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 <crypto/aead.h>
 
 
  14#include "cifsglob.h"
  15#include "smb2pdu.h"
  16#include "smb2proto.h"
  17#include "cifsproto.h"
  18#include "cifs_debug.h"
  19#include "cifs_unicode.h"
  20#include "smb2status.h"
  21#include "smb2glob.h"
  22#include "cifs_ioctl.h"
  23#include "smbdirect.h"
 
  24
  25/* Change credits for different ops and return the total number of credits */
  26static int
  27change_conf(struct TCP_Server_Info *server)
  28{
  29	server->credits += server->echo_credits + server->oplock_credits;
  30	server->oplock_credits = server->echo_credits = 0;
  31	switch (server->credits) {
  32	case 0:
  33		return 0;
  34	case 1:
  35		server->echoes = false;
  36		server->oplocks = false;
  37		break;
  38	case 2:
  39		server->echoes = true;
  40		server->oplocks = false;
  41		server->echo_credits = 1;
  42		break;
  43	default:
  44		server->echoes = true;
  45		if (enable_oplocks) {
  46			server->oplocks = true;
  47			server->oplock_credits = 1;
  48		} else
  49			server->oplocks = false;
  50
  51		server->echo_credits = 1;
  52	}
  53	server->credits -= server->echo_credits + server->oplock_credits;
  54	return server->credits + server->echo_credits + server->oplock_credits;
  55}
  56
  57static void
  58smb2_add_credits(struct TCP_Server_Info *server,
  59		 const struct cifs_credits *credits, const int optype)
  60{
  61	int *val, rc = -1;
 
  62	unsigned int add = credits->value;
  63	unsigned int instance = credits->instance;
  64	bool reconnect_detected = false;
 
  65
  66	spin_lock(&server->req_lock);
  67	val = server->ops->get_credits_field(server, optype);
  68
  69	/* eg found case where write overlapping reconnect messed up credits */
  70	if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  71		trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
  72			server->hostname, *val);
  73	if ((instance == 0) || (instance == server->reconnect_instance))
  74		*val += add;
  75	else
  76		reconnect_detected = true;
  77
  78	if (*val > 65000) {
  79		*val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  80		printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  81	}
  82	server->in_flight--;
  83	if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
 
 
  84		rc = change_conf(server);
  85	/*
  86	 * Sometimes server returns 0 credits on oplock break ack - we need to
  87	 * rebalance credits in this case.
  88	 */
  89	else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  90		 server->oplocks) {
  91		if (server->credits > 1) {
  92			server->credits--;
  93			server->oplock_credits++;
  94		}
  95	}
 
 
  96	spin_unlock(&server->req_lock);
  97	wake_up(&server->request_q);
  98
  99	if (reconnect_detected)
 
 
 
 100		cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 101			 add, instance);
 
 
 
 
 
 
 
 
 102
 103	if (server->tcpStatus == CifsNeedReconnect
 104	    || server->tcpStatus == CifsExiting)
 105		return;
 106
 107	switch (rc) {
 108	case -1:
 109		/* change_conf hasn't been executed */
 110		break;
 111	case 0:
 112		cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 113		break;
 114	case 1:
 115		cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 116		break;
 117	case 2:
 118		cifs_dbg(FYI, "disabling oplocks\n");
 119		break;
 120	default:
 121		cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
 
 122	}
 
 
 
 
 123}
 124
 125static void
 126smb2_set_credits(struct TCP_Server_Info *server, const int val)
 127{
 
 
 128	spin_lock(&server->req_lock);
 129	server->credits = val;
 130	if (val == 1)
 131		server->reconnect_instance++;
 
 
 132	spin_unlock(&server->req_lock);
 
 
 
 
 
 133	/* don't log while holding the lock */
 134	if (val == 1)
 135		cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 136}
 137
 138static int *
 139smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 140{
 141	switch (optype) {
 142	case CIFS_ECHO_OP:
 143		return &server->echo_credits;
 144	case CIFS_OBREAK_OP:
 145		return &server->oplock_credits;
 146	default:
 147		return &server->credits;
 148	}
 149}
 150
 151static unsigned int
 152smb2_get_credits(struct mid_q_entry *mid)
 153{
 154	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
 155
 156	if (mid->mid_state == MID_RESPONSE_RECEIVED
 157	    || mid->mid_state == MID_RESPONSE_MALFORMED)
 158		return le16_to_cpu(shdr->CreditRequest);
 159
 160	return 0;
 161}
 162
 163static int
 164smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 165		      unsigned int *num, struct cifs_credits *credits)
 166{
 167	int rc = 0;
 168	unsigned int scredits;
 169
 170	spin_lock(&server->req_lock);
 171	while (1) {
 172		if (server->credits <= 0) {
 173			spin_unlock(&server->req_lock);
 174			cifs_num_waiters_inc(server);
 175			rc = wait_event_killable(server->request_q,
 176				has_credits(server, &server->credits, 1));
 177			cifs_num_waiters_dec(server);
 178			if (rc)
 179				return rc;
 180			spin_lock(&server->req_lock);
 181		} else {
 182			if (server->tcpStatus == CifsExiting) {
 183				spin_unlock(&server->req_lock);
 184				return -ENOENT;
 185			}
 186
 187			scredits = server->credits;
 188			/* can deadlock with reopen */
 189			if (scredits <= 8) {
 190				*num = SMB2_MAX_BUFFER_SIZE;
 191				credits->value = 0;
 192				credits->instance = 0;
 193				break;
 194			}
 195
 196			/* leave some credits for reopen and other ops */
 197			scredits -= 8;
 198			*num = min_t(unsigned int, size,
 199				     scredits * SMB2_MAX_BUFFER_SIZE);
 200
 201			credits->value =
 202				DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 203			credits->instance = server->reconnect_instance;
 204			server->credits -= credits->value;
 205			server->in_flight++;
 206			if (server->in_flight > server->max_in_flight)
 207				server->max_in_flight = server->in_flight;
 208			break;
 209		}
 210	}
 
 
 211	spin_unlock(&server->req_lock);
 
 
 
 
 
 
 212	return rc;
 213}
 214
 215static int
 216smb2_adjust_credits(struct TCP_Server_Info *server,
 217		    struct cifs_credits *credits,
 218		    const unsigned int payload_size)
 219{
 220	int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 
 221
 222	if (!credits->value || credits->value == new_val)
 223		return 0;
 224
 225	if (credits->value < new_val) {
 226		WARN_ONCE(1, "request has less credits (%d) than required (%d)",
 227			  credits->value, new_val);
 
 
 
 228		return -ENOTSUPP;
 229	}
 230
 231	spin_lock(&server->req_lock);
 232
 233	if (server->reconnect_instance != credits->instance) {
 
 
 234		spin_unlock(&server->req_lock);
 
 
 
 
 235		cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 236			 credits->value - new_val);
 237		return -EAGAIN;
 238	}
 239
 240	server->credits += credits->value - new_val;
 
 
 241	spin_unlock(&server->req_lock);
 242	wake_up(&server->request_q);
 
 
 
 
 
 
 
 243	credits->value = new_val;
 
 244	return 0;
 245}
 246
 247static __u64
 248smb2_get_next_mid(struct TCP_Server_Info *server)
 249{
 250	__u64 mid;
 251	/* for SMB2 we need the current value */
 252	spin_lock(&GlobalMid_Lock);
 253	mid = server->CurrentMid++;
 254	spin_unlock(&GlobalMid_Lock);
 255	return mid;
 256}
 257
 258static void
 259smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 260{
 261	spin_lock(&GlobalMid_Lock);
 262	if (server->CurrentMid >= val)
 263		server->CurrentMid -= val;
 264	spin_unlock(&GlobalMid_Lock);
 265}
 266
 267static struct mid_q_entry *
 268smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 269{
 270	struct mid_q_entry *mid;
 271	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 272	__u64 wire_mid = le64_to_cpu(shdr->MessageId);
 273
 274	if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 275		cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 276		return NULL;
 277	}
 278
 279	spin_lock(&GlobalMid_Lock);
 280	list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 281		if ((mid->mid == wire_mid) &&
 282		    (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 283		    (mid->command == shdr->Command)) {
 284			kref_get(&mid->refcount);
 
 
 
 
 285			spin_unlock(&GlobalMid_Lock);
 286			return mid;
 287		}
 288	}
 289	spin_unlock(&GlobalMid_Lock);
 290	return NULL;
 291}
 292
 
 
 
 
 
 
 
 
 
 
 
 
 293static void
 294smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 295{
 296#ifdef CONFIG_CIFS_DEBUG2
 297	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 298
 299	cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 300		 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 301		 shdr->ProcessId);
 302	cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 303		 server->ops->calc_smb_size(buf, server));
 304#endif
 305}
 306
 307static bool
 308smb2_need_neg(struct TCP_Server_Info *server)
 309{
 310	return server->max_read == 0;
 311}
 312
 313static int
 314smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 315{
 316	int rc;
 317
 318	ses->server->CurrentMid = 0;
 
 
 319	rc = SMB2_negotiate(xid, ses);
 320	/* BB we probably don't need to retry with modern servers */
 321	if (rc == -EAGAIN)
 322		rc = -EHOSTDOWN;
 323	return rc;
 324}
 325
 326static unsigned int
 327smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 328{
 329	struct TCP_Server_Info *server = tcon->ses->server;
 330	unsigned int wsize;
 331
 332	/* start with specified wsize, or default */
 333	wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 334	wsize = min_t(unsigned int, wsize, server->max_write);
 335#ifdef CONFIG_CIFS_SMB_DIRECT
 336	if (server->rdma) {
 337		if (server->sign)
 338			wsize = min_t(unsigned int,
 339				wsize, server->smbd_conn->max_fragmented_send_size);
 340		else
 341			wsize = min_t(unsigned int,
 342				wsize, server->smbd_conn->max_readwrite_size);
 343	}
 344#endif
 345	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 346		wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 347
 348	return wsize;
 349}
 350
 351static unsigned int
 352smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 353{
 354	struct TCP_Server_Info *server = tcon->ses->server;
 355	unsigned int wsize;
 356
 357	/* start with specified wsize, or default */
 358	wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
 359	wsize = min_t(unsigned int, wsize, server->max_write);
 360#ifdef CONFIG_CIFS_SMB_DIRECT
 361	if (server->rdma) {
 362		if (server->sign)
 
 
 
 
 363			wsize = min_t(unsigned int,
 364				wsize, server->smbd_conn->max_fragmented_send_size);
 
 
 
 365		else
 366			wsize = min_t(unsigned int,
 367				wsize, server->smbd_conn->max_readwrite_size);
 368	}
 369#endif
 370	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 371		wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 372
 373	return wsize;
 374}
 375
 376static unsigned int
 377smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 378{
 379	struct TCP_Server_Info *server = tcon->ses->server;
 380	unsigned int rsize;
 381
 382	/* start with specified rsize, or default */
 383	rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 384	rsize = min_t(unsigned int, rsize, server->max_read);
 385#ifdef CONFIG_CIFS_SMB_DIRECT
 386	if (server->rdma) {
 387		if (server->sign)
 388			rsize = min_t(unsigned int,
 389				rsize, server->smbd_conn->max_fragmented_recv_size);
 390		else
 391			rsize = min_t(unsigned int,
 392				rsize, server->smbd_conn->max_readwrite_size);
 393	}
 394#endif
 395
 396	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 397		rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 398
 399	return rsize;
 400}
 401
 402static unsigned int
 403smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 404{
 405	struct TCP_Server_Info *server = tcon->ses->server;
 406	unsigned int rsize;
 407
 408	/* start with specified rsize, or default */
 409	rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
 410	rsize = min_t(unsigned int, rsize, server->max_read);
 411#ifdef CONFIG_CIFS_SMB_DIRECT
 412	if (server->rdma) {
 413		if (server->sign)
 
 
 
 
 414			rsize = min_t(unsigned int,
 415				rsize, server->smbd_conn->max_fragmented_recv_size);
 
 
 
 416		else
 417			rsize = min_t(unsigned int,
 418				rsize, server->smbd_conn->max_readwrite_size);
 419	}
 420#endif
 421
 422	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 423		rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 424
 425	return rsize;
 426}
 427
 428static int
 429parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 430			size_t buf_len,
 431			struct cifs_server_iface **iface_list,
 432			size_t *iface_count)
 433{
 434	struct network_interface_info_ioctl_rsp *p;
 435	struct sockaddr_in *addr4;
 436	struct sockaddr_in6 *addr6;
 437	struct iface_info_ipv4 *p4;
 438	struct iface_info_ipv6 *p6;
 439	struct cifs_server_iface *info;
 440	ssize_t bytes_left;
 441	size_t next = 0;
 442	int nb_iface = 0;
 443	int rc = 0;
 444
 445	*iface_list = NULL;
 446	*iface_count = 0;
 447
 448	/*
 449	 * Fist pass: count and sanity check
 450	 */
 451
 452	bytes_left = buf_len;
 453	p = buf;
 454	while (bytes_left >= sizeof(*p)) {
 455		nb_iface++;
 456		next = le32_to_cpu(p->Next);
 457		if (!next) {
 458			bytes_left -= sizeof(*p);
 459			break;
 460		}
 461		p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 462		bytes_left -= next;
 463	}
 464
 465	if (!nb_iface) {
 466		cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 467		rc = -EINVAL;
 468		goto out;
 469	}
 470
 471	if (bytes_left || p->Next)
 
 472		cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 473
 474
 475	/*
 476	 * Second pass: extract info to internal structure
 477	 */
 478
 479	*iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 480	if (!*iface_list) {
 481		rc = -ENOMEM;
 482		goto out;
 483	}
 484
 485	info = *iface_list;
 486	bytes_left = buf_len;
 487	p = buf;
 488	while (bytes_left >= sizeof(*p)) {
 489		info->speed = le64_to_cpu(p->LinkSpeed);
 490		info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
 491		info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
 492
 493		cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 494		cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 495		cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 496			 le32_to_cpu(p->Capability));
 497
 498		switch (p->Family) {
 499		/*
 500		 * The kernel and wire socket structures have the same
 501		 * layout and use network byte order but make the
 502		 * conversion explicit in case either one changes.
 503		 */
 504		case INTERNETWORK:
 505			addr4 = (struct sockaddr_in *)&info->sockaddr;
 506			p4 = (struct iface_info_ipv4 *)p->Buffer;
 507			addr4->sin_family = AF_INET;
 508			memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 509
 510			/* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 511			addr4->sin_port = cpu_to_be16(CIFS_PORT);
 512
 513			cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 514				 &addr4->sin_addr);
 515			break;
 516		case INTERNETWORKV6:
 517			addr6 =	(struct sockaddr_in6 *)&info->sockaddr;
 518			p6 = (struct iface_info_ipv6 *)p->Buffer;
 519			addr6->sin6_family = AF_INET6;
 520			memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 521
 522			/* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 523			addr6->sin6_flowinfo = 0;
 524			addr6->sin6_scope_id = 0;
 525			addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 526
 527			cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 528				 &addr6->sin6_addr);
 529			break;
 530		default:
 531			cifs_dbg(VFS,
 532				 "%s: skipping unsupported socket family\n",
 533				 __func__);
 534			goto next_iface;
 535		}
 536
 537		(*iface_count)++;
 538		info++;
 539next_iface:
 540		next = le32_to_cpu(p->Next);
 541		if (!next)
 542			break;
 543		p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 544		bytes_left -= next;
 545	}
 546
 547	if (!*iface_count) {
 548		rc = -EINVAL;
 549		goto out;
 550	}
 551
 552out:
 553	if (rc) {
 554		kfree(*iface_list);
 555		*iface_count = 0;
 556		*iface_list = NULL;
 557	}
 558	return rc;
 559}
 560
 
 
 
 
 
 
 
 561
 562static int
 563SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 564{
 565	int rc;
 566	unsigned int ret_data_len = 0;
 567	struct network_interface_info_ioctl_rsp *out_buf = NULL;
 568	struct cifs_server_iface *iface_list;
 569	size_t iface_count;
 570	struct cifs_ses *ses = tcon->ses;
 571
 572	rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 573			FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 574			NULL /* no data input */, 0 /* no data input */,
 575			CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 576	if (rc == -EOPNOTSUPP) {
 577		cifs_dbg(FYI,
 578			 "server does not support query network interfaces\n");
 579		goto out;
 580	} else if (rc != 0) {
 581		cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 582		goto out;
 583	}
 584
 585	rc = parse_server_interfaces(out_buf, ret_data_len,
 586				     &iface_list, &iface_count);
 587	if (rc)
 588		goto out;
 589
 
 
 
 590	spin_lock(&ses->iface_lock);
 591	kfree(ses->iface_list);
 592	ses->iface_list = iface_list;
 593	ses->iface_count = iface_count;
 594	ses->iface_last_update = jiffies;
 595	spin_unlock(&ses->iface_lock);
 596
 597out:
 598	kfree(out_buf);
 599	return rc;
 600}
 601
 602static void
 603smb2_close_cached_fid(struct kref *ref)
 604{
 605	struct cached_fid *cfid = container_of(ref, struct cached_fid,
 606					       refcount);
 607
 608	if (cfid->is_valid) {
 609		cifs_dbg(FYI, "clear cached root file handle\n");
 610		SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 611			   cfid->fid->volatile_fid);
 612		cfid->is_valid = false;
 613		cfid->file_all_info_is_valid = false;
 
 
 
 
 
 
 
 
 
 
 
 614	}
 615}
 616
 617void close_shroot(struct cached_fid *cfid)
 618{
 619	mutex_lock(&cfid->fid_mutex);
 620	kref_put(&cfid->refcount, smb2_close_cached_fid);
 621	mutex_unlock(&cfid->fid_mutex);
 622}
 623
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 624void
 625smb2_cached_lease_break(struct work_struct *work)
 626{
 627	struct cached_fid *cfid = container_of(work,
 628				struct cached_fid, lease_break);
 629
 630	close_shroot(cfid);
 631}
 632
 633/*
 634 * Open the directory at the root of a share
 
 635 */
 636int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
 
 
 
 637{
 638	struct cifs_ses *ses = tcon->ses;
 639	struct TCP_Server_Info *server = ses->server;
 640	struct cifs_open_parms oparms;
 641	struct smb2_create_rsp *o_rsp = NULL;
 642	struct smb2_query_info_rsp *qi_rsp = NULL;
 643	int resp_buftype[2];
 644	struct smb_rqst rqst[2];
 645	struct kvec rsp_iov[2];
 646	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
 647	struct kvec qi_iov[1];
 648	int rc, flags = 0;
 649	__le16 utf16_path = 0; /* Null - since an open of top of share */
 650	u8 oplock = SMB2_OPLOCK_LEVEL_II;
 
 
 
 
 
 
 
 
 
 
 
 
 
 651
 652	mutex_lock(&tcon->crfid.fid_mutex);
 653	if (tcon->crfid.is_valid) {
 654		cifs_dbg(FYI, "found a cached root file handle\n");
 655		memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
 656		kref_get(&tcon->crfid.refcount);
 657		mutex_unlock(&tcon->crfid.fid_mutex);
 658		return 0;
 659	}
 660
 661	/*
 662	 * We do not hold the lock for the open because in case
 663	 * SMB2_open needs to reconnect, it will end up calling
 664	 * cifs_mark_open_files_invalid() which takes the lock again
 665	 * thus causing a deadlock
 666	 */
 667
 668	mutex_unlock(&tcon->crfid.fid_mutex);
 669
 670	if (smb3_encryption_required(tcon))
 671		flags |= CIFS_TRANSFORM_REQ;
 672
 
 
 
 
 
 
 673	memset(rqst, 0, sizeof(rqst));
 674	resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
 675	memset(rsp_iov, 0, sizeof(rsp_iov));
 676
 677	/* Open */
 678	memset(&open_iov, 0, sizeof(open_iov));
 679	rqst[0].rq_iov = open_iov;
 680	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
 681
 682	oparms.tcon = tcon;
 683	oparms.create_options = 0;
 684	oparms.desired_access = FILE_READ_ATTRIBUTES;
 685	oparms.disposition = FILE_OPEN;
 686	oparms.fid = pfid;
 687	oparms.reconnect = false;
 688
 689	rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &utf16_path);
 
 690	if (rc)
 691		goto oshr_free;
 692	smb2_set_next_command(tcon, &rqst[0]);
 693
 694	memset(&qi_iov, 0, sizeof(qi_iov));
 695	rqst[1].rq_iov = qi_iov;
 696	rqst[1].rq_nvec = 1;
 697
 698	rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
 
 699				  COMPOUND_FID, FILE_ALL_INFORMATION,
 700				  SMB2_O_INFO_FILE, 0,
 701				  sizeof(struct smb2_file_all_info) +
 702				  PATH_MAX * 2, 0, NULL);
 703	if (rc)
 704		goto oshr_free;
 705
 706	smb2_set_related(&rqst[1]);
 707
 708	rc = compound_send_recv(xid, ses, flags, 2, rqst,
 
 709				resp_buftype, rsp_iov);
 710	mutex_lock(&tcon->crfid.fid_mutex);
 711
 712	/*
 713	 * Now we need to check again as the cached root might have
 714	 * been successfully re-opened from a concurrent process
 715	 */
 716
 717	if (tcon->crfid.is_valid) {
 718		/* work was already done */
 719
 720		/* stash fids for close() later */
 721		struct cifs_fid fid = {
 722			.persistent_fid = pfid->persistent_fid,
 723			.volatile_fid = pfid->volatile_fid,
 724		};
 725
 726		/*
 727		 * caller expects this func to set pfid to a valid
 728		 * cached root, so we copy the existing one and get a
 729		 * reference.
 730		 */
 731		memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
 732		kref_get(&tcon->crfid.refcount);
 733
 734		mutex_unlock(&tcon->crfid.fid_mutex);
 735
 736		if (rc == 0) {
 737			/* close extra handle outside of crit sec */
 738			SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 739		}
 
 740		goto oshr_free;
 741	}
 742
 743	/* Cached root is still invalid, continue normaly */
 744
 745	if (rc) {
 746		if (rc == -EREMCHG) {
 747			tcon->need_reconnect = true;
 748			printk_once(KERN_WARNING "server share %s deleted\n",
 749				    tcon->treeName);
 750		}
 751		goto oshr_exit;
 752	}
 753
 754	atomic_inc(&tcon->num_remote_opens);
 755
 756	o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
 757	oparms.fid->persistent_fid = o_rsp->PersistentFileId;
 758	oparms.fid->volatile_fid = o_rsp->VolatileFileId;
 759#ifdef CONFIG_CIFS_DEBUG2
 760	oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
 761#endif /* CIFS_DEBUG2 */
 762
 763	memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 764	tcon->crfid.tcon = tcon;
 765	tcon->crfid.is_valid = true;
 
 
 766	kref_init(&tcon->crfid.refcount);
 767
 768	/* BB TBD check to see if oplock level check can be removed below */
 769	if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
 
 
 
 
 770		kref_get(&tcon->crfid.refcount);
 
 771		smb2_parse_contexts(server, o_rsp,
 772				&oparms.fid->epoch,
 773				oparms.fid->lease_key, &oplock, NULL);
 
 774	} else
 775		goto oshr_exit;
 776
 777	qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
 778	if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
 779		goto oshr_exit;
 780	if (!smb2_validate_and_copy_iov(
 781				le16_to_cpu(qi_rsp->OutputBufferOffset),
 782				sizeof(struct smb2_file_all_info),
 783				&rsp_iov[1], sizeof(struct smb2_file_all_info),
 784				(char *)&tcon->crfid.file_all_info))
 785		tcon->crfid.file_all_info_is_valid = 1;
 
 
 786
 787oshr_exit:
 788	mutex_unlock(&tcon->crfid.fid_mutex);
 789oshr_free:
 790	SMB2_open_free(&rqst[0]);
 791	SMB2_query_info_free(&rqst[1]);
 792	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 793	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 
 
 794	return rc;
 795}
 796
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 797static void
 798smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 
 799{
 800	int rc;
 801	__le16 srch_path = 0; /* Null - open root of share */
 802	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 803	struct cifs_open_parms oparms;
 804	struct cifs_fid fid;
 805	bool no_cached_open = tcon->nohandlecache;
 806
 807	oparms.tcon = tcon;
 808	oparms.desired_access = FILE_READ_ATTRIBUTES;
 809	oparms.disposition = FILE_OPEN;
 810	oparms.create_options = 0;
 811	oparms.fid = &fid;
 812	oparms.reconnect = false;
 813
 814	if (no_cached_open)
 815		rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 816			       NULL);
 817	else
 818		rc = open_shroot(xid, tcon, &fid);
 819
 820	if (rc)
 821		return;
 822
 823	SMB3_request_interfaces(xid, tcon);
 824
 825	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 826			FS_ATTRIBUTE_INFORMATION);
 827	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 828			FS_DEVICE_INFORMATION);
 829	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 830			FS_VOLUME_INFORMATION);
 831	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 832			FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 833	if (no_cached_open)
 834		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 835	else
 836		close_shroot(&tcon->crfid);
 837}
 838
 839static void
 840smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 
 841{
 842	int rc;
 843	__le16 srch_path = 0; /* Null - open root of share */
 844	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 845	struct cifs_open_parms oparms;
 846	struct cifs_fid fid;
 847
 848	oparms.tcon = tcon;
 849	oparms.desired_access = FILE_READ_ATTRIBUTES;
 850	oparms.disposition = FILE_OPEN;
 851	oparms.create_options = 0;
 852	oparms.fid = &fid;
 853	oparms.reconnect = false;
 854
 855	rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
 
 856	if (rc)
 857		return;
 858
 859	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 860			FS_ATTRIBUTE_INFORMATION);
 861	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 862			FS_DEVICE_INFORMATION);
 863	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 864}
 865
 866static int
 867smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 868			struct cifs_sb_info *cifs_sb, const char *full_path)
 869{
 870	int rc;
 871	__le16 *utf16_path;
 872	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 873	struct cifs_open_parms oparms;
 874	struct cifs_fid fid;
 875
 876	if ((*full_path == 0) && tcon->crfid.is_valid)
 877		return 0;
 878
 879	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 880	if (!utf16_path)
 881		return -ENOMEM;
 882
 883	oparms.tcon = tcon;
 884	oparms.desired_access = FILE_READ_ATTRIBUTES;
 885	oparms.disposition = FILE_OPEN;
 886	if (backup_cred(cifs_sb))
 887		oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
 888	else
 889		oparms.create_options = 0;
 890	oparms.fid = &fid;
 891	oparms.reconnect = false;
 892
 893	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 
 894	if (rc) {
 895		kfree(utf16_path);
 896		return rc;
 897	}
 898
 899	rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 900	kfree(utf16_path);
 901	return rc;
 902}
 903
 904static int
 905smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 906		  struct cifs_sb_info *cifs_sb, const char *full_path,
 907		  u64 *uniqueid, FILE_ALL_INFO *data)
 908{
 909	*uniqueid = le64_to_cpu(data->IndexNumber);
 910	return 0;
 911}
 912
 913static int
 914smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 915		     struct cifs_fid *fid, FILE_ALL_INFO *data)
 916{
 917	int rc;
 918	struct smb2_file_all_info *smb2_data;
 919
 920	smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 921			    GFP_KERNEL);
 922	if (smb2_data == NULL)
 923		return -ENOMEM;
 924
 925	rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 926			     smb2_data);
 927	if (!rc)
 928		move_smb2_info_to_cifs(data, smb2_data);
 929	kfree(smb2_data);
 930	return rc;
 931}
 932
 933#ifdef CONFIG_CIFS_XATTR
 934static ssize_t
 935move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 936		     struct smb2_file_full_ea_info *src, size_t src_size,
 937		     const unsigned char *ea_name)
 938{
 939	int rc = 0;
 940	unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 941	char *name, *value;
 942	size_t buf_size = dst_size;
 943	size_t name_len, value_len, user_name_len;
 944
 945	while (src_size > 0) {
 946		name = &src->ea_data[0];
 947		name_len = (size_t)src->ea_name_length;
 948		value = &src->ea_data[src->ea_name_length + 1];
 949		value_len = (size_t)le16_to_cpu(src->ea_value_length);
 950
 951		if (name_len == 0)
 952			break;
 953
 954		if (src_size < 8 + name_len + 1 + value_len) {
 955			cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 956			rc = -EIO;
 957			goto out;
 958		}
 959
 960		if (ea_name) {
 961			if (ea_name_len == name_len &&
 962			    memcmp(ea_name, name, name_len) == 0) {
 963				rc = value_len;
 964				if (dst_size == 0)
 965					goto out;
 966				if (dst_size < value_len) {
 967					rc = -ERANGE;
 968					goto out;
 969				}
 970				memcpy(dst, value, value_len);
 971				goto out;
 972			}
 973		} else {
 974			/* 'user.' plus a terminating null */
 975			user_name_len = 5 + 1 + name_len;
 976
 977			if (buf_size == 0) {
 978				/* skip copy - calc size only */
 979				rc += user_name_len;
 980			} else if (dst_size >= user_name_len) {
 981				dst_size -= user_name_len;
 982				memcpy(dst, "user.", 5);
 983				dst += 5;
 984				memcpy(dst, src->ea_data, name_len);
 985				dst += name_len;
 986				*dst = 0;
 987				++dst;
 988				rc += user_name_len;
 989			} else {
 990				/* stop before overrun buffer */
 991				rc = -ERANGE;
 992				break;
 993			}
 994		}
 995
 996		if (!src->next_entry_offset)
 997			break;
 998
 999		if (src_size < le32_to_cpu(src->next_entry_offset)) {
1000			/* stop before overrun buffer */
1001			rc = -ERANGE;
1002			break;
1003		}
1004		src_size -= le32_to_cpu(src->next_entry_offset);
1005		src = (void *)((char *)src +
1006			       le32_to_cpu(src->next_entry_offset));
1007	}
1008
1009	/* didn't find the named attribute */
1010	if (ea_name)
1011		rc = -ENODATA;
1012
1013out:
1014	return (ssize_t)rc;
1015}
1016
1017static ssize_t
1018smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1019	       const unsigned char *path, const unsigned char *ea_name,
1020	       char *ea_data, size_t buf_size,
1021	       struct cifs_sb_info *cifs_sb)
1022{
1023	int rc;
1024	__le16 *utf16_path;
1025	struct kvec rsp_iov = {NULL, 0};
1026	int buftype = CIFS_NO_BUFFER;
1027	struct smb2_query_info_rsp *rsp;
1028	struct smb2_file_full_ea_info *info = NULL;
1029
1030	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1031	if (!utf16_path)
1032		return -ENOMEM;
1033
1034	rc = smb2_query_info_compound(xid, tcon, utf16_path,
1035				      FILE_READ_EA,
1036				      FILE_FULL_EA_INFORMATION,
1037				      SMB2_O_INFO_FILE,
1038				      CIFSMaxBufSize -
1039				      MAX_SMB2_CREATE_RESPONSE_SIZE -
1040				      MAX_SMB2_CLOSE_RESPONSE_SIZE,
1041				      &rsp_iov, &buftype, cifs_sb);
1042	if (rc) {
1043		/*
1044		 * If ea_name is NULL (listxattr) and there are no EAs,
1045		 * return 0 as it's not an error. Otherwise, the specified
1046		 * ea_name was not found.
1047		 */
1048		if (!ea_name && rc == -ENODATA)
1049			rc = 0;
1050		goto qeas_exit;
1051	}
1052
1053	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1054	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1055			       le32_to_cpu(rsp->OutputBufferLength),
1056			       &rsp_iov,
1057			       sizeof(struct smb2_file_full_ea_info));
1058	if (rc)
1059		goto qeas_exit;
1060
1061	info = (struct smb2_file_full_ea_info *)(
1062			le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1063	rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1064			le32_to_cpu(rsp->OutputBufferLength), ea_name);
1065
1066 qeas_exit:
1067	kfree(utf16_path);
1068	free_rsp_buf(buftype, rsp_iov.iov_base);
1069	return rc;
1070}
1071
1072
1073static int
1074smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1075	    const char *path, const char *ea_name, const void *ea_value,
1076	    const __u16 ea_value_len, const struct nls_table *nls_codepage,
1077	    struct cifs_sb_info *cifs_sb)
1078{
1079	struct cifs_ses *ses = tcon->ses;
 
1080	__le16 *utf16_path = NULL;
1081	int ea_name_len = strlen(ea_name);
1082	int flags = 0;
1083	int len;
1084	struct smb_rqst rqst[3];
1085	int resp_buftype[3];
1086	struct kvec rsp_iov[3];
1087	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1088	struct cifs_open_parms oparms;
1089	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1090	struct cifs_fid fid;
1091	struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1092	unsigned int size[1];
1093	void *data[1];
1094	struct smb2_file_full_ea_info *ea = NULL;
1095	struct kvec close_iov[1];
1096	int rc;
 
1097
1098	if (smb3_encryption_required(tcon))
1099		flags |= CIFS_TRANSFORM_REQ;
1100
1101	if (ea_name_len > 255)
1102		return -EINVAL;
1103
1104	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1105	if (!utf16_path)
1106		return -ENOMEM;
1107
1108	memset(rqst, 0, sizeof(rqst));
1109	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1110	memset(rsp_iov, 0, sizeof(rsp_iov));
1111
1112	if (ses->server->ops->query_all_EAs) {
1113		if (!ea_value) {
1114			rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1115							     ea_name, NULL, 0,
1116							     cifs_sb);
1117			if (rc == -ENODATA)
1118				goto sea_exit;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1119		}
1120	}
1121
1122	/* Open */
1123	memset(&open_iov, 0, sizeof(open_iov));
1124	rqst[0].rq_iov = open_iov;
1125	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1126
1127	memset(&oparms, 0, sizeof(oparms));
1128	oparms.tcon = tcon;
1129	oparms.desired_access = FILE_WRITE_EA;
1130	oparms.disposition = FILE_OPEN;
1131	if (backup_cred(cifs_sb))
1132		oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1133	else
1134		oparms.create_options = 0;
1135	oparms.fid = &fid;
1136	oparms.reconnect = false;
1137
1138	rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
 
1139	if (rc)
1140		goto sea_exit;
1141	smb2_set_next_command(tcon, &rqst[0]);
1142
1143
1144	/* Set Info */
1145	memset(&si_iov, 0, sizeof(si_iov));
1146	rqst[1].rq_iov = si_iov;
1147	rqst[1].rq_nvec = 1;
1148
1149	len = sizeof(ea) + ea_name_len + ea_value_len + 1;
1150	ea = kzalloc(len, GFP_KERNEL);
1151	if (ea == NULL) {
1152		rc = -ENOMEM;
1153		goto sea_exit;
1154	}
1155
1156	ea->ea_name_length = ea_name_len;
1157	ea->ea_value_length = cpu_to_le16(ea_value_len);
1158	memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1159	memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1160
1161	size[0] = len;
1162	data[0] = ea;
1163
1164	rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
 
1165				COMPOUND_FID, current->tgid,
1166				FILE_FULL_EA_INFORMATION,
1167				SMB2_O_INFO_FILE, 0, data, size);
1168	smb2_set_next_command(tcon, &rqst[1]);
1169	smb2_set_related(&rqst[1]);
1170
1171
1172	/* Close */
1173	memset(&close_iov, 0, sizeof(close_iov));
1174	rqst[2].rq_iov = close_iov;
1175	rqst[2].rq_nvec = 1;
1176	rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
 
1177	smb2_set_related(&rqst[2]);
1178
1179	rc = compound_send_recv(xid, ses, flags, 3, rqst,
 
1180				resp_buftype, rsp_iov);
1181	/* no need to bump num_remote_opens because handle immediately closed */
1182
1183 sea_exit:
1184	kfree(ea);
1185	kfree(utf16_path);
1186	SMB2_open_free(&rqst[0]);
1187	SMB2_set_info_free(&rqst[1]);
1188	SMB2_close_free(&rqst[2]);
1189	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1190	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1191	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1192	return rc;
1193}
1194#endif
1195
1196static bool
1197smb2_can_echo(struct TCP_Server_Info *server)
1198{
1199	return server->echoes;
1200}
1201
1202static void
1203smb2_clear_stats(struct cifs_tcon *tcon)
1204{
1205	int i;
1206
1207	for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1208		atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1209		atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1210	}
1211}
1212
1213static void
1214smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1215{
1216	seq_puts(m, "\n\tShare Capabilities:");
1217	if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1218		seq_puts(m, " DFS,");
1219	if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1220		seq_puts(m, " CONTINUOUS AVAILABILITY,");
1221	if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1222		seq_puts(m, " SCALEOUT,");
1223	if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1224		seq_puts(m, " CLUSTER,");
1225	if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1226		seq_puts(m, " ASYMMETRIC,");
1227	if (tcon->capabilities == 0)
1228		seq_puts(m, " None");
1229	if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1230		seq_puts(m, " Aligned,");
1231	if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1232		seq_puts(m, " Partition Aligned,");
1233	if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1234		seq_puts(m, " SSD,");
1235	if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1236		seq_puts(m, " TRIM-support,");
1237
1238	seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1239	seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1240	if (tcon->perf_sector_size)
1241		seq_printf(m, "\tOptimal sector size: 0x%x",
1242			   tcon->perf_sector_size);
1243	seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1244}
1245
1246static void
1247smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1248{
1249	atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1250	atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1251
1252	/*
1253	 *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1254	 *  totals (requests sent) since those SMBs are per-session not per tcon
1255	 */
1256	seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1257		   (long long)(tcon->bytes_read),
1258		   (long long)(tcon->bytes_written));
1259	seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1260		   atomic_read(&tcon->num_local_opens),
1261		   atomic_read(&tcon->num_remote_opens));
1262	seq_printf(m, "\nTreeConnects: %d total %d failed",
1263		   atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1264		   atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1265	seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1266		   atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1267		   atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1268	seq_printf(m, "\nCreates: %d total %d failed",
1269		   atomic_read(&sent[SMB2_CREATE_HE]),
1270		   atomic_read(&failed[SMB2_CREATE_HE]));
1271	seq_printf(m, "\nCloses: %d total %d failed",
1272		   atomic_read(&sent[SMB2_CLOSE_HE]),
1273		   atomic_read(&failed[SMB2_CLOSE_HE]));
1274	seq_printf(m, "\nFlushes: %d total %d failed",
1275		   atomic_read(&sent[SMB2_FLUSH_HE]),
1276		   atomic_read(&failed[SMB2_FLUSH_HE]));
1277	seq_printf(m, "\nReads: %d total %d failed",
1278		   atomic_read(&sent[SMB2_READ_HE]),
1279		   atomic_read(&failed[SMB2_READ_HE]));
1280	seq_printf(m, "\nWrites: %d total %d failed",
1281		   atomic_read(&sent[SMB2_WRITE_HE]),
1282		   atomic_read(&failed[SMB2_WRITE_HE]));
1283	seq_printf(m, "\nLocks: %d total %d failed",
1284		   atomic_read(&sent[SMB2_LOCK_HE]),
1285		   atomic_read(&failed[SMB2_LOCK_HE]));
1286	seq_printf(m, "\nIOCTLs: %d total %d failed",
1287		   atomic_read(&sent[SMB2_IOCTL_HE]),
1288		   atomic_read(&failed[SMB2_IOCTL_HE]));
1289	seq_printf(m, "\nQueryDirectories: %d total %d failed",
1290		   atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1291		   atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1292	seq_printf(m, "\nChangeNotifies: %d total %d failed",
1293		   atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1294		   atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1295	seq_printf(m, "\nQueryInfos: %d total %d failed",
1296		   atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1297		   atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1298	seq_printf(m, "\nSetInfos: %d total %d failed",
1299		   atomic_read(&sent[SMB2_SET_INFO_HE]),
1300		   atomic_read(&failed[SMB2_SET_INFO_HE]));
1301	seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1302		   atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1303		   atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1304}
1305
1306static void
1307smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1308{
1309	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1310	struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1311
1312	cfile->fid.persistent_fid = fid->persistent_fid;
1313	cfile->fid.volatile_fid = fid->volatile_fid;
 
1314#ifdef CONFIG_CIFS_DEBUG2
1315	cfile->fid.mid = fid->mid;
1316#endif /* CIFS_DEBUG2 */
1317	server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1318				      &fid->purge_cache);
1319	cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1320	memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1321}
1322
1323static void
1324smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1325		struct cifs_fid *fid)
1326{
1327	SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1328}
1329
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1330static int
1331SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1332		     u64 persistent_fid, u64 volatile_fid,
1333		     struct copychunk_ioctl *pcchunk)
1334{
1335	int rc;
1336	unsigned int ret_data_len;
1337	struct resume_key_req *res_key;
1338
1339	rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1340			FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1341			NULL, 0 /* no input */, CIFSMaxBufSize,
1342			(char **)&res_key, &ret_data_len);
1343
1344	if (rc) {
 
 
 
1345		cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1346		goto req_res_key_exit;
1347	}
1348	if (ret_data_len < sizeof(struct resume_key_req)) {
1349		cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1350		rc = -EINVAL;
1351		goto req_res_key_exit;
1352	}
1353	memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1354
1355req_res_key_exit:
1356	kfree(res_key);
1357	return rc;
1358}
1359
 
 
 
 
 
 
 
 
 
 
1360static int
1361smb2_ioctl_query_info(const unsigned int xid,
1362		      struct cifs_tcon *tcon,
 
1363		      __le16 *path, int is_dir,
1364		      unsigned long p)
1365{
 
 
 
1366	struct cifs_ses *ses = tcon->ses;
 
1367	char __user *arg = (char __user *)p;
1368	struct smb_query_info qi;
1369	struct smb_query_info __user *pqi;
1370	int rc = 0;
1371	int flags = 0;
1372	struct smb2_query_info_rsp *qi_rsp = NULL;
1373	struct smb2_ioctl_rsp *io_rsp = NULL;
1374	void *buffer = NULL;
1375	struct smb_rqst rqst[3];
1376	int resp_buftype[3];
1377	struct kvec rsp_iov[3];
1378	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1379	struct cifs_open_parms oparms;
1380	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1381	struct cifs_fid fid;
1382	struct kvec qi_iov[1];
1383	struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1384	struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1385	struct kvec close_iov[1];
1386	unsigned int size[2];
1387	void *data[2];
 
 
 
 
 
 
 
1388
1389	memset(rqst, 0, sizeof(rqst));
1390	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1391	memset(rsp_iov, 0, sizeof(rsp_iov));
1392
1393	if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1394		return -EFAULT;
1395
1396	if (qi.output_buffer_length > 1024)
 
1397		return -EINVAL;
 
1398
1399	if (!ses || !(ses->server))
 
1400		return -EIO;
 
1401
1402	if (smb3_encryption_required(tcon))
1403		flags |= CIFS_TRANSFORM_REQ;
1404
1405	buffer = kmalloc(qi.output_buffer_length, GFP_KERNEL);
1406	if (buffer == NULL)
1407		return -ENOMEM;
1408
1409	if (copy_from_user(buffer, arg + sizeof(struct smb_query_info),
1410			   qi.output_buffer_length)) {
1411		rc = -EFAULT;
1412		goto iqinf_exit;
1413	}
1414
1415	/* Open */
1416	memset(&open_iov, 0, sizeof(open_iov));
1417	rqst[0].rq_iov = open_iov;
1418	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1419
1420	memset(&oparms, 0, sizeof(oparms));
1421	oparms.tcon = tcon;
1422	oparms.disposition = FILE_OPEN;
1423	if (is_dir)
1424		oparms.create_options = CREATE_NOT_FILE;
1425	else
1426		oparms.create_options = CREATE_NOT_DIR;
1427	oparms.fid = &fid;
1428	oparms.reconnect = false;
1429
1430	if (qi.flags & PASSTHRU_FSCTL) {
1431		switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1432		case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1433			oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1434			break;
1435		case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1436			oparms.desired_access = GENERIC_ALL;
1437			break;
1438		case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1439			oparms.desired_access = GENERIC_READ;
1440			break;
1441		case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1442			oparms.desired_access = GENERIC_WRITE;
1443			break;
1444		}
1445	} else if (qi.flags & PASSTHRU_SET_INFO) {
1446		oparms.desired_access = GENERIC_WRITE;
1447	} else {
1448		oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1449	}
1450
1451	rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
 
1452	if (rc)
1453		goto iqinf_exit;
1454	smb2_set_next_command(tcon, &rqst[0]);
1455
1456	/* Query */
1457	if (qi.flags & PASSTHRU_FSCTL) {
1458		/* Can eventually relax perm check since server enforces too */
1459		if (!capable(CAP_SYS_ADMIN))
1460			rc = -EPERM;
1461		else  {
1462			memset(&io_iov, 0, sizeof(io_iov));
1463			rqst[1].rq_iov = io_iov;
1464			rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1465
1466			rc = SMB2_ioctl_init(tcon, &rqst[1],
 
1467					     COMPOUND_FID, COMPOUND_FID,
1468					     qi.info_type, true, buffer,
1469					     qi.output_buffer_length,
1470					     CIFSMaxBufSize);
 
 
1471		}
1472	} else if (qi.flags == PASSTHRU_SET_INFO) {
1473		/* Can eventually relax perm check since server enforces too */
1474		if (!capable(CAP_SYS_ADMIN))
1475			rc = -EPERM;
1476		else  {
1477			memset(&si_iov, 0, sizeof(si_iov));
1478			rqst[1].rq_iov = si_iov;
1479			rqst[1].rq_nvec = 1;
1480
1481			size[0] = 8;
1482			data[0] = buffer;
1483
1484			rc = SMB2_set_info_init(tcon, &rqst[1],
 
1485					COMPOUND_FID, COMPOUND_FID,
1486					current->tgid,
1487					FILE_END_OF_FILE_INFORMATION,
1488					SMB2_O_INFO_FILE, 0, data, size);
1489		}
1490	} else if (qi.flags == PASSTHRU_QUERY_INFO) {
1491		memset(&qi_iov, 0, sizeof(qi_iov));
1492		rqst[1].rq_iov = qi_iov;
1493		rqst[1].rq_nvec = 1;
1494
1495		rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
 
1496				  COMPOUND_FID, qi.file_info_class,
1497				  qi.info_type, qi.additional_information,
1498				  qi.input_buffer_length,
1499				  qi.output_buffer_length, buffer);
1500	} else { /* unknown flags */
1501		cifs_tcon_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
 
1502		rc = -EINVAL;
1503	}
1504
1505	if (rc)
1506		goto iqinf_exit;
1507	smb2_set_next_command(tcon, &rqst[1]);
1508	smb2_set_related(&rqst[1]);
1509
1510	/* Close */
1511	memset(&close_iov, 0, sizeof(close_iov));
1512	rqst[2].rq_iov = close_iov;
1513	rqst[2].rq_nvec = 1;
1514
1515	rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
 
1516	if (rc)
1517		goto iqinf_exit;
1518	smb2_set_related(&rqst[2]);
1519
1520	rc = compound_send_recv(xid, ses, flags, 3, rqst,
 
1521				resp_buftype, rsp_iov);
1522	if (rc)
1523		goto iqinf_exit;
1524
1525	/* No need to bump num_remote_opens since handle immediately closed */
1526	if (qi.flags & PASSTHRU_FSCTL) {
1527		pqi = (struct smb_query_info __user *)arg;
1528		io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1529		if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1530			qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1531		if (qi.input_buffer_length > 0 &&
1532		    le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length > rsp_iov[1].iov_len) {
1533			rc = -EFAULT;
1534			goto iqinf_exit;
1535		}
1536		if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
1537				 sizeof(qi.input_buffer_length))) {
1538			rc = -EFAULT;
1539			goto iqinf_exit;
1540		}
1541		if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1542				 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1543				 qi.input_buffer_length)) {
1544			rc = -EFAULT;
1545			goto iqinf_exit;
1546		}
1547	} else {
1548		pqi = (struct smb_query_info __user *)arg;
1549		qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1550		if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1551			qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1552		if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
1553				 sizeof(qi.input_buffer_length))) {
1554			rc = -EFAULT;
1555			goto iqinf_exit;
1556		}
1557		if (copy_to_user(pqi + 1, qi_rsp->Buffer, qi.input_buffer_length)) {
1558			rc = -EFAULT;
1559			goto iqinf_exit;
1560		}
1561	}
1562
1563 iqinf_exit:
1564	kfree(buffer);
1565	SMB2_open_free(&rqst[0]);
1566	if (qi.flags & PASSTHRU_FSCTL)
1567		SMB2_ioctl_free(&rqst[1]);
1568	else
1569		SMB2_query_info_free(&rqst[1]);
1570
1571	SMB2_close_free(&rqst[2]);
1572	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1573	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1574	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 
 
1575	return rc;
 
 
 
 
1576}
1577
1578static ssize_t
1579smb2_copychunk_range(const unsigned int xid,
1580			struct cifsFileInfo *srcfile,
1581			struct cifsFileInfo *trgtfile, u64 src_off,
1582			u64 len, u64 dest_off)
1583{
1584	int rc;
1585	unsigned int ret_data_len;
1586	struct copychunk_ioctl *pcchunk;
1587	struct copychunk_ioctl_rsp *retbuf = NULL;
1588	struct cifs_tcon *tcon;
1589	int chunks_copied = 0;
1590	bool chunk_sizes_updated = false;
1591	ssize_t bytes_written, total_bytes_written = 0;
1592
1593	pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1594
1595	if (pcchunk == NULL)
1596		return -ENOMEM;
1597
1598	cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1599	/* Request a key from the server to identify the source of the copy */
1600	rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1601				srcfile->fid.persistent_fid,
1602				srcfile->fid.volatile_fid, pcchunk);
1603
1604	/* Note: request_res_key sets res_key null only if rc !=0 */
1605	if (rc)
1606		goto cchunk_out;
1607
1608	/* For now array only one chunk long, will make more flexible later */
1609	pcchunk->ChunkCount = cpu_to_le32(1);
1610	pcchunk->Reserved = 0;
1611	pcchunk->Reserved2 = 0;
1612
1613	tcon = tlink_tcon(trgtfile->tlink);
1614
1615	while (len > 0) {
1616		pcchunk->SourceOffset = cpu_to_le64(src_off);
1617		pcchunk->TargetOffset = cpu_to_le64(dest_off);
1618		pcchunk->Length =
1619			cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1620
1621		/* Request server copy to target from src identified by key */
 
 
1622		rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1623			trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1624			true /* is_fsctl */, (char *)pcchunk,
1625			sizeof(struct copychunk_ioctl),	CIFSMaxBufSize,
1626			(char **)&retbuf, &ret_data_len);
1627		if (rc == 0) {
1628			if (ret_data_len !=
1629					sizeof(struct copychunk_ioctl_rsp)) {
1630				cifs_tcon_dbg(VFS, "invalid cchunk response size\n");
1631				rc = -EIO;
1632				goto cchunk_out;
1633			}
1634			if (retbuf->TotalBytesWritten == 0) {
1635				cifs_dbg(FYI, "no bytes copied\n");
1636				rc = -EIO;
1637				goto cchunk_out;
1638			}
1639			/*
1640			 * Check if server claimed to write more than we asked
1641			 */
1642			if (le32_to_cpu(retbuf->TotalBytesWritten) >
1643			    le32_to_cpu(pcchunk->Length)) {
1644				cifs_tcon_dbg(VFS, "invalid copy chunk response\n");
1645				rc = -EIO;
1646				goto cchunk_out;
1647			}
1648			if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1649				cifs_tcon_dbg(VFS, "invalid num chunks written\n");
1650				rc = -EIO;
1651				goto cchunk_out;
1652			}
1653			chunks_copied++;
1654
1655			bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1656			src_off += bytes_written;
1657			dest_off += bytes_written;
1658			len -= bytes_written;
1659			total_bytes_written += bytes_written;
1660
1661			cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1662				le32_to_cpu(retbuf->ChunksWritten),
1663				le32_to_cpu(retbuf->ChunkBytesWritten),
1664				bytes_written);
1665		} else if (rc == -EINVAL) {
1666			if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1667				goto cchunk_out;
1668
1669			cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1670				le32_to_cpu(retbuf->ChunksWritten),
1671				le32_to_cpu(retbuf->ChunkBytesWritten),
1672				le32_to_cpu(retbuf->TotalBytesWritten));
1673
1674			/*
1675			 * Check if this is the first request using these sizes,
1676			 * (ie check if copy succeed once with original sizes
1677			 * and check if the server gave us different sizes after
1678			 * we already updated max sizes on previous request).
1679			 * if not then why is the server returning an error now
1680			 */
1681			if ((chunks_copied != 0) || chunk_sizes_updated)
1682				goto cchunk_out;
1683
1684			/* Check that server is not asking us to grow size */
1685			if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1686					tcon->max_bytes_chunk)
1687				tcon->max_bytes_chunk =
1688					le32_to_cpu(retbuf->ChunkBytesWritten);
1689			else
1690				goto cchunk_out; /* server gave us bogus size */
1691
1692			/* No need to change MaxChunks since already set to 1 */
1693			chunk_sizes_updated = true;
1694		} else
1695			goto cchunk_out;
1696	}
1697
1698cchunk_out:
1699	kfree(pcchunk);
1700	kfree(retbuf);
1701	if (rc)
1702		return rc;
1703	else
1704		return total_bytes_written;
1705}
1706
1707static int
1708smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1709		struct cifs_fid *fid)
1710{
1711	return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1712}
1713
1714static unsigned int
1715smb2_read_data_offset(char *buf)
1716{
1717	struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1718
1719	return rsp->DataOffset;
1720}
1721
1722static unsigned int
1723smb2_read_data_length(char *buf, bool in_remaining)
1724{
1725	struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1726
1727	if (in_remaining)
1728		return le32_to_cpu(rsp->DataRemaining);
1729
1730	return le32_to_cpu(rsp->DataLength);
1731}
1732
1733
1734static int
1735smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1736	       struct cifs_io_parms *parms, unsigned int *bytes_read,
1737	       char **buf, int *buf_type)
1738{
1739	parms->persistent_fid = pfid->persistent_fid;
1740	parms->volatile_fid = pfid->volatile_fid;
1741	return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1742}
1743
1744static int
1745smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1746		struct cifs_io_parms *parms, unsigned int *written,
1747		struct kvec *iov, unsigned long nr_segs)
1748{
1749
1750	parms->persistent_fid = pfid->persistent_fid;
1751	parms->volatile_fid = pfid->volatile_fid;
1752	return SMB2_write(xid, parms, written, iov, nr_segs);
1753}
1754
1755/* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1756static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1757		struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1758{
1759	struct cifsInodeInfo *cifsi;
1760	int rc;
1761
1762	cifsi = CIFS_I(inode);
1763
1764	/* if file already sparse don't bother setting sparse again */
1765	if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1766		return true; /* already sparse */
1767
1768	if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1769		return true; /* already not sparse */
1770
1771	/*
1772	 * Can't check for sparse support on share the usual way via the
1773	 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1774	 * since Samba server doesn't set the flag on the share, yet
1775	 * supports the set sparse FSCTL and returns sparse correctly
1776	 * in the file attributes. If we fail setting sparse though we
1777	 * mark that server does not support sparse files for this share
1778	 * to avoid repeatedly sending the unsupported fsctl to server
1779	 * if the file is repeatedly extended.
1780	 */
1781	if (tcon->broken_sparse_sup)
1782		return false;
1783
1784	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1785			cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1786			true /* is_fctl */,
1787			&setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1788	if (rc) {
1789		tcon->broken_sparse_sup = true;
1790		cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1791		return false;
1792	}
1793
1794	if (setsparse)
1795		cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1796	else
1797		cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1798
1799	return true;
1800}
1801
1802static int
1803smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1804		   struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1805{
1806	__le64 eof = cpu_to_le64(size);
1807	struct inode *inode;
1808
1809	/*
1810	 * If extending file more than one page make sparse. Many Linux fs
1811	 * make files sparse by default when extending via ftruncate
1812	 */
1813	inode = d_inode(cfile->dentry);
1814
1815	if (!set_alloc && (size > inode->i_size + 8192)) {
1816		__u8 set_sparse = 1;
1817
1818		/* whether set sparse succeeds or not, extend the file */
1819		smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1820	}
1821
1822	return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1823			    cfile->fid.volatile_fid, cfile->pid, &eof);
1824}
1825
1826static int
1827smb2_duplicate_extents(const unsigned int xid,
1828			struct cifsFileInfo *srcfile,
1829			struct cifsFileInfo *trgtfile, u64 src_off,
1830			u64 len, u64 dest_off)
1831{
1832	int rc;
1833	unsigned int ret_data_len;
 
1834	struct duplicate_extents_to_file dup_ext_buf;
1835	struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1836
1837	/* server fileays advertise duplicate extent support with this flag */
1838	if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1839	     FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1840		return -EOPNOTSUPP;
1841
1842	dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1843	dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1844	dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1845	dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1846	dup_ext_buf.ByteCount = cpu_to_le64(len);
1847	cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1848		src_off, dest_off, len);
1849
1850	rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1851	if (rc)
1852		goto duplicate_extents_out;
 
 
1853
 
 
 
 
 
 
 
 
 
1854	rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1855			trgtfile->fid.volatile_fid,
1856			FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1857			true /* is_fsctl */,
1858			(char *)&dup_ext_buf,
1859			sizeof(struct duplicate_extents_to_file),
1860			CIFSMaxBufSize, NULL,
1861			&ret_data_len);
1862
1863	if (ret_data_len > 0)
1864		cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1865
1866duplicate_extents_out:
1867	return rc;
1868}
1869
1870static int
1871smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1872		   struct cifsFileInfo *cfile)
1873{
1874	return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1875			    cfile->fid.volatile_fid);
1876}
1877
1878static int
1879smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1880		   struct cifsFileInfo *cfile)
1881{
1882	struct fsctl_set_integrity_information_req integr_info;
1883	unsigned int ret_data_len;
1884
1885	integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1886	integr_info.Flags = 0;
1887	integr_info.Reserved = 0;
1888
1889	return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1890			cfile->fid.volatile_fid,
1891			FSCTL_SET_INTEGRITY_INFORMATION,
1892			true /* is_fsctl */,
1893			(char *)&integr_info,
1894			sizeof(struct fsctl_set_integrity_information_req),
1895			CIFSMaxBufSize, NULL,
1896			&ret_data_len);
1897
1898}
1899
1900/* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1901#define GMT_TOKEN_SIZE 50
1902
1903#define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1904
1905/*
1906 * Input buffer contains (empty) struct smb_snapshot array with size filled in
1907 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1908 */
1909static int
1910smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1911		   struct cifsFileInfo *cfile, void __user *ioc_buf)
1912{
1913	char *retbuf = NULL;
1914	unsigned int ret_data_len = 0;
1915	int rc;
1916	u32 max_response_size;
1917	struct smb_snapshot_array snapshot_in;
1918
1919	/*
1920	 * On the first query to enumerate the list of snapshots available
1921	 * for this volume the buffer begins with 0 (number of snapshots
1922	 * which can be returned is zero since at that point we do not know
1923	 * how big the buffer needs to be). On the second query,
1924	 * it (ret_data_len) is set to number of snapshots so we can
1925	 * know to set the maximum response size larger (see below).
1926	 */
1927	if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
1928		return -EFAULT;
1929
1930	/*
1931	 * Note that for snapshot queries that servers like Azure expect that
1932	 * the first query be minimal size (and just used to get the number/size
1933	 * of previous versions) so response size must be specified as EXACTLY
1934	 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
1935	 * of eight bytes.
1936	 */
1937	if (ret_data_len == 0)
1938		max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
1939	else
1940		max_response_size = CIFSMaxBufSize;
1941
1942	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1943			cfile->fid.volatile_fid,
1944			FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1945			true /* is_fsctl */,
1946			NULL, 0 /* no input data */, max_response_size,
1947			(char **)&retbuf,
1948			&ret_data_len);
1949	cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1950			rc, ret_data_len);
1951	if (rc)
1952		return rc;
1953
1954	if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1955		/* Fixup buffer */
1956		if (copy_from_user(&snapshot_in, ioc_buf,
1957		    sizeof(struct smb_snapshot_array))) {
1958			rc = -EFAULT;
1959			kfree(retbuf);
1960			return rc;
1961		}
1962
1963		/*
1964		 * Check for min size, ie not large enough to fit even one GMT
1965		 * token (snapshot).  On the first ioctl some users may pass in
1966		 * smaller size (or zero) to simply get the size of the array
1967		 * so the user space caller can allocate sufficient memory
1968		 * and retry the ioctl again with larger array size sufficient
1969		 * to hold all of the snapshot GMT tokens on the second try.
1970		 */
1971		if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
1972			ret_data_len = sizeof(struct smb_snapshot_array);
1973
1974		/*
1975		 * We return struct SRV_SNAPSHOT_ARRAY, followed by
1976		 * the snapshot array (of 50 byte GMT tokens) each
1977		 * representing an available previous version of the data
1978		 */
1979		if (ret_data_len > (snapshot_in.snapshot_array_size +
1980					sizeof(struct smb_snapshot_array)))
1981			ret_data_len = snapshot_in.snapshot_array_size +
1982					sizeof(struct smb_snapshot_array);
1983
1984		if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1985			rc = -EFAULT;
1986	}
1987
1988	kfree(retbuf);
1989	return rc;
1990}
1991
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1992static int
1993smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1994		     const char *path, struct cifs_sb_info *cifs_sb,
1995		     struct cifs_fid *fid, __u16 search_flags,
1996		     struct cifs_search_info *srch_inf)
1997{
1998	__le16 *utf16_path;
1999	int rc;
2000	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 
 
 
 
 
2001	struct cifs_open_parms oparms;
 
 
 
 
2002
2003	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2004	if (!utf16_path)
2005		return -ENOMEM;
2006
 
 
 
 
 
 
 
 
 
 
 
 
2007	oparms.tcon = tcon;
2008	oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2009	oparms.disposition = FILE_OPEN;
2010	if (backup_cred(cifs_sb))
2011		oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2012	else
2013		oparms.create_options = 0;
2014	oparms.fid = fid;
2015	oparms.reconnect = false;
2016
2017	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2018	kfree(utf16_path);
2019	if (rc) {
2020		cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
2021		return rc;
2022	}
2023
 
2024	srch_inf->entries_in_buffer = 0;
2025	srch_inf->index_of_last_entry = 2;
2026
2027	rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
2028				  fid->volatile_fid, 0, srch_inf);
2029	if (rc) {
2030		cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2031		SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 
 
 
 
2032	}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2033	return rc;
2034}
2035
2036static int
2037smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2038		    struct cifs_fid *fid, __u16 search_flags,
2039		    struct cifs_search_info *srch_inf)
2040{
2041	return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2042				    fid->volatile_fid, 0, srch_inf);
2043}
2044
2045static int
2046smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2047	       struct cifs_fid *fid)
2048{
2049	return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2050}
2051
2052/*
2053 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2054 * the number of credits and return true. Otherwise - return false.
2055 */
2056static bool
2057smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2058{
2059	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 
2060
2061	if (shdr->Status != STATUS_PENDING)
2062		return false;
2063
2064	if (shdr->CreditRequest) {
2065		spin_lock(&server->req_lock);
2066		server->credits += le16_to_cpu(shdr->CreditRequest);
 
 
2067		spin_unlock(&server->req_lock);
2068		wake_up(&server->request_q);
 
 
 
 
 
 
2069	}
2070
2071	return true;
2072}
2073
2074static bool
2075smb2_is_session_expired(char *buf)
2076{
2077	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2078
2079	if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2080	    shdr->Status != STATUS_USER_SESSION_DELETED)
2081		return false;
2082
2083	trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2084			       le16_to_cpu(shdr->Command),
2085			       le64_to_cpu(shdr->MessageId));
2086	cifs_dbg(FYI, "Session expired or deleted\n");
2087
2088	return true;
2089}
2090
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2091static int
2092smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2093		     struct cifsInodeInfo *cinode)
2094{
2095	if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2096		return SMB2_lease_break(0, tcon, cinode->lease_key,
2097					smb2_get_lease_state(cinode));
2098
2099	return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2100				 fid->volatile_fid,
2101				 CIFS_CACHE_READ(cinode) ? 1 : 0);
2102}
2103
2104void
2105smb2_set_related(struct smb_rqst *rqst)
2106{
2107	struct smb2_sync_hdr *shdr;
2108
2109	shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2110	if (shdr == NULL) {
2111		cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2112		return;
2113	}
2114	shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2115}
2116
2117char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2118
2119void
2120smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2121{
2122	struct smb2_sync_hdr *shdr;
2123	struct cifs_ses *ses = tcon->ses;
2124	struct TCP_Server_Info *server = ses->server;
2125	unsigned long len = smb_rqst_len(server, rqst);
2126	int i, num_padding;
2127
2128	shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2129	if (shdr == NULL) {
2130		cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2131		return;
2132	}
2133
2134	/* SMB headers in a compound are 8 byte aligned. */
2135
2136	/* No padding needed */
2137	if (!(len & 7))
2138		goto finished;
2139
2140	num_padding = 8 - (len & 7);
2141	if (!smb3_encryption_required(tcon)) {
2142		/*
2143		 * If we do not have encryption then we can just add an extra
2144		 * iov for the padding.
2145		 */
2146		rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2147		rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2148		rqst->rq_nvec++;
2149		len += num_padding;
2150	} else {
2151		/*
2152		 * We can not add a small padding iov for the encryption case
2153		 * because the encryption framework can not handle the padding
2154		 * iovs.
2155		 * We have to flatten this into a single buffer and add
2156		 * the padding to it.
2157		 */
2158		for (i = 1; i < rqst->rq_nvec; i++) {
2159			memcpy(rqst->rq_iov[0].iov_base +
2160			       rqst->rq_iov[0].iov_len,
2161			       rqst->rq_iov[i].iov_base,
2162			       rqst->rq_iov[i].iov_len);
2163			rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2164		}
2165		memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2166		       0, num_padding);
2167		rqst->rq_iov[0].iov_len += num_padding;
2168		len += num_padding;
2169		rqst->rq_nvec = 1;
2170	}
2171
2172 finished:
2173	shdr->NextCommand = cpu_to_le32(len);
2174}
2175
2176/*
2177 * Passes the query info response back to the caller on success.
2178 * Caller need to free this with free_rsp_buf().
2179 */
2180int
2181smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2182			 __le16 *utf16_path, u32 desired_access,
2183			 u32 class, u32 type, u32 output_len,
2184			 struct kvec *rsp, int *buftype,
2185			 struct cifs_sb_info *cifs_sb)
2186{
2187	struct cifs_ses *ses = tcon->ses;
2188	int flags = 0;
 
2189	struct smb_rqst rqst[3];
2190	int resp_buftype[3];
2191	struct kvec rsp_iov[3];
2192	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2193	struct kvec qi_iov[1];
2194	struct kvec close_iov[1];
2195	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2196	struct cifs_open_parms oparms;
2197	struct cifs_fid fid;
2198	int rc;
2199
2200	if (smb3_encryption_required(tcon))
2201		flags |= CIFS_TRANSFORM_REQ;
2202
2203	memset(rqst, 0, sizeof(rqst));
2204	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2205	memset(rsp_iov, 0, sizeof(rsp_iov));
2206
2207	memset(&open_iov, 0, sizeof(open_iov));
2208	rqst[0].rq_iov = open_iov;
2209	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2210
2211	oparms.tcon = tcon;
2212	oparms.desired_access = desired_access;
2213	oparms.disposition = FILE_OPEN;
2214	if (cifs_sb && backup_cred(cifs_sb))
2215		oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2216	else
2217		oparms.create_options = 0;
2218	oparms.fid = &fid;
2219	oparms.reconnect = false;
2220
2221	rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
 
2222	if (rc)
2223		goto qic_exit;
2224	smb2_set_next_command(tcon, &rqst[0]);
2225
2226	memset(&qi_iov, 0, sizeof(qi_iov));
2227	rqst[1].rq_iov = qi_iov;
2228	rqst[1].rq_nvec = 1;
2229
2230	rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
 
2231				  class, type, 0,
2232				  output_len, 0,
2233				  NULL);
2234	if (rc)
2235		goto qic_exit;
2236	smb2_set_next_command(tcon, &rqst[1]);
2237	smb2_set_related(&rqst[1]);
2238
2239	memset(&close_iov, 0, sizeof(close_iov));
2240	rqst[2].rq_iov = close_iov;
2241	rqst[2].rq_nvec = 1;
2242
2243	rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
 
2244	if (rc)
2245		goto qic_exit;
2246	smb2_set_related(&rqst[2]);
2247
2248	rc = compound_send_recv(xid, ses, flags, 3, rqst,
 
2249				resp_buftype, rsp_iov);
2250	if (rc) {
2251		free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2252		if (rc == -EREMCHG) {
2253			tcon->need_reconnect = true;
2254			printk_once(KERN_WARNING "server share %s deleted\n",
2255				    tcon->treeName);
2256		}
2257		goto qic_exit;
2258	}
2259	*rsp = rsp_iov[1];
2260	*buftype = resp_buftype[1];
2261
2262 qic_exit:
2263	SMB2_open_free(&rqst[0]);
2264	SMB2_query_info_free(&rqst[1]);
2265	SMB2_close_free(&rqst[2]);
2266	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2267	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2268	return rc;
2269}
2270
2271static int
2272smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2273	     struct kstatfs *buf)
2274{
2275	struct smb2_query_info_rsp *rsp;
2276	struct smb2_fs_full_size_info *info = NULL;
2277	__le16 utf16_path = 0; /* Null - open root of share */
2278	struct kvec rsp_iov = {NULL, 0};
2279	int buftype = CIFS_NO_BUFFER;
2280	int rc;
2281
2282
2283	rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2284				      FILE_READ_ATTRIBUTES,
2285				      FS_FULL_SIZE_INFORMATION,
2286				      SMB2_O_INFO_FILESYSTEM,
2287				      sizeof(struct smb2_fs_full_size_info),
2288				      &rsp_iov, &buftype, NULL);
2289	if (rc)
2290		goto qfs_exit;
2291
2292	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2293	buf->f_type = SMB2_MAGIC_NUMBER;
2294	info = (struct smb2_fs_full_size_info *)(
2295		le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2296	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2297			       le32_to_cpu(rsp->OutputBufferLength),
2298			       &rsp_iov,
2299			       sizeof(struct smb2_fs_full_size_info));
2300	if (!rc)
2301		smb2_copy_fs_info_to_kstatfs(info, buf);
2302
2303qfs_exit:
2304	free_rsp_buf(buftype, rsp_iov.iov_base);
2305	return rc;
2306}
2307
2308static int
2309smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2310	     struct kstatfs *buf)
2311{
2312	int rc;
2313	__le16 srch_path = 0; /* Null - open root of share */
2314	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2315	struct cifs_open_parms oparms;
2316	struct cifs_fid fid;
2317
2318	if (!tcon->posix_extensions)
2319		return smb2_queryfs(xid, tcon, buf);
2320
2321	oparms.tcon = tcon;
2322	oparms.desired_access = FILE_READ_ATTRIBUTES;
2323	oparms.disposition = FILE_OPEN;
2324	oparms.create_options = 0;
2325	oparms.fid = &fid;
2326	oparms.reconnect = false;
2327
2328	rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
 
2329	if (rc)
2330		return rc;
2331
2332	rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2333				   fid.volatile_fid, buf);
2334	buf->f_type = SMB2_MAGIC_NUMBER;
2335	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2336	return rc;
2337}
2338
2339static bool
2340smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2341{
2342	return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2343	       ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2344}
2345
2346static int
2347smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2348	       __u64 length, __u32 type, int lock, int unlock, bool wait)
2349{
2350	if (unlock && !lock)
2351		type = SMB2_LOCKFLAG_UNLOCK;
2352	return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2353			 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2354			 current->tgid, length, offset, type, wait);
2355}
2356
2357static void
2358smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2359{
2360	memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2361}
2362
2363static void
2364smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2365{
2366	memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2367}
2368
2369static void
2370smb2_new_lease_key(struct cifs_fid *fid)
2371{
2372	generate_random_uuid(fid->lease_key);
2373}
2374
2375static int
2376smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2377		   const char *search_name,
2378		   struct dfs_info3_param **target_nodes,
2379		   unsigned int *num_of_nodes,
2380		   const struct nls_table *nls_codepage, int remap)
2381{
2382	int rc;
2383	__le16 *utf16_path = NULL;
2384	int utf16_path_len = 0;
2385	struct cifs_tcon *tcon;
2386	struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2387	struct get_dfs_referral_rsp *dfs_rsp = NULL;
2388	u32 dfs_req_size = 0, dfs_rsp_size = 0;
2389
2390	cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2391
2392	/*
2393	 * Try to use the IPC tcon, otherwise just use any
2394	 */
2395	tcon = ses->tcon_ipc;
2396	if (tcon == NULL) {
2397		spin_lock(&cifs_tcp_ses_lock);
2398		tcon = list_first_entry_or_null(&ses->tcon_list,
2399						struct cifs_tcon,
2400						tcon_list);
2401		if (tcon)
2402			tcon->tc_count++;
2403		spin_unlock(&cifs_tcp_ses_lock);
2404	}
2405
2406	if (tcon == NULL) {
2407		cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2408			 ses);
2409		rc = -ENOTCONN;
2410		goto out;
2411	}
2412
2413	utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2414					   &utf16_path_len,
2415					   nls_codepage, remap);
2416	if (!utf16_path) {
2417		rc = -ENOMEM;
2418		goto out;
2419	}
2420
2421	dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2422	dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2423	if (!dfs_req) {
2424		rc = -ENOMEM;
2425		goto out;
2426	}
2427
2428	/* Highest DFS referral version understood */
2429	dfs_req->MaxReferralLevel = DFS_VERSION;
2430
2431	/* Path to resolve in an UTF-16 null-terminated string */
2432	memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2433
2434	do {
2435		rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2436				FSCTL_DFS_GET_REFERRALS,
2437				true /* is_fsctl */,
2438				(char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2439				(char **)&dfs_rsp, &dfs_rsp_size);
2440	} while (rc == -EAGAIN);
2441
2442	if (rc) {
2443		if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2444			cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2445		goto out;
2446	}
2447
2448	rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2449				 num_of_nodes, target_nodes,
2450				 nls_codepage, remap, search_name,
2451				 true /* is_unicode */);
2452	if (rc) {
2453		cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2454		goto out;
2455	}
2456
2457 out:
2458	if (tcon && !tcon->ipc) {
2459		/* ipc tcons are not refcounted */
2460		spin_lock(&cifs_tcp_ses_lock);
2461		tcon->tc_count--;
 
 
2462		spin_unlock(&cifs_tcp_ses_lock);
2463	}
2464	kfree(utf16_path);
2465	kfree(dfs_req);
2466	kfree(dfs_rsp);
2467	return rc;
2468}
2469
2470static int
2471parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2472		      u32 plen, char **target_path,
2473		      struct cifs_sb_info *cifs_sb)
2474{
2475	unsigned int len;
2476
2477	/* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2478	len = le16_to_cpu(symlink_buf->ReparseDataLength);
2479
2480	if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2481		cifs_dbg(VFS, "%lld not a supported symlink type\n",
2482			le64_to_cpu(symlink_buf->InodeType));
2483		return -EOPNOTSUPP;
2484	}
2485
2486	*target_path = cifs_strndup_from_utf16(
2487				symlink_buf->PathBuffer,
2488				len, true, cifs_sb->local_nls);
2489	if (!(*target_path))
2490		return -ENOMEM;
2491
2492	convert_delimiter(*target_path, '/');
2493	cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2494
2495	return 0;
2496}
2497
2498static int
2499parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2500		      u32 plen, char **target_path,
2501		      struct cifs_sb_info *cifs_sb)
2502{
2503	unsigned int sub_len;
2504	unsigned int sub_offset;
2505
2506	/* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2507
2508	sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2509	sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2510	if (sub_offset + 20 > plen ||
2511	    sub_offset + sub_len + 20 > plen) {
2512		cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2513		return -EIO;
2514	}
2515
2516	*target_path = cifs_strndup_from_utf16(
2517				symlink_buf->PathBuffer + sub_offset,
2518				sub_len, true, cifs_sb->local_nls);
2519	if (!(*target_path))
2520		return -ENOMEM;
2521
2522	convert_delimiter(*target_path, '/');
2523	cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2524
2525	return 0;
2526}
2527
2528static int
2529parse_reparse_point(struct reparse_data_buffer *buf,
2530		    u32 plen, char **target_path,
2531		    struct cifs_sb_info *cifs_sb)
2532{
2533	if (plen < sizeof(struct reparse_data_buffer)) {
2534		cifs_dbg(VFS, "reparse buffer is too small. Must be "
2535			 "at least 8 bytes but was %d\n", plen);
2536		return -EIO;
2537	}
2538
2539	if (plen < le16_to_cpu(buf->ReparseDataLength) +
2540	    sizeof(struct reparse_data_buffer)) {
2541		cifs_dbg(VFS, "srv returned invalid reparse buf "
2542			 "length: %d\n", plen);
2543		return -EIO;
2544	}
2545
2546	/* See MS-FSCC 2.1.2 */
2547	switch (le32_to_cpu(buf->ReparseTag)) {
2548	case IO_REPARSE_TAG_NFS:
2549		return parse_reparse_posix(
2550			(struct reparse_posix_data *)buf,
2551			plen, target_path, cifs_sb);
2552	case IO_REPARSE_TAG_SYMLINK:
2553		return parse_reparse_symlink(
2554			(struct reparse_symlink_data_buffer *)buf,
2555			plen, target_path, cifs_sb);
2556	default:
2557		cifs_dbg(VFS, "srv returned unknown symlink buffer "
2558			 "tag:0x%08x\n", le32_to_cpu(buf->ReparseTag));
2559		return -EOPNOTSUPP;
2560	}
2561}
2562
2563#define SMB2_SYMLINK_STRUCT_SIZE \
2564	(sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2565
2566static int
2567smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2568		   struct cifs_sb_info *cifs_sb, const char *full_path,
2569		   char **target_path, bool is_reparse_point)
2570{
2571	int rc;
2572	__le16 *utf16_path = NULL;
2573	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2574	struct cifs_open_parms oparms;
2575	struct cifs_fid fid;
2576	struct kvec err_iov = {NULL, 0};
2577	struct smb2_err_rsp *err_buf = NULL;
2578	struct smb2_symlink_err_rsp *symlink;
 
2579	unsigned int sub_len;
2580	unsigned int sub_offset;
2581	unsigned int print_len;
2582	unsigned int print_offset;
2583	int flags = 0;
2584	struct smb_rqst rqst[3];
2585	int resp_buftype[3];
2586	struct kvec rsp_iov[3];
2587	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2588	struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2589	struct kvec close_iov[1];
2590	struct smb2_create_rsp *create_rsp;
2591	struct smb2_ioctl_rsp *ioctl_rsp;
2592	struct reparse_data_buffer *reparse_buf;
 
2593	u32 plen;
2594
2595	cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2596
2597	*target_path = NULL;
2598
2599	if (smb3_encryption_required(tcon))
2600		flags |= CIFS_TRANSFORM_REQ;
2601
2602	memset(rqst, 0, sizeof(rqst));
2603	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2604	memset(rsp_iov, 0, sizeof(rsp_iov));
2605
2606	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2607	if (!utf16_path)
2608		return -ENOMEM;
2609
2610	/* Open */
2611	memset(&open_iov, 0, sizeof(open_iov));
2612	rqst[0].rq_iov = open_iov;
2613	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2614
2615	memset(&oparms, 0, sizeof(oparms));
2616	oparms.tcon = tcon;
2617	oparms.desired_access = FILE_READ_ATTRIBUTES;
2618	oparms.disposition = FILE_OPEN;
2619
2620	if (backup_cred(cifs_sb))
2621		oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2622	else
2623		oparms.create_options = 0;
2624	if (is_reparse_point)
2625		oparms.create_options = OPEN_REPARSE_POINT;
2626
2627	oparms.fid = &fid;
2628	oparms.reconnect = false;
2629
2630	rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
 
2631	if (rc)
2632		goto querty_exit;
2633	smb2_set_next_command(tcon, &rqst[0]);
2634
2635
2636	/* IOCTL */
2637	memset(&io_iov, 0, sizeof(io_iov));
2638	rqst[1].rq_iov = io_iov;
2639	rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2640
2641	rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid,
 
2642			     fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
2643			     true /* is_fctl */, NULL, 0, CIFSMaxBufSize);
 
 
 
2644	if (rc)
2645		goto querty_exit;
2646
2647	smb2_set_next_command(tcon, &rqst[1]);
2648	smb2_set_related(&rqst[1]);
2649
2650
2651	/* Close */
2652	memset(&close_iov, 0, sizeof(close_iov));
2653	rqst[2].rq_iov = close_iov;
2654	rqst[2].rq_nvec = 1;
2655
2656	rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
 
2657	if (rc)
2658		goto querty_exit;
2659
2660	smb2_set_related(&rqst[2]);
2661
2662	rc = compound_send_recv(xid, tcon->ses, flags, 3, rqst,
 
2663				resp_buftype, rsp_iov);
2664
2665	create_rsp = rsp_iov[0].iov_base;
2666	if (create_rsp && create_rsp->sync_hdr.Status)
2667		err_iov = rsp_iov[0];
2668	ioctl_rsp = rsp_iov[1].iov_base;
2669
2670	/*
2671	 * Open was successful and we got an ioctl response.
2672	 */
2673	if ((rc == 0) && (is_reparse_point)) {
2674		/* See MS-FSCC 2.3.23 */
2675
2676		reparse_buf = (struct reparse_data_buffer *)
2677			((char *)ioctl_rsp +
2678			 le32_to_cpu(ioctl_rsp->OutputOffset));
2679		plen = le32_to_cpu(ioctl_rsp->OutputCount);
2680
2681		if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
2682		    rsp_iov[1].iov_len) {
2683			cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
2684				 plen);
2685			rc = -EIO;
2686			goto querty_exit;
2687		}
2688
2689		rc = parse_reparse_point(reparse_buf, plen, target_path,
2690					 cifs_sb);
2691		goto querty_exit;
2692	}
2693
2694	if (!rc || !err_iov.iov_base) {
2695		rc = -ENOENT;
2696		goto querty_exit;
2697	}
2698
2699	err_buf = err_iov.iov_base;
2700	if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
2701	    err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
2702		rc = -EINVAL;
2703		goto querty_exit;
2704	}
2705
2706	symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2707	if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
2708	    le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
2709		rc = -EINVAL;
2710		goto querty_exit;
2711	}
2712
2713	/* open must fail on symlink - reset rc */
2714	rc = 0;
2715	sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2716	sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
2717	print_len = le16_to_cpu(symlink->PrintNameLength);
2718	print_offset = le16_to_cpu(symlink->PrintNameOffset);
2719
2720	if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
2721		rc = -EINVAL;
2722		goto querty_exit;
2723	}
2724
2725	if (err_iov.iov_len <
2726	    SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
2727		rc = -EINVAL;
2728		goto querty_exit;
2729	}
2730
2731	*target_path = cifs_strndup_from_utf16(
2732				(char *)symlink->PathBuffer + sub_offset,
2733				sub_len, true, cifs_sb->local_nls);
2734	if (!(*target_path)) {
2735		rc = -ENOMEM;
2736		goto querty_exit;
2737	}
2738	convert_delimiter(*target_path, '/');
2739	cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2740
2741 querty_exit:
2742	cifs_dbg(FYI, "query symlink rc %d\n", rc);
2743	kfree(utf16_path);
2744	SMB2_open_free(&rqst[0]);
2745	SMB2_ioctl_free(&rqst[1]);
2746	SMB2_close_free(&rqst[2]);
2747	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2748	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2749	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2750	return rc;
2751}
2752
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2753static struct cifs_ntsd *
2754get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2755		const struct cifs_fid *cifsfid, u32 *pacllen)
2756{
2757	struct cifs_ntsd *pntsd = NULL;
2758	unsigned int xid;
2759	int rc = -EOPNOTSUPP;
2760	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2761
2762	if (IS_ERR(tlink))
2763		return ERR_CAST(tlink);
2764
2765	xid = get_xid();
2766	cifs_dbg(FYI, "trying to get acl\n");
2767
2768	rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2769			    cifsfid->volatile_fid, (void **)&pntsd, pacllen);
 
2770	free_xid(xid);
2771
2772	cifs_put_tlink(tlink);
2773
2774	cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2775	if (rc)
2776		return ERR_PTR(rc);
2777	return pntsd;
2778
2779}
2780
2781static struct cifs_ntsd *
2782get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2783		const char *path, u32 *pacllen)
2784{
2785	struct cifs_ntsd *pntsd = NULL;
2786	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2787	unsigned int xid;
2788	int rc;
2789	struct cifs_tcon *tcon;
2790	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2791	struct cifs_fid fid;
2792	struct cifs_open_parms oparms;
2793	__le16 *utf16_path;
2794
2795	cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
2796	if (IS_ERR(tlink))
2797		return ERR_CAST(tlink);
2798
2799	tcon = tlink_tcon(tlink);
2800	xid = get_xid();
2801
2802	if (backup_cred(cifs_sb))
2803		oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2804	else
2805		oparms.create_options = 0;
2806
2807	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2808	if (!utf16_path) {
2809		rc = -ENOMEM;
2810		free_xid(xid);
2811		return ERR_PTR(rc);
2812	}
2813
2814	oparms.tcon = tcon;
2815	oparms.desired_access = READ_CONTROL;
2816	oparms.disposition = FILE_OPEN;
 
 
 
 
 
 
2817	oparms.fid = &fid;
2818	oparms.reconnect = false;
2819
2820	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 
 
 
 
2821	kfree(utf16_path);
2822	if (!rc) {
2823		rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2824			    fid.volatile_fid, (void **)&pntsd, pacllen);
 
2825		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2826	}
2827
2828	cifs_put_tlink(tlink);
2829	free_xid(xid);
2830
2831	cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2832	if (rc)
2833		return ERR_PTR(rc);
2834	return pntsd;
2835}
2836
2837static int
2838set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
2839		struct inode *inode, const char *path, int aclflag)
2840{
2841	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2842	unsigned int xid;
2843	int rc, access_flags = 0;
2844	struct cifs_tcon *tcon;
2845	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2846	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2847	struct cifs_fid fid;
2848	struct cifs_open_parms oparms;
2849	__le16 *utf16_path;
2850
2851	cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
2852	if (IS_ERR(tlink))
2853		return PTR_ERR(tlink);
2854
2855	tcon = tlink_tcon(tlink);
2856	xid = get_xid();
2857
2858	if (backup_cred(cifs_sb))
2859		oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2860	else
2861		oparms.create_options = 0;
2862
2863	if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
2864		access_flags = WRITE_OWNER;
2865	else
2866		access_flags = WRITE_DAC;
2867
2868	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2869	if (!utf16_path) {
2870		rc = -ENOMEM;
2871		free_xid(xid);
2872		return rc;
2873	}
2874
2875	oparms.tcon = tcon;
2876	oparms.desired_access = access_flags;
 
2877	oparms.disposition = FILE_OPEN;
2878	oparms.path = path;
2879	oparms.fid = &fid;
2880	oparms.reconnect = false;
2881
2882	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 
2883	kfree(utf16_path);
2884	if (!rc) {
2885		rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2886			    fid.volatile_fid, pnntsd, acllen, aclflag);
2887		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2888	}
2889
2890	cifs_put_tlink(tlink);
2891	free_xid(xid);
2892	return rc;
2893}
2894
2895/* Retrieve an ACL from the server */
2896static struct cifs_ntsd *
2897get_smb2_acl(struct cifs_sb_info *cifs_sb,
2898				      struct inode *inode, const char *path,
2899				      u32 *pacllen)
2900{
2901	struct cifs_ntsd *pntsd = NULL;
2902	struct cifsFileInfo *open_file = NULL;
2903
2904	if (inode)
2905		open_file = find_readable_file(CIFS_I(inode), true);
2906	if (!open_file)
2907		return get_smb2_acl_by_path(cifs_sb, path, pacllen);
2908
2909	pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
2910	cifsFileInfo_put(open_file);
2911	return pntsd;
2912}
2913
2914static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
2915			    loff_t offset, loff_t len, bool keep_size)
2916{
2917	struct cifs_ses *ses = tcon->ses;
2918	struct inode *inode;
2919	struct cifsInodeInfo *cifsi;
2920	struct cifsFileInfo *cfile = file->private_data;
2921	struct file_zero_data_information fsctl_buf;
2922	long rc;
2923	unsigned int xid;
2924	__le64 eof;
2925
2926	xid = get_xid();
2927
2928	inode = d_inode(cfile->dentry);
2929	cifsi = CIFS_I(inode);
2930
2931	trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
2932			      ses->Suid, offset, len);
2933
 
 
 
 
 
2934
2935	/* if file not oplocked can't be sure whether asking to extend size */
2936	if (!CIFS_CACHE_READ(cifsi))
2937		if (keep_size == false) {
2938			rc = -EOPNOTSUPP;
2939			trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
2940				tcon->tid, ses->Suid, offset, len, rc);
2941			free_xid(xid);
2942			return rc;
2943		}
2944
2945	cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
2946
2947	fsctl_buf.FileOffset = cpu_to_le64(offset);
2948	fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2949
2950	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2951			cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
2952			(char *)&fsctl_buf,
2953			sizeof(struct file_zero_data_information),
2954			0, NULL, NULL);
2955	if (rc)
2956		goto zero_range_exit;
2957
2958	/*
2959	 * do we also need to change the size of the file?
2960	 */
2961	if (keep_size == false && i_size_read(inode) < offset + len) {
2962		eof = cpu_to_le64(offset + len);
2963		rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
2964				  cfile->fid.volatile_fid, cfile->pid, &eof);
2965	}
2966
2967 zero_range_exit:
2968	free_xid(xid);
2969	if (rc)
2970		trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
2971			      ses->Suid, offset, len, rc);
2972	else
2973		trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
2974			      ses->Suid, offset, len);
2975	return rc;
2976}
2977
2978static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
2979			    loff_t offset, loff_t len)
2980{
2981	struct inode *inode;
2982	struct cifsFileInfo *cfile = file->private_data;
2983	struct file_zero_data_information fsctl_buf;
2984	long rc;
2985	unsigned int xid;
2986	__u8 set_sparse = 1;
2987
2988	xid = get_xid();
2989
2990	inode = d_inode(cfile->dentry);
2991
2992	/* Need to make file sparse, if not already, before freeing range. */
2993	/* Consider adding equivalent for compressed since it could also work */
2994	if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
2995		rc = -EOPNOTSUPP;
2996		free_xid(xid);
2997		return rc;
2998	}
2999
 
 
 
 
 
 
3000	cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3001
3002	fsctl_buf.FileOffset = cpu_to_le64(offset);
3003	fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3004
3005	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3006			cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3007			true /* is_fctl */, (char *)&fsctl_buf,
3008			sizeof(struct file_zero_data_information),
3009			CIFSMaxBufSize, NULL, NULL);
3010	free_xid(xid);
3011	return rc;
3012}
3013
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3014static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3015			    loff_t off, loff_t len, bool keep_size)
3016{
3017	struct inode *inode;
3018	struct cifsInodeInfo *cifsi;
3019	struct cifsFileInfo *cfile = file->private_data;
3020	long rc = -EOPNOTSUPP;
3021	unsigned int xid;
3022	__le64 eof;
3023
3024	xid = get_xid();
3025
3026	inode = d_inode(cfile->dentry);
3027	cifsi = CIFS_I(inode);
3028
3029	trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3030				tcon->ses->Suid, off, len);
3031	/* if file not oplocked can't be sure whether asking to extend size */
3032	if (!CIFS_CACHE_READ(cifsi))
3033		if (keep_size == false) {
3034			trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3035				tcon->tid, tcon->ses->Suid, off, len, rc);
3036			free_xid(xid);
3037			return rc;
3038		}
3039
3040	/*
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3041	 * Files are non-sparse by default so falloc may be a no-op
3042	 * Must check if file sparse. If not sparse, and not extending
3043	 * then no need to do anything since file already allocated
3044	 */
3045	if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3046		if (keep_size == true)
3047			rc = 0;
3048		/* check if extending file */
3049		else if (i_size_read(inode) >= off + len)
3050			/* not extending file and already not sparse */
 
 
 
 
 
3051			rc = 0;
3052		/* BB: in future add else clause to extend file */
3053		else
3054			rc = -EOPNOTSUPP;
3055		if (rc)
3056			trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3057				tcon->tid, tcon->ses->Suid, off, len, rc);
3058		else
3059			trace_smb3_falloc_done(xid, cfile->fid.persistent_fid,
3060				tcon->tid, tcon->ses->Suid, off, len);
3061		free_xid(xid);
3062		return rc;
3063	}
3064
3065	if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3066		/*
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3067		 * Check if falloc starts within first few pages of file
3068		 * and ends within a few pages of the end of file to
3069		 * ensure that most of file is being forced to be
3070		 * fallocated now. If so then setting whole file sparse
3071		 * ie potentially making a few extra pages at the beginning
3072		 * or end of the file non-sparse via set_sparse is harmless.
3073		 */
3074		if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3075			rc = -EOPNOTSUPP;
3076			trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3077				tcon->tid, tcon->ses->Suid, off, len, rc);
3078			free_xid(xid);
3079			return rc;
3080		}
3081
3082		smb2_set_sparse(xid, tcon, cfile, inode, false);
3083		rc = 0;
3084	} else {
3085		smb2_set_sparse(xid, tcon, cfile, inode, false);
3086		rc = 0;
3087		if (i_size_read(inode) < off + len) {
3088			eof = cpu_to_le64(off + len);
3089			rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3090					  cfile->fid.volatile_fid, cfile->pid,
3091					  &eof);
3092		}
3093	}
3094
 
 
 
 
3095	if (rc)
3096		trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3097				tcon->ses->Suid, off, len, rc);
3098	else
3099		trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3100				tcon->ses->Suid, off, len);
3101
3102	free_xid(xid);
3103	return rc;
3104}
3105
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3106static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3107{
3108	struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3109	struct cifsInodeInfo *cifsi;
3110	struct inode *inode;
3111	int rc = 0;
3112	struct file_allocated_range_buffer in_data, *out_data = NULL;
3113	u32 out_data_len;
3114	unsigned int xid;
3115
3116	if (whence != SEEK_HOLE && whence != SEEK_DATA)
3117		return generic_file_llseek(file, offset, whence);
3118
3119	inode = d_inode(cfile->dentry);
3120	cifsi = CIFS_I(inode);
3121
3122	if (offset < 0 || offset >= i_size_read(inode))
3123		return -ENXIO;
3124
3125	xid = get_xid();
3126	/*
3127	 * We need to be sure that all dirty pages are written as they
3128	 * might fill holes on the server.
3129	 * Note that we also MUST flush any written pages since at least
3130	 * some servers (Windows2016) will not reflect recent writes in
3131	 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3132	 */
3133	wrcfile = find_writable_file(cifsi, false);
3134	if (wrcfile) {
3135		filemap_write_and_wait(inode->i_mapping);
3136		smb2_flush_file(xid, tcon, &wrcfile->fid);
3137		cifsFileInfo_put(wrcfile);
3138	}
3139
3140	if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3141		if (whence == SEEK_HOLE)
3142			offset = i_size_read(inode);
3143		goto lseek_exit;
3144	}
3145
3146	in_data.file_offset = cpu_to_le64(offset);
3147	in_data.length = cpu_to_le64(i_size_read(inode));
3148
3149	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3150			cfile->fid.volatile_fid,
3151			FSCTL_QUERY_ALLOCATED_RANGES, true,
3152			(char *)&in_data, sizeof(in_data),
3153			sizeof(struct file_allocated_range_buffer),
3154			(char **)&out_data, &out_data_len);
3155	if (rc == -E2BIG)
3156		rc = 0;
3157	if (rc)
3158		goto lseek_exit;
3159
3160	if (whence == SEEK_HOLE && out_data_len == 0)
3161		goto lseek_exit;
3162
3163	if (whence == SEEK_DATA && out_data_len == 0) {
3164		rc = -ENXIO;
3165		goto lseek_exit;
3166	}
3167
3168	if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3169		rc = -EINVAL;
3170		goto lseek_exit;
3171	}
3172	if (whence == SEEK_DATA) {
3173		offset = le64_to_cpu(out_data->file_offset);
3174		goto lseek_exit;
3175	}
3176	if (offset < le64_to_cpu(out_data->file_offset))
3177		goto lseek_exit;
3178
3179	offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3180
3181 lseek_exit:
3182	free_xid(xid);
3183	kfree(out_data);
3184	if (!rc)
3185		return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3186	else
3187		return rc;
3188}
3189
3190static int smb3_fiemap(struct cifs_tcon *tcon,
3191		       struct cifsFileInfo *cfile,
3192		       struct fiemap_extent_info *fei, u64 start, u64 len)
3193{
3194	unsigned int xid;
3195	struct file_allocated_range_buffer in_data, *out_data;
3196	u32 out_data_len;
3197	int i, num, rc, flags, last_blob;
3198	u64 next;
3199
3200	if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC))
3201		return -EBADR;
 
3202
3203	xid = get_xid();
3204 again:
3205	in_data.file_offset = cpu_to_le64(start);
3206	in_data.length = cpu_to_le64(len);
3207
3208	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3209			cfile->fid.volatile_fid,
3210			FSCTL_QUERY_ALLOCATED_RANGES, true,
3211			(char *)&in_data, sizeof(in_data),
3212			1024 * sizeof(struct file_allocated_range_buffer),
3213			(char **)&out_data, &out_data_len);
3214	if (rc == -E2BIG) {
3215		last_blob = 0;
3216		rc = 0;
3217	} else
3218		last_blob = 1;
3219	if (rc)
3220		goto out;
3221
3222	if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3223		rc = -EINVAL;
3224		goto out;
3225	}
3226	if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3227		rc = -EINVAL;
3228		goto out;
3229	}
3230
3231	num = out_data_len / sizeof(struct file_allocated_range_buffer);
3232	for (i = 0; i < num; i++) {
3233		flags = 0;
3234		if (i == num - 1 && last_blob)
3235			flags |= FIEMAP_EXTENT_LAST;
3236
3237		rc = fiemap_fill_next_extent(fei,
3238				le64_to_cpu(out_data[i].file_offset),
3239				le64_to_cpu(out_data[i].file_offset),
3240				le64_to_cpu(out_data[i].length),
3241				flags);
3242		if (rc < 0)
3243			goto out;
3244		if (rc == 1) {
3245			rc = 0;
3246			goto out;
3247		}
3248	}
3249
3250	if (!last_blob) {
3251		next = le64_to_cpu(out_data[num - 1].file_offset) +
3252		  le64_to_cpu(out_data[num - 1].length);
3253		len = len - (next - start);
3254		start = next;
3255		goto again;
3256	}
3257
3258 out:
3259	free_xid(xid);
3260	kfree(out_data);
3261	return rc;
3262}
3263
3264static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3265			   loff_t off, loff_t len)
3266{
3267	/* KEEP_SIZE already checked for by do_fallocate */
3268	if (mode & FALLOC_FL_PUNCH_HOLE)
3269		return smb3_punch_hole(file, tcon, off, len);
3270	else if (mode & FALLOC_FL_ZERO_RANGE) {
3271		if (mode & FALLOC_FL_KEEP_SIZE)
3272			return smb3_zero_range(file, tcon, off, len, true);
3273		return smb3_zero_range(file, tcon, off, len, false);
3274	} else if (mode == FALLOC_FL_KEEP_SIZE)
3275		return smb3_simple_falloc(file, tcon, off, len, true);
 
 
 
 
3276	else if (mode == 0)
3277		return smb3_simple_falloc(file, tcon, off, len, false);
3278
3279	return -EOPNOTSUPP;
3280}
3281
3282static void
3283smb2_downgrade_oplock(struct TCP_Server_Info *server,
3284			struct cifsInodeInfo *cinode, bool set_level2)
 
3285{
3286	if (set_level2)
3287		server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
3288						0, NULL);
3289	else
3290		server->ops->set_oplock_level(cinode, 0, 0, NULL);
3291}
3292
3293static void
3294smb21_downgrade_oplock(struct TCP_Server_Info *server,
3295		       struct cifsInodeInfo *cinode, bool set_level2)
 
 
 
 
 
3296{
3297	server->ops->set_oplock_level(cinode,
3298				      set_level2 ? SMB2_LEASE_READ_CACHING_HE :
3299				      0, 0, NULL);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3300}
3301
3302static void
3303smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3304		      unsigned int epoch, bool *purge_cache)
3305{
3306	oplock &= 0xFF;
 
3307	if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3308		return;
3309	if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3310		cinode->oplock = CIFS_CACHE_RHW_FLG;
3311		cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3312			 &cinode->vfs_inode);
3313	} else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3314		cinode->oplock = CIFS_CACHE_RW_FLG;
3315		cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3316			 &cinode->vfs_inode);
3317	} else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3318		cinode->oplock = CIFS_CACHE_READ_FLG;
3319		cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3320			 &cinode->vfs_inode);
3321	} else
3322		cinode->oplock = 0;
3323}
3324
3325static void
3326smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3327		       unsigned int epoch, bool *purge_cache)
3328{
3329	char message[5] = {0};
3330	unsigned int new_oplock = 0;
3331
3332	oplock &= 0xFF;
 
3333	if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3334		return;
3335
3336	/* Check if the server granted an oplock rather than a lease */
3337	if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3338		return smb2_set_oplock_level(cinode, oplock, epoch,
3339					     purge_cache);
3340
3341	if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3342		new_oplock |= CIFS_CACHE_READ_FLG;
3343		strcat(message, "R");
3344	}
3345	if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3346		new_oplock |= CIFS_CACHE_HANDLE_FLG;
3347		strcat(message, "H");
3348	}
3349	if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3350		new_oplock |= CIFS_CACHE_WRITE_FLG;
3351		strcat(message, "W");
3352	}
3353	if (!new_oplock)
3354		strncpy(message, "None", sizeof(message));
3355
3356	cinode->oplock = new_oplock;
3357	cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3358		 &cinode->vfs_inode);
3359}
3360
3361static void
3362smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3363		      unsigned int epoch, bool *purge_cache)
3364{
3365	unsigned int old_oplock = cinode->oplock;
3366
3367	smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3368
3369	if (purge_cache) {
3370		*purge_cache = false;
3371		if (old_oplock == CIFS_CACHE_READ_FLG) {
3372			if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3373			    (epoch - cinode->epoch > 0))
3374				*purge_cache = true;
3375			else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3376				 (epoch - cinode->epoch > 1))
3377				*purge_cache = true;
3378			else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3379				 (epoch - cinode->epoch > 1))
3380				*purge_cache = true;
3381			else if (cinode->oplock == 0 &&
3382				 (epoch - cinode->epoch > 0))
3383				*purge_cache = true;
3384		} else if (old_oplock == CIFS_CACHE_RH_FLG) {
3385			if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3386			    (epoch - cinode->epoch > 0))
3387				*purge_cache = true;
3388			else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3389				 (epoch - cinode->epoch > 1))
3390				*purge_cache = true;
3391		}
3392		cinode->epoch = epoch;
3393	}
3394}
3395
3396static bool
3397smb2_is_read_op(__u32 oplock)
3398{
3399	return oplock == SMB2_OPLOCK_LEVEL_II;
3400}
3401
3402static bool
3403smb21_is_read_op(__u32 oplock)
3404{
3405	return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3406	       !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3407}
3408
3409static __le32
3410map_oplock_to_lease(u8 oplock)
3411{
3412	if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3413		return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
3414	else if (oplock == SMB2_OPLOCK_LEVEL_II)
3415		return SMB2_LEASE_READ_CACHING;
3416	else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3417		return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
3418		       SMB2_LEASE_WRITE_CACHING;
3419	return 0;
3420}
3421
3422static char *
3423smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3424{
3425	struct create_lease *buf;
3426
3427	buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3428	if (!buf)
3429		return NULL;
3430
3431	memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3432	buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3433
3434	buf->ccontext.DataOffset = cpu_to_le16(offsetof
3435					(struct create_lease, lcontext));
3436	buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
3437	buf->ccontext.NameOffset = cpu_to_le16(offsetof
3438				(struct create_lease, Name));
3439	buf->ccontext.NameLength = cpu_to_le16(4);
3440	/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3441	buf->Name[0] = 'R';
3442	buf->Name[1] = 'q';
3443	buf->Name[2] = 'L';
3444	buf->Name[3] = 's';
3445	return (char *)buf;
3446}
3447
3448static char *
3449smb3_create_lease_buf(u8 *lease_key, u8 oplock)
3450{
3451	struct create_lease_v2 *buf;
3452
3453	buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
3454	if (!buf)
3455		return NULL;
3456
3457	memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3458	buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3459
3460	buf->ccontext.DataOffset = cpu_to_le16(offsetof
3461					(struct create_lease_v2, lcontext));
3462	buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
3463	buf->ccontext.NameOffset = cpu_to_le16(offsetof
3464				(struct create_lease_v2, Name));
3465	buf->ccontext.NameLength = cpu_to_le16(4);
3466	/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3467	buf->Name[0] = 'R';
3468	buf->Name[1] = 'q';
3469	buf->Name[2] = 'L';
3470	buf->Name[3] = 's';
3471	return (char *)buf;
3472}
3473
3474static __u8
3475smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3476{
3477	struct create_lease *lc = (struct create_lease *)buf;
3478
3479	*epoch = 0; /* not used */
3480	if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3481		return SMB2_OPLOCK_LEVEL_NOCHANGE;
3482	return le32_to_cpu(lc->lcontext.LeaseState);
3483}
3484
3485static __u8
3486smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3487{
3488	struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
3489
3490	*epoch = le16_to_cpu(lc->lcontext.Epoch);
3491	if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3492		return SMB2_OPLOCK_LEVEL_NOCHANGE;
3493	if (lease_key)
3494		memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
3495	return le32_to_cpu(lc->lcontext.LeaseState);
3496}
3497
3498static unsigned int
3499smb2_wp_retry_size(struct inode *inode)
3500{
3501	return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
3502		     SMB2_MAX_BUFFER_SIZE);
3503}
3504
3505static bool
3506smb2_dir_needs_close(struct cifsFileInfo *cfile)
3507{
3508	return !cfile->invalidHandle;
3509}
3510
3511static void
3512fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
3513		   struct smb_rqst *old_rq, __le16 cipher_type)
3514{
3515	struct smb2_sync_hdr *shdr =
3516			(struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
3517
3518	memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
3519	tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
3520	tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
3521	tr_hdr->Flags = cpu_to_le16(0x01);
3522	if (cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3523		get_random_bytes(&tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
 
3524	else
3525		get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3526	memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
3527}
3528
3529/* We can not use the normal sg_set_buf() as we will sometimes pass a
3530 * stack object as buf.
3531 */
3532static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
3533				   unsigned int buflen)
3534{
3535	void *addr;
3536	/*
3537	 * VMAP_STACK (at least) puts stack into the vmalloc address space
3538	 */
3539	if (is_vmalloc_addr(buf))
3540		addr = vmalloc_to_page(buf);
3541	else
3542		addr = virt_to_page(buf);
3543	sg_set_page(sg, addr, buflen, offset_in_page(buf));
3544}
3545
3546/* Assumes the first rqst has a transform header as the first iov.
3547 * I.e.
3548 * rqst[0].rq_iov[0]  is transform header
3549 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
3550 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
3551 */
3552static struct scatterlist *
3553init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
3554{
3555	unsigned int sg_len;
3556	struct scatterlist *sg;
3557	unsigned int i;
3558	unsigned int j;
3559	unsigned int idx = 0;
3560	int skip;
3561
3562	sg_len = 1;
3563	for (i = 0; i < num_rqst; i++)
3564		sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
3565
3566	sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
3567	if (!sg)
3568		return NULL;
3569
3570	sg_init_table(sg, sg_len);
3571	for (i = 0; i < num_rqst; i++) {
3572		for (j = 0; j < rqst[i].rq_nvec; j++) {
3573			/*
3574			 * The first rqst has a transform header where the
3575			 * first 20 bytes are not part of the encrypted blob
3576			 */
3577			skip = (i == 0) && (j == 0) ? 20 : 0;
3578			smb2_sg_set_buf(&sg[idx++],
3579					rqst[i].rq_iov[j].iov_base + skip,
3580					rqst[i].rq_iov[j].iov_len - skip);
3581			}
3582
3583		for (j = 0; j < rqst[i].rq_npages; j++) {
3584			unsigned int len, offset;
3585
3586			rqst_page_get_length(&rqst[i], j, &len, &offset);
3587			sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
3588		}
3589	}
3590	smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
3591	return sg;
3592}
3593
3594static int
3595smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
3596{
3597	struct cifs_ses *ses;
3598	u8 *ses_enc_key;
3599
3600	spin_lock(&cifs_tcp_ses_lock);
3601	list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3602		if (ses->Suid != ses_id)
3603			continue;
3604		ses_enc_key = enc ? ses->smb3encryptionkey :
3605							ses->smb3decryptionkey;
3606		memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
3607		spin_unlock(&cifs_tcp_ses_lock);
3608		return 0;
 
 
3609	}
3610	spin_unlock(&cifs_tcp_ses_lock);
3611
3612	return 1;
3613}
3614/*
3615 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
3616 * iov[0]   - transform header (associate data),
3617 * iov[1-N] - SMB2 header and pages - data to encrypt.
3618 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
3619 * untouched.
3620 */
3621static int
3622crypt_message(struct TCP_Server_Info *server, int num_rqst,
3623	      struct smb_rqst *rqst, int enc)
3624{
3625	struct smb2_transform_hdr *tr_hdr =
3626		(struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
3627	unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
3628	int rc = 0;
3629	struct scatterlist *sg;
3630	u8 sign[SMB2_SIGNATURE_SIZE] = {};
3631	u8 key[SMB3_SIGN_KEY_SIZE];
3632	struct aead_request *req;
3633	char *iv;
3634	unsigned int iv_len;
3635	DECLARE_CRYPTO_WAIT(wait);
3636	struct crypto_aead *tfm;
3637	unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3638
3639	rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
3640	if (rc) {
3641		cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
3642			 enc ? "en" : "de");
3643		return 0;
3644	}
3645
3646	rc = smb3_crypto_aead_allocate(server);
3647	if (rc) {
3648		cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
3649		return rc;
3650	}
3651
3652	tfm = enc ? server->secmech.ccmaesencrypt :
3653						server->secmech.ccmaesdecrypt;
3654	rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
 
 
 
 
 
 
3655	if (rc) {
3656		cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
3657		return rc;
3658	}
3659
3660	rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
3661	if (rc) {
3662		cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
3663		return rc;
3664	}
3665
3666	req = aead_request_alloc(tfm, GFP_KERNEL);
3667	if (!req) {
3668		cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
3669		return -ENOMEM;
3670	}
3671
3672	if (!enc) {
3673		memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
3674		crypt_len += SMB2_SIGNATURE_SIZE;
3675	}
3676
3677	sg = init_sg(num_rqst, rqst, sign);
3678	if (!sg) {
3679		cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
3680		rc = -ENOMEM;
3681		goto free_req;
3682	}
3683
3684	iv_len = crypto_aead_ivsize(tfm);
3685	iv = kzalloc(iv_len, GFP_KERNEL);
3686	if (!iv) {
3687		cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
3688		rc = -ENOMEM;
3689		goto free_sg;
3690	}
3691
3692	if (server->cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3693		memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
 
3694	else {
3695		iv[0] = 3;
3696		memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3697	}
3698
3699	aead_request_set_crypt(req, sg, sg, crypt_len, iv);
3700	aead_request_set_ad(req, assoc_data_len);
3701
3702	aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
3703				  crypto_req_done, &wait);
3704
3705	rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
3706				: crypto_aead_decrypt(req), &wait);
3707
3708	if (!rc && enc)
3709		memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
3710
3711	kfree(iv);
3712free_sg:
3713	kfree(sg);
3714free_req:
3715	kfree(req);
3716	return rc;
3717}
3718
3719void
3720smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
3721{
3722	int i, j;
3723
3724	for (i = 0; i < num_rqst; i++) {
3725		if (rqst[i].rq_pages) {
3726			for (j = rqst[i].rq_npages - 1; j >= 0; j--)
3727				put_page(rqst[i].rq_pages[j]);
3728			kfree(rqst[i].rq_pages);
3729		}
3730	}
3731}
3732
3733/*
3734 * This function will initialize new_rq and encrypt the content.
3735 * The first entry, new_rq[0], only contains a single iov which contains
3736 * a smb2_transform_hdr and is pre-allocated by the caller.
3737 * This function then populates new_rq[1+] with the content from olq_rq[0+].
3738 *
3739 * The end result is an array of smb_rqst structures where the first structure
3740 * only contains a single iov for the transform header which we then can pass
3741 * to crypt_message().
3742 *
3743 * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
3744 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
3745 */
3746static int
3747smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
3748		       struct smb_rqst *new_rq, struct smb_rqst *old_rq)
3749{
3750	struct page **pages;
3751	struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3752	unsigned int npages;
3753	unsigned int orig_len = 0;
3754	int i, j;
3755	int rc = -ENOMEM;
3756
3757	for (i = 1; i < num_rqst; i++) {
3758		npages = old_rq[i - 1].rq_npages;
3759		pages = kmalloc_array(npages, sizeof(struct page *),
3760				      GFP_KERNEL);
3761		if (!pages)
3762			goto err_free;
3763
3764		new_rq[i].rq_pages = pages;
3765		new_rq[i].rq_npages = npages;
3766		new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3767		new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3768		new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3769		new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3770		new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3771
3772		orig_len += smb_rqst_len(server, &old_rq[i - 1]);
3773
3774		for (j = 0; j < npages; j++) {
3775			pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3776			if (!pages[j])
3777				goto err_free;
3778		}
3779
3780		/* copy pages form the old */
3781		for (j = 0; j < npages; j++) {
3782			char *dst, *src;
3783			unsigned int offset, len;
3784
3785			rqst_page_get_length(&new_rq[i], j, &len, &offset);
3786
3787			dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
3788			src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
3789
3790			memcpy(dst, src, len);
3791			kunmap(new_rq[i].rq_pages[j]);
3792			kunmap(old_rq[i - 1].rq_pages[j]);
3793		}
3794	}
3795
3796	/* fill the 1st iov with a transform header */
3797	fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
3798
3799	rc = crypt_message(server, num_rqst, new_rq, 1);
3800	cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
3801	if (rc)
3802		goto err_free;
3803
3804	return rc;
3805
3806err_free:
3807	smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
3808	return rc;
3809}
3810
3811static int
3812smb3_is_transform_hdr(void *buf)
3813{
3814	struct smb2_transform_hdr *trhdr = buf;
3815
3816	return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
3817}
3818
3819static int
3820decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
3821		 unsigned int buf_data_size, struct page **pages,
3822		 unsigned int npages, unsigned int page_data_size)
 
3823{
3824	struct kvec iov[2];
3825	struct smb_rqst rqst = {NULL};
3826	int rc;
3827
3828	iov[0].iov_base = buf;
3829	iov[0].iov_len = sizeof(struct smb2_transform_hdr);
3830	iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
3831	iov[1].iov_len = buf_data_size;
3832
3833	rqst.rq_iov = iov;
3834	rqst.rq_nvec = 2;
3835	rqst.rq_pages = pages;
3836	rqst.rq_npages = npages;
3837	rqst.rq_pagesz = PAGE_SIZE;
3838	rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
3839
3840	rc = crypt_message(server, 1, &rqst, 0);
3841	cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
3842
3843	if (rc)
3844		return rc;
3845
3846	memmove(buf, iov[1].iov_base, buf_data_size);
3847
3848	server->total_read = buf_data_size + page_data_size;
 
3849
3850	return rc;
3851}
3852
3853static int
3854read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
3855		     unsigned int npages, unsigned int len)
3856{
3857	int i;
3858	int length;
3859
3860	for (i = 0; i < npages; i++) {
3861		struct page *page = pages[i];
3862		size_t n;
3863
3864		n = len;
3865		if (len >= PAGE_SIZE) {
3866			/* enough data to fill the page */
3867			n = PAGE_SIZE;
3868			len -= n;
3869		} else {
3870			zero_user(page, len, PAGE_SIZE - len);
3871			len = 0;
3872		}
3873		length = cifs_read_page_from_socket(server, page, 0, n);
3874		if (length < 0)
3875			return length;
3876		server->total_read += length;
3877	}
3878
3879	return 0;
3880}
3881
3882static int
3883init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
3884	       unsigned int cur_off, struct bio_vec **page_vec)
3885{
3886	struct bio_vec *bvec;
3887	int i;
3888
3889	bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
3890	if (!bvec)
3891		return -ENOMEM;
3892
3893	for (i = 0; i < npages; i++) {
3894		bvec[i].bv_page = pages[i];
3895		bvec[i].bv_offset = (i == 0) ? cur_off : 0;
3896		bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
3897		data_size -= bvec[i].bv_len;
3898	}
3899
3900	if (data_size != 0) {
3901		cifs_dbg(VFS, "%s: something went wrong\n", __func__);
3902		kfree(bvec);
3903		return -EIO;
3904	}
3905
3906	*page_vec = bvec;
3907	return 0;
3908}
3909
3910static int
3911handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
3912		 char *buf, unsigned int buf_len, struct page **pages,
3913		 unsigned int npages, unsigned int page_data_size)
 
3914{
3915	unsigned int data_offset;
3916	unsigned int data_len;
3917	unsigned int cur_off;
3918	unsigned int cur_page_idx;
3919	unsigned int pad_len;
3920	struct cifs_readdata *rdata = mid->callback_data;
3921	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
3922	struct bio_vec *bvec = NULL;
3923	struct iov_iter iter;
3924	struct kvec iov;
3925	int length;
3926	bool use_rdma_mr = false;
3927
3928	if (shdr->Command != SMB2_READ) {
3929		cifs_server_dbg(VFS, "only big read responses are supported\n");
3930		return -ENOTSUPP;
3931	}
3932
3933	if (server->ops->is_session_expired &&
3934	    server->ops->is_session_expired(buf)) {
3935		cifs_reconnect(server);
3936		wake_up(&server->response_q);
3937		return -1;
3938	}
3939
3940	if (server->ops->is_status_pending &&
3941			server->ops->is_status_pending(buf, server))
3942		return -1;
3943
3944	/* set up first two iov to get credits */
3945	rdata->iov[0].iov_base = buf;
3946	rdata->iov[0].iov_len = 0;
3947	rdata->iov[1].iov_base = buf;
3948	rdata->iov[1].iov_len =
3949		min_t(unsigned int, buf_len, server->vals->read_rsp_size);
3950	cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
3951		 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
3952	cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
3953		 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
3954
3955	rdata->result = server->ops->map_error(buf, true);
3956	if (rdata->result != 0) {
3957		cifs_dbg(FYI, "%s: server returned error %d\n",
3958			 __func__, rdata->result);
3959		/* normal error on read response */
3960		dequeue_mid(mid, false);
 
 
 
3961		return 0;
3962	}
3963
3964	data_offset = server->ops->read_data_offset(buf);
3965#ifdef CONFIG_CIFS_SMB_DIRECT
3966	use_rdma_mr = rdata->mr;
3967#endif
3968	data_len = server->ops->read_data_length(buf, use_rdma_mr);
3969
3970	if (data_offset < server->vals->read_rsp_size) {
3971		/*
3972		 * win2k8 sometimes sends an offset of 0 when the read
3973		 * is beyond the EOF. Treat it as if the data starts just after
3974		 * the header.
3975		 */
3976		cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
3977			 __func__, data_offset);
3978		data_offset = server->vals->read_rsp_size;
3979	} else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
3980		/* data_offset is beyond the end of smallbuf */
3981		cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
3982			 __func__, data_offset);
3983		rdata->result = -EIO;
3984		dequeue_mid(mid, rdata->result);
 
 
 
3985		return 0;
3986	}
3987
3988	pad_len = data_offset - server->vals->read_rsp_size;
3989
3990	if (buf_len <= data_offset) {
3991		/* read response payload is in pages */
3992		cur_page_idx = pad_len / PAGE_SIZE;
3993		cur_off = pad_len % PAGE_SIZE;
3994
3995		if (cur_page_idx != 0) {
3996			/* data offset is beyond the 1st page of response */
3997			cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
3998				 __func__, data_offset);
3999			rdata->result = -EIO;
4000			dequeue_mid(mid, rdata->result);
 
 
 
4001			return 0;
4002		}
4003
4004		if (data_len > page_data_size - pad_len) {
4005			/* data_len is corrupt -- discard frame */
4006			rdata->result = -EIO;
4007			dequeue_mid(mid, rdata->result);
 
 
 
4008			return 0;
4009		}
4010
4011		rdata->result = init_read_bvec(pages, npages, page_data_size,
4012					       cur_off, &bvec);
4013		if (rdata->result != 0) {
4014			dequeue_mid(mid, rdata->result);
 
 
 
4015			return 0;
4016		}
4017
4018		iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4019	} else if (buf_len >= data_offset + data_len) {
4020		/* read response payload is in buf */
4021		WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4022		iov.iov_base = buf + data_offset;
4023		iov.iov_len = data_len;
4024		iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4025	} else {
4026		/* read response payload cannot be in both buf and pages */
4027		WARN_ONCE(1, "buf can not contain only a part of read data");
4028		rdata->result = -EIO;
4029		dequeue_mid(mid, rdata->result);
 
 
 
4030		return 0;
4031	}
4032
4033	length = rdata->copy_into_pages(server, rdata, &iter);
4034
4035	kfree(bvec);
4036
4037	if (length < 0)
4038		return length;
4039
4040	dequeue_mid(mid, false);
 
 
 
4041	return length;
4042}
4043
4044struct smb2_decrypt_work {
4045	struct work_struct decrypt;
4046	struct TCP_Server_Info *server;
4047	struct page **ppages;
4048	char *buf;
4049	unsigned int npages;
4050	unsigned int len;
4051};
4052
4053
4054static void smb2_decrypt_offload(struct work_struct *work)
4055{
4056	struct smb2_decrypt_work *dw = container_of(work,
4057				struct smb2_decrypt_work, decrypt);
4058	int i, rc;
4059	struct mid_q_entry *mid;
4060
4061	rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4062			      dw->ppages, dw->npages, dw->len);
4063	if (rc) {
4064		cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4065		goto free_pages;
4066	}
4067
4068	dw->server->lstrp = jiffies;
4069	mid = smb2_find_mid(dw->server, dw->buf);
4070	if (mid == NULL)
4071		cifs_dbg(FYI, "mid not found\n");
4072	else {
4073		mid->decrypted = true;
4074		rc = handle_read_data(dw->server, mid, dw->buf,
4075				      dw->server->vals->read_rsp_size,
4076				      dw->ppages, dw->npages, dw->len);
4077		mid->callback(mid);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4078		cifs_mid_q_entry_release(mid);
4079	}
4080
4081free_pages:
4082	for (i = dw->npages-1; i >= 0; i--)
4083		put_page(dw->ppages[i]);
4084
4085	kfree(dw->ppages);
4086	cifs_small_buf_release(dw->buf);
4087	kfree(dw);
4088}
4089
4090
4091static int
4092receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4093		       int *num_mids)
4094{
4095	char *buf = server->smallbuf;
4096	struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4097	unsigned int npages;
4098	struct page **pages;
4099	unsigned int len;
4100	unsigned int buflen = server->pdu_size;
4101	int rc;
4102	int i = 0;
4103	struct smb2_decrypt_work *dw;
4104
4105	*num_mids = 1;
4106	len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4107		sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4108
4109	rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4110	if (rc < 0)
4111		return rc;
4112	server->total_read += rc;
4113
4114	len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4115		server->vals->read_rsp_size;
4116	npages = DIV_ROUND_UP(len, PAGE_SIZE);
4117
4118	pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4119	if (!pages) {
4120		rc = -ENOMEM;
4121		goto discard_data;
4122	}
4123
4124	for (; i < npages; i++) {
4125		pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4126		if (!pages[i]) {
4127			rc = -ENOMEM;
4128			goto discard_data;
4129		}
4130	}
4131
4132	/* read read data into pages */
4133	rc = read_data_into_pages(server, pages, npages, len);
4134	if (rc)
4135		goto free_pages;
4136
4137	rc = cifs_discard_remaining_data(server);
4138	if (rc)
4139		goto free_pages;
4140
4141	/*
4142	 * For large reads, offload to different thread for better performance,
4143	 * use more cores decrypting which can be expensive
4144	 */
4145
4146	if ((server->min_offload) && (server->in_flight > 1) &&
4147	    (server->pdu_size >= server->min_offload)) {
4148		dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4149		if (dw == NULL)
4150			goto non_offloaded_decrypt;
4151
4152		dw->buf = server->smallbuf;
4153		server->smallbuf = (char *)cifs_small_buf_get();
4154
4155		INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4156
4157		dw->npages = npages;
4158		dw->server = server;
4159		dw->ppages = pages;
4160		dw->len = len;
4161		queue_work(decrypt_wq, &dw->decrypt);
4162		*num_mids = 0; /* worker thread takes care of finding mid */
4163		return -1;
4164	}
4165
4166non_offloaded_decrypt:
4167	rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4168			      pages, npages, len);
4169	if (rc)
4170		goto free_pages;
4171
4172	*mid = smb2_find_mid(server, buf);
4173	if (*mid == NULL)
4174		cifs_dbg(FYI, "mid not found\n");
4175	else {
4176		cifs_dbg(FYI, "mid found\n");
4177		(*mid)->decrypted = true;
4178		rc = handle_read_data(server, *mid, buf,
4179				      server->vals->read_rsp_size,
4180				      pages, npages, len);
 
 
 
 
 
 
4181	}
4182
4183free_pages:
4184	for (i = i - 1; i >= 0; i--)
4185		put_page(pages[i]);
4186	kfree(pages);
4187	return rc;
4188discard_data:
4189	cifs_discard_remaining_data(server);
4190	goto free_pages;
4191}
4192
4193static int
4194receive_encrypted_standard(struct TCP_Server_Info *server,
4195			   struct mid_q_entry **mids, char **bufs,
4196			   int *num_mids)
4197{
4198	int ret, length;
4199	char *buf = server->smallbuf;
4200	struct smb2_sync_hdr *shdr;
4201	unsigned int pdu_length = server->pdu_size;
4202	unsigned int buf_size;
4203	struct mid_q_entry *mid_entry;
4204	int next_is_large;
4205	char *next_buffer = NULL;
4206
4207	*num_mids = 0;
4208
4209	/* switch to large buffer if too big for a small one */
4210	if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4211		server->large_buf = true;
4212		memcpy(server->bigbuf, buf, server->total_read);
4213		buf = server->bigbuf;
4214	}
4215
4216	/* now read the rest */
4217	length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4218				pdu_length - HEADER_SIZE(server) + 1);
4219	if (length < 0)
4220		return length;
4221	server->total_read += length;
4222
4223	buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4224	length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
4225	if (length)
4226		return length;
4227
4228	next_is_large = server->large_buf;
4229one_more:
4230	shdr = (struct smb2_sync_hdr *)buf;
4231	if (shdr->NextCommand) {
4232		if (next_is_large)
4233			next_buffer = (char *)cifs_buf_get();
4234		else
4235			next_buffer = (char *)cifs_small_buf_get();
4236		memcpy(next_buffer,
4237		       buf + le32_to_cpu(shdr->NextCommand),
4238		       pdu_length - le32_to_cpu(shdr->NextCommand));
4239	}
4240
4241	mid_entry = smb2_find_mid(server, buf);
4242	if (mid_entry == NULL)
4243		cifs_dbg(FYI, "mid not found\n");
4244	else {
4245		cifs_dbg(FYI, "mid found\n");
4246		mid_entry->decrypted = true;
4247		mid_entry->resp_buf_size = server->pdu_size;
4248	}
4249
4250	if (*num_mids >= MAX_COMPOUND) {
4251		cifs_server_dbg(VFS, "too many PDUs in compound\n");
4252		return -1;
4253	}
4254	bufs[*num_mids] = buf;
4255	mids[(*num_mids)++] = mid_entry;
4256
4257	if (mid_entry && mid_entry->handle)
4258		ret = mid_entry->handle(server, mid_entry);
4259	else
4260		ret = cifs_handle_standard(server, mid_entry);
4261
4262	if (ret == 0 && shdr->NextCommand) {
4263		pdu_length -= le32_to_cpu(shdr->NextCommand);
4264		server->large_buf = next_is_large;
4265		if (next_is_large)
4266			server->bigbuf = buf = next_buffer;
4267		else
4268			server->smallbuf = buf = next_buffer;
4269		goto one_more;
4270	} else if (ret != 0) {
4271		/*
4272		 * ret != 0 here means that we didn't get to handle_mid() thus
4273		 * server->smallbuf and server->bigbuf are still valid. We need
4274		 * to free next_buffer because it is not going to be used
4275		 * anywhere.
4276		 */
4277		if (next_is_large)
4278			free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4279		else
4280			free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4281	}
4282
4283	return ret;
4284}
4285
4286static int
4287smb3_receive_transform(struct TCP_Server_Info *server,
4288		       struct mid_q_entry **mids, char **bufs, int *num_mids)
4289{
4290	char *buf = server->smallbuf;
4291	unsigned int pdu_length = server->pdu_size;
4292	struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4293	unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4294
4295	if (pdu_length < sizeof(struct smb2_transform_hdr) +
4296						sizeof(struct smb2_sync_hdr)) {
4297		cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4298			 pdu_length);
4299		cifs_reconnect(server);
4300		wake_up(&server->response_q);
4301		return -ECONNABORTED;
4302	}
4303
4304	if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4305		cifs_server_dbg(VFS, "Transform message is broken\n");
4306		cifs_reconnect(server);
4307		wake_up(&server->response_q);
4308		return -ECONNABORTED;
4309	}
4310
4311	/* TODO: add support for compounds containing READ. */
4312	if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4313		return receive_encrypted_read(server, &mids[0], num_mids);
4314	}
4315
4316	return receive_encrypted_standard(server, mids, bufs, num_mids);
4317}
4318
4319int
4320smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4321{
4322	char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4323
4324	return handle_read_data(server, mid, buf, server->pdu_size,
4325				NULL, 0, 0);
4326}
4327
4328static int
4329smb2_next_header(char *buf)
4330{
4331	struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
4332	struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4333
4334	if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
4335		return sizeof(struct smb2_transform_hdr) +
4336		  le32_to_cpu(t_hdr->OriginalMessageSize);
4337
4338	return le32_to_cpu(hdr->NextCommand);
4339}
4340
4341static int
4342smb2_make_node(unsigned int xid, struct inode *inode,
4343	       struct dentry *dentry, struct cifs_tcon *tcon,
4344	       char *full_path, umode_t mode, dev_t dev)
4345{
4346	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4347	int rc = -EPERM;
4348	int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
4349	FILE_ALL_INFO *buf = NULL;
4350	struct cifs_io_parms io_parms;
4351	__u32 oplock = 0;
4352	struct cifs_fid fid;
4353	struct cifs_open_parms oparms;
4354	unsigned int bytes_written;
4355	struct win_dev *pdev;
4356	struct kvec iov[2];
4357
4358	/*
4359	 * Check if mounted with mount parm 'sfu' mount parm.
4360	 * SFU emulation should work with all servers, but only
4361	 * supports block and char device (no socket & fifo),
4362	 * and was used by default in earlier versions of Windows
4363	 */
4364	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
4365		goto out;
4366
4367	/*
4368	 * TODO: Add ability to create instead via reparse point. Windows (e.g.
4369	 * their current NFS server) uses this approach to expose special files
4370	 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
4371	 */
4372
4373	if (!S_ISCHR(mode) && !S_ISBLK(mode))
4374		goto out;
4375
4376	cifs_dbg(FYI, "sfu compat create special file\n");
4377
4378	buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
4379	if (buf == NULL) {
4380		rc = -ENOMEM;
4381		goto out;
4382	}
4383
4384	if (backup_cred(cifs_sb))
4385		create_options |= CREATE_OPEN_BACKUP_INTENT;
4386
4387	oparms.tcon = tcon;
4388	oparms.cifs_sb = cifs_sb;
4389	oparms.desired_access = GENERIC_WRITE;
4390	oparms.create_options = create_options;
 
4391	oparms.disposition = FILE_CREATE;
4392	oparms.path = full_path;
4393	oparms.fid = &fid;
4394	oparms.reconnect = false;
4395
4396	if (tcon->ses->server->oplocks)
4397		oplock = REQ_OPLOCK;
4398	else
4399		oplock = 0;
4400	rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
4401	if (rc)
4402		goto out;
4403
4404	/*
4405	 * BB Do not bother to decode buf since no local inode yet to put
4406	 * timestamps in, but we can reuse it safely.
4407	 */
4408
4409	pdev = (struct win_dev *)buf;
4410	io_parms.pid = current->tgid;
4411	io_parms.tcon = tcon;
4412	io_parms.offset = 0;
4413	io_parms.length = sizeof(struct win_dev);
4414	iov[1].iov_base = buf;
4415	iov[1].iov_len = sizeof(struct win_dev);
4416	if (S_ISCHR(mode)) {
4417		memcpy(pdev->type, "IntxCHR", 8);
4418		pdev->major = cpu_to_le64(MAJOR(dev));
4419		pdev->minor = cpu_to_le64(MINOR(dev));
4420		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4421							&bytes_written, iov, 1);
4422	} else if (S_ISBLK(mode)) {
4423		memcpy(pdev->type, "IntxBLK", 8);
4424		pdev->major = cpu_to_le64(MAJOR(dev));
4425		pdev->minor = cpu_to_le64(MINOR(dev));
4426		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4427							&bytes_written, iov, 1);
4428	}
4429	tcon->ses->server->ops->close(xid, tcon, &fid);
4430	d_drop(dentry);
4431
4432	/* FIXME: add code here to set EAs */
4433out:
4434	kfree(buf);
4435	return rc;
4436}
4437
4438
4439struct smb_version_operations smb20_operations = {
4440	.compare_fids = smb2_compare_fids,
4441	.setup_request = smb2_setup_request,
4442	.setup_async_request = smb2_setup_async_request,
4443	.check_receive = smb2_check_receive,
4444	.add_credits = smb2_add_credits,
4445	.set_credits = smb2_set_credits,
4446	.get_credits_field = smb2_get_credits_field,
4447	.get_credits = smb2_get_credits,
4448	.wait_mtu_credits = cifs_wait_mtu_credits,
4449	.get_next_mid = smb2_get_next_mid,
4450	.revert_current_mid = smb2_revert_current_mid,
4451	.read_data_offset = smb2_read_data_offset,
4452	.read_data_length = smb2_read_data_length,
4453	.map_error = map_smb2_to_linux_error,
4454	.find_mid = smb2_find_mid,
4455	.check_message = smb2_check_message,
4456	.dump_detail = smb2_dump_detail,
4457	.clear_stats = smb2_clear_stats,
4458	.print_stats = smb2_print_stats,
4459	.is_oplock_break = smb2_is_valid_oplock_break,
4460	.handle_cancelled_mid = smb2_handle_cancelled_mid,
4461	.downgrade_oplock = smb2_downgrade_oplock,
4462	.need_neg = smb2_need_neg,
4463	.negotiate = smb2_negotiate,
4464	.negotiate_wsize = smb2_negotiate_wsize,
4465	.negotiate_rsize = smb2_negotiate_rsize,
4466	.sess_setup = SMB2_sess_setup,
4467	.logoff = SMB2_logoff,
4468	.tree_connect = SMB2_tcon,
4469	.tree_disconnect = SMB2_tdis,
4470	.qfs_tcon = smb2_qfs_tcon,
4471	.is_path_accessible = smb2_is_path_accessible,
4472	.can_echo = smb2_can_echo,
4473	.echo = SMB2_echo,
4474	.query_path_info = smb2_query_path_info,
4475	.get_srv_inum = smb2_get_srv_inum,
4476	.query_file_info = smb2_query_file_info,
4477	.set_path_size = smb2_set_path_size,
4478	.set_file_size = smb2_set_file_size,
4479	.set_file_info = smb2_set_file_info,
4480	.set_compression = smb2_set_compression,
4481	.mkdir = smb2_mkdir,
4482	.mkdir_setinfo = smb2_mkdir_setinfo,
4483	.rmdir = smb2_rmdir,
4484	.unlink = smb2_unlink,
4485	.rename = smb2_rename_path,
4486	.create_hardlink = smb2_create_hardlink,
4487	.query_symlink = smb2_query_symlink,
4488	.query_mf_symlink = smb3_query_mf_symlink,
4489	.create_mf_symlink = smb3_create_mf_symlink,
4490	.open = smb2_open_file,
4491	.set_fid = smb2_set_fid,
4492	.close = smb2_close_file,
4493	.flush = smb2_flush_file,
4494	.async_readv = smb2_async_readv,
4495	.async_writev = smb2_async_writev,
4496	.sync_read = smb2_sync_read,
4497	.sync_write = smb2_sync_write,
4498	.query_dir_first = smb2_query_dir_first,
4499	.query_dir_next = smb2_query_dir_next,
4500	.close_dir = smb2_close_dir,
4501	.calc_smb_size = smb2_calc_size,
4502	.is_status_pending = smb2_is_status_pending,
4503	.is_session_expired = smb2_is_session_expired,
4504	.oplock_response = smb2_oplock_response,
4505	.queryfs = smb2_queryfs,
4506	.mand_lock = smb2_mand_lock,
4507	.mand_unlock_range = smb2_unlock_range,
4508	.push_mand_locks = smb2_push_mandatory_locks,
4509	.get_lease_key = smb2_get_lease_key,
4510	.set_lease_key = smb2_set_lease_key,
4511	.new_lease_key = smb2_new_lease_key,
4512	.calc_signature = smb2_calc_signature,
4513	.is_read_op = smb2_is_read_op,
4514	.set_oplock_level = smb2_set_oplock_level,
4515	.create_lease_buf = smb2_create_lease_buf,
4516	.parse_lease_buf = smb2_parse_lease_buf,
4517	.copychunk_range = smb2_copychunk_range,
4518	.wp_retry_size = smb2_wp_retry_size,
4519	.dir_needs_close = smb2_dir_needs_close,
4520	.get_dfs_refer = smb2_get_dfs_refer,
4521	.select_sectype = smb2_select_sectype,
4522#ifdef CONFIG_CIFS_XATTR
4523	.query_all_EAs = smb2_query_eas,
4524	.set_EA = smb2_set_ea,
4525#endif /* CIFS_XATTR */
4526	.get_acl = get_smb2_acl,
4527	.get_acl_by_fid = get_smb2_acl_by_fid,
4528	.set_acl = set_smb2_acl,
4529	.next_header = smb2_next_header,
4530	.ioctl_query_info = smb2_ioctl_query_info,
4531	.make_node = smb2_make_node,
4532	.fiemap = smb3_fiemap,
4533	.llseek = smb3_llseek,
 
 
4534};
4535
4536struct smb_version_operations smb21_operations = {
4537	.compare_fids = smb2_compare_fids,
4538	.setup_request = smb2_setup_request,
4539	.setup_async_request = smb2_setup_async_request,
4540	.check_receive = smb2_check_receive,
4541	.add_credits = smb2_add_credits,
4542	.set_credits = smb2_set_credits,
4543	.get_credits_field = smb2_get_credits_field,
4544	.get_credits = smb2_get_credits,
4545	.wait_mtu_credits = smb2_wait_mtu_credits,
4546	.adjust_credits = smb2_adjust_credits,
4547	.get_next_mid = smb2_get_next_mid,
4548	.revert_current_mid = smb2_revert_current_mid,
4549	.read_data_offset = smb2_read_data_offset,
4550	.read_data_length = smb2_read_data_length,
4551	.map_error = map_smb2_to_linux_error,
4552	.find_mid = smb2_find_mid,
4553	.check_message = smb2_check_message,
4554	.dump_detail = smb2_dump_detail,
4555	.clear_stats = smb2_clear_stats,
4556	.print_stats = smb2_print_stats,
4557	.is_oplock_break = smb2_is_valid_oplock_break,
4558	.handle_cancelled_mid = smb2_handle_cancelled_mid,
4559	.downgrade_oplock = smb21_downgrade_oplock,
4560	.need_neg = smb2_need_neg,
4561	.negotiate = smb2_negotiate,
4562	.negotiate_wsize = smb2_negotiate_wsize,
4563	.negotiate_rsize = smb2_negotiate_rsize,
4564	.sess_setup = SMB2_sess_setup,
4565	.logoff = SMB2_logoff,
4566	.tree_connect = SMB2_tcon,
4567	.tree_disconnect = SMB2_tdis,
4568	.qfs_tcon = smb2_qfs_tcon,
4569	.is_path_accessible = smb2_is_path_accessible,
4570	.can_echo = smb2_can_echo,
4571	.echo = SMB2_echo,
4572	.query_path_info = smb2_query_path_info,
4573	.get_srv_inum = smb2_get_srv_inum,
4574	.query_file_info = smb2_query_file_info,
4575	.set_path_size = smb2_set_path_size,
4576	.set_file_size = smb2_set_file_size,
4577	.set_file_info = smb2_set_file_info,
4578	.set_compression = smb2_set_compression,
4579	.mkdir = smb2_mkdir,
4580	.mkdir_setinfo = smb2_mkdir_setinfo,
4581	.rmdir = smb2_rmdir,
4582	.unlink = smb2_unlink,
4583	.rename = smb2_rename_path,
4584	.create_hardlink = smb2_create_hardlink,
4585	.query_symlink = smb2_query_symlink,
4586	.query_mf_symlink = smb3_query_mf_symlink,
4587	.create_mf_symlink = smb3_create_mf_symlink,
4588	.open = smb2_open_file,
4589	.set_fid = smb2_set_fid,
4590	.close = smb2_close_file,
4591	.flush = smb2_flush_file,
4592	.async_readv = smb2_async_readv,
4593	.async_writev = smb2_async_writev,
4594	.sync_read = smb2_sync_read,
4595	.sync_write = smb2_sync_write,
4596	.query_dir_first = smb2_query_dir_first,
4597	.query_dir_next = smb2_query_dir_next,
4598	.close_dir = smb2_close_dir,
4599	.calc_smb_size = smb2_calc_size,
4600	.is_status_pending = smb2_is_status_pending,
4601	.is_session_expired = smb2_is_session_expired,
4602	.oplock_response = smb2_oplock_response,
4603	.queryfs = smb2_queryfs,
4604	.mand_lock = smb2_mand_lock,
4605	.mand_unlock_range = smb2_unlock_range,
4606	.push_mand_locks = smb2_push_mandatory_locks,
4607	.get_lease_key = smb2_get_lease_key,
4608	.set_lease_key = smb2_set_lease_key,
4609	.new_lease_key = smb2_new_lease_key,
4610	.calc_signature = smb2_calc_signature,
4611	.is_read_op = smb21_is_read_op,
4612	.set_oplock_level = smb21_set_oplock_level,
4613	.create_lease_buf = smb2_create_lease_buf,
4614	.parse_lease_buf = smb2_parse_lease_buf,
4615	.copychunk_range = smb2_copychunk_range,
4616	.wp_retry_size = smb2_wp_retry_size,
4617	.dir_needs_close = smb2_dir_needs_close,
4618	.enum_snapshots = smb3_enum_snapshots,
 
4619	.get_dfs_refer = smb2_get_dfs_refer,
4620	.select_sectype = smb2_select_sectype,
4621#ifdef CONFIG_CIFS_XATTR
4622	.query_all_EAs = smb2_query_eas,
4623	.set_EA = smb2_set_ea,
4624#endif /* CIFS_XATTR */
4625	.get_acl = get_smb2_acl,
4626	.get_acl_by_fid = get_smb2_acl_by_fid,
4627	.set_acl = set_smb2_acl,
4628	.next_header = smb2_next_header,
4629	.ioctl_query_info = smb2_ioctl_query_info,
4630	.make_node = smb2_make_node,
4631	.fiemap = smb3_fiemap,
4632	.llseek = smb3_llseek,
 
 
4633};
4634
4635struct smb_version_operations smb30_operations = {
4636	.compare_fids = smb2_compare_fids,
4637	.setup_request = smb2_setup_request,
4638	.setup_async_request = smb2_setup_async_request,
4639	.check_receive = smb2_check_receive,
4640	.add_credits = smb2_add_credits,
4641	.set_credits = smb2_set_credits,
4642	.get_credits_field = smb2_get_credits_field,
4643	.get_credits = smb2_get_credits,
4644	.wait_mtu_credits = smb2_wait_mtu_credits,
4645	.adjust_credits = smb2_adjust_credits,
4646	.get_next_mid = smb2_get_next_mid,
4647	.revert_current_mid = smb2_revert_current_mid,
4648	.read_data_offset = smb2_read_data_offset,
4649	.read_data_length = smb2_read_data_length,
4650	.map_error = map_smb2_to_linux_error,
4651	.find_mid = smb2_find_mid,
4652	.check_message = smb2_check_message,
4653	.dump_detail = smb2_dump_detail,
4654	.clear_stats = smb2_clear_stats,
4655	.print_stats = smb2_print_stats,
4656	.dump_share_caps = smb2_dump_share_caps,
4657	.is_oplock_break = smb2_is_valid_oplock_break,
4658	.handle_cancelled_mid = smb2_handle_cancelled_mid,
4659	.downgrade_oplock = smb21_downgrade_oplock,
4660	.need_neg = smb2_need_neg,
4661	.negotiate = smb2_negotiate,
4662	.negotiate_wsize = smb3_negotiate_wsize,
4663	.negotiate_rsize = smb3_negotiate_rsize,
4664	.sess_setup = SMB2_sess_setup,
4665	.logoff = SMB2_logoff,
4666	.tree_connect = SMB2_tcon,
4667	.tree_disconnect = SMB2_tdis,
4668	.qfs_tcon = smb3_qfs_tcon,
4669	.is_path_accessible = smb2_is_path_accessible,
4670	.can_echo = smb2_can_echo,
4671	.echo = SMB2_echo,
4672	.query_path_info = smb2_query_path_info,
 
 
4673	.get_srv_inum = smb2_get_srv_inum,
4674	.query_file_info = smb2_query_file_info,
4675	.set_path_size = smb2_set_path_size,
4676	.set_file_size = smb2_set_file_size,
4677	.set_file_info = smb2_set_file_info,
4678	.set_compression = smb2_set_compression,
4679	.mkdir = smb2_mkdir,
4680	.mkdir_setinfo = smb2_mkdir_setinfo,
4681	.rmdir = smb2_rmdir,
4682	.unlink = smb2_unlink,
4683	.rename = smb2_rename_path,
4684	.create_hardlink = smb2_create_hardlink,
4685	.query_symlink = smb2_query_symlink,
4686	.query_mf_symlink = smb3_query_mf_symlink,
4687	.create_mf_symlink = smb3_create_mf_symlink,
4688	.open = smb2_open_file,
4689	.set_fid = smb2_set_fid,
4690	.close = smb2_close_file,
 
4691	.flush = smb2_flush_file,
4692	.async_readv = smb2_async_readv,
4693	.async_writev = smb2_async_writev,
4694	.sync_read = smb2_sync_read,
4695	.sync_write = smb2_sync_write,
4696	.query_dir_first = smb2_query_dir_first,
4697	.query_dir_next = smb2_query_dir_next,
4698	.close_dir = smb2_close_dir,
4699	.calc_smb_size = smb2_calc_size,
4700	.is_status_pending = smb2_is_status_pending,
4701	.is_session_expired = smb2_is_session_expired,
4702	.oplock_response = smb2_oplock_response,
4703	.queryfs = smb2_queryfs,
4704	.mand_lock = smb2_mand_lock,
4705	.mand_unlock_range = smb2_unlock_range,
4706	.push_mand_locks = smb2_push_mandatory_locks,
4707	.get_lease_key = smb2_get_lease_key,
4708	.set_lease_key = smb2_set_lease_key,
4709	.new_lease_key = smb2_new_lease_key,
4710	.generate_signingkey = generate_smb30signingkey,
4711	.calc_signature = smb3_calc_signature,
4712	.set_integrity  = smb3_set_integrity,
4713	.is_read_op = smb21_is_read_op,
4714	.set_oplock_level = smb3_set_oplock_level,
4715	.create_lease_buf = smb3_create_lease_buf,
4716	.parse_lease_buf = smb3_parse_lease_buf,
4717	.copychunk_range = smb2_copychunk_range,
4718	.duplicate_extents = smb2_duplicate_extents,
4719	.validate_negotiate = smb3_validate_negotiate,
4720	.wp_retry_size = smb2_wp_retry_size,
4721	.dir_needs_close = smb2_dir_needs_close,
4722	.fallocate = smb3_fallocate,
4723	.enum_snapshots = smb3_enum_snapshots,
 
4724	.init_transform_rq = smb3_init_transform_rq,
4725	.is_transform_hdr = smb3_is_transform_hdr,
4726	.receive_transform = smb3_receive_transform,
4727	.get_dfs_refer = smb2_get_dfs_refer,
4728	.select_sectype = smb2_select_sectype,
4729#ifdef CONFIG_CIFS_XATTR
4730	.query_all_EAs = smb2_query_eas,
4731	.set_EA = smb2_set_ea,
4732#endif /* CIFS_XATTR */
4733	.get_acl = get_smb2_acl,
4734	.get_acl_by_fid = get_smb2_acl_by_fid,
4735	.set_acl = set_smb2_acl,
4736	.next_header = smb2_next_header,
4737	.ioctl_query_info = smb2_ioctl_query_info,
4738	.make_node = smb2_make_node,
4739	.fiemap = smb3_fiemap,
4740	.llseek = smb3_llseek,
 
 
4741};
4742
4743struct smb_version_operations smb311_operations = {
4744	.compare_fids = smb2_compare_fids,
4745	.setup_request = smb2_setup_request,
4746	.setup_async_request = smb2_setup_async_request,
4747	.check_receive = smb2_check_receive,
4748	.add_credits = smb2_add_credits,
4749	.set_credits = smb2_set_credits,
4750	.get_credits_field = smb2_get_credits_field,
4751	.get_credits = smb2_get_credits,
4752	.wait_mtu_credits = smb2_wait_mtu_credits,
4753	.adjust_credits = smb2_adjust_credits,
4754	.get_next_mid = smb2_get_next_mid,
4755	.revert_current_mid = smb2_revert_current_mid,
4756	.read_data_offset = smb2_read_data_offset,
4757	.read_data_length = smb2_read_data_length,
4758	.map_error = map_smb2_to_linux_error,
4759	.find_mid = smb2_find_mid,
4760	.check_message = smb2_check_message,
4761	.dump_detail = smb2_dump_detail,
4762	.clear_stats = smb2_clear_stats,
4763	.print_stats = smb2_print_stats,
4764	.dump_share_caps = smb2_dump_share_caps,
4765	.is_oplock_break = smb2_is_valid_oplock_break,
4766	.handle_cancelled_mid = smb2_handle_cancelled_mid,
4767	.downgrade_oplock = smb21_downgrade_oplock,
4768	.need_neg = smb2_need_neg,
4769	.negotiate = smb2_negotiate,
4770	.negotiate_wsize = smb3_negotiate_wsize,
4771	.negotiate_rsize = smb3_negotiate_rsize,
4772	.sess_setup = SMB2_sess_setup,
4773	.logoff = SMB2_logoff,
4774	.tree_connect = SMB2_tcon,
4775	.tree_disconnect = SMB2_tdis,
4776	.qfs_tcon = smb3_qfs_tcon,
4777	.is_path_accessible = smb2_is_path_accessible,
4778	.can_echo = smb2_can_echo,
4779	.echo = SMB2_echo,
4780	.query_path_info = smb2_query_path_info,
 
4781	.get_srv_inum = smb2_get_srv_inum,
4782	.query_file_info = smb2_query_file_info,
4783	.set_path_size = smb2_set_path_size,
4784	.set_file_size = smb2_set_file_size,
4785	.set_file_info = smb2_set_file_info,
4786	.set_compression = smb2_set_compression,
4787	.mkdir = smb2_mkdir,
4788	.mkdir_setinfo = smb2_mkdir_setinfo,
4789	.posix_mkdir = smb311_posix_mkdir,
4790	.rmdir = smb2_rmdir,
4791	.unlink = smb2_unlink,
4792	.rename = smb2_rename_path,
4793	.create_hardlink = smb2_create_hardlink,
4794	.query_symlink = smb2_query_symlink,
4795	.query_mf_symlink = smb3_query_mf_symlink,
4796	.create_mf_symlink = smb3_create_mf_symlink,
4797	.open = smb2_open_file,
4798	.set_fid = smb2_set_fid,
4799	.close = smb2_close_file,
 
4800	.flush = smb2_flush_file,
4801	.async_readv = smb2_async_readv,
4802	.async_writev = smb2_async_writev,
4803	.sync_read = smb2_sync_read,
4804	.sync_write = smb2_sync_write,
4805	.query_dir_first = smb2_query_dir_first,
4806	.query_dir_next = smb2_query_dir_next,
4807	.close_dir = smb2_close_dir,
4808	.calc_smb_size = smb2_calc_size,
4809	.is_status_pending = smb2_is_status_pending,
4810	.is_session_expired = smb2_is_session_expired,
4811	.oplock_response = smb2_oplock_response,
4812	.queryfs = smb311_queryfs,
4813	.mand_lock = smb2_mand_lock,
4814	.mand_unlock_range = smb2_unlock_range,
4815	.push_mand_locks = smb2_push_mandatory_locks,
4816	.get_lease_key = smb2_get_lease_key,
4817	.set_lease_key = smb2_set_lease_key,
4818	.new_lease_key = smb2_new_lease_key,
4819	.generate_signingkey = generate_smb311signingkey,
4820	.calc_signature = smb3_calc_signature,
4821	.set_integrity  = smb3_set_integrity,
4822	.is_read_op = smb21_is_read_op,
4823	.set_oplock_level = smb3_set_oplock_level,
4824	.create_lease_buf = smb3_create_lease_buf,
4825	.parse_lease_buf = smb3_parse_lease_buf,
4826	.copychunk_range = smb2_copychunk_range,
4827	.duplicate_extents = smb2_duplicate_extents,
4828/*	.validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
4829	.wp_retry_size = smb2_wp_retry_size,
4830	.dir_needs_close = smb2_dir_needs_close,
4831	.fallocate = smb3_fallocate,
4832	.enum_snapshots = smb3_enum_snapshots,
 
4833	.init_transform_rq = smb3_init_transform_rq,
4834	.is_transform_hdr = smb3_is_transform_hdr,
4835	.receive_transform = smb3_receive_transform,
4836	.get_dfs_refer = smb2_get_dfs_refer,
4837	.select_sectype = smb2_select_sectype,
4838#ifdef CONFIG_CIFS_XATTR
4839	.query_all_EAs = smb2_query_eas,
4840	.set_EA = smb2_set_ea,
4841#endif /* CIFS_XATTR */
4842	.get_acl = get_smb2_acl,
4843	.get_acl_by_fid = get_smb2_acl_by_fid,
4844	.set_acl = set_smb2_acl,
4845	.next_header = smb2_next_header,
4846	.ioctl_query_info = smb2_ioctl_query_info,
4847	.make_node = smb2_make_node,
4848	.fiemap = smb3_fiemap,
4849	.llseek = smb3_llseek,
 
 
4850};
4851
4852struct smb_version_values smb20_values = {
4853	.version_string = SMB20_VERSION_STRING,
4854	.protocol_id = SMB20_PROT_ID,
4855	.req_capabilities = 0, /* MBZ */
4856	.large_lock_type = 0,
4857	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4858	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4859	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4860	.header_size = sizeof(struct smb2_sync_hdr),
4861	.header_preamble_size = 0,
4862	.max_header_size = MAX_SMB2_HDR_SIZE,
4863	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4864	.lock_cmd = SMB2_LOCK,
4865	.cap_unix = 0,
4866	.cap_nt_find = SMB2_NT_FIND,
4867	.cap_large_files = SMB2_LARGE_FILES,
4868	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4869	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4870	.create_lease_size = sizeof(struct create_lease),
4871};
4872
4873struct smb_version_values smb21_values = {
4874	.version_string = SMB21_VERSION_STRING,
4875	.protocol_id = SMB21_PROT_ID,
4876	.req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
4877	.large_lock_type = 0,
4878	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4879	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4880	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4881	.header_size = sizeof(struct smb2_sync_hdr),
4882	.header_preamble_size = 0,
4883	.max_header_size = MAX_SMB2_HDR_SIZE,
4884	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4885	.lock_cmd = SMB2_LOCK,
4886	.cap_unix = 0,
4887	.cap_nt_find = SMB2_NT_FIND,
4888	.cap_large_files = SMB2_LARGE_FILES,
4889	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4890	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4891	.create_lease_size = sizeof(struct create_lease),
4892};
4893
4894struct smb_version_values smb3any_values = {
4895	.version_string = SMB3ANY_VERSION_STRING,
4896	.protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
4897	.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,
4898	.large_lock_type = 0,
4899	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4900	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4901	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4902	.header_size = sizeof(struct smb2_sync_hdr),
4903	.header_preamble_size = 0,
4904	.max_header_size = MAX_SMB2_HDR_SIZE,
4905	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4906	.lock_cmd = SMB2_LOCK,
4907	.cap_unix = 0,
4908	.cap_nt_find = SMB2_NT_FIND,
4909	.cap_large_files = SMB2_LARGE_FILES,
4910	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4911	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4912	.create_lease_size = sizeof(struct create_lease_v2),
4913};
4914
4915struct smb_version_values smbdefault_values = {
4916	.version_string = SMBDEFAULT_VERSION_STRING,
4917	.protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
4918	.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,
4919	.large_lock_type = 0,
4920	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4921	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4922	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4923	.header_size = sizeof(struct smb2_sync_hdr),
4924	.header_preamble_size = 0,
4925	.max_header_size = MAX_SMB2_HDR_SIZE,
4926	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4927	.lock_cmd = SMB2_LOCK,
4928	.cap_unix = 0,
4929	.cap_nt_find = SMB2_NT_FIND,
4930	.cap_large_files = SMB2_LARGE_FILES,
4931	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4932	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4933	.create_lease_size = sizeof(struct create_lease_v2),
4934};
4935
4936struct smb_version_values smb30_values = {
4937	.version_string = SMB30_VERSION_STRING,
4938	.protocol_id = SMB30_PROT_ID,
4939	.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,
4940	.large_lock_type = 0,
4941	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4942	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4943	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4944	.header_size = sizeof(struct smb2_sync_hdr),
4945	.header_preamble_size = 0,
4946	.max_header_size = MAX_SMB2_HDR_SIZE,
4947	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4948	.lock_cmd = SMB2_LOCK,
4949	.cap_unix = 0,
4950	.cap_nt_find = SMB2_NT_FIND,
4951	.cap_large_files = SMB2_LARGE_FILES,
4952	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4953	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4954	.create_lease_size = sizeof(struct create_lease_v2),
4955};
4956
4957struct smb_version_values smb302_values = {
4958	.version_string = SMB302_VERSION_STRING,
4959	.protocol_id = SMB302_PROT_ID,
4960	.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,
4961	.large_lock_type = 0,
4962	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4963	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4964	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4965	.header_size = sizeof(struct smb2_sync_hdr),
4966	.header_preamble_size = 0,
4967	.max_header_size = MAX_SMB2_HDR_SIZE,
4968	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4969	.lock_cmd = SMB2_LOCK,
4970	.cap_unix = 0,
4971	.cap_nt_find = SMB2_NT_FIND,
4972	.cap_large_files = SMB2_LARGE_FILES,
4973	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4974	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4975	.create_lease_size = sizeof(struct create_lease_v2),
4976};
4977
4978struct smb_version_values smb311_values = {
4979	.version_string = SMB311_VERSION_STRING,
4980	.protocol_id = SMB311_PROT_ID,
4981	.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,
4982	.large_lock_type = 0,
4983	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4984	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4985	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4986	.header_size = sizeof(struct smb2_sync_hdr),
4987	.header_preamble_size = 0,
4988	.max_header_size = MAX_SMB2_HDR_SIZE,
4989	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4990	.lock_cmd = SMB2_LOCK,
4991	.cap_unix = 0,
4992	.cap_nt_find = SMB2_NT_FIND,
4993	.cap_large_files = SMB2_LARGE_FILES,
4994	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4995	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4996	.create_lease_size = sizeof(struct create_lease_v2),
4997};