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 */
114 if (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
)
115 hdr
->CreditCharge
= cpu_to_le16(1);
116 /* else CreditCharge MBZ */
118 hdr
->TreeId
= tcon
->tid
;
119 /* Uid is not converted */
121 hdr
->SessionId
= tcon
->ses
->Suid
;
122 /* BB check following DFS flags BB */
123 /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */
124 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
)
125 hdr
->Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
126 /* BB how does SMB2 do case sensitive? */
128 hdr->Flags |= SMBFLG_CASELESS; */
129 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
)
130 hdr
->Flags
|= SMB2_FLAGS_SIGNED
;
132 pdu
->StructureSize2
= cpu_to_le16(parmsize
);
137 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
140 struct nls_table
*nls_codepage
;
141 struct cifs_ses
*ses
;
142 struct TCP_Server_Info
*server
;
145 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
146 * check for tcp and smb session status done differently
147 * for those three - in the calling routine.
152 if (smb2_command
== SMB2_TREE_CONNECT
)
155 if (tcon
->tidStatus
== CifsExiting
) {
157 * only tree disconnect, open, and write,
158 * (and ulogoff which does not have tcon)
159 * are allowed as we start force umount.
161 if ((smb2_command
!= SMB2_WRITE
) &&
162 (smb2_command
!= SMB2_CREATE
) &&
163 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
164 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
169 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
170 (!tcon
->ses
->server
))
174 server
= ses
->server
;
177 * Give demultiplex thread up to 10 seconds to reconnect, should be
178 * greater than cifs socket timeout which is 7 seconds
180 while (server
->tcpStatus
== CifsNeedReconnect
) {
182 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
183 * here since they are implicitly done when session drops.
185 switch (smb2_command
) {
187 * BB Should we keep oplock break and add flush to exceptions?
189 case SMB2_TREE_DISCONNECT
:
192 case SMB2_OPLOCK_BREAK
:
196 wait_event_interruptible_timeout(server
->response_q
,
197 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
199 /* are we still trying to reconnect? */
200 if (server
->tcpStatus
!= CifsNeedReconnect
)
204 * on "soft" mounts we wait once. Hard mounts keep
205 * retrying until process is killed or server comes
209 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
214 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
217 nls_codepage
= load_nls_default();
220 * need to prevent multiple threads trying to simultaneously reconnect
221 * the same SMB session
223 mutex_lock(&tcon
->ses
->session_mutex
);
224 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
225 if (!rc
&& tcon
->ses
->need_reconnect
)
226 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
228 if (rc
|| !tcon
->need_reconnect
) {
229 mutex_unlock(&tcon
->ses
->session_mutex
);
233 cifs_mark_open_files_invalid(tcon
);
234 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
235 mutex_unlock(&tcon
->ses
->session_mutex
);
236 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
239 atomic_inc(&tconInfoReconnectCount
);
241 * BB FIXME add code to check if wsize needs update due to negotiated
242 * smb buffer size shrinking.
246 * Check if handle based operation so we know whether we can continue
247 * or not without returning to caller to reset file handle.
250 * BB Is flush done by server on drop of tcp session? Should we special
251 * case it and skip above?
253 switch (smb2_command
) {
259 case SMB2_QUERY_DIRECTORY
:
260 case SMB2_CHANGE_NOTIFY
:
261 case SMB2_QUERY_INFO
:
265 unload_nls(nls_codepage
);
270 * Allocate and return pointer to an SMB request hdr, and set basic
271 * SMB information in the SMB header. If the return code is zero, this
272 * function must have filled in request_buf pointer.
275 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
280 rc
= smb2_reconnect(smb2_command
, tcon
);
284 /* BB eventually switch this to SMB2 specific small buf size */
285 *request_buf
= cifs_small_buf_get();
286 if (*request_buf
== NULL
) {
287 /* BB should we add a retry in here if not a writepage? */
291 smb2_hdr_assemble((struct smb2_hdr
*) *request_buf
, smb2_command
, tcon
);
294 #ifdef CONFIG_CIFS_STATS2
295 uint16_t com_code
= le16_to_cpu(smb2_command
);
296 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
298 cifs_stats_inc(&tcon
->num_smbs_sent
);
305 free_rsp_buf(int resp_buftype
, void *rsp
)
307 if (resp_buftype
== CIFS_SMALL_BUFFER
)
308 cifs_small_buf_release(rsp
);
309 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
310 cifs_buf_release(rsp
);
316 * SMB2 Worker functions follow:
318 * The general structure of the worker functions is:
319 * 1) Call smb2_init (assembles SMB2 header)
320 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
321 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
322 * 4) Decode SMB2 command specific fields in the fixed length area
323 * 5) Decode variable length data area (if any for this SMB2 command type)
324 * 6) Call free smb buffer
330 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
332 struct smb2_negotiate_req
*req
;
333 struct smb2_negotiate_rsp
*rsp
;
337 struct TCP_Server_Info
*server
= ses
->server
;
338 int blob_offset
, blob_length
;
340 int flags
= CIFS_NEG_OP
;
342 cifs_dbg(FYI
, "Negotiate protocol\n");
345 WARN(1, "%s: server is NULL!\n", __func__
);
349 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
353 req
->hdr
.SessionId
= 0;
355 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
357 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
358 inc_rfc1001_len(req
, 2);
360 /* only one of SMB2 signing flags may be set in SMB2 request */
362 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
363 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
364 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
366 req
->SecurityMode
= 0;
368 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
370 memcpy(req
->ClientGUID
, cifs_client_guid
, SMB2_CLIENT_GUID_SIZE
);
372 iov
[0].iov_base
= (char *)req
;
373 /* 4 for rfc1002 length field */
374 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
376 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
);
378 rsp
= (struct smb2_negotiate_rsp
*)iov
[0].iov_base
;
380 * No tcon so can't do
381 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
386 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
388 /* BB we may eventually want to match the negotiated vs. requested
389 dialect, even though we are only requesting one at a time */
390 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
391 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
392 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
393 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
394 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
395 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
396 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
397 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
399 cifs_dbg(VFS
, "Illegal dialect returned by server %d\n",
400 le16_to_cpu(rsp
->DialectRevision
));
404 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
406 /* SMB2 only has an extended negflavor */
407 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
408 server
->maxBuf
= le32_to_cpu(rsp
->MaxTransactSize
);
409 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
410 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
411 /* BB Do we need to validate the SecurityMode? */
412 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
413 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
415 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
417 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
420 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
422 * ses->sectype = RawNTLMSSP;
423 * but for time being this is our only auth choice so doesn't matter.
424 * We just found a server which sets blob length to zero expecting raw.
426 if (blob_length
== 0)
427 cifs_dbg(FYI
, "missing security blob on negprot\n");
429 rc
= cifs_enable_signing(server
, ses
->sign
);
430 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
434 rc
= decode_neg_token_init(security_blob
, blob_length
,
445 free_rsp_buf(resp_buftype
, rsp
);
450 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
451 const struct nls_table
*nls_cp
)
453 struct smb2_sess_setup_req
*req
;
454 struct smb2_sess_setup_rsp
*rsp
= NULL
;
458 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
459 struct TCP_Server_Info
*server
= ses
->server
;
462 char *ntlmssp_blob
= NULL
;
463 bool use_spnego
= false; /* else use raw ntlmssp */
465 cifs_dbg(FYI
, "Session Setup\n");
468 WARN(1, "%s: server is NULL!\n", __func__
);
473 * If memory allocation is successful, caller of this function
476 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
480 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
481 ses
->sectype
= RawNTLMSSP
;
483 ssetup_ntlmssp_authenticate
:
484 if (phase
== NtLmChallenge
)
485 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
487 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
491 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
492 req
->VcNumber
= 0; /* MBZ */
493 /* to enable echos and oplocks */
494 req
->hdr
.CreditRequest
= cpu_to_le16(3);
496 /* only one of SMB2 signing flags may be set in SMB2 request */
498 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
499 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
500 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
502 req
->SecurityMode
= 0;
504 req
->Capabilities
= 0;
505 req
->Channel
= 0; /* MBZ */
507 iov
[0].iov_base
= (char *)req
;
508 /* 4 for rfc1002 length field and 1 for pad */
509 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
510 if (phase
== NtLmNegotiate
) {
511 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
513 if (ntlmssp_blob
== NULL
) {
517 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
519 /* blob_length = build_spnego_ntlmssp_blob(
521 sizeof(struct _NEGOTIATE_MESSAGE),
523 /* BB eventually need to add this */
524 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
529 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
530 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
531 security_blob
= ntlmssp_blob
;
533 } else if (phase
== NtLmAuthenticate
) {
534 req
->hdr
.SessionId
= ses
->Suid
;
535 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
537 if (ntlmssp_blob
== NULL
) {
541 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
544 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n",
546 goto ssetup_exit
; /* BB double check error handling */
549 /* blob_length = build_spnego_ntlmssp_blob(
553 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
558 security_blob
= ntlmssp_blob
;
561 cifs_dbg(VFS
, "illegal ntlmssp phase\n");
566 /* Testing shows that buffer offset must be at location of Buffer[0] */
567 req
->SecurityBufferOffset
=
568 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
569 1 /* pad */ - 4 /* rfc1001 len */);
570 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
571 iov
[1].iov_base
= security_blob
;
572 iov
[1].iov_len
= blob_length
;
574 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
576 /* BB add code to build os and lm fields */
578 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
,
579 CIFS_LOG_ERROR
| CIFS_NEG_OP
);
581 kfree(security_blob
);
582 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
583 if (resp_buftype
!= CIFS_NO_BUFFER
&&
584 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
585 if (phase
!= NtLmNegotiate
) {
586 cifs_dbg(VFS
, "Unexpected more processing error\n");
589 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
590 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
591 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
592 le16_to_cpu(rsp
->SecurityBufferOffset
));
597 /* NTLMSSP Negotiate sent now processing challenge (response) */
598 phase
= NtLmChallenge
; /* process ntlmssp challenge */
599 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
600 ses
->Suid
= rsp
->hdr
.SessionId
;
601 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
602 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
606 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
607 * but at least the raw NTLMSSP case works.
610 * No tcon so can't do
611 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
616 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
618 free_rsp_buf(resp_buftype
, rsp
);
620 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
621 if ((phase
== NtLmChallenge
) && (rc
== 0))
622 goto ssetup_ntlmssp_authenticate
;
627 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
629 struct smb2_logoff_req
*req
; /* response is also trivial struct */
631 struct TCP_Server_Info
*server
;
633 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
635 if (ses
&& (ses
->server
))
636 server
= ses
->server
;
640 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
644 /* since no tcon, smb2_init can not do this, so do here */
645 req
->hdr
.SessionId
= ses
->Suid
;
647 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
649 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
651 * No tcon so can't do
652 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
657 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
659 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
662 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
665 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
666 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
668 struct smb2_tree_connect_req
*req
;
669 struct smb2_tree_connect_rsp
*rsp
= NULL
;
674 struct TCP_Server_Info
*server
;
675 __le16
*unc_path
= NULL
;
677 cifs_dbg(FYI
, "TCON\n");
679 if ((ses
->server
) && tree
)
680 server
= ses
->server
;
684 if (tcon
&& tcon
->bad_network_name
)
687 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
688 if (unc_path
== NULL
)
691 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
693 if (unc_path_len
< 2) {
698 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
705 /* since no tcon, smb2_init can not do this, so do here */
706 req
->hdr
.SessionId
= ses
->Suid
;
707 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
708 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
711 iov
[0].iov_base
= (char *)req
;
712 /* 4 for rfc1002 length field and 1 for pad */
713 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
715 /* Testing shows that buffer offset must be at location of Buffer[0] */
716 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
717 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
718 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
719 iov
[1].iov_base
= unc_path
;
720 iov
[1].iov_len
= unc_path_len
;
722 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
724 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
725 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
729 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
730 tcon
->need_reconnect
= true;
732 goto tcon_error_exit
;
736 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
740 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
741 cifs_dbg(FYI
, "connection to disk share\n");
742 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
744 cifs_dbg(FYI
, "connection to pipe share\n");
745 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
747 cifs_dbg(FYI
, "connection to printer\n");
749 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
751 goto tcon_error_exit
;
754 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
755 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
756 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
757 tcon
->tidStatus
= CifsGood
;
758 tcon
->need_reconnect
= false;
759 tcon
->tid
= rsp
->hdr
.TreeId
;
760 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
762 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
763 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
764 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
767 free_rsp_buf(resp_buftype
, rsp
);
772 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
773 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
774 tcon
->bad_network_name
= true;
780 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
782 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
784 struct TCP_Server_Info
*server
;
785 struct cifs_ses
*ses
= tcon
->ses
;
787 cifs_dbg(FYI
, "Tree Disconnect\n");
789 if (ses
&& (ses
->server
))
790 server
= ses
->server
;
794 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
797 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
801 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
803 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
808 static struct create_lease
*
809 create_lease_buf(u8
*lease_key
, u8 oplock
)
811 struct create_lease
*buf
;
813 buf
= kzalloc(sizeof(struct create_lease
), GFP_KERNEL
);
817 buf
->lcontext
.LeaseKeyLow
= cpu_to_le64(*((u64
*)lease_key
));
818 buf
->lcontext
.LeaseKeyHigh
= cpu_to_le64(*((u64
*)(lease_key
+ 8)));
819 if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
)
820 buf
->lcontext
.LeaseState
= SMB2_LEASE_WRITE_CACHING
|
821 SMB2_LEASE_READ_CACHING
;
822 else if (oplock
== SMB2_OPLOCK_LEVEL_II
)
823 buf
->lcontext
.LeaseState
= SMB2_LEASE_READ_CACHING
;
824 else if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
)
825 buf
->lcontext
.LeaseState
= SMB2_LEASE_HANDLE_CACHING
|
826 SMB2_LEASE_READ_CACHING
|
827 SMB2_LEASE_WRITE_CACHING
;
829 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
830 (struct create_lease
, lcontext
));
831 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context
));
832 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
833 (struct create_lease
, Name
));
834 buf
->ccontext
.NameLength
= cpu_to_le16(4);
843 parse_lease_state(struct smb2_create_rsp
*rsp
)
846 struct create_lease
*lc
;
849 data_offset
= (char *)rsp
;
850 data_offset
+= 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
851 lc
= (struct create_lease
*)data_offset
;
853 char *name
= le16_to_cpu(lc
->ccontext
.NameOffset
) + (char *)lc
;
854 if (le16_to_cpu(lc
->ccontext
.NameLength
) != 4 ||
855 strncmp(name
, "RqLs", 4)) {
856 lc
= (struct create_lease
*)((char *)lc
857 + le32_to_cpu(lc
->ccontext
.Next
));
860 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS
)
861 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
864 } while (le32_to_cpu(lc
->ccontext
.Next
) != 0);
869 return smb2_map_lease_to_oplock(lc
->lcontext
.LeaseState
);
873 SMB2_open(const unsigned int xid
, struct cifs_tcon
*tcon
, __le16
*path
,
874 u64
*persistent_fid
, u64
*volatile_fid
, __u32 desired_access
,
875 __u32 create_disposition
, __u32 file_attributes
, __u32 create_options
,
876 __u8
*oplock
, struct smb2_file_all_info
*buf
)
878 struct smb2_create_req
*req
;
879 struct smb2_create_rsp
*rsp
;
880 struct TCP_Server_Info
*server
;
881 struct cifs_ses
*ses
= tcon
->ses
;
885 __le16
*copy_path
= NULL
;
890 cifs_dbg(FYI
, "create/open\n");
892 if (ses
&& (ses
->server
))
893 server
= ses
->server
;
897 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
901 req
->ImpersonationLevel
= IL_IMPERSONATION
;
902 req
->DesiredAccess
= cpu_to_le32(desired_access
);
903 /* File attributes ignored on open (used in create though) */
904 req
->FileAttributes
= cpu_to_le32(file_attributes
);
905 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
906 req
->CreateDisposition
= cpu_to_le32(create_disposition
);
907 req
->CreateOptions
= cpu_to_le32(create_options
);
908 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
909 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
)
910 - 8 /* pad */ - 4 /* do not count rfc1001 len field */);
912 iov
[0].iov_base
= (char *)req
;
913 /* 4 for rfc1002 length field */
914 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
916 /* MUST set path len (NameLength) to 0 opening root of share */
917 if (uni_path_len
>= 4) {
918 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
919 /* -1 since last byte is buf[0] which is sent below (path) */
921 if (uni_path_len
% 8 != 0) {
922 copy_size
= uni_path_len
/ 8 * 8;
923 if (copy_size
< uni_path_len
)
926 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
929 memcpy((char *)copy_path
, (const char *)path
,
931 uni_path_len
= copy_size
;
935 iov
[1].iov_len
= uni_path_len
;
936 iov
[1].iov_base
= path
;
938 * -1 since last byte is buf[0] which was counted in
941 inc_rfc1001_len(req
, uni_path_len
- 1);
944 req
->hdr
.smb2_buf_length
= cpu_to_be32(be32_to_cpu(
945 req
->hdr
.smb2_buf_length
) + 8 - 1);
950 if (!server
->oplocks
)
951 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
953 if (!(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
954 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
955 req
->RequestedOplockLevel
= *oplock
;
957 iov
[num_iovecs
].iov_base
= create_lease_buf(oplock
+1, *oplock
);
958 if (iov
[num_iovecs
].iov_base
== NULL
) {
959 cifs_small_buf_release(req
);
963 iov
[num_iovecs
].iov_len
= sizeof(struct create_lease
);
964 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
965 req
->CreateContextsOffset
= cpu_to_le32(
966 sizeof(struct smb2_create_req
) - 4 - 8 +
967 iov
[num_iovecs
-1].iov_len
);
968 req
->CreateContextsLength
= cpu_to_le32(
969 sizeof(struct create_lease
));
970 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_lease
));
974 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
975 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
978 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
982 *persistent_fid
= rsp
->PersistentFileId
;
983 *volatile_fid
= rsp
->VolatileFileId
;
986 memcpy(buf
, &rsp
->CreationTime
, 32);
987 buf
->AllocationSize
= rsp
->AllocationSize
;
988 buf
->EndOfFile
= rsp
->EndofFile
;
989 buf
->Attributes
= rsp
->FileAttributes
;
990 buf
->NumberOfLinks
= cpu_to_le32(1);
991 buf
->DeletePending
= 0;
994 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
995 *oplock
= parse_lease_state(rsp
);
997 *oplock
= rsp
->OplockLevel
;
1000 free_rsp_buf(resp_buftype
, rsp
);
1005 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1008 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1009 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, char *in_data
,
1010 u32 indatalen
, char **out_data
, u32
*plen
/* returned data len */)
1012 struct smb2_ioctl_req
*req
;
1013 struct smb2_ioctl_rsp
*rsp
;
1014 struct TCP_Server_Info
*server
;
1015 struct cifs_ses
*ses
= tcon
->ses
;
1021 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1023 /* zero out returned data len, in case of error */
1027 if (ses
&& (ses
->server
))
1028 server
= ses
->server
;
1032 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1036 req
->CtlCode
= cpu_to_le32(opcode
);
1037 req
->PersistentFileId
= persistent_fid
;
1038 req
->VolatileFileId
= volatile_fid
;
1041 req
->InputCount
= cpu_to_le32(indatalen
);
1042 /* do not set InputOffset if no input data */
1044 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1045 iov
[1].iov_base
= in_data
;
1046 iov
[1].iov_len
= indatalen
;
1051 req
->OutputOffset
= 0;
1052 req
->OutputCount
= 0; /* MBZ */
1055 * Could increase MaxOutputResponse, but that would require more
1056 * than one credit. Windows typically sets this smaller, but for some
1057 * ioctls it may be useful to allow server to send more. No point
1058 * limiting what the server can send as long as fits in one credit
1060 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1063 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1067 iov
[0].iov_base
= (char *)req
;
1068 /* 4 for rfc1002 length field */
1069 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1072 inc_rfc1001_len(req
, indatalen
);
1074 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1075 rsp
= (struct smb2_ioctl_rsp
*)iov
[0].iov_base
;
1079 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1083 /* check if caller wants to look at return data or just return rc */
1084 if ((plen
== NULL
) || (out_data
== NULL
))
1087 *plen
= le32_to_cpu(rsp
->OutputCount
);
1089 /* We check for obvious errors in the output buffer length and offset */
1091 goto ioctl_exit
; /* server returned no data */
1092 else if (*plen
> 0xFF00) {
1093 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1099 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1100 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1101 le32_to_cpu(rsp
->OutputOffset
));
1107 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1108 if (*out_data
== NULL
) {
1113 memcpy(*out_data
, rsp
->hdr
.ProtocolId
+ le32_to_cpu(rsp
->OutputOffset
),
1116 free_rsp_buf(resp_buftype
, rsp
);
1121 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1122 u64 persistent_fid
, u64 volatile_fid
)
1124 struct smb2_close_req
*req
;
1125 struct smb2_close_rsp
*rsp
;
1126 struct TCP_Server_Info
*server
;
1127 struct cifs_ses
*ses
= tcon
->ses
;
1132 cifs_dbg(FYI
, "Close\n");
1134 if (ses
&& (ses
->server
))
1135 server
= ses
->server
;
1139 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1143 req
->PersistentFileId
= persistent_fid
;
1144 req
->VolatileFileId
= volatile_fid
;
1146 iov
[0].iov_base
= (char *)req
;
1147 /* 4 for rfc1002 length field */
1148 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1150 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1151 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1155 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1159 /* BB FIXME - decode close response, update inode for caching */
1162 free_rsp_buf(resp_buftype
, rsp
);
1167 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1168 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1171 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1172 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1173 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1174 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1177 if (buffer_length
< min_buf_size
) {
1178 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1179 buffer_length
, min_buf_size
);
1183 /* check if beyond RFC1001 maximum length */
1184 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1185 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1186 buffer_length
, smb_len
);
1190 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1191 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1199 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1200 * Caller must free buffer.
1203 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1204 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1208 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1214 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1218 memcpy(data
, begin_of_buf
, buffer_length
);
1224 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1225 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1226 size_t output_len
, size_t min_len
, void *data
)
1228 struct smb2_query_info_req
*req
;
1229 struct smb2_query_info_rsp
*rsp
= NULL
;
1233 struct TCP_Server_Info
*server
;
1234 struct cifs_ses
*ses
= tcon
->ses
;
1236 cifs_dbg(FYI
, "Query Info\n");
1238 if (ses
&& (ses
->server
))
1239 server
= ses
->server
;
1243 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1247 req
->InfoType
= SMB2_O_INFO_FILE
;
1248 req
->FileInfoClass
= info_class
;
1249 req
->PersistentFileId
= persistent_fid
;
1250 req
->VolatileFileId
= volatile_fid
;
1251 /* 4 for rfc1002 length field and 1 for Buffer */
1252 req
->InputBufferOffset
=
1253 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1254 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1256 iov
[0].iov_base
= (char *)req
;
1257 /* 4 for rfc1002 length field */
1258 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1260 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1261 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1264 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1268 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1269 le32_to_cpu(rsp
->OutputBufferLength
),
1270 &rsp
->hdr
, min_len
, data
);
1273 free_rsp_buf(resp_buftype
, rsp
);
1278 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1279 u64 persistent_fid
, u64 volatile_fid
,
1280 struct smb2_file_all_info
*data
)
1282 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1283 FILE_ALL_INFORMATION
,
1284 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1285 sizeof(struct smb2_file_all_info
), data
);
1289 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1290 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1292 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1293 FILE_INTERNAL_INFORMATION
,
1294 sizeof(struct smb2_file_internal_info
),
1295 sizeof(struct smb2_file_internal_info
), uniqueid
);
1299 * This is a no-op for now. We're not really interested in the reply, but
1300 * rather in the fact that the server sent one and that server->lstrp
1303 * FIXME: maybe we should consider checking that the reply matches request?
1306 smb2_echo_callback(struct mid_q_entry
*mid
)
1308 struct TCP_Server_Info
*server
= mid
->callback_data
;
1309 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1310 unsigned int credits_received
= 1;
1312 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1313 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1315 DeleteMidQEntry(mid
);
1316 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1320 SMB2_echo(struct TCP_Server_Info
*server
)
1322 struct smb2_echo_req
*req
;
1325 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1328 cifs_dbg(FYI
, "In echo request\n");
1330 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1334 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1336 iov
.iov_base
= (char *)req
;
1337 /* 4 for rfc1002 length field */
1338 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1340 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1343 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
1345 cifs_small_buf_release(req
);
1350 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1353 struct smb2_flush_req
*req
;
1354 struct TCP_Server_Info
*server
;
1355 struct cifs_ses
*ses
= tcon
->ses
;
1360 cifs_dbg(FYI
, "Flush\n");
1362 if (ses
&& (ses
->server
))
1363 server
= ses
->server
;
1367 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1371 req
->PersistentFileId
= persistent_fid
;
1372 req
->VolatileFileId
= volatile_fid
;
1374 iov
[0].iov_base
= (char *)req
;
1375 /* 4 for rfc1002 length field */
1376 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1378 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1380 if ((rc
!= 0) && tcon
)
1381 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1383 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1388 * To form a chain of read requests, any read requests after the first should
1389 * have the end_of_chain boolean set to true.
1392 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1393 unsigned int remaining_bytes
, int request_type
)
1396 struct smb2_read_req
*req
= NULL
;
1398 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1401 if (io_parms
->tcon
->ses
->server
== NULL
)
1402 return -ECONNABORTED
;
1404 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1406 req
->PersistentFileId
= io_parms
->persistent_fid
;
1407 req
->VolatileFileId
= io_parms
->volatile_fid
;
1408 req
->ReadChannelInfoOffset
= 0; /* reserved */
1409 req
->ReadChannelInfoLength
= 0; /* reserved */
1410 req
->Channel
= 0; /* reserved */
1411 req
->MinimumCount
= 0;
1412 req
->Length
= cpu_to_le32(io_parms
->length
);
1413 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1415 if (request_type
& CHAINED_REQUEST
) {
1416 if (!(request_type
& END_OF_CHAIN
)) {
1417 /* 4 for rfc1002 length field */
1418 req
->hdr
.NextCommand
=
1419 cpu_to_le32(get_rfc1002_length(req
) + 4);
1420 } else /* END_OF_CHAIN */
1421 req
->hdr
.NextCommand
= 0;
1422 if (request_type
& RELATED_REQUEST
) {
1423 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1425 * Related requests use info from previous read request
1428 req
->hdr
.SessionId
= 0xFFFFFFFF;
1429 req
->hdr
.TreeId
= 0xFFFFFFFF;
1430 req
->PersistentFileId
= 0xFFFFFFFF;
1431 req
->VolatileFileId
= 0xFFFFFFFF;
1434 if (remaining_bytes
> io_parms
->length
)
1435 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1437 req
->RemainingBytes
= 0;
1439 iov
[0].iov_base
= (char *)req
;
1440 /* 4 for rfc1002 length field */
1441 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1446 smb2_readv_callback(struct mid_q_entry
*mid
)
1448 struct cifs_readdata
*rdata
= mid
->callback_data
;
1449 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1450 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1451 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1452 unsigned int credits_received
= 1;
1453 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1455 .rq_pages
= rdata
->pages
,
1456 .rq_npages
= rdata
->nr_pages
,
1457 .rq_pagesz
= rdata
->pagesz
,
1458 .rq_tailsz
= rdata
->tailsz
};
1460 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1461 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
1464 switch (mid
->mid_state
) {
1465 case MID_RESPONSE_RECEIVED
:
1466 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1467 /* result already set, check signature */
1471 rc
= smb2_verify_signature(&rqst
, server
);
1473 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
1476 /* FIXME: should this be counted toward the initiating task? */
1477 task_io_account_read(rdata
->bytes
);
1478 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1480 case MID_REQUEST_SUBMITTED
:
1481 case MID_RETRY_NEEDED
:
1482 rdata
->result
= -EAGAIN
;
1485 if (rdata
->result
!= -ENODATA
)
1486 rdata
->result
= -EIO
;
1490 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1492 queue_work(cifsiod_wq
, &rdata
->work
);
1493 DeleteMidQEntry(mid
);
1494 add_credits(server
, credits_received
, 0);
1497 /* smb2_async_readv - send an async write, and set up mid to handle result */
1499 smb2_async_readv(struct cifs_readdata
*rdata
)
1502 struct smb2_hdr
*buf
;
1503 struct cifs_io_parms io_parms
;
1504 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1507 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
1508 __func__
, rdata
->offset
, rdata
->bytes
);
1510 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1511 io_parms
.offset
= rdata
->offset
;
1512 io_parms
.length
= rdata
->bytes
;
1513 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1514 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1515 io_parms
.pid
= rdata
->pid
;
1516 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1520 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1521 /* 4 for rfc1002 length field */
1522 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1524 kref_get(&rdata
->refcount
);
1525 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1526 cifs_readv_receive
, smb2_readv_callback
,
1529 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1530 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1533 cifs_small_buf_release(buf
);
1538 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1539 unsigned int *nbytes
, char **buf
, int *buf_type
)
1541 int resp_buftype
, rc
= -EACCES
;
1542 struct smb2_read_rsp
*rsp
= NULL
;
1546 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1550 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1551 &resp_buftype
, CIFS_LOG_ERROR
);
1553 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1555 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1556 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1561 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1562 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
1564 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1565 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1566 (*nbytes
> io_parms
->length
)) {
1567 cifs_dbg(FYI
, "bad length %d for count %d\n",
1568 *nbytes
, io_parms
->length
);
1575 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1577 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1578 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1579 *buf
= iov
[0].iov_base
;
1580 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1581 *buf_type
= CIFS_SMALL_BUFFER
;
1582 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1583 *buf_type
= CIFS_LARGE_BUFFER
;
1589 * Check the mid_state and signature on received buffer (if any), and queue the
1590 * workqueue completion task.
1593 smb2_writev_callback(struct mid_q_entry
*mid
)
1595 struct cifs_writedata
*wdata
= mid
->callback_data
;
1596 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1597 unsigned int written
;
1598 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1599 unsigned int credits_received
= 1;
1601 switch (mid
->mid_state
) {
1602 case MID_RESPONSE_RECEIVED
:
1603 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1604 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1605 if (wdata
->result
!= 0)
1608 written
= le32_to_cpu(rsp
->DataLength
);
1610 * Mask off high 16 bits when bytes written as returned
1611 * by the server is greater than bytes requested by the
1612 * client. OS/2 servers are known to set incorrect
1615 if (written
> wdata
->bytes
)
1618 if (written
< wdata
->bytes
)
1619 wdata
->result
= -ENOSPC
;
1621 wdata
->bytes
= written
;
1623 case MID_REQUEST_SUBMITTED
:
1624 case MID_RETRY_NEEDED
:
1625 wdata
->result
= -EAGAIN
;
1628 wdata
->result
= -EIO
;
1633 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1635 queue_work(cifsiod_wq
, &wdata
->work
);
1636 DeleteMidQEntry(mid
);
1637 add_credits(tcon
->ses
->server
, credits_received
, 0);
1640 /* smb2_async_writev - send an async write, and set up mid to handle result */
1642 smb2_async_writev(struct cifs_writedata
*wdata
)
1645 struct smb2_write_req
*req
= NULL
;
1646 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1648 struct smb_rqst rqst
;
1650 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1652 goto async_writev_out
;
1654 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1656 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1657 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1658 req
->WriteChannelInfoOffset
= 0;
1659 req
->WriteChannelInfoLength
= 0;
1661 req
->Offset
= cpu_to_le64(wdata
->offset
);
1662 /* 4 for rfc1002 length field */
1663 req
->DataOffset
= cpu_to_le16(
1664 offsetof(struct smb2_write_req
, Buffer
) - 4);
1665 req
->RemainingBytes
= 0;
1667 /* 4 for rfc1002 length field and 1 for Buffer */
1668 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1673 rqst
.rq_pages
= wdata
->pages
;
1674 rqst
.rq_npages
= wdata
->nr_pages
;
1675 rqst
.rq_pagesz
= wdata
->pagesz
;
1676 rqst
.rq_tailsz
= wdata
->tailsz
;
1678 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
1679 wdata
->offset
, wdata
->bytes
);
1681 req
->Length
= cpu_to_le32(wdata
->bytes
);
1683 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1685 kref_get(&wdata
->refcount
);
1686 rc
= cifs_call_async(tcon
->ses
->server
, &rqst
, NULL
,
1687 smb2_writev_callback
, wdata
, 0);
1690 kref_put(&wdata
->refcount
, cifs_writedata_release
);
1691 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1695 cifs_small_buf_release(req
);
1700 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1701 * The length field from io_parms must be at least 1 and indicates a number of
1702 * elements with data to write that begins with position 1 in iov array. All
1703 * data length is specified by count.
1706 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1707 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1710 struct smb2_write_req
*req
= NULL
;
1711 struct smb2_write_rsp
*rsp
= NULL
;
1718 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1722 if (io_parms
->tcon
->ses
->server
== NULL
)
1723 return -ECONNABORTED
;
1725 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1727 req
->PersistentFileId
= io_parms
->persistent_fid
;
1728 req
->VolatileFileId
= io_parms
->volatile_fid
;
1729 req
->WriteChannelInfoOffset
= 0;
1730 req
->WriteChannelInfoLength
= 0;
1732 req
->Length
= cpu_to_le32(io_parms
->length
);
1733 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1734 /* 4 for rfc1002 length field */
1735 req
->DataOffset
= cpu_to_le16(
1736 offsetof(struct smb2_write_req
, Buffer
) - 4);
1737 req
->RemainingBytes
= 0;
1739 iov
[0].iov_base
= (char *)req
;
1740 /* 4 for rfc1002 length field and 1 for Buffer */
1741 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1743 /* length of entire message including data to be written */
1744 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1746 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
1748 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
1751 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
1752 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
1754 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1756 free_rsp_buf(resp_buftype
, rsp
);
1761 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
1764 unsigned int entrycount
= 0;
1765 unsigned int next_offset
= 0;
1766 FILE_DIRECTORY_INFO
*entryptr
;
1768 if (bufstart
== NULL
)
1771 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
1774 entryptr
= (FILE_DIRECTORY_INFO
*)
1775 ((char *)entryptr
+ next_offset
);
1777 if ((char *)entryptr
+ size
> end_of_buf
) {
1778 cifs_dbg(VFS
, "malformed search entry would overflow\n");
1782 len
= le32_to_cpu(entryptr
->FileNameLength
);
1783 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
1784 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
1789 *lastentry
= (char *)entryptr
;
1792 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
1804 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
1805 u64 persistent_fid
, u64 volatile_fid
, int index
,
1806 struct cifs_search_info
*srch_inf
)
1808 struct smb2_query_directory_req
*req
;
1809 struct smb2_query_directory_rsp
*rsp
= NULL
;
1814 unsigned char *bufptr
;
1815 struct TCP_Server_Info
*server
;
1816 struct cifs_ses
*ses
= tcon
->ses
;
1817 __le16 asteriks
= cpu_to_le16('*');
1819 unsigned int output_size
= CIFSMaxBufSize
;
1820 size_t info_buf_size
;
1822 if (ses
&& (ses
->server
))
1823 server
= ses
->server
;
1827 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
1831 switch (srch_inf
->info_level
) {
1832 case SMB_FIND_FILE_DIRECTORY_INFO
:
1833 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
1834 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
1836 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
1837 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
1838 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
1841 cifs_dbg(VFS
, "info level %u isn't supported\n",
1842 srch_inf
->info_level
);
1847 req
->FileIndex
= cpu_to_le32(index
);
1848 req
->PersistentFileId
= persistent_fid
;
1849 req
->VolatileFileId
= volatile_fid
;
1852 bufptr
= req
->Buffer
;
1853 memcpy(bufptr
, &asteriks
, len
);
1855 req
->FileNameOffset
=
1856 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
1857 req
->FileNameLength
= cpu_to_le16(len
);
1859 * BB could be 30 bytes or so longer if we used SMB2 specific
1860 * buffer lengths, but this is safe and close enough.
1862 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
1863 output_size
= min_t(unsigned int, output_size
, 2 << 15);
1864 req
->OutputBufferLength
= cpu_to_le32(output_size
);
1866 iov
[0].iov_base
= (char *)req
;
1867 /* 4 for RFC1001 length and 1 for Buffer */
1868 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1870 iov
[1].iov_base
= (char *)(req
->Buffer
);
1871 iov
[1].iov_len
= len
;
1873 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
1875 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
1876 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
1879 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
1883 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1884 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
1889 srch_inf
->unicode
= true;
1891 if (srch_inf
->ntwrk_buf_start
) {
1892 if (srch_inf
->smallBuf
)
1893 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
1895 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
1897 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
1898 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
1899 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
1900 /* 4 for rfc1002 length field */
1901 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
1902 srch_inf
->entries_in_buffer
=
1903 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
1904 &srch_inf
->last_entry
, info_buf_size
);
1905 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
1906 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
1907 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
1908 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
1909 if (resp_buftype
== CIFS_LARGE_BUFFER
)
1910 srch_inf
->smallBuf
= false;
1911 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
1912 srch_inf
->smallBuf
= true;
1914 cifs_dbg(VFS
, "illegal search buffer type\n");
1916 if (rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
)
1917 srch_inf
->endOfSearch
= 1;
1919 srch_inf
->endOfSearch
= 0;
1924 free_rsp_buf(resp_buftype
, rsp
);
1929 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1930 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
1931 unsigned int num
, void **data
, unsigned int *size
)
1933 struct smb2_set_info_req
*req
;
1934 struct smb2_set_info_rsp
*rsp
= NULL
;
1939 struct TCP_Server_Info
*server
;
1940 struct cifs_ses
*ses
= tcon
->ses
;
1942 if (ses
&& (ses
->server
))
1943 server
= ses
->server
;
1950 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
1954 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
1960 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
1962 req
->InfoType
= SMB2_O_INFO_FILE
;
1963 req
->FileInfoClass
= info_class
;
1964 req
->PersistentFileId
= persistent_fid
;
1965 req
->VolatileFileId
= volatile_fid
;
1967 /* 4 for RFC1001 length and 1 for Buffer */
1969 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
1970 req
->BufferLength
= cpu_to_le32(*size
);
1972 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
1974 memcpy(req
->Buffer
, *data
, *size
);
1976 iov
[0].iov_base
= (char *)req
;
1977 /* 4 for RFC1001 length */
1978 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1980 for (i
= 1; i
< num
; i
++) {
1981 inc_rfc1001_len(req
, size
[i
]);
1982 le32_add_cpu(&req
->BufferLength
, size
[i
]);
1983 iov
[i
].iov_base
= (char *)data
[i
];
1984 iov
[i
].iov_len
= size
[i
];
1987 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
1988 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
1991 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
1995 free_rsp_buf(resp_buftype
, rsp
);
2001 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
2002 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2004 struct smb2_file_rename_info info
;
2006 unsigned int size
[2];
2008 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2010 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2014 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
2015 /* 0 = fail if target already exists */
2016 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2017 info
.FileNameLength
= cpu_to_le32(len
);
2020 size
[0] = sizeof(struct smb2_file_rename_info
);
2022 data
[1] = target_file
;
2023 size
[1] = len
+ 2 /* null */;
2025 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2026 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2033 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2034 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2036 struct smb2_file_link_info info
;
2038 unsigned int size
[2];
2040 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2042 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2046 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2047 /* 0 = fail if link already exists */
2048 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2049 info
.FileNameLength
= cpu_to_le32(len
);
2052 size
[0] = sizeof(struct smb2_file_link_info
);
2054 data
[1] = target_file
;
2055 size
[1] = len
+ 2 /* null */;
2057 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2058 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2064 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2065 u64 volatile_fid
, u32 pid
, __le64
*eof
)
2067 struct smb2_file_eof_info info
;
2071 info
.EndOfFile
= *eof
;
2074 size
= sizeof(struct smb2_file_eof_info
);
2076 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
2077 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2081 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2082 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2085 size
= sizeof(FILE_BASIC_INFO
);
2086 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2087 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2088 (void **)&buf
, &size
);
2092 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2093 const u64 persistent_fid
, const u64 volatile_fid
,
2097 struct smb2_oplock_break
*req
= NULL
;
2099 cifs_dbg(FYI
, "SMB2_oplock_break\n");
2100 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2105 req
->VolatileFid
= volatile_fid
;
2106 req
->PersistentFid
= persistent_fid
;
2107 req
->OplockLevel
= oplock_level
;
2108 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2110 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2111 /* SMB2 buffer freed by function above */
2114 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2115 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
2122 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2123 struct kstatfs
*kst
)
2125 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2126 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2127 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2128 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2129 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2134 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2135 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2138 struct smb2_query_info_req
*req
;
2140 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2142 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2145 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2149 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2150 req
->FileInfoClass
= level
;
2151 req
->PersistentFileId
= persistent_fid
;
2152 req
->VolatileFileId
= volatile_fid
;
2153 /* 4 for rfc1002 length field and 1 for pad */
2154 req
->InputBufferOffset
=
2155 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2156 req
->OutputBufferLength
= cpu_to_le32(
2157 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2159 iov
->iov_base
= (char *)req
;
2160 /* 4 for rfc1002 length field */
2161 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2166 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2167 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2169 struct smb2_query_info_rsp
*rsp
= NULL
;
2173 struct cifs_ses
*ses
= tcon
->ses
;
2174 struct smb2_fs_full_size_info
*info
= NULL
;
2176 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2177 sizeof(struct smb2_fs_full_size_info
),
2178 persistent_fid
, volatile_fid
);
2182 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2184 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2187 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2189 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2190 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2191 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2192 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2193 sizeof(struct smb2_fs_full_size_info
));
2195 copy_fs_info_to_kstatfs(info
, fsdata
);
2198 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2203 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2204 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2205 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2208 struct smb2_lock_req
*req
= NULL
;
2213 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2215 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2219 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2220 req
->LockCount
= cpu_to_le16(num_lock
);
2222 req
->PersistentFileId
= persist_fid
;
2223 req
->VolatileFileId
= volatile_fid
;
2225 count
= num_lock
* sizeof(struct smb2_lock_element
);
2226 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2228 iov
[0].iov_base
= (char *)req
;
2229 /* 4 for rfc1002 length field and count for all locks */
2230 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2231 iov
[1].iov_base
= (char *)buf
;
2232 iov
[1].iov_len
= count
;
2234 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2235 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2237 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2238 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2245 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2246 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2247 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2250 struct smb2_lock_element lock
;
2252 lock
.Offset
= cpu_to_le64(offset
);
2253 lock
.Length
= cpu_to_le64(length
);
2254 lock
.Flags
= cpu_to_le32(lock_flags
);
2255 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2256 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2258 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2262 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2263 __u8
*lease_key
, const __le32 lease_state
)
2266 struct smb2_lease_ack
*req
= NULL
;
2268 cifs_dbg(FYI
, "SMB2_lease_break\n");
2269 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2274 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2275 req
->StructureSize
= cpu_to_le16(36);
2276 inc_rfc1001_len(req
, 12);
2278 memcpy(req
->LeaseKey
, lease_key
, 16);
2279 req
->LeaseState
= lease_state
;
2281 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2282 /* SMB2 buffer freed by function above */
2285 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2286 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);