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 /* set it to the maximum buffer size value we can send with 1 credit */
417 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
418 SMB2_MAX_BUFFER_SIZE
);
419 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
420 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
421 /* BB Do we need to validate the SecurityMode? */
422 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
423 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
425 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
427 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
430 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
432 * ses->sectype = RawNTLMSSP;
433 * but for time being this is our only auth choice so doesn't matter.
434 * We just found a server which sets blob length to zero expecting raw.
436 if (blob_length
== 0)
437 cifs_dbg(FYI
, "missing security blob on negprot\n");
439 rc
= cifs_enable_signing(server
, ses
->sign
);
440 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
444 rc
= decode_neg_token_init(security_blob
, blob_length
,
455 free_rsp_buf(resp_buftype
, rsp
);
459 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
462 struct validate_negotiate_info_req vneg_inbuf
;
463 struct validate_negotiate_info_rsp
*pneg_rsp
;
466 cifs_dbg(FYI
, "validate negotiate\n");
469 * validation ioctl must be signed, so no point sending this if we
470 * can not sign it. We could eventually change this to selectively
471 * sign just this, the first and only signed request on a connection.
472 * This is good enough for now since a user who wants better security
473 * would also enable signing on the mount. Having validation of
474 * negotiate info for signed connections helps reduce attack vectors
476 if (tcon
->ses
->server
->sign
== false)
477 return 0; /* validation requires signing */
479 vneg_inbuf
.Capabilities
=
480 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
481 memcpy(vneg_inbuf
.Guid
, cifs_client_guid
, SMB2_CLIENT_GUID_SIZE
);
484 vneg_inbuf
.SecurityMode
=
485 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
486 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
487 vneg_inbuf
.SecurityMode
=
488 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
490 vneg_inbuf
.SecurityMode
= 0;
492 vneg_inbuf
.DialectCount
= cpu_to_le16(1);
493 vneg_inbuf
.Dialects
[0] =
494 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
496 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
497 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
498 (char *)&vneg_inbuf
, sizeof(struct validate_negotiate_info_req
),
499 (char **)&pneg_rsp
, &rsplen
);
502 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
506 if (rsplen
!= sizeof(struct validate_negotiate_info_rsp
)) {
507 cifs_dbg(VFS
, "invalid size of protocol negotiate response\n");
511 /* check validate negotiate info response matches what we got earlier */
512 if (pneg_rsp
->Dialect
!=
513 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
))
516 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
519 /* do not validate server guid because not saved at negprot time yet */
521 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
522 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
525 /* validate negotiate successful */
526 cifs_dbg(FYI
, "validate negotiate info successful\n");
530 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
535 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
536 const struct nls_table
*nls_cp
)
538 struct smb2_sess_setup_req
*req
;
539 struct smb2_sess_setup_rsp
*rsp
= NULL
;
543 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
544 struct TCP_Server_Info
*server
= ses
->server
;
547 char *ntlmssp_blob
= NULL
;
548 bool use_spnego
= false; /* else use raw ntlmssp */
550 cifs_dbg(FYI
, "Session Setup\n");
553 WARN(1, "%s: server is NULL!\n", __func__
);
558 * If we are here due to reconnect, free per-smb session key
559 * in case signing was required.
561 kfree(ses
->auth_key
.response
);
562 ses
->auth_key
.response
= NULL
;
565 * If memory allocation is successful, caller of this function
568 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
571 ses
->ntlmssp
->sesskey_per_smbsess
= true;
573 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
574 ses
->sectype
= RawNTLMSSP
;
576 ssetup_ntlmssp_authenticate
:
577 if (phase
== NtLmChallenge
)
578 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
580 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
584 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
585 req
->VcNumber
= 0; /* MBZ */
586 /* to enable echos and oplocks */
587 req
->hdr
.CreditRequest
= cpu_to_le16(3);
589 /* only one of SMB2 signing flags may be set in SMB2 request */
591 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
592 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
593 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
595 req
->SecurityMode
= 0;
597 req
->Capabilities
= 0;
598 req
->Channel
= 0; /* MBZ */
600 iov
[0].iov_base
= (char *)req
;
601 /* 4 for rfc1002 length field and 1 for pad */
602 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
603 if (phase
== NtLmNegotiate
) {
604 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
606 if (ntlmssp_blob
== NULL
) {
610 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
612 /* blob_length = build_spnego_ntlmssp_blob(
614 sizeof(struct _NEGOTIATE_MESSAGE),
616 /* BB eventually need to add this */
617 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
622 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
623 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
624 security_blob
= ntlmssp_blob
;
626 } else if (phase
== NtLmAuthenticate
) {
627 req
->hdr
.SessionId
= ses
->Suid
;
628 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
630 if (ntlmssp_blob
== NULL
) {
634 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
637 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n",
639 goto ssetup_exit
; /* BB double check error handling */
642 /* blob_length = build_spnego_ntlmssp_blob(
646 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
651 security_blob
= ntlmssp_blob
;
654 cifs_dbg(VFS
, "illegal ntlmssp phase\n");
659 /* Testing shows that buffer offset must be at location of Buffer[0] */
660 req
->SecurityBufferOffset
=
661 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
662 1 /* pad */ - 4 /* rfc1001 len */);
663 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
664 iov
[1].iov_base
= security_blob
;
665 iov
[1].iov_len
= blob_length
;
667 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
669 /* BB add code to build os and lm fields */
671 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
,
672 CIFS_LOG_ERROR
| CIFS_NEG_OP
);
674 kfree(security_blob
);
675 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
676 if (resp_buftype
!= CIFS_NO_BUFFER
&&
677 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
678 if (phase
!= NtLmNegotiate
) {
679 cifs_dbg(VFS
, "Unexpected more processing error\n");
682 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
683 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
684 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
685 le16_to_cpu(rsp
->SecurityBufferOffset
));
690 /* NTLMSSP Negotiate sent now processing challenge (response) */
691 phase
= NtLmChallenge
; /* process ntlmssp challenge */
692 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
693 ses
->Suid
= rsp
->hdr
.SessionId
;
694 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
695 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
699 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
700 * but at least the raw NTLMSSP case works.
703 * No tcon so can't do
704 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
709 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
710 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
711 cifs_dbg(VFS
, "SMB3 encryption not supported yet\n");
713 free_rsp_buf(resp_buftype
, rsp
);
715 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
716 if ((phase
== NtLmChallenge
) && (rc
== 0))
717 goto ssetup_ntlmssp_authenticate
;
720 mutex_lock(&server
->srv_mutex
);
721 if (server
->sign
&& server
->ops
->generate_signingkey
) {
722 rc
= server
->ops
->generate_signingkey(ses
);
723 kfree(ses
->auth_key
.response
);
724 ses
->auth_key
.response
= NULL
;
727 "SMB3 session key generation failed\n");
728 mutex_unlock(&server
->srv_mutex
);
732 if (!server
->session_estab
) {
733 server
->sequence_number
= 0x2;
734 server
->session_estab
= true;
736 mutex_unlock(&server
->srv_mutex
);
738 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
739 spin_lock(&GlobalMid_Lock
);
740 ses
->status
= CifsGood
;
741 ses
->need_reconnect
= false;
742 spin_unlock(&GlobalMid_Lock
);
747 kfree(ses
->auth_key
.response
);
748 ses
->auth_key
.response
= NULL
;
756 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
758 struct smb2_logoff_req
*req
; /* response is also trivial struct */
760 struct TCP_Server_Info
*server
;
762 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
764 if (ses
&& (ses
->server
))
765 server
= ses
->server
;
769 /* no need to send SMB logoff if uid already closed due to reconnect */
770 if (ses
->need_reconnect
)
771 goto smb2_session_already_dead
;
773 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
777 /* since no tcon, smb2_init can not do this, so do here */
778 req
->hdr
.SessionId
= ses
->Suid
;
780 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
782 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
784 * No tcon so can't do
785 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
788 smb2_session_already_dead
:
792 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
794 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
797 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
799 /* These are similar values to what Windows uses */
800 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
802 tcon
->max_chunks
= 256;
803 tcon
->max_bytes_chunk
= 1048576;
804 tcon
->max_bytes_copy
= 16777216;
808 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
809 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
811 struct smb2_tree_connect_req
*req
;
812 struct smb2_tree_connect_rsp
*rsp
= NULL
;
817 struct TCP_Server_Info
*server
;
818 __le16
*unc_path
= NULL
;
820 cifs_dbg(FYI
, "TCON\n");
822 if ((ses
->server
) && tree
)
823 server
= ses
->server
;
827 if (tcon
&& tcon
->bad_network_name
)
830 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
831 if (unc_path
== NULL
)
834 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
836 if (unc_path_len
< 2) {
841 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
848 /* since no tcon, smb2_init can not do this, so do here */
849 req
->hdr
.SessionId
= ses
->Suid
;
850 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
851 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
854 iov
[0].iov_base
= (char *)req
;
855 /* 4 for rfc1002 length field and 1 for pad */
856 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
858 /* Testing shows that buffer offset must be at location of Buffer[0] */
859 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
860 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
861 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
862 iov
[1].iov_base
= unc_path
;
863 iov
[1].iov_len
= unc_path_len
;
865 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
867 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
868 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
872 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
873 tcon
->need_reconnect
= true;
875 goto tcon_error_exit
;
879 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
883 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
884 cifs_dbg(FYI
, "connection to disk share\n");
885 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
887 cifs_dbg(FYI
, "connection to pipe share\n");
888 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
890 cifs_dbg(FYI
, "connection to printer\n");
892 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
894 goto tcon_error_exit
;
897 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
898 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
899 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
900 tcon
->tidStatus
= CifsGood
;
901 tcon
->need_reconnect
= false;
902 tcon
->tid
= rsp
->hdr
.TreeId
;
903 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
905 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
906 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
907 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
908 init_copy_chunk_defaults(tcon
);
909 if (tcon
->ses
->server
->ops
->validate_negotiate
)
910 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
912 free_rsp_buf(resp_buftype
, rsp
);
917 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
918 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
919 tcon
->bad_network_name
= true;
925 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
927 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
929 struct TCP_Server_Info
*server
;
930 struct cifs_ses
*ses
= tcon
->ses
;
932 cifs_dbg(FYI
, "Tree Disconnect\n");
934 if (ses
&& (ses
->server
))
935 server
= ses
->server
;
939 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
942 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
946 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
948 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
954 static struct create_durable
*
955 create_durable_buf(void)
957 struct create_durable
*buf
;
959 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
963 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
964 (struct create_durable
, Data
));
965 buf
->ccontext
.DataLength
= cpu_to_le32(16);
966 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
967 (struct create_durable
, Name
));
968 buf
->ccontext
.NameLength
= cpu_to_le16(4);
976 static struct create_durable
*
977 create_reconnect_durable_buf(struct cifs_fid
*fid
)
979 struct create_durable
*buf
;
981 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
985 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
986 (struct create_durable
, Data
));
987 buf
->ccontext
.DataLength
= cpu_to_le32(16);
988 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
989 (struct create_durable
, Name
));
990 buf
->ccontext
.NameLength
= cpu_to_le16(4);
991 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
992 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1001 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1002 unsigned int *epoch
)
1005 struct create_context
*cc
;
1006 unsigned int next
= 0;
1009 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
1010 cc
= (struct create_context
*)data_offset
;
1012 cc
= (struct create_context
*)((char *)cc
+ next
);
1013 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1014 if (le16_to_cpu(cc
->NameLength
) != 4 ||
1015 strncmp(name
, "RqLs", 4)) {
1016 next
= le32_to_cpu(cc
->Next
);
1019 return server
->ops
->parse_lease_buf(cc
, epoch
);
1020 } while (next
!= 0);
1026 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1027 unsigned int *num_iovec
, __u8
*oplock
)
1029 struct smb2_create_req
*req
= iov
[0].iov_base
;
1030 unsigned int num
= *num_iovec
;
1032 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1033 if (iov
[num
].iov_base
== NULL
)
1035 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1036 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1037 if (!req
->CreateContextsOffset
)
1038 req
->CreateContextsOffset
= cpu_to_le32(
1039 sizeof(struct smb2_create_req
) - 4 +
1040 iov
[num
- 1].iov_len
);
1041 le32_add_cpu(&req
->CreateContextsLength
,
1042 server
->vals
->create_lease_size
);
1043 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
1044 *num_iovec
= num
+ 1;
1049 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1050 struct cifs_open_parms
*oparms
)
1052 struct smb2_create_req
*req
= iov
[0].iov_base
;
1053 unsigned int num
= *num_iovec
;
1055 if (oparms
->reconnect
) {
1056 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1057 /* indicate that we don't need to relock the file */
1058 oparms
->reconnect
= false;
1060 iov
[num
].iov_base
= create_durable_buf();
1061 if (iov
[num
].iov_base
== NULL
)
1063 iov
[num
].iov_len
= sizeof(struct create_durable
);
1064 if (!req
->CreateContextsOffset
)
1065 req
->CreateContextsOffset
=
1066 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1068 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1069 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
1070 *num_iovec
= num
+ 1;
1075 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1076 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1077 struct smb2_err_rsp
**err_buf
)
1079 struct smb2_create_req
*req
;
1080 struct smb2_create_rsp
*rsp
;
1081 struct TCP_Server_Info
*server
;
1082 struct cifs_tcon
*tcon
= oparms
->tcon
;
1083 struct cifs_ses
*ses
= tcon
->ses
;
1087 __le16
*copy_path
= NULL
;
1090 unsigned int num_iovecs
= 2;
1091 __u32 file_attributes
= 0;
1093 cifs_dbg(FYI
, "create/open\n");
1095 if (ses
&& (ses
->server
))
1096 server
= ses
->server
;
1100 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1104 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1105 file_attributes
|= ATTR_READONLY
;
1107 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1108 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1109 /* File attributes ignored on open (used in create though) */
1110 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1111 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1112 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1113 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1114 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1115 /* do not count rfc1001 len field */
1116 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
1118 iov
[0].iov_base
= (char *)req
;
1119 /* 4 for rfc1002 length field */
1120 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1122 /* MUST set path len (NameLength) to 0 opening root of share */
1123 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1124 /* -1 since last byte is buf[0] which is sent below (path) */
1126 if (uni_path_len
% 8 != 0) {
1127 copy_size
= uni_path_len
/ 8 * 8;
1128 if (copy_size
< uni_path_len
)
1131 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1134 memcpy((char *)copy_path
, (const char *)path
,
1136 uni_path_len
= copy_size
;
1140 iov
[1].iov_len
= uni_path_len
;
1141 iov
[1].iov_base
= path
;
1142 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1143 inc_rfc1001_len(req
, uni_path_len
- 1);
1145 if (!server
->oplocks
)
1146 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1148 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1149 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1150 req
->RequestedOplockLevel
= *oplock
;
1152 rc
= add_lease_context(server
, iov
, &num_iovecs
, oplock
);
1154 cifs_small_buf_release(req
);
1160 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1161 /* need to set Next field of lease context if we request it */
1162 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
1163 struct create_context
*ccontext
=
1164 (struct create_context
*)iov
[num_iovecs
-1].iov_base
;
1166 cpu_to_le32(server
->vals
->create_lease_size
);
1168 rc
= add_durable_context(iov
, &num_iovecs
, oparms
);
1170 cifs_small_buf_release(req
);
1172 kfree(iov
[num_iovecs
-1].iov_base
);
1177 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1178 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
1181 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1183 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1188 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1189 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1192 memcpy(buf
, &rsp
->CreationTime
, 32);
1193 buf
->AllocationSize
= rsp
->AllocationSize
;
1194 buf
->EndOfFile
= rsp
->EndofFile
;
1195 buf
->Attributes
= rsp
->FileAttributes
;
1196 buf
->NumberOfLinks
= cpu_to_le32(1);
1197 buf
->DeletePending
= 0;
1200 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1201 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1203 *oplock
= rsp
->OplockLevel
;
1206 free_rsp_buf(resp_buftype
, rsp
);
1211 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1214 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1215 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, char *in_data
,
1216 u32 indatalen
, char **out_data
, u32
*plen
/* returned data len */)
1218 struct smb2_ioctl_req
*req
;
1219 struct smb2_ioctl_rsp
*rsp
;
1220 struct TCP_Server_Info
*server
;
1221 struct cifs_ses
*ses
= tcon
->ses
;
1227 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1230 /* zero out returned data len, in case of error */
1234 if (ses
&& (ses
->server
))
1235 server
= ses
->server
;
1239 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1243 req
->CtlCode
= cpu_to_le32(opcode
);
1244 req
->PersistentFileId
= persistent_fid
;
1245 req
->VolatileFileId
= volatile_fid
;
1248 req
->InputCount
= cpu_to_le32(indatalen
);
1249 /* do not set InputOffset if no input data */
1251 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1252 iov
[1].iov_base
= in_data
;
1253 iov
[1].iov_len
= indatalen
;
1258 req
->OutputOffset
= 0;
1259 req
->OutputCount
= 0; /* MBZ */
1262 * Could increase MaxOutputResponse, but that would require more
1263 * than one credit. Windows typically sets this smaller, but for some
1264 * ioctls it may be useful to allow server to send more. No point
1265 * limiting what the server can send as long as fits in one credit
1267 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1270 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1274 iov
[0].iov_base
= (char *)req
;
1277 * If no input data, the size of ioctl struct in
1278 * protocol spec still includes a 1 byte data buffer,
1279 * but if input data passed to ioctl, we do not
1280 * want to double count this, so we do not send
1281 * the dummy one byte of data in iovec[0] if sending
1282 * input data (in iovec[1]). We also must add 4 bytes
1283 * in first iovec to allow for rfc1002 length field.
1287 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1288 inc_rfc1001_len(req
, indatalen
- 1);
1290 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1293 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1294 rsp
= (struct smb2_ioctl_rsp
*)iov
[0].iov_base
;
1296 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
1298 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1300 } else if (rc
== -EINVAL
) {
1301 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
1302 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
1304 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1309 /* check if caller wants to look at return data or just return rc */
1310 if ((plen
== NULL
) || (out_data
== NULL
))
1313 *plen
= le32_to_cpu(rsp
->OutputCount
);
1315 /* We check for obvious errors in the output buffer length and offset */
1317 goto ioctl_exit
; /* server returned no data */
1318 else if (*plen
> 0xFF00) {
1319 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1325 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1326 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1327 le32_to_cpu(rsp
->OutputOffset
));
1333 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1334 if (*out_data
== NULL
) {
1339 memcpy(*out_data
, rsp
->hdr
.ProtocolId
+ le32_to_cpu(rsp
->OutputOffset
),
1342 free_rsp_buf(resp_buftype
, rsp
);
1347 * Individual callers to ioctl worker function follow
1351 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
1352 u64 persistent_fid
, u64 volatile_fid
)
1355 char *res_key
= NULL
;
1356 struct compress_ioctl fsctl_input
;
1357 char *ret_data
= NULL
;
1359 fsctl_input
.CompressionState
=
1360 __constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
1362 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
1363 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
1364 (char *)&fsctl_input
/* data input */,
1365 2 /* in data len */, &ret_data
/* out data */, NULL
);
1367 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
1374 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1375 u64 persistent_fid
, u64 volatile_fid
)
1377 struct smb2_close_req
*req
;
1378 struct smb2_close_rsp
*rsp
;
1379 struct TCP_Server_Info
*server
;
1380 struct cifs_ses
*ses
= tcon
->ses
;
1385 cifs_dbg(FYI
, "Close\n");
1387 if (ses
&& (ses
->server
))
1388 server
= ses
->server
;
1392 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1396 req
->PersistentFileId
= persistent_fid
;
1397 req
->VolatileFileId
= volatile_fid
;
1399 iov
[0].iov_base
= (char *)req
;
1400 /* 4 for rfc1002 length field */
1401 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1403 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1404 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1408 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1412 /* BB FIXME - decode close response, update inode for caching */
1415 free_rsp_buf(resp_buftype
, rsp
);
1420 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1421 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1424 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1425 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1426 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1427 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1430 if (buffer_length
< min_buf_size
) {
1431 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1432 buffer_length
, min_buf_size
);
1436 /* check if beyond RFC1001 maximum length */
1437 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1438 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1439 buffer_length
, smb_len
);
1443 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1444 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1452 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1453 * Caller must free buffer.
1456 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1457 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1461 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1467 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1471 memcpy(data
, begin_of_buf
, buffer_length
);
1477 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1478 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1479 size_t output_len
, size_t min_len
, void *data
)
1481 struct smb2_query_info_req
*req
;
1482 struct smb2_query_info_rsp
*rsp
= NULL
;
1486 struct TCP_Server_Info
*server
;
1487 struct cifs_ses
*ses
= tcon
->ses
;
1489 cifs_dbg(FYI
, "Query Info\n");
1491 if (ses
&& (ses
->server
))
1492 server
= ses
->server
;
1496 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1500 req
->InfoType
= SMB2_O_INFO_FILE
;
1501 req
->FileInfoClass
= info_class
;
1502 req
->PersistentFileId
= persistent_fid
;
1503 req
->VolatileFileId
= volatile_fid
;
1504 /* 4 for rfc1002 length field and 1 for Buffer */
1505 req
->InputBufferOffset
=
1506 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1507 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1509 iov
[0].iov_base
= (char *)req
;
1510 /* 4 for rfc1002 length field */
1511 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1513 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1514 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1517 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1521 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1522 le32_to_cpu(rsp
->OutputBufferLength
),
1523 &rsp
->hdr
, min_len
, data
);
1526 free_rsp_buf(resp_buftype
, rsp
);
1531 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1532 u64 persistent_fid
, u64 volatile_fid
,
1533 struct smb2_file_all_info
*data
)
1535 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1536 FILE_ALL_INFORMATION
,
1537 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1538 sizeof(struct smb2_file_all_info
), data
);
1542 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1543 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1545 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1546 FILE_INTERNAL_INFORMATION
,
1547 sizeof(struct smb2_file_internal_info
),
1548 sizeof(struct smb2_file_internal_info
), uniqueid
);
1552 * This is a no-op for now. We're not really interested in the reply, but
1553 * rather in the fact that the server sent one and that server->lstrp
1556 * FIXME: maybe we should consider checking that the reply matches request?
1559 smb2_echo_callback(struct mid_q_entry
*mid
)
1561 struct TCP_Server_Info
*server
= mid
->callback_data
;
1562 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1563 unsigned int credits_received
= 1;
1565 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1566 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1568 DeleteMidQEntry(mid
);
1569 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1573 SMB2_echo(struct TCP_Server_Info
*server
)
1575 struct smb2_echo_req
*req
;
1578 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1581 cifs_dbg(FYI
, "In echo request\n");
1583 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1587 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1589 iov
.iov_base
= (char *)req
;
1590 /* 4 for rfc1002 length field */
1591 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1593 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1596 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
1598 cifs_small_buf_release(req
);
1603 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1606 struct smb2_flush_req
*req
;
1607 struct TCP_Server_Info
*server
;
1608 struct cifs_ses
*ses
= tcon
->ses
;
1613 cifs_dbg(FYI
, "Flush\n");
1615 if (ses
&& (ses
->server
))
1616 server
= ses
->server
;
1620 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1624 req
->PersistentFileId
= persistent_fid
;
1625 req
->VolatileFileId
= volatile_fid
;
1627 iov
[0].iov_base
= (char *)req
;
1628 /* 4 for rfc1002 length field */
1629 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1631 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1633 if ((rc
!= 0) && tcon
)
1634 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1636 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1641 * To form a chain of read requests, any read requests after the first should
1642 * have the end_of_chain boolean set to true.
1645 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1646 unsigned int remaining_bytes
, int request_type
)
1649 struct smb2_read_req
*req
= NULL
;
1651 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1654 if (io_parms
->tcon
->ses
->server
== NULL
)
1655 return -ECONNABORTED
;
1657 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1659 req
->PersistentFileId
= io_parms
->persistent_fid
;
1660 req
->VolatileFileId
= io_parms
->volatile_fid
;
1661 req
->ReadChannelInfoOffset
= 0; /* reserved */
1662 req
->ReadChannelInfoLength
= 0; /* reserved */
1663 req
->Channel
= 0; /* reserved */
1664 req
->MinimumCount
= 0;
1665 req
->Length
= cpu_to_le32(io_parms
->length
);
1666 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1668 if (request_type
& CHAINED_REQUEST
) {
1669 if (!(request_type
& END_OF_CHAIN
)) {
1670 /* 4 for rfc1002 length field */
1671 req
->hdr
.NextCommand
=
1672 cpu_to_le32(get_rfc1002_length(req
) + 4);
1673 } else /* END_OF_CHAIN */
1674 req
->hdr
.NextCommand
= 0;
1675 if (request_type
& RELATED_REQUEST
) {
1676 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1678 * Related requests use info from previous read request
1681 req
->hdr
.SessionId
= 0xFFFFFFFF;
1682 req
->hdr
.TreeId
= 0xFFFFFFFF;
1683 req
->PersistentFileId
= 0xFFFFFFFF;
1684 req
->VolatileFileId
= 0xFFFFFFFF;
1687 if (remaining_bytes
> io_parms
->length
)
1688 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1690 req
->RemainingBytes
= 0;
1692 iov
[0].iov_base
= (char *)req
;
1693 /* 4 for rfc1002 length field */
1694 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1699 smb2_readv_callback(struct mid_q_entry
*mid
)
1701 struct cifs_readdata
*rdata
= mid
->callback_data
;
1702 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1703 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1704 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1705 unsigned int credits_received
= 1;
1706 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1708 .rq_pages
= rdata
->pages
,
1709 .rq_npages
= rdata
->nr_pages
,
1710 .rq_pagesz
= rdata
->pagesz
,
1711 .rq_tailsz
= rdata
->tailsz
};
1713 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1714 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
1717 switch (mid
->mid_state
) {
1718 case MID_RESPONSE_RECEIVED
:
1719 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1720 /* result already set, check signature */
1724 rc
= smb2_verify_signature(&rqst
, server
);
1726 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
1729 /* FIXME: should this be counted toward the initiating task? */
1730 task_io_account_read(rdata
->bytes
);
1731 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1733 case MID_REQUEST_SUBMITTED
:
1734 case MID_RETRY_NEEDED
:
1735 rdata
->result
= -EAGAIN
;
1738 if (rdata
->result
!= -ENODATA
)
1739 rdata
->result
= -EIO
;
1743 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1745 queue_work(cifsiod_wq
, &rdata
->work
);
1746 DeleteMidQEntry(mid
);
1747 add_credits(server
, credits_received
, 0);
1750 /* smb2_async_readv - send an async write, and set up mid to handle result */
1752 smb2_async_readv(struct cifs_readdata
*rdata
)
1755 struct smb2_hdr
*buf
;
1756 struct cifs_io_parms io_parms
;
1757 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1760 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
1761 __func__
, rdata
->offset
, rdata
->bytes
);
1763 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1764 io_parms
.offset
= rdata
->offset
;
1765 io_parms
.length
= rdata
->bytes
;
1766 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1767 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1768 io_parms
.pid
= rdata
->pid
;
1769 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1773 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1774 /* 4 for rfc1002 length field */
1775 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1777 kref_get(&rdata
->refcount
);
1778 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1779 cifs_readv_receive
, smb2_readv_callback
,
1782 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1783 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1786 cifs_small_buf_release(buf
);
1791 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1792 unsigned int *nbytes
, char **buf
, int *buf_type
)
1794 int resp_buftype
, rc
= -EACCES
;
1795 struct smb2_read_rsp
*rsp
= NULL
;
1799 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1803 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1804 &resp_buftype
, CIFS_LOG_ERROR
);
1806 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1808 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1809 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1814 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1815 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
1817 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1818 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1819 (*nbytes
> io_parms
->length
)) {
1820 cifs_dbg(FYI
, "bad length %d for count %d\n",
1821 *nbytes
, io_parms
->length
);
1828 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1830 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1831 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1832 *buf
= iov
[0].iov_base
;
1833 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1834 *buf_type
= CIFS_SMALL_BUFFER
;
1835 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1836 *buf_type
= CIFS_LARGE_BUFFER
;
1842 * Check the mid_state and signature on received buffer (if any), and queue the
1843 * workqueue completion task.
1846 smb2_writev_callback(struct mid_q_entry
*mid
)
1848 struct cifs_writedata
*wdata
= mid
->callback_data
;
1849 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1850 unsigned int written
;
1851 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1852 unsigned int credits_received
= 1;
1854 switch (mid
->mid_state
) {
1855 case MID_RESPONSE_RECEIVED
:
1856 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1857 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1858 if (wdata
->result
!= 0)
1861 written
= le32_to_cpu(rsp
->DataLength
);
1863 * Mask off high 16 bits when bytes written as returned
1864 * by the server is greater than bytes requested by the
1865 * client. OS/2 servers are known to set incorrect
1868 if (written
> wdata
->bytes
)
1871 if (written
< wdata
->bytes
)
1872 wdata
->result
= -ENOSPC
;
1874 wdata
->bytes
= written
;
1876 case MID_REQUEST_SUBMITTED
:
1877 case MID_RETRY_NEEDED
:
1878 wdata
->result
= -EAGAIN
;
1881 wdata
->result
= -EIO
;
1886 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1888 queue_work(cifsiod_wq
, &wdata
->work
);
1889 DeleteMidQEntry(mid
);
1890 add_credits(tcon
->ses
->server
, credits_received
, 0);
1893 /* smb2_async_writev - send an async write, and set up mid to handle result */
1895 smb2_async_writev(struct cifs_writedata
*wdata
,
1896 void (*release
)(struct kref
*kref
))
1899 struct smb2_write_req
*req
= NULL
;
1900 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1902 struct smb_rqst rqst
;
1904 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1906 goto async_writev_out
;
1908 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1910 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1911 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1912 req
->WriteChannelInfoOffset
= 0;
1913 req
->WriteChannelInfoLength
= 0;
1915 req
->Offset
= cpu_to_le64(wdata
->offset
);
1916 /* 4 for rfc1002 length field */
1917 req
->DataOffset
= cpu_to_le16(
1918 offsetof(struct smb2_write_req
, Buffer
) - 4);
1919 req
->RemainingBytes
= 0;
1921 /* 4 for rfc1002 length field and 1 for Buffer */
1922 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1927 rqst
.rq_pages
= wdata
->pages
;
1928 rqst
.rq_npages
= wdata
->nr_pages
;
1929 rqst
.rq_pagesz
= wdata
->pagesz
;
1930 rqst
.rq_tailsz
= wdata
->tailsz
;
1932 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
1933 wdata
->offset
, wdata
->bytes
);
1935 req
->Length
= cpu_to_le32(wdata
->bytes
);
1937 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1939 kref_get(&wdata
->refcount
);
1940 rc
= cifs_call_async(tcon
->ses
->server
, &rqst
, NULL
,
1941 smb2_writev_callback
, wdata
, 0);
1944 kref_put(&wdata
->refcount
, release
);
1945 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1949 cifs_small_buf_release(req
);
1954 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1955 * The length field from io_parms must be at least 1 and indicates a number of
1956 * elements with data to write that begins with position 1 in iov array. All
1957 * data length is specified by count.
1960 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1961 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1964 struct smb2_write_req
*req
= NULL
;
1965 struct smb2_write_rsp
*rsp
= NULL
;
1972 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1976 if (io_parms
->tcon
->ses
->server
== NULL
)
1977 return -ECONNABORTED
;
1979 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1981 req
->PersistentFileId
= io_parms
->persistent_fid
;
1982 req
->VolatileFileId
= io_parms
->volatile_fid
;
1983 req
->WriteChannelInfoOffset
= 0;
1984 req
->WriteChannelInfoLength
= 0;
1986 req
->Length
= cpu_to_le32(io_parms
->length
);
1987 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1988 /* 4 for rfc1002 length field */
1989 req
->DataOffset
= cpu_to_le16(
1990 offsetof(struct smb2_write_req
, Buffer
) - 4);
1991 req
->RemainingBytes
= 0;
1993 iov
[0].iov_base
= (char *)req
;
1994 /* 4 for rfc1002 length field and 1 for Buffer */
1995 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1997 /* length of entire message including data to be written */
1998 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
2000 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
2002 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
2005 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
2006 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
2008 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2010 free_rsp_buf(resp_buftype
, rsp
);
2015 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
2018 unsigned int entrycount
= 0;
2019 unsigned int next_offset
= 0;
2020 FILE_DIRECTORY_INFO
*entryptr
;
2022 if (bufstart
== NULL
)
2025 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
2028 entryptr
= (FILE_DIRECTORY_INFO
*)
2029 ((char *)entryptr
+ next_offset
);
2031 if ((char *)entryptr
+ size
> end_of_buf
) {
2032 cifs_dbg(VFS
, "malformed search entry would overflow\n");
2036 len
= le32_to_cpu(entryptr
->FileNameLength
);
2037 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
2038 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
2043 *lastentry
= (char *)entryptr
;
2046 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
2058 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
2059 u64 persistent_fid
, u64 volatile_fid
, int index
,
2060 struct cifs_search_info
*srch_inf
)
2062 struct smb2_query_directory_req
*req
;
2063 struct smb2_query_directory_rsp
*rsp
= NULL
;
2068 unsigned char *bufptr
;
2069 struct TCP_Server_Info
*server
;
2070 struct cifs_ses
*ses
= tcon
->ses
;
2071 __le16 asteriks
= cpu_to_le16('*');
2073 unsigned int output_size
= CIFSMaxBufSize
;
2074 size_t info_buf_size
;
2076 if (ses
&& (ses
->server
))
2077 server
= ses
->server
;
2081 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
2085 switch (srch_inf
->info_level
) {
2086 case SMB_FIND_FILE_DIRECTORY_INFO
:
2087 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
2088 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
2090 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
2091 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
2092 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
2095 cifs_dbg(VFS
, "info level %u isn't supported\n",
2096 srch_inf
->info_level
);
2101 req
->FileIndex
= cpu_to_le32(index
);
2102 req
->PersistentFileId
= persistent_fid
;
2103 req
->VolatileFileId
= volatile_fid
;
2106 bufptr
= req
->Buffer
;
2107 memcpy(bufptr
, &asteriks
, len
);
2109 req
->FileNameOffset
=
2110 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
2111 req
->FileNameLength
= cpu_to_le16(len
);
2113 * BB could be 30 bytes or so longer if we used SMB2 specific
2114 * buffer lengths, but this is safe and close enough.
2116 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
2117 output_size
= min_t(unsigned int, output_size
, 2 << 15);
2118 req
->OutputBufferLength
= cpu_to_le32(output_size
);
2120 iov
[0].iov_base
= (char *)req
;
2121 /* 4 for RFC1001 length and 1 for Buffer */
2122 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2124 iov
[1].iov_base
= (char *)(req
->Buffer
);
2125 iov
[1].iov_len
= len
;
2127 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
2129 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
2130 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
2133 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
2137 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2138 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2143 srch_inf
->unicode
= true;
2145 if (srch_inf
->ntwrk_buf_start
) {
2146 if (srch_inf
->smallBuf
)
2147 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
2149 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
2151 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
2152 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
2153 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
2154 /* 4 for rfc1002 length field */
2155 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
2156 srch_inf
->entries_in_buffer
=
2157 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
2158 &srch_inf
->last_entry
, info_buf_size
);
2159 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
2160 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
2161 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
2162 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
2163 if (resp_buftype
== CIFS_LARGE_BUFFER
)
2164 srch_inf
->smallBuf
= false;
2165 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
2166 srch_inf
->smallBuf
= true;
2168 cifs_dbg(VFS
, "illegal search buffer type\n");
2170 if (rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
)
2171 srch_inf
->endOfSearch
= 1;
2173 srch_inf
->endOfSearch
= 0;
2178 free_rsp_buf(resp_buftype
, rsp
);
2183 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2184 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
2185 unsigned int num
, void **data
, unsigned int *size
)
2187 struct smb2_set_info_req
*req
;
2188 struct smb2_set_info_rsp
*rsp
= NULL
;
2193 struct TCP_Server_Info
*server
;
2194 struct cifs_ses
*ses
= tcon
->ses
;
2196 if (ses
&& (ses
->server
))
2197 server
= ses
->server
;
2204 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
2208 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
2214 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2216 req
->InfoType
= SMB2_O_INFO_FILE
;
2217 req
->FileInfoClass
= info_class
;
2218 req
->PersistentFileId
= persistent_fid
;
2219 req
->VolatileFileId
= volatile_fid
;
2221 /* 4 for RFC1001 length and 1 for Buffer */
2223 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
2224 req
->BufferLength
= cpu_to_le32(*size
);
2226 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
2228 memcpy(req
->Buffer
, *data
, *size
);
2230 iov
[0].iov_base
= (char *)req
;
2231 /* 4 for RFC1001 length */
2232 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2234 for (i
= 1; i
< num
; i
++) {
2235 inc_rfc1001_len(req
, size
[i
]);
2236 le32_add_cpu(&req
->BufferLength
, size
[i
]);
2237 iov
[i
].iov_base
= (char *)data
[i
];
2238 iov
[i
].iov_len
= size
[i
];
2241 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
2242 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
2245 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
2247 free_rsp_buf(resp_buftype
, rsp
);
2253 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
2254 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2256 struct smb2_file_rename_info info
;
2258 unsigned int size
[2];
2260 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2262 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2266 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
2267 /* 0 = fail if target already exists */
2268 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2269 info
.FileNameLength
= cpu_to_le32(len
);
2272 size
[0] = sizeof(struct smb2_file_rename_info
);
2274 data
[1] = target_file
;
2275 size
[1] = len
+ 2 /* null */;
2277 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2278 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2285 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2286 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2288 struct smb2_file_link_info info
;
2290 unsigned int size
[2];
2292 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2294 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2298 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2299 /* 0 = fail if link already exists */
2300 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2301 info
.FileNameLength
= cpu_to_le32(len
);
2304 size
[0] = sizeof(struct smb2_file_link_info
);
2306 data
[1] = target_file
;
2307 size
[1] = len
+ 2 /* null */;
2309 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2310 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2316 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2317 u64 volatile_fid
, u32 pid
, __le64
*eof
)
2319 struct smb2_file_eof_info info
;
2323 info
.EndOfFile
= *eof
;
2326 size
= sizeof(struct smb2_file_eof_info
);
2328 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
2329 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2333 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2334 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2337 size
= sizeof(FILE_BASIC_INFO
);
2338 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2339 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2340 (void **)&buf
, &size
);
2344 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2345 const u64 persistent_fid
, const u64 volatile_fid
,
2349 struct smb2_oplock_break
*req
= NULL
;
2351 cifs_dbg(FYI
, "SMB2_oplock_break\n");
2352 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2357 req
->VolatileFid
= volatile_fid
;
2358 req
->PersistentFid
= persistent_fid
;
2359 req
->OplockLevel
= oplock_level
;
2360 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2362 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2363 /* SMB2 buffer freed by function above */
2366 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2367 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
2374 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2375 struct kstatfs
*kst
)
2377 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2378 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2379 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2380 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2381 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2386 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2387 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2390 struct smb2_query_info_req
*req
;
2392 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2394 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2397 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2401 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2402 req
->FileInfoClass
= level
;
2403 req
->PersistentFileId
= persistent_fid
;
2404 req
->VolatileFileId
= volatile_fid
;
2405 /* 4 for rfc1002 length field and 1 for pad */
2406 req
->InputBufferOffset
=
2407 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2408 req
->OutputBufferLength
= cpu_to_le32(
2409 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2411 iov
->iov_base
= (char *)req
;
2412 /* 4 for rfc1002 length field */
2413 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2418 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2419 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2421 struct smb2_query_info_rsp
*rsp
= NULL
;
2425 struct cifs_ses
*ses
= tcon
->ses
;
2426 struct smb2_fs_full_size_info
*info
= NULL
;
2428 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2429 sizeof(struct smb2_fs_full_size_info
),
2430 persistent_fid
, volatile_fid
);
2434 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2436 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2439 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2441 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2442 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2443 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2444 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2445 sizeof(struct smb2_fs_full_size_info
));
2447 copy_fs_info_to_kstatfs(info
, fsdata
);
2450 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2455 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
2456 u64 persistent_fid
, u64 volatile_fid
, int level
)
2458 struct smb2_query_info_rsp
*rsp
= NULL
;
2461 int resp_buftype
, max_len
, min_len
;
2462 struct cifs_ses
*ses
= tcon
->ses
;
2463 unsigned int rsp_len
, offset
;
2465 if (level
== FS_DEVICE_INFORMATION
) {
2466 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
2467 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
2468 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
2469 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
2470 min_len
= MIN_FS_ATTR_INFO_SIZE
;
2471 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
2472 max_len
= sizeof(struct smb3_fs_ss_info
);
2473 min_len
= sizeof(struct smb3_fs_ss_info
);
2475 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
2479 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
2480 persistent_fid
, volatile_fid
);
2484 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2486 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2489 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2491 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
2492 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
2493 rc
= validate_buf(offset
, rsp_len
, &rsp
->hdr
, min_len
);
2497 if (level
== FS_ATTRIBUTE_INFORMATION
)
2498 memcpy(&tcon
->fsAttrInfo
, 4 /* RFC1001 len */ + offset
2499 + (char *)&rsp
->hdr
, min_t(unsigned int,
2501 else if (level
== FS_DEVICE_INFORMATION
)
2502 memcpy(&tcon
->fsDevInfo
, 4 /* RFC1001 len */ + offset
2503 + (char *)&rsp
->hdr
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
2504 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
2505 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
2506 (4 /* RFC1001 len */ + offset
+ (char *)&rsp
->hdr
);
2507 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
2508 tcon
->perf_sector_size
=
2509 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
2513 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2518 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2519 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2520 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2523 struct smb2_lock_req
*req
= NULL
;
2528 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2530 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2534 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2535 req
->LockCount
= cpu_to_le16(num_lock
);
2537 req
->PersistentFileId
= persist_fid
;
2538 req
->VolatileFileId
= volatile_fid
;
2540 count
= num_lock
* sizeof(struct smb2_lock_element
);
2541 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2543 iov
[0].iov_base
= (char *)req
;
2544 /* 4 for rfc1002 length field and count for all locks */
2545 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2546 iov
[1].iov_base
= (char *)buf
;
2547 iov
[1].iov_len
= count
;
2549 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2550 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2552 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2553 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2560 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2561 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2562 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2565 struct smb2_lock_element lock
;
2567 lock
.Offset
= cpu_to_le64(offset
);
2568 lock
.Length
= cpu_to_le64(length
);
2569 lock
.Flags
= cpu_to_le32(lock_flags
);
2570 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2571 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2573 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2577 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2578 __u8
*lease_key
, const __le32 lease_state
)
2581 struct smb2_lease_ack
*req
= NULL
;
2583 cifs_dbg(FYI
, "SMB2_lease_break\n");
2584 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2589 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2590 req
->StructureSize
= cpu_to_le16(36);
2591 inc_rfc1001_len(req
, 12);
2593 memcpy(req
->LeaseKey
, lease_key
, 16);
2594 req
->LeaseState
= lease_state
;
2596 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2597 /* SMB2 buffer freed by function above */
2600 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2601 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);