4 * Copyright (C) International Business Machines Corp., 2009, 2011
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
9 * Contains the routines for constructing the SMB2 PDUs themselves
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
32 #include <linux/kernel.h>
33 #include <linux/vfs.h>
34 #include <linux/task_io_accounting_ops.h>
35 #include <linux/uaccess.h>
36 #include <linux/pagemap.h>
37 #include <linux/xattr.h>
41 #include "cifsproto.h"
42 #include "smb2proto.h"
43 #include "cifs_unicode.h"
44 #include "cifs_debug.h"
46 #include "smb2status.h"
51 * The following table defines the expected "StructureSize" of SMB2 requests
52 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
54 * Note that commands are defined in smb2pdu.h in le16 but the array below is
55 * indexed by command in host byte order.
57 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
58 /* SMB2_NEGOTIATE */ 36,
59 /* SMB2_SESSION_SETUP */ 25,
61 /* SMB2_TREE_CONNECT */ 9,
62 /* SMB2_TREE_DISCONNECT */ 4,
72 /* SMB2_QUERY_DIRECTORY */ 33,
73 /* SMB2_CHANGE_NOTIFY */ 32,
74 /* SMB2_QUERY_INFO */ 41,
75 /* SMB2_SET_INFO */ 33,
76 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
81 smb2_hdr_assemble(struct smb2_hdr
*hdr
, __le16 smb2_cmd
/* command */ ,
82 const struct cifs_tcon
*tcon
)
84 struct smb2_pdu
*pdu
= (struct smb2_pdu
*)hdr
;
85 char *temp
= (char *)hdr
;
86 /* lookup word count ie StructureSize from table */
87 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_cmd
)];
90 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
91 * largest operations (Create)
95 /* Note this is only network field converted to big endian */
96 hdr
->smb2_buf_length
= cpu_to_be32(parmsize
+ sizeof(struct smb2_hdr
)
97 - 4 /* RFC 1001 length field itself not counted */);
99 hdr
->ProtocolId
[0] = 0xFE;
100 hdr
->ProtocolId
[1] = 'S';
101 hdr
->ProtocolId
[2] = 'M';
102 hdr
->ProtocolId
[3] = 'B';
103 hdr
->StructureSize
= cpu_to_le16(64);
104 hdr
->Command
= smb2_cmd
;
105 hdr
->CreditRequest
= cpu_to_le16(2); /* BB make this dynamic */
106 hdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
111 hdr
->TreeId
= tcon
->tid
;
112 /* Uid is not converted */
114 hdr
->SessionId
= tcon
->ses
->Suid
;
115 /* BB check following DFS flags BB */
116 /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */
117 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
)
118 hdr
->Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
119 /* BB how does SMB2 do case sensitive? */
121 hdr->Flags |= SMBFLG_CASELESS; */
122 if (tcon
->ses
&& tcon
->ses
->server
&&
123 (tcon
->ses
->server
->sec_mode
& SECMODE_SIGN_REQUIRED
))
124 hdr
->Flags
|= SMB2_FLAGS_SIGNED
;
126 pdu
->StructureSize2
= cpu_to_le16(parmsize
);
131 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
134 struct nls_table
*nls_codepage
;
135 struct cifs_ses
*ses
;
136 struct TCP_Server_Info
*server
;
139 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
140 * check for tcp and smb session status done differently
141 * for those three - in the calling routine.
146 if (smb2_command
== SMB2_TREE_CONNECT
)
149 if (tcon
->tidStatus
== CifsExiting
) {
151 * only tree disconnect, open, and write,
152 * (and ulogoff which does not have tcon)
153 * are allowed as we start force umount.
155 if ((smb2_command
!= SMB2_WRITE
) &&
156 (smb2_command
!= SMB2_CREATE
) &&
157 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
158 cFYI(1, "can not send cmd %d while umounting",
163 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
164 (!tcon
->ses
->server
))
168 server
= ses
->server
;
171 * Give demultiplex thread up to 10 seconds to reconnect, should be
172 * greater than cifs socket timeout which is 7 seconds
174 while (server
->tcpStatus
== CifsNeedReconnect
) {
176 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
177 * here since they are implicitly done when session drops.
179 switch (smb2_command
) {
181 * BB Should we keep oplock break and add flush to exceptions?
183 case SMB2_TREE_DISCONNECT
:
186 case SMB2_OPLOCK_BREAK
:
190 wait_event_interruptible_timeout(server
->response_q
,
191 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
193 /* are we still trying to reconnect? */
194 if (server
->tcpStatus
!= CifsNeedReconnect
)
198 * on "soft" mounts we wait once. Hard mounts keep
199 * retrying until process is killed or server comes
203 cFYI(1, "gave up waiting on reconnect in smb_init");
208 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
211 nls_codepage
= load_nls_default();
214 * need to prevent multiple threads trying to simultaneously reconnect
215 * the same SMB session
217 mutex_lock(&tcon
->ses
->session_mutex
);
218 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
219 if (!rc
&& tcon
->ses
->need_reconnect
)
220 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
222 if (rc
|| !tcon
->need_reconnect
) {
223 mutex_unlock(&tcon
->ses
->session_mutex
);
227 cifs_mark_open_files_invalid(tcon
);
228 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
229 mutex_unlock(&tcon
->ses
->session_mutex
);
230 cFYI(1, "reconnect tcon rc = %d", rc
);
233 atomic_inc(&tconInfoReconnectCount
);
235 * BB FIXME add code to check if wsize needs update due to negotiated
236 * smb buffer size shrinking.
240 * Check if handle based operation so we know whether we can continue
241 * or not without returning to caller to reset file handle.
244 * BB Is flush done by server on drop of tcp session? Should we special
245 * case it and skip above?
247 switch (smb2_command
) {
253 case SMB2_QUERY_DIRECTORY
:
254 case SMB2_CHANGE_NOTIFY
:
255 case SMB2_QUERY_INFO
:
259 unload_nls(nls_codepage
);
264 * Allocate and return pointer to an SMB request hdr, and set basic
265 * SMB information in the SMB header. If the return code is zero, this
266 * function must have filled in request_buf pointer.
269 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
274 rc
= smb2_reconnect(smb2_command
, tcon
);
278 /* BB eventually switch this to SMB2 specific small buf size */
279 *request_buf
= cifs_small_buf_get();
280 if (*request_buf
== NULL
) {
281 /* BB should we add a retry in here if not a writepage? */
285 smb2_hdr_assemble((struct smb2_hdr
*) *request_buf
, smb2_command
, tcon
);
288 #ifdef CONFIG_CIFS_STATS2
289 uint16_t com_code
= le16_to_cpu(smb2_command
);
290 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
292 cifs_stats_inc(&tcon
->num_smbs_sent
);
299 free_rsp_buf(int resp_buftype
, void *rsp
)
301 if (resp_buftype
== CIFS_SMALL_BUFFER
)
302 cifs_small_buf_release(rsp
);
303 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
304 cifs_buf_release(rsp
);
307 #define SMB2_NUM_PROT 1
311 #define BAD_PROT 0xFFFF
313 #define SMB2_PROT_ID 0x0202
314 #define SMB21_PROT_ID 0x0210
315 #define BAD_PROT_ID 0xFFFF
320 } smb2protocols
[] = {
321 {SMB2_PROT
, cpu_to_le16(SMB2_PROT_ID
)},
322 {SMB21_PROT
, cpu_to_le16(SMB21_PROT_ID
)},
323 {BAD_PROT
, cpu_to_le16(BAD_PROT_ID
)}
328 * SMB2 Worker functions follow:
330 * The general structure of the worker functions is:
331 * 1) Call smb2_init (assembles SMB2 header)
332 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
333 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
334 * 4) Decode SMB2 command specific fields in the fixed length area
335 * 5) Decode variable length data area (if any for this SMB2 command type)
336 * 6) Call free smb buffer
342 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
344 struct smb2_negotiate_req
*req
;
345 struct smb2_negotiate_rsp
*rsp
;
349 struct TCP_Server_Info
*server
;
350 unsigned int sec_flags
;
353 int blob_offset
, blob_length
;
355 int flags
= CIFS_NEG_OP
;
357 cFYI(1, "Negotiate protocol");
360 server
= ses
->server
;
366 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
370 /* if any of auth flags (ie not sign or seal) are overriden use them */
371 if (ses
->overrideSecFlg
& (~(CIFSSEC_MUST_SIGN
| CIFSSEC_MUST_SEAL
)))
372 sec_flags
= ses
->overrideSecFlg
; /* BB FIXME fix sign flags?*/
373 else /* if override flags set only sign/seal OR them with global auth */
374 sec_flags
= global_secflags
| ses
->overrideSecFlg
;
376 cFYI(1, "sec_flags 0x%x", sec_flags
);
378 req
->hdr
.SessionId
= 0;
380 for (i
= 0; i
< SMB2_NUM_PROT
; i
++)
381 req
->Dialects
[i
] = smb2protocols
[i
].name
;
383 req
->DialectCount
= cpu_to_le16(i
);
384 inc_rfc1001_len(req
, i
* 2);
386 /* only one of SMB2 signing flags may be set in SMB2 request */
387 if ((sec_flags
& CIFSSEC_MUST_SIGN
) == CIFSSEC_MUST_SIGN
)
388 temp
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
389 else if (sec_flags
& CIFSSEC_MAY_SIGN
) /* MAY_SIGN is a single flag */
390 temp
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
392 req
->SecurityMode
= cpu_to_le16(temp
);
394 req
->Capabilities
= cpu_to_le32(SMB2_GLOBAL_CAP_DFS
);
396 iov
[0].iov_base
= (char *)req
;
397 /* 4 for rfc1002 length field */
398 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
400 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
);
402 rsp
= (struct smb2_negotiate_rsp
*)iov
[0].iov_base
;
404 * No tcon so can't do
405 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
415 cFYI(1, "mode 0x%x", rsp
->SecurityMode
);
417 if (rsp
->DialectRevision
== smb2protocols
[SMB21_PROT
].name
)
418 cFYI(1, "negotiated smb2.1 dialect");
419 else if (rsp
->DialectRevision
== smb2protocols
[SMB2_PROT
].name
)
420 cFYI(1, "negotiated smb2 dialect");
422 cERROR(1, "Illegal dialect returned by server %d",
423 le16_to_cpu(rsp
->DialectRevision
));
427 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
429 server
->maxBuf
= le32_to_cpu(rsp
->MaxTransactSize
);
430 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
431 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
432 /* BB Do we need to validate the SecurityMode? */
433 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
434 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
436 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
438 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
440 if (blob_length
== 0) {
441 cERROR(1, "missing security blob on negprot");
446 cFYI(1, "sec_flags 0x%x", sec_flags
);
447 if (sec_flags
& CIFSSEC_MUST_SIGN
) {
448 cFYI(1, "Signing required");
449 if (!(server
->sec_mode
& (SMB2_NEGOTIATE_SIGNING_REQUIRED
|
450 SMB2_NEGOTIATE_SIGNING_ENABLED
))) {
451 cERROR(1, "signing required but server lacks support");
455 server
->sec_mode
|= SECMODE_SIGN_REQUIRED
;
456 } else if (sec_flags
& CIFSSEC_MAY_SIGN
) {
457 cFYI(1, "Signing optional");
458 if (server
->sec_mode
& SMB2_NEGOTIATE_SIGNING_REQUIRED
) {
459 cFYI(1, "Server requires signing");
460 server
->sec_mode
|= SECMODE_SIGN_REQUIRED
;
463 ~(SECMODE_SIGN_ENABLED
| SECMODE_SIGN_REQUIRED
);
466 cFYI(1, "Signing disabled");
467 if (server
->sec_mode
& SMB2_NEGOTIATE_SIGNING_REQUIRED
) {
468 cERROR(1, "Server requires packet signing to be enabled"
469 " in /proc/fs/cifs/SecurityFlags.");
474 ~(SECMODE_SIGN_ENABLED
| SECMODE_SIGN_REQUIRED
);
477 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
478 rc
= decode_neg_token_init(security_blob
, blob_length
,
489 free_rsp_buf(resp_buftype
, rsp
);
494 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
495 const struct nls_table
*nls_cp
)
497 struct smb2_sess_setup_req
*req
;
498 struct smb2_sess_setup_rsp
*rsp
= NULL
;
502 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
503 struct TCP_Server_Info
*server
;
504 unsigned int sec_flags
;
508 char *ntlmssp_blob
= NULL
;
509 bool use_spnego
= false; /* else use raw ntlmssp */
511 cFYI(1, "Session Setup");
514 server
= ses
->server
;
521 * If memory allocation is successful, caller of this function
524 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
528 ses
->server
->secType
= RawNTLMSSP
;
530 ssetup_ntlmssp_authenticate
:
531 if (phase
== NtLmChallenge
)
532 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
534 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
538 /* if any of auth flags (ie not sign or seal) are overriden use them */
539 if (ses
->overrideSecFlg
& (~(CIFSSEC_MUST_SIGN
| CIFSSEC_MUST_SEAL
)))
540 sec_flags
= ses
->overrideSecFlg
; /* BB FIXME fix sign flags?*/
541 else /* if override flags set only sign/seal OR them with global auth */
542 sec_flags
= global_secflags
| ses
->overrideSecFlg
;
544 cFYI(1, "sec_flags 0x%x", sec_flags
);
546 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
547 req
->VcNumber
= 0; /* MBZ */
548 /* to enable echos and oplocks */
549 req
->hdr
.CreditRequest
= cpu_to_le16(3);
551 /* only one of SMB2 signing flags may be set in SMB2 request */
552 if ((sec_flags
& CIFSSEC_MUST_SIGN
) == CIFSSEC_MUST_SIGN
)
553 temp
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
554 else if (ses
->server
->sec_mode
& SMB2_NEGOTIATE_SIGNING_REQUIRED
)
555 temp
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
556 else if (sec_flags
& CIFSSEC_MAY_SIGN
) /* MAY_SIGN is a single flag */
557 temp
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
559 req
->SecurityMode
= temp
;
560 req
->Capabilities
= 0;
561 req
->Channel
= 0; /* MBZ */
563 iov
[0].iov_base
= (char *)req
;
564 /* 4 for rfc1002 length field and 1 for pad */
565 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
566 if (phase
== NtLmNegotiate
) {
567 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
569 if (ntlmssp_blob
== NULL
) {
573 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
575 /* blob_length = build_spnego_ntlmssp_blob(
577 sizeof(struct _NEGOTIATE_MESSAGE),
579 /* BB eventually need to add this */
580 cERROR(1, "spnego not supported for SMB2 yet");
585 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
586 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
587 security_blob
= ntlmssp_blob
;
589 } else if (phase
== NtLmAuthenticate
) {
590 req
->hdr
.SessionId
= ses
->Suid
;
591 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
593 if (ntlmssp_blob
== NULL
) {
594 cERROR(1, "failed to malloc ntlmssp blob");
598 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
601 cFYI(1, "build_ntlmssp_auth_blob failed %d", rc
);
602 goto ssetup_exit
; /* BB double check error handling */
605 /* blob_length = build_spnego_ntlmssp_blob(
609 cERROR(1, "spnego not supported for SMB2 yet");
614 security_blob
= ntlmssp_blob
;
617 cERROR(1, "illegal ntlmssp phase");
622 /* Testing shows that buffer offset must be at location of Buffer[0] */
623 req
->SecurityBufferOffset
=
624 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
625 1 /* pad */ - 4 /* rfc1001 len */);
626 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
627 iov
[1].iov_base
= security_blob
;
628 iov
[1].iov_len
= blob_length
;
630 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
632 /* BB add code to build os and lm fields */
634 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, CIFS_LOG_ERROR
);
636 kfree(security_blob
);
637 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
638 if (rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
639 if (phase
!= NtLmNegotiate
) {
640 cERROR(1, "Unexpected more processing error");
643 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
644 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
645 cERROR(1, "Invalid security buffer offset %d",
646 le16_to_cpu(rsp
->SecurityBufferOffset
));
651 /* NTLMSSP Negotiate sent now processing challenge (response) */
652 phase
= NtLmChallenge
; /* process ntlmssp challenge */
653 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
654 ses
->Suid
= rsp
->hdr
.SessionId
;
655 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
656 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
660 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
661 * but at least the raw NTLMSSP case works.
664 * No tcon so can't do
665 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
675 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
677 free_rsp_buf(resp_buftype
, rsp
);
679 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
680 if ((phase
== NtLmChallenge
) && (rc
== 0))
681 goto ssetup_ntlmssp_authenticate
;
686 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
688 struct smb2_logoff_req
*req
; /* response is also trivial struct */
690 struct TCP_Server_Info
*server
;
692 cFYI(1, "disconnect session %p", ses
);
694 if (ses
&& (ses
->server
))
695 server
= ses
->server
;
699 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
703 /* since no tcon, smb2_init can not do this, so do here */
704 req
->hdr
.SessionId
= ses
->Suid
;
705 if (server
->sec_mode
& SECMODE_SIGN_REQUIRED
)
706 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
708 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
710 * No tcon so can't do
711 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
716 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
718 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
721 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
724 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
725 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
727 struct smb2_tree_connect_req
*req
;
728 struct smb2_tree_connect_rsp
*rsp
= NULL
;
733 struct TCP_Server_Info
*server
;
734 __le16
*unc_path
= NULL
;
738 if ((ses
->server
) && tree
)
739 server
= ses
->server
;
743 if (tcon
&& tcon
->bad_network_name
)
746 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
747 if (unc_path
== NULL
)
750 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
752 if (unc_path_len
< 2) {
757 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
764 /* since no tcon, smb2_init can not do this, so do here */
765 req
->hdr
.SessionId
= ses
->Suid
;
766 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
767 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
770 iov
[0].iov_base
= (char *)req
;
771 /* 4 for rfc1002 length field and 1 for pad */
772 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
774 /* Testing shows that buffer offset must be at location of Buffer[0] */
775 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
776 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
777 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
778 iov
[1].iov_base
= unc_path
;
779 iov
[1].iov_len
= unc_path_len
;
781 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
783 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
784 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
788 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
789 tcon
->need_reconnect
= true;
791 goto tcon_error_exit
;
800 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
804 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
805 cFYI(1, "connection to disk share");
806 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
808 cFYI(1, "connection to pipe share");
809 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
811 cFYI(1, "connection to printer");
813 cERROR(1, "unknown share type %d", rsp
->ShareType
);
815 goto tcon_error_exit
;
818 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
819 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
820 tcon
->tidStatus
= CifsGood
;
821 tcon
->need_reconnect
= false;
822 tcon
->tid
= rsp
->hdr
.TreeId
;
823 strncpy(tcon
->treeName
, tree
, MAX_TREE_SIZE
);
825 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
826 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
827 cERROR(1, "DFS capability contradicts DFS flag");
830 free_rsp_buf(resp_buftype
, rsp
);
835 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
836 cERROR(1, "BAD_NETWORK_NAME: %s", tree
);
837 tcon
->bad_network_name
= true;
843 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
845 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
847 struct TCP_Server_Info
*server
;
848 struct cifs_ses
*ses
= tcon
->ses
;
850 cFYI(1, "Tree Disconnect");
852 if (ses
&& (ses
->server
))
853 server
= ses
->server
;
857 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
860 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
864 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
866 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
872 SMB2_open(const unsigned int xid
, struct cifs_tcon
*tcon
, __le16
*path
,
873 u64
*persistent_fid
, u64
*volatile_fid
, __u32 desired_access
,
874 __u32 create_disposition
, __u32 file_attributes
, __u32 create_options
,
875 __u8
*oplock
, struct smb2_file_all_info
*buf
)
877 struct smb2_create_req
*req
;
878 struct smb2_create_rsp
*rsp
;
879 struct TCP_Server_Info
*server
;
880 struct cifs_ses
*ses
= tcon
->ses
;
887 cFYI(1, "create/open");
889 if (ses
&& (ses
->server
))
890 server
= ses
->server
;
894 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
899 req
->RequestedOplockLevel
= *oplock
;
901 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_NONE
;
902 req
->ImpersonationLevel
= IL_IMPERSONATION
;
903 req
->DesiredAccess
= cpu_to_le32(desired_access
);
904 /* File attributes ignored on open (used in create though) */
905 req
->FileAttributes
= cpu_to_le32(file_attributes
);
906 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
907 req
->CreateDisposition
= cpu_to_le32(create_disposition
);
908 req
->CreateOptions
= cpu_to_le32(create_options
);
909 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
910 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
)
911 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
913 iov
[0].iov_base
= (char *)req
;
914 /* 4 for rfc1002 length field */
915 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
917 /* MUST set path len (NameLength) to 0 opening root of share */
918 if (uni_path_len
>= 4) {
919 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
920 /* -1 since last byte is buf[0] which is sent below (path) */
922 iov
[1].iov_len
= uni_path_len
;
923 iov
[1].iov_base
= path
;
925 * -1 since last byte is buf[0] which was counted in
928 inc_rfc1001_len(req
, uni_path_len
- 1);
934 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
935 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
938 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
946 *persistent_fid
= rsp
->PersistentFileId
;
947 *volatile_fid
= rsp
->VolatileFileId
;
950 memcpy(buf
, &rsp
->CreationTime
, 32);
951 buf
->AllocationSize
= rsp
->AllocationSize
;
952 buf
->EndOfFile
= rsp
->EndofFile
;
953 buf
->Attributes
= rsp
->FileAttributes
;
954 buf
->NumberOfLinks
= cpu_to_le32(1);
955 buf
->DeletePending
= 0;
958 *oplock
= rsp
->OplockLevel
;
960 free_rsp_buf(resp_buftype
, rsp
);
965 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
966 u64 persistent_fid
, u64 volatile_fid
)
968 struct smb2_close_req
*req
;
969 struct smb2_close_rsp
*rsp
;
970 struct TCP_Server_Info
*server
;
971 struct cifs_ses
*ses
= tcon
->ses
;
978 if (ses
&& (ses
->server
))
979 server
= ses
->server
;
983 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
987 req
->PersistentFileId
= persistent_fid
;
988 req
->VolatileFileId
= volatile_fid
;
990 iov
[0].iov_base
= (char *)req
;
991 /* 4 for rfc1002 length field */
992 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
994 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
995 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
999 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1008 /* BB FIXME - decode close response, update inode for caching */
1011 free_rsp_buf(resp_buftype
, rsp
);
1016 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1017 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1020 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1021 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1022 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1023 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1026 if (buffer_length
< min_buf_size
) {
1027 cERROR(1, "buffer length %d smaller than minimum size %d",
1028 buffer_length
, min_buf_size
);
1032 /* check if beyond RFC1001 maximum length */
1033 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1034 cERROR(1, "buffer length %d or smb length %d too large",
1035 buffer_length
, smb_len
);
1039 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1040 cERROR(1, "illegal server response, bad offset to data");
1048 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1049 * Caller must free buffer.
1052 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1053 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1057 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1063 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1067 memcpy(data
, begin_of_buf
, buffer_length
);
1073 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1074 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1075 size_t output_len
, size_t min_len
, void *data
)
1077 struct smb2_query_info_req
*req
;
1078 struct smb2_query_info_rsp
*rsp
= NULL
;
1082 struct TCP_Server_Info
*server
;
1083 struct cifs_ses
*ses
= tcon
->ses
;
1085 cFYI(1, "Query Info");
1087 if (ses
&& (ses
->server
))
1088 server
= ses
->server
;
1092 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1096 req
->InfoType
= SMB2_O_INFO_FILE
;
1097 req
->FileInfoClass
= info_class
;
1098 req
->PersistentFileId
= persistent_fid
;
1099 req
->VolatileFileId
= volatile_fid
;
1100 /* 4 for rfc1002 length field and 1 for Buffer */
1101 req
->InputBufferOffset
=
1102 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1103 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1105 iov
[0].iov_base
= (char *)req
;
1106 /* 4 for rfc1002 length field */
1107 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1109 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1111 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1115 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1117 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1118 le32_to_cpu(rsp
->OutputBufferLength
),
1119 &rsp
->hdr
, min_len
, data
);
1122 free_rsp_buf(resp_buftype
, rsp
);
1127 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1128 u64 persistent_fid
, u64 volatile_fid
,
1129 struct smb2_file_all_info
*data
)
1131 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1132 FILE_ALL_INFORMATION
,
1133 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1134 sizeof(struct smb2_file_all_info
), data
);
1138 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1139 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1141 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1142 FILE_INTERNAL_INFORMATION
,
1143 sizeof(struct smb2_file_internal_info
),
1144 sizeof(struct smb2_file_internal_info
), uniqueid
);
1148 * This is a no-op for now. We're not really interested in the reply, but
1149 * rather in the fact that the server sent one and that server->lstrp
1152 * FIXME: maybe we should consider checking that the reply matches request?
1155 smb2_echo_callback(struct mid_q_entry
*mid
)
1157 struct TCP_Server_Info
*server
= mid
->callback_data
;
1158 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1159 unsigned int credits_received
= 1;
1161 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1162 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1164 DeleteMidQEntry(mid
);
1165 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1169 SMB2_echo(struct TCP_Server_Info
*server
)
1171 struct smb2_echo_req
*req
;
1175 cFYI(1, "In echo request");
1177 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1181 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1183 iov
.iov_base
= (char *)req
;
1184 /* 4 for rfc1002 length field */
1185 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1187 rc
= cifs_call_async(server
, &iov
, 1, NULL
, smb2_echo_callback
, server
,
1190 cFYI(1, "Echo request failed: %d", rc
);
1192 cifs_small_buf_release(req
);
1197 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1200 struct smb2_flush_req
*req
;
1201 struct TCP_Server_Info
*server
;
1202 struct cifs_ses
*ses
= tcon
->ses
;
1209 if (ses
&& (ses
->server
))
1210 server
= ses
->server
;
1214 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1218 req
->PersistentFileId
= persistent_fid
;
1219 req
->VolatileFileId
= volatile_fid
;
1221 iov
[0].iov_base
= (char *)req
;
1222 /* 4 for rfc1002 length field */
1223 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1225 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1227 if ((rc
!= 0) && tcon
)
1228 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1230 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1235 * To form a chain of read requests, any read requests after the first should
1236 * have the end_of_chain boolean set to true.
1239 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1240 unsigned int remaining_bytes
, int request_type
)
1243 struct smb2_read_req
*req
= NULL
;
1245 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1248 if (io_parms
->tcon
->ses
->server
== NULL
)
1249 return -ECONNABORTED
;
1251 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1253 req
->PersistentFileId
= io_parms
->persistent_fid
;
1254 req
->VolatileFileId
= io_parms
->volatile_fid
;
1255 req
->ReadChannelInfoOffset
= 0; /* reserved */
1256 req
->ReadChannelInfoLength
= 0; /* reserved */
1257 req
->Channel
= 0; /* reserved */
1258 req
->MinimumCount
= 0;
1259 req
->Length
= cpu_to_le32(io_parms
->length
);
1260 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1262 if (request_type
& CHAINED_REQUEST
) {
1263 if (!(request_type
& END_OF_CHAIN
)) {
1264 /* 4 for rfc1002 length field */
1265 req
->hdr
.NextCommand
=
1266 cpu_to_le32(get_rfc1002_length(req
) + 4);
1267 } else /* END_OF_CHAIN */
1268 req
->hdr
.NextCommand
= 0;
1269 if (request_type
& RELATED_REQUEST
) {
1270 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1272 * Related requests use info from previous read request
1275 req
->hdr
.SessionId
= 0xFFFFFFFF;
1276 req
->hdr
.TreeId
= 0xFFFFFFFF;
1277 req
->PersistentFileId
= 0xFFFFFFFF;
1278 req
->VolatileFileId
= 0xFFFFFFFF;
1281 if (remaining_bytes
> io_parms
->length
)
1282 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1284 req
->RemainingBytes
= 0;
1286 iov
[0].iov_base
= (char *)req
;
1287 /* 4 for rfc1002 length field */
1288 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1293 smb2_readv_callback(struct mid_q_entry
*mid
)
1295 struct cifs_readdata
*rdata
= mid
->callback_data
;
1296 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1297 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1298 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
[0].iov_base
;
1299 unsigned int credits_received
= 1;
1301 cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __func__
,
1302 mid
->mid
, mid
->mid_state
, rdata
->result
, rdata
->bytes
);
1304 switch (mid
->mid_state
) {
1305 case MID_RESPONSE_RECEIVED
:
1306 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1307 /* result already set, check signature */
1308 if (server
->sec_mode
&
1309 (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
)) {
1312 rc
= smb2_verify_signature2(rdata
->iov
, rdata
->nr_iov
,
1315 cERROR(1, "SMB signature verification returned "
1318 /* FIXME: should this be counted toward the initiating task? */
1319 task_io_account_read(rdata
->bytes
);
1320 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1322 case MID_REQUEST_SUBMITTED
:
1323 case MID_RETRY_NEEDED
:
1324 rdata
->result
= -EAGAIN
;
1327 if (rdata
->result
!= -ENODATA
)
1328 rdata
->result
= -EIO
;
1332 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1334 queue_work(cifsiod_wq
, &rdata
->work
);
1335 DeleteMidQEntry(mid
);
1336 add_credits(server
, credits_received
, 0);
1339 /* smb2_async_readv - send an async write, and set up mid to handle result */
1341 smb2_async_readv(struct cifs_readdata
*rdata
)
1344 struct smb2_hdr
*buf
;
1345 struct cifs_io_parms io_parms
;
1347 cFYI(1, "%s: offset=%llu bytes=%u", __func__
,
1348 rdata
->offset
, rdata
->bytes
);
1350 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1351 io_parms
.offset
= rdata
->offset
;
1352 io_parms
.length
= rdata
->bytes
;
1353 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1354 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1355 io_parms
.pid
= rdata
->pid
;
1356 rc
= smb2_new_read_req(&rdata
->iov
[0], &io_parms
, 0, 0);
1360 buf
= (struct smb2_hdr
*)rdata
->iov
[0].iov_base
;
1361 /* 4 for rfc1002 length field */
1362 rdata
->iov
[0].iov_len
= get_rfc1002_length(rdata
->iov
[0].iov_base
) + 4;
1364 kref_get(&rdata
->refcount
);
1365 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, rdata
->iov
, 1,
1366 cifs_readv_receive
, smb2_readv_callback
,
1369 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1371 cifs_small_buf_release(buf
);
1376 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1377 unsigned int *nbytes
, char **buf
, int *buf_type
)
1379 int resp_buftype
, rc
= -EACCES
;
1380 struct smb2_read_rsp
*rsp
= NULL
;
1384 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1388 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1389 &resp_buftype
, CIFS_LOG_ERROR
);
1391 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1393 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1394 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1399 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1400 cERROR(1, "Send error in read = %d", rc
);
1402 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1403 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1404 (*nbytes
> io_parms
->length
)) {
1405 cFYI(1, "bad length %d for count %d", *nbytes
,
1413 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1415 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1416 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1417 *buf
= iov
[0].iov_base
;
1418 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1419 *buf_type
= CIFS_SMALL_BUFFER
;
1420 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1421 *buf_type
= CIFS_LARGE_BUFFER
;
1427 * Check the mid_state and signature on received buffer (if any), and queue the
1428 * workqueue completion task.
1431 smb2_writev_callback(struct mid_q_entry
*mid
)
1433 struct cifs_writedata
*wdata
= mid
->callback_data
;
1434 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1435 unsigned int written
;
1436 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1437 unsigned int credits_received
= 1;
1439 switch (mid
->mid_state
) {
1440 case MID_RESPONSE_RECEIVED
:
1441 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1442 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1443 if (wdata
->result
!= 0)
1446 written
= le32_to_cpu(rsp
->DataLength
);
1448 * Mask off high 16 bits when bytes written as returned
1449 * by the server is greater than bytes requested by the
1450 * client. OS/2 servers are known to set incorrect
1453 if (written
> wdata
->bytes
)
1456 if (written
< wdata
->bytes
)
1457 wdata
->result
= -ENOSPC
;
1459 wdata
->bytes
= written
;
1461 case MID_REQUEST_SUBMITTED
:
1462 case MID_RETRY_NEEDED
:
1463 wdata
->result
= -EAGAIN
;
1466 wdata
->result
= -EIO
;
1471 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1473 queue_work(cifsiod_wq
, &wdata
->work
);
1474 DeleteMidQEntry(mid
);
1475 add_credits(tcon
->ses
->server
, credits_received
, 0);
1478 /* smb2_async_writev - send an async write, and set up mid to handle result */
1480 smb2_async_writev(struct cifs_writedata
*wdata
)
1482 int i
, rc
= -EACCES
;
1483 struct smb2_write_req
*req
= NULL
;
1484 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1485 struct kvec
*iov
= NULL
;
1487 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1489 goto async_writev_out
;
1491 /* 1 iov per page + 1 for header */
1492 iov
= kzalloc((wdata
->nr_pages
+ 1) * sizeof(*iov
), GFP_NOFS
);
1495 goto async_writev_out
;
1498 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1500 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1501 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1502 req
->WriteChannelInfoOffset
= 0;
1503 req
->WriteChannelInfoLength
= 0;
1505 req
->Offset
= cpu_to_le64(wdata
->offset
);
1506 /* 4 for rfc1002 length field */
1507 req
->DataOffset
= cpu_to_le16(
1508 offsetof(struct smb2_write_req
, Buffer
) - 4);
1509 req
->RemainingBytes
= 0;
1511 /* 4 for rfc1002 length field and 1 for Buffer */
1512 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1513 iov
[0].iov_base
= (char *)req
;
1516 * This function should marshal up the page array into the kvec
1517 * array, reserving [0] for the header. It should kmap the pages
1518 * and set the iov_len properly for each one. It may also set
1522 wdata
->marshal_iov(iov
, wdata
);
1525 cFYI(1, "async write at %llu %u bytes", wdata
->offset
, wdata
->bytes
);
1527 req
->Length
= cpu_to_le32(wdata
->bytes
);
1529 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1531 kref_get(&wdata
->refcount
);
1532 rc
= cifs_call_async(tcon
->ses
->server
, iov
, wdata
->nr_pages
+ 1,
1533 NULL
, smb2_writev_callback
, wdata
, 0);
1536 kref_put(&wdata
->refcount
, cifs_writedata_release
);
1538 /* send is done, unmap pages */
1539 for (i
= 0; i
< wdata
->nr_pages
; i
++)
1540 kunmap(wdata
->pages
[i
]);
1543 cifs_small_buf_release(req
);
1549 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1550 * The length field from io_parms must be at least 1 and indicates a number of
1551 * elements with data to write that begins with position 1 in iov array. All
1552 * data length is specified by count.
1555 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1556 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1559 struct smb2_write_req
*req
= NULL
;
1560 struct smb2_write_rsp
*rsp
= NULL
;
1567 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1571 if (io_parms
->tcon
->ses
->server
== NULL
)
1572 return -ECONNABORTED
;
1574 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1576 req
->PersistentFileId
= io_parms
->persistent_fid
;
1577 req
->VolatileFileId
= io_parms
->volatile_fid
;
1578 req
->WriteChannelInfoOffset
= 0;
1579 req
->WriteChannelInfoLength
= 0;
1581 req
->Length
= cpu_to_le32(io_parms
->length
);
1582 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1583 /* 4 for rfc1002 length field */
1584 req
->DataOffset
= cpu_to_le16(
1585 offsetof(struct smb2_write_req
, Buffer
) - 4);
1586 req
->RemainingBytes
= 0;
1588 iov
[0].iov_base
= (char *)req
;
1589 /* 4 for rfc1002 length field and 1 for Buffer */
1590 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1592 /* length of entire message including data to be written */
1593 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1595 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
1599 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
1600 cERROR(1, "Send error in write = %d", rc
);
1602 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
1603 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1604 free_rsp_buf(resp_buftype
, rsp
);
1610 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
1613 unsigned int entrycount
= 0;
1614 unsigned int next_offset
= 0;
1615 FILE_DIRECTORY_INFO
*entryptr
;
1617 if (bufstart
== NULL
)
1620 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
1623 entryptr
= (FILE_DIRECTORY_INFO
*)
1624 ((char *)entryptr
+ next_offset
);
1626 if ((char *)entryptr
+ size
> end_of_buf
) {
1627 cERROR(1, "malformed search entry would overflow");
1631 len
= le32_to_cpu(entryptr
->FileNameLength
);
1632 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
1633 cERROR(1, "directory entry name would overflow frame "
1634 "end of buf %p", end_of_buf
);
1638 *lastentry
= (char *)entryptr
;
1641 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
1653 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
1654 u64 persistent_fid
, u64 volatile_fid
, int index
,
1655 struct cifs_search_info
*srch_inf
)
1657 struct smb2_query_directory_req
*req
;
1658 struct smb2_query_directory_rsp
*rsp
= NULL
;
1663 unsigned char *bufptr
;
1664 struct TCP_Server_Info
*server
;
1665 struct cifs_ses
*ses
= tcon
->ses
;
1666 __le16 asteriks
= cpu_to_le16('*');
1668 unsigned int output_size
= CIFSMaxBufSize
;
1669 size_t info_buf_size
;
1671 if (ses
&& (ses
->server
))
1672 server
= ses
->server
;
1676 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
1680 switch (srch_inf
->info_level
) {
1681 case SMB_FIND_FILE_DIRECTORY_INFO
:
1682 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
1683 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
1685 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
1686 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
1687 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
1690 cERROR(1, "info level %u isn't supported",
1691 srch_inf
->info_level
);
1696 req
->FileIndex
= cpu_to_le32(index
);
1697 req
->PersistentFileId
= persistent_fid
;
1698 req
->VolatileFileId
= volatile_fid
;
1701 bufptr
= req
->Buffer
;
1702 memcpy(bufptr
, &asteriks
, len
);
1704 req
->FileNameOffset
=
1705 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
1706 req
->FileNameLength
= cpu_to_le16(len
);
1708 * BB could be 30 bytes or so longer if we used SMB2 specific
1709 * buffer lengths, but this is safe and close enough.
1711 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
1712 output_size
= min_t(unsigned int, output_size
, 2 << 15);
1713 req
->OutputBufferLength
= cpu_to_le32(output_size
);
1715 iov
[0].iov_base
= (char *)req
;
1716 /* 4 for RFC1001 length and 1 for Buffer */
1717 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1719 iov
[1].iov_base
= (char *)(req
->Buffer
);
1720 iov
[1].iov_len
= len
;
1722 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
1724 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
1726 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
1729 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
1731 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1732 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
1737 srch_inf
->unicode
= true;
1739 if (srch_inf
->ntwrk_buf_start
) {
1740 if (srch_inf
->smallBuf
)
1741 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
1743 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
1745 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
1746 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
1747 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
1748 /* 4 for rfc1002 length field */
1749 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
1750 srch_inf
->entries_in_buffer
=
1751 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
1752 &srch_inf
->last_entry
, info_buf_size
);
1753 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
1754 cFYI(1, "num entries %d last_index %lld srch start %p srch end %p",
1755 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
1756 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
1757 if (resp_buftype
== CIFS_LARGE_BUFFER
)
1758 srch_inf
->smallBuf
= false;
1759 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
1760 srch_inf
->smallBuf
= true;
1762 cERROR(1, "illegal search buffer type");
1764 if (rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
)
1765 srch_inf
->endOfSearch
= 1;
1767 srch_inf
->endOfSearch
= 0;
1772 free_rsp_buf(resp_buftype
, rsp
);
1777 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1778 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
1779 unsigned int num
, void **data
, unsigned int *size
)
1781 struct smb2_set_info_req
*req
;
1782 struct smb2_set_info_rsp
*rsp
= NULL
;
1787 struct TCP_Server_Info
*server
;
1788 struct cifs_ses
*ses
= tcon
->ses
;
1790 if (ses
&& (ses
->server
))
1791 server
= ses
->server
;
1798 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
1802 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
1808 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
1810 req
->InfoType
= SMB2_O_INFO_FILE
;
1811 req
->FileInfoClass
= info_class
;
1812 req
->PersistentFileId
= persistent_fid
;
1813 req
->VolatileFileId
= volatile_fid
;
1815 /* 4 for RFC1001 length and 1 for Buffer */
1817 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
1818 req
->BufferLength
= cpu_to_le32(*size
);
1820 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
1822 memcpy(req
->Buffer
, *data
, *size
);
1824 iov
[0].iov_base
= (char *)req
;
1825 /* 4 for RFC1001 length */
1826 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1828 for (i
= 1; i
< num
; i
++) {
1829 inc_rfc1001_len(req
, size
[i
]);
1830 le32_add_cpu(&req
->BufferLength
, size
[i
]);
1831 iov
[i
].iov_base
= (char *)data
[i
];
1832 iov
[i
].iov_len
= size
[i
];
1835 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
1836 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
1839 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
1849 free_rsp_buf(resp_buftype
, rsp
);
1855 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
1856 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
1858 struct smb2_file_rename_info info
;
1860 unsigned int size
[2];
1862 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
1864 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
1868 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
1869 /* 0 = fail if target already exists */
1870 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
1871 info
.FileNameLength
= cpu_to_le32(len
);
1874 size
[0] = sizeof(struct smb2_file_rename_info
);
1876 data
[1] = target_file
;
1877 size
[1] = len
+ 2 /* null */;
1879 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1880 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
1887 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
1888 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
1890 struct smb2_file_link_info info
;
1892 unsigned int size
[2];
1894 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
1896 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
1900 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
1901 /* 0 = fail if link already exists */
1902 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
1903 info
.FileNameLength
= cpu_to_le32(len
);
1906 size
[0] = sizeof(struct smb2_file_link_info
);
1908 data
[1] = target_file
;
1909 size
[1] = len
+ 2 /* null */;
1911 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1912 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
1918 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1919 u64 volatile_fid
, u32 pid
, __le64
*eof
)
1921 struct smb2_file_eof_info info
;
1925 info
.EndOfFile
= *eof
;
1928 size
= sizeof(struct smb2_file_eof_info
);
1930 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
1931 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
1935 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1936 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
1939 size
= sizeof(FILE_BASIC_INFO
);
1940 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1941 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
1942 (void **)&buf
, &size
);