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
;
916 data_offset
= (char *)rsp
;
917 data_offset
+= 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
918 lc
= (struct create_lease
*)data_offset
;
920 char *name
= le16_to_cpu(lc
->ccontext
.NameOffset
) + (char *)lc
;
921 if (le16_to_cpu(lc
->ccontext
.NameLength
) != 4 ||
922 strncmp(name
, "RqLs", 4)) {
923 lc
= (struct create_lease
*)((char *)lc
924 + le32_to_cpu(lc
->ccontext
.Next
));
927 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS
)
928 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
931 } while (le32_to_cpu(lc
->ccontext
.Next
) != 0);
936 return smb2_map_lease_to_oplock(lc
->lcontext
.LeaseState
);
940 SMB2_open(const unsigned int xid
, struct cifs_tcon
*tcon
, __le16
*path
,
941 u64
*persistent_fid
, u64
*volatile_fid
, __u32 desired_access
,
942 __u32 create_disposition
, __u32 file_attributes
, __u32 create_options
,
943 __u8
*oplock
, struct smb2_file_all_info
*buf
)
945 struct smb2_create_req
*req
;
946 struct smb2_create_rsp
*rsp
;
947 struct TCP_Server_Info
*server
;
948 struct cifs_ses
*ses
= tcon
->ses
;
952 __le16
*copy_path
= NULL
;
957 cFYI(1, "create/open");
959 if (ses
&& (ses
->server
))
960 server
= ses
->server
;
964 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
968 req
->ImpersonationLevel
= IL_IMPERSONATION
;
969 req
->DesiredAccess
= cpu_to_le32(desired_access
);
970 /* File attributes ignored on open (used in create though) */
971 req
->FileAttributes
= cpu_to_le32(file_attributes
);
972 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
973 req
->CreateDisposition
= cpu_to_le32(create_disposition
);
974 req
->CreateOptions
= cpu_to_le32(create_options
);
975 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
976 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
)
977 - 8 /* pad */ - 4 /* do not count rfc1001 len field */);
979 iov
[0].iov_base
= (char *)req
;
980 /* 4 for rfc1002 length field */
981 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
983 /* MUST set path len (NameLength) to 0 opening root of share */
984 if (uni_path_len
>= 4) {
985 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
986 /* -1 since last byte is buf[0] which is sent below (path) */
988 if (uni_path_len
% 8 != 0) {
989 copy_size
= uni_path_len
/ 8 * 8;
990 if (copy_size
< uni_path_len
)
993 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
996 memcpy((char *)copy_path
, (const char *)path
,
998 uni_path_len
= copy_size
;
1002 iov
[1].iov_len
= uni_path_len
;
1003 iov
[1].iov_base
= path
;
1005 * -1 since last byte is buf[0] which was counted in
1008 inc_rfc1001_len(req
, uni_path_len
- 1);
1010 iov
[0].iov_len
+= 7;
1011 req
->hdr
.smb2_buf_length
= cpu_to_be32(be32_to_cpu(
1012 req
->hdr
.smb2_buf_length
) + 8 - 1);
1014 req
->NameLength
= 0;
1017 if (!server
->oplocks
)
1018 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1020 if (!(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1021 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1022 req
->RequestedOplockLevel
= *oplock
;
1024 iov
[num_iovecs
].iov_base
= create_lease_buf(oplock
+1, *oplock
);
1025 if (iov
[num_iovecs
].iov_base
== NULL
) {
1026 cifs_small_buf_release(req
);
1030 iov
[num_iovecs
].iov_len
= sizeof(struct create_lease
);
1031 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1032 req
->CreateContextsOffset
= cpu_to_le32(
1033 sizeof(struct smb2_create_req
) - 4 - 8 +
1034 iov
[num_iovecs
-1].iov_len
);
1035 req
->CreateContextsLength
= cpu_to_le32(
1036 sizeof(struct create_lease
));
1037 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_lease
));
1041 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1042 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
1045 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1053 *persistent_fid
= rsp
->PersistentFileId
;
1054 *volatile_fid
= rsp
->VolatileFileId
;
1057 memcpy(buf
, &rsp
->CreationTime
, 32);
1058 buf
->AllocationSize
= rsp
->AllocationSize
;
1059 buf
->EndOfFile
= rsp
->EndofFile
;
1060 buf
->Attributes
= rsp
->FileAttributes
;
1061 buf
->NumberOfLinks
= cpu_to_le32(1);
1062 buf
->DeletePending
= 0;
1065 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1066 *oplock
= parse_lease_state(rsp
);
1068 *oplock
= rsp
->OplockLevel
;
1071 free_rsp_buf(resp_buftype
, rsp
);
1076 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1077 u64 persistent_fid
, u64 volatile_fid
)
1079 struct smb2_close_req
*req
;
1080 struct smb2_close_rsp
*rsp
;
1081 struct TCP_Server_Info
*server
;
1082 struct cifs_ses
*ses
= tcon
->ses
;
1089 if (ses
&& (ses
->server
))
1090 server
= ses
->server
;
1094 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1098 req
->PersistentFileId
= persistent_fid
;
1099 req
->VolatileFileId
= volatile_fid
;
1101 iov
[0].iov_base
= (char *)req
;
1102 /* 4 for rfc1002 length field */
1103 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1105 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1106 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1110 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1119 /* BB FIXME - decode close response, update inode for caching */
1122 free_rsp_buf(resp_buftype
, rsp
);
1127 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1128 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1131 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1132 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1133 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1134 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1137 if (buffer_length
< min_buf_size
) {
1138 cERROR(1, "buffer length %d smaller than minimum size %d",
1139 buffer_length
, min_buf_size
);
1143 /* check if beyond RFC1001 maximum length */
1144 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1145 cERROR(1, "buffer length %d or smb length %d too large",
1146 buffer_length
, smb_len
);
1150 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1151 cERROR(1, "illegal server response, bad offset to data");
1159 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1160 * Caller must free buffer.
1163 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1164 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1168 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1174 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1178 memcpy(data
, begin_of_buf
, buffer_length
);
1184 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1185 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1186 size_t output_len
, size_t min_len
, void *data
)
1188 struct smb2_query_info_req
*req
;
1189 struct smb2_query_info_rsp
*rsp
= NULL
;
1193 struct TCP_Server_Info
*server
;
1194 struct cifs_ses
*ses
= tcon
->ses
;
1196 cFYI(1, "Query Info");
1198 if (ses
&& (ses
->server
))
1199 server
= ses
->server
;
1203 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1207 req
->InfoType
= SMB2_O_INFO_FILE
;
1208 req
->FileInfoClass
= info_class
;
1209 req
->PersistentFileId
= persistent_fid
;
1210 req
->VolatileFileId
= volatile_fid
;
1211 /* 4 for rfc1002 length field and 1 for Buffer */
1212 req
->InputBufferOffset
=
1213 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1214 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1216 iov
[0].iov_base
= (char *)req
;
1217 /* 4 for rfc1002 length field */
1218 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1220 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1221 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1224 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1228 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1229 le32_to_cpu(rsp
->OutputBufferLength
),
1230 &rsp
->hdr
, min_len
, data
);
1233 free_rsp_buf(resp_buftype
, rsp
);
1238 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1239 u64 persistent_fid
, u64 volatile_fid
,
1240 struct smb2_file_all_info
*data
)
1242 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1243 FILE_ALL_INFORMATION
,
1244 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1245 sizeof(struct smb2_file_all_info
), data
);
1249 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1250 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1252 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1253 FILE_INTERNAL_INFORMATION
,
1254 sizeof(struct smb2_file_internal_info
),
1255 sizeof(struct smb2_file_internal_info
), uniqueid
);
1259 * This is a no-op for now. We're not really interested in the reply, but
1260 * rather in the fact that the server sent one and that server->lstrp
1263 * FIXME: maybe we should consider checking that the reply matches request?
1266 smb2_echo_callback(struct mid_q_entry
*mid
)
1268 struct TCP_Server_Info
*server
= mid
->callback_data
;
1269 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1270 unsigned int credits_received
= 1;
1272 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1273 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1275 DeleteMidQEntry(mid
);
1276 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1280 SMB2_echo(struct TCP_Server_Info
*server
)
1282 struct smb2_echo_req
*req
;
1285 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1288 cFYI(1, "In echo request");
1290 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1294 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1296 iov
.iov_base
= (char *)req
;
1297 /* 4 for rfc1002 length field */
1298 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1300 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1303 cFYI(1, "Echo request failed: %d", rc
);
1305 cifs_small_buf_release(req
);
1310 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1313 struct smb2_flush_req
*req
;
1314 struct TCP_Server_Info
*server
;
1315 struct cifs_ses
*ses
= tcon
->ses
;
1322 if (ses
&& (ses
->server
))
1323 server
= ses
->server
;
1327 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1331 req
->PersistentFileId
= persistent_fid
;
1332 req
->VolatileFileId
= volatile_fid
;
1334 iov
[0].iov_base
= (char *)req
;
1335 /* 4 for rfc1002 length field */
1336 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1338 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1340 if ((rc
!= 0) && tcon
)
1341 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1343 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1348 * To form a chain of read requests, any read requests after the first should
1349 * have the end_of_chain boolean set to true.
1352 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1353 unsigned int remaining_bytes
, int request_type
)
1356 struct smb2_read_req
*req
= NULL
;
1358 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1361 if (io_parms
->tcon
->ses
->server
== NULL
)
1362 return -ECONNABORTED
;
1364 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1366 req
->PersistentFileId
= io_parms
->persistent_fid
;
1367 req
->VolatileFileId
= io_parms
->volatile_fid
;
1368 req
->ReadChannelInfoOffset
= 0; /* reserved */
1369 req
->ReadChannelInfoLength
= 0; /* reserved */
1370 req
->Channel
= 0; /* reserved */
1371 req
->MinimumCount
= 0;
1372 req
->Length
= cpu_to_le32(io_parms
->length
);
1373 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1375 if (request_type
& CHAINED_REQUEST
) {
1376 if (!(request_type
& END_OF_CHAIN
)) {
1377 /* 4 for rfc1002 length field */
1378 req
->hdr
.NextCommand
=
1379 cpu_to_le32(get_rfc1002_length(req
) + 4);
1380 } else /* END_OF_CHAIN */
1381 req
->hdr
.NextCommand
= 0;
1382 if (request_type
& RELATED_REQUEST
) {
1383 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1385 * Related requests use info from previous read request
1388 req
->hdr
.SessionId
= 0xFFFFFFFF;
1389 req
->hdr
.TreeId
= 0xFFFFFFFF;
1390 req
->PersistentFileId
= 0xFFFFFFFF;
1391 req
->VolatileFileId
= 0xFFFFFFFF;
1394 if (remaining_bytes
> io_parms
->length
)
1395 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1397 req
->RemainingBytes
= 0;
1399 iov
[0].iov_base
= (char *)req
;
1400 /* 4 for rfc1002 length field */
1401 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1406 smb2_readv_callback(struct mid_q_entry
*mid
)
1408 struct cifs_readdata
*rdata
= mid
->callback_data
;
1409 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1410 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1411 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1412 unsigned int credits_received
= 1;
1413 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1415 .rq_pages
= rdata
->pages
,
1416 .rq_npages
= rdata
->nr_pages
,
1417 .rq_pagesz
= rdata
->pagesz
,
1418 .rq_tailsz
= rdata
->tailsz
};
1420 cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __func__
,
1421 mid
->mid
, mid
->mid_state
, rdata
->result
, rdata
->bytes
);
1423 switch (mid
->mid_state
) {
1424 case MID_RESPONSE_RECEIVED
:
1425 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1426 /* result already set, check signature */
1427 if (server
->sec_mode
&
1428 (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
)) {
1431 rc
= smb2_verify_signature(&rqst
, server
);
1433 cERROR(1, "SMB signature verification returned "
1436 /* FIXME: should this be counted toward the initiating task? */
1437 task_io_account_read(rdata
->bytes
);
1438 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1440 case MID_REQUEST_SUBMITTED
:
1441 case MID_RETRY_NEEDED
:
1442 rdata
->result
= -EAGAIN
;
1445 if (rdata
->result
!= -ENODATA
)
1446 rdata
->result
= -EIO
;
1450 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1452 queue_work(cifsiod_wq
, &rdata
->work
);
1453 DeleteMidQEntry(mid
);
1454 add_credits(server
, credits_received
, 0);
1457 /* smb2_async_readv - send an async write, and set up mid to handle result */
1459 smb2_async_readv(struct cifs_readdata
*rdata
)
1462 struct smb2_hdr
*buf
;
1463 struct cifs_io_parms io_parms
;
1464 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1467 cFYI(1, "%s: offset=%llu bytes=%u", __func__
,
1468 rdata
->offset
, rdata
->bytes
);
1470 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1471 io_parms
.offset
= rdata
->offset
;
1472 io_parms
.length
= rdata
->bytes
;
1473 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1474 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1475 io_parms
.pid
= rdata
->pid
;
1476 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1480 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1481 /* 4 for rfc1002 length field */
1482 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1484 kref_get(&rdata
->refcount
);
1485 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1486 cifs_readv_receive
, smb2_readv_callback
,
1489 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1490 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1493 cifs_small_buf_release(buf
);
1498 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1499 unsigned int *nbytes
, char **buf
, int *buf_type
)
1501 int resp_buftype
, rc
= -EACCES
;
1502 struct smb2_read_rsp
*rsp
= NULL
;
1506 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1510 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1511 &resp_buftype
, CIFS_LOG_ERROR
);
1513 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1515 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1516 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1521 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1522 cERROR(1, "Send error in read = %d", rc
);
1524 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1525 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1526 (*nbytes
> io_parms
->length
)) {
1527 cFYI(1, "bad length %d for count %d", *nbytes
,
1535 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1537 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1538 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1539 *buf
= iov
[0].iov_base
;
1540 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1541 *buf_type
= CIFS_SMALL_BUFFER
;
1542 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1543 *buf_type
= CIFS_LARGE_BUFFER
;
1549 * Check the mid_state and signature on received buffer (if any), and queue the
1550 * workqueue completion task.
1553 smb2_writev_callback(struct mid_q_entry
*mid
)
1555 struct cifs_writedata
*wdata
= mid
->callback_data
;
1556 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1557 unsigned int written
;
1558 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1559 unsigned int credits_received
= 1;
1561 switch (mid
->mid_state
) {
1562 case MID_RESPONSE_RECEIVED
:
1563 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1564 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1565 if (wdata
->result
!= 0)
1568 written
= le32_to_cpu(rsp
->DataLength
);
1570 * Mask off high 16 bits when bytes written as returned
1571 * by the server is greater than bytes requested by the
1572 * client. OS/2 servers are known to set incorrect
1575 if (written
> wdata
->bytes
)
1578 if (written
< wdata
->bytes
)
1579 wdata
->result
= -ENOSPC
;
1581 wdata
->bytes
= written
;
1583 case MID_REQUEST_SUBMITTED
:
1584 case MID_RETRY_NEEDED
:
1585 wdata
->result
= -EAGAIN
;
1588 wdata
->result
= -EIO
;
1593 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1595 queue_work(cifsiod_wq
, &wdata
->work
);
1596 DeleteMidQEntry(mid
);
1597 add_credits(tcon
->ses
->server
, credits_received
, 0);
1600 /* smb2_async_writev - send an async write, and set up mid to handle result */
1602 smb2_async_writev(struct cifs_writedata
*wdata
)
1605 struct smb2_write_req
*req
= NULL
;
1606 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1608 struct smb_rqst rqst
;
1610 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1612 goto async_writev_out
;
1614 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1616 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1617 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1618 req
->WriteChannelInfoOffset
= 0;
1619 req
->WriteChannelInfoLength
= 0;
1621 req
->Offset
= cpu_to_le64(wdata
->offset
);
1622 /* 4 for rfc1002 length field */
1623 req
->DataOffset
= cpu_to_le16(
1624 offsetof(struct smb2_write_req
, Buffer
) - 4);
1625 req
->RemainingBytes
= 0;
1627 /* 4 for rfc1002 length field and 1 for Buffer */
1628 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1633 rqst
.rq_pages
= wdata
->pages
;
1634 rqst
.rq_npages
= wdata
->nr_pages
;
1635 rqst
.rq_pagesz
= wdata
->pagesz
;
1636 rqst
.rq_tailsz
= wdata
->tailsz
;
1638 cFYI(1, "async write at %llu %u bytes", wdata
->offset
, wdata
->bytes
);
1640 req
->Length
= cpu_to_le32(wdata
->bytes
);
1642 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1644 kref_get(&wdata
->refcount
);
1645 rc
= cifs_call_async(tcon
->ses
->server
, &rqst
, NULL
,
1646 smb2_writev_callback
, wdata
, 0);
1649 kref_put(&wdata
->refcount
, cifs_writedata_release
);
1650 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1654 cifs_small_buf_release(req
);
1659 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1660 * The length field from io_parms must be at least 1 and indicates a number of
1661 * elements with data to write that begins with position 1 in iov array. All
1662 * data length is specified by count.
1665 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1666 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1669 struct smb2_write_req
*req
= NULL
;
1670 struct smb2_write_rsp
*rsp
= NULL
;
1677 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1681 if (io_parms
->tcon
->ses
->server
== NULL
)
1682 return -ECONNABORTED
;
1684 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1686 req
->PersistentFileId
= io_parms
->persistent_fid
;
1687 req
->VolatileFileId
= io_parms
->volatile_fid
;
1688 req
->WriteChannelInfoOffset
= 0;
1689 req
->WriteChannelInfoLength
= 0;
1691 req
->Length
= cpu_to_le32(io_parms
->length
);
1692 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1693 /* 4 for rfc1002 length field */
1694 req
->DataOffset
= cpu_to_le16(
1695 offsetof(struct smb2_write_req
, Buffer
) - 4);
1696 req
->RemainingBytes
= 0;
1698 iov
[0].iov_base
= (char *)req
;
1699 /* 4 for rfc1002 length field and 1 for Buffer */
1700 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1702 /* length of entire message including data to be written */
1703 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1705 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
1707 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
1710 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
1711 cERROR(1, "Send error in write = %d", rc
);
1713 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1715 free_rsp_buf(resp_buftype
, rsp
);
1720 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
1723 unsigned int entrycount
= 0;
1724 unsigned int next_offset
= 0;
1725 FILE_DIRECTORY_INFO
*entryptr
;
1727 if (bufstart
== NULL
)
1730 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
1733 entryptr
= (FILE_DIRECTORY_INFO
*)
1734 ((char *)entryptr
+ next_offset
);
1736 if ((char *)entryptr
+ size
> end_of_buf
) {
1737 cERROR(1, "malformed search entry would overflow");
1741 len
= le32_to_cpu(entryptr
->FileNameLength
);
1742 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
1743 cERROR(1, "directory entry name would overflow frame "
1744 "end of buf %p", end_of_buf
);
1748 *lastentry
= (char *)entryptr
;
1751 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
1763 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
1764 u64 persistent_fid
, u64 volatile_fid
, int index
,
1765 struct cifs_search_info
*srch_inf
)
1767 struct smb2_query_directory_req
*req
;
1768 struct smb2_query_directory_rsp
*rsp
= NULL
;
1773 unsigned char *bufptr
;
1774 struct TCP_Server_Info
*server
;
1775 struct cifs_ses
*ses
= tcon
->ses
;
1776 __le16 asteriks
= cpu_to_le16('*');
1778 unsigned int output_size
= CIFSMaxBufSize
;
1779 size_t info_buf_size
;
1781 if (ses
&& (ses
->server
))
1782 server
= ses
->server
;
1786 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
1790 switch (srch_inf
->info_level
) {
1791 case SMB_FIND_FILE_DIRECTORY_INFO
:
1792 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
1793 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
1795 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
1796 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
1797 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
1800 cERROR(1, "info level %u isn't supported",
1801 srch_inf
->info_level
);
1806 req
->FileIndex
= cpu_to_le32(index
);
1807 req
->PersistentFileId
= persistent_fid
;
1808 req
->VolatileFileId
= volatile_fid
;
1811 bufptr
= req
->Buffer
;
1812 memcpy(bufptr
, &asteriks
, len
);
1814 req
->FileNameOffset
=
1815 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
1816 req
->FileNameLength
= cpu_to_le16(len
);
1818 * BB could be 30 bytes or so longer if we used SMB2 specific
1819 * buffer lengths, but this is safe and close enough.
1821 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
1822 output_size
= min_t(unsigned int, output_size
, 2 << 15);
1823 req
->OutputBufferLength
= cpu_to_le32(output_size
);
1825 iov
[0].iov_base
= (char *)req
;
1826 /* 4 for RFC1001 length and 1 for Buffer */
1827 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1829 iov
[1].iov_base
= (char *)(req
->Buffer
);
1830 iov
[1].iov_len
= len
;
1832 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
1834 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
1835 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
1838 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
1842 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1843 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
1848 srch_inf
->unicode
= true;
1850 if (srch_inf
->ntwrk_buf_start
) {
1851 if (srch_inf
->smallBuf
)
1852 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
1854 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
1856 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
1857 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
1858 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
1859 /* 4 for rfc1002 length field */
1860 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
1861 srch_inf
->entries_in_buffer
=
1862 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
1863 &srch_inf
->last_entry
, info_buf_size
);
1864 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
1865 cFYI(1, "num entries %d last_index %lld srch start %p srch end %p",
1866 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
1867 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
1868 if (resp_buftype
== CIFS_LARGE_BUFFER
)
1869 srch_inf
->smallBuf
= false;
1870 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
1871 srch_inf
->smallBuf
= true;
1873 cERROR(1, "illegal search buffer type");
1875 if (rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
)
1876 srch_inf
->endOfSearch
= 1;
1878 srch_inf
->endOfSearch
= 0;
1883 free_rsp_buf(resp_buftype
, rsp
);
1888 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1889 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
1890 unsigned int num
, void **data
, unsigned int *size
)
1892 struct smb2_set_info_req
*req
;
1893 struct smb2_set_info_rsp
*rsp
= NULL
;
1898 struct TCP_Server_Info
*server
;
1899 struct cifs_ses
*ses
= tcon
->ses
;
1901 if (ses
&& (ses
->server
))
1902 server
= ses
->server
;
1909 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
1913 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
1919 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
1921 req
->InfoType
= SMB2_O_INFO_FILE
;
1922 req
->FileInfoClass
= info_class
;
1923 req
->PersistentFileId
= persistent_fid
;
1924 req
->VolatileFileId
= volatile_fid
;
1926 /* 4 for RFC1001 length and 1 for Buffer */
1928 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
1929 req
->BufferLength
= cpu_to_le32(*size
);
1931 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
1933 memcpy(req
->Buffer
, *data
, *size
);
1935 iov
[0].iov_base
= (char *)req
;
1936 /* 4 for RFC1001 length */
1937 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1939 for (i
= 1; i
< num
; i
++) {
1940 inc_rfc1001_len(req
, size
[i
]);
1941 le32_add_cpu(&req
->BufferLength
, size
[i
]);
1942 iov
[i
].iov_base
= (char *)data
[i
];
1943 iov
[i
].iov_len
= size
[i
];
1946 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
1947 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
1950 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
1960 free_rsp_buf(resp_buftype
, rsp
);
1966 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
1967 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
1969 struct smb2_file_rename_info info
;
1971 unsigned int size
[2];
1973 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
1975 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
1979 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
1980 /* 0 = fail if target already exists */
1981 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
1982 info
.FileNameLength
= cpu_to_le32(len
);
1985 size
[0] = sizeof(struct smb2_file_rename_info
);
1987 data
[1] = target_file
;
1988 size
[1] = len
+ 2 /* null */;
1990 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1991 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
1998 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
1999 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2001 struct smb2_file_link_info info
;
2003 unsigned int size
[2];
2005 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2007 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2011 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2012 /* 0 = fail if link already exists */
2013 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2014 info
.FileNameLength
= cpu_to_le32(len
);
2017 size
[0] = sizeof(struct smb2_file_link_info
);
2019 data
[1] = target_file
;
2020 size
[1] = len
+ 2 /* null */;
2022 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2023 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2029 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2030 u64 volatile_fid
, u32 pid
, __le64
*eof
)
2032 struct smb2_file_eof_info info
;
2036 info
.EndOfFile
= *eof
;
2039 size
= sizeof(struct smb2_file_eof_info
);
2041 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
2042 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2046 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2047 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2050 size
= sizeof(FILE_BASIC_INFO
);
2051 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2052 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2053 (void **)&buf
, &size
);
2057 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2058 const u64 persistent_fid
, const u64 volatile_fid
,
2062 struct smb2_oplock_break
*req
= NULL
;
2064 cFYI(1, "SMB2_oplock_break");
2065 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2070 req
->VolatileFid
= volatile_fid
;
2071 req
->PersistentFid
= persistent_fid
;
2072 req
->OplockLevel
= oplock_level
;
2073 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2075 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2076 /* SMB2 buffer freed by function above */
2079 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2080 cFYI(1, "Send error in Oplock Break = %d", rc
);
2087 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2088 struct kstatfs
*kst
)
2090 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2091 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2092 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2093 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2094 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2099 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2100 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2103 struct smb2_query_info_req
*req
;
2105 cFYI(1, "Query FSInfo level %d", level
);
2107 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2110 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2114 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2115 req
->FileInfoClass
= level
;
2116 req
->PersistentFileId
= persistent_fid
;
2117 req
->VolatileFileId
= volatile_fid
;
2118 /* 4 for rfc1002 length field and 1 for pad */
2119 req
->InputBufferOffset
=
2120 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2121 req
->OutputBufferLength
= cpu_to_le32(
2122 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2124 iov
->iov_base
= (char *)req
;
2125 /* 4 for rfc1002 length field */
2126 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2131 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2132 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2134 struct smb2_query_info_rsp
*rsp
= NULL
;
2138 struct cifs_ses
*ses
= tcon
->ses
;
2139 struct smb2_fs_full_size_info
*info
= NULL
;
2141 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2142 sizeof(struct smb2_fs_full_size_info
),
2143 persistent_fid
, volatile_fid
);
2147 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2149 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2152 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2154 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2155 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2156 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2157 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2158 sizeof(struct smb2_fs_full_size_info
));
2160 copy_fs_info_to_kstatfs(info
, fsdata
);
2163 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2168 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2169 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2170 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2173 struct smb2_lock_req
*req
= NULL
;
2178 cFYI(1, "smb2_lockv num lock %d", num_lock
);
2180 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2184 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2185 req
->LockCount
= cpu_to_le16(num_lock
);
2187 req
->PersistentFileId
= persist_fid
;
2188 req
->VolatileFileId
= volatile_fid
;
2190 count
= num_lock
* sizeof(struct smb2_lock_element
);
2191 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2193 iov
[0].iov_base
= (char *)req
;
2194 /* 4 for rfc1002 length field and count for all locks */
2195 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2196 iov
[1].iov_base
= (char *)buf
;
2197 iov
[1].iov_len
= count
;
2199 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2200 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2202 cFYI(1, "Send error in smb2_lockv = %d", rc
);
2203 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2210 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2211 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2212 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2215 struct smb2_lock_element lock
;
2217 lock
.Offset
= cpu_to_le64(offset
);
2218 lock
.Length
= cpu_to_le64(length
);
2219 lock
.Flags
= cpu_to_le32(lock_flags
);
2220 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2221 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2223 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2227 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2228 __u8
*lease_key
, const __le32 lease_state
)
2231 struct smb2_lease_ack
*req
= NULL
;
2233 cFYI(1, "SMB2_lease_break");
2234 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2239 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2240 req
->StructureSize
= cpu_to_le16(36);
2241 inc_rfc1001_len(req
, 12);
2243 memcpy(req
->LeaseKey
, lease_key
, 16);
2244 req
->LeaseState
= lease_state
;
2246 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2247 /* SMB2 buffer freed by function above */
2250 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2251 cFYI(1, "Send error in Lease Break = %d", rc
);