4 * Copyright (C) International Business Machines Corp., 2009, 2013
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
9 * Contains the routines for constructing the SMB2 PDUs themselves
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
32 #include <linux/kernel.h>
33 #include <linux/vfs.h>
34 #include <linux/task_io_accounting_ops.h>
35 #include <linux/uaccess.h>
36 #include <linux/pagemap.h>
37 #include <linux/xattr.h>
41 #include "cifsproto.h"
42 #include "smb2proto.h"
43 #include "cifs_unicode.h"
44 #include "cifs_debug.h"
46 #include "smb2status.h"
51 * The following table defines the expected "StructureSize" of SMB2 requests
52 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
54 * Note that commands are defined in smb2pdu.h in le16 but the array below is
55 * indexed by command in host byte order.
57 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
58 /* SMB2_NEGOTIATE */ 36,
59 /* SMB2_SESSION_SETUP */ 25,
61 /* SMB2_TREE_CONNECT */ 9,
62 /* SMB2_TREE_DISCONNECT */ 4,
72 /* SMB2_QUERY_DIRECTORY */ 33,
73 /* SMB2_CHANGE_NOTIFY */ 32,
74 /* SMB2_QUERY_INFO */ 41,
75 /* SMB2_SET_INFO */ 33,
76 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
81 smb2_hdr_assemble(struct smb2_hdr
*hdr
, __le16 smb2_cmd
/* command */ ,
82 const struct cifs_tcon
*tcon
)
84 struct smb2_pdu
*pdu
= (struct smb2_pdu
*)hdr
;
85 char *temp
= (char *)hdr
;
86 /* lookup word count ie StructureSize from table */
87 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_cmd
)];
90 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
91 * largest operations (Create)
95 /* Note this is only network field converted to big endian */
96 hdr
->smb2_buf_length
= cpu_to_be32(parmsize
+ sizeof(struct smb2_hdr
)
97 - 4 /* RFC 1001 length field itself not counted */);
99 hdr
->ProtocolId
[0] = 0xFE;
100 hdr
->ProtocolId
[1] = 'S';
101 hdr
->ProtocolId
[2] = 'M';
102 hdr
->ProtocolId
[3] = 'B';
103 hdr
->StructureSize
= cpu_to_le16(64);
104 hdr
->Command
= smb2_cmd
;
105 hdr
->CreditRequest
= cpu_to_le16(2); /* BB make this dynamic */
106 hdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
111 /* BB FIXME when we do write > 64K add +1 for every 64K in req or rsp */
112 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
113 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
115 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
116 hdr
->CreditCharge
= cpu_to_le16(1);
117 /* else CreditCharge MBZ */
119 hdr
->TreeId
= tcon
->tid
;
120 /* Uid is not converted */
122 hdr
->SessionId
= tcon
->ses
->Suid
;
125 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
126 * to pass the path on the Open SMB prefixed by \\server\share.
127 * Not sure when we would need to do the augmented path (if ever) and
128 * setting this flag breaks the SMB2 open operation since it is
129 * illegal to send an empty path name (without \\server\share prefix)
130 * when the DFS flag is set in the SMB open header. We could
131 * consider setting the flag on all operations other than open
132 * but it is safer to net set it for now.
134 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
135 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
137 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
)
138 hdr
->Flags
|= SMB2_FLAGS_SIGNED
;
140 pdu
->StructureSize2
= cpu_to_le16(parmsize
);
145 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
148 struct nls_table
*nls_codepage
;
149 struct cifs_ses
*ses
;
150 struct TCP_Server_Info
*server
;
153 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
154 * check for tcp and smb session status done differently
155 * for those three - in the calling routine.
160 if (smb2_command
== SMB2_TREE_CONNECT
)
163 if (tcon
->tidStatus
== CifsExiting
) {
165 * only tree disconnect, open, and write,
166 * (and ulogoff which does not have tcon)
167 * are allowed as we start force umount.
169 if ((smb2_command
!= SMB2_WRITE
) &&
170 (smb2_command
!= SMB2_CREATE
) &&
171 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
172 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
177 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
178 (!tcon
->ses
->server
))
182 server
= ses
->server
;
185 * Give demultiplex thread up to 10 seconds to reconnect, should be
186 * greater than cifs socket timeout which is 7 seconds
188 while (server
->tcpStatus
== CifsNeedReconnect
) {
190 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
191 * here since they are implicitly done when session drops.
193 switch (smb2_command
) {
195 * BB Should we keep oplock break and add flush to exceptions?
197 case SMB2_TREE_DISCONNECT
:
200 case SMB2_OPLOCK_BREAK
:
204 wait_event_interruptible_timeout(server
->response_q
,
205 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
207 /* are we still trying to reconnect? */
208 if (server
->tcpStatus
!= CifsNeedReconnect
)
212 * on "soft" mounts we wait once. Hard mounts keep
213 * retrying until process is killed or server comes
217 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
222 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
225 nls_codepage
= load_nls_default();
228 * need to prevent multiple threads trying to simultaneously reconnect
229 * the same SMB session
231 mutex_lock(&tcon
->ses
->session_mutex
);
232 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
233 if (!rc
&& tcon
->ses
->need_reconnect
)
234 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
236 if (rc
|| !tcon
->need_reconnect
) {
237 mutex_unlock(&tcon
->ses
->session_mutex
);
241 cifs_mark_open_files_invalid(tcon
);
242 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
243 mutex_unlock(&tcon
->ses
->session_mutex
);
244 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
247 atomic_inc(&tconInfoReconnectCount
);
249 * BB FIXME add code to check if wsize needs update due to negotiated
250 * smb buffer size shrinking.
254 * Check if handle based operation so we know whether we can continue
255 * or not without returning to caller to reset file handle.
258 * BB Is flush done by server on drop of tcp session? Should we special
259 * case it and skip above?
261 switch (smb2_command
) {
267 case SMB2_QUERY_DIRECTORY
:
268 case SMB2_CHANGE_NOTIFY
:
269 case SMB2_QUERY_INFO
:
273 unload_nls(nls_codepage
);
278 * Allocate and return pointer to an SMB request hdr, and set basic
279 * SMB information in the SMB header. If the return code is zero, this
280 * function must have filled in request_buf pointer.
283 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
288 rc
= smb2_reconnect(smb2_command
, tcon
);
292 /* BB eventually switch this to SMB2 specific small buf size */
293 *request_buf
= cifs_small_buf_get();
294 if (*request_buf
== NULL
) {
295 /* BB should we add a retry in here if not a writepage? */
299 smb2_hdr_assemble((struct smb2_hdr
*) *request_buf
, smb2_command
, tcon
);
302 #ifdef CONFIG_CIFS_STATS2
303 uint16_t com_code
= le16_to_cpu(smb2_command
);
304 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
306 cifs_stats_inc(&tcon
->num_smbs_sent
);
313 free_rsp_buf(int resp_buftype
, void *rsp
)
315 if (resp_buftype
== CIFS_SMALL_BUFFER
)
316 cifs_small_buf_release(rsp
);
317 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
318 cifs_buf_release(rsp
);
324 * SMB2 Worker functions follow:
326 * The general structure of the worker functions is:
327 * 1) Call smb2_init (assembles SMB2 header)
328 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
329 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
330 * 4) Decode SMB2 command specific fields in the fixed length area
331 * 5) Decode variable length data area (if any for this SMB2 command type)
332 * 6) Call free smb buffer
338 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
340 struct smb2_negotiate_req
*req
;
341 struct smb2_negotiate_rsp
*rsp
;
345 struct TCP_Server_Info
*server
= ses
->server
;
346 int blob_offset
, blob_length
;
348 int flags
= CIFS_NEG_OP
;
350 cifs_dbg(FYI
, "Negotiate protocol\n");
353 WARN(1, "%s: server is NULL!\n", __func__
);
357 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
361 req
->hdr
.SessionId
= 0;
363 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
365 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
366 inc_rfc1001_len(req
, 2);
368 /* only one of SMB2 signing flags may be set in SMB2 request */
370 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
371 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
372 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
374 req
->SecurityMode
= 0;
376 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
378 memcpy(req
->ClientGUID
, server
->client_guid
, SMB2_CLIENT_GUID_SIZE
);
380 iov
[0].iov_base
= (char *)req
;
381 /* 4 for rfc1002 length field */
382 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
384 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
);
386 rsp
= (struct smb2_negotiate_rsp
*)iov
[0].iov_base
;
388 * No tcon so can't do
389 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
394 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
396 /* BB we may eventually want to match the negotiated vs. requested
397 dialect, even though we are only requesting one at a time */
398 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
399 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
400 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
401 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
402 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
403 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
404 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
405 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
407 cifs_dbg(VFS
, "Illegal dialect returned by server %d\n",
408 le16_to_cpu(rsp
->DialectRevision
));
412 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
414 /* SMB2 only has an extended negflavor */
415 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
416 /* set it to the maximum buffer size value we can send with 1 credit */
417 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
418 SMB2_MAX_BUFFER_SIZE
);
419 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
420 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
421 /* BB Do we need to validate the SecurityMode? */
422 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
423 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
425 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
427 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
430 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
432 * ses->sectype = RawNTLMSSP;
433 * but for time being this is our only auth choice so doesn't matter.
434 * We just found a server which sets blob length to zero expecting raw.
436 if (blob_length
== 0)
437 cifs_dbg(FYI
, "missing security blob on negprot\n");
439 rc
= cifs_enable_signing(server
, ses
->sign
);
440 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
444 rc
= decode_neg_token_init(security_blob
, blob_length
,
455 free_rsp_buf(resp_buftype
, rsp
);
459 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
462 struct validate_negotiate_info_req vneg_inbuf
;
463 struct validate_negotiate_info_rsp
*pneg_rsp
;
466 cifs_dbg(FYI
, "validate negotiate\n");
469 * validation ioctl must be signed, so no point sending this if we
470 * can not sign it. We could eventually change this to selectively
471 * sign just this, the first and only signed request on a connection.
472 * This is good enough for now since a user who wants better security
473 * would also enable signing on the mount. Having validation of
474 * negotiate info for signed connections helps reduce attack vectors
476 if (tcon
->ses
->server
->sign
== false)
477 return 0; /* validation requires signing */
479 vneg_inbuf
.Capabilities
=
480 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
481 memcpy(vneg_inbuf
.Guid
, tcon
->ses
->server
->client_guid
,
482 SMB2_CLIENT_GUID_SIZE
);
485 vneg_inbuf
.SecurityMode
=
486 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
487 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
488 vneg_inbuf
.SecurityMode
=
489 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
491 vneg_inbuf
.SecurityMode
= 0;
493 vneg_inbuf
.DialectCount
= cpu_to_le16(1);
494 vneg_inbuf
.Dialects
[0] =
495 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
497 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
498 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
499 (char *)&vneg_inbuf
, sizeof(struct validate_negotiate_info_req
),
500 (char **)&pneg_rsp
, &rsplen
);
503 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
507 if (rsplen
!= sizeof(struct validate_negotiate_info_rsp
)) {
508 cifs_dbg(VFS
, "invalid size of protocol negotiate response\n");
512 /* check validate negotiate info response matches what we got earlier */
513 if (pneg_rsp
->Dialect
!=
514 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
))
517 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
520 /* do not validate server guid because not saved at negprot time yet */
522 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
523 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
526 /* validate negotiate successful */
527 cifs_dbg(FYI
, "validate negotiate info successful\n");
531 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
536 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
537 const struct nls_table
*nls_cp
)
539 struct smb2_sess_setup_req
*req
;
540 struct smb2_sess_setup_rsp
*rsp
= NULL
;
544 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
545 struct TCP_Server_Info
*server
= ses
->server
;
548 char *ntlmssp_blob
= NULL
;
549 bool use_spnego
= false; /* else use raw ntlmssp */
551 cifs_dbg(FYI
, "Session Setup\n");
554 WARN(1, "%s: server is NULL!\n", __func__
);
559 * If we are here due to reconnect, free per-smb session key
560 * in case signing was required.
562 kfree(ses
->auth_key
.response
);
563 ses
->auth_key
.response
= NULL
;
566 * If memory allocation is successful, caller of this function
569 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
572 ses
->ntlmssp
->sesskey_per_smbsess
= true;
574 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
575 ses
->sectype
= RawNTLMSSP
;
577 ssetup_ntlmssp_authenticate
:
578 if (phase
== NtLmChallenge
)
579 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
581 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
585 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
586 req
->VcNumber
= 0; /* MBZ */
587 /* to enable echos and oplocks */
588 req
->hdr
.CreditRequest
= cpu_to_le16(3);
590 /* only one of SMB2 signing flags may be set in SMB2 request */
592 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
593 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
594 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
596 req
->SecurityMode
= 0;
598 req
->Capabilities
= 0;
599 req
->Channel
= 0; /* MBZ */
601 iov
[0].iov_base
= (char *)req
;
602 /* 4 for rfc1002 length field and 1 for pad */
603 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
604 if (phase
== NtLmNegotiate
) {
605 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
607 if (ntlmssp_blob
== NULL
) {
611 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
613 /* blob_length = build_spnego_ntlmssp_blob(
615 sizeof(struct _NEGOTIATE_MESSAGE),
617 /* BB eventually need to add this */
618 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
623 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
624 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
625 security_blob
= ntlmssp_blob
;
627 } else if (phase
== NtLmAuthenticate
) {
628 req
->hdr
.SessionId
= ses
->Suid
;
629 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
631 if (ntlmssp_blob
== NULL
) {
635 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
638 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n",
640 goto ssetup_exit
; /* BB double check error handling */
643 /* blob_length = build_spnego_ntlmssp_blob(
647 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
652 security_blob
= ntlmssp_blob
;
655 cifs_dbg(VFS
, "illegal ntlmssp phase\n");
660 /* Testing shows that buffer offset must be at location of Buffer[0] */
661 req
->SecurityBufferOffset
=
662 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
663 1 /* pad */ - 4 /* rfc1001 len */);
664 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
665 iov
[1].iov_base
= security_blob
;
666 iov
[1].iov_len
= blob_length
;
668 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
670 /* BB add code to build os and lm fields */
672 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
,
673 CIFS_LOG_ERROR
| CIFS_NEG_OP
);
675 kfree(security_blob
);
676 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
677 if (resp_buftype
!= CIFS_NO_BUFFER
&&
678 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
679 if (phase
!= NtLmNegotiate
) {
680 cifs_dbg(VFS
, "Unexpected more processing error\n");
683 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
684 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
685 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
686 le16_to_cpu(rsp
->SecurityBufferOffset
));
691 /* NTLMSSP Negotiate sent now processing challenge (response) */
692 phase
= NtLmChallenge
; /* process ntlmssp challenge */
693 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
694 ses
->Suid
= rsp
->hdr
.SessionId
;
695 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
696 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
700 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
701 * but at least the raw NTLMSSP case works.
704 * No tcon so can't do
705 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
710 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
711 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
712 cifs_dbg(VFS
, "SMB3 encryption not supported yet\n");
714 free_rsp_buf(resp_buftype
, rsp
);
716 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
717 if ((phase
== NtLmChallenge
) && (rc
== 0))
718 goto ssetup_ntlmssp_authenticate
;
721 mutex_lock(&server
->srv_mutex
);
722 if (server
->sign
&& server
->ops
->generate_signingkey
) {
723 rc
= server
->ops
->generate_signingkey(ses
);
724 kfree(ses
->auth_key
.response
);
725 ses
->auth_key
.response
= NULL
;
728 "SMB3 session key generation failed\n");
729 mutex_unlock(&server
->srv_mutex
);
733 if (!server
->session_estab
) {
734 server
->sequence_number
= 0x2;
735 server
->session_estab
= true;
737 mutex_unlock(&server
->srv_mutex
);
739 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
740 spin_lock(&GlobalMid_Lock
);
741 ses
->status
= CifsGood
;
742 ses
->need_reconnect
= false;
743 spin_unlock(&GlobalMid_Lock
);
748 kfree(ses
->auth_key
.response
);
749 ses
->auth_key
.response
= NULL
;
757 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
759 struct smb2_logoff_req
*req
; /* response is also trivial struct */
761 struct TCP_Server_Info
*server
;
763 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
765 if (ses
&& (ses
->server
))
766 server
= ses
->server
;
770 /* no need to send SMB logoff if uid already closed due to reconnect */
771 if (ses
->need_reconnect
)
772 goto smb2_session_already_dead
;
774 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
778 /* since no tcon, smb2_init can not do this, so do here */
779 req
->hdr
.SessionId
= ses
->Suid
;
781 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
783 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
785 * No tcon so can't do
786 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
789 smb2_session_already_dead
:
793 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
795 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
798 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
800 /* These are similar values to what Windows uses */
801 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
803 tcon
->max_chunks
= 256;
804 tcon
->max_bytes_chunk
= 1048576;
805 tcon
->max_bytes_copy
= 16777216;
809 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
810 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
812 struct smb2_tree_connect_req
*req
;
813 struct smb2_tree_connect_rsp
*rsp
= NULL
;
818 struct TCP_Server_Info
*server
;
819 __le16
*unc_path
= NULL
;
821 cifs_dbg(FYI
, "TCON\n");
823 if ((ses
->server
) && tree
)
824 server
= ses
->server
;
828 if (tcon
&& tcon
->bad_network_name
)
831 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
832 if (unc_path
== NULL
)
835 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
837 if (unc_path_len
< 2) {
842 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
849 /* since no tcon, smb2_init can not do this, so do here */
850 req
->hdr
.SessionId
= ses
->Suid
;
851 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
852 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
855 iov
[0].iov_base
= (char *)req
;
856 /* 4 for rfc1002 length field and 1 for pad */
857 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
859 /* Testing shows that buffer offset must be at location of Buffer[0] */
860 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
861 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
862 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
863 iov
[1].iov_base
= unc_path
;
864 iov
[1].iov_len
= unc_path_len
;
866 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
868 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
869 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
873 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
874 tcon
->need_reconnect
= true;
876 goto tcon_error_exit
;
880 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
884 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
885 cifs_dbg(FYI
, "connection to disk share\n");
886 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
888 cifs_dbg(FYI
, "connection to pipe share\n");
889 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
891 cifs_dbg(FYI
, "connection to printer\n");
893 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
895 goto tcon_error_exit
;
898 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
899 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
900 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
901 tcon
->tidStatus
= CifsGood
;
902 tcon
->need_reconnect
= false;
903 tcon
->tid
= rsp
->hdr
.TreeId
;
904 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
906 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
907 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
908 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
909 init_copy_chunk_defaults(tcon
);
910 if (tcon
->ses
->server
->ops
->validate_negotiate
)
911 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
913 free_rsp_buf(resp_buftype
, rsp
);
918 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
919 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
920 tcon
->bad_network_name
= true;
926 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
928 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
930 struct TCP_Server_Info
*server
;
931 struct cifs_ses
*ses
= tcon
->ses
;
933 cifs_dbg(FYI
, "Tree Disconnect\n");
935 if (ses
&& (ses
->server
))
936 server
= ses
->server
;
940 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
943 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
947 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
949 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
955 static struct create_durable
*
956 create_durable_buf(void)
958 struct create_durable
*buf
;
960 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
964 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
965 (struct create_durable
, Data
));
966 buf
->ccontext
.DataLength
= cpu_to_le32(16);
967 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
968 (struct create_durable
, Name
));
969 buf
->ccontext
.NameLength
= cpu_to_le16(4);
977 static struct create_durable
*
978 create_reconnect_durable_buf(struct cifs_fid
*fid
)
980 struct create_durable
*buf
;
982 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
986 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
987 (struct create_durable
, Data
));
988 buf
->ccontext
.DataLength
= cpu_to_le32(16);
989 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
990 (struct create_durable
, Name
));
991 buf
->ccontext
.NameLength
= cpu_to_le16(4);
992 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
993 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1002 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1003 unsigned int *epoch
)
1006 struct create_context
*cc
;
1007 unsigned int next
= 0;
1010 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
1011 cc
= (struct create_context
*)data_offset
;
1013 cc
= (struct create_context
*)((char *)cc
+ next
);
1014 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1015 if (le16_to_cpu(cc
->NameLength
) != 4 ||
1016 strncmp(name
, "RqLs", 4)) {
1017 next
= le32_to_cpu(cc
->Next
);
1020 return server
->ops
->parse_lease_buf(cc
, epoch
);
1021 } while (next
!= 0);
1027 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1028 unsigned int *num_iovec
, __u8
*oplock
)
1030 struct smb2_create_req
*req
= iov
[0].iov_base
;
1031 unsigned int num
= *num_iovec
;
1033 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1034 if (iov
[num
].iov_base
== NULL
)
1036 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1037 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1038 if (!req
->CreateContextsOffset
)
1039 req
->CreateContextsOffset
= cpu_to_le32(
1040 sizeof(struct smb2_create_req
) - 4 +
1041 iov
[num
- 1].iov_len
);
1042 le32_add_cpu(&req
->CreateContextsLength
,
1043 server
->vals
->create_lease_size
);
1044 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
1045 *num_iovec
= num
+ 1;
1050 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1051 struct cifs_open_parms
*oparms
)
1053 struct smb2_create_req
*req
= iov
[0].iov_base
;
1054 unsigned int num
= *num_iovec
;
1056 if (oparms
->reconnect
) {
1057 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1058 /* indicate that we don't need to relock the file */
1059 oparms
->reconnect
= false;
1061 iov
[num
].iov_base
= create_durable_buf();
1062 if (iov
[num
].iov_base
== NULL
)
1064 iov
[num
].iov_len
= sizeof(struct create_durable
);
1065 if (!req
->CreateContextsOffset
)
1066 req
->CreateContextsOffset
=
1067 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1069 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1070 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
1071 *num_iovec
= num
+ 1;
1076 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1077 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1078 struct smb2_err_rsp
**err_buf
)
1080 struct smb2_create_req
*req
;
1081 struct smb2_create_rsp
*rsp
;
1082 struct TCP_Server_Info
*server
;
1083 struct cifs_tcon
*tcon
= oparms
->tcon
;
1084 struct cifs_ses
*ses
= tcon
->ses
;
1088 __le16
*copy_path
= NULL
;
1091 unsigned int num_iovecs
= 2;
1092 __u32 file_attributes
= 0;
1094 cifs_dbg(FYI
, "create/open\n");
1096 if (ses
&& (ses
->server
))
1097 server
= ses
->server
;
1101 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1105 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1106 file_attributes
|= ATTR_READONLY
;
1108 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1109 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1110 /* File attributes ignored on open (used in create though) */
1111 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1112 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1113 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1114 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1115 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1116 /* do not count rfc1001 len field */
1117 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
1119 iov
[0].iov_base
= (char *)req
;
1120 /* 4 for rfc1002 length field */
1121 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1123 /* MUST set path len (NameLength) to 0 opening root of share */
1124 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1125 /* -1 since last byte is buf[0] which is sent below (path) */
1127 if (uni_path_len
% 8 != 0) {
1128 copy_size
= uni_path_len
/ 8 * 8;
1129 if (copy_size
< uni_path_len
)
1132 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1135 memcpy((char *)copy_path
, (const char *)path
,
1137 uni_path_len
= copy_size
;
1141 iov
[1].iov_len
= uni_path_len
;
1142 iov
[1].iov_base
= path
;
1143 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1144 inc_rfc1001_len(req
, uni_path_len
- 1);
1146 if (!server
->oplocks
)
1147 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1149 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1150 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1151 req
->RequestedOplockLevel
= *oplock
;
1153 rc
= add_lease_context(server
, iov
, &num_iovecs
, oplock
);
1155 cifs_small_buf_release(req
);
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
);
1173 kfree(iov
[num_iovecs
-1].iov_base
);
1178 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1179 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
1182 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1184 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1189 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1190 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1193 memcpy(buf
, &rsp
->CreationTime
, 32);
1194 buf
->AllocationSize
= rsp
->AllocationSize
;
1195 buf
->EndOfFile
= rsp
->EndofFile
;
1196 buf
->Attributes
= rsp
->FileAttributes
;
1197 buf
->NumberOfLinks
= cpu_to_le32(1);
1198 buf
->DeletePending
= 0;
1201 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1202 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1204 *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");
1231 /* zero out returned data len, in case of error */
1235 if (ses
&& (ses
->server
))
1236 server
= ses
->server
;
1240 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1244 req
->CtlCode
= cpu_to_le32(opcode
);
1245 req
->PersistentFileId
= persistent_fid
;
1246 req
->VolatileFileId
= volatile_fid
;
1249 req
->InputCount
= cpu_to_le32(indatalen
);
1250 /* do not set InputOffset if no input data */
1252 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1253 iov
[1].iov_base
= in_data
;
1254 iov
[1].iov_len
= indatalen
;
1259 req
->OutputOffset
= 0;
1260 req
->OutputCount
= 0; /* MBZ */
1263 * Could increase MaxOutputResponse, but that would require more
1264 * than one credit. Windows typically sets this smaller, but for some
1265 * ioctls it may be useful to allow server to send more. No point
1266 * limiting what the server can send as long as fits in one credit
1268 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1271 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1275 iov
[0].iov_base
= (char *)req
;
1278 * If no input data, the size of ioctl struct in
1279 * protocol spec still includes a 1 byte data buffer,
1280 * but if input data passed to ioctl, we do not
1281 * want to double count this, so we do not send
1282 * the dummy one byte of data in iovec[0] if sending
1283 * input data (in iovec[1]). We also must add 4 bytes
1284 * in first iovec to allow for rfc1002 length field.
1288 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1289 inc_rfc1001_len(req
, indatalen
- 1);
1291 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1294 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1295 rsp
= (struct smb2_ioctl_rsp
*)iov
[0].iov_base
;
1297 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
1299 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1301 } else if (rc
== -EINVAL
) {
1302 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
1303 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
1305 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1310 /* check if caller wants to look at return data or just return rc */
1311 if ((plen
== NULL
) || (out_data
== NULL
))
1314 *plen
= le32_to_cpu(rsp
->OutputCount
);
1316 /* We check for obvious errors in the output buffer length and offset */
1318 goto ioctl_exit
; /* server returned no data */
1319 else if (*plen
> 0xFF00) {
1320 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1326 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1327 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1328 le32_to_cpu(rsp
->OutputOffset
));
1334 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1335 if (*out_data
== NULL
) {
1340 memcpy(*out_data
, rsp
->hdr
.ProtocolId
+ le32_to_cpu(rsp
->OutputOffset
),
1343 free_rsp_buf(resp_buftype
, rsp
);
1348 * Individual callers to ioctl worker function follow
1352 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
1353 u64 persistent_fid
, u64 volatile_fid
)
1356 struct compress_ioctl fsctl_input
;
1357 char *ret_data
= NULL
;
1359 fsctl_input
.CompressionState
=
1360 __constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
1362 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
1363 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
1364 (char *)&fsctl_input
/* data input */,
1365 2 /* in data len */, &ret_data
/* out data */, NULL
);
1367 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
1373 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1374 u64 persistent_fid
, u64 volatile_fid
)
1376 struct smb2_close_req
*req
;
1377 struct smb2_close_rsp
*rsp
;
1378 struct TCP_Server_Info
*server
;
1379 struct cifs_ses
*ses
= tcon
->ses
;
1384 cifs_dbg(FYI
, "Close\n");
1386 if (ses
&& (ses
->server
))
1387 server
= ses
->server
;
1391 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1395 req
->PersistentFileId
= persistent_fid
;
1396 req
->VolatileFileId
= volatile_fid
;
1398 iov
[0].iov_base
= (char *)req
;
1399 /* 4 for rfc1002 length field */
1400 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1402 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1403 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1407 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1411 /* BB FIXME - decode close response, update inode for caching */
1414 free_rsp_buf(resp_buftype
, rsp
);
1419 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1420 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1423 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1424 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1425 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1426 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1429 if (buffer_length
< min_buf_size
) {
1430 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1431 buffer_length
, min_buf_size
);
1435 /* check if beyond RFC1001 maximum length */
1436 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1437 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1438 buffer_length
, smb_len
);
1442 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1443 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1451 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1452 * Caller must free buffer.
1455 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1456 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1460 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1466 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1470 memcpy(data
, begin_of_buf
, buffer_length
);
1476 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1477 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1478 size_t output_len
, size_t min_len
, void *data
)
1480 struct smb2_query_info_req
*req
;
1481 struct smb2_query_info_rsp
*rsp
= NULL
;
1485 struct TCP_Server_Info
*server
;
1486 struct cifs_ses
*ses
= tcon
->ses
;
1488 cifs_dbg(FYI
, "Query Info\n");
1490 if (ses
&& (ses
->server
))
1491 server
= ses
->server
;
1495 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1499 req
->InfoType
= SMB2_O_INFO_FILE
;
1500 req
->FileInfoClass
= info_class
;
1501 req
->PersistentFileId
= persistent_fid
;
1502 req
->VolatileFileId
= volatile_fid
;
1503 /* 4 for rfc1002 length field and 1 for Buffer */
1504 req
->InputBufferOffset
=
1505 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1506 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1508 iov
[0].iov_base
= (char *)req
;
1509 /* 4 for rfc1002 length field */
1510 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1512 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1513 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1516 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1520 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1521 le32_to_cpu(rsp
->OutputBufferLength
),
1522 &rsp
->hdr
, min_len
, data
);
1525 free_rsp_buf(resp_buftype
, rsp
);
1530 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1531 u64 persistent_fid
, u64 volatile_fid
,
1532 struct smb2_file_all_info
*data
)
1534 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1535 FILE_ALL_INFORMATION
,
1536 sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
1537 sizeof(struct smb2_file_all_info
), data
);
1541 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1542 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1544 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1545 FILE_INTERNAL_INFORMATION
,
1546 sizeof(struct smb2_file_internal_info
),
1547 sizeof(struct smb2_file_internal_info
), uniqueid
);
1551 * This is a no-op for now. We're not really interested in the reply, but
1552 * rather in the fact that the server sent one and that server->lstrp
1555 * FIXME: maybe we should consider checking that the reply matches request?
1558 smb2_echo_callback(struct mid_q_entry
*mid
)
1560 struct TCP_Server_Info
*server
= mid
->callback_data
;
1561 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1562 unsigned int credits_received
= 1;
1564 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1565 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1567 DeleteMidQEntry(mid
);
1568 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1572 SMB2_echo(struct TCP_Server_Info
*server
)
1574 struct smb2_echo_req
*req
;
1577 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1580 cifs_dbg(FYI
, "In echo request\n");
1582 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1586 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1588 iov
.iov_base
= (char *)req
;
1589 /* 4 for rfc1002 length field */
1590 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1592 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1595 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
1597 cifs_small_buf_release(req
);
1602 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1605 struct smb2_flush_req
*req
;
1606 struct TCP_Server_Info
*server
;
1607 struct cifs_ses
*ses
= tcon
->ses
;
1612 cifs_dbg(FYI
, "Flush\n");
1614 if (ses
&& (ses
->server
))
1615 server
= ses
->server
;
1619 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1623 req
->PersistentFileId
= persistent_fid
;
1624 req
->VolatileFileId
= volatile_fid
;
1626 iov
[0].iov_base
= (char *)req
;
1627 /* 4 for rfc1002 length field */
1628 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1630 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1632 if ((rc
!= 0) && tcon
)
1633 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1635 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1640 * To form a chain of read requests, any read requests after the first should
1641 * have the end_of_chain boolean set to true.
1644 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1645 unsigned int remaining_bytes
, int request_type
)
1648 struct smb2_read_req
*req
= NULL
;
1650 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1653 if (io_parms
->tcon
->ses
->server
== NULL
)
1654 return -ECONNABORTED
;
1656 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1658 req
->PersistentFileId
= io_parms
->persistent_fid
;
1659 req
->VolatileFileId
= io_parms
->volatile_fid
;
1660 req
->ReadChannelInfoOffset
= 0; /* reserved */
1661 req
->ReadChannelInfoLength
= 0; /* reserved */
1662 req
->Channel
= 0; /* reserved */
1663 req
->MinimumCount
= 0;
1664 req
->Length
= cpu_to_le32(io_parms
->length
);
1665 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1667 if (request_type
& CHAINED_REQUEST
) {
1668 if (!(request_type
& END_OF_CHAIN
)) {
1669 /* 4 for rfc1002 length field */
1670 req
->hdr
.NextCommand
=
1671 cpu_to_le32(get_rfc1002_length(req
) + 4);
1672 } else /* END_OF_CHAIN */
1673 req
->hdr
.NextCommand
= 0;
1674 if (request_type
& RELATED_REQUEST
) {
1675 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1677 * Related requests use info from previous read request
1680 req
->hdr
.SessionId
= 0xFFFFFFFF;
1681 req
->hdr
.TreeId
= 0xFFFFFFFF;
1682 req
->PersistentFileId
= 0xFFFFFFFF;
1683 req
->VolatileFileId
= 0xFFFFFFFF;
1686 if (remaining_bytes
> io_parms
->length
)
1687 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1689 req
->RemainingBytes
= 0;
1691 iov
[0].iov_base
= (char *)req
;
1692 /* 4 for rfc1002 length field */
1693 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1698 smb2_readv_callback(struct mid_q_entry
*mid
)
1700 struct cifs_readdata
*rdata
= mid
->callback_data
;
1701 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1702 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1703 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1704 unsigned int credits_received
= 1;
1705 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1707 .rq_pages
= rdata
->pages
,
1708 .rq_npages
= rdata
->nr_pages
,
1709 .rq_pagesz
= rdata
->pagesz
,
1710 .rq_tailsz
= rdata
->tailsz
};
1712 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1713 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
1716 switch (mid
->mid_state
) {
1717 case MID_RESPONSE_RECEIVED
:
1718 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1719 /* result already set, check signature */
1723 rc
= smb2_verify_signature(&rqst
, server
);
1725 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
1728 /* FIXME: should this be counted toward the initiating task? */
1729 task_io_account_read(rdata
->bytes
);
1730 cifs_stats_bytes_read(tcon
, rdata
->bytes
);
1732 case MID_REQUEST_SUBMITTED
:
1733 case MID_RETRY_NEEDED
:
1734 rdata
->result
= -EAGAIN
;
1737 if (rdata
->result
!= -ENODATA
)
1738 rdata
->result
= -EIO
;
1742 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1744 queue_work(cifsiod_wq
, &rdata
->work
);
1745 DeleteMidQEntry(mid
);
1746 add_credits(server
, credits_received
, 0);
1749 /* smb2_async_readv - send an async write, and set up mid to handle result */
1751 smb2_async_readv(struct cifs_readdata
*rdata
)
1754 struct smb2_hdr
*buf
;
1755 struct cifs_io_parms io_parms
;
1756 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1759 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
1760 __func__
, rdata
->offset
, rdata
->bytes
);
1762 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1763 io_parms
.offset
= rdata
->offset
;
1764 io_parms
.length
= rdata
->bytes
;
1765 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
1766 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
1767 io_parms
.pid
= rdata
->pid
;
1768 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
1772 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1773 /* 4 for rfc1002 length field */
1774 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
1776 kref_get(&rdata
->refcount
);
1777 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
1778 cifs_readv_receive
, smb2_readv_callback
,
1781 kref_put(&rdata
->refcount
, cifs_readdata_release
);
1782 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
1785 cifs_small_buf_release(buf
);
1790 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1791 unsigned int *nbytes
, char **buf
, int *buf_type
)
1793 int resp_buftype
, rc
= -EACCES
;
1794 struct smb2_read_rsp
*rsp
= NULL
;
1798 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
1802 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
1803 &resp_buftype
, CIFS_LOG_ERROR
);
1805 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
1807 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
1808 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1813 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
1814 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
1816 *nbytes
= le32_to_cpu(rsp
->DataLength
);
1817 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
1818 (*nbytes
> io_parms
->length
)) {
1819 cifs_dbg(FYI
, "bad length %d for count %d\n",
1820 *nbytes
, io_parms
->length
);
1827 memcpy(*buf
, (char *)rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
1829 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1830 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
1831 *buf
= iov
[0].iov_base
;
1832 if (resp_buftype
== CIFS_SMALL_BUFFER
)
1833 *buf_type
= CIFS_SMALL_BUFFER
;
1834 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
1835 *buf_type
= CIFS_LARGE_BUFFER
;
1841 * Check the mid_state and signature on received buffer (if any), and queue the
1842 * workqueue completion task.
1845 smb2_writev_callback(struct mid_q_entry
*mid
)
1847 struct cifs_writedata
*wdata
= mid
->callback_data
;
1848 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1849 unsigned int written
;
1850 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
1851 unsigned int credits_received
= 1;
1853 switch (mid
->mid_state
) {
1854 case MID_RESPONSE_RECEIVED
:
1855 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
1856 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
1857 if (wdata
->result
!= 0)
1860 written
= le32_to_cpu(rsp
->DataLength
);
1862 * Mask off high 16 bits when bytes written as returned
1863 * by the server is greater than bytes requested by the
1864 * client. OS/2 servers are known to set incorrect
1867 if (written
> wdata
->bytes
)
1870 if (written
< wdata
->bytes
)
1871 wdata
->result
= -ENOSPC
;
1873 wdata
->bytes
= written
;
1875 case MID_REQUEST_SUBMITTED
:
1876 case MID_RETRY_NEEDED
:
1877 wdata
->result
= -EAGAIN
;
1880 wdata
->result
= -EIO
;
1885 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1887 queue_work(cifsiod_wq
, &wdata
->work
);
1888 DeleteMidQEntry(mid
);
1889 add_credits(tcon
->ses
->server
, credits_received
, 0);
1892 /* smb2_async_writev - send an async write, and set up mid to handle result */
1894 smb2_async_writev(struct cifs_writedata
*wdata
,
1895 void (*release
)(struct kref
*kref
))
1898 struct smb2_write_req
*req
= NULL
;
1899 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
1901 struct smb_rqst rqst
;
1903 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
1905 goto async_writev_out
;
1907 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
1909 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
1910 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
1911 req
->WriteChannelInfoOffset
= 0;
1912 req
->WriteChannelInfoLength
= 0;
1914 req
->Offset
= cpu_to_le64(wdata
->offset
);
1915 /* 4 for rfc1002 length field */
1916 req
->DataOffset
= cpu_to_le16(
1917 offsetof(struct smb2_write_req
, Buffer
) - 4);
1918 req
->RemainingBytes
= 0;
1920 /* 4 for rfc1002 length field and 1 for Buffer */
1921 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
1926 rqst
.rq_pages
= wdata
->pages
;
1927 rqst
.rq_npages
= wdata
->nr_pages
;
1928 rqst
.rq_pagesz
= wdata
->pagesz
;
1929 rqst
.rq_tailsz
= wdata
->tailsz
;
1931 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
1932 wdata
->offset
, wdata
->bytes
);
1934 req
->Length
= cpu_to_le32(wdata
->bytes
);
1936 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
1938 kref_get(&wdata
->refcount
);
1939 rc
= cifs_call_async(tcon
->ses
->server
, &rqst
, NULL
,
1940 smb2_writev_callback
, wdata
, 0);
1943 kref_put(&wdata
->refcount
, release
);
1944 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
1948 cifs_small_buf_release(req
);
1953 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1954 * The length field from io_parms must be at least 1 and indicates a number of
1955 * elements with data to write that begins with position 1 in iov array. All
1956 * data length is specified by count.
1959 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
1960 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
1963 struct smb2_write_req
*req
= NULL
;
1964 struct smb2_write_rsp
*rsp
= NULL
;
1971 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
1975 if (io_parms
->tcon
->ses
->server
== NULL
)
1976 return -ECONNABORTED
;
1978 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1980 req
->PersistentFileId
= io_parms
->persistent_fid
;
1981 req
->VolatileFileId
= io_parms
->volatile_fid
;
1982 req
->WriteChannelInfoOffset
= 0;
1983 req
->WriteChannelInfoLength
= 0;
1985 req
->Length
= cpu_to_le32(io_parms
->length
);
1986 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1987 /* 4 for rfc1002 length field */
1988 req
->DataOffset
= cpu_to_le16(
1989 offsetof(struct smb2_write_req
, Buffer
) - 4);
1990 req
->RemainingBytes
= 0;
1992 iov
[0].iov_base
= (char *)req
;
1993 /* 4 for rfc1002 length field and 1 for Buffer */
1994 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1996 /* length of entire message including data to be written */
1997 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
1999 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
2001 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
2004 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
2005 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
2007 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2009 free_rsp_buf(resp_buftype
, rsp
);
2014 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
2017 unsigned int entrycount
= 0;
2018 unsigned int next_offset
= 0;
2019 FILE_DIRECTORY_INFO
*entryptr
;
2021 if (bufstart
== NULL
)
2024 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
2027 entryptr
= (FILE_DIRECTORY_INFO
*)
2028 ((char *)entryptr
+ next_offset
);
2030 if ((char *)entryptr
+ size
> end_of_buf
) {
2031 cifs_dbg(VFS
, "malformed search entry would overflow\n");
2035 len
= le32_to_cpu(entryptr
->FileNameLength
);
2036 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
2037 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
2042 *lastentry
= (char *)entryptr
;
2045 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
2057 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
2058 u64 persistent_fid
, u64 volatile_fid
, int index
,
2059 struct cifs_search_info
*srch_inf
)
2061 struct smb2_query_directory_req
*req
;
2062 struct smb2_query_directory_rsp
*rsp
= NULL
;
2067 unsigned char *bufptr
;
2068 struct TCP_Server_Info
*server
;
2069 struct cifs_ses
*ses
= tcon
->ses
;
2070 __le16 asteriks
= cpu_to_le16('*');
2072 unsigned int output_size
= CIFSMaxBufSize
;
2073 size_t info_buf_size
;
2075 if (ses
&& (ses
->server
))
2076 server
= ses
->server
;
2080 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
2084 switch (srch_inf
->info_level
) {
2085 case SMB_FIND_FILE_DIRECTORY_INFO
:
2086 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
2087 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
2089 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
2090 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
2091 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
2094 cifs_dbg(VFS
, "info level %u isn't supported\n",
2095 srch_inf
->info_level
);
2100 req
->FileIndex
= cpu_to_le32(index
);
2101 req
->PersistentFileId
= persistent_fid
;
2102 req
->VolatileFileId
= volatile_fid
;
2105 bufptr
= req
->Buffer
;
2106 memcpy(bufptr
, &asteriks
, len
);
2108 req
->FileNameOffset
=
2109 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
2110 req
->FileNameLength
= cpu_to_le16(len
);
2112 * BB could be 30 bytes or so longer if we used SMB2 specific
2113 * buffer lengths, but this is safe and close enough.
2115 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
2116 output_size
= min_t(unsigned int, output_size
, 2 << 15);
2117 req
->OutputBufferLength
= cpu_to_le32(output_size
);
2119 iov
[0].iov_base
= (char *)req
;
2120 /* 4 for RFC1001 length and 1 for Buffer */
2121 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2123 iov
[1].iov_base
= (char *)(req
->Buffer
);
2124 iov
[1].iov_len
= len
;
2126 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
2128 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
2129 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
2132 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
2136 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2137 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2142 srch_inf
->unicode
= true;
2144 if (srch_inf
->ntwrk_buf_start
) {
2145 if (srch_inf
->smallBuf
)
2146 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
2148 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
2150 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
2151 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
2152 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
2153 /* 4 for rfc1002 length field */
2154 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
2155 srch_inf
->entries_in_buffer
=
2156 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
2157 &srch_inf
->last_entry
, info_buf_size
);
2158 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
2159 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
2160 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
2161 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
2162 if (resp_buftype
== CIFS_LARGE_BUFFER
)
2163 srch_inf
->smallBuf
= false;
2164 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
2165 srch_inf
->smallBuf
= true;
2167 cifs_dbg(VFS
, "illegal search buffer type\n");
2169 if (rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
)
2170 srch_inf
->endOfSearch
= 1;
2172 srch_inf
->endOfSearch
= 0;
2177 free_rsp_buf(resp_buftype
, rsp
);
2182 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2183 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
2184 unsigned int num
, void **data
, unsigned int *size
)
2186 struct smb2_set_info_req
*req
;
2187 struct smb2_set_info_rsp
*rsp
= NULL
;
2192 struct TCP_Server_Info
*server
;
2193 struct cifs_ses
*ses
= tcon
->ses
;
2195 if (ses
&& (ses
->server
))
2196 server
= ses
->server
;
2203 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
2207 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
2213 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2215 req
->InfoType
= SMB2_O_INFO_FILE
;
2216 req
->FileInfoClass
= info_class
;
2217 req
->PersistentFileId
= persistent_fid
;
2218 req
->VolatileFileId
= volatile_fid
;
2220 /* 4 for RFC1001 length and 1 for Buffer */
2222 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
2223 req
->BufferLength
= cpu_to_le32(*size
);
2225 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
2227 memcpy(req
->Buffer
, *data
, *size
);
2229 iov
[0].iov_base
= (char *)req
;
2230 /* 4 for RFC1001 length */
2231 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2233 for (i
= 1; i
< num
; i
++) {
2234 inc_rfc1001_len(req
, size
[i
]);
2235 le32_add_cpu(&req
->BufferLength
, size
[i
]);
2236 iov
[i
].iov_base
= (char *)data
[i
];
2237 iov
[i
].iov_len
= size
[i
];
2240 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
2241 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
2244 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
2246 free_rsp_buf(resp_buftype
, rsp
);
2252 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
2253 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2255 struct smb2_file_rename_info info
;
2257 unsigned int size
[2];
2259 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2261 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2265 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
2266 /* 0 = fail if target already exists */
2267 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2268 info
.FileNameLength
= cpu_to_le32(len
);
2271 size
[0] = sizeof(struct smb2_file_rename_info
);
2273 data
[1] = target_file
;
2274 size
[1] = len
+ 2 /* null */;
2276 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2277 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2284 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2285 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2287 struct smb2_file_link_info info
;
2289 unsigned int size
[2];
2291 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2293 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2297 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2298 /* 0 = fail if link already exists */
2299 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2300 info
.FileNameLength
= cpu_to_le32(len
);
2303 size
[0] = sizeof(struct smb2_file_link_info
);
2305 data
[1] = target_file
;
2306 size
[1] = len
+ 2 /* null */;
2308 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2309 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2315 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2316 u64 volatile_fid
, u32 pid
, __le64
*eof
)
2318 struct smb2_file_eof_info info
;
2322 info
.EndOfFile
= *eof
;
2325 size
= sizeof(struct smb2_file_eof_info
);
2327 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
, pid
,
2328 FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2332 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2333 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2336 size
= sizeof(FILE_BASIC_INFO
);
2337 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2338 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2339 (void **)&buf
, &size
);
2343 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2344 const u64 persistent_fid
, const u64 volatile_fid
,
2348 struct smb2_oplock_break
*req
= NULL
;
2350 cifs_dbg(FYI
, "SMB2_oplock_break\n");
2351 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2356 req
->VolatileFid
= volatile_fid
;
2357 req
->PersistentFid
= persistent_fid
;
2358 req
->OplockLevel
= oplock_level
;
2359 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2361 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2362 /* SMB2 buffer freed by function above */
2365 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2366 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
2373 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2374 struct kstatfs
*kst
)
2376 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2377 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2378 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2379 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2380 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2385 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2386 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2389 struct smb2_query_info_req
*req
;
2391 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2393 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2396 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2400 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2401 req
->FileInfoClass
= level
;
2402 req
->PersistentFileId
= persistent_fid
;
2403 req
->VolatileFileId
= volatile_fid
;
2404 /* 4 for rfc1002 length field and 1 for pad */
2405 req
->InputBufferOffset
=
2406 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2407 req
->OutputBufferLength
= cpu_to_le32(
2408 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2410 iov
->iov_base
= (char *)req
;
2411 /* 4 for rfc1002 length field */
2412 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2417 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2418 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2420 struct smb2_query_info_rsp
*rsp
= NULL
;
2424 struct cifs_ses
*ses
= tcon
->ses
;
2425 struct smb2_fs_full_size_info
*info
= NULL
;
2427 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2428 sizeof(struct smb2_fs_full_size_info
),
2429 persistent_fid
, volatile_fid
);
2433 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2435 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2438 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2440 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2441 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2442 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2443 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2444 sizeof(struct smb2_fs_full_size_info
));
2446 copy_fs_info_to_kstatfs(info
, fsdata
);
2449 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2454 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
2455 u64 persistent_fid
, u64 volatile_fid
, int level
)
2457 struct smb2_query_info_rsp
*rsp
= NULL
;
2460 int resp_buftype
, max_len
, min_len
;
2461 struct cifs_ses
*ses
= tcon
->ses
;
2462 unsigned int rsp_len
, offset
;
2464 if (level
== FS_DEVICE_INFORMATION
) {
2465 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
2466 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
2467 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
2468 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
2469 min_len
= MIN_FS_ATTR_INFO_SIZE
;
2470 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
2471 max_len
= sizeof(struct smb3_fs_ss_info
);
2472 min_len
= sizeof(struct smb3_fs_ss_info
);
2474 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
2478 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
2479 persistent_fid
, volatile_fid
);
2483 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2485 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2488 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2490 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
2491 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
2492 rc
= validate_buf(offset
, rsp_len
, &rsp
->hdr
, min_len
);
2496 if (level
== FS_ATTRIBUTE_INFORMATION
)
2497 memcpy(&tcon
->fsAttrInfo
, 4 /* RFC1001 len */ + offset
2498 + (char *)&rsp
->hdr
, min_t(unsigned int,
2500 else if (level
== FS_DEVICE_INFORMATION
)
2501 memcpy(&tcon
->fsDevInfo
, 4 /* RFC1001 len */ + offset
2502 + (char *)&rsp
->hdr
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
2503 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
2504 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
2505 (4 /* RFC1001 len */ + offset
+ (char *)&rsp
->hdr
);
2506 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
2507 tcon
->perf_sector_size
=
2508 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
2512 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2517 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2518 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2519 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2522 struct smb2_lock_req
*req
= NULL
;
2527 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2529 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2533 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2534 req
->LockCount
= cpu_to_le16(num_lock
);
2536 req
->PersistentFileId
= persist_fid
;
2537 req
->VolatileFileId
= volatile_fid
;
2539 count
= num_lock
* sizeof(struct smb2_lock_element
);
2540 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2542 iov
[0].iov_base
= (char *)req
;
2543 /* 4 for rfc1002 length field and count for all locks */
2544 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2545 iov
[1].iov_base
= (char *)buf
;
2546 iov
[1].iov_len
= count
;
2548 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2549 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2551 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2552 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2559 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2560 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2561 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2564 struct smb2_lock_element lock
;
2566 lock
.Offset
= cpu_to_le64(offset
);
2567 lock
.Length
= cpu_to_le64(length
);
2568 lock
.Flags
= cpu_to_le32(lock_flags
);
2569 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2570 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2572 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2576 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2577 __u8
*lease_key
, const __le32 lease_state
)
2580 struct smb2_lease_ack
*req
= NULL
;
2582 cifs_dbg(FYI
, "SMB2_lease_break\n");
2583 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2588 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2589 req
->StructureSize
= cpu_to_le16(36);
2590 inc_rfc1001_len(req
, 12);
2592 memcpy(req
->LeaseKey
, lease_key
, 16);
2593 req
->LeaseState
= lease_state
;
2595 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2596 /* SMB2 buffer freed by function above */
2599 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2600 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);