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"
50 * The following table defines the expected "StructureSize" of SMB2 requests
51 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
53 * Note that commands are defined in smb2pdu.h in le16 but the array below is
54 * indexed by command in host byte order.
56 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
57 /* SMB2_NEGOTIATE */ 36,
58 /* SMB2_SESSION_SETUP */ 25,
60 /* SMB2_TREE_CONNECT */ 9,
61 /* SMB2_TREE_DISCONNECT */ 4,
71 /* SMB2_QUERY_DIRECTORY */ 33,
72 /* SMB2_CHANGE_NOTIFY */ 32,
73 /* SMB2_QUERY_INFO */ 41,
74 /* SMB2_SET_INFO */ 33,
75 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
80 smb2_hdr_assemble(struct smb2_hdr
*hdr
, __le16 smb2_cmd
/* command */ ,
81 const struct cifs_tcon
*tcon
)
83 struct smb2_pdu
*pdu
= (struct smb2_pdu
*)hdr
;
84 char *temp
= (char *)hdr
;
85 /* lookup word count ie StructureSize from table */
86 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_cmd
)];
89 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
90 * largest operations (Create)
94 /* Note this is only network field converted to big endian */
95 hdr
->smb2_buf_length
= cpu_to_be32(parmsize
+ sizeof(struct smb2_hdr
)
96 - 4 /* RFC 1001 length field itself not counted */);
98 hdr
->ProtocolId
[0] = 0xFE;
99 hdr
->ProtocolId
[1] = 'S';
100 hdr
->ProtocolId
[2] = 'M';
101 hdr
->ProtocolId
[3] = 'B';
102 hdr
->StructureSize
= cpu_to_le16(64);
103 hdr
->Command
= smb2_cmd
;
104 hdr
->CreditRequest
= cpu_to_le16(2); /* BB make this dynamic */
105 hdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
110 hdr
->TreeId
= tcon
->tid
;
111 /* Uid is not converted */
113 hdr
->SessionId
= tcon
->ses
->Suid
;
114 /* BB check following DFS flags BB */
115 /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */
116 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
)
117 hdr
->Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
118 /* BB how does SMB2 do case sensitive? */
120 hdr->Flags |= SMBFLG_CASELESS; */
121 if (tcon
->ses
&& tcon
->ses
->server
&&
122 (tcon
->ses
->server
->sec_mode
& SECMODE_SIGN_REQUIRED
))
123 hdr
->Flags
|= SMB2_FLAGS_SIGNED
;
125 pdu
->StructureSize2
= cpu_to_le16(parmsize
);
130 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
133 struct nls_table
*nls_codepage
;
134 struct cifs_ses
*ses
;
135 struct TCP_Server_Info
*server
;
138 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
139 * check for tcp and smb session status done differently
140 * for those three - in the calling routine.
145 if (smb2_command
== SMB2_TREE_CONNECT
)
148 if (tcon
->tidStatus
== CifsExiting
) {
150 * only tree disconnect, open, and write,
151 * (and ulogoff which does not have tcon)
152 * are allowed as we start force umount.
154 if ((smb2_command
!= SMB2_WRITE
) &&
155 (smb2_command
!= SMB2_CREATE
) &&
156 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
157 cFYI(1, "can not send cmd %d while umounting",
162 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
163 (!tcon
->ses
->server
))
167 server
= ses
->server
;
170 * Give demultiplex thread up to 10 seconds to reconnect, should be
171 * greater than cifs socket timeout which is 7 seconds
173 while (server
->tcpStatus
== CifsNeedReconnect
) {
175 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
176 * here since they are implicitly done when session drops.
178 switch (smb2_command
) {
180 * BB Should we keep oplock break and add flush to exceptions?
182 case SMB2_TREE_DISCONNECT
:
185 case SMB2_OPLOCK_BREAK
:
189 wait_event_interruptible_timeout(server
->response_q
,
190 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
192 /* are we still trying to reconnect? */
193 if (server
->tcpStatus
!= CifsNeedReconnect
)
197 * on "soft" mounts we wait once. Hard mounts keep
198 * retrying until process is killed or server comes
202 cFYI(1, "gave up waiting on reconnect in smb_init");
207 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
210 nls_codepage
= load_nls_default();
213 * need to prevent multiple threads trying to simultaneously reconnect
214 * the same SMB session
216 mutex_lock(&tcon
->ses
->session_mutex
);
217 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
218 if (!rc
&& tcon
->ses
->need_reconnect
)
219 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
221 if (rc
|| !tcon
->need_reconnect
) {
222 mutex_unlock(&tcon
->ses
->session_mutex
);
226 cifs_mark_open_files_invalid(tcon
);
227 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
228 mutex_unlock(&tcon
->ses
->session_mutex
);
229 cFYI(1, "reconnect tcon rc = %d", rc
);
232 atomic_inc(&tconInfoReconnectCount
);
234 * BB FIXME add code to check if wsize needs update due to negotiated
235 * smb buffer size shrinking.
239 * Check if handle based operation so we know whether we can continue
240 * or not without returning to caller to reset file handle.
243 * BB Is flush done by server on drop of tcp session? Should we special
244 * case it and skip above?
246 switch (smb2_command
) {
252 case SMB2_QUERY_DIRECTORY
:
253 case SMB2_CHANGE_NOTIFY
:
254 case SMB2_QUERY_INFO
:
258 unload_nls(nls_codepage
);
263 * Allocate and return pointer to an SMB request hdr, and set basic
264 * SMB information in the SMB header. If the return code is zero, this
265 * function must have filled in request_buf pointer.
268 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
273 rc
= smb2_reconnect(smb2_command
, tcon
);
277 /* BB eventually switch this to SMB2 specific small buf size */
278 *request_buf
= cifs_small_buf_get();
279 if (*request_buf
== NULL
) {
280 /* BB should we add a retry in here if not a writepage? */
284 smb2_hdr_assemble((struct smb2_hdr
*) *request_buf
, smb2_command
, tcon
);
287 #ifdef CONFIG_CIFS_STATS2
288 uint16_t com_code
= le16_to_cpu(smb2_command
);
289 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
291 cifs_stats_inc(&tcon
->num_smbs_sent
);
298 free_rsp_buf(int resp_buftype
, void *rsp
)
300 if (resp_buftype
== CIFS_SMALL_BUFFER
)
301 cifs_small_buf_release(rsp
);
302 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
303 cifs_buf_release(rsp
);
306 #define SMB2_NUM_PROT 1
310 #define BAD_PROT 0xFFFF
312 #define SMB2_PROT_ID 0x0202
313 #define SMB21_PROT_ID 0x0210
314 #define BAD_PROT_ID 0xFFFF
319 } smb2protocols
[] = {
320 {SMB2_PROT
, cpu_to_le16(SMB2_PROT_ID
)},
321 {SMB21_PROT
, cpu_to_le16(SMB21_PROT_ID
)},
322 {BAD_PROT
, cpu_to_le16(BAD_PROT_ID
)}
327 * SMB2 Worker functions follow:
329 * The general structure of the worker functions is:
330 * 1) Call smb2_init (assembles SMB2 header)
331 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
332 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
333 * 4) Decode SMB2 command specific fields in the fixed length area
334 * 5) Decode variable length data area (if any for this SMB2 command type)
335 * 6) Call free smb buffer
341 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
343 struct smb2_negotiate_req
*req
;
344 struct smb2_negotiate_rsp
*rsp
;
348 struct TCP_Server_Info
*server
;
349 unsigned int sec_flags
;
352 int blob_offset
, blob_length
;
354 int flags
= CIFS_NEG_OP
;
356 cFYI(1, "Negotiate protocol");
359 server
= ses
->server
;
365 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
369 /* if any of auth flags (ie not sign or seal) are overriden use them */
370 if (ses
->overrideSecFlg
& (~(CIFSSEC_MUST_SIGN
| CIFSSEC_MUST_SEAL
)))
371 sec_flags
= ses
->overrideSecFlg
; /* BB FIXME fix sign flags?*/
372 else /* if override flags set only sign/seal OR them with global auth */
373 sec_flags
= global_secflags
| ses
->overrideSecFlg
;
375 cFYI(1, "sec_flags 0x%x", sec_flags
);
377 req
->hdr
.SessionId
= 0;
379 for (i
= 0; i
< SMB2_NUM_PROT
; i
++)
380 req
->Dialects
[i
] = smb2protocols
[i
].name
;
382 req
->DialectCount
= cpu_to_le16(i
);
383 inc_rfc1001_len(req
, i
* 2);
385 /* only one of SMB2 signing flags may be set in SMB2 request */
386 if ((sec_flags
& CIFSSEC_MUST_SIGN
) == CIFSSEC_MUST_SIGN
)
387 temp
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
388 else if (sec_flags
& CIFSSEC_MAY_SIGN
) /* MAY_SIGN is a single flag */
389 temp
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
391 req
->SecurityMode
= cpu_to_le16(temp
);
393 req
->Capabilities
= cpu_to_le32(SMB2_GLOBAL_CAP_DFS
);
395 iov
[0].iov_base
= (char *)req
;
396 /* 4 for rfc1002 length field */
397 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
399 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
);
401 rsp
= (struct smb2_negotiate_rsp
*)iov
[0].iov_base
;
403 * No tcon so can't do
404 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
414 cFYI(1, "mode 0x%x", rsp
->SecurityMode
);
416 if (rsp
->DialectRevision
== smb2protocols
[SMB21_PROT
].name
)
417 cFYI(1, "negotiated smb2.1 dialect");
418 else if (rsp
->DialectRevision
== smb2protocols
[SMB2_PROT
].name
)
419 cFYI(1, "negotiated smb2 dialect");
421 cERROR(1, "Illegal dialect returned by server %d",
422 le16_to_cpu(rsp
->DialectRevision
));
426 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
428 server
->maxBuf
= le32_to_cpu(rsp
->MaxTransactSize
);
429 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
430 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
431 /* BB Do we need to validate the SecurityMode? */
432 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
433 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
435 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
437 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
439 if (blob_length
== 0) {
440 cERROR(1, "missing security blob on negprot");
445 cFYI(1, "sec_flags 0x%x", sec_flags
);
446 if (sec_flags
& CIFSSEC_MUST_SIGN
) {
447 cFYI(1, "Signing required");
448 if (!(server
->sec_mode
& (SMB2_NEGOTIATE_SIGNING_REQUIRED
|
449 SMB2_NEGOTIATE_SIGNING_ENABLED
))) {
450 cERROR(1, "signing required but server lacks support");
454 server
->sec_mode
|= SECMODE_SIGN_REQUIRED
;
455 } else if (sec_flags
& CIFSSEC_MAY_SIGN
) {
456 cFYI(1, "Signing optional");
457 if (server
->sec_mode
& SMB2_NEGOTIATE_SIGNING_REQUIRED
) {
458 cFYI(1, "Server requires signing");
459 server
->sec_mode
|= SECMODE_SIGN_REQUIRED
;
462 ~(SECMODE_SIGN_ENABLED
| SECMODE_SIGN_REQUIRED
);
465 cFYI(1, "Signing disabled");
466 if (server
->sec_mode
& SMB2_NEGOTIATE_SIGNING_REQUIRED
) {
467 cERROR(1, "Server requires packet signing to be enabled"
468 " in /proc/fs/cifs/SecurityFlags.");
473 ~(SECMODE_SIGN_ENABLED
| SECMODE_SIGN_REQUIRED
);
476 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
477 rc
= decode_neg_token_init(security_blob
, blob_length
,
488 free_rsp_buf(resp_buftype
, rsp
);
493 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
494 const struct nls_table
*nls_cp
)
496 struct smb2_sess_setup_req
*req
;
497 struct smb2_sess_setup_rsp
*rsp
= NULL
;
501 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
502 struct TCP_Server_Info
*server
;
503 unsigned int sec_flags
;
507 char *ntlmssp_blob
= NULL
;
508 bool use_spnego
= false; /* else use raw ntlmssp */
510 cFYI(1, "Session Setup");
513 server
= ses
->server
;
520 * If memory allocation is successful, caller of this function
523 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
527 ses
->server
->secType
= RawNTLMSSP
;
529 ssetup_ntlmssp_authenticate
:
530 if (phase
== NtLmChallenge
)
531 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
533 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
537 /* if any of auth flags (ie not sign or seal) are overriden use them */
538 if (ses
->overrideSecFlg
& (~(CIFSSEC_MUST_SIGN
| CIFSSEC_MUST_SEAL
)))
539 sec_flags
= ses
->overrideSecFlg
; /* BB FIXME fix sign flags?*/
540 else /* if override flags set only sign/seal OR them with global auth */
541 sec_flags
= global_secflags
| ses
->overrideSecFlg
;
543 cFYI(1, "sec_flags 0x%x", sec_flags
);
545 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
546 req
->VcNumber
= 0; /* MBZ */
547 /* to enable echos and oplocks */
548 req
->hdr
.CreditRequest
= cpu_to_le16(3);
550 /* only one of SMB2 signing flags may be set in SMB2 request */
551 if ((sec_flags
& CIFSSEC_MUST_SIGN
) == CIFSSEC_MUST_SIGN
)
552 temp
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
553 else if (ses
->server
->sec_mode
& SMB2_NEGOTIATE_SIGNING_REQUIRED
)
554 temp
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
555 else if (sec_flags
& CIFSSEC_MAY_SIGN
) /* MAY_SIGN is a single flag */
556 temp
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
558 req
->SecurityMode
= temp
;
559 req
->Capabilities
= 0;
560 req
->Channel
= 0; /* MBZ */
562 iov
[0].iov_base
= (char *)req
;
563 /* 4 for rfc1002 length field and 1 for pad */
564 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
565 if (phase
== NtLmNegotiate
) {
566 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
568 if (ntlmssp_blob
== NULL
) {
572 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
574 /* blob_length = build_spnego_ntlmssp_blob(
576 sizeof(struct _NEGOTIATE_MESSAGE),
578 /* BB eventually need to add this */
579 cERROR(1, "spnego not supported for SMB2 yet");
584 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
585 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
586 security_blob
= ntlmssp_blob
;
588 } else if (phase
== NtLmAuthenticate
) {
589 req
->hdr
.SessionId
= ses
->Suid
;
590 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
592 if (ntlmssp_blob
== NULL
) {
593 cERROR(1, "failed to malloc ntlmssp blob");
597 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
600 cFYI(1, "build_ntlmssp_auth_blob failed %d", rc
);
601 goto ssetup_exit
; /* BB double check error handling */
604 /* blob_length = build_spnego_ntlmssp_blob(
608 cERROR(1, "spnego not supported for SMB2 yet");
613 security_blob
= ntlmssp_blob
;
616 cERROR(1, "illegal ntlmssp phase");
621 /* Testing shows that buffer offset must be at location of Buffer[0] */
622 req
->SecurityBufferOffset
=
623 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
624 1 /* pad */ - 4 /* rfc1001 len */);
625 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
626 iov
[1].iov_base
= security_blob
;
627 iov
[1].iov_len
= blob_length
;
629 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
631 /* BB add code to build os and lm fields */
633 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, CIFS_LOG_ERROR
);
635 kfree(security_blob
);
636 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
637 if (rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
638 if (phase
!= NtLmNegotiate
) {
639 cERROR(1, "Unexpected more processing error");
642 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
643 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
644 cERROR(1, "Invalid security buffer offset %d",
645 le16_to_cpu(rsp
->SecurityBufferOffset
));
650 /* NTLMSSP Negotiate sent now processing challenge (response) */
651 phase
= NtLmChallenge
; /* process ntlmssp challenge */
652 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
653 ses
->Suid
= rsp
->hdr
.SessionId
;
654 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
655 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
659 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
660 * but at least the raw NTLMSSP case works.
663 * No tcon so can't do
664 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
674 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
676 free_rsp_buf(resp_buftype
, rsp
);
678 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
679 if ((phase
== NtLmChallenge
) && (rc
== 0))
680 goto ssetup_ntlmssp_authenticate
;
685 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
687 struct smb2_logoff_req
*req
; /* response is also trivial struct */
689 struct TCP_Server_Info
*server
;
691 cFYI(1, "disconnect session %p", ses
);
693 if (ses
&& (ses
->server
))
694 server
= ses
->server
;
698 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
702 /* since no tcon, smb2_init can not do this, so do here */
703 req
->hdr
.SessionId
= ses
->Suid
;
704 if (server
->sec_mode
& SECMODE_SIGN_REQUIRED
)
705 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
707 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
709 * No tcon so can't do
710 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
715 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
717 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
720 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
723 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
724 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
726 struct smb2_tree_connect_req
*req
;
727 struct smb2_tree_connect_rsp
*rsp
= NULL
;
732 struct TCP_Server_Info
*server
;
733 __le16
*unc_path
= NULL
;
737 if ((ses
->server
) && tree
)
738 server
= ses
->server
;
742 if (tcon
&& tcon
->bad_network_name
)
745 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
746 if (unc_path
== NULL
)
749 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
751 if (unc_path_len
< 2) {
756 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
763 /* since no tcon, smb2_init can not do this, so do here */
764 req
->hdr
.SessionId
= ses
->Suid
;
765 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
766 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
769 iov
[0].iov_base
= (char *)req
;
770 /* 4 for rfc1002 length field and 1 for pad */
771 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
773 /* Testing shows that buffer offset must be at location of Buffer[0] */
774 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
775 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
776 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
777 iov
[1].iov_base
= unc_path
;
778 iov
[1].iov_len
= unc_path_len
;
780 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
782 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
783 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
787 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
788 tcon
->need_reconnect
= true;
790 goto tcon_error_exit
;
799 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
803 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
804 cFYI(1, "connection to disk share");
805 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
807 cFYI(1, "connection to pipe share");
808 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
810 cFYI(1, "connection to printer");
812 cERROR(1, "unknown share type %d", rsp
->ShareType
);
814 goto tcon_error_exit
;
817 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
818 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
819 tcon
->tidStatus
= CifsGood
;
820 tcon
->need_reconnect
= false;
821 tcon
->tid
= rsp
->hdr
.TreeId
;
822 strncpy(tcon
->treeName
, tree
, MAX_TREE_SIZE
);
824 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
825 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
826 cERROR(1, "DFS capability contradicts DFS flag");
829 free_rsp_buf(resp_buftype
, rsp
);
834 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
835 cERROR(1, "BAD_NETWORK_NAME: %s", tree
);
836 tcon
->bad_network_name
= true;
842 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
844 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
846 struct TCP_Server_Info
*server
;
847 struct cifs_ses
*ses
= tcon
->ses
;
849 cFYI(1, "Tree Disconnect");
851 if (ses
&& (ses
->server
))
852 server
= ses
->server
;
856 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
859 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
863 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
865 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
871 SMB2_open(const unsigned int xid
, struct cifs_tcon
*tcon
, __le16
*path
,
872 u64
*persistent_fid
, u64
*volatile_fid
, __u32 desired_access
,
873 __u32 create_disposition
, __u32 file_attributes
, __u32 create_options
,
874 struct smb2_file_all_info
*buf
)
876 struct smb2_create_req
*req
;
877 struct smb2_create_rsp
*rsp
;
878 struct TCP_Server_Info
*server
;
879 struct cifs_ses
*ses
= tcon
->ses
;
886 cFYI(1, "create/open");
888 if (ses
&& (ses
->server
))
889 server
= ses
->server
;
893 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
897 /* if (server->oplocks)
898 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_BATCH;
900 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_NONE
;
901 req
->ImpersonationLevel
= IL_IMPERSONATION
;
902 req
->DesiredAccess
= cpu_to_le32(desired_access
);
903 /* File attributes ignored on open (used in create though) */
904 req
->FileAttributes
= cpu_to_le32(file_attributes
);
905 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
906 req
->CreateDisposition
= cpu_to_le32(create_disposition
);
907 req
->CreateOptions
= cpu_to_le32(create_options
);
908 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
909 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
)
910 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
912 iov
[0].iov_base
= (char *)req
;
913 /* 4 for rfc1002 length field */
914 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
916 /* MUST set path len (NameLength) to 0 opening root of share */
917 if (uni_path_len
>= 4) {
918 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
919 /* -1 since last byte is buf[0] which is sent below (path) */
921 iov
[1].iov_len
= uni_path_len
;
922 iov
[1].iov_base
= path
;
924 * -1 since last byte is buf[0] which was counted in
927 inc_rfc1001_len(req
, uni_path_len
- 1);
933 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
934 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
937 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
945 *persistent_fid
= rsp
->PersistentFileId
;
946 *volatile_fid
= rsp
->VolatileFileId
;
949 memcpy(buf
, &rsp
->CreationTime
, 32);
950 buf
->AllocationSize
= rsp
->AllocationSize
;
951 buf
->EndOfFile
= rsp
->EndofFile
;
952 buf
->Attributes
= rsp
->FileAttributes
;
953 buf
->NumberOfLinks
= cpu_to_le32(1);
954 buf
->DeletePending
= 0;
957 free_rsp_buf(resp_buftype
, rsp
);
962 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
963 u64 persistent_fid
, u64 volatile_fid
)
965 struct smb2_close_req
*req
;
966 struct smb2_close_rsp
*rsp
;
967 struct TCP_Server_Info
*server
;
968 struct cifs_ses
*ses
= tcon
->ses
;
975 if (ses
&& (ses
->server
))
976 server
= ses
->server
;
980 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
984 req
->PersistentFileId
= persistent_fid
;
985 req
->VolatileFileId
= volatile_fid
;
987 iov
[0].iov_base
= (char *)req
;
988 /* 4 for rfc1002 length field */
989 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
991 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
992 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
996 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1005 /* BB FIXME - decode close response, update inode for caching */
1008 free_rsp_buf(resp_buftype
, rsp
);
1013 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1014 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1017 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1018 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1019 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1020 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1023 if (buffer_length
< min_buf_size
) {
1024 cERROR(1, "buffer length %d smaller than minimum size %d",
1025 buffer_length
, min_buf_size
);
1029 /* check if beyond RFC1001 maximum length */
1030 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1031 cERROR(1, "buffer length %d or smb length %d too large",
1032 buffer_length
, smb_len
);
1036 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1037 cERROR(1, "illegal server response, bad offset to data");
1045 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1046 * Caller must free buffer.
1049 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1050 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1054 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1060 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1064 memcpy(data
, begin_of_buf
, buffer_length
);
1070 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1071 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1072 size_t output_len
, size_t min_len
, void *data
)
1074 struct smb2_query_info_req
*req
;
1075 struct smb2_query_info_rsp
*rsp
= NULL
;
1079 struct TCP_Server_Info
*server
;
1080 struct cifs_ses
*ses
= tcon
->ses
;
1082 cFYI(1, "Query Info");
1084 if (ses
&& (ses
->server
))
1085 server
= ses
->server
;
1089 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1093 req
->InfoType
= SMB2_O_INFO_FILE
;
1094 req
->FileInfoClass
= info_class
;
1095 req
->PersistentFileId
= persistent_fid
;
1096 req
->VolatileFileId
= volatile_fid
;
1097 /* 4 for rfc1002 length field and 1 for Buffer */
1098 req
->InputBufferOffset
=
1099 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1100 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1102 iov
[0].iov_base
= (char *)req
;
1103 /* 4 for rfc1002 length field */
1104 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1106 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1108 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1112 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1114 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1115 le32_to_cpu(rsp
->OutputBufferLength
),
1116 &rsp
->hdr
, min_len
, data
);
1119 free_rsp_buf(resp_buftype
, rsp
);
1124 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1125 u64 persistent_fid
, u64 volatile_fid
,
1126 struct smb2_file_all_info
*data
)
1128 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1129 FILE_ALL_INFORMATION
,
1130 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1131 sizeof(struct smb2_file_all_info
), data
);
1135 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1136 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1138 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1139 FILE_INTERNAL_INFORMATION
,
1140 sizeof(struct smb2_file_internal_info
),
1141 sizeof(struct smb2_file_internal_info
), uniqueid
);
1145 * This is a no-op for now. We're not really interested in the reply, but
1146 * rather in the fact that the server sent one and that server->lstrp
1149 * FIXME: maybe we should consider checking that the reply matches request?
1152 smb2_echo_callback(struct mid_q_entry
*mid
)
1154 struct TCP_Server_Info
*server
= mid
->callback_data
;
1155 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1156 unsigned int credits_received
= 1;
1158 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1159 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1161 DeleteMidQEntry(mid
);
1162 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1166 SMB2_echo(struct TCP_Server_Info
*server
)
1168 struct smb2_echo_req
*req
;
1172 cFYI(1, "In echo request");
1174 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1178 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1180 iov
.iov_base
= (char *)req
;
1181 /* 4 for rfc1002 length field */
1182 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1184 rc
= cifs_call_async(server
, &iov
, 1, NULL
, smb2_echo_callback
, server
,
1187 cFYI(1, "Echo request failed: %d", rc
);
1189 cifs_small_buf_release(req
);
1194 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1197 struct smb2_flush_req
*req
;
1198 struct TCP_Server_Info
*server
;
1199 struct cifs_ses
*ses
= tcon
->ses
;
1206 if (ses
&& (ses
->server
))
1207 server
= ses
->server
;
1211 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1215 req
->PersistentFileId
= persistent_fid
;
1216 req
->VolatileFileId
= volatile_fid
;
1218 iov
[0].iov_base
= (char *)req
;
1219 /* 4 for rfc1002 length field */
1220 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1222 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1224 if ((rc
!= 0) && tcon
)
1225 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1227 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1232 * To form a chain of read requests, any read requests after the first should
1233 * have the end_of_chain boolean set to true.
1236 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1237 unsigned int remaining_bytes
, int request_type
)
1240 struct smb2_read_req
*req
= NULL
;
1242 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1245 if (io_parms
->tcon
->ses
->server
== NULL
)
1246 return -ECONNABORTED
;
1248 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1250 req
->PersistentFileId
= io_parms
->persistent_fid
;
1251 req
->VolatileFileId
= io_parms
->volatile_fid
;
1252 req
->ReadChannelInfoOffset
= 0; /* reserved */
1253 req
->ReadChannelInfoLength
= 0; /* reserved */
1254 req
->Channel
= 0; /* reserved */
1255 req
->MinimumCount
= 0;
1256 req
->Length
= cpu_to_le32(io_parms
->length
);
1257 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1259 if (request_type
& CHAINED_REQUEST
) {
1260 if (!(request_type
& END_OF_CHAIN
)) {
1261 /* 4 for rfc1002 length field */
1262 req
->hdr
.NextCommand
=
1263 cpu_to_le32(get_rfc1002_length(req
) + 4);
1264 } else /* END_OF_CHAIN */
1265 req
->hdr
.NextCommand
= 0;
1266 if (request_type
& RELATED_REQUEST
) {
1267 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1269 * Related requests use info from previous read request
1272 req
->hdr
.SessionId
= 0xFFFFFFFF;
1273 req
->hdr
.TreeId
= 0xFFFFFFFF;
1274 req
->PersistentFileId
= 0xFFFFFFFF;
1275 req
->VolatileFileId
= 0xFFFFFFFF;
1278 if (remaining_bytes
> io_parms
->length
)
1279 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1281 req
->RemainingBytes
= 0;
1283 iov
[0].iov_base
= (char *)req
;
1284 /* 4 for rfc1002 length field */
1285 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1290 smb2_readv_callback(struct mid_q_entry
*mid
)
1292 struct cifs_readdata
*rdata
= mid
->callback_data
;
1293 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1294 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1295 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
[0].iov_base
;
1296 unsigned int credits_received
= 1;
1298 cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __func__
,
1299 mid
->mid
, mid
->mid_state
, rdata
->result
, rdata
->bytes
);
1301 switch (mid
->mid_state
) {
1302 case MID_RESPONSE_RECEIVED
:
1303 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1304 /* result already set, check signature */
1305 if (server
->sec_mode
&
1306 (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
)) {
1309 rc
= smb2_verify_signature2(rdata
->iov
, rdata
->nr_iov
,
1312 cERROR(1, "SMB signature verification returned "
1315 /* FIXME: should this be counted toward the initiating task? */
1316 task_io_account_read(rdata
->bytes
);
1317 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1319 case MID_REQUEST_SUBMITTED
:
1320 case MID_RETRY_NEEDED
:
1321 rdata
->result
= -EAGAIN
;
1324 if (rdata
->result
!= -ENODATA
)
1325 rdata
->result
= -EIO
;
1329 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1331 queue_work(cifsiod_wq
, &rdata
->work
);
1332 DeleteMidQEntry(mid
);
1333 add_credits(server
, credits_received
, 0);
1336 /* smb2_async_readv - send an async write, and set up mid to handle result */
1338 smb2_async_readv(struct cifs_readdata
*rdata
)
1341 struct smb2_hdr
*buf
;
1342 struct cifs_io_parms io_parms
;
1344 cFYI(1, "%s: offset=%llu bytes=%u", __func__
,
1345 rdata
->offset
, rdata
->bytes
);
1347 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1348 io_parms
.offset
= rdata
->offset
;
1349 io_parms
.length
= rdata
->bytes
;
1350 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1351 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1352 io_parms
.pid
= rdata
->pid
;
1353 rc
= smb2_new_read_req(&rdata
->iov
[0], &io_parms
, 0, 0);
1357 buf
= (struct smb2_hdr
*)rdata
->iov
[0].iov_base
;
1358 /* 4 for rfc1002 length field */
1359 rdata
->iov
[0].iov_len
= get_rfc1002_length(rdata
->iov
[0].iov_base
) + 4;
1361 kref_get(&rdata
->refcount
);
1362 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, rdata
->iov
, 1,
1363 cifs_readv_receive
, smb2_readv_callback
,
1366 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1368 cifs_small_buf_release(buf
);
1373 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1374 unsigned int *nbytes
, char **buf
, int *buf_type
)
1376 int resp_buftype
, rc
= -EACCES
;
1377 struct smb2_read_rsp
*rsp
= NULL
;
1381 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1385 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1386 &resp_buftype
, CIFS_LOG_ERROR
);
1388 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1390 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1391 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1396 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1397 cERROR(1, "Send error in read = %d", rc
);
1399 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1400 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1401 (*nbytes
> io_parms
->length
)) {
1402 cFYI(1, "bad length %d for count %d", *nbytes
,
1410 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1412 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1413 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1414 *buf
= iov
[0].iov_base
;
1415 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1416 *buf_type
= CIFS_SMALL_BUFFER
;
1417 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1418 *buf_type
= CIFS_LARGE_BUFFER
;
1424 * Check the mid_state and signature on received buffer (if any), and queue the
1425 * workqueue completion task.
1428 smb2_writev_callback(struct mid_q_entry
*mid
)
1430 struct cifs_writedata
*wdata
= mid
->callback_data
;
1431 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1432 unsigned int written
;
1433 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1434 unsigned int credits_received
= 1;
1436 switch (mid
->mid_state
) {
1437 case MID_RESPONSE_RECEIVED
:
1438 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1439 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1440 if (wdata
->result
!= 0)
1443 written
= le32_to_cpu(rsp
->DataLength
);
1445 * Mask off high 16 bits when bytes written as returned
1446 * by the server is greater than bytes requested by the
1447 * client. OS/2 servers are known to set incorrect
1450 if (written
> wdata
->bytes
)
1453 if (written
< wdata
->bytes
)
1454 wdata
->result
= -ENOSPC
;
1456 wdata
->bytes
= written
;
1458 case MID_REQUEST_SUBMITTED
:
1459 case MID_RETRY_NEEDED
:
1460 wdata
->result
= -EAGAIN
;
1463 wdata
->result
= -EIO
;
1468 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1470 queue_work(cifsiod_wq
, &wdata
->work
);
1471 DeleteMidQEntry(mid
);
1472 add_credits(tcon
->ses
->server
, credits_received
, 0);
1475 /* smb2_async_writev - send an async write, and set up mid to handle result */
1477 smb2_async_writev(struct cifs_writedata
*wdata
)
1479 int i
, rc
= -EACCES
;
1480 struct smb2_write_req
*req
= NULL
;
1481 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1482 struct kvec
*iov
= NULL
;
1484 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1486 goto async_writev_out
;
1488 /* 1 iov per page + 1 for header */
1489 iov
= kzalloc((wdata
->nr_pages
+ 1) * sizeof(*iov
), GFP_NOFS
);
1492 goto async_writev_out
;
1495 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1497 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1498 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1499 req
->WriteChannelInfoOffset
= 0;
1500 req
->WriteChannelInfoLength
= 0;
1502 req
->Offset
= cpu_to_le64(wdata
->offset
);
1503 /* 4 for rfc1002 length field */
1504 req
->DataOffset
= cpu_to_le16(
1505 offsetof(struct smb2_write_req
, Buffer
) - 4);
1506 req
->RemainingBytes
= 0;
1508 /* 4 for rfc1002 length field and 1 for Buffer */
1509 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1510 iov
[0].iov_base
= (char *)req
;
1513 * This function should marshal up the page array into the kvec
1514 * array, reserving [0] for the header. It should kmap the pages
1515 * and set the iov_len properly for each one. It may also set
1519 wdata
->marshal_iov(iov
, wdata
);
1522 cFYI(1, "async write at %llu %u bytes", wdata
->offset
, wdata
->bytes
);
1524 req
->Length
= cpu_to_le32(wdata
->bytes
);
1526 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1528 kref_get(&wdata
->refcount
);
1529 rc
= cifs_call_async(tcon
->ses
->server
, iov
, wdata
->nr_pages
+ 1,
1530 NULL
, smb2_writev_callback
, wdata
, 0);
1533 kref_put(&wdata
->refcount
, cifs_writedata_release
);
1535 /* send is done, unmap pages */
1536 for (i
= 0; i
< wdata
->nr_pages
; i
++)
1537 kunmap(wdata
->pages
[i
]);
1540 cifs_small_buf_release(req
);
1546 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1547 * The length field from io_parms must be at least 1 and indicates a number of
1548 * elements with data to write that begins with position 1 in iov array. All
1549 * data length is specified by count.
1552 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1553 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1556 struct smb2_write_req
*req
= NULL
;
1557 struct smb2_write_rsp
*rsp
= NULL
;
1564 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1568 if (io_parms
->tcon
->ses
->server
== NULL
)
1569 return -ECONNABORTED
;
1571 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1573 req
->PersistentFileId
= io_parms
->persistent_fid
;
1574 req
->VolatileFileId
= io_parms
->volatile_fid
;
1575 req
->WriteChannelInfoOffset
= 0;
1576 req
->WriteChannelInfoLength
= 0;
1578 req
->Length
= cpu_to_le32(io_parms
->length
);
1579 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1580 /* 4 for rfc1002 length field */
1581 req
->DataOffset
= cpu_to_le16(
1582 offsetof(struct smb2_write_req
, Buffer
) - 4);
1583 req
->RemainingBytes
= 0;
1585 iov
[0].iov_base
= (char *)req
;
1586 /* 4 for rfc1002 length field and 1 for Buffer */
1587 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1589 /* length of entire message including data to be written */
1590 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1592 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
1596 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
1597 cERROR(1, "Send error in write = %d", rc
);
1599 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
1600 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1601 free_rsp_buf(resp_buftype
, rsp
);
1607 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1608 u64 persistent_fid
, u64 volatile_fid
, int info_class
,
1609 unsigned int num
, void **data
, unsigned int *size
)
1611 struct smb2_set_info_req
*req
;
1612 struct smb2_set_info_rsp
*rsp
= NULL
;
1617 struct TCP_Server_Info
*server
;
1618 struct cifs_ses
*ses
= tcon
->ses
;
1620 if (ses
&& (ses
->server
))
1621 server
= ses
->server
;
1628 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
1632 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
1638 req
->InfoType
= SMB2_O_INFO_FILE
;
1639 req
->FileInfoClass
= info_class
;
1640 req
->PersistentFileId
= persistent_fid
;
1641 req
->VolatileFileId
= volatile_fid
;
1643 /* 4 for RFC1001 length and 1 for Buffer */
1645 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
1646 req
->BufferLength
= cpu_to_le32(*size
);
1648 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
1650 memcpy(req
->Buffer
, *data
, *size
);
1652 iov
[0].iov_base
= (char *)req
;
1653 /* 4 for RFC1001 length */
1654 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1656 for (i
= 1; i
< num
; i
++) {
1657 inc_rfc1001_len(req
, size
[i
]);
1658 le32_add_cpu(&req
->BufferLength
, size
[i
]);
1659 iov
[i
].iov_base
= (char *)data
[i
];
1660 iov
[i
].iov_len
= size
[i
];
1663 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
1664 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
1667 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
1677 free_rsp_buf(resp_buftype
, rsp
);
1683 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
1684 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
1686 struct smb2_file_rename_info info
;
1688 unsigned int size
[2];
1690 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
1692 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
1696 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
1697 /* 0 = fail if target already exists */
1698 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
1699 info
.FileNameLength
= cpu_to_le32(len
);
1702 size
[0] = sizeof(struct smb2_file_rename_info
);
1704 data
[1] = target_file
;
1705 size
[1] = len
+ 2 /* null */;
1707 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1708 FILE_RENAME_INFORMATION
, 2, data
, size
);
1714 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
1715 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
1717 struct smb2_file_link_info info
;
1719 unsigned int size
[2];
1721 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
1723 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
1727 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
1728 /* 0 = fail if link already exists */
1729 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
1730 info
.FileNameLength
= cpu_to_le32(len
);
1733 size
[0] = sizeof(struct smb2_file_link_info
);
1735 data
[1] = target_file
;
1736 size
[1] = len
+ 2 /* null */;
1738 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1739 FILE_LINK_INFORMATION
, 2, data
, size
);