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 we are here due to reconnect, free per-smb session key
482 * in case signing was required.
484 kfree(ses
->auth_key
.response
);
485 ses
->auth_key
.response
= NULL
;
488 * If memory allocation is successful, caller of this function
491 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
494 ses
->ntlmssp
->sesskey_per_smbsess
= true;
496 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
497 ses
->sectype
= RawNTLMSSP
;
499 ssetup_ntlmssp_authenticate
:
500 if (phase
== NtLmChallenge
)
501 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
503 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
507 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
508 req
->VcNumber
= 0; /* MBZ */
509 /* to enable echos and oplocks */
510 req
->hdr
.CreditRequest
= cpu_to_le16(3);
512 /* only one of SMB2 signing flags may be set in SMB2 request */
514 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
515 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
516 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
518 req
->SecurityMode
= 0;
520 req
->Capabilities
= 0;
521 req
->Channel
= 0; /* MBZ */
523 iov
[0].iov_base
= (char *)req
;
524 /* 4 for rfc1002 length field and 1 for pad */
525 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
526 if (phase
== NtLmNegotiate
) {
527 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
529 if (ntlmssp_blob
== NULL
) {
533 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
535 /* blob_length = build_spnego_ntlmssp_blob(
537 sizeof(struct _NEGOTIATE_MESSAGE),
539 /* BB eventually need to add this */
540 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
545 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
546 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
547 security_blob
= ntlmssp_blob
;
549 } else if (phase
== NtLmAuthenticate
) {
550 req
->hdr
.SessionId
= ses
->Suid
;
551 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
553 if (ntlmssp_blob
== NULL
) {
557 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
560 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n",
562 goto ssetup_exit
; /* BB double check error handling */
565 /* blob_length = build_spnego_ntlmssp_blob(
569 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
574 security_blob
= ntlmssp_blob
;
577 cifs_dbg(VFS
, "illegal ntlmssp phase\n");
582 /* Testing shows that buffer offset must be at location of Buffer[0] */
583 req
->SecurityBufferOffset
=
584 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
585 1 /* pad */ - 4 /* rfc1001 len */);
586 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
587 iov
[1].iov_base
= security_blob
;
588 iov
[1].iov_len
= blob_length
;
590 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
592 /* BB add code to build os and lm fields */
594 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
,
595 CIFS_LOG_ERROR
| CIFS_NEG_OP
);
597 kfree(security_blob
);
598 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
599 if (resp_buftype
!= CIFS_NO_BUFFER
&&
600 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
601 if (phase
!= NtLmNegotiate
) {
602 cifs_dbg(VFS
, "Unexpected more processing error\n");
605 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
606 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
607 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
608 le16_to_cpu(rsp
->SecurityBufferOffset
));
613 /* NTLMSSP Negotiate sent now processing challenge (response) */
614 phase
= NtLmChallenge
; /* process ntlmssp challenge */
615 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
616 ses
->Suid
= rsp
->hdr
.SessionId
;
617 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
618 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
622 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
623 * but at least the raw NTLMSSP case works.
626 * No tcon so can't do
627 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
632 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
634 free_rsp_buf(resp_buftype
, rsp
);
636 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
637 if ((phase
== NtLmChallenge
) && (rc
== 0))
638 goto ssetup_ntlmssp_authenticate
;
641 mutex_lock(&server
->srv_mutex
);
642 if (server
->sign
&& server
->ops
->generate_signingkey
) {
643 rc
= server
->ops
->generate_signingkey(ses
);
644 kfree(ses
->auth_key
.response
);
645 ses
->auth_key
.response
= NULL
;
648 "SMB3 session key generation failed\n");
649 mutex_unlock(&server
->srv_mutex
);
653 if (!server
->session_estab
) {
654 server
->sequence_number
= 0x2;
655 server
->session_estab
= true;
657 mutex_unlock(&server
->srv_mutex
);
659 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
660 spin_lock(&GlobalMid_Lock
);
661 ses
->status
= CifsGood
;
662 ses
->need_reconnect
= false;
663 spin_unlock(&GlobalMid_Lock
);
668 kfree(ses
->auth_key
.response
);
669 ses
->auth_key
.response
= NULL
;
677 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
679 struct smb2_logoff_req
*req
; /* response is also trivial struct */
681 struct TCP_Server_Info
*server
;
683 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
685 if (ses
&& (ses
->server
))
686 server
= ses
->server
;
690 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
694 /* since no tcon, smb2_init can not do this, so do here */
695 req
->hdr
.SessionId
= ses
->Suid
;
697 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
699 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
701 * No tcon so can't do
702 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
707 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
709 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
712 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
715 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
716 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
718 struct smb2_tree_connect_req
*req
;
719 struct smb2_tree_connect_rsp
*rsp
= NULL
;
724 struct TCP_Server_Info
*server
;
725 __le16
*unc_path
= NULL
;
727 cifs_dbg(FYI
, "TCON\n");
729 if ((ses
->server
) && tree
)
730 server
= ses
->server
;
734 if (tcon
&& tcon
->bad_network_name
)
737 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
738 if (unc_path
== NULL
)
741 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
743 if (unc_path_len
< 2) {
748 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
755 /* since no tcon, smb2_init can not do this, so do here */
756 req
->hdr
.SessionId
= ses
->Suid
;
757 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
758 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
761 iov
[0].iov_base
= (char *)req
;
762 /* 4 for rfc1002 length field and 1 for pad */
763 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
765 /* Testing shows that buffer offset must be at location of Buffer[0] */
766 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
767 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
768 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
769 iov
[1].iov_base
= unc_path
;
770 iov
[1].iov_len
= unc_path_len
;
772 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
774 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
775 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
779 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
780 tcon
->need_reconnect
= true;
782 goto tcon_error_exit
;
786 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
790 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
791 cifs_dbg(FYI
, "connection to disk share\n");
792 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
794 cifs_dbg(FYI
, "connection to pipe share\n");
795 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
797 cifs_dbg(FYI
, "connection to printer\n");
799 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
801 goto tcon_error_exit
;
804 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
805 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
806 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
807 tcon
->tidStatus
= CifsGood
;
808 tcon
->need_reconnect
= false;
809 tcon
->tid
= rsp
->hdr
.TreeId
;
810 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
812 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
813 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
814 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
817 free_rsp_buf(resp_buftype
, rsp
);
822 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
823 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
824 tcon
->bad_network_name
= true;
830 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
832 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
834 struct TCP_Server_Info
*server
;
835 struct cifs_ses
*ses
= tcon
->ses
;
837 cifs_dbg(FYI
, "Tree Disconnect\n");
839 if (ses
&& (ses
->server
))
840 server
= ses
->server
;
844 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
847 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
851 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
853 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
859 static struct create_durable
*
860 create_durable_buf(void)
862 struct create_durable
*buf
;
864 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
868 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
869 (struct create_durable
, Data
));
870 buf
->ccontext
.DataLength
= cpu_to_le32(16);
871 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
872 (struct create_durable
, Name
));
873 buf
->ccontext
.NameLength
= cpu_to_le16(4);
881 static struct create_durable
*
882 create_reconnect_durable_buf(struct cifs_fid
*fid
)
884 struct create_durable
*buf
;
886 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
890 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
891 (struct create_durable
, Data
));
892 buf
->ccontext
.DataLength
= cpu_to_le32(16);
893 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
894 (struct create_durable
, Name
));
895 buf
->ccontext
.NameLength
= cpu_to_le16(4);
896 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
897 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
906 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
910 struct create_context
*cc
;
911 unsigned int next
= 0;
914 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
915 cc
= (struct create_context
*)data_offset
;
917 cc
= (struct create_context
*)((char *)cc
+ next
);
918 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
919 if (le16_to_cpu(cc
->NameLength
) != 4 ||
920 strncmp(name
, "RqLs", 4)) {
921 next
= le32_to_cpu(cc
->Next
);
924 return server
->ops
->parse_lease_buf(cc
, epoch
);
931 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
932 unsigned int *num_iovec
, __u8
*oplock
)
934 struct smb2_create_req
*req
= iov
[0].iov_base
;
935 unsigned int num
= *num_iovec
;
937 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
938 if (iov
[num
].iov_base
== NULL
)
940 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
941 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
942 if (!req
->CreateContextsOffset
)
943 req
->CreateContextsOffset
= cpu_to_le32(
944 sizeof(struct smb2_create_req
) - 4 +
945 iov
[num
- 1].iov_len
);
946 le32_add_cpu(&req
->CreateContextsLength
,
947 server
->vals
->create_lease_size
);
948 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
949 *num_iovec
= num
+ 1;
954 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
955 struct cifs_open_parms
*oparms
)
957 struct smb2_create_req
*req
= iov
[0].iov_base
;
958 unsigned int num
= *num_iovec
;
960 if (oparms
->reconnect
) {
961 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
962 /* indicate that we don't need to relock the file */
963 oparms
->reconnect
= false;
965 iov
[num
].iov_base
= create_durable_buf();
966 if (iov
[num
].iov_base
== NULL
)
968 iov
[num
].iov_len
= sizeof(struct create_durable
);
969 if (!req
->CreateContextsOffset
)
970 req
->CreateContextsOffset
=
971 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
973 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
974 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
975 *num_iovec
= num
+ 1;
980 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
981 __u8
*oplock
, struct smb2_file_all_info
*buf
,
982 struct smb2_err_rsp
**err_buf
)
984 struct smb2_create_req
*req
;
985 struct smb2_create_rsp
*rsp
;
986 struct TCP_Server_Info
*server
;
987 struct cifs_tcon
*tcon
= oparms
->tcon
;
988 struct cifs_ses
*ses
= tcon
->ses
;
992 __le16
*copy_path
= NULL
;
995 unsigned int num_iovecs
= 2;
996 __u32 file_attributes
= 0;
998 cifs_dbg(FYI
, "create/open\n");
1000 if (ses
&& (ses
->server
))
1001 server
= ses
->server
;
1005 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1009 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1010 file_attributes
|= ATTR_READONLY
;
1012 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1013 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1014 /* File attributes ignored on open (used in create though) */
1015 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1016 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1017 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1018 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1019 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1020 /* do not count rfc1001 len field */
1021 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
1023 iov
[0].iov_base
= (char *)req
;
1024 /* 4 for rfc1002 length field */
1025 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1027 /* MUST set path len (NameLength) to 0 opening root of share */
1028 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1029 /* -1 since last byte is buf[0] which is sent below (path) */
1031 if (uni_path_len
% 8 != 0) {
1032 copy_size
= uni_path_len
/ 8 * 8;
1033 if (copy_size
< uni_path_len
)
1036 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1039 memcpy((char *)copy_path
, (const char *)path
,
1041 uni_path_len
= copy_size
;
1045 iov
[1].iov_len
= uni_path_len
;
1046 iov
[1].iov_base
= path
;
1047 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1048 inc_rfc1001_len(req
, uni_path_len
- 1);
1050 if (!server
->oplocks
)
1051 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1053 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1054 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1055 req
->RequestedOplockLevel
= *oplock
;
1057 rc
= add_lease_context(server
, iov
, &num_iovecs
, oplock
);
1059 cifs_small_buf_release(req
);
1065 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1066 /* need to set Next field of lease context if we request it */
1067 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
1068 struct create_context
*ccontext
=
1069 (struct create_context
*)iov
[num_iovecs
-1].iov_base
;
1071 cpu_to_le32(server
->vals
->create_lease_size
);
1073 rc
= add_durable_context(iov
, &num_iovecs
, oparms
);
1075 cifs_small_buf_release(req
);
1077 kfree(iov
[num_iovecs
-1].iov_base
);
1082 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1083 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
1086 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1088 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1093 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1094 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1097 memcpy(buf
, &rsp
->CreationTime
, 32);
1098 buf
->AllocationSize
= rsp
->AllocationSize
;
1099 buf
->EndOfFile
= rsp
->EndofFile
;
1100 buf
->Attributes
= rsp
->FileAttributes
;
1101 buf
->NumberOfLinks
= cpu_to_le32(1);
1102 buf
->DeletePending
= 0;
1105 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1106 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1108 *oplock
= rsp
->OplockLevel
;
1111 free_rsp_buf(resp_buftype
, rsp
);
1116 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1119 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1120 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, char *in_data
,
1121 u32 indatalen
, char **out_data
, u32
*plen
/* returned data len */)
1123 struct smb2_ioctl_req
*req
;
1124 struct smb2_ioctl_rsp
*rsp
;
1125 struct TCP_Server_Info
*server
;
1126 struct cifs_ses
*ses
= tcon
->ses
;
1132 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1134 /* zero out returned data len, in case of error */
1138 if (ses
&& (ses
->server
))
1139 server
= ses
->server
;
1143 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1147 req
->CtlCode
= cpu_to_le32(opcode
);
1148 req
->PersistentFileId
= persistent_fid
;
1149 req
->VolatileFileId
= volatile_fid
;
1152 req
->InputCount
= cpu_to_le32(indatalen
);
1153 /* do not set InputOffset if no input data */
1155 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1156 iov
[1].iov_base
= in_data
;
1157 iov
[1].iov_len
= indatalen
;
1162 req
->OutputOffset
= 0;
1163 req
->OutputCount
= 0; /* MBZ */
1166 * Could increase MaxOutputResponse, but that would require more
1167 * than one credit. Windows typically sets this smaller, but for some
1168 * ioctls it may be useful to allow server to send more. No point
1169 * limiting what the server can send as long as fits in one credit
1171 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1174 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1178 iov
[0].iov_base
= (char *)req
;
1179 /* 4 for rfc1002 length field */
1180 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1183 inc_rfc1001_len(req
, indatalen
);
1185 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1186 rsp
= (struct smb2_ioctl_rsp
*)iov
[0].iov_base
;
1190 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1194 /* check if caller wants to look at return data or just return rc */
1195 if ((plen
== NULL
) || (out_data
== NULL
))
1198 *plen
= le32_to_cpu(rsp
->OutputCount
);
1200 /* We check for obvious errors in the output buffer length and offset */
1202 goto ioctl_exit
; /* server returned no data */
1203 else if (*plen
> 0xFF00) {
1204 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1210 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1211 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1212 le32_to_cpu(rsp
->OutputOffset
));
1218 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1219 if (*out_data
== NULL
) {
1224 memcpy(*out_data
, rsp
->hdr
.ProtocolId
+ le32_to_cpu(rsp
->OutputOffset
),
1227 free_rsp_buf(resp_buftype
, rsp
);
1232 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1233 u64 persistent_fid
, u64 volatile_fid
)
1235 struct smb2_close_req
*req
;
1236 struct smb2_close_rsp
*rsp
;
1237 struct TCP_Server_Info
*server
;
1238 struct cifs_ses
*ses
= tcon
->ses
;
1243 cifs_dbg(FYI
, "Close\n");
1245 if (ses
&& (ses
->server
))
1246 server
= ses
->server
;
1250 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1254 req
->PersistentFileId
= persistent_fid
;
1255 req
->VolatileFileId
= volatile_fid
;
1257 iov
[0].iov_base
= (char *)req
;
1258 /* 4 for rfc1002 length field */
1259 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1261 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1262 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1266 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1270 /* BB FIXME - decode close response, update inode for caching */
1273 free_rsp_buf(resp_buftype
, rsp
);
1278 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1279 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1282 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1283 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1284 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1285 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1288 if (buffer_length
< min_buf_size
) {
1289 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1290 buffer_length
, min_buf_size
);
1294 /* check if beyond RFC1001 maximum length */
1295 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1296 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1297 buffer_length
, smb_len
);
1301 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1302 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1310 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1311 * Caller must free buffer.
1314 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1315 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1319 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1325 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1329 memcpy(data
, begin_of_buf
, buffer_length
);
1335 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1336 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1337 size_t output_len
, size_t min_len
, void *data
)
1339 struct smb2_query_info_req
*req
;
1340 struct smb2_query_info_rsp
*rsp
= NULL
;
1344 struct TCP_Server_Info
*server
;
1345 struct cifs_ses
*ses
= tcon
->ses
;
1347 cifs_dbg(FYI
, "Query Info\n");
1349 if (ses
&& (ses
->server
))
1350 server
= ses
->server
;
1354 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1358 req
->InfoType
= SMB2_O_INFO_FILE
;
1359 req
->FileInfoClass
= info_class
;
1360 req
->PersistentFileId
= persistent_fid
;
1361 req
->VolatileFileId
= volatile_fid
;
1362 /* 4 for rfc1002 length field and 1 for Buffer */
1363 req
->InputBufferOffset
=
1364 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1365 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1367 iov
[0].iov_base
= (char *)req
;
1368 /* 4 for rfc1002 length field */
1369 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1371 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1372 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1375 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1379 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1380 le32_to_cpu(rsp
->OutputBufferLength
),
1381 &rsp
->hdr
, min_len
, data
);
1384 free_rsp_buf(resp_buftype
, rsp
);
1389 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1390 u64 persistent_fid
, u64 volatile_fid
,
1391 struct smb2_file_all_info
*data
)
1393 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1394 FILE_ALL_INFORMATION
,
1395 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1396 sizeof(struct smb2_file_all_info
), data
);
1400 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1401 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1403 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1404 FILE_INTERNAL_INFORMATION
,
1405 sizeof(struct smb2_file_internal_info
),
1406 sizeof(struct smb2_file_internal_info
), uniqueid
);
1410 * This is a no-op for now. We're not really interested in the reply, but
1411 * rather in the fact that the server sent one and that server->lstrp
1414 * FIXME: maybe we should consider checking that the reply matches request?
1417 smb2_echo_callback(struct mid_q_entry
*mid
)
1419 struct TCP_Server_Info
*server
= mid
->callback_data
;
1420 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1421 unsigned int credits_received
= 1;
1423 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1424 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1426 DeleteMidQEntry(mid
);
1427 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1431 SMB2_echo(struct TCP_Server_Info
*server
)
1433 struct smb2_echo_req
*req
;
1436 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1439 cifs_dbg(FYI
, "In echo request\n");
1441 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1445 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1447 iov
.iov_base
= (char *)req
;
1448 /* 4 for rfc1002 length field */
1449 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1451 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1454 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
1456 cifs_small_buf_release(req
);
1461 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1464 struct smb2_flush_req
*req
;
1465 struct TCP_Server_Info
*server
;
1466 struct cifs_ses
*ses
= tcon
->ses
;
1471 cifs_dbg(FYI
, "Flush\n");
1473 if (ses
&& (ses
->server
))
1474 server
= ses
->server
;
1478 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1482 req
->PersistentFileId
= persistent_fid
;
1483 req
->VolatileFileId
= volatile_fid
;
1485 iov
[0].iov_base
= (char *)req
;
1486 /* 4 for rfc1002 length field */
1487 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1489 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1491 if ((rc
!= 0) && tcon
)
1492 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1494 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1499 * To form a chain of read requests, any read requests after the first should
1500 * have the end_of_chain boolean set to true.
1503 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1504 unsigned int remaining_bytes
, int request_type
)
1507 struct smb2_read_req
*req
= NULL
;
1509 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1512 if (io_parms
->tcon
->ses
->server
== NULL
)
1513 return -ECONNABORTED
;
1515 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1517 req
->PersistentFileId
= io_parms
->persistent_fid
;
1518 req
->VolatileFileId
= io_parms
->volatile_fid
;
1519 req
->ReadChannelInfoOffset
= 0; /* reserved */
1520 req
->ReadChannelInfoLength
= 0; /* reserved */
1521 req
->Channel
= 0; /* reserved */
1522 req
->MinimumCount
= 0;
1523 req
->Length
= cpu_to_le32(io_parms
->length
);
1524 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1526 if (request_type
& CHAINED_REQUEST
) {
1527 if (!(request_type
& END_OF_CHAIN
)) {
1528 /* 4 for rfc1002 length field */
1529 req
->hdr
.NextCommand
=
1530 cpu_to_le32(get_rfc1002_length(req
) + 4);
1531 } else /* END_OF_CHAIN */
1532 req
->hdr
.NextCommand
= 0;
1533 if (request_type
& RELATED_REQUEST
) {
1534 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1536 * Related requests use info from previous read request
1539 req
->hdr
.SessionId
= 0xFFFFFFFF;
1540 req
->hdr
.TreeId
= 0xFFFFFFFF;
1541 req
->PersistentFileId
= 0xFFFFFFFF;
1542 req
->VolatileFileId
= 0xFFFFFFFF;
1545 if (remaining_bytes
> io_parms
->length
)
1546 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1548 req
->RemainingBytes
= 0;
1550 iov
[0].iov_base
= (char *)req
;
1551 /* 4 for rfc1002 length field */
1552 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1557 smb2_readv_callback(struct mid_q_entry
*mid
)
1559 struct cifs_readdata
*rdata
= mid
->callback_data
;
1560 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1561 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1562 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1563 unsigned int credits_received
= 1;
1564 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1566 .rq_pages
= rdata
->pages
,
1567 .rq_npages
= rdata
->nr_pages
,
1568 .rq_pagesz
= rdata
->pagesz
,
1569 .rq_tailsz
= rdata
->tailsz
};
1571 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1572 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
1575 switch (mid
->mid_state
) {
1576 case MID_RESPONSE_RECEIVED
:
1577 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1578 /* result already set, check signature */
1582 rc
= smb2_verify_signature(&rqst
, server
);
1584 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
1587 /* FIXME: should this be counted toward the initiating task? */
1588 task_io_account_read(rdata
->bytes
);
1589 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1591 case MID_REQUEST_SUBMITTED
:
1592 case MID_RETRY_NEEDED
:
1593 rdata
->result
= -EAGAIN
;
1596 if (rdata
->result
!= -ENODATA
)
1597 rdata
->result
= -EIO
;
1601 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1603 queue_work(cifsiod_wq
, &rdata
->work
);
1604 DeleteMidQEntry(mid
);
1605 add_credits(server
, credits_received
, 0);
1608 /* smb2_async_readv - send an async write, and set up mid to handle result */
1610 smb2_async_readv(struct cifs_readdata
*rdata
)
1613 struct smb2_hdr
*buf
;
1614 struct cifs_io_parms io_parms
;
1615 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1618 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
1619 __func__
, rdata
->offset
, rdata
->bytes
);
1621 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1622 io_parms
.offset
= rdata
->offset
;
1623 io_parms
.length
= rdata
->bytes
;
1624 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1625 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1626 io_parms
.pid
= rdata
->pid
;
1627 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1631 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1632 /* 4 for rfc1002 length field */
1633 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1635 kref_get(&rdata
->refcount
);
1636 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1637 cifs_readv_receive
, smb2_readv_callback
,
1640 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1641 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1644 cifs_small_buf_release(buf
);
1649 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1650 unsigned int *nbytes
, char **buf
, int *buf_type
)
1652 int resp_buftype
, rc
= -EACCES
;
1653 struct smb2_read_rsp
*rsp
= NULL
;
1657 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1661 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1662 &resp_buftype
, CIFS_LOG_ERROR
);
1664 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1666 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1667 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1672 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1673 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
1675 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1676 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1677 (*nbytes
> io_parms
->length
)) {
1678 cifs_dbg(FYI
, "bad length %d for count %d\n",
1679 *nbytes
, io_parms
->length
);
1686 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1688 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1689 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1690 *buf
= iov
[0].iov_base
;
1691 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1692 *buf_type
= CIFS_SMALL_BUFFER
;
1693 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1694 *buf_type
= CIFS_LARGE_BUFFER
;
1700 * Check the mid_state and signature on received buffer (if any), and queue the
1701 * workqueue completion task.
1704 smb2_writev_callback(struct mid_q_entry
*mid
)
1706 struct cifs_writedata
*wdata
= mid
->callback_data
;
1707 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1708 unsigned int written
;
1709 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1710 unsigned int credits_received
= 1;
1712 switch (mid
->mid_state
) {
1713 case MID_RESPONSE_RECEIVED
:
1714 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1715 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1716 if (wdata
->result
!= 0)
1719 written
= le32_to_cpu(rsp
->DataLength
);
1721 * Mask off high 16 bits when bytes written as returned
1722 * by the server is greater than bytes requested by the
1723 * client. OS/2 servers are known to set incorrect
1726 if (written
> wdata
->bytes
)
1729 if (written
< wdata
->bytes
)
1730 wdata
->result
= -ENOSPC
;
1732 wdata
->bytes
= written
;
1734 case MID_REQUEST_SUBMITTED
:
1735 case MID_RETRY_NEEDED
:
1736 wdata
->result
= -EAGAIN
;
1739 wdata
->result
= -EIO
;
1744 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1746 queue_work(cifsiod_wq
, &wdata
->work
);
1747 DeleteMidQEntry(mid
);
1748 add_credits(tcon
->ses
->server
, credits_received
, 0);
1751 /* smb2_async_writev - send an async write, and set up mid to handle result */
1753 smb2_async_writev(struct cifs_writedata
*wdata
)
1756 struct smb2_write_req
*req
= NULL
;
1757 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1759 struct smb_rqst rqst
;
1761 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1763 goto async_writev_out
;
1765 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1767 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1768 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1769 req
->WriteChannelInfoOffset
= 0;
1770 req
->WriteChannelInfoLength
= 0;
1772 req
->Offset
= cpu_to_le64(wdata
->offset
);
1773 /* 4 for rfc1002 length field */
1774 req
->DataOffset
= cpu_to_le16(
1775 offsetof(struct smb2_write_req
, Buffer
) - 4);
1776 req
->RemainingBytes
= 0;
1778 /* 4 for rfc1002 length field and 1 for Buffer */
1779 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1784 rqst
.rq_pages
= wdata
->pages
;
1785 rqst
.rq_npages
= wdata
->nr_pages
;
1786 rqst
.rq_pagesz
= wdata
->pagesz
;
1787 rqst
.rq_tailsz
= wdata
->tailsz
;
1789 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
1790 wdata
->offset
, wdata
->bytes
);
1792 req
->Length
= cpu_to_le32(wdata
->bytes
);
1794 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1796 kref_get(&wdata
->refcount
);
1797 rc
= cifs_call_async(tcon
->ses
->server
, &rqst
, NULL
,
1798 smb2_writev_callback
, wdata
, 0);
1801 kref_put(&wdata
->refcount
, cifs_writedata_release
);
1802 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1806 cifs_small_buf_release(req
);
1811 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1812 * The length field from io_parms must be at least 1 and indicates a number of
1813 * elements with data to write that begins with position 1 in iov array. All
1814 * data length is specified by count.
1817 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1818 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1821 struct smb2_write_req
*req
= NULL
;
1822 struct smb2_write_rsp
*rsp
= NULL
;
1829 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1833 if (io_parms
->tcon
->ses
->server
== NULL
)
1834 return -ECONNABORTED
;
1836 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1838 req
->PersistentFileId
= io_parms
->persistent_fid
;
1839 req
->VolatileFileId
= io_parms
->volatile_fid
;
1840 req
->WriteChannelInfoOffset
= 0;
1841 req
->WriteChannelInfoLength
= 0;
1843 req
->Length
= cpu_to_le32(io_parms
->length
);
1844 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1845 /* 4 for rfc1002 length field */
1846 req
->DataOffset
= cpu_to_le16(
1847 offsetof(struct smb2_write_req
, Buffer
) - 4);
1848 req
->RemainingBytes
= 0;
1850 iov
[0].iov_base
= (char *)req
;
1851 /* 4 for rfc1002 length field and 1 for Buffer */
1852 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1854 /* length of entire message including data to be written */
1855 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1857 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
1859 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
1862 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
1863 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
1865 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1867 free_rsp_buf(resp_buftype
, rsp
);
1872 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
1875 unsigned int entrycount
= 0;
1876 unsigned int next_offset
= 0;
1877 FILE_DIRECTORY_INFO
*entryptr
;
1879 if (bufstart
== NULL
)
1882 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
1885 entryptr
= (FILE_DIRECTORY_INFO
*)
1886 ((char *)entryptr
+ next_offset
);
1888 if ((char *)entryptr
+ size
> end_of_buf
) {
1889 cifs_dbg(VFS
, "malformed search entry would overflow\n");
1893 len
= le32_to_cpu(entryptr
->FileNameLength
);
1894 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
1895 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
1900 *lastentry
= (char *)entryptr
;
1903 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
1915 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
1916 u64 persistent_fid
, u64 volatile_fid
, int index
,
1917 struct cifs_search_info
*srch_inf
)
1919 struct smb2_query_directory_req
*req
;
1920 struct smb2_query_directory_rsp
*rsp
= NULL
;
1925 unsigned char *bufptr
;
1926 struct TCP_Server_Info
*server
;
1927 struct cifs_ses
*ses
= tcon
->ses
;
1928 __le16 asteriks
= cpu_to_le16('*');
1930 unsigned int output_size
= CIFSMaxBufSize
;
1931 size_t info_buf_size
;
1933 if (ses
&& (ses
->server
))
1934 server
= ses
->server
;
1938 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
1942 switch (srch_inf
->info_level
) {
1943 case SMB_FIND_FILE_DIRECTORY_INFO
:
1944 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
1945 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
1947 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
1948 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
1949 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
1952 cifs_dbg(VFS
, "info level %u isn't supported\n",
1953 srch_inf
->info_level
);
1958 req
->FileIndex
= cpu_to_le32(index
);
1959 req
->PersistentFileId
= persistent_fid
;
1960 req
->VolatileFileId
= volatile_fid
;
1963 bufptr
= req
->Buffer
;
1964 memcpy(bufptr
, &asteriks
, len
);
1966 req
->FileNameOffset
=
1967 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
1968 req
->FileNameLength
= cpu_to_le16(len
);
1970 * BB could be 30 bytes or so longer if we used SMB2 specific
1971 * buffer lengths, but this is safe and close enough.
1973 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
1974 output_size
= min_t(unsigned int, output_size
, 2 << 15);
1975 req
->OutputBufferLength
= cpu_to_le32(output_size
);
1977 iov
[0].iov_base
= (char *)req
;
1978 /* 4 for RFC1001 length and 1 for Buffer */
1979 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1981 iov
[1].iov_base
= (char *)(req
->Buffer
);
1982 iov
[1].iov_len
= len
;
1984 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
1986 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
1987 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
1990 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
1994 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1995 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2000 srch_inf
->unicode
= true;
2002 if (srch_inf
->ntwrk_buf_start
) {
2003 if (srch_inf
->smallBuf
)
2004 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
2006 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
2008 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
2009 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
2010 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
2011 /* 4 for rfc1002 length field */
2012 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
2013 srch_inf
->entries_in_buffer
=
2014 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
2015 &srch_inf
->last_entry
, info_buf_size
);
2016 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
2017 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
2018 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
2019 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
2020 if (resp_buftype
== CIFS_LARGE_BUFFER
)
2021 srch_inf
->smallBuf
= false;
2022 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
2023 srch_inf
->smallBuf
= true;
2025 cifs_dbg(VFS
, "illegal search buffer type\n");
2027 if (rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
)
2028 srch_inf
->endOfSearch
= 1;
2030 srch_inf
->endOfSearch
= 0;
2035 free_rsp_buf(resp_buftype
, rsp
);
2040 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2041 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
2042 unsigned int num
, void **data
, unsigned int *size
)
2044 struct smb2_set_info_req
*req
;
2045 struct smb2_set_info_rsp
*rsp
= NULL
;
2050 struct TCP_Server_Info
*server
;
2051 struct cifs_ses
*ses
= tcon
->ses
;
2053 if (ses
&& (ses
->server
))
2054 server
= ses
->server
;
2061 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
2065 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
2071 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2073 req
->InfoType
= SMB2_O_INFO_FILE
;
2074 req
->FileInfoClass
= info_class
;
2075 req
->PersistentFileId
= persistent_fid
;
2076 req
->VolatileFileId
= volatile_fid
;
2078 /* 4 for RFC1001 length and 1 for Buffer */
2080 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
2081 req
->BufferLength
= cpu_to_le32(*size
);
2083 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
2085 memcpy(req
->Buffer
, *data
, *size
);
2087 iov
[0].iov_base
= (char *)req
;
2088 /* 4 for RFC1001 length */
2089 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2091 for (i
= 1; i
< num
; i
++) {
2092 inc_rfc1001_len(req
, size
[i
]);
2093 le32_add_cpu(&req
->BufferLength
, size
[i
]);
2094 iov
[i
].iov_base
= (char *)data
[i
];
2095 iov
[i
].iov_len
= size
[i
];
2098 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
2099 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
2102 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
2106 free_rsp_buf(resp_buftype
, rsp
);
2112 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
2113 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2115 struct smb2_file_rename_info info
;
2117 unsigned int size
[2];
2119 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2121 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2125 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
2126 /* 0 = fail if target already exists */
2127 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2128 info
.FileNameLength
= cpu_to_le32(len
);
2131 size
[0] = sizeof(struct smb2_file_rename_info
);
2133 data
[1] = target_file
;
2134 size
[1] = len
+ 2 /* null */;
2136 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2137 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2144 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2145 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2147 struct smb2_file_link_info info
;
2149 unsigned int size
[2];
2151 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2153 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2157 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2158 /* 0 = fail if link already exists */
2159 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2160 info
.FileNameLength
= cpu_to_le32(len
);
2163 size
[0] = sizeof(struct smb2_file_link_info
);
2165 data
[1] = target_file
;
2166 size
[1] = len
+ 2 /* null */;
2168 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2169 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2175 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2176 u64 volatile_fid
, u32 pid
, __le64
*eof
)
2178 struct smb2_file_eof_info info
;
2182 info
.EndOfFile
= *eof
;
2185 size
= sizeof(struct smb2_file_eof_info
);
2187 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
2188 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2192 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2193 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2196 size
= sizeof(FILE_BASIC_INFO
);
2197 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2198 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2199 (void **)&buf
, &size
);
2203 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2204 const u64 persistent_fid
, const u64 volatile_fid
,
2208 struct smb2_oplock_break
*req
= NULL
;
2210 cifs_dbg(FYI
, "SMB2_oplock_break\n");
2211 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2216 req
->VolatileFid
= volatile_fid
;
2217 req
->PersistentFid
= persistent_fid
;
2218 req
->OplockLevel
= oplock_level
;
2219 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2221 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2222 /* SMB2 buffer freed by function above */
2225 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2226 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
2233 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2234 struct kstatfs
*kst
)
2236 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2237 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2238 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2239 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2240 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2245 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2246 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2249 struct smb2_query_info_req
*req
;
2251 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2253 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2256 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2260 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2261 req
->FileInfoClass
= level
;
2262 req
->PersistentFileId
= persistent_fid
;
2263 req
->VolatileFileId
= volatile_fid
;
2264 /* 4 for rfc1002 length field and 1 for pad */
2265 req
->InputBufferOffset
=
2266 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2267 req
->OutputBufferLength
= cpu_to_le32(
2268 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2270 iov
->iov_base
= (char *)req
;
2271 /* 4 for rfc1002 length field */
2272 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2277 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2278 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2280 struct smb2_query_info_rsp
*rsp
= NULL
;
2284 struct cifs_ses
*ses
= tcon
->ses
;
2285 struct smb2_fs_full_size_info
*info
= NULL
;
2287 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2288 sizeof(struct smb2_fs_full_size_info
),
2289 persistent_fid
, volatile_fid
);
2293 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2295 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2298 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2300 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2301 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2302 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2303 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2304 sizeof(struct smb2_fs_full_size_info
));
2306 copy_fs_info_to_kstatfs(info
, fsdata
);
2309 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2314 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2315 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2316 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2319 struct smb2_lock_req
*req
= NULL
;
2324 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2326 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2330 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2331 req
->LockCount
= cpu_to_le16(num_lock
);
2333 req
->PersistentFileId
= persist_fid
;
2334 req
->VolatileFileId
= volatile_fid
;
2336 count
= num_lock
* sizeof(struct smb2_lock_element
);
2337 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2339 iov
[0].iov_base
= (char *)req
;
2340 /* 4 for rfc1002 length field and count for all locks */
2341 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2342 iov
[1].iov_base
= (char *)buf
;
2343 iov
[1].iov_len
= count
;
2345 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2346 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2348 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2349 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2356 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2357 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2358 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2361 struct smb2_lock_element lock
;
2363 lock
.Offset
= cpu_to_le64(offset
);
2364 lock
.Length
= cpu_to_le64(length
);
2365 lock
.Flags
= cpu_to_le32(lock_flags
);
2366 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2367 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2369 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2373 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2374 __u8
*lease_key
, const __le32 lease_state
)
2377 struct smb2_lease_ack
*req
= NULL
;
2379 cifs_dbg(FYI
, "SMB2_lease_break\n");
2380 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2385 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2386 req
->StructureSize
= cpu_to_le16(36);
2387 inc_rfc1001_len(req
, 12);
2389 memcpy(req
->LeaseKey
, lease_key
, 16);
2390 req
->LeaseState
= lease_state
;
2392 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2393 /* SMB2 buffer freed by function above */
2396 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2397 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);