4 * Copyright (C) International Business Machines Corp., 2009, 2012
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"
51 * The following table defines the expected "StructureSize" of SMB2 requests
52 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
54 * Note that commands are defined in smb2pdu.h in le16 but the array below is
55 * indexed by command in host byte order.
57 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
58 /* SMB2_NEGOTIATE */ 36,
59 /* SMB2_SESSION_SETUP */ 25,
61 /* SMB2_TREE_CONNECT */ 9,
62 /* SMB2_TREE_DISCONNECT */ 4,
72 /* SMB2_QUERY_DIRECTORY */ 33,
73 /* SMB2_CHANGE_NOTIFY */ 32,
74 /* SMB2_QUERY_INFO */ 41,
75 /* SMB2_SET_INFO */ 33,
76 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
81 smb2_hdr_assemble(struct smb2_hdr
*hdr
, __le16 smb2_cmd
/* command */ ,
82 const struct cifs_tcon
*tcon
)
84 struct smb2_pdu
*pdu
= (struct smb2_pdu
*)hdr
;
85 char *temp
= (char *)hdr
;
86 /* lookup word count ie StructureSize from table */
87 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_cmd
)];
90 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
91 * largest operations (Create)
95 /* Note this is only network field converted to big endian */
96 hdr
->smb2_buf_length
= cpu_to_be32(parmsize
+ sizeof(struct smb2_hdr
)
97 - 4 /* RFC 1001 length field itself not counted */);
99 hdr
->ProtocolId
[0] = 0xFE;
100 hdr
->ProtocolId
[1] = 'S';
101 hdr
->ProtocolId
[2] = 'M';
102 hdr
->ProtocolId
[3] = 'B';
103 hdr
->StructureSize
= cpu_to_le16(64);
104 hdr
->Command
= smb2_cmd
;
105 hdr
->CreditRequest
= cpu_to_le16(2); /* BB make this dynamic */
106 hdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
111 hdr
->TreeId
= tcon
->tid
;
112 /* Uid is not converted */
114 hdr
->SessionId
= tcon
->ses
->Suid
;
115 /* BB check following DFS flags BB */
116 /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */
117 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
)
118 hdr
->Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
119 /* BB how does SMB2 do case sensitive? */
121 hdr->Flags |= SMBFLG_CASELESS; */
122 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
)
123 hdr
->Flags
|= SMB2_FLAGS_SIGNED
;
125 pdu
->StructureSize2
= cpu_to_le16(parmsize
);
130 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
133 struct nls_table
*nls_codepage
;
134 struct cifs_ses
*ses
;
135 struct TCP_Server_Info
*server
;
138 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
139 * check for tcp and smb session status done differently
140 * for those three - in the calling routine.
145 if (smb2_command
== SMB2_TREE_CONNECT
)
148 if (tcon
->tidStatus
== CifsExiting
) {
150 * only tree disconnect, open, and write,
151 * (and ulogoff which does not have tcon)
152 * are allowed as we start force umount.
154 if ((smb2_command
!= SMB2_WRITE
) &&
155 (smb2_command
!= SMB2_CREATE
) &&
156 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
157 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
162 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
163 (!tcon
->ses
->server
))
167 server
= ses
->server
;
170 * Give demultiplex thread up to 10 seconds to reconnect, should be
171 * greater than cifs socket timeout which is 7 seconds
173 while (server
->tcpStatus
== CifsNeedReconnect
) {
175 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
176 * here since they are implicitly done when session drops.
178 switch (smb2_command
) {
180 * BB Should we keep oplock break and add flush to exceptions?
182 case SMB2_TREE_DISCONNECT
:
185 case SMB2_OPLOCK_BREAK
:
189 wait_event_interruptible_timeout(server
->response_q
,
190 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
192 /* are we still trying to reconnect? */
193 if (server
->tcpStatus
!= CifsNeedReconnect
)
197 * on "soft" mounts we wait once. Hard mounts keep
198 * retrying until process is killed or server comes
202 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
207 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
210 nls_codepage
= load_nls_default();
213 * need to prevent multiple threads trying to simultaneously reconnect
214 * the same SMB session
216 mutex_lock(&tcon
->ses
->session_mutex
);
217 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
218 if (!rc
&& tcon
->ses
->need_reconnect
)
219 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
221 if (rc
|| !tcon
->need_reconnect
) {
222 mutex_unlock(&tcon
->ses
->session_mutex
);
226 cifs_mark_open_files_invalid(tcon
);
227 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
228 mutex_unlock(&tcon
->ses
->session_mutex
);
229 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
232 atomic_inc(&tconInfoReconnectCount
);
234 * BB FIXME add code to check if wsize needs update due to negotiated
235 * smb buffer size shrinking.
239 * Check if handle based operation so we know whether we can continue
240 * or not without returning to caller to reset file handle.
243 * BB Is flush done by server on drop of tcp session? Should we special
244 * case it and skip above?
246 switch (smb2_command
) {
252 case SMB2_QUERY_DIRECTORY
:
253 case SMB2_CHANGE_NOTIFY
:
254 case SMB2_QUERY_INFO
:
258 unload_nls(nls_codepage
);
263 * Allocate and return pointer to an SMB request hdr, and set basic
264 * SMB information in the SMB header. If the return code is zero, this
265 * function must have filled in request_buf pointer.
268 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
273 rc
= smb2_reconnect(smb2_command
, tcon
);
277 /* BB eventually switch this to SMB2 specific small buf size */
278 *request_buf
= cifs_small_buf_get();
279 if (*request_buf
== NULL
) {
280 /* BB should we add a retry in here if not a writepage? */
284 smb2_hdr_assemble((struct smb2_hdr
*) *request_buf
, smb2_command
, tcon
);
287 #ifdef CONFIG_CIFS_STATS2
288 uint16_t com_code
= le16_to_cpu(smb2_command
);
289 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
291 cifs_stats_inc(&tcon
->num_smbs_sent
);
298 free_rsp_buf(int resp_buftype
, void *rsp
)
300 if (resp_buftype
== CIFS_SMALL_BUFFER
)
301 cifs_small_buf_release(rsp
);
302 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
303 cifs_buf_release(rsp
);
309 * SMB2 Worker functions follow:
311 * The general structure of the worker functions is:
312 * 1) Call smb2_init (assembles SMB2 header)
313 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
314 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
315 * 4) Decode SMB2 command specific fields in the fixed length area
316 * 5) Decode variable length data area (if any for this SMB2 command type)
317 * 6) Call free smb buffer
323 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
325 struct smb2_negotiate_req
*req
;
326 struct smb2_negotiate_rsp
*rsp
;
330 struct TCP_Server_Info
*server
= ses
->server
;
331 int blob_offset
, blob_length
;
333 int flags
= CIFS_NEG_OP
;
335 cifs_dbg(FYI
, "Negotiate protocol\n");
338 WARN(1, "%s: server is NULL!\n", __func__
);
342 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
346 req
->hdr
.SessionId
= 0;
348 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
350 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
351 inc_rfc1001_len(req
, 2);
353 /* only one of SMB2 signing flags may be set in SMB2 request */
355 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
356 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
357 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
359 req
->SecurityMode
= 0;
361 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
363 memcpy(req
->ClientGUID
, cifs_client_guid
, SMB2_CLIENT_GUID_SIZE
);
365 iov
[0].iov_base
= (char *)req
;
366 /* 4 for rfc1002 length field */
367 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
369 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
);
371 rsp
= (struct smb2_negotiate_rsp
*)iov
[0].iov_base
;
373 * No tcon so can't do
374 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
379 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
381 /* BB we may eventually want to match the negotiated vs. requested
382 dialect, even though we are only requesting one at a time */
383 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
384 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
385 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
386 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
387 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
388 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
389 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
390 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
392 cifs_dbg(VFS
, "Illegal dialect returned by server %d\n",
393 le16_to_cpu(rsp
->DialectRevision
));
397 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
399 /* SMB2 only has an extended negflavor */
400 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
401 server
->maxBuf
= le32_to_cpu(rsp
->MaxTransactSize
);
402 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
403 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
404 /* BB Do we need to validate the SecurityMode? */
405 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
406 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
408 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
410 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
412 if (blob_length
== 0) {
413 cifs_dbg(VFS
, "missing security blob on negprot\n");
418 rc
= cifs_enable_signing(server
, ses
->sign
);
419 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
423 rc
= decode_neg_token_init(security_blob
, blob_length
,
434 free_rsp_buf(resp_buftype
, rsp
);
439 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
440 const struct nls_table
*nls_cp
)
442 struct smb2_sess_setup_req
*req
;
443 struct smb2_sess_setup_rsp
*rsp
= NULL
;
447 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
448 struct TCP_Server_Info
*server
= ses
->server
;
451 char *ntlmssp_blob
= NULL
;
452 bool use_spnego
= false; /* else use raw ntlmssp */
454 cifs_dbg(FYI
, "Session Setup\n");
457 WARN(1, "%s: server is NULL!\n", __func__
);
462 * If memory allocation is successful, caller of this function
465 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
469 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
470 ses
->sectype
= RawNTLMSSP
;
472 ssetup_ntlmssp_authenticate
:
473 if (phase
== NtLmChallenge
)
474 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
476 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
480 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
481 req
->VcNumber
= 0; /* MBZ */
482 /* to enable echos and oplocks */
483 req
->hdr
.CreditRequest
= cpu_to_le16(3);
485 /* only one of SMB2 signing flags may be set in SMB2 request */
487 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
488 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
489 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
491 req
->SecurityMode
= 0;
493 req
->Capabilities
= 0;
494 req
->Channel
= 0; /* MBZ */
496 iov
[0].iov_base
= (char *)req
;
497 /* 4 for rfc1002 length field and 1 for pad */
498 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
499 if (phase
== NtLmNegotiate
) {
500 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
502 if (ntlmssp_blob
== NULL
) {
506 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
508 /* blob_length = build_spnego_ntlmssp_blob(
510 sizeof(struct _NEGOTIATE_MESSAGE),
512 /* BB eventually need to add this */
513 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
518 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
519 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
520 security_blob
= ntlmssp_blob
;
522 } else if (phase
== NtLmAuthenticate
) {
523 req
->hdr
.SessionId
= ses
->Suid
;
524 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
526 if (ntlmssp_blob
== NULL
) {
530 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
533 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n",
535 goto ssetup_exit
; /* BB double check error handling */
538 /* blob_length = build_spnego_ntlmssp_blob(
542 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
547 security_blob
= ntlmssp_blob
;
550 cifs_dbg(VFS
, "illegal ntlmssp phase\n");
555 /* Testing shows that buffer offset must be at location of Buffer[0] */
556 req
->SecurityBufferOffset
=
557 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
558 1 /* pad */ - 4 /* rfc1001 len */);
559 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
560 iov
[1].iov_base
= security_blob
;
561 iov
[1].iov_len
= blob_length
;
563 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
565 /* BB add code to build os and lm fields */
567 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
,
568 CIFS_LOG_ERROR
| CIFS_NEG_OP
);
570 kfree(security_blob
);
571 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
572 if (resp_buftype
!= CIFS_NO_BUFFER
&&
573 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
574 if (phase
!= NtLmNegotiate
) {
575 cifs_dbg(VFS
, "Unexpected more processing error\n");
578 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
579 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
580 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
581 le16_to_cpu(rsp
->SecurityBufferOffset
));
586 /* NTLMSSP Negotiate sent now processing challenge (response) */
587 phase
= NtLmChallenge
; /* process ntlmssp challenge */
588 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
589 ses
->Suid
= rsp
->hdr
.SessionId
;
590 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
591 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
595 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
596 * but at least the raw NTLMSSP case works.
599 * No tcon so can't do
600 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
605 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
607 free_rsp_buf(resp_buftype
, rsp
);
609 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
610 if ((phase
== NtLmChallenge
) && (rc
== 0))
611 goto ssetup_ntlmssp_authenticate
;
616 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
618 struct smb2_logoff_req
*req
; /* response is also trivial struct */
620 struct TCP_Server_Info
*server
;
622 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
624 if (ses
&& (ses
->server
))
625 server
= ses
->server
;
629 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
633 /* since no tcon, smb2_init can not do this, so do here */
634 req
->hdr
.SessionId
= ses
->Suid
;
636 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
638 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
640 * No tcon so can't do
641 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
646 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
648 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
651 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
654 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
655 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
657 struct smb2_tree_connect_req
*req
;
658 struct smb2_tree_connect_rsp
*rsp
= NULL
;
663 struct TCP_Server_Info
*server
;
664 __le16
*unc_path
= NULL
;
666 cifs_dbg(FYI
, "TCON\n");
668 if ((ses
->server
) && tree
)
669 server
= ses
->server
;
673 if (tcon
&& tcon
->bad_network_name
)
676 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
677 if (unc_path
== NULL
)
680 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
682 if (unc_path_len
< 2) {
687 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
694 /* since no tcon, smb2_init can not do this, so do here */
695 req
->hdr
.SessionId
= ses
->Suid
;
696 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
697 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
700 iov
[0].iov_base
= (char *)req
;
701 /* 4 for rfc1002 length field and 1 for pad */
702 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
704 /* Testing shows that buffer offset must be at location of Buffer[0] */
705 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
706 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
707 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
708 iov
[1].iov_base
= unc_path
;
709 iov
[1].iov_len
= unc_path_len
;
711 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
713 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
714 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
718 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
719 tcon
->need_reconnect
= true;
721 goto tcon_error_exit
;
725 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
729 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
730 cifs_dbg(FYI
, "connection to disk share\n");
731 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
733 cifs_dbg(FYI
, "connection to pipe share\n");
734 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
736 cifs_dbg(FYI
, "connection to printer\n");
738 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
740 goto tcon_error_exit
;
743 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
744 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
745 tcon
->tidStatus
= CifsGood
;
746 tcon
->need_reconnect
= false;
747 tcon
->tid
= rsp
->hdr
.TreeId
;
748 strncpy(tcon
->treeName
, tree
, MAX_TREE_SIZE
);
750 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
751 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
752 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
755 free_rsp_buf(resp_buftype
, rsp
);
760 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
761 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
762 tcon
->bad_network_name
= true;
768 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
770 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
772 struct TCP_Server_Info
*server
;
773 struct cifs_ses
*ses
= tcon
->ses
;
775 cifs_dbg(FYI
, "Tree Disconnect\n");
777 if (ses
&& (ses
->server
))
778 server
= ses
->server
;
782 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
785 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
789 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
791 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
796 static struct create_lease
*
797 create_lease_buf(u8
*lease_key
, u8 oplock
)
799 struct create_lease
*buf
;
801 buf
= kzalloc(sizeof(struct create_lease
), GFP_KERNEL
);
805 buf
->lcontext
.LeaseKeyLow
= cpu_to_le64(*((u64
*)lease_key
));
806 buf
->lcontext
.LeaseKeyHigh
= cpu_to_le64(*((u64
*)(lease_key
+ 8)));
807 if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
)
808 buf
->lcontext
.LeaseState
= SMB2_LEASE_WRITE_CACHING
|
809 SMB2_LEASE_READ_CACHING
;
810 else if (oplock
== SMB2_OPLOCK_LEVEL_II
)
811 buf
->lcontext
.LeaseState
= SMB2_LEASE_READ_CACHING
;
812 else if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
)
813 buf
->lcontext
.LeaseState
= SMB2_LEASE_HANDLE_CACHING
|
814 SMB2_LEASE_READ_CACHING
|
815 SMB2_LEASE_WRITE_CACHING
;
817 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
818 (struct create_lease
, lcontext
));
819 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context
));
820 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
821 (struct create_lease
, Name
));
822 buf
->ccontext
.NameLength
= cpu_to_le16(4);
831 parse_lease_state(struct smb2_create_rsp
*rsp
)
834 struct create_lease
*lc
;
837 data_offset
= (char *)rsp
;
838 data_offset
+= 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
839 lc
= (struct create_lease
*)data_offset
;
841 char *name
= le16_to_cpu(lc
->ccontext
.NameOffset
) + (char *)lc
;
842 if (le16_to_cpu(lc
->ccontext
.NameLength
) != 4 ||
843 strncmp(name
, "RqLs", 4)) {
844 lc
= (struct create_lease
*)((char *)lc
845 + le32_to_cpu(lc
->ccontext
.Next
));
848 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS
)
849 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
852 } while (le32_to_cpu(lc
->ccontext
.Next
) != 0);
857 return smb2_map_lease_to_oplock(lc
->lcontext
.LeaseState
);
861 SMB2_open(const unsigned int xid
, struct cifs_tcon
*tcon
, __le16
*path
,
862 u64
*persistent_fid
, u64
*volatile_fid
, __u32 desired_access
,
863 __u32 create_disposition
, __u32 file_attributes
, __u32 create_options
,
864 __u8
*oplock
, struct smb2_file_all_info
*buf
)
866 struct smb2_create_req
*req
;
867 struct smb2_create_rsp
*rsp
;
868 struct TCP_Server_Info
*server
;
869 struct cifs_ses
*ses
= tcon
->ses
;
873 __le16
*copy_path
= NULL
;
878 cifs_dbg(FYI
, "create/open\n");
880 if (ses
&& (ses
->server
))
881 server
= ses
->server
;
885 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
889 req
->ImpersonationLevel
= IL_IMPERSONATION
;
890 req
->DesiredAccess
= cpu_to_le32(desired_access
);
891 /* File attributes ignored on open (used in create though) */
892 req
->FileAttributes
= cpu_to_le32(file_attributes
);
893 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
894 req
->CreateDisposition
= cpu_to_le32(create_disposition
);
895 req
->CreateOptions
= cpu_to_le32(create_options
);
896 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
897 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
)
898 - 8 /* pad */ - 4 /* do not count rfc1001 len field */);
900 iov
[0].iov_base
= (char *)req
;
901 /* 4 for rfc1002 length field */
902 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
904 /* MUST set path len (NameLength) to 0 opening root of share */
905 if (uni_path_len
>= 4) {
906 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
907 /* -1 since last byte is buf[0] which is sent below (path) */
909 if (uni_path_len
% 8 != 0) {
910 copy_size
= uni_path_len
/ 8 * 8;
911 if (copy_size
< uni_path_len
)
914 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
917 memcpy((char *)copy_path
, (const char *)path
,
919 uni_path_len
= copy_size
;
923 iov
[1].iov_len
= uni_path_len
;
924 iov
[1].iov_base
= path
;
926 * -1 since last byte is buf[0] which was counted in
929 inc_rfc1001_len(req
, uni_path_len
- 1);
932 req
->hdr
.smb2_buf_length
= cpu_to_be32(be32_to_cpu(
933 req
->hdr
.smb2_buf_length
) + 8 - 1);
938 if (!server
->oplocks
)
939 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
941 if (!(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
942 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
943 req
->RequestedOplockLevel
= *oplock
;
945 iov
[num_iovecs
].iov_base
= create_lease_buf(oplock
+1, *oplock
);
946 if (iov
[num_iovecs
].iov_base
== NULL
) {
947 cifs_small_buf_release(req
);
951 iov
[num_iovecs
].iov_len
= sizeof(struct create_lease
);
952 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
953 req
->CreateContextsOffset
= cpu_to_le32(
954 sizeof(struct smb2_create_req
) - 4 - 8 +
955 iov
[num_iovecs
-1].iov_len
);
956 req
->CreateContextsLength
= cpu_to_le32(
957 sizeof(struct create_lease
));
958 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_lease
));
962 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
963 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
966 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
970 *persistent_fid
= rsp
->PersistentFileId
;
971 *volatile_fid
= rsp
->VolatileFileId
;
974 memcpy(buf
, &rsp
->CreationTime
, 32);
975 buf
->AllocationSize
= rsp
->AllocationSize
;
976 buf
->EndOfFile
= rsp
->EndofFile
;
977 buf
->Attributes
= rsp
->FileAttributes
;
978 buf
->NumberOfLinks
= cpu_to_le32(1);
979 buf
->DeletePending
= 0;
982 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
983 *oplock
= parse_lease_state(rsp
);
985 *oplock
= rsp
->OplockLevel
;
988 free_rsp_buf(resp_buftype
, rsp
);
993 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
994 u64 persistent_fid
, u64 volatile_fid
)
996 struct smb2_close_req
*req
;
997 struct smb2_close_rsp
*rsp
;
998 struct TCP_Server_Info
*server
;
999 struct cifs_ses
*ses
= tcon
->ses
;
1004 cifs_dbg(FYI
, "Close\n");
1006 if (ses
&& (ses
->server
))
1007 server
= ses
->server
;
1011 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1015 req
->PersistentFileId
= persistent_fid
;
1016 req
->VolatileFileId
= volatile_fid
;
1018 iov
[0].iov_base
= (char *)req
;
1019 /* 4 for rfc1002 length field */
1020 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1022 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1023 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1027 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1031 /* BB FIXME - decode close response, update inode for caching */
1034 free_rsp_buf(resp_buftype
, rsp
);
1039 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1040 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1043 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1044 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1045 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1046 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1049 if (buffer_length
< min_buf_size
) {
1050 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1051 buffer_length
, min_buf_size
);
1055 /* check if beyond RFC1001 maximum length */
1056 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1057 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1058 buffer_length
, smb_len
);
1062 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1063 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1071 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1072 * Caller must free buffer.
1075 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1076 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1080 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1086 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1090 memcpy(data
, begin_of_buf
, buffer_length
);
1096 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1097 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1098 size_t output_len
, size_t min_len
, void *data
)
1100 struct smb2_query_info_req
*req
;
1101 struct smb2_query_info_rsp
*rsp
= NULL
;
1105 struct TCP_Server_Info
*server
;
1106 struct cifs_ses
*ses
= tcon
->ses
;
1108 cifs_dbg(FYI
, "Query Info\n");
1110 if (ses
&& (ses
->server
))
1111 server
= ses
->server
;
1115 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1119 req
->InfoType
= SMB2_O_INFO_FILE
;
1120 req
->FileInfoClass
= info_class
;
1121 req
->PersistentFileId
= persistent_fid
;
1122 req
->VolatileFileId
= volatile_fid
;
1123 /* 4 for rfc1002 length field and 1 for Buffer */
1124 req
->InputBufferOffset
=
1125 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1126 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1128 iov
[0].iov_base
= (char *)req
;
1129 /* 4 for rfc1002 length field */
1130 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1132 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1133 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1136 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1140 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1141 le32_to_cpu(rsp
->OutputBufferLength
),
1142 &rsp
->hdr
, min_len
, data
);
1145 free_rsp_buf(resp_buftype
, rsp
);
1150 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1151 u64 persistent_fid
, u64 volatile_fid
,
1152 struct smb2_file_all_info
*data
)
1154 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1155 FILE_ALL_INFORMATION
,
1156 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1157 sizeof(struct smb2_file_all_info
), data
);
1161 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1162 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1164 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1165 FILE_INTERNAL_INFORMATION
,
1166 sizeof(struct smb2_file_internal_info
),
1167 sizeof(struct smb2_file_internal_info
), uniqueid
);
1171 * This is a no-op for now. We're not really interested in the reply, but
1172 * rather in the fact that the server sent one and that server->lstrp
1175 * FIXME: maybe we should consider checking that the reply matches request?
1178 smb2_echo_callback(struct mid_q_entry
*mid
)
1180 struct TCP_Server_Info
*server
= mid
->callback_data
;
1181 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1182 unsigned int credits_received
= 1;
1184 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1185 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1187 DeleteMidQEntry(mid
);
1188 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1192 SMB2_echo(struct TCP_Server_Info
*server
)
1194 struct smb2_echo_req
*req
;
1197 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1200 cifs_dbg(FYI
, "In echo request\n");
1202 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1206 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1208 iov
.iov_base
= (char *)req
;
1209 /* 4 for rfc1002 length field */
1210 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1212 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1215 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
1217 cifs_small_buf_release(req
);
1222 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1225 struct smb2_flush_req
*req
;
1226 struct TCP_Server_Info
*server
;
1227 struct cifs_ses
*ses
= tcon
->ses
;
1232 cifs_dbg(FYI
, "Flush\n");
1234 if (ses
&& (ses
->server
))
1235 server
= ses
->server
;
1239 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1243 req
->PersistentFileId
= persistent_fid
;
1244 req
->VolatileFileId
= volatile_fid
;
1246 iov
[0].iov_base
= (char *)req
;
1247 /* 4 for rfc1002 length field */
1248 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1250 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1252 if ((rc
!= 0) && tcon
)
1253 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1255 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1260 * To form a chain of read requests, any read requests after the first should
1261 * have the end_of_chain boolean set to true.
1264 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1265 unsigned int remaining_bytes
, int request_type
)
1268 struct smb2_read_req
*req
= NULL
;
1270 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1273 if (io_parms
->tcon
->ses
->server
== NULL
)
1274 return -ECONNABORTED
;
1276 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1278 req
->PersistentFileId
= io_parms
->persistent_fid
;
1279 req
->VolatileFileId
= io_parms
->volatile_fid
;
1280 req
->ReadChannelInfoOffset
= 0; /* reserved */
1281 req
->ReadChannelInfoLength
= 0; /* reserved */
1282 req
->Channel
= 0; /* reserved */
1283 req
->MinimumCount
= 0;
1284 req
->Length
= cpu_to_le32(io_parms
->length
);
1285 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1287 if (request_type
& CHAINED_REQUEST
) {
1288 if (!(request_type
& END_OF_CHAIN
)) {
1289 /* 4 for rfc1002 length field */
1290 req
->hdr
.NextCommand
=
1291 cpu_to_le32(get_rfc1002_length(req
) + 4);
1292 } else /* END_OF_CHAIN */
1293 req
->hdr
.NextCommand
= 0;
1294 if (request_type
& RELATED_REQUEST
) {
1295 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1297 * Related requests use info from previous read request
1300 req
->hdr
.SessionId
= 0xFFFFFFFF;
1301 req
->hdr
.TreeId
= 0xFFFFFFFF;
1302 req
->PersistentFileId
= 0xFFFFFFFF;
1303 req
->VolatileFileId
= 0xFFFFFFFF;
1306 if (remaining_bytes
> io_parms
->length
)
1307 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1309 req
->RemainingBytes
= 0;
1311 iov
[0].iov_base
= (char *)req
;
1312 /* 4 for rfc1002 length field */
1313 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1318 smb2_readv_callback(struct mid_q_entry
*mid
)
1320 struct cifs_readdata
*rdata
= mid
->callback_data
;
1321 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1322 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1323 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1324 unsigned int credits_received
= 1;
1325 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1327 .rq_pages
= rdata
->pages
,
1328 .rq_npages
= rdata
->nr_pages
,
1329 .rq_pagesz
= rdata
->pagesz
,
1330 .rq_tailsz
= rdata
->tailsz
};
1332 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1333 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
1336 switch (mid
->mid_state
) {
1337 case MID_RESPONSE_RECEIVED
:
1338 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1339 /* result already set, check signature */
1343 rc
= smb2_verify_signature(&rqst
, server
);
1345 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
1348 /* FIXME: should this be counted toward the initiating task? */
1349 task_io_account_read(rdata
->bytes
);
1350 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1352 case MID_REQUEST_SUBMITTED
:
1353 case MID_RETRY_NEEDED
:
1354 rdata
->result
= -EAGAIN
;
1357 if (rdata
->result
!= -ENODATA
)
1358 rdata
->result
= -EIO
;
1362 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1364 queue_work(cifsiod_wq
, &rdata
->work
);
1365 DeleteMidQEntry(mid
);
1366 add_credits(server
, credits_received
, 0);
1369 /* smb2_async_readv - send an async write, and set up mid to handle result */
1371 smb2_async_readv(struct cifs_readdata
*rdata
)
1374 struct smb2_hdr
*buf
;
1375 struct cifs_io_parms io_parms
;
1376 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1379 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
1380 __func__
, rdata
->offset
, rdata
->bytes
);
1382 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1383 io_parms
.offset
= rdata
->offset
;
1384 io_parms
.length
= rdata
->bytes
;
1385 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1386 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1387 io_parms
.pid
= rdata
->pid
;
1388 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1392 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1393 /* 4 for rfc1002 length field */
1394 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1396 kref_get(&rdata
->refcount
);
1397 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1398 cifs_readv_receive
, smb2_readv_callback
,
1401 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1402 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1405 cifs_small_buf_release(buf
);
1410 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1411 unsigned int *nbytes
, char **buf
, int *buf_type
)
1413 int resp_buftype
, rc
= -EACCES
;
1414 struct smb2_read_rsp
*rsp
= NULL
;
1418 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1422 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1423 &resp_buftype
, CIFS_LOG_ERROR
);
1425 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1427 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1428 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1433 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1434 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
1436 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1437 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1438 (*nbytes
> io_parms
->length
)) {
1439 cifs_dbg(FYI
, "bad length %d for count %d\n",
1440 *nbytes
, io_parms
->length
);
1447 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1449 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1450 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1451 *buf
= iov
[0].iov_base
;
1452 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1453 *buf_type
= CIFS_SMALL_BUFFER
;
1454 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1455 *buf_type
= CIFS_LARGE_BUFFER
;
1461 * Check the mid_state and signature on received buffer (if any), and queue the
1462 * workqueue completion task.
1465 smb2_writev_callback(struct mid_q_entry
*mid
)
1467 struct cifs_writedata
*wdata
= mid
->callback_data
;
1468 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1469 unsigned int written
;
1470 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1471 unsigned int credits_received
= 1;
1473 switch (mid
->mid_state
) {
1474 case MID_RESPONSE_RECEIVED
:
1475 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1476 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1477 if (wdata
->result
!= 0)
1480 written
= le32_to_cpu(rsp
->DataLength
);
1482 * Mask off high 16 bits when bytes written as returned
1483 * by the server is greater than bytes requested by the
1484 * client. OS/2 servers are known to set incorrect
1487 if (written
> wdata
->bytes
)
1490 if (written
< wdata
->bytes
)
1491 wdata
->result
= -ENOSPC
;
1493 wdata
->bytes
= written
;
1495 case MID_REQUEST_SUBMITTED
:
1496 case MID_RETRY_NEEDED
:
1497 wdata
->result
= -EAGAIN
;
1500 wdata
->result
= -EIO
;
1505 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1507 queue_work(cifsiod_wq
, &wdata
->work
);
1508 DeleteMidQEntry(mid
);
1509 add_credits(tcon
->ses
->server
, credits_received
, 0);
1512 /* smb2_async_writev - send an async write, and set up mid to handle result */
1514 smb2_async_writev(struct cifs_writedata
*wdata
)
1517 struct smb2_write_req
*req
= NULL
;
1518 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1520 struct smb_rqst rqst
;
1522 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1524 goto async_writev_out
;
1526 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1528 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1529 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1530 req
->WriteChannelInfoOffset
= 0;
1531 req
->WriteChannelInfoLength
= 0;
1533 req
->Offset
= cpu_to_le64(wdata
->offset
);
1534 /* 4 for rfc1002 length field */
1535 req
->DataOffset
= cpu_to_le16(
1536 offsetof(struct smb2_write_req
, Buffer
) - 4);
1537 req
->RemainingBytes
= 0;
1539 /* 4 for rfc1002 length field and 1 for Buffer */
1540 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1545 rqst
.rq_pages
= wdata
->pages
;
1546 rqst
.rq_npages
= wdata
->nr_pages
;
1547 rqst
.rq_pagesz
= wdata
->pagesz
;
1548 rqst
.rq_tailsz
= wdata
->tailsz
;
1550 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
1551 wdata
->offset
, wdata
->bytes
);
1553 req
->Length
= cpu_to_le32(wdata
->bytes
);
1555 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1557 kref_get(&wdata
->refcount
);
1558 rc
= cifs_call_async(tcon
->ses
->server
, &rqst
, NULL
,
1559 smb2_writev_callback
, wdata
, 0);
1562 kref_put(&wdata
->refcount
, cifs_writedata_release
);
1563 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1567 cifs_small_buf_release(req
);
1572 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1573 * The length field from io_parms must be at least 1 and indicates a number of
1574 * elements with data to write that begins with position 1 in iov array. All
1575 * data length is specified by count.
1578 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1579 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1582 struct smb2_write_req
*req
= NULL
;
1583 struct smb2_write_rsp
*rsp
= NULL
;
1590 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1594 if (io_parms
->tcon
->ses
->server
== NULL
)
1595 return -ECONNABORTED
;
1597 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1599 req
->PersistentFileId
= io_parms
->persistent_fid
;
1600 req
->VolatileFileId
= io_parms
->volatile_fid
;
1601 req
->WriteChannelInfoOffset
= 0;
1602 req
->WriteChannelInfoLength
= 0;
1604 req
->Length
= cpu_to_le32(io_parms
->length
);
1605 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1606 /* 4 for rfc1002 length field */
1607 req
->DataOffset
= cpu_to_le16(
1608 offsetof(struct smb2_write_req
, Buffer
) - 4);
1609 req
->RemainingBytes
= 0;
1611 iov
[0].iov_base
= (char *)req
;
1612 /* 4 for rfc1002 length field and 1 for Buffer */
1613 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1615 /* length of entire message including data to be written */
1616 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1618 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
1620 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
1623 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
1624 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
1626 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1628 free_rsp_buf(resp_buftype
, rsp
);
1633 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
1636 unsigned int entrycount
= 0;
1637 unsigned int next_offset
= 0;
1638 FILE_DIRECTORY_INFO
*entryptr
;
1640 if (bufstart
== NULL
)
1643 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
1646 entryptr
= (FILE_DIRECTORY_INFO
*)
1647 ((char *)entryptr
+ next_offset
);
1649 if ((char *)entryptr
+ size
> end_of_buf
) {
1650 cifs_dbg(VFS
, "malformed search entry would overflow\n");
1654 len
= le32_to_cpu(entryptr
->FileNameLength
);
1655 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
1656 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
1661 *lastentry
= (char *)entryptr
;
1664 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
1676 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
1677 u64 persistent_fid
, u64 volatile_fid
, int index
,
1678 struct cifs_search_info
*srch_inf
)
1680 struct smb2_query_directory_req
*req
;
1681 struct smb2_query_directory_rsp
*rsp
= NULL
;
1686 unsigned char *bufptr
;
1687 struct TCP_Server_Info
*server
;
1688 struct cifs_ses
*ses
= tcon
->ses
;
1689 __le16 asteriks
= cpu_to_le16('*');
1691 unsigned int output_size
= CIFSMaxBufSize
;
1692 size_t info_buf_size
;
1694 if (ses
&& (ses
->server
))
1695 server
= ses
->server
;
1699 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
1703 switch (srch_inf
->info_level
) {
1704 case SMB_FIND_FILE_DIRECTORY_INFO
:
1705 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
1706 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
1708 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
1709 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
1710 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
1713 cifs_dbg(VFS
, "info level %u isn't supported\n",
1714 srch_inf
->info_level
);
1719 req
->FileIndex
= cpu_to_le32(index
);
1720 req
->PersistentFileId
= persistent_fid
;
1721 req
->VolatileFileId
= volatile_fid
;
1724 bufptr
= req
->Buffer
;
1725 memcpy(bufptr
, &asteriks
, len
);
1727 req
->FileNameOffset
=
1728 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
1729 req
->FileNameLength
= cpu_to_le16(len
);
1731 * BB could be 30 bytes or so longer if we used SMB2 specific
1732 * buffer lengths, but this is safe and close enough.
1734 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
1735 output_size
= min_t(unsigned int, output_size
, 2 << 15);
1736 req
->OutputBufferLength
= cpu_to_le32(output_size
);
1738 iov
[0].iov_base
= (char *)req
;
1739 /* 4 for RFC1001 length and 1 for Buffer */
1740 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1742 iov
[1].iov_base
= (char *)(req
->Buffer
);
1743 iov
[1].iov_len
= len
;
1745 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
1747 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
1748 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
1751 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
1755 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1756 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
1761 srch_inf
->unicode
= true;
1763 if (srch_inf
->ntwrk_buf_start
) {
1764 if (srch_inf
->smallBuf
)
1765 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
1767 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
1769 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
1770 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
1771 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
1772 /* 4 for rfc1002 length field */
1773 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
1774 srch_inf
->entries_in_buffer
=
1775 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
1776 &srch_inf
->last_entry
, info_buf_size
);
1777 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
1778 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
1779 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
1780 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
1781 if (resp_buftype
== CIFS_LARGE_BUFFER
)
1782 srch_inf
->smallBuf
= false;
1783 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
1784 srch_inf
->smallBuf
= true;
1786 cifs_dbg(VFS
, "illegal search buffer type\n");
1788 if (rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
)
1789 srch_inf
->endOfSearch
= 1;
1791 srch_inf
->endOfSearch
= 0;
1796 free_rsp_buf(resp_buftype
, rsp
);
1801 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1802 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
1803 unsigned int num
, void **data
, unsigned int *size
)
1805 struct smb2_set_info_req
*req
;
1806 struct smb2_set_info_rsp
*rsp
= NULL
;
1811 struct TCP_Server_Info
*server
;
1812 struct cifs_ses
*ses
= tcon
->ses
;
1814 if (ses
&& (ses
->server
))
1815 server
= ses
->server
;
1822 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
1826 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
1832 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
1834 req
->InfoType
= SMB2_O_INFO_FILE
;
1835 req
->FileInfoClass
= info_class
;
1836 req
->PersistentFileId
= persistent_fid
;
1837 req
->VolatileFileId
= volatile_fid
;
1839 /* 4 for RFC1001 length and 1 for Buffer */
1841 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
1842 req
->BufferLength
= cpu_to_le32(*size
);
1844 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
1846 memcpy(req
->Buffer
, *data
, *size
);
1848 iov
[0].iov_base
= (char *)req
;
1849 /* 4 for RFC1001 length */
1850 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1852 for (i
= 1; i
< num
; i
++) {
1853 inc_rfc1001_len(req
, size
[i
]);
1854 le32_add_cpu(&req
->BufferLength
, size
[i
]);
1855 iov
[i
].iov_base
= (char *)data
[i
];
1856 iov
[i
].iov_len
= size
[i
];
1859 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
1860 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
1863 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
1867 free_rsp_buf(resp_buftype
, rsp
);
1873 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
1874 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
1876 struct smb2_file_rename_info info
;
1878 unsigned int size
[2];
1880 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
1882 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
1886 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
1887 /* 0 = fail if target already exists */
1888 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
1889 info
.FileNameLength
= cpu_to_le32(len
);
1892 size
[0] = sizeof(struct smb2_file_rename_info
);
1894 data
[1] = target_file
;
1895 size
[1] = len
+ 2 /* null */;
1897 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1898 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
1905 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
1906 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
1908 struct smb2_file_link_info info
;
1910 unsigned int size
[2];
1912 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
1914 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
1918 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
1919 /* 0 = fail if link already exists */
1920 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
1921 info
.FileNameLength
= cpu_to_le32(len
);
1924 size
[0] = sizeof(struct smb2_file_link_info
);
1926 data
[1] = target_file
;
1927 size
[1] = len
+ 2 /* null */;
1929 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1930 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
1936 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1937 u64 volatile_fid
, u32 pid
, __le64
*eof
)
1939 struct smb2_file_eof_info info
;
1943 info
.EndOfFile
= *eof
;
1946 size
= sizeof(struct smb2_file_eof_info
);
1948 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
1949 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
1953 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1954 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
1957 size
= sizeof(FILE_BASIC_INFO
);
1958 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1959 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
1960 (void **)&buf
, &size
);
1964 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
1965 const u64 persistent_fid
, const u64 volatile_fid
,
1969 struct smb2_oplock_break
*req
= NULL
;
1971 cifs_dbg(FYI
, "SMB2_oplock_break\n");
1972 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
1977 req
->VolatileFid
= volatile_fid
;
1978 req
->PersistentFid
= persistent_fid
;
1979 req
->OplockLevel
= oplock_level
;
1980 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1982 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
1983 /* SMB2 buffer freed by function above */
1986 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
1987 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
1994 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
1995 struct kstatfs
*kst
)
1997 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
1998 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
1999 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2000 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2001 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2006 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2007 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2010 struct smb2_query_info_req
*req
;
2012 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2014 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2017 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2021 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2022 req
->FileInfoClass
= level
;
2023 req
->PersistentFileId
= persistent_fid
;
2024 req
->VolatileFileId
= volatile_fid
;
2025 /* 4 for rfc1002 length field and 1 for pad */
2026 req
->InputBufferOffset
=
2027 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2028 req
->OutputBufferLength
= cpu_to_le32(
2029 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2031 iov
->iov_base
= (char *)req
;
2032 /* 4 for rfc1002 length field */
2033 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2038 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2039 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2041 struct smb2_query_info_rsp
*rsp
= NULL
;
2045 struct cifs_ses
*ses
= tcon
->ses
;
2046 struct smb2_fs_full_size_info
*info
= NULL
;
2048 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2049 sizeof(struct smb2_fs_full_size_info
),
2050 persistent_fid
, volatile_fid
);
2054 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2056 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2059 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2061 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2062 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2063 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2064 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2065 sizeof(struct smb2_fs_full_size_info
));
2067 copy_fs_info_to_kstatfs(info
, fsdata
);
2070 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2075 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2076 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2077 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2080 struct smb2_lock_req
*req
= NULL
;
2085 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2087 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2091 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2092 req
->LockCount
= cpu_to_le16(num_lock
);
2094 req
->PersistentFileId
= persist_fid
;
2095 req
->VolatileFileId
= volatile_fid
;
2097 count
= num_lock
* sizeof(struct smb2_lock_element
);
2098 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2100 iov
[0].iov_base
= (char *)req
;
2101 /* 4 for rfc1002 length field and count for all locks */
2102 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2103 iov
[1].iov_base
= (char *)buf
;
2104 iov
[1].iov_len
= count
;
2106 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2107 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2109 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2110 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2117 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2118 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2119 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2122 struct smb2_lock_element lock
;
2124 lock
.Offset
= cpu_to_le64(offset
);
2125 lock
.Length
= cpu_to_le64(length
);
2126 lock
.Flags
= cpu_to_le32(lock_flags
);
2127 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2128 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2130 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2134 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2135 __u8
*lease_key
, const __le32 lease_state
)
2138 struct smb2_lease_ack
*req
= NULL
;
2140 cifs_dbg(FYI
, "SMB2_lease_break\n");
2141 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2146 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2147 req
->StructureSize
= cpu_to_le16(36);
2148 inc_rfc1001_len(req
, 12);
2150 memcpy(req
->LeaseKey
, lease_key
, 16);
2151 req
->LeaseState
= lease_state
;
2153 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2154 /* SMB2 buffer freed by function above */
2157 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2158 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);