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 */
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");
397 cifs_dbg(VFS
, "Illegal dialect returned by server %d\n",
398 le16_to_cpu(rsp
->DialectRevision
));
402 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
404 /* SMB2 only has an extended negflavor */
405 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
406 /* set it to the maximum buffer size value we can send with 1 credit */
407 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
408 SMB2_MAX_BUFFER_SIZE
);
409 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
410 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
411 /* BB Do we need to validate the SecurityMode? */
412 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
413 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
415 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
417 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
420 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
422 * ses->sectype = RawNTLMSSP;
423 * but for time being this is our only auth choice so doesn't matter.
424 * We just found a server which sets blob length to zero expecting raw.
426 if (blob_length
== 0)
427 cifs_dbg(FYI
, "missing security blob on negprot\n");
429 rc
= cifs_enable_signing(server
, ses
->sign
);
430 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
434 rc
= decode_neg_token_init(security_blob
, blob_length
,
445 free_rsp_buf(resp_buftype
, rsp
);
449 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
452 struct validate_negotiate_info_req vneg_inbuf
;
453 struct validate_negotiate_info_rsp
*pneg_rsp
;
456 cifs_dbg(FYI
, "validate negotiate\n");
459 * validation ioctl must be signed, so no point sending this if we
460 * can not sign it. We could eventually change this to selectively
461 * sign just this, the first and only signed request on a connection.
462 * This is good enough for now since a user who wants better security
463 * would also enable signing on the mount. Having validation of
464 * negotiate info for signed connections helps reduce attack vectors
466 if (tcon
->ses
->server
->sign
== false)
467 return 0; /* validation requires signing */
469 vneg_inbuf
.Capabilities
=
470 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
471 memcpy(vneg_inbuf
.Guid
, tcon
->ses
->server
->client_guid
,
472 SMB2_CLIENT_GUID_SIZE
);
475 vneg_inbuf
.SecurityMode
=
476 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
477 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
478 vneg_inbuf
.SecurityMode
=
479 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
481 vneg_inbuf
.SecurityMode
= 0;
483 vneg_inbuf
.DialectCount
= cpu_to_le16(1);
484 vneg_inbuf
.Dialects
[0] =
485 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
487 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
488 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
489 (char *)&vneg_inbuf
, sizeof(struct validate_negotiate_info_req
),
490 (char **)&pneg_rsp
, &rsplen
);
493 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
497 if (rsplen
!= sizeof(struct validate_negotiate_info_rsp
)) {
498 cifs_dbg(VFS
, "invalid size of protocol negotiate response\n");
502 /* check validate negotiate info response matches what we got earlier */
503 if (pneg_rsp
->Dialect
!=
504 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
))
507 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
510 /* do not validate server guid because not saved at negprot time yet */
512 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
513 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
516 /* validate negotiate successful */
517 cifs_dbg(FYI
, "validate negotiate info successful\n");
521 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
526 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
527 const struct nls_table
*nls_cp
)
529 struct smb2_sess_setup_req
*req
;
530 struct smb2_sess_setup_rsp
*rsp
= NULL
;
533 int resp_buftype
= CIFS_NO_BUFFER
;
534 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
535 struct TCP_Server_Info
*server
= ses
->server
;
538 char *ntlmssp_blob
= NULL
;
539 bool use_spnego
= false; /* else use raw ntlmssp */
541 cifs_dbg(FYI
, "Session Setup\n");
544 WARN(1, "%s: server is NULL!\n", __func__
);
549 * If we are here due to reconnect, free per-smb session key
550 * in case signing was required.
552 kfree(ses
->auth_key
.response
);
553 ses
->auth_key
.response
= NULL
;
556 * If memory allocation is successful, caller of this function
559 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
562 ses
->ntlmssp
->sesskey_per_smbsess
= true;
564 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
565 ses
->sectype
= RawNTLMSSP
;
567 ssetup_ntlmssp_authenticate
:
568 if (phase
== NtLmChallenge
)
569 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
571 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
575 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
576 req
->VcNumber
= 0; /* MBZ */
577 /* to enable echos and oplocks */
578 req
->hdr
.CreditRequest
= cpu_to_le16(3);
580 /* only one of SMB2 signing flags may be set in SMB2 request */
582 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
583 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
584 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
586 req
->SecurityMode
= 0;
588 req
->Capabilities
= 0;
589 req
->Channel
= 0; /* MBZ */
591 iov
[0].iov_base
= (char *)req
;
592 /* 4 for rfc1002 length field and 1 for pad */
593 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
594 if (phase
== NtLmNegotiate
) {
595 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
597 if (ntlmssp_blob
== NULL
) {
601 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
603 /* blob_length = build_spnego_ntlmssp_blob(
605 sizeof(struct _NEGOTIATE_MESSAGE),
607 /* BB eventually need to add this */
608 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
613 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
614 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
615 security_blob
= ntlmssp_blob
;
617 } else if (phase
== NtLmAuthenticate
) {
618 req
->hdr
.SessionId
= ses
->Suid
;
619 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
621 if (ntlmssp_blob
== NULL
) {
625 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
628 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n",
630 goto ssetup_exit
; /* BB double check error handling */
633 /* blob_length = build_spnego_ntlmssp_blob(
637 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
642 security_blob
= ntlmssp_blob
;
645 cifs_dbg(VFS
, "illegal ntlmssp phase\n");
650 /* Testing shows that buffer offset must be at location of Buffer[0] */
651 req
->SecurityBufferOffset
=
652 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
653 1 /* pad */ - 4 /* rfc1001 len */);
654 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
655 iov
[1].iov_base
= security_blob
;
656 iov
[1].iov_len
= blob_length
;
658 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
660 /* BB add code to build os and lm fields */
662 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
,
663 CIFS_LOG_ERROR
| CIFS_NEG_OP
);
665 kfree(security_blob
);
666 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
667 if (resp_buftype
!= CIFS_NO_BUFFER
&&
668 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
669 if (phase
!= NtLmNegotiate
) {
670 cifs_dbg(VFS
, "Unexpected more processing error\n");
673 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
674 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
675 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
676 le16_to_cpu(rsp
->SecurityBufferOffset
));
681 /* NTLMSSP Negotiate sent now processing challenge (response) */
682 phase
= NtLmChallenge
; /* process ntlmssp challenge */
683 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
684 ses
->Suid
= rsp
->hdr
.SessionId
;
685 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
686 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
690 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
691 * but at least the raw NTLMSSP case works.
694 * No tcon so can't do
695 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
700 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
701 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
702 cifs_dbg(VFS
, "SMB3 encryption not supported yet\n");
704 free_rsp_buf(resp_buftype
, rsp
);
706 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
707 if ((phase
== NtLmChallenge
) && (rc
== 0))
708 goto ssetup_ntlmssp_authenticate
;
711 mutex_lock(&server
->srv_mutex
);
712 if (server
->sign
&& server
->ops
->generate_signingkey
) {
713 rc
= server
->ops
->generate_signingkey(ses
);
714 kfree(ses
->auth_key
.response
);
715 ses
->auth_key
.response
= NULL
;
718 "SMB3 session key generation failed\n");
719 mutex_unlock(&server
->srv_mutex
);
723 if (!server
->session_estab
) {
724 server
->sequence_number
= 0x2;
725 server
->session_estab
= true;
727 mutex_unlock(&server
->srv_mutex
);
729 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
730 spin_lock(&GlobalMid_Lock
);
731 ses
->status
= CifsGood
;
732 ses
->need_reconnect
= false;
733 spin_unlock(&GlobalMid_Lock
);
738 kfree(ses
->auth_key
.response
);
739 ses
->auth_key
.response
= NULL
;
747 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
749 struct smb2_logoff_req
*req
; /* response is also trivial struct */
751 struct TCP_Server_Info
*server
;
753 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
755 if (ses
&& (ses
->server
))
756 server
= ses
->server
;
760 /* no need to send SMB logoff if uid already closed due to reconnect */
761 if (ses
->need_reconnect
)
762 goto smb2_session_already_dead
;
764 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
768 /* since no tcon, smb2_init can not do this, so do here */
769 req
->hdr
.SessionId
= ses
->Suid
;
771 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
773 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
775 * No tcon so can't do
776 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
779 smb2_session_already_dead
:
783 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
785 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
788 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
790 /* These are similar values to what Windows uses */
791 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
793 tcon
->max_chunks
= 256;
794 tcon
->max_bytes_chunk
= 1048576;
795 tcon
->max_bytes_copy
= 16777216;
799 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
800 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
802 struct smb2_tree_connect_req
*req
;
803 struct smb2_tree_connect_rsp
*rsp
= NULL
;
808 struct TCP_Server_Info
*server
;
809 __le16
*unc_path
= NULL
;
811 cifs_dbg(FYI
, "TCON\n");
813 if ((ses
->server
) && tree
)
814 server
= ses
->server
;
818 if (tcon
&& tcon
->bad_network_name
)
821 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
822 if (unc_path
== NULL
)
825 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
827 if (unc_path_len
< 2) {
832 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
839 /* since no tcon, smb2_init can not do this, so do here */
840 req
->hdr
.SessionId
= ses
->Suid
;
841 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
842 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
845 iov
[0].iov_base
= (char *)req
;
846 /* 4 for rfc1002 length field and 1 for pad */
847 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
849 /* Testing shows that buffer offset must be at location of Buffer[0] */
850 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
851 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
852 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
853 iov
[1].iov_base
= unc_path
;
854 iov
[1].iov_len
= unc_path_len
;
856 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
858 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
859 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
863 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
864 tcon
->need_reconnect
= true;
866 goto tcon_error_exit
;
870 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
874 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
875 cifs_dbg(FYI
, "connection to disk share\n");
876 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
878 cifs_dbg(FYI
, "connection to pipe share\n");
879 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
881 cifs_dbg(FYI
, "connection to printer\n");
883 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
885 goto tcon_error_exit
;
888 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
889 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
890 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
891 tcon
->tidStatus
= CifsGood
;
892 tcon
->need_reconnect
= false;
893 tcon
->tid
= rsp
->hdr
.TreeId
;
894 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
896 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
897 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
898 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
899 init_copy_chunk_defaults(tcon
);
900 if (tcon
->ses
->server
->ops
->validate_negotiate
)
901 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
903 free_rsp_buf(resp_buftype
, rsp
);
908 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
909 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
911 tcon
->bad_network_name
= true;
917 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
919 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
921 struct TCP_Server_Info
*server
;
922 struct cifs_ses
*ses
= tcon
->ses
;
924 cifs_dbg(FYI
, "Tree Disconnect\n");
926 if (ses
&& (ses
->server
))
927 server
= ses
->server
;
931 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
934 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
938 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
940 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
946 static struct create_durable
*
947 create_durable_buf(void)
949 struct create_durable
*buf
;
951 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
955 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
956 (struct create_durable
, Data
));
957 buf
->ccontext
.DataLength
= cpu_to_le32(16);
958 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
959 (struct create_durable
, Name
));
960 buf
->ccontext
.NameLength
= cpu_to_le16(4);
961 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
969 static struct create_durable
*
970 create_reconnect_durable_buf(struct cifs_fid
*fid
)
972 struct create_durable
*buf
;
974 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
978 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
979 (struct create_durable
, Data
));
980 buf
->ccontext
.DataLength
= cpu_to_le32(16);
981 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
982 (struct create_durable
, Name
));
983 buf
->ccontext
.NameLength
= cpu_to_le16(4);
984 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
985 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
986 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
995 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
999 struct create_context
*cc
;
1000 unsigned int next
= 0;
1003 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
1004 cc
= (struct create_context
*)data_offset
;
1006 cc
= (struct create_context
*)((char *)cc
+ next
);
1007 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1008 if (le16_to_cpu(cc
->NameLength
) != 4 ||
1009 strncmp(name
, "RqLs", 4)) {
1010 next
= le32_to_cpu(cc
->Next
);
1013 return server
->ops
->parse_lease_buf(cc
, epoch
);
1014 } while (next
!= 0);
1020 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1021 unsigned int *num_iovec
, __u8
*oplock
)
1023 struct smb2_create_req
*req
= iov
[0].iov_base
;
1024 unsigned int num
= *num_iovec
;
1026 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1027 if (iov
[num
].iov_base
== NULL
)
1029 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1030 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1031 if (!req
->CreateContextsOffset
)
1032 req
->CreateContextsOffset
= cpu_to_le32(
1033 sizeof(struct smb2_create_req
) - 4 +
1034 iov
[num
- 1].iov_len
);
1035 le32_add_cpu(&req
->CreateContextsLength
,
1036 server
->vals
->create_lease_size
);
1037 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
1038 *num_iovec
= num
+ 1;
1043 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1044 struct cifs_open_parms
*oparms
)
1046 struct smb2_create_req
*req
= iov
[0].iov_base
;
1047 unsigned int num
= *num_iovec
;
1049 if (oparms
->reconnect
) {
1050 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1051 /* indicate that we don't need to relock the file */
1052 oparms
->reconnect
= false;
1054 iov
[num
].iov_base
= create_durable_buf();
1055 if (iov
[num
].iov_base
== NULL
)
1057 iov
[num
].iov_len
= sizeof(struct create_durable
);
1058 if (!req
->CreateContextsOffset
)
1059 req
->CreateContextsOffset
=
1060 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1062 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1063 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
1064 *num_iovec
= num
+ 1;
1069 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1070 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1071 struct smb2_err_rsp
**err_buf
)
1073 struct smb2_create_req
*req
;
1074 struct smb2_create_rsp
*rsp
;
1075 struct TCP_Server_Info
*server
;
1076 struct cifs_tcon
*tcon
= oparms
->tcon
;
1077 struct cifs_ses
*ses
= tcon
->ses
;
1081 __le16
*copy_path
= NULL
;
1084 unsigned int num_iovecs
= 2;
1085 __u32 file_attributes
= 0;
1086 char *dhc_buf
= NULL
, *lc_buf
= NULL
;
1088 cifs_dbg(FYI
, "create/open\n");
1090 if (ses
&& (ses
->server
))
1091 server
= ses
->server
;
1095 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1099 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1100 file_attributes
|= ATTR_READONLY
;
1101 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
1102 file_attributes
|= ATTR_SYSTEM
;
1104 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1105 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1106 /* File attributes ignored on open (used in create though) */
1107 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1108 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1109 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1110 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1111 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1112 /* do not count rfc1001 len field */
1113 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
1115 iov
[0].iov_base
= (char *)req
;
1116 /* 4 for rfc1002 length field */
1117 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1119 /* MUST set path len (NameLength) to 0 opening root of share */
1120 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1121 /* -1 since last byte is buf[0] which is sent below (path) */
1123 if (uni_path_len
% 8 != 0) {
1124 copy_size
= uni_path_len
/ 8 * 8;
1125 if (copy_size
< uni_path_len
)
1128 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1131 memcpy((char *)copy_path
, (const char *)path
,
1133 uni_path_len
= copy_size
;
1137 iov
[1].iov_len
= uni_path_len
;
1138 iov
[1].iov_base
= path
;
1139 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1140 inc_rfc1001_len(req
, uni_path_len
- 1);
1142 if (!server
->oplocks
)
1143 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1145 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1146 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1147 req
->RequestedOplockLevel
= *oplock
;
1149 rc
= add_lease_context(server
, iov
, &num_iovecs
, oplock
);
1151 cifs_small_buf_release(req
);
1155 lc_buf
= iov
[num_iovecs
-1].iov_base
;
1158 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1159 /* need to set Next field of lease context if we request it */
1160 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
1161 struct create_context
*ccontext
=
1162 (struct create_context
*)iov
[num_iovecs
-1].iov_base
;
1164 cpu_to_le32(server
->vals
->create_lease_size
);
1166 rc
= add_durable_context(iov
, &num_iovecs
, oparms
);
1168 cifs_small_buf_release(req
);
1173 dhc_buf
= iov
[num_iovecs
-1].iov_base
;
1176 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1177 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
1180 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1182 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1187 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1188 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1191 memcpy(buf
, &rsp
->CreationTime
, 32);
1192 buf
->AllocationSize
= rsp
->AllocationSize
;
1193 buf
->EndOfFile
= rsp
->EndofFile
;
1194 buf
->Attributes
= rsp
->FileAttributes
;
1195 buf
->NumberOfLinks
= cpu_to_le32(1);
1196 buf
->DeletePending
= 0;
1199 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1200 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1202 *oplock
= rsp
->OplockLevel
;
1207 free_rsp_buf(resp_buftype
, rsp
);
1212 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1215 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1216 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, char *in_data
,
1217 u32 indatalen
, char **out_data
, u32
*plen
/* returned data len */)
1219 struct smb2_ioctl_req
*req
;
1220 struct smb2_ioctl_rsp
*rsp
;
1221 struct TCP_Server_Info
*server
;
1222 struct cifs_ses
*ses
= tcon
->ses
;
1228 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1230 if (out_data
!= NULL
)
1233 /* zero out returned data len, in case of error */
1237 if (ses
&& (ses
->server
))
1238 server
= ses
->server
;
1242 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1246 req
->CtlCode
= cpu_to_le32(opcode
);
1247 req
->PersistentFileId
= persistent_fid
;
1248 req
->VolatileFileId
= volatile_fid
;
1251 req
->InputCount
= cpu_to_le32(indatalen
);
1252 /* do not set InputOffset if no input data */
1254 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1255 iov
[1].iov_base
= in_data
;
1256 iov
[1].iov_len
= indatalen
;
1261 req
->OutputOffset
= 0;
1262 req
->OutputCount
= 0; /* MBZ */
1265 * Could increase MaxOutputResponse, but that would require more
1266 * than one credit. Windows typically sets this smaller, but for some
1267 * ioctls it may be useful to allow server to send more. No point
1268 * limiting what the server can send as long as fits in one credit
1270 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1273 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1277 iov
[0].iov_base
= (char *)req
;
1280 * If no input data, the size of ioctl struct in
1281 * protocol spec still includes a 1 byte data buffer,
1282 * but if input data passed to ioctl, we do not
1283 * want to double count this, so we do not send
1284 * the dummy one byte of data in iovec[0] if sending
1285 * input data (in iovec[1]). We also must add 4 bytes
1286 * in first iovec to allow for rfc1002 length field.
1290 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1291 inc_rfc1001_len(req
, indatalen
- 1);
1293 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1296 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1297 rsp
= (struct smb2_ioctl_rsp
*)iov
[0].iov_base
;
1299 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
1301 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1303 } else if (rc
== -EINVAL
) {
1304 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
1305 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
1307 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1312 /* check if caller wants to look at return data or just return rc */
1313 if ((plen
== NULL
) || (out_data
== NULL
))
1316 *plen
= le32_to_cpu(rsp
->OutputCount
);
1318 /* We check for obvious errors in the output buffer length and offset */
1320 goto ioctl_exit
; /* server returned no data */
1321 else if (*plen
> 0xFF00) {
1322 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1328 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1329 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1330 le32_to_cpu(rsp
->OutputOffset
));
1336 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1337 if (*out_data
== NULL
) {
1342 memcpy(*out_data
, rsp
->hdr
.ProtocolId
+ le32_to_cpu(rsp
->OutputOffset
),
1345 free_rsp_buf(resp_buftype
, rsp
);
1350 * Individual callers to ioctl worker function follow
1354 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
1355 u64 persistent_fid
, u64 volatile_fid
)
1358 struct compress_ioctl fsctl_input
;
1359 char *ret_data
= NULL
;
1361 fsctl_input
.CompressionState
=
1362 __constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
1364 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
1365 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
1366 (char *)&fsctl_input
/* data input */,
1367 2 /* in data len */, &ret_data
/* out data */, NULL
);
1369 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
1375 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1376 u64 persistent_fid
, u64 volatile_fid
)
1378 struct smb2_close_req
*req
;
1379 struct smb2_close_rsp
*rsp
;
1380 struct TCP_Server_Info
*server
;
1381 struct cifs_ses
*ses
= tcon
->ses
;
1386 cifs_dbg(FYI
, "Close\n");
1388 if (ses
&& (ses
->server
))
1389 server
= ses
->server
;
1393 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1397 req
->PersistentFileId
= persistent_fid
;
1398 req
->VolatileFileId
= volatile_fid
;
1400 iov
[0].iov_base
= (char *)req
;
1401 /* 4 for rfc1002 length field */
1402 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1404 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1405 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
) + PATH_MAX
* 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
->got_bytes
);
1731 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
1733 case MID_REQUEST_SUBMITTED
:
1734 case MID_RETRY_NEEDED
:
1735 rdata
->result
= -EAGAIN
;
1736 if (server
->sign
&& rdata
->got_bytes
)
1737 /* reset bytes number since we can not check a sign */
1738 rdata
->got_bytes
= 0;
1739 /* FIXME: should this be counted toward the initiating task? */
1740 task_io_account_read(rdata
->got_bytes
);
1741 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
1744 if (rdata
->result
!= -ENODATA
)
1745 rdata
->result
= -EIO
;
1749 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1751 queue_work(cifsiod_wq
, &rdata
->work
);
1752 DeleteMidQEntry(mid
);
1753 add_credits(server
, credits_received
, 0);
1756 /* smb2_async_readv - send an async write, and set up mid to handle result */
1758 smb2_async_readv(struct cifs_readdata
*rdata
)
1761 struct smb2_hdr
*buf
;
1762 struct cifs_io_parms io_parms
;
1763 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1765 struct TCP_Server_Info
*server
;
1767 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
1768 __func__
, rdata
->offset
, rdata
->bytes
);
1770 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1771 io_parms
.offset
= rdata
->offset
;
1772 io_parms
.length
= rdata
->bytes
;
1773 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1774 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1775 io_parms
.pid
= rdata
->pid
;
1777 server
= io_parms
.tcon
->ses
->server
;
1779 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1781 if (rc
== -EAGAIN
&& rdata
->credits
) {
1782 /* credits was reset by reconnect */
1784 /* reduce in_flight value since we won't send the req */
1785 spin_lock(&server
->req_lock
);
1786 server
->in_flight
--;
1787 spin_unlock(&server
->req_lock
);
1792 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1793 /* 4 for rfc1002 length field */
1794 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1796 if (rdata
->credits
) {
1797 buf
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
1798 SMB2_MAX_BUFFER_SIZE
));
1799 spin_lock(&server
->req_lock
);
1800 server
->credits
+= rdata
->credits
-
1801 le16_to_cpu(buf
->CreditCharge
);
1802 spin_unlock(&server
->req_lock
);
1803 wake_up(&server
->request_q
);
1804 flags
= CIFS_HAS_CREDITS
;
1807 kref_get(&rdata
->refcount
);
1808 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1809 cifs_readv_receive
, smb2_readv_callback
,
1812 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1813 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1816 cifs_small_buf_release(buf
);
1821 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1822 unsigned int *nbytes
, char **buf
, int *buf_type
)
1824 int resp_buftype
, rc
= -EACCES
;
1825 struct smb2_read_rsp
*rsp
= NULL
;
1829 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1833 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1834 &resp_buftype
, CIFS_LOG_ERROR
);
1836 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1838 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1839 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1844 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1845 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
1847 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1848 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1849 (*nbytes
> io_parms
->length
)) {
1850 cifs_dbg(FYI
, "bad length %d for count %d\n",
1851 *nbytes
, io_parms
->length
);
1858 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1860 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1861 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1862 *buf
= iov
[0].iov_base
;
1863 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1864 *buf_type
= CIFS_SMALL_BUFFER
;
1865 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1866 *buf_type
= CIFS_LARGE_BUFFER
;
1872 * Check the mid_state and signature on received buffer (if any), and queue the
1873 * workqueue completion task.
1876 smb2_writev_callback(struct mid_q_entry
*mid
)
1878 struct cifs_writedata
*wdata
= mid
->callback_data
;
1879 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1880 unsigned int written
;
1881 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1882 unsigned int credits_received
= 1;
1884 switch (mid
->mid_state
) {
1885 case MID_RESPONSE_RECEIVED
:
1886 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1887 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1888 if (wdata
->result
!= 0)
1891 written
= le32_to_cpu(rsp
->DataLength
);
1893 * Mask off high 16 bits when bytes written as returned
1894 * by the server is greater than bytes requested by the
1895 * client. OS/2 servers are known to set incorrect
1898 if (written
> wdata
->bytes
)
1901 if (written
< wdata
->bytes
)
1902 wdata
->result
= -ENOSPC
;
1904 wdata
->bytes
= written
;
1906 case MID_REQUEST_SUBMITTED
:
1907 case MID_RETRY_NEEDED
:
1908 wdata
->result
= -EAGAIN
;
1911 wdata
->result
= -EIO
;
1916 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1918 queue_work(cifsiod_wq
, &wdata
->work
);
1919 DeleteMidQEntry(mid
);
1920 add_credits(tcon
->ses
->server
, credits_received
, 0);
1923 /* smb2_async_writev - send an async write, and set up mid to handle result */
1925 smb2_async_writev(struct cifs_writedata
*wdata
,
1926 void (*release
)(struct kref
*kref
))
1928 int rc
= -EACCES
, flags
= 0;
1929 struct smb2_write_req
*req
= NULL
;
1930 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1931 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1933 struct smb_rqst rqst
;
1935 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1937 if (rc
== -EAGAIN
&& wdata
->credits
) {
1938 /* credits was reset by reconnect */
1940 /* reduce in_flight value since we won't send the req */
1941 spin_lock(&server
->req_lock
);
1942 server
->in_flight
--;
1943 spin_unlock(&server
->req_lock
);
1945 goto async_writev_out
;
1948 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1950 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1951 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1952 req
->WriteChannelInfoOffset
= 0;
1953 req
->WriteChannelInfoLength
= 0;
1955 req
->Offset
= cpu_to_le64(wdata
->offset
);
1956 /* 4 for rfc1002 length field */
1957 req
->DataOffset
= cpu_to_le16(
1958 offsetof(struct smb2_write_req
, Buffer
) - 4);
1959 req
->RemainingBytes
= 0;
1961 /* 4 for rfc1002 length field and 1 for Buffer */
1962 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1967 rqst
.rq_pages
= wdata
->pages
;
1968 rqst
.rq_npages
= wdata
->nr_pages
;
1969 rqst
.rq_pagesz
= wdata
->pagesz
;
1970 rqst
.rq_tailsz
= wdata
->tailsz
;
1972 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
1973 wdata
->offset
, wdata
->bytes
);
1975 req
->Length
= cpu_to_le32(wdata
->bytes
);
1977 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1979 if (wdata
->credits
) {
1980 req
->hdr
.CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
1981 SMB2_MAX_BUFFER_SIZE
));
1982 spin_lock(&server
->req_lock
);
1983 server
->credits
+= wdata
->credits
-
1984 le16_to_cpu(req
->hdr
.CreditCharge
);
1985 spin_unlock(&server
->req_lock
);
1986 wake_up(&server
->request_q
);
1987 flags
= CIFS_HAS_CREDITS
;
1990 kref_get(&wdata
->refcount
);
1991 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, wdata
,
1995 kref_put(&wdata
->refcount
, release
);
1996 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2000 cifs_small_buf_release(req
);
2005 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2006 * The length field from io_parms must be at least 1 and indicates a number of
2007 * elements with data to write that begins with position 1 in iov array. All
2008 * data length is specified by count.
2011 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2012 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
2015 struct smb2_write_req
*req
= NULL
;
2016 struct smb2_write_rsp
*rsp
= NULL
;
2023 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
2027 if (io_parms
->tcon
->ses
->server
== NULL
)
2028 return -ECONNABORTED
;
2030 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
2032 req
->PersistentFileId
= io_parms
->persistent_fid
;
2033 req
->VolatileFileId
= io_parms
->volatile_fid
;
2034 req
->WriteChannelInfoOffset
= 0;
2035 req
->WriteChannelInfoLength
= 0;
2037 req
->Length
= cpu_to_le32(io_parms
->length
);
2038 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2039 /* 4 for rfc1002 length field */
2040 req
->DataOffset
= cpu_to_le16(
2041 offsetof(struct smb2_write_req
, Buffer
) - 4);
2042 req
->RemainingBytes
= 0;
2044 iov
[0].iov_base
= (char *)req
;
2045 /* 4 for rfc1002 length field and 1 for Buffer */
2046 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2048 /* length of entire message including data to be written */
2049 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
2051 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
2053 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
2056 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
2057 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
2059 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2061 free_rsp_buf(resp_buftype
, rsp
);
2066 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
2069 unsigned int entrycount
= 0;
2070 unsigned int next_offset
= 0;
2071 FILE_DIRECTORY_INFO
*entryptr
;
2073 if (bufstart
== NULL
)
2076 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
2079 entryptr
= (FILE_DIRECTORY_INFO
*)
2080 ((char *)entryptr
+ next_offset
);
2082 if ((char *)entryptr
+ size
> end_of_buf
) {
2083 cifs_dbg(VFS
, "malformed search entry would overflow\n");
2087 len
= le32_to_cpu(entryptr
->FileNameLength
);
2088 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
2089 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
2094 *lastentry
= (char *)entryptr
;
2097 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
2109 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
2110 u64 persistent_fid
, u64 volatile_fid
, int index
,
2111 struct cifs_search_info
*srch_inf
)
2113 struct smb2_query_directory_req
*req
;
2114 struct smb2_query_directory_rsp
*rsp
= NULL
;
2119 unsigned char *bufptr
;
2120 struct TCP_Server_Info
*server
;
2121 struct cifs_ses
*ses
= tcon
->ses
;
2122 __le16 asteriks
= cpu_to_le16('*');
2124 unsigned int output_size
= CIFSMaxBufSize
;
2125 size_t info_buf_size
;
2127 if (ses
&& (ses
->server
))
2128 server
= ses
->server
;
2132 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
2136 switch (srch_inf
->info_level
) {
2137 case SMB_FIND_FILE_DIRECTORY_INFO
:
2138 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
2139 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
2141 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
2142 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
2143 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
2146 cifs_dbg(VFS
, "info level %u isn't supported\n",
2147 srch_inf
->info_level
);
2152 req
->FileIndex
= cpu_to_le32(index
);
2153 req
->PersistentFileId
= persistent_fid
;
2154 req
->VolatileFileId
= volatile_fid
;
2157 bufptr
= req
->Buffer
;
2158 memcpy(bufptr
, &asteriks
, len
);
2160 req
->FileNameOffset
=
2161 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
2162 req
->FileNameLength
= cpu_to_le16(len
);
2164 * BB could be 30 bytes or so longer if we used SMB2 specific
2165 * buffer lengths, but this is safe and close enough.
2167 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
2168 output_size
= min_t(unsigned int, output_size
, 2 << 15);
2169 req
->OutputBufferLength
= cpu_to_le32(output_size
);
2171 iov
[0].iov_base
= (char *)req
;
2172 /* 4 for RFC1001 length and 1 for Buffer */
2173 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2175 iov
[1].iov_base
= (char *)(req
->Buffer
);
2176 iov
[1].iov_len
= len
;
2178 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
2180 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
2181 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
2184 if (rc
== -ENODATA
&& rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
) {
2185 srch_inf
->endOfSearch
= true;
2188 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
2192 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2193 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2198 srch_inf
->unicode
= true;
2200 if (srch_inf
->ntwrk_buf_start
) {
2201 if (srch_inf
->smallBuf
)
2202 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
2204 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
2206 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
2207 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
2208 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
2209 /* 4 for rfc1002 length field */
2210 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
2211 srch_inf
->entries_in_buffer
=
2212 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
2213 &srch_inf
->last_entry
, info_buf_size
);
2214 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
2215 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
2216 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
2217 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
2218 if (resp_buftype
== CIFS_LARGE_BUFFER
)
2219 srch_inf
->smallBuf
= false;
2220 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
2221 srch_inf
->smallBuf
= true;
2223 cifs_dbg(VFS
, "illegal search buffer type\n");
2228 free_rsp_buf(resp_buftype
, rsp
);
2233 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2234 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
2235 unsigned int num
, void **data
, unsigned int *size
)
2237 struct smb2_set_info_req
*req
;
2238 struct smb2_set_info_rsp
*rsp
= NULL
;
2243 struct TCP_Server_Info
*server
;
2244 struct cifs_ses
*ses
= tcon
->ses
;
2246 if (ses
&& (ses
->server
))
2247 server
= ses
->server
;
2254 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
2258 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
2264 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2266 req
->InfoType
= SMB2_O_INFO_FILE
;
2267 req
->FileInfoClass
= info_class
;
2268 req
->PersistentFileId
= persistent_fid
;
2269 req
->VolatileFileId
= volatile_fid
;
2271 /* 4 for RFC1001 length and 1 for Buffer */
2273 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
2274 req
->BufferLength
= cpu_to_le32(*size
);
2276 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
2278 memcpy(req
->Buffer
, *data
, *size
);
2280 iov
[0].iov_base
= (char *)req
;
2281 /* 4 for RFC1001 length */
2282 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2284 for (i
= 1; i
< num
; i
++) {
2285 inc_rfc1001_len(req
, size
[i
]);
2286 le32_add_cpu(&req
->BufferLength
, size
[i
]);
2287 iov
[i
].iov_base
= (char *)data
[i
];
2288 iov
[i
].iov_len
= size
[i
];
2291 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
2292 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
2295 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
2297 free_rsp_buf(resp_buftype
, rsp
);
2303 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
2304 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2306 struct smb2_file_rename_info info
;
2308 unsigned int size
[2];
2310 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2312 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2316 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
2317 /* 0 = fail if target already exists */
2318 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2319 info
.FileNameLength
= cpu_to_le32(len
);
2322 size
[0] = sizeof(struct smb2_file_rename_info
);
2324 data
[1] = target_file
;
2325 size
[1] = len
+ 2 /* null */;
2327 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2328 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2335 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2336 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2338 struct smb2_file_link_info info
;
2340 unsigned int size
[2];
2342 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2344 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2348 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2349 /* 0 = fail if link already exists */
2350 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2351 info
.FileNameLength
= cpu_to_le32(len
);
2354 size
[0] = sizeof(struct smb2_file_link_info
);
2356 data
[1] = target_file
;
2357 size
[1] = len
+ 2 /* null */;
2359 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2360 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2366 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2367 u64 volatile_fid
, u32 pid
, __le64
*eof
, bool is_falloc
)
2369 struct smb2_file_eof_info info
;
2373 info
.EndOfFile
= *eof
;
2376 size
= sizeof(struct smb2_file_eof_info
);
2379 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2380 pid
, FILE_ALLOCATION_INFORMATION
, 1, &data
, &size
);
2382 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2383 pid
, FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2387 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2388 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2391 size
= sizeof(FILE_BASIC_INFO
);
2392 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2393 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2394 (void **)&buf
, &size
);
2398 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2399 const u64 persistent_fid
, const u64 volatile_fid
,
2403 struct smb2_oplock_break
*req
= NULL
;
2405 cifs_dbg(FYI
, "SMB2_oplock_break\n");
2406 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2411 req
->VolatileFid
= volatile_fid
;
2412 req
->PersistentFid
= persistent_fid
;
2413 req
->OplockLevel
= oplock_level
;
2414 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2416 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2417 /* SMB2 buffer freed by function above */
2420 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2421 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
2428 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2429 struct kstatfs
*kst
)
2431 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2432 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2433 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2434 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2435 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2440 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2441 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2444 struct smb2_query_info_req
*req
;
2446 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2448 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2451 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2455 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2456 req
->FileInfoClass
= level
;
2457 req
->PersistentFileId
= persistent_fid
;
2458 req
->VolatileFileId
= volatile_fid
;
2459 /* 4 for rfc1002 length field and 1 for pad */
2460 req
->InputBufferOffset
=
2461 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2462 req
->OutputBufferLength
= cpu_to_le32(
2463 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2465 iov
->iov_base
= (char *)req
;
2466 /* 4 for rfc1002 length field */
2467 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2472 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2473 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2475 struct smb2_query_info_rsp
*rsp
= NULL
;
2479 struct cifs_ses
*ses
= tcon
->ses
;
2480 struct smb2_fs_full_size_info
*info
= NULL
;
2482 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2483 sizeof(struct smb2_fs_full_size_info
),
2484 persistent_fid
, volatile_fid
);
2488 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2490 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2493 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2495 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2496 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2497 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2498 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2499 sizeof(struct smb2_fs_full_size_info
));
2501 copy_fs_info_to_kstatfs(info
, fsdata
);
2504 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2509 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
2510 u64 persistent_fid
, u64 volatile_fid
, int level
)
2512 struct smb2_query_info_rsp
*rsp
= NULL
;
2515 int resp_buftype
, max_len
, min_len
;
2516 struct cifs_ses
*ses
= tcon
->ses
;
2517 unsigned int rsp_len
, offset
;
2519 if (level
== FS_DEVICE_INFORMATION
) {
2520 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
2521 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
2522 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
2523 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
2524 min_len
= MIN_FS_ATTR_INFO_SIZE
;
2525 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
2526 max_len
= sizeof(struct smb3_fs_ss_info
);
2527 min_len
= sizeof(struct smb3_fs_ss_info
);
2529 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
2533 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
2534 persistent_fid
, volatile_fid
);
2538 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2540 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2543 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2545 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
2546 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
2547 rc
= validate_buf(offset
, rsp_len
, &rsp
->hdr
, min_len
);
2551 if (level
== FS_ATTRIBUTE_INFORMATION
)
2552 memcpy(&tcon
->fsAttrInfo
, 4 /* RFC1001 len */ + offset
2553 + (char *)&rsp
->hdr
, min_t(unsigned int,
2555 else if (level
== FS_DEVICE_INFORMATION
)
2556 memcpy(&tcon
->fsDevInfo
, 4 /* RFC1001 len */ + offset
2557 + (char *)&rsp
->hdr
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
2558 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
2559 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
2560 (4 /* RFC1001 len */ + offset
+ (char *)&rsp
->hdr
);
2561 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
2562 tcon
->perf_sector_size
=
2563 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
2567 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2572 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2573 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2574 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2577 struct smb2_lock_req
*req
= NULL
;
2582 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2584 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2588 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2589 req
->LockCount
= cpu_to_le16(num_lock
);
2591 req
->PersistentFileId
= persist_fid
;
2592 req
->VolatileFileId
= volatile_fid
;
2594 count
= num_lock
* sizeof(struct smb2_lock_element
);
2595 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2597 iov
[0].iov_base
= (char *)req
;
2598 /* 4 for rfc1002 length field and count for all locks */
2599 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2600 iov
[1].iov_base
= (char *)buf
;
2601 iov
[1].iov_len
= count
;
2603 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2604 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2606 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2607 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2614 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2615 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2616 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2619 struct smb2_lock_element lock
;
2621 lock
.Offset
= cpu_to_le64(offset
);
2622 lock
.Length
= cpu_to_le64(length
);
2623 lock
.Flags
= cpu_to_le32(lock_flags
);
2624 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2625 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2627 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2631 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2632 __u8
*lease_key
, const __le32 lease_state
)
2635 struct smb2_lease_ack
*req
= NULL
;
2637 cifs_dbg(FYI
, "SMB2_lease_break\n");
2638 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2643 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2644 req
->StructureSize
= cpu_to_le16(36);
2645 inc_rfc1001_len(req
, 12);
2647 memcpy(req
->LeaseKey
, lease_key
, 16);
2648 req
->LeaseState
= lease_state
;
2650 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2651 /* SMB2 buffer freed by function above */
2654 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2655 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);