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"
53 * The following table defines the expected "StructureSize" of SMB2 requests
54 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
56 * Note that commands are defined in smb2pdu.h in le16 but the array below is
57 * indexed by command in host byte order.
59 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
60 /* SMB2_NEGOTIATE */ 36,
61 /* SMB2_SESSION_SETUP */ 25,
63 /* SMB2_TREE_CONNECT */ 9,
64 /* SMB2_TREE_DISCONNECT */ 4,
74 /* SMB2_QUERY_DIRECTORY */ 33,
75 /* SMB2_CHANGE_NOTIFY */ 32,
76 /* SMB2_QUERY_INFO */ 41,
77 /* SMB2_SET_INFO */ 33,
78 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
81 static int encryption_required(const struct cifs_tcon
*tcon
)
85 if ((tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
) ||
86 (tcon
->share_flags
& SHI1005_FLAGS_ENCRYPT_DATA
))
89 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
95 smb2_hdr_assemble(struct smb2_sync_hdr
*shdr
, __le16 smb2_cmd
,
96 const struct cifs_tcon
*tcon
)
98 shdr
->ProtocolId
= SMB2_PROTO_NUMBER
;
99 shdr
->StructureSize
= cpu_to_le16(64);
100 shdr
->Command
= smb2_cmd
;
101 if (tcon
&& tcon
->ses
&& tcon
->ses
->server
) {
102 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
104 spin_lock(&server
->req_lock
);
105 /* Request up to 2 credits but don't go over the limit. */
106 if (server
->credits
>= server
->max_credits
)
107 shdr
->CreditRequest
= cpu_to_le16(0);
109 shdr
->CreditRequest
= cpu_to_le16(
110 min_t(int, server
->max_credits
-
111 server
->credits
, 2));
112 spin_unlock(&server
->req_lock
);
114 shdr
->CreditRequest
= cpu_to_le16(2);
116 shdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
121 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
122 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
123 if ((tcon
->ses
) && (tcon
->ses
->server
) &&
124 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
125 shdr
->CreditCharge
= cpu_to_le16(1);
126 /* else CreditCharge MBZ */
128 shdr
->TreeId
= tcon
->tid
;
129 /* Uid is not converted */
131 shdr
->SessionId
= tcon
->ses
->Suid
;
134 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
135 * to pass the path on the Open SMB prefixed by \\server\share.
136 * Not sure when we would need to do the augmented path (if ever) and
137 * setting this flag breaks the SMB2 open operation since it is
138 * illegal to send an empty path name (without \\server\share prefix)
139 * when the DFS flag is set in the SMB open header. We could
140 * consider setting the flag on all operations other than open
141 * but it is safer to net set it for now.
143 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
144 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
146 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
&&
147 !encryption_required(tcon
))
148 shdr
->Flags
|= SMB2_FLAGS_SIGNED
;
154 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
157 struct nls_table
*nls_codepage
;
158 struct cifs_ses
*ses
;
159 struct TCP_Server_Info
*server
;
162 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
163 * check for tcp and smb session status done differently
164 * for those three - in the calling routine.
169 if (smb2_command
== SMB2_TREE_CONNECT
)
172 if (tcon
->tidStatus
== CifsExiting
) {
174 * only tree disconnect, open, and write,
175 * (and ulogoff which does not have tcon)
176 * are allowed as we start force umount.
178 if ((smb2_command
!= SMB2_WRITE
) &&
179 (smb2_command
!= SMB2_CREATE
) &&
180 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
181 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
186 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
187 (!tcon
->ses
->server
))
191 server
= ses
->server
;
194 * Give demultiplex thread up to 10 seconds to reconnect, should be
195 * greater than cifs socket timeout which is 7 seconds
197 while (server
->tcpStatus
== CifsNeedReconnect
) {
199 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
200 * here since they are implicitly done when session drops.
202 switch (smb2_command
) {
204 * BB Should we keep oplock break and add flush to exceptions?
206 case SMB2_TREE_DISCONNECT
:
209 case SMB2_OPLOCK_BREAK
:
213 wait_event_interruptible_timeout(server
->response_q
,
214 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
216 /* are we still trying to reconnect? */
217 if (server
->tcpStatus
!= CifsNeedReconnect
)
221 * on "soft" mounts we wait once. Hard mounts keep
222 * retrying until process is killed or server comes
226 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
231 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
234 nls_codepage
= load_nls_default();
237 * need to prevent multiple threads trying to simultaneously reconnect
238 * the same SMB session
240 mutex_lock(&tcon
->ses
->session_mutex
);
241 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
242 if (!rc
&& tcon
->ses
->need_reconnect
)
243 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
245 if (rc
|| !tcon
->need_reconnect
) {
246 mutex_unlock(&tcon
->ses
->session_mutex
);
250 cifs_mark_open_files_invalid(tcon
);
251 if (tcon
->use_persistent
)
252 tcon
->need_reopen_files
= true;
254 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
255 mutex_unlock(&tcon
->ses
->session_mutex
);
257 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
261 if (smb2_command
!= SMB2_INTERNAL_CMD
)
262 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
264 atomic_inc(&tconInfoReconnectCount
);
267 * Check if handle based operation so we know whether we can continue
268 * or not without returning to caller to reset file handle.
271 * BB Is flush done by server on drop of tcp session? Should we special
272 * case it and skip above?
274 switch (smb2_command
) {
280 case SMB2_QUERY_DIRECTORY
:
281 case SMB2_CHANGE_NOTIFY
:
282 case SMB2_QUERY_INFO
:
286 unload_nls(nls_codepage
);
291 fill_small_buf(__le16 smb2_command
, struct cifs_tcon
*tcon
, void *buf
,
292 unsigned int *total_len
)
294 struct smb2_sync_pdu
*spdu
= (struct smb2_sync_pdu
*)buf
;
295 /* lookup word count ie StructureSize from table */
296 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_command
)];
299 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
300 * largest operations (Create)
304 smb2_hdr_assemble(&spdu
->sync_hdr
, smb2_command
, tcon
);
305 spdu
->StructureSize2
= cpu_to_le16(parmsize
);
307 *total_len
= parmsize
+ sizeof(struct smb2_sync_hdr
);
310 /* init request without RFC1001 length at the beginning */
312 smb2_plain_req_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
313 void **request_buf
, unsigned int *total_len
)
316 struct smb2_sync_hdr
*shdr
;
318 rc
= smb2_reconnect(smb2_command
, tcon
);
322 /* BB eventually switch this to SMB2 specific small buf size */
323 *request_buf
= cifs_small_buf_get();
324 if (*request_buf
== NULL
) {
325 /* BB should we add a retry in here if not a writepage? */
329 shdr
= (struct smb2_sync_hdr
*)(*request_buf
);
331 fill_small_buf(smb2_command
, tcon
, shdr
, total_len
);
334 #ifdef CONFIG_CIFS_STATS2
335 uint16_t com_code
= le16_to_cpu(smb2_command
);
337 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
339 cifs_stats_inc(&tcon
->num_smbs_sent
);
346 * Allocate and return pointer to an SMB request hdr, and set basic
347 * SMB information in the SMB header. If the return code is zero, this
348 * function must have filled in request_buf pointer. The returned buffer
349 * has RFC1001 length at the beginning.
352 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
356 unsigned int total_len
;
357 struct smb2_pdu
*pdu
;
359 rc
= smb2_reconnect(smb2_command
, tcon
);
363 /* BB eventually switch this to SMB2 specific small buf size */
364 *request_buf
= cifs_small_buf_get();
365 if (*request_buf
== NULL
) {
366 /* BB should we add a retry in here if not a writepage? */
370 pdu
= (struct smb2_pdu
*)(*request_buf
);
372 fill_small_buf(smb2_command
, tcon
, get_sync_hdr(pdu
), &total_len
);
374 /* Note this is only network field converted to big endian */
375 pdu
->hdr
.smb2_buf_length
= cpu_to_be32(total_len
);
378 #ifdef CONFIG_CIFS_STATS2
379 uint16_t com_code
= le16_to_cpu(smb2_command
);
380 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
382 cifs_stats_inc(&tcon
->num_smbs_sent
);
388 #ifdef CONFIG_CIFS_SMB311
389 /* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
390 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
393 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
394 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
397 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
399 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
400 pneg_ctxt
->DataLength
= cpu_to_le16(38);
401 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
402 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
403 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
404 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
408 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
410 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
411 pneg_ctxt
->DataLength
= cpu_to_le16(6);
412 pneg_ctxt
->CipherCount
= cpu_to_le16(2);
413 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_GCM
;
414 pneg_ctxt
->Ciphers
[1] = SMB2_ENCRYPTION_AES128_CCM
;
418 assemble_neg_contexts(struct smb2_negotiate_req
*req
)
421 /* +4 is to account for the RFC1001 len field */
422 char *pneg_ctxt
= (char *)req
+ OFFSET_OF_NEG_CONTEXT
+ 4;
424 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
425 /* Add 2 to size to round to 8 byte boundary */
426 pneg_ctxt
+= 2 + sizeof(struct smb2_preauth_neg_context
);
427 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
428 req
->NegotiateContextOffset
= cpu_to_le32(OFFSET_OF_NEG_CONTEXT
);
429 req
->NegotiateContextCount
= cpu_to_le16(2);
430 inc_rfc1001_len(req
, 4 + sizeof(struct smb2_preauth_neg_context
) + 2
431 + sizeof(struct smb2_encryption_neg_context
)); /* calculate hash */
434 static void assemble_neg_contexts(struct smb2_negotiate_req
*req
)
442 * SMB2 Worker functions follow:
444 * The general structure of the worker functions is:
445 * 1) Call smb2_init (assembles SMB2 header)
446 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
447 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
448 * 4) Decode SMB2 command specific fields in the fixed length area
449 * 5) Decode variable length data area (if any for this SMB2 command type)
450 * 6) Call free smb buffer
456 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
458 struct smb2_negotiate_req
*req
;
459 struct smb2_negotiate_rsp
*rsp
;
464 struct TCP_Server_Info
*server
= ses
->server
;
465 int blob_offset
, blob_length
;
467 int flags
= CIFS_NEG_OP
;
469 cifs_dbg(FYI
, "Negotiate protocol\n");
472 WARN(1, "%s: server is NULL!\n", __func__
);
476 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
480 req
->hdr
.sync_hdr
.SessionId
= 0;
482 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
484 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
485 inc_rfc1001_len(req
, 2);
487 /* only one of SMB2 signing flags may be set in SMB2 request */
489 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
490 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
491 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
493 req
->SecurityMode
= 0;
495 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
497 /* ClientGUID must be zero for SMB2.02 dialect */
498 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
499 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
501 memcpy(req
->ClientGUID
, server
->client_guid
,
502 SMB2_CLIENT_GUID_SIZE
);
503 if (ses
->server
->vals
->protocol_id
== SMB311_PROT_ID
)
504 assemble_neg_contexts(req
);
506 iov
[0].iov_base
= (char *)req
;
507 /* 4 for rfc1002 length field */
508 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
510 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
511 cifs_small_buf_release(req
);
512 rsp
= (struct smb2_negotiate_rsp
*)rsp_iov
.iov_base
;
514 * No tcon so can't do
515 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
520 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
522 /* BB we may eventually want to match the negotiated vs. requested
523 dialect, even though we are only requesting one at a time */
524 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
525 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
526 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
527 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
528 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
529 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
530 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
531 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
532 #ifdef CONFIG_CIFS_SMB311
533 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
534 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
537 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
538 le16_to_cpu(rsp
->DialectRevision
));
542 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
544 /* SMB2 only has an extended negflavor */
545 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
546 /* set it to the maximum buffer size value we can send with 1 credit */
547 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
548 SMB2_MAX_BUFFER_SIZE
);
549 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
550 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
551 /* BB Do we need to validate the SecurityMode? */
552 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
553 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
555 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
557 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
560 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
562 * ses->sectype = RawNTLMSSP;
563 * but for time being this is our only auth choice so doesn't matter.
564 * We just found a server which sets blob length to zero expecting raw.
566 if (blob_length
== 0) {
567 cifs_dbg(FYI
, "missing security blob on negprot\n");
568 server
->sec_ntlmssp
= true;
571 rc
= cifs_enable_signing(server
, ses
->sign
);
575 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
582 free_rsp_buf(resp_buftype
, rsp
);
586 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
589 struct validate_negotiate_info_req vneg_inbuf
;
590 struct validate_negotiate_info_rsp
*pneg_rsp
;
593 cifs_dbg(FYI
, "validate negotiate\n");
596 * validation ioctl must be signed, so no point sending this if we
597 * can not sign it. We could eventually change this to selectively
598 * sign just this, the first and only signed request on a connection.
599 * This is good enough for now since a user who wants better security
600 * would also enable signing on the mount. Having validation of
601 * negotiate info for signed connections helps reduce attack vectors
603 if (tcon
->ses
->server
->sign
== false)
604 return 0; /* validation requires signing */
606 vneg_inbuf
.Capabilities
=
607 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
608 memcpy(vneg_inbuf
.Guid
, tcon
->ses
->server
->client_guid
,
609 SMB2_CLIENT_GUID_SIZE
);
612 vneg_inbuf
.SecurityMode
=
613 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
614 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
615 vneg_inbuf
.SecurityMode
=
616 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
618 vneg_inbuf
.SecurityMode
= 0;
620 vneg_inbuf
.DialectCount
= cpu_to_le16(1);
621 vneg_inbuf
.Dialects
[0] =
622 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
624 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
625 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
627 (char *)&vneg_inbuf
, sizeof(struct validate_negotiate_info_req
),
628 (char **)&pneg_rsp
, &rsplen
);
631 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
635 if (rsplen
!= sizeof(struct validate_negotiate_info_rsp
)) {
636 cifs_dbg(VFS
, "invalid protocol negotiate response size: %d\n",
639 /* relax check since Mac returns max bufsize allowed on ioctl */
640 if (rsplen
> CIFSMaxBufSize
)
644 /* check validate negotiate info response matches what we got earlier */
645 if (pneg_rsp
->Dialect
!=
646 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
))
649 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
652 /* do not validate server guid because not saved at negprot time yet */
654 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
655 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
658 /* validate negotiate successful */
659 cifs_dbg(FYI
, "validate negotiate info successful\n");
663 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
668 smb2_select_sectype(struct TCP_Server_Info
*server
, enum securityEnum requested
)
677 if (server
->sec_ntlmssp
&&
678 (global_secflags
& CIFSSEC_MAY_NTLMSSP
))
680 if ((server
->sec_kerberos
|| server
->sec_mskerberos
) &&
681 (global_secflags
& CIFSSEC_MAY_KRB5
))
689 struct SMB2_sess_data
{
691 struct cifs_ses
*ses
;
692 struct nls_table
*nls_cp
;
693 void (*func
)(struct SMB2_sess_data
*);
695 u64 previous_session
;
697 /* we will send the SMB in three pieces:
698 * a fixed length beginning part, an optional
699 * SPNEGO blob (which can be zero length), and a
700 * last part which will include the strings
701 * and rest of bcc area. This allows us to avoid
702 * a large buffer 17K allocation
709 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
712 struct cifs_ses
*ses
= sess_data
->ses
;
713 struct smb2_sess_setup_req
*req
;
714 struct TCP_Server_Info
*server
= ses
->server
;
716 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
720 /* First session, not a reauthenticate */
721 req
->hdr
.sync_hdr
.SessionId
= 0;
723 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
724 req
->PreviousSessionId
= sess_data
->previous_session
;
726 req
->Flags
= 0; /* MBZ */
727 /* to enable echos and oplocks */
728 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(3);
730 /* only one of SMB2 signing flags may be set in SMB2 request */
732 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
733 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
734 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
736 req
->SecurityMode
= 0;
738 req
->Capabilities
= 0;
739 req
->Channel
= 0; /* MBZ */
741 sess_data
->iov
[0].iov_base
= (char *)req
;
742 /* 4 for rfc1002 length field and 1 for pad */
743 sess_data
->iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
745 * This variable will be used to clear the buffer
746 * allocated above in case of any error in the calling function.
748 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
754 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
756 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
757 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
761 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
764 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
765 struct kvec rsp_iov
= { NULL
, 0 };
767 /* Testing shows that buffer offset must be at location of Buffer[0] */
768 req
->SecurityBufferOffset
=
769 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
770 1 /* pad */ - 4 /* rfc1001 len */);
771 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
773 inc_rfc1001_len(req
, sess_data
->iov
[1].iov_len
- 1 /* pad */);
775 /* BB add code to build os and lm fields */
777 rc
= SendReceive2(sess_data
->xid
, sess_data
->ses
,
779 &sess_data
->buf0_type
,
780 CIFS_LOG_ERROR
| CIFS_NEG_OP
, &rsp_iov
);
781 cifs_small_buf_release(sess_data
->iov
[0].iov_base
);
782 memcpy(&sess_data
->iov
[0], &rsp_iov
, sizeof(struct kvec
));
788 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
791 struct cifs_ses
*ses
= sess_data
->ses
;
793 mutex_lock(&ses
->server
->srv_mutex
);
794 if (ses
->server
->ops
->generate_signingkey
) {
795 rc
= ses
->server
->ops
->generate_signingkey(ses
);
798 "SMB3 session key generation failed\n");
799 mutex_unlock(&ses
->server
->srv_mutex
);
803 if (!ses
->server
->session_estab
) {
804 ses
->server
->sequence_number
= 0x2;
805 ses
->server
->session_estab
= true;
807 mutex_unlock(&ses
->server
->srv_mutex
);
809 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
810 spin_lock(&GlobalMid_Lock
);
811 ses
->status
= CifsGood
;
812 ses
->need_reconnect
= false;
813 spin_unlock(&GlobalMid_Lock
);
817 #ifdef CONFIG_CIFS_UPCALL
819 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
822 struct cifs_ses
*ses
= sess_data
->ses
;
823 struct cifs_spnego_msg
*msg
;
824 struct key
*spnego_key
= NULL
;
825 struct smb2_sess_setup_rsp
*rsp
= NULL
;
827 rc
= SMB2_sess_alloc_buffer(sess_data
);
831 spnego_key
= cifs_get_spnego_key(ses
);
832 if (IS_ERR(spnego_key
)) {
833 rc
= PTR_ERR(spnego_key
);
838 msg
= spnego_key
->payload
.data
[0];
840 * check version field to make sure that cifs.upcall is
841 * sending us a response in an expected form
843 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
845 "bad cifs.upcall version. Expected %d got %d",
846 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
848 goto out_put_spnego_key
;
851 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
853 if (!ses
->auth_key
.response
) {
855 "Kerberos can't allocate (%u bytes) memory",
858 goto out_put_spnego_key
;
860 ses
->auth_key
.len
= msg
->sesskey_len
;
862 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
863 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
865 rc
= SMB2_sess_sendreceive(sess_data
);
867 goto out_put_spnego_key
;
869 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
870 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
872 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
874 rc
= SMB2_sess_establish_session(sess_data
);
876 key_invalidate(spnego_key
);
879 sess_data
->result
= rc
;
880 sess_data
->func
= NULL
;
881 SMB2_sess_free_buffer(sess_data
);
885 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
887 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
888 sess_data
->result
= -EOPNOTSUPP
;
889 sess_data
->func
= NULL
;
894 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
897 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
900 struct cifs_ses
*ses
= sess_data
->ses
;
901 struct smb2_sess_setup_rsp
*rsp
= NULL
;
902 char *ntlmssp_blob
= NULL
;
903 bool use_spnego
= false; /* else use raw ntlmssp */
907 * If memory allocation is successful, caller of this function
910 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
915 ses
->ntlmssp
->sesskey_per_smbsess
= true;
917 rc
= SMB2_sess_alloc_buffer(sess_data
);
921 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
923 if (ntlmssp_blob
== NULL
) {
928 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
930 /* BB eventually need to add this */
931 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
935 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
936 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
938 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
939 sess_data
->iov
[1].iov_len
= blob_length
;
941 rc
= SMB2_sess_sendreceive(sess_data
);
942 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
944 /* If true, rc here is expected and not an error */
945 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
946 rsp
->hdr
.sync_hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
952 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
953 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
954 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
955 le16_to_cpu(rsp
->SecurityBufferOffset
));
959 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
960 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
964 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
967 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
968 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
972 SMB2_sess_free_buffer(sess_data
);
974 sess_data
->result
= 0;
975 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
981 sess_data
->result
= rc
;
982 sess_data
->func
= NULL
;
986 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
989 struct cifs_ses
*ses
= sess_data
->ses
;
990 struct smb2_sess_setup_req
*req
;
991 struct smb2_sess_setup_rsp
*rsp
= NULL
;
992 unsigned char *ntlmssp_blob
= NULL
;
993 bool use_spnego
= false; /* else use raw ntlmssp */
996 rc
= SMB2_sess_alloc_buffer(sess_data
);
1000 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
1001 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1003 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
, ses
,
1006 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
1011 /* BB eventually need to add this */
1012 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1016 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1017 sess_data
->iov
[1].iov_len
= blob_length
;
1019 rc
= SMB2_sess_sendreceive(sess_data
);
1023 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1025 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
1026 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1028 rc
= SMB2_sess_establish_session(sess_data
);
1030 kfree(ntlmssp_blob
);
1031 SMB2_sess_free_buffer(sess_data
);
1032 kfree(ses
->ntlmssp
);
1033 ses
->ntlmssp
= NULL
;
1034 sess_data
->result
= rc
;
1035 sess_data
->func
= NULL
;
1039 SMB2_select_sec(struct cifs_ses
*ses
, struct SMB2_sess_data
*sess_data
)
1043 type
= smb2_select_sectype(ses
->server
, ses
->sectype
);
1044 cifs_dbg(FYI
, "sess setup type %d\n", type
);
1045 if (type
== Unspecified
) {
1047 "Unable to select appropriate authentication method!");
1053 sess_data
->func
= SMB2_auth_kerberos
;
1056 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
1059 cifs_dbg(VFS
, "secType %d not supported!\n", type
);
1067 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
1068 const struct nls_table
*nls_cp
)
1071 struct TCP_Server_Info
*server
= ses
->server
;
1072 struct SMB2_sess_data
*sess_data
;
1074 cifs_dbg(FYI
, "Session Setup\n");
1077 WARN(1, "%s: server is NULL!\n", __func__
);
1081 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
1085 rc
= SMB2_select_sec(ses
, sess_data
);
1088 sess_data
->xid
= xid
;
1089 sess_data
->ses
= ses
;
1090 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1091 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1093 while (sess_data
->func
)
1094 sess_data
->func(sess_data
);
1096 rc
= sess_data
->result
;
1103 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1105 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1107 struct TCP_Server_Info
*server
;
1110 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1112 if (ses
&& (ses
->server
))
1113 server
= ses
->server
;
1117 /* no need to send SMB logoff if uid already closed due to reconnect */
1118 if (ses
->need_reconnect
)
1119 goto smb2_session_already_dead
;
1121 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
1125 /* since no tcon, smb2_init can not do this, so do here */
1126 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1128 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
1129 flags
|= CIFS_TRANSFORM_REQ
;
1130 else if (server
->sign
)
1131 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1133 rc
= SendReceiveNoRsp(xid
, ses
, (char *) req
, flags
);
1134 cifs_small_buf_release(req
);
1136 * No tcon so can't do
1137 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1140 smb2_session_already_dead
:
1144 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1146 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1149 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1151 /* These are similar values to what Windows uses */
1152 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1154 tcon
->max_chunks
= 256;
1155 tcon
->max_bytes_chunk
= 1048576;
1156 tcon
->max_bytes_copy
= 16777216;
1160 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1161 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1163 struct smb2_tree_connect_req
*req
;
1164 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1166 struct kvec rsp_iov
;
1170 struct TCP_Server_Info
*server
;
1171 __le16
*unc_path
= NULL
;
1174 cifs_dbg(FYI
, "TCON\n");
1176 if ((ses
->server
) && tree
)
1177 server
= ses
->server
;
1181 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1182 if (unc_path
== NULL
)
1185 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1187 if (unc_path_len
< 2) {
1192 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1196 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
1203 if ((ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
))
1204 flags
|= CIFS_TRANSFORM_REQ
;
1206 /* since no tcon, smb2_init can not do this, so do here */
1207 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1208 if (ses
->server
->sign
)
1209 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1210 } else if (encryption_required(tcon
))
1211 flags
|= CIFS_TRANSFORM_REQ
;
1213 iov
[0].iov_base
= (char *)req
;
1214 /* 4 for rfc1002 length field and 1 for pad */
1215 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1217 /* Testing shows that buffer offset must be at location of Buffer[0] */
1218 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1219 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1220 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1221 iov
[1].iov_base
= unc_path
;
1222 iov
[1].iov_len
= unc_path_len
;
1224 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
1226 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, flags
, &rsp_iov
);
1227 cifs_small_buf_release(req
);
1228 rsp
= (struct smb2_tree_connect_rsp
*)rsp_iov
.iov_base
;
1232 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1233 tcon
->need_reconnect
= true;
1235 goto tcon_error_exit
;
1239 ses
->ipc_tid
= rsp
->hdr
.sync_hdr
.TreeId
;
1243 switch (rsp
->ShareType
) {
1244 case SMB2_SHARE_TYPE_DISK
:
1245 cifs_dbg(FYI
, "connection to disk share\n");
1247 case SMB2_SHARE_TYPE_PIPE
:
1249 cifs_dbg(FYI
, "connection to pipe share\n");
1251 case SMB2_SHARE_TYPE_PRINT
:
1253 cifs_dbg(FYI
, "connection to printer\n");
1256 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1258 goto tcon_error_exit
;
1261 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1262 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1263 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1264 tcon
->tidStatus
= CifsGood
;
1265 tcon
->need_reconnect
= false;
1266 tcon
->tid
= rsp
->hdr
.sync_hdr
.TreeId
;
1267 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1269 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1270 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1271 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1274 !(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
1275 cifs_dbg(VFS
, "Encryption is requested but not supported\n");
1277 init_copy_chunk_defaults(tcon
);
1278 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1279 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1281 free_rsp_buf(resp_buftype
, rsp
);
1286 if (rsp
->hdr
.sync_hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1287 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1293 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1295 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1297 struct TCP_Server_Info
*server
;
1298 struct cifs_ses
*ses
= tcon
->ses
;
1301 cifs_dbg(FYI
, "Tree Disconnect\n");
1303 if (ses
&& (ses
->server
))
1304 server
= ses
->server
;
1308 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1311 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
1315 if (encryption_required(tcon
))
1316 flags
|= CIFS_TRANSFORM_REQ
;
1318 rc
= SendReceiveNoRsp(xid
, ses
, (char *)req
, flags
);
1319 cifs_small_buf_release(req
);
1321 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1327 static struct create_durable
*
1328 create_durable_buf(void)
1330 struct create_durable
*buf
;
1332 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1336 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1337 (struct create_durable
, Data
));
1338 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1339 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1340 (struct create_durable
, Name
));
1341 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1342 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1350 static struct create_durable
*
1351 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1353 struct create_durable
*buf
;
1355 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1359 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1360 (struct create_durable
, Data
));
1361 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1362 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1363 (struct create_durable
, Name
));
1364 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1365 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1366 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1367 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1376 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1377 unsigned int *epoch
)
1380 struct create_context
*cc
;
1382 unsigned int remaining
;
1385 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
1386 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
1387 cc
= (struct create_context
*)data_offset
;
1388 while (remaining
>= sizeof(struct create_context
)) {
1389 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1390 if (le16_to_cpu(cc
->NameLength
) == 4 &&
1391 strncmp(name
, "RqLs", 4) == 0)
1392 return server
->ops
->parse_lease_buf(cc
, epoch
);
1394 next
= le32_to_cpu(cc
->Next
);
1398 cc
= (struct create_context
*)((char *)cc
+ next
);
1405 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1406 unsigned int *num_iovec
, __u8
*oplock
)
1408 struct smb2_create_req
*req
= iov
[0].iov_base
;
1409 unsigned int num
= *num_iovec
;
1411 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1412 if (iov
[num
].iov_base
== NULL
)
1414 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1415 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1416 if (!req
->CreateContextsOffset
)
1417 req
->CreateContextsOffset
= cpu_to_le32(
1418 sizeof(struct smb2_create_req
) - 4 +
1419 iov
[num
- 1].iov_len
);
1420 le32_add_cpu(&req
->CreateContextsLength
,
1421 server
->vals
->create_lease_size
);
1422 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
1423 *num_iovec
= num
+ 1;
1427 static struct create_durable_v2
*
1428 create_durable_v2_buf(struct cifs_fid
*pfid
)
1430 struct create_durable_v2
*buf
;
1432 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1436 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1437 (struct create_durable_v2
, dcontext
));
1438 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1439 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1440 (struct create_durable_v2
, Name
));
1441 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1443 buf
->dcontext
.Timeout
= 0; /* Should this be configurable by workload */
1444 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1445 generate_random_uuid(buf
->dcontext
.CreateGuid
);
1446 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1448 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1456 static struct create_durable_handle_reconnect_v2
*
1457 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1459 struct create_durable_handle_reconnect_v2
*buf
;
1461 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1466 buf
->ccontext
.DataOffset
=
1467 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1469 buf
->ccontext
.DataLength
=
1470 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1471 buf
->ccontext
.NameOffset
=
1472 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1474 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1476 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1477 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1478 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1479 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1481 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1490 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1491 struct cifs_open_parms
*oparms
)
1493 struct smb2_create_req
*req
= iov
[0].iov_base
;
1494 unsigned int num
= *num_iovec
;
1496 iov
[num
].iov_base
= create_durable_v2_buf(oparms
->fid
);
1497 if (iov
[num
].iov_base
== NULL
)
1499 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1500 if (!req
->CreateContextsOffset
)
1501 req
->CreateContextsOffset
=
1502 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1504 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1505 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable_v2
));
1506 *num_iovec
= num
+ 1;
1511 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1512 struct cifs_open_parms
*oparms
)
1514 struct smb2_create_req
*req
= iov
[0].iov_base
;
1515 unsigned int num
= *num_iovec
;
1517 /* indicate that we don't need to relock the file */
1518 oparms
->reconnect
= false;
1520 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1521 if (iov
[num
].iov_base
== NULL
)
1523 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1524 if (!req
->CreateContextsOffset
)
1525 req
->CreateContextsOffset
=
1526 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1528 le32_add_cpu(&req
->CreateContextsLength
,
1529 sizeof(struct create_durable_handle_reconnect_v2
));
1530 inc_rfc1001_len(&req
->hdr
,
1531 sizeof(struct create_durable_handle_reconnect_v2
));
1532 *num_iovec
= num
+ 1;
1537 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1538 struct cifs_open_parms
*oparms
, bool use_persistent
)
1540 struct smb2_create_req
*req
= iov
[0].iov_base
;
1541 unsigned int num
= *num_iovec
;
1543 if (use_persistent
) {
1544 if (oparms
->reconnect
)
1545 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1548 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1551 if (oparms
->reconnect
) {
1552 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1553 /* indicate that we don't need to relock the file */
1554 oparms
->reconnect
= false;
1556 iov
[num
].iov_base
= create_durable_buf();
1557 if (iov
[num
].iov_base
== NULL
)
1559 iov
[num
].iov_len
= sizeof(struct create_durable
);
1560 if (!req
->CreateContextsOffset
)
1561 req
->CreateContextsOffset
=
1562 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1564 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1565 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
1566 *num_iovec
= num
+ 1;
1571 alloc_path_with_tree_prefix(__le16
**out_path
, int *out_size
, int *out_len
,
1572 const char *treename
, const __le16
*path
)
1574 int treename_len
, path_len
;
1575 struct nls_table
*cp
;
1576 const __le16 sep
[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1581 treename_len
= strlen(treename
);
1582 if (treename_len
< 2 || !(treename
[0] == '\\' && treename
[1] == '\\'))
1588 path_len
= UniStrnlen((wchar_t *)path
, PATH_MAX
);
1591 * make room for one path separator between the treename and
1594 *out_len
= treename_len
+ 1 + path_len
;
1597 * final path needs to be null-terminated UTF16 with a
1601 *out_size
= roundup((*out_len
+1)*2, 8);
1602 *out_path
= kzalloc(*out_size
, GFP_KERNEL
);
1606 cp
= load_nls_default();
1607 cifs_strtoUTF16(*out_path
, treename
, treename_len
, cp
);
1608 UniStrcat(*out_path
, sep
);
1609 UniStrcat(*out_path
, path
);
1616 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1617 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1618 struct smb2_err_rsp
**err_buf
)
1620 struct smb2_create_req
*req
;
1621 struct smb2_create_rsp
*rsp
;
1622 struct TCP_Server_Info
*server
;
1623 struct cifs_tcon
*tcon
= oparms
->tcon
;
1624 struct cifs_ses
*ses
= tcon
->ses
;
1626 struct kvec rsp_iov
;
1629 __le16
*copy_path
= NULL
;
1632 unsigned int n_iov
= 2;
1633 __u32 file_attributes
= 0;
1634 char *dhc_buf
= NULL
, *lc_buf
= NULL
;
1637 cifs_dbg(FYI
, "create/open\n");
1639 if (ses
&& (ses
->server
))
1640 server
= ses
->server
;
1644 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1648 if (encryption_required(tcon
))
1649 flags
|= CIFS_TRANSFORM_REQ
;
1651 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1652 file_attributes
|= ATTR_READONLY
;
1653 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
1654 file_attributes
|= ATTR_SYSTEM
;
1656 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1657 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1658 /* File attributes ignored on open (used in create though) */
1659 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1660 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1661 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1662 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1664 iov
[0].iov_base
= (char *)req
;
1665 /* 4 for rfc1002 length field */
1666 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1667 /* -1 since last byte is buf[0] which is sent below (path) */
1670 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
1672 /* [MS-SMB2] 2.2.13 NameOffset:
1673 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1674 * the SMB2 header, the file name includes a prefix that will
1675 * be processed during DFS name normalization as specified in
1676 * section 3.3.5.9. Otherwise, the file name is relative to
1677 * the share that is identified by the TreeId in the SMB2
1680 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
1683 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
1684 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
1686 tcon
->treeName
, path
);
1689 req
->NameLength
= cpu_to_le16(name_len
* 2);
1690 uni_path_len
= copy_size
;
1693 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1694 /* MUST set path len (NameLength) to 0 opening root of share */
1695 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1696 if (uni_path_len
% 8 != 0) {
1697 copy_size
= roundup(uni_path_len
, 8);
1698 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1701 memcpy((char *)copy_path
, (const char *)path
,
1703 uni_path_len
= copy_size
;
1708 iov
[1].iov_len
= uni_path_len
;
1709 iov
[1].iov_base
= path
;
1710 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1711 inc_rfc1001_len(req
, uni_path_len
- 1);
1713 if (!server
->oplocks
)
1714 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1716 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1717 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1718 req
->RequestedOplockLevel
= *oplock
;
1720 rc
= add_lease_context(server
, iov
, &n_iov
, oplock
);
1722 cifs_small_buf_release(req
);
1726 lc_buf
= iov
[n_iov
-1].iov_base
;
1729 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1730 /* need to set Next field of lease context if we request it */
1731 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
1732 struct create_context
*ccontext
=
1733 (struct create_context
*)iov
[n_iov
-1].iov_base
;
1735 cpu_to_le32(server
->vals
->create_lease_size
);
1738 rc
= add_durable_context(iov
, &n_iov
, oparms
,
1739 tcon
->use_persistent
);
1741 cifs_small_buf_release(req
);
1746 dhc_buf
= iov
[n_iov
-1].iov_base
;
1749 rc
= SendReceive2(xid
, ses
, iov
, n_iov
, &resp_buftype
, flags
, &rsp_iov
);
1750 cifs_small_buf_release(req
);
1751 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
1754 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1756 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1761 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1762 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1765 memcpy(buf
, &rsp
->CreationTime
, 32);
1766 buf
->AllocationSize
= rsp
->AllocationSize
;
1767 buf
->EndOfFile
= rsp
->EndofFile
;
1768 buf
->Attributes
= rsp
->FileAttributes
;
1769 buf
->NumberOfLinks
= cpu_to_le32(1);
1770 buf
->DeletePending
= 0;
1773 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1774 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1776 *oplock
= rsp
->OplockLevel
;
1781 free_rsp_buf(resp_buftype
, rsp
);
1786 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1789 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1790 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, bool use_ipc
,
1791 char *in_data
, u32 indatalen
,
1792 char **out_data
, u32
*plen
/* returned data len */)
1794 struct smb2_ioctl_req
*req
;
1795 struct smb2_ioctl_rsp
*rsp
;
1796 struct smb2_sync_hdr
*shdr
;
1797 struct TCP_Server_Info
*server
;
1798 struct cifs_ses
*ses
;
1800 struct kvec rsp_iov
;
1806 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1808 if (out_data
!= NULL
)
1811 /* zero out returned data len, in case of error */
1820 if (ses
&& (ses
->server
))
1821 server
= ses
->server
;
1825 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1830 if (ses
->ipc_tid
== 0) {
1831 cifs_small_buf_release(req
);
1835 cifs_dbg(FYI
, "replacing tid 0x%x with IPC tid 0x%x\n",
1836 req
->hdr
.sync_hdr
.TreeId
, ses
->ipc_tid
);
1837 req
->hdr
.sync_hdr
.TreeId
= ses
->ipc_tid
;
1839 if (encryption_required(tcon
))
1840 flags
|= CIFS_TRANSFORM_REQ
;
1842 req
->CtlCode
= cpu_to_le32(opcode
);
1843 req
->PersistentFileId
= persistent_fid
;
1844 req
->VolatileFileId
= volatile_fid
;
1847 req
->InputCount
= cpu_to_le32(indatalen
);
1848 /* do not set InputOffset if no input data */
1850 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1851 iov
[1].iov_base
= in_data
;
1852 iov
[1].iov_len
= indatalen
;
1857 req
->OutputOffset
= 0;
1858 req
->OutputCount
= 0; /* MBZ */
1861 * Could increase MaxOutputResponse, but that would require more
1862 * than one credit. Windows typically sets this smaller, but for some
1863 * ioctls it may be useful to allow server to send more. No point
1864 * limiting what the server can send as long as fits in one credit
1865 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
1866 * (by default, note that it can be overridden to make max larger)
1867 * in responses (except for read responses which can be bigger.
1868 * We may want to bump this limit up
1870 req
->MaxOutputResponse
= cpu_to_le32(CIFSMaxBufSize
);
1873 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1877 iov
[0].iov_base
= (char *)req
;
1880 * If no input data, the size of ioctl struct in
1881 * protocol spec still includes a 1 byte data buffer,
1882 * but if input data passed to ioctl, we do not
1883 * want to double count this, so we do not send
1884 * the dummy one byte of data in iovec[0] if sending
1885 * input data (in iovec[1]). We also must add 4 bytes
1886 * in first iovec to allow for rfc1002 length field.
1890 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1891 inc_rfc1001_len(req
, indatalen
- 1);
1893 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1896 rc
= SendReceive2(xid
, ses
, iov
, n_iov
, &resp_buftype
, flags
, &rsp_iov
);
1897 cifs_small_buf_release(req
);
1898 rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
.iov_base
;
1900 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
1901 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1903 } else if (rc
== -EINVAL
) {
1904 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
1905 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
1906 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1911 /* check if caller wants to look at return data or just return rc */
1912 if ((plen
== NULL
) || (out_data
== NULL
))
1915 *plen
= le32_to_cpu(rsp
->OutputCount
);
1917 /* We check for obvious errors in the output buffer length and offset */
1919 goto ioctl_exit
; /* server returned no data */
1920 else if (*plen
> 0xFF00) {
1921 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1927 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1928 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1929 le32_to_cpu(rsp
->OutputOffset
));
1935 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1936 if (*out_data
== NULL
) {
1941 shdr
= get_sync_hdr(rsp
);
1942 memcpy(*out_data
, (char *)shdr
+ le32_to_cpu(rsp
->OutputOffset
), *plen
);
1944 free_rsp_buf(resp_buftype
, rsp
);
1949 * Individual callers to ioctl worker function follow
1953 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
1954 u64 persistent_fid
, u64 volatile_fid
)
1957 struct compress_ioctl fsctl_input
;
1958 char *ret_data
= NULL
;
1960 fsctl_input
.CompressionState
=
1961 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
1963 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
1964 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
1965 false /* use_ipc */,
1966 (char *)&fsctl_input
/* data input */,
1967 2 /* in data len */, &ret_data
/* out data */, NULL
);
1969 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
1975 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1976 u64 persistent_fid
, u64 volatile_fid
)
1978 struct smb2_close_req
*req
;
1979 struct smb2_close_rsp
*rsp
;
1980 struct TCP_Server_Info
*server
;
1981 struct cifs_ses
*ses
= tcon
->ses
;
1983 struct kvec rsp_iov
;
1988 cifs_dbg(FYI
, "Close\n");
1990 if (ses
&& (ses
->server
))
1991 server
= ses
->server
;
1995 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1999 if (encryption_required(tcon
))
2000 flags
|= CIFS_TRANSFORM_REQ
;
2002 req
->PersistentFileId
= persistent_fid
;
2003 req
->VolatileFileId
= volatile_fid
;
2005 iov
[0].iov_base
= (char *)req
;
2006 /* 4 for rfc1002 length field */
2007 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2009 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2010 cifs_small_buf_release(req
);
2011 rsp
= (struct smb2_close_rsp
*)rsp_iov
.iov_base
;
2014 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
2018 /* BB FIXME - decode close response, update inode for caching */
2021 free_rsp_buf(resp_buftype
, rsp
);
2026 validate_buf(unsigned int offset
, unsigned int buffer_length
,
2027 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
2030 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
2031 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
2032 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
2033 char *end_of_buf
= begin_of_buf
+ buffer_length
;
2036 if (buffer_length
< min_buf_size
) {
2037 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
2038 buffer_length
, min_buf_size
);
2042 /* check if beyond RFC1001 maximum length */
2043 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
2044 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
2045 buffer_length
, smb_len
);
2049 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
2050 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
2058 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2059 * Caller must free buffer.
2062 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
2063 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
2067 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
2073 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
2077 memcpy(data
, begin_of_buf
, buffer_length
);
2083 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2084 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
2085 size_t output_len
, size_t min_len
, void *data
)
2087 struct smb2_query_info_req
*req
;
2088 struct smb2_query_info_rsp
*rsp
= NULL
;
2090 struct kvec rsp_iov
;
2093 struct TCP_Server_Info
*server
;
2094 struct cifs_ses
*ses
= tcon
->ses
;
2097 cifs_dbg(FYI
, "Query Info\n");
2099 if (ses
&& (ses
->server
))
2100 server
= ses
->server
;
2104 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2108 if (encryption_required(tcon
))
2109 flags
|= CIFS_TRANSFORM_REQ
;
2111 req
->InfoType
= SMB2_O_INFO_FILE
;
2112 req
->FileInfoClass
= info_class
;
2113 req
->PersistentFileId
= persistent_fid
;
2114 req
->VolatileFileId
= volatile_fid
;
2115 /* 4 for rfc1002 length field and 1 for Buffer */
2116 req
->InputBufferOffset
=
2117 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2118 req
->OutputBufferLength
= cpu_to_le32(output_len
);
2120 iov
[0].iov_base
= (char *)req
;
2121 /* 4 for rfc1002 length field */
2122 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2124 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2125 cifs_small_buf_release(req
);
2126 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
2129 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2133 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2134 le32_to_cpu(rsp
->OutputBufferLength
),
2135 &rsp
->hdr
, min_len
, data
);
2138 free_rsp_buf(resp_buftype
, rsp
);
2143 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2144 u64 persistent_fid
, u64 volatile_fid
,
2145 struct smb2_file_all_info
*data
)
2147 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2148 FILE_ALL_INFORMATION
,
2149 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
2150 sizeof(struct smb2_file_all_info
), data
);
2154 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
2155 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
2157 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2158 FILE_INTERNAL_INFORMATION
,
2159 sizeof(struct smb2_file_internal_info
),
2160 sizeof(struct smb2_file_internal_info
), uniqueid
);
2164 * This is a no-op for now. We're not really interested in the reply, but
2165 * rather in the fact that the server sent one and that server->lstrp
2168 * FIXME: maybe we should consider checking that the reply matches request?
2171 smb2_echo_callback(struct mid_q_entry
*mid
)
2173 struct TCP_Server_Info
*server
= mid
->callback_data
;
2174 struct smb2_echo_rsp
*rsp
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
2175 unsigned int credits_received
= 1;
2177 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
2178 credits_received
= le16_to_cpu(rsp
->hdr
.sync_hdr
.CreditRequest
);
2180 DeleteMidQEntry(mid
);
2181 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
2184 void smb2_reconnect_server(struct work_struct
*work
)
2186 struct TCP_Server_Info
*server
= container_of(work
,
2187 struct TCP_Server_Info
, reconnect
.work
);
2188 struct cifs_ses
*ses
;
2189 struct cifs_tcon
*tcon
, *tcon2
;
2190 struct list_head tmp_list
;
2191 int tcon_exist
= false;
2193 int resched
= false;
2196 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2197 mutex_lock(&server
->reconnect_mutex
);
2199 INIT_LIST_HEAD(&tmp_list
);
2200 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
2202 spin_lock(&cifs_tcp_ses_lock
);
2203 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
2204 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
2205 if (tcon
->need_reconnect
|| tcon
->need_reopen_files
) {
2207 list_add_tail(&tcon
->rlist
, &tmp_list
);
2213 * Get the reference to server struct to be sure that the last call of
2214 * cifs_put_tcon() in the loop below won't release the server pointer.
2217 server
->srv_count
++;
2219 spin_unlock(&cifs_tcp_ses_lock
);
2221 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
2222 rc
= smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
);
2224 cifs_reopen_persistent_handles(tcon
);
2227 list_del_init(&tcon
->rlist
);
2228 cifs_put_tcon(tcon
);
2231 cifs_dbg(FYI
, "Reconnecting tcons finished\n");
2233 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 2 * HZ
);
2234 mutex_unlock(&server
->reconnect_mutex
);
2236 /* now we can safely release srv struct */
2238 cifs_put_tcp_session(server
, 1);
2242 SMB2_echo(struct TCP_Server_Info
*server
)
2244 struct smb2_echo_req
*req
;
2247 struct smb_rqst rqst
= { .rq_iov
= iov
,
2250 cifs_dbg(FYI
, "In echo request\n");
2252 if (server
->tcpStatus
== CifsNeedNegotiate
) {
2253 /* No need to send echo on newly established connections */
2254 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
2258 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
2262 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
2264 /* 4 for rfc1002 length field */
2266 iov
[0].iov_base
= (char *)req
;
2267 iov
[1].iov_len
= get_rfc1002_length(req
);
2268 iov
[1].iov_base
= (char *)req
+ 4;
2270 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, NULL
,
2271 server
, CIFS_ECHO_OP
);
2273 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
2275 cifs_small_buf_release(req
);
2280 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2283 struct smb2_flush_req
*req
;
2284 struct TCP_Server_Info
*server
;
2285 struct cifs_ses
*ses
= tcon
->ses
;
2287 struct kvec rsp_iov
;
2292 cifs_dbg(FYI
, "Flush\n");
2294 if (ses
&& (ses
->server
))
2295 server
= ses
->server
;
2299 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
2303 if (encryption_required(tcon
))
2304 flags
|= CIFS_TRANSFORM_REQ
;
2306 req
->PersistentFileId
= persistent_fid
;
2307 req
->VolatileFileId
= volatile_fid
;
2309 iov
[0].iov_base
= (char *)req
;
2310 /* 4 for rfc1002 length field */
2311 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2313 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2314 cifs_small_buf_release(req
);
2317 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
2319 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2324 * To form a chain of read requests, any read requests after the first should
2325 * have the end_of_chain boolean set to true.
2328 smb2_new_read_req(void **buf
, unsigned int *total_len
,
2329 struct cifs_io_parms
*io_parms
, unsigned int remaining_bytes
,
2333 struct smb2_read_plain_req
*req
= NULL
;
2334 struct smb2_sync_hdr
*shdr
;
2336 rc
= smb2_plain_req_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
,
2340 if (io_parms
->tcon
->ses
->server
== NULL
)
2341 return -ECONNABORTED
;
2343 shdr
= &req
->sync_hdr
;
2344 shdr
->ProcessId
= cpu_to_le32(io_parms
->pid
);
2346 req
->PersistentFileId
= io_parms
->persistent_fid
;
2347 req
->VolatileFileId
= io_parms
->volatile_fid
;
2348 req
->ReadChannelInfoOffset
= 0; /* reserved */
2349 req
->ReadChannelInfoLength
= 0; /* reserved */
2350 req
->Channel
= 0; /* reserved */
2351 req
->MinimumCount
= 0;
2352 req
->Length
= cpu_to_le32(io_parms
->length
);
2353 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2355 if (request_type
& CHAINED_REQUEST
) {
2356 if (!(request_type
& END_OF_CHAIN
)) {
2357 /* next 8-byte aligned request */
2358 *total_len
= DIV_ROUND_UP(*total_len
, 8) * 8;
2359 shdr
->NextCommand
= cpu_to_le32(*total_len
);
2360 } else /* END_OF_CHAIN */
2361 shdr
->NextCommand
= 0;
2362 if (request_type
& RELATED_REQUEST
) {
2363 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
2365 * Related requests use info from previous read request
2368 shdr
->SessionId
= 0xFFFFFFFF;
2369 shdr
->TreeId
= 0xFFFFFFFF;
2370 req
->PersistentFileId
= 0xFFFFFFFF;
2371 req
->VolatileFileId
= 0xFFFFFFFF;
2374 if (remaining_bytes
> io_parms
->length
)
2375 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
2377 req
->RemainingBytes
= 0;
2384 smb2_readv_callback(struct mid_q_entry
*mid
)
2386 struct cifs_readdata
*rdata
= mid
->callback_data
;
2387 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2388 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2389 struct smb2_sync_hdr
*shdr
=
2390 (struct smb2_sync_hdr
*)rdata
->iov
[1].iov_base
;
2391 unsigned int credits_received
= 1;
2392 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2394 .rq_pages
= rdata
->pages
,
2395 .rq_npages
= rdata
->nr_pages
,
2396 .rq_pagesz
= rdata
->pagesz
,
2397 .rq_tailsz
= rdata
->tailsz
};
2399 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2400 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
2403 switch (mid
->mid_state
) {
2404 case MID_RESPONSE_RECEIVED
:
2405 credits_received
= le16_to_cpu(shdr
->CreditRequest
);
2406 /* result already set, check signature */
2407 if (server
->sign
&& !mid
->decrypted
) {
2410 rc
= smb2_verify_signature(&rqst
, server
);
2412 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
2415 /* FIXME: should this be counted toward the initiating task? */
2416 task_io_account_read(rdata
->got_bytes
);
2417 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2419 case MID_REQUEST_SUBMITTED
:
2420 case MID_RETRY_NEEDED
:
2421 rdata
->result
= -EAGAIN
;
2422 if (server
->sign
&& rdata
->got_bytes
)
2423 /* reset bytes number since we can not check a sign */
2424 rdata
->got_bytes
= 0;
2425 /* FIXME: should this be counted toward the initiating task? */
2426 task_io_account_read(rdata
->got_bytes
);
2427 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2430 if (rdata
->result
!= -ENODATA
)
2431 rdata
->result
= -EIO
;
2435 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
2437 queue_work(cifsiod_wq
, &rdata
->work
);
2438 DeleteMidQEntry(mid
);
2439 add_credits(server
, credits_received
, 0);
2442 /* smb2_async_readv - send an async read, and set up mid to handle result */
2444 smb2_async_readv(struct cifs_readdata
*rdata
)
2448 struct smb2_sync_hdr
*shdr
;
2449 struct cifs_io_parms io_parms
;
2450 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2452 struct TCP_Server_Info
*server
;
2453 unsigned int total_len
;
2456 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
2457 __func__
, rdata
->offset
, rdata
->bytes
);
2459 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2460 io_parms
.offset
= rdata
->offset
;
2461 io_parms
.length
= rdata
->bytes
;
2462 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
2463 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
2464 io_parms
.pid
= rdata
->pid
;
2466 server
= io_parms
.tcon
->ses
->server
;
2468 rc
= smb2_new_read_req((void **) &buf
, &total_len
, &io_parms
, 0, 0);
2470 if (rc
== -EAGAIN
&& rdata
->credits
) {
2471 /* credits was reset by reconnect */
2473 /* reduce in_flight value since we won't send the req */
2474 spin_lock(&server
->req_lock
);
2475 server
->in_flight
--;
2476 spin_unlock(&server
->req_lock
);
2481 if (encryption_required(io_parms
.tcon
))
2482 flags
|= CIFS_TRANSFORM_REQ
;
2484 req_len
= cpu_to_be32(total_len
);
2486 rdata
->iov
[0].iov_base
= &req_len
;
2487 rdata
->iov
[0].iov_len
= sizeof(__be32
);
2488 rdata
->iov
[1].iov_base
= buf
;
2489 rdata
->iov
[1].iov_len
= total_len
;
2491 shdr
= (struct smb2_sync_hdr
*)buf
;
2493 if (rdata
->credits
) {
2494 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
2495 SMB2_MAX_BUFFER_SIZE
));
2496 shdr
->CreditRequest
= shdr
->CreditCharge
;
2497 spin_lock(&server
->req_lock
);
2498 server
->credits
+= rdata
->credits
-
2499 le16_to_cpu(shdr
->CreditCharge
);
2500 spin_unlock(&server
->req_lock
);
2501 wake_up(&server
->request_q
);
2502 flags
|= CIFS_HAS_CREDITS
;
2505 kref_get(&rdata
->refcount
);
2506 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
2507 cifs_readv_receive
, smb2_readv_callback
,
2508 smb3_handle_read_data
, rdata
, flags
);
2510 kref_put(&rdata
->refcount
, cifs_readdata_release
);
2511 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
2514 cifs_small_buf_release(buf
);
2519 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2520 unsigned int *nbytes
, char **buf
, int *buf_type
)
2522 int resp_buftype
, rc
= -EACCES
;
2523 struct smb2_read_plain_req
*req
= NULL
;
2524 struct smb2_read_rsp
*rsp
= NULL
;
2525 struct smb2_sync_hdr
*shdr
;
2527 struct kvec rsp_iov
;
2528 unsigned int total_len
;
2530 struct smb_rqst rqst
= { .rq_iov
= iov
,
2532 int flags
= CIFS_LOG_ERROR
;
2533 struct cifs_ses
*ses
= io_parms
->tcon
->ses
;
2536 rc
= smb2_new_read_req((void **)&req
, &total_len
, io_parms
, 0, 0);
2540 if (encryption_required(io_parms
->tcon
))
2541 flags
|= CIFS_TRANSFORM_REQ
;
2543 req_len
= cpu_to_be32(total_len
);
2545 iov
[0].iov_base
= &req_len
;
2546 iov
[0].iov_len
= sizeof(__be32
);
2547 iov
[1].iov_base
= req
;
2548 iov
[1].iov_len
= total_len
;
2550 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2551 cifs_small_buf_release(req
);
2553 rsp
= (struct smb2_read_rsp
*)rsp_iov
.iov_base
;
2554 shdr
= get_sync_hdr(rsp
);
2556 if (shdr
->Status
== STATUS_END_OF_FILE
) {
2557 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2562 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
2563 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
2565 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2566 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
2567 (*nbytes
> io_parms
->length
)) {
2568 cifs_dbg(FYI
, "bad length %d for count %d\n",
2569 *nbytes
, io_parms
->length
);
2576 memcpy(*buf
, (char *)shdr
+ rsp
->DataOffset
, *nbytes
);
2577 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2578 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
2579 *buf
= rsp_iov
.iov_base
;
2580 if (resp_buftype
== CIFS_SMALL_BUFFER
)
2581 *buf_type
= CIFS_SMALL_BUFFER
;
2582 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
2583 *buf_type
= CIFS_LARGE_BUFFER
;
2589 * Check the mid_state and signature on received buffer (if any), and queue the
2590 * workqueue completion task.
2593 smb2_writev_callback(struct mid_q_entry
*mid
)
2595 struct cifs_writedata
*wdata
= mid
->callback_data
;
2596 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2597 unsigned int written
;
2598 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
2599 unsigned int credits_received
= 1;
2601 switch (mid
->mid_state
) {
2602 case MID_RESPONSE_RECEIVED
:
2603 credits_received
= le16_to_cpu(rsp
->hdr
.sync_hdr
.CreditRequest
);
2604 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
2605 if (wdata
->result
!= 0)
2608 written
= le32_to_cpu(rsp
->DataLength
);
2610 * Mask off high 16 bits when bytes written as returned
2611 * by the server is greater than bytes requested by the
2612 * client. OS/2 servers are known to set incorrect
2615 if (written
> wdata
->bytes
)
2618 if (written
< wdata
->bytes
)
2619 wdata
->result
= -ENOSPC
;
2621 wdata
->bytes
= written
;
2623 case MID_REQUEST_SUBMITTED
:
2624 case MID_RETRY_NEEDED
:
2625 wdata
->result
= -EAGAIN
;
2628 wdata
->result
= -EIO
;
2633 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2635 queue_work(cifsiod_wq
, &wdata
->work
);
2636 DeleteMidQEntry(mid
);
2637 add_credits(tcon
->ses
->server
, credits_received
, 0);
2640 /* smb2_async_writev - send an async write, and set up mid to handle result */
2642 smb2_async_writev(struct cifs_writedata
*wdata
,
2643 void (*release
)(struct kref
*kref
))
2645 int rc
= -EACCES
, flags
= 0;
2646 struct smb2_write_req
*req
= NULL
;
2647 struct smb2_sync_hdr
*shdr
;
2648 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2649 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2651 struct smb_rqst rqst
= { };
2653 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
2655 if (rc
== -EAGAIN
&& wdata
->credits
) {
2656 /* credits was reset by reconnect */
2658 /* reduce in_flight value since we won't send the req */
2659 spin_lock(&server
->req_lock
);
2660 server
->in_flight
--;
2661 spin_unlock(&server
->req_lock
);
2663 goto async_writev_out
;
2666 if (encryption_required(tcon
))
2667 flags
|= CIFS_TRANSFORM_REQ
;
2669 shdr
= get_sync_hdr(req
);
2670 shdr
->ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
2672 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
2673 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
2674 req
->WriteChannelInfoOffset
= 0;
2675 req
->WriteChannelInfoLength
= 0;
2677 req
->Offset
= cpu_to_le64(wdata
->offset
);
2678 /* 4 for rfc1002 length field */
2679 req
->DataOffset
= cpu_to_le16(
2680 offsetof(struct smb2_write_req
, Buffer
) - 4);
2681 req
->RemainingBytes
= 0;
2683 /* 4 for rfc1002 length field and 1 for Buffer */
2685 iov
[0].iov_base
= req
;
2686 iov
[1].iov_len
= get_rfc1002_length(req
) - 1;
2687 iov
[1].iov_base
= (char *)req
+ 4;
2691 rqst
.rq_pages
= wdata
->pages
;
2692 rqst
.rq_npages
= wdata
->nr_pages
;
2693 rqst
.rq_pagesz
= wdata
->pagesz
;
2694 rqst
.rq_tailsz
= wdata
->tailsz
;
2696 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
2697 wdata
->offset
, wdata
->bytes
);
2699 req
->Length
= cpu_to_le32(wdata
->bytes
);
2701 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
2703 if (wdata
->credits
) {
2704 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
2705 SMB2_MAX_BUFFER_SIZE
));
2706 shdr
->CreditRequest
= shdr
->CreditCharge
;
2707 spin_lock(&server
->req_lock
);
2708 server
->credits
+= wdata
->credits
-
2709 le16_to_cpu(shdr
->CreditCharge
);
2710 spin_unlock(&server
->req_lock
);
2711 wake_up(&server
->request_q
);
2712 flags
|= CIFS_HAS_CREDITS
;
2715 kref_get(&wdata
->refcount
);
2716 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, NULL
,
2720 kref_put(&wdata
->refcount
, release
);
2721 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2725 cifs_small_buf_release(req
);
2730 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2731 * The length field from io_parms must be at least 1 and indicates a number of
2732 * elements with data to write that begins with position 1 in iov array. All
2733 * data length is specified by count.
2736 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2737 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
2740 struct smb2_write_req
*req
= NULL
;
2741 struct smb2_write_rsp
*rsp
= NULL
;
2743 struct kvec rsp_iov
;
2751 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
2755 if (io_parms
->tcon
->ses
->server
== NULL
)
2756 return -ECONNABORTED
;
2758 if (encryption_required(io_parms
->tcon
))
2759 flags
|= CIFS_TRANSFORM_REQ
;
2761 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
2763 req
->PersistentFileId
= io_parms
->persistent_fid
;
2764 req
->VolatileFileId
= io_parms
->volatile_fid
;
2765 req
->WriteChannelInfoOffset
= 0;
2766 req
->WriteChannelInfoLength
= 0;
2768 req
->Length
= cpu_to_le32(io_parms
->length
);
2769 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2770 /* 4 for rfc1002 length field */
2771 req
->DataOffset
= cpu_to_le16(
2772 offsetof(struct smb2_write_req
, Buffer
) - 4);
2773 req
->RemainingBytes
= 0;
2775 iov
[0].iov_base
= (char *)req
;
2776 /* 4 for rfc1002 length field and 1 for Buffer */
2777 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2779 /* length of entire message including data to be written */
2780 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
2782 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
2783 &resp_buftype
, flags
, &rsp_iov
);
2784 cifs_small_buf_release(req
);
2785 rsp
= (struct smb2_write_rsp
*)rsp_iov
.iov_base
;
2788 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
2789 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
2791 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2793 free_rsp_buf(resp_buftype
, rsp
);
2798 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
2801 unsigned int entrycount
= 0;
2802 unsigned int next_offset
= 0;
2803 FILE_DIRECTORY_INFO
*entryptr
;
2805 if (bufstart
== NULL
)
2808 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
2811 entryptr
= (FILE_DIRECTORY_INFO
*)
2812 ((char *)entryptr
+ next_offset
);
2814 if ((char *)entryptr
+ size
> end_of_buf
) {
2815 cifs_dbg(VFS
, "malformed search entry would overflow\n");
2819 len
= le32_to_cpu(entryptr
->FileNameLength
);
2820 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
2821 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
2826 *lastentry
= (char *)entryptr
;
2829 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
2841 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
2842 u64 persistent_fid
, u64 volatile_fid
, int index
,
2843 struct cifs_search_info
*srch_inf
)
2845 struct smb2_query_directory_req
*req
;
2846 struct smb2_query_directory_rsp
*rsp
= NULL
;
2848 struct kvec rsp_iov
;
2851 int resp_buftype
= CIFS_NO_BUFFER
;
2852 unsigned char *bufptr
;
2853 struct TCP_Server_Info
*server
;
2854 struct cifs_ses
*ses
= tcon
->ses
;
2855 __le16 asteriks
= cpu_to_le16('*');
2857 unsigned int output_size
= CIFSMaxBufSize
;
2858 size_t info_buf_size
;
2861 if (ses
&& (ses
->server
))
2862 server
= ses
->server
;
2866 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
2870 if (encryption_required(tcon
))
2871 flags
|= CIFS_TRANSFORM_REQ
;
2873 switch (srch_inf
->info_level
) {
2874 case SMB_FIND_FILE_DIRECTORY_INFO
:
2875 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
2876 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
2878 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
2879 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
2880 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
2883 cifs_dbg(VFS
, "info level %u isn't supported\n",
2884 srch_inf
->info_level
);
2889 req
->FileIndex
= cpu_to_le32(index
);
2890 req
->PersistentFileId
= persistent_fid
;
2891 req
->VolatileFileId
= volatile_fid
;
2894 bufptr
= req
->Buffer
;
2895 memcpy(bufptr
, &asteriks
, len
);
2897 req
->FileNameOffset
=
2898 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
2899 req
->FileNameLength
= cpu_to_le16(len
);
2901 * BB could be 30 bytes or so longer if we used SMB2 specific
2902 * buffer lengths, but this is safe and close enough.
2904 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
2905 output_size
= min_t(unsigned int, output_size
, 2 << 15);
2906 req
->OutputBufferLength
= cpu_to_le32(output_size
);
2908 iov
[0].iov_base
= (char *)req
;
2909 /* 4 for RFC1001 length and 1 for Buffer */
2910 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2912 iov
[1].iov_base
= (char *)(req
->Buffer
);
2913 iov
[1].iov_len
= len
;
2915 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
2917 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, flags
, &rsp_iov
);
2918 cifs_small_buf_release(req
);
2919 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
.iov_base
;
2922 if (rc
== -ENODATA
&&
2923 rsp
->hdr
.sync_hdr
.Status
== STATUS_NO_MORE_FILES
) {
2924 srch_inf
->endOfSearch
= true;
2927 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
2931 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2932 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2937 srch_inf
->unicode
= true;
2939 if (srch_inf
->ntwrk_buf_start
) {
2940 if (srch_inf
->smallBuf
)
2941 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
2943 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
2945 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
2946 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
2947 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
2948 /* 4 for rfc1002 length field */
2949 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
2950 srch_inf
->entries_in_buffer
=
2951 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
2952 &srch_inf
->last_entry
, info_buf_size
);
2953 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
2954 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
2955 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
2956 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
2957 if (resp_buftype
== CIFS_LARGE_BUFFER
)
2958 srch_inf
->smallBuf
= false;
2959 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
2960 srch_inf
->smallBuf
= true;
2962 cifs_dbg(VFS
, "illegal search buffer type\n");
2967 free_rsp_buf(resp_buftype
, rsp
);
2972 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2973 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
2974 unsigned int num
, void **data
, unsigned int *size
)
2976 struct smb2_set_info_req
*req
;
2977 struct smb2_set_info_rsp
*rsp
= NULL
;
2979 struct kvec rsp_iov
;
2983 struct TCP_Server_Info
*server
;
2984 struct cifs_ses
*ses
= tcon
->ses
;
2987 if (ses
&& (ses
->server
))
2988 server
= ses
->server
;
2995 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
2999 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
3005 if (encryption_required(tcon
))
3006 flags
|= CIFS_TRANSFORM_REQ
;
3008 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3010 req
->InfoType
= SMB2_O_INFO_FILE
;
3011 req
->FileInfoClass
= info_class
;
3012 req
->PersistentFileId
= persistent_fid
;
3013 req
->VolatileFileId
= volatile_fid
;
3015 /* 4 for RFC1001 length and 1 for Buffer */
3017 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
3018 req
->BufferLength
= cpu_to_le32(*size
);
3020 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
3022 memcpy(req
->Buffer
, *data
, *size
);
3024 iov
[0].iov_base
= (char *)req
;
3025 /* 4 for RFC1001 length */
3026 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
3028 for (i
= 1; i
< num
; i
++) {
3029 inc_rfc1001_len(req
, size
[i
]);
3030 le32_add_cpu(&req
->BufferLength
, size
[i
]);
3031 iov
[i
].iov_base
= (char *)data
[i
];
3032 iov
[i
].iov_len
= size
[i
];
3035 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, flags
, &rsp_iov
);
3036 cifs_small_buf_release(req
);
3037 rsp
= (struct smb2_set_info_rsp
*)rsp_iov
.iov_base
;
3040 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
3042 free_rsp_buf(resp_buftype
, rsp
);
3048 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
3049 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3051 struct smb2_file_rename_info info
;
3053 unsigned int size
[2];
3055 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3057 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
3061 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
3062 /* 0 = fail if target already exists */
3063 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3064 info
.FileNameLength
= cpu_to_le32(len
);
3067 size
[0] = sizeof(struct smb2_file_rename_info
);
3069 data
[1] = target_file
;
3070 size
[1] = len
+ 2 /* null */;
3072 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3073 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
3080 SMB2_rmdir(const unsigned int xid
, struct cifs_tcon
*tcon
,
3081 u64 persistent_fid
, u64 volatile_fid
)
3083 __u8 delete_pending
= 1;
3087 data
= &delete_pending
;
3088 size
= 1; /* sizeof __u8 */
3090 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3091 current
->tgid
, FILE_DISPOSITION_INFORMATION
, 1, &data
,
3096 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
3097 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3099 struct smb2_file_link_info info
;
3101 unsigned int size
[2];
3103 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3105 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
3109 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
3110 /* 0 = fail if link already exists */
3111 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3112 info
.FileNameLength
= cpu_to_le32(len
);
3115 size
[0] = sizeof(struct smb2_file_link_info
);
3117 data
[1] = target_file
;
3118 size
[1] = len
+ 2 /* null */;
3120 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3121 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
3127 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3128 u64 volatile_fid
, u32 pid
, __le64
*eof
, bool is_falloc
)
3130 struct smb2_file_eof_info info
;
3134 info
.EndOfFile
= *eof
;
3137 size
= sizeof(struct smb2_file_eof_info
);
3140 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3141 pid
, FILE_ALLOCATION_INFORMATION
, 1, &data
, &size
);
3143 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3144 pid
, FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
3148 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3149 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
3152 size
= sizeof(FILE_BASIC_INFO
);
3153 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3154 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
3155 (void **)&buf
, &size
);
3159 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3160 const u64 persistent_fid
, const u64 volatile_fid
,
3164 struct smb2_oplock_break
*req
= NULL
;
3165 int flags
= CIFS_OBREAK_OP
;
3167 cifs_dbg(FYI
, "SMB2_oplock_break\n");
3168 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
3172 if (encryption_required(tcon
))
3173 flags
|= CIFS_TRANSFORM_REQ
;
3175 req
->VolatileFid
= volatile_fid
;
3176 req
->PersistentFid
= persistent_fid
;
3177 req
->OplockLevel
= oplock_level
;
3178 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
3180 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, flags
);
3181 cifs_small_buf_release(req
);
3184 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3185 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
3192 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
3193 struct kstatfs
*kst
)
3195 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
3196 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
3197 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
3198 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
3199 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
3204 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
3205 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
3208 struct smb2_query_info_req
*req
;
3210 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
3212 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
3215 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
3219 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
3220 req
->FileInfoClass
= level
;
3221 req
->PersistentFileId
= persistent_fid
;
3222 req
->VolatileFileId
= volatile_fid
;
3223 /* 4 for rfc1002 length field and 1 for pad */
3224 req
->InputBufferOffset
=
3225 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
3226 req
->OutputBufferLength
= cpu_to_le32(
3227 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
3229 iov
->iov_base
= (char *)req
;
3230 /* 4 for rfc1002 length field */
3231 iov
->iov_len
= get_rfc1002_length(req
) + 4;
3236 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3237 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
3239 struct smb2_query_info_rsp
*rsp
= NULL
;
3241 struct kvec rsp_iov
;
3244 struct cifs_ses
*ses
= tcon
->ses
;
3245 struct smb2_fs_full_size_info
*info
= NULL
;
3248 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
3249 sizeof(struct smb2_fs_full_size_info
),
3250 persistent_fid
, volatile_fid
);
3254 if (encryption_required(tcon
))
3255 flags
|= CIFS_TRANSFORM_REQ
;
3257 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
3258 cifs_small_buf_release(iov
.iov_base
);
3260 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3263 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3265 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
3266 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
3267 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
3268 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
3269 sizeof(struct smb2_fs_full_size_info
));
3271 copy_fs_info_to_kstatfs(info
, fsdata
);
3274 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3279 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
3280 u64 persistent_fid
, u64 volatile_fid
, int level
)
3282 struct smb2_query_info_rsp
*rsp
= NULL
;
3284 struct kvec rsp_iov
;
3286 int resp_buftype
, max_len
, min_len
;
3287 struct cifs_ses
*ses
= tcon
->ses
;
3288 unsigned int rsp_len
, offset
;
3291 if (level
== FS_DEVICE_INFORMATION
) {
3292 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3293 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3294 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
3295 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
3296 min_len
= MIN_FS_ATTR_INFO_SIZE
;
3297 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3298 max_len
= sizeof(struct smb3_fs_ss_info
);
3299 min_len
= sizeof(struct smb3_fs_ss_info
);
3301 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
3305 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
3306 persistent_fid
, volatile_fid
);
3310 if (encryption_required(tcon
))
3311 flags
|= CIFS_TRANSFORM_REQ
;
3313 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
3314 cifs_small_buf_release(iov
.iov_base
);
3316 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3319 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3321 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
3322 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
3323 rc
= validate_buf(offset
, rsp_len
, &rsp
->hdr
, min_len
);
3327 if (level
== FS_ATTRIBUTE_INFORMATION
)
3328 memcpy(&tcon
->fsAttrInfo
, 4 /* RFC1001 len */ + offset
3329 + (char *)&rsp
->hdr
, min_t(unsigned int,
3331 else if (level
== FS_DEVICE_INFORMATION
)
3332 memcpy(&tcon
->fsDevInfo
, 4 /* RFC1001 len */ + offset
3333 + (char *)&rsp
->hdr
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
3334 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3335 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
3336 (4 /* RFC1001 len */ + offset
+ (char *)&rsp
->hdr
);
3337 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
3338 tcon
->perf_sector_size
=
3339 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
3343 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3348 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
3349 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3350 const __u32 num_lock
, struct smb2_lock_element
*buf
)
3353 struct smb2_lock_req
*req
= NULL
;
3355 struct kvec rsp_iov
;
3358 int flags
= CIFS_NO_RESP
;
3360 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
3362 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
3366 if (encryption_required(tcon
))
3367 flags
|= CIFS_TRANSFORM_REQ
;
3369 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3370 req
->LockCount
= cpu_to_le16(num_lock
);
3372 req
->PersistentFileId
= persist_fid
;
3373 req
->VolatileFileId
= volatile_fid
;
3375 count
= num_lock
* sizeof(struct smb2_lock_element
);
3376 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
3378 iov
[0].iov_base
= (char *)req
;
3379 /* 4 for rfc1002 length field and count for all locks */
3380 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
3381 iov
[1].iov_base
= (char *)buf
;
3382 iov
[1].iov_len
= count
;
3384 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
3385 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, flags
,
3387 cifs_small_buf_release(req
);
3389 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
3390 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
3397 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
3398 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3399 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
3402 struct smb2_lock_element lock
;
3404 lock
.Offset
= cpu_to_le64(offset
);
3405 lock
.Length
= cpu_to_le64(length
);
3406 lock
.Flags
= cpu_to_le32(lock_flags
);
3407 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
3408 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
3410 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
3414 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3415 __u8
*lease_key
, const __le32 lease_state
)
3418 struct smb2_lease_ack
*req
= NULL
;
3419 int flags
= CIFS_OBREAK_OP
;
3421 cifs_dbg(FYI
, "SMB2_lease_break\n");
3422 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
3426 if (encryption_required(tcon
))
3427 flags
|= CIFS_TRANSFORM_REQ
;
3429 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
3430 req
->StructureSize
= cpu_to_le16(36);
3431 inc_rfc1001_len(req
, 12);
3433 memcpy(req
->LeaseKey
, lease_key
, 16);
3434 req
->LeaseState
= lease_state
;
3436 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, flags
);
3437 cifs_small_buf_release(req
);
3440 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3441 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);