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
);
241 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
242 if (!rc
&& tcon
->ses
->need_reconnect
)
243 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
245 if (rc
|| !tcon
->need_reconnect
) {
246 mutex_unlock(&tcon
->ses
->session_mutex
);
250 cifs_mark_open_files_invalid(tcon
);
251 if (tcon
->use_persistent
)
252 tcon
->need_reopen_files
= true;
254 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
255 mutex_unlock(&tcon
->ses
->session_mutex
);
257 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
261 if (smb2_command
!= SMB2_INTERNAL_CMD
)
262 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
264 atomic_inc(&tconInfoReconnectCount
);
267 * Check if handle based operation so we know whether we can continue
268 * or not without returning to caller to reset file handle.
271 * BB Is flush done by server on drop of tcp session? Should we special
272 * case it and skip above?
274 switch (smb2_command
) {
280 case SMB2_QUERY_DIRECTORY
:
281 case SMB2_CHANGE_NOTIFY
:
282 case SMB2_QUERY_INFO
:
286 unload_nls(nls_codepage
);
291 fill_small_buf(__le16 smb2_command
, struct cifs_tcon
*tcon
, void *buf
,
292 unsigned int *total_len
)
294 struct smb2_sync_pdu
*spdu
= (struct smb2_sync_pdu
*)buf
;
295 /* lookup word count ie StructureSize from table */
296 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_command
)];
299 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
300 * largest operations (Create)
304 smb2_hdr_assemble(&spdu
->sync_hdr
, smb2_command
, tcon
);
305 spdu
->StructureSize2
= cpu_to_le16(parmsize
);
307 *total_len
= parmsize
+ sizeof(struct smb2_sync_hdr
);
310 /* init request without RFC1001 length at the beginning */
312 smb2_plain_req_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
313 void **request_buf
, unsigned int *total_len
)
316 struct smb2_sync_hdr
*shdr
;
318 rc
= smb2_reconnect(smb2_command
, tcon
);
322 /* BB eventually switch this to SMB2 specific small buf size */
323 *request_buf
= cifs_small_buf_get();
324 if (*request_buf
== NULL
) {
325 /* BB should we add a retry in here if not a writepage? */
329 shdr
= (struct smb2_sync_hdr
*)(*request_buf
);
331 fill_small_buf(smb2_command
, tcon
, shdr
, total_len
);
334 #ifdef CONFIG_CIFS_STATS2
335 uint16_t com_code
= le16_to_cpu(smb2_command
);
337 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
339 cifs_stats_inc(&tcon
->num_smbs_sent
);
346 * Allocate and return pointer to an SMB request hdr, and set basic
347 * SMB information in the SMB header. If the return code is zero, this
348 * function must have filled in request_buf pointer. The returned buffer
349 * has RFC1001 length at the beginning.
352 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
356 unsigned int total_len
;
357 struct smb2_pdu
*pdu
;
359 rc
= smb2_reconnect(smb2_command
, tcon
);
363 /* BB eventually switch this to SMB2 specific small buf size */
364 *request_buf
= cifs_small_buf_get();
365 if (*request_buf
== NULL
) {
366 /* BB should we add a retry in here if not a writepage? */
370 pdu
= (struct smb2_pdu
*)(*request_buf
);
372 fill_small_buf(smb2_command
, tcon
, get_sync_hdr(pdu
), &total_len
);
374 /* Note this is only network field converted to big endian */
375 pdu
->hdr
.smb2_buf_length
= cpu_to_be32(total_len
);
378 #ifdef CONFIG_CIFS_STATS2
379 uint16_t com_code
= le16_to_cpu(smb2_command
);
380 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
382 cifs_stats_inc(&tcon
->num_smbs_sent
);
388 #ifdef CONFIG_CIFS_SMB311
389 /* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
390 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
393 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
394 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
397 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
399 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
400 pneg_ctxt
->DataLength
= cpu_to_le16(38);
401 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
402 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
403 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
404 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
408 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
410 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
411 pneg_ctxt
->DataLength
= cpu_to_le16(6);
412 pneg_ctxt
->CipherCount
= cpu_to_le16(2);
413 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_GCM
;
414 pneg_ctxt
->Ciphers
[1] = SMB2_ENCRYPTION_AES128_CCM
;
418 assemble_neg_contexts(struct smb2_negotiate_req
*req
)
421 /* +4 is to account for the RFC1001 len field */
422 char *pneg_ctxt
= (char *)req
+ OFFSET_OF_NEG_CONTEXT
+ 4;
424 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
425 /* Add 2 to size to round to 8 byte boundary */
426 pneg_ctxt
+= 2 + sizeof(struct smb2_preauth_neg_context
);
427 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
428 req
->NegotiateContextOffset
= cpu_to_le32(OFFSET_OF_NEG_CONTEXT
);
429 req
->NegotiateContextCount
= cpu_to_le16(2);
430 inc_rfc1001_len(req
, 4 + sizeof(struct smb2_preauth_neg_context
)
431 + sizeof(struct smb2_encryption_neg_context
)); /* calculate hash */
434 static void assemble_neg_contexts(struct smb2_negotiate_req
*req
)
442 * SMB2 Worker functions follow:
444 * The general structure of the worker functions is:
445 * 1) Call smb2_init (assembles SMB2 header)
446 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
447 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
448 * 4) Decode SMB2 command specific fields in the fixed length area
449 * 5) Decode variable length data area (if any for this SMB2 command type)
450 * 6) Call free smb buffer
456 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
458 struct smb2_negotiate_req
*req
;
459 struct smb2_negotiate_rsp
*rsp
;
464 struct TCP_Server_Info
*server
= ses
->server
;
465 int blob_offset
, blob_length
;
467 int flags
= CIFS_NEG_OP
;
469 cifs_dbg(FYI
, "Negotiate protocol\n");
472 WARN(1, "%s: server is NULL!\n", __func__
);
476 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
480 req
->hdr
.sync_hdr
.SessionId
= 0;
482 if (strcmp(ses
->server
->vals
->version_string
,
483 SMB3ANY_VERSION_STRING
) == 0) {
484 req
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
485 req
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
486 req
->DialectCount
= cpu_to_le16(2);
487 inc_rfc1001_len(req
, 4);
488 } else if (strcmp(ses
->server
->vals
->version_string
,
489 SMBDEFAULT_VERSION_STRING
) == 0) {
490 req
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
491 req
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
492 req
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
493 req
->DialectCount
= cpu_to_le16(3);
494 inc_rfc1001_len(req
, 6);
496 /* otherwise send specific dialect */
497 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
498 req
->DialectCount
= cpu_to_le16(1);
499 inc_rfc1001_len(req
, 2);
502 /* only one of SMB2 signing flags may be set in SMB2 request */
504 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
505 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
506 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
508 req
->SecurityMode
= 0;
510 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
512 /* ClientGUID must be zero for SMB2.02 dialect */
513 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
514 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
516 memcpy(req
->ClientGUID
, server
->client_guid
,
517 SMB2_CLIENT_GUID_SIZE
);
518 if (ses
->server
->vals
->protocol_id
== SMB311_PROT_ID
)
519 assemble_neg_contexts(req
);
521 iov
[0].iov_base
= (char *)req
;
522 /* 4 for rfc1002 length field */
523 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
525 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
526 cifs_small_buf_release(req
);
527 rsp
= (struct smb2_negotiate_rsp
*)rsp_iov
.iov_base
;
529 * No tcon so can't do
530 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
532 if (rc
== -EOPNOTSUPP
) {
533 cifs_dbg(VFS
, "Dialect not supported by server. Consider "
534 "specifying vers=1.0 or vers=2.0 on mount for accessing"
540 if (strcmp(ses
->server
->vals
->version_string
,
541 SMB3ANY_VERSION_STRING
) == 0) {
542 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
544 "SMB2 dialect returned but not requested\n");
546 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
548 "SMB2.1 dialect returned but not requested\n");
551 } else if (strcmp(ses
->server
->vals
->version_string
,
552 SMBDEFAULT_VERSION_STRING
) == 0) {
553 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
555 "SMB2 dialect returned but not requested\n");
557 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
558 /* ops set to 3.0 by default for default so update */
559 ses
->server
->ops
= &smb21_operations
;
561 } else if (le16_to_cpu(rsp
->DialectRevision
) !=
562 ses
->server
->vals
->protocol_id
) {
563 /* if requested single dialect ensure returned dialect matched */
564 cifs_dbg(VFS
, "Illegal 0x%x dialect returned: not requested\n",
565 le16_to_cpu(rsp
->DialectRevision
));
569 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
571 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
572 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
573 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
574 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
575 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
576 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
577 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
578 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
579 #ifdef CONFIG_CIFS_SMB311
580 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
581 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
584 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
585 le16_to_cpu(rsp
->DialectRevision
));
589 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
591 /* BB: add check that dialect was valid given dialect(s) we asked for */
593 /* SMB2 only has an extended negflavor */
594 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
595 /* set it to the maximum buffer size value we can send with 1 credit */
596 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
597 SMB2_MAX_BUFFER_SIZE
);
598 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
599 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
600 /* BB Do we need to validate the SecurityMode? */
601 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
602 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
604 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
606 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
609 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
611 * ses->sectype = RawNTLMSSP;
612 * but for time being this is our only auth choice so doesn't matter.
613 * We just found a server which sets blob length to zero expecting raw.
615 if (blob_length
== 0) {
616 cifs_dbg(FYI
, "missing security blob on negprot\n");
617 server
->sec_ntlmssp
= true;
620 rc
= cifs_enable_signing(server
, ses
->sign
);
624 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
631 free_rsp_buf(resp_buftype
, rsp
);
635 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
638 struct validate_negotiate_info_req vneg_inbuf
;
639 struct validate_negotiate_info_rsp
*pneg_rsp
;
641 u32 inbuflen
; /* max of 4 dialects */
643 cifs_dbg(FYI
, "validate negotiate\n");
646 * validation ioctl must be signed, so no point sending this if we
647 * can not sign it (ie are not known user). Even if signing is not
648 * required (enabled but not negotiated), in those cases we selectively
649 * sign just this, the first and only signed request on a connection.
650 * Having validation of negotiate info helps reduce attack vectors.
652 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
)
653 return 0; /* validation requires signing */
655 if (tcon
->ses
->user_name
== NULL
) {
656 cifs_dbg(FYI
, "Can't validate negotiate: null user mount\n");
657 return 0; /* validation requires signing */
660 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_NULL
)
661 cifs_dbg(VFS
, "Unexpected null user (anonymous) auth flag sent by server\n");
663 vneg_inbuf
.Capabilities
=
664 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
665 memcpy(vneg_inbuf
.Guid
, tcon
->ses
->server
->client_guid
,
666 SMB2_CLIENT_GUID_SIZE
);
669 vneg_inbuf
.SecurityMode
=
670 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
671 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
672 vneg_inbuf
.SecurityMode
=
673 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
675 vneg_inbuf
.SecurityMode
= 0;
678 if (strcmp(tcon
->ses
->server
->vals
->version_string
,
679 SMB3ANY_VERSION_STRING
) == 0) {
680 vneg_inbuf
.Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
681 vneg_inbuf
.Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
682 vneg_inbuf
.DialectCount
= cpu_to_le16(2);
683 /* structure is big enough for 3 dialects, sending only 2 */
684 inbuflen
= sizeof(struct validate_negotiate_info_req
) - 2;
685 } else if (strcmp(tcon
->ses
->server
->vals
->version_string
,
686 SMBDEFAULT_VERSION_STRING
) == 0) {
687 vneg_inbuf
.Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
688 vneg_inbuf
.Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
689 vneg_inbuf
.Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
690 vneg_inbuf
.DialectCount
= cpu_to_le16(3);
691 /* structure is big enough for 3 dialects */
692 inbuflen
= sizeof(struct validate_negotiate_info_req
);
694 /* otherwise specific dialect was requested */
695 vneg_inbuf
.Dialects
[0] =
696 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
697 vneg_inbuf
.DialectCount
= cpu_to_le16(1);
698 /* structure is big enough for 3 dialects, sending only 1 */
699 inbuflen
= sizeof(struct validate_negotiate_info_req
) - 4;
702 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
703 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
705 (char *)&vneg_inbuf
, sizeof(struct validate_negotiate_info_req
),
706 (char **)&pneg_rsp
, &rsplen
);
709 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
713 if (rsplen
!= sizeof(struct validate_negotiate_info_rsp
)) {
714 cifs_dbg(VFS
, "invalid protocol negotiate response size: %d\n",
717 /* relax check since Mac returns max bufsize allowed on ioctl */
718 if (rsplen
> CIFSMaxBufSize
)
722 /* check validate negotiate info response matches what we got earlier */
723 if (pneg_rsp
->Dialect
!=
724 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
))
727 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
730 /* do not validate server guid because not saved at negprot time yet */
732 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
733 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
736 /* validate negotiate successful */
737 cifs_dbg(FYI
, "validate negotiate info successful\n");
741 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
746 smb2_select_sectype(struct TCP_Server_Info
*server
, enum securityEnum requested
)
755 if (server
->sec_ntlmssp
&&
756 (global_secflags
& CIFSSEC_MAY_NTLMSSP
))
758 if ((server
->sec_kerberos
|| server
->sec_mskerberos
) &&
759 (global_secflags
& CIFSSEC_MAY_KRB5
))
767 struct SMB2_sess_data
{
769 struct cifs_ses
*ses
;
770 struct nls_table
*nls_cp
;
771 void (*func
)(struct SMB2_sess_data
*);
773 u64 previous_session
;
775 /* we will send the SMB in three pieces:
776 * a fixed length beginning part, an optional
777 * SPNEGO blob (which can be zero length), and a
778 * last part which will include the strings
779 * and rest of bcc area. This allows us to avoid
780 * a large buffer 17K allocation
787 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
790 struct cifs_ses
*ses
= sess_data
->ses
;
791 struct smb2_sess_setup_req
*req
;
792 struct TCP_Server_Info
*server
= ses
->server
;
794 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
798 /* First session, not a reauthenticate */
799 req
->hdr
.sync_hdr
.SessionId
= 0;
801 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
802 req
->PreviousSessionId
= sess_data
->previous_session
;
804 req
->Flags
= 0; /* MBZ */
805 /* to enable echos and oplocks */
806 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(3);
808 /* only one of SMB2 signing flags may be set in SMB2 request */
810 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
811 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
812 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
814 req
->SecurityMode
= 0;
816 req
->Capabilities
= 0;
817 req
->Channel
= 0; /* MBZ */
819 sess_data
->iov
[0].iov_base
= (char *)req
;
820 /* 4 for rfc1002 length field and 1 for pad */
821 sess_data
->iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
823 * This variable will be used to clear the buffer
824 * allocated above in case of any error in the calling function.
826 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
832 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
834 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
835 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
839 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
842 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
843 struct kvec rsp_iov
= { NULL
, 0 };
845 /* Testing shows that buffer offset must be at location of Buffer[0] */
846 req
->SecurityBufferOffset
=
847 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
848 1 /* pad */ - 4 /* rfc1001 len */);
849 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
851 inc_rfc1001_len(req
, sess_data
->iov
[1].iov_len
- 1 /* pad */);
853 /* BB add code to build os and lm fields */
855 rc
= SendReceive2(sess_data
->xid
, sess_data
->ses
,
857 &sess_data
->buf0_type
,
858 CIFS_LOG_ERROR
| CIFS_NEG_OP
, &rsp_iov
);
859 cifs_small_buf_release(sess_data
->iov
[0].iov_base
);
860 memcpy(&sess_data
->iov
[0], &rsp_iov
, sizeof(struct kvec
));
866 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
869 struct cifs_ses
*ses
= sess_data
->ses
;
871 mutex_lock(&ses
->server
->srv_mutex
);
872 if (ses
->server
->ops
->generate_signingkey
) {
873 rc
= ses
->server
->ops
->generate_signingkey(ses
);
876 "SMB3 session key generation failed\n");
877 mutex_unlock(&ses
->server
->srv_mutex
);
881 if (!ses
->server
->session_estab
) {
882 ses
->server
->sequence_number
= 0x2;
883 ses
->server
->session_estab
= true;
885 mutex_unlock(&ses
->server
->srv_mutex
);
887 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
888 spin_lock(&GlobalMid_Lock
);
889 ses
->status
= CifsGood
;
890 ses
->need_reconnect
= false;
891 spin_unlock(&GlobalMid_Lock
);
895 #ifdef CONFIG_CIFS_UPCALL
897 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
900 struct cifs_ses
*ses
= sess_data
->ses
;
901 struct cifs_spnego_msg
*msg
;
902 struct key
*spnego_key
= NULL
;
903 struct smb2_sess_setup_rsp
*rsp
= NULL
;
905 rc
= SMB2_sess_alloc_buffer(sess_data
);
909 spnego_key
= cifs_get_spnego_key(ses
);
910 if (IS_ERR(spnego_key
)) {
911 rc
= PTR_ERR(spnego_key
);
916 msg
= spnego_key
->payload
.data
[0];
918 * check version field to make sure that cifs.upcall is
919 * sending us a response in an expected form
921 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
923 "bad cifs.upcall version. Expected %d got %d",
924 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
926 goto out_put_spnego_key
;
929 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
931 if (!ses
->auth_key
.response
) {
933 "Kerberos can't allocate (%u bytes) memory",
936 goto out_put_spnego_key
;
938 ses
->auth_key
.len
= msg
->sesskey_len
;
940 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
941 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
943 rc
= SMB2_sess_sendreceive(sess_data
);
945 goto out_put_spnego_key
;
947 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
948 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
950 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
952 rc
= SMB2_sess_establish_session(sess_data
);
954 key_invalidate(spnego_key
);
957 sess_data
->result
= rc
;
958 sess_data
->func
= NULL
;
959 SMB2_sess_free_buffer(sess_data
);
963 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
965 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
966 sess_data
->result
= -EOPNOTSUPP
;
967 sess_data
->func
= NULL
;
972 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
975 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
978 struct cifs_ses
*ses
= sess_data
->ses
;
979 struct smb2_sess_setup_rsp
*rsp
= NULL
;
980 char *ntlmssp_blob
= NULL
;
981 bool use_spnego
= false; /* else use raw ntlmssp */
985 * If memory allocation is successful, caller of this function
988 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
993 ses
->ntlmssp
->sesskey_per_smbsess
= true;
995 rc
= SMB2_sess_alloc_buffer(sess_data
);
999 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
1001 if (ntlmssp_blob
== NULL
) {
1006 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
1008 /* BB eventually need to add this */
1009 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1013 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
1014 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1016 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1017 sess_data
->iov
[1].iov_len
= blob_length
;
1019 rc
= SMB2_sess_sendreceive(sess_data
);
1020 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1022 /* If true, rc here is expected and not an error */
1023 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
1024 rsp
->hdr
.sync_hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
1030 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
1031 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
1032 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
1033 le16_to_cpu(rsp
->SecurityBufferOffset
));
1037 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
1038 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
1042 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
1045 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
1046 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1049 kfree(ntlmssp_blob
);
1050 SMB2_sess_free_buffer(sess_data
);
1052 sess_data
->result
= 0;
1053 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
1057 kfree(ses
->ntlmssp
);
1058 ses
->ntlmssp
= NULL
;
1059 sess_data
->result
= rc
;
1060 sess_data
->func
= NULL
;
1064 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
1067 struct cifs_ses
*ses
= sess_data
->ses
;
1068 struct smb2_sess_setup_req
*req
;
1069 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1070 unsigned char *ntlmssp_blob
= NULL
;
1071 bool use_spnego
= false; /* else use raw ntlmssp */
1072 u16 blob_length
= 0;
1074 rc
= SMB2_sess_alloc_buffer(sess_data
);
1078 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
1079 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1081 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
, ses
,
1084 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
1089 /* BB eventually need to add this */
1090 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1094 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1095 sess_data
->iov
[1].iov_len
= blob_length
;
1097 rc
= SMB2_sess_sendreceive(sess_data
);
1101 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1103 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
1104 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1106 rc
= SMB2_sess_establish_session(sess_data
);
1108 kfree(ntlmssp_blob
);
1109 SMB2_sess_free_buffer(sess_data
);
1110 kfree(ses
->ntlmssp
);
1111 ses
->ntlmssp
= NULL
;
1112 sess_data
->result
= rc
;
1113 sess_data
->func
= NULL
;
1117 SMB2_select_sec(struct cifs_ses
*ses
, struct SMB2_sess_data
*sess_data
)
1121 type
= smb2_select_sectype(ses
->server
, ses
->sectype
);
1122 cifs_dbg(FYI
, "sess setup type %d\n", type
);
1123 if (type
== Unspecified
) {
1125 "Unable to select appropriate authentication method!");
1131 sess_data
->func
= SMB2_auth_kerberos
;
1134 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
1137 cifs_dbg(VFS
, "secType %d not supported!\n", type
);
1145 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
1146 const struct nls_table
*nls_cp
)
1149 struct TCP_Server_Info
*server
= ses
->server
;
1150 struct SMB2_sess_data
*sess_data
;
1152 cifs_dbg(FYI
, "Session Setup\n");
1155 WARN(1, "%s: server is NULL!\n", __func__
);
1159 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
1163 rc
= SMB2_select_sec(ses
, sess_data
);
1166 sess_data
->xid
= xid
;
1167 sess_data
->ses
= ses
;
1168 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1169 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1171 while (sess_data
->func
)
1172 sess_data
->func(sess_data
);
1174 if ((ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
) && (ses
->sign
))
1175 cifs_dbg(VFS
, "signing requested but authenticated as guest\n");
1176 rc
= sess_data
->result
;
1183 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1185 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1187 struct TCP_Server_Info
*server
;
1190 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1192 if (ses
&& (ses
->server
))
1193 server
= ses
->server
;
1197 /* no need to send SMB logoff if uid already closed due to reconnect */
1198 if (ses
->need_reconnect
)
1199 goto smb2_session_already_dead
;
1201 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
1205 /* since no tcon, smb2_init can not do this, so do here */
1206 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1208 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
1209 flags
|= CIFS_TRANSFORM_REQ
;
1210 else if (server
->sign
)
1211 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1213 rc
= SendReceiveNoRsp(xid
, ses
, (char *) req
, flags
);
1214 cifs_small_buf_release(req
);
1216 * No tcon so can't do
1217 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1220 smb2_session_already_dead
:
1224 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1226 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1229 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1231 /* These are similar values to what Windows uses */
1232 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1234 tcon
->max_chunks
= 256;
1235 tcon
->max_bytes_chunk
= 1048576;
1236 tcon
->max_bytes_copy
= 16777216;
1240 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1241 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1243 struct smb2_tree_connect_req
*req
;
1244 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1246 struct kvec rsp_iov
= { NULL
, 0 };
1250 __le16
*unc_path
= NULL
;
1253 cifs_dbg(FYI
, "TCON\n");
1255 if (!(ses
->server
) || !tree
)
1258 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1259 if (unc_path
== NULL
)
1262 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1264 if (unc_path_len
< 2) {
1269 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1273 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
1280 if ((ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
))
1281 flags
|= CIFS_TRANSFORM_REQ
;
1283 /* since no tcon, smb2_init can not do this, so do here */
1284 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1285 if (ses
->server
->sign
)
1286 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1287 } else if (encryption_required(tcon
))
1288 flags
|= CIFS_TRANSFORM_REQ
;
1290 iov
[0].iov_base
= (char *)req
;
1291 /* 4 for rfc1002 length field and 1 for pad */
1292 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1294 /* Testing shows that buffer offset must be at location of Buffer[0] */
1295 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1296 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1297 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1298 iov
[1].iov_base
= unc_path
;
1299 iov
[1].iov_len
= unc_path_len
;
1301 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
1303 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, flags
, &rsp_iov
);
1304 cifs_small_buf_release(req
);
1305 rsp
= (struct smb2_tree_connect_rsp
*)rsp_iov
.iov_base
;
1309 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1310 tcon
->need_reconnect
= true;
1312 goto tcon_error_exit
;
1316 ses
->ipc_tid
= rsp
->hdr
.sync_hdr
.TreeId
;
1320 switch (rsp
->ShareType
) {
1321 case SMB2_SHARE_TYPE_DISK
:
1322 cifs_dbg(FYI
, "connection to disk share\n");
1324 case SMB2_SHARE_TYPE_PIPE
:
1326 cifs_dbg(FYI
, "connection to pipe share\n");
1328 case SMB2_SHARE_TYPE_PRINT
:
1330 cifs_dbg(FYI
, "connection to printer\n");
1333 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1335 goto tcon_error_exit
;
1338 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1339 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1340 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1341 tcon
->tidStatus
= CifsGood
;
1342 tcon
->need_reconnect
= false;
1343 tcon
->tid
= rsp
->hdr
.sync_hdr
.TreeId
;
1344 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1346 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1347 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1348 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1351 !(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
1352 cifs_dbg(VFS
, "Encryption is requested but not supported\n");
1354 init_copy_chunk_defaults(tcon
);
1355 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1356 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1358 free_rsp_buf(resp_buftype
, rsp
);
1363 if (rsp
&& rsp
->hdr
.sync_hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1364 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1370 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1372 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1374 struct cifs_ses
*ses
= tcon
->ses
;
1377 cifs_dbg(FYI
, "Tree Disconnect\n");
1379 if (!ses
|| !(ses
->server
))
1382 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1385 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
1389 if (encryption_required(tcon
))
1390 flags
|= CIFS_TRANSFORM_REQ
;
1392 rc
= SendReceiveNoRsp(xid
, ses
, (char *)req
, flags
);
1393 cifs_small_buf_release(req
);
1395 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1401 static struct create_durable
*
1402 create_durable_buf(void)
1404 struct create_durable
*buf
;
1406 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1410 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1411 (struct create_durable
, Data
));
1412 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1413 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1414 (struct create_durable
, Name
));
1415 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1416 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1424 static struct create_durable
*
1425 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1427 struct create_durable
*buf
;
1429 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1433 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1434 (struct create_durable
, Data
));
1435 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1436 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1437 (struct create_durable
, Name
));
1438 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1439 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1440 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1441 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1450 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1451 unsigned int *epoch
)
1454 struct create_context
*cc
;
1456 unsigned int remaining
;
1459 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
1460 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
1461 cc
= (struct create_context
*)data_offset
;
1462 while (remaining
>= sizeof(struct create_context
)) {
1463 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1464 if (le16_to_cpu(cc
->NameLength
) == 4 &&
1465 strncmp(name
, "RqLs", 4) == 0)
1466 return server
->ops
->parse_lease_buf(cc
, epoch
);
1468 next
= le32_to_cpu(cc
->Next
);
1472 cc
= (struct create_context
*)((char *)cc
+ next
);
1479 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1480 unsigned int *num_iovec
, __u8
*oplock
)
1482 struct smb2_create_req
*req
= iov
[0].iov_base
;
1483 unsigned int num
= *num_iovec
;
1485 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1486 if (iov
[num
].iov_base
== NULL
)
1488 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1489 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1490 if (!req
->CreateContextsOffset
)
1491 req
->CreateContextsOffset
= cpu_to_le32(
1492 sizeof(struct smb2_create_req
) - 4 +
1493 iov
[num
- 1].iov_len
);
1494 le32_add_cpu(&req
->CreateContextsLength
,
1495 server
->vals
->create_lease_size
);
1496 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
1497 *num_iovec
= num
+ 1;
1501 static struct create_durable_v2
*
1502 create_durable_v2_buf(struct cifs_fid
*pfid
)
1504 struct create_durable_v2
*buf
;
1506 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1510 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1511 (struct create_durable_v2
, dcontext
));
1512 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1513 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1514 (struct create_durable_v2
, Name
));
1515 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1517 buf
->dcontext
.Timeout
= 0; /* Should this be configurable by workload */
1518 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1519 generate_random_uuid(buf
->dcontext
.CreateGuid
);
1520 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1522 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1530 static struct create_durable_handle_reconnect_v2
*
1531 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1533 struct create_durable_handle_reconnect_v2
*buf
;
1535 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1540 buf
->ccontext
.DataOffset
=
1541 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1543 buf
->ccontext
.DataLength
=
1544 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1545 buf
->ccontext
.NameOffset
=
1546 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1548 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1550 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1551 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1552 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1553 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1555 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1564 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1565 struct cifs_open_parms
*oparms
)
1567 struct smb2_create_req
*req
= iov
[0].iov_base
;
1568 unsigned int num
= *num_iovec
;
1570 iov
[num
].iov_base
= create_durable_v2_buf(oparms
->fid
);
1571 if (iov
[num
].iov_base
== NULL
)
1573 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1574 if (!req
->CreateContextsOffset
)
1575 req
->CreateContextsOffset
=
1576 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1578 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1579 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable_v2
));
1580 *num_iovec
= num
+ 1;
1585 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1586 struct cifs_open_parms
*oparms
)
1588 struct smb2_create_req
*req
= iov
[0].iov_base
;
1589 unsigned int num
= *num_iovec
;
1591 /* indicate that we don't need to relock the file */
1592 oparms
->reconnect
= false;
1594 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1595 if (iov
[num
].iov_base
== NULL
)
1597 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1598 if (!req
->CreateContextsOffset
)
1599 req
->CreateContextsOffset
=
1600 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1602 le32_add_cpu(&req
->CreateContextsLength
,
1603 sizeof(struct create_durable_handle_reconnect_v2
));
1604 inc_rfc1001_len(&req
->hdr
,
1605 sizeof(struct create_durable_handle_reconnect_v2
));
1606 *num_iovec
= num
+ 1;
1611 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1612 struct cifs_open_parms
*oparms
, bool use_persistent
)
1614 struct smb2_create_req
*req
= iov
[0].iov_base
;
1615 unsigned int num
= *num_iovec
;
1617 if (use_persistent
) {
1618 if (oparms
->reconnect
)
1619 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1622 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1625 if (oparms
->reconnect
) {
1626 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1627 /* indicate that we don't need to relock the file */
1628 oparms
->reconnect
= false;
1630 iov
[num
].iov_base
= create_durable_buf();
1631 if (iov
[num
].iov_base
== NULL
)
1633 iov
[num
].iov_len
= sizeof(struct create_durable
);
1634 if (!req
->CreateContextsOffset
)
1635 req
->CreateContextsOffset
=
1636 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1638 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1639 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
1640 *num_iovec
= num
+ 1;
1645 alloc_path_with_tree_prefix(__le16
**out_path
, int *out_size
, int *out_len
,
1646 const char *treename
, const __le16
*path
)
1648 int treename_len
, path_len
;
1649 struct nls_table
*cp
;
1650 const __le16 sep
[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1655 treename_len
= strlen(treename
);
1656 if (treename_len
< 2 || !(treename
[0] == '\\' && treename
[1] == '\\'))
1662 path_len
= UniStrnlen((wchar_t *)path
, PATH_MAX
);
1665 * make room for one path separator between the treename and
1668 *out_len
= treename_len
+ 1 + path_len
;
1671 * final path needs to be null-terminated UTF16 with a
1675 *out_size
= roundup((*out_len
+1)*2, 8);
1676 *out_path
= kzalloc(*out_size
, GFP_KERNEL
);
1680 cp
= load_nls_default();
1681 cifs_strtoUTF16(*out_path
, treename
, treename_len
, cp
);
1682 UniStrcat(*out_path
, sep
);
1683 UniStrcat(*out_path
, path
);
1690 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1691 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1692 struct smb2_err_rsp
**err_buf
)
1694 struct smb2_create_req
*req
;
1695 struct smb2_create_rsp
*rsp
;
1696 struct TCP_Server_Info
*server
;
1697 struct cifs_tcon
*tcon
= oparms
->tcon
;
1698 struct cifs_ses
*ses
= tcon
->ses
;
1700 struct kvec rsp_iov
= {NULL
, 0};
1703 __le16
*copy_path
= NULL
;
1706 unsigned int n_iov
= 2;
1707 __u32 file_attributes
= 0;
1708 char *dhc_buf
= NULL
, *lc_buf
= NULL
;
1711 cifs_dbg(FYI
, "create/open\n");
1713 if (ses
&& (ses
->server
))
1714 server
= ses
->server
;
1718 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1722 if (encryption_required(tcon
))
1723 flags
|= CIFS_TRANSFORM_REQ
;
1725 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1726 file_attributes
|= ATTR_READONLY
;
1727 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
1728 file_attributes
|= ATTR_SYSTEM
;
1730 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1731 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1732 /* File attributes ignored on open (used in create though) */
1733 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1734 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1735 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1736 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1738 iov
[0].iov_base
= (char *)req
;
1739 /* 4 for rfc1002 length field */
1740 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1741 /* -1 since last byte is buf[0] which is sent below (path) */
1744 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
1746 /* [MS-SMB2] 2.2.13 NameOffset:
1747 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1748 * the SMB2 header, the file name includes a prefix that will
1749 * be processed during DFS name normalization as specified in
1750 * section 3.3.5.9. Otherwise, the file name is relative to
1751 * the share that is identified by the TreeId in the SMB2
1754 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
1757 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
1758 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
1760 tcon
->treeName
, path
);
1763 req
->NameLength
= cpu_to_le16(name_len
* 2);
1764 uni_path_len
= copy_size
;
1767 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1768 /* MUST set path len (NameLength) to 0 opening root of share */
1769 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1770 if (uni_path_len
% 8 != 0) {
1771 copy_size
= roundup(uni_path_len
, 8);
1772 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1775 memcpy((char *)copy_path
, (const char *)path
,
1777 uni_path_len
= copy_size
;
1782 iov
[1].iov_len
= uni_path_len
;
1783 iov
[1].iov_base
= path
;
1784 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1785 inc_rfc1001_len(req
, uni_path_len
- 1);
1787 if (!server
->oplocks
)
1788 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1790 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1791 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1792 req
->RequestedOplockLevel
= *oplock
;
1794 rc
= add_lease_context(server
, iov
, &n_iov
, oplock
);
1796 cifs_small_buf_release(req
);
1800 lc_buf
= iov
[n_iov
-1].iov_base
;
1803 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1804 /* need to set Next field of lease context if we request it */
1805 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
1806 struct create_context
*ccontext
=
1807 (struct create_context
*)iov
[n_iov
-1].iov_base
;
1809 cpu_to_le32(server
->vals
->create_lease_size
);
1812 rc
= add_durable_context(iov
, &n_iov
, oparms
,
1813 tcon
->use_persistent
);
1815 cifs_small_buf_release(req
);
1820 dhc_buf
= iov
[n_iov
-1].iov_base
;
1823 rc
= SendReceive2(xid
, ses
, iov
, n_iov
, &resp_buftype
, flags
, &rsp_iov
);
1824 cifs_small_buf_release(req
);
1825 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
1828 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1830 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1835 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1836 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1839 memcpy(buf
, &rsp
->CreationTime
, 32);
1840 buf
->AllocationSize
= rsp
->AllocationSize
;
1841 buf
->EndOfFile
= rsp
->EndofFile
;
1842 buf
->Attributes
= rsp
->FileAttributes
;
1843 buf
->NumberOfLinks
= cpu_to_le32(1);
1844 buf
->DeletePending
= 0;
1847 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1848 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1850 *oplock
= rsp
->OplockLevel
;
1855 free_rsp_buf(resp_buftype
, rsp
);
1860 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1863 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1864 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, bool use_ipc
,
1865 char *in_data
, u32 indatalen
,
1866 char **out_data
, u32
*plen
/* returned data len */)
1868 struct smb2_ioctl_req
*req
;
1869 struct smb2_ioctl_rsp
*rsp
;
1870 struct smb2_sync_hdr
*shdr
;
1871 struct cifs_ses
*ses
;
1873 struct kvec rsp_iov
;
1879 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1881 if (out_data
!= NULL
)
1884 /* zero out returned data len, in case of error */
1893 if (!ses
|| !(ses
->server
))
1896 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1901 if (ses
->ipc_tid
== 0) {
1902 cifs_small_buf_release(req
);
1906 cifs_dbg(FYI
, "replacing tid 0x%x with IPC tid 0x%x\n",
1907 req
->hdr
.sync_hdr
.TreeId
, ses
->ipc_tid
);
1908 req
->hdr
.sync_hdr
.TreeId
= ses
->ipc_tid
;
1910 if (encryption_required(tcon
))
1911 flags
|= CIFS_TRANSFORM_REQ
;
1913 req
->CtlCode
= cpu_to_le32(opcode
);
1914 req
->PersistentFileId
= persistent_fid
;
1915 req
->VolatileFileId
= volatile_fid
;
1918 req
->InputCount
= cpu_to_le32(indatalen
);
1919 /* do not set InputOffset if no input data */
1921 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1922 iov
[1].iov_base
= in_data
;
1923 iov
[1].iov_len
= indatalen
;
1928 req
->OutputOffset
= 0;
1929 req
->OutputCount
= 0; /* MBZ */
1932 * Could increase MaxOutputResponse, but that would require more
1933 * than one credit. Windows typically sets this smaller, but for some
1934 * ioctls it may be useful to allow server to send more. No point
1935 * limiting what the server can send as long as fits in one credit
1936 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
1937 * (by default, note that it can be overridden to make max larger)
1938 * in responses (except for read responses which can be bigger.
1939 * We may want to bump this limit up
1941 req
->MaxOutputResponse
= cpu_to_le32(CIFSMaxBufSize
);
1944 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1948 iov
[0].iov_base
= (char *)req
;
1951 * If no input data, the size of ioctl struct in
1952 * protocol spec still includes a 1 byte data buffer,
1953 * but if input data passed to ioctl, we do not
1954 * want to double count this, so we do not send
1955 * the dummy one byte of data in iovec[0] if sending
1956 * input data (in iovec[1]). We also must add 4 bytes
1957 * in first iovec to allow for rfc1002 length field.
1961 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1962 inc_rfc1001_len(req
, indatalen
- 1);
1964 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1967 rc
= SendReceive2(xid
, ses
, iov
, n_iov
, &resp_buftype
, flags
, &rsp_iov
);
1968 cifs_small_buf_release(req
);
1969 rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
.iov_base
;
1971 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
1972 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1974 } else if (rc
== -EINVAL
) {
1975 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
1976 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
1977 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1982 /* check if caller wants to look at return data or just return rc */
1983 if ((plen
== NULL
) || (out_data
== NULL
))
1986 *plen
= le32_to_cpu(rsp
->OutputCount
);
1988 /* We check for obvious errors in the output buffer length and offset */
1990 goto ioctl_exit
; /* server returned no data */
1991 else if (*plen
> 0xFF00) {
1992 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1998 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1999 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
2000 le32_to_cpu(rsp
->OutputOffset
));
2006 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
2007 if (*out_data
== NULL
) {
2012 shdr
= get_sync_hdr(rsp
);
2013 memcpy(*out_data
, (char *)shdr
+ le32_to_cpu(rsp
->OutputOffset
), *plen
);
2015 free_rsp_buf(resp_buftype
, rsp
);
2020 * Individual callers to ioctl worker function follow
2024 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
2025 u64 persistent_fid
, u64 volatile_fid
)
2028 struct compress_ioctl fsctl_input
;
2029 char *ret_data
= NULL
;
2031 fsctl_input
.CompressionState
=
2032 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
2034 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
2035 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
2036 false /* use_ipc */,
2037 (char *)&fsctl_input
/* data input */,
2038 2 /* in data len */, &ret_data
/* out data */, NULL
);
2040 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
2046 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
2047 u64 persistent_fid
, u64 volatile_fid
)
2049 struct smb2_close_req
*req
;
2050 struct smb2_close_rsp
*rsp
;
2051 struct cifs_ses
*ses
= tcon
->ses
;
2053 struct kvec rsp_iov
;
2058 cifs_dbg(FYI
, "Close\n");
2060 if (!ses
|| !(ses
->server
))
2063 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
2067 if (encryption_required(tcon
))
2068 flags
|= CIFS_TRANSFORM_REQ
;
2070 req
->PersistentFileId
= persistent_fid
;
2071 req
->VolatileFileId
= volatile_fid
;
2073 iov
[0].iov_base
= (char *)req
;
2074 /* 4 for rfc1002 length field */
2075 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2077 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2078 cifs_small_buf_release(req
);
2079 rsp
= (struct smb2_close_rsp
*)rsp_iov
.iov_base
;
2082 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
2086 /* BB FIXME - decode close response, update inode for caching */
2089 free_rsp_buf(resp_buftype
, rsp
);
2094 validate_buf(unsigned int offset
, unsigned int buffer_length
,
2095 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
2098 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
2099 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
2100 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
2101 char *end_of_buf
= begin_of_buf
+ buffer_length
;
2104 if (buffer_length
< min_buf_size
) {
2105 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
2106 buffer_length
, min_buf_size
);
2110 /* check if beyond RFC1001 maximum length */
2111 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
2112 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
2113 buffer_length
, smb_len
);
2117 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
2118 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
2126 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2127 * Caller must free buffer.
2130 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
2131 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
2135 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
2141 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
2145 memcpy(data
, begin_of_buf
, buffer_length
);
2151 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2152 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
, u8 info_type
,
2153 u32 additional_info
, size_t output_len
, size_t min_len
, void **data
,
2156 struct smb2_query_info_req
*req
;
2157 struct smb2_query_info_rsp
*rsp
= NULL
;
2159 struct kvec rsp_iov
;
2162 struct cifs_ses
*ses
= tcon
->ses
;
2165 cifs_dbg(FYI
, "Query Info\n");
2167 if (!ses
|| !(ses
->server
))
2170 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2174 if (encryption_required(tcon
))
2175 flags
|= CIFS_TRANSFORM_REQ
;
2177 req
->InfoType
= info_type
;
2178 req
->FileInfoClass
= info_class
;
2179 req
->PersistentFileId
= persistent_fid
;
2180 req
->VolatileFileId
= volatile_fid
;
2181 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
2182 /* 4 for rfc1002 length field and 1 for Buffer */
2183 req
->InputBufferOffset
=
2184 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2185 req
->OutputBufferLength
= cpu_to_le32(output_len
);
2187 iov
[0].iov_base
= (char *)req
;
2188 /* 4 for rfc1002 length field */
2189 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2191 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2192 cifs_small_buf_release(req
);
2193 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
2196 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2201 *dlen
= le32_to_cpu(rsp
->OutputBufferLength
);
2203 *data
= kmalloc(*dlen
, GFP_KERNEL
);
2206 "Error %d allocating memory for acl\n",
2214 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2215 le32_to_cpu(rsp
->OutputBufferLength
),
2216 &rsp
->hdr
, min_len
, *data
);
2219 free_rsp_buf(resp_buftype
, rsp
);
2223 int SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2224 u64 persistent_fid
, u64 volatile_fid
, struct smb2_file_all_info
*data
)
2226 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2227 FILE_ALL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2228 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
2229 sizeof(struct smb2_file_all_info
), (void **)&data
,
2234 SMB2_query_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
2235 u64 persistent_fid
, u64 volatile_fid
,
2236 void **data
, u32
*plen
)
2238 __u32 additional_info
= OWNER_SECINFO
| GROUP_SECINFO
| DACL_SECINFO
;
2241 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2242 0, SMB2_O_INFO_SECURITY
, additional_info
,
2243 SMB2_MAX_BUFFER_SIZE
,
2244 sizeof(struct smb2_file_all_info
), data
, plen
);
2248 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
2249 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
2251 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2252 FILE_INTERNAL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2253 sizeof(struct smb2_file_internal_info
),
2254 sizeof(struct smb2_file_internal_info
),
2255 (void **)&uniqueid
, NULL
);
2259 * This is a no-op for now. We're not really interested in the reply, but
2260 * rather in the fact that the server sent one and that server->lstrp
2263 * FIXME: maybe we should consider checking that the reply matches request?
2266 smb2_echo_callback(struct mid_q_entry
*mid
)
2268 struct TCP_Server_Info
*server
= mid
->callback_data
;
2269 struct smb2_echo_rsp
*rsp
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
2270 unsigned int credits_received
= 1;
2272 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
2273 credits_received
= le16_to_cpu(rsp
->hdr
.sync_hdr
.CreditRequest
);
2275 DeleteMidQEntry(mid
);
2276 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
2279 void smb2_reconnect_server(struct work_struct
*work
)
2281 struct TCP_Server_Info
*server
= container_of(work
,
2282 struct TCP_Server_Info
, reconnect
.work
);
2283 struct cifs_ses
*ses
;
2284 struct cifs_tcon
*tcon
, *tcon2
;
2285 struct list_head tmp_list
;
2286 int tcon_exist
= false;
2288 int resched
= false;
2291 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2292 mutex_lock(&server
->reconnect_mutex
);
2294 INIT_LIST_HEAD(&tmp_list
);
2295 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
2297 spin_lock(&cifs_tcp_ses_lock
);
2298 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
2299 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
2300 if (tcon
->need_reconnect
|| tcon
->need_reopen_files
) {
2302 list_add_tail(&tcon
->rlist
, &tmp_list
);
2308 * Get the reference to server struct to be sure that the last call of
2309 * cifs_put_tcon() in the loop below won't release the server pointer.
2312 server
->srv_count
++;
2314 spin_unlock(&cifs_tcp_ses_lock
);
2316 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
2317 rc
= smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
);
2319 cifs_reopen_persistent_handles(tcon
);
2322 list_del_init(&tcon
->rlist
);
2323 cifs_put_tcon(tcon
);
2326 cifs_dbg(FYI
, "Reconnecting tcons finished\n");
2328 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 2 * HZ
);
2329 mutex_unlock(&server
->reconnect_mutex
);
2331 /* now we can safely release srv struct */
2333 cifs_put_tcp_session(server
, 1);
2337 SMB2_echo(struct TCP_Server_Info
*server
)
2339 struct smb2_echo_req
*req
;
2342 struct smb_rqst rqst
= { .rq_iov
= iov
,
2345 cifs_dbg(FYI
, "In echo request\n");
2347 if (server
->tcpStatus
== CifsNeedNegotiate
) {
2348 /* No need to send echo on newly established connections */
2349 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
2353 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
2357 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
2359 /* 4 for rfc1002 length field */
2361 iov
[0].iov_base
= (char *)req
;
2362 iov
[1].iov_len
= get_rfc1002_length(req
);
2363 iov
[1].iov_base
= (char *)req
+ 4;
2365 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, NULL
,
2366 server
, CIFS_ECHO_OP
);
2368 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
2370 cifs_small_buf_release(req
);
2375 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2378 struct smb2_flush_req
*req
;
2379 struct cifs_ses
*ses
= tcon
->ses
;
2381 struct kvec rsp_iov
;
2386 cifs_dbg(FYI
, "Flush\n");
2388 if (!ses
|| !(ses
->server
))
2391 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
2395 if (encryption_required(tcon
))
2396 flags
|= CIFS_TRANSFORM_REQ
;
2398 req
->PersistentFileId
= persistent_fid
;
2399 req
->VolatileFileId
= volatile_fid
;
2401 iov
[0].iov_base
= (char *)req
;
2402 /* 4 for rfc1002 length field */
2403 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2405 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2406 cifs_small_buf_release(req
);
2409 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
2411 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2416 * To form a chain of read requests, any read requests after the first should
2417 * have the end_of_chain boolean set to true.
2420 smb2_new_read_req(void **buf
, unsigned int *total_len
,
2421 struct cifs_io_parms
*io_parms
, unsigned int remaining_bytes
,
2425 struct smb2_read_plain_req
*req
= NULL
;
2426 struct smb2_sync_hdr
*shdr
;
2428 rc
= smb2_plain_req_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
,
2432 if (io_parms
->tcon
->ses
->server
== NULL
)
2433 return -ECONNABORTED
;
2435 shdr
= &req
->sync_hdr
;
2436 shdr
->ProcessId
= cpu_to_le32(io_parms
->pid
);
2438 req
->PersistentFileId
= io_parms
->persistent_fid
;
2439 req
->VolatileFileId
= io_parms
->volatile_fid
;
2440 req
->ReadChannelInfoOffset
= 0; /* reserved */
2441 req
->ReadChannelInfoLength
= 0; /* reserved */
2442 req
->Channel
= 0; /* reserved */
2443 req
->MinimumCount
= 0;
2444 req
->Length
= cpu_to_le32(io_parms
->length
);
2445 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2447 if (request_type
& CHAINED_REQUEST
) {
2448 if (!(request_type
& END_OF_CHAIN
)) {
2449 /* next 8-byte aligned request */
2450 *total_len
= DIV_ROUND_UP(*total_len
, 8) * 8;
2451 shdr
->NextCommand
= cpu_to_le32(*total_len
);
2452 } else /* END_OF_CHAIN */
2453 shdr
->NextCommand
= 0;
2454 if (request_type
& RELATED_REQUEST
) {
2455 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
2457 * Related requests use info from previous read request
2460 shdr
->SessionId
= 0xFFFFFFFF;
2461 shdr
->TreeId
= 0xFFFFFFFF;
2462 req
->PersistentFileId
= 0xFFFFFFFF;
2463 req
->VolatileFileId
= 0xFFFFFFFF;
2466 if (remaining_bytes
> io_parms
->length
)
2467 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
2469 req
->RemainingBytes
= 0;
2476 smb2_readv_callback(struct mid_q_entry
*mid
)
2478 struct cifs_readdata
*rdata
= mid
->callback_data
;
2479 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2480 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2481 struct smb2_sync_hdr
*shdr
=
2482 (struct smb2_sync_hdr
*)rdata
->iov
[1].iov_base
;
2483 unsigned int credits_received
= 1;
2484 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2486 .rq_pages
= rdata
->pages
,
2487 .rq_npages
= rdata
->nr_pages
,
2488 .rq_pagesz
= rdata
->pagesz
,
2489 .rq_tailsz
= rdata
->tailsz
};
2491 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2492 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
2495 switch (mid
->mid_state
) {
2496 case MID_RESPONSE_RECEIVED
:
2497 credits_received
= le16_to_cpu(shdr
->CreditRequest
);
2498 /* result already set, check signature */
2499 if (server
->sign
&& !mid
->decrypted
) {
2502 rc
= smb2_verify_signature(&rqst
, server
);
2504 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
2507 /* FIXME: should this be counted toward the initiating task? */
2508 task_io_account_read(rdata
->got_bytes
);
2509 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2511 case MID_REQUEST_SUBMITTED
:
2512 case MID_RETRY_NEEDED
:
2513 rdata
->result
= -EAGAIN
;
2514 if (server
->sign
&& rdata
->got_bytes
)
2515 /* reset bytes number since we can not check a sign */
2516 rdata
->got_bytes
= 0;
2517 /* FIXME: should this be counted toward the initiating task? */
2518 task_io_account_read(rdata
->got_bytes
);
2519 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2522 if (rdata
->result
!= -ENODATA
)
2523 rdata
->result
= -EIO
;
2527 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
2529 queue_work(cifsiod_wq
, &rdata
->work
);
2530 DeleteMidQEntry(mid
);
2531 add_credits(server
, credits_received
, 0);
2534 /* smb2_async_readv - send an async read, and set up mid to handle result */
2536 smb2_async_readv(struct cifs_readdata
*rdata
)
2540 struct smb2_sync_hdr
*shdr
;
2541 struct cifs_io_parms io_parms
;
2542 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2544 struct TCP_Server_Info
*server
;
2545 unsigned int total_len
;
2548 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
2549 __func__
, rdata
->offset
, rdata
->bytes
);
2551 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2552 io_parms
.offset
= rdata
->offset
;
2553 io_parms
.length
= rdata
->bytes
;
2554 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
2555 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
2556 io_parms
.pid
= rdata
->pid
;
2558 server
= io_parms
.tcon
->ses
->server
;
2560 rc
= smb2_new_read_req((void **) &buf
, &total_len
, &io_parms
, 0, 0);
2562 if (rc
== -EAGAIN
&& rdata
->credits
) {
2563 /* credits was reset by reconnect */
2565 /* reduce in_flight value since we won't send the req */
2566 spin_lock(&server
->req_lock
);
2567 server
->in_flight
--;
2568 spin_unlock(&server
->req_lock
);
2573 if (encryption_required(io_parms
.tcon
))
2574 flags
|= CIFS_TRANSFORM_REQ
;
2576 req_len
= cpu_to_be32(total_len
);
2578 rdata
->iov
[0].iov_base
= &req_len
;
2579 rdata
->iov
[0].iov_len
= sizeof(__be32
);
2580 rdata
->iov
[1].iov_base
= buf
;
2581 rdata
->iov
[1].iov_len
= total_len
;
2583 shdr
= (struct smb2_sync_hdr
*)buf
;
2585 if (rdata
->credits
) {
2586 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
2587 SMB2_MAX_BUFFER_SIZE
));
2588 shdr
->CreditRequest
= shdr
->CreditCharge
;
2589 spin_lock(&server
->req_lock
);
2590 server
->credits
+= rdata
->credits
-
2591 le16_to_cpu(shdr
->CreditCharge
);
2592 spin_unlock(&server
->req_lock
);
2593 wake_up(&server
->request_q
);
2594 flags
|= CIFS_HAS_CREDITS
;
2597 kref_get(&rdata
->refcount
);
2598 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
2599 cifs_readv_receive
, smb2_readv_callback
,
2600 smb3_handle_read_data
, rdata
, flags
);
2602 kref_put(&rdata
->refcount
, cifs_readdata_release
);
2603 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
2606 cifs_small_buf_release(buf
);
2611 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2612 unsigned int *nbytes
, char **buf
, int *buf_type
)
2614 int resp_buftype
, rc
= -EACCES
;
2615 struct smb2_read_plain_req
*req
= NULL
;
2616 struct smb2_read_rsp
*rsp
= NULL
;
2617 struct smb2_sync_hdr
*shdr
;
2619 struct kvec rsp_iov
;
2620 unsigned int total_len
;
2622 struct smb_rqst rqst
= { .rq_iov
= iov
,
2624 int flags
= CIFS_LOG_ERROR
;
2625 struct cifs_ses
*ses
= io_parms
->tcon
->ses
;
2628 rc
= smb2_new_read_req((void **)&req
, &total_len
, io_parms
, 0, 0);
2632 if (encryption_required(io_parms
->tcon
))
2633 flags
|= CIFS_TRANSFORM_REQ
;
2635 req_len
= cpu_to_be32(total_len
);
2637 iov
[0].iov_base
= &req_len
;
2638 iov
[0].iov_len
= sizeof(__be32
);
2639 iov
[1].iov_base
= req
;
2640 iov
[1].iov_len
= total_len
;
2642 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2643 cifs_small_buf_release(req
);
2645 rsp
= (struct smb2_read_rsp
*)rsp_iov
.iov_base
;
2646 shdr
= get_sync_hdr(rsp
);
2648 if (shdr
->Status
== STATUS_END_OF_FILE
) {
2649 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2654 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
2655 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
2657 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2658 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
2659 (*nbytes
> io_parms
->length
)) {
2660 cifs_dbg(FYI
, "bad length %d for count %d\n",
2661 *nbytes
, io_parms
->length
);
2668 memcpy(*buf
, (char *)shdr
+ rsp
->DataOffset
, *nbytes
);
2669 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2670 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
2671 *buf
= rsp_iov
.iov_base
;
2672 if (resp_buftype
== CIFS_SMALL_BUFFER
)
2673 *buf_type
= CIFS_SMALL_BUFFER
;
2674 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
2675 *buf_type
= CIFS_LARGE_BUFFER
;
2681 * Check the mid_state and signature on received buffer (if any), and queue the
2682 * workqueue completion task.
2685 smb2_writev_callback(struct mid_q_entry
*mid
)
2687 struct cifs_writedata
*wdata
= mid
->callback_data
;
2688 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2689 unsigned int written
;
2690 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
2691 unsigned int credits_received
= 1;
2693 switch (mid
->mid_state
) {
2694 case MID_RESPONSE_RECEIVED
:
2695 credits_received
= le16_to_cpu(rsp
->hdr
.sync_hdr
.CreditRequest
);
2696 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
2697 if (wdata
->result
!= 0)
2700 written
= le32_to_cpu(rsp
->DataLength
);
2702 * Mask off high 16 bits when bytes written as returned
2703 * by the server is greater than bytes requested by the
2704 * client. OS/2 servers are known to set incorrect
2707 if (written
> wdata
->bytes
)
2710 if (written
< wdata
->bytes
)
2711 wdata
->result
= -ENOSPC
;
2713 wdata
->bytes
= written
;
2715 case MID_REQUEST_SUBMITTED
:
2716 case MID_RETRY_NEEDED
:
2717 wdata
->result
= -EAGAIN
;
2720 wdata
->result
= -EIO
;
2725 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2727 queue_work(cifsiod_wq
, &wdata
->work
);
2728 DeleteMidQEntry(mid
);
2729 add_credits(tcon
->ses
->server
, credits_received
, 0);
2732 /* smb2_async_writev - send an async write, and set up mid to handle result */
2734 smb2_async_writev(struct cifs_writedata
*wdata
,
2735 void (*release
)(struct kref
*kref
))
2737 int rc
= -EACCES
, flags
= 0;
2738 struct smb2_write_req
*req
= NULL
;
2739 struct smb2_sync_hdr
*shdr
;
2740 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2741 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2743 struct smb_rqst rqst
= { };
2745 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
2747 if (rc
== -EAGAIN
&& wdata
->credits
) {
2748 /* credits was reset by reconnect */
2750 /* reduce in_flight value since we won't send the req */
2751 spin_lock(&server
->req_lock
);
2752 server
->in_flight
--;
2753 spin_unlock(&server
->req_lock
);
2755 goto async_writev_out
;
2758 if (encryption_required(tcon
))
2759 flags
|= CIFS_TRANSFORM_REQ
;
2761 shdr
= get_sync_hdr(req
);
2762 shdr
->ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
2764 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
2765 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
2766 req
->WriteChannelInfoOffset
= 0;
2767 req
->WriteChannelInfoLength
= 0;
2769 req
->Offset
= cpu_to_le64(wdata
->offset
);
2770 /* 4 for rfc1002 length field */
2771 req
->DataOffset
= cpu_to_le16(
2772 offsetof(struct smb2_write_req
, Buffer
) - 4);
2773 req
->RemainingBytes
= 0;
2775 /* 4 for rfc1002 length field and 1 for Buffer */
2777 iov
[0].iov_base
= req
;
2778 iov
[1].iov_len
= get_rfc1002_length(req
) - 1;
2779 iov
[1].iov_base
= (char *)req
+ 4;
2783 rqst
.rq_pages
= wdata
->pages
;
2784 rqst
.rq_npages
= wdata
->nr_pages
;
2785 rqst
.rq_pagesz
= wdata
->pagesz
;
2786 rqst
.rq_tailsz
= wdata
->tailsz
;
2788 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
2789 wdata
->offset
, wdata
->bytes
);
2791 req
->Length
= cpu_to_le32(wdata
->bytes
);
2793 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
2795 if (wdata
->credits
) {
2796 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
2797 SMB2_MAX_BUFFER_SIZE
));
2798 shdr
->CreditRequest
= shdr
->CreditCharge
;
2799 spin_lock(&server
->req_lock
);
2800 server
->credits
+= wdata
->credits
-
2801 le16_to_cpu(shdr
->CreditCharge
);
2802 spin_unlock(&server
->req_lock
);
2803 wake_up(&server
->request_q
);
2804 flags
|= CIFS_HAS_CREDITS
;
2807 kref_get(&wdata
->refcount
);
2808 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, NULL
,
2812 kref_put(&wdata
->refcount
, release
);
2813 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2817 cifs_small_buf_release(req
);
2822 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2823 * The length field from io_parms must be at least 1 and indicates a number of
2824 * elements with data to write that begins with position 1 in iov array. All
2825 * data length is specified by count.
2828 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2829 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
2832 struct smb2_write_req
*req
= NULL
;
2833 struct smb2_write_rsp
*rsp
= NULL
;
2835 struct kvec rsp_iov
;
2843 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
2847 if (io_parms
->tcon
->ses
->server
== NULL
)
2848 return -ECONNABORTED
;
2850 if (encryption_required(io_parms
->tcon
))
2851 flags
|= CIFS_TRANSFORM_REQ
;
2853 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
2855 req
->PersistentFileId
= io_parms
->persistent_fid
;
2856 req
->VolatileFileId
= io_parms
->volatile_fid
;
2857 req
->WriteChannelInfoOffset
= 0;
2858 req
->WriteChannelInfoLength
= 0;
2860 req
->Length
= cpu_to_le32(io_parms
->length
);
2861 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2862 /* 4 for rfc1002 length field */
2863 req
->DataOffset
= cpu_to_le16(
2864 offsetof(struct smb2_write_req
, Buffer
) - 4);
2865 req
->RemainingBytes
= 0;
2867 iov
[0].iov_base
= (char *)req
;
2868 /* 4 for rfc1002 length field and 1 for Buffer */
2869 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2871 /* length of entire message including data to be written */
2872 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
2874 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
2875 &resp_buftype
, flags
, &rsp_iov
);
2876 cifs_small_buf_release(req
);
2877 rsp
= (struct smb2_write_rsp
*)rsp_iov
.iov_base
;
2880 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
2881 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
2883 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2885 free_rsp_buf(resp_buftype
, rsp
);
2890 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
2893 unsigned int entrycount
= 0;
2894 unsigned int next_offset
= 0;
2895 FILE_DIRECTORY_INFO
*entryptr
;
2897 if (bufstart
== NULL
)
2900 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
2903 entryptr
= (FILE_DIRECTORY_INFO
*)
2904 ((char *)entryptr
+ next_offset
);
2906 if ((char *)entryptr
+ size
> end_of_buf
) {
2907 cifs_dbg(VFS
, "malformed search entry would overflow\n");
2911 len
= le32_to_cpu(entryptr
->FileNameLength
);
2912 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
2913 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
2918 *lastentry
= (char *)entryptr
;
2921 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
2933 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
2934 u64 persistent_fid
, u64 volatile_fid
, int index
,
2935 struct cifs_search_info
*srch_inf
)
2937 struct smb2_query_directory_req
*req
;
2938 struct smb2_query_directory_rsp
*rsp
= NULL
;
2940 struct kvec rsp_iov
;
2943 int resp_buftype
= CIFS_NO_BUFFER
;
2944 unsigned char *bufptr
;
2945 struct TCP_Server_Info
*server
;
2946 struct cifs_ses
*ses
= tcon
->ses
;
2947 __le16 asteriks
= cpu_to_le16('*');
2949 unsigned int output_size
= CIFSMaxBufSize
;
2950 size_t info_buf_size
;
2953 if (ses
&& (ses
->server
))
2954 server
= ses
->server
;
2958 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
2962 if (encryption_required(tcon
))
2963 flags
|= CIFS_TRANSFORM_REQ
;
2965 switch (srch_inf
->info_level
) {
2966 case SMB_FIND_FILE_DIRECTORY_INFO
:
2967 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
2968 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
2970 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
2971 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
2972 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
2975 cifs_dbg(VFS
, "info level %u isn't supported\n",
2976 srch_inf
->info_level
);
2981 req
->FileIndex
= cpu_to_le32(index
);
2982 req
->PersistentFileId
= persistent_fid
;
2983 req
->VolatileFileId
= volatile_fid
;
2986 bufptr
= req
->Buffer
;
2987 memcpy(bufptr
, &asteriks
, len
);
2989 req
->FileNameOffset
=
2990 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
2991 req
->FileNameLength
= cpu_to_le16(len
);
2993 * BB could be 30 bytes or so longer if we used SMB2 specific
2994 * buffer lengths, but this is safe and close enough.
2996 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
2997 output_size
= min_t(unsigned int, output_size
, 2 << 15);
2998 req
->OutputBufferLength
= cpu_to_le32(output_size
);
3000 iov
[0].iov_base
= (char *)req
;
3001 /* 4 for RFC1001 length and 1 for Buffer */
3002 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
3004 iov
[1].iov_base
= (char *)(req
->Buffer
);
3005 iov
[1].iov_len
= len
;
3007 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
3009 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, flags
, &rsp_iov
);
3010 cifs_small_buf_release(req
);
3011 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
.iov_base
;
3014 if (rc
== -ENODATA
&&
3015 rsp
->hdr
.sync_hdr
.Status
== STATUS_NO_MORE_FILES
) {
3016 srch_inf
->endOfSearch
= true;
3019 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
3023 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
3024 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
3029 srch_inf
->unicode
= true;
3031 if (srch_inf
->ntwrk_buf_start
) {
3032 if (srch_inf
->smallBuf
)
3033 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
3035 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
3037 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
3038 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
3039 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
3040 /* 4 for rfc1002 length field */
3041 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
3042 srch_inf
->entries_in_buffer
=
3043 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
3044 &srch_inf
->last_entry
, info_buf_size
);
3045 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
3046 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
3047 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
3048 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
3049 if (resp_buftype
== CIFS_LARGE_BUFFER
)
3050 srch_inf
->smallBuf
= false;
3051 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
3052 srch_inf
->smallBuf
= true;
3054 cifs_dbg(VFS
, "illegal search buffer type\n");
3059 free_rsp_buf(resp_buftype
, rsp
);
3064 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3065 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, u8 info_class
,
3066 u8 info_type
, u32 additional_info
, unsigned int num
,
3067 void **data
, unsigned int *size
)
3069 struct smb2_set_info_req
*req
;
3070 struct smb2_set_info_rsp
*rsp
= NULL
;
3072 struct kvec rsp_iov
;
3076 struct cifs_ses
*ses
= tcon
->ses
;
3079 if (!ses
|| !(ses
->server
))
3085 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
3089 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
3095 if (encryption_required(tcon
))
3096 flags
|= CIFS_TRANSFORM_REQ
;
3098 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3100 req
->InfoType
= info_type
;
3101 req
->FileInfoClass
= info_class
;
3102 req
->PersistentFileId
= persistent_fid
;
3103 req
->VolatileFileId
= volatile_fid
;
3104 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
3106 /* 4 for RFC1001 length and 1 for Buffer */
3108 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
3109 req
->BufferLength
= cpu_to_le32(*size
);
3111 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
3113 memcpy(req
->Buffer
, *data
, *size
);
3115 iov
[0].iov_base
= (char *)req
;
3116 /* 4 for RFC1001 length */
3117 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
3119 for (i
= 1; i
< num
; i
++) {
3120 inc_rfc1001_len(req
, size
[i
]);
3121 le32_add_cpu(&req
->BufferLength
, size
[i
]);
3122 iov
[i
].iov_base
= (char *)data
[i
];
3123 iov
[i
].iov_len
= size
[i
];
3126 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, flags
, &rsp_iov
);
3127 cifs_small_buf_release(req
);
3128 rsp
= (struct smb2_set_info_rsp
*)rsp_iov
.iov_base
;
3131 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
3133 free_rsp_buf(resp_buftype
, rsp
);
3139 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
3140 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3142 struct smb2_file_rename_info info
;
3144 unsigned int size
[2];
3146 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3148 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
3152 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
3153 /* 0 = fail if target already exists */
3154 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3155 info
.FileNameLength
= cpu_to_le32(len
);
3158 size
[0] = sizeof(struct smb2_file_rename_info
);
3160 data
[1] = target_file
;
3161 size
[1] = len
+ 2 /* null */;
3163 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3164 current
->tgid
, FILE_RENAME_INFORMATION
, SMB2_O_INFO_FILE
,
3171 SMB2_rmdir(const unsigned int xid
, struct cifs_tcon
*tcon
,
3172 u64 persistent_fid
, u64 volatile_fid
)
3174 __u8 delete_pending
= 1;
3178 data
= &delete_pending
;
3179 size
= 1; /* sizeof __u8 */
3181 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3182 current
->tgid
, FILE_DISPOSITION_INFORMATION
, SMB2_O_INFO_FILE
,
3183 0, 1, &data
, &size
);
3187 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
3188 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3190 struct smb2_file_link_info info
;
3192 unsigned int size
[2];
3194 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3196 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
3200 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
3201 /* 0 = fail if link already exists */
3202 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3203 info
.FileNameLength
= cpu_to_le32(len
);
3206 size
[0] = sizeof(struct smb2_file_link_info
);
3208 data
[1] = target_file
;
3209 size
[1] = len
+ 2 /* null */;
3211 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3212 current
->tgid
, FILE_LINK_INFORMATION
, SMB2_O_INFO_FILE
,
3219 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3220 u64 volatile_fid
, u32 pid
, __le64
*eof
, bool is_falloc
)
3222 struct smb2_file_eof_info info
;
3226 info
.EndOfFile
= *eof
;
3229 size
= sizeof(struct smb2_file_eof_info
);
3232 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3233 pid
, FILE_ALLOCATION_INFORMATION
, SMB2_O_INFO_FILE
,
3234 0, 1, &data
, &size
);
3236 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3237 pid
, FILE_END_OF_FILE_INFORMATION
, SMB2_O_INFO_FILE
,
3238 0, 1, &data
, &size
);
3242 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3243 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
3246 size
= sizeof(FILE_BASIC_INFO
);
3247 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3248 current
->tgid
, FILE_BASIC_INFORMATION
, SMB2_O_INFO_FILE
,
3249 0, 1, (void **)&buf
, &size
);
3253 SMB2_set_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
3254 u64 persistent_fid
, u64 volatile_fid
,
3255 struct cifs_ntsd
*pnntsd
, int pacllen
, int aclflag
)
3257 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3258 current
->tgid
, 0, SMB2_O_INFO_SECURITY
, aclflag
,
3259 1, (void **)&pnntsd
, &pacllen
);
3263 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3264 const u64 persistent_fid
, const u64 volatile_fid
,
3268 struct smb2_oplock_break
*req
= NULL
;
3269 int flags
= CIFS_OBREAK_OP
;
3271 cifs_dbg(FYI
, "SMB2_oplock_break\n");
3272 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
3276 if (encryption_required(tcon
))
3277 flags
|= CIFS_TRANSFORM_REQ
;
3279 req
->VolatileFid
= volatile_fid
;
3280 req
->PersistentFid
= persistent_fid
;
3281 req
->OplockLevel
= oplock_level
;
3282 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
3284 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, flags
);
3285 cifs_small_buf_release(req
);
3288 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3289 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
3296 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
3297 struct kstatfs
*kst
)
3299 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
3300 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
3301 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
3302 kst
->f_bfree
= kst
->f_bavail
=
3303 le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
3308 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
3309 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
3312 struct smb2_query_info_req
*req
;
3314 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
3316 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
3319 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
3323 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
3324 req
->FileInfoClass
= level
;
3325 req
->PersistentFileId
= persistent_fid
;
3326 req
->VolatileFileId
= volatile_fid
;
3327 /* 4 for rfc1002 length field and 1 for pad */
3328 req
->InputBufferOffset
=
3329 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
3330 req
->OutputBufferLength
= cpu_to_le32(
3331 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
3333 iov
->iov_base
= (char *)req
;
3334 /* 4 for rfc1002 length field */
3335 iov
->iov_len
= get_rfc1002_length(req
) + 4;
3340 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3341 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
3343 struct smb2_query_info_rsp
*rsp
= NULL
;
3345 struct kvec rsp_iov
;
3348 struct cifs_ses
*ses
= tcon
->ses
;
3349 struct smb2_fs_full_size_info
*info
= NULL
;
3352 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
3353 sizeof(struct smb2_fs_full_size_info
),
3354 persistent_fid
, volatile_fid
);
3358 if (encryption_required(tcon
))
3359 flags
|= CIFS_TRANSFORM_REQ
;
3361 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
3362 cifs_small_buf_release(iov
.iov_base
);
3364 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3367 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3369 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
3370 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
3371 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
3372 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
3373 sizeof(struct smb2_fs_full_size_info
));
3375 copy_fs_info_to_kstatfs(info
, fsdata
);
3378 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3383 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
3384 u64 persistent_fid
, u64 volatile_fid
, int level
)
3386 struct smb2_query_info_rsp
*rsp
= NULL
;
3388 struct kvec rsp_iov
;
3390 int resp_buftype
, max_len
, min_len
;
3391 struct cifs_ses
*ses
= tcon
->ses
;
3392 unsigned int rsp_len
, offset
;
3395 if (level
== FS_DEVICE_INFORMATION
) {
3396 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3397 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3398 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
3399 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
3400 min_len
= MIN_FS_ATTR_INFO_SIZE
;
3401 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3402 max_len
= sizeof(struct smb3_fs_ss_info
);
3403 min_len
= sizeof(struct smb3_fs_ss_info
);
3405 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
3409 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
3410 persistent_fid
, volatile_fid
);
3414 if (encryption_required(tcon
))
3415 flags
|= CIFS_TRANSFORM_REQ
;
3417 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
3418 cifs_small_buf_release(iov
.iov_base
);
3420 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3423 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3425 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
3426 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
3427 rc
= validate_buf(offset
, rsp_len
, &rsp
->hdr
, min_len
);
3431 if (level
== FS_ATTRIBUTE_INFORMATION
)
3432 memcpy(&tcon
->fsAttrInfo
, 4 /* RFC1001 len */ + offset
3433 + (char *)&rsp
->hdr
, min_t(unsigned int,
3435 else if (level
== FS_DEVICE_INFORMATION
)
3436 memcpy(&tcon
->fsDevInfo
, 4 /* RFC1001 len */ + offset
3437 + (char *)&rsp
->hdr
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
3438 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3439 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
3440 (4 /* RFC1001 len */ + offset
+ (char *)&rsp
->hdr
);
3441 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
3442 tcon
->perf_sector_size
=
3443 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
3447 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3452 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
3453 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3454 const __u32 num_lock
, struct smb2_lock_element
*buf
)
3457 struct smb2_lock_req
*req
= NULL
;
3459 struct kvec rsp_iov
;
3462 int flags
= CIFS_NO_RESP
;
3464 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
3466 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
3470 if (encryption_required(tcon
))
3471 flags
|= CIFS_TRANSFORM_REQ
;
3473 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3474 req
->LockCount
= cpu_to_le16(num_lock
);
3476 req
->PersistentFileId
= persist_fid
;
3477 req
->VolatileFileId
= volatile_fid
;
3479 count
= num_lock
* sizeof(struct smb2_lock_element
);
3480 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
3482 iov
[0].iov_base
= (char *)req
;
3483 /* 4 for rfc1002 length field and count for all locks */
3484 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
3485 iov
[1].iov_base
= (char *)buf
;
3486 iov
[1].iov_len
= count
;
3488 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
3489 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, flags
,
3491 cifs_small_buf_release(req
);
3493 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
3494 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
3501 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
3502 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3503 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
3506 struct smb2_lock_element lock
;
3508 lock
.Offset
= cpu_to_le64(offset
);
3509 lock
.Length
= cpu_to_le64(length
);
3510 lock
.Flags
= cpu_to_le32(lock_flags
);
3511 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
3512 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
3514 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
3518 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3519 __u8
*lease_key
, const __le32 lease_state
)
3522 struct smb2_lease_ack
*req
= NULL
;
3523 int flags
= CIFS_OBREAK_OP
;
3525 cifs_dbg(FYI
, "SMB2_lease_break\n");
3526 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
3530 if (encryption_required(tcon
))
3531 flags
|= CIFS_TRANSFORM_REQ
;
3533 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
3534 req
->StructureSize
= cpu_to_le16(36);
3535 inc_rfc1001_len(req
, 12);
3537 memcpy(req
->LeaseKey
, lease_key
, 16);
3538 req
->LeaseState
= lease_state
;
3540 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, flags
);
3541 cifs_small_buf_release(req
);
3544 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3545 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);