4 * Copyright (C) International Business Machines Corp., 2009, 2013
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 /* BB FIXME when we do write > 64K add +1 for every 64K in req or rsp */
112 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
113 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
115 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
116 hdr
->CreditCharge
= cpu_to_le16(1);
117 /* else CreditCharge MBZ */
119 hdr
->TreeId
= tcon
->tid
;
120 /* Uid is not converted */
122 hdr
->SessionId
= tcon
->ses
->Suid
;
125 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
126 * to pass the path on the Open SMB prefixed by \\server\share.
127 * Not sure when we would need to do the augmented path (if ever) and
128 * setting this flag breaks the SMB2 open operation since it is
129 * illegal to send an empty path name (without \\server\share prefix)
130 * when the DFS flag is set in the SMB open header. We could
131 * consider setting the flag on all operations other than open
132 * but it is safer to net set it for now.
134 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
135 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
137 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
)
138 hdr
->Flags
|= SMB2_FLAGS_SIGNED
;
140 pdu
->StructureSize2
= cpu_to_le16(parmsize
);
145 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
148 struct nls_table
*nls_codepage
;
149 struct cifs_ses
*ses
;
150 struct TCP_Server_Info
*server
;
153 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
154 * check for tcp and smb session status done differently
155 * for those three - in the calling routine.
160 if (smb2_command
== SMB2_TREE_CONNECT
)
163 if (tcon
->tidStatus
== CifsExiting
) {
165 * only tree disconnect, open, and write,
166 * (and ulogoff which does not have tcon)
167 * are allowed as we start force umount.
169 if ((smb2_command
!= SMB2_WRITE
) &&
170 (smb2_command
!= SMB2_CREATE
) &&
171 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
172 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
177 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
178 (!tcon
->ses
->server
))
182 server
= ses
->server
;
185 * Give demultiplex thread up to 10 seconds to reconnect, should be
186 * greater than cifs socket timeout which is 7 seconds
188 while (server
->tcpStatus
== CifsNeedReconnect
) {
190 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
191 * here since they are implicitly done when session drops.
193 switch (smb2_command
) {
195 * BB Should we keep oplock break and add flush to exceptions?
197 case SMB2_TREE_DISCONNECT
:
200 case SMB2_OPLOCK_BREAK
:
204 wait_event_interruptible_timeout(server
->response_q
,
205 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
207 /* are we still trying to reconnect? */
208 if (server
->tcpStatus
!= CifsNeedReconnect
)
212 * on "soft" mounts we wait once. Hard mounts keep
213 * retrying until process is killed or server comes
217 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
222 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
225 nls_codepage
= load_nls_default();
228 * need to prevent multiple threads trying to simultaneously reconnect
229 * the same SMB session
231 mutex_lock(&tcon
->ses
->session_mutex
);
232 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
233 if (!rc
&& tcon
->ses
->need_reconnect
)
234 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
236 if (rc
|| !tcon
->need_reconnect
) {
237 mutex_unlock(&tcon
->ses
->session_mutex
);
241 cifs_mark_open_files_invalid(tcon
);
242 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
243 mutex_unlock(&tcon
->ses
->session_mutex
);
244 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
247 atomic_inc(&tconInfoReconnectCount
);
249 * BB FIXME add code to check if wsize needs update due to negotiated
250 * smb buffer size shrinking.
254 * Check if handle based operation so we know whether we can continue
255 * or not without returning to caller to reset file handle.
258 * BB Is flush done by server on drop of tcp session? Should we special
259 * case it and skip above?
261 switch (smb2_command
) {
267 case SMB2_QUERY_DIRECTORY
:
268 case SMB2_CHANGE_NOTIFY
:
269 case SMB2_QUERY_INFO
:
273 unload_nls(nls_codepage
);
278 * Allocate and return pointer to an SMB request hdr, and set basic
279 * SMB information in the SMB header. If the return code is zero, this
280 * function must have filled in request_buf pointer.
283 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
288 rc
= smb2_reconnect(smb2_command
, tcon
);
292 /* BB eventually switch this to SMB2 specific small buf size */
293 *request_buf
= cifs_small_buf_get();
294 if (*request_buf
== NULL
) {
295 /* BB should we add a retry in here if not a writepage? */
299 smb2_hdr_assemble((struct smb2_hdr
*) *request_buf
, smb2_command
, tcon
);
302 #ifdef CONFIG_CIFS_STATS2
303 uint16_t com_code
= le16_to_cpu(smb2_command
);
304 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
306 cifs_stats_inc(&tcon
->num_smbs_sent
);
313 free_rsp_buf(int resp_buftype
, void *rsp
)
315 if (resp_buftype
== CIFS_SMALL_BUFFER
)
316 cifs_small_buf_release(rsp
);
317 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
318 cifs_buf_release(rsp
);
324 * SMB2 Worker functions follow:
326 * The general structure of the worker functions is:
327 * 1) Call smb2_init (assembles SMB2 header)
328 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
329 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
330 * 4) Decode SMB2 command specific fields in the fixed length area
331 * 5) Decode variable length data area (if any for this SMB2 command type)
332 * 6) Call free smb buffer
338 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
340 struct smb2_negotiate_req
*req
;
341 struct smb2_negotiate_rsp
*rsp
;
345 struct TCP_Server_Info
*server
= ses
->server
;
346 int blob_offset
, blob_length
;
348 int flags
= CIFS_NEG_OP
;
350 cifs_dbg(FYI
, "Negotiate protocol\n");
353 WARN(1, "%s: server is NULL!\n", __func__
);
357 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
361 req
->hdr
.SessionId
= 0;
363 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
365 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
366 inc_rfc1001_len(req
, 2);
368 /* only one of SMB2 signing flags may be set in SMB2 request */
370 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
371 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
372 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
374 req
->SecurityMode
= 0;
376 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
378 /* ClientGUID must be zero for SMB2.02 dialect */
379 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
380 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
382 memcpy(req
->ClientGUID
, server
->client_guid
,
383 SMB2_CLIENT_GUID_SIZE
);
385 iov
[0].iov_base
= (char *)req
;
386 /* 4 for rfc1002 length field */
387 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
389 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
);
391 rsp
= (struct smb2_negotiate_rsp
*)iov
[0].iov_base
;
393 * No tcon so can't do
394 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
399 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
401 /* BB we may eventually want to match the negotiated vs. requested
402 dialect, even though we are only requesting one at a time */
403 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
404 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
405 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
406 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
407 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
408 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
409 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
410 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
412 cifs_dbg(VFS
, "Illegal dialect returned by server %d\n",
413 le16_to_cpu(rsp
->DialectRevision
));
417 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
419 /* SMB2 only has an extended negflavor */
420 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
421 /* set it to the maximum buffer size value we can send with 1 credit */
422 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
423 SMB2_MAX_BUFFER_SIZE
);
424 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
425 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
426 /* BB Do we need to validate the SecurityMode? */
427 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
428 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
430 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
432 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
435 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
437 * ses->sectype = RawNTLMSSP;
438 * but for time being this is our only auth choice so doesn't matter.
439 * We just found a server which sets blob length to zero expecting raw.
441 if (blob_length
== 0)
442 cifs_dbg(FYI
, "missing security blob on negprot\n");
444 rc
= cifs_enable_signing(server
, ses
->sign
);
445 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
449 rc
= decode_neg_token_init(security_blob
, blob_length
,
460 free_rsp_buf(resp_buftype
, rsp
);
464 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
467 struct validate_negotiate_info_req vneg_inbuf
;
468 struct validate_negotiate_info_rsp
*pneg_rsp
;
471 cifs_dbg(FYI
, "validate negotiate\n");
474 * validation ioctl must be signed, so no point sending this if we
475 * can not sign it. We could eventually change this to selectively
476 * sign just this, the first and only signed request on a connection.
477 * This is good enough for now since a user who wants better security
478 * would also enable signing on the mount. Having validation of
479 * negotiate info for signed connections helps reduce attack vectors
481 if (tcon
->ses
->server
->sign
== false)
482 return 0; /* validation requires signing */
484 vneg_inbuf
.Capabilities
=
485 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
486 memcpy(vneg_inbuf
.Guid
, tcon
->ses
->server
->client_guid
,
487 SMB2_CLIENT_GUID_SIZE
);
490 vneg_inbuf
.SecurityMode
=
491 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
492 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
493 vneg_inbuf
.SecurityMode
=
494 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
496 vneg_inbuf
.SecurityMode
= 0;
498 vneg_inbuf
.DialectCount
= cpu_to_le16(1);
499 vneg_inbuf
.Dialects
[0] =
500 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
502 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
503 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
504 (char *)&vneg_inbuf
, sizeof(struct validate_negotiate_info_req
),
505 (char **)&pneg_rsp
, &rsplen
);
508 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
512 if (rsplen
!= sizeof(struct validate_negotiate_info_rsp
)) {
513 cifs_dbg(VFS
, "invalid size of protocol negotiate response\n");
517 /* check validate negotiate info response matches what we got earlier */
518 if (pneg_rsp
->Dialect
!=
519 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
))
522 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
525 /* do not validate server guid because not saved at negprot time yet */
527 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
528 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
531 /* validate negotiate successful */
532 cifs_dbg(FYI
, "validate negotiate info successful\n");
536 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
541 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
542 const struct nls_table
*nls_cp
)
544 struct smb2_sess_setup_req
*req
;
545 struct smb2_sess_setup_rsp
*rsp
= NULL
;
549 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
550 struct TCP_Server_Info
*server
= ses
->server
;
553 char *ntlmssp_blob
= NULL
;
554 bool use_spnego
= false; /* else use raw ntlmssp */
556 cifs_dbg(FYI
, "Session Setup\n");
559 WARN(1, "%s: server is NULL!\n", __func__
);
564 * If we are here due to reconnect, free per-smb session key
565 * in case signing was required.
567 kfree(ses
->auth_key
.response
);
568 ses
->auth_key
.response
= NULL
;
571 * If memory allocation is successful, caller of this function
574 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
577 ses
->ntlmssp
->sesskey_per_smbsess
= true;
579 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
580 ses
->sectype
= RawNTLMSSP
;
582 ssetup_ntlmssp_authenticate
:
583 if (phase
== NtLmChallenge
)
584 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
586 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
590 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
591 req
->VcNumber
= 0; /* MBZ */
592 /* to enable echos and oplocks */
593 req
->hdr
.CreditRequest
= cpu_to_le16(3);
595 /* only one of SMB2 signing flags may be set in SMB2 request */
597 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
598 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
599 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
601 req
->SecurityMode
= 0;
603 req
->Capabilities
= 0;
604 req
->Channel
= 0; /* MBZ */
606 iov
[0].iov_base
= (char *)req
;
607 /* 4 for rfc1002 length field and 1 for pad */
608 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
609 if (phase
== NtLmNegotiate
) {
610 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
612 if (ntlmssp_blob
== NULL
) {
616 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
618 /* blob_length = build_spnego_ntlmssp_blob(
620 sizeof(struct _NEGOTIATE_MESSAGE),
622 /* BB eventually need to add this */
623 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
628 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
629 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
630 security_blob
= ntlmssp_blob
;
632 } else if (phase
== NtLmAuthenticate
) {
633 req
->hdr
.SessionId
= ses
->Suid
;
634 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
636 if (ntlmssp_blob
== NULL
) {
640 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
643 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n",
645 goto ssetup_exit
; /* BB double check error handling */
648 /* blob_length = build_spnego_ntlmssp_blob(
652 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
657 security_blob
= ntlmssp_blob
;
660 cifs_dbg(VFS
, "illegal ntlmssp phase\n");
665 /* Testing shows that buffer offset must be at location of Buffer[0] */
666 req
->SecurityBufferOffset
=
667 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
668 1 /* pad */ - 4 /* rfc1001 len */);
669 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
670 iov
[1].iov_base
= security_blob
;
671 iov
[1].iov_len
= blob_length
;
673 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
675 /* BB add code to build os and lm fields */
677 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
,
678 CIFS_LOG_ERROR
| CIFS_NEG_OP
);
680 kfree(security_blob
);
681 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
682 if (resp_buftype
!= CIFS_NO_BUFFER
&&
683 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
684 if (phase
!= NtLmNegotiate
) {
685 cifs_dbg(VFS
, "Unexpected more processing error\n");
688 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
689 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
690 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
691 le16_to_cpu(rsp
->SecurityBufferOffset
));
696 /* NTLMSSP Negotiate sent now processing challenge (response) */
697 phase
= NtLmChallenge
; /* process ntlmssp challenge */
698 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
699 ses
->Suid
= rsp
->hdr
.SessionId
;
700 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
701 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
705 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
706 * but at least the raw NTLMSSP case works.
709 * No tcon so can't do
710 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
715 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
717 free_rsp_buf(resp_buftype
, rsp
);
719 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
720 if ((phase
== NtLmChallenge
) && (rc
== 0))
721 goto ssetup_ntlmssp_authenticate
;
724 mutex_lock(&server
->srv_mutex
);
725 if (server
->sign
&& server
->ops
->generate_signingkey
) {
726 rc
= server
->ops
->generate_signingkey(ses
);
727 kfree(ses
->auth_key
.response
);
728 ses
->auth_key
.response
= NULL
;
731 "SMB3 session key generation failed\n");
732 mutex_unlock(&server
->srv_mutex
);
736 if (!server
->session_estab
) {
737 server
->sequence_number
= 0x2;
738 server
->session_estab
= true;
740 mutex_unlock(&server
->srv_mutex
);
742 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
743 spin_lock(&GlobalMid_Lock
);
744 ses
->status
= CifsGood
;
745 ses
->need_reconnect
= false;
746 spin_unlock(&GlobalMid_Lock
);
751 kfree(ses
->auth_key
.response
);
752 ses
->auth_key
.response
= NULL
;
760 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
762 struct smb2_logoff_req
*req
; /* response is also trivial struct */
764 struct TCP_Server_Info
*server
;
766 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
768 if (ses
&& (ses
->server
))
769 server
= ses
->server
;
773 /* no need to send SMB logoff if uid already closed due to reconnect */
774 if (ses
->need_reconnect
)
775 goto smb2_session_already_dead
;
777 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
781 /* since no tcon, smb2_init can not do this, so do here */
782 req
->hdr
.SessionId
= ses
->Suid
;
784 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
786 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
788 * No tcon so can't do
789 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
792 smb2_session_already_dead
:
796 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
798 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
801 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
804 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
805 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
807 struct smb2_tree_connect_req
*req
;
808 struct smb2_tree_connect_rsp
*rsp
= NULL
;
813 struct TCP_Server_Info
*server
;
814 __le16
*unc_path
= NULL
;
816 cifs_dbg(FYI
, "TCON\n");
818 if ((ses
->server
) && tree
)
819 server
= ses
->server
;
823 if (tcon
&& tcon
->bad_network_name
)
826 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
827 if (unc_path
== NULL
)
830 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
832 if (unc_path_len
< 2) {
837 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
844 /* since no tcon, smb2_init can not do this, so do here */
845 req
->hdr
.SessionId
= ses
->Suid
;
846 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
847 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
850 iov
[0].iov_base
= (char *)req
;
851 /* 4 for rfc1002 length field and 1 for pad */
852 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
854 /* Testing shows that buffer offset must be at location of Buffer[0] */
855 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
856 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
857 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
858 iov
[1].iov_base
= unc_path
;
859 iov
[1].iov_len
= unc_path_len
;
861 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
863 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
864 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
868 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
869 tcon
->need_reconnect
= true;
871 goto tcon_error_exit
;
875 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
879 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
880 cifs_dbg(FYI
, "connection to disk share\n");
881 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
883 cifs_dbg(FYI
, "connection to pipe share\n");
884 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
886 cifs_dbg(FYI
, "connection to printer\n");
888 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
890 goto tcon_error_exit
;
893 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
894 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
895 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
896 tcon
->tidStatus
= CifsGood
;
897 tcon
->need_reconnect
= false;
898 tcon
->tid
= rsp
->hdr
.TreeId
;
899 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
901 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
902 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
903 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
905 if (tcon
->ses
->server
->ops
->validate_negotiate
)
906 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
908 free_rsp_buf(resp_buftype
, rsp
);
913 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
914 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
915 tcon
->bad_network_name
= true;
921 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
923 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
925 struct TCP_Server_Info
*server
;
926 struct cifs_ses
*ses
= tcon
->ses
;
928 cifs_dbg(FYI
, "Tree Disconnect\n");
930 if (ses
&& (ses
->server
))
931 server
= ses
->server
;
935 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
938 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
942 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
944 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
950 static struct create_durable
*
951 create_durable_buf(void)
953 struct create_durable
*buf
;
955 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
959 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
960 (struct create_durable
, Data
));
961 buf
->ccontext
.DataLength
= cpu_to_le32(16);
962 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
963 (struct create_durable
, Name
));
964 buf
->ccontext
.NameLength
= cpu_to_le16(4);
972 static struct create_durable
*
973 create_reconnect_durable_buf(struct cifs_fid
*fid
)
975 struct create_durable
*buf
;
977 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
981 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
982 (struct create_durable
, Data
));
983 buf
->ccontext
.DataLength
= cpu_to_le32(16);
984 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
985 (struct create_durable
, Name
));
986 buf
->ccontext
.NameLength
= cpu_to_le16(4);
987 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
988 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
997 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1001 struct create_context
*cc
;
1002 unsigned int next
= 0;
1005 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
1006 cc
= (struct create_context
*)data_offset
;
1008 cc
= (struct create_context
*)((char *)cc
+ next
);
1009 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1010 if (le16_to_cpu(cc
->NameLength
) != 4 ||
1011 strncmp(name
, "RqLs", 4)) {
1012 next
= le32_to_cpu(cc
->Next
);
1015 return server
->ops
->parse_lease_buf(cc
, epoch
);
1016 } while (next
!= 0);
1022 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1023 unsigned int *num_iovec
, __u8
*oplock
)
1025 struct smb2_create_req
*req
= iov
[0].iov_base
;
1026 unsigned int num
= *num_iovec
;
1028 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1029 if (iov
[num
].iov_base
== NULL
)
1031 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1032 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1033 if (!req
->CreateContextsOffset
)
1034 req
->CreateContextsOffset
= cpu_to_le32(
1035 sizeof(struct smb2_create_req
) - 4 +
1036 iov
[num
- 1].iov_len
);
1037 le32_add_cpu(&req
->CreateContextsLength
,
1038 server
->vals
->create_lease_size
);
1039 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
1040 *num_iovec
= num
+ 1;
1045 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1046 struct cifs_open_parms
*oparms
)
1048 struct smb2_create_req
*req
= iov
[0].iov_base
;
1049 unsigned int num
= *num_iovec
;
1051 if (oparms
->reconnect
) {
1052 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1053 /* indicate that we don't need to relock the file */
1054 oparms
->reconnect
= false;
1056 iov
[num
].iov_base
= create_durable_buf();
1057 if (iov
[num
].iov_base
== NULL
)
1059 iov
[num
].iov_len
= sizeof(struct create_durable
);
1060 if (!req
->CreateContextsOffset
)
1061 req
->CreateContextsOffset
=
1062 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1064 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1065 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
1066 *num_iovec
= num
+ 1;
1071 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1072 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1073 struct smb2_err_rsp
**err_buf
)
1075 struct smb2_create_req
*req
;
1076 struct smb2_create_rsp
*rsp
;
1077 struct TCP_Server_Info
*server
;
1078 struct cifs_tcon
*tcon
= oparms
->tcon
;
1079 struct cifs_ses
*ses
= tcon
->ses
;
1083 __le16
*copy_path
= NULL
;
1086 unsigned int num_iovecs
= 2;
1087 __u32 file_attributes
= 0;
1088 char *dhc_buf
= NULL
, *lc_buf
= NULL
;
1090 cifs_dbg(FYI
, "create/open\n");
1092 if (ses
&& (ses
->server
))
1093 server
= ses
->server
;
1097 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1101 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1102 file_attributes
|= ATTR_READONLY
;
1104 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1105 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1106 /* File attributes ignored on open (used in create though) */
1107 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1108 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1109 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1110 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1111 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1112 /* do not count rfc1001 len field */
1113 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
1115 iov
[0].iov_base
= (char *)req
;
1116 /* 4 for rfc1002 length field */
1117 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1119 /* MUST set path len (NameLength) to 0 opening root of share */
1120 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1121 /* -1 since last byte is buf[0] which is sent below (path) */
1123 if (uni_path_len
% 8 != 0) {
1124 copy_size
= uni_path_len
/ 8 * 8;
1125 if (copy_size
< uni_path_len
)
1128 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1131 memcpy((char *)copy_path
, (const char *)path
,
1133 uni_path_len
= copy_size
;
1137 iov
[1].iov_len
= uni_path_len
;
1138 iov
[1].iov_base
= path
;
1139 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1140 inc_rfc1001_len(req
, uni_path_len
- 1);
1142 if (!server
->oplocks
)
1143 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1145 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1146 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1147 req
->RequestedOplockLevel
= *oplock
;
1149 rc
= add_lease_context(server
, iov
, &num_iovecs
, oplock
);
1151 cifs_small_buf_release(req
);
1155 lc_buf
= iov
[num_iovecs
-1].iov_base
;
1158 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1159 /* need to set Next field of lease context if we request it */
1160 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
1161 struct create_context
*ccontext
=
1162 (struct create_context
*)iov
[num_iovecs
-1].iov_base
;
1164 cpu_to_le32(server
->vals
->create_lease_size
);
1166 rc
= add_durable_context(iov
, &num_iovecs
, oparms
);
1168 cifs_small_buf_release(req
);
1173 dhc_buf
= iov
[num_iovecs
-1].iov_base
;
1176 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1177 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
1180 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1182 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1187 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1188 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1191 memcpy(buf
, &rsp
->CreationTime
, 32);
1192 buf
->AllocationSize
= rsp
->AllocationSize
;
1193 buf
->EndOfFile
= rsp
->EndofFile
;
1194 buf
->Attributes
= rsp
->FileAttributes
;
1195 buf
->NumberOfLinks
= cpu_to_le32(1);
1196 buf
->DeletePending
= 0;
1199 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1200 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1202 *oplock
= rsp
->OplockLevel
;
1207 free_rsp_buf(resp_buftype
, rsp
);
1212 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1215 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1216 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, char *in_data
,
1217 u32 indatalen
, char **out_data
, u32
*plen
/* returned data len */)
1219 struct smb2_ioctl_req
*req
;
1220 struct smb2_ioctl_rsp
*rsp
;
1221 struct TCP_Server_Info
*server
;
1222 struct cifs_ses
*ses
= tcon
->ses
;
1228 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1230 /* zero out returned data len, in case of error */
1234 if (ses
&& (ses
->server
))
1235 server
= ses
->server
;
1239 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1243 req
->CtlCode
= cpu_to_le32(opcode
);
1244 req
->PersistentFileId
= persistent_fid
;
1245 req
->VolatileFileId
= volatile_fid
;
1248 req
->InputCount
= cpu_to_le32(indatalen
);
1249 /* do not set InputOffset if no input data */
1251 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1252 iov
[1].iov_base
= in_data
;
1253 iov
[1].iov_len
= indatalen
;
1258 req
->OutputOffset
= 0;
1259 req
->OutputCount
= 0; /* MBZ */
1262 * Could increase MaxOutputResponse, but that would require more
1263 * than one credit. Windows typically sets this smaller, but for some
1264 * ioctls it may be useful to allow server to send more. No point
1265 * limiting what the server can send as long as fits in one credit
1267 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1270 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1274 iov
[0].iov_base
= (char *)req
;
1275 /* 4 for rfc1002 length field */
1276 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1279 inc_rfc1001_len(req
, indatalen
);
1281 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1282 rsp
= (struct smb2_ioctl_rsp
*)iov
[0].iov_base
;
1286 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1290 /* check if caller wants to look at return data or just return rc */
1291 if ((plen
== NULL
) || (out_data
== NULL
))
1294 *plen
= le32_to_cpu(rsp
->OutputCount
);
1296 /* We check for obvious errors in the output buffer length and offset */
1298 goto ioctl_exit
; /* server returned no data */
1299 else if (*plen
> 0xFF00) {
1300 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1306 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1307 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1308 le32_to_cpu(rsp
->OutputOffset
));
1314 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1315 if (*out_data
== NULL
) {
1320 memcpy(*out_data
, rsp
->hdr
.ProtocolId
+ le32_to_cpu(rsp
->OutputOffset
),
1323 free_rsp_buf(resp_buftype
, rsp
);
1328 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1329 u64 persistent_fid
, u64 volatile_fid
)
1331 struct smb2_close_req
*req
;
1332 struct smb2_close_rsp
*rsp
;
1333 struct TCP_Server_Info
*server
;
1334 struct cifs_ses
*ses
= tcon
->ses
;
1339 cifs_dbg(FYI
, "Close\n");
1341 if (ses
&& (ses
->server
))
1342 server
= ses
->server
;
1346 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1350 req
->PersistentFileId
= persistent_fid
;
1351 req
->VolatileFileId
= volatile_fid
;
1353 iov
[0].iov_base
= (char *)req
;
1354 /* 4 for rfc1002 length field */
1355 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1357 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1358 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1362 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1366 /* BB FIXME - decode close response, update inode for caching */
1369 free_rsp_buf(resp_buftype
, rsp
);
1374 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1375 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1378 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1379 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1380 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1381 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1384 if (buffer_length
< min_buf_size
) {
1385 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1386 buffer_length
, min_buf_size
);
1390 /* check if beyond RFC1001 maximum length */
1391 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1392 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1393 buffer_length
, smb_len
);
1397 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1398 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1406 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1407 * Caller must free buffer.
1410 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1411 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1415 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1421 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1425 memcpy(data
, begin_of_buf
, buffer_length
);
1431 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1432 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1433 size_t output_len
, size_t min_len
, void *data
)
1435 struct smb2_query_info_req
*req
;
1436 struct smb2_query_info_rsp
*rsp
= NULL
;
1440 struct TCP_Server_Info
*server
;
1441 struct cifs_ses
*ses
= tcon
->ses
;
1443 cifs_dbg(FYI
, "Query Info\n");
1445 if (ses
&& (ses
->server
))
1446 server
= ses
->server
;
1450 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1454 req
->InfoType
= SMB2_O_INFO_FILE
;
1455 req
->FileInfoClass
= info_class
;
1456 req
->PersistentFileId
= persistent_fid
;
1457 req
->VolatileFileId
= volatile_fid
;
1458 /* 4 for rfc1002 length field and 1 for Buffer */
1459 req
->InputBufferOffset
=
1460 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1461 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1463 iov
[0].iov_base
= (char *)req
;
1464 /* 4 for rfc1002 length field */
1465 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1467 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1468 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1471 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1475 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1476 le32_to_cpu(rsp
->OutputBufferLength
),
1477 &rsp
->hdr
, min_len
, data
);
1480 free_rsp_buf(resp_buftype
, rsp
);
1485 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1486 u64 persistent_fid
, u64 volatile_fid
,
1487 struct smb2_file_all_info
*data
)
1489 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1490 FILE_ALL_INFORMATION
,
1491 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1492 sizeof(struct smb2_file_all_info
), data
);
1496 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1497 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1499 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1500 FILE_INTERNAL_INFORMATION
,
1501 sizeof(struct smb2_file_internal_info
),
1502 sizeof(struct smb2_file_internal_info
), uniqueid
);
1506 * This is a no-op for now. We're not really interested in the reply, but
1507 * rather in the fact that the server sent one and that server->lstrp
1510 * FIXME: maybe we should consider checking that the reply matches request?
1513 smb2_echo_callback(struct mid_q_entry
*mid
)
1515 struct TCP_Server_Info
*server
= mid
->callback_data
;
1516 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1517 unsigned int credits_received
= 1;
1519 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1520 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1522 DeleteMidQEntry(mid
);
1523 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1527 SMB2_echo(struct TCP_Server_Info
*server
)
1529 struct smb2_echo_req
*req
;
1532 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1535 cifs_dbg(FYI
, "In echo request\n");
1537 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1541 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1543 iov
.iov_base
= (char *)req
;
1544 /* 4 for rfc1002 length field */
1545 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1547 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1550 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
1552 cifs_small_buf_release(req
);
1557 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1560 struct smb2_flush_req
*req
;
1561 struct TCP_Server_Info
*server
;
1562 struct cifs_ses
*ses
= tcon
->ses
;
1567 cifs_dbg(FYI
, "Flush\n");
1569 if (ses
&& (ses
->server
))
1570 server
= ses
->server
;
1574 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1578 req
->PersistentFileId
= persistent_fid
;
1579 req
->VolatileFileId
= volatile_fid
;
1581 iov
[0].iov_base
= (char *)req
;
1582 /* 4 for rfc1002 length field */
1583 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1585 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1587 if ((rc
!= 0) && tcon
)
1588 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1590 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1595 * To form a chain of read requests, any read requests after the first should
1596 * have the end_of_chain boolean set to true.
1599 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1600 unsigned int remaining_bytes
, int request_type
)
1603 struct smb2_read_req
*req
= NULL
;
1605 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1608 if (io_parms
->tcon
->ses
->server
== NULL
)
1609 return -ECONNABORTED
;
1611 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1613 req
->PersistentFileId
= io_parms
->persistent_fid
;
1614 req
->VolatileFileId
= io_parms
->volatile_fid
;
1615 req
->ReadChannelInfoOffset
= 0; /* reserved */
1616 req
->ReadChannelInfoLength
= 0; /* reserved */
1617 req
->Channel
= 0; /* reserved */
1618 req
->MinimumCount
= 0;
1619 req
->Length
= cpu_to_le32(io_parms
->length
);
1620 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1622 if (request_type
& CHAINED_REQUEST
) {
1623 if (!(request_type
& END_OF_CHAIN
)) {
1624 /* 4 for rfc1002 length field */
1625 req
->hdr
.NextCommand
=
1626 cpu_to_le32(get_rfc1002_length(req
) + 4);
1627 } else /* END_OF_CHAIN */
1628 req
->hdr
.NextCommand
= 0;
1629 if (request_type
& RELATED_REQUEST
) {
1630 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1632 * Related requests use info from previous read request
1635 req
->hdr
.SessionId
= 0xFFFFFFFF;
1636 req
->hdr
.TreeId
= 0xFFFFFFFF;
1637 req
->PersistentFileId
= 0xFFFFFFFF;
1638 req
->VolatileFileId
= 0xFFFFFFFF;
1641 if (remaining_bytes
> io_parms
->length
)
1642 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1644 req
->RemainingBytes
= 0;
1646 iov
[0].iov_base
= (char *)req
;
1647 /* 4 for rfc1002 length field */
1648 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1653 smb2_readv_callback(struct mid_q_entry
*mid
)
1655 struct cifs_readdata
*rdata
= mid
->callback_data
;
1656 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1657 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1658 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1659 unsigned int credits_received
= 1;
1660 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1662 .rq_pages
= rdata
->pages
,
1663 .rq_npages
= rdata
->nr_pages
,
1664 .rq_pagesz
= rdata
->pagesz
,
1665 .rq_tailsz
= rdata
->tailsz
};
1667 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1668 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
1671 switch (mid
->mid_state
) {
1672 case MID_RESPONSE_RECEIVED
:
1673 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1674 /* result already set, check signature */
1678 rc
= smb2_verify_signature(&rqst
, server
);
1680 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
1683 /* FIXME: should this be counted toward the initiating task? */
1684 task_io_account_read(rdata
->bytes
);
1685 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1687 case MID_REQUEST_SUBMITTED
:
1688 case MID_RETRY_NEEDED
:
1689 rdata
->result
= -EAGAIN
;
1692 if (rdata
->result
!= -ENODATA
)
1693 rdata
->result
= -EIO
;
1697 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1699 queue_work(cifsiod_wq
, &rdata
->work
);
1700 DeleteMidQEntry(mid
);
1701 add_credits(server
, credits_received
, 0);
1704 /* smb2_async_readv - send an async write, and set up mid to handle result */
1706 smb2_async_readv(struct cifs_readdata
*rdata
)
1709 struct smb2_hdr
*buf
;
1710 struct cifs_io_parms io_parms
;
1711 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1714 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
1715 __func__
, rdata
->offset
, rdata
->bytes
);
1717 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1718 io_parms
.offset
= rdata
->offset
;
1719 io_parms
.length
= rdata
->bytes
;
1720 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1721 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1722 io_parms
.pid
= rdata
->pid
;
1723 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1727 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1728 /* 4 for rfc1002 length field */
1729 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1731 kref_get(&rdata
->refcount
);
1732 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1733 cifs_readv_receive
, smb2_readv_callback
,
1736 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1737 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1740 cifs_small_buf_release(buf
);
1745 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1746 unsigned int *nbytes
, char **buf
, int *buf_type
)
1748 int resp_buftype
, rc
= -EACCES
;
1749 struct smb2_read_rsp
*rsp
= NULL
;
1753 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1757 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1758 &resp_buftype
, CIFS_LOG_ERROR
);
1760 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1762 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1763 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1768 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1769 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
1771 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1772 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1773 (*nbytes
> io_parms
->length
)) {
1774 cifs_dbg(FYI
, "bad length %d for count %d\n",
1775 *nbytes
, io_parms
->length
);
1782 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1784 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1785 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1786 *buf
= iov
[0].iov_base
;
1787 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1788 *buf_type
= CIFS_SMALL_BUFFER
;
1789 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1790 *buf_type
= CIFS_LARGE_BUFFER
;
1796 * Check the mid_state and signature on received buffer (if any), and queue the
1797 * workqueue completion task.
1800 smb2_writev_callback(struct mid_q_entry
*mid
)
1802 struct cifs_writedata
*wdata
= mid
->callback_data
;
1803 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1804 unsigned int written
;
1805 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1806 unsigned int credits_received
= 1;
1808 switch (mid
->mid_state
) {
1809 case MID_RESPONSE_RECEIVED
:
1810 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1811 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1812 if (wdata
->result
!= 0)
1815 written
= le32_to_cpu(rsp
->DataLength
);
1817 * Mask off high 16 bits when bytes written as returned
1818 * by the server is greater than bytes requested by the
1819 * client. OS/2 servers are known to set incorrect
1822 if (written
> wdata
->bytes
)
1825 if (written
< wdata
->bytes
)
1826 wdata
->result
= -ENOSPC
;
1828 wdata
->bytes
= written
;
1830 case MID_REQUEST_SUBMITTED
:
1831 case MID_RETRY_NEEDED
:
1832 wdata
->result
= -EAGAIN
;
1835 wdata
->result
= -EIO
;
1840 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1842 queue_work(cifsiod_wq
, &wdata
->work
);
1843 DeleteMidQEntry(mid
);
1844 add_credits(tcon
->ses
->server
, credits_received
, 0);
1847 /* smb2_async_writev - send an async write, and set up mid to handle result */
1849 smb2_async_writev(struct cifs_writedata
*wdata
)
1852 struct smb2_write_req
*req
= NULL
;
1853 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1855 struct smb_rqst rqst
;
1857 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1859 goto async_writev_out
;
1861 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1863 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1864 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1865 req
->WriteChannelInfoOffset
= 0;
1866 req
->WriteChannelInfoLength
= 0;
1868 req
->Offset
= cpu_to_le64(wdata
->offset
);
1869 /* 4 for rfc1002 length field */
1870 req
->DataOffset
= cpu_to_le16(
1871 offsetof(struct smb2_write_req
, Buffer
) - 4);
1872 req
->RemainingBytes
= 0;
1874 /* 4 for rfc1002 length field and 1 for Buffer */
1875 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1880 rqst
.rq_pages
= wdata
->pages
;
1881 rqst
.rq_npages
= wdata
->nr_pages
;
1882 rqst
.rq_pagesz
= wdata
->pagesz
;
1883 rqst
.rq_tailsz
= wdata
->tailsz
;
1885 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
1886 wdata
->offset
, wdata
->bytes
);
1888 req
->Length
= cpu_to_le32(wdata
->bytes
);
1890 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1892 kref_get(&wdata
->refcount
);
1893 rc
= cifs_call_async(tcon
->ses
->server
, &rqst
, NULL
,
1894 smb2_writev_callback
, wdata
, 0);
1897 kref_put(&wdata
->refcount
, cifs_writedata_release
);
1898 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1902 cifs_small_buf_release(req
);
1907 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1908 * The length field from io_parms must be at least 1 and indicates a number of
1909 * elements with data to write that begins with position 1 in iov array. All
1910 * data length is specified by count.
1913 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1914 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1917 struct smb2_write_req
*req
= NULL
;
1918 struct smb2_write_rsp
*rsp
= NULL
;
1925 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1929 if (io_parms
->tcon
->ses
->server
== NULL
)
1930 return -ECONNABORTED
;
1932 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1934 req
->PersistentFileId
= io_parms
->persistent_fid
;
1935 req
->VolatileFileId
= io_parms
->volatile_fid
;
1936 req
->WriteChannelInfoOffset
= 0;
1937 req
->WriteChannelInfoLength
= 0;
1939 req
->Length
= cpu_to_le32(io_parms
->length
);
1940 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1941 /* 4 for rfc1002 length field */
1942 req
->DataOffset
= cpu_to_le16(
1943 offsetof(struct smb2_write_req
, Buffer
) - 4);
1944 req
->RemainingBytes
= 0;
1946 iov
[0].iov_base
= (char *)req
;
1947 /* 4 for rfc1002 length field and 1 for Buffer */
1948 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1950 /* length of entire message including data to be written */
1951 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1953 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
1955 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
1958 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
1959 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
1961 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1963 free_rsp_buf(resp_buftype
, rsp
);
1968 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
1971 unsigned int entrycount
= 0;
1972 unsigned int next_offset
= 0;
1973 FILE_DIRECTORY_INFO
*entryptr
;
1975 if (bufstart
== NULL
)
1978 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
1981 entryptr
= (FILE_DIRECTORY_INFO
*)
1982 ((char *)entryptr
+ next_offset
);
1984 if ((char *)entryptr
+ size
> end_of_buf
) {
1985 cifs_dbg(VFS
, "malformed search entry would overflow\n");
1989 len
= le32_to_cpu(entryptr
->FileNameLength
);
1990 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
1991 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
1996 *lastentry
= (char *)entryptr
;
1999 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
2011 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
2012 u64 persistent_fid
, u64 volatile_fid
, int index
,
2013 struct cifs_search_info
*srch_inf
)
2015 struct smb2_query_directory_req
*req
;
2016 struct smb2_query_directory_rsp
*rsp
= NULL
;
2021 unsigned char *bufptr
;
2022 struct TCP_Server_Info
*server
;
2023 struct cifs_ses
*ses
= tcon
->ses
;
2024 __le16 asteriks
= cpu_to_le16('*');
2026 unsigned int output_size
= CIFSMaxBufSize
;
2027 size_t info_buf_size
;
2029 if (ses
&& (ses
->server
))
2030 server
= ses
->server
;
2034 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
2038 switch (srch_inf
->info_level
) {
2039 case SMB_FIND_FILE_DIRECTORY_INFO
:
2040 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
2041 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
2043 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
2044 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
2045 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
2048 cifs_dbg(VFS
, "info level %u isn't supported\n",
2049 srch_inf
->info_level
);
2054 req
->FileIndex
= cpu_to_le32(index
);
2055 req
->PersistentFileId
= persistent_fid
;
2056 req
->VolatileFileId
= volatile_fid
;
2059 bufptr
= req
->Buffer
;
2060 memcpy(bufptr
, &asteriks
, len
);
2062 req
->FileNameOffset
=
2063 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
2064 req
->FileNameLength
= cpu_to_le16(len
);
2066 * BB could be 30 bytes or so longer if we used SMB2 specific
2067 * buffer lengths, but this is safe and close enough.
2069 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
2070 output_size
= min_t(unsigned int, output_size
, 2 << 15);
2071 req
->OutputBufferLength
= cpu_to_le32(output_size
);
2073 iov
[0].iov_base
= (char *)req
;
2074 /* 4 for RFC1001 length and 1 for Buffer */
2075 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2077 iov
[1].iov_base
= (char *)(req
->Buffer
);
2078 iov
[1].iov_len
= len
;
2080 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
2082 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
2083 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
2086 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
2090 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2091 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2096 srch_inf
->unicode
= true;
2098 if (srch_inf
->ntwrk_buf_start
) {
2099 if (srch_inf
->smallBuf
)
2100 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
2102 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
2104 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
2105 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
2106 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
2107 /* 4 for rfc1002 length field */
2108 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
2109 srch_inf
->entries_in_buffer
=
2110 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
2111 &srch_inf
->last_entry
, info_buf_size
);
2112 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
2113 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
2114 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
2115 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
2116 if (resp_buftype
== CIFS_LARGE_BUFFER
)
2117 srch_inf
->smallBuf
= false;
2118 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
2119 srch_inf
->smallBuf
= true;
2121 cifs_dbg(VFS
, "illegal search buffer type\n");
2123 if (rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
)
2124 srch_inf
->endOfSearch
= 1;
2126 srch_inf
->endOfSearch
= 0;
2131 free_rsp_buf(resp_buftype
, rsp
);
2136 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2137 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
2138 unsigned int num
, void **data
, unsigned int *size
)
2140 struct smb2_set_info_req
*req
;
2141 struct smb2_set_info_rsp
*rsp
= NULL
;
2146 struct TCP_Server_Info
*server
;
2147 struct cifs_ses
*ses
= tcon
->ses
;
2149 if (ses
&& (ses
->server
))
2150 server
= ses
->server
;
2157 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
2161 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
2167 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2169 req
->InfoType
= SMB2_O_INFO_FILE
;
2170 req
->FileInfoClass
= info_class
;
2171 req
->PersistentFileId
= persistent_fid
;
2172 req
->VolatileFileId
= volatile_fid
;
2174 /* 4 for RFC1001 length and 1 for Buffer */
2176 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
2177 req
->BufferLength
= cpu_to_le32(*size
);
2179 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
2181 memcpy(req
->Buffer
, *data
, *size
);
2183 iov
[0].iov_base
= (char *)req
;
2184 /* 4 for RFC1001 length */
2185 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2187 for (i
= 1; i
< num
; i
++) {
2188 inc_rfc1001_len(req
, size
[i
]);
2189 le32_add_cpu(&req
->BufferLength
, size
[i
]);
2190 iov
[i
].iov_base
= (char *)data
[i
];
2191 iov
[i
].iov_len
= size
[i
];
2194 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
2195 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
2198 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
2202 free_rsp_buf(resp_buftype
, rsp
);
2208 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
2209 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2211 struct smb2_file_rename_info info
;
2213 unsigned int size
[2];
2215 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2217 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2221 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
2222 /* 0 = fail if target already exists */
2223 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2224 info
.FileNameLength
= cpu_to_le32(len
);
2227 size
[0] = sizeof(struct smb2_file_rename_info
);
2229 data
[1] = target_file
;
2230 size
[1] = len
+ 2 /* null */;
2232 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2233 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2240 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2241 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2243 struct smb2_file_link_info info
;
2245 unsigned int size
[2];
2247 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2249 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2253 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2254 /* 0 = fail if link already exists */
2255 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2256 info
.FileNameLength
= cpu_to_le32(len
);
2259 size
[0] = sizeof(struct smb2_file_link_info
);
2261 data
[1] = target_file
;
2262 size
[1] = len
+ 2 /* null */;
2264 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2265 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2271 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2272 u64 volatile_fid
, u32 pid
, __le64
*eof
)
2274 struct smb2_file_eof_info info
;
2278 info
.EndOfFile
= *eof
;
2281 size
= sizeof(struct smb2_file_eof_info
);
2283 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
2284 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2288 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2289 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2292 size
= sizeof(FILE_BASIC_INFO
);
2293 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2294 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2295 (void **)&buf
, &size
);
2299 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2300 const u64 persistent_fid
, const u64 volatile_fid
,
2304 struct smb2_oplock_break
*req
= NULL
;
2306 cifs_dbg(FYI
, "SMB2_oplock_break\n");
2307 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2312 req
->VolatileFid
= volatile_fid
;
2313 req
->PersistentFid
= persistent_fid
;
2314 req
->OplockLevel
= oplock_level
;
2315 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2317 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2318 /* SMB2 buffer freed by function above */
2321 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2322 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
2329 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2330 struct kstatfs
*kst
)
2332 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2333 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2334 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2335 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2336 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2341 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2342 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2345 struct smb2_query_info_req
*req
;
2347 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2349 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2352 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2356 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2357 req
->FileInfoClass
= level
;
2358 req
->PersistentFileId
= persistent_fid
;
2359 req
->VolatileFileId
= volatile_fid
;
2360 /* 4 for rfc1002 length field and 1 for pad */
2361 req
->InputBufferOffset
=
2362 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2363 req
->OutputBufferLength
= cpu_to_le32(
2364 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2366 iov
->iov_base
= (char *)req
;
2367 /* 4 for rfc1002 length field */
2368 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2373 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2374 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2376 struct smb2_query_info_rsp
*rsp
= NULL
;
2380 struct cifs_ses
*ses
= tcon
->ses
;
2381 struct smb2_fs_full_size_info
*info
= NULL
;
2383 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2384 sizeof(struct smb2_fs_full_size_info
),
2385 persistent_fid
, volatile_fid
);
2389 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2391 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2394 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2396 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2397 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2398 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2399 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2400 sizeof(struct smb2_fs_full_size_info
));
2402 copy_fs_info_to_kstatfs(info
, fsdata
);
2405 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2410 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2411 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2412 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2415 struct smb2_lock_req
*req
= NULL
;
2420 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2422 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2426 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2427 req
->LockCount
= cpu_to_le16(num_lock
);
2429 req
->PersistentFileId
= persist_fid
;
2430 req
->VolatileFileId
= volatile_fid
;
2432 count
= num_lock
* sizeof(struct smb2_lock_element
);
2433 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2435 iov
[0].iov_base
= (char *)req
;
2436 /* 4 for rfc1002 length field and count for all locks */
2437 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2438 iov
[1].iov_base
= (char *)buf
;
2439 iov
[1].iov_len
= count
;
2441 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2442 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2444 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2445 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2452 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2453 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2454 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2457 struct smb2_lock_element lock
;
2459 lock
.Offset
= cpu_to_le64(offset
);
2460 lock
.Length
= cpu_to_le64(length
);
2461 lock
.Flags
= cpu_to_le32(lock_flags
);
2462 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2463 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2465 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2469 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2470 __u8
*lease_key
, const __le32 lease_state
)
2473 struct smb2_lease_ack
*req
= NULL
;
2475 cifs_dbg(FYI
, "SMB2_lease_break\n");
2476 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2481 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2482 req
->StructureSize
= cpu_to_le16(36);
2483 inc_rfc1001_len(req
, 12);
2485 memcpy(req
->LeaseKey
, lease_key
, 16);
2486 req
->LeaseState
= lease_state
;
2488 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2489 /* SMB2 buffer freed by function above */
2492 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2493 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);