4 * Copyright (C) International Business Machines Corp., 2009, 2013
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
9 * Contains the routines for constructing the SMB2 PDUs themselves
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
32 #include <linux/kernel.h>
33 #include <linux/vfs.h>
34 #include <linux/task_io_accounting_ops.h>
35 #include <linux/uaccess.h>
36 #include <linux/pagemap.h>
37 #include <linux/xattr.h>
41 #include "cifsproto.h"
42 #include "smb2proto.h"
43 #include "cifs_unicode.h"
44 #include "cifs_debug.h"
46 #include "smb2status.h"
51 * The following table defines the expected "StructureSize" of SMB2 requests
52 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
54 * Note that commands are defined in smb2pdu.h in le16 but the array below is
55 * indexed by command in host byte order.
57 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
58 /* SMB2_NEGOTIATE */ 36,
59 /* SMB2_SESSION_SETUP */ 25,
61 /* SMB2_TREE_CONNECT */ 9,
62 /* SMB2_TREE_DISCONNECT */ 4,
72 /* SMB2_QUERY_DIRECTORY */ 33,
73 /* SMB2_CHANGE_NOTIFY */ 32,
74 /* SMB2_QUERY_INFO */ 41,
75 /* SMB2_SET_INFO */ 33,
76 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
81 smb2_hdr_assemble(struct smb2_hdr
*hdr
, __le16 smb2_cmd
/* command */ ,
82 const struct cifs_tcon
*tcon
)
84 struct smb2_pdu
*pdu
= (struct smb2_pdu
*)hdr
;
85 char *temp
= (char *)hdr
;
86 /* lookup word count ie StructureSize from table */
87 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_cmd
)];
90 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
91 * largest operations (Create)
95 /* Note this is only network field converted to big endian */
96 hdr
->smb2_buf_length
= cpu_to_be32(parmsize
+ sizeof(struct smb2_hdr
)
97 - 4 /* RFC 1001 length field itself not counted */);
99 hdr
->ProtocolId
[0] = 0xFE;
100 hdr
->ProtocolId
[1] = 'S';
101 hdr
->ProtocolId
[2] = 'M';
102 hdr
->ProtocolId
[3] = 'B';
103 hdr
->StructureSize
= cpu_to_le16(64);
104 hdr
->Command
= smb2_cmd
;
105 hdr
->CreditRequest
= cpu_to_le16(2); /* BB make this dynamic */
106 hdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
111 /* BB FIXME when we do write > 64K add +1 for every 64K in req or rsp */
112 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
113 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
115 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
116 hdr
->CreditCharge
= cpu_to_le16(1);
117 /* else CreditCharge MBZ */
119 hdr
->TreeId
= tcon
->tid
;
120 /* Uid is not converted */
122 hdr
->SessionId
= tcon
->ses
->Suid
;
125 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
126 * to pass the path on the Open SMB prefixed by \\server\share.
127 * Not sure when we would need to do the augmented path (if ever) and
128 * setting this flag breaks the SMB2 open operation since it is
129 * illegal to send an empty path name (without \\server\share prefix)
130 * when the DFS flag is set in the SMB open header. We could
131 * consider setting the flag on all operations other than open
132 * but it is safer to net set it for now.
134 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
135 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
137 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
)
138 hdr
->Flags
|= SMB2_FLAGS_SIGNED
;
140 pdu
->StructureSize2
= cpu_to_le16(parmsize
);
145 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
148 struct nls_table
*nls_codepage
;
149 struct cifs_ses
*ses
;
150 struct TCP_Server_Info
*server
;
153 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
154 * check for tcp and smb session status done differently
155 * for those three - in the calling routine.
160 if (smb2_command
== SMB2_TREE_CONNECT
)
163 if (tcon
->tidStatus
== CifsExiting
) {
165 * only tree disconnect, open, and write,
166 * (and ulogoff which does not have tcon)
167 * are allowed as we start force umount.
169 if ((smb2_command
!= SMB2_WRITE
) &&
170 (smb2_command
!= SMB2_CREATE
) &&
171 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
172 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
177 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
178 (!tcon
->ses
->server
))
182 server
= ses
->server
;
185 * Give demultiplex thread up to 10 seconds to reconnect, should be
186 * greater than cifs socket timeout which is 7 seconds
188 while (server
->tcpStatus
== CifsNeedReconnect
) {
190 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
191 * here since they are implicitly done when session drops.
193 switch (smb2_command
) {
195 * BB Should we keep oplock break and add flush to exceptions?
197 case SMB2_TREE_DISCONNECT
:
200 case SMB2_OPLOCK_BREAK
:
204 wait_event_interruptible_timeout(server
->response_q
,
205 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
207 /* are we still trying to reconnect? */
208 if (server
->tcpStatus
!= CifsNeedReconnect
)
212 * on "soft" mounts we wait once. Hard mounts keep
213 * retrying until process is killed or server comes
217 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
222 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
225 nls_codepage
= load_nls_default();
228 * need to prevent multiple threads trying to simultaneously reconnect
229 * the same SMB session
231 mutex_lock(&tcon
->ses
->session_mutex
);
232 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
233 if (!rc
&& tcon
->ses
->need_reconnect
)
234 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
236 if (rc
|| !tcon
->need_reconnect
) {
237 mutex_unlock(&tcon
->ses
->session_mutex
);
241 cifs_mark_open_files_invalid(tcon
);
242 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
243 mutex_unlock(&tcon
->ses
->session_mutex
);
244 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
247 atomic_inc(&tconInfoReconnectCount
);
249 * BB FIXME add code to check if wsize needs update due to negotiated
250 * smb buffer size shrinking.
254 * Check if handle based operation so we know whether we can continue
255 * or not without returning to caller to reset file handle.
258 * BB Is flush done by server on drop of tcp session? Should we special
259 * case it and skip above?
261 switch (smb2_command
) {
267 case SMB2_QUERY_DIRECTORY
:
268 case SMB2_CHANGE_NOTIFY
:
269 case SMB2_QUERY_INFO
:
273 unload_nls(nls_codepage
);
278 * Allocate and return pointer to an SMB request hdr, and set basic
279 * SMB information in the SMB header. If the return code is zero, this
280 * function must have filled in request_buf pointer.
283 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
288 rc
= smb2_reconnect(smb2_command
, tcon
);
292 /* BB eventually switch this to SMB2 specific small buf size */
293 *request_buf
= cifs_small_buf_get();
294 if (*request_buf
== NULL
) {
295 /* BB should we add a retry in here if not a writepage? */
299 smb2_hdr_assemble((struct smb2_hdr
*) *request_buf
, smb2_command
, tcon
);
302 #ifdef CONFIG_CIFS_STATS2
303 uint16_t com_code
= le16_to_cpu(smb2_command
);
304 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
306 cifs_stats_inc(&tcon
->num_smbs_sent
);
313 free_rsp_buf(int resp_buftype
, void *rsp
)
315 if (resp_buftype
== CIFS_SMALL_BUFFER
)
316 cifs_small_buf_release(rsp
);
317 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
318 cifs_buf_release(rsp
);
324 * SMB2 Worker functions follow:
326 * The general structure of the worker functions is:
327 * 1) Call smb2_init (assembles SMB2 header)
328 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
329 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
330 * 4) Decode SMB2 command specific fields in the fixed length area
331 * 5) Decode variable length data area (if any for this SMB2 command type)
332 * 6) Call free smb buffer
338 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
340 struct smb2_negotiate_req
*req
;
341 struct smb2_negotiate_rsp
*rsp
;
345 struct TCP_Server_Info
*server
= ses
->server
;
346 int blob_offset
, blob_length
;
348 int flags
= CIFS_NEG_OP
;
350 cifs_dbg(FYI
, "Negotiate protocol\n");
353 WARN(1, "%s: server is NULL!\n", __func__
);
357 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
361 req
->hdr
.SessionId
= 0;
363 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
365 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
366 inc_rfc1001_len(req
, 2);
368 /* only one of SMB2 signing flags may be set in SMB2 request */
370 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
371 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
372 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
374 req
->SecurityMode
= 0;
376 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
378 memcpy(req
->ClientGUID
, cifs_client_guid
, SMB2_CLIENT_GUID_SIZE
);
380 iov
[0].iov_base
= (char *)req
;
381 /* 4 for rfc1002 length field */
382 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
384 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
);
386 rsp
= (struct smb2_negotiate_rsp
*)iov
[0].iov_base
;
388 * No tcon so can't do
389 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
394 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
396 /* BB we may eventually want to match the negotiated vs. requested
397 dialect, even though we are only requesting one at a time */
398 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
399 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
400 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
401 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
402 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
403 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
404 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
405 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
407 cifs_dbg(VFS
, "Illegal dialect returned by server %d\n",
408 le16_to_cpu(rsp
->DialectRevision
));
412 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
414 /* SMB2 only has an extended negflavor */
415 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
416 server
->maxBuf
= le32_to_cpu(rsp
->MaxTransactSize
);
417 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
418 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
419 /* BB Do we need to validate the SecurityMode? */
420 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
421 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
423 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
425 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
428 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
430 * ses->sectype = RawNTLMSSP;
431 * but for time being this is our only auth choice so doesn't matter.
432 * We just found a server which sets blob length to zero expecting raw.
434 if (blob_length
== 0)
435 cifs_dbg(FYI
, "missing security blob on negprot\n");
437 rc
= cifs_enable_signing(server
, ses
->sign
);
438 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
442 rc
= decode_neg_token_init(security_blob
, blob_length
,
453 free_rsp_buf(resp_buftype
, rsp
);
458 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
459 const struct nls_table
*nls_cp
)
461 struct smb2_sess_setup_req
*req
;
462 struct smb2_sess_setup_rsp
*rsp
= NULL
;
466 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
467 struct TCP_Server_Info
*server
= ses
->server
;
470 char *ntlmssp_blob
= NULL
;
471 bool use_spnego
= false; /* else use raw ntlmssp */
473 cifs_dbg(FYI
, "Session Setup\n");
476 WARN(1, "%s: server is NULL!\n", __func__
);
481 * If memory allocation is successful, caller of this function
484 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
488 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
489 ses
->sectype
= RawNTLMSSP
;
491 ssetup_ntlmssp_authenticate
:
492 if (phase
== NtLmChallenge
)
493 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
495 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
499 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
500 req
->VcNumber
= 0; /* MBZ */
501 /* to enable echos and oplocks */
502 req
->hdr
.CreditRequest
= cpu_to_le16(3);
504 /* only one of SMB2 signing flags may be set in SMB2 request */
506 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
507 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
508 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
510 req
->SecurityMode
= 0;
512 req
->Capabilities
= 0;
513 req
->Channel
= 0; /* MBZ */
515 iov
[0].iov_base
= (char *)req
;
516 /* 4 for rfc1002 length field and 1 for pad */
517 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
518 if (phase
== NtLmNegotiate
) {
519 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
521 if (ntlmssp_blob
== NULL
) {
525 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
527 /* blob_length = build_spnego_ntlmssp_blob(
529 sizeof(struct _NEGOTIATE_MESSAGE),
531 /* BB eventually need to add this */
532 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
537 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
538 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
539 security_blob
= ntlmssp_blob
;
541 } else if (phase
== NtLmAuthenticate
) {
542 req
->hdr
.SessionId
= ses
->Suid
;
543 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
545 if (ntlmssp_blob
== NULL
) {
549 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
552 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n",
554 goto ssetup_exit
; /* BB double check error handling */
557 /* blob_length = build_spnego_ntlmssp_blob(
561 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
566 security_blob
= ntlmssp_blob
;
569 cifs_dbg(VFS
, "illegal ntlmssp phase\n");
574 /* Testing shows that buffer offset must be at location of Buffer[0] */
575 req
->SecurityBufferOffset
=
576 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
577 1 /* pad */ - 4 /* rfc1001 len */);
578 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
579 iov
[1].iov_base
= security_blob
;
580 iov
[1].iov_len
= blob_length
;
582 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
584 /* BB add code to build os and lm fields */
586 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
,
587 CIFS_LOG_ERROR
| CIFS_NEG_OP
);
589 kfree(security_blob
);
590 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
591 if (resp_buftype
!= CIFS_NO_BUFFER
&&
592 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
593 if (phase
!= NtLmNegotiate
) {
594 cifs_dbg(VFS
, "Unexpected more processing error\n");
597 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
598 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
599 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
600 le16_to_cpu(rsp
->SecurityBufferOffset
));
605 /* NTLMSSP Negotiate sent now processing challenge (response) */
606 phase
= NtLmChallenge
; /* process ntlmssp challenge */
607 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
608 ses
->Suid
= rsp
->hdr
.SessionId
;
609 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
610 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
614 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
615 * but at least the raw NTLMSSP case works.
618 * No tcon so can't do
619 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
624 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
626 free_rsp_buf(resp_buftype
, rsp
);
628 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
629 if ((phase
== NtLmChallenge
) && (rc
== 0))
630 goto ssetup_ntlmssp_authenticate
;
635 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
637 struct smb2_logoff_req
*req
; /* response is also trivial struct */
639 struct TCP_Server_Info
*server
;
641 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
643 if (ses
&& (ses
->server
))
644 server
= ses
->server
;
648 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
652 /* since no tcon, smb2_init can not do this, so do here */
653 req
->hdr
.SessionId
= ses
->Suid
;
655 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
657 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
659 * No tcon so can't do
660 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
665 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
667 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
670 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
673 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
674 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
676 struct smb2_tree_connect_req
*req
;
677 struct smb2_tree_connect_rsp
*rsp
= NULL
;
682 struct TCP_Server_Info
*server
;
683 __le16
*unc_path
= NULL
;
685 cifs_dbg(FYI
, "TCON\n");
687 if ((ses
->server
) && tree
)
688 server
= ses
->server
;
692 if (tcon
&& tcon
->bad_network_name
)
695 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
696 if (unc_path
== NULL
)
699 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
701 if (unc_path_len
< 2) {
706 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
713 /* since no tcon, smb2_init can not do this, so do here */
714 req
->hdr
.SessionId
= ses
->Suid
;
715 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
716 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
719 iov
[0].iov_base
= (char *)req
;
720 /* 4 for rfc1002 length field and 1 for pad */
721 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
723 /* Testing shows that buffer offset must be at location of Buffer[0] */
724 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
725 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
726 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
727 iov
[1].iov_base
= unc_path
;
728 iov
[1].iov_len
= unc_path_len
;
730 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
732 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
733 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
737 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
738 tcon
->need_reconnect
= true;
740 goto tcon_error_exit
;
744 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
748 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
749 cifs_dbg(FYI
, "connection to disk share\n");
750 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
752 cifs_dbg(FYI
, "connection to pipe share\n");
753 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
755 cifs_dbg(FYI
, "connection to printer\n");
757 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
759 goto tcon_error_exit
;
762 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
763 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
764 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
765 tcon
->tidStatus
= CifsGood
;
766 tcon
->need_reconnect
= false;
767 tcon
->tid
= rsp
->hdr
.TreeId
;
768 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
770 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
771 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
772 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
775 free_rsp_buf(resp_buftype
, rsp
);
780 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
781 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
782 tcon
->bad_network_name
= true;
788 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
790 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
792 struct TCP_Server_Info
*server
;
793 struct cifs_ses
*ses
= tcon
->ses
;
795 cifs_dbg(FYI
, "Tree Disconnect\n");
797 if (ses
&& (ses
->server
))
798 server
= ses
->server
;
802 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
805 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
809 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
811 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
816 static struct create_lease
*
817 create_lease_buf(u8
*lease_key
, u8 oplock
)
819 struct create_lease
*buf
;
821 buf
= kzalloc(sizeof(struct create_lease
), GFP_KERNEL
);
825 buf
->lcontext
.LeaseKeyLow
= cpu_to_le64(*((u64
*)lease_key
));
826 buf
->lcontext
.LeaseKeyHigh
= cpu_to_le64(*((u64
*)(lease_key
+ 8)));
827 if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
)
828 buf
->lcontext
.LeaseState
= SMB2_LEASE_WRITE_CACHING
|
829 SMB2_LEASE_READ_CACHING
;
830 else if (oplock
== SMB2_OPLOCK_LEVEL_II
)
831 buf
->lcontext
.LeaseState
= SMB2_LEASE_READ_CACHING
;
832 else if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
)
833 buf
->lcontext
.LeaseState
= SMB2_LEASE_HANDLE_CACHING
|
834 SMB2_LEASE_READ_CACHING
|
835 SMB2_LEASE_WRITE_CACHING
;
837 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
838 (struct create_lease
, lcontext
));
839 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context
));
840 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
841 (struct create_lease
, Name
));
842 buf
->ccontext
.NameLength
= cpu_to_le16(4);
851 parse_lease_state(struct smb2_create_rsp
*rsp
)
854 struct create_lease
*lc
;
857 data_offset
= (char *)rsp
;
858 data_offset
+= 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
859 lc
= (struct create_lease
*)data_offset
;
861 char *name
= le16_to_cpu(lc
->ccontext
.NameOffset
) + (char *)lc
;
862 if (le16_to_cpu(lc
->ccontext
.NameLength
) != 4 ||
863 strncmp(name
, "RqLs", 4)) {
864 lc
= (struct create_lease
*)((char *)lc
865 + le32_to_cpu(lc
->ccontext
.Next
));
868 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS
)
869 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
872 } while (le32_to_cpu(lc
->ccontext
.Next
) != 0);
877 return smb2_map_lease_to_oplock(lc
->lcontext
.LeaseState
);
881 SMB2_open(const unsigned int xid
, struct cifs_tcon
*tcon
, __le16
*path
,
882 u64
*persistent_fid
, u64
*volatile_fid
, __u32 desired_access
,
883 __u32 create_disposition
, __u32 file_attributes
, __u32 create_options
,
884 __u8
*oplock
, struct smb2_file_all_info
*buf
)
886 struct smb2_create_req
*req
;
887 struct smb2_create_rsp
*rsp
;
888 struct TCP_Server_Info
*server
;
889 struct cifs_ses
*ses
= tcon
->ses
;
893 __le16
*copy_path
= NULL
;
898 cifs_dbg(FYI
, "create/open\n");
900 if (ses
&& (ses
->server
))
901 server
= ses
->server
;
905 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
909 req
->ImpersonationLevel
= IL_IMPERSONATION
;
910 req
->DesiredAccess
= cpu_to_le32(desired_access
);
911 /* File attributes ignored on open (used in create though) */
912 req
->FileAttributes
= cpu_to_le32(file_attributes
);
913 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
914 req
->CreateDisposition
= cpu_to_le32(create_disposition
);
915 req
->CreateOptions
= cpu_to_le32(create_options
);
916 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
917 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
)
918 - 8 /* pad */ - 4 /* do not count rfc1001 len field */);
920 iov
[0].iov_base
= (char *)req
;
921 /* 4 for rfc1002 length field */
922 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
924 /* MUST set path len (NameLength) to 0 opening root of share */
925 if (uni_path_len
>= 4) {
926 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
927 /* -1 since last byte is buf[0] which is sent below (path) */
929 if (uni_path_len
% 8 != 0) {
930 copy_size
= uni_path_len
/ 8 * 8;
931 if (copy_size
< uni_path_len
)
934 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
937 memcpy((char *)copy_path
, (const char *)path
,
939 uni_path_len
= copy_size
;
943 iov
[1].iov_len
= uni_path_len
;
944 iov
[1].iov_base
= path
;
946 * -1 since last byte is buf[0] which was counted in
949 inc_rfc1001_len(req
, uni_path_len
- 1);
952 req
->hdr
.smb2_buf_length
= cpu_to_be32(be32_to_cpu(
953 req
->hdr
.smb2_buf_length
) + 8 - 1);
958 if (!server
->oplocks
)
959 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
961 if (!(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
962 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
963 req
->RequestedOplockLevel
= *oplock
;
965 iov
[num_iovecs
].iov_base
= create_lease_buf(oplock
+1, *oplock
);
966 if (iov
[num_iovecs
].iov_base
== NULL
) {
967 cifs_small_buf_release(req
);
971 iov
[num_iovecs
].iov_len
= sizeof(struct create_lease
);
972 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
973 req
->CreateContextsOffset
= cpu_to_le32(
974 sizeof(struct smb2_create_req
) - 4 - 8 +
975 iov
[num_iovecs
-1].iov_len
);
976 req
->CreateContextsLength
= cpu_to_le32(
977 sizeof(struct create_lease
));
978 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_lease
));
982 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
983 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
986 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
990 *persistent_fid
= rsp
->PersistentFileId
;
991 *volatile_fid
= rsp
->VolatileFileId
;
994 memcpy(buf
, &rsp
->CreationTime
, 32);
995 buf
->AllocationSize
= rsp
->AllocationSize
;
996 buf
->EndOfFile
= rsp
->EndofFile
;
997 buf
->Attributes
= rsp
->FileAttributes
;
998 buf
->NumberOfLinks
= cpu_to_le32(1);
999 buf
->DeletePending
= 0;
1002 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1003 *oplock
= parse_lease_state(rsp
);
1005 *oplock
= rsp
->OplockLevel
;
1008 free_rsp_buf(resp_buftype
, rsp
);
1013 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1016 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1017 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, char *in_data
,
1018 u32 indatalen
, char **out_data
, u32
*plen
/* returned data len */)
1020 struct smb2_ioctl_req
*req
;
1021 struct smb2_ioctl_rsp
*rsp
;
1022 struct TCP_Server_Info
*server
;
1023 struct cifs_ses
*ses
= tcon
->ses
;
1029 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1031 /* zero out returned data len, in case of error */
1035 if (ses
&& (ses
->server
))
1036 server
= ses
->server
;
1040 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1044 req
->CtlCode
= cpu_to_le32(opcode
);
1045 req
->PersistentFileId
= persistent_fid
;
1046 req
->VolatileFileId
= volatile_fid
;
1049 req
->InputCount
= cpu_to_le32(indatalen
);
1050 /* do not set InputOffset if no input data */
1052 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1053 iov
[1].iov_base
= in_data
;
1054 iov
[1].iov_len
= indatalen
;
1059 req
->OutputOffset
= 0;
1060 req
->OutputCount
= 0; /* MBZ */
1063 * Could increase MaxOutputResponse, but that would require more
1064 * than one credit. Windows typically sets this smaller, but for some
1065 * ioctls it may be useful to allow server to send more. No point
1066 * limiting what the server can send as long as fits in one credit
1068 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1071 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1075 iov
[0].iov_base
= (char *)req
;
1076 /* 4 for rfc1002 length field */
1077 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1080 inc_rfc1001_len(req
, indatalen
);
1082 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1083 rsp
= (struct smb2_ioctl_rsp
*)iov
[0].iov_base
;
1087 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1091 /* check if caller wants to look at return data or just return rc */
1092 if ((plen
== NULL
) || (out_data
== NULL
))
1095 *plen
= le32_to_cpu(rsp
->OutputCount
);
1097 /* We check for obvious errors in the output buffer length and offset */
1099 goto ioctl_exit
; /* server returned no data */
1100 else if (*plen
> 0xFF00) {
1101 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1107 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1108 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1109 le32_to_cpu(rsp
->OutputOffset
));
1115 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1116 if (*out_data
== NULL
) {
1121 memcpy(*out_data
, rsp
->hdr
.ProtocolId
+ le32_to_cpu(rsp
->OutputOffset
),
1124 free_rsp_buf(resp_buftype
, rsp
);
1129 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1130 u64 persistent_fid
, u64 volatile_fid
)
1132 struct smb2_close_req
*req
;
1133 struct smb2_close_rsp
*rsp
;
1134 struct TCP_Server_Info
*server
;
1135 struct cifs_ses
*ses
= tcon
->ses
;
1140 cifs_dbg(FYI
, "Close\n");
1142 if (ses
&& (ses
->server
))
1143 server
= ses
->server
;
1147 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1151 req
->PersistentFileId
= persistent_fid
;
1152 req
->VolatileFileId
= volatile_fid
;
1154 iov
[0].iov_base
= (char *)req
;
1155 /* 4 for rfc1002 length field */
1156 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1158 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1159 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1163 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1167 /* BB FIXME - decode close response, update inode for caching */
1170 free_rsp_buf(resp_buftype
, rsp
);
1175 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1176 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1179 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1180 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1181 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1182 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1185 if (buffer_length
< min_buf_size
) {
1186 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1187 buffer_length
, min_buf_size
);
1191 /* check if beyond RFC1001 maximum length */
1192 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1193 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1194 buffer_length
, smb_len
);
1198 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1199 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1207 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1208 * Caller must free buffer.
1211 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1212 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1216 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1222 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1226 memcpy(data
, begin_of_buf
, buffer_length
);
1232 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1233 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1234 size_t output_len
, size_t min_len
, void *data
)
1236 struct smb2_query_info_req
*req
;
1237 struct smb2_query_info_rsp
*rsp
= NULL
;
1241 struct TCP_Server_Info
*server
;
1242 struct cifs_ses
*ses
= tcon
->ses
;
1244 cifs_dbg(FYI
, "Query Info\n");
1246 if (ses
&& (ses
->server
))
1247 server
= ses
->server
;
1251 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1255 req
->InfoType
= SMB2_O_INFO_FILE
;
1256 req
->FileInfoClass
= info_class
;
1257 req
->PersistentFileId
= persistent_fid
;
1258 req
->VolatileFileId
= volatile_fid
;
1259 /* 4 for rfc1002 length field and 1 for Buffer */
1260 req
->InputBufferOffset
=
1261 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1262 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1264 iov
[0].iov_base
= (char *)req
;
1265 /* 4 for rfc1002 length field */
1266 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1268 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1269 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1272 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1276 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1277 le32_to_cpu(rsp
->OutputBufferLength
),
1278 &rsp
->hdr
, min_len
, data
);
1281 free_rsp_buf(resp_buftype
, rsp
);
1286 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1287 u64 persistent_fid
, u64 volatile_fid
,
1288 struct smb2_file_all_info
*data
)
1290 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1291 FILE_ALL_INFORMATION
,
1292 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1293 sizeof(struct smb2_file_all_info
), data
);
1297 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1298 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1300 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1301 FILE_INTERNAL_INFORMATION
,
1302 sizeof(struct smb2_file_internal_info
),
1303 sizeof(struct smb2_file_internal_info
), uniqueid
);
1307 * This is a no-op for now. We're not really interested in the reply, but
1308 * rather in the fact that the server sent one and that server->lstrp
1311 * FIXME: maybe we should consider checking that the reply matches request?
1314 smb2_echo_callback(struct mid_q_entry
*mid
)
1316 struct TCP_Server_Info
*server
= mid
->callback_data
;
1317 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1318 unsigned int credits_received
= 1;
1320 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1321 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1323 DeleteMidQEntry(mid
);
1324 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1328 SMB2_echo(struct TCP_Server_Info
*server
)
1330 struct smb2_echo_req
*req
;
1333 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1336 cifs_dbg(FYI
, "In echo request\n");
1338 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1342 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1344 iov
.iov_base
= (char *)req
;
1345 /* 4 for rfc1002 length field */
1346 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1348 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1351 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
1353 cifs_small_buf_release(req
);
1358 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1361 struct smb2_flush_req
*req
;
1362 struct TCP_Server_Info
*server
;
1363 struct cifs_ses
*ses
= tcon
->ses
;
1368 cifs_dbg(FYI
, "Flush\n");
1370 if (ses
&& (ses
->server
))
1371 server
= ses
->server
;
1375 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1379 req
->PersistentFileId
= persistent_fid
;
1380 req
->VolatileFileId
= volatile_fid
;
1382 iov
[0].iov_base
= (char *)req
;
1383 /* 4 for rfc1002 length field */
1384 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1386 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1388 if ((rc
!= 0) && tcon
)
1389 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1391 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1396 * To form a chain of read requests, any read requests after the first should
1397 * have the end_of_chain boolean set to true.
1400 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1401 unsigned int remaining_bytes
, int request_type
)
1404 struct smb2_read_req
*req
= NULL
;
1406 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1409 if (io_parms
->tcon
->ses
->server
== NULL
)
1410 return -ECONNABORTED
;
1412 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1414 req
->PersistentFileId
= io_parms
->persistent_fid
;
1415 req
->VolatileFileId
= io_parms
->volatile_fid
;
1416 req
->ReadChannelInfoOffset
= 0; /* reserved */
1417 req
->ReadChannelInfoLength
= 0; /* reserved */
1418 req
->Channel
= 0; /* reserved */
1419 req
->MinimumCount
= 0;
1420 req
->Length
= cpu_to_le32(io_parms
->length
);
1421 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1423 if (request_type
& CHAINED_REQUEST
) {
1424 if (!(request_type
& END_OF_CHAIN
)) {
1425 /* 4 for rfc1002 length field */
1426 req
->hdr
.NextCommand
=
1427 cpu_to_le32(get_rfc1002_length(req
) + 4);
1428 } else /* END_OF_CHAIN */
1429 req
->hdr
.NextCommand
= 0;
1430 if (request_type
& RELATED_REQUEST
) {
1431 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1433 * Related requests use info from previous read request
1436 req
->hdr
.SessionId
= 0xFFFFFFFF;
1437 req
->hdr
.TreeId
= 0xFFFFFFFF;
1438 req
->PersistentFileId
= 0xFFFFFFFF;
1439 req
->VolatileFileId
= 0xFFFFFFFF;
1442 if (remaining_bytes
> io_parms
->length
)
1443 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1445 req
->RemainingBytes
= 0;
1447 iov
[0].iov_base
= (char *)req
;
1448 /* 4 for rfc1002 length field */
1449 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1454 smb2_readv_callback(struct mid_q_entry
*mid
)
1456 struct cifs_readdata
*rdata
= mid
->callback_data
;
1457 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1458 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1459 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1460 unsigned int credits_received
= 1;
1461 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1463 .rq_pages
= rdata
->pages
,
1464 .rq_npages
= rdata
->nr_pages
,
1465 .rq_pagesz
= rdata
->pagesz
,
1466 .rq_tailsz
= rdata
->tailsz
};
1468 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1469 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
1472 switch (mid
->mid_state
) {
1473 case MID_RESPONSE_RECEIVED
:
1474 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1475 /* result already set, check signature */
1479 rc
= smb2_verify_signature(&rqst
, server
);
1481 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
1484 /* FIXME: should this be counted toward the initiating task? */
1485 task_io_account_read(rdata
->bytes
);
1486 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1488 case MID_REQUEST_SUBMITTED
:
1489 case MID_RETRY_NEEDED
:
1490 rdata
->result
= -EAGAIN
;
1493 if (rdata
->result
!= -ENODATA
)
1494 rdata
->result
= -EIO
;
1498 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1500 queue_work(cifsiod_wq
, &rdata
->work
);
1501 DeleteMidQEntry(mid
);
1502 add_credits(server
, credits_received
, 0);
1505 /* smb2_async_readv - send an async write, and set up mid to handle result */
1507 smb2_async_readv(struct cifs_readdata
*rdata
)
1510 struct smb2_hdr
*buf
;
1511 struct cifs_io_parms io_parms
;
1512 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1515 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
1516 __func__
, rdata
->offset
, rdata
->bytes
);
1518 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1519 io_parms
.offset
= rdata
->offset
;
1520 io_parms
.length
= rdata
->bytes
;
1521 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1522 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1523 io_parms
.pid
= rdata
->pid
;
1524 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1528 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1529 /* 4 for rfc1002 length field */
1530 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1532 kref_get(&rdata
->refcount
);
1533 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1534 cifs_readv_receive
, smb2_readv_callback
,
1537 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1538 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1541 cifs_small_buf_release(buf
);
1546 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1547 unsigned int *nbytes
, char **buf
, int *buf_type
)
1549 int resp_buftype
, rc
= -EACCES
;
1550 struct smb2_read_rsp
*rsp
= NULL
;
1554 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1558 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1559 &resp_buftype
, CIFS_LOG_ERROR
);
1561 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1563 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1564 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1569 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1570 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
1572 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1573 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1574 (*nbytes
> io_parms
->length
)) {
1575 cifs_dbg(FYI
, "bad length %d for count %d\n",
1576 *nbytes
, io_parms
->length
);
1583 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1585 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1586 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1587 *buf
= iov
[0].iov_base
;
1588 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1589 *buf_type
= CIFS_SMALL_BUFFER
;
1590 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1591 *buf_type
= CIFS_LARGE_BUFFER
;
1597 * Check the mid_state and signature on received buffer (if any), and queue the
1598 * workqueue completion task.
1601 smb2_writev_callback(struct mid_q_entry
*mid
)
1603 struct cifs_writedata
*wdata
= mid
->callback_data
;
1604 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1605 unsigned int written
;
1606 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1607 unsigned int credits_received
= 1;
1609 switch (mid
->mid_state
) {
1610 case MID_RESPONSE_RECEIVED
:
1611 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1612 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1613 if (wdata
->result
!= 0)
1616 written
= le32_to_cpu(rsp
->DataLength
);
1618 * Mask off high 16 bits when bytes written as returned
1619 * by the server is greater than bytes requested by the
1620 * client. OS/2 servers are known to set incorrect
1623 if (written
> wdata
->bytes
)
1626 if (written
< wdata
->bytes
)
1627 wdata
->result
= -ENOSPC
;
1629 wdata
->bytes
= written
;
1631 case MID_REQUEST_SUBMITTED
:
1632 case MID_RETRY_NEEDED
:
1633 wdata
->result
= -EAGAIN
;
1636 wdata
->result
= -EIO
;
1641 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1643 queue_work(cifsiod_wq
, &wdata
->work
);
1644 DeleteMidQEntry(mid
);
1645 add_credits(tcon
->ses
->server
, credits_received
, 0);
1648 /* smb2_async_writev - send an async write, and set up mid to handle result */
1650 smb2_async_writev(struct cifs_writedata
*wdata
)
1653 struct smb2_write_req
*req
= NULL
;
1654 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1656 struct smb_rqst rqst
;
1658 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1660 goto async_writev_out
;
1662 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1664 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1665 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1666 req
->WriteChannelInfoOffset
= 0;
1667 req
->WriteChannelInfoLength
= 0;
1669 req
->Offset
= cpu_to_le64(wdata
->offset
);
1670 /* 4 for rfc1002 length field */
1671 req
->DataOffset
= cpu_to_le16(
1672 offsetof(struct smb2_write_req
, Buffer
) - 4);
1673 req
->RemainingBytes
= 0;
1675 /* 4 for rfc1002 length field and 1 for Buffer */
1676 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1681 rqst
.rq_pages
= wdata
->pages
;
1682 rqst
.rq_npages
= wdata
->nr_pages
;
1683 rqst
.rq_pagesz
= wdata
->pagesz
;
1684 rqst
.rq_tailsz
= wdata
->tailsz
;
1686 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
1687 wdata
->offset
, wdata
->bytes
);
1689 req
->Length
= cpu_to_le32(wdata
->bytes
);
1691 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1693 kref_get(&wdata
->refcount
);
1694 rc
= cifs_call_async(tcon
->ses
->server
, &rqst
, NULL
,
1695 smb2_writev_callback
, wdata
, 0);
1698 kref_put(&wdata
->refcount
, cifs_writedata_release
);
1699 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1703 cifs_small_buf_release(req
);
1708 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1709 * The length field from io_parms must be at least 1 and indicates a number of
1710 * elements with data to write that begins with position 1 in iov array. All
1711 * data length is specified by count.
1714 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1715 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1718 struct smb2_write_req
*req
= NULL
;
1719 struct smb2_write_rsp
*rsp
= NULL
;
1726 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1730 if (io_parms
->tcon
->ses
->server
== NULL
)
1731 return -ECONNABORTED
;
1733 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1735 req
->PersistentFileId
= io_parms
->persistent_fid
;
1736 req
->VolatileFileId
= io_parms
->volatile_fid
;
1737 req
->WriteChannelInfoOffset
= 0;
1738 req
->WriteChannelInfoLength
= 0;
1740 req
->Length
= cpu_to_le32(io_parms
->length
);
1741 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1742 /* 4 for rfc1002 length field */
1743 req
->DataOffset
= cpu_to_le16(
1744 offsetof(struct smb2_write_req
, Buffer
) - 4);
1745 req
->RemainingBytes
= 0;
1747 iov
[0].iov_base
= (char *)req
;
1748 /* 4 for rfc1002 length field and 1 for Buffer */
1749 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1751 /* length of entire message including data to be written */
1752 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1754 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
1756 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
1759 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
1760 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
1762 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1764 free_rsp_buf(resp_buftype
, rsp
);
1769 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
1772 unsigned int entrycount
= 0;
1773 unsigned int next_offset
= 0;
1774 FILE_DIRECTORY_INFO
*entryptr
;
1776 if (bufstart
== NULL
)
1779 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
1782 entryptr
= (FILE_DIRECTORY_INFO
*)
1783 ((char *)entryptr
+ next_offset
);
1785 if ((char *)entryptr
+ size
> end_of_buf
) {
1786 cifs_dbg(VFS
, "malformed search entry would overflow\n");
1790 len
= le32_to_cpu(entryptr
->FileNameLength
);
1791 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
1792 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
1797 *lastentry
= (char *)entryptr
;
1800 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
1812 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
1813 u64 persistent_fid
, u64 volatile_fid
, int index
,
1814 struct cifs_search_info
*srch_inf
)
1816 struct smb2_query_directory_req
*req
;
1817 struct smb2_query_directory_rsp
*rsp
= NULL
;
1822 unsigned char *bufptr
;
1823 struct TCP_Server_Info
*server
;
1824 struct cifs_ses
*ses
= tcon
->ses
;
1825 __le16 asteriks
= cpu_to_le16('*');
1827 unsigned int output_size
= CIFSMaxBufSize
;
1828 size_t info_buf_size
;
1830 if (ses
&& (ses
->server
))
1831 server
= ses
->server
;
1835 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
1839 switch (srch_inf
->info_level
) {
1840 case SMB_FIND_FILE_DIRECTORY_INFO
:
1841 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
1842 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
1844 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
1845 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
1846 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
1849 cifs_dbg(VFS
, "info level %u isn't supported\n",
1850 srch_inf
->info_level
);
1855 req
->FileIndex
= cpu_to_le32(index
);
1856 req
->PersistentFileId
= persistent_fid
;
1857 req
->VolatileFileId
= volatile_fid
;
1860 bufptr
= req
->Buffer
;
1861 memcpy(bufptr
, &asteriks
, len
);
1863 req
->FileNameOffset
=
1864 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
1865 req
->FileNameLength
= cpu_to_le16(len
);
1867 * BB could be 30 bytes or so longer if we used SMB2 specific
1868 * buffer lengths, but this is safe and close enough.
1870 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
1871 output_size
= min_t(unsigned int, output_size
, 2 << 15);
1872 req
->OutputBufferLength
= cpu_to_le32(output_size
);
1874 iov
[0].iov_base
= (char *)req
;
1875 /* 4 for RFC1001 length and 1 for Buffer */
1876 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1878 iov
[1].iov_base
= (char *)(req
->Buffer
);
1879 iov
[1].iov_len
= len
;
1881 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
1883 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
1884 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
1887 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
1891 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1892 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
1897 srch_inf
->unicode
= true;
1899 if (srch_inf
->ntwrk_buf_start
) {
1900 if (srch_inf
->smallBuf
)
1901 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
1903 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
1905 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
1906 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
1907 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
1908 /* 4 for rfc1002 length field */
1909 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
1910 srch_inf
->entries_in_buffer
=
1911 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
1912 &srch_inf
->last_entry
, info_buf_size
);
1913 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
1914 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
1915 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
1916 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
1917 if (resp_buftype
== CIFS_LARGE_BUFFER
)
1918 srch_inf
->smallBuf
= false;
1919 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
1920 srch_inf
->smallBuf
= true;
1922 cifs_dbg(VFS
, "illegal search buffer type\n");
1924 if (rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
)
1925 srch_inf
->endOfSearch
= 1;
1927 srch_inf
->endOfSearch
= 0;
1932 free_rsp_buf(resp_buftype
, rsp
);
1937 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1938 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
1939 unsigned int num
, void **data
, unsigned int *size
)
1941 struct smb2_set_info_req
*req
;
1942 struct smb2_set_info_rsp
*rsp
= NULL
;
1947 struct TCP_Server_Info
*server
;
1948 struct cifs_ses
*ses
= tcon
->ses
;
1950 if (ses
&& (ses
->server
))
1951 server
= ses
->server
;
1958 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
1962 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
1968 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
1970 req
->InfoType
= SMB2_O_INFO_FILE
;
1971 req
->FileInfoClass
= info_class
;
1972 req
->PersistentFileId
= persistent_fid
;
1973 req
->VolatileFileId
= volatile_fid
;
1975 /* 4 for RFC1001 length and 1 for Buffer */
1977 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
1978 req
->BufferLength
= cpu_to_le32(*size
);
1980 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
1982 memcpy(req
->Buffer
, *data
, *size
);
1984 iov
[0].iov_base
= (char *)req
;
1985 /* 4 for RFC1001 length */
1986 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1988 for (i
= 1; i
< num
; i
++) {
1989 inc_rfc1001_len(req
, size
[i
]);
1990 le32_add_cpu(&req
->BufferLength
, size
[i
]);
1991 iov
[i
].iov_base
= (char *)data
[i
];
1992 iov
[i
].iov_len
= size
[i
];
1995 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
1996 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
1999 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
2003 free_rsp_buf(resp_buftype
, rsp
);
2009 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
2010 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2012 struct smb2_file_rename_info info
;
2014 unsigned int size
[2];
2016 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2018 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2022 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
2023 /* 0 = fail if target already exists */
2024 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2025 info
.FileNameLength
= cpu_to_le32(len
);
2028 size
[0] = sizeof(struct smb2_file_rename_info
);
2030 data
[1] = target_file
;
2031 size
[1] = len
+ 2 /* null */;
2033 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2034 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2041 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2042 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2044 struct smb2_file_link_info info
;
2046 unsigned int size
[2];
2048 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2050 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2054 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2055 /* 0 = fail if link already exists */
2056 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2057 info
.FileNameLength
= cpu_to_le32(len
);
2060 size
[0] = sizeof(struct smb2_file_link_info
);
2062 data
[1] = target_file
;
2063 size
[1] = len
+ 2 /* null */;
2065 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2066 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2072 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2073 u64 volatile_fid
, u32 pid
, __le64
*eof
)
2075 struct smb2_file_eof_info info
;
2079 info
.EndOfFile
= *eof
;
2082 size
= sizeof(struct smb2_file_eof_info
);
2084 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
2085 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2089 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2090 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2093 size
= sizeof(FILE_BASIC_INFO
);
2094 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2095 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2096 (void **)&buf
, &size
);
2100 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2101 const u64 persistent_fid
, const u64 volatile_fid
,
2105 struct smb2_oplock_break
*req
= NULL
;
2107 cifs_dbg(FYI
, "SMB2_oplock_break\n");
2108 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2113 req
->VolatileFid
= volatile_fid
;
2114 req
->PersistentFid
= persistent_fid
;
2115 req
->OplockLevel
= oplock_level
;
2116 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2118 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2119 /* SMB2 buffer freed by function above */
2122 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2123 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
2130 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2131 struct kstatfs
*kst
)
2133 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2134 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2135 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2136 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2137 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2142 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2143 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2146 struct smb2_query_info_req
*req
;
2148 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2150 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2153 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2157 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2158 req
->FileInfoClass
= level
;
2159 req
->PersistentFileId
= persistent_fid
;
2160 req
->VolatileFileId
= volatile_fid
;
2161 /* 4 for rfc1002 length field and 1 for pad */
2162 req
->InputBufferOffset
=
2163 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2164 req
->OutputBufferLength
= cpu_to_le32(
2165 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2167 iov
->iov_base
= (char *)req
;
2168 /* 4 for rfc1002 length field */
2169 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2174 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2175 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2177 struct smb2_query_info_rsp
*rsp
= NULL
;
2181 struct cifs_ses
*ses
= tcon
->ses
;
2182 struct smb2_fs_full_size_info
*info
= NULL
;
2184 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2185 sizeof(struct smb2_fs_full_size_info
),
2186 persistent_fid
, volatile_fid
);
2190 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2192 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2195 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2197 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2198 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2199 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2200 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2201 sizeof(struct smb2_fs_full_size_info
));
2203 copy_fs_info_to_kstatfs(info
, fsdata
);
2206 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2211 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2212 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2213 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2216 struct smb2_lock_req
*req
= NULL
;
2221 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2223 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2227 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2228 req
->LockCount
= cpu_to_le16(num_lock
);
2230 req
->PersistentFileId
= persist_fid
;
2231 req
->VolatileFileId
= volatile_fid
;
2233 count
= num_lock
* sizeof(struct smb2_lock_element
);
2234 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2236 iov
[0].iov_base
= (char *)req
;
2237 /* 4 for rfc1002 length field and count for all locks */
2238 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2239 iov
[1].iov_base
= (char *)buf
;
2240 iov
[1].iov_len
= count
;
2242 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2243 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2245 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2246 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2253 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2254 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2255 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2258 struct smb2_lock_element lock
;
2260 lock
.Offset
= cpu_to_le64(offset
);
2261 lock
.Length
= cpu_to_le64(length
);
2262 lock
.Flags
= cpu_to_le32(lock_flags
);
2263 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2264 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2266 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2270 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2271 __u8
*lease_key
, const __le32 lease_state
)
2274 struct smb2_lease_ack
*req
= NULL
;
2276 cifs_dbg(FYI
, "SMB2_lease_break\n");
2277 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2282 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2283 req
->StructureSize
= cpu_to_le16(36);
2284 inc_rfc1001_len(req
, 12);
2286 memcpy(req
->LeaseKey
, lease_key
, 16);
2287 req
->LeaseState
= lease_state
;
2289 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2290 /* SMB2 buffer freed by function above */
2293 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2294 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);