4 * Copyright (C) International Business Machines Corp., 2009, 2013
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
9 * Contains the routines for constructing the SMB2 PDUs themselves
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
32 #include <linux/kernel.h>
33 #include <linux/vfs.h>
34 #include <linux/task_io_accounting_ops.h>
35 #include <linux/uaccess.h>
36 #include <linux/uuid.h>
37 #include <linux/pagemap.h>
38 #include <linux/xattr.h>
42 #include "cifsproto.h"
43 #include "smb2proto.h"
44 #include "cifs_unicode.h"
45 #include "cifs_debug.h"
47 #include "smb2status.h"
50 #include "cifs_spnego.h"
51 #include "smbdirect.h"
54 * The following table defines the expected "StructureSize" of SMB2 requests
55 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
57 * Note that commands are defined in smb2pdu.h in le16 but the array below is
58 * indexed by command in host byte order.
60 static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
61 /* SMB2_NEGOTIATE */ 36,
62 /* SMB2_SESSION_SETUP */ 25,
64 /* SMB2_TREE_CONNECT */ 9,
65 /* SMB2_TREE_DISCONNECT */ 4,
75 /* SMB2_QUERY_DIRECTORY */ 33,
76 /* SMB2_CHANGE_NOTIFY */ 32,
77 /* SMB2_QUERY_INFO */ 41,
78 /* SMB2_SET_INFO */ 33,
79 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
82 static int encryption_required(const struct cifs_tcon *tcon)
86 if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
87 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
90 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
96 smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
97 const struct cifs_tcon *tcon)
99 shdr->ProtocolId = SMB2_PROTO_NUMBER;
100 shdr->StructureSize = cpu_to_le16(64);
101 shdr->Command = smb2_cmd;
102 if (tcon && tcon->ses && tcon->ses->server) {
103 struct TCP_Server_Info *server = tcon->ses->server;
105 spin_lock(&server->req_lock);
106 /* Request up to 2 credits but don't go over the limit. */
107 if (server->credits >= server->max_credits)
108 shdr->CreditRequest = cpu_to_le16(0);
110 shdr->CreditRequest = cpu_to_le16(
111 min_t(int, server->max_credits -
112 server->credits, 2));
113 spin_unlock(&server->req_lock);
115 shdr->CreditRequest = cpu_to_le16(2);
117 shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
122 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
123 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
124 if ((tcon->ses) && (tcon->ses->server) &&
125 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
126 shdr->CreditCharge = cpu_to_le16(1);
127 /* else CreditCharge MBZ */
129 shdr->TreeId = tcon->tid;
130 /* Uid is not converted */
132 shdr->SessionId = tcon->ses->Suid;
135 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
136 * to pass the path on the Open SMB prefixed by \\server\share.
137 * Not sure when we would need to do the augmented path (if ever) and
138 * setting this flag breaks the SMB2 open operation since it is
139 * illegal to send an empty path name (without \\server\share prefix)
140 * when the DFS flag is set in the SMB open header. We could
141 * consider setting the flag on all operations other than open
142 * but it is safer to net set it for now.
144 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
145 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
147 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign &&
148 !encryption_required(tcon))
149 shdr->Flags |= SMB2_FLAGS_SIGNED;
155 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
158 struct nls_table *nls_codepage;
159 struct cifs_ses *ses;
160 struct TCP_Server_Info *server;
163 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
164 * check for tcp and smb session status done differently
165 * for those three - in the calling routine.
170 if (smb2_command == SMB2_TREE_CONNECT)
173 if (tcon->tidStatus == CifsExiting) {
175 * only tree disconnect, open, and write,
176 * (and ulogoff which does not have tcon)
177 * are allowed as we start force umount.
179 if ((smb2_command != SMB2_WRITE) &&
180 (smb2_command != SMB2_CREATE) &&
181 (smb2_command != SMB2_TREE_DISCONNECT)) {
182 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
187 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
188 (!tcon->ses->server))
192 server = ses->server;
195 * Give demultiplex thread up to 10 seconds to reconnect, should be
196 * greater than cifs socket timeout which is 7 seconds
198 while (server->tcpStatus == CifsNeedReconnect) {
200 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
201 * here since they are implicitly done when session drops.
203 switch (smb2_command) {
205 * BB Should we keep oplock break and add flush to exceptions?
207 case SMB2_TREE_DISCONNECT:
210 case SMB2_OPLOCK_BREAK:
214 wait_event_interruptible_timeout(server->response_q,
215 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
217 /* are we still trying to reconnect? */
218 if (server->tcpStatus != CifsNeedReconnect)
222 * on "soft" mounts we wait once. Hard mounts keep
223 * retrying until process is killed or server comes
227 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
232 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
235 nls_codepage = load_nls_default();
238 * need to prevent multiple threads trying to simultaneously reconnect
239 * the same SMB session
241 mutex_lock(&tcon->ses->session_mutex);
244 * Recheck after acquire mutex. If another thread is negotiating
245 * and the server never sends an answer the socket will be closed
246 * and tcpStatus set to reconnect.
248 if (server->tcpStatus == CifsNeedReconnect) {
250 mutex_unlock(&tcon->ses->session_mutex);
254 rc = cifs_negotiate_protocol(0, tcon->ses);
255 if (!rc && tcon->ses->need_reconnect)
256 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
258 if (rc || !tcon->need_reconnect) {
259 mutex_unlock(&tcon->ses->session_mutex);
263 cifs_mark_open_files_invalid(tcon);
264 if (tcon->use_persistent)
265 tcon->need_reopen_files = true;
267 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
268 mutex_unlock(&tcon->ses->session_mutex);
270 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
274 if (smb2_command != SMB2_INTERNAL_CMD)
275 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
277 atomic_inc(&tconInfoReconnectCount);
280 * Check if handle based operation so we know whether we can continue
281 * or not without returning to caller to reset file handle.
284 * BB Is flush done by server on drop of tcp session? Should we special
285 * case it and skip above?
287 switch (smb2_command) {
293 case SMB2_QUERY_DIRECTORY:
294 case SMB2_CHANGE_NOTIFY:
295 case SMB2_QUERY_INFO:
299 unload_nls(nls_codepage);
304 fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
305 unsigned int *total_len)
307 struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
308 /* lookup word count ie StructureSize from table */
309 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
312 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
313 * largest operations (Create)
317 smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon);
318 spdu->StructureSize2 = cpu_to_le16(parmsize);
320 *total_len = parmsize + sizeof(struct smb2_sync_hdr);
324 * Allocate and return pointer to an SMB request hdr, and set basic
325 * SMB information in the SMB header. If the return code is zero, this
326 * function must have filled in request_buf pointer.
329 smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
330 void **request_buf, unsigned int *total_len)
334 rc = smb2_reconnect(smb2_command, tcon);
338 /* BB eventually switch this to SMB2 specific small buf size */
339 *request_buf = cifs_small_buf_get();
340 if (*request_buf == NULL) {
341 /* BB should we add a retry in here if not a writepage? */
345 fill_small_buf(smb2_command, tcon,
346 (struct smb2_sync_hdr *)(*request_buf),
350 #ifdef CONFIG_CIFS_STATS2
351 uint16_t com_code = le16_to_cpu(smb2_command);
352 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
354 cifs_stats_inc(&tcon->num_smbs_sent);
360 #ifdef CONFIG_CIFS_SMB311
361 /* offset is sizeof smb2_negotiate_req but rounded up to 8 bytes */
362 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) */
365 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
366 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
369 build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
371 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
372 pneg_ctxt->DataLength = cpu_to_le16(38);
373 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
374 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
375 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
376 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
380 build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
382 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
383 pneg_ctxt->DataLength = cpu_to_le16(6);
384 pneg_ctxt->CipherCount = cpu_to_le16(2);
385 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
386 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
390 assemble_neg_contexts(struct smb2_negotiate_req *req,
391 unsigned int *total_len)
393 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT;
395 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
396 /* Add 2 to size to round to 8 byte boundary */
398 pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
399 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
400 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
401 req->NegotiateContextCount = cpu_to_le16(2);
403 *total_len += 4 + sizeof(struct smb2_preauth_neg_context)
404 + sizeof(struct smb2_encryption_neg_context);
407 static void assemble_neg_contexts(struct smb2_negotiate_req *req,
408 unsigned int *total_len)
416 * SMB2 Worker functions follow:
418 * The general structure of the worker functions is:
419 * 1) Call smb2_init (assembles SMB2 header)
420 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
421 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
422 * 4) Decode SMB2 command specific fields in the fixed length area
423 * 5) Decode variable length data area (if any for this SMB2 command type)
424 * 6) Call free smb buffer
430 SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
432 struct smb2_negotiate_req *req;
433 struct smb2_negotiate_rsp *rsp;
438 struct TCP_Server_Info *server = ses->server;
439 int blob_offset, blob_length;
441 int flags = CIFS_NEG_OP;
442 unsigned int total_len;
444 cifs_dbg(FYI, "Negotiate protocol\n");
447 WARN(1, "%s: server is NULL!\n", __func__);
451 rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, (void **) &req, &total_len);
455 req->sync_hdr.SessionId = 0;
456 #ifdef CONFIG_CIFS_SMB311
457 memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
458 memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
461 if (strcmp(ses->server->vals->version_string,
462 SMB3ANY_VERSION_STRING) == 0) {
463 req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
464 req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
465 req->DialectCount = cpu_to_le16(2);
467 } else if (strcmp(ses->server->vals->version_string,
468 SMBDEFAULT_VERSION_STRING) == 0) {
469 req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
470 req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
471 req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
472 req->DialectCount = cpu_to_le16(3);
475 /* otherwise send specific dialect */
476 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
477 req->DialectCount = cpu_to_le16(1);
481 /* only one of SMB2 signing flags may be set in SMB2 request */
483 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
484 else if (global_secflags & CIFSSEC_MAY_SIGN)
485 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
487 req->SecurityMode = 0;
489 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
491 /* ClientGUID must be zero for SMB2.02 dialect */
492 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
493 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
495 memcpy(req->ClientGUID, server->client_guid,
496 SMB2_CLIENT_GUID_SIZE);
497 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
498 assemble_neg_contexts(req, &total_len);
500 iov[0].iov_base = (char *)req;
501 iov[0].iov_len = total_len;
503 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
504 cifs_small_buf_release(req);
505 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
507 * No tcon so can't do
508 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
510 if (rc == -EOPNOTSUPP) {
511 cifs_dbg(VFS, "Dialect not supported by server. Consider "
512 "specifying vers=1.0 or vers=2.0 on mount for accessing"
518 if (strcmp(ses->server->vals->version_string,
519 SMB3ANY_VERSION_STRING) == 0) {
520 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
522 "SMB2 dialect returned but not requested\n");
524 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
526 "SMB2.1 dialect returned but not requested\n");
529 } else if (strcmp(ses->server->vals->version_string,
530 SMBDEFAULT_VERSION_STRING) == 0) {
531 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
533 "SMB2 dialect returned but not requested\n");
535 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
536 /* ops set to 3.0 by default for default so update */
537 ses->server->ops = &smb21_operations;
539 } else if (le16_to_cpu(rsp->DialectRevision) !=
540 ses->server->vals->protocol_id) {
541 /* if requested single dialect ensure returned dialect matched */
542 cifs_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n",
543 le16_to_cpu(rsp->DialectRevision));
547 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
549 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
550 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
551 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
552 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
553 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
554 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
555 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
556 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
557 #ifdef CONFIG_CIFS_SMB311
558 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
559 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
562 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
563 le16_to_cpu(rsp->DialectRevision));
567 server->dialect = le16_to_cpu(rsp->DialectRevision);
569 /* BB: add check that dialect was valid given dialect(s) we asked for */
571 #ifdef CONFIG_CIFS_SMB311
573 * Keep a copy of the hash after negprot. This hash will be
574 * the starting hash value for all sessions made from this
577 memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
578 SMB2_PREAUTH_HASH_SIZE);
580 /* SMB2 only has an extended negflavor */
581 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
582 /* set it to the maximum buffer size value we can send with 1 credit */
583 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
584 SMB2_MAX_BUFFER_SIZE);
585 server->max_read = le32_to_cpu(rsp->MaxReadSize);
586 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
587 /* BB Do we need to validate the SecurityMode? */
588 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
589 server->capabilities = le32_to_cpu(rsp->Capabilities);
591 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
593 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
596 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
598 * ses->sectype = RawNTLMSSP;
599 * but for time being this is our only auth choice so doesn't matter.
600 * We just found a server which sets blob length to zero expecting raw.
602 if (blob_length == 0) {
603 cifs_dbg(FYI, "missing security blob on negprot\n");
604 server->sec_ntlmssp = true;
607 rc = cifs_enable_signing(server, ses->sign);
611 rc = decode_negTokenInit(security_blob, blob_length, server);
618 free_rsp_buf(resp_buftype, rsp);
622 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
625 struct validate_negotiate_info_req vneg_inbuf;
626 struct validate_negotiate_info_rsp *pneg_rsp = NULL;
628 u32 inbuflen; /* max of 4 dialects */
630 cifs_dbg(FYI, "validate negotiate\n");
632 #ifdef CONFIG_CIFS_SMB_DIRECT
633 if (tcon->ses->server->rdma)
637 /* In SMB3.11 preauth integrity supersedes validate negotiate */
638 if (tcon->ses->server->dialect == SMB311_PROT_ID)
642 * validation ioctl must be signed, so no point sending this if we
643 * can not sign it (ie are not known user). Even if signing is not
644 * required (enabled but not negotiated), in those cases we selectively
645 * sign just this, the first and only signed request on a connection.
646 * Having validation of negotiate info helps reduce attack vectors.
648 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
649 return 0; /* validation requires signing */
651 if (tcon->ses->user_name == NULL) {
652 cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
653 return 0; /* validation requires signing */
656 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
657 cifs_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
659 vneg_inbuf.Capabilities =
660 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
661 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
662 SMB2_CLIENT_GUID_SIZE);
665 vneg_inbuf.SecurityMode =
666 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
667 else if (global_secflags & CIFSSEC_MAY_SIGN)
668 vneg_inbuf.SecurityMode =
669 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
671 vneg_inbuf.SecurityMode = 0;
674 if (strcmp(tcon->ses->server->vals->version_string,
675 SMB3ANY_VERSION_STRING) == 0) {
676 vneg_inbuf.Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
677 vneg_inbuf.Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
678 vneg_inbuf.DialectCount = cpu_to_le16(2);
679 /* structure is big enough for 3 dialects, sending only 2 */
680 inbuflen = sizeof(struct validate_negotiate_info_req) - 2;
681 } else if (strcmp(tcon->ses->server->vals->version_string,
682 SMBDEFAULT_VERSION_STRING) == 0) {
683 vneg_inbuf.Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
684 vneg_inbuf.Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
685 vneg_inbuf.Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
686 vneg_inbuf.DialectCount = cpu_to_le16(3);
687 /* structure is big enough for 3 dialects */
688 inbuflen = sizeof(struct validate_negotiate_info_req);
690 /* otherwise specific dialect was requested */
691 vneg_inbuf.Dialects[0] =
692 cpu_to_le16(tcon->ses->server->vals->protocol_id);
693 vneg_inbuf.DialectCount = cpu_to_le16(1);
694 /* structure is big enough for 3 dialects, sending only 1 */
695 inbuflen = sizeof(struct validate_negotiate_info_req) - 4;
698 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
699 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
700 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
701 (char **)&pneg_rsp, &rsplen);
704 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
708 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
709 cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n",
712 /* relax check since Mac returns max bufsize allowed on ioctl */
713 if ((rsplen > CIFSMaxBufSize)
714 || (rsplen < sizeof(struct validate_negotiate_info_rsp)))
718 /* check validate negotiate info response matches what we got earlier */
719 if (pneg_rsp->Dialect != cpu_to_le16(tcon->ses->server->dialect))
722 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
725 /* do not validate server guid because not saved at negprot time yet */
727 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
728 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
731 /* validate negotiate successful */
732 cifs_dbg(FYI, "validate negotiate info successful\n");
737 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
744 smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
753 if (server->sec_ntlmssp &&
754 (global_secflags & CIFSSEC_MAY_NTLMSSP))
756 if ((server->sec_kerberos || server->sec_mskerberos) &&
757 (global_secflags & CIFSSEC_MAY_KRB5))
765 struct SMB2_sess_data {
767 struct cifs_ses *ses;
768 struct nls_table *nls_cp;
769 void (*func)(struct SMB2_sess_data *);
771 u64 previous_session;
773 /* we will send the SMB in three pieces:
774 * a fixed length beginning part, an optional
775 * SPNEGO blob (which can be zero length), and a
776 * last part which will include the strings
777 * and rest of bcc area. This allows us to avoid
778 * a large buffer 17K allocation
785 SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
788 struct cifs_ses *ses = sess_data->ses;
789 struct smb2_sess_setup_req *req;
790 struct TCP_Server_Info *server = ses->server;
791 unsigned int total_len;
793 rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, (void **) &req,
798 /* First session, not a reauthenticate */
799 req->sync_hdr.SessionId = 0;
801 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
802 req->PreviousSessionId = sess_data->previous_session;
804 req->Flags = 0; /* MBZ */
805 /* to enable echos and oplocks */
806 req->sync_hdr.CreditRequest = cpu_to_le16(3);
808 /* only one of SMB2 signing flags may be set in SMB2 request */
810 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
811 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
812 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
814 req->SecurityMode = 0;
816 req->Capabilities = 0;
817 req->Channel = 0; /* MBZ */
819 sess_data->iov[0].iov_base = (char *)req;
821 sess_data->iov[0].iov_len = total_len - 1;
823 * This variable will be used to clear the buffer
824 * allocated above in case of any error in the calling function.
826 sess_data->buf0_type = CIFS_SMALL_BUFFER;
832 SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
834 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
835 sess_data->buf0_type = CIFS_NO_BUFFER;
839 SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
842 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
843 struct kvec rsp_iov = { NULL, 0 };
845 /* Testing shows that buffer offset must be at location of Buffer[0] */
846 req->SecurityBufferOffset =
847 cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */);
848 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
850 /* BB add code to build os and lm fields */
852 rc = smb2_send_recv(sess_data->xid, sess_data->ses,
854 &sess_data->buf0_type,
855 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
856 cifs_small_buf_release(sess_data->iov[0].iov_base);
857 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
863 SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
866 struct cifs_ses *ses = sess_data->ses;
868 mutex_lock(&ses->server->srv_mutex);
869 if (ses->server->ops->generate_signingkey) {
870 rc = ses->server->ops->generate_signingkey(ses);
873 "SMB3 session key generation failed\n");
874 mutex_unlock(&ses->server->srv_mutex);
878 if (!ses->server->session_estab) {
879 ses->server->sequence_number = 0x2;
880 ses->server->session_estab = true;
882 mutex_unlock(&ses->server->srv_mutex);
884 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
885 spin_lock(&GlobalMid_Lock);
886 ses->status = CifsGood;
887 ses->need_reconnect = false;
888 spin_unlock(&GlobalMid_Lock);
892 #ifdef CONFIG_CIFS_UPCALL
894 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
897 struct cifs_ses *ses = sess_data->ses;
898 struct cifs_spnego_msg *msg;
899 struct key *spnego_key = NULL;
900 struct smb2_sess_setup_rsp *rsp = NULL;
902 rc = SMB2_sess_alloc_buffer(sess_data);
906 spnego_key = cifs_get_spnego_key(ses);
907 if (IS_ERR(spnego_key)) {
908 rc = PTR_ERR(spnego_key);
913 msg = spnego_key->payload.data[0];
915 * check version field to make sure that cifs.upcall is
916 * sending us a response in an expected form
918 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
920 "bad cifs.upcall version. Expected %d got %d",
921 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
923 goto out_put_spnego_key;
926 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
928 if (!ses->auth_key.response) {
930 "Kerberos can't allocate (%u bytes) memory",
933 goto out_put_spnego_key;
935 ses->auth_key.len = msg->sesskey_len;
937 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
938 sess_data->iov[1].iov_len = msg->secblob_len;
940 rc = SMB2_sess_sendreceive(sess_data);
942 goto out_put_spnego_key;
944 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
945 ses->Suid = rsp->hdr.sync_hdr.SessionId;
947 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
949 rc = SMB2_sess_establish_session(sess_data);
951 key_invalidate(spnego_key);
954 sess_data->result = rc;
955 sess_data->func = NULL;
956 SMB2_sess_free_buffer(sess_data);
960 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
962 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
963 sess_data->result = -EOPNOTSUPP;
964 sess_data->func = NULL;
969 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
972 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
975 struct cifs_ses *ses = sess_data->ses;
976 struct smb2_sess_setup_rsp *rsp = NULL;
977 char *ntlmssp_blob = NULL;
978 bool use_spnego = false; /* else use raw ntlmssp */
982 * If memory allocation is successful, caller of this function
985 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
990 ses->ntlmssp->sesskey_per_smbsess = true;
992 rc = SMB2_sess_alloc_buffer(sess_data);
996 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
998 if (ntlmssp_blob == NULL) {
1003 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
1005 /* BB eventually need to add this */
1006 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1010 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
1011 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1013 sess_data->iov[1].iov_base = ntlmssp_blob;
1014 sess_data->iov[1].iov_len = blob_length;
1016 rc = SMB2_sess_sendreceive(sess_data);
1017 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1019 /* If true, rc here is expected and not an error */
1020 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
1021 rsp->hdr.sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
1027 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
1028 le16_to_cpu(rsp->SecurityBufferOffset)) {
1029 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
1030 le16_to_cpu(rsp->SecurityBufferOffset));
1034 rc = decode_ntlmssp_challenge(rsp->Buffer,
1035 le16_to_cpu(rsp->SecurityBufferLength), ses);
1039 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
1042 ses->Suid = rsp->hdr.sync_hdr.SessionId;
1043 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1046 kfree(ntlmssp_blob);
1047 SMB2_sess_free_buffer(sess_data);
1049 sess_data->result = 0;
1050 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
1054 kfree(ses->ntlmssp);
1055 ses->ntlmssp = NULL;
1056 sess_data->result = rc;
1057 sess_data->func = NULL;
1061 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
1064 struct cifs_ses *ses = sess_data->ses;
1065 struct smb2_sess_setup_req *req;
1066 struct smb2_sess_setup_rsp *rsp = NULL;
1067 unsigned char *ntlmssp_blob = NULL;
1068 bool use_spnego = false; /* else use raw ntlmssp */
1069 u16 blob_length = 0;
1071 rc = SMB2_sess_alloc_buffer(sess_data);
1075 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
1076 req->sync_hdr.SessionId = ses->Suid;
1078 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1081 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1086 /* BB eventually need to add this */
1087 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1091 sess_data->iov[1].iov_base = ntlmssp_blob;
1092 sess_data->iov[1].iov_len = blob_length;
1094 rc = SMB2_sess_sendreceive(sess_data);
1098 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1100 ses->Suid = rsp->hdr.sync_hdr.SessionId;
1101 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1103 rc = SMB2_sess_establish_session(sess_data);
1105 kfree(ntlmssp_blob);
1106 SMB2_sess_free_buffer(sess_data);
1107 kfree(ses->ntlmssp);
1108 ses->ntlmssp = NULL;
1109 sess_data->result = rc;
1110 sess_data->func = NULL;
1114 SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1118 type = smb2_select_sectype(ses->server, ses->sectype);
1119 cifs_dbg(FYI, "sess setup type %d\n", type);
1120 if (type == Unspecified) {
1122 "Unable to select appropriate authentication method!");
1128 sess_data->func = SMB2_auth_kerberos;
1131 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1134 cifs_dbg(VFS, "secType %d not supported!\n", type);
1142 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1143 const struct nls_table *nls_cp)
1146 struct TCP_Server_Info *server = ses->server;
1147 struct SMB2_sess_data *sess_data;
1149 cifs_dbg(FYI, "Session Setup\n");
1152 WARN(1, "%s: server is NULL!\n", __func__);
1156 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1160 rc = SMB2_select_sec(ses, sess_data);
1163 sess_data->xid = xid;
1164 sess_data->ses = ses;
1165 sess_data->buf0_type = CIFS_NO_BUFFER;
1166 sess_data->nls_cp = (struct nls_table *) nls_cp;
1168 #ifdef CONFIG_CIFS_SMB311
1170 * Initialize the session hash with the server one.
1172 memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash,
1173 SMB2_PREAUTH_HASH_SIZE);
1176 while (sess_data->func)
1177 sess_data->func(sess_data);
1179 if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
1180 cifs_dbg(VFS, "signing requested but authenticated as guest\n");
1181 rc = sess_data->result;
1188 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1190 struct smb2_logoff_req *req; /* response is also trivial struct */
1192 struct TCP_Server_Info *server;
1194 unsigned int total_len;
1196 struct kvec rsp_iov;
1199 cifs_dbg(FYI, "disconnect session %p\n", ses);
1201 if (ses && (ses->server))
1202 server = ses->server;
1206 /* no need to send SMB logoff if uid already closed due to reconnect */
1207 if (ses->need_reconnect)
1208 goto smb2_session_already_dead;
1210 rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, (void **) &req, &total_len);
1214 /* since no tcon, smb2_init can not do this, so do here */
1215 req->sync_hdr.SessionId = ses->Suid;
1217 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1218 flags |= CIFS_TRANSFORM_REQ;
1219 else if (server->sign)
1220 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1222 flags |= CIFS_NO_RESP;
1224 iov[0].iov_base = (char *)req;
1225 iov[0].iov_len = total_len;
1227 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
1228 cifs_small_buf_release(req);
1230 * No tcon so can't do
1231 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1234 smb2_session_already_dead:
1238 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1240 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
1243 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1245 /* These are similar values to what Windows uses */
1246 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1248 tcon->max_chunks = 256;
1249 tcon->max_bytes_chunk = 1048576;
1250 tcon->max_bytes_copy = 16777216;
1254 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1255 struct cifs_tcon *tcon, const struct nls_table *cp)
1257 struct smb2_tree_connect_req *req;
1258 struct smb2_tree_connect_rsp *rsp = NULL;
1260 struct kvec rsp_iov = { NULL, 0 };
1264 __le16 *unc_path = NULL;
1266 unsigned int total_len;
1268 cifs_dbg(FYI, "TCON\n");
1270 if (!(ses->server) || !tree)
1273 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1274 if (unc_path == NULL)
1277 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1279 if (unc_path_len < 2) {
1284 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1287 rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, (void **) &req,
1294 if (encryption_required(tcon))
1295 flags |= CIFS_TRANSFORM_REQ;
1297 iov[0].iov_base = (char *)req;
1299 iov[0].iov_len = total_len - 1;
1301 /* Testing shows that buffer offset must be at location of Buffer[0] */
1302 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
1304 req->PathLength = cpu_to_le16(unc_path_len - 2);
1305 iov[1].iov_base = unc_path;
1306 iov[1].iov_len = unc_path_len;
1308 /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
1309 if ((ses->server->dialect == SMB311_PROT_ID) &&
1310 !encryption_required(tcon))
1311 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1313 rc = smb2_send_recv(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
1314 cifs_small_buf_release(req);
1315 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
1319 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1320 tcon->need_reconnect = true;
1322 goto tcon_error_exit;
1325 switch (rsp->ShareType) {
1326 case SMB2_SHARE_TYPE_DISK:
1327 cifs_dbg(FYI, "connection to disk share\n");
1329 case SMB2_SHARE_TYPE_PIPE:
1331 cifs_dbg(FYI, "connection to pipe share\n");
1333 case SMB2_SHARE_TYPE_PRINT:
1335 cifs_dbg(FYI, "connection to printer\n");
1338 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
1340 goto tcon_error_exit;
1343 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
1344 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
1345 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1346 tcon->tidStatus = CifsGood;
1347 tcon->need_reconnect = false;
1348 tcon->tid = rsp->hdr.sync_hdr.TreeId;
1349 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
1351 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1352 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
1353 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
1356 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1357 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1359 init_copy_chunk_defaults(tcon);
1360 if (tcon->ses->server->ops->validate_negotiate)
1361 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
1363 free_rsp_buf(resp_buftype, rsp);
1368 if (rsp && rsp->hdr.sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
1369 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
1375 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1377 struct smb2_tree_disconnect_req *req; /* response is trivial */
1379 struct cifs_ses *ses = tcon->ses;
1381 unsigned int total_len;
1383 struct kvec rsp_iov;
1386 cifs_dbg(FYI, "Tree Disconnect\n");
1388 if (!ses || !(ses->server))
1391 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1394 rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req,
1399 if (encryption_required(tcon))
1400 flags |= CIFS_TRANSFORM_REQ;
1402 flags |= CIFS_NO_RESP;
1404 iov[0].iov_base = (char *)req;
1405 iov[0].iov_len = total_len;
1407 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
1408 cifs_small_buf_release(req);
1410 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1416 static struct create_durable *
1417 create_durable_buf(void)
1419 struct create_durable *buf;
1421 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1425 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1426 (struct create_durable, Data));
1427 buf->ccontext.DataLength = cpu_to_le32(16);
1428 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1429 (struct create_durable, Name));
1430 buf->ccontext.NameLength = cpu_to_le16(4);
1431 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1439 static struct create_durable *
1440 create_reconnect_durable_buf(struct cifs_fid *fid)
1442 struct create_durable *buf;
1444 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1448 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1449 (struct create_durable, Data));
1450 buf->ccontext.DataLength = cpu_to_le32(16);
1451 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1452 (struct create_durable, Name));
1453 buf->ccontext.NameLength = cpu_to_le16(4);
1454 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1455 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
1456 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1465 parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1466 unsigned int *epoch)
1469 struct create_context *cc;
1471 unsigned int remaining;
1474 data_offset = (char *)rsp + server->vals->header_preamble_size + le32_to_cpu(rsp->CreateContextsOffset);
1475 remaining = le32_to_cpu(rsp->CreateContextsLength);
1476 cc = (struct create_context *)data_offset;
1477 while (remaining >= sizeof(struct create_context)) {
1478 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1479 if (le16_to_cpu(cc->NameLength) == 4 &&
1480 strncmp(name, "RqLs", 4) == 0)
1481 return server->ops->parse_lease_buf(cc, epoch);
1483 next = le32_to_cpu(cc->Next);
1487 cc = (struct create_context *)((char *)cc + next);
1494 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1495 unsigned int *num_iovec, __u8 *oplock)
1497 struct smb2_create_req *req = iov[0].iov_base;
1498 unsigned int num = *num_iovec;
1500 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
1501 if (iov[num].iov_base == NULL)
1503 iov[num].iov_len = server->vals->create_lease_size;
1504 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1505 if (!req->CreateContextsOffset)
1506 req->CreateContextsOffset = cpu_to_le32(
1507 sizeof(struct smb2_create_req) +
1508 iov[num - 1].iov_len);
1509 le32_add_cpu(&req->CreateContextsLength,
1510 server->vals->create_lease_size);
1511 *num_iovec = num + 1;
1515 static struct create_durable_v2 *
1516 create_durable_v2_buf(struct cifs_fid *pfid)
1518 struct create_durable_v2 *buf;
1520 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1524 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1525 (struct create_durable_v2, dcontext));
1526 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1527 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1528 (struct create_durable_v2, Name));
1529 buf->ccontext.NameLength = cpu_to_le16(4);
1531 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1532 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1533 generate_random_uuid(buf->dcontext.CreateGuid);
1534 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1536 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1544 static struct create_durable_handle_reconnect_v2 *
1545 create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1547 struct create_durable_handle_reconnect_v2 *buf;
1549 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1554 buf->ccontext.DataOffset =
1555 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1557 buf->ccontext.DataLength =
1558 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1559 buf->ccontext.NameOffset =
1560 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1562 buf->ccontext.NameLength = cpu_to_le16(4);
1564 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1565 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1566 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1567 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1569 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1578 add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1579 struct cifs_open_parms *oparms)
1581 struct smb2_create_req *req = iov[0].iov_base;
1582 unsigned int num = *num_iovec;
1584 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1585 if (iov[num].iov_base == NULL)
1587 iov[num].iov_len = sizeof(struct create_durable_v2);
1588 if (!req->CreateContextsOffset)
1589 req->CreateContextsOffset =
1590 cpu_to_le32(sizeof(struct smb2_create_req) +
1592 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
1593 *num_iovec = num + 1;
1598 add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
1599 struct cifs_open_parms *oparms)
1601 struct smb2_create_req *req = iov[0].iov_base;
1602 unsigned int num = *num_iovec;
1604 /* indicate that we don't need to relock the file */
1605 oparms->reconnect = false;
1607 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1608 if (iov[num].iov_base == NULL)
1610 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1611 if (!req->CreateContextsOffset)
1612 req->CreateContextsOffset =
1613 cpu_to_le32(sizeof(struct smb2_create_req) +
1615 le32_add_cpu(&req->CreateContextsLength,
1616 sizeof(struct create_durable_handle_reconnect_v2));
1617 *num_iovec = num + 1;
1622 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1623 struct cifs_open_parms *oparms, bool use_persistent)
1625 struct smb2_create_req *req = iov[0].iov_base;
1626 unsigned int num = *num_iovec;
1628 if (use_persistent) {
1629 if (oparms->reconnect)
1630 return add_durable_reconnect_v2_context(iov, num_iovec,
1633 return add_durable_v2_context(iov, num_iovec, oparms);
1636 if (oparms->reconnect) {
1637 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1638 /* indicate that we don't need to relock the file */
1639 oparms->reconnect = false;
1641 iov[num].iov_base = create_durable_buf();
1642 if (iov[num].iov_base == NULL)
1644 iov[num].iov_len = sizeof(struct create_durable);
1645 if (!req->CreateContextsOffset)
1646 req->CreateContextsOffset =
1647 cpu_to_le32(sizeof(struct smb2_create_req) +
1649 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
1650 *num_iovec = num + 1;
1655 alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
1656 const char *treename, const __le16 *path)
1658 int treename_len, path_len;
1659 struct nls_table *cp;
1660 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1665 treename_len = strlen(treename);
1666 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
1672 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
1675 * make room for one path separator between the treename and
1678 *out_len = treename_len + 1 + path_len;
1681 * final path needs to be null-terminated UTF16 with a
1685 *out_size = roundup((*out_len+1)*2, 8);
1686 *out_path = kzalloc(*out_size, GFP_KERNEL);
1690 cp = load_nls_default();
1691 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
1692 UniStrcat(*out_path, sep);
1693 UniStrcat(*out_path, path);
1700 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
1701 __u8 *oplock, struct smb2_file_all_info *buf,
1702 struct smb2_err_rsp **err_buf)
1704 struct smb2_create_req *req;
1705 struct smb2_create_rsp *rsp;
1706 struct TCP_Server_Info *server;
1707 struct cifs_tcon *tcon = oparms->tcon;
1708 struct cifs_ses *ses = tcon->ses;
1710 struct kvec rsp_iov = {NULL, 0};
1713 __le16 *copy_path = NULL;
1716 unsigned int n_iov = 2;
1717 __u32 file_attributes = 0;
1718 char *dhc_buf = NULL, *lc_buf = NULL;
1720 unsigned int total_len;
1722 cifs_dbg(FYI, "create/open\n");
1724 if (ses && (ses->server))
1725 server = ses->server;
1729 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
1734 if (encryption_required(tcon))
1735 flags |= CIFS_TRANSFORM_REQ;
1737 if (oparms->create_options & CREATE_OPTION_READONLY)
1738 file_attributes |= ATTR_READONLY;
1739 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1740 file_attributes |= ATTR_SYSTEM;
1742 req->ImpersonationLevel = IL_IMPERSONATION;
1743 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
1744 /* File attributes ignored on open (used in create though) */
1745 req->FileAttributes = cpu_to_le32(file_attributes);
1746 req->ShareAccess = FILE_SHARE_ALL_LE;
1747 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1748 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
1750 iov[0].iov_base = (char *)req;
1751 /* -1 since last byte is buf[0] which is sent below (path) */
1752 iov[0].iov_len = total_len - 1;
1754 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
1756 /* [MS-SMB2] 2.2.13 NameOffset:
1757 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1758 * the SMB2 header, the file name includes a prefix that will
1759 * be processed during DFS name normalization as specified in
1760 * section 3.3.5.9. Otherwise, the file name is relative to
1761 * the share that is identified by the TreeId in the SMB2
1764 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
1767 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
1768 rc = alloc_path_with_tree_prefix(©_path, ©_size,
1770 tcon->treeName, path);
1772 cifs_small_buf_release(req);
1775 req->NameLength = cpu_to_le16(name_len * 2);
1776 uni_path_len = copy_size;
1779 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1780 /* MUST set path len (NameLength) to 0 opening root of share */
1781 req->NameLength = cpu_to_le16(uni_path_len - 2);
1782 if (uni_path_len % 8 != 0) {
1783 copy_size = roundup(uni_path_len, 8);
1784 copy_path = kzalloc(copy_size, GFP_KERNEL);
1786 cifs_small_buf_release(req);
1789 memcpy((char *)copy_path, (const char *)path,
1791 uni_path_len = copy_size;
1796 iov[1].iov_len = uni_path_len;
1797 iov[1].iov_base = path;
1799 if (!server->oplocks)
1800 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1802 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
1803 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1804 req->RequestedOplockLevel = *oplock;
1806 rc = add_lease_context(server, iov, &n_iov, oplock);
1808 cifs_small_buf_release(req);
1812 lc_buf = iov[n_iov-1].iov_base;
1815 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1816 /* need to set Next field of lease context if we request it */
1817 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
1818 struct create_context *ccontext =
1819 (struct create_context *)iov[n_iov-1].iov_base;
1821 cpu_to_le32(server->vals->create_lease_size);
1824 rc = add_durable_context(iov, &n_iov, oparms,
1825 tcon->use_persistent);
1827 cifs_small_buf_release(req);
1832 dhc_buf = iov[n_iov-1].iov_base;
1835 rc = smb2_send_recv(xid, ses, iov, n_iov, &resp_buftype, flags,
1837 cifs_small_buf_release(req);
1838 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
1841 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1843 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1848 oparms->fid->persistent_fid = rsp->PersistentFileId;
1849 oparms->fid->volatile_fid = rsp->VolatileFileId;
1852 memcpy(buf, &rsp->CreationTime, 32);
1853 buf->AllocationSize = rsp->AllocationSize;
1854 buf->EndOfFile = rsp->EndofFile;
1855 buf->Attributes = rsp->FileAttributes;
1856 buf->NumberOfLinks = cpu_to_le32(1);
1857 buf->DeletePending = 0;
1860 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1861 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
1863 *oplock = rsp->OplockLevel;
1868 free_rsp_buf(resp_buftype, rsp);
1873 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1876 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1877 u64 volatile_fid, u32 opcode, bool is_fsctl,
1878 char *in_data, u32 indatalen,
1879 char **out_data, u32 *plen /* returned data len */)
1881 struct smb2_ioctl_req *req;
1882 struct smb2_ioctl_rsp *rsp;
1883 struct smb2_sync_hdr *shdr;
1884 struct cifs_ses *ses;
1886 struct kvec rsp_iov;
1891 unsigned int total_len;
1893 cifs_dbg(FYI, "SMB2 IOCTL\n");
1895 if (out_data != NULL)
1898 /* zero out returned data len, in case of error */
1907 if (!ses || !(ses->server))
1910 rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len);
1914 if (encryption_required(tcon))
1915 flags |= CIFS_TRANSFORM_REQ;
1917 req->CtlCode = cpu_to_le32(opcode);
1918 req->PersistentFileId = persistent_fid;
1919 req->VolatileFileId = volatile_fid;
1922 req->InputCount = cpu_to_le32(indatalen);
1923 /* do not set InputOffset if no input data */
1925 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
1926 iov[1].iov_base = in_data;
1927 iov[1].iov_len = indatalen;
1932 req->OutputOffset = 0;
1933 req->OutputCount = 0; /* MBZ */
1936 * Could increase MaxOutputResponse, but that would require more
1937 * than one credit. Windows typically sets this smaller, but for some
1938 * ioctls it may be useful to allow server to send more. No point
1939 * limiting what the server can send as long as fits in one credit
1940 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
1941 * (by default, note that it can be overridden to make max larger)
1942 * in responses (except for read responses which can be bigger.
1943 * We may want to bump this limit up
1945 req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize);
1948 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1952 iov[0].iov_base = (char *)req;
1955 * If no input data, the size of ioctl struct in
1956 * protocol spec still includes a 1 byte data buffer,
1957 * but if input data passed to ioctl, we do not
1958 * want to double count this, so we do not send
1959 * the dummy one byte of data in iovec[0] if sending
1960 * input data (in iovec[1]).
1964 iov[0].iov_len = total_len - 1;
1966 iov[0].iov_len = total_len;
1968 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
1969 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
1970 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1972 rc = smb2_send_recv(xid, ses, iov, n_iov, &resp_buftype, flags,
1974 cifs_small_buf_release(req);
1975 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
1977 if ((rc != 0) && (rc != -EINVAL)) {
1978 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1980 } else if (rc == -EINVAL) {
1981 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1982 (opcode != FSCTL_SRV_COPYCHUNK)) {
1983 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1988 /* check if caller wants to look at return data or just return rc */
1989 if ((plen == NULL) || (out_data == NULL))
1992 *plen = le32_to_cpu(rsp->OutputCount);
1994 /* We check for obvious errors in the output buffer length and offset */
1996 goto ioctl_exit; /* server returned no data */
1997 else if (*plen > 0xFF00) {
1998 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
2004 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
2005 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
2006 le32_to_cpu(rsp->OutputOffset));
2012 *out_data = kmalloc(*plen, GFP_KERNEL);
2013 if (*out_data == NULL) {
2018 shdr = get_sync_hdr(rsp);
2019 memcpy(*out_data, (char *)shdr + le32_to_cpu(rsp->OutputOffset), *plen);
2021 free_rsp_buf(resp_buftype, rsp);
2026 * Individual callers to ioctl worker function follow
2030 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2031 u64 persistent_fid, u64 volatile_fid)
2034 struct compress_ioctl fsctl_input;
2035 char *ret_data = NULL;
2037 fsctl_input.CompressionState =
2038 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
2040 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
2041 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
2042 (char *)&fsctl_input /* data input */,
2043 2 /* in data len */, &ret_data /* out data */, NULL);
2045 cifs_dbg(FYI, "set compression rc %d\n", rc);
2051 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
2052 u64 persistent_fid, u64 volatile_fid)
2054 struct smb2_close_req *req;
2055 struct smb2_close_rsp *rsp;
2056 struct cifs_ses *ses = tcon->ses;
2058 struct kvec rsp_iov;
2062 unsigned int total_len;
2064 cifs_dbg(FYI, "Close\n");
2066 if (!ses || !(ses->server))
2069 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len);
2073 if (encryption_required(tcon))
2074 flags |= CIFS_TRANSFORM_REQ;
2076 req->PersistentFileId = persistent_fid;
2077 req->VolatileFileId = volatile_fid;
2079 iov[0].iov_base = (char *)req;
2080 iov[0].iov_len = total_len;
2082 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
2083 cifs_small_buf_release(req);
2084 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2087 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
2091 /* BB FIXME - decode close response, update inode for caching */
2094 free_rsp_buf(resp_buftype, rsp);
2099 validate_buf(unsigned int offset, unsigned int buffer_length,
2100 struct smb2_hdr *hdr, unsigned int min_buf_size)
2103 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
2104 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
2105 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
2106 char *end_of_buf = begin_of_buf + buffer_length;
2109 if (buffer_length < min_buf_size) {
2110 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2111 buffer_length, min_buf_size);
2115 /* check if beyond RFC1001 maximum length */
2116 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
2117 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2118 buffer_length, smb_len);
2122 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
2123 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
2131 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2132 * Caller must free buffer.
2135 validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
2136 struct smb2_hdr *hdr, unsigned int minbufsize,
2140 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
2146 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
2150 memcpy(data, begin_of_buf, buffer_length);
2156 query_info(const unsigned int xid, struct cifs_tcon *tcon,
2157 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
2158 u32 additional_info, size_t output_len, size_t min_len, void **data,
2161 struct smb2_query_info_req *req;
2162 struct smb2_query_info_rsp *rsp = NULL;
2164 struct kvec rsp_iov;
2167 struct cifs_ses *ses = tcon->ses;
2169 unsigned int total_len;
2171 cifs_dbg(FYI, "Query Info\n");
2173 if (!ses || !(ses->server))
2176 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
2181 if (encryption_required(tcon))
2182 flags |= CIFS_TRANSFORM_REQ;
2184 req->InfoType = info_type;
2185 req->FileInfoClass = info_class;
2186 req->PersistentFileId = persistent_fid;
2187 req->VolatileFileId = volatile_fid;
2188 req->AdditionalInformation = cpu_to_le32(additional_info);
2191 * We do not use the input buffer (do not send extra byte)
2193 req->InputBufferOffset = 0;
2195 req->OutputBufferLength = cpu_to_le32(output_len);
2197 iov[0].iov_base = (char *)req;
2199 iov[0].iov_len = total_len - 1;
2201 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
2202 cifs_small_buf_release(req);
2203 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2206 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2211 *dlen = le32_to_cpu(rsp->OutputBufferLength);
2213 *data = kmalloc(*dlen, GFP_KERNEL);
2216 "Error %d allocating memory for acl\n",
2224 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
2225 le32_to_cpu(rsp->OutputBufferLength),
2226 &rsp->hdr, min_len, *data);
2229 free_rsp_buf(resp_buftype, rsp);
2233 int SMB2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
2234 u64 persistent_fid, u64 volatile_fid,
2235 int ea_buf_size, struct smb2_file_full_ea_info *data)
2237 return query_info(xid, tcon, persistent_fid, volatile_fid,
2238 FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 0,
2240 sizeof(struct smb2_file_full_ea_info),
2245 int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2246 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
2248 return query_info(xid, tcon, persistent_fid, volatile_fid,
2249 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
2250 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
2251 sizeof(struct smb2_file_all_info), (void **)&data,
2256 SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
2257 u64 persistent_fid, u64 volatile_fid,
2258 void **data, u32 *plen)
2260 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
2263 return query_info(xid, tcon, persistent_fid, volatile_fid,
2264 0, SMB2_O_INFO_SECURITY, additional_info,
2265 SMB2_MAX_BUFFER_SIZE,
2266 sizeof(struct smb2_file_all_info), data, plen);
2270 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2271 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2273 return query_info(xid, tcon, persistent_fid, volatile_fid,
2274 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
2275 sizeof(struct smb2_file_internal_info),
2276 sizeof(struct smb2_file_internal_info),
2277 (void **)&uniqueid, NULL);
2281 * This is a no-op for now. We're not really interested in the reply, but
2282 * rather in the fact that the server sent one and that server->lstrp
2285 * FIXME: maybe we should consider checking that the reply matches request?
2288 smb2_echo_callback(struct mid_q_entry *mid)
2290 struct TCP_Server_Info *server = mid->callback_data;
2291 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
2292 unsigned int credits_received = 1;
2294 if (mid->mid_state == MID_RESPONSE_RECEIVED)
2295 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
2297 DeleteMidQEntry(mid);
2298 add_credits(server, credits_received, CIFS_ECHO_OP);
2301 void smb2_reconnect_server(struct work_struct *work)
2303 struct TCP_Server_Info *server = container_of(work,
2304 struct TCP_Server_Info, reconnect.work);
2305 struct cifs_ses *ses;
2306 struct cifs_tcon *tcon, *tcon2;
2307 struct list_head tmp_list;
2308 int tcon_exist = false;
2310 int resched = false;
2313 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2314 mutex_lock(&server->reconnect_mutex);
2316 INIT_LIST_HEAD(&tmp_list);
2317 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2319 spin_lock(&cifs_tcp_ses_lock);
2320 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2321 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2322 if (tcon->need_reconnect || tcon->need_reopen_files) {
2324 list_add_tail(&tcon->rlist, &tmp_list);
2328 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
2329 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
2334 * Get the reference to server struct to be sure that the last call of
2335 * cifs_put_tcon() in the loop below won't release the server pointer.
2338 server->srv_count++;
2340 spin_unlock(&cifs_tcp_ses_lock);
2342 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
2343 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
2345 cifs_reopen_persistent_handles(tcon);
2348 list_del_init(&tcon->rlist);
2349 cifs_put_tcon(tcon);
2352 cifs_dbg(FYI, "Reconnecting tcons finished\n");
2354 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
2355 mutex_unlock(&server->reconnect_mutex);
2357 /* now we can safely release srv struct */
2359 cifs_put_tcp_session(server, 1);
2363 SMB2_echo(struct TCP_Server_Info *server)
2365 struct smb2_echo_req *req;
2368 struct smb_rqst rqst = { .rq_iov = iov,
2370 unsigned int total_len;
2371 __be32 rfc1002_marker;
2373 cifs_dbg(FYI, "In echo request\n");
2375 if (server->tcpStatus == CifsNeedNegotiate) {
2376 /* No need to send echo on newly established connections */
2377 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2381 rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len);
2385 req->sync_hdr.CreditRequest = cpu_to_le16(1);
2388 rfc1002_marker = cpu_to_be32(total_len);
2389 iov[0].iov_base = &rfc1002_marker;
2390 iov[1].iov_len = total_len;
2391 iov[1].iov_base = (char *)req;
2393 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
2394 server, CIFS_ECHO_OP);
2396 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
2398 cifs_small_buf_release(req);
2403 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2406 struct smb2_flush_req *req;
2407 struct cifs_ses *ses = tcon->ses;
2409 struct kvec rsp_iov;
2413 unsigned int total_len;
2415 cifs_dbg(FYI, "Flush\n");
2417 if (!ses || !(ses->server))
2420 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len);
2424 if (encryption_required(tcon))
2425 flags |= CIFS_TRANSFORM_REQ;
2427 req->PersistentFileId = persistent_fid;
2428 req->VolatileFileId = volatile_fid;
2430 iov[0].iov_base = (char *)req;
2431 iov[0].iov_len = total_len;
2433 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
2434 cifs_small_buf_release(req);
2437 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
2439 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
2444 * To form a chain of read requests, any read requests after the first should
2445 * have the end_of_chain boolean set to true.
2448 smb2_new_read_req(void **buf, unsigned int *total_len,
2449 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
2450 unsigned int remaining_bytes, int request_type)
2453 struct smb2_read_plain_req *req = NULL;
2454 struct smb2_sync_hdr *shdr;
2455 struct TCP_Server_Info *server;
2457 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
2462 server = io_parms->tcon->ses->server;
2464 return -ECONNABORTED;
2466 shdr = &req->sync_hdr;
2467 shdr->ProcessId = cpu_to_le32(io_parms->pid);
2469 req->PersistentFileId = io_parms->persistent_fid;
2470 req->VolatileFileId = io_parms->volatile_fid;
2471 req->ReadChannelInfoOffset = 0; /* reserved */
2472 req->ReadChannelInfoLength = 0; /* reserved */
2473 req->Channel = 0; /* reserved */
2474 req->MinimumCount = 0;
2475 req->Length = cpu_to_le32(io_parms->length);
2476 req->Offset = cpu_to_le64(io_parms->offset);
2477 #ifdef CONFIG_CIFS_SMB_DIRECT
2479 * If we want to do a RDMA write, fill in and append
2480 * smbd_buffer_descriptor_v1 to the end of read request
2482 if (server->rdma && rdata &&
2483 rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
2485 struct smbd_buffer_descriptor_v1 *v1;
2486 bool need_invalidate =
2487 io_parms->tcon->ses->server->dialect == SMB30_PROT_ID;
2489 rdata->mr = smbd_register_mr(
2490 server->smbd_conn, rdata->pages,
2491 rdata->nr_pages, rdata->tailsz,
2492 true, need_invalidate);
2496 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
2497 if (need_invalidate)
2498 req->Channel = SMB2_CHANNEL_RDMA_V1;
2499 req->ReadChannelInfoOffset =
2500 cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
2501 req->ReadChannelInfoLength =
2502 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
2503 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2504 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
2505 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
2506 v1->length = cpu_to_le32(rdata->mr->mr->length);
2508 *total_len += sizeof(*v1) - 1;
2511 if (request_type & CHAINED_REQUEST) {
2512 if (!(request_type & END_OF_CHAIN)) {
2513 /* next 8-byte aligned request */
2514 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
2515 shdr->NextCommand = cpu_to_le32(*total_len);
2516 } else /* END_OF_CHAIN */
2517 shdr->NextCommand = 0;
2518 if (request_type & RELATED_REQUEST) {
2519 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2521 * Related requests use info from previous read request
2524 shdr->SessionId = 0xFFFFFFFF;
2525 shdr->TreeId = 0xFFFFFFFF;
2526 req->PersistentFileId = 0xFFFFFFFF;
2527 req->VolatileFileId = 0xFFFFFFFF;
2530 if (remaining_bytes > io_parms->length)
2531 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2533 req->RemainingBytes = 0;
2540 smb2_readv_callback(struct mid_q_entry *mid)
2542 struct cifs_readdata *rdata = mid->callback_data;
2543 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2544 struct TCP_Server_Info *server = tcon->ses->server;
2545 struct smb2_sync_hdr *shdr =
2546 (struct smb2_sync_hdr *)rdata->iov[1].iov_base;
2547 unsigned int credits_received = 1;
2548 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2550 .rq_pages = rdata->pages,
2551 .rq_npages = rdata->nr_pages,
2552 .rq_pagesz = rdata->pagesz,
2553 .rq_tailsz = rdata->tailsz };
2555 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2556 __func__, mid->mid, mid->mid_state, rdata->result,
2559 switch (mid->mid_state) {
2560 case MID_RESPONSE_RECEIVED:
2561 credits_received = le16_to_cpu(shdr->CreditRequest);
2562 /* result already set, check signature */
2563 if (server->sign && !mid->decrypted) {
2566 rc = smb2_verify_signature(&rqst, server);
2568 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2571 /* FIXME: should this be counted toward the initiating task? */
2572 task_io_account_read(rdata->got_bytes);
2573 cifs_stats_bytes_read(tcon, rdata->got_bytes);
2575 case MID_REQUEST_SUBMITTED:
2576 case MID_RETRY_NEEDED:
2577 rdata->result = -EAGAIN;
2578 if (server->sign && rdata->got_bytes)
2579 /* reset bytes number since we can not check a sign */
2580 rdata->got_bytes = 0;
2581 /* FIXME: should this be counted toward the initiating task? */
2582 task_io_account_read(rdata->got_bytes);
2583 cifs_stats_bytes_read(tcon, rdata->got_bytes);
2586 if (rdata->result != -ENODATA)
2587 rdata->result = -EIO;
2589 #ifdef CONFIG_CIFS_SMB_DIRECT
2591 * If this rdata has a memmory registered, the MR can be freed
2592 * MR needs to be freed as soon as I/O finishes to prevent deadlock
2593 * because they have limited number and are used for future I/Os
2596 smbd_deregister_mr(rdata->mr);
2601 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
2603 queue_work(cifsiod_wq, &rdata->work);
2604 DeleteMidQEntry(mid);
2605 add_credits(server, credits_received, 0);
2608 /* smb2_async_readv - send an async read, and set up mid to handle result */
2610 smb2_async_readv(struct cifs_readdata *rdata)
2614 struct smb2_sync_hdr *shdr;
2615 struct cifs_io_parms io_parms;
2616 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2618 struct TCP_Server_Info *server;
2619 unsigned int total_len;
2622 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2623 __func__, rdata->offset, rdata->bytes);
2625 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2626 io_parms.offset = rdata->offset;
2627 io_parms.length = rdata->bytes;
2628 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2629 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2630 io_parms.pid = rdata->pid;
2632 server = io_parms.tcon->ses->server;
2634 rc = smb2_new_read_req(
2635 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
2637 if (rc == -EAGAIN && rdata->credits) {
2638 /* credits was reset by reconnect */
2640 /* reduce in_flight value since we won't send the req */
2641 spin_lock(&server->req_lock);
2642 server->in_flight--;
2643 spin_unlock(&server->req_lock);
2648 if (encryption_required(io_parms.tcon))
2649 flags |= CIFS_TRANSFORM_REQ;
2651 req_len = cpu_to_be32(total_len);
2653 rdata->iov[0].iov_base = &req_len;
2654 rdata->iov[0].iov_len = sizeof(__be32);
2655 rdata->iov[1].iov_base = buf;
2656 rdata->iov[1].iov_len = total_len;
2658 shdr = (struct smb2_sync_hdr *)buf;
2660 if (rdata->credits) {
2661 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
2662 SMB2_MAX_BUFFER_SIZE));
2663 shdr->CreditRequest = shdr->CreditCharge;
2664 spin_lock(&server->req_lock);
2665 server->credits += rdata->credits -
2666 le16_to_cpu(shdr->CreditCharge);
2667 spin_unlock(&server->req_lock);
2668 wake_up(&server->request_q);
2669 flags |= CIFS_HAS_CREDITS;
2672 kref_get(&rdata->refcount);
2673 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
2674 cifs_readv_receive, smb2_readv_callback,
2675 smb3_handle_read_data, rdata, flags);
2677 kref_put(&rdata->refcount, cifs_readdata_release);
2678 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
2681 cifs_small_buf_release(buf);
2686 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2687 unsigned int *nbytes, char **buf, int *buf_type)
2689 int resp_buftype, rc = -EACCES;
2690 struct smb2_read_plain_req *req = NULL;
2691 struct smb2_read_rsp *rsp = NULL;
2692 struct smb2_sync_hdr *shdr;
2694 struct kvec rsp_iov;
2695 unsigned int total_len;
2696 int flags = CIFS_LOG_ERROR;
2697 struct cifs_ses *ses = io_parms->tcon->ses;
2700 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
2704 if (encryption_required(io_parms->tcon))
2705 flags |= CIFS_TRANSFORM_REQ;
2707 iov[0].iov_base = (char *)req;
2708 iov[0].iov_len = total_len;
2710 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
2711 cifs_small_buf_release(req);
2713 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
2716 if (rc != -ENODATA) {
2717 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
2718 cifs_dbg(VFS, "Send error in read = %d\n", rc);
2720 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
2721 return rc == -ENODATA ? 0 : rc;
2724 *nbytes = le32_to_cpu(rsp->DataLength);
2725 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2726 (*nbytes > io_parms->length)) {
2727 cifs_dbg(FYI, "bad length %d for count %d\n",
2728 *nbytes, io_parms->length);
2733 shdr = get_sync_hdr(rsp);
2736 memcpy(*buf, (char *)shdr + rsp->DataOffset, *nbytes);
2737 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
2738 } else if (resp_buftype != CIFS_NO_BUFFER) {
2739 *buf = rsp_iov.iov_base;
2740 if (resp_buftype == CIFS_SMALL_BUFFER)
2741 *buf_type = CIFS_SMALL_BUFFER;
2742 else if (resp_buftype == CIFS_LARGE_BUFFER)
2743 *buf_type = CIFS_LARGE_BUFFER;
2749 * Check the mid_state and signature on received buffer (if any), and queue the
2750 * workqueue completion task.
2753 smb2_writev_callback(struct mid_q_entry *mid)
2755 struct cifs_writedata *wdata = mid->callback_data;
2756 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
2757 unsigned int written;
2758 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
2759 unsigned int credits_received = 1;
2761 switch (mid->mid_state) {
2762 case MID_RESPONSE_RECEIVED:
2763 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
2764 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
2765 if (wdata->result != 0)
2768 written = le32_to_cpu(rsp->DataLength);
2770 * Mask off high 16 bits when bytes written as returned
2771 * by the server is greater than bytes requested by the
2772 * client. OS/2 servers are known to set incorrect
2775 if (written > wdata->bytes)
2778 if (written < wdata->bytes)
2779 wdata->result = -ENOSPC;
2781 wdata->bytes = written;
2783 case MID_REQUEST_SUBMITTED:
2784 case MID_RETRY_NEEDED:
2785 wdata->result = -EAGAIN;
2788 wdata->result = -EIO;
2791 #ifdef CONFIG_CIFS_SMB_DIRECT
2793 * If this wdata has a memory registered, the MR can be freed
2794 * The number of MRs available is limited, it's important to recover
2795 * used MR as soon as I/O is finished. Hold MR longer in the later
2796 * I/O process can possibly result in I/O deadlock due to lack of MR
2797 * to send request on I/O retry
2800 smbd_deregister_mr(wdata->mr);
2805 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2807 queue_work(cifsiod_wq, &wdata->work);
2808 DeleteMidQEntry(mid);
2809 add_credits(tcon->ses->server, credits_received, 0);
2812 /* smb2_async_writev - send an async write, and set up mid to handle result */
2814 smb2_async_writev(struct cifs_writedata *wdata,
2815 void (*release)(struct kref *kref))
2817 int rc = -EACCES, flags = 0;
2818 struct smb2_write_req *req = NULL;
2819 struct smb2_sync_hdr *shdr;
2820 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
2821 struct TCP_Server_Info *server = tcon->ses->server;
2823 struct smb_rqst rqst = { };
2824 unsigned int total_len;
2825 __be32 rfc1002_marker;
2827 rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len);
2829 if (rc == -EAGAIN && wdata->credits) {
2830 /* credits was reset by reconnect */
2832 /* reduce in_flight value since we won't send the req */
2833 spin_lock(&server->req_lock);
2834 server->in_flight--;
2835 spin_unlock(&server->req_lock);
2837 goto async_writev_out;
2840 if (encryption_required(tcon))
2841 flags |= CIFS_TRANSFORM_REQ;
2843 shdr = (struct smb2_sync_hdr *)req;
2844 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
2846 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
2847 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
2848 req->WriteChannelInfoOffset = 0;
2849 req->WriteChannelInfoLength = 0;
2851 req->Offset = cpu_to_le64(wdata->offset);
2852 req->DataOffset = cpu_to_le16(
2853 offsetof(struct smb2_write_req, Buffer));
2854 req->RemainingBytes = 0;
2855 #ifdef CONFIG_CIFS_SMB_DIRECT
2857 * If we want to do a server RDMA read, fill in and append
2858 * smbd_buffer_descriptor_v1 to the end of write request
2860 if (server->rdma && wdata->bytes >=
2861 server->smbd_conn->rdma_readwrite_threshold) {
2863 struct smbd_buffer_descriptor_v1 *v1;
2864 bool need_invalidate = server->dialect == SMB30_PROT_ID;
2866 wdata->mr = smbd_register_mr(
2867 server->smbd_conn, wdata->pages,
2868 wdata->nr_pages, wdata->tailsz,
2869 false, need_invalidate);
2872 goto async_writev_out;
2875 req->DataOffset = 0;
2876 req->RemainingBytes =
2877 cpu_to_le32((wdata->nr_pages-1)*PAGE_SIZE + wdata->tailsz);
2878 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
2879 if (need_invalidate)
2880 req->Channel = SMB2_CHANNEL_RDMA_V1;
2881 req->WriteChannelInfoOffset =
2882 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
2883 req->WriteChannelInfoLength =
2884 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
2885 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2886 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
2887 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
2888 v1->length = cpu_to_le32(wdata->mr->mr->length);
2891 /* 4 for rfc1002 length field and 1 for Buffer */
2893 rfc1002_marker = cpu_to_be32(total_len - 1 + wdata->bytes);
2894 iov[0].iov_base = &rfc1002_marker;
2895 iov[1].iov_len = total_len - 1;
2896 iov[1].iov_base = (char *)req;
2900 rqst.rq_pages = wdata->pages;
2901 rqst.rq_npages = wdata->nr_pages;
2902 rqst.rq_pagesz = wdata->pagesz;
2903 rqst.rq_tailsz = wdata->tailsz;
2904 #ifdef CONFIG_CIFS_SMB_DIRECT
2906 iov[1].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
2910 cifs_dbg(FYI, "async write at %llu %u bytes\n",
2911 wdata->offset, wdata->bytes);
2913 #ifdef CONFIG_CIFS_SMB_DIRECT
2914 /* For RDMA read, I/O size is in RemainingBytes not in Length */
2916 req->Length = cpu_to_le32(wdata->bytes);
2918 req->Length = cpu_to_le32(wdata->bytes);
2921 if (wdata->credits) {
2922 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
2923 SMB2_MAX_BUFFER_SIZE));
2924 shdr->CreditRequest = shdr->CreditCharge;
2925 spin_lock(&server->req_lock);
2926 server->credits += wdata->credits -
2927 le16_to_cpu(shdr->CreditCharge);
2928 spin_unlock(&server->req_lock);
2929 wake_up(&server->request_q);
2930 flags |= CIFS_HAS_CREDITS;
2933 kref_get(&wdata->refcount);
2934 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
2938 kref_put(&wdata->refcount, release);
2939 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2943 cifs_small_buf_release(req);
2948 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2949 * The length field from io_parms must be at least 1 and indicates a number of
2950 * elements with data to write that begins with position 1 in iov array. All
2951 * data length is specified by count.
2954 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2955 unsigned int *nbytes, struct kvec *iov, int n_vec)
2958 struct smb2_write_req *req = NULL;
2959 struct smb2_write_rsp *rsp = NULL;
2961 struct kvec rsp_iov;
2963 unsigned int total_len;
2970 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req,
2975 if (io_parms->tcon->ses->server == NULL)
2976 return -ECONNABORTED;
2978 if (encryption_required(io_parms->tcon))
2979 flags |= CIFS_TRANSFORM_REQ;
2981 req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
2983 req->PersistentFileId = io_parms->persistent_fid;
2984 req->VolatileFileId = io_parms->volatile_fid;
2985 req->WriteChannelInfoOffset = 0;
2986 req->WriteChannelInfoLength = 0;
2988 req->Length = cpu_to_le32(io_parms->length);
2989 req->Offset = cpu_to_le64(io_parms->offset);
2990 req->DataOffset = cpu_to_le16(
2991 offsetof(struct smb2_write_req, Buffer));
2992 req->RemainingBytes = 0;
2994 iov[0].iov_base = (char *)req;
2996 iov[0].iov_len = total_len - 1;
2998 rc = smb2_send_recv(xid, io_parms->tcon->ses, iov, n_vec + 1,
2999 &resp_buftype, flags, &rsp_iov);
3000 cifs_small_buf_release(req);
3001 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
3004 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
3005 cifs_dbg(VFS, "Send error in write = %d\n", rc);
3007 *nbytes = le32_to_cpu(rsp->DataLength);
3009 free_rsp_buf(resp_buftype, rsp);
3014 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
3017 unsigned int entrycount = 0;
3018 unsigned int next_offset = 0;
3019 FILE_DIRECTORY_INFO *entryptr;
3021 if (bufstart == NULL)
3024 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
3027 entryptr = (FILE_DIRECTORY_INFO *)
3028 ((char *)entryptr + next_offset);
3030 if ((char *)entryptr + size > end_of_buf) {
3031 cifs_dbg(VFS, "malformed search entry would overflow\n");
3035 len = le32_to_cpu(entryptr->FileNameLength);
3036 if ((char *)entryptr + len + size > end_of_buf) {
3037 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
3042 *lastentry = (char *)entryptr;
3045 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
3057 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
3058 u64 persistent_fid, u64 volatile_fid, int index,
3059 struct cifs_search_info *srch_inf)
3061 struct smb2_query_directory_req *req;
3062 struct smb2_query_directory_rsp *rsp = NULL;
3064 struct kvec rsp_iov;
3067 int resp_buftype = CIFS_NO_BUFFER;
3068 unsigned char *bufptr;
3069 struct TCP_Server_Info *server;
3070 struct cifs_ses *ses = tcon->ses;
3071 __le16 asteriks = cpu_to_le16('*');
3073 unsigned int output_size = CIFSMaxBufSize;
3074 size_t info_buf_size;
3076 unsigned int total_len;
3078 if (ses && (ses->server))
3079 server = ses->server;
3083 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
3088 if (encryption_required(tcon))
3089 flags |= CIFS_TRANSFORM_REQ;
3091 switch (srch_inf->info_level) {
3092 case SMB_FIND_FILE_DIRECTORY_INFO:
3093 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
3094 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
3096 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
3097 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
3098 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
3101 cifs_dbg(VFS, "info level %u isn't supported\n",
3102 srch_inf->info_level);
3107 req->FileIndex = cpu_to_le32(index);
3108 req->PersistentFileId = persistent_fid;
3109 req->VolatileFileId = volatile_fid;
3112 bufptr = req->Buffer;
3113 memcpy(bufptr, &asteriks, len);
3115 req->FileNameOffset =
3116 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1);
3117 req->FileNameLength = cpu_to_le16(len);
3119 * BB could be 30 bytes or so longer if we used SMB2 specific
3120 * buffer lengths, but this is safe and close enough.
3122 output_size = min_t(unsigned int, output_size, server->maxBuf);
3123 output_size = min_t(unsigned int, output_size, 2 << 15);
3124 req->OutputBufferLength = cpu_to_le32(output_size);
3126 iov[0].iov_base = (char *)req;
3128 iov[0].iov_len = total_len - 1;
3130 iov[1].iov_base = (char *)(req->Buffer);
3131 iov[1].iov_len = len;
3133 rc = smb2_send_recv(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
3134 cifs_small_buf_release(req);
3135 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
3138 if (rc == -ENODATA &&
3139 rsp->hdr.sync_hdr.Status == STATUS_NO_MORE_FILES) {
3140 srch_inf->endOfSearch = true;
3143 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
3147 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
3148 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
3153 srch_inf->unicode = true;
3155 if (srch_inf->ntwrk_buf_start) {
3156 if (srch_inf->smallBuf)
3157 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
3159 cifs_buf_release(srch_inf->ntwrk_buf_start);
3161 srch_inf->ntwrk_buf_start = (char *)rsp;
3162 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
3163 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
3164 /* 4 for rfc1002 length field */
3165 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
3166 srch_inf->entries_in_buffer =
3167 num_entries(srch_inf->srch_entries_start, end_of_smb,
3168 &srch_inf->last_entry, info_buf_size);
3169 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
3170 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
3171 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
3172 srch_inf->srch_entries_start, srch_inf->last_entry);
3173 if (resp_buftype == CIFS_LARGE_BUFFER)
3174 srch_inf->smallBuf = false;
3175 else if (resp_buftype == CIFS_SMALL_BUFFER)
3176 srch_inf->smallBuf = true;
3178 cifs_dbg(VFS, "illegal search buffer type\n");
3183 free_rsp_buf(resp_buftype, rsp);
3188 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3189 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
3190 u8 info_type, u32 additional_info, unsigned int num,
3191 void **data, unsigned int *size)
3193 struct smb2_set_info_req *req;
3194 struct smb2_set_info_rsp *rsp = NULL;
3196 struct kvec rsp_iov;
3200 struct cifs_ses *ses = tcon->ses;
3202 unsigned int total_len;
3204 if (!ses || !(ses->server))
3210 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
3214 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len);
3220 if (encryption_required(tcon))
3221 flags |= CIFS_TRANSFORM_REQ;
3223 req->sync_hdr.ProcessId = cpu_to_le32(pid);
3225 req->InfoType = info_type;
3226 req->FileInfoClass = info_class;
3227 req->PersistentFileId = persistent_fid;
3228 req->VolatileFileId = volatile_fid;
3229 req->AdditionalInformation = cpu_to_le32(additional_info);
3232 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
3233 req->BufferLength = cpu_to_le32(*size);
3235 memcpy(req->Buffer, *data, *size);
3238 iov[0].iov_base = (char *)req;
3240 iov[0].iov_len = total_len - 1;
3242 for (i = 1; i < num; i++) {
3243 le32_add_cpu(&req->BufferLength, size[i]);
3244 iov[i].iov_base = (char *)data[i];
3245 iov[i].iov_len = size[i];
3248 rc = smb2_send_recv(xid, ses, iov, num, &resp_buftype, flags,
3250 cifs_small_buf_release(req);
3251 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
3254 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
3256 free_rsp_buf(resp_buftype, rsp);
3262 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
3263 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3265 struct smb2_file_rename_info info;
3267 unsigned int size[2];
3269 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3271 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3275 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
3276 /* 0 = fail if target already exists */
3277 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3278 info.FileNameLength = cpu_to_le32(len);
3281 size[0] = sizeof(struct smb2_file_rename_info);
3283 data[1] = target_file;
3284 size[1] = len + 2 /* null */;
3286 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
3287 current->tgid, FILE_RENAME_INFORMATION, SMB2_O_INFO_FILE,
3294 SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
3295 u64 persistent_fid, u64 volatile_fid)
3297 __u8 delete_pending = 1;
3301 data = &delete_pending;
3302 size = 1; /* sizeof __u8 */
3304 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3305 current->tgid, FILE_DISPOSITION_INFORMATION, SMB2_O_INFO_FILE,
3306 0, 1, &data, &size);
3310 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
3311 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3313 struct smb2_file_link_info info;
3315 unsigned int size[2];
3317 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3319 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3323 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
3324 /* 0 = fail if link already exists */
3325 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3326 info.FileNameLength = cpu_to_le32(len);
3329 size[0] = sizeof(struct smb2_file_link_info);
3331 data[1] = target_file;
3332 size[1] = len + 2 /* null */;
3334 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
3335 current->tgid, FILE_LINK_INFORMATION, SMB2_O_INFO_FILE,
3342 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3343 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
3345 struct smb2_file_eof_info info;
3349 info.EndOfFile = *eof;
3352 size = sizeof(struct smb2_file_eof_info);
3355 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3356 pid, FILE_ALLOCATION_INFORMATION, SMB2_O_INFO_FILE,
3357 0, 1, &data, &size);
3359 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3360 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
3361 0, 1, &data, &size);
3365 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3366 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
3369 size = sizeof(FILE_BASIC_INFO);
3370 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3371 current->tgid, FILE_BASIC_INFORMATION, SMB2_O_INFO_FILE,
3372 0, 1, (void **)&buf, &size);
3376 SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
3377 u64 persistent_fid, u64 volatile_fid,
3378 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
3380 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3381 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
3382 1, (void **)&pnntsd, &pacllen);
3386 SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
3387 u64 persistent_fid, u64 volatile_fid,
3388 struct smb2_file_full_ea_info *buf, int len)
3390 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3391 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
3392 0, 1, (void **)&buf, &len);
3396 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
3397 const u64 persistent_fid, const u64 volatile_fid,
3401 struct smb2_oplock_break_req *req = NULL;
3402 struct cifs_ses *ses = tcon->ses;
3403 int flags = CIFS_OBREAK_OP;
3404 unsigned int total_len;
3406 struct kvec rsp_iov;
3409 cifs_dbg(FYI, "SMB2_oplock_break\n");
3410 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
3415 if (encryption_required(tcon))
3416 flags |= CIFS_TRANSFORM_REQ;
3418 req->VolatileFid = volatile_fid;
3419 req->PersistentFid = persistent_fid;
3420 req->OplockLevel = oplock_level;
3421 req->sync_hdr.CreditRequest = cpu_to_le16(1);
3423 flags |= CIFS_NO_RESP;
3425 iov[0].iov_base = (char *)req;
3426 iov[0].iov_len = total_len;
3428 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
3429 cifs_small_buf_release(req);
3432 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
3433 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
3440 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
3441 struct kstatfs *kst)
3443 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
3444 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
3445 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
3446 kst->f_bfree = kst->f_bavail =
3447 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
3452 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
3453 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
3455 struct TCP_Server_Info *server = tcon->ses->server;
3457 struct smb2_query_info_req *req;
3458 unsigned int total_len;
3460 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
3462 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
3465 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
3470 req->InfoType = SMB2_O_INFO_FILESYSTEM;
3471 req->FileInfoClass = level;
3472 req->PersistentFileId = persistent_fid;
3473 req->VolatileFileId = volatile_fid;
3475 req->InputBufferOffset =
3476 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
3477 req->OutputBufferLength = cpu_to_le32(
3478 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - server->vals->header_preamble_size);
3480 iov->iov_base = (char *)req;
3481 iov->iov_len = total_len;
3486 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
3487 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
3489 struct smb2_query_info_rsp *rsp = NULL;
3491 struct kvec rsp_iov;
3494 struct cifs_ses *ses = tcon->ses;
3495 struct TCP_Server_Info *server = ses->server;
3496 struct smb2_fs_full_size_info *info = NULL;
3499 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
3500 sizeof(struct smb2_fs_full_size_info),
3501 persistent_fid, volatile_fid);
3505 if (encryption_required(tcon))
3506 flags |= CIFS_TRANSFORM_REQ;
3508 rc = smb2_send_recv(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
3509 cifs_small_buf_release(iov.iov_base);
3511 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3514 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
3516 info = (struct smb2_fs_full_size_info *)(server->vals->header_preamble_size +
3517 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
3518 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
3519 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
3520 sizeof(struct smb2_fs_full_size_info));
3522 copy_fs_info_to_kstatfs(info, fsdata);
3525 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3530 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
3531 u64 persistent_fid, u64 volatile_fid, int level)
3533 struct smb2_query_info_rsp *rsp = NULL;
3535 struct kvec rsp_iov;
3537 int resp_buftype, max_len, min_len;
3538 struct cifs_ses *ses = tcon->ses;
3539 struct TCP_Server_Info *server = ses->server;
3540 unsigned int rsp_len, offset;
3543 if (level == FS_DEVICE_INFORMATION) {
3544 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3545 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3546 } else if (level == FS_ATTRIBUTE_INFORMATION) {
3547 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
3548 min_len = MIN_FS_ATTR_INFO_SIZE;
3549 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
3550 max_len = sizeof(struct smb3_fs_ss_info);
3551 min_len = sizeof(struct smb3_fs_ss_info);
3553 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
3557 rc = build_qfs_info_req(&iov, tcon, level, max_len,
3558 persistent_fid, volatile_fid);
3562 if (encryption_required(tcon))
3563 flags |= CIFS_TRANSFORM_REQ;
3565 rc = smb2_send_recv(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
3566 cifs_small_buf_release(iov.iov_base);
3568 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3571 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
3573 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
3574 offset = le16_to_cpu(rsp->OutputBufferOffset);
3575 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
3579 if (level == FS_ATTRIBUTE_INFORMATION)
3580 memcpy(&tcon->fsAttrInfo, server->vals->header_preamble_size + offset
3581 + (char *)&rsp->hdr, min_t(unsigned int,
3583 else if (level == FS_DEVICE_INFORMATION)
3584 memcpy(&tcon->fsDevInfo, server->vals->header_preamble_size + offset
3585 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
3586 else if (level == FS_SECTOR_SIZE_INFORMATION) {
3587 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
3588 (server->vals->header_preamble_size + offset + (char *)&rsp->hdr);
3589 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
3590 tcon->perf_sector_size =
3591 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
3595 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3600 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
3601 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3602 const __u32 num_lock, struct smb2_lock_element *buf)
3605 struct smb2_lock_req *req = NULL;
3607 struct kvec rsp_iov;
3610 int flags = CIFS_NO_RESP;
3611 unsigned int total_len;
3613 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
3615 rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len);
3619 if (encryption_required(tcon))
3620 flags |= CIFS_TRANSFORM_REQ;
3622 req->sync_hdr.ProcessId = cpu_to_le32(pid);
3623 req->LockCount = cpu_to_le16(num_lock);
3625 req->PersistentFileId = persist_fid;
3626 req->VolatileFileId = volatile_fid;
3628 count = num_lock * sizeof(struct smb2_lock_element);
3630 iov[0].iov_base = (char *)req;
3631 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
3632 iov[1].iov_base = (char *)buf;
3633 iov[1].iov_len = count;
3635 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
3636 rc = smb2_send_recv(xid, tcon->ses, iov, 2, &resp_buf_type, flags,
3638 cifs_small_buf_release(req);
3640 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
3641 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
3648 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
3649 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3650 const __u64 length, const __u64 offset, const __u32 lock_flags,
3653 struct smb2_lock_element lock;
3655 lock.Offset = cpu_to_le64(offset);
3656 lock.Length = cpu_to_le64(length);
3657 lock.Flags = cpu_to_le32(lock_flags);
3658 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
3659 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
3661 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
3665 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
3666 __u8 *lease_key, const __le32 lease_state)
3669 struct smb2_lease_ack *req = NULL;
3670 struct cifs_ses *ses = tcon->ses;
3671 int flags = CIFS_OBREAK_OP;
3672 unsigned int total_len;
3674 struct kvec rsp_iov;
3677 cifs_dbg(FYI, "SMB2_lease_break\n");
3678 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
3683 if (encryption_required(tcon))
3684 flags |= CIFS_TRANSFORM_REQ;
3686 req->sync_hdr.CreditRequest = cpu_to_le16(1);
3687 req->StructureSize = cpu_to_le16(36);
3690 memcpy(req->LeaseKey, lease_key, 16);
3691 req->LeaseState = lease_state;
3693 flags |= CIFS_NO_RESP;
3695 iov[0].iov_base = (char *)req;
3696 iov[0].iov_len = total_len;
3698 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
3699 cifs_small_buf_release(req);
3702 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
3703 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);