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
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
745 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
746 tcon
->tidStatus
= CifsGood
;
747 tcon
->need_reconnect
= false;
748 tcon
->tid
= rsp
->hdr
.TreeId
;
749 strncpy(tcon
->treeName
, tree
, MAX_TREE_SIZE
);
751 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
752 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
753 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
756 free_rsp_buf(resp_buftype
, rsp
);
761 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
762 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
763 tcon
->bad_network_name
= true;
769 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
771 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
773 struct TCP_Server_Info
*server
;
774 struct cifs_ses
*ses
= tcon
->ses
;
776 cifs_dbg(FYI
, "Tree Disconnect\n");
778 if (ses
&& (ses
->server
))
779 server
= ses
->server
;
783 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
786 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
790 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
792 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
797 static struct create_lease
*
798 create_lease_buf(u8
*lease_key
, u8 oplock
)
800 struct create_lease
*buf
;
802 buf
= kzalloc(sizeof(struct create_lease
), GFP_KERNEL
);
806 buf
->lcontext
.LeaseKeyLow
= cpu_to_le64(*((u64
*)lease_key
));
807 buf
->lcontext
.LeaseKeyHigh
= cpu_to_le64(*((u64
*)(lease_key
+ 8)));
808 if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
)
809 buf
->lcontext
.LeaseState
= SMB2_LEASE_WRITE_CACHING
|
810 SMB2_LEASE_READ_CACHING
;
811 else if (oplock
== SMB2_OPLOCK_LEVEL_II
)
812 buf
->lcontext
.LeaseState
= SMB2_LEASE_READ_CACHING
;
813 else if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
)
814 buf
->lcontext
.LeaseState
= SMB2_LEASE_HANDLE_CACHING
|
815 SMB2_LEASE_READ_CACHING
|
816 SMB2_LEASE_WRITE_CACHING
;
818 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
819 (struct create_lease
, lcontext
));
820 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context
));
821 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
822 (struct create_lease
, Name
));
823 buf
->ccontext
.NameLength
= cpu_to_le16(4);
832 parse_lease_state(struct smb2_create_rsp
*rsp
)
835 struct create_lease
*lc
;
838 data_offset
= (char *)rsp
;
839 data_offset
+= 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
840 lc
= (struct create_lease
*)data_offset
;
842 char *name
= le16_to_cpu(lc
->ccontext
.NameOffset
) + (char *)lc
;
843 if (le16_to_cpu(lc
->ccontext
.NameLength
) != 4 ||
844 strncmp(name
, "RqLs", 4)) {
845 lc
= (struct create_lease
*)((char *)lc
846 + le32_to_cpu(lc
->ccontext
.Next
));
849 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS
)
850 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
853 } while (le32_to_cpu(lc
->ccontext
.Next
) != 0);
858 return smb2_map_lease_to_oplock(lc
->lcontext
.LeaseState
);
862 SMB2_open(const unsigned int xid
, struct cifs_tcon
*tcon
, __le16
*path
,
863 u64
*persistent_fid
, u64
*volatile_fid
, __u32 desired_access
,
864 __u32 create_disposition
, __u32 file_attributes
, __u32 create_options
,
865 __u8
*oplock
, struct smb2_file_all_info
*buf
)
867 struct smb2_create_req
*req
;
868 struct smb2_create_rsp
*rsp
;
869 struct TCP_Server_Info
*server
;
870 struct cifs_ses
*ses
= tcon
->ses
;
874 __le16
*copy_path
= NULL
;
879 cifs_dbg(FYI
, "create/open\n");
881 if (ses
&& (ses
->server
))
882 server
= ses
->server
;
886 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
890 req
->ImpersonationLevel
= IL_IMPERSONATION
;
891 req
->DesiredAccess
= cpu_to_le32(desired_access
);
892 /* File attributes ignored on open (used in create though) */
893 req
->FileAttributes
= cpu_to_le32(file_attributes
);
894 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
895 req
->CreateDisposition
= cpu_to_le32(create_disposition
);
896 req
->CreateOptions
= cpu_to_le32(create_options
);
897 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
898 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
)
899 - 8 /* pad */ - 4 /* do not count rfc1001 len field */);
901 iov
[0].iov_base
= (char *)req
;
902 /* 4 for rfc1002 length field */
903 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
905 /* MUST set path len (NameLength) to 0 opening root of share */
906 if (uni_path_len
>= 4) {
907 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
908 /* -1 since last byte is buf[0] which is sent below (path) */
910 if (uni_path_len
% 8 != 0) {
911 copy_size
= uni_path_len
/ 8 * 8;
912 if (copy_size
< uni_path_len
)
915 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
918 memcpy((char *)copy_path
, (const char *)path
,
920 uni_path_len
= copy_size
;
924 iov
[1].iov_len
= uni_path_len
;
925 iov
[1].iov_base
= path
;
927 * -1 since last byte is buf[0] which was counted in
930 inc_rfc1001_len(req
, uni_path_len
- 1);
933 req
->hdr
.smb2_buf_length
= cpu_to_be32(be32_to_cpu(
934 req
->hdr
.smb2_buf_length
) + 8 - 1);
939 if (!server
->oplocks
)
940 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
942 if (!(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
943 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
944 req
->RequestedOplockLevel
= *oplock
;
946 iov
[num_iovecs
].iov_base
= create_lease_buf(oplock
+1, *oplock
);
947 if (iov
[num_iovecs
].iov_base
== NULL
) {
948 cifs_small_buf_release(req
);
952 iov
[num_iovecs
].iov_len
= sizeof(struct create_lease
);
953 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
954 req
->CreateContextsOffset
= cpu_to_le32(
955 sizeof(struct smb2_create_req
) - 4 - 8 +
956 iov
[num_iovecs
-1].iov_len
);
957 req
->CreateContextsLength
= cpu_to_le32(
958 sizeof(struct create_lease
));
959 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_lease
));
963 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
964 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
967 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
971 *persistent_fid
= rsp
->PersistentFileId
;
972 *volatile_fid
= rsp
->VolatileFileId
;
975 memcpy(buf
, &rsp
->CreationTime
, 32);
976 buf
->AllocationSize
= rsp
->AllocationSize
;
977 buf
->EndOfFile
= rsp
->EndofFile
;
978 buf
->Attributes
= rsp
->FileAttributes
;
979 buf
->NumberOfLinks
= cpu_to_le32(1);
980 buf
->DeletePending
= 0;
983 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
984 *oplock
= parse_lease_state(rsp
);
986 *oplock
= rsp
->OplockLevel
;
989 free_rsp_buf(resp_buftype
, rsp
);
994 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
995 u64 persistent_fid
, u64 volatile_fid
)
997 struct smb2_close_req
*req
;
998 struct smb2_close_rsp
*rsp
;
999 struct TCP_Server_Info
*server
;
1000 struct cifs_ses
*ses
= tcon
->ses
;
1005 cifs_dbg(FYI
, "Close\n");
1007 if (ses
&& (ses
->server
))
1008 server
= ses
->server
;
1012 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1016 req
->PersistentFileId
= persistent_fid
;
1017 req
->VolatileFileId
= volatile_fid
;
1019 iov
[0].iov_base
= (char *)req
;
1020 /* 4 for rfc1002 length field */
1021 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1023 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1024 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1028 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1032 /* BB FIXME - decode close response, update inode for caching */
1035 free_rsp_buf(resp_buftype
, rsp
);
1040 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1041 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1044 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1045 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1046 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1047 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1050 if (buffer_length
< min_buf_size
) {
1051 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1052 buffer_length
, min_buf_size
);
1056 /* check if beyond RFC1001 maximum length */
1057 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1058 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1059 buffer_length
, smb_len
);
1063 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1064 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1072 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1073 * Caller must free buffer.
1076 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1077 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1081 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1087 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1091 memcpy(data
, begin_of_buf
, buffer_length
);
1097 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1098 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1099 size_t output_len
, size_t min_len
, void *data
)
1101 struct smb2_query_info_req
*req
;
1102 struct smb2_query_info_rsp
*rsp
= NULL
;
1106 struct TCP_Server_Info
*server
;
1107 struct cifs_ses
*ses
= tcon
->ses
;
1109 cifs_dbg(FYI
, "Query Info\n");
1111 if (ses
&& (ses
->server
))
1112 server
= ses
->server
;
1116 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1120 req
->InfoType
= SMB2_O_INFO_FILE
;
1121 req
->FileInfoClass
= info_class
;
1122 req
->PersistentFileId
= persistent_fid
;
1123 req
->VolatileFileId
= volatile_fid
;
1124 /* 4 for rfc1002 length field and 1 for Buffer */
1125 req
->InputBufferOffset
=
1126 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1127 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1129 iov
[0].iov_base
= (char *)req
;
1130 /* 4 for rfc1002 length field */
1131 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1133 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1134 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1137 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1141 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1142 le32_to_cpu(rsp
->OutputBufferLength
),
1143 &rsp
->hdr
, min_len
, data
);
1146 free_rsp_buf(resp_buftype
, rsp
);
1151 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1152 u64 persistent_fid
, u64 volatile_fid
,
1153 struct smb2_file_all_info
*data
)
1155 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1156 FILE_ALL_INFORMATION
,
1157 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1158 sizeof(struct smb2_file_all_info
), data
);
1162 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1163 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1165 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1166 FILE_INTERNAL_INFORMATION
,
1167 sizeof(struct smb2_file_internal_info
),
1168 sizeof(struct smb2_file_internal_info
), uniqueid
);
1172 * This is a no-op for now. We're not really interested in the reply, but
1173 * rather in the fact that the server sent one and that server->lstrp
1176 * FIXME: maybe we should consider checking that the reply matches request?
1179 smb2_echo_callback(struct mid_q_entry
*mid
)
1181 struct TCP_Server_Info
*server
= mid
->callback_data
;
1182 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1183 unsigned int credits_received
= 1;
1185 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1186 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1188 DeleteMidQEntry(mid
);
1189 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1193 SMB2_echo(struct TCP_Server_Info
*server
)
1195 struct smb2_echo_req
*req
;
1198 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1201 cifs_dbg(FYI
, "In echo request\n");
1203 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1207 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1209 iov
.iov_base
= (char *)req
;
1210 /* 4 for rfc1002 length field */
1211 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1213 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1216 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
1218 cifs_small_buf_release(req
);
1223 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1226 struct smb2_flush_req
*req
;
1227 struct TCP_Server_Info
*server
;
1228 struct cifs_ses
*ses
= tcon
->ses
;
1233 cifs_dbg(FYI
, "Flush\n");
1235 if (ses
&& (ses
->server
))
1236 server
= ses
->server
;
1240 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1244 req
->PersistentFileId
= persistent_fid
;
1245 req
->VolatileFileId
= volatile_fid
;
1247 iov
[0].iov_base
= (char *)req
;
1248 /* 4 for rfc1002 length field */
1249 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1251 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1253 if ((rc
!= 0) && tcon
)
1254 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1256 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1261 * To form a chain of read requests, any read requests after the first should
1262 * have the end_of_chain boolean set to true.
1265 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1266 unsigned int remaining_bytes
, int request_type
)
1269 struct smb2_read_req
*req
= NULL
;
1271 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1274 if (io_parms
->tcon
->ses
->server
== NULL
)
1275 return -ECONNABORTED
;
1277 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1279 req
->PersistentFileId
= io_parms
->persistent_fid
;
1280 req
->VolatileFileId
= io_parms
->volatile_fid
;
1281 req
->ReadChannelInfoOffset
= 0; /* reserved */
1282 req
->ReadChannelInfoLength
= 0; /* reserved */
1283 req
->Channel
= 0; /* reserved */
1284 req
->MinimumCount
= 0;
1285 req
->Length
= cpu_to_le32(io_parms
->length
);
1286 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1288 if (request_type
& CHAINED_REQUEST
) {
1289 if (!(request_type
& END_OF_CHAIN
)) {
1290 /* 4 for rfc1002 length field */
1291 req
->hdr
.NextCommand
=
1292 cpu_to_le32(get_rfc1002_length(req
) + 4);
1293 } else /* END_OF_CHAIN */
1294 req
->hdr
.NextCommand
= 0;
1295 if (request_type
& RELATED_REQUEST
) {
1296 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1298 * Related requests use info from previous read request
1301 req
->hdr
.SessionId
= 0xFFFFFFFF;
1302 req
->hdr
.TreeId
= 0xFFFFFFFF;
1303 req
->PersistentFileId
= 0xFFFFFFFF;
1304 req
->VolatileFileId
= 0xFFFFFFFF;
1307 if (remaining_bytes
> io_parms
->length
)
1308 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1310 req
->RemainingBytes
= 0;
1312 iov
[0].iov_base
= (char *)req
;
1313 /* 4 for rfc1002 length field */
1314 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1319 smb2_readv_callback(struct mid_q_entry
*mid
)
1321 struct cifs_readdata
*rdata
= mid
->callback_data
;
1322 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1323 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1324 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1325 unsigned int credits_received
= 1;
1326 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1328 .rq_pages
= rdata
->pages
,
1329 .rq_npages
= rdata
->nr_pages
,
1330 .rq_pagesz
= rdata
->pagesz
,
1331 .rq_tailsz
= rdata
->tailsz
};
1333 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1334 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
1337 switch (mid
->mid_state
) {
1338 case MID_RESPONSE_RECEIVED
:
1339 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1340 /* result already set, check signature */
1344 rc
= smb2_verify_signature(&rqst
, server
);
1346 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
1349 /* FIXME: should this be counted toward the initiating task? */
1350 task_io_account_read(rdata
->bytes
);
1351 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1353 case MID_REQUEST_SUBMITTED
:
1354 case MID_RETRY_NEEDED
:
1355 rdata
->result
= -EAGAIN
;
1358 if (rdata
->result
!= -ENODATA
)
1359 rdata
->result
= -EIO
;
1363 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1365 queue_work(cifsiod_wq
, &rdata
->work
);
1366 DeleteMidQEntry(mid
);
1367 add_credits(server
, credits_received
, 0);
1370 /* smb2_async_readv - send an async write, and set up mid to handle result */
1372 smb2_async_readv(struct cifs_readdata
*rdata
)
1375 struct smb2_hdr
*buf
;
1376 struct cifs_io_parms io_parms
;
1377 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1380 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
1381 __func__
, rdata
->offset
, rdata
->bytes
);
1383 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1384 io_parms
.offset
= rdata
->offset
;
1385 io_parms
.length
= rdata
->bytes
;
1386 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1387 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1388 io_parms
.pid
= rdata
->pid
;
1389 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1393 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1394 /* 4 for rfc1002 length field */
1395 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1397 kref_get(&rdata
->refcount
);
1398 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1399 cifs_readv_receive
, smb2_readv_callback
,
1402 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1403 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1406 cifs_small_buf_release(buf
);
1411 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1412 unsigned int *nbytes
, char **buf
, int *buf_type
)
1414 int resp_buftype
, rc
= -EACCES
;
1415 struct smb2_read_rsp
*rsp
= NULL
;
1419 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1423 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1424 &resp_buftype
, CIFS_LOG_ERROR
);
1426 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1428 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1429 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1434 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1435 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
1437 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1438 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1439 (*nbytes
> io_parms
->length
)) {
1440 cifs_dbg(FYI
, "bad length %d for count %d\n",
1441 *nbytes
, io_parms
->length
);
1448 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1450 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1451 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1452 *buf
= iov
[0].iov_base
;
1453 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1454 *buf_type
= CIFS_SMALL_BUFFER
;
1455 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1456 *buf_type
= CIFS_LARGE_BUFFER
;
1462 * Check the mid_state and signature on received buffer (if any), and queue the
1463 * workqueue completion task.
1466 smb2_writev_callback(struct mid_q_entry
*mid
)
1468 struct cifs_writedata
*wdata
= mid
->callback_data
;
1469 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1470 unsigned int written
;
1471 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1472 unsigned int credits_received
= 1;
1474 switch (mid
->mid_state
) {
1475 case MID_RESPONSE_RECEIVED
:
1476 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1477 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1478 if (wdata
->result
!= 0)
1481 written
= le32_to_cpu(rsp
->DataLength
);
1483 * Mask off high 16 bits when bytes written as returned
1484 * by the server is greater than bytes requested by the
1485 * client. OS/2 servers are known to set incorrect
1488 if (written
> wdata
->bytes
)
1491 if (written
< wdata
->bytes
)
1492 wdata
->result
= -ENOSPC
;
1494 wdata
->bytes
= written
;
1496 case MID_REQUEST_SUBMITTED
:
1497 case MID_RETRY_NEEDED
:
1498 wdata
->result
= -EAGAIN
;
1501 wdata
->result
= -EIO
;
1506 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1508 queue_work(cifsiod_wq
, &wdata
->work
);
1509 DeleteMidQEntry(mid
);
1510 add_credits(tcon
->ses
->server
, credits_received
, 0);
1513 /* smb2_async_writev - send an async write, and set up mid to handle result */
1515 smb2_async_writev(struct cifs_writedata
*wdata
)
1518 struct smb2_write_req
*req
= NULL
;
1519 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1521 struct smb_rqst rqst
;
1523 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1525 goto async_writev_out
;
1527 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1529 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1530 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1531 req
->WriteChannelInfoOffset
= 0;
1532 req
->WriteChannelInfoLength
= 0;
1534 req
->Offset
= cpu_to_le64(wdata
->offset
);
1535 /* 4 for rfc1002 length field */
1536 req
->DataOffset
= cpu_to_le16(
1537 offsetof(struct smb2_write_req
, Buffer
) - 4);
1538 req
->RemainingBytes
= 0;
1540 /* 4 for rfc1002 length field and 1 for Buffer */
1541 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1546 rqst
.rq_pages
= wdata
->pages
;
1547 rqst
.rq_npages
= wdata
->nr_pages
;
1548 rqst
.rq_pagesz
= wdata
->pagesz
;
1549 rqst
.rq_tailsz
= wdata
->tailsz
;
1551 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
1552 wdata
->offset
, wdata
->bytes
);
1554 req
->Length
= cpu_to_le32(wdata
->bytes
);
1556 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1558 kref_get(&wdata
->refcount
);
1559 rc
= cifs_call_async(tcon
->ses
->server
, &rqst
, NULL
,
1560 smb2_writev_callback
, wdata
, 0);
1563 kref_put(&wdata
->refcount
, cifs_writedata_release
);
1564 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1568 cifs_small_buf_release(req
);
1573 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1574 * The length field from io_parms must be at least 1 and indicates a number of
1575 * elements with data to write that begins with position 1 in iov array. All
1576 * data length is specified by count.
1579 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1580 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1583 struct smb2_write_req
*req
= NULL
;
1584 struct smb2_write_rsp
*rsp
= NULL
;
1591 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1595 if (io_parms
->tcon
->ses
->server
== NULL
)
1596 return -ECONNABORTED
;
1598 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1600 req
->PersistentFileId
= io_parms
->persistent_fid
;
1601 req
->VolatileFileId
= io_parms
->volatile_fid
;
1602 req
->WriteChannelInfoOffset
= 0;
1603 req
->WriteChannelInfoLength
= 0;
1605 req
->Length
= cpu_to_le32(io_parms
->length
);
1606 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1607 /* 4 for rfc1002 length field */
1608 req
->DataOffset
= cpu_to_le16(
1609 offsetof(struct smb2_write_req
, Buffer
) - 4);
1610 req
->RemainingBytes
= 0;
1612 iov
[0].iov_base
= (char *)req
;
1613 /* 4 for rfc1002 length field and 1 for Buffer */
1614 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1616 /* length of entire message including data to be written */
1617 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1619 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
1621 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
1624 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
1625 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
1627 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1629 free_rsp_buf(resp_buftype
, rsp
);
1634 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
1637 unsigned int entrycount
= 0;
1638 unsigned int next_offset
= 0;
1639 FILE_DIRECTORY_INFO
*entryptr
;
1641 if (bufstart
== NULL
)
1644 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
1647 entryptr
= (FILE_DIRECTORY_INFO
*)
1648 ((char *)entryptr
+ next_offset
);
1650 if ((char *)entryptr
+ size
> end_of_buf
) {
1651 cifs_dbg(VFS
, "malformed search entry would overflow\n");
1655 len
= le32_to_cpu(entryptr
->FileNameLength
);
1656 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
1657 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
1662 *lastentry
= (char *)entryptr
;
1665 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
1677 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
1678 u64 persistent_fid
, u64 volatile_fid
, int index
,
1679 struct cifs_search_info
*srch_inf
)
1681 struct smb2_query_directory_req
*req
;
1682 struct smb2_query_directory_rsp
*rsp
= NULL
;
1687 unsigned char *bufptr
;
1688 struct TCP_Server_Info
*server
;
1689 struct cifs_ses
*ses
= tcon
->ses
;
1690 __le16 asteriks
= cpu_to_le16('*');
1692 unsigned int output_size
= CIFSMaxBufSize
;
1693 size_t info_buf_size
;
1695 if (ses
&& (ses
->server
))
1696 server
= ses
->server
;
1700 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
1704 switch (srch_inf
->info_level
) {
1705 case SMB_FIND_FILE_DIRECTORY_INFO
:
1706 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
1707 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
1709 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
1710 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
1711 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
1714 cifs_dbg(VFS
, "info level %u isn't supported\n",
1715 srch_inf
->info_level
);
1720 req
->FileIndex
= cpu_to_le32(index
);
1721 req
->PersistentFileId
= persistent_fid
;
1722 req
->VolatileFileId
= volatile_fid
;
1725 bufptr
= req
->Buffer
;
1726 memcpy(bufptr
, &asteriks
, len
);
1728 req
->FileNameOffset
=
1729 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
1730 req
->FileNameLength
= cpu_to_le16(len
);
1732 * BB could be 30 bytes or so longer if we used SMB2 specific
1733 * buffer lengths, but this is safe and close enough.
1735 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
1736 output_size
= min_t(unsigned int, output_size
, 2 << 15);
1737 req
->OutputBufferLength
= cpu_to_le32(output_size
);
1739 iov
[0].iov_base
= (char *)req
;
1740 /* 4 for RFC1001 length and 1 for Buffer */
1741 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1743 iov
[1].iov_base
= (char *)(req
->Buffer
);
1744 iov
[1].iov_len
= len
;
1746 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
1748 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
1749 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
1752 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
1756 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1757 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
1762 srch_inf
->unicode
= true;
1764 if (srch_inf
->ntwrk_buf_start
) {
1765 if (srch_inf
->smallBuf
)
1766 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
1768 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
1770 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
1771 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
1772 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
1773 /* 4 for rfc1002 length field */
1774 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
1775 srch_inf
->entries_in_buffer
=
1776 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
1777 &srch_inf
->last_entry
, info_buf_size
);
1778 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
1779 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
1780 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
1781 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
1782 if (resp_buftype
== CIFS_LARGE_BUFFER
)
1783 srch_inf
->smallBuf
= false;
1784 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
1785 srch_inf
->smallBuf
= true;
1787 cifs_dbg(VFS
, "illegal search buffer type\n");
1789 if (rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
)
1790 srch_inf
->endOfSearch
= 1;
1792 srch_inf
->endOfSearch
= 0;
1797 free_rsp_buf(resp_buftype
, rsp
);
1802 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1803 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
1804 unsigned int num
, void **data
, unsigned int *size
)
1806 struct smb2_set_info_req
*req
;
1807 struct smb2_set_info_rsp
*rsp
= NULL
;
1812 struct TCP_Server_Info
*server
;
1813 struct cifs_ses
*ses
= tcon
->ses
;
1815 if (ses
&& (ses
->server
))
1816 server
= ses
->server
;
1823 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
1827 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
1833 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
1835 req
->InfoType
= SMB2_O_INFO_FILE
;
1836 req
->FileInfoClass
= info_class
;
1837 req
->PersistentFileId
= persistent_fid
;
1838 req
->VolatileFileId
= volatile_fid
;
1840 /* 4 for RFC1001 length and 1 for Buffer */
1842 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
1843 req
->BufferLength
= cpu_to_le32(*size
);
1845 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
1847 memcpy(req
->Buffer
, *data
, *size
);
1849 iov
[0].iov_base
= (char *)req
;
1850 /* 4 for RFC1001 length */
1851 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1853 for (i
= 1; i
< num
; i
++) {
1854 inc_rfc1001_len(req
, size
[i
]);
1855 le32_add_cpu(&req
->BufferLength
, size
[i
]);
1856 iov
[i
].iov_base
= (char *)data
[i
];
1857 iov
[i
].iov_len
= size
[i
];
1860 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
1861 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
1864 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
1868 free_rsp_buf(resp_buftype
, rsp
);
1874 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
1875 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
1877 struct smb2_file_rename_info info
;
1879 unsigned int size
[2];
1881 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
1883 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
1887 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
1888 /* 0 = fail if target already exists */
1889 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
1890 info
.FileNameLength
= cpu_to_le32(len
);
1893 size
[0] = sizeof(struct smb2_file_rename_info
);
1895 data
[1] = target_file
;
1896 size
[1] = len
+ 2 /* null */;
1898 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1899 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
1906 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
1907 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
1909 struct smb2_file_link_info info
;
1911 unsigned int size
[2];
1913 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
1915 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
1919 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
1920 /* 0 = fail if link already exists */
1921 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
1922 info
.FileNameLength
= cpu_to_le32(len
);
1925 size
[0] = sizeof(struct smb2_file_link_info
);
1927 data
[1] = target_file
;
1928 size
[1] = len
+ 2 /* null */;
1930 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1931 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
1937 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1938 u64 volatile_fid
, u32 pid
, __le64
*eof
)
1940 struct smb2_file_eof_info info
;
1944 info
.EndOfFile
= *eof
;
1947 size
= sizeof(struct smb2_file_eof_info
);
1949 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
1950 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
1954 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1955 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
1958 size
= sizeof(FILE_BASIC_INFO
);
1959 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1960 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
1961 (void **)&buf
, &size
);
1965 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
1966 const u64 persistent_fid
, const u64 volatile_fid
,
1970 struct smb2_oplock_break
*req
= NULL
;
1972 cifs_dbg(FYI
, "SMB2_oplock_break\n");
1973 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
1978 req
->VolatileFid
= volatile_fid
;
1979 req
->PersistentFid
= persistent_fid
;
1980 req
->OplockLevel
= oplock_level
;
1981 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1983 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
1984 /* SMB2 buffer freed by function above */
1987 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
1988 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
1995 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
1996 struct kstatfs
*kst
)
1998 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
1999 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2000 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2001 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2002 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2007 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2008 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2011 struct smb2_query_info_req
*req
;
2013 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2015 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2018 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2022 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2023 req
->FileInfoClass
= level
;
2024 req
->PersistentFileId
= persistent_fid
;
2025 req
->VolatileFileId
= volatile_fid
;
2026 /* 4 for rfc1002 length field and 1 for pad */
2027 req
->InputBufferOffset
=
2028 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2029 req
->OutputBufferLength
= cpu_to_le32(
2030 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2032 iov
->iov_base
= (char *)req
;
2033 /* 4 for rfc1002 length field */
2034 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2039 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2040 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2042 struct smb2_query_info_rsp
*rsp
= NULL
;
2046 struct cifs_ses
*ses
= tcon
->ses
;
2047 struct smb2_fs_full_size_info
*info
= NULL
;
2049 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2050 sizeof(struct smb2_fs_full_size_info
),
2051 persistent_fid
, volatile_fid
);
2055 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2057 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2060 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2062 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2063 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2064 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2065 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2066 sizeof(struct smb2_fs_full_size_info
));
2068 copy_fs_info_to_kstatfs(info
, fsdata
);
2071 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2076 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2077 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2078 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2081 struct smb2_lock_req
*req
= NULL
;
2086 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2088 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2092 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2093 req
->LockCount
= cpu_to_le16(num_lock
);
2095 req
->PersistentFileId
= persist_fid
;
2096 req
->VolatileFileId
= volatile_fid
;
2098 count
= num_lock
* sizeof(struct smb2_lock_element
);
2099 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2101 iov
[0].iov_base
= (char *)req
;
2102 /* 4 for rfc1002 length field and count for all locks */
2103 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2104 iov
[1].iov_base
= (char *)buf
;
2105 iov
[1].iov_len
= count
;
2107 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2108 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2110 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2111 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2118 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2119 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2120 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2123 struct smb2_lock_element lock
;
2125 lock
.Offset
= cpu_to_le64(offset
);
2126 lock
.Length
= cpu_to_le64(length
);
2127 lock
.Flags
= cpu_to_le32(lock_flags
);
2128 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2129 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2131 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2135 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2136 __u8
*lease_key
, const __le32 lease_state
)
2139 struct smb2_lease_ack
*req
= NULL
;
2141 cifs_dbg(FYI
, "SMB2_lease_break\n");
2142 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2147 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2148 req
->StructureSize
= cpu_to_le16(36);
2149 inc_rfc1001_len(req
, 12);
2151 memcpy(req
->LeaseKey
, lease_key
, 16);
2152 req
->LeaseState
= lease_state
;
2154 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2155 /* SMB2 buffer freed by function above */
2158 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2159 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);