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
;
856 unsigned int next
= 0;
859 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
860 lc
= (struct create_lease
*)data_offset
;
862 lc
= (struct create_lease
*)((char *)lc
+ next
);
863 name
= le16_to_cpu(lc
->ccontext
.NameOffset
) + (char *)lc
;
864 if (le16_to_cpu(lc
->ccontext
.NameLength
) != 4 ||
865 strncmp(name
, "RqLs", 4)) {
866 next
= le32_to_cpu(lc
->ccontext
.Next
);
869 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS
)
870 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
878 return smb2_map_lease_to_oplock(lc
->lcontext
.LeaseState
);
882 add_lease_context(struct kvec
*iov
, unsigned int *num_iovec
, __u8
*oplock
)
884 struct smb2_create_req
*req
= iov
[0].iov_base
;
885 unsigned int num
= *num_iovec
;
887 iov
[num
].iov_base
= create_lease_buf(oplock
+1, *oplock
);
888 if (iov
[num
].iov_base
== NULL
)
890 iov
[num
].iov_len
= sizeof(struct create_lease
);
891 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
892 if (!req
->CreateContextsOffset
)
893 req
->CreateContextsOffset
= cpu_to_le32(
894 sizeof(struct smb2_create_req
) - 4 +
895 iov
[num
- 1].iov_len
);
896 req
->CreateContextsLength
= cpu_to_le32(
897 le32_to_cpu(req
->CreateContextsLength
) +
898 sizeof(struct create_lease
));
899 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_lease
));
900 *num_iovec
= num
+ 1;
905 SMB2_open(const unsigned int xid
, struct cifs_tcon
*tcon
, __le16
*path
,
906 u64
*persistent_fid
, u64
*volatile_fid
, __u32 desired_access
,
907 __u32 create_disposition
, __u32 create_options
, __u8
*oplock
,
908 struct smb2_file_all_info
*buf
)
910 struct smb2_create_req
*req
;
911 struct smb2_create_rsp
*rsp
;
912 struct TCP_Server_Info
*server
;
913 struct cifs_ses
*ses
= tcon
->ses
;
917 __le16
*copy_path
= NULL
;
920 unsigned int num_iovecs
= 2;
921 __u32 file_attributes
= 0;
923 cifs_dbg(FYI
, "create/open\n");
925 if (ses
&& (ses
->server
))
926 server
= ses
->server
;
930 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
934 if (create_options
& CREATE_OPTION_READONLY
)
935 file_attributes
|= ATTR_READONLY
;
937 req
->ImpersonationLevel
= IL_IMPERSONATION
;
938 req
->DesiredAccess
= cpu_to_le32(desired_access
);
939 /* File attributes ignored on open (used in create though) */
940 req
->FileAttributes
= cpu_to_le32(file_attributes
);
941 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
942 req
->CreateDisposition
= cpu_to_le32(create_disposition
);
943 req
->CreateOptions
= cpu_to_le32(create_options
& CREATE_OPTIONS_MASK
);
944 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
945 /* do not count rfc1001 len field */
946 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
948 iov
[0].iov_base
= (char *)req
;
949 /* 4 for rfc1002 length field */
950 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
952 /* MUST set path len (NameLength) to 0 opening root of share */
953 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
954 /* -1 since last byte is buf[0] which is sent below (path) */
956 if (uni_path_len
% 8 != 0) {
957 copy_size
= uni_path_len
/ 8 * 8;
958 if (copy_size
< uni_path_len
)
961 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
964 memcpy((char *)copy_path
, (const char *)path
,
966 uni_path_len
= copy_size
;
970 iov
[1].iov_len
= uni_path_len
;
971 iov
[1].iov_base
= path
;
972 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
973 inc_rfc1001_len(req
, uni_path_len
- 1);
975 if (!server
->oplocks
)
976 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
978 if (!(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
979 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
980 req
->RequestedOplockLevel
= *oplock
;
982 rc
= add_lease_context(iov
, &num_iovecs
, oplock
);
984 cifs_small_buf_release(req
);
990 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
991 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
994 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
998 *persistent_fid
= rsp
->PersistentFileId
;
999 *volatile_fid
= rsp
->VolatileFileId
;
1002 memcpy(buf
, &rsp
->CreationTime
, 32);
1003 buf
->AllocationSize
= rsp
->AllocationSize
;
1004 buf
->EndOfFile
= rsp
->EndofFile
;
1005 buf
->Attributes
= rsp
->FileAttributes
;
1006 buf
->NumberOfLinks
= cpu_to_le32(1);
1007 buf
->DeletePending
= 0;
1010 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1011 *oplock
= parse_lease_state(rsp
);
1013 *oplock
= rsp
->OplockLevel
;
1016 free_rsp_buf(resp_buftype
, rsp
);
1021 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1024 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1025 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, char *in_data
,
1026 u32 indatalen
, char **out_data
, u32
*plen
/* returned data len */)
1028 struct smb2_ioctl_req
*req
;
1029 struct smb2_ioctl_rsp
*rsp
;
1030 struct TCP_Server_Info
*server
;
1031 struct cifs_ses
*ses
= tcon
->ses
;
1037 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1039 /* zero out returned data len, in case of error */
1043 if (ses
&& (ses
->server
))
1044 server
= ses
->server
;
1048 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1052 req
->CtlCode
= cpu_to_le32(opcode
);
1053 req
->PersistentFileId
= persistent_fid
;
1054 req
->VolatileFileId
= volatile_fid
;
1057 req
->InputCount
= cpu_to_le32(indatalen
);
1058 /* do not set InputOffset if no input data */
1060 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1061 iov
[1].iov_base
= in_data
;
1062 iov
[1].iov_len
= indatalen
;
1067 req
->OutputOffset
= 0;
1068 req
->OutputCount
= 0; /* MBZ */
1071 * Could increase MaxOutputResponse, but that would require more
1072 * than one credit. Windows typically sets this smaller, but for some
1073 * ioctls it may be useful to allow server to send more. No point
1074 * limiting what the server can send as long as fits in one credit
1076 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1079 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1083 iov
[0].iov_base
= (char *)req
;
1084 /* 4 for rfc1002 length field */
1085 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1088 inc_rfc1001_len(req
, indatalen
);
1090 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1091 rsp
= (struct smb2_ioctl_rsp
*)iov
[0].iov_base
;
1095 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1099 /* check if caller wants to look at return data or just return rc */
1100 if ((plen
== NULL
) || (out_data
== NULL
))
1103 *plen
= le32_to_cpu(rsp
->OutputCount
);
1105 /* We check for obvious errors in the output buffer length and offset */
1107 goto ioctl_exit
; /* server returned no data */
1108 else if (*plen
> 0xFF00) {
1109 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1115 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1116 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1117 le32_to_cpu(rsp
->OutputOffset
));
1123 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1124 if (*out_data
== NULL
) {
1129 memcpy(*out_data
, rsp
->hdr
.ProtocolId
+ le32_to_cpu(rsp
->OutputOffset
),
1132 free_rsp_buf(resp_buftype
, rsp
);
1137 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1138 u64 persistent_fid
, u64 volatile_fid
)
1140 struct smb2_close_req
*req
;
1141 struct smb2_close_rsp
*rsp
;
1142 struct TCP_Server_Info
*server
;
1143 struct cifs_ses
*ses
= tcon
->ses
;
1148 cifs_dbg(FYI
, "Close\n");
1150 if (ses
&& (ses
->server
))
1151 server
= ses
->server
;
1155 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1159 req
->PersistentFileId
= persistent_fid
;
1160 req
->VolatileFileId
= volatile_fid
;
1162 iov
[0].iov_base
= (char *)req
;
1163 /* 4 for rfc1002 length field */
1164 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1166 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1167 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1171 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1175 /* BB FIXME - decode close response, update inode for caching */
1178 free_rsp_buf(resp_buftype
, rsp
);
1183 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1184 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1187 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1188 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1189 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1190 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1193 if (buffer_length
< min_buf_size
) {
1194 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1195 buffer_length
, min_buf_size
);
1199 /* check if beyond RFC1001 maximum length */
1200 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1201 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1202 buffer_length
, smb_len
);
1206 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1207 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1215 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1216 * Caller must free buffer.
1219 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1220 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1224 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1230 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1234 memcpy(data
, begin_of_buf
, buffer_length
);
1240 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1241 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1242 size_t output_len
, size_t min_len
, void *data
)
1244 struct smb2_query_info_req
*req
;
1245 struct smb2_query_info_rsp
*rsp
= NULL
;
1249 struct TCP_Server_Info
*server
;
1250 struct cifs_ses
*ses
= tcon
->ses
;
1252 cifs_dbg(FYI
, "Query Info\n");
1254 if (ses
&& (ses
->server
))
1255 server
= ses
->server
;
1259 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1263 req
->InfoType
= SMB2_O_INFO_FILE
;
1264 req
->FileInfoClass
= info_class
;
1265 req
->PersistentFileId
= persistent_fid
;
1266 req
->VolatileFileId
= volatile_fid
;
1267 /* 4 for rfc1002 length field and 1 for Buffer */
1268 req
->InputBufferOffset
=
1269 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1270 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1272 iov
[0].iov_base
= (char *)req
;
1273 /* 4 for rfc1002 length field */
1274 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1276 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1277 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1280 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1284 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1285 le32_to_cpu(rsp
->OutputBufferLength
),
1286 &rsp
->hdr
, min_len
, data
);
1289 free_rsp_buf(resp_buftype
, rsp
);
1294 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1295 u64 persistent_fid
, u64 volatile_fid
,
1296 struct smb2_file_all_info
*data
)
1298 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1299 FILE_ALL_INFORMATION
,
1300 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1301 sizeof(struct smb2_file_all_info
), data
);
1305 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1306 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1308 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1309 FILE_INTERNAL_INFORMATION
,
1310 sizeof(struct smb2_file_internal_info
),
1311 sizeof(struct smb2_file_internal_info
), uniqueid
);
1315 * This is a no-op for now. We're not really interested in the reply, but
1316 * rather in the fact that the server sent one and that server->lstrp
1319 * FIXME: maybe we should consider checking that the reply matches request?
1322 smb2_echo_callback(struct mid_q_entry
*mid
)
1324 struct TCP_Server_Info
*server
= mid
->callback_data
;
1325 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1326 unsigned int credits_received
= 1;
1328 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1329 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1331 DeleteMidQEntry(mid
);
1332 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1336 SMB2_echo(struct TCP_Server_Info
*server
)
1338 struct smb2_echo_req
*req
;
1341 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1344 cifs_dbg(FYI
, "In echo request\n");
1346 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1350 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1352 iov
.iov_base
= (char *)req
;
1353 /* 4 for rfc1002 length field */
1354 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1356 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1359 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
1361 cifs_small_buf_release(req
);
1366 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1369 struct smb2_flush_req
*req
;
1370 struct TCP_Server_Info
*server
;
1371 struct cifs_ses
*ses
= tcon
->ses
;
1376 cifs_dbg(FYI
, "Flush\n");
1378 if (ses
&& (ses
->server
))
1379 server
= ses
->server
;
1383 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1387 req
->PersistentFileId
= persistent_fid
;
1388 req
->VolatileFileId
= volatile_fid
;
1390 iov
[0].iov_base
= (char *)req
;
1391 /* 4 for rfc1002 length field */
1392 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1394 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1396 if ((rc
!= 0) && tcon
)
1397 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1399 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1404 * To form a chain of read requests, any read requests after the first should
1405 * have the end_of_chain boolean set to true.
1408 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1409 unsigned int remaining_bytes
, int request_type
)
1412 struct smb2_read_req
*req
= NULL
;
1414 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1417 if (io_parms
->tcon
->ses
->server
== NULL
)
1418 return -ECONNABORTED
;
1420 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1422 req
->PersistentFileId
= io_parms
->persistent_fid
;
1423 req
->VolatileFileId
= io_parms
->volatile_fid
;
1424 req
->ReadChannelInfoOffset
= 0; /* reserved */
1425 req
->ReadChannelInfoLength
= 0; /* reserved */
1426 req
->Channel
= 0; /* reserved */
1427 req
->MinimumCount
= 0;
1428 req
->Length
= cpu_to_le32(io_parms
->length
);
1429 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1431 if (request_type
& CHAINED_REQUEST
) {
1432 if (!(request_type
& END_OF_CHAIN
)) {
1433 /* 4 for rfc1002 length field */
1434 req
->hdr
.NextCommand
=
1435 cpu_to_le32(get_rfc1002_length(req
) + 4);
1436 } else /* END_OF_CHAIN */
1437 req
->hdr
.NextCommand
= 0;
1438 if (request_type
& RELATED_REQUEST
) {
1439 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1441 * Related requests use info from previous read request
1444 req
->hdr
.SessionId
= 0xFFFFFFFF;
1445 req
->hdr
.TreeId
= 0xFFFFFFFF;
1446 req
->PersistentFileId
= 0xFFFFFFFF;
1447 req
->VolatileFileId
= 0xFFFFFFFF;
1450 if (remaining_bytes
> io_parms
->length
)
1451 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1453 req
->RemainingBytes
= 0;
1455 iov
[0].iov_base
= (char *)req
;
1456 /* 4 for rfc1002 length field */
1457 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1462 smb2_readv_callback(struct mid_q_entry
*mid
)
1464 struct cifs_readdata
*rdata
= mid
->callback_data
;
1465 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1466 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1467 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1468 unsigned int credits_received
= 1;
1469 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1471 .rq_pages
= rdata
->pages
,
1472 .rq_npages
= rdata
->nr_pages
,
1473 .rq_pagesz
= rdata
->pagesz
,
1474 .rq_tailsz
= rdata
->tailsz
};
1476 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1477 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
1480 switch (mid
->mid_state
) {
1481 case MID_RESPONSE_RECEIVED
:
1482 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1483 /* result already set, check signature */
1487 rc
= smb2_verify_signature(&rqst
, server
);
1489 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
1492 /* FIXME: should this be counted toward the initiating task? */
1493 task_io_account_read(rdata
->bytes
);
1494 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1496 case MID_REQUEST_SUBMITTED
:
1497 case MID_RETRY_NEEDED
:
1498 rdata
->result
= -EAGAIN
;
1501 if (rdata
->result
!= -ENODATA
)
1502 rdata
->result
= -EIO
;
1506 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1508 queue_work(cifsiod_wq
, &rdata
->work
);
1509 DeleteMidQEntry(mid
);
1510 add_credits(server
, credits_received
, 0);
1513 /* smb2_async_readv - send an async write, and set up mid to handle result */
1515 smb2_async_readv(struct cifs_readdata
*rdata
)
1518 struct smb2_hdr
*buf
;
1519 struct cifs_io_parms io_parms
;
1520 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1523 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
1524 __func__
, rdata
->offset
, rdata
->bytes
);
1526 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1527 io_parms
.offset
= rdata
->offset
;
1528 io_parms
.length
= rdata
->bytes
;
1529 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1530 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1531 io_parms
.pid
= rdata
->pid
;
1532 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1536 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1537 /* 4 for rfc1002 length field */
1538 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1540 kref_get(&rdata
->refcount
);
1541 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1542 cifs_readv_receive
, smb2_readv_callback
,
1545 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1546 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1549 cifs_small_buf_release(buf
);
1554 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1555 unsigned int *nbytes
, char **buf
, int *buf_type
)
1557 int resp_buftype
, rc
= -EACCES
;
1558 struct smb2_read_rsp
*rsp
= NULL
;
1562 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1566 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1567 &resp_buftype
, CIFS_LOG_ERROR
);
1569 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1571 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1572 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1577 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1578 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
1580 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1581 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1582 (*nbytes
> io_parms
->length
)) {
1583 cifs_dbg(FYI
, "bad length %d for count %d\n",
1584 *nbytes
, io_parms
->length
);
1591 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1593 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1594 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1595 *buf
= iov
[0].iov_base
;
1596 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1597 *buf_type
= CIFS_SMALL_BUFFER
;
1598 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1599 *buf_type
= CIFS_LARGE_BUFFER
;
1605 * Check the mid_state and signature on received buffer (if any), and queue the
1606 * workqueue completion task.
1609 smb2_writev_callback(struct mid_q_entry
*mid
)
1611 struct cifs_writedata
*wdata
= mid
->callback_data
;
1612 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1613 unsigned int written
;
1614 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1615 unsigned int credits_received
= 1;
1617 switch (mid
->mid_state
) {
1618 case MID_RESPONSE_RECEIVED
:
1619 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1620 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1621 if (wdata
->result
!= 0)
1624 written
= le32_to_cpu(rsp
->DataLength
);
1626 * Mask off high 16 bits when bytes written as returned
1627 * by the server is greater than bytes requested by the
1628 * client. OS/2 servers are known to set incorrect
1631 if (written
> wdata
->bytes
)
1634 if (written
< wdata
->bytes
)
1635 wdata
->result
= -ENOSPC
;
1637 wdata
->bytes
= written
;
1639 case MID_REQUEST_SUBMITTED
:
1640 case MID_RETRY_NEEDED
:
1641 wdata
->result
= -EAGAIN
;
1644 wdata
->result
= -EIO
;
1649 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1651 queue_work(cifsiod_wq
, &wdata
->work
);
1652 DeleteMidQEntry(mid
);
1653 add_credits(tcon
->ses
->server
, credits_received
, 0);
1656 /* smb2_async_writev - send an async write, and set up mid to handle result */
1658 smb2_async_writev(struct cifs_writedata
*wdata
)
1661 struct smb2_write_req
*req
= NULL
;
1662 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1664 struct smb_rqst rqst
;
1666 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1668 goto async_writev_out
;
1670 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1672 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1673 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1674 req
->WriteChannelInfoOffset
= 0;
1675 req
->WriteChannelInfoLength
= 0;
1677 req
->Offset
= cpu_to_le64(wdata
->offset
);
1678 /* 4 for rfc1002 length field */
1679 req
->DataOffset
= cpu_to_le16(
1680 offsetof(struct smb2_write_req
, Buffer
) - 4);
1681 req
->RemainingBytes
= 0;
1683 /* 4 for rfc1002 length field and 1 for Buffer */
1684 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1689 rqst
.rq_pages
= wdata
->pages
;
1690 rqst
.rq_npages
= wdata
->nr_pages
;
1691 rqst
.rq_pagesz
= wdata
->pagesz
;
1692 rqst
.rq_tailsz
= wdata
->tailsz
;
1694 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
1695 wdata
->offset
, wdata
->bytes
);
1697 req
->Length
= cpu_to_le32(wdata
->bytes
);
1699 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1701 kref_get(&wdata
->refcount
);
1702 rc
= cifs_call_async(tcon
->ses
->server
, &rqst
, NULL
,
1703 smb2_writev_callback
, wdata
, 0);
1706 kref_put(&wdata
->refcount
, cifs_writedata_release
);
1707 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1711 cifs_small_buf_release(req
);
1716 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1717 * The length field from io_parms must be at least 1 and indicates a number of
1718 * elements with data to write that begins with position 1 in iov array. All
1719 * data length is specified by count.
1722 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1723 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1726 struct smb2_write_req
*req
= NULL
;
1727 struct smb2_write_rsp
*rsp
= NULL
;
1734 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1738 if (io_parms
->tcon
->ses
->server
== NULL
)
1739 return -ECONNABORTED
;
1741 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1743 req
->PersistentFileId
= io_parms
->persistent_fid
;
1744 req
->VolatileFileId
= io_parms
->volatile_fid
;
1745 req
->WriteChannelInfoOffset
= 0;
1746 req
->WriteChannelInfoLength
= 0;
1748 req
->Length
= cpu_to_le32(io_parms
->length
);
1749 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1750 /* 4 for rfc1002 length field */
1751 req
->DataOffset
= cpu_to_le16(
1752 offsetof(struct smb2_write_req
, Buffer
) - 4);
1753 req
->RemainingBytes
= 0;
1755 iov
[0].iov_base
= (char *)req
;
1756 /* 4 for rfc1002 length field and 1 for Buffer */
1757 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1759 /* length of entire message including data to be written */
1760 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1762 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
1764 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
1767 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
1768 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
1770 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1772 free_rsp_buf(resp_buftype
, rsp
);
1777 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
1780 unsigned int entrycount
= 0;
1781 unsigned int next_offset
= 0;
1782 FILE_DIRECTORY_INFO
*entryptr
;
1784 if (bufstart
== NULL
)
1787 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
1790 entryptr
= (FILE_DIRECTORY_INFO
*)
1791 ((char *)entryptr
+ next_offset
);
1793 if ((char *)entryptr
+ size
> end_of_buf
) {
1794 cifs_dbg(VFS
, "malformed search entry would overflow\n");
1798 len
= le32_to_cpu(entryptr
->FileNameLength
);
1799 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
1800 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
1805 *lastentry
= (char *)entryptr
;
1808 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
1820 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
1821 u64 persistent_fid
, u64 volatile_fid
, int index
,
1822 struct cifs_search_info
*srch_inf
)
1824 struct smb2_query_directory_req
*req
;
1825 struct smb2_query_directory_rsp
*rsp
= NULL
;
1830 unsigned char *bufptr
;
1831 struct TCP_Server_Info
*server
;
1832 struct cifs_ses
*ses
= tcon
->ses
;
1833 __le16 asteriks
= cpu_to_le16('*');
1835 unsigned int output_size
= CIFSMaxBufSize
;
1836 size_t info_buf_size
;
1838 if (ses
&& (ses
->server
))
1839 server
= ses
->server
;
1843 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
1847 switch (srch_inf
->info_level
) {
1848 case SMB_FIND_FILE_DIRECTORY_INFO
:
1849 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
1850 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
1852 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
1853 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
1854 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
1857 cifs_dbg(VFS
, "info level %u isn't supported\n",
1858 srch_inf
->info_level
);
1863 req
->FileIndex
= cpu_to_le32(index
);
1864 req
->PersistentFileId
= persistent_fid
;
1865 req
->VolatileFileId
= volatile_fid
;
1868 bufptr
= req
->Buffer
;
1869 memcpy(bufptr
, &asteriks
, len
);
1871 req
->FileNameOffset
=
1872 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
1873 req
->FileNameLength
= cpu_to_le16(len
);
1875 * BB could be 30 bytes or so longer if we used SMB2 specific
1876 * buffer lengths, but this is safe and close enough.
1878 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
1879 output_size
= min_t(unsigned int, output_size
, 2 << 15);
1880 req
->OutputBufferLength
= cpu_to_le32(output_size
);
1882 iov
[0].iov_base
= (char *)req
;
1883 /* 4 for RFC1001 length and 1 for Buffer */
1884 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1886 iov
[1].iov_base
= (char *)(req
->Buffer
);
1887 iov
[1].iov_len
= len
;
1889 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
1891 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
1892 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
1895 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
1899 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1900 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
1905 srch_inf
->unicode
= true;
1907 if (srch_inf
->ntwrk_buf_start
) {
1908 if (srch_inf
->smallBuf
)
1909 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
1911 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
1913 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
1914 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
1915 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
1916 /* 4 for rfc1002 length field */
1917 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
1918 srch_inf
->entries_in_buffer
=
1919 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
1920 &srch_inf
->last_entry
, info_buf_size
);
1921 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
1922 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
1923 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
1924 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
1925 if (resp_buftype
== CIFS_LARGE_BUFFER
)
1926 srch_inf
->smallBuf
= false;
1927 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
1928 srch_inf
->smallBuf
= true;
1930 cifs_dbg(VFS
, "illegal search buffer type\n");
1932 if (rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
)
1933 srch_inf
->endOfSearch
= 1;
1935 srch_inf
->endOfSearch
= 0;
1940 free_rsp_buf(resp_buftype
, rsp
);
1945 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1946 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
1947 unsigned int num
, void **data
, unsigned int *size
)
1949 struct smb2_set_info_req
*req
;
1950 struct smb2_set_info_rsp
*rsp
= NULL
;
1955 struct TCP_Server_Info
*server
;
1956 struct cifs_ses
*ses
= tcon
->ses
;
1958 if (ses
&& (ses
->server
))
1959 server
= ses
->server
;
1966 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
1970 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
1976 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
1978 req
->InfoType
= SMB2_O_INFO_FILE
;
1979 req
->FileInfoClass
= info_class
;
1980 req
->PersistentFileId
= persistent_fid
;
1981 req
->VolatileFileId
= volatile_fid
;
1983 /* 4 for RFC1001 length and 1 for Buffer */
1985 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
1986 req
->BufferLength
= cpu_to_le32(*size
);
1988 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
1990 memcpy(req
->Buffer
, *data
, *size
);
1992 iov
[0].iov_base
= (char *)req
;
1993 /* 4 for RFC1001 length */
1994 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1996 for (i
= 1; i
< num
; i
++) {
1997 inc_rfc1001_len(req
, size
[i
]);
1998 le32_add_cpu(&req
->BufferLength
, size
[i
]);
1999 iov
[i
].iov_base
= (char *)data
[i
];
2000 iov
[i
].iov_len
= size
[i
];
2003 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
2004 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
2007 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
2011 free_rsp_buf(resp_buftype
, rsp
);
2017 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
2018 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2020 struct smb2_file_rename_info info
;
2022 unsigned int size
[2];
2024 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2026 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2030 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
2031 /* 0 = fail if target already exists */
2032 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2033 info
.FileNameLength
= cpu_to_le32(len
);
2036 size
[0] = sizeof(struct smb2_file_rename_info
);
2038 data
[1] = target_file
;
2039 size
[1] = len
+ 2 /* null */;
2041 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2042 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2049 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2050 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2052 struct smb2_file_link_info info
;
2054 unsigned int size
[2];
2056 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2058 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2062 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2063 /* 0 = fail if link already exists */
2064 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2065 info
.FileNameLength
= cpu_to_le32(len
);
2068 size
[0] = sizeof(struct smb2_file_link_info
);
2070 data
[1] = target_file
;
2071 size
[1] = len
+ 2 /* null */;
2073 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2074 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2080 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2081 u64 volatile_fid
, u32 pid
, __le64
*eof
)
2083 struct smb2_file_eof_info info
;
2087 info
.EndOfFile
= *eof
;
2090 size
= sizeof(struct smb2_file_eof_info
);
2092 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
2093 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2097 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2098 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2101 size
= sizeof(FILE_BASIC_INFO
);
2102 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2103 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2104 (void **)&buf
, &size
);
2108 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2109 const u64 persistent_fid
, const u64 volatile_fid
,
2113 struct smb2_oplock_break
*req
= NULL
;
2115 cifs_dbg(FYI
, "SMB2_oplock_break\n");
2116 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2121 req
->VolatileFid
= volatile_fid
;
2122 req
->PersistentFid
= persistent_fid
;
2123 req
->OplockLevel
= oplock_level
;
2124 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2126 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2127 /* SMB2 buffer freed by function above */
2130 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2131 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
2138 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2139 struct kstatfs
*kst
)
2141 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2142 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2143 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2144 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2145 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2150 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2151 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2154 struct smb2_query_info_req
*req
;
2156 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2158 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2161 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2165 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2166 req
->FileInfoClass
= level
;
2167 req
->PersistentFileId
= persistent_fid
;
2168 req
->VolatileFileId
= volatile_fid
;
2169 /* 4 for rfc1002 length field and 1 for pad */
2170 req
->InputBufferOffset
=
2171 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2172 req
->OutputBufferLength
= cpu_to_le32(
2173 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2175 iov
->iov_base
= (char *)req
;
2176 /* 4 for rfc1002 length field */
2177 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2182 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2183 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2185 struct smb2_query_info_rsp
*rsp
= NULL
;
2189 struct cifs_ses
*ses
= tcon
->ses
;
2190 struct smb2_fs_full_size_info
*info
= NULL
;
2192 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2193 sizeof(struct smb2_fs_full_size_info
),
2194 persistent_fid
, volatile_fid
);
2198 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2200 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2203 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2205 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2206 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2207 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2208 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2209 sizeof(struct smb2_fs_full_size_info
));
2211 copy_fs_info_to_kstatfs(info
, fsdata
);
2214 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2219 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2220 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2221 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2224 struct smb2_lock_req
*req
= NULL
;
2229 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2231 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2235 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2236 req
->LockCount
= cpu_to_le16(num_lock
);
2238 req
->PersistentFileId
= persist_fid
;
2239 req
->VolatileFileId
= volatile_fid
;
2241 count
= num_lock
* sizeof(struct smb2_lock_element
);
2242 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2244 iov
[0].iov_base
= (char *)req
;
2245 /* 4 for rfc1002 length field and count for all locks */
2246 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2247 iov
[1].iov_base
= (char *)buf
;
2248 iov
[1].iov_len
= count
;
2250 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2251 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2253 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2254 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2261 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2262 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2263 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2266 struct smb2_lock_element lock
;
2268 lock
.Offset
= cpu_to_le64(offset
);
2269 lock
.Length
= cpu_to_le64(length
);
2270 lock
.Flags
= cpu_to_le32(lock_flags
);
2271 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2272 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2274 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2278 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2279 __u8
*lease_key
, const __le32 lease_state
)
2282 struct smb2_lease_ack
*req
= NULL
;
2284 cifs_dbg(FYI
, "SMB2_lease_break\n");
2285 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2290 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2291 req
->StructureSize
= cpu_to_le16(36);
2292 inc_rfc1001_len(req
, 12);
2294 memcpy(req
->LeaseKey
, lease_key
, 16);
2295 req
->LeaseState
= lease_state
;
2297 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2298 /* SMB2 buffer freed by function above */
2301 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2302 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);