4 * Copyright (C) International Business Machines Corp., 2009, 2011
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
&&
123 (tcon
->ses
->server
->sec_mode
& SECMODE_SIGN_REQUIRED
))
124 hdr
->Flags
|= SMB2_FLAGS_SIGNED
;
126 pdu
->StructureSize2
= cpu_to_le16(parmsize
);
131 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
134 struct nls_table
*nls_codepage
;
135 struct cifs_ses
*ses
;
136 struct TCP_Server_Info
*server
;
139 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
140 * check for tcp and smb session status done differently
141 * for those three - in the calling routine.
146 if (smb2_command
== SMB2_TREE_CONNECT
)
149 if (tcon
->tidStatus
== CifsExiting
) {
151 * only tree disconnect, open, and write,
152 * (and ulogoff which does not have tcon)
153 * are allowed as we start force umount.
155 if ((smb2_command
!= SMB2_WRITE
) &&
156 (smb2_command
!= SMB2_CREATE
) &&
157 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
158 cFYI(1, "can not send cmd %d while umounting",
163 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
164 (!tcon
->ses
->server
))
168 server
= ses
->server
;
171 * Give demultiplex thread up to 10 seconds to reconnect, should be
172 * greater than cifs socket timeout which is 7 seconds
174 while (server
->tcpStatus
== CifsNeedReconnect
) {
176 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
177 * here since they are implicitly done when session drops.
179 switch (smb2_command
) {
181 * BB Should we keep oplock break and add flush to exceptions?
183 case SMB2_TREE_DISCONNECT
:
186 case SMB2_OPLOCK_BREAK
:
190 wait_event_interruptible_timeout(server
->response_q
,
191 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
193 /* are we still trying to reconnect? */
194 if (server
->tcpStatus
!= CifsNeedReconnect
)
198 * on "soft" mounts we wait once. Hard mounts keep
199 * retrying until process is killed or server comes
203 cFYI(1, "gave up waiting on reconnect in smb_init");
208 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
211 nls_codepage
= load_nls_default();
214 * need to prevent multiple threads trying to simultaneously reconnect
215 * the same SMB session
217 mutex_lock(&tcon
->ses
->session_mutex
);
218 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
219 if (!rc
&& tcon
->ses
->need_reconnect
)
220 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
222 if (rc
|| !tcon
->need_reconnect
) {
223 mutex_unlock(&tcon
->ses
->session_mutex
);
227 cifs_mark_open_files_invalid(tcon
);
228 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
229 mutex_unlock(&tcon
->ses
->session_mutex
);
230 cFYI(1, "reconnect tcon rc = %d", rc
);
233 atomic_inc(&tconInfoReconnectCount
);
235 * BB FIXME add code to check if wsize needs update due to negotiated
236 * smb buffer size shrinking.
240 * Check if handle based operation so we know whether we can continue
241 * or not without returning to caller to reset file handle.
244 * BB Is flush done by server on drop of tcp session? Should we special
245 * case it and skip above?
247 switch (smb2_command
) {
253 case SMB2_QUERY_DIRECTORY
:
254 case SMB2_CHANGE_NOTIFY
:
255 case SMB2_QUERY_INFO
:
259 unload_nls(nls_codepage
);
264 * Allocate and return pointer to an SMB request hdr, and set basic
265 * SMB information in the SMB header. If the return code is zero, this
266 * function must have filled in request_buf pointer.
269 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
274 rc
= smb2_reconnect(smb2_command
, tcon
);
278 /* BB eventually switch this to SMB2 specific small buf size */
279 *request_buf
= cifs_small_buf_get();
280 if (*request_buf
== NULL
) {
281 /* BB should we add a retry in here if not a writepage? */
285 smb2_hdr_assemble((struct smb2_hdr
*) *request_buf
, smb2_command
, tcon
);
288 #ifdef CONFIG_CIFS_STATS2
289 uint16_t com_code
= le16_to_cpu(smb2_command
);
290 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
292 cifs_stats_inc(&tcon
->num_smbs_sent
);
299 free_rsp_buf(int resp_buftype
, void *rsp
)
301 if (resp_buftype
== CIFS_SMALL_BUFFER
)
302 cifs_small_buf_release(rsp
);
303 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
304 cifs_buf_release(rsp
);
307 #define SMB2_NUM_PROT 2
311 #define BAD_PROT 0xFFFF
313 #define SMB2_PROT_ID 0x0202
314 #define SMB21_PROT_ID 0x0210
315 #define BAD_PROT_ID 0xFFFF
320 } smb2protocols
[] = {
321 {SMB2_PROT
, cpu_to_le16(SMB2_PROT_ID
)},
322 {SMB21_PROT
, cpu_to_le16(SMB21_PROT_ID
)},
323 {BAD_PROT
, cpu_to_le16(BAD_PROT_ID
)}
328 * SMB2 Worker functions follow:
330 * The general structure of the worker functions is:
331 * 1) Call smb2_init (assembles SMB2 header)
332 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
333 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
334 * 4) Decode SMB2 command specific fields in the fixed length area
335 * 5) Decode variable length data area (if any for this SMB2 command type)
336 * 6) Call free smb buffer
342 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
344 struct smb2_negotiate_req
*req
;
345 struct smb2_negotiate_rsp
*rsp
;
349 struct TCP_Server_Info
*server
;
350 unsigned int sec_flags
;
353 int blob_offset
, blob_length
;
355 int flags
= CIFS_NEG_OP
;
357 cFYI(1, "Negotiate protocol");
360 server
= ses
->server
;
366 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
370 /* if any of auth flags (ie not sign or seal) are overriden use them */
371 if (ses
->overrideSecFlg
& (~(CIFSSEC_MUST_SIGN
| CIFSSEC_MUST_SEAL
)))
372 sec_flags
= ses
->overrideSecFlg
; /* BB FIXME fix sign flags?*/
373 else /* if override flags set only sign/seal OR them with global auth */
374 sec_flags
= global_secflags
| ses
->overrideSecFlg
;
376 cFYI(1, "sec_flags 0x%x", sec_flags
);
378 req
->hdr
.SessionId
= 0;
380 for (i
= 0; i
< SMB2_NUM_PROT
; i
++)
381 req
->Dialects
[i
] = smb2protocols
[i
].name
;
383 req
->DialectCount
= cpu_to_le16(i
);
384 inc_rfc1001_len(req
, i
* 2);
386 /* only one of SMB2 signing flags may be set in SMB2 request */
387 if ((sec_flags
& CIFSSEC_MUST_SIGN
) == CIFSSEC_MUST_SIGN
)
388 temp
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
389 else if (sec_flags
& CIFSSEC_MAY_SIGN
) /* MAY_SIGN is a single flag */
390 temp
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
392 req
->SecurityMode
= cpu_to_le16(temp
);
394 req
->Capabilities
= cpu_to_le32(SMB2_GLOBAL_CAP_DFS
);
396 memcpy(req
->ClientGUID
, cifs_client_guid
, SMB2_CLIENT_GUID_SIZE
);
398 iov
[0].iov_base
= (char *)req
;
399 /* 4 for rfc1002 length field */
400 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
402 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
);
404 rsp
= (struct smb2_negotiate_rsp
*)iov
[0].iov_base
;
406 * No tcon so can't do
407 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
417 cFYI(1, "mode 0x%x", rsp
->SecurityMode
);
419 if (rsp
->DialectRevision
== smb2protocols
[SMB21_PROT
].name
)
420 cFYI(1, "negotiated smb2.1 dialect");
421 else if (rsp
->DialectRevision
== smb2protocols
[SMB2_PROT
].name
)
422 cFYI(1, "negotiated smb2 dialect");
424 cERROR(1, "Illegal dialect returned by server %d",
425 le16_to_cpu(rsp
->DialectRevision
));
429 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
431 server
->maxBuf
= le32_to_cpu(rsp
->MaxTransactSize
);
432 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
433 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
434 /* BB Do we need to validate the SecurityMode? */
435 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
436 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
438 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
440 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
442 if (blob_length
== 0) {
443 cERROR(1, "missing security blob on negprot");
448 cFYI(1, "sec_flags 0x%x", sec_flags
);
449 if (sec_flags
& CIFSSEC_MUST_SIGN
) {
450 cFYI(1, "Signing required");
451 if (!(server
->sec_mode
& (SMB2_NEGOTIATE_SIGNING_REQUIRED
|
452 SMB2_NEGOTIATE_SIGNING_ENABLED
))) {
453 cERROR(1, "signing required but server lacks support");
457 server
->sec_mode
|= SECMODE_SIGN_REQUIRED
;
458 } else if (sec_flags
& CIFSSEC_MAY_SIGN
) {
459 cFYI(1, "Signing optional");
460 if (server
->sec_mode
& SMB2_NEGOTIATE_SIGNING_REQUIRED
) {
461 cFYI(1, "Server requires signing");
462 server
->sec_mode
|= SECMODE_SIGN_REQUIRED
;
465 ~(SECMODE_SIGN_ENABLED
| SECMODE_SIGN_REQUIRED
);
468 cFYI(1, "Signing disabled");
469 if (server
->sec_mode
& SMB2_NEGOTIATE_SIGNING_REQUIRED
) {
470 cERROR(1, "Server requires packet signing to be enabled"
471 " in /proc/fs/cifs/SecurityFlags.");
476 ~(SECMODE_SIGN_ENABLED
| SECMODE_SIGN_REQUIRED
);
479 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
480 rc
= decode_neg_token_init(security_blob
, blob_length
,
491 free_rsp_buf(resp_buftype
, rsp
);
496 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
497 const struct nls_table
*nls_cp
)
499 struct smb2_sess_setup_req
*req
;
500 struct smb2_sess_setup_rsp
*rsp
= NULL
;
504 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
505 struct TCP_Server_Info
*server
;
506 unsigned int sec_flags
;
510 char *ntlmssp_blob
= NULL
;
511 bool use_spnego
= false; /* else use raw ntlmssp */
513 cFYI(1, "Session Setup");
516 server
= ses
->server
;
523 * If memory allocation is successful, caller of this function
526 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
530 ses
->server
->secType
= RawNTLMSSP
;
532 ssetup_ntlmssp_authenticate
:
533 if (phase
== NtLmChallenge
)
534 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
536 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
540 /* if any of auth flags (ie not sign or seal) are overriden use them */
541 if (ses
->overrideSecFlg
& (~(CIFSSEC_MUST_SIGN
| CIFSSEC_MUST_SEAL
)))
542 sec_flags
= ses
->overrideSecFlg
; /* BB FIXME fix sign flags?*/
543 else /* if override flags set only sign/seal OR them with global auth */
544 sec_flags
= global_secflags
| ses
->overrideSecFlg
;
546 cFYI(1, "sec_flags 0x%x", sec_flags
);
548 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
549 req
->VcNumber
= 0; /* MBZ */
550 /* to enable echos and oplocks */
551 req
->hdr
.CreditRequest
= cpu_to_le16(3);
553 /* only one of SMB2 signing flags may be set in SMB2 request */
554 if ((sec_flags
& CIFSSEC_MUST_SIGN
) == CIFSSEC_MUST_SIGN
)
555 temp
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
556 else if (ses
->server
->sec_mode
& SMB2_NEGOTIATE_SIGNING_REQUIRED
)
557 temp
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
558 else if (sec_flags
& CIFSSEC_MAY_SIGN
) /* MAY_SIGN is a single flag */
559 temp
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
561 req
->SecurityMode
= temp
;
562 req
->Capabilities
= 0;
563 req
->Channel
= 0; /* MBZ */
565 iov
[0].iov_base
= (char *)req
;
566 /* 4 for rfc1002 length field and 1 for pad */
567 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
568 if (phase
== NtLmNegotiate
) {
569 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
571 if (ntlmssp_blob
== NULL
) {
575 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
577 /* blob_length = build_spnego_ntlmssp_blob(
579 sizeof(struct _NEGOTIATE_MESSAGE),
581 /* BB eventually need to add this */
582 cERROR(1, "spnego not supported for SMB2 yet");
587 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
588 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
589 security_blob
= ntlmssp_blob
;
591 } else if (phase
== NtLmAuthenticate
) {
592 req
->hdr
.SessionId
= ses
->Suid
;
593 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
595 if (ntlmssp_blob
== NULL
) {
596 cERROR(1, "failed to malloc ntlmssp blob");
600 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
603 cFYI(1, "build_ntlmssp_auth_blob failed %d", rc
);
604 goto ssetup_exit
; /* BB double check error handling */
607 /* blob_length = build_spnego_ntlmssp_blob(
611 cERROR(1, "spnego not supported for SMB2 yet");
616 security_blob
= ntlmssp_blob
;
619 cERROR(1, "illegal ntlmssp phase");
624 /* Testing shows that buffer offset must be at location of Buffer[0] */
625 req
->SecurityBufferOffset
=
626 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
627 1 /* pad */ - 4 /* rfc1001 len */);
628 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
629 iov
[1].iov_base
= security_blob
;
630 iov
[1].iov_len
= blob_length
;
632 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
634 /* BB add code to build os and lm fields */
636 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, CIFS_LOG_ERROR
);
638 kfree(security_blob
);
639 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
640 if (rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
641 if (phase
!= NtLmNegotiate
) {
642 cERROR(1, "Unexpected more processing error");
645 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
646 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
647 cERROR(1, "Invalid security buffer offset %d",
648 le16_to_cpu(rsp
->SecurityBufferOffset
));
653 /* NTLMSSP Negotiate sent now processing challenge (response) */
654 phase
= NtLmChallenge
; /* process ntlmssp challenge */
655 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
656 ses
->Suid
= rsp
->hdr
.SessionId
;
657 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
658 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
662 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
663 * but at least the raw NTLMSSP case works.
666 * No tcon so can't do
667 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
677 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
679 free_rsp_buf(resp_buftype
, rsp
);
681 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
682 if ((phase
== NtLmChallenge
) && (rc
== 0))
683 goto ssetup_ntlmssp_authenticate
;
688 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
690 struct smb2_logoff_req
*req
; /* response is also trivial struct */
692 struct TCP_Server_Info
*server
;
694 cFYI(1, "disconnect session %p", ses
);
696 if (ses
&& (ses
->server
))
697 server
= ses
->server
;
701 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
705 /* since no tcon, smb2_init can not do this, so do here */
706 req
->hdr
.SessionId
= ses
->Suid
;
707 if (server
->sec_mode
& SECMODE_SIGN_REQUIRED
)
708 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
710 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
712 * No tcon so can't do
713 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
718 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
720 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
723 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
726 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
727 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
729 struct smb2_tree_connect_req
*req
;
730 struct smb2_tree_connect_rsp
*rsp
= NULL
;
735 struct TCP_Server_Info
*server
;
736 __le16
*unc_path
= NULL
;
740 if ((ses
->server
) && tree
)
741 server
= ses
->server
;
745 if (tcon
&& tcon
->bad_network_name
)
748 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
749 if (unc_path
== NULL
)
752 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
754 if (unc_path_len
< 2) {
759 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
766 /* since no tcon, smb2_init can not do this, so do here */
767 req
->hdr
.SessionId
= ses
->Suid
;
768 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
769 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
772 iov
[0].iov_base
= (char *)req
;
773 /* 4 for rfc1002 length field and 1 for pad */
774 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
776 /* Testing shows that buffer offset must be at location of Buffer[0] */
777 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
778 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
779 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
780 iov
[1].iov_base
= unc_path
;
781 iov
[1].iov_len
= unc_path_len
;
783 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
785 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
786 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
790 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
791 tcon
->need_reconnect
= true;
793 goto tcon_error_exit
;
802 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
806 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
807 cFYI(1, "connection to disk share");
808 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
810 cFYI(1, "connection to pipe share");
811 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
813 cFYI(1, "connection to printer");
815 cERROR(1, "unknown share type %d", rsp
->ShareType
);
817 goto tcon_error_exit
;
820 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
821 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
822 tcon
->tidStatus
= CifsGood
;
823 tcon
->need_reconnect
= false;
824 tcon
->tid
= rsp
->hdr
.TreeId
;
825 strncpy(tcon
->treeName
, tree
, MAX_TREE_SIZE
);
827 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
828 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
829 cERROR(1, "DFS capability contradicts DFS flag");
832 free_rsp_buf(resp_buftype
, rsp
);
837 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
838 cERROR(1, "BAD_NETWORK_NAME: %s", tree
);
839 tcon
->bad_network_name
= true;
845 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
847 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
849 struct TCP_Server_Info
*server
;
850 struct cifs_ses
*ses
= tcon
->ses
;
852 cFYI(1, "Tree Disconnect");
854 if (ses
&& (ses
->server
))
855 server
= ses
->server
;
859 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
862 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
866 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
868 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
873 static struct create_lease
*
874 create_lease_buf(u8
*lease_key
, u8 oplock
)
876 struct create_lease
*buf
;
878 buf
= kmalloc(sizeof(struct create_lease
), GFP_KERNEL
);
882 memset(buf
, 0, sizeof(struct create_lease
));
884 buf
->lcontext
.LeaseKeyLow
= cpu_to_le64(*((u64
*)lease_key
));
885 buf
->lcontext
.LeaseKeyHigh
= cpu_to_le64(*((u64
*)(lease_key
+ 8)));
886 if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
)
887 buf
->lcontext
.LeaseState
= SMB2_LEASE_WRITE_CACHING
|
888 SMB2_LEASE_READ_CACHING
;
889 else if (oplock
== SMB2_OPLOCK_LEVEL_II
)
890 buf
->lcontext
.LeaseState
= SMB2_LEASE_READ_CACHING
;
891 else if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
)
892 buf
->lcontext
.LeaseState
= SMB2_LEASE_HANDLE_CACHING
|
893 SMB2_LEASE_READ_CACHING
|
894 SMB2_LEASE_WRITE_CACHING
;
896 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
897 (struct create_lease
, lcontext
));
898 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context
));
899 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
900 (struct create_lease
, Name
));
901 buf
->ccontext
.NameLength
= cpu_to_le16(4);
910 parse_lease_state(struct smb2_create_rsp
*rsp
)
913 struct create_lease
*lc
;
917 data_offset
= (char *)rsp
;
918 data_offset
+= 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
919 lc
= (struct create_lease
*)data_offset
;
921 char *name
= le16_to_cpu(lc
->ccontext
.NameOffset
) + (char *)lc
;
922 if (le16_to_cpu(lc
->ccontext
.NameLength
) != 4 ||
923 strncmp(name
, "RqLs", 4)) {
924 lc
= (struct create_lease
*)((char *)lc
925 + le32_to_cpu(lc
->ccontext
.Next
));
928 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS
)
929 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
932 } while (le32_to_cpu(lc
->ccontext
.Next
) != 0);
937 if (le32_to_cpu(lc
->lcontext
.LeaseState
) & SMB2_LEASE_WRITE_CACHING
) {
938 if (le32_to_cpu(lc
->lcontext
.LeaseState
) &
939 SMB2_LEASE_HANDLE_CACHING
)
940 oplock
= SMB2_OPLOCK_LEVEL_BATCH
;
942 oplock
= SMB2_OPLOCK_LEVEL_EXCLUSIVE
;
943 } else if (le32_to_cpu(lc
->lcontext
.LeaseState
) &
944 SMB2_LEASE_READ_CACHING
)
945 oplock
= SMB2_OPLOCK_LEVEL_II
;
951 SMB2_open(const unsigned int xid
, struct cifs_tcon
*tcon
, __le16
*path
,
952 u64
*persistent_fid
, u64
*volatile_fid
, __u32 desired_access
,
953 __u32 create_disposition
, __u32 file_attributes
, __u32 create_options
,
954 __u8
*oplock
, struct smb2_file_all_info
*buf
)
956 struct smb2_create_req
*req
;
957 struct smb2_create_rsp
*rsp
;
958 struct TCP_Server_Info
*server
;
959 struct cifs_ses
*ses
= tcon
->ses
;
963 __le16
*copy_path
= NULL
;
968 cFYI(1, "create/open");
970 if (ses
&& (ses
->server
))
971 server
= ses
->server
;
975 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
979 req
->ImpersonationLevel
= IL_IMPERSONATION
;
980 req
->DesiredAccess
= cpu_to_le32(desired_access
);
981 /* File attributes ignored on open (used in create though) */
982 req
->FileAttributes
= cpu_to_le32(file_attributes
);
983 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
984 req
->CreateDisposition
= cpu_to_le32(create_disposition
);
985 req
->CreateOptions
= cpu_to_le32(create_options
);
986 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
987 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
)
988 - 8 /* pad */ - 4 /* do not count rfc1001 len field */);
990 iov
[0].iov_base
= (char *)req
;
991 /* 4 for rfc1002 length field */
992 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
994 /* MUST set path len (NameLength) to 0 opening root of share */
995 if (uni_path_len
>= 4) {
996 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
997 /* -1 since last byte is buf[0] which is sent below (path) */
999 if (uni_path_len
% 8 != 0) {
1000 copy_size
= uni_path_len
/ 8 * 8;
1001 if (copy_size
< uni_path_len
)
1004 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1007 memcpy((char *)copy_path
, (const char *)path
,
1009 uni_path_len
= copy_size
;
1013 iov
[1].iov_len
= uni_path_len
;
1014 iov
[1].iov_base
= path
;
1016 * -1 since last byte is buf[0] which was counted in
1019 inc_rfc1001_len(req
, uni_path_len
- 1);
1021 iov
[0].iov_len
+= 7;
1022 req
->hdr
.smb2_buf_length
= cpu_to_be32(be32_to_cpu(
1023 req
->hdr
.smb2_buf_length
) + 8 - 1);
1025 req
->NameLength
= 0;
1028 if (!server
->oplocks
)
1029 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1031 if (!(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1032 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1033 req
->RequestedOplockLevel
= *oplock
;
1035 iov
[num_iovecs
].iov_base
= create_lease_buf(oplock
+1, *oplock
);
1036 if (iov
[num_iovecs
].iov_base
== NULL
) {
1037 cifs_small_buf_release(req
);
1041 iov
[num_iovecs
].iov_len
= sizeof(struct create_lease
);
1042 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1043 req
->CreateContextsOffset
= cpu_to_le32(
1044 sizeof(struct smb2_create_req
) - 4 - 8 +
1045 iov
[num_iovecs
-1].iov_len
);
1046 req
->CreateContextsLength
= cpu_to_le32(
1047 sizeof(struct create_lease
));
1048 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_lease
));
1052 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1053 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
1056 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1064 *persistent_fid
= rsp
->PersistentFileId
;
1065 *volatile_fid
= rsp
->VolatileFileId
;
1068 memcpy(buf
, &rsp
->CreationTime
, 32);
1069 buf
->AllocationSize
= rsp
->AllocationSize
;
1070 buf
->EndOfFile
= rsp
->EndofFile
;
1071 buf
->Attributes
= rsp
->FileAttributes
;
1072 buf
->NumberOfLinks
= cpu_to_le32(1);
1073 buf
->DeletePending
= 0;
1076 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1077 *oplock
= parse_lease_state(rsp
);
1079 *oplock
= rsp
->OplockLevel
;
1082 free_rsp_buf(resp_buftype
, rsp
);
1087 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1088 u64 persistent_fid
, u64 volatile_fid
)
1090 struct smb2_close_req
*req
;
1091 struct smb2_close_rsp
*rsp
;
1092 struct TCP_Server_Info
*server
;
1093 struct cifs_ses
*ses
= tcon
->ses
;
1100 if (ses
&& (ses
->server
))
1101 server
= ses
->server
;
1105 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1109 req
->PersistentFileId
= persistent_fid
;
1110 req
->VolatileFileId
= volatile_fid
;
1112 iov
[0].iov_base
= (char *)req
;
1113 /* 4 for rfc1002 length field */
1114 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1116 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1117 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1121 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1130 /* BB FIXME - decode close response, update inode for caching */
1133 free_rsp_buf(resp_buftype
, rsp
);
1138 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1139 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1142 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1143 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1144 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1145 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1148 if (buffer_length
< min_buf_size
) {
1149 cERROR(1, "buffer length %d smaller than minimum size %d",
1150 buffer_length
, min_buf_size
);
1154 /* check if beyond RFC1001 maximum length */
1155 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1156 cERROR(1, "buffer length %d or smb length %d too large",
1157 buffer_length
, smb_len
);
1161 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1162 cERROR(1, "illegal server response, bad offset to data");
1170 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1171 * Caller must free buffer.
1174 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1175 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1179 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1185 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1189 memcpy(data
, begin_of_buf
, buffer_length
);
1195 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1196 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1197 size_t output_len
, size_t min_len
, void *data
)
1199 struct smb2_query_info_req
*req
;
1200 struct smb2_query_info_rsp
*rsp
= NULL
;
1204 struct TCP_Server_Info
*server
;
1205 struct cifs_ses
*ses
= tcon
->ses
;
1207 cFYI(1, "Query Info");
1209 if (ses
&& (ses
->server
))
1210 server
= ses
->server
;
1214 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1218 req
->InfoType
= SMB2_O_INFO_FILE
;
1219 req
->FileInfoClass
= info_class
;
1220 req
->PersistentFileId
= persistent_fid
;
1221 req
->VolatileFileId
= volatile_fid
;
1222 /* 4 for rfc1002 length field and 1 for Buffer */
1223 req
->InputBufferOffset
=
1224 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1225 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1227 iov
[0].iov_base
= (char *)req
;
1228 /* 4 for rfc1002 length field */
1229 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1231 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1233 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1237 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1239 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1240 le32_to_cpu(rsp
->OutputBufferLength
),
1241 &rsp
->hdr
, min_len
, data
);
1244 free_rsp_buf(resp_buftype
, rsp
);
1249 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1250 u64 persistent_fid
, u64 volatile_fid
,
1251 struct smb2_file_all_info
*data
)
1253 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1254 FILE_ALL_INFORMATION
,
1255 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1256 sizeof(struct smb2_file_all_info
), data
);
1260 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1261 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1263 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1264 FILE_INTERNAL_INFORMATION
,
1265 sizeof(struct smb2_file_internal_info
),
1266 sizeof(struct smb2_file_internal_info
), uniqueid
);
1270 * This is a no-op for now. We're not really interested in the reply, but
1271 * rather in the fact that the server sent one and that server->lstrp
1274 * FIXME: maybe we should consider checking that the reply matches request?
1277 smb2_echo_callback(struct mid_q_entry
*mid
)
1279 struct TCP_Server_Info
*server
= mid
->callback_data
;
1280 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1281 unsigned int credits_received
= 1;
1283 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1284 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1286 DeleteMidQEntry(mid
);
1287 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1291 SMB2_echo(struct TCP_Server_Info
*server
)
1293 struct smb2_echo_req
*req
;
1296 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1299 cFYI(1, "In echo request");
1301 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1305 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1307 iov
.iov_base
= (char *)req
;
1308 /* 4 for rfc1002 length field */
1309 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1311 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1314 cFYI(1, "Echo request failed: %d", rc
);
1316 cifs_small_buf_release(req
);
1321 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1324 struct smb2_flush_req
*req
;
1325 struct TCP_Server_Info
*server
;
1326 struct cifs_ses
*ses
= tcon
->ses
;
1333 if (ses
&& (ses
->server
))
1334 server
= ses
->server
;
1338 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1342 req
->PersistentFileId
= persistent_fid
;
1343 req
->VolatileFileId
= volatile_fid
;
1345 iov
[0].iov_base
= (char *)req
;
1346 /* 4 for rfc1002 length field */
1347 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1349 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1351 if ((rc
!= 0) && tcon
)
1352 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1354 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1359 * To form a chain of read requests, any read requests after the first should
1360 * have the end_of_chain boolean set to true.
1363 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1364 unsigned int remaining_bytes
, int request_type
)
1367 struct smb2_read_req
*req
= NULL
;
1369 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1372 if (io_parms
->tcon
->ses
->server
== NULL
)
1373 return -ECONNABORTED
;
1375 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1377 req
->PersistentFileId
= io_parms
->persistent_fid
;
1378 req
->VolatileFileId
= io_parms
->volatile_fid
;
1379 req
->ReadChannelInfoOffset
= 0; /* reserved */
1380 req
->ReadChannelInfoLength
= 0; /* reserved */
1381 req
->Channel
= 0; /* reserved */
1382 req
->MinimumCount
= 0;
1383 req
->Length
= cpu_to_le32(io_parms
->length
);
1384 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1386 if (request_type
& CHAINED_REQUEST
) {
1387 if (!(request_type
& END_OF_CHAIN
)) {
1388 /* 4 for rfc1002 length field */
1389 req
->hdr
.NextCommand
=
1390 cpu_to_le32(get_rfc1002_length(req
) + 4);
1391 } else /* END_OF_CHAIN */
1392 req
->hdr
.NextCommand
= 0;
1393 if (request_type
& RELATED_REQUEST
) {
1394 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1396 * Related requests use info from previous read request
1399 req
->hdr
.SessionId
= 0xFFFFFFFF;
1400 req
->hdr
.TreeId
= 0xFFFFFFFF;
1401 req
->PersistentFileId
= 0xFFFFFFFF;
1402 req
->VolatileFileId
= 0xFFFFFFFF;
1405 if (remaining_bytes
> io_parms
->length
)
1406 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1408 req
->RemainingBytes
= 0;
1410 iov
[0].iov_base
= (char *)req
;
1411 /* 4 for rfc1002 length field */
1412 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1417 smb2_readv_callback(struct mid_q_entry
*mid
)
1419 struct cifs_readdata
*rdata
= mid
->callback_data
;
1420 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1421 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1422 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1423 unsigned int credits_received
= 1;
1424 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1426 .rq_pages
= rdata
->pages
,
1427 .rq_npages
= rdata
->nr_pages
,
1428 .rq_pagesz
= rdata
->pagesz
,
1429 .rq_tailsz
= rdata
->tailsz
};
1431 cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __func__
,
1432 mid
->mid
, mid
->mid_state
, rdata
->result
, rdata
->bytes
);
1434 switch (mid
->mid_state
) {
1435 case MID_RESPONSE_RECEIVED
:
1436 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1437 /* result already set, check signature */
1438 if (server
->sec_mode
&
1439 (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
)) {
1442 rc
= smb2_verify_signature(&rqst
, server
);
1444 cERROR(1, "SMB signature verification returned "
1447 /* FIXME: should this be counted toward the initiating task? */
1448 task_io_account_read(rdata
->bytes
);
1449 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1451 case MID_REQUEST_SUBMITTED
:
1452 case MID_RETRY_NEEDED
:
1453 rdata
->result
= -EAGAIN
;
1456 if (rdata
->result
!= -ENODATA
)
1457 rdata
->result
= -EIO
;
1461 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1463 queue_work(cifsiod_wq
, &rdata
->work
);
1464 DeleteMidQEntry(mid
);
1465 add_credits(server
, credits_received
, 0);
1468 /* smb2_async_readv - send an async write, and set up mid to handle result */
1470 smb2_async_readv(struct cifs_readdata
*rdata
)
1473 struct smb2_hdr
*buf
;
1474 struct cifs_io_parms io_parms
;
1475 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1478 cFYI(1, "%s: offset=%llu bytes=%u", __func__
,
1479 rdata
->offset
, rdata
->bytes
);
1481 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1482 io_parms
.offset
= rdata
->offset
;
1483 io_parms
.length
= rdata
->bytes
;
1484 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1485 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1486 io_parms
.pid
= rdata
->pid
;
1487 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1491 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1492 /* 4 for rfc1002 length field */
1493 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1495 kref_get(&rdata
->refcount
);
1496 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1497 cifs_readv_receive
, smb2_readv_callback
,
1500 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1502 cifs_small_buf_release(buf
);
1507 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1508 unsigned int *nbytes
, char **buf
, int *buf_type
)
1510 int resp_buftype
, rc
= -EACCES
;
1511 struct smb2_read_rsp
*rsp
= NULL
;
1515 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1519 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1520 &resp_buftype
, CIFS_LOG_ERROR
);
1522 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1524 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1525 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1530 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1531 cERROR(1, "Send error in read = %d", rc
);
1533 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1534 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1535 (*nbytes
> io_parms
->length
)) {
1536 cFYI(1, "bad length %d for count %d", *nbytes
,
1544 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1546 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1547 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1548 *buf
= iov
[0].iov_base
;
1549 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1550 *buf_type
= CIFS_SMALL_BUFFER
;
1551 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1552 *buf_type
= CIFS_LARGE_BUFFER
;
1558 * Check the mid_state and signature on received buffer (if any), and queue the
1559 * workqueue completion task.
1562 smb2_writev_callback(struct mid_q_entry
*mid
)
1564 struct cifs_writedata
*wdata
= mid
->callback_data
;
1565 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1566 unsigned int written
;
1567 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1568 unsigned int credits_received
= 1;
1570 switch (mid
->mid_state
) {
1571 case MID_RESPONSE_RECEIVED
:
1572 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1573 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1574 if (wdata
->result
!= 0)
1577 written
= le32_to_cpu(rsp
->DataLength
);
1579 * Mask off high 16 bits when bytes written as returned
1580 * by the server is greater than bytes requested by the
1581 * client. OS/2 servers are known to set incorrect
1584 if (written
> wdata
->bytes
)
1587 if (written
< wdata
->bytes
)
1588 wdata
->result
= -ENOSPC
;
1590 wdata
->bytes
= written
;
1592 case MID_REQUEST_SUBMITTED
:
1593 case MID_RETRY_NEEDED
:
1594 wdata
->result
= -EAGAIN
;
1597 wdata
->result
= -EIO
;
1602 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1604 queue_work(cifsiod_wq
, &wdata
->work
);
1605 DeleteMidQEntry(mid
);
1606 add_credits(tcon
->ses
->server
, credits_received
, 0);
1609 /* smb2_async_writev - send an async write, and set up mid to handle result */
1611 smb2_async_writev(struct cifs_writedata
*wdata
)
1614 struct smb2_write_req
*req
= NULL
;
1615 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1617 struct smb_rqst rqst
;
1619 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1621 goto async_writev_out
;
1623 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1625 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1626 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1627 req
->WriteChannelInfoOffset
= 0;
1628 req
->WriteChannelInfoLength
= 0;
1630 req
->Offset
= cpu_to_le64(wdata
->offset
);
1631 /* 4 for rfc1002 length field */
1632 req
->DataOffset
= cpu_to_le16(
1633 offsetof(struct smb2_write_req
, Buffer
) - 4);
1634 req
->RemainingBytes
= 0;
1636 /* 4 for rfc1002 length field and 1 for Buffer */
1637 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1642 rqst
.rq_pages
= wdata
->pages
;
1643 rqst
.rq_npages
= wdata
->nr_pages
;
1644 rqst
.rq_pagesz
= wdata
->pagesz
;
1645 rqst
.rq_tailsz
= wdata
->tailsz
;
1647 cFYI(1, "async write at %llu %u bytes", wdata
->offset
, wdata
->bytes
);
1649 req
->Length
= cpu_to_le32(wdata
->bytes
);
1651 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1653 kref_get(&wdata
->refcount
);
1654 rc
= cifs_call_async(tcon
->ses
->server
, &rqst
, NULL
,
1655 smb2_writev_callback
, wdata
, 0);
1658 kref_put(&wdata
->refcount
, cifs_writedata_release
);
1661 cifs_small_buf_release(req
);
1666 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1667 * The length field from io_parms must be at least 1 and indicates a number of
1668 * elements with data to write that begins with position 1 in iov array. All
1669 * data length is specified by count.
1672 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1673 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1676 struct smb2_write_req
*req
= NULL
;
1677 struct smb2_write_rsp
*rsp
= NULL
;
1684 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1688 if (io_parms
->tcon
->ses
->server
== NULL
)
1689 return -ECONNABORTED
;
1691 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1693 req
->PersistentFileId
= io_parms
->persistent_fid
;
1694 req
->VolatileFileId
= io_parms
->volatile_fid
;
1695 req
->WriteChannelInfoOffset
= 0;
1696 req
->WriteChannelInfoLength
= 0;
1698 req
->Length
= cpu_to_le32(io_parms
->length
);
1699 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1700 /* 4 for rfc1002 length field */
1701 req
->DataOffset
= cpu_to_le16(
1702 offsetof(struct smb2_write_req
, Buffer
) - 4);
1703 req
->RemainingBytes
= 0;
1705 iov
[0].iov_base
= (char *)req
;
1706 /* 4 for rfc1002 length field and 1 for Buffer */
1707 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1709 /* length of entire message including data to be written */
1710 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1712 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
1716 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
1717 cERROR(1, "Send error in write = %d", rc
);
1719 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
1720 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1721 free_rsp_buf(resp_buftype
, rsp
);
1727 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
1730 unsigned int entrycount
= 0;
1731 unsigned int next_offset
= 0;
1732 FILE_DIRECTORY_INFO
*entryptr
;
1734 if (bufstart
== NULL
)
1737 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
1740 entryptr
= (FILE_DIRECTORY_INFO
*)
1741 ((char *)entryptr
+ next_offset
);
1743 if ((char *)entryptr
+ size
> end_of_buf
) {
1744 cERROR(1, "malformed search entry would overflow");
1748 len
= le32_to_cpu(entryptr
->FileNameLength
);
1749 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
1750 cERROR(1, "directory entry name would overflow frame "
1751 "end of buf %p", end_of_buf
);
1755 *lastentry
= (char *)entryptr
;
1758 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
1770 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
1771 u64 persistent_fid
, u64 volatile_fid
, int index
,
1772 struct cifs_search_info
*srch_inf
)
1774 struct smb2_query_directory_req
*req
;
1775 struct smb2_query_directory_rsp
*rsp
= NULL
;
1780 unsigned char *bufptr
;
1781 struct TCP_Server_Info
*server
;
1782 struct cifs_ses
*ses
= tcon
->ses
;
1783 __le16 asteriks
= cpu_to_le16('*');
1785 unsigned int output_size
= CIFSMaxBufSize
;
1786 size_t info_buf_size
;
1788 if (ses
&& (ses
->server
))
1789 server
= ses
->server
;
1793 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
1797 switch (srch_inf
->info_level
) {
1798 case SMB_FIND_FILE_DIRECTORY_INFO
:
1799 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
1800 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
1802 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
1803 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
1804 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
1807 cERROR(1, "info level %u isn't supported",
1808 srch_inf
->info_level
);
1813 req
->FileIndex
= cpu_to_le32(index
);
1814 req
->PersistentFileId
= persistent_fid
;
1815 req
->VolatileFileId
= volatile_fid
;
1818 bufptr
= req
->Buffer
;
1819 memcpy(bufptr
, &asteriks
, len
);
1821 req
->FileNameOffset
=
1822 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
1823 req
->FileNameLength
= cpu_to_le16(len
);
1825 * BB could be 30 bytes or so longer if we used SMB2 specific
1826 * buffer lengths, but this is safe and close enough.
1828 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
1829 output_size
= min_t(unsigned int, output_size
, 2 << 15);
1830 req
->OutputBufferLength
= cpu_to_le32(output_size
);
1832 iov
[0].iov_base
= (char *)req
;
1833 /* 4 for RFC1001 length and 1 for Buffer */
1834 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1836 iov
[1].iov_base
= (char *)(req
->Buffer
);
1837 iov
[1].iov_len
= len
;
1839 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
1841 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
1843 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
1846 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
1848 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1849 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
1854 srch_inf
->unicode
= true;
1856 if (srch_inf
->ntwrk_buf_start
) {
1857 if (srch_inf
->smallBuf
)
1858 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
1860 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
1862 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
1863 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
1864 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
1865 /* 4 for rfc1002 length field */
1866 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
1867 srch_inf
->entries_in_buffer
=
1868 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
1869 &srch_inf
->last_entry
, info_buf_size
);
1870 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
1871 cFYI(1, "num entries %d last_index %lld srch start %p srch end %p",
1872 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
1873 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
1874 if (resp_buftype
== CIFS_LARGE_BUFFER
)
1875 srch_inf
->smallBuf
= false;
1876 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
1877 srch_inf
->smallBuf
= true;
1879 cERROR(1, "illegal search buffer type");
1881 if (rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
)
1882 srch_inf
->endOfSearch
= 1;
1884 srch_inf
->endOfSearch
= 0;
1889 free_rsp_buf(resp_buftype
, rsp
);
1894 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1895 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
1896 unsigned int num
, void **data
, unsigned int *size
)
1898 struct smb2_set_info_req
*req
;
1899 struct smb2_set_info_rsp
*rsp
= NULL
;
1904 struct TCP_Server_Info
*server
;
1905 struct cifs_ses
*ses
= tcon
->ses
;
1907 if (ses
&& (ses
->server
))
1908 server
= ses
->server
;
1915 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
1919 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
1925 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
1927 req
->InfoType
= SMB2_O_INFO_FILE
;
1928 req
->FileInfoClass
= info_class
;
1929 req
->PersistentFileId
= persistent_fid
;
1930 req
->VolatileFileId
= volatile_fid
;
1932 /* 4 for RFC1001 length and 1 for Buffer */
1934 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
1935 req
->BufferLength
= cpu_to_le32(*size
);
1937 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
1939 memcpy(req
->Buffer
, *data
, *size
);
1941 iov
[0].iov_base
= (char *)req
;
1942 /* 4 for RFC1001 length */
1943 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1945 for (i
= 1; i
< num
; i
++) {
1946 inc_rfc1001_len(req
, size
[i
]);
1947 le32_add_cpu(&req
->BufferLength
, size
[i
]);
1948 iov
[i
].iov_base
= (char *)data
[i
];
1949 iov
[i
].iov_len
= size
[i
];
1952 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
1953 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
1956 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
1966 free_rsp_buf(resp_buftype
, rsp
);
1972 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
1973 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
1975 struct smb2_file_rename_info info
;
1977 unsigned int size
[2];
1979 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
1981 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
1985 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
1986 /* 0 = fail if target already exists */
1987 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
1988 info
.FileNameLength
= cpu_to_le32(len
);
1991 size
[0] = sizeof(struct smb2_file_rename_info
);
1993 data
[1] = target_file
;
1994 size
[1] = len
+ 2 /* null */;
1996 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1997 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2004 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2005 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2007 struct smb2_file_link_info info
;
2009 unsigned int size
[2];
2011 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2013 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2017 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2018 /* 0 = fail if link already exists */
2019 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2020 info
.FileNameLength
= cpu_to_le32(len
);
2023 size
[0] = sizeof(struct smb2_file_link_info
);
2025 data
[1] = target_file
;
2026 size
[1] = len
+ 2 /* null */;
2028 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2029 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2035 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2036 u64 volatile_fid
, u32 pid
, __le64
*eof
)
2038 struct smb2_file_eof_info info
;
2042 info
.EndOfFile
= *eof
;
2045 size
= sizeof(struct smb2_file_eof_info
);
2047 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
2048 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2052 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2053 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2056 size
= sizeof(FILE_BASIC_INFO
);
2057 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2058 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2059 (void **)&buf
, &size
);
2063 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2064 const u64 persistent_fid
, const u64 volatile_fid
,
2068 struct smb2_oplock_break
*req
= NULL
;
2070 cFYI(1, "SMB2_oplock_break");
2071 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2076 req
->VolatileFid
= volatile_fid
;
2077 req
->PersistentFid
= persistent_fid
;
2078 req
->OplockLevel
= oplock_level
;
2079 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2081 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2082 /* SMB2 buffer freed by function above */
2085 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2086 cFYI(1, "Send error in Oplock Break = %d", rc
);
2093 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2094 struct kstatfs
*kst
)
2096 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2097 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2098 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2099 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2100 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2105 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2106 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2109 struct smb2_query_info_req
*req
;
2111 cFYI(1, "Query FSInfo level %d", level
);
2113 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2116 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2120 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2121 req
->FileInfoClass
= level
;
2122 req
->PersistentFileId
= persistent_fid
;
2123 req
->VolatileFileId
= volatile_fid
;
2124 /* 4 for rfc1002 length field and 1 for pad */
2125 req
->InputBufferOffset
=
2126 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2127 req
->OutputBufferLength
= cpu_to_le32(
2128 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2130 iov
->iov_base
= (char *)req
;
2131 /* 4 for rfc1002 length field */
2132 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2137 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2138 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2140 struct smb2_query_info_rsp
*rsp
= NULL
;
2144 struct cifs_ses
*ses
= tcon
->ses
;
2145 struct smb2_fs_full_size_info
*info
= NULL
;
2147 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2148 sizeof(struct smb2_fs_full_size_info
),
2149 persistent_fid
, volatile_fid
);
2153 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2155 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2158 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2160 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2161 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2162 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2163 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2164 sizeof(struct smb2_fs_full_size_info
));
2166 copy_fs_info_to_kstatfs(info
, fsdata
);
2169 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2174 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2175 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2176 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2179 struct smb2_lock_req
*req
= NULL
;
2184 cFYI(1, "smb2_lockv num lock %d", num_lock
);
2186 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2190 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2191 req
->LockCount
= cpu_to_le16(num_lock
);
2193 req
->PersistentFileId
= persist_fid
;
2194 req
->VolatileFileId
= volatile_fid
;
2196 count
= num_lock
* sizeof(struct smb2_lock_element
);
2197 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2199 iov
[0].iov_base
= (char *)req
;
2200 /* 4 for rfc1002 length field and count for all locks */
2201 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2202 iov
[1].iov_base
= (char *)buf
;
2203 iov
[1].iov_len
= count
;
2205 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2206 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2208 cFYI(1, "Send error in smb2_lockv = %d", rc
);
2209 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2216 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2217 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2218 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2221 struct smb2_lock_element lock
;
2223 lock
.Offset
= cpu_to_le64(offset
);
2224 lock
.Length
= cpu_to_le64(length
);
2225 lock
.Flags
= cpu_to_le32(lock_flags
);
2226 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2227 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2229 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);