4 * Copyright (C) International Business Machines Corp., 2009, 2012
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
9 * Contains the routines for constructing the SMB2 PDUs themselves
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
32 #include <linux/kernel.h>
33 #include <linux/vfs.h>
34 #include <linux/task_io_accounting_ops.h>
35 #include <linux/uaccess.h>
36 #include <linux/pagemap.h>
37 #include <linux/xattr.h>
41 #include "cifsproto.h"
42 #include "smb2proto.h"
43 #include "cifs_unicode.h"
44 #include "cifs_debug.h"
46 #include "smb2status.h"
51 * The following table defines the expected "StructureSize" of SMB2 requests
52 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
54 * Note that commands are defined in smb2pdu.h in le16 but the array below is
55 * indexed by command in host byte order.
57 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
58 /* SMB2_NEGOTIATE */ 36,
59 /* SMB2_SESSION_SETUP */ 25,
61 /* SMB2_TREE_CONNECT */ 9,
62 /* SMB2_TREE_DISCONNECT */ 4,
72 /* SMB2_QUERY_DIRECTORY */ 33,
73 /* SMB2_CHANGE_NOTIFY */ 32,
74 /* SMB2_QUERY_INFO */ 41,
75 /* SMB2_SET_INFO */ 33,
76 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
81 smb2_hdr_assemble(struct smb2_hdr
*hdr
, __le16 smb2_cmd
/* command */ ,
82 const struct cifs_tcon
*tcon
)
84 struct smb2_pdu
*pdu
= (struct smb2_pdu
*)hdr
;
85 char *temp
= (char *)hdr
;
86 /* lookup word count ie StructureSize from table */
87 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_cmd
)];
90 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
91 * largest operations (Create)
95 /* Note this is only network field converted to big endian */
96 hdr
->smb2_buf_length
= cpu_to_be32(parmsize
+ sizeof(struct smb2_hdr
)
97 - 4 /* RFC 1001 length field itself not counted */);
99 hdr
->ProtocolId
[0] = 0xFE;
100 hdr
->ProtocolId
[1] = 'S';
101 hdr
->ProtocolId
[2] = 'M';
102 hdr
->ProtocolId
[3] = 'B';
103 hdr
->StructureSize
= cpu_to_le16(64);
104 hdr
->Command
= smb2_cmd
;
105 hdr
->CreditRequest
= cpu_to_le16(2); /* BB make this dynamic */
106 hdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
111 hdr
->TreeId
= tcon
->tid
;
112 /* Uid is not converted */
114 hdr
->SessionId
= tcon
->ses
->Suid
;
115 /* BB check following DFS flags BB */
116 /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */
117 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
)
118 hdr
->Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
119 /* BB how does SMB2 do case sensitive? */
121 hdr->Flags |= SMBFLG_CASELESS; */
122 if (tcon
->ses
&& tcon
->ses
->server
&&
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 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
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 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
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 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", 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
);
310 * SMB2 Worker functions follow:
312 * The general structure of the worker functions is:
313 * 1) Call smb2_init (assembles SMB2 header)
314 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
315 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
316 * 4) Decode SMB2 command specific fields in the fixed length area
317 * 5) Decode variable length data area (if any for this SMB2 command type)
318 * 6) Call free smb buffer
324 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
326 struct smb2_negotiate_req
*req
;
327 struct smb2_negotiate_rsp
*rsp
;
331 struct TCP_Server_Info
*server
;
332 unsigned int sec_flags
;
334 int blob_offset
, blob_length
;
336 int flags
= CIFS_NEG_OP
;
338 cifs_dbg(FYI
, "Negotiate protocol\n");
341 server
= ses
->server
;
347 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
351 /* if any of auth flags (ie not sign or seal) are overriden use them */
352 if (ses
->overrideSecFlg
& (~(CIFSSEC_MUST_SIGN
| CIFSSEC_MUST_SEAL
)))
353 sec_flags
= ses
->overrideSecFlg
; /* BB FIXME fix sign flags?*/
354 else /* if override flags set only sign/seal OR them with global auth */
355 sec_flags
= global_secflags
| ses
->overrideSecFlg
;
357 cifs_dbg(FYI
, "sec_flags 0x%x\n", sec_flags
);
359 req
->hdr
.SessionId
= 0;
361 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
363 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
364 inc_rfc1001_len(req
, 2);
366 /* only one of SMB2 signing flags may be set in SMB2 request */
367 if ((sec_flags
& CIFSSEC_MUST_SIGN
) == CIFSSEC_MUST_SIGN
)
368 temp
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
369 else if (sec_flags
& CIFSSEC_MAY_SIGN
) /* MAY_SIGN is a single flag */
370 temp
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
372 req
->SecurityMode
= cpu_to_le16(temp
);
374 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
376 memcpy(req
->ClientGUID
, cifs_client_guid
, SMB2_CLIENT_GUID_SIZE
);
378 iov
[0].iov_base
= (char *)req
;
379 /* 4 for rfc1002 length field */
380 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
382 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
);
384 rsp
= (struct smb2_negotiate_rsp
*)iov
[0].iov_base
;
386 * No tcon so can't do
387 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
392 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
394 /* BB we may eventually want to match the negotiated vs. requested
395 dialect, even though we are only requesting one at a time */
396 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
397 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
398 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
399 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
400 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
401 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
403 cifs_dbg(VFS
, "Illegal dialect returned by server %d\n",
404 le16_to_cpu(rsp
->DialectRevision
));
408 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
410 server
->maxBuf
= le32_to_cpu(rsp
->MaxTransactSize
);
411 /* set it to the maximum buffer size value we can send with 1 credit */
412 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
413 SMB2_MAX_BUFFER_SIZE
);
414 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
415 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
416 /* BB Do we need to validate the SecurityMode? */
417 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
418 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
420 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
422 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
424 if (blob_length
== 0) {
425 cifs_dbg(VFS
, "missing security blob on negprot\n");
430 cifs_dbg(FYI
, "sec_flags 0x%x\n", sec_flags
);
431 if ((sec_flags
& CIFSSEC_MUST_SIGN
) == CIFSSEC_MUST_SIGN
) {
432 cifs_dbg(FYI
, "Signing required\n");
433 if (!(server
->sec_mode
& (SMB2_NEGOTIATE_SIGNING_REQUIRED
|
434 SMB2_NEGOTIATE_SIGNING_ENABLED
))) {
435 cifs_dbg(VFS
, "signing required but server lacks support\n");
439 server
->sec_mode
|= SECMODE_SIGN_REQUIRED
;
440 } else if (sec_flags
& CIFSSEC_MAY_SIGN
) {
441 cifs_dbg(FYI
, "Signing optional\n");
442 if (server
->sec_mode
& SMB2_NEGOTIATE_SIGNING_REQUIRED
) {
443 cifs_dbg(FYI
, "Server requires signing\n");
444 server
->sec_mode
|= SECMODE_SIGN_REQUIRED
;
447 ~(SECMODE_SIGN_ENABLED
| SECMODE_SIGN_REQUIRED
);
450 cifs_dbg(FYI
, "Signing disabled\n");
451 if (server
->sec_mode
& SMB2_NEGOTIATE_SIGNING_REQUIRED
) {
452 cifs_dbg(VFS
, "Server requires packet signing to be enabled in /proc/fs/cifs/SecurityFlags\n");
457 ~(SECMODE_SIGN_ENABLED
| SECMODE_SIGN_REQUIRED
);
460 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
461 rc
= decode_neg_token_init(security_blob
, blob_length
,
472 free_rsp_buf(resp_buftype
, rsp
);
477 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
478 const struct nls_table
*nls_cp
)
480 struct smb2_sess_setup_req
*req
;
481 struct smb2_sess_setup_rsp
*rsp
= NULL
;
485 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
486 struct TCP_Server_Info
*server
;
487 unsigned int sec_flags
;
491 char *ntlmssp_blob
= NULL
;
492 bool use_spnego
= false; /* else use raw ntlmssp */
494 cifs_dbg(FYI
, "Session Setup\n");
497 server
= ses
->server
;
504 * If memory allocation is successful, caller of this function
507 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
511 ses
->server
->secType
= RawNTLMSSP
;
513 ssetup_ntlmssp_authenticate
:
514 if (phase
== NtLmChallenge
)
515 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
517 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
521 /* if any of auth flags (ie not sign or seal) are overriden use them */
522 if (ses
->overrideSecFlg
& (~(CIFSSEC_MUST_SIGN
| CIFSSEC_MUST_SEAL
)))
523 sec_flags
= ses
->overrideSecFlg
; /* BB FIXME fix sign flags?*/
524 else /* if override flags set only sign/seal OR them with global auth */
525 sec_flags
= global_secflags
| ses
->overrideSecFlg
;
527 cifs_dbg(FYI
, "sec_flags 0x%x\n", sec_flags
);
529 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
530 req
->VcNumber
= 0; /* MBZ */
531 /* to enable echos and oplocks */
532 req
->hdr
.CreditRequest
= cpu_to_le16(3);
534 /* only one of SMB2 signing flags may be set in SMB2 request */
535 if ((sec_flags
& CIFSSEC_MUST_SIGN
) == CIFSSEC_MUST_SIGN
)
536 temp
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
537 else if (ses
->server
->sec_mode
& SMB2_NEGOTIATE_SIGNING_REQUIRED
)
538 temp
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
539 else if (sec_flags
& CIFSSEC_MAY_SIGN
) /* MAY_SIGN is a single flag */
540 temp
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
542 req
->SecurityMode
= temp
;
543 req
->Capabilities
= 0;
544 req
->Channel
= 0; /* MBZ */
546 iov
[0].iov_base
= (char *)req
;
547 /* 4 for rfc1002 length field and 1 for pad */
548 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
549 if (phase
== NtLmNegotiate
) {
550 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
552 if (ntlmssp_blob
== NULL
) {
556 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
558 /* blob_length = build_spnego_ntlmssp_blob(
560 sizeof(struct _NEGOTIATE_MESSAGE),
562 /* BB eventually need to add this */
563 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
568 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
569 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
570 security_blob
= ntlmssp_blob
;
572 } else if (phase
== NtLmAuthenticate
) {
573 req
->hdr
.SessionId
= ses
->Suid
;
574 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
576 if (ntlmssp_blob
== NULL
) {
580 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
583 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n",
585 goto ssetup_exit
; /* BB double check error handling */
588 /* blob_length = build_spnego_ntlmssp_blob(
592 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
597 security_blob
= ntlmssp_blob
;
600 cifs_dbg(VFS
, "illegal ntlmssp phase\n");
605 /* Testing shows that buffer offset must be at location of Buffer[0] */
606 req
->SecurityBufferOffset
=
607 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
608 1 /* pad */ - 4 /* rfc1001 len */);
609 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
610 iov
[1].iov_base
= security_blob
;
611 iov
[1].iov_len
= blob_length
;
613 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
615 /* BB add code to build os and lm fields */
617 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
,
618 CIFS_LOG_ERROR
| CIFS_NEG_OP
);
620 kfree(security_blob
);
621 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
622 if (resp_buftype
!= CIFS_NO_BUFFER
&&
623 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
624 if (phase
!= NtLmNegotiate
) {
625 cifs_dbg(VFS
, "Unexpected more processing error\n");
628 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
629 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
630 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
631 le16_to_cpu(rsp
->SecurityBufferOffset
));
636 /* NTLMSSP Negotiate sent now processing challenge (response) */
637 phase
= NtLmChallenge
; /* process ntlmssp challenge */
638 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
639 ses
->Suid
= rsp
->hdr
.SessionId
;
640 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
641 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
645 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
646 * but at least the raw NTLMSSP case works.
649 * No tcon so can't do
650 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
655 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
657 free_rsp_buf(resp_buftype
, rsp
);
659 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
660 if ((phase
== NtLmChallenge
) && (rc
== 0))
661 goto ssetup_ntlmssp_authenticate
;
666 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
668 struct smb2_logoff_req
*req
; /* response is also trivial struct */
670 struct TCP_Server_Info
*server
;
672 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
674 if (ses
&& (ses
->server
))
675 server
= ses
->server
;
679 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
683 /* since no tcon, smb2_init can not do this, so do here */
684 req
->hdr
.SessionId
= ses
->Suid
;
685 if (server
->sec_mode
& SECMODE_SIGN_REQUIRED
)
686 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
688 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
690 * No tcon so can't do
691 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
696 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
698 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
701 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
704 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
705 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
707 struct smb2_tree_connect_req
*req
;
708 struct smb2_tree_connect_rsp
*rsp
= NULL
;
713 struct TCP_Server_Info
*server
;
714 __le16
*unc_path
= NULL
;
716 cifs_dbg(FYI
, "TCON\n");
718 if ((ses
->server
) && tree
)
719 server
= ses
->server
;
723 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
724 if (unc_path
== NULL
)
727 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
729 if (unc_path_len
< 2) {
734 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
738 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
745 /* since no tcon, smb2_init can not do this, so do here */
746 req
->hdr
.SessionId
= ses
->Suid
;
747 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
748 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
751 iov
[0].iov_base
= (char *)req
;
752 /* 4 for rfc1002 length field and 1 for pad */
753 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
755 /* Testing shows that buffer offset must be at location of Buffer[0] */
756 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
757 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
758 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
759 iov
[1].iov_base
= unc_path
;
760 iov
[1].iov_len
= unc_path_len
;
762 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
764 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
765 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
769 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
770 tcon
->need_reconnect
= true;
772 goto tcon_error_exit
;
776 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
780 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
781 cifs_dbg(FYI
, "connection to disk share\n");
782 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
784 cifs_dbg(FYI
, "connection to pipe share\n");
785 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
787 cifs_dbg(FYI
, "connection to printer\n");
789 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
791 goto tcon_error_exit
;
794 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
795 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
796 tcon
->tidStatus
= CifsGood
;
797 tcon
->need_reconnect
= false;
798 tcon
->tid
= rsp
->hdr
.TreeId
;
799 strncpy(tcon
->treeName
, tree
, MAX_TREE_SIZE
);
801 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
802 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
803 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
806 free_rsp_buf(resp_buftype
, rsp
);
811 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
812 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
818 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
820 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
822 struct TCP_Server_Info
*server
;
823 struct cifs_ses
*ses
= tcon
->ses
;
825 cifs_dbg(FYI
, "Tree Disconnect\n");
827 if (ses
&& (ses
->server
))
828 server
= ses
->server
;
832 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
835 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
839 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
841 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
846 static struct create_lease
*
847 create_lease_buf(u8
*lease_key
, u8 oplock
)
849 struct create_lease
*buf
;
851 buf
= kzalloc(sizeof(struct create_lease
), GFP_KERNEL
);
855 buf
->lcontext
.LeaseKeyLow
= cpu_to_le64(*((u64
*)lease_key
));
856 buf
->lcontext
.LeaseKeyHigh
= cpu_to_le64(*((u64
*)(lease_key
+ 8)));
857 if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
)
858 buf
->lcontext
.LeaseState
= SMB2_LEASE_WRITE_CACHING
|
859 SMB2_LEASE_READ_CACHING
;
860 else if (oplock
== SMB2_OPLOCK_LEVEL_II
)
861 buf
->lcontext
.LeaseState
= SMB2_LEASE_READ_CACHING
;
862 else if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
)
863 buf
->lcontext
.LeaseState
= SMB2_LEASE_HANDLE_CACHING
|
864 SMB2_LEASE_READ_CACHING
|
865 SMB2_LEASE_WRITE_CACHING
;
867 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
868 (struct create_lease
, lcontext
));
869 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context
));
870 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
871 (struct create_lease
, Name
));
872 buf
->ccontext
.NameLength
= cpu_to_le16(4);
881 parse_lease_state(struct smb2_create_rsp
*rsp
)
884 struct create_lease
*lc
;
887 data_offset
= (char *)rsp
;
888 data_offset
+= 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
889 lc
= (struct create_lease
*)data_offset
;
891 char *name
= le16_to_cpu(lc
->ccontext
.NameOffset
) + (char *)lc
;
892 if (le16_to_cpu(lc
->ccontext
.NameLength
) != 4 ||
893 strncmp(name
, "RqLs", 4)) {
894 lc
= (struct create_lease
*)((char *)lc
895 + le32_to_cpu(lc
->ccontext
.Next
));
898 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS
)
899 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
902 } while (le32_to_cpu(lc
->ccontext
.Next
) != 0);
907 return smb2_map_lease_to_oplock(lc
->lcontext
.LeaseState
);
911 SMB2_open(const unsigned int xid
, struct cifs_tcon
*tcon
, __le16
*path
,
912 u64
*persistent_fid
, u64
*volatile_fid
, __u32 desired_access
,
913 __u32 create_disposition
, __u32 file_attributes
, __u32 create_options
,
914 __u8
*oplock
, struct smb2_file_all_info
*buf
)
916 struct smb2_create_req
*req
;
917 struct smb2_create_rsp
*rsp
;
918 struct TCP_Server_Info
*server
;
919 struct cifs_ses
*ses
= tcon
->ses
;
923 __le16
*copy_path
= NULL
;
928 cifs_dbg(FYI
, "create/open\n");
930 if (ses
&& (ses
->server
))
931 server
= ses
->server
;
935 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
939 req
->ImpersonationLevel
= IL_IMPERSONATION
;
940 req
->DesiredAccess
= cpu_to_le32(desired_access
);
941 /* File attributes ignored on open (used in create though) */
942 req
->FileAttributes
= cpu_to_le32(file_attributes
);
943 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
944 req
->CreateDisposition
= cpu_to_le32(create_disposition
);
945 req
->CreateOptions
= cpu_to_le32(create_options
);
946 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
947 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
)
948 - 8 /* pad */ - 4 /* do not count rfc1001 len field */);
950 iov
[0].iov_base
= (char *)req
;
951 /* 4 for rfc1002 length field */
952 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
954 /* MUST set path len (NameLength) to 0 opening root of share */
955 if (uni_path_len
>= 4) {
956 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
957 /* -1 since last byte is buf[0] which is sent below (path) */
959 if (uni_path_len
% 8 != 0) {
960 copy_size
= uni_path_len
/ 8 * 8;
961 if (copy_size
< uni_path_len
)
964 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
967 memcpy((char *)copy_path
, (const char *)path
,
969 uni_path_len
= copy_size
;
973 iov
[1].iov_len
= uni_path_len
;
974 iov
[1].iov_base
= path
;
976 * -1 since last byte is buf[0] which was counted in
979 inc_rfc1001_len(req
, uni_path_len
- 1);
982 req
->hdr
.smb2_buf_length
= cpu_to_be32(be32_to_cpu(
983 req
->hdr
.smb2_buf_length
) + 8 - 1);
988 if (!server
->oplocks
)
989 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
991 if (!(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
992 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
993 req
->RequestedOplockLevel
= *oplock
;
995 iov
[num_iovecs
].iov_base
= create_lease_buf(oplock
+1, *oplock
);
996 if (iov
[num_iovecs
].iov_base
== NULL
) {
997 cifs_small_buf_release(req
);
1001 iov
[num_iovecs
].iov_len
= sizeof(struct create_lease
);
1002 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1003 req
->CreateContextsOffset
= cpu_to_le32(
1004 sizeof(struct smb2_create_req
) - 4 - 8 +
1005 iov
[num_iovecs
-1].iov_len
);
1006 req
->CreateContextsLength
= cpu_to_le32(
1007 sizeof(struct create_lease
));
1008 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_lease
));
1012 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1013 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
1016 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1020 *persistent_fid
= rsp
->PersistentFileId
;
1021 *volatile_fid
= rsp
->VolatileFileId
;
1024 memcpy(buf
, &rsp
->CreationTime
, 32);
1025 buf
->AllocationSize
= rsp
->AllocationSize
;
1026 buf
->EndOfFile
= rsp
->EndofFile
;
1027 buf
->Attributes
= rsp
->FileAttributes
;
1028 buf
->NumberOfLinks
= cpu_to_le32(1);
1029 buf
->DeletePending
= 0;
1032 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1033 *oplock
= parse_lease_state(rsp
);
1035 *oplock
= rsp
->OplockLevel
;
1038 free_rsp_buf(resp_buftype
, rsp
);
1043 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1044 u64 persistent_fid
, u64 volatile_fid
)
1046 struct smb2_close_req
*req
;
1047 struct smb2_close_rsp
*rsp
;
1048 struct TCP_Server_Info
*server
;
1049 struct cifs_ses
*ses
= tcon
->ses
;
1054 cifs_dbg(FYI
, "Close\n");
1056 if (ses
&& (ses
->server
))
1057 server
= ses
->server
;
1061 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1065 req
->PersistentFileId
= persistent_fid
;
1066 req
->VolatileFileId
= volatile_fid
;
1068 iov
[0].iov_base
= (char *)req
;
1069 /* 4 for rfc1002 length field */
1070 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1072 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1073 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1077 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1081 /* BB FIXME - decode close response, update inode for caching */
1084 free_rsp_buf(resp_buftype
, rsp
);
1089 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1090 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1093 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1094 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1095 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1096 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1099 if (buffer_length
< min_buf_size
) {
1100 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1101 buffer_length
, min_buf_size
);
1105 /* check if beyond RFC1001 maximum length */
1106 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1107 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1108 buffer_length
, smb_len
);
1112 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1113 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1121 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1122 * Caller must free buffer.
1125 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1126 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1130 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1136 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1140 memcpy(data
, begin_of_buf
, buffer_length
);
1146 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1147 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1148 size_t output_len
, size_t min_len
, void *data
)
1150 struct smb2_query_info_req
*req
;
1151 struct smb2_query_info_rsp
*rsp
= NULL
;
1155 struct TCP_Server_Info
*server
;
1156 struct cifs_ses
*ses
= tcon
->ses
;
1158 cifs_dbg(FYI
, "Query Info\n");
1160 if (ses
&& (ses
->server
))
1161 server
= ses
->server
;
1165 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1169 req
->InfoType
= SMB2_O_INFO_FILE
;
1170 req
->FileInfoClass
= info_class
;
1171 req
->PersistentFileId
= persistent_fid
;
1172 req
->VolatileFileId
= volatile_fid
;
1173 /* 4 for rfc1002 length field and 1 for Buffer */
1174 req
->InputBufferOffset
=
1175 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1176 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1178 iov
[0].iov_base
= (char *)req
;
1179 /* 4 for rfc1002 length field */
1180 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1182 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1183 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1186 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1190 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1191 le32_to_cpu(rsp
->OutputBufferLength
),
1192 &rsp
->hdr
, min_len
, data
);
1195 free_rsp_buf(resp_buftype
, rsp
);
1200 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1201 u64 persistent_fid
, u64 volatile_fid
,
1202 struct smb2_file_all_info
*data
)
1204 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1205 FILE_ALL_INFORMATION
,
1206 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
1207 sizeof(struct smb2_file_all_info
), data
);
1211 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1212 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1214 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1215 FILE_INTERNAL_INFORMATION
,
1216 sizeof(struct smb2_file_internal_info
),
1217 sizeof(struct smb2_file_internal_info
), uniqueid
);
1221 * This is a no-op for now. We're not really interested in the reply, but
1222 * rather in the fact that the server sent one and that server->lstrp
1225 * FIXME: maybe we should consider checking that the reply matches request?
1228 smb2_echo_callback(struct mid_q_entry
*mid
)
1230 struct TCP_Server_Info
*server
= mid
->callback_data
;
1231 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1232 unsigned int credits_received
= 1;
1234 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1235 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1237 DeleteMidQEntry(mid
);
1238 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1241 void smb2_reconnect_server(struct work_struct
*work
)
1243 struct TCP_Server_Info
*server
= container_of(work
,
1244 struct TCP_Server_Info
, reconnect
.work
);
1245 struct cifs_ses
*ses
;
1246 struct cifs_tcon
*tcon
, *tcon2
;
1247 struct list_head tmp_list
;
1248 int tcon_exist
= false;
1250 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
1251 mutex_lock(&server
->reconnect_mutex
);
1253 INIT_LIST_HEAD(&tmp_list
);
1254 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
1256 spin_lock(&cifs_tcp_ses_lock
);
1257 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
1258 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
1259 if (tcon
->need_reconnect
) {
1261 list_add_tail(&tcon
->rlist
, &tmp_list
);
1267 * Get the reference to server struct to be sure that the last call of
1268 * cifs_put_tcon() in the loop below won't release the server pointer.
1271 server
->srv_count
++;
1273 spin_unlock(&cifs_tcp_ses_lock
);
1275 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
1276 smb2_reconnect(SMB2_ECHO
, tcon
);
1277 list_del_init(&tcon
->rlist
);
1278 cifs_put_tcon(tcon
);
1281 cifs_dbg(FYI
, "Reconnecting tcons finished\n");
1282 mutex_unlock(&server
->reconnect_mutex
);
1284 /* now we can safely release srv struct */
1286 cifs_put_tcp_session(server
, 1);
1290 SMB2_echo(struct TCP_Server_Info
*server
)
1292 struct smb2_echo_req
*req
;
1295 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1298 cifs_dbg(FYI
, "In echo request\n");
1300 if (server
->tcpStatus
== CifsNeedNegotiate
) {
1301 /* No need to send echo on newly established connections */
1302 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
1306 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1310 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1312 iov
.iov_base
= (char *)req
;
1313 /* 4 for rfc1002 length field */
1314 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1316 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1319 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
1321 cifs_small_buf_release(req
);
1326 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1329 struct smb2_flush_req
*req
;
1330 struct TCP_Server_Info
*server
;
1331 struct cifs_ses
*ses
= tcon
->ses
;
1336 cifs_dbg(FYI
, "Flush\n");
1338 if (ses
&& (ses
->server
))
1339 server
= ses
->server
;
1343 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1347 req
->PersistentFileId
= persistent_fid
;
1348 req
->VolatileFileId
= volatile_fid
;
1350 iov
[0].iov_base
= (char *)req
;
1351 /* 4 for rfc1002 length field */
1352 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1354 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1356 if ((rc
!= 0) && tcon
)
1357 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1359 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1364 * To form a chain of read requests, any read requests after the first should
1365 * have the end_of_chain boolean set to true.
1368 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1369 unsigned int remaining_bytes
, int request_type
)
1372 struct smb2_read_req
*req
= NULL
;
1374 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1377 if (io_parms
->tcon
->ses
->server
== NULL
)
1378 return -ECONNABORTED
;
1380 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1382 req
->PersistentFileId
= io_parms
->persistent_fid
;
1383 req
->VolatileFileId
= io_parms
->volatile_fid
;
1384 req
->ReadChannelInfoOffset
= 0; /* reserved */
1385 req
->ReadChannelInfoLength
= 0; /* reserved */
1386 req
->Channel
= 0; /* reserved */
1387 req
->MinimumCount
= 0;
1388 req
->Length
= cpu_to_le32(io_parms
->length
);
1389 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1391 if (request_type
& CHAINED_REQUEST
) {
1392 if (!(request_type
& END_OF_CHAIN
)) {
1393 /* 4 for rfc1002 length field */
1394 req
->hdr
.NextCommand
=
1395 cpu_to_le32(get_rfc1002_length(req
) + 4);
1396 } else /* END_OF_CHAIN */
1397 req
->hdr
.NextCommand
= 0;
1398 if (request_type
& RELATED_REQUEST
) {
1399 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1401 * Related requests use info from previous read request
1404 req
->hdr
.SessionId
= 0xFFFFFFFF;
1405 req
->hdr
.TreeId
= 0xFFFFFFFF;
1406 req
->PersistentFileId
= 0xFFFFFFFF;
1407 req
->VolatileFileId
= 0xFFFFFFFF;
1410 if (remaining_bytes
> io_parms
->length
)
1411 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1413 req
->RemainingBytes
= 0;
1415 iov
[0].iov_base
= (char *)req
;
1416 /* 4 for rfc1002 length field */
1417 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1422 smb2_readv_callback(struct mid_q_entry
*mid
)
1424 struct cifs_readdata
*rdata
= mid
->callback_data
;
1425 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1426 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1427 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1428 unsigned int credits_received
= 1;
1429 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1431 .rq_pages
= rdata
->pages
,
1432 .rq_npages
= rdata
->nr_pages
,
1433 .rq_pagesz
= rdata
->pagesz
,
1434 .rq_tailsz
= rdata
->tailsz
};
1436 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1437 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
1440 switch (mid
->mid_state
) {
1441 case MID_RESPONSE_RECEIVED
:
1442 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1443 /* result already set, check signature */
1444 if (server
->sec_mode
&
1445 (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
)) {
1448 rc
= smb2_verify_signature(&rqst
, server
);
1450 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
1453 /* FIXME: should this be counted toward the initiating task? */
1454 task_io_account_read(rdata
->bytes
);
1455 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1457 case MID_REQUEST_SUBMITTED
:
1458 case MID_RETRY_NEEDED
:
1459 rdata
->result
= -EAGAIN
;
1462 if (rdata
->result
!= -ENODATA
)
1463 rdata
->result
= -EIO
;
1467 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1469 queue_work(cifsiod_wq
, &rdata
->work
);
1470 DeleteMidQEntry(mid
);
1471 add_credits(server
, credits_received
, 0);
1474 /* smb2_async_readv - send an async write, and set up mid to handle result */
1476 smb2_async_readv(struct cifs_readdata
*rdata
)
1479 struct smb2_hdr
*buf
;
1480 struct cifs_io_parms io_parms
;
1481 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1484 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
1485 __func__
, rdata
->offset
, rdata
->bytes
);
1487 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1488 io_parms
.offset
= rdata
->offset
;
1489 io_parms
.length
= rdata
->bytes
;
1490 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1491 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1492 io_parms
.pid
= rdata
->pid
;
1493 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1497 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1498 /* 4 for rfc1002 length field */
1499 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1501 kref_get(&rdata
->refcount
);
1502 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1503 cifs_readv_receive
, smb2_readv_callback
,
1506 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1507 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1510 cifs_small_buf_release(buf
);
1515 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1516 unsigned int *nbytes
, char **buf
, int *buf_type
)
1518 int resp_buftype
, rc
= -EACCES
;
1519 struct smb2_read_rsp
*rsp
= NULL
;
1523 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1527 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1528 &resp_buftype
, CIFS_LOG_ERROR
);
1530 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1532 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1533 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1538 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1539 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
1541 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1542 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1543 (*nbytes
> io_parms
->length
)) {
1544 cifs_dbg(FYI
, "bad length %d for count %d\n",
1545 *nbytes
, io_parms
->length
);
1552 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1554 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1555 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1556 *buf
= iov
[0].iov_base
;
1557 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1558 *buf_type
= CIFS_SMALL_BUFFER
;
1559 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1560 *buf_type
= CIFS_LARGE_BUFFER
;
1566 * Check the mid_state and signature on received buffer (if any), and queue the
1567 * workqueue completion task.
1570 smb2_writev_callback(struct mid_q_entry
*mid
)
1572 struct cifs_writedata
*wdata
= mid
->callback_data
;
1573 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1574 unsigned int written
;
1575 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1576 unsigned int credits_received
= 1;
1578 switch (mid
->mid_state
) {
1579 case MID_RESPONSE_RECEIVED
:
1580 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1581 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1582 if (wdata
->result
!= 0)
1585 written
= le32_to_cpu(rsp
->DataLength
);
1587 * Mask off high 16 bits when bytes written as returned
1588 * by the server is greater than bytes requested by the
1589 * client. OS/2 servers are known to set incorrect
1592 if (written
> wdata
->bytes
)
1595 if (written
< wdata
->bytes
)
1596 wdata
->result
= -ENOSPC
;
1598 wdata
->bytes
= written
;
1600 case MID_REQUEST_SUBMITTED
:
1601 case MID_RETRY_NEEDED
:
1602 wdata
->result
= -EAGAIN
;
1605 wdata
->result
= -EIO
;
1610 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1612 queue_work(cifsiod_wq
, &wdata
->work
);
1613 DeleteMidQEntry(mid
);
1614 add_credits(tcon
->ses
->server
, credits_received
, 0);
1617 /* smb2_async_writev - send an async write, and set up mid to handle result */
1619 smb2_async_writev(struct cifs_writedata
*wdata
)
1622 struct smb2_write_req
*req
= NULL
;
1623 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1625 struct smb_rqst rqst
;
1627 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1629 goto async_writev_out
;
1631 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1633 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1634 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1635 req
->WriteChannelInfoOffset
= 0;
1636 req
->WriteChannelInfoLength
= 0;
1638 req
->Offset
= cpu_to_le64(wdata
->offset
);
1639 /* 4 for rfc1002 length field */
1640 req
->DataOffset
= cpu_to_le16(
1641 offsetof(struct smb2_write_req
, Buffer
) - 4);
1642 req
->RemainingBytes
= 0;
1644 /* 4 for rfc1002 length field and 1 for Buffer */
1645 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1650 rqst
.rq_pages
= wdata
->pages
;
1651 rqst
.rq_npages
= wdata
->nr_pages
;
1652 rqst
.rq_pagesz
= wdata
->pagesz
;
1653 rqst
.rq_tailsz
= wdata
->tailsz
;
1655 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
1656 wdata
->offset
, wdata
->bytes
);
1658 req
->Length
= cpu_to_le32(wdata
->bytes
);
1660 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1662 kref_get(&wdata
->refcount
);
1663 rc
= cifs_call_async(tcon
->ses
->server
, &rqst
, NULL
,
1664 smb2_writev_callback
, wdata
, 0);
1667 kref_put(&wdata
->refcount
, cifs_writedata_release
);
1668 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1672 cifs_small_buf_release(req
);
1677 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1678 * The length field from io_parms must be at least 1 and indicates a number of
1679 * elements with data to write that begins with position 1 in iov array. All
1680 * data length is specified by count.
1683 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1684 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1687 struct smb2_write_req
*req
= NULL
;
1688 struct smb2_write_rsp
*rsp
= NULL
;
1695 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1699 if (io_parms
->tcon
->ses
->server
== NULL
)
1700 return -ECONNABORTED
;
1702 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1704 req
->PersistentFileId
= io_parms
->persistent_fid
;
1705 req
->VolatileFileId
= io_parms
->volatile_fid
;
1706 req
->WriteChannelInfoOffset
= 0;
1707 req
->WriteChannelInfoLength
= 0;
1709 req
->Length
= cpu_to_le32(io_parms
->length
);
1710 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1711 /* 4 for rfc1002 length field */
1712 req
->DataOffset
= cpu_to_le16(
1713 offsetof(struct smb2_write_req
, Buffer
) - 4);
1714 req
->RemainingBytes
= 0;
1716 iov
[0].iov_base
= (char *)req
;
1717 /* 4 for rfc1002 length field and 1 for Buffer */
1718 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1720 /* length of entire message including data to be written */
1721 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1723 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
1725 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
1728 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
1729 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
1731 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1733 free_rsp_buf(resp_buftype
, rsp
);
1738 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
1741 unsigned int entrycount
= 0;
1742 unsigned int next_offset
= 0;
1743 FILE_DIRECTORY_INFO
*entryptr
;
1745 if (bufstart
== NULL
)
1748 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
1751 entryptr
= (FILE_DIRECTORY_INFO
*)
1752 ((char *)entryptr
+ next_offset
);
1754 if ((char *)entryptr
+ size
> end_of_buf
) {
1755 cifs_dbg(VFS
, "malformed search entry would overflow\n");
1759 len
= le32_to_cpu(entryptr
->FileNameLength
);
1760 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
1761 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
1766 *lastentry
= (char *)entryptr
;
1769 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
1781 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
1782 u64 persistent_fid
, u64 volatile_fid
, int index
,
1783 struct cifs_search_info
*srch_inf
)
1785 struct smb2_query_directory_req
*req
;
1786 struct smb2_query_directory_rsp
*rsp
= NULL
;
1791 unsigned char *bufptr
;
1792 struct TCP_Server_Info
*server
;
1793 struct cifs_ses
*ses
= tcon
->ses
;
1794 __le16 asteriks
= cpu_to_le16('*');
1796 unsigned int output_size
= CIFSMaxBufSize
;
1797 size_t info_buf_size
;
1799 if (ses
&& (ses
->server
))
1800 server
= ses
->server
;
1804 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
1808 switch (srch_inf
->info_level
) {
1809 case SMB_FIND_FILE_DIRECTORY_INFO
:
1810 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
1811 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
1813 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
1814 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
1815 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
1818 cifs_dbg(VFS
, "info level %u isn't supported\n",
1819 srch_inf
->info_level
);
1824 req
->FileIndex
= cpu_to_le32(index
);
1825 req
->PersistentFileId
= persistent_fid
;
1826 req
->VolatileFileId
= volatile_fid
;
1829 bufptr
= req
->Buffer
;
1830 memcpy(bufptr
, &asteriks
, len
);
1832 req
->FileNameOffset
=
1833 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
1834 req
->FileNameLength
= cpu_to_le16(len
);
1836 * BB could be 30 bytes or so longer if we used SMB2 specific
1837 * buffer lengths, but this is safe and close enough.
1839 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
1840 output_size
= min_t(unsigned int, output_size
, 2 << 15);
1841 req
->OutputBufferLength
= cpu_to_le32(output_size
);
1843 iov
[0].iov_base
= (char *)req
;
1844 /* 4 for RFC1001 length and 1 for Buffer */
1845 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1847 iov
[1].iov_base
= (char *)(req
->Buffer
);
1848 iov
[1].iov_len
= len
;
1850 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
1852 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
1853 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
1856 if (rc
== -ENODATA
&& rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
) {
1857 srch_inf
->endOfSearch
= true;
1860 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
1864 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1865 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
1870 srch_inf
->unicode
= true;
1872 if (srch_inf
->ntwrk_buf_start
) {
1873 if (srch_inf
->smallBuf
)
1874 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
1876 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
1878 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
1879 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
1880 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
1881 /* 4 for rfc1002 length field */
1882 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
1883 srch_inf
->entries_in_buffer
=
1884 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
1885 &srch_inf
->last_entry
, info_buf_size
);
1886 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
1887 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
1888 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
1889 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
1890 if (resp_buftype
== CIFS_LARGE_BUFFER
)
1891 srch_inf
->smallBuf
= false;
1892 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
1893 srch_inf
->smallBuf
= true;
1895 cifs_dbg(VFS
, "illegal search buffer type\n");
1900 free_rsp_buf(resp_buftype
, rsp
);
1905 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1906 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
1907 unsigned int num
, void **data
, unsigned int *size
)
1909 struct smb2_set_info_req
*req
;
1910 struct smb2_set_info_rsp
*rsp
= NULL
;
1915 struct TCP_Server_Info
*server
;
1916 struct cifs_ses
*ses
= tcon
->ses
;
1918 if (ses
&& (ses
->server
))
1919 server
= ses
->server
;
1926 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
1930 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
1936 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
1938 req
->InfoType
= SMB2_O_INFO_FILE
;
1939 req
->FileInfoClass
= info_class
;
1940 req
->PersistentFileId
= persistent_fid
;
1941 req
->VolatileFileId
= volatile_fid
;
1943 /* 4 for RFC1001 length and 1 for Buffer */
1945 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
1946 req
->BufferLength
= cpu_to_le32(*size
);
1948 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
1950 memcpy(req
->Buffer
, *data
, *size
);
1952 iov
[0].iov_base
= (char *)req
;
1953 /* 4 for RFC1001 length */
1954 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1956 for (i
= 1; i
< num
; i
++) {
1957 inc_rfc1001_len(req
, size
[i
]);
1958 le32_add_cpu(&req
->BufferLength
, size
[i
]);
1959 iov
[i
].iov_base
= (char *)data
[i
];
1960 iov
[i
].iov_len
= size
[i
];
1963 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
1964 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
1967 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
1971 free_rsp_buf(resp_buftype
, rsp
);
1977 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
1978 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
1980 struct smb2_file_rename_info info
;
1982 unsigned int size
[2];
1984 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
1986 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
1990 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
1991 /* 0 = fail if target already exists */
1992 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
1993 info
.FileNameLength
= cpu_to_le32(len
);
1996 size
[0] = sizeof(struct smb2_file_rename_info
);
1998 data
[1] = target_file
;
1999 size
[1] = len
+ 2 /* null */;
2001 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2002 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2009 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2010 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2012 struct smb2_file_link_info info
;
2014 unsigned int size
[2];
2016 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2018 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2022 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2023 /* 0 = fail if link already exists */
2024 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2025 info
.FileNameLength
= cpu_to_le32(len
);
2028 size
[0] = sizeof(struct smb2_file_link_info
);
2030 data
[1] = target_file
;
2031 size
[1] = len
+ 2 /* null */;
2033 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2034 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2040 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2041 u64 volatile_fid
, u32 pid
, __le64
*eof
)
2043 struct smb2_file_eof_info info
;
2047 info
.EndOfFile
= *eof
;
2050 size
= sizeof(struct smb2_file_eof_info
);
2052 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
2053 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2057 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2058 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2061 size
= sizeof(FILE_BASIC_INFO
);
2062 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2063 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2064 (void **)&buf
, &size
);
2068 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2069 const u64 persistent_fid
, const u64 volatile_fid
,
2073 struct smb2_oplock_break
*req
= NULL
;
2075 cifs_dbg(FYI
, "SMB2_oplock_break\n");
2076 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2081 req
->VolatileFid
= volatile_fid
;
2082 req
->PersistentFid
= persistent_fid
;
2083 req
->OplockLevel
= oplock_level
;
2084 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2086 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2087 /* SMB2 buffer freed by function above */
2090 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2091 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
2098 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2099 struct kstatfs
*kst
)
2101 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2102 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2103 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2104 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2105 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2110 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2111 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2114 struct smb2_query_info_req
*req
;
2116 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2118 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2121 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2125 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2126 req
->FileInfoClass
= level
;
2127 req
->PersistentFileId
= persistent_fid
;
2128 req
->VolatileFileId
= volatile_fid
;
2129 /* 4 for rfc1002 length field and 1 for pad */
2130 req
->InputBufferOffset
=
2131 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2132 req
->OutputBufferLength
= cpu_to_le32(
2133 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2135 iov
->iov_base
= (char *)req
;
2136 /* 4 for rfc1002 length field */
2137 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2142 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2143 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2145 struct smb2_query_info_rsp
*rsp
= NULL
;
2149 struct cifs_ses
*ses
= tcon
->ses
;
2150 struct smb2_fs_full_size_info
*info
= NULL
;
2152 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2153 sizeof(struct smb2_fs_full_size_info
),
2154 persistent_fid
, volatile_fid
);
2158 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2160 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2163 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2165 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2166 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2167 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2168 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2169 sizeof(struct smb2_fs_full_size_info
));
2171 copy_fs_info_to_kstatfs(info
, fsdata
);
2174 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2179 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2180 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2181 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2184 struct smb2_lock_req
*req
= NULL
;
2189 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2191 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2195 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2196 req
->LockCount
= cpu_to_le16(num_lock
);
2198 req
->PersistentFileId
= persist_fid
;
2199 req
->VolatileFileId
= volatile_fid
;
2201 count
= num_lock
* sizeof(struct smb2_lock_element
);
2202 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2204 iov
[0].iov_base
= (char *)req
;
2205 /* 4 for rfc1002 length field and count for all locks */
2206 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2207 iov
[1].iov_base
= (char *)buf
;
2208 iov
[1].iov_len
= count
;
2210 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2211 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2213 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2214 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2221 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2222 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2223 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2226 struct smb2_lock_element lock
;
2228 lock
.Offset
= cpu_to_le64(offset
);
2229 lock
.Length
= cpu_to_le64(length
);
2230 lock
.Flags
= cpu_to_le32(lock_flags
);
2231 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2232 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2234 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2238 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2239 __u8
*lease_key
, const __le32 lease_state
)
2242 struct smb2_lease_ack
*req
= NULL
;
2244 cifs_dbg(FYI
, "SMB2_lease_break\n");
2245 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2250 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2251 req
->StructureSize
= cpu_to_le16(36);
2252 inc_rfc1001_len(req
, 12);
2254 memcpy(req
->LeaseKey
, lease_key
, 16);
2255 req
->LeaseState
= lease_state
;
2257 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2258 /* SMB2 buffer freed by function above */
2261 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2262 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);