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/pagemap.h>
37 #include <linux/xattr.h>
41 #include "cifsproto.h"
42 #include "smb2proto.h"
43 #include "cifs_unicode.h"
44 #include "cifs_debug.h"
46 #include "smb2status.h"
49 #include "cifs_spnego.h"
52 * The following table defines the expected "StructureSize" of SMB2 requests
53 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
55 * Note that commands are defined in smb2pdu.h in le16 but the array below is
56 * indexed by command in host byte order.
58 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
59 /* SMB2_NEGOTIATE */ 36,
60 /* SMB2_SESSION_SETUP */ 25,
62 /* SMB2_TREE_CONNECT */ 9,
63 /* SMB2_TREE_DISCONNECT */ 4,
73 /* SMB2_QUERY_DIRECTORY */ 33,
74 /* SMB2_CHANGE_NOTIFY */ 32,
75 /* SMB2_QUERY_INFO */ 41,
76 /* SMB2_SET_INFO */ 33,
77 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
80 static int encryption_required(const struct cifs_tcon
*tcon
)
84 if ((tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
) ||
85 (tcon
->share_flags
& SHI1005_FLAGS_ENCRYPT_DATA
))
88 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
94 smb2_hdr_assemble(struct smb2_sync_hdr
*shdr
, __le16 smb2_cmd
,
95 const struct cifs_tcon
*tcon
)
97 shdr
->ProtocolId
= SMB2_PROTO_NUMBER
;
98 shdr
->StructureSize
= cpu_to_le16(64);
99 shdr
->Command
= smb2_cmd
;
100 if (tcon
&& tcon
->ses
&& tcon
->ses
->server
) {
101 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
103 spin_lock(&server
->req_lock
);
104 /* Request up to 2 credits but don't go over the limit. */
105 if (server
->credits
>= server
->max_credits
)
106 shdr
->CreditRequest
= cpu_to_le16(0);
108 shdr
->CreditRequest
= cpu_to_le16(
109 min_t(int, server
->max_credits
-
110 server
->credits
, 2));
111 spin_unlock(&server
->req_lock
);
113 shdr
->CreditRequest
= cpu_to_le16(2);
115 shdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
120 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
121 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
122 if ((tcon
->ses
) && (tcon
->ses
->server
) &&
123 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
124 shdr
->CreditCharge
= cpu_to_le16(1);
125 /* else CreditCharge MBZ */
127 shdr
->TreeId
= tcon
->tid
;
128 /* Uid is not converted */
130 shdr
->SessionId
= tcon
->ses
->Suid
;
133 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
134 * to pass the path on the Open SMB prefixed by \\server\share.
135 * Not sure when we would need to do the augmented path (if ever) and
136 * setting this flag breaks the SMB2 open operation since it is
137 * illegal to send an empty path name (without \\server\share prefix)
138 * when the DFS flag is set in the SMB open header. We could
139 * consider setting the flag on all operations other than open
140 * but it is safer to net set it for now.
142 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
143 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
145 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
&&
146 !encryption_required(tcon
))
147 shdr
->Flags
|= SMB2_FLAGS_SIGNED
;
153 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
156 struct nls_table
*nls_codepage
;
157 struct cifs_ses
*ses
;
158 struct TCP_Server_Info
*server
;
161 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
162 * check for tcp and smb session status done differently
163 * for those three - in the calling routine.
168 if (smb2_command
== SMB2_TREE_CONNECT
)
171 if (tcon
->tidStatus
== CifsExiting
) {
173 * only tree disconnect, open, and write,
174 * (and ulogoff which does not have tcon)
175 * are allowed as we start force umount.
177 if ((smb2_command
!= SMB2_WRITE
) &&
178 (smb2_command
!= SMB2_CREATE
) &&
179 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
180 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
185 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
186 (!tcon
->ses
->server
))
190 server
= ses
->server
;
193 * Give demultiplex thread up to 10 seconds to reconnect, should be
194 * greater than cifs socket timeout which is 7 seconds
196 while (server
->tcpStatus
== CifsNeedReconnect
) {
198 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
199 * here since they are implicitly done when session drops.
201 switch (smb2_command
) {
203 * BB Should we keep oplock break and add flush to exceptions?
205 case SMB2_TREE_DISCONNECT
:
208 case SMB2_OPLOCK_BREAK
:
212 wait_event_interruptible_timeout(server
->response_q
,
213 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
215 /* are we still trying to reconnect? */
216 if (server
->tcpStatus
!= CifsNeedReconnect
)
220 * on "soft" mounts we wait once. Hard mounts keep
221 * retrying until process is killed or server comes
225 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
230 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
233 nls_codepage
= load_nls_default();
236 * need to prevent multiple threads trying to simultaneously reconnect
237 * the same SMB session
239 mutex_lock(&tcon
->ses
->session_mutex
);
240 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
241 if (!rc
&& tcon
->ses
->need_reconnect
)
242 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
244 if (rc
|| !tcon
->need_reconnect
) {
245 mutex_unlock(&tcon
->ses
->session_mutex
);
249 cifs_mark_open_files_invalid(tcon
);
250 if (tcon
->use_persistent
)
251 tcon
->need_reopen_files
= true;
253 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
254 mutex_unlock(&tcon
->ses
->session_mutex
);
256 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
260 if (smb2_command
!= SMB2_INTERNAL_CMD
)
261 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
263 atomic_inc(&tconInfoReconnectCount
);
266 * Check if handle based operation so we know whether we can continue
267 * or not without returning to caller to reset file handle.
270 * BB Is flush done by server on drop of tcp session? Should we special
271 * case it and skip above?
273 switch (smb2_command
) {
279 case SMB2_QUERY_DIRECTORY
:
280 case SMB2_CHANGE_NOTIFY
:
281 case SMB2_QUERY_INFO
:
285 unload_nls(nls_codepage
);
290 fill_small_buf(__le16 smb2_command
, struct cifs_tcon
*tcon
, void *buf
,
291 unsigned int *total_len
)
293 struct smb2_sync_pdu
*spdu
= (struct smb2_sync_pdu
*)buf
;
294 /* lookup word count ie StructureSize from table */
295 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_command
)];
298 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
299 * largest operations (Create)
303 smb2_hdr_assemble(&spdu
->sync_hdr
, smb2_command
, tcon
);
304 spdu
->StructureSize2
= cpu_to_le16(parmsize
);
306 *total_len
= parmsize
+ sizeof(struct smb2_sync_hdr
);
309 /* init request without RFC1001 length at the beginning */
311 smb2_plain_req_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
312 void **request_buf
, unsigned int *total_len
)
315 struct smb2_sync_hdr
*shdr
;
317 rc
= smb2_reconnect(smb2_command
, tcon
);
321 /* BB eventually switch this to SMB2 specific small buf size */
322 *request_buf
= cifs_small_buf_get();
323 if (*request_buf
== NULL
) {
324 /* BB should we add a retry in here if not a writepage? */
328 shdr
= (struct smb2_sync_hdr
*)(*request_buf
);
330 fill_small_buf(smb2_command
, tcon
, shdr
, total_len
);
333 #ifdef CONFIG_CIFS_STATS2
334 uint16_t com_code
= le16_to_cpu(smb2_command
);
336 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
338 cifs_stats_inc(&tcon
->num_smbs_sent
);
345 * Allocate and return pointer to an SMB request hdr, and set basic
346 * SMB information in the SMB header. If the return code is zero, this
347 * function must have filled in request_buf pointer. The returned buffer
348 * has RFC1001 length at the beginning.
351 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
355 unsigned int total_len
;
356 struct smb2_pdu
*pdu
;
358 rc
= smb2_reconnect(smb2_command
, tcon
);
362 /* BB eventually switch this to SMB2 specific small buf size */
363 *request_buf
= cifs_small_buf_get();
364 if (*request_buf
== NULL
) {
365 /* BB should we add a retry in here if not a writepage? */
369 pdu
= (struct smb2_pdu
*)(*request_buf
);
371 fill_small_buf(smb2_command
, tcon
, get_sync_hdr(pdu
), &total_len
);
373 /* Note this is only network field converted to big endian */
374 pdu
->hdr
.smb2_buf_length
= cpu_to_be32(total_len
);
377 #ifdef CONFIG_CIFS_STATS2
378 uint16_t com_code
= le16_to_cpu(smb2_command
);
379 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
381 cifs_stats_inc(&tcon
->num_smbs_sent
);
387 #ifdef CONFIG_CIFS_SMB311
388 /* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
389 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
392 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
393 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
396 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
398 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
399 pneg_ctxt
->DataLength
= cpu_to_le16(38);
400 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
401 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
402 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
403 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
407 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
409 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
410 pneg_ctxt
->DataLength
= cpu_to_le16(6);
411 pneg_ctxt
->CipherCount
= cpu_to_le16(2);
412 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_GCM
;
413 pneg_ctxt
->Ciphers
[1] = SMB2_ENCRYPTION_AES128_CCM
;
417 assemble_neg_contexts(struct smb2_negotiate_req
*req
)
420 /* +4 is to account for the RFC1001 len field */
421 char *pneg_ctxt
= (char *)req
+ OFFSET_OF_NEG_CONTEXT
+ 4;
423 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
424 /* Add 2 to size to round to 8 byte boundary */
425 pneg_ctxt
+= 2 + sizeof(struct smb2_preauth_neg_context
);
426 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
427 req
->NegotiateContextOffset
= cpu_to_le32(OFFSET_OF_NEG_CONTEXT
);
428 req
->NegotiateContextCount
= cpu_to_le16(2);
429 inc_rfc1001_len(req
, 4 + sizeof(struct smb2_preauth_neg_context
) + 2
430 + sizeof(struct smb2_encryption_neg_context
)); /* calculate hash */
433 static void assemble_neg_contexts(struct smb2_negotiate_req
*req
)
441 * SMB2 Worker functions follow:
443 * The general structure of the worker functions is:
444 * 1) Call smb2_init (assembles SMB2 header)
445 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
446 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
447 * 4) Decode SMB2 command specific fields in the fixed length area
448 * 5) Decode variable length data area (if any for this SMB2 command type)
449 * 6) Call free smb buffer
455 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
457 struct smb2_negotiate_req
*req
;
458 struct smb2_negotiate_rsp
*rsp
;
463 struct TCP_Server_Info
*server
= ses
->server
;
464 int blob_offset
, blob_length
;
466 int flags
= CIFS_NEG_OP
;
468 cifs_dbg(FYI
, "Negotiate protocol\n");
471 WARN(1, "%s: server is NULL!\n", __func__
);
475 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
479 req
->hdr
.sync_hdr
.SessionId
= 0;
481 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
483 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
484 inc_rfc1001_len(req
, 2);
486 /* only one of SMB2 signing flags may be set in SMB2 request */
488 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
489 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
490 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
492 req
->SecurityMode
= 0;
494 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
496 /* ClientGUID must be zero for SMB2.02 dialect */
497 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
498 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
500 memcpy(req
->ClientGUID
, server
->client_guid
,
501 SMB2_CLIENT_GUID_SIZE
);
502 if (ses
->server
->vals
->protocol_id
== SMB311_PROT_ID
)
503 assemble_neg_contexts(req
);
505 iov
[0].iov_base
= (char *)req
;
506 /* 4 for rfc1002 length field */
507 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
509 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
510 cifs_small_buf_release(req
);
511 rsp
= (struct smb2_negotiate_rsp
*)rsp_iov
.iov_base
;
513 * No tcon so can't do
514 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
519 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
521 /* BB we may eventually want to match the negotiated vs. requested
522 dialect, even though we are only requesting one at a time */
523 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
524 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
525 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
526 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
527 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
528 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
529 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
530 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
531 #ifdef CONFIG_CIFS_SMB311
532 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
533 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
536 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
537 le16_to_cpu(rsp
->DialectRevision
));
541 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
543 /* SMB2 only has an extended negflavor */
544 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
545 /* set it to the maximum buffer size value we can send with 1 credit */
546 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
547 SMB2_MAX_BUFFER_SIZE
);
548 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
549 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
550 /* BB Do we need to validate the SecurityMode? */
551 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
552 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
554 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
556 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
559 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
561 * ses->sectype = RawNTLMSSP;
562 * but for time being this is our only auth choice so doesn't matter.
563 * We just found a server which sets blob length to zero expecting raw.
565 if (blob_length
== 0) {
566 cifs_dbg(FYI
, "missing security blob on negprot\n");
567 server
->sec_ntlmssp
= true;
570 rc
= cifs_enable_signing(server
, ses
->sign
);
574 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
581 free_rsp_buf(resp_buftype
, rsp
);
585 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
588 struct validate_negotiate_info_req vneg_inbuf
;
589 struct validate_negotiate_info_rsp
*pneg_rsp
;
592 cifs_dbg(FYI
, "validate negotiate\n");
595 * validation ioctl must be signed, so no point sending this if we
596 * can not sign it. We could eventually change this to selectively
597 * sign just this, the first and only signed request on a connection.
598 * This is good enough for now since a user who wants better security
599 * would also enable signing on the mount. Having validation of
600 * negotiate info for signed connections helps reduce attack vectors
602 if (tcon
->ses
->server
->sign
== false)
603 return 0; /* validation requires signing */
605 vneg_inbuf
.Capabilities
=
606 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
607 memcpy(vneg_inbuf
.Guid
, tcon
->ses
->server
->client_guid
,
608 SMB2_CLIENT_GUID_SIZE
);
611 vneg_inbuf
.SecurityMode
=
612 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
613 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
614 vneg_inbuf
.SecurityMode
=
615 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
617 vneg_inbuf
.SecurityMode
= 0;
619 vneg_inbuf
.DialectCount
= cpu_to_le16(1);
620 vneg_inbuf
.Dialects
[0] =
621 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
623 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
624 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
626 (char *)&vneg_inbuf
, sizeof(struct validate_negotiate_info_req
),
627 (char **)&pneg_rsp
, &rsplen
);
630 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
634 if (rsplen
!= sizeof(struct validate_negotiate_info_rsp
)) {
635 cifs_dbg(VFS
, "invalid size of protocol negotiate response\n");
639 /* check validate negotiate info response matches what we got earlier */
640 if (pneg_rsp
->Dialect
!=
641 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
))
644 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
647 /* do not validate server guid because not saved at negprot time yet */
649 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
650 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
653 /* validate negotiate successful */
654 cifs_dbg(FYI
, "validate negotiate info successful\n");
658 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
663 smb2_select_sectype(struct TCP_Server_Info
*server
, enum securityEnum requested
)
672 if (server
->sec_ntlmssp
&&
673 (global_secflags
& CIFSSEC_MAY_NTLMSSP
))
675 if ((server
->sec_kerberos
|| server
->sec_mskerberos
) &&
676 (global_secflags
& CIFSSEC_MAY_KRB5
))
684 struct SMB2_sess_data
{
686 struct cifs_ses
*ses
;
687 struct nls_table
*nls_cp
;
688 void (*func
)(struct SMB2_sess_data
*);
690 u64 previous_session
;
692 /* we will send the SMB in three pieces:
693 * a fixed length beginning part, an optional
694 * SPNEGO blob (which can be zero length), and a
695 * last part which will include the strings
696 * and rest of bcc area. This allows us to avoid
697 * a large buffer 17K allocation
704 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
707 struct cifs_ses
*ses
= sess_data
->ses
;
708 struct smb2_sess_setup_req
*req
;
709 struct TCP_Server_Info
*server
= ses
->server
;
711 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
715 /* First session, not a reauthenticate */
716 req
->hdr
.sync_hdr
.SessionId
= 0;
718 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
719 req
->PreviousSessionId
= sess_data
->previous_session
;
721 req
->Flags
= 0; /* MBZ */
722 /* to enable echos and oplocks */
723 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(3);
725 /* only one of SMB2 signing flags may be set in SMB2 request */
727 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
728 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
729 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
731 req
->SecurityMode
= 0;
733 req
->Capabilities
= 0;
734 req
->Channel
= 0; /* MBZ */
736 sess_data
->iov
[0].iov_base
= (char *)req
;
737 /* 4 for rfc1002 length field and 1 for pad */
738 sess_data
->iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
740 * This variable will be used to clear the buffer
741 * allocated above in case of any error in the calling function.
743 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
749 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
751 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
752 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
756 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
759 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
760 struct kvec rsp_iov
= { NULL
, 0 };
762 /* Testing shows that buffer offset must be at location of Buffer[0] */
763 req
->SecurityBufferOffset
=
764 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
765 1 /* pad */ - 4 /* rfc1001 len */);
766 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
768 inc_rfc1001_len(req
, sess_data
->iov
[1].iov_len
- 1 /* pad */);
770 /* BB add code to build os and lm fields */
772 rc
= SendReceive2(sess_data
->xid
, sess_data
->ses
,
774 &sess_data
->buf0_type
,
775 CIFS_LOG_ERROR
| CIFS_NEG_OP
, &rsp_iov
);
776 cifs_small_buf_release(sess_data
->iov
[0].iov_base
);
777 memcpy(&sess_data
->iov
[0], &rsp_iov
, sizeof(struct kvec
));
783 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
786 struct cifs_ses
*ses
= sess_data
->ses
;
788 mutex_lock(&ses
->server
->srv_mutex
);
789 if (ses
->server
->ops
->generate_signingkey
) {
790 rc
= ses
->server
->ops
->generate_signingkey(ses
);
793 "SMB3 session key generation failed\n");
794 mutex_unlock(&ses
->server
->srv_mutex
);
798 if (!ses
->server
->session_estab
) {
799 ses
->server
->sequence_number
= 0x2;
800 ses
->server
->session_estab
= true;
802 mutex_unlock(&ses
->server
->srv_mutex
);
804 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
805 spin_lock(&GlobalMid_Lock
);
806 ses
->status
= CifsGood
;
807 ses
->need_reconnect
= false;
808 spin_unlock(&GlobalMid_Lock
);
812 #ifdef CONFIG_CIFS_UPCALL
814 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
817 struct cifs_ses
*ses
= sess_data
->ses
;
818 struct cifs_spnego_msg
*msg
;
819 struct key
*spnego_key
= NULL
;
820 struct smb2_sess_setup_rsp
*rsp
= NULL
;
822 rc
= SMB2_sess_alloc_buffer(sess_data
);
826 spnego_key
= cifs_get_spnego_key(ses
);
827 if (IS_ERR(spnego_key
)) {
828 rc
= PTR_ERR(spnego_key
);
833 msg
= spnego_key
->payload
.data
[0];
835 * check version field to make sure that cifs.upcall is
836 * sending us a response in an expected form
838 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
840 "bad cifs.upcall version. Expected %d got %d",
841 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
843 goto out_put_spnego_key
;
846 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
848 if (!ses
->auth_key
.response
) {
850 "Kerberos can't allocate (%u bytes) memory",
853 goto out_put_spnego_key
;
855 ses
->auth_key
.len
= msg
->sesskey_len
;
857 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
858 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
860 rc
= SMB2_sess_sendreceive(sess_data
);
862 goto out_put_spnego_key
;
864 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
865 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
867 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
869 rc
= SMB2_sess_establish_session(sess_data
);
871 key_invalidate(spnego_key
);
874 sess_data
->result
= rc
;
875 sess_data
->func
= NULL
;
876 SMB2_sess_free_buffer(sess_data
);
880 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
882 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
883 sess_data
->result
= -EOPNOTSUPP
;
884 sess_data
->func
= NULL
;
889 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
892 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
895 struct cifs_ses
*ses
= sess_data
->ses
;
896 struct smb2_sess_setup_rsp
*rsp
= NULL
;
897 char *ntlmssp_blob
= NULL
;
898 bool use_spnego
= false; /* else use raw ntlmssp */
902 * If memory allocation is successful, caller of this function
905 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
910 ses
->ntlmssp
->sesskey_per_smbsess
= true;
912 rc
= SMB2_sess_alloc_buffer(sess_data
);
916 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
918 if (ntlmssp_blob
== NULL
) {
923 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
925 /* BB eventually need to add this */
926 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
930 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
931 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
933 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
934 sess_data
->iov
[1].iov_len
= blob_length
;
936 rc
= SMB2_sess_sendreceive(sess_data
);
937 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
939 /* If true, rc here is expected and not an error */
940 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
941 rsp
->hdr
.sync_hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
947 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
948 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
949 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
950 le16_to_cpu(rsp
->SecurityBufferOffset
));
954 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
955 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
959 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
962 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
963 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
967 SMB2_sess_free_buffer(sess_data
);
969 sess_data
->result
= 0;
970 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
976 sess_data
->result
= rc
;
977 sess_data
->func
= NULL
;
981 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
984 struct cifs_ses
*ses
= sess_data
->ses
;
985 struct smb2_sess_setup_req
*req
;
986 struct smb2_sess_setup_rsp
*rsp
= NULL
;
987 unsigned char *ntlmssp_blob
= NULL
;
988 bool use_spnego
= false; /* else use raw ntlmssp */
991 rc
= SMB2_sess_alloc_buffer(sess_data
);
995 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
996 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
998 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
, ses
,
1001 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
1006 /* BB eventually need to add this */
1007 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1011 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1012 sess_data
->iov
[1].iov_len
= blob_length
;
1014 rc
= SMB2_sess_sendreceive(sess_data
);
1018 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1020 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
1021 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1023 rc
= SMB2_sess_establish_session(sess_data
);
1025 kfree(ntlmssp_blob
);
1026 SMB2_sess_free_buffer(sess_data
);
1027 kfree(ses
->ntlmssp
);
1028 ses
->ntlmssp
= NULL
;
1029 sess_data
->result
= rc
;
1030 sess_data
->func
= NULL
;
1034 SMB2_select_sec(struct cifs_ses
*ses
, struct SMB2_sess_data
*sess_data
)
1038 type
= smb2_select_sectype(ses
->server
, ses
->sectype
);
1039 cifs_dbg(FYI
, "sess setup type %d\n", type
);
1040 if (type
== Unspecified
) {
1042 "Unable to select appropriate authentication method!");
1048 sess_data
->func
= SMB2_auth_kerberos
;
1051 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
1054 cifs_dbg(VFS
, "secType %d not supported!\n", type
);
1062 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
1063 const struct nls_table
*nls_cp
)
1066 struct TCP_Server_Info
*server
= ses
->server
;
1067 struct SMB2_sess_data
*sess_data
;
1069 cifs_dbg(FYI
, "Session Setup\n");
1072 WARN(1, "%s: server is NULL!\n", __func__
);
1076 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
1080 rc
= SMB2_select_sec(ses
, sess_data
);
1083 sess_data
->xid
= xid
;
1084 sess_data
->ses
= ses
;
1085 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1086 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1088 while (sess_data
->func
)
1089 sess_data
->func(sess_data
);
1091 rc
= sess_data
->result
;
1098 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1100 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1102 struct TCP_Server_Info
*server
;
1105 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1107 if (ses
&& (ses
->server
))
1108 server
= ses
->server
;
1112 /* no need to send SMB logoff if uid already closed due to reconnect */
1113 if (ses
->need_reconnect
)
1114 goto smb2_session_already_dead
;
1116 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
1120 /* since no tcon, smb2_init can not do this, so do here */
1121 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1123 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
1124 flags
|= CIFS_TRANSFORM_REQ
;
1125 else if (server
->sign
)
1126 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1128 rc
= SendReceiveNoRsp(xid
, ses
, (char *) req
, flags
);
1129 cifs_small_buf_release(req
);
1131 * No tcon so can't do
1132 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1135 smb2_session_already_dead
:
1139 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1141 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1144 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1146 /* These are similar values to what Windows uses */
1147 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1149 tcon
->max_chunks
= 256;
1150 tcon
->max_bytes_chunk
= 1048576;
1151 tcon
->max_bytes_copy
= 16777216;
1155 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1156 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1158 struct smb2_tree_connect_req
*req
;
1159 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1161 struct kvec rsp_iov
;
1165 struct TCP_Server_Info
*server
;
1166 __le16
*unc_path
= NULL
;
1169 cifs_dbg(FYI
, "TCON\n");
1171 if ((ses
->server
) && tree
)
1172 server
= ses
->server
;
1176 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1177 if (unc_path
== NULL
)
1180 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1182 if (unc_path_len
< 2) {
1187 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1191 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
1198 if ((ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
))
1199 flags
|= CIFS_TRANSFORM_REQ
;
1201 /* since no tcon, smb2_init can not do this, so do here */
1202 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1203 if (ses
->server
->sign
)
1204 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1205 } else if (encryption_required(tcon
))
1206 flags
|= CIFS_TRANSFORM_REQ
;
1208 iov
[0].iov_base
= (char *)req
;
1209 /* 4 for rfc1002 length field and 1 for pad */
1210 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1212 /* Testing shows that buffer offset must be at location of Buffer[0] */
1213 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1214 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1215 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1216 iov
[1].iov_base
= unc_path
;
1217 iov
[1].iov_len
= unc_path_len
;
1219 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
1221 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, flags
, &rsp_iov
);
1222 cifs_small_buf_release(req
);
1223 rsp
= (struct smb2_tree_connect_rsp
*)rsp_iov
.iov_base
;
1227 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1228 tcon
->need_reconnect
= true;
1230 goto tcon_error_exit
;
1234 ses
->ipc_tid
= rsp
->hdr
.sync_hdr
.TreeId
;
1238 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
1239 cifs_dbg(FYI
, "connection to disk share\n");
1240 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
1242 cifs_dbg(FYI
, "connection to pipe share\n");
1243 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
1245 cifs_dbg(FYI
, "connection to printer\n");
1247 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1249 goto tcon_error_exit
;
1252 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1253 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1254 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1255 tcon
->tidStatus
= CifsGood
;
1256 tcon
->need_reconnect
= false;
1257 tcon
->tid
= rsp
->hdr
.sync_hdr
.TreeId
;
1258 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1260 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1261 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1262 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1265 !(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
1266 cifs_dbg(VFS
, "Encryption is requested but not supported\n");
1268 init_copy_chunk_defaults(tcon
);
1269 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1270 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1272 free_rsp_buf(resp_buftype
, rsp
);
1277 if (rsp
->hdr
.sync_hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1278 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1284 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1286 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1288 struct TCP_Server_Info
*server
;
1289 struct cifs_ses
*ses
= tcon
->ses
;
1292 cifs_dbg(FYI
, "Tree Disconnect\n");
1294 if (ses
&& (ses
->server
))
1295 server
= ses
->server
;
1299 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1302 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
1306 if (encryption_required(tcon
))
1307 flags
|= CIFS_TRANSFORM_REQ
;
1309 rc
= SendReceiveNoRsp(xid
, ses
, (char *)req
, flags
);
1310 cifs_small_buf_release(req
);
1312 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1318 static struct create_durable
*
1319 create_durable_buf(void)
1321 struct create_durable
*buf
;
1323 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1327 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1328 (struct create_durable
, Data
));
1329 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1330 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1331 (struct create_durable
, Name
));
1332 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1333 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1341 static struct create_durable
*
1342 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1344 struct create_durable
*buf
;
1346 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1350 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1351 (struct create_durable
, Data
));
1352 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1353 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1354 (struct create_durable
, Name
));
1355 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1356 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1357 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1358 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1367 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1368 unsigned int *epoch
)
1371 struct create_context
*cc
;
1373 unsigned int remaining
;
1376 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
1377 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
1378 cc
= (struct create_context
*)data_offset
;
1379 while (remaining
>= sizeof(struct create_context
)) {
1380 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1381 if (le16_to_cpu(cc
->NameLength
) == 4 &&
1382 strncmp(name
, "RqLs", 4) == 0)
1383 return server
->ops
->parse_lease_buf(cc
, epoch
);
1385 next
= le32_to_cpu(cc
->Next
);
1389 cc
= (struct create_context
*)((char *)cc
+ next
);
1396 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1397 unsigned int *num_iovec
, __u8
*oplock
)
1399 struct smb2_create_req
*req
= iov
[0].iov_base
;
1400 unsigned int num
= *num_iovec
;
1402 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1403 if (iov
[num
].iov_base
== NULL
)
1405 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1406 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1407 if (!req
->CreateContextsOffset
)
1408 req
->CreateContextsOffset
= cpu_to_le32(
1409 sizeof(struct smb2_create_req
) - 4 +
1410 iov
[num
- 1].iov_len
);
1411 le32_add_cpu(&req
->CreateContextsLength
,
1412 server
->vals
->create_lease_size
);
1413 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
1414 *num_iovec
= num
+ 1;
1418 static struct create_durable_v2
*
1419 create_durable_v2_buf(struct cifs_fid
*pfid
)
1421 struct create_durable_v2
*buf
;
1423 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1427 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1428 (struct create_durable_v2
, dcontext
));
1429 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1430 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1431 (struct create_durable_v2
, Name
));
1432 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1434 buf
->dcontext
.Timeout
= 0; /* Should this be configurable by workload */
1435 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1436 generate_random_uuid(buf
->dcontext
.CreateGuid
);
1437 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1439 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1447 static struct create_durable_handle_reconnect_v2
*
1448 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1450 struct create_durable_handle_reconnect_v2
*buf
;
1452 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1457 buf
->ccontext
.DataOffset
=
1458 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1460 buf
->ccontext
.DataLength
=
1461 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1462 buf
->ccontext
.NameOffset
=
1463 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1465 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1467 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1468 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1469 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1470 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1472 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1481 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1482 struct cifs_open_parms
*oparms
)
1484 struct smb2_create_req
*req
= iov
[0].iov_base
;
1485 unsigned int num
= *num_iovec
;
1487 iov
[num
].iov_base
= create_durable_v2_buf(oparms
->fid
);
1488 if (iov
[num
].iov_base
== NULL
)
1490 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1491 if (!req
->CreateContextsOffset
)
1492 req
->CreateContextsOffset
=
1493 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1495 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1496 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable_v2
));
1497 *num_iovec
= num
+ 1;
1502 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1503 struct cifs_open_parms
*oparms
)
1505 struct smb2_create_req
*req
= iov
[0].iov_base
;
1506 unsigned int num
= *num_iovec
;
1508 /* indicate that we don't need to relock the file */
1509 oparms
->reconnect
= false;
1511 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1512 if (iov
[num
].iov_base
== NULL
)
1514 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1515 if (!req
->CreateContextsOffset
)
1516 req
->CreateContextsOffset
=
1517 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1519 le32_add_cpu(&req
->CreateContextsLength
,
1520 sizeof(struct create_durable_handle_reconnect_v2
));
1521 inc_rfc1001_len(&req
->hdr
,
1522 sizeof(struct create_durable_handle_reconnect_v2
));
1523 *num_iovec
= num
+ 1;
1528 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1529 struct cifs_open_parms
*oparms
, bool use_persistent
)
1531 struct smb2_create_req
*req
= iov
[0].iov_base
;
1532 unsigned int num
= *num_iovec
;
1534 if (use_persistent
) {
1535 if (oparms
->reconnect
)
1536 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1539 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1542 if (oparms
->reconnect
) {
1543 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1544 /* indicate that we don't need to relock the file */
1545 oparms
->reconnect
= false;
1547 iov
[num
].iov_base
= create_durable_buf();
1548 if (iov
[num
].iov_base
== NULL
)
1550 iov
[num
].iov_len
= sizeof(struct create_durable
);
1551 if (!req
->CreateContextsOffset
)
1552 req
->CreateContextsOffset
=
1553 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1555 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1556 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
1557 *num_iovec
= num
+ 1;
1562 alloc_path_with_tree_prefix(__le16
**out_path
, int *out_size
, int *out_len
,
1563 const char *treename
, const __le16
*path
)
1565 int treename_len
, path_len
;
1566 struct nls_table
*cp
;
1567 const __le16 sep
[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1572 treename_len
= strlen(treename
);
1573 if (treename_len
< 2 || !(treename
[0] == '\\' && treename
[1] == '\\'))
1579 path_len
= UniStrnlen((wchar_t *)path
, PATH_MAX
);
1582 * make room for one path separator between the treename and
1585 *out_len
= treename_len
+ 1 + path_len
;
1588 * final path needs to be null-terminated UTF16 with a
1592 *out_size
= roundup((*out_len
+1)*2, 8);
1593 *out_path
= kzalloc(*out_size
, GFP_KERNEL
);
1597 cp
= load_nls_default();
1598 cifs_strtoUTF16(*out_path
, treename
, treename_len
, cp
);
1599 UniStrcat(*out_path
, sep
);
1600 UniStrcat(*out_path
, path
);
1607 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1608 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1609 struct smb2_err_rsp
**err_buf
)
1611 struct smb2_create_req
*req
;
1612 struct smb2_create_rsp
*rsp
;
1613 struct TCP_Server_Info
*server
;
1614 struct cifs_tcon
*tcon
= oparms
->tcon
;
1615 struct cifs_ses
*ses
= tcon
->ses
;
1617 struct kvec rsp_iov
;
1620 __le16
*copy_path
= NULL
;
1623 unsigned int n_iov
= 2;
1624 __u32 file_attributes
= 0;
1625 char *dhc_buf
= NULL
, *lc_buf
= NULL
;
1628 cifs_dbg(FYI
, "create/open\n");
1630 if (ses
&& (ses
->server
))
1631 server
= ses
->server
;
1635 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1639 if (encryption_required(tcon
))
1640 flags
|= CIFS_TRANSFORM_REQ
;
1642 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1643 file_attributes
|= ATTR_READONLY
;
1644 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
1645 file_attributes
|= ATTR_SYSTEM
;
1647 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1648 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1649 /* File attributes ignored on open (used in create though) */
1650 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1651 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1652 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1653 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1655 iov
[0].iov_base
= (char *)req
;
1656 /* 4 for rfc1002 length field */
1657 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1658 /* -1 since last byte is buf[0] which is sent below (path) */
1661 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
1663 /* [MS-SMB2] 2.2.13 NameOffset:
1664 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1665 * the SMB2 header, the file name includes a prefix that will
1666 * be processed during DFS name normalization as specified in
1667 * section 3.3.5.9. Otherwise, the file name is relative to
1668 * the share that is identified by the TreeId in the SMB2
1671 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
1674 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
1675 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
1677 tcon
->treeName
, path
);
1680 req
->NameLength
= cpu_to_le16(name_len
* 2);
1681 uni_path_len
= copy_size
;
1684 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1685 /* MUST set path len (NameLength) to 0 opening root of share */
1686 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1687 if (uni_path_len
% 8 != 0) {
1688 copy_size
= roundup(uni_path_len
, 8);
1689 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1692 memcpy((char *)copy_path
, (const char *)path
,
1694 uni_path_len
= copy_size
;
1699 iov
[1].iov_len
= uni_path_len
;
1700 iov
[1].iov_base
= path
;
1701 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1702 inc_rfc1001_len(req
, uni_path_len
- 1);
1704 if (!server
->oplocks
)
1705 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1707 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1708 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1709 req
->RequestedOplockLevel
= *oplock
;
1711 rc
= add_lease_context(server
, iov
, &n_iov
, oplock
);
1713 cifs_small_buf_release(req
);
1717 lc_buf
= iov
[n_iov
-1].iov_base
;
1720 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1721 /* need to set Next field of lease context if we request it */
1722 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
1723 struct create_context
*ccontext
=
1724 (struct create_context
*)iov
[n_iov
-1].iov_base
;
1726 cpu_to_le32(server
->vals
->create_lease_size
);
1729 rc
= add_durable_context(iov
, &n_iov
, oparms
,
1730 tcon
->use_persistent
);
1732 cifs_small_buf_release(req
);
1737 dhc_buf
= iov
[n_iov
-1].iov_base
;
1740 rc
= SendReceive2(xid
, ses
, iov
, n_iov
, &resp_buftype
, flags
, &rsp_iov
);
1741 cifs_small_buf_release(req
);
1742 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
1745 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1747 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1752 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1753 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1756 memcpy(buf
, &rsp
->CreationTime
, 32);
1757 buf
->AllocationSize
= rsp
->AllocationSize
;
1758 buf
->EndOfFile
= rsp
->EndofFile
;
1759 buf
->Attributes
= rsp
->FileAttributes
;
1760 buf
->NumberOfLinks
= cpu_to_le32(1);
1761 buf
->DeletePending
= 0;
1764 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1765 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1767 *oplock
= rsp
->OplockLevel
;
1772 free_rsp_buf(resp_buftype
, rsp
);
1777 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1780 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1781 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, bool use_ipc
,
1782 char *in_data
, u32 indatalen
,
1783 char **out_data
, u32
*plen
/* returned data len */)
1785 struct smb2_ioctl_req
*req
;
1786 struct smb2_ioctl_rsp
*rsp
;
1787 struct smb2_sync_hdr
*shdr
;
1788 struct TCP_Server_Info
*server
;
1789 struct cifs_ses
*ses
;
1791 struct kvec rsp_iov
;
1797 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1799 if (out_data
!= NULL
)
1802 /* zero out returned data len, in case of error */
1811 if (ses
&& (ses
->server
))
1812 server
= ses
->server
;
1816 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1821 if (ses
->ipc_tid
== 0) {
1822 cifs_small_buf_release(req
);
1826 cifs_dbg(FYI
, "replacing tid 0x%x with IPC tid 0x%x\n",
1827 req
->hdr
.sync_hdr
.TreeId
, ses
->ipc_tid
);
1828 req
->hdr
.sync_hdr
.TreeId
= ses
->ipc_tid
;
1830 if (encryption_required(tcon
))
1831 flags
|= CIFS_TRANSFORM_REQ
;
1833 req
->CtlCode
= cpu_to_le32(opcode
);
1834 req
->PersistentFileId
= persistent_fid
;
1835 req
->VolatileFileId
= volatile_fid
;
1838 req
->InputCount
= cpu_to_le32(indatalen
);
1839 /* do not set InputOffset if no input data */
1841 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1842 iov
[1].iov_base
= in_data
;
1843 iov
[1].iov_len
= indatalen
;
1848 req
->OutputOffset
= 0;
1849 req
->OutputCount
= 0; /* MBZ */
1852 * Could increase MaxOutputResponse, but that would require more
1853 * than one credit. Windows typically sets this smaller, but for some
1854 * ioctls it may be useful to allow server to send more. No point
1855 * limiting what the server can send as long as fits in one credit
1857 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1860 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1864 iov
[0].iov_base
= (char *)req
;
1867 * If no input data, the size of ioctl struct in
1868 * protocol spec still includes a 1 byte data buffer,
1869 * but if input data passed to ioctl, we do not
1870 * want to double count this, so we do not send
1871 * the dummy one byte of data in iovec[0] if sending
1872 * input data (in iovec[1]). We also must add 4 bytes
1873 * in first iovec to allow for rfc1002 length field.
1877 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1878 inc_rfc1001_len(req
, indatalen
- 1);
1880 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1883 rc
= SendReceive2(xid
, ses
, iov
, n_iov
, &resp_buftype
, flags
, &rsp_iov
);
1884 cifs_small_buf_release(req
);
1885 rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
.iov_base
;
1887 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
1888 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1890 } else if (rc
== -EINVAL
) {
1891 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
1892 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
1893 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1898 /* check if caller wants to look at return data or just return rc */
1899 if ((plen
== NULL
) || (out_data
== NULL
))
1902 *plen
= le32_to_cpu(rsp
->OutputCount
);
1904 /* We check for obvious errors in the output buffer length and offset */
1906 goto ioctl_exit
; /* server returned no data */
1907 else if (*plen
> 0xFF00) {
1908 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1914 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1915 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1916 le32_to_cpu(rsp
->OutputOffset
));
1922 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1923 if (*out_data
== NULL
) {
1928 shdr
= get_sync_hdr(rsp
);
1929 memcpy(*out_data
, (char *)shdr
+ le32_to_cpu(rsp
->OutputOffset
), *plen
);
1931 free_rsp_buf(resp_buftype
, rsp
);
1936 * Individual callers to ioctl worker function follow
1940 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
1941 u64 persistent_fid
, u64 volatile_fid
)
1944 struct compress_ioctl fsctl_input
;
1945 char *ret_data
= NULL
;
1947 fsctl_input
.CompressionState
=
1948 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
1950 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
1951 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
1952 false /* use_ipc */,
1953 (char *)&fsctl_input
/* data input */,
1954 2 /* in data len */, &ret_data
/* out data */, NULL
);
1956 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
1962 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1963 u64 persistent_fid
, u64 volatile_fid
)
1965 struct smb2_close_req
*req
;
1966 struct smb2_close_rsp
*rsp
;
1967 struct TCP_Server_Info
*server
;
1968 struct cifs_ses
*ses
= tcon
->ses
;
1970 struct kvec rsp_iov
;
1975 cifs_dbg(FYI
, "Close\n");
1977 if (ses
&& (ses
->server
))
1978 server
= ses
->server
;
1982 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1986 if (encryption_required(tcon
))
1987 flags
|= CIFS_TRANSFORM_REQ
;
1989 req
->PersistentFileId
= persistent_fid
;
1990 req
->VolatileFileId
= volatile_fid
;
1992 iov
[0].iov_base
= (char *)req
;
1993 /* 4 for rfc1002 length field */
1994 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1996 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
1997 cifs_small_buf_release(req
);
1998 rsp
= (struct smb2_close_rsp
*)rsp_iov
.iov_base
;
2001 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
2005 /* BB FIXME - decode close response, update inode for caching */
2008 free_rsp_buf(resp_buftype
, rsp
);
2013 validate_buf(unsigned int offset
, unsigned int buffer_length
,
2014 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
2017 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
2018 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
2019 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
2020 char *end_of_buf
= begin_of_buf
+ buffer_length
;
2023 if (buffer_length
< min_buf_size
) {
2024 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
2025 buffer_length
, min_buf_size
);
2029 /* check if beyond RFC1001 maximum length */
2030 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
2031 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
2032 buffer_length
, smb_len
);
2036 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
2037 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
2045 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2046 * Caller must free buffer.
2049 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
2050 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
2054 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
2060 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
2064 memcpy(data
, begin_of_buf
, buffer_length
);
2070 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2071 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
2072 size_t output_len
, size_t min_len
, void *data
)
2074 struct smb2_query_info_req
*req
;
2075 struct smb2_query_info_rsp
*rsp
= NULL
;
2077 struct kvec rsp_iov
;
2080 struct TCP_Server_Info
*server
;
2081 struct cifs_ses
*ses
= tcon
->ses
;
2084 cifs_dbg(FYI
, "Query Info\n");
2086 if (ses
&& (ses
->server
))
2087 server
= ses
->server
;
2091 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2095 if (encryption_required(tcon
))
2096 flags
|= CIFS_TRANSFORM_REQ
;
2098 req
->InfoType
= SMB2_O_INFO_FILE
;
2099 req
->FileInfoClass
= info_class
;
2100 req
->PersistentFileId
= persistent_fid
;
2101 req
->VolatileFileId
= volatile_fid
;
2102 /* 4 for rfc1002 length field and 1 for Buffer */
2103 req
->InputBufferOffset
=
2104 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2105 req
->OutputBufferLength
= cpu_to_le32(output_len
);
2107 iov
[0].iov_base
= (char *)req
;
2108 /* 4 for rfc1002 length field */
2109 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2111 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2112 cifs_small_buf_release(req
);
2113 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
2116 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2120 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2121 le32_to_cpu(rsp
->OutputBufferLength
),
2122 &rsp
->hdr
, min_len
, data
);
2125 free_rsp_buf(resp_buftype
, rsp
);
2130 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2131 u64 persistent_fid
, u64 volatile_fid
,
2132 struct smb2_file_all_info
*data
)
2134 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2135 FILE_ALL_INFORMATION
,
2136 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
2137 sizeof(struct smb2_file_all_info
), data
);
2141 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
2142 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
2144 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2145 FILE_INTERNAL_INFORMATION
,
2146 sizeof(struct smb2_file_internal_info
),
2147 sizeof(struct smb2_file_internal_info
), uniqueid
);
2151 * This is a no-op for now. We're not really interested in the reply, but
2152 * rather in the fact that the server sent one and that server->lstrp
2155 * FIXME: maybe we should consider checking that the reply matches request?
2158 smb2_echo_callback(struct mid_q_entry
*mid
)
2160 struct TCP_Server_Info
*server
= mid
->callback_data
;
2161 struct smb2_echo_rsp
*rsp
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
2162 unsigned int credits_received
= 1;
2164 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
2165 credits_received
= le16_to_cpu(rsp
->hdr
.sync_hdr
.CreditRequest
);
2167 mutex_lock(&server
->srv_mutex
);
2168 DeleteMidQEntry(mid
);
2169 mutex_unlock(&server
->srv_mutex
);
2170 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
2173 void smb2_reconnect_server(struct work_struct
*work
)
2175 struct TCP_Server_Info
*server
= container_of(work
,
2176 struct TCP_Server_Info
, reconnect
.work
);
2177 struct cifs_ses
*ses
;
2178 struct cifs_tcon
*tcon
, *tcon2
;
2179 struct list_head tmp_list
;
2180 int tcon_exist
= false;
2182 int resched
= false;
2185 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2186 mutex_lock(&server
->reconnect_mutex
);
2188 INIT_LIST_HEAD(&tmp_list
);
2189 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
2191 spin_lock(&cifs_tcp_ses_lock
);
2192 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
2193 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
2194 if (tcon
->need_reconnect
|| tcon
->need_reopen_files
) {
2196 list_add_tail(&tcon
->rlist
, &tmp_list
);
2202 * Get the reference to server struct to be sure that the last call of
2203 * cifs_put_tcon() in the loop below won't release the server pointer.
2206 server
->srv_count
++;
2208 spin_unlock(&cifs_tcp_ses_lock
);
2210 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
2211 rc
= smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
);
2213 cifs_reopen_persistent_handles(tcon
);
2216 list_del_init(&tcon
->rlist
);
2217 cifs_put_tcon(tcon
);
2220 cifs_dbg(FYI
, "Reconnecting tcons finished\n");
2222 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 2 * HZ
);
2223 mutex_unlock(&server
->reconnect_mutex
);
2225 /* now we can safely release srv struct */
2227 cifs_put_tcp_session(server
, 1);
2231 SMB2_echo(struct TCP_Server_Info
*server
)
2233 struct smb2_echo_req
*req
;
2236 struct smb_rqst rqst
= { .rq_iov
= iov
,
2239 cifs_dbg(FYI
, "In echo request\n");
2241 if (server
->tcpStatus
== CifsNeedNegotiate
) {
2242 /* No need to send echo on newly established connections */
2243 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
2247 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
2251 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
2253 /* 4 for rfc1002 length field */
2255 iov
[0].iov_base
= (char *)req
;
2256 iov
[1].iov_len
= get_rfc1002_length(req
);
2257 iov
[1].iov_base
= (char *)req
+ 4;
2259 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, NULL
,
2260 server
, CIFS_ECHO_OP
);
2262 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
2264 cifs_small_buf_release(req
);
2269 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2272 struct smb2_flush_req
*req
;
2273 struct TCP_Server_Info
*server
;
2274 struct cifs_ses
*ses
= tcon
->ses
;
2276 struct kvec rsp_iov
;
2281 cifs_dbg(FYI
, "Flush\n");
2283 if (ses
&& (ses
->server
))
2284 server
= ses
->server
;
2288 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
2292 if (encryption_required(tcon
))
2293 flags
|= CIFS_TRANSFORM_REQ
;
2295 req
->PersistentFileId
= persistent_fid
;
2296 req
->VolatileFileId
= volatile_fid
;
2298 iov
[0].iov_base
= (char *)req
;
2299 /* 4 for rfc1002 length field */
2300 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2302 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2303 cifs_small_buf_release(req
);
2306 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
2308 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2313 * To form a chain of read requests, any read requests after the first should
2314 * have the end_of_chain boolean set to true.
2317 smb2_new_read_req(void **buf
, unsigned int *total_len
,
2318 struct cifs_io_parms
*io_parms
, unsigned int remaining_bytes
,
2322 struct smb2_read_plain_req
*req
= NULL
;
2323 struct smb2_sync_hdr
*shdr
;
2325 rc
= smb2_plain_req_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
,
2329 if (io_parms
->tcon
->ses
->server
== NULL
)
2330 return -ECONNABORTED
;
2332 shdr
= &req
->sync_hdr
;
2333 shdr
->ProcessId
= cpu_to_le32(io_parms
->pid
);
2335 req
->PersistentFileId
= io_parms
->persistent_fid
;
2336 req
->VolatileFileId
= io_parms
->volatile_fid
;
2337 req
->ReadChannelInfoOffset
= 0; /* reserved */
2338 req
->ReadChannelInfoLength
= 0; /* reserved */
2339 req
->Channel
= 0; /* reserved */
2340 req
->MinimumCount
= 0;
2341 req
->Length
= cpu_to_le32(io_parms
->length
);
2342 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2344 if (request_type
& CHAINED_REQUEST
) {
2345 if (!(request_type
& END_OF_CHAIN
)) {
2346 /* next 8-byte aligned request */
2347 *total_len
= DIV_ROUND_UP(*total_len
, 8) * 8;
2348 shdr
->NextCommand
= cpu_to_le32(*total_len
);
2349 } else /* END_OF_CHAIN */
2350 shdr
->NextCommand
= 0;
2351 if (request_type
& RELATED_REQUEST
) {
2352 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
2354 * Related requests use info from previous read request
2357 shdr
->SessionId
= 0xFFFFFFFF;
2358 shdr
->TreeId
= 0xFFFFFFFF;
2359 req
->PersistentFileId
= 0xFFFFFFFF;
2360 req
->VolatileFileId
= 0xFFFFFFFF;
2363 if (remaining_bytes
> io_parms
->length
)
2364 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
2366 req
->RemainingBytes
= 0;
2373 smb2_readv_callback(struct mid_q_entry
*mid
)
2375 struct cifs_readdata
*rdata
= mid
->callback_data
;
2376 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2377 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2378 struct smb2_sync_hdr
*shdr
=
2379 (struct smb2_sync_hdr
*)rdata
->iov
[1].iov_base
;
2380 unsigned int credits_received
= 1;
2381 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2383 .rq_pages
= rdata
->pages
,
2384 .rq_npages
= rdata
->nr_pages
,
2385 .rq_pagesz
= rdata
->pagesz
,
2386 .rq_tailsz
= rdata
->tailsz
};
2388 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2389 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
2392 switch (mid
->mid_state
) {
2393 case MID_RESPONSE_RECEIVED
:
2394 credits_received
= le16_to_cpu(shdr
->CreditRequest
);
2395 /* result already set, check signature */
2396 if (server
->sign
&& !mid
->decrypted
) {
2399 rc
= smb2_verify_signature(&rqst
, server
);
2401 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
2404 /* FIXME: should this be counted toward the initiating task? */
2405 task_io_account_read(rdata
->got_bytes
);
2406 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2408 case MID_REQUEST_SUBMITTED
:
2409 case MID_RETRY_NEEDED
:
2410 rdata
->result
= -EAGAIN
;
2411 if (server
->sign
&& rdata
->got_bytes
)
2412 /* reset bytes number since we can not check a sign */
2413 rdata
->got_bytes
= 0;
2414 /* FIXME: should this be counted toward the initiating task? */
2415 task_io_account_read(rdata
->got_bytes
);
2416 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2419 if (rdata
->result
!= -ENODATA
)
2420 rdata
->result
= -EIO
;
2424 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
2426 queue_work(cifsiod_wq
, &rdata
->work
);
2427 mutex_lock(&server
->srv_mutex
);
2428 DeleteMidQEntry(mid
);
2429 mutex_unlock(&server
->srv_mutex
);
2430 add_credits(server
, credits_received
, 0);
2433 /* smb2_async_readv - send an async read, and set up mid to handle result */
2435 smb2_async_readv(struct cifs_readdata
*rdata
)
2439 struct smb2_sync_hdr
*shdr
;
2440 struct cifs_io_parms io_parms
;
2441 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2443 struct TCP_Server_Info
*server
;
2444 unsigned int total_len
;
2447 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
2448 __func__
, rdata
->offset
, rdata
->bytes
);
2450 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2451 io_parms
.offset
= rdata
->offset
;
2452 io_parms
.length
= rdata
->bytes
;
2453 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
2454 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
2455 io_parms
.pid
= rdata
->pid
;
2457 server
= io_parms
.tcon
->ses
->server
;
2459 rc
= smb2_new_read_req((void **) &buf
, &total_len
, &io_parms
, 0, 0);
2461 if (rc
== -EAGAIN
&& rdata
->credits
) {
2462 /* credits was reset by reconnect */
2464 /* reduce in_flight value since we won't send the req */
2465 spin_lock(&server
->req_lock
);
2466 server
->in_flight
--;
2467 spin_unlock(&server
->req_lock
);
2472 if (encryption_required(io_parms
.tcon
))
2473 flags
|= CIFS_TRANSFORM_REQ
;
2475 req_len
= cpu_to_be32(total_len
);
2477 rdata
->iov
[0].iov_base
= &req_len
;
2478 rdata
->iov
[0].iov_len
= sizeof(__be32
);
2479 rdata
->iov
[1].iov_base
= buf
;
2480 rdata
->iov
[1].iov_len
= total_len
;
2482 shdr
= (struct smb2_sync_hdr
*)buf
;
2484 if (rdata
->credits
) {
2485 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
2486 SMB2_MAX_BUFFER_SIZE
));
2487 shdr
->CreditRequest
= shdr
->CreditCharge
;
2488 spin_lock(&server
->req_lock
);
2489 server
->credits
+= rdata
->credits
-
2490 le16_to_cpu(shdr
->CreditCharge
);
2491 spin_unlock(&server
->req_lock
);
2492 wake_up(&server
->request_q
);
2493 flags
|= CIFS_HAS_CREDITS
;
2496 kref_get(&rdata
->refcount
);
2497 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
2498 cifs_readv_receive
, smb2_readv_callback
,
2499 smb3_handle_read_data
, rdata
, flags
);
2501 kref_put(&rdata
->refcount
, cifs_readdata_release
);
2502 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
2505 cifs_small_buf_release(buf
);
2510 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2511 unsigned int *nbytes
, char **buf
, int *buf_type
)
2513 int resp_buftype
, rc
= -EACCES
;
2514 struct smb2_read_plain_req
*req
= NULL
;
2515 struct smb2_read_rsp
*rsp
= NULL
;
2516 struct smb2_sync_hdr
*shdr
;
2518 struct kvec rsp_iov
;
2519 unsigned int total_len
;
2521 struct smb_rqst rqst
= { .rq_iov
= iov
,
2523 int flags
= CIFS_LOG_ERROR
;
2524 struct cifs_ses
*ses
= io_parms
->tcon
->ses
;
2527 rc
= smb2_new_read_req((void **)&req
, &total_len
, io_parms
, 0, 0);
2531 if (encryption_required(io_parms
->tcon
))
2532 flags
|= CIFS_TRANSFORM_REQ
;
2534 req_len
= cpu_to_be32(total_len
);
2536 iov
[0].iov_base
= &req_len
;
2537 iov
[0].iov_len
= sizeof(__be32
);
2538 iov
[1].iov_base
= req
;
2539 iov
[1].iov_len
= total_len
;
2541 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2542 cifs_small_buf_release(req
);
2544 rsp
= (struct smb2_read_rsp
*)rsp_iov
.iov_base
;
2545 shdr
= get_sync_hdr(rsp
);
2547 if (shdr
->Status
== STATUS_END_OF_FILE
) {
2548 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2553 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
2554 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
2556 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2557 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
2558 (*nbytes
> io_parms
->length
)) {
2559 cifs_dbg(FYI
, "bad length %d for count %d\n",
2560 *nbytes
, io_parms
->length
);
2567 memcpy(*buf
, (char *)shdr
+ rsp
->DataOffset
, *nbytes
);
2568 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2569 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
2570 *buf
= rsp_iov
.iov_base
;
2571 if (resp_buftype
== CIFS_SMALL_BUFFER
)
2572 *buf_type
= CIFS_SMALL_BUFFER
;
2573 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
2574 *buf_type
= CIFS_LARGE_BUFFER
;
2580 * Check the mid_state and signature on received buffer (if any), and queue the
2581 * workqueue completion task.
2584 smb2_writev_callback(struct mid_q_entry
*mid
)
2586 struct cifs_writedata
*wdata
= mid
->callback_data
;
2587 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2588 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2589 unsigned int written
;
2590 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
2591 unsigned int credits_received
= 1;
2593 switch (mid
->mid_state
) {
2594 case MID_RESPONSE_RECEIVED
:
2595 credits_received
= le16_to_cpu(rsp
->hdr
.sync_hdr
.CreditRequest
);
2596 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
2597 if (wdata
->result
!= 0)
2600 written
= le32_to_cpu(rsp
->DataLength
);
2602 * Mask off high 16 bits when bytes written as returned
2603 * by the server is greater than bytes requested by the
2604 * client. OS/2 servers are known to set incorrect
2607 if (written
> wdata
->bytes
)
2610 if (written
< wdata
->bytes
)
2611 wdata
->result
= -ENOSPC
;
2613 wdata
->bytes
= written
;
2615 case MID_REQUEST_SUBMITTED
:
2616 case MID_RETRY_NEEDED
:
2617 wdata
->result
= -EAGAIN
;
2620 wdata
->result
= -EIO
;
2625 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2627 queue_work(cifsiod_wq
, &wdata
->work
);
2628 mutex_lock(&server
->srv_mutex
);
2629 DeleteMidQEntry(mid
);
2630 mutex_unlock(&server
->srv_mutex
);
2631 add_credits(tcon
->ses
->server
, credits_received
, 0);
2634 /* smb2_async_writev - send an async write, and set up mid to handle result */
2636 smb2_async_writev(struct cifs_writedata
*wdata
,
2637 void (*release
)(struct kref
*kref
))
2639 int rc
= -EACCES
, flags
= 0;
2640 struct smb2_write_req
*req
= NULL
;
2641 struct smb2_sync_hdr
*shdr
;
2642 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2643 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2645 struct smb_rqst rqst
= { };
2647 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
2649 if (rc
== -EAGAIN
&& wdata
->credits
) {
2650 /* credits was reset by reconnect */
2652 /* reduce in_flight value since we won't send the req */
2653 spin_lock(&server
->req_lock
);
2654 server
->in_flight
--;
2655 spin_unlock(&server
->req_lock
);
2657 goto async_writev_out
;
2660 if (encryption_required(tcon
))
2661 flags
|= CIFS_TRANSFORM_REQ
;
2663 shdr
= get_sync_hdr(req
);
2664 shdr
->ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
2666 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
2667 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
2668 req
->WriteChannelInfoOffset
= 0;
2669 req
->WriteChannelInfoLength
= 0;
2671 req
->Offset
= cpu_to_le64(wdata
->offset
);
2672 /* 4 for rfc1002 length field */
2673 req
->DataOffset
= cpu_to_le16(
2674 offsetof(struct smb2_write_req
, Buffer
) - 4);
2675 req
->RemainingBytes
= 0;
2677 /* 4 for rfc1002 length field and 1 for Buffer */
2679 iov
[0].iov_base
= req
;
2680 iov
[1].iov_len
= get_rfc1002_length(req
) - 1;
2681 iov
[1].iov_base
= (char *)req
+ 4;
2685 rqst
.rq_pages
= wdata
->pages
;
2686 rqst
.rq_npages
= wdata
->nr_pages
;
2687 rqst
.rq_pagesz
= wdata
->pagesz
;
2688 rqst
.rq_tailsz
= wdata
->tailsz
;
2690 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
2691 wdata
->offset
, wdata
->bytes
);
2693 req
->Length
= cpu_to_le32(wdata
->bytes
);
2695 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
2697 if (wdata
->credits
) {
2698 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
2699 SMB2_MAX_BUFFER_SIZE
));
2700 shdr
->CreditRequest
= shdr
->CreditCharge
;
2701 spin_lock(&server
->req_lock
);
2702 server
->credits
+= wdata
->credits
-
2703 le16_to_cpu(shdr
->CreditCharge
);
2704 spin_unlock(&server
->req_lock
);
2705 wake_up(&server
->request_q
);
2706 flags
|= CIFS_HAS_CREDITS
;
2709 kref_get(&wdata
->refcount
);
2710 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, NULL
,
2714 kref_put(&wdata
->refcount
, release
);
2715 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2719 cifs_small_buf_release(req
);
2724 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2725 * The length field from io_parms must be at least 1 and indicates a number of
2726 * elements with data to write that begins with position 1 in iov array. All
2727 * data length is specified by count.
2730 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2731 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
2734 struct smb2_write_req
*req
= NULL
;
2735 struct smb2_write_rsp
*rsp
= NULL
;
2737 struct kvec rsp_iov
;
2745 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
2749 if (io_parms
->tcon
->ses
->server
== NULL
)
2750 return -ECONNABORTED
;
2752 if (encryption_required(io_parms
->tcon
))
2753 flags
|= CIFS_TRANSFORM_REQ
;
2755 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
2757 req
->PersistentFileId
= io_parms
->persistent_fid
;
2758 req
->VolatileFileId
= io_parms
->volatile_fid
;
2759 req
->WriteChannelInfoOffset
= 0;
2760 req
->WriteChannelInfoLength
= 0;
2762 req
->Length
= cpu_to_le32(io_parms
->length
);
2763 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2764 /* 4 for rfc1002 length field */
2765 req
->DataOffset
= cpu_to_le16(
2766 offsetof(struct smb2_write_req
, Buffer
) - 4);
2767 req
->RemainingBytes
= 0;
2769 iov
[0].iov_base
= (char *)req
;
2770 /* 4 for rfc1002 length field and 1 for Buffer */
2771 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2773 /* length of entire message including data to be written */
2774 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
2776 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
2777 &resp_buftype
, flags
, &rsp_iov
);
2778 cifs_small_buf_release(req
);
2779 rsp
= (struct smb2_write_rsp
*)rsp_iov
.iov_base
;
2782 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
2783 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
2785 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2787 free_rsp_buf(resp_buftype
, rsp
);
2792 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
2795 unsigned int entrycount
= 0;
2796 unsigned int next_offset
= 0;
2797 FILE_DIRECTORY_INFO
*entryptr
;
2799 if (bufstart
== NULL
)
2802 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
2805 entryptr
= (FILE_DIRECTORY_INFO
*)
2806 ((char *)entryptr
+ next_offset
);
2808 if ((char *)entryptr
+ size
> end_of_buf
) {
2809 cifs_dbg(VFS
, "malformed search entry would overflow\n");
2813 len
= le32_to_cpu(entryptr
->FileNameLength
);
2814 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
2815 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
2820 *lastentry
= (char *)entryptr
;
2823 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
2835 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
2836 u64 persistent_fid
, u64 volatile_fid
, int index
,
2837 struct cifs_search_info
*srch_inf
)
2839 struct smb2_query_directory_req
*req
;
2840 struct smb2_query_directory_rsp
*rsp
= NULL
;
2842 struct kvec rsp_iov
;
2845 int resp_buftype
= CIFS_NO_BUFFER
;
2846 unsigned char *bufptr
;
2847 struct TCP_Server_Info
*server
;
2848 struct cifs_ses
*ses
= tcon
->ses
;
2849 __le16 asteriks
= cpu_to_le16('*');
2851 unsigned int output_size
= CIFSMaxBufSize
;
2852 size_t info_buf_size
;
2855 if (ses
&& (ses
->server
))
2856 server
= ses
->server
;
2860 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
2864 if (encryption_required(tcon
))
2865 flags
|= CIFS_TRANSFORM_REQ
;
2867 switch (srch_inf
->info_level
) {
2868 case SMB_FIND_FILE_DIRECTORY_INFO
:
2869 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
2870 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
2872 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
2873 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
2874 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
2877 cifs_dbg(VFS
, "info level %u isn't supported\n",
2878 srch_inf
->info_level
);
2883 req
->FileIndex
= cpu_to_le32(index
);
2884 req
->PersistentFileId
= persistent_fid
;
2885 req
->VolatileFileId
= volatile_fid
;
2888 bufptr
= req
->Buffer
;
2889 memcpy(bufptr
, &asteriks
, len
);
2891 req
->FileNameOffset
=
2892 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
2893 req
->FileNameLength
= cpu_to_le16(len
);
2895 * BB could be 30 bytes or so longer if we used SMB2 specific
2896 * buffer lengths, but this is safe and close enough.
2898 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
2899 output_size
= min_t(unsigned int, output_size
, 2 << 15);
2900 req
->OutputBufferLength
= cpu_to_le32(output_size
);
2902 iov
[0].iov_base
= (char *)req
;
2903 /* 4 for RFC1001 length and 1 for Buffer */
2904 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2906 iov
[1].iov_base
= (char *)(req
->Buffer
);
2907 iov
[1].iov_len
= len
;
2909 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
2911 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, flags
, &rsp_iov
);
2912 cifs_small_buf_release(req
);
2913 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
.iov_base
;
2916 if (rc
== -ENODATA
&&
2917 rsp
->hdr
.sync_hdr
.Status
== STATUS_NO_MORE_FILES
) {
2918 srch_inf
->endOfSearch
= true;
2921 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
2925 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2926 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2931 srch_inf
->unicode
= true;
2933 if (srch_inf
->ntwrk_buf_start
) {
2934 if (srch_inf
->smallBuf
)
2935 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
2937 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
2939 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
2940 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
2941 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
2942 /* 4 for rfc1002 length field */
2943 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
2944 srch_inf
->entries_in_buffer
=
2945 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
2946 &srch_inf
->last_entry
, info_buf_size
);
2947 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
2948 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
2949 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
2950 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
2951 if (resp_buftype
== CIFS_LARGE_BUFFER
)
2952 srch_inf
->smallBuf
= false;
2953 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
2954 srch_inf
->smallBuf
= true;
2956 cifs_dbg(VFS
, "illegal search buffer type\n");
2961 free_rsp_buf(resp_buftype
, rsp
);
2966 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2967 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
2968 unsigned int num
, void **data
, unsigned int *size
)
2970 struct smb2_set_info_req
*req
;
2971 struct smb2_set_info_rsp
*rsp
= NULL
;
2973 struct kvec rsp_iov
;
2977 struct TCP_Server_Info
*server
;
2978 struct cifs_ses
*ses
= tcon
->ses
;
2981 if (ses
&& (ses
->server
))
2982 server
= ses
->server
;
2989 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
2993 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
2999 if (encryption_required(tcon
))
3000 flags
|= CIFS_TRANSFORM_REQ
;
3002 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3004 req
->InfoType
= SMB2_O_INFO_FILE
;
3005 req
->FileInfoClass
= info_class
;
3006 req
->PersistentFileId
= persistent_fid
;
3007 req
->VolatileFileId
= volatile_fid
;
3009 /* 4 for RFC1001 length and 1 for Buffer */
3011 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
3012 req
->BufferLength
= cpu_to_le32(*size
);
3014 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
3016 memcpy(req
->Buffer
, *data
, *size
);
3018 iov
[0].iov_base
= (char *)req
;
3019 /* 4 for RFC1001 length */
3020 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
3022 for (i
= 1; i
< num
; i
++) {
3023 inc_rfc1001_len(req
, size
[i
]);
3024 le32_add_cpu(&req
->BufferLength
, size
[i
]);
3025 iov
[i
].iov_base
= (char *)data
[i
];
3026 iov
[i
].iov_len
= size
[i
];
3029 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, flags
, &rsp_iov
);
3030 cifs_small_buf_release(req
);
3031 rsp
= (struct smb2_set_info_rsp
*)rsp_iov
.iov_base
;
3034 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
3036 free_rsp_buf(resp_buftype
, rsp
);
3042 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
3043 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3045 struct smb2_file_rename_info info
;
3047 unsigned int size
[2];
3049 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3051 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
3055 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
3056 /* 0 = fail if target already exists */
3057 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3058 info
.FileNameLength
= cpu_to_le32(len
);
3061 size
[0] = sizeof(struct smb2_file_rename_info
);
3063 data
[1] = target_file
;
3064 size
[1] = len
+ 2 /* null */;
3066 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3067 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
3074 SMB2_rmdir(const unsigned int xid
, struct cifs_tcon
*tcon
,
3075 u64 persistent_fid
, u64 volatile_fid
)
3077 __u8 delete_pending
= 1;
3081 data
= &delete_pending
;
3082 size
= 1; /* sizeof __u8 */
3084 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3085 current
->tgid
, FILE_DISPOSITION_INFORMATION
, 1, &data
,
3090 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
3091 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3093 struct smb2_file_link_info info
;
3095 unsigned int size
[2];
3097 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3099 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
3103 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
3104 /* 0 = fail if link already exists */
3105 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3106 info
.FileNameLength
= cpu_to_le32(len
);
3109 size
[0] = sizeof(struct smb2_file_link_info
);
3111 data
[1] = target_file
;
3112 size
[1] = len
+ 2 /* null */;
3114 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3115 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
3121 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3122 u64 volatile_fid
, u32 pid
, __le64
*eof
, bool is_falloc
)
3124 struct smb2_file_eof_info info
;
3128 info
.EndOfFile
= *eof
;
3131 size
= sizeof(struct smb2_file_eof_info
);
3134 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3135 pid
, FILE_ALLOCATION_INFORMATION
, 1, &data
, &size
);
3137 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3138 pid
, FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
3142 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3143 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
3146 size
= sizeof(FILE_BASIC_INFO
);
3147 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3148 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
3149 (void **)&buf
, &size
);
3153 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3154 const u64 persistent_fid
, const u64 volatile_fid
,
3158 struct smb2_oplock_break
*req
= NULL
;
3159 int flags
= CIFS_OBREAK_OP
;
3161 cifs_dbg(FYI
, "SMB2_oplock_break\n");
3162 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
3166 if (encryption_required(tcon
))
3167 flags
|= CIFS_TRANSFORM_REQ
;
3169 req
->VolatileFid
= volatile_fid
;
3170 req
->PersistentFid
= persistent_fid
;
3171 req
->OplockLevel
= oplock_level
;
3172 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
3174 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, flags
);
3175 cifs_small_buf_release(req
);
3178 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3179 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
3186 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
3187 struct kstatfs
*kst
)
3189 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
3190 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
3191 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
3192 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
3193 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
3198 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
3199 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
3202 struct smb2_query_info_req
*req
;
3204 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
3206 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
3209 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
3213 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
3214 req
->FileInfoClass
= level
;
3215 req
->PersistentFileId
= persistent_fid
;
3216 req
->VolatileFileId
= volatile_fid
;
3217 /* 4 for rfc1002 length field and 1 for pad */
3218 req
->InputBufferOffset
=
3219 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
3220 req
->OutputBufferLength
= cpu_to_le32(
3221 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
3223 iov
->iov_base
= (char *)req
;
3224 /* 4 for rfc1002 length field */
3225 iov
->iov_len
= get_rfc1002_length(req
) + 4;
3230 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3231 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
3233 struct smb2_query_info_rsp
*rsp
= NULL
;
3235 struct kvec rsp_iov
;
3238 struct cifs_ses
*ses
= tcon
->ses
;
3239 struct smb2_fs_full_size_info
*info
= NULL
;
3242 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
3243 sizeof(struct smb2_fs_full_size_info
),
3244 persistent_fid
, volatile_fid
);
3248 if (encryption_required(tcon
))
3249 flags
|= CIFS_TRANSFORM_REQ
;
3251 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
3252 cifs_small_buf_release(iov
.iov_base
);
3254 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3257 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3259 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
3260 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
3261 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
3262 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
3263 sizeof(struct smb2_fs_full_size_info
));
3265 copy_fs_info_to_kstatfs(info
, fsdata
);
3268 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3273 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
3274 u64 persistent_fid
, u64 volatile_fid
, int level
)
3276 struct smb2_query_info_rsp
*rsp
= NULL
;
3278 struct kvec rsp_iov
;
3280 int resp_buftype
, max_len
, min_len
;
3281 struct cifs_ses
*ses
= tcon
->ses
;
3282 unsigned int rsp_len
, offset
;
3285 if (level
== FS_DEVICE_INFORMATION
) {
3286 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3287 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3288 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
3289 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
3290 min_len
= MIN_FS_ATTR_INFO_SIZE
;
3291 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3292 max_len
= sizeof(struct smb3_fs_ss_info
);
3293 min_len
= sizeof(struct smb3_fs_ss_info
);
3295 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
3299 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
3300 persistent_fid
, volatile_fid
);
3304 if (encryption_required(tcon
))
3305 flags
|= CIFS_TRANSFORM_REQ
;
3307 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
3308 cifs_small_buf_release(iov
.iov_base
);
3310 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3313 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3315 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
3316 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
3317 rc
= validate_buf(offset
, rsp_len
, &rsp
->hdr
, min_len
);
3321 if (level
== FS_ATTRIBUTE_INFORMATION
)
3322 memcpy(&tcon
->fsAttrInfo
, 4 /* RFC1001 len */ + offset
3323 + (char *)&rsp
->hdr
, min_t(unsigned int,
3325 else if (level
== FS_DEVICE_INFORMATION
)
3326 memcpy(&tcon
->fsDevInfo
, 4 /* RFC1001 len */ + offset
3327 + (char *)&rsp
->hdr
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
3328 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3329 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
3330 (4 /* RFC1001 len */ + offset
+ (char *)&rsp
->hdr
);
3331 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
3332 tcon
->perf_sector_size
=
3333 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
3337 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3342 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
3343 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3344 const __u32 num_lock
, struct smb2_lock_element
*buf
)
3347 struct smb2_lock_req
*req
= NULL
;
3349 struct kvec rsp_iov
;
3352 int flags
= CIFS_NO_RESP
;
3354 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
3356 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
3360 if (encryption_required(tcon
))
3361 flags
|= CIFS_TRANSFORM_REQ
;
3363 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3364 req
->LockCount
= cpu_to_le16(num_lock
);
3366 req
->PersistentFileId
= persist_fid
;
3367 req
->VolatileFileId
= volatile_fid
;
3369 count
= num_lock
* sizeof(struct smb2_lock_element
);
3370 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
3372 iov
[0].iov_base
= (char *)req
;
3373 /* 4 for rfc1002 length field and count for all locks */
3374 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
3375 iov
[1].iov_base
= (char *)buf
;
3376 iov
[1].iov_len
= count
;
3378 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
3379 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, flags
,
3381 cifs_small_buf_release(req
);
3383 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
3384 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
3391 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
3392 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3393 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
3396 struct smb2_lock_element lock
;
3398 lock
.Offset
= cpu_to_le64(offset
);
3399 lock
.Length
= cpu_to_le64(length
);
3400 lock
.Flags
= cpu_to_le32(lock_flags
);
3401 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
3402 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
3404 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
3408 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3409 __u8
*lease_key
, const __le32 lease_state
)
3412 struct smb2_lease_ack
*req
= NULL
;
3413 int flags
= CIFS_OBREAK_OP
;
3415 cifs_dbg(FYI
, "SMB2_lease_break\n");
3416 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
3420 if (encryption_required(tcon
))
3421 flags
|= CIFS_TRANSFORM_REQ
;
3423 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
3424 req
->StructureSize
= cpu_to_le16(36);
3425 inc_rfc1001_len(req
, 12);
3427 memcpy(req
->LeaseKey
, lease_key
, 16);
3428 req
->LeaseState
= lease_state
;
3430 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, flags
);
3431 cifs_small_buf_release(req
);
3434 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3435 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);