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 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
112 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
113 if ((tcon
->ses
) && (tcon
->ses
->server
) &&
114 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
115 hdr
->CreditCharge
= cpu_to_le16(1);
116 /* else CreditCharge MBZ */
118 hdr
->TreeId
= tcon
->tid
;
119 /* Uid is not converted */
121 hdr
->SessionId
= tcon
->ses
->Suid
;
124 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
125 * to pass the path on the Open SMB prefixed by \\server\share.
126 * Not sure when we would need to do the augmented path (if ever) and
127 * setting this flag breaks the SMB2 open operation since it is
128 * illegal to send an empty path name (without \\server\share prefix)
129 * when the DFS flag is set in the SMB open header. We could
130 * consider setting the flag on all operations other than open
131 * but it is safer to net set it for now.
133 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
134 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
136 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
)
137 hdr
->Flags
|= SMB2_FLAGS_SIGNED
;
139 pdu
->StructureSize2
= cpu_to_le16(parmsize
);
144 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
147 struct nls_table
*nls_codepage
;
148 struct cifs_ses
*ses
;
149 struct TCP_Server_Info
*server
;
152 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
153 * check for tcp and smb session status done differently
154 * for those three - in the calling routine.
159 if (smb2_command
== SMB2_TREE_CONNECT
)
162 if (tcon
->tidStatus
== CifsExiting
) {
164 * only tree disconnect, open, and write,
165 * (and ulogoff which does not have tcon)
166 * are allowed as we start force umount.
168 if ((smb2_command
!= SMB2_WRITE
) &&
169 (smb2_command
!= SMB2_CREATE
) &&
170 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
171 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
176 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
177 (!tcon
->ses
->server
))
181 server
= ses
->server
;
184 * Give demultiplex thread up to 10 seconds to reconnect, should be
185 * greater than cifs socket timeout which is 7 seconds
187 while (server
->tcpStatus
== CifsNeedReconnect
) {
189 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
190 * here since they are implicitly done when session drops.
192 switch (smb2_command
) {
194 * BB Should we keep oplock break and add flush to exceptions?
196 case SMB2_TREE_DISCONNECT
:
199 case SMB2_OPLOCK_BREAK
:
203 wait_event_interruptible_timeout(server
->response_q
,
204 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
206 /* are we still trying to reconnect? */
207 if (server
->tcpStatus
!= CifsNeedReconnect
)
211 * on "soft" mounts we wait once. Hard mounts keep
212 * retrying until process is killed or server comes
216 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
221 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
224 nls_codepage
= load_nls_default();
227 * need to prevent multiple threads trying to simultaneously reconnect
228 * the same SMB session
230 mutex_lock(&tcon
->ses
->session_mutex
);
231 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
232 if (!rc
&& tcon
->ses
->need_reconnect
)
233 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
235 if (rc
|| !tcon
->need_reconnect
) {
236 mutex_unlock(&tcon
->ses
->session_mutex
);
240 cifs_mark_open_files_invalid(tcon
);
241 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
242 mutex_unlock(&tcon
->ses
->session_mutex
);
243 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
246 atomic_inc(&tconInfoReconnectCount
);
249 * Check if handle based operation so we know whether we can continue
250 * or not without returning to caller to reset file handle.
253 * BB Is flush done by server on drop of tcp session? Should we special
254 * case it and skip above?
256 switch (smb2_command
) {
262 case SMB2_QUERY_DIRECTORY
:
263 case SMB2_CHANGE_NOTIFY
:
264 case SMB2_QUERY_INFO
:
268 unload_nls(nls_codepage
);
273 * Allocate and return pointer to an SMB request hdr, and set basic
274 * SMB information in the SMB header. If the return code is zero, this
275 * function must have filled in request_buf pointer.
278 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
283 rc
= smb2_reconnect(smb2_command
, tcon
);
287 /* BB eventually switch this to SMB2 specific small buf size */
288 *request_buf
= cifs_small_buf_get();
289 if (*request_buf
== NULL
) {
290 /* BB should we add a retry in here if not a writepage? */
294 smb2_hdr_assemble((struct smb2_hdr
*) *request_buf
, smb2_command
, tcon
);
297 #ifdef CONFIG_CIFS_STATS2
298 uint16_t com_code
= le16_to_cpu(smb2_command
);
299 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
301 cifs_stats_inc(&tcon
->num_smbs_sent
);
309 * SMB2 Worker functions follow:
311 * The general structure of the worker functions is:
312 * 1) Call smb2_init (assembles SMB2 header)
313 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
314 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
315 * 4) Decode SMB2 command specific fields in the fixed length area
316 * 5) Decode variable length data area (if any for this SMB2 command type)
317 * 6) Call free smb buffer
323 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
325 struct smb2_negotiate_req
*req
;
326 struct smb2_negotiate_rsp
*rsp
;
330 struct TCP_Server_Info
*server
= ses
->server
;
331 int blob_offset
, blob_length
;
333 int flags
= CIFS_NEG_OP
;
335 cifs_dbg(FYI
, "Negotiate protocol\n");
338 WARN(1, "%s: server is NULL!\n", __func__
);
342 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
346 req
->hdr
.SessionId
= 0;
348 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
350 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
351 inc_rfc1001_len(req
, 2);
353 /* only one of SMB2 signing flags may be set in SMB2 request */
355 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
356 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
357 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
359 req
->SecurityMode
= 0;
361 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
363 /* ClientGUID must be zero for SMB2.02 dialect */
364 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
365 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
367 memcpy(req
->ClientGUID
, server
->client_guid
,
368 SMB2_CLIENT_GUID_SIZE
);
370 iov
[0].iov_base
= (char *)req
;
371 /* 4 for rfc1002 length field */
372 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
374 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
);
376 rsp
= (struct smb2_negotiate_rsp
*)iov
[0].iov_base
;
378 * No tcon so can't do
379 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
384 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
386 /* BB we may eventually want to match the negotiated vs. requested
387 dialect, even though we are only requesting one at a time */
388 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
389 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
390 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
391 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
392 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
393 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
394 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
395 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
396 #ifdef CONFIG_CIFS_SMB311
397 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
398 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
401 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
402 le16_to_cpu(rsp
->DialectRevision
));
406 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
408 /* SMB2 only has an extended negflavor */
409 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
410 /* set it to the maximum buffer size value we can send with 1 credit */
411 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
412 SMB2_MAX_BUFFER_SIZE
);
413 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
414 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
415 /* BB Do we need to validate the SecurityMode? */
416 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
417 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
419 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
421 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
424 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
426 * ses->sectype = RawNTLMSSP;
427 * but for time being this is our only auth choice so doesn't matter.
428 * We just found a server which sets blob length to zero expecting raw.
430 if (blob_length
== 0)
431 cifs_dbg(FYI
, "missing security blob on negprot\n");
433 rc
= cifs_enable_signing(server
, ses
->sign
);
434 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
438 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
448 free_rsp_buf(resp_buftype
, rsp
);
452 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
455 struct validate_negotiate_info_req vneg_inbuf
;
456 struct validate_negotiate_info_rsp
*pneg_rsp
;
459 cifs_dbg(FYI
, "validate negotiate\n");
462 * validation ioctl must be signed, so no point sending this if we
463 * can not sign it. We could eventually change this to selectively
464 * sign just this, the first and only signed request on a connection.
465 * This is good enough for now since a user who wants better security
466 * would also enable signing on the mount. Having validation of
467 * negotiate info for signed connections helps reduce attack vectors
469 if (tcon
->ses
->server
->sign
== false)
470 return 0; /* validation requires signing */
472 vneg_inbuf
.Capabilities
=
473 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
474 memcpy(vneg_inbuf
.Guid
, tcon
->ses
->server
->client_guid
,
475 SMB2_CLIENT_GUID_SIZE
);
478 vneg_inbuf
.SecurityMode
=
479 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
480 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
481 vneg_inbuf
.SecurityMode
=
482 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
484 vneg_inbuf
.SecurityMode
= 0;
486 vneg_inbuf
.DialectCount
= cpu_to_le16(1);
487 vneg_inbuf
.Dialects
[0] =
488 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
490 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
491 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
492 (char *)&vneg_inbuf
, sizeof(struct validate_negotiate_info_req
),
493 (char **)&pneg_rsp
, &rsplen
);
496 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
500 if (rsplen
!= sizeof(struct validate_negotiate_info_rsp
)) {
501 cifs_dbg(VFS
, "invalid size of protocol negotiate response\n");
505 /* check validate negotiate info response matches what we got earlier */
506 if (pneg_rsp
->Dialect
!=
507 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
))
510 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
513 /* do not validate server guid because not saved at negprot time yet */
515 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
516 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
519 /* validate negotiate successful */
520 cifs_dbg(FYI
, "validate negotiate info successful\n");
524 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
529 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
530 const struct nls_table
*nls_cp
)
532 struct smb2_sess_setup_req
*req
;
533 struct smb2_sess_setup_rsp
*rsp
= NULL
;
536 int resp_buftype
= CIFS_NO_BUFFER
;
537 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
538 struct TCP_Server_Info
*server
= ses
->server
;
541 char *ntlmssp_blob
= NULL
;
542 bool use_spnego
= false; /* else use raw ntlmssp */
544 cifs_dbg(FYI
, "Session Setup\n");
547 WARN(1, "%s: server is NULL!\n", __func__
);
552 * If we are here due to reconnect, free per-smb session key
553 * in case signing was required.
555 kfree(ses
->auth_key
.response
);
556 ses
->auth_key
.response
= NULL
;
559 * If memory allocation is successful, caller of this function
562 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
565 ses
->ntlmssp
->sesskey_per_smbsess
= true;
567 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
568 ses
->sectype
= RawNTLMSSP
;
570 ssetup_ntlmssp_authenticate
:
571 if (phase
== NtLmChallenge
)
572 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
574 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
578 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
579 req
->Flags
= 0; /* MBZ */
580 /* to enable echos and oplocks */
581 req
->hdr
.CreditRequest
= cpu_to_le16(3);
583 /* only one of SMB2 signing flags may be set in SMB2 request */
585 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
586 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
587 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
589 req
->SecurityMode
= 0;
591 req
->Capabilities
= 0;
592 req
->Channel
= 0; /* MBZ */
594 iov
[0].iov_base
= (char *)req
;
595 /* 4 for rfc1002 length field and 1 for pad */
596 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
597 if (phase
== NtLmNegotiate
) {
598 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
600 if (ntlmssp_blob
== NULL
) {
604 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
606 /* blob_length = build_spnego_ntlmssp_blob(
608 sizeof(struct _NEGOTIATE_MESSAGE),
610 /* BB eventually need to add this */
611 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
616 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
617 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
618 security_blob
= ntlmssp_blob
;
620 } else if (phase
== NtLmAuthenticate
) {
621 req
->hdr
.SessionId
= ses
->Suid
;
622 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
624 if (ntlmssp_blob
== NULL
) {
628 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
631 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n",
633 goto ssetup_exit
; /* BB double check error handling */
636 /* blob_length = build_spnego_ntlmssp_blob(
640 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
645 security_blob
= ntlmssp_blob
;
648 cifs_dbg(VFS
, "illegal ntlmssp phase\n");
653 /* Testing shows that buffer offset must be at location of Buffer[0] */
654 req
->SecurityBufferOffset
=
655 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
656 1 /* pad */ - 4 /* rfc1001 len */);
657 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
658 iov
[1].iov_base
= security_blob
;
659 iov
[1].iov_len
= blob_length
;
661 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
663 /* BB add code to build os and lm fields */
665 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
,
666 CIFS_LOG_ERROR
| CIFS_NEG_OP
);
668 kfree(security_blob
);
669 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
670 if (resp_buftype
!= CIFS_NO_BUFFER
&&
671 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
672 if (phase
!= NtLmNegotiate
) {
673 cifs_dbg(VFS
, "Unexpected more processing error\n");
676 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
677 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
678 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
679 le16_to_cpu(rsp
->SecurityBufferOffset
));
684 /* NTLMSSP Negotiate sent now processing challenge (response) */
685 phase
= NtLmChallenge
; /* process ntlmssp challenge */
686 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
687 ses
->Suid
= rsp
->hdr
.SessionId
;
688 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
689 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
693 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
694 * but at least the raw NTLMSSP case works.
697 * No tcon so can't do
698 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
703 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
704 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
705 cifs_dbg(VFS
, "SMB3 encryption not supported yet\n");
707 free_rsp_buf(resp_buftype
, rsp
);
709 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
710 if ((phase
== NtLmChallenge
) && (rc
== 0))
711 goto ssetup_ntlmssp_authenticate
;
714 mutex_lock(&server
->srv_mutex
);
715 if (server
->sign
&& server
->ops
->generate_signingkey
) {
716 rc
= server
->ops
->generate_signingkey(ses
);
717 kfree(ses
->auth_key
.response
);
718 ses
->auth_key
.response
= NULL
;
721 "SMB3 session key generation failed\n");
722 mutex_unlock(&server
->srv_mutex
);
726 if (!server
->session_estab
) {
727 server
->sequence_number
= 0x2;
728 server
->session_estab
= true;
730 mutex_unlock(&server
->srv_mutex
);
732 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
733 spin_lock(&GlobalMid_Lock
);
734 ses
->status
= CifsGood
;
735 ses
->need_reconnect
= false;
736 spin_unlock(&GlobalMid_Lock
);
741 kfree(ses
->auth_key
.response
);
742 ses
->auth_key
.response
= NULL
;
750 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
752 struct smb2_logoff_req
*req
; /* response is also trivial struct */
754 struct TCP_Server_Info
*server
;
756 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
758 if (ses
&& (ses
->server
))
759 server
= ses
->server
;
763 /* no need to send SMB logoff if uid already closed due to reconnect */
764 if (ses
->need_reconnect
)
765 goto smb2_session_already_dead
;
767 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
771 /* since no tcon, smb2_init can not do this, so do here */
772 req
->hdr
.SessionId
= ses
->Suid
;
774 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
776 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
778 * No tcon so can't do
779 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
782 smb2_session_already_dead
:
786 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
788 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
791 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
793 /* These are similar values to what Windows uses */
794 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
796 tcon
->max_chunks
= 256;
797 tcon
->max_bytes_chunk
= 1048576;
798 tcon
->max_bytes_copy
= 16777216;
802 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
803 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
805 struct smb2_tree_connect_req
*req
;
806 struct smb2_tree_connect_rsp
*rsp
= NULL
;
811 struct TCP_Server_Info
*server
;
812 __le16
*unc_path
= NULL
;
814 cifs_dbg(FYI
, "TCON\n");
816 if ((ses
->server
) && tree
)
817 server
= ses
->server
;
821 if (tcon
&& tcon
->bad_network_name
)
824 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
825 if (unc_path
== NULL
)
828 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
830 if (unc_path_len
< 2) {
835 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
842 /* since no tcon, smb2_init can not do this, so do here */
843 req
->hdr
.SessionId
= ses
->Suid
;
844 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
845 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
848 iov
[0].iov_base
= (char *)req
;
849 /* 4 for rfc1002 length field and 1 for pad */
850 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
852 /* Testing shows that buffer offset must be at location of Buffer[0] */
853 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
854 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
855 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
856 iov
[1].iov_base
= unc_path
;
857 iov
[1].iov_len
= unc_path_len
;
859 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
861 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
862 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
866 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
867 tcon
->need_reconnect
= true;
869 goto tcon_error_exit
;
873 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
877 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
878 cifs_dbg(FYI
, "connection to disk share\n");
879 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
881 cifs_dbg(FYI
, "connection to pipe share\n");
882 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
884 cifs_dbg(FYI
, "connection to printer\n");
886 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
888 goto tcon_error_exit
;
891 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
892 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
893 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
894 tcon
->tidStatus
= CifsGood
;
895 tcon
->need_reconnect
= false;
896 tcon
->tid
= rsp
->hdr
.TreeId
;
897 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
899 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
900 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
901 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
902 init_copy_chunk_defaults(tcon
);
903 if (tcon
->ses
->server
->ops
->validate_negotiate
)
904 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
906 free_rsp_buf(resp_buftype
, rsp
);
911 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
912 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
914 tcon
->bad_network_name
= true;
920 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
922 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
924 struct TCP_Server_Info
*server
;
925 struct cifs_ses
*ses
= tcon
->ses
;
927 cifs_dbg(FYI
, "Tree Disconnect\n");
929 if (ses
&& (ses
->server
))
930 server
= ses
->server
;
934 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
937 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
941 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
943 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
949 static struct create_durable
*
950 create_durable_buf(void)
952 struct create_durable
*buf
;
954 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
958 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
959 (struct create_durable
, Data
));
960 buf
->ccontext
.DataLength
= cpu_to_le32(16);
961 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
962 (struct create_durable
, Name
));
963 buf
->ccontext
.NameLength
= cpu_to_le16(4);
964 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
972 static struct create_durable
*
973 create_reconnect_durable_buf(struct cifs_fid
*fid
)
975 struct create_durable
*buf
;
977 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
981 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
982 (struct create_durable
, Data
));
983 buf
->ccontext
.DataLength
= cpu_to_le32(16);
984 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
985 (struct create_durable
, Name
));
986 buf
->ccontext
.NameLength
= cpu_to_le16(4);
987 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
988 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
989 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
998 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1002 struct create_context
*cc
;
1003 unsigned int next
= 0;
1006 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
1007 cc
= (struct create_context
*)data_offset
;
1009 cc
= (struct create_context
*)((char *)cc
+ next
);
1010 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1011 if (le16_to_cpu(cc
->NameLength
) != 4 ||
1012 strncmp(name
, "RqLs", 4)) {
1013 next
= le32_to_cpu(cc
->Next
);
1016 return server
->ops
->parse_lease_buf(cc
, epoch
);
1017 } while (next
!= 0);
1023 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1024 unsigned int *num_iovec
, __u8
*oplock
)
1026 struct smb2_create_req
*req
= iov
[0].iov_base
;
1027 unsigned int num
= *num_iovec
;
1029 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1030 if (iov
[num
].iov_base
== NULL
)
1032 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1033 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1034 if (!req
->CreateContextsOffset
)
1035 req
->CreateContextsOffset
= cpu_to_le32(
1036 sizeof(struct smb2_create_req
) - 4 +
1037 iov
[num
- 1].iov_len
);
1038 le32_add_cpu(&req
->CreateContextsLength
,
1039 server
->vals
->create_lease_size
);
1040 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
1041 *num_iovec
= num
+ 1;
1046 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1047 struct cifs_open_parms
*oparms
)
1049 struct smb2_create_req
*req
= iov
[0].iov_base
;
1050 unsigned int num
= *num_iovec
;
1052 if (oparms
->reconnect
) {
1053 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1054 /* indicate that we don't need to relock the file */
1055 oparms
->reconnect
= false;
1057 iov
[num
].iov_base
= create_durable_buf();
1058 if (iov
[num
].iov_base
== NULL
)
1060 iov
[num
].iov_len
= sizeof(struct create_durable
);
1061 if (!req
->CreateContextsOffset
)
1062 req
->CreateContextsOffset
=
1063 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1065 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1066 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
1067 *num_iovec
= num
+ 1;
1072 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1073 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1074 struct smb2_err_rsp
**err_buf
)
1076 struct smb2_create_req
*req
;
1077 struct smb2_create_rsp
*rsp
;
1078 struct TCP_Server_Info
*server
;
1079 struct cifs_tcon
*tcon
= oparms
->tcon
;
1080 struct cifs_ses
*ses
= tcon
->ses
;
1084 __le16
*copy_path
= NULL
;
1087 unsigned int num_iovecs
= 2;
1088 __u32 file_attributes
= 0;
1089 char *dhc_buf
= NULL
, *lc_buf
= NULL
;
1091 cifs_dbg(FYI
, "create/open\n");
1093 if (ses
&& (ses
->server
))
1094 server
= ses
->server
;
1098 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1102 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1103 file_attributes
|= ATTR_READONLY
;
1104 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
1105 file_attributes
|= ATTR_SYSTEM
;
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
);
1158 lc_buf
= iov
[num_iovecs
-1].iov_base
;
1161 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1162 /* need to set Next field of lease context if we request it */
1163 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
1164 struct create_context
*ccontext
=
1165 (struct create_context
*)iov
[num_iovecs
-1].iov_base
;
1167 cpu_to_le32(server
->vals
->create_lease_size
);
1169 rc
= add_durable_context(iov
, &num_iovecs
, oparms
);
1171 cifs_small_buf_release(req
);
1176 dhc_buf
= iov
[num_iovecs
-1].iov_base
;
1179 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1180 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
1183 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1185 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1190 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1191 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1194 memcpy(buf
, &rsp
->CreationTime
, 32);
1195 buf
->AllocationSize
= rsp
->AllocationSize
;
1196 buf
->EndOfFile
= rsp
->EndofFile
;
1197 buf
->Attributes
= rsp
->FileAttributes
;
1198 buf
->NumberOfLinks
= cpu_to_le32(1);
1199 buf
->DeletePending
= 0;
1202 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1203 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1205 *oplock
= rsp
->OplockLevel
;
1210 free_rsp_buf(resp_buftype
, rsp
);
1215 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1218 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1219 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, char *in_data
,
1220 u32 indatalen
, char **out_data
, u32
*plen
/* returned data len */)
1222 struct smb2_ioctl_req
*req
;
1223 struct smb2_ioctl_rsp
*rsp
;
1224 struct TCP_Server_Info
*server
;
1225 struct cifs_ses
*ses
;
1231 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1233 if (out_data
!= NULL
)
1236 /* zero out returned data len, in case of error */
1245 if (ses
&& (ses
->server
))
1246 server
= ses
->server
;
1250 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1254 req
->CtlCode
= cpu_to_le32(opcode
);
1255 req
->PersistentFileId
= persistent_fid
;
1256 req
->VolatileFileId
= volatile_fid
;
1259 req
->InputCount
= cpu_to_le32(indatalen
);
1260 /* do not set InputOffset if no input data */
1262 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1263 iov
[1].iov_base
= in_data
;
1264 iov
[1].iov_len
= indatalen
;
1269 req
->OutputOffset
= 0;
1270 req
->OutputCount
= 0; /* MBZ */
1273 * Could increase MaxOutputResponse, but that would require more
1274 * than one credit. Windows typically sets this smaller, but for some
1275 * ioctls it may be useful to allow server to send more. No point
1276 * limiting what the server can send as long as fits in one credit
1278 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1281 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1285 iov
[0].iov_base
= (char *)req
;
1288 * If no input data, the size of ioctl struct in
1289 * protocol spec still includes a 1 byte data buffer,
1290 * but if input data passed to ioctl, we do not
1291 * want to double count this, so we do not send
1292 * the dummy one byte of data in iovec[0] if sending
1293 * input data (in iovec[1]). We also must add 4 bytes
1294 * in first iovec to allow for rfc1002 length field.
1298 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1299 inc_rfc1001_len(req
, indatalen
- 1);
1301 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1304 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1305 rsp
= (struct smb2_ioctl_rsp
*)iov
[0].iov_base
;
1307 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
1308 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1310 } else if (rc
== -EINVAL
) {
1311 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
1312 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
1313 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1318 /* check if caller wants to look at return data or just return rc */
1319 if ((plen
== NULL
) || (out_data
== NULL
))
1322 *plen
= le32_to_cpu(rsp
->OutputCount
);
1324 /* We check for obvious errors in the output buffer length and offset */
1326 goto ioctl_exit
; /* server returned no data */
1327 else if (*plen
> 0xFF00) {
1328 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1334 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1335 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1336 le32_to_cpu(rsp
->OutputOffset
));
1342 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1343 if (*out_data
== NULL
) {
1348 memcpy(*out_data
, rsp
->hdr
.ProtocolId
+ le32_to_cpu(rsp
->OutputOffset
),
1351 free_rsp_buf(resp_buftype
, rsp
);
1356 * Individual callers to ioctl worker function follow
1360 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
1361 u64 persistent_fid
, u64 volatile_fid
)
1364 struct compress_ioctl fsctl_input
;
1365 char *ret_data
= NULL
;
1367 fsctl_input
.CompressionState
=
1368 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
1370 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
1371 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
1372 (char *)&fsctl_input
/* data input */,
1373 2 /* in data len */, &ret_data
/* out data */, NULL
);
1375 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
1381 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1382 u64 persistent_fid
, u64 volatile_fid
)
1384 struct smb2_close_req
*req
;
1385 struct smb2_close_rsp
*rsp
;
1386 struct TCP_Server_Info
*server
;
1387 struct cifs_ses
*ses
= tcon
->ses
;
1392 cifs_dbg(FYI
, "Close\n");
1394 if (ses
&& (ses
->server
))
1395 server
= ses
->server
;
1399 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1403 req
->PersistentFileId
= persistent_fid
;
1404 req
->VolatileFileId
= volatile_fid
;
1406 iov
[0].iov_base
= (char *)req
;
1407 /* 4 for rfc1002 length field */
1408 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1410 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1411 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1414 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1418 /* BB FIXME - decode close response, update inode for caching */
1421 free_rsp_buf(resp_buftype
, rsp
);
1426 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1427 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1430 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1431 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1432 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1433 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1436 if (buffer_length
< min_buf_size
) {
1437 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1438 buffer_length
, min_buf_size
);
1442 /* check if beyond RFC1001 maximum length */
1443 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1444 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1445 buffer_length
, smb_len
);
1449 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1450 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1458 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1459 * Caller must free buffer.
1462 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1463 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1467 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1473 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1477 memcpy(data
, begin_of_buf
, buffer_length
);
1483 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1484 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1485 size_t output_len
, size_t min_len
, void *data
)
1487 struct smb2_query_info_req
*req
;
1488 struct smb2_query_info_rsp
*rsp
= NULL
;
1492 struct TCP_Server_Info
*server
;
1493 struct cifs_ses
*ses
= tcon
->ses
;
1495 cifs_dbg(FYI
, "Query Info\n");
1497 if (ses
&& (ses
->server
))
1498 server
= ses
->server
;
1502 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1506 req
->InfoType
= SMB2_O_INFO_FILE
;
1507 req
->FileInfoClass
= info_class
;
1508 req
->PersistentFileId
= persistent_fid
;
1509 req
->VolatileFileId
= volatile_fid
;
1510 /* 4 for rfc1002 length field and 1 for Buffer */
1511 req
->InputBufferOffset
=
1512 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1513 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1515 iov
[0].iov_base
= (char *)req
;
1516 /* 4 for rfc1002 length field */
1517 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1519 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1520 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1523 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1527 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1528 le32_to_cpu(rsp
->OutputBufferLength
),
1529 &rsp
->hdr
, min_len
, data
);
1532 free_rsp_buf(resp_buftype
, rsp
);
1537 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1538 u64 persistent_fid
, u64 volatile_fid
,
1539 struct smb2_file_all_info
*data
)
1541 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1542 FILE_ALL_INFORMATION
,
1543 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
1544 sizeof(struct smb2_file_all_info
), data
);
1548 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1549 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1551 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1552 FILE_INTERNAL_INFORMATION
,
1553 sizeof(struct smb2_file_internal_info
),
1554 sizeof(struct smb2_file_internal_info
), uniqueid
);
1558 * This is a no-op for now. We're not really interested in the reply, but
1559 * rather in the fact that the server sent one and that server->lstrp
1562 * FIXME: maybe we should consider checking that the reply matches request?
1565 smb2_echo_callback(struct mid_q_entry
*mid
)
1567 struct TCP_Server_Info
*server
= mid
->callback_data
;
1568 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1569 unsigned int credits_received
= 1;
1571 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1572 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1574 DeleteMidQEntry(mid
);
1575 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1579 SMB2_echo(struct TCP_Server_Info
*server
)
1581 struct smb2_echo_req
*req
;
1584 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1587 cifs_dbg(FYI
, "In echo request\n");
1589 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1593 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1595 iov
.iov_base
= (char *)req
;
1596 /* 4 for rfc1002 length field */
1597 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1599 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1602 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
1604 cifs_small_buf_release(req
);
1609 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1612 struct smb2_flush_req
*req
;
1613 struct TCP_Server_Info
*server
;
1614 struct cifs_ses
*ses
= tcon
->ses
;
1619 cifs_dbg(FYI
, "Flush\n");
1621 if (ses
&& (ses
->server
))
1622 server
= ses
->server
;
1626 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1630 req
->PersistentFileId
= persistent_fid
;
1631 req
->VolatileFileId
= volatile_fid
;
1633 iov
[0].iov_base
= (char *)req
;
1634 /* 4 for rfc1002 length field */
1635 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1637 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1640 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1642 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1647 * To form a chain of read requests, any read requests after the first should
1648 * have the end_of_chain boolean set to true.
1651 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1652 unsigned int remaining_bytes
, int request_type
)
1655 struct smb2_read_req
*req
= NULL
;
1657 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1660 if (io_parms
->tcon
->ses
->server
== NULL
)
1661 return -ECONNABORTED
;
1663 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1665 req
->PersistentFileId
= io_parms
->persistent_fid
;
1666 req
->VolatileFileId
= io_parms
->volatile_fid
;
1667 req
->ReadChannelInfoOffset
= 0; /* reserved */
1668 req
->ReadChannelInfoLength
= 0; /* reserved */
1669 req
->Channel
= 0; /* reserved */
1670 req
->MinimumCount
= 0;
1671 req
->Length
= cpu_to_le32(io_parms
->length
);
1672 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1674 if (request_type
& CHAINED_REQUEST
) {
1675 if (!(request_type
& END_OF_CHAIN
)) {
1676 /* 4 for rfc1002 length field */
1677 req
->hdr
.NextCommand
=
1678 cpu_to_le32(get_rfc1002_length(req
) + 4);
1679 } else /* END_OF_CHAIN */
1680 req
->hdr
.NextCommand
= 0;
1681 if (request_type
& RELATED_REQUEST
) {
1682 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1684 * Related requests use info from previous read request
1687 req
->hdr
.SessionId
= 0xFFFFFFFF;
1688 req
->hdr
.TreeId
= 0xFFFFFFFF;
1689 req
->PersistentFileId
= 0xFFFFFFFF;
1690 req
->VolatileFileId
= 0xFFFFFFFF;
1693 if (remaining_bytes
> io_parms
->length
)
1694 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1696 req
->RemainingBytes
= 0;
1698 iov
[0].iov_base
= (char *)req
;
1699 /* 4 for rfc1002 length field */
1700 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1705 smb2_readv_callback(struct mid_q_entry
*mid
)
1707 struct cifs_readdata
*rdata
= mid
->callback_data
;
1708 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1709 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1710 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1711 unsigned int credits_received
= 1;
1712 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1714 .rq_pages
= rdata
->pages
,
1715 .rq_npages
= rdata
->nr_pages
,
1716 .rq_pagesz
= rdata
->pagesz
,
1717 .rq_tailsz
= rdata
->tailsz
};
1719 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1720 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
1723 switch (mid
->mid_state
) {
1724 case MID_RESPONSE_RECEIVED
:
1725 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1726 /* result already set, check signature */
1730 rc
= smb2_verify_signature(&rqst
, server
);
1732 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
1735 /* FIXME: should this be counted toward the initiating task? */
1736 task_io_account_read(rdata
->got_bytes
);
1737 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
1739 case MID_REQUEST_SUBMITTED
:
1740 case MID_RETRY_NEEDED
:
1741 rdata
->result
= -EAGAIN
;
1742 if (server
->sign
&& rdata
->got_bytes
)
1743 /* reset bytes number since we can not check a sign */
1744 rdata
->got_bytes
= 0;
1745 /* FIXME: should this be counted toward the initiating task? */
1746 task_io_account_read(rdata
->got_bytes
);
1747 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
1750 if (rdata
->result
!= -ENODATA
)
1751 rdata
->result
= -EIO
;
1755 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1757 queue_work(cifsiod_wq
, &rdata
->work
);
1758 DeleteMidQEntry(mid
);
1759 add_credits(server
, credits_received
, 0);
1762 /* smb2_async_readv - send an async write, and set up mid to handle result */
1764 smb2_async_readv(struct cifs_readdata
*rdata
)
1767 struct smb2_hdr
*buf
;
1768 struct cifs_io_parms io_parms
;
1769 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1771 struct TCP_Server_Info
*server
;
1773 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
1774 __func__
, rdata
->offset
, rdata
->bytes
);
1776 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1777 io_parms
.offset
= rdata
->offset
;
1778 io_parms
.length
= rdata
->bytes
;
1779 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1780 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1781 io_parms
.pid
= rdata
->pid
;
1783 server
= io_parms
.tcon
->ses
->server
;
1785 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1787 if (rc
== -EAGAIN
&& rdata
->credits
) {
1788 /* credits was reset by reconnect */
1790 /* reduce in_flight value since we won't send the req */
1791 spin_lock(&server
->req_lock
);
1792 server
->in_flight
--;
1793 spin_unlock(&server
->req_lock
);
1798 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1799 /* 4 for rfc1002 length field */
1800 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1802 if (rdata
->credits
) {
1803 buf
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
1804 SMB2_MAX_BUFFER_SIZE
));
1805 spin_lock(&server
->req_lock
);
1806 server
->credits
+= rdata
->credits
-
1807 le16_to_cpu(buf
->CreditCharge
);
1808 spin_unlock(&server
->req_lock
);
1809 wake_up(&server
->request_q
);
1810 flags
= CIFS_HAS_CREDITS
;
1813 kref_get(&rdata
->refcount
);
1814 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1815 cifs_readv_receive
, smb2_readv_callback
,
1818 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1819 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1822 cifs_small_buf_release(buf
);
1827 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1828 unsigned int *nbytes
, char **buf
, int *buf_type
)
1830 int resp_buftype
, rc
= -EACCES
;
1831 struct smb2_read_rsp
*rsp
= NULL
;
1835 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1839 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1840 &resp_buftype
, CIFS_LOG_ERROR
);
1842 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1844 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1845 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1850 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1851 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
1853 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1854 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1855 (*nbytes
> io_parms
->length
)) {
1856 cifs_dbg(FYI
, "bad length %d for count %d\n",
1857 *nbytes
, io_parms
->length
);
1864 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1866 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1867 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1868 *buf
= iov
[0].iov_base
;
1869 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1870 *buf_type
= CIFS_SMALL_BUFFER
;
1871 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1872 *buf_type
= CIFS_LARGE_BUFFER
;
1878 * Check the mid_state and signature on received buffer (if any), and queue the
1879 * workqueue completion task.
1882 smb2_writev_callback(struct mid_q_entry
*mid
)
1884 struct cifs_writedata
*wdata
= mid
->callback_data
;
1885 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1886 unsigned int written
;
1887 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1888 unsigned int credits_received
= 1;
1890 switch (mid
->mid_state
) {
1891 case MID_RESPONSE_RECEIVED
:
1892 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1893 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1894 if (wdata
->result
!= 0)
1897 written
= le32_to_cpu(rsp
->DataLength
);
1899 * Mask off high 16 bits when bytes written as returned
1900 * by the server is greater than bytes requested by the
1901 * client. OS/2 servers are known to set incorrect
1904 if (written
> wdata
->bytes
)
1907 if (written
< wdata
->bytes
)
1908 wdata
->result
= -ENOSPC
;
1910 wdata
->bytes
= written
;
1912 case MID_REQUEST_SUBMITTED
:
1913 case MID_RETRY_NEEDED
:
1914 wdata
->result
= -EAGAIN
;
1917 wdata
->result
= -EIO
;
1922 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1924 queue_work(cifsiod_wq
, &wdata
->work
);
1925 DeleteMidQEntry(mid
);
1926 add_credits(tcon
->ses
->server
, credits_received
, 0);
1929 /* smb2_async_writev - send an async write, and set up mid to handle result */
1931 smb2_async_writev(struct cifs_writedata
*wdata
,
1932 void (*release
)(struct kref
*kref
))
1934 int rc
= -EACCES
, flags
= 0;
1935 struct smb2_write_req
*req
= NULL
;
1936 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1937 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1939 struct smb_rqst rqst
;
1941 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1943 if (rc
== -EAGAIN
&& wdata
->credits
) {
1944 /* credits was reset by reconnect */
1946 /* reduce in_flight value since we won't send the req */
1947 spin_lock(&server
->req_lock
);
1948 server
->in_flight
--;
1949 spin_unlock(&server
->req_lock
);
1951 goto async_writev_out
;
1954 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1956 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1957 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1958 req
->WriteChannelInfoOffset
= 0;
1959 req
->WriteChannelInfoLength
= 0;
1961 req
->Offset
= cpu_to_le64(wdata
->offset
);
1962 /* 4 for rfc1002 length field */
1963 req
->DataOffset
= cpu_to_le16(
1964 offsetof(struct smb2_write_req
, Buffer
) - 4);
1965 req
->RemainingBytes
= 0;
1967 /* 4 for rfc1002 length field and 1 for Buffer */
1968 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1973 rqst
.rq_pages
= wdata
->pages
;
1974 rqst
.rq_npages
= wdata
->nr_pages
;
1975 rqst
.rq_pagesz
= wdata
->pagesz
;
1976 rqst
.rq_tailsz
= wdata
->tailsz
;
1978 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
1979 wdata
->offset
, wdata
->bytes
);
1981 req
->Length
= cpu_to_le32(wdata
->bytes
);
1983 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1985 if (wdata
->credits
) {
1986 req
->hdr
.CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
1987 SMB2_MAX_BUFFER_SIZE
));
1988 spin_lock(&server
->req_lock
);
1989 server
->credits
+= wdata
->credits
-
1990 le16_to_cpu(req
->hdr
.CreditCharge
);
1991 spin_unlock(&server
->req_lock
);
1992 wake_up(&server
->request_q
);
1993 flags
= CIFS_HAS_CREDITS
;
1996 kref_get(&wdata
->refcount
);
1997 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, wdata
,
2001 kref_put(&wdata
->refcount
, release
);
2002 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2006 cifs_small_buf_release(req
);
2011 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2012 * The length field from io_parms must be at least 1 and indicates a number of
2013 * elements with data to write that begins with position 1 in iov array. All
2014 * data length is specified by count.
2017 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2018 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
2021 struct smb2_write_req
*req
= NULL
;
2022 struct smb2_write_rsp
*rsp
= NULL
;
2029 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
2033 if (io_parms
->tcon
->ses
->server
== NULL
)
2034 return -ECONNABORTED
;
2036 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
2038 req
->PersistentFileId
= io_parms
->persistent_fid
;
2039 req
->VolatileFileId
= io_parms
->volatile_fid
;
2040 req
->WriteChannelInfoOffset
= 0;
2041 req
->WriteChannelInfoLength
= 0;
2043 req
->Length
= cpu_to_le32(io_parms
->length
);
2044 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2045 /* 4 for rfc1002 length field */
2046 req
->DataOffset
= cpu_to_le16(
2047 offsetof(struct smb2_write_req
, Buffer
) - 4);
2048 req
->RemainingBytes
= 0;
2050 iov
[0].iov_base
= (char *)req
;
2051 /* 4 for rfc1002 length field and 1 for Buffer */
2052 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2054 /* length of entire message including data to be written */
2055 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
2057 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
2059 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
2062 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
2063 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
2065 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2067 free_rsp_buf(resp_buftype
, rsp
);
2072 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
2075 unsigned int entrycount
= 0;
2076 unsigned int next_offset
= 0;
2077 FILE_DIRECTORY_INFO
*entryptr
;
2079 if (bufstart
== NULL
)
2082 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
2085 entryptr
= (FILE_DIRECTORY_INFO
*)
2086 ((char *)entryptr
+ next_offset
);
2088 if ((char *)entryptr
+ size
> end_of_buf
) {
2089 cifs_dbg(VFS
, "malformed search entry would overflow\n");
2093 len
= le32_to_cpu(entryptr
->FileNameLength
);
2094 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
2095 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
2100 *lastentry
= (char *)entryptr
;
2103 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
2115 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
2116 u64 persistent_fid
, u64 volatile_fid
, int index
,
2117 struct cifs_search_info
*srch_inf
)
2119 struct smb2_query_directory_req
*req
;
2120 struct smb2_query_directory_rsp
*rsp
= NULL
;
2124 int resp_buftype
= CIFS_NO_BUFFER
;
2125 unsigned char *bufptr
;
2126 struct TCP_Server_Info
*server
;
2127 struct cifs_ses
*ses
= tcon
->ses
;
2128 __le16 asteriks
= cpu_to_le16('*');
2130 unsigned int output_size
= CIFSMaxBufSize
;
2131 size_t info_buf_size
;
2133 if (ses
&& (ses
->server
))
2134 server
= ses
->server
;
2138 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
2142 switch (srch_inf
->info_level
) {
2143 case SMB_FIND_FILE_DIRECTORY_INFO
:
2144 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
2145 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
2147 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
2148 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
2149 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
2152 cifs_dbg(VFS
, "info level %u isn't supported\n",
2153 srch_inf
->info_level
);
2158 req
->FileIndex
= cpu_to_le32(index
);
2159 req
->PersistentFileId
= persistent_fid
;
2160 req
->VolatileFileId
= volatile_fid
;
2163 bufptr
= req
->Buffer
;
2164 memcpy(bufptr
, &asteriks
, len
);
2166 req
->FileNameOffset
=
2167 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
2168 req
->FileNameLength
= cpu_to_le16(len
);
2170 * BB could be 30 bytes or so longer if we used SMB2 specific
2171 * buffer lengths, but this is safe and close enough.
2173 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
2174 output_size
= min_t(unsigned int, output_size
, 2 << 15);
2175 req
->OutputBufferLength
= cpu_to_le32(output_size
);
2177 iov
[0].iov_base
= (char *)req
;
2178 /* 4 for RFC1001 length and 1 for Buffer */
2179 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2181 iov
[1].iov_base
= (char *)(req
->Buffer
);
2182 iov
[1].iov_len
= len
;
2184 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
2186 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
2187 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
2190 if (rc
== -ENODATA
&& rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
) {
2191 srch_inf
->endOfSearch
= true;
2194 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
2198 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2199 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2204 srch_inf
->unicode
= true;
2206 if (srch_inf
->ntwrk_buf_start
) {
2207 if (srch_inf
->smallBuf
)
2208 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
2210 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
2212 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
2213 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
2214 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
2215 /* 4 for rfc1002 length field */
2216 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
2217 srch_inf
->entries_in_buffer
=
2218 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
2219 &srch_inf
->last_entry
, info_buf_size
);
2220 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
2221 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
2222 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
2223 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
2224 if (resp_buftype
== CIFS_LARGE_BUFFER
)
2225 srch_inf
->smallBuf
= false;
2226 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
2227 srch_inf
->smallBuf
= true;
2229 cifs_dbg(VFS
, "illegal search buffer type\n");
2234 free_rsp_buf(resp_buftype
, rsp
);
2239 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2240 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
2241 unsigned int num
, void **data
, unsigned int *size
)
2243 struct smb2_set_info_req
*req
;
2244 struct smb2_set_info_rsp
*rsp
= NULL
;
2249 struct TCP_Server_Info
*server
;
2250 struct cifs_ses
*ses
= tcon
->ses
;
2252 if (ses
&& (ses
->server
))
2253 server
= ses
->server
;
2260 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
2264 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
2270 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2272 req
->InfoType
= SMB2_O_INFO_FILE
;
2273 req
->FileInfoClass
= info_class
;
2274 req
->PersistentFileId
= persistent_fid
;
2275 req
->VolatileFileId
= volatile_fid
;
2277 /* 4 for RFC1001 length and 1 for Buffer */
2279 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
2280 req
->BufferLength
= cpu_to_le32(*size
);
2282 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
2284 memcpy(req
->Buffer
, *data
, *size
);
2286 iov
[0].iov_base
= (char *)req
;
2287 /* 4 for RFC1001 length */
2288 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2290 for (i
= 1; i
< num
; i
++) {
2291 inc_rfc1001_len(req
, size
[i
]);
2292 le32_add_cpu(&req
->BufferLength
, size
[i
]);
2293 iov
[i
].iov_base
= (char *)data
[i
];
2294 iov
[i
].iov_len
= size
[i
];
2297 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
2298 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
2301 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
2303 free_rsp_buf(resp_buftype
, rsp
);
2309 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
2310 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2312 struct smb2_file_rename_info info
;
2314 unsigned int size
[2];
2316 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2318 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2322 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
2323 /* 0 = fail if target already exists */
2324 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2325 info
.FileNameLength
= cpu_to_le32(len
);
2328 size
[0] = sizeof(struct smb2_file_rename_info
);
2330 data
[1] = target_file
;
2331 size
[1] = len
+ 2 /* null */;
2333 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2334 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2341 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2342 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2344 struct smb2_file_link_info info
;
2346 unsigned int size
[2];
2348 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2350 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2354 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2355 /* 0 = fail if link already exists */
2356 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2357 info
.FileNameLength
= cpu_to_le32(len
);
2360 size
[0] = sizeof(struct smb2_file_link_info
);
2362 data
[1] = target_file
;
2363 size
[1] = len
+ 2 /* null */;
2365 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2366 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2372 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2373 u64 volatile_fid
, u32 pid
, __le64
*eof
, bool is_falloc
)
2375 struct smb2_file_eof_info info
;
2379 info
.EndOfFile
= *eof
;
2382 size
= sizeof(struct smb2_file_eof_info
);
2385 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2386 pid
, FILE_ALLOCATION_INFORMATION
, 1, &data
, &size
);
2388 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2389 pid
, FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2393 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2394 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2397 size
= sizeof(FILE_BASIC_INFO
);
2398 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2399 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2400 (void **)&buf
, &size
);
2404 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2405 const u64 persistent_fid
, const u64 volatile_fid
,
2409 struct smb2_oplock_break
*req
= NULL
;
2411 cifs_dbg(FYI
, "SMB2_oplock_break\n");
2412 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2417 req
->VolatileFid
= volatile_fid
;
2418 req
->PersistentFid
= persistent_fid
;
2419 req
->OplockLevel
= oplock_level
;
2420 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2422 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2423 /* SMB2 buffer freed by function above */
2426 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2427 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
2434 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2435 struct kstatfs
*kst
)
2437 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2438 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2439 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2440 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2441 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2446 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2447 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2450 struct smb2_query_info_req
*req
;
2452 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2454 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2457 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2461 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2462 req
->FileInfoClass
= level
;
2463 req
->PersistentFileId
= persistent_fid
;
2464 req
->VolatileFileId
= volatile_fid
;
2465 /* 4 for rfc1002 length field and 1 for pad */
2466 req
->InputBufferOffset
=
2467 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2468 req
->OutputBufferLength
= cpu_to_le32(
2469 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2471 iov
->iov_base
= (char *)req
;
2472 /* 4 for rfc1002 length field */
2473 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2478 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2479 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2481 struct smb2_query_info_rsp
*rsp
= NULL
;
2485 struct cifs_ses
*ses
= tcon
->ses
;
2486 struct smb2_fs_full_size_info
*info
= NULL
;
2488 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2489 sizeof(struct smb2_fs_full_size_info
),
2490 persistent_fid
, volatile_fid
);
2494 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2496 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2499 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2501 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2502 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2503 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2504 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2505 sizeof(struct smb2_fs_full_size_info
));
2507 copy_fs_info_to_kstatfs(info
, fsdata
);
2510 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2515 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
2516 u64 persistent_fid
, u64 volatile_fid
, int level
)
2518 struct smb2_query_info_rsp
*rsp
= NULL
;
2521 int resp_buftype
, max_len
, min_len
;
2522 struct cifs_ses
*ses
= tcon
->ses
;
2523 unsigned int rsp_len
, offset
;
2525 if (level
== FS_DEVICE_INFORMATION
) {
2526 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
2527 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
2528 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
2529 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
2530 min_len
= MIN_FS_ATTR_INFO_SIZE
;
2531 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
2532 max_len
= sizeof(struct smb3_fs_ss_info
);
2533 min_len
= sizeof(struct smb3_fs_ss_info
);
2535 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
2539 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
2540 persistent_fid
, volatile_fid
);
2544 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2546 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2549 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2551 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
2552 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
2553 rc
= validate_buf(offset
, rsp_len
, &rsp
->hdr
, min_len
);
2557 if (level
== FS_ATTRIBUTE_INFORMATION
)
2558 memcpy(&tcon
->fsAttrInfo
, 4 /* RFC1001 len */ + offset
2559 + (char *)&rsp
->hdr
, min_t(unsigned int,
2561 else if (level
== FS_DEVICE_INFORMATION
)
2562 memcpy(&tcon
->fsDevInfo
, 4 /* RFC1001 len */ + offset
2563 + (char *)&rsp
->hdr
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
2564 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
2565 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
2566 (4 /* RFC1001 len */ + offset
+ (char *)&rsp
->hdr
);
2567 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
2568 tcon
->perf_sector_size
=
2569 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
2573 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2578 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2579 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2580 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2583 struct smb2_lock_req
*req
= NULL
;
2588 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2590 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2594 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2595 req
->LockCount
= cpu_to_le16(num_lock
);
2597 req
->PersistentFileId
= persist_fid
;
2598 req
->VolatileFileId
= volatile_fid
;
2600 count
= num_lock
* sizeof(struct smb2_lock_element
);
2601 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2603 iov
[0].iov_base
= (char *)req
;
2604 /* 4 for rfc1002 length field and count for all locks */
2605 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2606 iov
[1].iov_base
= (char *)buf
;
2607 iov
[1].iov_len
= count
;
2609 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2610 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2612 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2613 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2620 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2621 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2622 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2625 struct smb2_lock_element lock
;
2627 lock
.Offset
= cpu_to_le64(offset
);
2628 lock
.Length
= cpu_to_le64(length
);
2629 lock
.Flags
= cpu_to_le32(lock_flags
);
2630 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2631 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2633 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2637 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2638 __u8
*lease_key
, const __le32 lease_state
)
2641 struct smb2_lease_ack
*req
= NULL
;
2643 cifs_dbg(FYI
, "SMB2_lease_break\n");
2644 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2649 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2650 req
->StructureSize
= cpu_to_le16(36);
2651 inc_rfc1001_len(req
, 12);
2653 memcpy(req
->LeaseKey
, lease_key
, 16);
2654 req
->LeaseState
= lease_state
;
2656 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2657 /* SMB2 buffer freed by function above */
2660 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2661 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);