4 * Copyright (C) International Business Machines Corp., 2009, 2012
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
9 * Contains the routines for constructing the SMB2 PDUs themselves
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
32 #include <linux/kernel.h>
33 #include <linux/vfs.h>
34 #include <linux/task_io_accounting_ops.h>
35 #include <linux/uaccess.h>
36 #include <linux/pagemap.h>
37 #include <linux/xattr.h>
41 #include "cifsproto.h"
42 #include "smb2proto.h"
43 #include "cifs_unicode.h"
44 #include "cifs_debug.h"
46 #include "smb2status.h"
51 * The following table defines the expected "StructureSize" of SMB2 requests
52 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
54 * Note that commands are defined in smb2pdu.h in le16 but the array below is
55 * indexed by command in host byte order.
57 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
58 /* SMB2_NEGOTIATE */ 36,
59 /* SMB2_SESSION_SETUP */ 25,
61 /* SMB2_TREE_CONNECT */ 9,
62 /* SMB2_TREE_DISCONNECT */ 4,
72 /* SMB2_QUERY_DIRECTORY */ 33,
73 /* SMB2_CHANGE_NOTIFY */ 32,
74 /* SMB2_QUERY_INFO */ 41,
75 /* SMB2_SET_INFO */ 33,
76 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
81 smb2_hdr_assemble(struct smb2_hdr
*hdr
, __le16 smb2_cmd
/* command */ ,
82 const struct cifs_tcon
*tcon
)
84 struct smb2_pdu
*pdu
= (struct smb2_pdu
*)hdr
;
85 char *temp
= (char *)hdr
;
86 /* lookup word count ie StructureSize from table */
87 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_cmd
)];
90 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
91 * largest operations (Create)
95 /* Note this is only network field converted to big endian */
96 hdr
->smb2_buf_length
= cpu_to_be32(parmsize
+ sizeof(struct smb2_hdr
)
97 - 4 /* RFC 1001 length field itself not counted */);
99 hdr
->ProtocolId
[0] = 0xFE;
100 hdr
->ProtocolId
[1] = 'S';
101 hdr
->ProtocolId
[2] = 'M';
102 hdr
->ProtocolId
[3] = 'B';
103 hdr
->StructureSize
= cpu_to_le16(64);
104 hdr
->Command
= smb2_cmd
;
105 hdr
->CreditRequest
= cpu_to_le16(2); /* BB make this dynamic */
106 hdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
111 hdr
->TreeId
= tcon
->tid
;
112 /* Uid is not converted */
114 hdr
->SessionId
= tcon
->ses
->Suid
;
115 /* BB check following DFS flags BB */
116 /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */
117 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
)
118 hdr
->Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
119 /* BB how does SMB2 do case sensitive? */
121 hdr->Flags |= SMBFLG_CASELESS; */
122 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
)
123 hdr
->Flags
|= SMB2_FLAGS_SIGNED
;
125 pdu
->StructureSize2
= cpu_to_le16(parmsize
);
130 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
133 struct nls_table
*nls_codepage
;
134 struct cifs_ses
*ses
;
135 struct TCP_Server_Info
*server
;
138 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
139 * check for tcp and smb session status done differently
140 * for those three - in the calling routine.
145 if (smb2_command
== SMB2_TREE_CONNECT
)
148 if (tcon
->tidStatus
== CifsExiting
) {
150 * only tree disconnect, open, and write,
151 * (and ulogoff which does not have tcon)
152 * are allowed as we start force umount.
154 if ((smb2_command
!= SMB2_WRITE
) &&
155 (smb2_command
!= SMB2_CREATE
) &&
156 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
157 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
162 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
163 (!tcon
->ses
->server
))
167 server
= ses
->server
;
170 * Give demultiplex thread up to 10 seconds to reconnect, should be
171 * greater than cifs socket timeout which is 7 seconds
173 while (server
->tcpStatus
== CifsNeedReconnect
) {
175 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
176 * here since they are implicitly done when session drops.
178 switch (smb2_command
) {
180 * BB Should we keep oplock break and add flush to exceptions?
182 case SMB2_TREE_DISCONNECT
:
185 case SMB2_OPLOCK_BREAK
:
189 wait_event_interruptible_timeout(server
->response_q
,
190 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
192 /* are we still trying to reconnect? */
193 if (server
->tcpStatus
!= CifsNeedReconnect
)
197 * on "soft" mounts we wait once. Hard mounts keep
198 * retrying until process is killed or server comes
202 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
207 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
210 nls_codepage
= load_nls_default();
213 * need to prevent multiple threads trying to simultaneously reconnect
214 * the same SMB session
216 mutex_lock(&tcon
->ses
->session_mutex
);
217 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
218 if (!rc
&& tcon
->ses
->need_reconnect
)
219 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
221 if (rc
|| !tcon
->need_reconnect
) {
222 mutex_unlock(&tcon
->ses
->session_mutex
);
226 cifs_mark_open_files_invalid(tcon
);
227 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
228 mutex_unlock(&tcon
->ses
->session_mutex
);
229 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
232 atomic_inc(&tconInfoReconnectCount
);
234 * BB FIXME add code to check if wsize needs update due to negotiated
235 * smb buffer size shrinking.
239 * Check if handle based operation so we know whether we can continue
240 * or not without returning to caller to reset file handle.
243 * BB Is flush done by server on drop of tcp session? Should we special
244 * case it and skip above?
246 switch (smb2_command
) {
252 case SMB2_QUERY_DIRECTORY
:
253 case SMB2_CHANGE_NOTIFY
:
254 case SMB2_QUERY_INFO
:
258 unload_nls(nls_codepage
);
263 * Allocate and return pointer to an SMB request hdr, and set basic
264 * SMB information in the SMB header. If the return code is zero, this
265 * function must have filled in request_buf pointer.
268 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
273 rc
= smb2_reconnect(smb2_command
, tcon
);
277 /* BB eventually switch this to SMB2 specific small buf size */
278 *request_buf
= cifs_small_buf_get();
279 if (*request_buf
== NULL
) {
280 /* BB should we add a retry in here if not a writepage? */
284 smb2_hdr_assemble((struct smb2_hdr
*) *request_buf
, smb2_command
, tcon
);
287 #ifdef CONFIG_CIFS_STATS2
288 uint16_t com_code
= le16_to_cpu(smb2_command
);
289 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
291 cifs_stats_inc(&tcon
->num_smbs_sent
);
298 free_rsp_buf(int resp_buftype
, void *rsp
)
300 if (resp_buftype
== CIFS_SMALL_BUFFER
)
301 cifs_small_buf_release(rsp
);
302 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
303 cifs_buf_release(rsp
);
309 * SMB2 Worker functions follow:
311 * The general structure of the worker functions is:
312 * 1) Call smb2_init (assembles SMB2 header)
313 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
314 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
315 * 4) Decode SMB2 command specific fields in the fixed length area
316 * 5) Decode variable length data area (if any for this SMB2 command type)
317 * 6) Call free smb buffer
323 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
325 struct smb2_negotiate_req
*req
;
326 struct smb2_negotiate_rsp
*rsp
;
330 struct TCP_Server_Info
*server
= ses
->server
;
331 int blob_offset
, blob_length
;
333 int flags
= CIFS_NEG_OP
;
335 cifs_dbg(FYI
, "Negotiate protocol\n");
338 WARN(1, "%s: server is NULL!\n", __func__
);
342 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
346 req
->hdr
.SessionId
= 0;
348 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
350 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
351 inc_rfc1001_len(req
, 2);
353 /* only one of SMB2 signing flags may be set in SMB2 request */
355 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
356 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
357 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
359 req
->SecurityMode
= 0;
361 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
363 memcpy(req
->ClientGUID
, cifs_client_guid
, SMB2_CLIENT_GUID_SIZE
);
365 iov
[0].iov_base
= (char *)req
;
366 /* 4 for rfc1002 length field */
367 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
369 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
);
371 rsp
= (struct smb2_negotiate_rsp
*)iov
[0].iov_base
;
373 * No tcon so can't do
374 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
379 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
381 /* BB we may eventually want to match the negotiated vs. requested
382 dialect, even though we are only requesting one at a time */
383 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
384 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
385 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
386 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
387 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
388 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
390 cifs_dbg(VFS
, "Illegal dialect returned by server %d\n",
391 le16_to_cpu(rsp
->DialectRevision
));
395 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
397 /* SMB2 only has an extended negflavor */
398 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
399 server
->maxBuf
= le32_to_cpu(rsp
->MaxTransactSize
);
400 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
401 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
402 /* BB Do we need to validate the SecurityMode? */
403 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
404 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
406 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
408 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
410 if (blob_length
== 0) {
411 cifs_dbg(VFS
, "missing security blob on negprot\n");
416 rc
= cifs_enable_signing(server
, ses
->sign
);
417 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
421 rc
= decode_neg_token_init(security_blob
, blob_length
,
432 free_rsp_buf(resp_buftype
, rsp
);
437 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
438 const struct nls_table
*nls_cp
)
440 struct smb2_sess_setup_req
*req
;
441 struct smb2_sess_setup_rsp
*rsp
= NULL
;
445 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
446 struct TCP_Server_Info
*server
= ses
->server
;
449 char *ntlmssp_blob
= NULL
;
450 bool use_spnego
= false; /* else use raw ntlmssp */
452 cifs_dbg(FYI
, "Session Setup\n");
455 WARN(1, "%s: server is NULL!\n", __func__
);
460 * If memory allocation is successful, caller of this function
463 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
467 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
468 ses
->sectype
= RawNTLMSSP
;
470 ssetup_ntlmssp_authenticate
:
471 if (phase
== NtLmChallenge
)
472 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
474 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
478 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
479 req
->VcNumber
= 0; /* MBZ */
480 /* to enable echos and oplocks */
481 req
->hdr
.CreditRequest
= cpu_to_le16(3);
483 /* only one of SMB2 signing flags may be set in SMB2 request */
485 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
486 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
487 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
489 req
->SecurityMode
= 0;
491 req
->Capabilities
= 0;
492 req
->Channel
= 0; /* MBZ */
494 iov
[0].iov_base
= (char *)req
;
495 /* 4 for rfc1002 length field and 1 for pad */
496 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
497 if (phase
== NtLmNegotiate
) {
498 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
500 if (ntlmssp_blob
== NULL
) {
504 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
506 /* blob_length = build_spnego_ntlmssp_blob(
508 sizeof(struct _NEGOTIATE_MESSAGE),
510 /* BB eventually need to add this */
511 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
516 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
517 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
518 security_blob
= ntlmssp_blob
;
520 } else if (phase
== NtLmAuthenticate
) {
521 req
->hdr
.SessionId
= ses
->Suid
;
522 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
524 if (ntlmssp_blob
== NULL
) {
528 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
531 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n",
533 goto ssetup_exit
; /* BB double check error handling */
536 /* blob_length = build_spnego_ntlmssp_blob(
540 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
545 security_blob
= ntlmssp_blob
;
548 cifs_dbg(VFS
, "illegal ntlmssp phase\n");
553 /* Testing shows that buffer offset must be at location of Buffer[0] */
554 req
->SecurityBufferOffset
=
555 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
556 1 /* pad */ - 4 /* rfc1001 len */);
557 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
558 iov
[1].iov_base
= security_blob
;
559 iov
[1].iov_len
= blob_length
;
561 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
563 /* BB add code to build os and lm fields */
565 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
,
566 CIFS_LOG_ERROR
| CIFS_NEG_OP
);
568 kfree(security_blob
);
569 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
570 if (resp_buftype
!= CIFS_NO_BUFFER
&&
571 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
572 if (phase
!= NtLmNegotiate
) {
573 cifs_dbg(VFS
, "Unexpected more processing error\n");
576 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
577 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
578 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
579 le16_to_cpu(rsp
->SecurityBufferOffset
));
584 /* NTLMSSP Negotiate sent now processing challenge (response) */
585 phase
= NtLmChallenge
; /* process ntlmssp challenge */
586 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
587 ses
->Suid
= rsp
->hdr
.SessionId
;
588 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
589 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
593 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
594 * but at least the raw NTLMSSP case works.
597 * No tcon so can't do
598 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
603 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
605 free_rsp_buf(resp_buftype
, rsp
);
607 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
608 if ((phase
== NtLmChallenge
) && (rc
== 0))
609 goto ssetup_ntlmssp_authenticate
;
614 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
616 struct smb2_logoff_req
*req
; /* response is also trivial struct */
618 struct TCP_Server_Info
*server
;
620 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
622 if (ses
&& (ses
->server
))
623 server
= ses
->server
;
627 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
631 /* since no tcon, smb2_init can not do this, so do here */
632 req
->hdr
.SessionId
= ses
->Suid
;
634 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
636 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
638 * No tcon so can't do
639 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
644 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
646 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
649 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
652 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
653 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
655 struct smb2_tree_connect_req
*req
;
656 struct smb2_tree_connect_rsp
*rsp
= NULL
;
661 struct TCP_Server_Info
*server
;
662 __le16
*unc_path
= NULL
;
664 cifs_dbg(FYI
, "TCON\n");
666 if ((ses
->server
) && tree
)
667 server
= ses
->server
;
671 if (tcon
&& tcon
->bad_network_name
)
674 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
675 if (unc_path
== NULL
)
678 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
680 if (unc_path_len
< 2) {
685 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
692 /* since no tcon, smb2_init can not do this, so do here */
693 req
->hdr
.SessionId
= ses
->Suid
;
694 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
695 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
698 iov
[0].iov_base
= (char *)req
;
699 /* 4 for rfc1002 length field and 1 for pad */
700 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
702 /* Testing shows that buffer offset must be at location of Buffer[0] */
703 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
704 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
705 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
706 iov
[1].iov_base
= unc_path
;
707 iov
[1].iov_len
= unc_path_len
;
709 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
711 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
712 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
716 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
717 tcon
->need_reconnect
= true;
719 goto tcon_error_exit
;
723 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
727 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
728 cifs_dbg(FYI
, "connection to disk share\n");
729 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
731 cifs_dbg(FYI
, "connection to pipe share\n");
732 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
734 cifs_dbg(FYI
, "connection to printer\n");
736 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
738 goto tcon_error_exit
;
741 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
742 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
743 tcon
->tidStatus
= CifsGood
;
744 tcon
->need_reconnect
= false;
745 tcon
->tid
= rsp
->hdr
.TreeId
;
746 strncpy(tcon
->treeName
, tree
, MAX_TREE_SIZE
);
748 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
749 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
750 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
753 free_rsp_buf(resp_buftype
, rsp
);
758 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
759 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
760 tcon
->bad_network_name
= true;
766 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
768 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
770 struct TCP_Server_Info
*server
;
771 struct cifs_ses
*ses
= tcon
->ses
;
773 cifs_dbg(FYI
, "Tree Disconnect\n");
775 if (ses
&& (ses
->server
))
776 server
= ses
->server
;
780 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
783 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
787 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
789 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
794 static struct create_lease
*
795 create_lease_buf(u8
*lease_key
, u8 oplock
)
797 struct create_lease
*buf
;
799 buf
= kzalloc(sizeof(struct create_lease
), GFP_KERNEL
);
803 buf
->lcontext
.LeaseKeyLow
= cpu_to_le64(*((u64
*)lease_key
));
804 buf
->lcontext
.LeaseKeyHigh
= cpu_to_le64(*((u64
*)(lease_key
+ 8)));
805 if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
)
806 buf
->lcontext
.LeaseState
= SMB2_LEASE_WRITE_CACHING
|
807 SMB2_LEASE_READ_CACHING
;
808 else if (oplock
== SMB2_OPLOCK_LEVEL_II
)
809 buf
->lcontext
.LeaseState
= SMB2_LEASE_READ_CACHING
;
810 else if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
)
811 buf
->lcontext
.LeaseState
= SMB2_LEASE_HANDLE_CACHING
|
812 SMB2_LEASE_READ_CACHING
|
813 SMB2_LEASE_WRITE_CACHING
;
815 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
816 (struct create_lease
, lcontext
));
817 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context
));
818 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
819 (struct create_lease
, Name
));
820 buf
->ccontext
.NameLength
= cpu_to_le16(4);
829 parse_lease_state(struct smb2_create_rsp
*rsp
)
832 struct create_lease
*lc
;
835 data_offset
= (char *)rsp
;
836 data_offset
+= 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
837 lc
= (struct create_lease
*)data_offset
;
839 char *name
= le16_to_cpu(lc
->ccontext
.NameOffset
) + (char *)lc
;
840 if (le16_to_cpu(lc
->ccontext
.NameLength
) != 4 ||
841 strncmp(name
, "RqLs", 4)) {
842 lc
= (struct create_lease
*)((char *)lc
843 + le32_to_cpu(lc
->ccontext
.Next
));
846 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS
)
847 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
850 } while (le32_to_cpu(lc
->ccontext
.Next
) != 0);
855 return smb2_map_lease_to_oplock(lc
->lcontext
.LeaseState
);
859 SMB2_open(const unsigned int xid
, struct cifs_tcon
*tcon
, __le16
*path
,
860 u64
*persistent_fid
, u64
*volatile_fid
, __u32 desired_access
,
861 __u32 create_disposition
, __u32 file_attributes
, __u32 create_options
,
862 __u8
*oplock
, struct smb2_file_all_info
*buf
)
864 struct smb2_create_req
*req
;
865 struct smb2_create_rsp
*rsp
;
866 struct TCP_Server_Info
*server
;
867 struct cifs_ses
*ses
= tcon
->ses
;
871 __le16
*copy_path
= NULL
;
876 cifs_dbg(FYI
, "create/open\n");
878 if (ses
&& (ses
->server
))
879 server
= ses
->server
;
883 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
887 req
->ImpersonationLevel
= IL_IMPERSONATION
;
888 req
->DesiredAccess
= cpu_to_le32(desired_access
);
889 /* File attributes ignored on open (used in create though) */
890 req
->FileAttributes
= cpu_to_le32(file_attributes
);
891 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
892 req
->CreateDisposition
= cpu_to_le32(create_disposition
);
893 req
->CreateOptions
= cpu_to_le32(create_options
);
894 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
895 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
)
896 - 8 /* pad */ - 4 /* do not count rfc1001 len field */);
898 iov
[0].iov_base
= (char *)req
;
899 /* 4 for rfc1002 length field */
900 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
902 /* MUST set path len (NameLength) to 0 opening root of share */
903 if (uni_path_len
>= 4) {
904 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
905 /* -1 since last byte is buf[0] which is sent below (path) */
907 if (uni_path_len
% 8 != 0) {
908 copy_size
= uni_path_len
/ 8 * 8;
909 if (copy_size
< uni_path_len
)
912 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
915 memcpy((char *)copy_path
, (const char *)path
,
917 uni_path_len
= copy_size
;
921 iov
[1].iov_len
= uni_path_len
;
922 iov
[1].iov_base
= path
;
924 * -1 since last byte is buf[0] which was counted in
927 inc_rfc1001_len(req
, uni_path_len
- 1);
930 req
->hdr
.smb2_buf_length
= cpu_to_be32(be32_to_cpu(
931 req
->hdr
.smb2_buf_length
) + 8 - 1);
936 if (!server
->oplocks
)
937 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
939 if (!(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
940 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
941 req
->RequestedOplockLevel
= *oplock
;
943 iov
[num_iovecs
].iov_base
= create_lease_buf(oplock
+1, *oplock
);
944 if (iov
[num_iovecs
].iov_base
== NULL
) {
945 cifs_small_buf_release(req
);
949 iov
[num_iovecs
].iov_len
= sizeof(struct create_lease
);
950 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
951 req
->CreateContextsOffset
= cpu_to_le32(
952 sizeof(struct smb2_create_req
) - 4 - 8 +
953 iov
[num_iovecs
-1].iov_len
);
954 req
->CreateContextsLength
= cpu_to_le32(
955 sizeof(struct create_lease
));
956 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_lease
));
960 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
961 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
964 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
968 *persistent_fid
= rsp
->PersistentFileId
;
969 *volatile_fid
= rsp
->VolatileFileId
;
972 memcpy(buf
, &rsp
->CreationTime
, 32);
973 buf
->AllocationSize
= rsp
->AllocationSize
;
974 buf
->EndOfFile
= rsp
->EndofFile
;
975 buf
->Attributes
= rsp
->FileAttributes
;
976 buf
->NumberOfLinks
= cpu_to_le32(1);
977 buf
->DeletePending
= 0;
980 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
981 *oplock
= parse_lease_state(rsp
);
983 *oplock
= rsp
->OplockLevel
;
986 free_rsp_buf(resp_buftype
, rsp
);
991 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
992 u64 persistent_fid
, u64 volatile_fid
)
994 struct smb2_close_req
*req
;
995 struct smb2_close_rsp
*rsp
;
996 struct TCP_Server_Info
*server
;
997 struct cifs_ses
*ses
= tcon
->ses
;
1002 cifs_dbg(FYI
, "Close\n");
1004 if (ses
&& (ses
->server
))
1005 server
= ses
->server
;
1009 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1013 req
->PersistentFileId
= persistent_fid
;
1014 req
->VolatileFileId
= volatile_fid
;
1016 iov
[0].iov_base
= (char *)req
;
1017 /* 4 for rfc1002 length field */
1018 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1020 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1021 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1025 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1029 /* BB FIXME - decode close response, update inode for caching */
1032 free_rsp_buf(resp_buftype
, rsp
);
1037 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1038 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1041 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1042 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1043 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1044 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1047 if (buffer_length
< min_buf_size
) {
1048 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1049 buffer_length
, min_buf_size
);
1053 /* check if beyond RFC1001 maximum length */
1054 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1055 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1056 buffer_length
, smb_len
);
1060 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1061 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1069 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1070 * Caller must free buffer.
1073 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1074 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1078 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1084 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1088 memcpy(data
, begin_of_buf
, buffer_length
);
1094 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1095 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1096 size_t output_len
, size_t min_len
, void *data
)
1098 struct smb2_query_info_req
*req
;
1099 struct smb2_query_info_rsp
*rsp
= NULL
;
1103 struct TCP_Server_Info
*server
;
1104 struct cifs_ses
*ses
= tcon
->ses
;
1106 cifs_dbg(FYI
, "Query Info\n");
1108 if (ses
&& (ses
->server
))
1109 server
= ses
->server
;
1113 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1117 req
->InfoType
= SMB2_O_INFO_FILE
;
1118 req
->FileInfoClass
= info_class
;
1119 req
->PersistentFileId
= persistent_fid
;
1120 req
->VolatileFileId
= volatile_fid
;
1121 /* 4 for rfc1002 length field and 1 for Buffer */
1122 req
->InputBufferOffset
=
1123 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1124 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1126 iov
[0].iov_base
= (char *)req
;
1127 /* 4 for rfc1002 length field */
1128 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1130 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1131 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1134 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1138 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1139 le32_to_cpu(rsp
->OutputBufferLength
),
1140 &rsp
->hdr
, min_len
, data
);
1143 free_rsp_buf(resp_buftype
, rsp
);
1148 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1149 u64 persistent_fid
, u64 volatile_fid
,
1150 struct smb2_file_all_info
*data
)
1152 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1153 FILE_ALL_INFORMATION
,
1154 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1155 sizeof(struct smb2_file_all_info
), data
);
1159 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1160 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1162 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1163 FILE_INTERNAL_INFORMATION
,
1164 sizeof(struct smb2_file_internal_info
),
1165 sizeof(struct smb2_file_internal_info
), uniqueid
);
1169 * This is a no-op for now. We're not really interested in the reply, but
1170 * rather in the fact that the server sent one and that server->lstrp
1173 * FIXME: maybe we should consider checking that the reply matches request?
1176 smb2_echo_callback(struct mid_q_entry
*mid
)
1178 struct TCP_Server_Info
*server
= mid
->callback_data
;
1179 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1180 unsigned int credits_received
= 1;
1182 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1183 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1185 DeleteMidQEntry(mid
);
1186 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1190 SMB2_echo(struct TCP_Server_Info
*server
)
1192 struct smb2_echo_req
*req
;
1195 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1198 cifs_dbg(FYI
, "In echo request\n");
1200 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1204 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1206 iov
.iov_base
= (char *)req
;
1207 /* 4 for rfc1002 length field */
1208 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1210 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1213 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
1215 cifs_small_buf_release(req
);
1220 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1223 struct smb2_flush_req
*req
;
1224 struct TCP_Server_Info
*server
;
1225 struct cifs_ses
*ses
= tcon
->ses
;
1230 cifs_dbg(FYI
, "Flush\n");
1232 if (ses
&& (ses
->server
))
1233 server
= ses
->server
;
1237 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1241 req
->PersistentFileId
= persistent_fid
;
1242 req
->VolatileFileId
= volatile_fid
;
1244 iov
[0].iov_base
= (char *)req
;
1245 /* 4 for rfc1002 length field */
1246 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1248 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1250 if ((rc
!= 0) && tcon
)
1251 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1253 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1258 * To form a chain of read requests, any read requests after the first should
1259 * have the end_of_chain boolean set to true.
1262 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1263 unsigned int remaining_bytes
, int request_type
)
1266 struct smb2_read_req
*req
= NULL
;
1268 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1271 if (io_parms
->tcon
->ses
->server
== NULL
)
1272 return -ECONNABORTED
;
1274 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1276 req
->PersistentFileId
= io_parms
->persistent_fid
;
1277 req
->VolatileFileId
= io_parms
->volatile_fid
;
1278 req
->ReadChannelInfoOffset
= 0; /* reserved */
1279 req
->ReadChannelInfoLength
= 0; /* reserved */
1280 req
->Channel
= 0; /* reserved */
1281 req
->MinimumCount
= 0;
1282 req
->Length
= cpu_to_le32(io_parms
->length
);
1283 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1285 if (request_type
& CHAINED_REQUEST
) {
1286 if (!(request_type
& END_OF_CHAIN
)) {
1287 /* 4 for rfc1002 length field */
1288 req
->hdr
.NextCommand
=
1289 cpu_to_le32(get_rfc1002_length(req
) + 4);
1290 } else /* END_OF_CHAIN */
1291 req
->hdr
.NextCommand
= 0;
1292 if (request_type
& RELATED_REQUEST
) {
1293 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1295 * Related requests use info from previous read request
1298 req
->hdr
.SessionId
= 0xFFFFFFFF;
1299 req
->hdr
.TreeId
= 0xFFFFFFFF;
1300 req
->PersistentFileId
= 0xFFFFFFFF;
1301 req
->VolatileFileId
= 0xFFFFFFFF;
1304 if (remaining_bytes
> io_parms
->length
)
1305 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1307 req
->RemainingBytes
= 0;
1309 iov
[0].iov_base
= (char *)req
;
1310 /* 4 for rfc1002 length field */
1311 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1316 smb2_readv_callback(struct mid_q_entry
*mid
)
1318 struct cifs_readdata
*rdata
= mid
->callback_data
;
1319 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1320 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1321 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1322 unsigned int credits_received
= 1;
1323 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1325 .rq_pages
= rdata
->pages
,
1326 .rq_npages
= rdata
->nr_pages
,
1327 .rq_pagesz
= rdata
->pagesz
,
1328 .rq_tailsz
= rdata
->tailsz
};
1330 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1331 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
1334 switch (mid
->mid_state
) {
1335 case MID_RESPONSE_RECEIVED
:
1336 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1337 /* result already set, check signature */
1341 rc
= smb2_verify_signature(&rqst
, server
);
1343 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
1346 /* FIXME: should this be counted toward the initiating task? */
1347 task_io_account_read(rdata
->bytes
);
1348 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1350 case MID_REQUEST_SUBMITTED
:
1351 case MID_RETRY_NEEDED
:
1352 rdata
->result
= -EAGAIN
;
1355 if (rdata
->result
!= -ENODATA
)
1356 rdata
->result
= -EIO
;
1360 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1362 queue_work(cifsiod_wq
, &rdata
->work
);
1363 DeleteMidQEntry(mid
);
1364 add_credits(server
, credits_received
, 0);
1367 /* smb2_async_readv - send an async write, and set up mid to handle result */
1369 smb2_async_readv(struct cifs_readdata
*rdata
)
1372 struct smb2_hdr
*buf
;
1373 struct cifs_io_parms io_parms
;
1374 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1377 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
1378 __func__
, rdata
->offset
, rdata
->bytes
);
1380 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1381 io_parms
.offset
= rdata
->offset
;
1382 io_parms
.length
= rdata
->bytes
;
1383 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1384 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1385 io_parms
.pid
= rdata
->pid
;
1386 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1390 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1391 /* 4 for rfc1002 length field */
1392 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1394 kref_get(&rdata
->refcount
);
1395 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1396 cifs_readv_receive
, smb2_readv_callback
,
1399 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1400 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1403 cifs_small_buf_release(buf
);
1408 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1409 unsigned int *nbytes
, char **buf
, int *buf_type
)
1411 int resp_buftype
, rc
= -EACCES
;
1412 struct smb2_read_rsp
*rsp
= NULL
;
1416 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1420 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1421 &resp_buftype
, CIFS_LOG_ERROR
);
1423 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1425 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1426 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1431 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1432 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
1434 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1435 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1436 (*nbytes
> io_parms
->length
)) {
1437 cifs_dbg(FYI
, "bad length %d for count %d\n",
1438 *nbytes
, io_parms
->length
);
1445 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1447 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1448 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1449 *buf
= iov
[0].iov_base
;
1450 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1451 *buf_type
= CIFS_SMALL_BUFFER
;
1452 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1453 *buf_type
= CIFS_LARGE_BUFFER
;
1459 * Check the mid_state and signature on received buffer (if any), and queue the
1460 * workqueue completion task.
1463 smb2_writev_callback(struct mid_q_entry
*mid
)
1465 struct cifs_writedata
*wdata
= mid
->callback_data
;
1466 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1467 unsigned int written
;
1468 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1469 unsigned int credits_received
= 1;
1471 switch (mid
->mid_state
) {
1472 case MID_RESPONSE_RECEIVED
:
1473 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1474 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1475 if (wdata
->result
!= 0)
1478 written
= le32_to_cpu(rsp
->DataLength
);
1480 * Mask off high 16 bits when bytes written as returned
1481 * by the server is greater than bytes requested by the
1482 * client. OS/2 servers are known to set incorrect
1485 if (written
> wdata
->bytes
)
1488 if (written
< wdata
->bytes
)
1489 wdata
->result
= -ENOSPC
;
1491 wdata
->bytes
= written
;
1493 case MID_REQUEST_SUBMITTED
:
1494 case MID_RETRY_NEEDED
:
1495 wdata
->result
= -EAGAIN
;
1498 wdata
->result
= -EIO
;
1503 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1505 queue_work(cifsiod_wq
, &wdata
->work
);
1506 DeleteMidQEntry(mid
);
1507 add_credits(tcon
->ses
->server
, credits_received
, 0);
1510 /* smb2_async_writev - send an async write, and set up mid to handle result */
1512 smb2_async_writev(struct cifs_writedata
*wdata
)
1515 struct smb2_write_req
*req
= NULL
;
1516 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1518 struct smb_rqst rqst
;
1520 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1522 goto async_writev_out
;
1524 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1526 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1527 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1528 req
->WriteChannelInfoOffset
= 0;
1529 req
->WriteChannelInfoLength
= 0;
1531 req
->Offset
= cpu_to_le64(wdata
->offset
);
1532 /* 4 for rfc1002 length field */
1533 req
->DataOffset
= cpu_to_le16(
1534 offsetof(struct smb2_write_req
, Buffer
) - 4);
1535 req
->RemainingBytes
= 0;
1537 /* 4 for rfc1002 length field and 1 for Buffer */
1538 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1543 rqst
.rq_pages
= wdata
->pages
;
1544 rqst
.rq_npages
= wdata
->nr_pages
;
1545 rqst
.rq_pagesz
= wdata
->pagesz
;
1546 rqst
.rq_tailsz
= wdata
->tailsz
;
1548 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
1549 wdata
->offset
, wdata
->bytes
);
1551 req
->Length
= cpu_to_le32(wdata
->bytes
);
1553 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1555 kref_get(&wdata
->refcount
);
1556 rc
= cifs_call_async(tcon
->ses
->server
, &rqst
, NULL
,
1557 smb2_writev_callback
, wdata
, 0);
1560 kref_put(&wdata
->refcount
, cifs_writedata_release
);
1561 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1565 cifs_small_buf_release(req
);
1570 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1571 * The length field from io_parms must be at least 1 and indicates a number of
1572 * elements with data to write that begins with position 1 in iov array. All
1573 * data length is specified by count.
1576 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1577 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1580 struct smb2_write_req
*req
= NULL
;
1581 struct smb2_write_rsp
*rsp
= NULL
;
1588 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1592 if (io_parms
->tcon
->ses
->server
== NULL
)
1593 return -ECONNABORTED
;
1595 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1597 req
->PersistentFileId
= io_parms
->persistent_fid
;
1598 req
->VolatileFileId
= io_parms
->volatile_fid
;
1599 req
->WriteChannelInfoOffset
= 0;
1600 req
->WriteChannelInfoLength
= 0;
1602 req
->Length
= cpu_to_le32(io_parms
->length
);
1603 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1604 /* 4 for rfc1002 length field */
1605 req
->DataOffset
= cpu_to_le16(
1606 offsetof(struct smb2_write_req
, Buffer
) - 4);
1607 req
->RemainingBytes
= 0;
1609 iov
[0].iov_base
= (char *)req
;
1610 /* 4 for rfc1002 length field and 1 for Buffer */
1611 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1613 /* length of entire message including data to be written */
1614 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1616 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
1618 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
1621 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
1622 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
1624 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1626 free_rsp_buf(resp_buftype
, rsp
);
1631 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
1634 unsigned int entrycount
= 0;
1635 unsigned int next_offset
= 0;
1636 FILE_DIRECTORY_INFO
*entryptr
;
1638 if (bufstart
== NULL
)
1641 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
1644 entryptr
= (FILE_DIRECTORY_INFO
*)
1645 ((char *)entryptr
+ next_offset
);
1647 if ((char *)entryptr
+ size
> end_of_buf
) {
1648 cifs_dbg(VFS
, "malformed search entry would overflow\n");
1652 len
= le32_to_cpu(entryptr
->FileNameLength
);
1653 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
1654 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
1659 *lastentry
= (char *)entryptr
;
1662 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
1674 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
1675 u64 persistent_fid
, u64 volatile_fid
, int index
,
1676 struct cifs_search_info
*srch_inf
)
1678 struct smb2_query_directory_req
*req
;
1679 struct smb2_query_directory_rsp
*rsp
= NULL
;
1684 unsigned char *bufptr
;
1685 struct TCP_Server_Info
*server
;
1686 struct cifs_ses
*ses
= tcon
->ses
;
1687 __le16 asteriks
= cpu_to_le16('*');
1689 unsigned int output_size
= CIFSMaxBufSize
;
1690 size_t info_buf_size
;
1692 if (ses
&& (ses
->server
))
1693 server
= ses
->server
;
1697 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
1701 switch (srch_inf
->info_level
) {
1702 case SMB_FIND_FILE_DIRECTORY_INFO
:
1703 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
1704 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
1706 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
1707 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
1708 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
1711 cifs_dbg(VFS
, "info level %u isn't supported\n",
1712 srch_inf
->info_level
);
1717 req
->FileIndex
= cpu_to_le32(index
);
1718 req
->PersistentFileId
= persistent_fid
;
1719 req
->VolatileFileId
= volatile_fid
;
1722 bufptr
= req
->Buffer
;
1723 memcpy(bufptr
, &asteriks
, len
);
1725 req
->FileNameOffset
=
1726 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
1727 req
->FileNameLength
= cpu_to_le16(len
);
1729 * BB could be 30 bytes or so longer if we used SMB2 specific
1730 * buffer lengths, but this is safe and close enough.
1732 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
1733 output_size
= min_t(unsigned int, output_size
, 2 << 15);
1734 req
->OutputBufferLength
= cpu_to_le32(output_size
);
1736 iov
[0].iov_base
= (char *)req
;
1737 /* 4 for RFC1001 length and 1 for Buffer */
1738 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1740 iov
[1].iov_base
= (char *)(req
->Buffer
);
1741 iov
[1].iov_len
= len
;
1743 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
1745 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
1746 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
1749 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
1753 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1754 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
1759 srch_inf
->unicode
= true;
1761 if (srch_inf
->ntwrk_buf_start
) {
1762 if (srch_inf
->smallBuf
)
1763 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
1765 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
1767 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
1768 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
1769 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
1770 /* 4 for rfc1002 length field */
1771 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
1772 srch_inf
->entries_in_buffer
=
1773 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
1774 &srch_inf
->last_entry
, info_buf_size
);
1775 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
1776 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
1777 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
1778 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
1779 if (resp_buftype
== CIFS_LARGE_BUFFER
)
1780 srch_inf
->smallBuf
= false;
1781 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
1782 srch_inf
->smallBuf
= true;
1784 cifs_dbg(VFS
, "illegal search buffer type\n");
1786 if (rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
)
1787 srch_inf
->endOfSearch
= 1;
1789 srch_inf
->endOfSearch
= 0;
1794 free_rsp_buf(resp_buftype
, rsp
);
1799 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1800 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
1801 unsigned int num
, void **data
, unsigned int *size
)
1803 struct smb2_set_info_req
*req
;
1804 struct smb2_set_info_rsp
*rsp
= NULL
;
1809 struct TCP_Server_Info
*server
;
1810 struct cifs_ses
*ses
= tcon
->ses
;
1812 if (ses
&& (ses
->server
))
1813 server
= ses
->server
;
1820 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
1824 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
1830 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
1832 req
->InfoType
= SMB2_O_INFO_FILE
;
1833 req
->FileInfoClass
= info_class
;
1834 req
->PersistentFileId
= persistent_fid
;
1835 req
->VolatileFileId
= volatile_fid
;
1837 /* 4 for RFC1001 length and 1 for Buffer */
1839 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
1840 req
->BufferLength
= cpu_to_le32(*size
);
1842 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
1844 memcpy(req
->Buffer
, *data
, *size
);
1846 iov
[0].iov_base
= (char *)req
;
1847 /* 4 for RFC1001 length */
1848 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1850 for (i
= 1; i
< num
; i
++) {
1851 inc_rfc1001_len(req
, size
[i
]);
1852 le32_add_cpu(&req
->BufferLength
, size
[i
]);
1853 iov
[i
].iov_base
= (char *)data
[i
];
1854 iov
[i
].iov_len
= size
[i
];
1857 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
1858 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
1861 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
1865 free_rsp_buf(resp_buftype
, rsp
);
1871 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
1872 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
1874 struct smb2_file_rename_info info
;
1876 unsigned int size
[2];
1878 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
1880 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
1884 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
1885 /* 0 = fail if target already exists */
1886 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
1887 info
.FileNameLength
= cpu_to_le32(len
);
1890 size
[0] = sizeof(struct smb2_file_rename_info
);
1892 data
[1] = target_file
;
1893 size
[1] = len
+ 2 /* null */;
1895 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1896 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
1903 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
1904 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
1906 struct smb2_file_link_info info
;
1908 unsigned int size
[2];
1910 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
1912 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
1916 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
1917 /* 0 = fail if link already exists */
1918 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
1919 info
.FileNameLength
= cpu_to_le32(len
);
1922 size
[0] = sizeof(struct smb2_file_link_info
);
1924 data
[1] = target_file
;
1925 size
[1] = len
+ 2 /* null */;
1927 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1928 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
1934 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1935 u64 volatile_fid
, u32 pid
, __le64
*eof
)
1937 struct smb2_file_eof_info info
;
1941 info
.EndOfFile
= *eof
;
1944 size
= sizeof(struct smb2_file_eof_info
);
1946 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
1947 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
1951 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1952 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
1955 size
= sizeof(FILE_BASIC_INFO
);
1956 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1957 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
1958 (void **)&buf
, &size
);
1962 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
1963 const u64 persistent_fid
, const u64 volatile_fid
,
1967 struct smb2_oplock_break
*req
= NULL
;
1969 cifs_dbg(FYI
, "SMB2_oplock_break\n");
1970 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
1975 req
->VolatileFid
= volatile_fid
;
1976 req
->PersistentFid
= persistent_fid
;
1977 req
->OplockLevel
= oplock_level
;
1978 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1980 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
1981 /* SMB2 buffer freed by function above */
1984 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
1985 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
1992 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
1993 struct kstatfs
*kst
)
1995 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
1996 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
1997 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
1998 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
1999 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2004 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2005 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2008 struct smb2_query_info_req
*req
;
2010 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2012 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2015 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2019 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2020 req
->FileInfoClass
= level
;
2021 req
->PersistentFileId
= persistent_fid
;
2022 req
->VolatileFileId
= volatile_fid
;
2023 /* 4 for rfc1002 length field and 1 for pad */
2024 req
->InputBufferOffset
=
2025 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2026 req
->OutputBufferLength
= cpu_to_le32(
2027 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2029 iov
->iov_base
= (char *)req
;
2030 /* 4 for rfc1002 length field */
2031 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2036 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2037 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2039 struct smb2_query_info_rsp
*rsp
= NULL
;
2043 struct cifs_ses
*ses
= tcon
->ses
;
2044 struct smb2_fs_full_size_info
*info
= NULL
;
2046 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2047 sizeof(struct smb2_fs_full_size_info
),
2048 persistent_fid
, volatile_fid
);
2052 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2054 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2057 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2059 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2060 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2061 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2062 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2063 sizeof(struct smb2_fs_full_size_info
));
2065 copy_fs_info_to_kstatfs(info
, fsdata
);
2068 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2073 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2074 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2075 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2078 struct smb2_lock_req
*req
= NULL
;
2083 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2085 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2089 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2090 req
->LockCount
= cpu_to_le16(num_lock
);
2092 req
->PersistentFileId
= persist_fid
;
2093 req
->VolatileFileId
= volatile_fid
;
2095 count
= num_lock
* sizeof(struct smb2_lock_element
);
2096 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2098 iov
[0].iov_base
= (char *)req
;
2099 /* 4 for rfc1002 length field and count for all locks */
2100 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2101 iov
[1].iov_base
= (char *)buf
;
2102 iov
[1].iov_len
= count
;
2104 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2105 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2107 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2108 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2115 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2116 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2117 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2120 struct smb2_lock_element lock
;
2122 lock
.Offset
= cpu_to_le64(offset
);
2123 lock
.Length
= cpu_to_le64(length
);
2124 lock
.Flags
= cpu_to_le32(lock_flags
);
2125 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2126 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2128 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2132 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2133 __u8
*lease_key
, const __le32 lease_state
)
2136 struct smb2_lease_ack
*req
= NULL
;
2138 cifs_dbg(FYI
, "SMB2_lease_break\n");
2139 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2144 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2145 req
->StructureSize
= cpu_to_le16(36);
2146 inc_rfc1001_len(req
, 12);
2148 memcpy(req
->LeaseKey
, lease_key
, 16);
2149 req
->LeaseState
= lease_state
;
2151 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2152 /* SMB2 buffer freed by function above */
2155 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2156 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);