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/uuid.h>
37 #include <linux/pagemap.h>
38 #include <linux/xattr.h>
42 #include "cifsproto.h"
43 #include "smb2proto.h"
44 #include "cifs_unicode.h"
45 #include "cifs_debug.h"
47 #include "smb2status.h"
50 #include "cifs_spnego.h"
53 * The following table defines the expected "StructureSize" of SMB2 requests
54 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
56 * Note that commands are defined in smb2pdu.h in le16 but the array below is
57 * indexed by command in host byte order.
59 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
60 /* SMB2_NEGOTIATE */ 36,
61 /* SMB2_SESSION_SETUP */ 25,
63 /* SMB2_TREE_CONNECT */ 9,
64 /* SMB2_TREE_DISCONNECT */ 4,
74 /* SMB2_QUERY_DIRECTORY */ 33,
75 /* SMB2_CHANGE_NOTIFY */ 32,
76 /* SMB2_QUERY_INFO */ 41,
77 /* SMB2_SET_INFO */ 33,
78 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
81 static int encryption_required(const struct cifs_tcon
*tcon
)
85 if ((tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
) ||
86 (tcon
->share_flags
& SHI1005_FLAGS_ENCRYPT_DATA
))
89 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
95 smb2_hdr_assemble(struct smb2_sync_hdr
*shdr
, __le16 smb2_cmd
,
96 const struct cifs_tcon
*tcon
)
98 shdr
->ProtocolId
= SMB2_PROTO_NUMBER
;
99 shdr
->StructureSize
= cpu_to_le16(64);
100 shdr
->Command
= smb2_cmd
;
101 if (tcon
&& tcon
->ses
&& tcon
->ses
->server
) {
102 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
104 spin_lock(&server
->req_lock
);
105 /* Request up to 2 credits but don't go over the limit. */
106 if (server
->credits
>= server
->max_credits
)
107 shdr
->CreditRequest
= cpu_to_le16(0);
109 shdr
->CreditRequest
= cpu_to_le16(
110 min_t(int, server
->max_credits
-
111 server
->credits
, 2));
112 spin_unlock(&server
->req_lock
);
114 shdr
->CreditRequest
= cpu_to_le16(2);
116 shdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
121 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
122 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
123 if ((tcon
->ses
) && (tcon
->ses
->server
) &&
124 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
125 shdr
->CreditCharge
= cpu_to_le16(1);
126 /* else CreditCharge MBZ */
128 shdr
->TreeId
= tcon
->tid
;
129 /* Uid is not converted */
131 shdr
->SessionId
= tcon
->ses
->Suid
;
134 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
135 * to pass the path on the Open SMB prefixed by \\server\share.
136 * Not sure when we would need to do the augmented path (if ever) and
137 * setting this flag breaks the SMB2 open operation since it is
138 * illegal to send an empty path name (without \\server\share prefix)
139 * when the DFS flag is set in the SMB open header. We could
140 * consider setting the flag on all operations other than open
141 * but it is safer to net set it for now.
143 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
144 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
146 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
&&
147 !encryption_required(tcon
))
148 shdr
->Flags
|= SMB2_FLAGS_SIGNED
;
154 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
157 struct nls_table
*nls_codepage
;
158 struct cifs_ses
*ses
;
159 struct TCP_Server_Info
*server
;
162 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
163 * check for tcp and smb session status done differently
164 * for those three - in the calling routine.
169 if (smb2_command
== SMB2_TREE_CONNECT
)
172 if (tcon
->tidStatus
== CifsExiting
) {
174 * only tree disconnect, open, and write,
175 * (and ulogoff which does not have tcon)
176 * are allowed as we start force umount.
178 if ((smb2_command
!= SMB2_WRITE
) &&
179 (smb2_command
!= SMB2_CREATE
) &&
180 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
181 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
186 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
187 (!tcon
->ses
->server
))
191 server
= ses
->server
;
194 * Give demultiplex thread up to 10 seconds to reconnect, should be
195 * greater than cifs socket timeout which is 7 seconds
197 while (server
->tcpStatus
== CifsNeedReconnect
) {
199 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
200 * here since they are implicitly done when session drops.
202 switch (smb2_command
) {
204 * BB Should we keep oplock break and add flush to exceptions?
206 case SMB2_TREE_DISCONNECT
:
209 case SMB2_OPLOCK_BREAK
:
213 wait_event_interruptible_timeout(server
->response_q
,
214 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
216 /* are we still trying to reconnect? */
217 if (server
->tcpStatus
!= CifsNeedReconnect
)
221 * on "soft" mounts we wait once. Hard mounts keep
222 * retrying until process is killed or server comes
226 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
231 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
234 nls_codepage
= load_nls_default();
237 * need to prevent multiple threads trying to simultaneously reconnect
238 * the same SMB session
240 mutex_lock(&tcon
->ses
->session_mutex
);
243 * Recheck after acquire mutex. If another thread is negotiating
244 * and the server never sends an answer the socket will be closed
245 * and tcpStatus set to reconnect.
247 if (server
->tcpStatus
== CifsNeedReconnect
) {
249 mutex_unlock(&tcon
->ses
->session_mutex
);
253 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
254 if (!rc
&& tcon
->ses
->need_reconnect
)
255 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
257 if (rc
|| !tcon
->need_reconnect
) {
258 mutex_unlock(&tcon
->ses
->session_mutex
);
262 cifs_mark_open_files_invalid(tcon
);
263 if (tcon
->use_persistent
)
264 tcon
->need_reopen_files
= true;
266 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
267 mutex_unlock(&tcon
->ses
->session_mutex
);
269 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
273 if (smb2_command
!= SMB2_INTERNAL_CMD
)
274 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
276 atomic_inc(&tconInfoReconnectCount
);
279 * Check if handle based operation so we know whether we can continue
280 * or not without returning to caller to reset file handle.
283 * BB Is flush done by server on drop of tcp session? Should we special
284 * case it and skip above?
286 switch (smb2_command
) {
292 case SMB2_QUERY_DIRECTORY
:
293 case SMB2_CHANGE_NOTIFY
:
294 case SMB2_QUERY_INFO
:
298 unload_nls(nls_codepage
);
303 fill_small_buf(__le16 smb2_command
, struct cifs_tcon
*tcon
, void *buf
,
304 unsigned int *total_len
)
306 struct smb2_sync_pdu
*spdu
= (struct smb2_sync_pdu
*)buf
;
307 /* lookup word count ie StructureSize from table */
308 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_command
)];
311 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
312 * largest operations (Create)
316 smb2_hdr_assemble(&spdu
->sync_hdr
, smb2_command
, tcon
);
317 spdu
->StructureSize2
= cpu_to_le16(parmsize
);
319 *total_len
= parmsize
+ sizeof(struct smb2_sync_hdr
);
322 /* init request without RFC1001 length at the beginning */
324 smb2_plain_req_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
325 void **request_buf
, unsigned int *total_len
)
328 struct smb2_sync_hdr
*shdr
;
330 rc
= smb2_reconnect(smb2_command
, tcon
);
334 /* BB eventually switch this to SMB2 specific small buf size */
335 *request_buf
= cifs_small_buf_get();
336 if (*request_buf
== NULL
) {
337 /* BB should we add a retry in here if not a writepage? */
341 shdr
= (struct smb2_sync_hdr
*)(*request_buf
);
343 fill_small_buf(smb2_command
, tcon
, shdr
, total_len
);
346 #ifdef CONFIG_CIFS_STATS2
347 uint16_t com_code
= le16_to_cpu(smb2_command
);
349 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
351 cifs_stats_inc(&tcon
->num_smbs_sent
);
358 * Allocate and return pointer to an SMB request hdr, and set basic
359 * SMB information in the SMB header. If the return code is zero, this
360 * function must have filled in request_buf pointer. The returned buffer
361 * has RFC1001 length at the beginning.
364 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
368 unsigned int total_len
;
369 struct smb2_pdu
*pdu
;
371 rc
= smb2_reconnect(smb2_command
, tcon
);
375 /* BB eventually switch this to SMB2 specific small buf size */
376 *request_buf
= cifs_small_buf_get();
377 if (*request_buf
== NULL
) {
378 /* BB should we add a retry in here if not a writepage? */
382 pdu
= (struct smb2_pdu
*)(*request_buf
);
384 fill_small_buf(smb2_command
, tcon
, get_sync_hdr(pdu
), &total_len
);
386 /* Note this is only network field converted to big endian */
387 pdu
->hdr
.smb2_buf_length
= cpu_to_be32(total_len
);
390 #ifdef CONFIG_CIFS_STATS2
391 uint16_t com_code
= le16_to_cpu(smb2_command
);
392 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
394 cifs_stats_inc(&tcon
->num_smbs_sent
);
400 #ifdef CONFIG_CIFS_SMB311
401 /* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
402 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
405 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
406 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
409 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
411 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
412 pneg_ctxt
->DataLength
= cpu_to_le16(38);
413 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
414 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
415 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
416 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
420 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
422 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
423 pneg_ctxt
->DataLength
= cpu_to_le16(6);
424 pneg_ctxt
->CipherCount
= cpu_to_le16(2);
425 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_GCM
;
426 pneg_ctxt
->Ciphers
[1] = SMB2_ENCRYPTION_AES128_CCM
;
430 assemble_neg_contexts(struct smb2_negotiate_req
*req
)
433 /* +4 is to account for the RFC1001 len field */
434 char *pneg_ctxt
= (char *)req
+ OFFSET_OF_NEG_CONTEXT
+ 4;
436 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
437 /* Add 2 to size to round to 8 byte boundary */
438 pneg_ctxt
+= 2 + sizeof(struct smb2_preauth_neg_context
);
439 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
440 req
->NegotiateContextOffset
= cpu_to_le32(OFFSET_OF_NEG_CONTEXT
);
441 req
->NegotiateContextCount
= cpu_to_le16(2);
442 inc_rfc1001_len(req
, 4 + sizeof(struct smb2_preauth_neg_context
)
443 + sizeof(struct smb2_encryption_neg_context
)); /* calculate hash */
446 static void assemble_neg_contexts(struct smb2_negotiate_req
*req
)
454 * SMB2 Worker functions follow:
456 * The general structure of the worker functions is:
457 * 1) Call smb2_init (assembles SMB2 header)
458 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
459 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
460 * 4) Decode SMB2 command specific fields in the fixed length area
461 * 5) Decode variable length data area (if any for this SMB2 command type)
462 * 6) Call free smb buffer
468 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
470 struct smb2_negotiate_req
*req
;
471 struct smb2_negotiate_rsp
*rsp
;
476 struct TCP_Server_Info
*server
= ses
->server
;
477 int blob_offset
, blob_length
;
479 int flags
= CIFS_NEG_OP
;
481 cifs_dbg(FYI
, "Negotiate protocol\n");
484 WARN(1, "%s: server is NULL!\n", __func__
);
488 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
492 req
->hdr
.sync_hdr
.SessionId
= 0;
494 if (strcmp(ses
->server
->vals
->version_string
,
495 SMB3ANY_VERSION_STRING
) == 0) {
496 req
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
497 req
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
498 req
->DialectCount
= cpu_to_le16(2);
499 inc_rfc1001_len(req
, 4);
500 } else if (strcmp(ses
->server
->vals
->version_string
,
501 SMBDEFAULT_VERSION_STRING
) == 0) {
502 req
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
503 req
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
504 req
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
505 req
->DialectCount
= cpu_to_le16(3);
506 inc_rfc1001_len(req
, 6);
508 /* otherwise send specific dialect */
509 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
510 req
->DialectCount
= cpu_to_le16(1);
511 inc_rfc1001_len(req
, 2);
514 /* only one of SMB2 signing flags may be set in SMB2 request */
516 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
517 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
518 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
520 req
->SecurityMode
= 0;
522 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
524 /* ClientGUID must be zero for SMB2.02 dialect */
525 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
526 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
528 memcpy(req
->ClientGUID
, server
->client_guid
,
529 SMB2_CLIENT_GUID_SIZE
);
530 if (ses
->server
->vals
->protocol_id
== SMB311_PROT_ID
)
531 assemble_neg_contexts(req
);
533 iov
[0].iov_base
= (char *)req
;
534 /* 4 for rfc1002 length field */
535 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
537 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
538 cifs_small_buf_release(req
);
539 rsp
= (struct smb2_negotiate_rsp
*)rsp_iov
.iov_base
;
541 * No tcon so can't do
542 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
544 if (rc
== -EOPNOTSUPP
) {
545 cifs_dbg(VFS
, "Dialect not supported by server. Consider "
546 "specifying vers=1.0 or vers=2.0 on mount for accessing"
552 if (strcmp(ses
->server
->vals
->version_string
,
553 SMB3ANY_VERSION_STRING
) == 0) {
554 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
556 "SMB2 dialect returned but not requested\n");
558 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
560 "SMB2.1 dialect returned but not requested\n");
563 } else if (strcmp(ses
->server
->vals
->version_string
,
564 SMBDEFAULT_VERSION_STRING
) == 0) {
565 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
567 "SMB2 dialect returned but not requested\n");
569 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
570 /* ops set to 3.0 by default for default so update */
571 ses
->server
->ops
= &smb21_operations
;
573 } else if (le16_to_cpu(rsp
->DialectRevision
) !=
574 ses
->server
->vals
->protocol_id
) {
575 /* if requested single dialect ensure returned dialect matched */
576 cifs_dbg(VFS
, "Illegal 0x%x dialect returned: not requested\n",
577 le16_to_cpu(rsp
->DialectRevision
));
581 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
583 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
584 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
585 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
586 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
587 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
588 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
589 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
590 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
591 #ifdef CONFIG_CIFS_SMB311
592 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
593 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
596 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
597 le16_to_cpu(rsp
->DialectRevision
));
601 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
603 /* BB: add check that dialect was valid given dialect(s) we asked for */
605 /* SMB2 only has an extended negflavor */
606 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
607 /* set it to the maximum buffer size value we can send with 1 credit */
608 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
609 SMB2_MAX_BUFFER_SIZE
);
610 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
611 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
612 /* BB Do we need to validate the SecurityMode? */
613 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
614 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
616 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
618 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
621 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
623 * ses->sectype = RawNTLMSSP;
624 * but for time being this is our only auth choice so doesn't matter.
625 * We just found a server which sets blob length to zero expecting raw.
627 if (blob_length
== 0) {
628 cifs_dbg(FYI
, "missing security blob on negprot\n");
629 server
->sec_ntlmssp
= true;
632 rc
= cifs_enable_signing(server
, ses
->sign
);
636 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
643 free_rsp_buf(resp_buftype
, rsp
);
647 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
650 struct validate_negotiate_info_req vneg_inbuf
;
651 struct validate_negotiate_info_rsp
*pneg_rsp
= NULL
;
653 u32 inbuflen
; /* max of 4 dialects */
655 cifs_dbg(FYI
, "validate negotiate\n");
658 * validation ioctl must be signed, so no point sending this if we
659 * can not sign it (ie are not known user). Even if signing is not
660 * required (enabled but not negotiated), in those cases we selectively
661 * sign just this, the first and only signed request on a connection.
662 * Having validation of negotiate info helps reduce attack vectors.
664 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
)
665 return 0; /* validation requires signing */
667 if (tcon
->ses
->user_name
== NULL
) {
668 cifs_dbg(FYI
, "Can't validate negotiate: null user mount\n");
669 return 0; /* validation requires signing */
672 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_NULL
)
673 cifs_dbg(VFS
, "Unexpected null user (anonymous) auth flag sent by server\n");
675 vneg_inbuf
.Capabilities
=
676 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
677 memcpy(vneg_inbuf
.Guid
, tcon
->ses
->server
->client_guid
,
678 SMB2_CLIENT_GUID_SIZE
);
681 vneg_inbuf
.SecurityMode
=
682 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
683 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
684 vneg_inbuf
.SecurityMode
=
685 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
687 vneg_inbuf
.SecurityMode
= 0;
690 if (strcmp(tcon
->ses
->server
->vals
->version_string
,
691 SMB3ANY_VERSION_STRING
) == 0) {
692 vneg_inbuf
.Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
693 vneg_inbuf
.Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
694 vneg_inbuf
.DialectCount
= cpu_to_le16(2);
695 /* structure is big enough for 3 dialects, sending only 2 */
696 inbuflen
= sizeof(struct validate_negotiate_info_req
) - 2;
697 } else if (strcmp(tcon
->ses
->server
->vals
->version_string
,
698 SMBDEFAULT_VERSION_STRING
) == 0) {
699 vneg_inbuf
.Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
700 vneg_inbuf
.Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
701 vneg_inbuf
.Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
702 vneg_inbuf
.DialectCount
= cpu_to_le16(3);
703 /* structure is big enough for 3 dialects */
704 inbuflen
= sizeof(struct validate_negotiate_info_req
);
706 /* otherwise specific dialect was requested */
707 vneg_inbuf
.Dialects
[0] =
708 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
709 vneg_inbuf
.DialectCount
= cpu_to_le16(1);
710 /* structure is big enough for 3 dialects, sending only 1 */
711 inbuflen
= sizeof(struct validate_negotiate_info_req
) - 4;
714 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
715 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
717 (char *)&vneg_inbuf
, sizeof(struct validate_negotiate_info_req
),
718 (char **)&pneg_rsp
, &rsplen
);
721 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
725 if (rsplen
!= sizeof(struct validate_negotiate_info_rsp
)) {
726 cifs_dbg(VFS
, "invalid protocol negotiate response size: %d\n",
729 /* relax check since Mac returns max bufsize allowed on ioctl */
730 if ((rsplen
> CIFSMaxBufSize
)
731 || (rsplen
< sizeof(struct validate_negotiate_info_rsp
)))
735 /* check validate negotiate info response matches what we got earlier */
736 if (pneg_rsp
->Dialect
!=
737 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
))
740 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
743 /* do not validate server guid because not saved at negprot time yet */
745 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
746 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
749 /* validate negotiate successful */
750 cifs_dbg(FYI
, "validate negotiate info successful\n");
755 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
762 smb2_select_sectype(struct TCP_Server_Info
*server
, enum securityEnum requested
)
771 if (server
->sec_ntlmssp
&&
772 (global_secflags
& CIFSSEC_MAY_NTLMSSP
))
774 if ((server
->sec_kerberos
|| server
->sec_mskerberos
) &&
775 (global_secflags
& CIFSSEC_MAY_KRB5
))
783 struct SMB2_sess_data
{
785 struct cifs_ses
*ses
;
786 struct nls_table
*nls_cp
;
787 void (*func
)(struct SMB2_sess_data
*);
789 u64 previous_session
;
791 /* we will send the SMB in three pieces:
792 * a fixed length beginning part, an optional
793 * SPNEGO blob (which can be zero length), and a
794 * last part which will include the strings
795 * and rest of bcc area. This allows us to avoid
796 * a large buffer 17K allocation
803 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
806 struct cifs_ses
*ses
= sess_data
->ses
;
807 struct smb2_sess_setup_req
*req
;
808 struct TCP_Server_Info
*server
= ses
->server
;
810 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
814 /* First session, not a reauthenticate */
815 req
->hdr
.sync_hdr
.SessionId
= 0;
817 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
818 req
->PreviousSessionId
= sess_data
->previous_session
;
820 req
->Flags
= 0; /* MBZ */
821 /* to enable echos and oplocks */
822 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(3);
824 /* only one of SMB2 signing flags may be set in SMB2 request */
826 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
827 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
828 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
830 req
->SecurityMode
= 0;
832 req
->Capabilities
= 0;
833 req
->Channel
= 0; /* MBZ */
835 sess_data
->iov
[0].iov_base
= (char *)req
;
836 /* 4 for rfc1002 length field and 1 for pad */
837 sess_data
->iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
839 * This variable will be used to clear the buffer
840 * allocated above in case of any error in the calling function.
842 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
848 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
850 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
851 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
855 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
858 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
859 struct kvec rsp_iov
= { NULL
, 0 };
861 /* Testing shows that buffer offset must be at location of Buffer[0] */
862 req
->SecurityBufferOffset
=
863 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
864 1 /* pad */ - 4 /* rfc1001 len */);
865 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
867 inc_rfc1001_len(req
, sess_data
->iov
[1].iov_len
- 1 /* pad */);
869 /* BB add code to build os and lm fields */
871 rc
= SendReceive2(sess_data
->xid
, sess_data
->ses
,
873 &sess_data
->buf0_type
,
874 CIFS_LOG_ERROR
| CIFS_NEG_OP
, &rsp_iov
);
875 cifs_small_buf_release(sess_data
->iov
[0].iov_base
);
876 memcpy(&sess_data
->iov
[0], &rsp_iov
, sizeof(struct kvec
));
882 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
885 struct cifs_ses
*ses
= sess_data
->ses
;
887 mutex_lock(&ses
->server
->srv_mutex
);
888 if (ses
->server
->ops
->generate_signingkey
) {
889 rc
= ses
->server
->ops
->generate_signingkey(ses
);
892 "SMB3 session key generation failed\n");
893 mutex_unlock(&ses
->server
->srv_mutex
);
897 if (!ses
->server
->session_estab
) {
898 ses
->server
->sequence_number
= 0x2;
899 ses
->server
->session_estab
= true;
901 mutex_unlock(&ses
->server
->srv_mutex
);
903 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
904 spin_lock(&GlobalMid_Lock
);
905 ses
->status
= CifsGood
;
906 ses
->need_reconnect
= false;
907 spin_unlock(&GlobalMid_Lock
);
911 #ifdef CONFIG_CIFS_UPCALL
913 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
916 struct cifs_ses
*ses
= sess_data
->ses
;
917 struct cifs_spnego_msg
*msg
;
918 struct key
*spnego_key
= NULL
;
919 struct smb2_sess_setup_rsp
*rsp
= NULL
;
921 rc
= SMB2_sess_alloc_buffer(sess_data
);
925 spnego_key
= cifs_get_spnego_key(ses
);
926 if (IS_ERR(spnego_key
)) {
927 rc
= PTR_ERR(spnego_key
);
932 msg
= spnego_key
->payload
.data
[0];
934 * check version field to make sure that cifs.upcall is
935 * sending us a response in an expected form
937 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
939 "bad cifs.upcall version. Expected %d got %d",
940 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
942 goto out_put_spnego_key
;
945 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
947 if (!ses
->auth_key
.response
) {
949 "Kerberos can't allocate (%u bytes) memory",
952 goto out_put_spnego_key
;
954 ses
->auth_key
.len
= msg
->sesskey_len
;
956 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
957 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
959 rc
= SMB2_sess_sendreceive(sess_data
);
961 goto out_put_spnego_key
;
963 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
964 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
966 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
968 rc
= SMB2_sess_establish_session(sess_data
);
970 key_invalidate(spnego_key
);
973 sess_data
->result
= rc
;
974 sess_data
->func
= NULL
;
975 SMB2_sess_free_buffer(sess_data
);
979 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
981 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
982 sess_data
->result
= -EOPNOTSUPP
;
983 sess_data
->func
= NULL
;
988 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
991 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
994 struct cifs_ses
*ses
= sess_data
->ses
;
995 struct smb2_sess_setup_rsp
*rsp
= NULL
;
996 char *ntlmssp_blob
= NULL
;
997 bool use_spnego
= false; /* else use raw ntlmssp */
1001 * If memory allocation is successful, caller of this function
1004 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
1005 if (!ses
->ntlmssp
) {
1009 ses
->ntlmssp
->sesskey_per_smbsess
= true;
1011 rc
= SMB2_sess_alloc_buffer(sess_data
);
1015 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
1017 if (ntlmssp_blob
== NULL
) {
1022 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
1024 /* BB eventually need to add this */
1025 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1029 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
1030 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1032 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1033 sess_data
->iov
[1].iov_len
= blob_length
;
1035 rc
= SMB2_sess_sendreceive(sess_data
);
1036 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1038 /* If true, rc here is expected and not an error */
1039 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
1040 rsp
->hdr
.sync_hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
1046 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
1047 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
1048 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
1049 le16_to_cpu(rsp
->SecurityBufferOffset
));
1053 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
1054 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
1058 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
1061 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
1062 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1065 kfree(ntlmssp_blob
);
1066 SMB2_sess_free_buffer(sess_data
);
1068 sess_data
->result
= 0;
1069 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
1073 kfree(ses
->ntlmssp
);
1074 ses
->ntlmssp
= NULL
;
1075 sess_data
->result
= rc
;
1076 sess_data
->func
= NULL
;
1080 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
1083 struct cifs_ses
*ses
= sess_data
->ses
;
1084 struct smb2_sess_setup_req
*req
;
1085 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1086 unsigned char *ntlmssp_blob
= NULL
;
1087 bool use_spnego
= false; /* else use raw ntlmssp */
1088 u16 blob_length
= 0;
1090 rc
= SMB2_sess_alloc_buffer(sess_data
);
1094 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
1095 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1097 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
, ses
,
1100 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
1105 /* BB eventually need to add this */
1106 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1110 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1111 sess_data
->iov
[1].iov_len
= blob_length
;
1113 rc
= SMB2_sess_sendreceive(sess_data
);
1117 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1119 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
1120 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1122 rc
= SMB2_sess_establish_session(sess_data
);
1124 kfree(ntlmssp_blob
);
1125 SMB2_sess_free_buffer(sess_data
);
1126 kfree(ses
->ntlmssp
);
1127 ses
->ntlmssp
= NULL
;
1128 sess_data
->result
= rc
;
1129 sess_data
->func
= NULL
;
1133 SMB2_select_sec(struct cifs_ses
*ses
, struct SMB2_sess_data
*sess_data
)
1137 type
= smb2_select_sectype(ses
->server
, ses
->sectype
);
1138 cifs_dbg(FYI
, "sess setup type %d\n", type
);
1139 if (type
== Unspecified
) {
1141 "Unable to select appropriate authentication method!");
1147 sess_data
->func
= SMB2_auth_kerberos
;
1150 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
1153 cifs_dbg(VFS
, "secType %d not supported!\n", type
);
1161 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
1162 const struct nls_table
*nls_cp
)
1165 struct TCP_Server_Info
*server
= ses
->server
;
1166 struct SMB2_sess_data
*sess_data
;
1168 cifs_dbg(FYI
, "Session Setup\n");
1171 WARN(1, "%s: server is NULL!\n", __func__
);
1175 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
1179 rc
= SMB2_select_sec(ses
, sess_data
);
1182 sess_data
->xid
= xid
;
1183 sess_data
->ses
= ses
;
1184 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1185 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1187 while (sess_data
->func
)
1188 sess_data
->func(sess_data
);
1190 if ((ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
) && (ses
->sign
))
1191 cifs_dbg(VFS
, "signing requested but authenticated as guest\n");
1192 rc
= sess_data
->result
;
1199 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1201 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1203 struct TCP_Server_Info
*server
;
1206 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1208 if (ses
&& (ses
->server
))
1209 server
= ses
->server
;
1213 /* no need to send SMB logoff if uid already closed due to reconnect */
1214 if (ses
->need_reconnect
)
1215 goto smb2_session_already_dead
;
1217 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
1221 /* since no tcon, smb2_init can not do this, so do here */
1222 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1224 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
1225 flags
|= CIFS_TRANSFORM_REQ
;
1226 else if (server
->sign
)
1227 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1229 rc
= SendReceiveNoRsp(xid
, ses
, (char *) req
, flags
);
1230 cifs_small_buf_release(req
);
1232 * No tcon so can't do
1233 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1236 smb2_session_already_dead
:
1240 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1242 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1245 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1247 /* These are similar values to what Windows uses */
1248 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1250 tcon
->max_chunks
= 256;
1251 tcon
->max_bytes_chunk
= 1048576;
1252 tcon
->max_bytes_copy
= 16777216;
1256 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1257 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1259 struct smb2_tree_connect_req
*req
;
1260 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1262 struct kvec rsp_iov
= { NULL
, 0 };
1266 __le16
*unc_path
= NULL
;
1269 cifs_dbg(FYI
, "TCON\n");
1271 if (!(ses
->server
) || !tree
)
1274 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1275 if (unc_path
== NULL
)
1278 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1280 if (unc_path_len
< 2) {
1285 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1289 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
1296 if ((ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
))
1297 flags
|= CIFS_TRANSFORM_REQ
;
1299 /* since no tcon, smb2_init can not do this, so do here */
1300 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1301 if (ses
->server
->sign
)
1302 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1303 } else if (encryption_required(tcon
))
1304 flags
|= CIFS_TRANSFORM_REQ
;
1306 iov
[0].iov_base
= (char *)req
;
1307 /* 4 for rfc1002 length field and 1 for pad */
1308 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1310 /* Testing shows that buffer offset must be at location of Buffer[0] */
1311 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1312 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1313 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1314 iov
[1].iov_base
= unc_path
;
1315 iov
[1].iov_len
= unc_path_len
;
1317 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
1319 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, flags
, &rsp_iov
);
1320 cifs_small_buf_release(req
);
1321 rsp
= (struct smb2_tree_connect_rsp
*)rsp_iov
.iov_base
;
1325 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1326 tcon
->need_reconnect
= true;
1328 goto tcon_error_exit
;
1332 ses
->ipc_tid
= rsp
->hdr
.sync_hdr
.TreeId
;
1336 switch (rsp
->ShareType
) {
1337 case SMB2_SHARE_TYPE_DISK
:
1338 cifs_dbg(FYI
, "connection to disk share\n");
1340 case SMB2_SHARE_TYPE_PIPE
:
1342 cifs_dbg(FYI
, "connection to pipe share\n");
1344 case SMB2_SHARE_TYPE_PRINT
:
1346 cifs_dbg(FYI
, "connection to printer\n");
1349 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1351 goto tcon_error_exit
;
1354 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1355 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1356 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1357 tcon
->tidStatus
= CifsGood
;
1358 tcon
->need_reconnect
= false;
1359 tcon
->tid
= rsp
->hdr
.sync_hdr
.TreeId
;
1360 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1362 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1363 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1364 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1367 !(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
1368 cifs_dbg(VFS
, "Encryption is requested but not supported\n");
1370 init_copy_chunk_defaults(tcon
);
1371 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1372 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1374 free_rsp_buf(resp_buftype
, rsp
);
1379 if (rsp
&& rsp
->hdr
.sync_hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1380 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1386 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1388 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1390 struct cifs_ses
*ses
= tcon
->ses
;
1393 cifs_dbg(FYI
, "Tree Disconnect\n");
1395 if (!ses
|| !(ses
->server
))
1398 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1401 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
1405 if (encryption_required(tcon
))
1406 flags
|= CIFS_TRANSFORM_REQ
;
1408 rc
= SendReceiveNoRsp(xid
, ses
, (char *)req
, flags
);
1409 cifs_small_buf_release(req
);
1411 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1417 static struct create_durable
*
1418 create_durable_buf(void)
1420 struct create_durable
*buf
;
1422 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1426 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1427 (struct create_durable
, Data
));
1428 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1429 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1430 (struct create_durable
, Name
));
1431 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1432 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1440 static struct create_durable
*
1441 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1443 struct create_durable
*buf
;
1445 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1449 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1450 (struct create_durable
, Data
));
1451 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1452 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1453 (struct create_durable
, Name
));
1454 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1455 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1456 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1457 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1466 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1467 unsigned int *epoch
)
1470 struct create_context
*cc
;
1472 unsigned int remaining
;
1475 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
1476 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
1477 cc
= (struct create_context
*)data_offset
;
1478 while (remaining
>= sizeof(struct create_context
)) {
1479 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1480 if (le16_to_cpu(cc
->NameLength
) == 4 &&
1481 strncmp(name
, "RqLs", 4) == 0)
1482 return server
->ops
->parse_lease_buf(cc
, epoch
);
1484 next
= le32_to_cpu(cc
->Next
);
1488 cc
= (struct create_context
*)((char *)cc
+ next
);
1495 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1496 unsigned int *num_iovec
, __u8
*oplock
)
1498 struct smb2_create_req
*req
= iov
[0].iov_base
;
1499 unsigned int num
= *num_iovec
;
1501 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1502 if (iov
[num
].iov_base
== NULL
)
1504 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1505 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1506 if (!req
->CreateContextsOffset
)
1507 req
->CreateContextsOffset
= cpu_to_le32(
1508 sizeof(struct smb2_create_req
) - 4 +
1509 iov
[num
- 1].iov_len
);
1510 le32_add_cpu(&req
->CreateContextsLength
,
1511 server
->vals
->create_lease_size
);
1512 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
1513 *num_iovec
= num
+ 1;
1517 static struct create_durable_v2
*
1518 create_durable_v2_buf(struct cifs_fid
*pfid
)
1520 struct create_durable_v2
*buf
;
1522 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1526 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1527 (struct create_durable_v2
, dcontext
));
1528 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1529 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1530 (struct create_durable_v2
, Name
));
1531 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1533 buf
->dcontext
.Timeout
= 0; /* Should this be configurable by workload */
1534 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1535 generate_random_uuid(buf
->dcontext
.CreateGuid
);
1536 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1538 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1546 static struct create_durable_handle_reconnect_v2
*
1547 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1549 struct create_durable_handle_reconnect_v2
*buf
;
1551 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1556 buf
->ccontext
.DataOffset
=
1557 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1559 buf
->ccontext
.DataLength
=
1560 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1561 buf
->ccontext
.NameOffset
=
1562 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1564 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1566 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1567 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1568 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1569 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1571 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1580 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1581 struct cifs_open_parms
*oparms
)
1583 struct smb2_create_req
*req
= iov
[0].iov_base
;
1584 unsigned int num
= *num_iovec
;
1586 iov
[num
].iov_base
= create_durable_v2_buf(oparms
->fid
);
1587 if (iov
[num
].iov_base
== NULL
)
1589 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1590 if (!req
->CreateContextsOffset
)
1591 req
->CreateContextsOffset
=
1592 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1594 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1595 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable_v2
));
1596 *num_iovec
= num
+ 1;
1601 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1602 struct cifs_open_parms
*oparms
)
1604 struct smb2_create_req
*req
= iov
[0].iov_base
;
1605 unsigned int num
= *num_iovec
;
1607 /* indicate that we don't need to relock the file */
1608 oparms
->reconnect
= false;
1610 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1611 if (iov
[num
].iov_base
== NULL
)
1613 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1614 if (!req
->CreateContextsOffset
)
1615 req
->CreateContextsOffset
=
1616 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1618 le32_add_cpu(&req
->CreateContextsLength
,
1619 sizeof(struct create_durable_handle_reconnect_v2
));
1620 inc_rfc1001_len(&req
->hdr
,
1621 sizeof(struct create_durable_handle_reconnect_v2
));
1622 *num_iovec
= num
+ 1;
1627 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1628 struct cifs_open_parms
*oparms
, bool use_persistent
)
1630 struct smb2_create_req
*req
= iov
[0].iov_base
;
1631 unsigned int num
= *num_iovec
;
1633 if (use_persistent
) {
1634 if (oparms
->reconnect
)
1635 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1638 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1641 if (oparms
->reconnect
) {
1642 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1643 /* indicate that we don't need to relock the file */
1644 oparms
->reconnect
= false;
1646 iov
[num
].iov_base
= create_durable_buf();
1647 if (iov
[num
].iov_base
== NULL
)
1649 iov
[num
].iov_len
= sizeof(struct create_durable
);
1650 if (!req
->CreateContextsOffset
)
1651 req
->CreateContextsOffset
=
1652 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1654 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1655 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
1656 *num_iovec
= num
+ 1;
1661 alloc_path_with_tree_prefix(__le16
**out_path
, int *out_size
, int *out_len
,
1662 const char *treename
, const __le16
*path
)
1664 int treename_len
, path_len
;
1665 struct nls_table
*cp
;
1666 const __le16 sep
[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1671 treename_len
= strlen(treename
);
1672 if (treename_len
< 2 || !(treename
[0] == '\\' && treename
[1] == '\\'))
1678 path_len
= UniStrnlen((wchar_t *)path
, PATH_MAX
);
1681 * make room for one path separator between the treename and
1684 *out_len
= treename_len
+ 1 + path_len
;
1687 * final path needs to be null-terminated UTF16 with a
1691 *out_size
= roundup((*out_len
+1)*2, 8);
1692 *out_path
= kzalloc(*out_size
, GFP_KERNEL
);
1696 cp
= load_nls_default();
1697 cifs_strtoUTF16(*out_path
, treename
, treename_len
, cp
);
1698 UniStrcat(*out_path
, sep
);
1699 UniStrcat(*out_path
, path
);
1706 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1707 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1708 struct smb2_err_rsp
**err_buf
)
1710 struct smb2_create_req
*req
;
1711 struct smb2_create_rsp
*rsp
;
1712 struct TCP_Server_Info
*server
;
1713 struct cifs_tcon
*tcon
= oparms
->tcon
;
1714 struct cifs_ses
*ses
= tcon
->ses
;
1716 struct kvec rsp_iov
= {NULL
, 0};
1719 __le16
*copy_path
= NULL
;
1722 unsigned int n_iov
= 2;
1723 __u32 file_attributes
= 0;
1724 char *dhc_buf
= NULL
, *lc_buf
= NULL
;
1727 cifs_dbg(FYI
, "create/open\n");
1729 if (ses
&& (ses
->server
))
1730 server
= ses
->server
;
1734 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1738 if (encryption_required(tcon
))
1739 flags
|= CIFS_TRANSFORM_REQ
;
1741 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1742 file_attributes
|= ATTR_READONLY
;
1743 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
1744 file_attributes
|= ATTR_SYSTEM
;
1746 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1747 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1748 /* File attributes ignored on open (used in create though) */
1749 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1750 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1751 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1752 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1754 iov
[0].iov_base
= (char *)req
;
1755 /* 4 for rfc1002 length field */
1756 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1757 /* -1 since last byte is buf[0] which is sent below (path) */
1760 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
1762 /* [MS-SMB2] 2.2.13 NameOffset:
1763 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1764 * the SMB2 header, the file name includes a prefix that will
1765 * be processed during DFS name normalization as specified in
1766 * section 3.3.5.9. Otherwise, the file name is relative to
1767 * the share that is identified by the TreeId in the SMB2
1770 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
1773 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
1774 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
1776 tcon
->treeName
, path
);
1779 req
->NameLength
= cpu_to_le16(name_len
* 2);
1780 uni_path_len
= copy_size
;
1783 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1784 /* MUST set path len (NameLength) to 0 opening root of share */
1785 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1786 if (uni_path_len
% 8 != 0) {
1787 copy_size
= roundup(uni_path_len
, 8);
1788 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1791 memcpy((char *)copy_path
, (const char *)path
,
1793 uni_path_len
= copy_size
;
1798 iov
[1].iov_len
= uni_path_len
;
1799 iov
[1].iov_base
= path
;
1800 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1801 inc_rfc1001_len(req
, uni_path_len
- 1);
1803 if (!server
->oplocks
)
1804 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1806 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1807 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1808 req
->RequestedOplockLevel
= *oplock
;
1810 rc
= add_lease_context(server
, iov
, &n_iov
, oplock
);
1812 cifs_small_buf_release(req
);
1816 lc_buf
= iov
[n_iov
-1].iov_base
;
1819 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1820 /* need to set Next field of lease context if we request it */
1821 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
1822 struct create_context
*ccontext
=
1823 (struct create_context
*)iov
[n_iov
-1].iov_base
;
1825 cpu_to_le32(server
->vals
->create_lease_size
);
1828 rc
= add_durable_context(iov
, &n_iov
, oparms
,
1829 tcon
->use_persistent
);
1831 cifs_small_buf_release(req
);
1836 dhc_buf
= iov
[n_iov
-1].iov_base
;
1839 rc
= SendReceive2(xid
, ses
, iov
, n_iov
, &resp_buftype
, flags
, &rsp_iov
);
1840 cifs_small_buf_release(req
);
1841 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
1844 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1846 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1851 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1852 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1855 memcpy(buf
, &rsp
->CreationTime
, 32);
1856 buf
->AllocationSize
= rsp
->AllocationSize
;
1857 buf
->EndOfFile
= rsp
->EndofFile
;
1858 buf
->Attributes
= rsp
->FileAttributes
;
1859 buf
->NumberOfLinks
= cpu_to_le32(1);
1860 buf
->DeletePending
= 0;
1863 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1864 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1866 *oplock
= rsp
->OplockLevel
;
1871 free_rsp_buf(resp_buftype
, rsp
);
1876 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1879 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1880 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, bool use_ipc
,
1881 char *in_data
, u32 indatalen
,
1882 char **out_data
, u32
*plen
/* returned data len */)
1884 struct smb2_ioctl_req
*req
;
1885 struct smb2_ioctl_rsp
*rsp
;
1886 struct smb2_sync_hdr
*shdr
;
1887 struct cifs_ses
*ses
;
1889 struct kvec rsp_iov
;
1895 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1897 if (out_data
!= NULL
)
1900 /* zero out returned data len, in case of error */
1909 if (!ses
|| !(ses
->server
))
1912 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1917 if (ses
->ipc_tid
== 0) {
1918 cifs_small_buf_release(req
);
1922 cifs_dbg(FYI
, "replacing tid 0x%x with IPC tid 0x%x\n",
1923 req
->hdr
.sync_hdr
.TreeId
, ses
->ipc_tid
);
1924 req
->hdr
.sync_hdr
.TreeId
= ses
->ipc_tid
;
1926 if (encryption_required(tcon
))
1927 flags
|= CIFS_TRANSFORM_REQ
;
1929 req
->CtlCode
= cpu_to_le32(opcode
);
1930 req
->PersistentFileId
= persistent_fid
;
1931 req
->VolatileFileId
= volatile_fid
;
1934 req
->InputCount
= cpu_to_le32(indatalen
);
1935 /* do not set InputOffset if no input data */
1937 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1938 iov
[1].iov_base
= in_data
;
1939 iov
[1].iov_len
= indatalen
;
1944 req
->OutputOffset
= 0;
1945 req
->OutputCount
= 0; /* MBZ */
1948 * Could increase MaxOutputResponse, but that would require more
1949 * than one credit. Windows typically sets this smaller, but for some
1950 * ioctls it may be useful to allow server to send more. No point
1951 * limiting what the server can send as long as fits in one credit
1952 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
1953 * (by default, note that it can be overridden to make max larger)
1954 * in responses (except for read responses which can be bigger.
1955 * We may want to bump this limit up
1957 req
->MaxOutputResponse
= cpu_to_le32(CIFSMaxBufSize
);
1960 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1964 iov
[0].iov_base
= (char *)req
;
1967 * If no input data, the size of ioctl struct in
1968 * protocol spec still includes a 1 byte data buffer,
1969 * but if input data passed to ioctl, we do not
1970 * want to double count this, so we do not send
1971 * the dummy one byte of data in iovec[0] if sending
1972 * input data (in iovec[1]). We also must add 4 bytes
1973 * in first iovec to allow for rfc1002 length field.
1977 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1978 inc_rfc1001_len(req
, indatalen
- 1);
1980 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1982 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
1983 if (opcode
== FSCTL_VALIDATE_NEGOTIATE_INFO
)
1984 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1986 rc
= SendReceive2(xid
, ses
, iov
, n_iov
, &resp_buftype
, flags
, &rsp_iov
);
1987 cifs_small_buf_release(req
);
1988 rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
.iov_base
;
1990 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
1991 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1993 } else if (rc
== -EINVAL
) {
1994 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
1995 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
1996 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
2001 /* check if caller wants to look at return data or just return rc */
2002 if ((plen
== NULL
) || (out_data
== NULL
))
2005 *plen
= le32_to_cpu(rsp
->OutputCount
);
2007 /* We check for obvious errors in the output buffer length and offset */
2009 goto ioctl_exit
; /* server returned no data */
2010 else if (*plen
> 0xFF00) {
2011 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
2017 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
2018 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
2019 le32_to_cpu(rsp
->OutputOffset
));
2025 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
2026 if (*out_data
== NULL
) {
2031 shdr
= get_sync_hdr(rsp
);
2032 memcpy(*out_data
, (char *)shdr
+ le32_to_cpu(rsp
->OutputOffset
), *plen
);
2034 free_rsp_buf(resp_buftype
, rsp
);
2039 * Individual callers to ioctl worker function follow
2043 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
2044 u64 persistent_fid
, u64 volatile_fid
)
2047 struct compress_ioctl fsctl_input
;
2048 char *ret_data
= NULL
;
2050 fsctl_input
.CompressionState
=
2051 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
2053 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
2054 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
2055 false /* use_ipc */,
2056 (char *)&fsctl_input
/* data input */,
2057 2 /* in data len */, &ret_data
/* out data */, NULL
);
2059 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
2065 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
2066 u64 persistent_fid
, u64 volatile_fid
)
2068 struct smb2_close_req
*req
;
2069 struct smb2_close_rsp
*rsp
;
2070 struct cifs_ses
*ses
= tcon
->ses
;
2072 struct kvec rsp_iov
;
2077 cifs_dbg(FYI
, "Close\n");
2079 if (!ses
|| !(ses
->server
))
2082 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
2086 if (encryption_required(tcon
))
2087 flags
|= CIFS_TRANSFORM_REQ
;
2089 req
->PersistentFileId
= persistent_fid
;
2090 req
->VolatileFileId
= volatile_fid
;
2092 iov
[0].iov_base
= (char *)req
;
2093 /* 4 for rfc1002 length field */
2094 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2096 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2097 cifs_small_buf_release(req
);
2098 rsp
= (struct smb2_close_rsp
*)rsp_iov
.iov_base
;
2101 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
2105 /* BB FIXME - decode close response, update inode for caching */
2108 free_rsp_buf(resp_buftype
, rsp
);
2113 validate_buf(unsigned int offset
, unsigned int buffer_length
,
2114 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
2117 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
2118 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
2119 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
2120 char *end_of_buf
= begin_of_buf
+ buffer_length
;
2123 if (buffer_length
< min_buf_size
) {
2124 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
2125 buffer_length
, min_buf_size
);
2129 /* check if beyond RFC1001 maximum length */
2130 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
2131 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
2132 buffer_length
, smb_len
);
2136 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
2137 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
2145 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2146 * Caller must free buffer.
2149 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
2150 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
2154 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
2160 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
2164 memcpy(data
, begin_of_buf
, buffer_length
);
2170 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2171 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
, u8 info_type
,
2172 u32 additional_info
, size_t output_len
, size_t min_len
, void **data
,
2175 struct smb2_query_info_req
*req
;
2176 struct smb2_query_info_rsp
*rsp
= NULL
;
2178 struct kvec rsp_iov
;
2181 struct cifs_ses
*ses
= tcon
->ses
;
2184 cifs_dbg(FYI
, "Query Info\n");
2186 if (!ses
|| !(ses
->server
))
2189 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2193 if (encryption_required(tcon
))
2194 flags
|= CIFS_TRANSFORM_REQ
;
2196 req
->InfoType
= info_type
;
2197 req
->FileInfoClass
= info_class
;
2198 req
->PersistentFileId
= persistent_fid
;
2199 req
->VolatileFileId
= volatile_fid
;
2200 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
2203 * We do not use the input buffer (do not send extra byte)
2205 req
->InputBufferOffset
= 0;
2206 inc_rfc1001_len(req
, -1);
2208 req
->OutputBufferLength
= cpu_to_le32(output_len
);
2210 iov
[0].iov_base
= (char *)req
;
2211 /* 4 for rfc1002 length field */
2212 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2214 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2215 cifs_small_buf_release(req
);
2216 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
2219 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2224 *dlen
= le32_to_cpu(rsp
->OutputBufferLength
);
2226 *data
= kmalloc(*dlen
, GFP_KERNEL
);
2229 "Error %d allocating memory for acl\n",
2237 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2238 le32_to_cpu(rsp
->OutputBufferLength
),
2239 &rsp
->hdr
, min_len
, *data
);
2242 free_rsp_buf(resp_buftype
, rsp
);
2246 int SMB2_query_eas(const unsigned int xid
, struct cifs_tcon
*tcon
,
2247 u64 persistent_fid
, u64 volatile_fid
,
2248 int ea_buf_size
, struct smb2_file_full_ea_info
*data
)
2250 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2251 FILE_FULL_EA_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2253 sizeof(struct smb2_file_full_ea_info
),
2258 int SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2259 u64 persistent_fid
, u64 volatile_fid
, struct smb2_file_all_info
*data
)
2261 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2262 FILE_ALL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2263 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
2264 sizeof(struct smb2_file_all_info
), (void **)&data
,
2269 SMB2_query_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
2270 u64 persistent_fid
, u64 volatile_fid
,
2271 void **data
, u32
*plen
)
2273 __u32 additional_info
= OWNER_SECINFO
| GROUP_SECINFO
| DACL_SECINFO
;
2276 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2277 0, SMB2_O_INFO_SECURITY
, additional_info
,
2278 SMB2_MAX_BUFFER_SIZE
,
2279 sizeof(struct smb2_file_all_info
), data
, plen
);
2283 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
2284 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
2286 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2287 FILE_INTERNAL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2288 sizeof(struct smb2_file_internal_info
),
2289 sizeof(struct smb2_file_internal_info
),
2290 (void **)&uniqueid
, NULL
);
2294 * This is a no-op for now. We're not really interested in the reply, but
2295 * rather in the fact that the server sent one and that server->lstrp
2298 * FIXME: maybe we should consider checking that the reply matches request?
2301 smb2_echo_callback(struct mid_q_entry
*mid
)
2303 struct TCP_Server_Info
*server
= mid
->callback_data
;
2304 struct smb2_echo_rsp
*rsp
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
2305 unsigned int credits_received
= 1;
2307 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
2308 credits_received
= le16_to_cpu(rsp
->hdr
.sync_hdr
.CreditRequest
);
2310 DeleteMidQEntry(mid
);
2311 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
2314 void smb2_reconnect_server(struct work_struct
*work
)
2316 struct TCP_Server_Info
*server
= container_of(work
,
2317 struct TCP_Server_Info
, reconnect
.work
);
2318 struct cifs_ses
*ses
;
2319 struct cifs_tcon
*tcon
, *tcon2
;
2320 struct list_head tmp_list
;
2321 int tcon_exist
= false;
2323 int resched
= false;
2326 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2327 mutex_lock(&server
->reconnect_mutex
);
2329 INIT_LIST_HEAD(&tmp_list
);
2330 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
2332 spin_lock(&cifs_tcp_ses_lock
);
2333 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
2334 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
2335 if (tcon
->need_reconnect
|| tcon
->need_reopen_files
) {
2337 list_add_tail(&tcon
->rlist
, &tmp_list
);
2343 * Get the reference to server struct to be sure that the last call of
2344 * cifs_put_tcon() in the loop below won't release the server pointer.
2347 server
->srv_count
++;
2349 spin_unlock(&cifs_tcp_ses_lock
);
2351 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
2352 rc
= smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
);
2354 cifs_reopen_persistent_handles(tcon
);
2357 list_del_init(&tcon
->rlist
);
2358 cifs_put_tcon(tcon
);
2361 cifs_dbg(FYI
, "Reconnecting tcons finished\n");
2363 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 2 * HZ
);
2364 mutex_unlock(&server
->reconnect_mutex
);
2366 /* now we can safely release srv struct */
2368 cifs_put_tcp_session(server
, 1);
2372 SMB2_echo(struct TCP_Server_Info
*server
)
2374 struct smb2_echo_req
*req
;
2377 struct smb_rqst rqst
= { .rq_iov
= iov
,
2380 cifs_dbg(FYI
, "In echo request\n");
2382 if (server
->tcpStatus
== CifsNeedNegotiate
) {
2383 /* No need to send echo on newly established connections */
2384 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
2388 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
2392 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
2394 /* 4 for rfc1002 length field */
2396 iov
[0].iov_base
= (char *)req
;
2397 iov
[1].iov_len
= get_rfc1002_length(req
);
2398 iov
[1].iov_base
= (char *)req
+ 4;
2400 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, NULL
,
2401 server
, CIFS_ECHO_OP
);
2403 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
2405 cifs_small_buf_release(req
);
2410 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2413 struct smb2_flush_req
*req
;
2414 struct cifs_ses
*ses
= tcon
->ses
;
2416 struct kvec rsp_iov
;
2421 cifs_dbg(FYI
, "Flush\n");
2423 if (!ses
|| !(ses
->server
))
2426 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
2430 if (encryption_required(tcon
))
2431 flags
|= CIFS_TRANSFORM_REQ
;
2433 req
->PersistentFileId
= persistent_fid
;
2434 req
->VolatileFileId
= volatile_fid
;
2436 iov
[0].iov_base
= (char *)req
;
2437 /* 4 for rfc1002 length field */
2438 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2440 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2441 cifs_small_buf_release(req
);
2444 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
2446 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2451 * To form a chain of read requests, any read requests after the first should
2452 * have the end_of_chain boolean set to true.
2455 smb2_new_read_req(void **buf
, unsigned int *total_len
,
2456 struct cifs_io_parms
*io_parms
, unsigned int remaining_bytes
,
2460 struct smb2_read_plain_req
*req
= NULL
;
2461 struct smb2_sync_hdr
*shdr
;
2463 rc
= smb2_plain_req_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
,
2467 if (io_parms
->tcon
->ses
->server
== NULL
)
2468 return -ECONNABORTED
;
2470 shdr
= &req
->sync_hdr
;
2471 shdr
->ProcessId
= cpu_to_le32(io_parms
->pid
);
2473 req
->PersistentFileId
= io_parms
->persistent_fid
;
2474 req
->VolatileFileId
= io_parms
->volatile_fid
;
2475 req
->ReadChannelInfoOffset
= 0; /* reserved */
2476 req
->ReadChannelInfoLength
= 0; /* reserved */
2477 req
->Channel
= 0; /* reserved */
2478 req
->MinimumCount
= 0;
2479 req
->Length
= cpu_to_le32(io_parms
->length
);
2480 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2482 if (request_type
& CHAINED_REQUEST
) {
2483 if (!(request_type
& END_OF_CHAIN
)) {
2484 /* next 8-byte aligned request */
2485 *total_len
= DIV_ROUND_UP(*total_len
, 8) * 8;
2486 shdr
->NextCommand
= cpu_to_le32(*total_len
);
2487 } else /* END_OF_CHAIN */
2488 shdr
->NextCommand
= 0;
2489 if (request_type
& RELATED_REQUEST
) {
2490 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
2492 * Related requests use info from previous read request
2495 shdr
->SessionId
= 0xFFFFFFFF;
2496 shdr
->TreeId
= 0xFFFFFFFF;
2497 req
->PersistentFileId
= 0xFFFFFFFF;
2498 req
->VolatileFileId
= 0xFFFFFFFF;
2501 if (remaining_bytes
> io_parms
->length
)
2502 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
2504 req
->RemainingBytes
= 0;
2511 smb2_readv_callback(struct mid_q_entry
*mid
)
2513 struct cifs_readdata
*rdata
= mid
->callback_data
;
2514 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2515 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2516 struct smb2_sync_hdr
*shdr
=
2517 (struct smb2_sync_hdr
*)rdata
->iov
[1].iov_base
;
2518 unsigned int credits_received
= 1;
2519 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2521 .rq_pages
= rdata
->pages
,
2522 .rq_npages
= rdata
->nr_pages
,
2523 .rq_pagesz
= rdata
->pagesz
,
2524 .rq_tailsz
= rdata
->tailsz
};
2526 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2527 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
2530 switch (mid
->mid_state
) {
2531 case MID_RESPONSE_RECEIVED
:
2532 credits_received
= le16_to_cpu(shdr
->CreditRequest
);
2533 /* result already set, check signature */
2534 if (server
->sign
&& !mid
->decrypted
) {
2537 rc
= smb2_verify_signature(&rqst
, server
);
2539 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
2542 /* FIXME: should this be counted toward the initiating task? */
2543 task_io_account_read(rdata
->got_bytes
);
2544 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2546 case MID_REQUEST_SUBMITTED
:
2547 case MID_RETRY_NEEDED
:
2548 rdata
->result
= -EAGAIN
;
2549 if (server
->sign
&& rdata
->got_bytes
)
2550 /* reset bytes number since we can not check a sign */
2551 rdata
->got_bytes
= 0;
2552 /* FIXME: should this be counted toward the initiating task? */
2553 task_io_account_read(rdata
->got_bytes
);
2554 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2557 if (rdata
->result
!= -ENODATA
)
2558 rdata
->result
= -EIO
;
2562 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
2564 queue_work(cifsiod_wq
, &rdata
->work
);
2565 DeleteMidQEntry(mid
);
2566 add_credits(server
, credits_received
, 0);
2569 /* smb2_async_readv - send an async read, and set up mid to handle result */
2571 smb2_async_readv(struct cifs_readdata
*rdata
)
2575 struct smb2_sync_hdr
*shdr
;
2576 struct cifs_io_parms io_parms
;
2577 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2579 struct TCP_Server_Info
*server
;
2580 unsigned int total_len
;
2583 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
2584 __func__
, rdata
->offset
, rdata
->bytes
);
2586 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2587 io_parms
.offset
= rdata
->offset
;
2588 io_parms
.length
= rdata
->bytes
;
2589 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
2590 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
2591 io_parms
.pid
= rdata
->pid
;
2593 server
= io_parms
.tcon
->ses
->server
;
2595 rc
= smb2_new_read_req((void **) &buf
, &total_len
, &io_parms
, 0, 0);
2597 if (rc
== -EAGAIN
&& rdata
->credits
) {
2598 /* credits was reset by reconnect */
2600 /* reduce in_flight value since we won't send the req */
2601 spin_lock(&server
->req_lock
);
2602 server
->in_flight
--;
2603 spin_unlock(&server
->req_lock
);
2608 if (encryption_required(io_parms
.tcon
))
2609 flags
|= CIFS_TRANSFORM_REQ
;
2611 req_len
= cpu_to_be32(total_len
);
2613 rdata
->iov
[0].iov_base
= &req_len
;
2614 rdata
->iov
[0].iov_len
= sizeof(__be32
);
2615 rdata
->iov
[1].iov_base
= buf
;
2616 rdata
->iov
[1].iov_len
= total_len
;
2618 shdr
= (struct smb2_sync_hdr
*)buf
;
2620 if (rdata
->credits
) {
2621 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
2622 SMB2_MAX_BUFFER_SIZE
));
2623 shdr
->CreditRequest
= shdr
->CreditCharge
;
2624 spin_lock(&server
->req_lock
);
2625 server
->credits
+= rdata
->credits
-
2626 le16_to_cpu(shdr
->CreditCharge
);
2627 spin_unlock(&server
->req_lock
);
2628 wake_up(&server
->request_q
);
2629 flags
|= CIFS_HAS_CREDITS
;
2632 kref_get(&rdata
->refcount
);
2633 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
2634 cifs_readv_receive
, smb2_readv_callback
,
2635 smb3_handle_read_data
, rdata
, flags
);
2637 kref_put(&rdata
->refcount
, cifs_readdata_release
);
2638 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
2641 cifs_small_buf_release(buf
);
2646 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2647 unsigned int *nbytes
, char **buf
, int *buf_type
)
2649 int resp_buftype
, rc
= -EACCES
;
2650 struct smb2_read_plain_req
*req
= NULL
;
2651 struct smb2_read_rsp
*rsp
= NULL
;
2652 struct smb2_sync_hdr
*shdr
;
2654 struct kvec rsp_iov
;
2655 unsigned int total_len
;
2657 struct smb_rqst rqst
= { .rq_iov
= iov
,
2659 int flags
= CIFS_LOG_ERROR
;
2660 struct cifs_ses
*ses
= io_parms
->tcon
->ses
;
2663 rc
= smb2_new_read_req((void **)&req
, &total_len
, io_parms
, 0, 0);
2667 if (encryption_required(io_parms
->tcon
))
2668 flags
|= CIFS_TRANSFORM_REQ
;
2670 req_len
= cpu_to_be32(total_len
);
2672 iov
[0].iov_base
= &req_len
;
2673 iov
[0].iov_len
= sizeof(__be32
);
2674 iov
[1].iov_base
= req
;
2675 iov
[1].iov_len
= total_len
;
2677 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2678 cifs_small_buf_release(req
);
2680 rsp
= (struct smb2_read_rsp
*)rsp_iov
.iov_base
;
2681 shdr
= get_sync_hdr(rsp
);
2683 if (shdr
->Status
== STATUS_END_OF_FILE
) {
2684 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2689 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
2690 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
2692 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2693 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
2694 (*nbytes
> io_parms
->length
)) {
2695 cifs_dbg(FYI
, "bad length %d for count %d\n",
2696 *nbytes
, io_parms
->length
);
2703 memcpy(*buf
, (char *)shdr
+ rsp
->DataOffset
, *nbytes
);
2704 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2705 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
2706 *buf
= rsp_iov
.iov_base
;
2707 if (resp_buftype
== CIFS_SMALL_BUFFER
)
2708 *buf_type
= CIFS_SMALL_BUFFER
;
2709 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
2710 *buf_type
= CIFS_LARGE_BUFFER
;
2716 * Check the mid_state and signature on received buffer (if any), and queue the
2717 * workqueue completion task.
2720 smb2_writev_callback(struct mid_q_entry
*mid
)
2722 struct cifs_writedata
*wdata
= mid
->callback_data
;
2723 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2724 unsigned int written
;
2725 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
2726 unsigned int credits_received
= 1;
2728 switch (mid
->mid_state
) {
2729 case MID_RESPONSE_RECEIVED
:
2730 credits_received
= le16_to_cpu(rsp
->hdr
.sync_hdr
.CreditRequest
);
2731 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
2732 if (wdata
->result
!= 0)
2735 written
= le32_to_cpu(rsp
->DataLength
);
2737 * Mask off high 16 bits when bytes written as returned
2738 * by the server is greater than bytes requested by the
2739 * client. OS/2 servers are known to set incorrect
2742 if (written
> wdata
->bytes
)
2745 if (written
< wdata
->bytes
)
2746 wdata
->result
= -ENOSPC
;
2748 wdata
->bytes
= written
;
2750 case MID_REQUEST_SUBMITTED
:
2751 case MID_RETRY_NEEDED
:
2752 wdata
->result
= -EAGAIN
;
2755 wdata
->result
= -EIO
;
2760 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2762 queue_work(cifsiod_wq
, &wdata
->work
);
2763 DeleteMidQEntry(mid
);
2764 add_credits(tcon
->ses
->server
, credits_received
, 0);
2767 /* smb2_async_writev - send an async write, and set up mid to handle result */
2769 smb2_async_writev(struct cifs_writedata
*wdata
,
2770 void (*release
)(struct kref
*kref
))
2772 int rc
= -EACCES
, flags
= 0;
2773 struct smb2_write_req
*req
= NULL
;
2774 struct smb2_sync_hdr
*shdr
;
2775 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2776 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2778 struct smb_rqst rqst
= { };
2780 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
2782 if (rc
== -EAGAIN
&& wdata
->credits
) {
2783 /* credits was reset by reconnect */
2785 /* reduce in_flight value since we won't send the req */
2786 spin_lock(&server
->req_lock
);
2787 server
->in_flight
--;
2788 spin_unlock(&server
->req_lock
);
2790 goto async_writev_out
;
2793 if (encryption_required(tcon
))
2794 flags
|= CIFS_TRANSFORM_REQ
;
2796 shdr
= get_sync_hdr(req
);
2797 shdr
->ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
2799 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
2800 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
2801 req
->WriteChannelInfoOffset
= 0;
2802 req
->WriteChannelInfoLength
= 0;
2804 req
->Offset
= cpu_to_le64(wdata
->offset
);
2805 /* 4 for rfc1002 length field */
2806 req
->DataOffset
= cpu_to_le16(
2807 offsetof(struct smb2_write_req
, Buffer
) - 4);
2808 req
->RemainingBytes
= 0;
2810 /* 4 for rfc1002 length field and 1 for Buffer */
2812 iov
[0].iov_base
= req
;
2813 iov
[1].iov_len
= get_rfc1002_length(req
) - 1;
2814 iov
[1].iov_base
= (char *)req
+ 4;
2818 rqst
.rq_pages
= wdata
->pages
;
2819 rqst
.rq_npages
= wdata
->nr_pages
;
2820 rqst
.rq_pagesz
= wdata
->pagesz
;
2821 rqst
.rq_tailsz
= wdata
->tailsz
;
2823 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
2824 wdata
->offset
, wdata
->bytes
);
2826 req
->Length
= cpu_to_le32(wdata
->bytes
);
2828 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
2830 if (wdata
->credits
) {
2831 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
2832 SMB2_MAX_BUFFER_SIZE
));
2833 shdr
->CreditRequest
= shdr
->CreditCharge
;
2834 spin_lock(&server
->req_lock
);
2835 server
->credits
+= wdata
->credits
-
2836 le16_to_cpu(shdr
->CreditCharge
);
2837 spin_unlock(&server
->req_lock
);
2838 wake_up(&server
->request_q
);
2839 flags
|= CIFS_HAS_CREDITS
;
2842 kref_get(&wdata
->refcount
);
2843 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, NULL
,
2847 kref_put(&wdata
->refcount
, release
);
2848 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2852 cifs_small_buf_release(req
);
2857 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2858 * The length field from io_parms must be at least 1 and indicates a number of
2859 * elements with data to write that begins with position 1 in iov array. All
2860 * data length is specified by count.
2863 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2864 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
2867 struct smb2_write_req
*req
= NULL
;
2868 struct smb2_write_rsp
*rsp
= NULL
;
2870 struct kvec rsp_iov
;
2878 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
2882 if (io_parms
->tcon
->ses
->server
== NULL
)
2883 return -ECONNABORTED
;
2885 if (encryption_required(io_parms
->tcon
))
2886 flags
|= CIFS_TRANSFORM_REQ
;
2888 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
2890 req
->PersistentFileId
= io_parms
->persistent_fid
;
2891 req
->VolatileFileId
= io_parms
->volatile_fid
;
2892 req
->WriteChannelInfoOffset
= 0;
2893 req
->WriteChannelInfoLength
= 0;
2895 req
->Length
= cpu_to_le32(io_parms
->length
);
2896 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2897 /* 4 for rfc1002 length field */
2898 req
->DataOffset
= cpu_to_le16(
2899 offsetof(struct smb2_write_req
, Buffer
) - 4);
2900 req
->RemainingBytes
= 0;
2902 iov
[0].iov_base
= (char *)req
;
2903 /* 4 for rfc1002 length field and 1 for Buffer */
2904 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2906 /* length of entire message including data to be written */
2907 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
2909 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
2910 &resp_buftype
, flags
, &rsp_iov
);
2911 cifs_small_buf_release(req
);
2912 rsp
= (struct smb2_write_rsp
*)rsp_iov
.iov_base
;
2915 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
2916 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
2918 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2920 free_rsp_buf(resp_buftype
, rsp
);
2925 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
2928 unsigned int entrycount
= 0;
2929 unsigned int next_offset
= 0;
2930 FILE_DIRECTORY_INFO
*entryptr
;
2932 if (bufstart
== NULL
)
2935 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
2938 entryptr
= (FILE_DIRECTORY_INFO
*)
2939 ((char *)entryptr
+ next_offset
);
2941 if ((char *)entryptr
+ size
> end_of_buf
) {
2942 cifs_dbg(VFS
, "malformed search entry would overflow\n");
2946 len
= le32_to_cpu(entryptr
->FileNameLength
);
2947 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
2948 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
2953 *lastentry
= (char *)entryptr
;
2956 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
2968 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
2969 u64 persistent_fid
, u64 volatile_fid
, int index
,
2970 struct cifs_search_info
*srch_inf
)
2972 struct smb2_query_directory_req
*req
;
2973 struct smb2_query_directory_rsp
*rsp
= NULL
;
2975 struct kvec rsp_iov
;
2978 int resp_buftype
= CIFS_NO_BUFFER
;
2979 unsigned char *bufptr
;
2980 struct TCP_Server_Info
*server
;
2981 struct cifs_ses
*ses
= tcon
->ses
;
2982 __le16 asteriks
= cpu_to_le16('*');
2984 unsigned int output_size
= CIFSMaxBufSize
;
2985 size_t info_buf_size
;
2988 if (ses
&& (ses
->server
))
2989 server
= ses
->server
;
2993 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
2997 if (encryption_required(tcon
))
2998 flags
|= CIFS_TRANSFORM_REQ
;
3000 switch (srch_inf
->info_level
) {
3001 case SMB_FIND_FILE_DIRECTORY_INFO
:
3002 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
3003 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
3005 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
3006 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
3007 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
3010 cifs_dbg(VFS
, "info level %u isn't supported\n",
3011 srch_inf
->info_level
);
3016 req
->FileIndex
= cpu_to_le32(index
);
3017 req
->PersistentFileId
= persistent_fid
;
3018 req
->VolatileFileId
= volatile_fid
;
3021 bufptr
= req
->Buffer
;
3022 memcpy(bufptr
, &asteriks
, len
);
3024 req
->FileNameOffset
=
3025 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
3026 req
->FileNameLength
= cpu_to_le16(len
);
3028 * BB could be 30 bytes or so longer if we used SMB2 specific
3029 * buffer lengths, but this is safe and close enough.
3031 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
3032 output_size
= min_t(unsigned int, output_size
, 2 << 15);
3033 req
->OutputBufferLength
= cpu_to_le32(output_size
);
3035 iov
[0].iov_base
= (char *)req
;
3036 /* 4 for RFC1001 length and 1 for Buffer */
3037 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
3039 iov
[1].iov_base
= (char *)(req
->Buffer
);
3040 iov
[1].iov_len
= len
;
3042 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
3044 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, flags
, &rsp_iov
);
3045 cifs_small_buf_release(req
);
3046 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
.iov_base
;
3049 if (rc
== -ENODATA
&&
3050 rsp
->hdr
.sync_hdr
.Status
== STATUS_NO_MORE_FILES
) {
3051 srch_inf
->endOfSearch
= true;
3054 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
3058 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
3059 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
3064 srch_inf
->unicode
= true;
3066 if (srch_inf
->ntwrk_buf_start
) {
3067 if (srch_inf
->smallBuf
)
3068 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
3070 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
3072 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
3073 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
3074 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
3075 /* 4 for rfc1002 length field */
3076 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
3077 srch_inf
->entries_in_buffer
=
3078 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
3079 &srch_inf
->last_entry
, info_buf_size
);
3080 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
3081 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
3082 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
3083 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
3084 if (resp_buftype
== CIFS_LARGE_BUFFER
)
3085 srch_inf
->smallBuf
= false;
3086 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
3087 srch_inf
->smallBuf
= true;
3089 cifs_dbg(VFS
, "illegal search buffer type\n");
3094 free_rsp_buf(resp_buftype
, rsp
);
3099 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3100 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, u8 info_class
,
3101 u8 info_type
, u32 additional_info
, unsigned int num
,
3102 void **data
, unsigned int *size
)
3104 struct smb2_set_info_req
*req
;
3105 struct smb2_set_info_rsp
*rsp
= NULL
;
3107 struct kvec rsp_iov
;
3111 struct cifs_ses
*ses
= tcon
->ses
;
3114 if (!ses
|| !(ses
->server
))
3120 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
3124 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
3130 if (encryption_required(tcon
))
3131 flags
|= CIFS_TRANSFORM_REQ
;
3133 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3135 req
->InfoType
= info_type
;
3136 req
->FileInfoClass
= info_class
;
3137 req
->PersistentFileId
= persistent_fid
;
3138 req
->VolatileFileId
= volatile_fid
;
3139 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
3141 /* 4 for RFC1001 length and 1 for Buffer */
3143 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
3144 req
->BufferLength
= cpu_to_le32(*size
);
3146 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
3148 memcpy(req
->Buffer
, *data
, *size
);
3150 iov
[0].iov_base
= (char *)req
;
3151 /* 4 for RFC1001 length */
3152 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
3154 for (i
= 1; i
< num
; i
++) {
3155 inc_rfc1001_len(req
, size
[i
]);
3156 le32_add_cpu(&req
->BufferLength
, size
[i
]);
3157 iov
[i
].iov_base
= (char *)data
[i
];
3158 iov
[i
].iov_len
= size
[i
];
3161 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, flags
, &rsp_iov
);
3162 cifs_small_buf_release(req
);
3163 rsp
= (struct smb2_set_info_rsp
*)rsp_iov
.iov_base
;
3166 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
3168 free_rsp_buf(resp_buftype
, rsp
);
3174 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
3175 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3177 struct smb2_file_rename_info info
;
3179 unsigned int size
[2];
3181 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3183 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
3187 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
3188 /* 0 = fail if target already exists */
3189 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3190 info
.FileNameLength
= cpu_to_le32(len
);
3193 size
[0] = sizeof(struct smb2_file_rename_info
);
3195 data
[1] = target_file
;
3196 size
[1] = len
+ 2 /* null */;
3198 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3199 current
->tgid
, FILE_RENAME_INFORMATION
, SMB2_O_INFO_FILE
,
3206 SMB2_rmdir(const unsigned int xid
, struct cifs_tcon
*tcon
,
3207 u64 persistent_fid
, u64 volatile_fid
)
3209 __u8 delete_pending
= 1;
3213 data
= &delete_pending
;
3214 size
= 1; /* sizeof __u8 */
3216 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3217 current
->tgid
, FILE_DISPOSITION_INFORMATION
, SMB2_O_INFO_FILE
,
3218 0, 1, &data
, &size
);
3222 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
3223 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3225 struct smb2_file_link_info info
;
3227 unsigned int size
[2];
3229 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3231 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
3235 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
3236 /* 0 = fail if link already exists */
3237 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3238 info
.FileNameLength
= cpu_to_le32(len
);
3241 size
[0] = sizeof(struct smb2_file_link_info
);
3243 data
[1] = target_file
;
3244 size
[1] = len
+ 2 /* null */;
3246 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3247 current
->tgid
, FILE_LINK_INFORMATION
, SMB2_O_INFO_FILE
,
3254 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3255 u64 volatile_fid
, u32 pid
, __le64
*eof
, bool is_falloc
)
3257 struct smb2_file_eof_info info
;
3261 info
.EndOfFile
= *eof
;
3264 size
= sizeof(struct smb2_file_eof_info
);
3267 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3268 pid
, FILE_ALLOCATION_INFORMATION
, SMB2_O_INFO_FILE
,
3269 0, 1, &data
, &size
);
3271 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3272 pid
, FILE_END_OF_FILE_INFORMATION
, SMB2_O_INFO_FILE
,
3273 0, 1, &data
, &size
);
3277 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3278 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
3281 size
= sizeof(FILE_BASIC_INFO
);
3282 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3283 current
->tgid
, FILE_BASIC_INFORMATION
, SMB2_O_INFO_FILE
,
3284 0, 1, (void **)&buf
, &size
);
3288 SMB2_set_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
3289 u64 persistent_fid
, u64 volatile_fid
,
3290 struct cifs_ntsd
*pnntsd
, int pacllen
, int aclflag
)
3292 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3293 current
->tgid
, 0, SMB2_O_INFO_SECURITY
, aclflag
,
3294 1, (void **)&pnntsd
, &pacllen
);
3298 SMB2_set_ea(const unsigned int xid
, struct cifs_tcon
*tcon
,
3299 u64 persistent_fid
, u64 volatile_fid
,
3300 struct smb2_file_full_ea_info
*buf
, int len
)
3302 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3303 current
->tgid
, FILE_FULL_EA_INFORMATION
, SMB2_O_INFO_FILE
,
3304 0, 1, (void **)&buf
, &len
);
3308 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3309 const u64 persistent_fid
, const u64 volatile_fid
,
3313 struct smb2_oplock_break
*req
= NULL
;
3314 int flags
= CIFS_OBREAK_OP
;
3316 cifs_dbg(FYI
, "SMB2_oplock_break\n");
3317 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
3321 if (encryption_required(tcon
))
3322 flags
|= CIFS_TRANSFORM_REQ
;
3324 req
->VolatileFid
= volatile_fid
;
3325 req
->PersistentFid
= persistent_fid
;
3326 req
->OplockLevel
= oplock_level
;
3327 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
3329 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, flags
);
3330 cifs_small_buf_release(req
);
3333 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3334 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
3341 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
3342 struct kstatfs
*kst
)
3344 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
3345 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
3346 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
3347 kst
->f_bfree
= kst
->f_bavail
=
3348 le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
3353 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
3354 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
3357 struct smb2_query_info_req
*req
;
3359 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
3361 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
3364 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
3368 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
3369 req
->FileInfoClass
= level
;
3370 req
->PersistentFileId
= persistent_fid
;
3371 req
->VolatileFileId
= volatile_fid
;
3372 /* 4 for rfc1002 length field and 1 for pad */
3373 req
->InputBufferOffset
=
3374 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
3375 req
->OutputBufferLength
= cpu_to_le32(
3376 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
3378 iov
->iov_base
= (char *)req
;
3379 /* 4 for rfc1002 length field */
3380 iov
->iov_len
= get_rfc1002_length(req
) + 4;
3385 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3386 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
3388 struct smb2_query_info_rsp
*rsp
= NULL
;
3390 struct kvec rsp_iov
;
3393 struct cifs_ses
*ses
= tcon
->ses
;
3394 struct smb2_fs_full_size_info
*info
= NULL
;
3397 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
3398 sizeof(struct smb2_fs_full_size_info
),
3399 persistent_fid
, volatile_fid
);
3403 if (encryption_required(tcon
))
3404 flags
|= CIFS_TRANSFORM_REQ
;
3406 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
3407 cifs_small_buf_release(iov
.iov_base
);
3409 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3412 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3414 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
3415 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
3416 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
3417 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
3418 sizeof(struct smb2_fs_full_size_info
));
3420 copy_fs_info_to_kstatfs(info
, fsdata
);
3423 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3428 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
3429 u64 persistent_fid
, u64 volatile_fid
, int level
)
3431 struct smb2_query_info_rsp
*rsp
= NULL
;
3433 struct kvec rsp_iov
;
3435 int resp_buftype
, max_len
, min_len
;
3436 struct cifs_ses
*ses
= tcon
->ses
;
3437 unsigned int rsp_len
, offset
;
3440 if (level
== FS_DEVICE_INFORMATION
) {
3441 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3442 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3443 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
3444 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
3445 min_len
= MIN_FS_ATTR_INFO_SIZE
;
3446 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3447 max_len
= sizeof(struct smb3_fs_ss_info
);
3448 min_len
= sizeof(struct smb3_fs_ss_info
);
3450 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
3454 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
3455 persistent_fid
, volatile_fid
);
3459 if (encryption_required(tcon
))
3460 flags
|= CIFS_TRANSFORM_REQ
;
3462 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
3463 cifs_small_buf_release(iov
.iov_base
);
3465 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3468 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3470 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
3471 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
3472 rc
= validate_buf(offset
, rsp_len
, &rsp
->hdr
, min_len
);
3476 if (level
== FS_ATTRIBUTE_INFORMATION
)
3477 memcpy(&tcon
->fsAttrInfo
, 4 /* RFC1001 len */ + offset
3478 + (char *)&rsp
->hdr
, min_t(unsigned int,
3480 else if (level
== FS_DEVICE_INFORMATION
)
3481 memcpy(&tcon
->fsDevInfo
, 4 /* RFC1001 len */ + offset
3482 + (char *)&rsp
->hdr
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
3483 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3484 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
3485 (4 /* RFC1001 len */ + offset
+ (char *)&rsp
->hdr
);
3486 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
3487 tcon
->perf_sector_size
=
3488 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
3492 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3497 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
3498 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3499 const __u32 num_lock
, struct smb2_lock_element
*buf
)
3502 struct smb2_lock_req
*req
= NULL
;
3504 struct kvec rsp_iov
;
3507 int flags
= CIFS_NO_RESP
;
3509 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
3511 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
3515 if (encryption_required(tcon
))
3516 flags
|= CIFS_TRANSFORM_REQ
;
3518 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3519 req
->LockCount
= cpu_to_le16(num_lock
);
3521 req
->PersistentFileId
= persist_fid
;
3522 req
->VolatileFileId
= volatile_fid
;
3524 count
= num_lock
* sizeof(struct smb2_lock_element
);
3525 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
3527 iov
[0].iov_base
= (char *)req
;
3528 /* 4 for rfc1002 length field and count for all locks */
3529 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
3530 iov
[1].iov_base
= (char *)buf
;
3531 iov
[1].iov_len
= count
;
3533 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
3534 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, flags
,
3536 cifs_small_buf_release(req
);
3538 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
3539 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
3546 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
3547 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3548 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
3551 struct smb2_lock_element lock
;
3553 lock
.Offset
= cpu_to_le64(offset
);
3554 lock
.Length
= cpu_to_le64(length
);
3555 lock
.Flags
= cpu_to_le32(lock_flags
);
3556 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
3557 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
3559 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
3563 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3564 __u8
*lease_key
, const __le32 lease_state
)
3567 struct smb2_lease_ack
*req
= NULL
;
3568 int flags
= CIFS_OBREAK_OP
;
3570 cifs_dbg(FYI
, "SMB2_lease_break\n");
3571 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
3575 if (encryption_required(tcon
))
3576 flags
|= CIFS_TRANSFORM_REQ
;
3578 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
3579 req
->StructureSize
= cpu_to_le16(36);
3580 inc_rfc1001_len(req
, 12);
3582 memcpy(req
->LeaseKey
, lease_key
, 16);
3583 req
->LeaseState
= lease_state
;
3585 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, flags
);
3586 cifs_small_buf_release(req
);
3589 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3590 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);