782		       NULL, NULL);
 783	if (rc)
 784		return;
 785
 786	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 787			FS_ATTRIBUTE_INFORMATION);
 788	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 789			FS_DEVICE_INFORMATION);
 790	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 791}
 792
 793static int
 794smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 795			struct cifs_sb_info *cifs_sb, const char *full_path)
 796{
 797	int rc;
 798	__le16 *utf16_path;
 799	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 800	int err_buftype = CIFS_NO_BUFFER;
 801	struct cifs_open_parms oparms;
 802	struct kvec err_iov = {};
 803	struct cifs_fid fid;
 804	struct cached_fid *cfid;
 805
 806	rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 807	if (!rc) {
 808		if (cfid->has_lease) {
 809			close_cached_dir(cfid);
 810			return 0;
 811		}
 812		close_cached_dir(cfid);
 813	}
 814
 815	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 816	if (!utf16_path)
 817		return -ENOMEM;
 818
 819	oparms.tcon = tcon;
 820	oparms.desired_access = FILE_READ_ATTRIBUTES;
 821	oparms.disposition = FILE_OPEN;
 822	oparms.create_options = cifs_create_options(cifs_sb, 0);
 
 
 
 823	oparms.fid = &fid;
 824	oparms.reconnect = false;
 825
 826	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 827		       &err_iov, &err_buftype);
 828	if (rc) {
 829		struct smb2_hdr *hdr = err_iov.iov_base;
 830
 831		if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 832			goto out;
 833		/*
 834		 * Handle weird Windows SMB server behaviour. It responds with
 835		 * STATUS_OBJECT_NAME_INVALID code to SMB2 QUERY_INFO request
 836		 * for "\<server>\<dfsname>\<linkpath>" DFS reference,
 837		 * where <dfsname> contains non-ASCII unicode symbols.
 838		 */
 839		if (rc != -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) &&
 840		    hdr->Status == STATUS_OBJECT_NAME_INVALID)
 841			rc = -EREMOTE;
 842		if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 843		    (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 844			rc = -EOPNOTSUPP;
 845		goto out;
 846	}
 847
 848	rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 849
 850out:
 851	free_rsp_buf(err_buftype, err_iov.iov_base);
 852	kfree(utf16_path);
 853	return rc;
 854}
 855
 856static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 857			     struct cifs_sb_info *cifs_sb, const char *full_path,
 858			     u64 *uniqueid, struct cifs_open_info_data *data)
 
 859{
 860	*uniqueid = le64_to_cpu(data->fi.IndexNumber);
 861	return 0;
 862}
 863
 864static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 865				struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 
 866{
 867	struct cifs_fid *fid = &cfile->fid;
 
 868
 869	if (cfile->symlink_target) {
 870		data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 871		if (!data->symlink_target)
 872			return -ENOMEM;
 873	}
 874	return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
 
 
 
 
 
 875}
 876
 877#ifdef CONFIG_CIFS_XATTR
 878static ssize_t
 879move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 880		     struct smb2_file_full_ea_info *src, size_t src_size,
 881		     const unsigned char *ea_name)
 882{
 883	int rc = 0;
 884	unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 885	char *name, *value;
 886	size_t buf_size = dst_size;
 887	size_t name_len, value_len, user_name_len;
 888
 889	while (src_size > 0) {
 
 890		name_len = (size_t)src->ea_name_length;
 
 891		value_len = (size_t)le16_to_cpu(src->ea_value_length);
 892
 893		if (name_len == 0)
 894			break;
 895
 896		if (src_size < 8 + name_len + 1 + value_len) {
 897			cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 898			rc = -EIO;
 899			goto out;
 900		}
 901
 902		name = &src->ea_data[0];
 903		value = &src->ea_data[src->ea_name_length + 1];
 904
 905		if (ea_name) {
 906			if (ea_name_len == name_len &&
 907			    memcmp(ea_name, name, name_len) == 0) {
 908				rc = value_len;
 909				if (dst_size == 0)
 910					goto out;
 911				if (dst_size < value_len) {
 912					rc = -ERANGE;
 913					goto out;
 914				}
 915				memcpy(dst, value, value_len);
 916				goto out;
 917			}
 918		} else {
 919			/* 'user.' plus a terminating null */
 920			user_name_len = 5 + 1 + name_len;
 921
 922			if (buf_size == 0) {
 923				/* skip copy - calc size only */
 924				rc += user_name_len;
 925			} else if (dst_size >= user_name_len) {
 926				dst_size -= user_name_len;
 927				memcpy(dst, "user.", 5);
 928				dst += 5;
 929				memcpy(dst, src->ea_data, name_len);
 930				dst += name_len;
 931				*dst = 0;
 932				++dst;
 933				rc += user_name_len;
 934			} else {
 935				/* stop before overrun buffer */
 936				rc = -ERANGE;
 937				break;
 938			}
 939		}
 940
 941		if (!src->next_entry_offset)
 942			break;
 943
 944		if (src_size < le32_to_cpu(src->next_entry_offset)) {
 945			/* stop before overrun buffer */
 946			rc = -ERANGE;
 947			break;
 948		}
 949		src_size -= le32_to_cpu(src->next_entry_offset);
 950		src = (void *)((char *)src +
 951			       le32_to_cpu(src->next_entry_offset));
 952	}
 953
 954	/* didn't find the named attribute */
 955	if (ea_name)
 956		rc = -ENODATA;
 957
 958out:
 959	return (ssize_t)rc;
 960}
 961
 962static ssize_t
 963smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 964	       const unsigned char *path, const unsigned char *ea_name,
 965	       char *ea_data, size_t buf_size,
 966	       struct cifs_sb_info *cifs_sb)
 967{
 968	int rc;
 
 969	struct kvec rsp_iov = {NULL, 0};
 970	int buftype = CIFS_NO_BUFFER;
 971	struct smb2_query_info_rsp *rsp;
 972	struct smb2_file_full_ea_info *info = NULL;
 973
 974	rc = smb2_query_info_compound(xid, tcon, path,
 
 
 
 
 975				      FILE_READ_EA,
 976				      FILE_FULL_EA_INFORMATION,
 977				      SMB2_O_INFO_FILE,
 978				      CIFSMaxBufSize -
 979				      MAX_SMB2_CREATE_RESPONSE_SIZE -
 980				      MAX_SMB2_CLOSE_RESPONSE_SIZE,
 981				      &rsp_iov, &buftype, cifs_sb);
 982	if (rc) {
 983		/*
 984		 * If ea_name is NULL (listxattr) and there are no EAs,
 985		 * return 0 as it's not an error. Otherwise, the specified
 986		 * ea_name was not found.
 987		 */
 988		if (!ea_name && rc == -ENODATA)
 989			rc = 0;
 990		goto qeas_exit;
 991	}
 992
 993	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
 994	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
 995			       le32_to_cpu(rsp->OutputBufferLength),
 996			       &rsp_iov,
 997			       sizeof(struct smb2_file_full_ea_info));
 998	if (rc)
 999		goto qeas_exit;
1000
1001	info = (struct smb2_file_full_ea_info *)(
1002			le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1003	rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1004			le32_to_cpu(rsp->OutputBufferLength), ea_name);
1005
1006 qeas_exit:
 
1007	free_rsp_buf(buftype, rsp_iov.iov_base);
1008	return rc;
1009}
1010
1011
1012static int
1013smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1014	    const char *path, const char *ea_name, const void *ea_value,
1015	    const __u16 ea_value_len, const struct nls_table *nls_codepage,
1016	    struct cifs_sb_info *cifs_sb)
1017{
1018	struct cifs_ses *ses = tcon->ses;
1019	struct TCP_Server_Info *server = cifs_pick_channel(ses);
1020	__le16 *utf16_path = NULL;
1021	int ea_name_len = strlen(ea_name);
1022	int flags = CIFS_CP_CREATE_CLOSE_OP;
1023	int len;
1024	struct smb_rqst rqst[3];
1025	int resp_buftype[3];
1026	struct kvec rsp_iov[3];
1027	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1028	struct cifs_open_parms oparms;
1029	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1030	struct cifs_fid fid;
1031	struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1032	unsigned int size[1];
1033	void *data[1];
1034	struct smb2_file_full_ea_info *ea = NULL;
1035	struct kvec close_iov[1];
1036	struct smb2_query_info_rsp *rsp;
1037	int rc, used_len = 0;
1038
1039	if (smb3_encryption_required(tcon))
1040		flags |= CIFS_TRANSFORM_REQ;
1041
1042	if (ea_name_len > 255)
1043		return -EINVAL;
1044
1045	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1046	if (!utf16_path)
1047		return -ENOMEM;
1048
1049	memset(rqst, 0, sizeof(rqst));
1050	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1051	memset(rsp_iov, 0, sizeof(rsp_iov));
1052
1053	if (ses->server->ops->query_all_EAs) {
1054		if (!ea_value) {
1055			rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1056							     ea_name, NULL, 0,
1057							     cifs_sb);
1058			if (rc == -ENODATA)
1059				goto sea_exit;
1060		} else {
1061			/* If we are adding a attribute we should first check
1062			 * if there will be enough space available to store
1063			 * the new EA. If not we should not add it since we
1064			 * would not be able to even read the EAs back.
1065			 */
1066			rc = smb2_query_info_compound(xid, tcon, path,
1067				      FILE_READ_EA,
1068				      FILE_FULL_EA_INFORMATION,
1069				      SMB2_O_INFO_FILE,
1070				      CIFSMaxBufSize -
1071				      MAX_SMB2_CREATE_RESPONSE_SIZE -
1072				      MAX_SMB2_CLOSE_RESPONSE_SIZE,
1073				      &rsp_iov[1], &resp_buftype[1], cifs_sb);
1074			if (rc == 0) {
1075				rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1076				used_len = le32_to_cpu(rsp->OutputBufferLength);
1077			}
1078			free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1079			resp_buftype[1] = CIFS_NO_BUFFER;
1080			memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1081			rc = 0;
1082
1083			/* Use a fudge factor of 256 bytes in case we collide
1084			 * with a different set_EAs command.
1085			 */
1086			if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1087			   MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1088			   used_len + ea_name_len + ea_value_len + 1) {
1089				rc = -ENOSPC;
1090				goto sea_exit;
1091			}
1092		}
1093	}
1094
1095	/* Open */
1096	memset(&open_iov, 0, sizeof(open_iov));
1097	rqst[0].rq_iov = open_iov;
1098	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1099
1100	memset(&oparms, 0, sizeof(oparms));
1101	oparms.tcon = tcon;
1102	oparms.desired_access = FILE_WRITE_EA;
1103	oparms.disposition = FILE_OPEN;
1104	oparms.create_options = cifs_create_options(cifs_sb, 0);
 
 
 
1105	oparms.fid = &fid;
1106	oparms.reconnect = false;
1107
1108	rc = SMB2_open_init(tcon, server,
1109			    &rqst[0], &oplock, &oparms, utf16_path);
1110	if (rc)
1111		goto sea_exit;
1112	smb2_set_next_command(tcon, &rqst[0]);
1113
1114
1115	/* Set Info */
1116	memset(&si_iov, 0, sizeof(si_iov));
1117	rqst[1].rq_iov = si_iov;
1118	rqst[1].rq_nvec = 1;
1119
1120	len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1121	ea = kzalloc(len, GFP_KERNEL);
1122	if (ea == NULL) {
1123		rc = -ENOMEM;
1124		goto sea_exit;
1125	}
1126
1127	ea->ea_name_length = ea_name_len;
1128	ea->ea_value_length = cpu_to_le16(ea_value_len);
1129	memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1130	memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1131
1132	size[0] = len;
1133	data[0] = ea;
1134
1135	rc = SMB2_set_info_init(tcon, server,
1136				&rqst[1], COMPOUND_FID,
1137				COMPOUND_FID, current->tgid,
1138				FILE_FULL_EA_INFORMATION,
1139				SMB2_O_INFO_FILE, 0, data, size);
1140	if (rc)
1141		goto sea_exit;
1142	smb2_set_next_command(tcon, &rqst[1]);
1143	smb2_set_related(&rqst[1]);
1144
1145
1146	/* Close */
1147	memset(&close_iov, 0, sizeof(close_iov));
1148	rqst[2].rq_iov = close_iov;
1149	rqst[2].rq_nvec = 1;
1150	rc = SMB2_close_init(tcon, server,
1151			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1152	if (rc)
1153		goto sea_exit;
1154	smb2_set_related(&rqst[2]);
1155
1156	rc = compound_send_recv(xid, ses, server,
1157				flags, 3, rqst,
1158				resp_buftype, rsp_iov);
1159	/* no need to bump num_remote_opens because handle immediately closed */
1160
1161 sea_exit:
1162	kfree(ea);
1163	kfree(utf16_path);
1164	SMB2_open_free(&rqst[0]);
1165	SMB2_set_info_free(&rqst[1]);
1166	SMB2_close_free(&rqst[2]);
1167	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1168	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1169	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1170	return rc;
1171}
1172#endif
1173
1174static bool
1175smb2_can_echo(struct TCP_Server_Info *server)
1176{
1177	return server->echoes;
1178}
1179
1180static void
1181smb2_clear_stats(struct cifs_tcon *tcon)
1182{
1183	int i;
1184
1185	for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1186		atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1187		atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1188	}
1189}
1190
1191static void
1192smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1193{
1194	seq_puts(m, "\n\tShare Capabilities:");
1195	if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1196		seq_puts(m, " DFS,");
1197	if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1198		seq_puts(m, " CONTINUOUS AVAILABILITY,");
1199	if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1200		seq_puts(m, " SCALEOUT,");
1201	if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1202		seq_puts(m, " CLUSTER,");
1203	if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1204		seq_puts(m, " ASYMMETRIC,");
1205	if (tcon->capabilities == 0)
1206		seq_puts(m, " None");
1207	if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1208		seq_puts(m, " Aligned,");
1209	if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1210		seq_puts(m, " Partition Aligned,");
1211	if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1212		seq_puts(m, " SSD,");
1213	if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1214		seq_puts(m, " TRIM-support,");
1215
1216	seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1217	seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1218	if (tcon->perf_sector_size)
1219		seq_printf(m, "\tOptimal sector size: 0x%x",
1220			   tcon->perf_sector_size);
1221	seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1222}
1223
1224static void
1225smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1226{
1227	atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1228	atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1229
1230	/*
1231	 *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1232	 *  totals (requests sent) since those SMBs are per-session not per tcon
1233	 */
1234	seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1235		   (long long)(tcon->bytes_read),
1236		   (long long)(tcon->bytes_written));
1237	seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1238		   atomic_read(&tcon->num_local_opens),
1239		   atomic_read(&tcon->num_remote_opens));
1240	seq_printf(m, "\nTreeConnects: %d total %d failed",
1241		   atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1242		   atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1243	seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1244		   atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1245		   atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1246	seq_printf(m, "\nCreates: %d total %d failed",
1247		   atomic_read(&sent[SMB2_CREATE_HE]),
1248		   atomic_read(&failed[SMB2_CREATE_HE]));
1249	seq_printf(m, "\nCloses: %d total %d failed",
1250		   atomic_read(&sent[SMB2_CLOSE_HE]),
1251		   atomic_read(&failed[SMB2_CLOSE_HE]));
1252	seq_printf(m, "\nFlushes: %d total %d failed",
1253		   atomic_read(&sent[SMB2_FLUSH_HE]),
1254		   atomic_read(&failed[SMB2_FLUSH_HE]));
1255	seq_printf(m, "\nReads: %d total %d failed",
1256		   atomic_read(&sent[SMB2_READ_HE]),
1257		   atomic_read(&failed[SMB2_READ_HE]));
1258	seq_printf(m, "\nWrites: %d total %d failed",
1259		   atomic_read(&sent[SMB2_WRITE_HE]),
1260		   atomic_read(&failed[SMB2_WRITE_HE]));
1261	seq_printf(m, "\nLocks: %d total %d failed",
1262		   atomic_read(&sent[SMB2_LOCK_HE]),
1263		   atomic_read(&failed[SMB2_LOCK_HE]));
1264	seq_printf(m, "\nIOCTLs: %d total %d failed",
1265		   atomic_read(&sent[SMB2_IOCTL_HE]),
1266		   atomic_read(&failed[SMB2_IOCTL_HE]));
1267	seq_printf(m, "\nQueryDirectories: %d total %d failed",
1268		   atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1269		   atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1270	seq_printf(m, "\nChangeNotifies: %d total %d failed",
1271		   atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1272		   atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1273	seq_printf(m, "\nQueryInfos: %d total %d failed",
1274		   atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1275		   atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1276	seq_printf(m, "\nSetInfos: %d total %d failed",
1277		   atomic_read(&sent[SMB2_SET_INFO_HE]),
1278		   atomic_read(&failed[SMB2_SET_INFO_HE]));
1279	seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1280		   atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1281		   atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1282}
1283
1284static void
1285smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1286{
1287	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1288	struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1289
1290	cfile->fid.persistent_fid = fid->persistent_fid;
1291	cfile->fid.volatile_fid = fid->volatile_fid;
1292	cfile->fid.access = fid->access;
1293#ifdef CONFIG_CIFS_DEBUG2
1294	cfile->fid.mid = fid->mid;
1295#endif /* CIFS_DEBUG2 */
1296	server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1297				      &fid->purge_cache);
1298	cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1299	memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1300}
1301
1302static void
1303smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1304		struct cifs_fid *fid)
1305{
1306	SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1307}
1308
1309static void
1310smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1311		   struct cifsFileInfo *cfile)
1312{
1313	struct smb2_file_network_open_info file_inf;
1314	struct inode *inode;
1315	int rc;
1316
1317	rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1318		   cfile->fid.volatile_fid, &file_inf);
1319	if (rc)
1320		return;
1321
1322	inode = d_inode(cfile->dentry);
1323
1324	spin_lock(&inode->i_lock);
1325	CIFS_I(inode)->time = jiffies;
1326
1327	/* Creation time should not need to be updated on close */
1328	if (file_inf.LastWriteTime)
1329		inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1330	if (file_inf.ChangeTime)
1331		inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1332	if (file_inf.LastAccessTime)
1333		inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1334
1335	/*
1336	 * i_blocks is not related to (i_size / i_blksize),
1337	 * but instead 512 byte (2**9) size is required for
1338	 * calculating num blocks.
1339	 */
1340	if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1341		inode->i_blocks =
1342			(512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1343
1344	/* End of file and Attributes should not have to be updated on close */
1345	spin_unlock(&inode->i_lock);
1346}
1347
1348static int
1349SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1350		     u64 persistent_fid, u64 volatile_fid,
1351		     struct copychunk_ioctl *pcchunk)
1352{
1353	int rc;
1354	unsigned int ret_data_len;
1355	struct resume_key_req *res_key;
1356
1357	rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1358			FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1359			CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
 
1360
1361	if (rc == -EOPNOTSUPP) {
1362		pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1363		goto req_res_key_exit;
1364	} else if (rc) {
1365		cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1366		goto req_res_key_exit;
1367	}
1368	if (ret_data_len < sizeof(struct resume_key_req)) {
1369		cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1370		rc = -EINVAL;
1371		goto req_res_key_exit;
1372	}
1373	memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1374
1375req_res_key_exit:
1376	kfree(res_key);
1377	return rc;
1378}
1379
1380struct iqi_vars {
1381	struct smb_rqst rqst[3];
1382	struct kvec rsp_iov[3];
1383	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1384	struct kvec qi_iov[1];
1385	struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1386	struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1387	struct kvec close_iov[1];
1388};
1389
1390static int
1391smb2_ioctl_query_info(const unsigned int xid,
1392		      struct cifs_tcon *tcon,
1393		      struct cifs_sb_info *cifs_sb,
1394		      __le16 *path, int is_dir,
1395		      unsigned long p)
1396{
1397	struct iqi_vars *vars;
1398	struct smb_rqst *rqst;
1399	struct kvec *rsp_iov;
1400	struct cifs_ses *ses = tcon->ses;
1401	struct TCP_Server_Info *server = cifs_pick_channel(ses);
1402	char __user *arg = (char __user *)p;
1403	struct smb_query_info qi;
1404	struct smb_query_info __user *pqi;
1405	int rc = 0;
1406	int flags = CIFS_CP_CREATE_CLOSE_OP;
1407	struct smb2_query_info_rsp *qi_rsp = NULL;
1408	struct smb2_ioctl_rsp *io_rsp = NULL;
1409	void *buffer = NULL;
 
1410	int resp_buftype[3];
 
 
1411	struct cifs_open_parms oparms;
1412	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1413	struct cifs_fid fid;
 
 
 
 
1414	unsigned int size[2];
1415	void *data[2];
1416	int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1417	void (*free_req1_func)(struct smb_rqst *r);
1418
1419	vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1420	if (vars == NULL)
1421		return -ENOMEM;
1422	rqst = &vars->rqst[0];
1423	rsp_iov = &vars->rsp_iov[0];
1424
 
1425	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
 
1426
1427	if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1428		rc = -EFAULT;
1429		goto free_vars;
1430	}
1431	if (qi.output_buffer_length > 1024) {
1432		rc = -EINVAL;
1433		goto free_vars;
1434	}
1435
1436	if (!ses || !server) {
1437		rc = -EIO;
1438		goto free_vars;
1439	}
 
1440
1441	if (smb3_encryption_required(tcon))
1442		flags |= CIFS_TRANSFORM_REQ;
1443
1444	if (qi.output_buffer_length) {
1445		buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1446		if (IS_ERR(buffer)) {
1447			rc = PTR_ERR(buffer);
1448			goto free_vars;
1449		}
 
 
1450	}
1451
1452	/* Open */
1453	rqst[0].rq_iov = &vars->open_iov[0];
 
1454	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1455
1456	memset(&oparms, 0, sizeof(oparms));
1457	oparms.tcon = tcon;
1458	oparms.disposition = FILE_OPEN;
1459	oparms.create_options = cifs_create_options(cifs_sb, create_options);
 
 
 
1460	oparms.fid = &fid;
1461	oparms.reconnect = false;
1462
1463	if (qi.flags & PASSTHRU_FSCTL) {
1464		switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1465		case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1466			oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1467			break;
1468		case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1469			oparms.desired_access = GENERIC_ALL;
1470			break;
1471		case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1472			oparms.desired_access = GENERIC_READ;
1473			break;
1474		case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1475			oparms.desired_access = GENERIC_WRITE;
1476			break;
1477		}
1478	} else if (qi.flags & PASSTHRU_SET_INFO) {
1479		oparms.desired_access = GENERIC_WRITE;
1480	} else {
1481		oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1482	}
1483
1484	rc = SMB2_open_init(tcon, server,
1485			    &rqst[0], &oplock, &oparms, path);
1486	if (rc)
1487		goto free_output_buffer;
1488	smb2_set_next_command(tcon, &rqst[0]);
1489
1490	/* Query */
1491	if (qi.flags & PASSTHRU_FSCTL) {
1492		/* Can eventually relax perm check since server enforces too */
1493		if (!capable(CAP_SYS_ADMIN)) {
1494			rc = -EPERM;
1495			goto free_open_req;
 
 
 
 
 
 
 
 
 
1496		}
1497		rqst[1].rq_iov = &vars->io_iov[0];
1498		rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1499
1500		rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1501				     qi.info_type, buffer, qi.output_buffer_length,
1502				     CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1503				     MAX_SMB2_CLOSE_RESPONSE_SIZE);
1504		free_req1_func = SMB2_ioctl_free;
1505	} else if (qi.flags == PASSTHRU_SET_INFO) {
1506		/* Can eventually relax perm check since server enforces too */
1507		if (!capable(CAP_SYS_ADMIN)) {
1508			rc = -EPERM;
1509			goto free_open_req;
1510		}
1511		if (qi.output_buffer_length < 8) {
1512			rc = -EINVAL;
1513			goto free_open_req;
1514		}
1515		rqst[1].rq_iov = &vars->si_iov[0];
1516		rqst[1].rq_nvec = 1;
1517
1518		/* MS-FSCC 2.4.13 FileEndOfFileInformation */
1519		size[0] = 8;
1520		data[0] = buffer;
1521
1522		rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1523					current->tgid, FILE_END_OF_FILE_INFORMATION,
1524					SMB2_O_INFO_FILE, 0, data, size);
1525		free_req1_func = SMB2_set_info_free;
1526	} else if (qi.flags == PASSTHRU_QUERY_INFO) {
1527		rqst[1].rq_iov = &vars->qi_iov[0];
 
1528		rqst[1].rq_nvec = 1;
1529
1530		rc = SMB2_query_info_init(tcon, server,
1531				  &rqst[1], COMPOUND_FID,
1532				  COMPOUND_FID, qi.file_info_class,
1533				  qi.info_type, qi.additional_information,
1534				  qi.input_buffer_length,
1535				  qi.output_buffer_length, buffer);
1536		free_req1_func = SMB2_query_info_free;
1537	} else { /* unknown flags */
1538		cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1539			      qi.flags);
1540		rc = -EINVAL;
1541	}
1542
1543	if (rc)
1544		goto free_open_req;
1545	smb2_set_next_command(tcon, &rqst[1]);
1546	smb2_set_related(&rqst[1]);
1547
1548	/* Close */
1549	rqst[2].rq_iov = &vars->close_iov[0];
 
1550	rqst[2].rq_nvec = 1;
1551
1552	rc = SMB2_close_init(tcon, server,
1553			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1554	if (rc)
1555		goto free_req_1;
1556	smb2_set_related(&rqst[2]);
1557
1558	rc = compound_send_recv(xid, ses, server,
1559				flags, 3, rqst,
1560				resp_buftype, rsp_iov);
1561	if (rc)
1562		goto out;
1563
1564	/* No need to bump num_remote_opens since handle immediately closed */
1565	if (qi.flags & PASSTHRU_FSCTL) {
1566		pqi = (struct smb_query_info __user *)arg;
1567		io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1568		if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1569			qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1570		if (qi.input_buffer_length > 0 &&
1571		    le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1572		    > rsp_iov[1].iov_len) {
1573			rc = -EFAULT;
1574			goto out;
1575		}
1576
1577		if (copy_to_user(&pqi->input_buffer_length,
1578				 &qi.input_buffer_length,
1579				 sizeof(qi.input_buffer_length))) {
1580			rc = -EFAULT;
1581			goto out;
1582		}
1583
1584		if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1585				 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1586				 qi.input_buffer_length))
1587			rc = -EFAULT;
 
 
1588	} else {
1589		pqi = (struct smb_query_info __user *)arg;
1590		qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1591		if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1592			qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1593		if (copy_to_user(&pqi->input_buffer_length,
1594				 &qi.input_buffer_length,
1595				 sizeof(qi.input_buffer_length))) {
1596			rc = -EFAULT;
1597			goto out;
1598		}
1599
1600		if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1601				 qi.input_buffer_length))
1602			rc = -EFAULT;
 
 
1603	}
1604
1605out:
 
 
 
 
 
 
 
 
1606	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1607	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1608	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1609	SMB2_close_free(&rqst[2]);
1610free_req_1:
1611	free_req1_func(&rqst[1]);
1612free_open_req:
1613	SMB2_open_free(&rqst[0]);
1614free_output_buffer:
1615	kfree(buffer);
1616free_vars:
1617	kfree(vars);
1618	return rc;
1619}
1620
1621static ssize_t
1622smb2_copychunk_range(const unsigned int xid,
1623			struct cifsFileInfo *srcfile,
1624			struct cifsFileInfo *trgtfile, u64 src_off,
1625			u64 len, u64 dest_off)
1626{
1627	int rc;
1628	unsigned int ret_data_len;
1629	struct copychunk_ioctl *pcchunk;
1630	struct copychunk_ioctl_rsp *retbuf = NULL;
1631	struct cifs_tcon *tcon;
1632	int chunks_copied = 0;
1633	bool chunk_sizes_updated = false;
1634	ssize_t bytes_written, total_bytes_written = 0;
1635
1636	pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 
1637	if (pcchunk == NULL)
1638		return -ENOMEM;
1639
1640	cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1641	/* Request a key from the server to identify the source of the copy */
1642	rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1643				srcfile->fid.persistent_fid,
1644				srcfile->fid.volatile_fid, pcchunk);
1645
1646	/* Note: request_res_key sets res_key null only if rc !=0 */
1647	if (rc)
1648		goto cchunk_out;
1649
1650	/* For now array only one chunk long, will make more flexible later */
1651	pcchunk->ChunkCount = cpu_to_le32(1);
1652	pcchunk->Reserved = 0;
1653	pcchunk->Reserved2 = 0;
1654
1655	tcon = tlink_tcon(trgtfile->tlink);
1656
1657	while (len > 0) {
1658		pcchunk->SourceOffset = cpu_to_le64(src_off);
1659		pcchunk->TargetOffset = cpu_to_le64(dest_off);
1660		pcchunk->Length =
1661			cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1662
1663		/* Request server copy to target from src identified by key */
1664		kfree(retbuf);
1665		retbuf = NULL;
1666		rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1667			trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1668			(char *)pcchunk, sizeof(struct copychunk_ioctl),
1669			CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
 
1670		if (rc == 0) {
1671			if (ret_data_len !=
1672					sizeof(struct copychunk_ioctl_rsp)) {
1673				cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1674				rc = -EIO;
1675				goto cchunk_out;
1676			}
1677			if (retbuf->TotalBytesWritten == 0) {
1678				cifs_dbg(FYI, "no bytes copied\n");
1679				rc = -EIO;
1680				goto cchunk_out;
1681			}
1682			/*
1683			 * Check if server claimed to write more than we asked
1684			 */
1685			if (le32_to_cpu(retbuf->TotalBytesWritten) >
1686			    le32_to_cpu(pcchunk->Length)) {
1687				cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1688				rc = -EIO;
1689				goto cchunk_out;
1690			}
1691			if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1692				cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1693				rc = -EIO;
1694				goto cchunk_out;
1695			}
1696			chunks_copied++;
1697
1698			bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1699			src_off += bytes_written;
1700			dest_off += bytes_written;
1701			len -= bytes_written;
1702			total_bytes_written += bytes_written;
1703
1704			cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1705				le32_to_cpu(retbuf->ChunksWritten),
1706				le32_to_cpu(retbuf->ChunkBytesWritten),
1707				bytes_written);
1708		} else if (rc == -EINVAL) {
1709			if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1710				goto cchunk_out;
1711
1712			cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1713				le32_to_cpu(retbuf->ChunksWritten),
1714				le32_to_cpu(retbuf->ChunkBytesWritten),
1715				le32_to_cpu(retbuf->TotalBytesWritten));
1716
1717			/*
1718			 * Check if this is the first request using these sizes,
1719			 * (ie check if copy succeed once with original sizes
1720			 * and check if the server gave us different sizes after
1721			 * we already updated max sizes on previous request).
1722			 * if not then why is the server returning an error now
1723			 */
1724			if ((chunks_copied != 0) || chunk_sizes_updated)
1725				goto cchunk_out;
1726
1727			/* Check that server is not asking us to grow size */
1728			if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1729					tcon->max_bytes_chunk)
1730				tcon->max_bytes_chunk =
1731					le32_to_cpu(retbuf->ChunkBytesWritten);
1732			else
1733				goto cchunk_out; /* server gave us bogus size */
1734
1735			/* No need to change MaxChunks since already set to 1 */
1736			chunk_sizes_updated = true;
1737		} else
1738			goto cchunk_out;
1739	}
1740
1741cchunk_out:
1742	kfree(pcchunk);
1743	kfree(retbuf);
1744	if (rc)
1745		return rc;
1746	else
1747		return total_bytes_written;
1748}
1749
1750static int
1751smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1752		struct cifs_fid *fid)
1753{
1754	return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1755}
1756
1757static unsigned int
1758smb2_read_data_offset(char *buf)
1759{
1760	struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1761
1762	return rsp->DataOffset;
1763}
1764
1765static unsigned int
1766smb2_read_data_length(char *buf, bool in_remaining)
1767{
1768	struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1769
1770	if (in_remaining)
1771		return le32_to_cpu(rsp->DataRemaining);
1772
1773	return le32_to_cpu(rsp->DataLength);
1774}
1775
1776
1777static int
1778smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1779	       struct cifs_io_parms *parms, unsigned int *bytes_read,
1780	       char **buf, int *buf_type)
1781{
1782	parms->persistent_fid = pfid->persistent_fid;
1783	parms->volatile_fid = pfid->volatile_fid;
1784	return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1785}
1786
1787static int
1788smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1789		struct cifs_io_parms *parms, unsigned int *written,
1790		struct kvec *iov, unsigned long nr_segs)
1791{
1792
1793	parms->persistent_fid = pfid->persistent_fid;
1794	parms->volatile_fid = pfid->volatile_fid;
1795	return SMB2_write(xid, parms, written, iov, nr_segs);
1796}
1797
1798/* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1799static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1800		struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1801{
1802	struct cifsInodeInfo *cifsi;
1803	int rc;
1804
1805	cifsi = CIFS_I(inode);
1806
1807	/* if file already sparse don't bother setting sparse again */
1808	if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1809		return true; /* already sparse */
1810
1811	if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1812		return true; /* already not sparse */
1813
1814	/*
1815	 * Can't check for sparse support on share the usual way via the
1816	 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1817	 * since Samba server doesn't set the flag on the share, yet
1818	 * supports the set sparse FSCTL and returns sparse correctly
1819	 * in the file attributes. If we fail setting sparse though we
1820	 * mark that server does not support sparse files for this share
1821	 * to avoid repeatedly sending the unsupported fsctl to server
1822	 * if the file is repeatedly extended.
1823	 */
1824	if (tcon->broken_sparse_sup)
1825		return false;
1826
1827	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1828			cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 
1829			&setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1830	if (rc) {
1831		tcon->broken_sparse_sup = true;
1832		cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1833		return false;
1834	}
1835
1836	if (setsparse)
1837		cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1838	else
1839		cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1840
1841	return true;
1842}
1843
1844static int
1845smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1846		   struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1847{
1848	__le64 eof = cpu_to_le64(size);
1849	struct inode *inode;
1850
1851	/*
1852	 * If extending file more than one page make sparse. Many Linux fs
1853	 * make files sparse by default when extending via ftruncate
1854	 */
1855	inode = d_inode(cfile->dentry);
1856
1857	if (!set_alloc && (size > inode->i_size + 8192)) {
1858		__u8 set_sparse = 1;
1859
1860		/* whether set sparse succeeds or not, extend the file */
1861		smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1862	}
1863
1864	return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1865			    cfile->fid.volatile_fid, cfile->pid, &eof);
1866}
1867
1868static int
1869smb2_duplicate_extents(const unsigned int xid,
1870			struct cifsFileInfo *srcfile,
1871			struct cifsFileInfo *trgtfile, u64 src_off,
1872			u64 len, u64 dest_off)
1873{
1874	int rc;
1875	unsigned int ret_data_len;
1876	struct inode *inode;
1877	struct duplicate_extents_to_file dup_ext_buf;
1878	struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1879
1880	/* server fileays advertise duplicate extent support with this flag */
1881	if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1882	     FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1883		return -EOPNOTSUPP;
1884
1885	dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1886	dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1887	dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1888	dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1889	dup_ext_buf.ByteCount = cpu_to_le64(len);
1890	cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1891		src_off, dest_off, len);
1892
1893	inode = d_inode(trgtfile->dentry);
1894	if (inode->i_size < dest_off + len) {
1895		rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1896		if (rc)
1897			goto duplicate_extents_out;
1898
1899		/*
1900		 * Although also could set plausible allocation size (i_blocks)
1901		 * here in addition to setting the file size, in reflink
1902		 * it is likely that the target file is sparse. Its allocation
1903		 * size will be queried on next revalidate, but it is important
1904		 * to make sure that file's cached size is updated immediately
1905		 */
1906		cifs_setsize(inode, dest_off + len);
1907	}
1908	rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1909			trgtfile->fid.volatile_fid,
1910			FSCTL_DUPLICATE_EXTENTS_TO_FILE,
 
1911			(char *)&dup_ext_buf,
1912			sizeof(struct duplicate_extents_to_file),
1913			CIFSMaxBufSize, NULL,
1914			&ret_data_len);
1915
1916	if (ret_data_len > 0)
1917		cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1918
1919duplicate_extents_out:
1920	return rc;
1921}
1922
1923static int
1924smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1925		   struct cifsFileInfo *cfile)
1926{
1927	return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1928			    cfile->fid.volatile_fid);
1929}
1930
1931static int
1932smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1933		   struct cifsFileInfo *cfile)
1934{
1935	struct fsctl_set_integrity_information_req integr_info;
1936	unsigned int ret_data_len;
1937
1938	integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1939	integr_info.Flags = 0;
1940	integr_info.Reserved = 0;
1941
1942	return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1943			cfile->fid.volatile_fid,
1944			FSCTL_SET_INTEGRITY_INFORMATION,
 
1945			(char *)&integr_info,
1946			sizeof(struct fsctl_set_integrity_information_req),
1947			CIFSMaxBufSize, NULL,
1948			&ret_data_len);
1949
1950}
1951
1952/* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1953#define GMT_TOKEN_SIZE 50
1954
1955#define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1956
1957/*
1958 * Input buffer contains (empty) struct smb_snapshot array with size filled in
1959 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1960 */
1961static int
1962smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1963		   struct cifsFileInfo *cfile, void __user *ioc_buf)
1964{
1965	char *retbuf = NULL;
1966	unsigned int ret_data_len = 0;
1967	int rc;
1968	u32 max_response_size;
1969	struct smb_snapshot_array snapshot_in;
1970
1971	/*
1972	 * On the first query to enumerate the list of snapshots available
1973	 * for this volume the buffer begins with 0 (number of snapshots
1974	 * which can be returned is zero since at that point we do not know
1975	 * how big the buffer needs to be). On the second query,
1976	 * it (ret_data_len) is set to number of snapshots so we can
1977	 * know to set the maximum response size larger (see below).
1978	 */
1979	if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
1980		return -EFAULT;
1981
1982	/*
1983	 * Note that for snapshot queries that servers like Azure expect that
1984	 * the first query be minimal size (and just used to get the number/size
1985	 * of previous versions) so response size must be specified as EXACTLY
1986	 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
1987	 * of eight bytes.
1988	 */
1989	if (ret_data_len == 0)
1990		max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
1991	else
1992		max_response_size = CIFSMaxBufSize;
1993
1994	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1995			cfile->fid.volatile_fid,
1996			FSCTL_SRV_ENUMERATE_SNAPSHOTS,
 
1997			NULL, 0 /* no input data */, max_response_size,
1998			(char **)&retbuf,
1999			&ret_data_len);
2000	cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2001			rc, ret_data_len);
2002	if (rc)
2003		return rc;
2004
2005	if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2006		/* Fixup buffer */
2007		if (copy_from_user(&snapshot_in, ioc_buf,
2008		    sizeof(struct smb_snapshot_array))) {
2009			rc = -EFAULT;
2010			kfree(retbuf);
2011			return rc;
2012		}
2013
2014		/*
2015		 * Check for min size, ie not large enough to fit even one GMT
2016		 * token (snapshot).  On the first ioctl some users may pass in
2017		 * smaller size (or zero) to simply get the size of the array
2018		 * so the user space caller can allocate sufficient memory
2019		 * and retry the ioctl again with larger array size sufficient
2020		 * to hold all of the snapshot GMT tokens on the second try.
2021		 */
2022		if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2023			ret_data_len = sizeof(struct smb_snapshot_array);
2024
2025		/*
2026		 * We return struct SRV_SNAPSHOT_ARRAY, followed by
2027		 * the snapshot array (of 50 byte GMT tokens) each
2028		 * representing an available previous version of the data
2029		 */
2030		if (ret_data_len > (snapshot_in.snapshot_array_size +
2031					sizeof(struct smb_snapshot_array)))
2032			ret_data_len = snapshot_in.snapshot_array_size +
2033					sizeof(struct smb_snapshot_array);
2034
2035		if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2036			rc = -EFAULT;
2037	}
2038
2039	kfree(retbuf);
2040	return rc;
2041}
2042
2043
2044
2045static int
2046smb3_notify(const unsigned int xid, struct file *pfile,
2047	    void __user *ioc_buf, bool return_changes)
2048{
2049	struct smb3_notify_info notify;
2050	struct smb3_notify_info __user *pnotify_buf;
2051	struct dentry *dentry = pfile->f_path.dentry;
2052	struct inode *inode = file_inode(pfile);
2053	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2054	struct cifs_open_parms oparms;
2055	struct cifs_fid fid;
2056	struct cifs_tcon *tcon;
2057	const unsigned char *path;
2058	char *returned_ioctl_info = NULL;
2059	void *page = alloc_dentry_path();
2060	__le16 *utf16_path = NULL;
2061	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2062	int rc = 0;
2063	__u32 ret_len = 0;
2064
2065	path = build_path_from_dentry(dentry, page);
2066	if (IS_ERR(path)) {
2067		rc = PTR_ERR(path);
2068		goto notify_exit;
2069	}
2070
2071	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2072	if (utf16_path == NULL) {
2073		rc = -ENOMEM;
2074		goto notify_exit;
2075	}
2076
2077	if (return_changes) {
2078		if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2079			rc = -EFAULT;
2080			goto notify_exit;
2081		}
2082	} else {
2083		if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2084			rc = -EFAULT;
2085			goto notify_exit;
2086		}
2087		notify.data_len = 0;
2088	}
2089
2090	tcon = cifs_sb_master_tcon(cifs_sb);
2091	oparms.tcon = tcon;
2092	oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2093	oparms.disposition = FILE_OPEN;
2094	oparms.create_options = cifs_create_options(cifs_sb, 0);
2095	oparms.fid = &fid;
2096	oparms.reconnect = false;
2097
2098	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2099		       NULL);
2100	if (rc)
2101		goto notify_exit;
2102
2103	rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2104				notify.watch_tree, notify.completion_filter,
2105				notify.data_len, &returned_ioctl_info, &ret_len);
2106
2107	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2108
2109	cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2110	if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2111		if (ret_len > notify.data_len)
2112			ret_len = notify.data_len;
2113		pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2114		if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2115			rc = -EFAULT;
2116		else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2117			rc = -EFAULT;
2118	}
2119	kfree(returned_ioctl_info);
2120notify_exit:
2121	free_dentry_path(page);
2122	kfree(utf16_path);
2123	return rc;
2124}
2125
2126static int
2127smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2128		     const char *path, struct cifs_sb_info *cifs_sb,
2129		     struct cifs_fid *fid, __u16 search_flags,
2130		     struct cifs_search_info *srch_inf)
2131{
2132	__le16 *utf16_path;
2133	struct smb_rqst rqst[2];
2134	struct kvec rsp_iov[2];
2135	int resp_buftype[2];
2136	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2137	struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2138	int rc, flags = 0;
2139	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2140	struct cifs_open_parms oparms;
2141	struct smb2_query_directory_rsp *qd_rsp = NULL;
2142	struct smb2_create_rsp *op_rsp = NULL;
2143	struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2144	int retry_count = 0;
2145
2146	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2147	if (!utf16_path)
2148		return -ENOMEM;
2149
2150	if (smb3_encryption_required(tcon))
2151		flags |= CIFS_TRANSFORM_REQ;
2152
2153	memset(rqst, 0, sizeof(rqst));
2154	resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2155	memset(rsp_iov, 0, sizeof(rsp_iov));
2156
2157	/* Open */
2158	memset(&open_iov, 0, sizeof(open_iov));
2159	rqst[0].rq_iov = open_iov;
2160	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2161
2162	oparms.tcon = tcon;
2163	oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2164	oparms.disposition = FILE_OPEN;
2165	oparms.create_options = cifs_create_options(cifs_sb, 0);
 
 
 
2166	oparms.fid = fid;
2167	oparms.reconnect = false;
2168
2169	rc = SMB2_open_init(tcon, server,
2170			    &rqst[0], &oplock, &oparms, utf16_path);
2171	if (rc)
2172		goto qdf_free;
2173	smb2_set_next_command(tcon, &rqst[0]);
 
2174
2175	/* Query directory */
2176	srch_inf->entries_in_buffer = 0;
2177	srch_inf->index_of_last_entry = 2;
2178
2179	memset(&qd_iov, 0, sizeof(qd_iov));
2180	rqst[1].rq_iov = qd_iov;
2181	rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2182
2183	rc = SMB2_query_directory_init(xid, tcon, server,
2184				       &rqst[1],
2185				       COMPOUND_FID, COMPOUND_FID,
2186				       0, srch_inf->info_level);
2187	if (rc)
2188		goto qdf_free;
2189
2190	smb2_set_related(&rqst[1]);
2191
2192again:
2193	rc = compound_send_recv(xid, tcon->ses, server,
2194				flags, 2, rqst,
2195				resp_buftype, rsp_iov);
2196
2197	if (rc == -EAGAIN && retry_count++ < 10)
2198		goto again;
2199
2200	/* If the open failed there is nothing to do */
2201	op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2202	if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2203		cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2204		goto qdf_free;
2205	}
2206	fid->persistent_fid = op_rsp->PersistentFileId;
2207	fid->volatile_fid = op_rsp->VolatileFileId;
2208
2209	/* Anything else than ENODATA means a genuine error */
2210	if (rc && rc != -ENODATA) {
2211		SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2212		cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2213		trace_smb3_query_dir_err(xid, fid->persistent_fid,
2214					 tcon->tid, tcon->ses->Suid, 0, 0, rc);
2215		goto qdf_free;
2216	}
2217
2218	atomic_inc(&tcon->num_remote_opens);
2219
2220	qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2221	if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2222		trace_smb3_query_dir_done(xid, fid->persistent_fid,
2223					  tcon->tid, tcon->ses->Suid, 0, 0);
2224		srch_inf->endOfSearch = true;
2225		rc = 0;
2226		goto qdf_free;
2227	}
2228
2229	rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2230					srch_inf);
2231	if (rc) {
2232		trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2233			tcon->ses->Suid, 0, 0, rc);
2234		goto qdf_free;
2235	}
2236	resp_buftype[1] = CIFS_NO_BUFFER;
2237
2238	trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2239			tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2240
2241 qdf_free:
2242	kfree(utf16_path);
2243	SMB2_open_free(&rqst[0]);
2244	SMB2_query_directory_free(&rqst[1]);
2245	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2246	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2247	return rc;
2248}
2249
2250static int
2251smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2252		    struct cifs_fid *fid, __u16 search_flags,
2253		    struct cifs_search_info *srch_inf)
2254{
2255	return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2256				    fid->volatile_fid, 0, srch_inf);
2257}
2258
2259static int
2260smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2261	       struct cifs_fid *fid)
2262{
2263	return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2264}
2265
2266/*
2267 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2268 * the number of credits and return true. Otherwise - return false.
2269 */
2270static bool
2271smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2272{
2273	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2274	int scredits, in_flight;
2275
2276	if (shdr->Status != STATUS_PENDING)
2277		return false;
2278
2279	if (shdr->CreditRequest) {
2280		spin_lock(&server->req_lock);
2281		server->credits += le16_to_cpu(shdr->CreditRequest);
2282		scredits = server->credits;
2283		in_flight = server->in_flight;
2284		spin_unlock(&server->req_lock);
2285		wake_up(&server->request_q);
2286
2287		trace_smb3_pend_credits(server->CurrentMid,
2288				server->conn_id, server->hostname, scredits,
2289				le16_to_cpu(shdr->CreditRequest), in_flight);
2290		cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2291				__func__, le16_to_cpu(shdr->CreditRequest), scredits);
2292	}
2293
2294	return true;
2295}
2296
2297static bool
2298smb2_is_session_expired(char *buf)
2299{
2300	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2301
2302	if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2303	    shdr->Status != STATUS_USER_SESSION_DELETED)
2304		return false;
2305
2306	trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2307			       le64_to_cpu(shdr->SessionId),
2308			       le16_to_cpu(shdr->Command),
2309			       le64_to_cpu(shdr->MessageId));
2310	cifs_dbg(FYI, "Session expired or deleted\n");
2311
2312	return true;
2313}
2314
2315static bool
2316smb2_is_status_io_timeout(char *buf)
2317{
2318	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2319
2320	if (shdr->Status == STATUS_IO_TIMEOUT)
2321		return true;
2322	else
2323		return false;
2324}
2325
2326static void
2327smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2328{
2329	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2330	struct TCP_Server_Info *pserver;
2331	struct cifs_ses *ses;
2332	struct cifs_tcon *tcon;
2333
2334	if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2335		return;
2336
2337	/* If server is a channel, select the primary channel */
2338	pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
2339
2340	spin_lock(&cifs_tcp_ses_lock);
2341	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2342		list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2343			if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2344				spin_lock(&tcon->tc_lock);
2345				tcon->need_reconnect = true;
2346				spin_unlock(&tcon->tc_lock);
2347				spin_unlock(&cifs_tcp_ses_lock);
2348				pr_warn_once("Server share %s deleted.\n",
2349					     tcon->tree_name);
2350				return;
2351			}
2352		}
2353	}
2354	spin_unlock(&cifs_tcp_ses_lock);
2355}
2356
2357static int
2358smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2359		     struct cifsInodeInfo *cinode)
2360{
2361	if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2362		return SMB2_lease_break(0, tcon, cinode->lease_key,
2363					smb2_get_lease_state(cinode));
2364
2365	return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2366				 fid->volatile_fid,
2367				 CIFS_CACHE_READ(cinode) ? 1 : 0);
2368}
2369
2370void
2371smb2_set_related(struct smb_rqst *rqst)
2372{
2373	struct smb2_hdr *shdr;
2374
2375	shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2376	if (shdr == NULL) {
2377		cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2378		return;
2379	}
2380	shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2381}
2382
2383char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2384
2385void
2386smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2387{
2388	struct smb2_hdr *shdr;
2389	struct cifs_ses *ses = tcon->ses;
2390	struct TCP_Server_Info *server = ses->server;
2391	unsigned long len = smb_rqst_len(server, rqst);
2392	int i, num_padding;
2393
2394	shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2395	if (shdr == NULL) {
2396		cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2397		return;
2398	}
2399
2400	/* SMB headers in a compound are 8 byte aligned. */
2401
2402	/* No padding needed */
2403	if (!(len & 7))
2404		goto finished;
2405
2406	num_padding = 8 - (len & 7);
2407	if (!smb3_encryption_required(tcon)) {
2408		/*
2409		 * If we do not have encryption then we can just add an extra
2410		 * iov for the padding.
2411		 */
2412		rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2413		rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2414		rqst->rq_nvec++;
2415		len += num_padding;
2416	} else {
2417		/*
2418		 * We can not add a small padding iov for the encryption case
2419		 * because the encryption framework can not handle the padding
2420		 * iovs.
2421		 * We have to flatten this into a single buffer and add
2422		 * the padding to it.
2423		 */
2424		for (i = 1; i < rqst->rq_nvec; i++) {
2425			memcpy(rqst->rq_iov[0].iov_base +
2426			       rqst->rq_iov[0].iov_len,
2427			       rqst->rq_iov[i].iov_base,
2428			       rqst->rq_iov[i].iov_len);
2429			rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2430		}
2431		memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2432		       0, num_padding);
2433		rqst->rq_iov[0].iov_len += num_padding;
2434		len += num_padding;
2435		rqst->rq_nvec = 1;
2436	}
2437
2438 finished:
2439	shdr->NextCommand = cpu_to_le32(len);
2440}
2441
2442/*
2443 * Passes the query info response back to the caller on success.
2444 * Caller need to free this with free_rsp_buf().
2445 */
2446int
2447smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2448			 const char *path, u32 desired_access,
2449			 u32 class, u32 type, u32 output_len,
2450			 struct kvec *rsp, int *buftype,
2451			 struct cifs_sb_info *cifs_sb)
2452{
2453	struct cifs_ses *ses = tcon->ses;
2454	struct TCP_Server_Info *server = cifs_pick_channel(ses);
2455	int flags = CIFS_CP_CREATE_CLOSE_OP;
2456	struct smb_rqst rqst[3];
2457	int resp_buftype[3];
2458	struct kvec rsp_iov[3];
2459	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2460	struct kvec qi_iov[1];
2461	struct kvec close_iov[1];
2462	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2463	struct cifs_open_parms oparms;
2464	struct cifs_fid fid;
2465	int rc;
2466	__le16 *utf16_path;
2467	struct cached_fid *cfid = NULL;
2468
2469	if (!path)
2470		path = "";
2471	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2472	if (!utf16_path)
2473		return -ENOMEM;
2474
2475	if (smb3_encryption_required(tcon))
2476		flags |= CIFS_TRANSFORM_REQ;
2477
2478	memset(rqst, 0, sizeof(rqst));
2479	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2480	memset(rsp_iov, 0, sizeof(rsp_iov));
2481
2482	/*
2483	 * We can only call this for things we know are directories.
2484	 */
2485	if (!strcmp(path, ""))
2486		open_cached_dir(xid, tcon, path, cifs_sb, false,
2487				&cfid); /* cfid null if open dir failed */
2488
2489	memset(&open_iov, 0, sizeof(open_iov));
2490	rqst[0].rq_iov = open_iov;
2491	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2492
2493	oparms.tcon = tcon;
2494	oparms.desired_access = desired_access;
2495	oparms.disposition = FILE_OPEN;
2496	oparms.create_options = cifs_create_options(cifs_sb, 0);
 
 
 
2497	oparms.fid = &fid;
2498	oparms.reconnect = false;
2499
2500	rc = SMB2_open_init(tcon, server,
2501			    &rqst[0], &oplock, &oparms, utf16_path);
2502	if (rc)
2503		goto qic_exit;
2504	smb2_set_next_command(tcon, &rqst[0]);
2505
2506	memset(&qi_iov, 0, sizeof(qi_iov));
2507	rqst[1].rq_iov = qi_iov;
2508	rqst[1].rq_nvec = 1;
2509
2510	if (cfid) {
2511		rc = SMB2_query_info_init(tcon, server,
2512					  &rqst[1],
2513					  cfid->fid.persistent_fid,
2514					  cfid->fid.volatile_fid,
2515					  class, type, 0,
2516					  output_len, 0,
2517					  NULL);
2518	} else {
2519		rc = SMB2_query_info_init(tcon, server,
2520					  &rqst[1],
2521					  COMPOUND_FID,
2522					  COMPOUND_FID,
2523					  class, type, 0,
2524					  output_len, 0,
2525					  NULL);
2526	}
2527	if (rc)
2528		goto qic_exit;
2529	if (!cfid) {
2530		smb2_set_next_command(tcon, &rqst[1]);
2531		smb2_set_related(&rqst[1]);
2532	}
2533
2534	memset(&close_iov, 0, sizeof(close_iov));
2535	rqst[2].rq_iov = close_iov;
2536	rqst[2].rq_nvec = 1;
2537
2538	rc = SMB2_close_init(tcon, server,
2539			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2540	if (rc)
2541		goto qic_exit;
2542	smb2_set_related(&rqst[2]);
2543
2544	if (cfid) {
2545		rc = compound_send_recv(xid, ses, server,
2546					flags, 1, &rqst[1],
2547					&resp_buftype[1], &rsp_iov[1]);
2548	} else {
2549		rc = compound_send_recv(xid, ses, server,
2550					flags, 3, rqst,
2551					resp_buftype, rsp_iov);
2552	}
2553	if (rc) {
2554		free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2555		if (rc == -EREMCHG) {
2556			tcon->need_reconnect = true;
2557			pr_warn_once("server share %s deleted\n",
2558				     tcon->tree_name);
2559		}
2560		goto qic_exit;
2561	}
2562	*rsp = rsp_iov[1];
2563	*buftype = resp_buftype[1];
2564
2565 qic_exit:
2566	kfree(utf16_path);
2567	SMB2_open_free(&rqst[0]);
2568	SMB2_query_info_free(&rqst[1]);
2569	SMB2_close_free(&rqst[2]);
2570	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2571	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2572	if (cfid)
2573		close_cached_dir(cfid);
2574	return rc;
2575}
2576
2577static int
2578smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2579	     struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2580{
2581	struct smb2_query_info_rsp *rsp;
2582	struct smb2_fs_full_size_info *info = NULL;
 
2583	struct kvec rsp_iov = {NULL, 0};
2584	int buftype = CIFS_NO_BUFFER;
2585	int rc;
2586
2587
2588	rc = smb2_query_info_compound(xid, tcon, "",
2589				      FILE_READ_ATTRIBUTES,
2590				      FS_FULL_SIZE_INFORMATION,
2591				      SMB2_O_INFO_FILESYSTEM,
2592				      sizeof(struct smb2_fs_full_size_info),
2593				      &rsp_iov, &buftype, cifs_sb);
2594	if (rc)
2595		goto qfs_exit;
2596
2597	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2598	buf->f_type = SMB2_SUPER_MAGIC;
2599	info = (struct smb2_fs_full_size_info *)(
2600		le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2601	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2602			       le32_to_cpu(rsp->OutputBufferLength),
2603			       &rsp_iov,
2604			       sizeof(struct smb2_fs_full_size_info));
2605	if (!rc)
2606		smb2_copy_fs_info_to_kstatfs(info, buf);
2607
2608qfs_exit:
2609	free_rsp_buf(buftype, rsp_iov.iov_base);
2610	return rc;
2611}
2612
2613static int
2614smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2615	       struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2616{
2617	int rc;
2618	__le16 srch_path = 0; /* Null - open root of share */
2619	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2620	struct cifs_open_parms oparms;
2621	struct cifs_fid fid;
2622
2623	if (!tcon->posix_extensions)
2624		return smb2_queryfs(xid, tcon, cifs_sb, buf);
2625
2626	oparms.tcon = tcon;
2627	oparms.desired_access = FILE_READ_ATTRIBUTES;
2628	oparms.disposition = FILE_OPEN;
2629	oparms.create_options = cifs_create_options(cifs_sb, 0);
2630	oparms.fid = &fid;
2631	oparms.reconnect = false;
2632
2633	rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2634		       NULL, NULL);
2635	if (rc)
2636		return rc;
2637
2638	rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2639				   fid.volatile_fid, buf);
2640	buf->f_type = SMB2_SUPER_MAGIC;
2641	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2642	return rc;
2643}
2644
2645static bool
2646smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2647{
2648	return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2649	       ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2650}
2651
2652static int
2653smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2654	       __u64 length, __u32 type, int lock, int unlock, bool wait)
2655{
2656	if (unlock && !lock)
2657		type = SMB2_LOCKFLAG_UNLOCK;
2658	return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2659			 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2660			 current->tgid, length, offset, type, wait);
2661}
2662
2663static void
2664smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2665{
2666	memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2667}
2668
2669static void
2670smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2671{
2672	memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2673}
2674
2675static void
2676smb2_new_lease_key(struct cifs_fid *fid)
2677{
2678	generate_random_uuid(fid->lease_key);
2679}
2680
2681static int
2682smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2683		   const char *search_name,
2684		   struct dfs_info3_param **target_nodes,
2685		   unsigned int *num_of_nodes,
2686		   const struct nls_table *nls_codepage, int remap)
2687{
2688	int rc;
2689	__le16 *utf16_path = NULL;
2690	int utf16_path_len = 0;
2691	struct cifs_tcon *tcon;
2692	struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2693	struct get_dfs_referral_rsp *dfs_rsp = NULL;
2694	u32 dfs_req_size = 0, dfs_rsp_size = 0;
2695	int retry_count = 0;
2696
2697	cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2698
2699	/*
2700	 * Try to use the IPC tcon, otherwise just use any
2701	 */
2702	tcon = ses->tcon_ipc;
2703	if (tcon == NULL) {
2704		spin_lock(&cifs_tcp_ses_lock);
2705		tcon = list_first_entry_or_null(&ses->tcon_list,
2706						struct cifs_tcon,
2707						tcon_list);
2708		if (tcon)
2709			tcon->tc_count++;
2710		spin_unlock(&cifs_tcp_ses_lock);
2711	}
2712
2713	if (tcon == NULL) {
2714		cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2715			 ses);
2716		rc = -ENOTCONN;
2717		goto out;
2718	}
2719
2720	utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2721					   &utf16_path_len,
2722					   nls_codepage, remap);
2723	if (!utf16_path) {
2724		rc = -ENOMEM;
2725		goto out;
2726	}
2727
2728	dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2729	dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2730	if (!dfs_req) {
2731		rc = -ENOMEM;
2732		goto out;
2733	}
2734
2735	/* Highest DFS referral version understood */
2736	dfs_req->MaxReferralLevel = DFS_VERSION;
2737
2738	/* Path to resolve in an UTF-16 null-terminated string */
2739	memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2740
2741	do {
2742		rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2743				FSCTL_DFS_GET_REFERRALS,
 
2744				(char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2745				(char **)&dfs_rsp, &dfs_rsp_size);
2746		if (!is_retryable_error(rc))
2747			break;
2748		usleep_range(512, 2048);
2749	} while (++retry_count < 5);
2750
2751	if (rc) {
2752		if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2753			cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2754		goto out;
2755	}
2756
2757	rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2758				 num_of_nodes, target_nodes,
2759				 nls_codepage, remap, search_name,
2760				 true /* is_unicode */);
2761	if (rc) {
2762		cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2763		goto out;
2764	}
2765
2766 out:
2767	if (tcon && !tcon->ipc) {
2768		/* ipc tcons are not refcounted */
2769		spin_lock(&cifs_tcp_ses_lock);
2770		tcon->tc_count--;
2771		/* tc_count can never go negative */
2772		WARN_ON(tcon->tc_count < 0);
2773		spin_unlock(&cifs_tcp_ses_lock);
2774	}
2775	kfree(utf16_path);
2776	kfree(dfs_req);
2777	kfree(dfs_rsp);
2778	return rc;
2779}
2780
2781static int
2782parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2783		      u32 plen, char **target_path,
2784		      struct cifs_sb_info *cifs_sb)
2785{
2786	unsigned int len;
2787
2788	/* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2789	len = le16_to_cpu(symlink_buf->ReparseDataLength);
2790
2791	if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2792		cifs_dbg(VFS, "%lld not a supported symlink type\n",
2793			le64_to_cpu(symlink_buf->InodeType));
2794		return -EOPNOTSUPP;
2795	}
2796
2797	*target_path = cifs_strndup_from_utf16(
2798				symlink_buf->PathBuffer,
2799				len, true, cifs_sb->local_nls);
2800	if (!(*target_path))
2801		return -ENOMEM;
2802
2803	convert_delimiter(*target_path, '/');
2804	cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2805
2806	return 0;
2807}
2808
2809static int
2810parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2811		      u32 plen, char **target_path,
2812		      struct cifs_sb_info *cifs_sb)
2813{
2814	unsigned int sub_len;
2815	unsigned int sub_offset;
2816
2817	/* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2818
2819	sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2820	sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2821	if (sub_offset + 20 > plen ||
2822	    sub_offset + sub_len + 20 > plen) {
2823		cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2824		return -EIO;
2825	}
2826
2827	*target_path = cifs_strndup_from_utf16(
2828				symlink_buf->PathBuffer + sub_offset,
2829				sub_len, true, cifs_sb->local_nls);
2830	if (!(*target_path))
2831		return -ENOMEM;
2832
2833	convert_delimiter(*target_path, '/');
2834	cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2835
2836	return 0;
2837}
2838
2839static int
2840parse_reparse_point(struct reparse_data_buffer *buf,
2841		    u32 plen, char **target_path,
2842		    struct cifs_sb_info *cifs_sb)
2843{
2844	if (plen < sizeof(struct reparse_data_buffer)) {
2845		cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2846			 plen);
2847		return -EIO;
2848	}
2849
2850	if (plen < le16_to_cpu(buf->ReparseDataLength) +
2851	    sizeof(struct reparse_data_buffer)) {
2852		cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2853			 plen);
2854		return -EIO;
2855	}
2856
2857	/* See MS-FSCC 2.1.2 */
2858	switch (le32_to_cpu(buf->ReparseTag)) {
2859	case IO_REPARSE_TAG_NFS:
2860		return parse_reparse_posix(
2861			(struct reparse_posix_data *)buf,
2862			plen, target_path, cifs_sb);
2863	case IO_REPARSE_TAG_SYMLINK:
2864		return parse_reparse_symlink(
2865			(struct reparse_symlink_data_buffer *)buf,
2866			plen, target_path, cifs_sb);
2867	default:
2868		cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2869			 le32_to_cpu(buf->ReparseTag));
2870		return -EOPNOTSUPP;
2871	}
2872}
2873
 
 
 
2874static int
2875smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2876		   struct cifs_sb_info *cifs_sb, const char *full_path,
2877		   char **target_path, bool is_reparse_point)
2878{
2879	int rc;
2880	__le16 *utf16_path = NULL;
2881	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2882	struct cifs_open_parms oparms;
2883	struct cifs_fid fid;
2884	struct kvec err_iov = {NULL, 0};
2885	struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2886	int flags = CIFS_CP_CREATE_CLOSE_OP;
 
 
 
 
 
2887	struct smb_rqst rqst[3];
2888	int resp_buftype[3];
2889	struct kvec rsp_iov[3];
2890	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2891	struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2892	struct kvec close_iov[1];
2893	struct smb2_create_rsp *create_rsp;
2894	struct smb2_ioctl_rsp *ioctl_rsp;
2895	struct reparse_data_buffer *reparse_buf;
2896	int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
2897	u32 plen;
2898
2899	cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2900
2901	*target_path = NULL;
2902
2903	if (smb3_encryption_required(tcon))
2904		flags |= CIFS_TRANSFORM_REQ;
2905
2906	memset(rqst, 0, sizeof(rqst));
2907	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2908	memset(rsp_iov, 0, sizeof(rsp_iov));
2909
2910	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2911	if (!utf16_path)
2912		return -ENOMEM;
2913
2914	/* Open */
2915	memset(&open_iov, 0, sizeof(open_iov));
2916	rqst[0].rq_iov = open_iov;
2917	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2918
2919	memset(&oparms, 0, sizeof(oparms));
2920	oparms.tcon = tcon;
2921	oparms.desired_access = FILE_READ_ATTRIBUTES;
2922	oparms.disposition = FILE_OPEN;
2923	oparms.create_options = cifs_create_options(cifs_sb, create_options);
 
 
 
 
 
 
 
2924	oparms.fid = &fid;
2925	oparms.reconnect = false;
2926
2927	rc = SMB2_open_init(tcon, server,
2928			    &rqst[0], &oplock, &oparms, utf16_path);
2929	if (rc)
2930		goto querty_exit;
2931	smb2_set_next_command(tcon, &rqst[0]);
2932
2933
2934	/* IOCTL */
2935	memset(&io_iov, 0, sizeof(io_iov));
2936	rqst[1].rq_iov = io_iov;
2937	rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2938
2939	rc = SMB2_ioctl_init(tcon, server,
2940			     &rqst[1], fid.persistent_fid,
2941			     fid.volatile_fid, FSCTL_GET_REPARSE_POINT, NULL, 0,
2942			     CIFSMaxBufSize -
2943			     MAX_SMB2_CREATE_RESPONSE_SIZE -
2944			     MAX_SMB2_CLOSE_RESPONSE_SIZE);
2945	if (rc)
2946		goto querty_exit;
2947
2948	smb2_set_next_command(tcon, &rqst[1]);
2949	smb2_set_related(&rqst[1]);
2950
2951
2952	/* Close */
2953	memset(&close_iov, 0, sizeof(close_iov));
2954	rqst[2].rq_iov = close_iov;
2955	rqst[2].rq_nvec = 1;
2956
2957	rc = SMB2_close_init(tcon, server,
2958			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2959	if (rc)
2960		goto querty_exit;
2961
2962	smb2_set_related(&rqst[2]);
2963
2964	rc = compound_send_recv(xid, tcon->ses, server,
2965				flags, 3, rqst,
2966				resp_buftype, rsp_iov);
2967
2968	create_rsp = rsp_iov[0].iov_base;
2969	if (create_rsp && create_rsp->hdr.Status)
2970		err_iov = rsp_iov[0];
2971	ioctl_rsp = rsp_iov[1].iov_base;
2972
2973	/*
2974	 * Open was successful and we got an ioctl response.
2975	 */
2976	if ((rc == 0) && (is_reparse_point)) {
2977		/* See MS-FSCC 2.3.23 */
2978
2979		reparse_buf = (struct reparse_data_buffer *)
2980			((char *)ioctl_rsp +
2981			 le32_to_cpu(ioctl_rsp->OutputOffset));
2982		plen = le32_to_cpu(ioctl_rsp->OutputCount);
2983
2984		if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
2985		    rsp_iov[1].iov_len) {
2986			cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
2987				 plen);
2988			rc = -EIO;
2989			goto querty_exit;
2990		}
2991
2992		rc = parse_reparse_point(reparse_buf, plen, target_path,
2993					 cifs_sb);
2994		goto querty_exit;
2995	}
2996
2997	if (!rc || !err_iov.iov_base) {
2998		rc = -ENOENT;
2999		goto querty_exit;
3000	}
3001
3002	rc = smb2_parse_symlink_response(cifs_sb, &err_iov, target_path);
3003
3004 querty_exit:
3005	cifs_dbg(FYI, "query symlink rc %d\n", rc);
3006	kfree(utf16_path);
3007	SMB2_open_free(&rqst[0]);
3008	SMB2_ioctl_free(&rqst[1]);
3009	SMB2_close_free(&rqst[2]);
3010	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3011	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3012	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3013	return rc;
3014}
3015
3016int
3017smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
3018		   struct cifs_sb_info *cifs_sb, const char *full_path,
3019		   __u32 *tag)
3020{
3021	int rc;
3022	__le16 *utf16_path = NULL;
3023	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3024	struct cifs_open_parms oparms;
3025	struct cifs_fid fid;
3026	struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3027	int flags = CIFS_CP_CREATE_CLOSE_OP;
3028	struct smb_rqst rqst[3];
3029	int resp_buftype[3];
3030	struct kvec rsp_iov[3];
3031	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3032	struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3033	struct kvec close_iov[1];
3034	struct smb2_ioctl_rsp *ioctl_rsp;
3035	struct reparse_data_buffer *reparse_buf;
3036	u32 plen;
3037
3038	cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3039
3040	if (smb3_encryption_required(tcon))
3041		flags |= CIFS_TRANSFORM_REQ;
3042
3043	memset(rqst, 0, sizeof(rqst));
3044	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3045	memset(rsp_iov, 0, sizeof(rsp_iov));
3046
3047	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3048	if (!utf16_path)
3049		return -ENOMEM;
3050
3051	/*
3052	 * setup smb2open - TODO add optimization to call cifs_get_readable_path
3053	 * to see if there is a handle already open that we can use
3054	 */
3055	memset(&open_iov, 0, sizeof(open_iov));
3056	rqst[0].rq_iov = open_iov;
3057	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3058
3059	memset(&oparms, 0, sizeof(oparms));
3060	oparms.tcon = tcon;
3061	oparms.desired_access = FILE_READ_ATTRIBUTES;
3062	oparms.disposition = FILE_OPEN;
3063	oparms.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT);
3064	oparms.fid = &fid;
3065	oparms.reconnect = false;
3066
3067	rc = SMB2_open_init(tcon, server,
3068			    &rqst[0], &oplock, &oparms, utf16_path);
3069	if (rc)
3070		goto query_rp_exit;
3071	smb2_set_next_command(tcon, &rqst[0]);
3072
3073
3074	/* IOCTL */
3075	memset(&io_iov, 0, sizeof(io_iov));
3076	rqst[1].rq_iov = io_iov;
3077	rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3078
3079	rc = SMB2_ioctl_init(tcon, server,
3080			     &rqst[1], COMPOUND_FID,
3081			     COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3082			     CIFSMaxBufSize -
3083			     MAX_SMB2_CREATE_RESPONSE_SIZE -
3084			     MAX_SMB2_CLOSE_RESPONSE_SIZE);
3085	if (rc)
3086		goto query_rp_exit;
3087
3088	smb2_set_next_command(tcon, &rqst[1]);
3089	smb2_set_related(&rqst[1]);
3090
3091
3092	/* Close */
3093	memset(&close_iov, 0, sizeof(close_iov));
3094	rqst[2].rq_iov = close_iov;
3095	rqst[2].rq_nvec = 1;
3096
3097	rc = SMB2_close_init(tcon, server,
3098			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3099	if (rc)
3100		goto query_rp_exit;
3101
3102	smb2_set_related(&rqst[2]);
3103
3104	rc = compound_send_recv(xid, tcon->ses, server,
3105				flags, 3, rqst,
3106				resp_buftype, rsp_iov);
 
 
 
3107
3108	ioctl_rsp = rsp_iov[1].iov_base;
 
 
 
 
 
3109
3110	/*
3111	 * Open was successful and we got an ioctl response.
3112	 */
3113	if (rc == 0) {
3114		/* See MS-FSCC 2.3.23 */
3115
3116		reparse_buf = (struct reparse_data_buffer *)
3117			((char *)ioctl_rsp +
3118			 le32_to_cpu(ioctl_rsp->OutputOffset));
3119		plen = le32_to_cpu(ioctl_rsp->OutputCount);
 
3120
3121		if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3122		    rsp_iov[1].iov_len) {
3123			cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3124				 plen);
3125			rc = -EIO;
3126			goto query_rp_exit;
3127		}
3128		*tag = le32_to_cpu(reparse_buf->ReparseTag);
3129	}
 
 
3130
3131 query_rp_exit:
 
3132	kfree(utf16_path);
3133	SMB2_open_free(&rqst[0]);
3134	SMB2_ioctl_free(&rqst[1]);
3135	SMB2_close_free(&rqst[2]);
3136	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3137	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3138	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3139	return rc;
3140}
3141
3142static struct cifs_ntsd *
3143get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3144		    const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3145{
3146	struct cifs_ntsd *pntsd = NULL;
3147	unsigned int xid;
3148	int rc = -EOPNOTSUPP;
3149	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3150
3151	if (IS_ERR(tlink))
3152		return ERR_CAST(tlink);
3153
3154	xid = get_xid();
3155	cifs_dbg(FYI, "trying to get acl\n");
3156
3157	rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3158			    cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3159			    info);
3160	free_xid(xid);
3161
3162	cifs_put_tlink(tlink);
3163
3164	cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3165	if (rc)
3166		return ERR_PTR(rc);
3167	return pntsd;
3168
3169}
3170
3171static struct cifs_ntsd *
3172get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3173		     const char *path, u32 *pacllen, u32 info)
3174{
3175	struct cifs_ntsd *pntsd = NULL;
3176	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3177	unsigned int xid;
3178	int rc;
3179	struct cifs_tcon *tcon;
3180	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3181	struct cifs_fid fid;
3182	struct cifs_open_parms oparms;
3183	__le16 *utf16_path;
3184
3185	cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3186	if (IS_ERR(tlink))
3187		return ERR_CAST(tlink);
3188
3189	tcon = tlink_tcon(tlink);
3190	xid = get_xid();
3191
 
 
 
 
 
3192	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3193	if (!utf16_path) {
3194		rc = -ENOMEM;
3195		free_xid(xid);
3196		return ERR_PTR(rc);
3197	}
3198
3199	oparms.tcon = tcon;
3200	oparms.desired_access = READ_CONTROL;
3201	oparms.disposition = FILE_OPEN;
3202	/*
3203	 * When querying an ACL, even if the file is a symlink we want to open
3204	 * the source not the target, and so the protocol requires that the
3205	 * client specify this flag when opening a reparse point
3206	 */
3207	oparms.create_options = cifs_create_options(cifs_sb, 0) | OPEN_REPARSE_POINT;
3208	oparms.fid = &fid;
3209	oparms.reconnect = false;
3210
3211	if (info & SACL_SECINFO)
3212		oparms.desired_access |= SYSTEM_SECURITY;
3213
3214	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3215		       NULL);
3216	kfree(utf16_path);
3217	if (!rc) {
3218		rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3219				    fid.volatile_fid, (void **)&pntsd, pacllen,
3220				    info);
3221		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3222	}
3223
3224	cifs_put_tlink(tlink);
3225	free_xid(xid);
3226
3227	cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3228	if (rc)
3229		return ERR_PTR(rc);
3230	return pntsd;
3231}
3232
3233static int
3234set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3235		struct inode *inode, const char *path, int aclflag)
3236{
3237	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3238	unsigned int xid;
3239	int rc, access_flags = 0;
3240	struct cifs_tcon *tcon;
3241	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3242	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3243	struct cifs_fid fid;
3244	struct cifs_open_parms oparms;
3245	__le16 *utf16_path;
3246
3247	cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3248	if (IS_ERR(tlink))
3249		return PTR_ERR(tlink);
3250
3251	tcon = tlink_tcon(tlink);
3252	xid = get_xid();
3253
3254	if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3255		access_flags |= WRITE_OWNER;
3256	if (aclflag & CIFS_ACL_SACL)
3257		access_flags |= SYSTEM_SECURITY;
3258	if (aclflag & CIFS_ACL_DACL)
3259		access_flags |= WRITE_DAC;
 
 
 
3260
3261	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3262	if (!utf16_path) {
3263		rc = -ENOMEM;
3264		free_xid(xid);
3265		return rc;
3266	}
3267
3268	oparms.tcon = tcon;
3269	oparms.desired_access = access_flags;
3270	oparms.create_options = cifs_create_options(cifs_sb, 0);
3271	oparms.disposition = FILE_OPEN;
3272	oparms.path = path;
3273	oparms.fid = &fid;
3274	oparms.reconnect = false;
3275
3276	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3277		       NULL, NULL);
3278	kfree(utf16_path);
3279	if (!rc) {
3280		rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3281			    fid.volatile_fid, pnntsd, acllen, aclflag);
3282		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3283	}
3284
3285	cifs_put_tlink(tlink);
3286	free_xid(xid);
3287	return rc;
3288}
3289
3290/* Retrieve an ACL from the server */
3291static struct cifs_ntsd *
3292get_smb2_acl(struct cifs_sb_info *cifs_sb,
3293	     struct inode *inode, const char *path,
3294	     u32 *pacllen, u32 info)
3295{
3296	struct cifs_ntsd *pntsd = NULL;
3297	struct cifsFileInfo *open_file = NULL;
3298
3299	if (inode && !(info & SACL_SECINFO))
3300		open_file = find_readable_file(CIFS_I(inode), true);
3301	if (!open_file || (info & SACL_SECINFO))
3302		return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3303
3304	pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3305	cifsFileInfo_put(open_file);
3306	return pntsd;
3307}
3308
3309static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3310			     loff_t offset, loff_t len, unsigned int xid)
3311{
3312	struct cifsFileInfo *cfile = file->private_data;
3313	struct file_zero_data_information fsctl_buf;
3314
3315	cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3316
3317	fsctl_buf.FileOffset = cpu_to_le64(offset);
3318	fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3319
3320	return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3321			  cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3322			  (char *)&fsctl_buf,
3323			  sizeof(struct file_zero_data_information),
3324			  0, NULL, NULL);
3325}
3326
3327static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3328			    loff_t offset, loff_t len, bool keep_size)
3329{
3330	struct cifs_ses *ses = tcon->ses;
3331	struct inode *inode = file_inode(file);
3332	struct cifsInodeInfo *cifsi = CIFS_I(inode);
3333	struct cifsFileInfo *cfile = file->private_data;
 
3334	long rc;
3335	unsigned int xid;
3336	__le64 eof;
3337
3338	xid = get_xid();
3339
 
 
 
3340	trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3341			      ses->Suid, offset, len);
3342
3343	inode_lock(inode);
3344	filemap_invalidate_lock(inode->i_mapping);
3345
3346	/*
3347	 * We zero the range through ioctl, so we need remove the page caches
3348	 * first, otherwise the data may be inconsistent with the server.
3349	 */
3350	truncate_pagecache_range(inode, offset, offset + len - 1);
3351
3352	/* if file not oplocked can't be sure whether asking to extend size */
3353	rc = -EOPNOTSUPP;
3354	if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3355		goto zero_range_exit;
 
 
 
 
 
3356
3357	rc = smb3_zero_data(file, tcon, offset, len, xid);
3358	if (rc < 0)
 
 
 
 
 
 
 
 
 
3359		goto zero_range_exit;
3360
3361	/*
3362	 * do we also need to change the size of the file?
3363	 */
3364	if (keep_size == false && i_size_read(inode) < offset + len) {
3365		eof = cpu_to_le64(offset + len);
3366		rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3367				  cfile->fid.volatile_fid, cfile->pid, &eof);
3368	}
3369
3370 zero_range_exit:
3371	filemap_invalidate_unlock(inode->i_mapping);
3372	inode_unlock(inode);
3373	free_xid(xid);
3374	if (rc)
3375		trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3376			      ses->Suid, offset, len, rc);
3377	else
3378		trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3379			      ses->Suid, offset, len);
3380	return rc;
3381}
3382
3383static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3384			    loff_t offset, loff_t len)
3385{
3386	struct inode *inode = file_inode(file);
3387	struct cifsFileInfo *cfile = file->private_data;
3388	struct file_zero_data_information fsctl_buf;
3389	long rc;
3390	unsigned int xid;
3391	__u8 set_sparse = 1;
3392
3393	xid = get_xid();
3394
3395	inode_lock(inode);
 
3396	/* Need to make file sparse, if not already, before freeing range. */
3397	/* Consider adding equivalent for compressed since it could also work */
3398	if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3399		rc = -EOPNOTSUPP;
3400		goto out;
 
3401	}
3402
3403	filemap_invalidate_lock(inode->i_mapping);
3404	/*
3405	 * We implement the punch hole through ioctl, so we need remove the page
3406	 * caches first, otherwise the data may be inconsistent with the server.
3407	 */
3408	truncate_pagecache_range(inode, offset, offset + len - 1);
3409
3410	cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3411
3412	fsctl_buf.FileOffset = cpu_to_le64(offset);
3413	fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3414
3415	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3416			cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3417			(char *)&fsctl_buf,
3418			sizeof(struct file_zero_data_information),
3419			CIFSMaxBufSize, NULL, NULL);
3420	filemap_invalidate_unlock(inode->i_mapping);
3421out:
3422	inode_unlock(inode);
3423	free_xid(xid);
3424	return rc;
3425}
3426
3427static int smb3_simple_fallocate_write_range(unsigned int xid,
3428					     struct cifs_tcon *tcon,
3429					     struct cifsFileInfo *cfile,
3430					     loff_t off, loff_t len,
3431					     char *buf)
3432{
3433	struct cifs_io_parms io_parms = {0};
3434	int nbytes;
3435	int rc = 0;
3436	struct kvec iov[2];
3437
3438	io_parms.netfid = cfile->fid.netfid;
3439	io_parms.pid = current->tgid;
3440	io_parms.tcon = tcon;
3441	io_parms.persistent_fid = cfile->fid.persistent_fid;
3442	io_parms.volatile_fid = cfile->fid.volatile_fid;
3443
3444	while (len) {
3445		io_parms.offset = off;
3446		io_parms.length = len;
3447		if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3448			io_parms.length = SMB2_MAX_BUFFER_SIZE;
3449		/* iov[0] is reserved for smb header */
3450		iov[1].iov_base = buf;
3451		iov[1].iov_len = io_parms.length;
3452		rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3453		if (rc)
3454			break;
3455		if (nbytes > len)
3456			return -EINVAL;
3457		buf += nbytes;
3458		off += nbytes;
3459		len -= nbytes;
3460	}
3461	return rc;
3462}
3463
3464static int smb3_simple_fallocate_range(unsigned int xid,
3465				       struct cifs_tcon *tcon,
3466				       struct cifsFileInfo *cfile,
3467				       loff_t off, loff_t len)
3468{
3469	struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3470	u32 out_data_len;
3471	char *buf = NULL;
3472	loff_t l;
3473	int rc;
3474
3475	in_data.file_offset = cpu_to_le64(off);
3476	in_data.length = cpu_to_le64(len);
3477	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3478			cfile->fid.volatile_fid,
3479			FSCTL_QUERY_ALLOCATED_RANGES,
3480			(char *)&in_data, sizeof(in_data),
3481			1024 * sizeof(struct file_allocated_range_buffer),
3482			(char **)&out_data, &out_data_len);
3483	if (rc)
3484		goto out;
3485
3486	buf = kzalloc(1024 * 1024, GFP_KERNEL);
3487	if (buf == NULL) {
3488		rc = -ENOMEM;
3489		goto out;
3490	}
3491
3492	tmp_data = out_data;
3493	while (len) {
3494		/*
3495		 * The rest of the region is unmapped so write it all.
3496		 */
3497		if (out_data_len == 0) {
3498			rc = smb3_simple_fallocate_write_range(xid, tcon,
3499					       cfile, off, len, buf);
3500			goto out;
3501		}
3502
3503		if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3504			rc = -EINVAL;
3505			goto out;
3506		}
3507
3508		if (off < le64_to_cpu(tmp_data->file_offset)) {
3509			/*
3510			 * We are at a hole. Write until the end of the region
3511			 * or until the next allocated data,
3512			 * whichever comes next.
3513			 */
3514			l = le64_to_cpu(tmp_data->file_offset) - off;
3515			if (len < l)
3516				l = len;
3517			rc = smb3_simple_fallocate_write_range(xid, tcon,
3518					       cfile, off, l, buf);
3519			if (rc)
3520				goto out;
3521			off = off + l;
3522			len = len - l;
3523			if (len == 0)
3524				goto out;
3525		}
3526		/*
3527		 * We are at a section of allocated data, just skip forward
3528		 * until the end of the data or the end of the region
3529		 * we are supposed to fallocate, whichever comes first.
3530		 */
3531		l = le64_to_cpu(tmp_data->length);
3532		if (len < l)
3533			l = len;
3534		off += l;
3535		len -= l;
3536
3537		tmp_data = &tmp_data[1];
3538		out_data_len -= sizeof(struct file_allocated_range_buffer);
3539	}
3540
3541 out:
3542	kfree(out_data);
3543	kfree(buf);
3544	return rc;
3545}
3546
3547
3548static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3549			    loff_t off, loff_t len, bool keep_size)
3550{
3551	struct inode *inode;
3552	struct cifsInodeInfo *cifsi;
3553	struct cifsFileInfo *cfile = file->private_data;
3554	long rc = -EOPNOTSUPP;
3555	unsigned int xid;
3556	__le64 eof;
3557
3558	xid = get_xid();
3559
3560	inode = d_inode(cfile->dentry);
3561	cifsi = CIFS_I(inode);
3562
3563	trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3564				tcon->ses->Suid, off, len);
3565	/* if file not oplocked can't be sure whether asking to extend size */
3566	if (!CIFS_CACHE_READ(cifsi))
3567		if (keep_size == false) {
3568			trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3569				tcon->tid, tcon->ses->Suid, off, len, rc);
3570			free_xid(xid);
3571			return rc;
3572		}
3573
3574	/*
3575	 * Extending the file
3576	 */
3577	if ((keep_size == false) && i_size_read(inode) < off + len) {
3578		rc = inode_newsize_ok(inode, off + len);
3579		if (rc)
3580			goto out;
3581
3582		if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3583			smb2_set_sparse(xid, tcon, cfile, inode, false);
3584
3585		eof = cpu_to_le64(off + len);
3586		rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3587				  cfile->fid.volatile_fid, cfile->pid, &eof);
3588		if (rc == 0) {
3589			cifsi->server_eof = off + len;
3590			cifs_setsize(inode, off + len);
3591			cifs_truncate_page(inode->i_mapping, inode->i_size);
3592			truncate_setsize(inode, off + len);
3593		}
3594		goto out;
3595	}
3596
3597	/*
3598	 * Files are non-sparse by default so falloc may be a no-op
3599	 * Must check if file sparse. If not sparse, and since we are not
3600	 * extending then no need to do anything since file already allocated
3601	 */
3602	if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3603		rc = 0;
3604		goto out;
3605	}
3606
3607	if (keep_size == true) {
3608		/*
3609		 * We can not preallocate pages beyond the end of the file
3610		 * in SMB2
3611		 */
3612		if (off >= i_size_read(inode)) {
3613			rc = 0;
3614			goto out;
3615		}
3616		/*
3617		 * For fallocates that are partially beyond the end of file,
3618		 * clamp len so we only fallocate up to the end of file.
3619		 */
3620		if (off + len > i_size_read(inode)) {
3621			len = i_size_read(inode) - off;
3622		}
 
 
 
 
 
 
3623	}
3624
3625	if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3626		/*
3627		 * At this point, we are trying to fallocate an internal
3628		 * regions of a sparse file. Since smb2 does not have a
3629		 * fallocate command we have two otions on how to emulate this.
3630		 * We can either turn the entire file to become non-sparse
3631		 * which we only do if the fallocate is for virtually
3632		 * the whole file,  or we can overwrite the region with zeroes
3633		 * using SMB2_write, which could be prohibitevly expensive
3634		 * if len is large.
3635		 */
3636		/*
3637		 * We are only trying to fallocate a small region so
3638		 * just write it with zero.
3639		 */
3640		if (len <= 1024 * 1024) {
3641			rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3642							 off, len);
3643			goto out;
3644		}
3645
3646		/*
3647		 * Check if falloc starts within first few pages of file
3648		 * and ends within a few pages of the end of file to
3649		 * ensure that most of file is being forced to be
3650		 * fallocated now. If so then setting whole file sparse
3651		 * ie potentially making a few extra pages at the beginning
3652		 * or end of the file non-sparse via set_sparse is harmless.
3653		 */
3654		if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3655			rc = -EOPNOTSUPP;
3656			goto out;
 
 
 
3657		}
3658	}
3659
3660	smb2_set_sparse(xid, tcon, cfile, inode, false);
3661	rc = 0;
 
 
 
 
 
 
 
 
 
 
3662
3663out:
3664	if (rc)
3665		trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3666				tcon->ses->Suid, off, len, rc);
3667	else
3668		trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3669				tcon->ses->Suid, off, len);
3670
3671	free_xid(xid);
3672	return rc;
3673}
3674
3675static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3676			    loff_t off, loff_t len)
3677{
3678	int rc;
3679	unsigned int xid;
3680	struct inode *inode = file_inode(file);
3681	struct cifsFileInfo *cfile = file->private_data;
3682	struct cifsInodeInfo *cifsi = CIFS_I(inode);
3683	__le64 eof;
3684	loff_t old_eof;
3685
3686	xid = get_xid();
3687
3688	inode_lock(inode);
3689
3690	old_eof = i_size_read(inode);
3691	if ((off >= old_eof) ||
3692	    off + len >= old_eof) {
3693		rc = -EINVAL;
3694		goto out;
3695	}
3696
3697	filemap_invalidate_lock(inode->i_mapping);
3698	rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3699	if (rc < 0)
3700		goto out_2;
3701
3702	truncate_pagecache_range(inode, off, old_eof);
3703
3704	rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3705				  old_eof - off - len, off);
3706	if (rc < 0)
3707		goto out_2;
3708
3709	eof = cpu_to_le64(old_eof - len);
3710	rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3711			  cfile->fid.volatile_fid, cfile->pid, &eof);
3712	if (rc < 0)
3713		goto out_2;
3714
3715	rc = 0;
3716
3717	cifsi->server_eof = i_size_read(inode) - len;
3718	truncate_setsize(inode, cifsi->server_eof);
3719	fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3720out_2:
3721	filemap_invalidate_unlock(inode->i_mapping);
3722 out:
3723	inode_unlock(inode);
3724	free_xid(xid);
3725	return rc;
3726}
3727
3728static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3729			      loff_t off, loff_t len)
3730{
3731	int rc;
3732	unsigned int xid;
3733	struct cifsFileInfo *cfile = file->private_data;
3734	struct inode *inode = file_inode(file);
3735	__le64 eof;
3736	__u64  count, old_eof;
3737
3738	xid = get_xid();
3739
3740	inode_lock(inode);
3741
3742	old_eof = i_size_read(inode);
3743	if (off >= old_eof) {
3744		rc = -EINVAL;
3745		goto out;
3746	}
3747
3748	count = old_eof - off;
3749	eof = cpu_to_le64(old_eof + len);
3750
3751	filemap_invalidate_lock(inode->i_mapping);
3752	rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3753	if (rc < 0)
3754		goto out_2;
3755	truncate_pagecache_range(inode, off, old_eof);
3756
3757	rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3758			  cfile->fid.volatile_fid, cfile->pid, &eof);
3759	if (rc < 0)
3760		goto out_2;
3761
3762	rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3763	if (rc < 0)
3764		goto out_2;
3765
3766	rc = smb3_zero_data(file, tcon, off, len, xid);
3767	if (rc < 0)
3768		goto out_2;
3769
3770	rc = 0;
3771out_2:
3772	filemap_invalidate_unlock(inode->i_mapping);
3773 out:
3774	inode_unlock(inode);
3775	free_xid(xid);
3776	return rc;
3777}
3778
3779static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3780{
3781	struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3782	struct cifsInodeInfo *cifsi;
3783	struct inode *inode;
3784	int rc = 0;
3785	struct file_allocated_range_buffer in_data, *out_data = NULL;
3786	u32 out_data_len;
3787	unsigned int xid;
3788
3789	if (whence != SEEK_HOLE && whence != SEEK_DATA)
3790		return generic_file_llseek(file, offset, whence);
3791
3792	inode = d_inode(cfile->dentry);
3793	cifsi = CIFS_I(inode);
3794
3795	if (offset < 0 || offset >= i_size_read(inode))
3796		return -ENXIO;
3797
3798	xid = get_xid();
3799	/*
3800	 * We need to be sure that all dirty pages are written as they
3801	 * might fill holes on the server.
3802	 * Note that we also MUST flush any written pages since at least
3803	 * some servers (Windows2016) will not reflect recent writes in
3804	 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3805	 */
3806	wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3807	if (wrcfile) {
3808		filemap_write_and_wait(inode->i_mapping);
3809		smb2_flush_file(xid, tcon, &wrcfile->fid);
3810		cifsFileInfo_put(wrcfile);
3811	}
3812
3813	if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3814		if (whence == SEEK_HOLE)
3815			offset = i_size_read(inode);
3816		goto lseek_exit;
3817	}
3818
3819	in_data.file_offset = cpu_to_le64(offset);
3820	in_data.length = cpu_to_le64(i_size_read(inode));
3821
3822	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3823			cfile->fid.volatile_fid,
3824			FSCTL_QUERY_ALLOCATED_RANGES,
3825			(char *)&in_data, sizeof(in_data),
3826			sizeof(struct file_allocated_range_buffer),
3827			(char **)&out_data, &out_data_len);
3828	if (rc == -E2BIG)
3829		rc = 0;
3830	if (rc)
3831		goto lseek_exit;
3832
3833	if (whence == SEEK_HOLE && out_data_len == 0)
3834		goto lseek_exit;
3835
3836	if (whence == SEEK_DATA && out_data_len == 0) {
3837		rc = -ENXIO;
3838		goto lseek_exit;
3839	}
3840
3841	if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3842		rc = -EINVAL;
3843		goto lseek_exit;
3844	}
3845	if (whence == SEEK_DATA) {
3846		offset = le64_to_cpu(out_data->file_offset);
3847		goto lseek_exit;
3848	}
3849	if (offset < le64_to_cpu(out_data->file_offset))
3850		goto lseek_exit;
3851
3852	offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3853
3854 lseek_exit:
3855	free_xid(xid);
3856	kfree(out_data);
3857	if (!rc)
3858		return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3859	else
3860		return rc;
3861}
3862
3863static int smb3_fiemap(struct cifs_tcon *tcon,
3864		       struct cifsFileInfo *cfile,
3865		       struct fiemap_extent_info *fei, u64 start, u64 len)
3866{
3867	unsigned int xid;
3868	struct file_allocated_range_buffer in_data, *out_data;
3869	u32 out_data_len;
3870	int i, num, rc, flags, last_blob;
3871	u64 next;
3872
3873	rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3874	if (rc)
3875		return rc;
3876
3877	xid = get_xid();
3878 again:
3879	in_data.file_offset = cpu_to_le64(start);
3880	in_data.length = cpu_to_le64(len);
3881
3882	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3883			cfile->fid.volatile_fid,
3884			FSCTL_QUERY_ALLOCATED_RANGES,
3885			(char *)&in_data, sizeof(in_data),
3886			1024 * sizeof(struct file_allocated_range_buffer),
3887			(char **)&out_data, &out_data_len);
3888	if (rc == -E2BIG) {
3889		last_blob = 0;
3890		rc = 0;
3891	} else
3892		last_blob = 1;
3893	if (rc)
3894		goto out;
3895
3896	if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3897		rc = -EINVAL;
3898		goto out;
3899	}
3900	if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3901		rc = -EINVAL;
3902		goto out;
3903	}
3904
3905	num = out_data_len / sizeof(struct file_allocated_range_buffer);
3906	for (i = 0; i < num; i++) {
3907		flags = 0;
3908		if (i == num - 1 && last_blob)
3909			flags |= FIEMAP_EXTENT_LAST;
3910
3911		rc = fiemap_fill_next_extent(fei,
3912				le64_to_cpu(out_data[i].file_offset),
3913				le64_to_cpu(out_data[i].file_offset),
3914				le64_to_cpu(out_data[i].length),
3915				flags);
3916		if (rc < 0)
3917			goto out;
3918		if (rc == 1) {
3919			rc = 0;
3920			goto out;
3921		}
3922	}
3923
3924	if (!last_blob) {
3925		next = le64_to_cpu(out_data[num - 1].file_offset) +
3926		  le64_to_cpu(out_data[num - 1].length);
3927		len = len - (next - start);
3928		start = next;
3929		goto again;
3930	}
3931
3932 out:
3933	free_xid(xid);
3934	kfree(out_data);
3935	return rc;
3936}
3937
3938static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3939			   loff_t off, loff_t len)
3940{
3941	/* KEEP_SIZE already checked for by do_fallocate */
3942	if (mode & FALLOC_FL_PUNCH_HOLE)
3943		return smb3_punch_hole(file, tcon, off, len);
3944	else if (mode & FALLOC_FL_ZERO_RANGE) {
3945		if (mode & FALLOC_FL_KEEP_SIZE)
3946			return smb3_zero_range(file, tcon, off, len, true);
3947		return smb3_zero_range(file, tcon, off, len, false);
3948	} else if (mode == FALLOC_FL_KEEP_SIZE)
3949		return smb3_simple_falloc(file, tcon, off, len, true);
3950	else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3951		return smb3_collapse_range(file, tcon, off, len);
3952	else if (mode == FALLOC_FL_INSERT_RANGE)
3953		return smb3_insert_range(file, tcon, off, len);
3954	else if (mode == 0)
3955		return smb3_simple_falloc(file, tcon, off, len, false);
3956
3957	return -EOPNOTSUPP;
3958}
3959
3960static void
3961smb2_downgrade_oplock(struct TCP_Server_Info *server,
3962		      struct cifsInodeInfo *cinode, __u32 oplock,
3963		      unsigned int epoch, bool *purge_cache)
3964{
3965	server->ops->set_oplock_level(cinode, oplock, 0, NULL);
 
 
 
 
3966}
3967
3968static void
3969smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3970		       unsigned int epoch, bool *purge_cache);
3971
3972static void
3973smb3_downgrade_oplock(struct TCP_Server_Info *server,
3974		       struct cifsInodeInfo *cinode, __u32 oplock,
3975		       unsigned int epoch, bool *purge_cache)
3976{
3977	unsigned int old_state = cinode->oplock;
3978	unsigned int old_epoch = cinode->epoch;
3979	unsigned int new_state;
3980
3981	if (epoch > old_epoch) {
3982		smb21_set_oplock_level(cinode, oplock, 0, NULL);
3983		cinode->epoch = epoch;
3984	}
3985
3986	new_state = cinode->oplock;
3987	*purge_cache = false;
3988
3989	if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3990	    (new_state & CIFS_CACHE_READ_FLG) == 0)
3991		*purge_cache = true;
3992	else if (old_state == new_state && (epoch - old_epoch > 1))
3993		*purge_cache = true;
3994}
3995
3996static void
3997smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3998		      unsigned int epoch, bool *purge_cache)
3999{
4000	oplock &= 0xFF;
4001	cinode->lease_granted = false;
4002	if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4003		return;
4004	if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
4005		cinode->oplock = CIFS_CACHE_RHW_FLG;
4006		cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
4007			 &cinode->netfs.inode);
4008	} else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
4009		cinode->oplock = CIFS_CACHE_RW_FLG;
4010		cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
4011			 &cinode->netfs.inode);
4012	} else if (oplock == SMB2_OPLOCK_LEVEL_II) {
4013		cinode->oplock = CIFS_CACHE_READ_FLG;
4014		cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
4015			 &cinode->netfs.inode);
4016	} else
4017		cinode->oplock = 0;
4018}
4019
4020static void
4021smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4022		       unsigned int epoch, bool *purge_cache)
4023{
4024	char message[5] = {0};
4025	unsigned int new_oplock = 0;
4026
4027	oplock &= 0xFF;
4028	cinode->lease_granted = true;
4029	if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4030		return;
4031
4032	/* Check if the server granted an oplock rather than a lease */
4033	if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4034		return smb2_set_oplock_level(cinode, oplock, epoch,
4035					     purge_cache);
4036
4037	if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4038		new_oplock |= CIFS_CACHE_READ_FLG;
4039		strcat(message, "R");
4040	}
4041	if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4042		new_oplock |= CIFS_CACHE_HANDLE_FLG;
4043		strcat(message, "H");
4044	}
4045	if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4046		new_oplock |= CIFS_CACHE_WRITE_FLG;
4047		strcat(message, "W");
4048	}
4049	if (!new_oplock)
4050		strncpy(message, "None", sizeof(message));
4051
4052	cinode->oplock = new_oplock;
4053	cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4054		 &cinode->netfs.inode);
4055}
4056
4057static void
4058smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4059		      unsigned int epoch, bool *purge_cache)
4060{
4061	unsigned int old_oplock = cinode->oplock;
4062
4063	smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4064
4065	if (purge_cache) {
4066		*purge_cache = false;
4067		if (old_oplock == CIFS_CACHE_READ_FLG) {
4068			if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4069			    (epoch - cinode->epoch > 0))
4070				*purge_cache = true;
4071			else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4072				 (epoch - cinode->epoch > 1))
4073				*purge_cache = true;
4074			else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4075				 (epoch - cinode->epoch > 1))
4076				*purge_cache = true;
4077			else if (cinode->oplock == 0 &&
4078				 (epoch - cinode->epoch > 0))
4079				*purge_cache = true;
4080		} else if (old_oplock == CIFS_CACHE_RH_FLG) {
4081			if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4082			    (epoch - cinode->epoch > 0))
4083				*purge_cache = true;
4084			else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4085				 (epoch - cinode->epoch > 1))
4086				*purge_cache = true;
4087		}
4088		cinode->epoch = epoch;
4089	}
4090}
4091
4092#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4093static bool
4094smb2_is_read_op(__u32 oplock)
4095{
4096	return oplock == SMB2_OPLOCK_LEVEL_II;
4097}
4098#endif /* CIFS_ALLOW_INSECURE_LEGACY */
4099
4100static bool
4101smb21_is_read_op(__u32 oplock)
4102{
4103	return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4104	       !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4105}
4106
4107static __le32
4108map_oplock_to_lease(u8 oplock)
4109{
4110	if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4111		return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4112	else if (oplock == SMB2_OPLOCK_LEVEL_II)
4113		return SMB2_LEASE_READ_CACHING_LE;
4114	else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4115		return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4116		       SMB2_LEASE_WRITE_CACHING_LE;
4117	return 0;
4118}
4119
4120static char *
4121smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4122{
4123	struct create_lease *buf;
4124
4125	buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4126	if (!buf)
4127		return NULL;
4128
4129	memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4130	buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4131
4132	buf->ccontext.DataOffset = cpu_to_le16(offsetof
4133					(struct create_lease, lcontext));
4134	buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4135	buf->ccontext.NameOffset = cpu_to_le16(offsetof
4136				(struct create_lease, Name));
4137	buf->ccontext.NameLength = cpu_to_le16(4);
4138	/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4139	buf->Name[0] = 'R';
4140	buf->Name[1] = 'q';
4141	buf->Name[2] = 'L';
4142	buf->Name[3] = 's';
4143	return (char *)buf;
4144}
4145
4146static char *
4147smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4148{
4149	struct create_lease_v2 *buf;
4150
4151	buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4152	if (!buf)
4153		return NULL;
4154
4155	memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4156	buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4157
4158	buf->ccontext.DataOffset = cpu_to_le16(offsetof
4159					(struct create_lease_v2, lcontext));
4160	buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4161	buf->ccontext.NameOffset = cpu_to_le16(offsetof
4162				(struct create_lease_v2, Name));
4163	buf->ccontext.NameLength = cpu_to_le16(4);
4164	/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4165	buf->Name[0] = 'R';
4166	buf->Name[1] = 'q';
4167	buf->Name[2] = 'L';
4168	buf->Name[3] = 's';
4169	return (char *)buf;
4170}
4171
4172static __u8
4173smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4174{
4175	struct create_lease *lc = (struct create_lease *)buf;
4176
4177	*epoch = 0; /* not used */
4178	if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4179		return SMB2_OPLOCK_LEVEL_NOCHANGE;
4180	return le32_to_cpu(lc->lcontext.LeaseState);
4181}
4182
4183static __u8
4184smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4185{
4186	struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4187
4188	*epoch = le16_to_cpu(lc->lcontext.Epoch);
4189	if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4190		return SMB2_OPLOCK_LEVEL_NOCHANGE;
4191	if (lease_key)
4192		memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4193	return le32_to_cpu(lc->lcontext.LeaseState);
4194}
4195
4196static unsigned int
4197smb2_wp_retry_size(struct inode *inode)
4198{
4199	return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4200		     SMB2_MAX_BUFFER_SIZE);
4201}
4202
4203static bool
4204smb2_dir_needs_close(struct cifsFileInfo *cfile)
4205{
4206	return !cfile->invalidHandle;
4207}
4208
4209static void
4210fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4211		   struct smb_rqst *old_rq, __le16 cipher_type)
4212{
4213	struct smb2_hdr *shdr =
4214			(struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4215
4216	memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4217	tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4218	tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4219	tr_hdr->Flags = cpu_to_le16(0x01);
4220	if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4221	    (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4222		get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4223	else
4224		get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4225	memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4226}
4227
4228static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4229				 int num_rqst, const u8 *sig, u8 **iv,
4230				 struct aead_request **req, struct scatterlist **sgl,
4231				 unsigned int *num_sgs)
 
4232{
4233	unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4234	unsigned int iv_size = crypto_aead_ivsize(tfm);
4235	unsigned int len;
4236	u8 *p;
4237
4238	*num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4239
4240	len = iv_size;
4241	len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4242	len = ALIGN(len, crypto_tfm_ctx_alignment());
4243	len += req_size;
4244	len = ALIGN(len, __alignof__(struct scatterlist));
4245	len += *num_sgs * sizeof(**sgl);
4246
4247	p = kmalloc(len, GFP_ATOMIC);
4248	if (!p)
4249		return NULL;
4250
4251	*iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4252	*req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4253						crypto_tfm_ctx_alignment());
4254	*sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4255					       __alignof__(struct scatterlist));
4256	return p;
4257}
4258
4259static void *smb2_get_aead_req(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4260			       int num_rqst, const u8 *sig, u8 **iv,
4261			       struct aead_request **req, struct scatterlist **sgl)
 
 
 
 
 
4262{
4263	unsigned int off, len, skip;
4264	struct scatterlist *sg;
4265	unsigned int num_sgs;
4266	unsigned long addr;
4267	int i, j;
4268	void *p;
 
 
 
 
4269
4270	p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, sgl, &num_sgs);
4271	if (!p)
4272		return NULL;
4273
4274	sg_init_table(*sgl, num_sgs);
4275	sg = *sgl;
4276
4277	/* Assumes the first rqst has a transform header as the first iov.
4278	 * I.e.
4279	 * rqst[0].rq_iov[0]  is transform header
4280	 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
4281	 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
4282	 */
4283	for (i = 0; i < num_rqst; i++) {
4284		/*
4285		 * The first rqst has a transform header where the
4286		 * first 20 bytes are not part of the encrypted blob.
4287		 */
4288		for (j = 0; j < rqst[i].rq_nvec; j++) {
4289			struct kvec *iov = &rqst[i].rq_iov[j];
4290
 
 
4291			skip = (i == 0) && (j == 0) ? 20 : 0;
4292			addr = (unsigned long)iov->iov_base + skip;
4293			len = iov->iov_len - skip;
4294			sg = cifs_sg_set_buf(sg, (void *)addr, len);
4295		}
 
4296		for (j = 0; j < rqst[i].rq_npages; j++) {
4297			rqst_page_get_length(&rqst[i], j, &len, &off);
4298			sg_set_page(sg++, rqst[i].rq_pages[j], len, off);
 
 
4299		}
4300	}
4301	cifs_sg_set_buf(sg, sig, SMB2_SIGNATURE_SIZE);
4302
4303	return p;
4304}
4305
4306static int
4307smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4308{
4309	struct TCP_Server_Info *pserver;
4310	struct cifs_ses *ses;
4311	u8 *ses_enc_key;
4312
4313	/* If server is a channel, select the primary channel */
4314	pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
4315
4316	spin_lock(&cifs_tcp_ses_lock);
4317	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4318		if (ses->Suid == ses_id) {
4319			spin_lock(&ses->ses_lock);
4320			ses_enc_key = enc ? ses->smb3encryptionkey :
4321				ses->smb3decryptionkey;
4322			memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4323			spin_unlock(&ses->ses_lock);
4324			spin_unlock(&cifs_tcp_ses_lock);
4325			return 0;
4326		}
4327	}
4328	spin_unlock(&cifs_tcp_ses_lock);
4329
4330	return -EAGAIN;
4331}
4332/*
4333 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4334 * iov[0]   - transform header (associate data),
4335 * iov[1-N] - SMB2 header and pages - data to encrypt.
4336 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4337 * untouched.
4338 */
4339static int
4340crypt_message(struct TCP_Server_Info *server, int num_rqst,
4341	      struct smb_rqst *rqst, int enc)
4342{
4343	struct smb2_transform_hdr *tr_hdr =
4344		(struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4345	unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4346	int rc = 0;
4347	struct scatterlist *sg;
4348	u8 sign[SMB2_SIGNATURE_SIZE] = {};
4349	u8 key[SMB3_ENC_DEC_KEY_SIZE];
4350	struct aead_request *req;
4351	u8 *iv;
 
4352	DECLARE_CRYPTO_WAIT(wait);
4353	struct crypto_aead *tfm;
4354	unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4355	void *creq;
4356
4357	rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4358	if (rc) {
4359		cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
4360			 enc ? "en" : "de");
4361		return rc;
4362	}
4363
4364	rc = smb3_crypto_aead_allocate(server);
4365	if (rc) {
4366		cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4367		return rc;
4368	}
4369
4370	tfm = enc ? server->secmech.enc : server->secmech.dec;
4371
4372	if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4373		(server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4374		rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4375	else
4376		rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4377
4378	if (rc) {
4379		cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4380		return rc;
4381	}
4382
4383	rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4384	if (rc) {
4385		cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4386		return rc;
4387	}
4388
4389	creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg);
4390	if (unlikely(!creq))
 
4391		return -ENOMEM;
 
4392
4393	if (!enc) {
4394		memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4395		crypt_len += SMB2_SIGNATURE_SIZE;
4396	}
4397
4398	if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4399	    (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4400		memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4401	else {
4402		iv[0] = 3;
4403		memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4404	}
4405
4406	aead_request_set_tfm(req, tfm);
4407	aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4408	aead_request_set_ad(req, assoc_data_len);
4409
4410	aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4411				  crypto_req_done, &wait);
4412
4413	rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4414				: crypto_aead_decrypt(req), &wait);
4415
4416	if (!rc && enc)
4417		memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4418
4419	kfree_sensitive(creq);
 
 
 
 
4420	return rc;
4421}
4422
4423void
4424smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4425{
4426	int i, j;
4427
4428	for (i = 0; i < num_rqst; i++) {
4429		if (rqst[i].rq_pages) {
4430			for (j = rqst[i].rq_npages - 1; j >= 0; j--)
4431				put_page(rqst[i].rq_pages[j]);
4432			kfree(rqst[i].rq_pages);
4433		}
4434	}
4435}
4436
4437/*
4438 * This function will initialize new_rq and encrypt the content.
4439 * The first entry, new_rq[0], only contains a single iov which contains
4440 * a smb2_transform_hdr and is pre-allocated by the caller.
4441 * This function then populates new_rq[1+] with the content from olq_rq[0+].
4442 *
4443 * The end result is an array of smb_rqst structures where the first structure
4444 * only contains a single iov for the transform header which we then can pass
4445 * to crypt_message().
4446 *
4447 * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4448 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4449 */
4450static int
4451smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4452		       struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4453{
4454	struct page **pages;
4455	struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4456	unsigned int npages;
4457	unsigned int orig_len = 0;
4458	int i, j;
4459	int rc = -ENOMEM;
4460
4461	for (i = 1; i < num_rqst; i++) {
4462		struct smb_rqst *old = &old_rq[i - 1];
4463		struct smb_rqst *new = &new_rq[i];
4464
4465		orig_len += smb_rqst_len(server, old);
4466		new->rq_iov = old->rq_iov;
4467		new->rq_nvec = old->rq_nvec;
4468
4469		npages = old->rq_npages;
4470		if (!npages)
4471			continue;
4472
4473		pages = kmalloc_array(npages, sizeof(struct page *),
4474				      GFP_KERNEL);
4475		if (!pages)
4476			goto err_free;
4477
4478		new->rq_pages = pages;
4479		new->rq_npages = npages;
4480		new->rq_offset = old->rq_offset;
4481		new->rq_pagesz = old->rq_pagesz;
4482		new->rq_tailsz = old->rq_tailsz;
 
 
 
 
4483
4484		for (j = 0; j < npages; j++) {
4485			pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4486			if (!pages[j])
4487				goto err_free;
4488		}
4489
4490		/* copy pages form the old */
4491		for (j = 0; j < npages; j++) {
 
4492			unsigned int offset, len;
4493
4494			rqst_page_get_length(new, j, &len, &offset);
 
 
 
4495
4496			memcpy_page(new->rq_pages[j], offset,
4497				    old->rq_pages[j], offset, len);
 
4498		}
4499	}
4500
4501	/* fill the 1st iov with a transform header */
4502	fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4503
4504	rc = crypt_message(server, num_rqst, new_rq, 1);
4505	cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4506	if (rc)
4507		goto err_free;
4508
4509	return rc;
4510
4511err_free:
4512	smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4513	return rc;
4514}
4515
4516static int
4517smb3_is_transform_hdr(void *buf)
4518{
4519	struct smb2_transform_hdr *trhdr = buf;
4520
4521	return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4522}
4523
4524static int
4525decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4526		 unsigned int buf_data_size, struct page **pages,
4527		 unsigned int npages, unsigned int page_data_size,
4528		 bool is_offloaded)
4529{
4530	struct kvec iov[2];
4531	struct smb_rqst rqst = {NULL};
4532	int rc;
4533
4534	iov[0].iov_base = buf;
4535	iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4536	iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4537	iov[1].iov_len = buf_data_size;
4538
4539	rqst.rq_iov = iov;
4540	rqst.rq_nvec = 2;
4541	rqst.rq_pages = pages;
4542	rqst.rq_npages = npages;
4543	rqst.rq_pagesz = PAGE_SIZE;
4544	rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4545
4546	rc = crypt_message(server, 1, &rqst, 0);
4547	cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4548
4549	if (rc)
4550		return rc;
4551
4552	memmove(buf, iov[1].iov_base, buf_data_size);
4553
4554	if (!is_offloaded)
4555		server->total_read = buf_data_size + page_data_size;
4556
4557	return rc;
4558}
4559
4560static int
4561read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4562		     unsigned int npages, unsigned int len)
4563{
4564	int i;
4565	int length;
4566
4567	for (i = 0; i < npages; i++) {
4568		struct page *page = pages[i];
4569		size_t n;
4570
4571		n = len;
4572		if (len >= PAGE_SIZE) {
4573			/* enough data to fill the page */
4574			n = PAGE_SIZE;
4575			len -= n;
4576		} else {
4577			zero_user(page, len, PAGE_SIZE - len);
4578			len = 0;
4579		}
4580		length = cifs_read_page_from_socket(server, page, 0, n);
4581		if (length < 0)
4582			return length;
4583		server->total_read += length;
4584	}
4585
4586	return 0;
4587}
4588
4589static int
4590init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4591	       unsigned int cur_off, struct bio_vec **page_vec)
4592{
4593	struct bio_vec *bvec;
4594	int i;
4595
4596	bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4597	if (!bvec)
4598		return -ENOMEM;
4599
4600	for (i = 0; i < npages; i++) {
4601		bvec[i].bv_page = pages[i];
4602		bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4603		bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4604		data_size -= bvec[i].bv_len;
4605	}
4606
4607	if (data_size != 0) {
4608		cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4609		kfree(bvec);
4610		return -EIO;
4611	}
4612
4613	*page_vec = bvec;
4614	return 0;
4615}
4616
4617static int
4618handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4619		 char *buf, unsigned int buf_len, struct page **pages,
4620		 unsigned int npages, unsigned int page_data_size,
4621		 bool is_offloaded)
4622{
4623	unsigned int data_offset;
4624	unsigned int data_len;
4625	unsigned int cur_off;
4626	unsigned int cur_page_idx;
4627	unsigned int pad_len;
4628	struct cifs_readdata *rdata = mid->callback_data;
4629	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4630	struct bio_vec *bvec = NULL;
4631	struct iov_iter iter;
4632	struct kvec iov;
4633	int length;
4634	bool use_rdma_mr = false;
4635
4636	if (shdr->Command != SMB2_READ) {
4637		cifs_server_dbg(VFS, "only big read responses are supported\n");
4638		return -ENOTSUPP;
4639	}
4640
4641	if (server->ops->is_session_expired &&
4642	    server->ops->is_session_expired(buf)) {
4643		if (!is_offloaded)
4644			cifs_reconnect(server, true);
4645		return -1;
4646	}
4647
4648	if (server->ops->is_status_pending &&
4649			server->ops->is_status_pending(buf, server))
4650		return -1;
4651
4652	/* set up first two iov to get credits */
4653	rdata->iov[0].iov_base = buf;
4654	rdata->iov[0].iov_len = 0;
4655	rdata->iov[1].iov_base = buf;
4656	rdata->iov[1].iov_len =
4657		min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4658	cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4659		 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4660	cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4661		 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4662
4663	rdata->result = server->ops->map_error(buf, true);
4664	if (rdata->result != 0) {
4665		cifs_dbg(FYI, "%s: server returned error %d\n",
4666			 __func__, rdata->result);
4667		/* normal error on read response */
4668		if (is_offloaded)
4669			mid->mid_state = MID_RESPONSE_RECEIVED;
4670		else
4671			dequeue_mid(mid, false);
4672		return 0;
4673	}
4674
4675	data_offset = server->ops->read_data_offset(buf);
4676#ifdef CONFIG_CIFS_SMB_DIRECT
4677	use_rdma_mr = rdata->mr;
4678#endif
4679	data_len = server->ops->read_data_length(buf, use_rdma_mr);
4680
4681	if (data_offset < server->vals->read_rsp_size) {
4682		/*
4683		 * win2k8 sometimes sends an offset of 0 when the read
4684		 * is beyond the EOF. Treat it as if the data starts just after
4685		 * the header.
4686		 */
4687		cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4688			 __func__, data_offset);
4689		data_offset = server->vals->read_rsp_size;
4690	} else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4691		/* data_offset is beyond the end of smallbuf */
4692		cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4693			 __func__, data_offset);
4694		rdata->result = -EIO;
4695		if (is_offloaded)
4696			mid->mid_state = MID_RESPONSE_MALFORMED;
4697		else
4698			dequeue_mid(mid, rdata->result);
4699		return 0;
4700	}
4701
4702	pad_len = data_offset - server->vals->read_rsp_size;
4703
4704	if (buf_len <= data_offset) {
4705		/* read response payload is in pages */
4706		cur_page_idx = pad_len / PAGE_SIZE;
4707		cur_off = pad_len % PAGE_SIZE;
4708
4709		if (cur_page_idx != 0) {
4710			/* data offset is beyond the 1st page of response */
4711			cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4712				 __func__, data_offset);
4713			rdata->result = -EIO;
4714			if (is_offloaded)
4715				mid->mid_state = MID_RESPONSE_MALFORMED;
4716			else
4717				dequeue_mid(mid, rdata->result);
4718			return 0;
4719		}
4720
4721		if (data_len > page_data_size - pad_len) {
4722			/* data_len is corrupt -- discard frame */
4723			rdata->result = -EIO;
4724			if (is_offloaded)
4725				mid->mid_state = MID_RESPONSE_MALFORMED;
4726			else
4727				dequeue_mid(mid, rdata->result);
4728			return 0;
4729		}
4730
4731		rdata->result = init_read_bvec(pages, npages, page_data_size,
4732					       cur_off, &bvec);
4733		if (rdata->result != 0) {
4734			if (is_offloaded)
4735				mid->mid_state = MID_RESPONSE_MALFORMED;
4736			else
4737				dequeue_mid(mid, rdata->result);
4738			return 0;
4739		}
4740
4741		iov_iter_bvec(&iter, ITER_SOURCE, bvec, npages, data_len);
4742	} else if (buf_len >= data_offset + data_len) {
4743		/* read response payload is in buf */
4744		WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4745		iov.iov_base = buf + data_offset;
4746		iov.iov_len = data_len;
4747		iov_iter_kvec(&iter, ITER_SOURCE, &iov, 1, data_len);
4748	} else {
4749		/* read response payload cannot be in both buf and pages */
4750		WARN_ONCE(1, "buf can not contain only a part of read data");
4751		rdata->result = -EIO;
4752		if (is_offloaded)
4753			mid->mid_state = MID_RESPONSE_MALFORMED;
4754		else
4755			dequeue_mid(mid, rdata->result);
4756		return 0;
4757	}
4758
4759	length = rdata->copy_into_pages(server, rdata, &iter);
4760
4761	kfree(bvec);
4762
4763	if (length < 0)
4764		return length;
4765
4766	if (is_offloaded)
4767		mid->mid_state = MID_RESPONSE_RECEIVED;
4768	else
4769		dequeue_mid(mid, false);
4770	return length;
4771}
4772
4773struct smb2_decrypt_work {
4774	struct work_struct decrypt;
4775	struct TCP_Server_Info *server;
4776	struct page **ppages;
4777	char *buf;
4778	unsigned int npages;
4779	unsigned int len;
4780};
4781
4782
4783static void smb2_decrypt_offload(struct work_struct *work)
4784{
4785	struct smb2_decrypt_work *dw = container_of(work,
4786				struct smb2_decrypt_work, decrypt);
4787	int i, rc;
4788	struct mid_q_entry *mid;
4789
4790	rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4791			      dw->ppages, dw->npages, dw->len, true);
4792	if (rc) {
4793		cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4794		goto free_pages;
4795	}
4796
4797	dw->server->lstrp = jiffies;
4798	mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4799	if (mid == NULL)
4800		cifs_dbg(FYI, "mid not found\n");
4801	else {
4802		mid->decrypted = true;
4803		rc = handle_read_data(dw->server, mid, dw->buf,
4804				      dw->server->vals->read_rsp_size,
4805				      dw->ppages, dw->npages, dw->len,
4806				      true);
4807		if (rc >= 0) {
4808#ifdef CONFIG_CIFS_STATS2
4809			mid->when_received = jiffies;
4810#endif
4811			if (dw->server->ops->is_network_name_deleted)
4812				dw->server->ops->is_network_name_deleted(dw->buf,
4813									 dw->server);
4814
4815			mid->callback(mid);
4816		} else {
4817			spin_lock(&dw->server->srv_lock);
4818			if (dw->server->tcpStatus == CifsNeedReconnect) {
4819				spin_lock(&dw->server->mid_lock);
4820				mid->mid_state = MID_RETRY_NEEDED;
4821				spin_unlock(&dw->server->mid_lock);
4822				spin_unlock(&dw->server->srv_lock);
4823				mid->callback(mid);
4824			} else {
4825				spin_lock(&dw->server->mid_lock);
4826				mid->mid_state = MID_REQUEST_SUBMITTED;
4827				mid->mid_flags &= ~(MID_DELETED);
4828				list_add_tail(&mid->qhead,
4829					&dw->server->pending_mid_q);
4830				spin_unlock(&dw->server->mid_lock);
4831				spin_unlock(&dw->server->srv_lock);
4832			}
4833		}
4834		release_mid(mid);
4835	}
4836
4837free_pages:
4838	for (i = dw->npages-1; i >= 0; i--)
4839		put_page(dw->ppages[i]);
4840
4841	kfree(dw->ppages);
4842	cifs_small_buf_release(dw->buf);
4843	kfree(dw);
4844}
4845
4846
4847static int
4848receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4849		       int *num_mids)
4850{
4851	char *buf = server->smallbuf;
4852	struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4853	unsigned int npages;
4854	struct page **pages;
4855	unsigned int len;
4856	unsigned int buflen = server->pdu_size;
4857	int rc;
4858	int i = 0;
4859	struct smb2_decrypt_work *dw;
4860
4861	*num_mids = 1;
4862	len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4863		sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4864
4865	rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4866	if (rc < 0)
4867		return rc;
4868	server->total_read += rc;
4869
4870	len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4871		server->vals->read_rsp_size;
4872	npages = DIV_ROUND_UP(len, PAGE_SIZE);
4873
4874	pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4875	if (!pages) {
4876		rc = -ENOMEM;
4877		goto discard_data;
4878	}
4879
4880	for (; i < npages; i++) {
4881		pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4882		if (!pages[i]) {
4883			rc = -ENOMEM;
4884			goto discard_data;
4885		}
4886	}
4887
4888	/* read read data into pages */
4889	rc = read_data_into_pages(server, pages, npages, len);
4890	if (rc)
4891		goto free_pages;
4892
4893	rc = cifs_discard_remaining_data(server);
4894	if (rc)
4895		goto free_pages;
4896
4897	/*
4898	 * For large reads, offload to different thread for better performance,
4899	 * use more cores decrypting which can be expensive
4900	 */
4901
4902	if ((server->min_offload) && (server->in_flight > 1) &&
4903	    (server->pdu_size >= server->min_offload)) {
4904		dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4905		if (dw == NULL)
4906			goto non_offloaded_decrypt;
4907
4908		dw->buf = server->smallbuf;
4909		server->smallbuf = (char *)cifs_small_buf_get();
4910
4911		INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4912
4913		dw->npages = npages;
4914		dw->server = server;
4915		dw->ppages = pages;
4916		dw->len = len;
4917		queue_work(decrypt_wq, &dw->decrypt);
4918		*num_mids = 0; /* worker thread takes care of finding mid */
4919		return -1;
4920	}
4921
4922non_offloaded_decrypt:
4923	rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4924			      pages, npages, len, false);
4925	if (rc)
4926		goto free_pages;
4927
4928	*mid = smb2_find_mid(server, buf);
4929	if (*mid == NULL)
4930		cifs_dbg(FYI, "mid not found\n");
4931	else {
4932		cifs_dbg(FYI, "mid found\n");
4933		(*mid)->decrypted = true;
4934		rc = handle_read_data(server, *mid, buf,
4935				      server->vals->read_rsp_size,
4936				      pages, npages, len, false);
4937		if (rc >= 0) {
4938			if (server->ops->is_network_name_deleted) {
4939				server->ops->is_network_name_deleted(buf,
4940								server);
4941			}
4942		}
4943	}
4944
4945free_pages:
4946	for (i = i - 1; i >= 0; i--)
4947		put_page(pages[i]);
4948	kfree(pages);
4949	return rc;
4950discard_data:
4951	cifs_discard_remaining_data(server);
4952	goto free_pages;
4953}
4954
4955static int
4956receive_encrypted_standard(struct TCP_Server_Info *server,
4957			   struct mid_q_entry **mids, char **bufs,
4958			   int *num_mids)
4959{
4960	int ret, length;
4961	char *buf = server->smallbuf;
4962	struct smb2_hdr *shdr;
4963	unsigned int pdu_length = server->pdu_size;
4964	unsigned int buf_size;
4965	struct mid_q_entry *mid_entry;
4966	int next_is_large;
4967	char *next_buffer = NULL;
4968
4969	*num_mids = 0;
4970
4971	/* switch to large buffer if too big for a small one */
4972	if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4973		server->large_buf = true;
4974		memcpy(server->bigbuf, buf, server->total_read);
4975		buf = server->bigbuf;
4976	}
4977
4978	/* now read the rest */
4979	length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4980				pdu_length - HEADER_SIZE(server) + 1);
4981	if (length < 0)
4982		return length;
4983	server->total_read += length;
4984
4985	buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4986	length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0, false);
4987	if (length)
4988		return length;
4989
4990	next_is_large = server->large_buf;
4991one_more:
4992	shdr = (struct smb2_hdr *)buf;
4993	if (shdr->NextCommand) {
4994		if (next_is_large)
4995			next_buffer = (char *)cifs_buf_get();
4996		else
4997			next_buffer = (char *)cifs_small_buf_get();
4998		memcpy(next_buffer,
4999		       buf + le32_to_cpu(shdr->NextCommand),
5000		       pdu_length - le32_to_cpu(shdr->NextCommand));
5001	}
5002
5003	mid_entry = smb2_find_mid(server, buf);
5004	if (mid_entry == NULL)
5005		cifs_dbg(FYI, "mid not found\n");
5006	else {
5007		cifs_dbg(FYI, "mid found\n");
5008		mid_entry->decrypted = true;
5009		mid_entry->resp_buf_size = server->pdu_size;
5010	}
5011
5012	if (*num_mids >= MAX_COMPOUND) {
5013		cifs_server_dbg(VFS, "too many PDUs in compound\n");
5014		return -1;
5015	}
5016	bufs[*num_mids] = buf;
5017	mids[(*num_mids)++] = mid_entry;
5018
5019	if (mid_entry && mid_entry->handle)
5020		ret = mid_entry->handle(server, mid_entry);
5021	else
5022		ret = cifs_handle_standard(server, mid_entry);
5023
5024	if (ret == 0 && shdr->NextCommand) {
5025		pdu_length -= le32_to_cpu(shdr->NextCommand);
5026		server->large_buf = next_is_large;
5027		if (next_is_large)
5028			server->bigbuf = buf = next_buffer;
5029		else
5030			server->smallbuf = buf = next_buffer;
5031		goto one_more;
5032	} else if (ret != 0) {
5033		/*
5034		 * ret != 0 here means that we didn't get to handle_mid() thus
5035		 * server->smallbuf and server->bigbuf are still valid. We need
5036		 * to free next_buffer because it is not going to be used
5037		 * anywhere.
5038		 */
5039		if (next_is_large)
5040			free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5041		else
5042			free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5043	}
5044
5045	return ret;
5046}
5047
5048static int
5049smb3_receive_transform(struct TCP_Server_Info *server,
5050		       struct mid_q_entry **mids, char **bufs, int *num_mids)
5051{
5052	char *buf = server->smallbuf;
5053	unsigned int pdu_length = server->pdu_size;
5054	struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5055	unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5056
5057	if (pdu_length < sizeof(struct smb2_transform_hdr) +
5058						sizeof(struct smb2_hdr)) {
5059		cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5060			 pdu_length);
5061		cifs_reconnect(server, true);
 
5062		return -ECONNABORTED;
5063	}
5064
5065	if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5066		cifs_server_dbg(VFS, "Transform message is broken\n");
5067		cifs_reconnect(server, true);
 
5068		return -ECONNABORTED;
5069	}
5070
5071	/* TODO: add support for compounds containing READ. */
5072	if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5073		return receive_encrypted_read(server, &mids[0], num_mids);
5074	}
5075
5076	return receive_encrypted_standard(server, mids, bufs, num_mids);
5077}
5078
5079int
5080smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5081{
5082	char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5083
5084	return handle_read_data(server, mid, buf, server->pdu_size,
5085				NULL, 0, 0, false);
5086}
5087
5088static int
5089smb2_next_header(char *buf)
5090{
5091	struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5092	struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5093
5094	if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5095		return sizeof(struct smb2_transform_hdr) +
5096		  le32_to_cpu(t_hdr->OriginalMessageSize);
5097
5098	return le32_to_cpu(hdr->NextCommand);
5099}
5100
5101static int
5102smb2_make_node(unsigned int xid, struct inode *inode,
5103	       struct dentry *dentry, struct cifs_tcon *tcon,
5104	       const char *full_path, umode_t mode, dev_t dev)
5105{
5106	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5107	int rc = -EPERM;
5108	struct cifs_open_info_data buf = {};
5109	struct cifs_io_parms io_parms = {0};
 
5110	__u32 oplock = 0;
5111	struct cifs_fid fid;
5112	struct cifs_open_parms oparms;
5113	unsigned int bytes_written;
5114	struct win_dev *pdev;
5115	struct kvec iov[2];
5116
5117	/*
5118	 * Check if mounted with mount parm 'sfu' mount parm.
5119	 * SFU emulation should work with all servers, but only
5120	 * supports block and char device (no socket & fifo),
5121	 * and was used by default in earlier versions of Windows
5122	 */
5123	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5124		return rc;
5125
5126	/*
5127	 * TODO: Add ability to create instead via reparse point. Windows (e.g.
5128	 * their current NFS server) uses this approach to expose special files
5129	 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5130	 */
5131
5132	if (!S_ISCHR(mode) && !S_ISBLK(mode))
5133		return rc;
5134
5135	cifs_dbg(FYI, "sfu compat create special file\n");
5136
 
 
 
 
 
 
 
 
 
5137	oparms.tcon = tcon;
5138	oparms.cifs_sb = cifs_sb;
5139	oparms.desired_access = GENERIC_WRITE;
5140	oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5141						    CREATE_OPTION_SPECIAL);
5142	oparms.disposition = FILE_CREATE;
5143	oparms.path = full_path;
5144	oparms.fid = &fid;
5145	oparms.reconnect = false;
5146
5147	if (tcon->ses->server->oplocks)
5148		oplock = REQ_OPLOCK;
5149	else
5150		oplock = 0;
5151	rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
5152	if (rc)
5153		return rc;
5154
5155	/*
5156	 * BB Do not bother to decode buf since no local inode yet to put
5157	 * timestamps in, but we can reuse it safely.
5158	 */
5159
5160	pdev = (struct win_dev *)&buf.fi;
5161	io_parms.pid = current->tgid;
5162	io_parms.tcon = tcon;
5163	io_parms.offset = 0;
5164	io_parms.length = sizeof(struct win_dev);
5165	iov[1].iov_base = &buf.fi;
5166	iov[1].iov_len = sizeof(struct win_dev);
5167	if (S_ISCHR(mode)) {
5168		memcpy(pdev->type, "IntxCHR", 8);
5169		pdev->major = cpu_to_le64(MAJOR(dev));
5170		pdev->minor = cpu_to_le64(MINOR(dev));
5171		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5172							&bytes_written, iov, 1);
5173	} else if (S_ISBLK(mode)) {
5174		memcpy(pdev->type, "IntxBLK", 8);
5175		pdev->major = cpu_to_le64(MAJOR(dev));
5176		pdev->minor = cpu_to_le64(MINOR(dev));
5177		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5178							&bytes_written, iov, 1);
5179	}
5180	tcon->ses->server->ops->close(xid, tcon, &fid);
5181	d_drop(dentry);
5182
5183	/* FIXME: add code here to set EAs */
5184
5185	cifs_free_open_info(&buf);
5186	return rc;
5187}
5188
5189#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5190struct smb_version_operations smb20_operations = {
5191	.compare_fids = smb2_compare_fids,
5192	.setup_request = smb2_setup_request,
5193	.setup_async_request = smb2_setup_async_request,
5194	.check_receive = smb2_check_receive,
5195	.add_credits = smb2_add_credits,
5196	.set_credits = smb2_set_credits,
5197	.get_credits_field = smb2_get_credits_field,
5198	.get_credits = smb2_get_credits,
5199	.wait_mtu_credits = cifs_wait_mtu_credits,
5200	.get_next_mid = smb2_get_next_mid,
5201	.revert_current_mid = smb2_revert_current_mid,
5202	.read_data_offset = smb2_read_data_offset,
5203	.read_data_length = smb2_read_data_length,
5204	.map_error = map_smb2_to_linux_error,
5205	.find_mid = smb2_find_mid,
5206	.check_message = smb2_check_message,
5207	.dump_detail = smb2_dump_detail,
5208	.clear_stats = smb2_clear_stats,
5209	.print_stats = smb2_print_stats,
5210	.is_oplock_break = smb2_is_valid_oplock_break,
5211	.handle_cancelled_mid = smb2_handle_cancelled_mid,
5212	.downgrade_oplock = smb2_downgrade_oplock,
5213	.need_neg = smb2_need_neg,
5214	.negotiate = smb2_negotiate,
5215	.negotiate_wsize = smb2_negotiate_wsize,
5216	.negotiate_rsize = smb2_negotiate_rsize,
5217	.sess_setup = SMB2_sess_setup,
5218	.logoff = SMB2_logoff,
5219	.tree_connect = SMB2_tcon,
5220	.tree_disconnect = SMB2_tdis,
5221	.qfs_tcon = smb2_qfs_tcon,
5222	.is_path_accessible = smb2_is_path_accessible,
5223	.can_echo = smb2_can_echo,
5224	.echo = SMB2_echo,
5225	.query_path_info = smb2_query_path_info,
5226	.get_srv_inum = smb2_get_srv_inum,
5227	.query_file_info = smb2_query_file_info,
5228	.set_path_size = smb2_set_path_size,
5229	.set_file_size = smb2_set_file_size,
5230	.set_file_info = smb2_set_file_info,
5231	.set_compression = smb2_set_compression,
5232	.mkdir = smb2_mkdir,
5233	.mkdir_setinfo = smb2_mkdir_setinfo,
5234	.rmdir = smb2_rmdir,
5235	.unlink = smb2_unlink,
5236	.rename = smb2_rename_path,
5237	.create_hardlink = smb2_create_hardlink,
5238	.query_symlink = smb2_query_symlink,
5239	.query_mf_symlink = smb3_query_mf_symlink,
5240	.create_mf_symlink = smb3_create_mf_symlink,
5241	.open = smb2_open_file,
5242	.set_fid = smb2_set_fid,
5243	.close = smb2_close_file,
5244	.flush = smb2_flush_file,
5245	.async_readv = smb2_async_readv,
5246	.async_writev = smb2_async_writev,
5247	.sync_read = smb2_sync_read,
5248	.sync_write = smb2_sync_write,
5249	.query_dir_first = smb2_query_dir_first,
5250	.query_dir_next = smb2_query_dir_next,
5251	.close_dir = smb2_close_dir,
5252	.calc_smb_size = smb2_calc_size,
5253	.is_status_pending = smb2_is_status_pending,
5254	.is_session_expired = smb2_is_session_expired,
5255	.oplock_response = smb2_oplock_response,
5256	.queryfs = smb2_queryfs,
5257	.mand_lock = smb2_mand_lock,
5258	.mand_unlock_range = smb2_unlock_range,
5259	.push_mand_locks = smb2_push_mandatory_locks,
5260	.get_lease_key = smb2_get_lease_key,
5261	.set_lease_key = smb2_set_lease_key,
5262	.new_lease_key = smb2_new_lease_key,
5263	.calc_signature = smb2_calc_signature,
5264	.is_read_op = smb2_is_read_op,
5265	.set_oplock_level = smb2_set_oplock_level,
5266	.create_lease_buf = smb2_create_lease_buf,
5267	.parse_lease_buf = smb2_parse_lease_buf,
5268	.copychunk_range = smb2_copychunk_range,
5269	.wp_retry_size = smb2_wp_retry_size,
5270	.dir_needs_close = smb2_dir_needs_close,
5271	.get_dfs_refer = smb2_get_dfs_refer,
5272	.select_sectype = smb2_select_sectype,
5273#ifdef CONFIG_CIFS_XATTR
5274	.query_all_EAs = smb2_query_eas,
5275	.set_EA = smb2_set_ea,
5276#endif /* CIFS_XATTR */
5277	.get_acl = get_smb2_acl,
5278	.get_acl_by_fid = get_smb2_acl_by_fid,
5279	.set_acl = set_smb2_acl,
5280	.next_header = smb2_next_header,
5281	.ioctl_query_info = smb2_ioctl_query_info,
5282	.make_node = smb2_make_node,
5283	.fiemap = smb3_fiemap,
5284	.llseek = smb3_llseek,
5285	.is_status_io_timeout = smb2_is_status_io_timeout,
5286	.is_network_name_deleted = smb2_is_network_name_deleted,
5287};
5288#endif /* CIFS_ALLOW_INSECURE_LEGACY */
5289
5290struct smb_version_operations smb21_operations = {
5291	.compare_fids = smb2_compare_fids,
5292	.setup_request = smb2_setup_request,
5293	.setup_async_request = smb2_setup_async_request,
5294	.check_receive = smb2_check_receive,
5295	.add_credits = smb2_add_credits,
5296	.set_credits = smb2_set_credits,
5297	.get_credits_field = smb2_get_credits_field,
5298	.get_credits = smb2_get_credits,
5299	.wait_mtu_credits = smb2_wait_mtu_credits,
5300	.adjust_credits = smb2_adjust_credits,
5301	.get_next_mid = smb2_get_next_mid,
5302	.revert_current_mid = smb2_revert_current_mid,
5303	.read_data_offset = smb2_read_data_offset,
5304	.read_data_length = smb2_read_data_length,
5305	.map_error = map_smb2_to_linux_error,
5306	.find_mid = smb2_find_mid,
5307	.check_message = smb2_check_message,
5308	.dump_detail = smb2_dump_detail,
5309	.clear_stats = smb2_clear_stats,
5310	.print_stats = smb2_print_stats,
5311	.is_oplock_break = smb2_is_valid_oplock_break,
5312	.handle_cancelled_mid = smb2_handle_cancelled_mid,
5313	.downgrade_oplock = smb2_downgrade_oplock,
5314	.need_neg = smb2_need_neg,
5315	.negotiate = smb2_negotiate,
5316	.negotiate_wsize = smb2_negotiate_wsize,
5317	.negotiate_rsize = smb2_negotiate_rsize,
5318	.sess_setup = SMB2_sess_setup,
5319	.logoff = SMB2_logoff,
5320	.tree_connect = SMB2_tcon,
5321	.tree_disconnect = SMB2_tdis,
5322	.qfs_tcon = smb2_qfs_tcon,
5323	.is_path_accessible = smb2_is_path_accessible,
5324	.can_echo = smb2_can_echo,
5325	.echo = SMB2_echo,
5326	.query_path_info = smb2_query_path_info,
5327	.get_srv_inum = smb2_get_srv_inum,
5328	.query_file_info = smb2_query_file_info,
5329	.set_path_size = smb2_set_path_size,
5330	.set_file_size = smb2_set_file_size,
5331	.set_file_info = smb2_set_file_info,
5332	.set_compression = smb2_set_compression,
5333	.mkdir = smb2_mkdir,
5334	.mkdir_setinfo = smb2_mkdir_setinfo,
5335	.rmdir = smb2_rmdir,
5336	.unlink = smb2_unlink,
5337	.rename = smb2_rename_path,
5338	.create_hardlink = smb2_create_hardlink,
5339	.query_symlink = smb2_query_symlink,
5340	.query_mf_symlink = smb3_query_mf_symlink,
5341	.create_mf_symlink = smb3_create_mf_symlink,
5342	.open = smb2_open_file,
5343	.set_fid = smb2_set_fid,
5344	.close = smb2_close_file,
5345	.flush = smb2_flush_file,
5346	.async_readv = smb2_async_readv,
5347	.async_writev = smb2_async_writev,
5348	.sync_read = smb2_sync_read,
5349	.sync_write = smb2_sync_write,
5350	.query_dir_first = smb2_query_dir_first,
5351	.query_dir_next = smb2_query_dir_next,
5352	.close_dir = smb2_close_dir,
5353	.calc_smb_size = smb2_calc_size,
5354	.is_status_pending = smb2_is_status_pending,
5355	.is_session_expired = smb2_is_session_expired,
5356	.oplock_response = smb2_oplock_response,
5357	.queryfs = smb2_queryfs,
5358	.mand_lock = smb2_mand_lock,
5359	.mand_unlock_range = smb2_unlock_range,
5360	.push_mand_locks = smb2_push_mandatory_locks,
5361	.get_lease_key = smb2_get_lease_key,
5362	.set_lease_key = smb2_set_lease_key,
5363	.new_lease_key = smb2_new_lease_key,
5364	.calc_signature = smb2_calc_signature,
5365	.is_read_op = smb21_is_read_op,
5366	.set_oplock_level = smb21_set_oplock_level,
5367	.create_lease_buf = smb2_create_lease_buf,
5368	.parse_lease_buf = smb2_parse_lease_buf,
5369	.copychunk_range = smb2_copychunk_range,
5370	.wp_retry_size = smb2_wp_retry_size,
5371	.dir_needs_close = smb2_dir_needs_close,
5372	.enum_snapshots = smb3_enum_snapshots,
5373	.notify = smb3_notify,
5374	.get_dfs_refer = smb2_get_dfs_refer,
5375	.select_sectype = smb2_select_sectype,
5376#ifdef CONFIG_CIFS_XATTR
5377	.query_all_EAs = smb2_query_eas,
5378	.set_EA = smb2_set_ea,
5379#endif /* CIFS_XATTR */
5380	.get_acl = get_smb2_acl,
5381	.get_acl_by_fid = get_smb2_acl_by_fid,
5382	.set_acl = set_smb2_acl,
5383	.next_header = smb2_next_header,
5384	.ioctl_query_info = smb2_ioctl_query_info,
5385	.make_node = smb2_make_node,
5386	.fiemap = smb3_fiemap,
5387	.llseek = smb3_llseek,
5388	.is_status_io_timeout = smb2_is_status_io_timeout,
5389	.is_network_name_deleted = smb2_is_network_name_deleted,
5390};
5391
5392struct smb_version_operations smb30_operations = {
5393	.compare_fids = smb2_compare_fids,
5394	.setup_request = smb2_setup_request,
5395	.setup_async_request = smb2_setup_async_request,
5396	.check_receive = smb2_check_receive,
5397	.add_credits = smb2_add_credits,
5398	.set_credits = smb2_set_credits,
5399	.get_credits_field = smb2_get_credits_field,
5400	.get_credits = smb2_get_credits,
5401	.wait_mtu_credits = smb2_wait_mtu_credits,
5402	.adjust_credits = smb2_adjust_credits,
5403	.get_next_mid = smb2_get_next_mid,
5404	.revert_current_mid = smb2_revert_current_mid,
5405	.read_data_offset = smb2_read_data_offset,
5406	.read_data_length = smb2_read_data_length,
5407	.map_error = map_smb2_to_linux_error,
5408	.find_mid = smb2_find_mid,
5409	.check_message = smb2_check_message,
5410	.dump_detail = smb2_dump_detail,
5411	.clear_stats = smb2_clear_stats,
5412	.print_stats = smb2_print_stats,
5413	.dump_share_caps = smb2_dump_share_caps,
5414	.is_oplock_break = smb2_is_valid_oplock_break,
5415	.handle_cancelled_mid = smb2_handle_cancelled_mid,
5416	.downgrade_oplock = smb3_downgrade_oplock,
5417	.need_neg = smb2_need_neg,
5418	.negotiate = smb2_negotiate,
5419	.negotiate_wsize = smb3_negotiate_wsize,
5420	.negotiate_rsize = smb3_negotiate_rsize,
5421	.sess_setup = SMB2_sess_setup,
5422	.logoff = SMB2_logoff,
5423	.tree_connect = SMB2_tcon,
5424	.tree_disconnect = SMB2_tdis,
5425	.qfs_tcon = smb3_qfs_tcon,
5426	.is_path_accessible = smb2_is_path_accessible,
5427	.can_echo = smb2_can_echo,
5428	.echo = SMB2_echo,
5429	.query_path_info = smb2_query_path_info,
5430	/* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5431	.query_reparse_tag = smb2_query_reparse_tag,
5432	.get_srv_inum = smb2_get_srv_inum,
5433	.query_file_info = smb2_query_file_info,
5434	.set_path_size = smb2_set_path_size,
5435	.set_file_size = smb2_set_file_size,
5436	.set_file_info = smb2_set_file_info,
5437	.set_compression = smb2_set_compression,
5438	.mkdir = smb2_mkdir,
5439	.mkdir_setinfo = smb2_mkdir_setinfo,
5440	.rmdir = smb2_rmdir,
5441	.unlink = smb2_unlink,
5442	.rename = smb2_rename_path,
5443	.create_hardlink = smb2_create_hardlink,
5444	.query_symlink = smb2_query_symlink,
5445	.query_mf_symlink = smb3_query_mf_symlink,
5446	.create_mf_symlink = smb3_create_mf_symlink,
5447	.open = smb2_open_file,
5448	.set_fid = smb2_set_fid,
5449	.close = smb2_close_file,
5450	.close_getattr = smb2_close_getattr,
5451	.flush = smb2_flush_file,
5452	.async_readv = smb2_async_readv,
5453	.async_writev = smb2_async_writev,
5454	.sync_read = smb2_sync_read,
5455	.sync_write = smb2_sync_write,
5456	.query_dir_first = smb2_query_dir_first,
5457	.query_dir_next = smb2_query_dir_next,
5458	.close_dir = smb2_close_dir,
5459	.calc_smb_size = smb2_calc_size,
5460	.is_status_pending = smb2_is_status_pending,
5461	.is_session_expired = smb2_is_session_expired,
5462	.oplock_response = smb2_oplock_response,
5463	.queryfs = smb2_queryfs,
5464	.mand_lock = smb2_mand_lock,
5465	.mand_unlock_range = smb2_unlock_range,
5466	.push_mand_locks = smb2_push_mandatory_locks,
5467	.get_lease_key = smb2_get_lease_key,
5468	.set_lease_key = smb2_set_lease_key,
5469	.new_lease_key = smb2_new_lease_key,
5470	.generate_signingkey = generate_smb30signingkey,
5471	.calc_signature = smb3_calc_signature,
5472	.set_integrity  = smb3_set_integrity,
5473	.is_read_op = smb21_is_read_op,
5474	.set_oplock_level = smb3_set_oplock_level,
5475	.create_lease_buf = smb3_create_lease_buf,
5476	.parse_lease_buf = smb3_parse_lease_buf,
5477	.copychunk_range = smb2_copychunk_range,
5478	.duplicate_extents = smb2_duplicate_extents,
5479	.validate_negotiate = smb3_validate_negotiate,
5480	.wp_retry_size = smb2_wp_retry_size,
5481	.dir_needs_close = smb2_dir_needs_close,
5482	.fallocate = smb3_fallocate,
5483	.enum_snapshots = smb3_enum_snapshots,
5484	.notify = smb3_notify,
5485	.init_transform_rq = smb3_init_transform_rq,
5486	.is_transform_hdr = smb3_is_transform_hdr,
5487	.receive_transform = smb3_receive_transform,
5488	.get_dfs_refer = smb2_get_dfs_refer,
5489	.select_sectype = smb2_select_sectype,
5490#ifdef CONFIG_CIFS_XATTR
5491	.query_all_EAs = smb2_query_eas,
5492	.set_EA = smb2_set_ea,
5493#endif /* CIFS_XATTR */
5494	.get_acl = get_smb2_acl,
5495	.get_acl_by_fid = get_smb2_acl_by_fid,
5496	.set_acl = set_smb2_acl,
5497	.next_header = smb2_next_header,
5498	.ioctl_query_info = smb2_ioctl_query_info,
5499	.make_node = smb2_make_node,
5500	.fiemap = smb3_fiemap,
5501	.llseek = smb3_llseek,
5502	.is_status_io_timeout = smb2_is_status_io_timeout,
5503	.is_network_name_deleted = smb2_is_network_name_deleted,
5504};
5505
5506struct smb_version_operations smb311_operations = {
5507	.compare_fids = smb2_compare_fids,
5508	.setup_request = smb2_setup_request,
5509	.setup_async_request = smb2_setup_async_request,
5510	.check_receive = smb2_check_receive,
5511	.add_credits = smb2_add_credits,
5512	.set_credits = smb2_set_credits,
5513	.get_credits_field = smb2_get_credits_field,
5514	.get_credits = smb2_get_credits,
5515	.wait_mtu_credits = smb2_wait_mtu_credits,
5516	.adjust_credits = smb2_adjust_credits,
5517	.get_next_mid = smb2_get_next_mid,
5518	.revert_current_mid = smb2_revert_current_mid,
5519	.read_data_offset = smb2_read_data_offset,
5520	.read_data_length = smb2_read_data_length,
5521	.map_error = map_smb2_to_linux_error,
5522	.find_mid = smb2_find_mid,
5523	.check_message = smb2_check_message,
5524	.dump_detail = smb2_dump_detail,
5525	.clear_stats = smb2_clear_stats,
5526	.print_stats = smb2_print_stats,
5527	.dump_share_caps = smb2_dump_share_caps,
5528	.is_oplock_break = smb2_is_valid_oplock_break,
5529	.handle_cancelled_mid = smb2_handle_cancelled_mid,
5530	.downgrade_oplock = smb3_downgrade_oplock,
5531	.need_neg = smb2_need_neg,
5532	.negotiate = smb2_negotiate,
5533	.negotiate_wsize = smb3_negotiate_wsize,
5534	.negotiate_rsize = smb3_negotiate_rsize,
5535	.sess_setup = SMB2_sess_setup,
5536	.logoff = SMB2_logoff,
5537	.tree_connect = SMB2_tcon,
5538	.tree_disconnect = SMB2_tdis,
5539	.qfs_tcon = smb3_qfs_tcon,
5540	.is_path_accessible = smb2_is_path_accessible,
5541	.can_echo = smb2_can_echo,
5542	.echo = SMB2_echo,
5543	.query_path_info = smb2_query_path_info,
5544	.query_reparse_tag = smb2_query_reparse_tag,
5545	.get_srv_inum = smb2_get_srv_inum,
5546	.query_file_info = smb2_query_file_info,
5547	.set_path_size = smb2_set_path_size,
5548	.set_file_size = smb2_set_file_size,
5549	.set_file_info = smb2_set_file_info,
5550	.set_compression = smb2_set_compression,
5551	.mkdir = smb2_mkdir,
5552	.mkdir_setinfo = smb2_mkdir_setinfo,
5553	.posix_mkdir = smb311_posix_mkdir,
5554	.rmdir = smb2_rmdir,
5555	.unlink = smb2_unlink,
5556	.rename = smb2_rename_path,
5557	.create_hardlink = smb2_create_hardlink,
5558	.query_symlink = smb2_query_symlink,
5559	.query_mf_symlink = smb3_query_mf_symlink,
5560	.create_mf_symlink = smb3_create_mf_symlink,
5561	.open = smb2_open_file,
5562	.set_fid = smb2_set_fid,
5563	.close = smb2_close_file,
5564	.close_getattr = smb2_close_getattr,
5565	.flush = smb2_flush_file,
5566	.async_readv = smb2_async_readv,
5567	.async_writev = smb2_async_writev,
5568	.sync_read = smb2_sync_read,
5569	.sync_write = smb2_sync_write,
5570	.query_dir_first = smb2_query_dir_first,
5571	.query_dir_next = smb2_query_dir_next,
5572	.close_dir = smb2_close_dir,
5573	.calc_smb_size = smb2_calc_size,
5574	.is_status_pending = smb2_is_status_pending,
5575	.is_session_expired = smb2_is_session_expired,
5576	.oplock_response = smb2_oplock_response,
5577	.queryfs = smb311_queryfs,
5578	.mand_lock = smb2_mand_lock,
5579	.mand_unlock_range = smb2_unlock_range,
5580	.push_mand_locks = smb2_push_mandatory_locks,
5581	.get_lease_key = smb2_get_lease_key,
5582	.set_lease_key = smb2_set_lease_key,
5583	.new_lease_key = smb2_new_lease_key,
5584	.generate_signingkey = generate_smb311signingkey,
5585	.calc_signature = smb3_calc_signature,
5586	.set_integrity  = smb3_set_integrity,
5587	.is_read_op = smb21_is_read_op,
5588	.set_oplock_level = smb3_set_oplock_level,
5589	.create_lease_buf = smb3_create_lease_buf,
5590	.parse_lease_buf = smb3_parse_lease_buf,
5591	.copychunk_range = smb2_copychunk_range,
5592	.duplicate_extents = smb2_duplicate_extents,
5593/*	.validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5594	.wp_retry_size = smb2_wp_retry_size,
5595	.dir_needs_close = smb2_dir_needs_close,
5596	.fallocate = smb3_fallocate,
5597	.enum_snapshots = smb3_enum_snapshots,
5598	.notify = smb3_notify,
5599	.init_transform_rq = smb3_init_transform_rq,
5600	.is_transform_hdr = smb3_is_transform_hdr,
5601	.receive_transform = smb3_receive_transform,
5602	.get_dfs_refer = smb2_get_dfs_refer,
5603	.select_sectype = smb2_select_sectype,
5604#ifdef CONFIG_CIFS_XATTR
5605	.query_all_EAs = smb2_query_eas,
5606	.set_EA = smb2_set_ea,
5607#endif /* CIFS_XATTR */
5608	.get_acl = get_smb2_acl,
5609	.get_acl_by_fid = get_smb2_acl_by_fid,
5610	.set_acl = set_smb2_acl,
5611	.next_header = smb2_next_header,
5612	.ioctl_query_info = smb2_ioctl_query_info,
5613	.make_node = smb2_make_node,
5614	.fiemap = smb3_fiemap,
5615	.llseek = smb3_llseek,
5616	.is_status_io_timeout = smb2_is_status_io_timeout,
5617	.is_network_name_deleted = smb2_is_network_name_deleted,
5618};
5619
5620#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5621struct smb_version_values smb20_values = {
5622	.version_string = SMB20_VERSION_STRING,
5623	.protocol_id = SMB20_PROT_ID,
5624	.req_capabilities = 0, /* MBZ */
5625	.large_lock_type = 0,
5626	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5627	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5628	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5629	.header_size = sizeof(struct smb2_hdr),
5630	.header_preamble_size = 0,
5631	.max_header_size = MAX_SMB2_HDR_SIZE,
5632	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5633	.lock_cmd = SMB2_LOCK,
5634	.cap_unix = 0,
5635	.cap_nt_find = SMB2_NT_FIND,
5636	.cap_large_files = SMB2_LARGE_FILES,
5637	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5638	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5639	.create_lease_size = sizeof(struct create_lease),
5640};
5641#endif /* ALLOW_INSECURE_LEGACY */
5642
5643struct smb_version_values smb21_values = {
5644	.version_string = SMB21_VERSION_STRING,
5645	.protocol_id = SMB21_PROT_ID,
5646	.req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5647	.large_lock_type = 0,
5648	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5649	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5650	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5651	.header_size = sizeof(struct smb2_hdr),
5652	.header_preamble_size = 0,
5653	.max_header_size = MAX_SMB2_HDR_SIZE,
5654	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5655	.lock_cmd = SMB2_LOCK,
5656	.cap_unix = 0,
5657	.cap_nt_find = SMB2_NT_FIND,
5658	.cap_large_files = SMB2_LARGE_FILES,
5659	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5660	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5661	.create_lease_size = sizeof(struct create_lease),
5662};
5663
5664struct smb_version_values smb3any_values = {
5665	.version_string = SMB3ANY_VERSION_STRING,
5666	.protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5667	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5668	.large_lock_type = 0,
5669	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5670	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5671	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5672	.header_size = sizeof(struct smb2_hdr),
5673	.header_preamble_size = 0,
5674	.max_header_size = MAX_SMB2_HDR_SIZE,
5675	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5676	.lock_cmd = SMB2_LOCK,
5677	.cap_unix = 0,
5678	.cap_nt_find = SMB2_NT_FIND,
5679	.cap_large_files = SMB2_LARGE_FILES,
5680	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5681	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5682	.create_lease_size = sizeof(struct create_lease_v2),
5683};
5684
5685struct smb_version_values smbdefault_values = {
5686	.version_string = SMBDEFAULT_VERSION_STRING,
5687	.protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5688	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5689	.large_lock_type = 0,
5690	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5691	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5692	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5693	.header_size = sizeof(struct smb2_hdr),
5694	.header_preamble_size = 0,
5695	.max_header_size = MAX_SMB2_HDR_SIZE,
5696	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5697	.lock_cmd = SMB2_LOCK,
5698	.cap_unix = 0,
5699	.cap_nt_find = SMB2_NT_FIND,
5700	.cap_large_files = SMB2_LARGE_FILES,
5701	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5702	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5703	.create_lease_size = sizeof(struct create_lease_v2),
5704};
5705
5706struct smb_version_values smb30_values = {
5707	.version_string = SMB30_VERSION_STRING,
5708	.protocol_id = SMB30_PROT_ID,
5709	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5710	.large_lock_type = 0,
5711	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5712	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5713	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5714	.header_size = sizeof(struct smb2_hdr),
5715	.header_preamble_size = 0,
5716	.max_header_size = MAX_SMB2_HDR_SIZE,
5717	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5718	.lock_cmd = SMB2_LOCK,
5719	.cap_unix = 0,
5720	.cap_nt_find = SMB2_NT_FIND,
5721	.cap_large_files = SMB2_LARGE_FILES,
5722	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5723	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5724	.create_lease_size = sizeof(struct create_lease_v2),
5725};
5726
5727struct smb_version_values smb302_values = {
5728	.version_string = SMB302_VERSION_STRING,
5729	.protocol_id = SMB302_PROT_ID,
5730	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5731	.large_lock_type = 0,
5732	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5733	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5734	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5735	.header_size = sizeof(struct smb2_hdr),
5736	.header_preamble_size = 0,
5737	.max_header_size = MAX_SMB2_HDR_SIZE,
5738	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5739	.lock_cmd = SMB2_LOCK,
5740	.cap_unix = 0,
5741	.cap_nt_find = SMB2_NT_FIND,
5742	.cap_large_files = SMB2_LARGE_FILES,
5743	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5744	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5745	.create_lease_size = sizeof(struct create_lease_v2),
5746};
5747
5748struct smb_version_values smb311_values = {
5749	.version_string = SMB311_VERSION_STRING,
5750	.protocol_id = SMB311_PROT_ID,
5751	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5752	.large_lock_type = 0,
5753	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5754	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5755	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5756	.header_size = sizeof(struct smb2_hdr),
5757	.header_preamble_size = 0,
5758	.max_header_size = MAX_SMB2_HDR_SIZE,
5759	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5760	.lock_cmd = SMB2_LOCK,
5761	.cap_unix = 0,
5762	.cap_nt_find = SMB2_NT_FIND,
5763	.cap_large_files = SMB2_LARGE_FILES,
5764	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5765	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5766	.create_lease_size = sizeof(struct create_lease_v2),
5767};