4 * Copyright (C) International Business Machines Corp., 2009, 2013
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
9 * Contains the routines for constructing the SMB2 PDUs themselves
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
32 #include <linux/kernel.h>
33 #include <linux/vfs.h>
34 #include <linux/task_io_accounting_ops.h>
35 #include <linux/uaccess.h>
36 #include <linux/pagemap.h>
37 #include <linux/xattr.h>
41 #include "cifsproto.h"
42 #include "smb2proto.h"
43 #include "cifs_unicode.h"
44 #include "cifs_debug.h"
46 #include "smb2status.h"
49 #include "cifs_spnego.h"
52 * The following table defines the expected "StructureSize" of SMB2 requests
53 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
55 * Note that commands are defined in smb2pdu.h in le16 but the array below is
56 * indexed by command in host byte order.
58 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
59 /* SMB2_NEGOTIATE */ 36,
60 /* SMB2_SESSION_SETUP */ 25,
62 /* SMB2_TREE_CONNECT */ 9,
63 /* SMB2_TREE_DISCONNECT */ 4,
73 /* SMB2_QUERY_DIRECTORY */ 33,
74 /* SMB2_CHANGE_NOTIFY */ 32,
75 /* SMB2_QUERY_INFO */ 41,
76 /* SMB2_SET_INFO */ 33,
77 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
80 static int encryption_required(const struct cifs_tcon
*tcon
)
84 if ((tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
) ||
85 (tcon
->share_flags
& SHI1005_FLAGS_ENCRYPT_DATA
))
88 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
94 smb2_hdr_assemble(struct smb2_sync_hdr
*shdr
, __le16 smb2_cmd
,
95 const struct cifs_tcon
*tcon
)
97 shdr
->ProtocolId
= SMB2_PROTO_NUMBER
;
98 shdr
->StructureSize
= cpu_to_le16(64);
99 shdr
->Command
= smb2_cmd
;
100 if (tcon
&& tcon
->ses
&& tcon
->ses
->server
) {
101 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
103 spin_lock(&server
->req_lock
);
104 /* Request up to 2 credits but don't go over the limit. */
105 if (server
->credits
>= server
->max_credits
)
106 shdr
->CreditRequest
= cpu_to_le16(0);
108 shdr
->CreditRequest
= cpu_to_le16(
109 min_t(int, server
->max_credits
-
110 server
->credits
, 2));
111 spin_unlock(&server
->req_lock
);
113 shdr
->CreditRequest
= cpu_to_le16(2);
115 shdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
120 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
121 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
122 if ((tcon
->ses
) && (tcon
->ses
->server
) &&
123 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
124 shdr
->CreditCharge
= cpu_to_le16(1);
125 /* else CreditCharge MBZ */
127 shdr
->TreeId
= tcon
->tid
;
128 /* Uid is not converted */
130 shdr
->SessionId
= tcon
->ses
->Suid
;
133 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
134 * to pass the path on the Open SMB prefixed by \\server\share.
135 * Not sure when we would need to do the augmented path (if ever) and
136 * setting this flag breaks the SMB2 open operation since it is
137 * illegal to send an empty path name (without \\server\share prefix)
138 * when the DFS flag is set in the SMB open header. We could
139 * consider setting the flag on all operations other than open
140 * but it is safer to net set it for now.
142 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
143 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
145 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
&&
146 !encryption_required(tcon
))
147 shdr
->Flags
|= SMB2_FLAGS_SIGNED
;
153 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
156 struct nls_table
*nls_codepage
;
157 struct cifs_ses
*ses
;
158 struct TCP_Server_Info
*server
;
161 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
162 * check for tcp and smb session status done differently
163 * for those three - in the calling routine.
168 if (smb2_command
== SMB2_TREE_CONNECT
)
171 if (tcon
->tidStatus
== CifsExiting
) {
173 * only tree disconnect, open, and write,
174 * (and ulogoff which does not have tcon)
175 * are allowed as we start force umount.
177 if ((smb2_command
!= SMB2_WRITE
) &&
178 (smb2_command
!= SMB2_CREATE
) &&
179 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
180 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
185 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
186 (!tcon
->ses
->server
))
190 server
= ses
->server
;
193 * Give demultiplex thread up to 10 seconds to reconnect, should be
194 * greater than cifs socket timeout which is 7 seconds
196 while (server
->tcpStatus
== CifsNeedReconnect
) {
198 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
199 * here since they are implicitly done when session drops.
201 switch (smb2_command
) {
203 * BB Should we keep oplock break and add flush to exceptions?
205 case SMB2_TREE_DISCONNECT
:
208 case SMB2_OPLOCK_BREAK
:
212 wait_event_interruptible_timeout(server
->response_q
,
213 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
215 /* are we still trying to reconnect? */
216 if (server
->tcpStatus
!= CifsNeedReconnect
)
220 * on "soft" mounts we wait once. Hard mounts keep
221 * retrying until process is killed or server comes
225 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
230 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
233 nls_codepage
= load_nls_default();
236 * need to prevent multiple threads trying to simultaneously reconnect
237 * the same SMB session
239 mutex_lock(&tcon
->ses
->session_mutex
);
240 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
241 if (!rc
&& tcon
->ses
->need_reconnect
)
242 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
244 if (rc
|| !tcon
->need_reconnect
) {
245 mutex_unlock(&tcon
->ses
->session_mutex
);
249 cifs_mark_open_files_invalid(tcon
);
250 if (tcon
->use_persistent
)
251 tcon
->need_reopen_files
= true;
253 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
254 mutex_unlock(&tcon
->ses
->session_mutex
);
256 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
260 if (smb2_command
!= SMB2_INTERNAL_CMD
)
261 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
263 atomic_inc(&tconInfoReconnectCount
);
266 * Check if handle based operation so we know whether we can continue
267 * or not without returning to caller to reset file handle.
270 * BB Is flush done by server on drop of tcp session? Should we special
271 * case it and skip above?
273 switch (smb2_command
) {
279 case SMB2_QUERY_DIRECTORY
:
280 case SMB2_CHANGE_NOTIFY
:
281 case SMB2_QUERY_INFO
:
285 unload_nls(nls_codepage
);
290 fill_small_buf(__le16 smb2_command
, struct cifs_tcon
*tcon
, void *buf
,
291 unsigned int *total_len
)
293 struct smb2_sync_pdu
*spdu
= (struct smb2_sync_pdu
*)buf
;
294 /* lookup word count ie StructureSize from table */
295 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_command
)];
298 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
299 * largest operations (Create)
303 smb2_hdr_assemble(&spdu
->sync_hdr
, smb2_command
, tcon
);
304 spdu
->StructureSize2
= cpu_to_le16(parmsize
);
306 *total_len
= parmsize
+ sizeof(struct smb2_sync_hdr
);
309 /* init request without RFC1001 length at the beginning */
311 smb2_plain_req_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
312 void **request_buf
, unsigned int *total_len
)
315 struct smb2_sync_hdr
*shdr
;
317 rc
= smb2_reconnect(smb2_command
, tcon
);
321 /* BB eventually switch this to SMB2 specific small buf size */
322 *request_buf
= cifs_small_buf_get();
323 if (*request_buf
== NULL
) {
324 /* BB should we add a retry in here if not a writepage? */
328 shdr
= (struct smb2_sync_hdr
*)(*request_buf
);
330 fill_small_buf(smb2_command
, tcon
, shdr
, total_len
);
333 #ifdef CONFIG_CIFS_STATS2
334 uint16_t com_code
= le16_to_cpu(smb2_command
);
336 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
338 cifs_stats_inc(&tcon
->num_smbs_sent
);
345 * Allocate and return pointer to an SMB request hdr, and set basic
346 * SMB information in the SMB header. If the return code is zero, this
347 * function must have filled in request_buf pointer. The returned buffer
348 * has RFC1001 length at the beginning.
351 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
355 unsigned int total_len
;
356 struct smb2_pdu
*pdu
;
358 rc
= smb2_reconnect(smb2_command
, tcon
);
362 /* BB eventually switch this to SMB2 specific small buf size */
363 *request_buf
= cifs_small_buf_get();
364 if (*request_buf
== NULL
) {
365 /* BB should we add a retry in here if not a writepage? */
369 pdu
= (struct smb2_pdu
*)(*request_buf
);
371 fill_small_buf(smb2_command
, tcon
, get_sync_hdr(pdu
), &total_len
);
373 /* Note this is only network field converted to big endian */
374 pdu
->hdr
.smb2_buf_length
= cpu_to_be32(total_len
);
377 #ifdef CONFIG_CIFS_STATS2
378 uint16_t com_code
= le16_to_cpu(smb2_command
);
379 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
381 cifs_stats_inc(&tcon
->num_smbs_sent
);
387 #ifdef CONFIG_CIFS_SMB311
388 /* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
389 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
392 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
393 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
396 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
398 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
399 pneg_ctxt
->DataLength
= cpu_to_le16(38);
400 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
401 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
402 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
403 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
407 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
409 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
410 pneg_ctxt
->DataLength
= cpu_to_le16(6);
411 pneg_ctxt
->CipherCount
= cpu_to_le16(2);
412 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_GCM
;
413 pneg_ctxt
->Ciphers
[1] = SMB2_ENCRYPTION_AES128_CCM
;
417 assemble_neg_contexts(struct smb2_negotiate_req
*req
)
420 /* +4 is to account for the RFC1001 len field */
421 char *pneg_ctxt
= (char *)req
+ OFFSET_OF_NEG_CONTEXT
+ 4;
423 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
424 /* Add 2 to size to round to 8 byte boundary */
425 pneg_ctxt
+= 2 + sizeof(struct smb2_preauth_neg_context
);
426 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
427 req
->NegotiateContextOffset
= cpu_to_le32(OFFSET_OF_NEG_CONTEXT
);
428 req
->NegotiateContextCount
= cpu_to_le16(2);
429 inc_rfc1001_len(req
, 4 + sizeof(struct smb2_preauth_neg_context
) + 2
430 + sizeof(struct smb2_encryption_neg_context
)); /* calculate hash */
433 static void assemble_neg_contexts(struct smb2_negotiate_req
*req
)
441 * SMB2 Worker functions follow:
443 * The general structure of the worker functions is:
444 * 1) Call smb2_init (assembles SMB2 header)
445 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
446 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
447 * 4) Decode SMB2 command specific fields in the fixed length area
448 * 5) Decode variable length data area (if any for this SMB2 command type)
449 * 6) Call free smb buffer
455 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
457 struct smb2_negotiate_req
*req
;
458 struct smb2_negotiate_rsp
*rsp
;
463 struct TCP_Server_Info
*server
= ses
->server
;
464 int blob_offset
, blob_length
;
466 int flags
= CIFS_NEG_OP
;
468 cifs_dbg(FYI
, "Negotiate protocol\n");
471 WARN(1, "%s: server is NULL!\n", __func__
);
475 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
479 req
->hdr
.sync_hdr
.SessionId
= 0;
481 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
483 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
484 inc_rfc1001_len(req
, 2);
486 /* only one of SMB2 signing flags may be set in SMB2 request */
488 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
489 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
490 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
492 req
->SecurityMode
= 0;
494 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
496 /* ClientGUID must be zero for SMB2.02 dialect */
497 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
498 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
500 memcpy(req
->ClientGUID
, server
->client_guid
,
501 SMB2_CLIENT_GUID_SIZE
);
502 if (ses
->server
->vals
->protocol_id
== SMB311_PROT_ID
)
503 assemble_neg_contexts(req
);
505 iov
[0].iov_base
= (char *)req
;
506 /* 4 for rfc1002 length field */
507 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
509 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
510 cifs_small_buf_release(req
);
511 rsp
= (struct smb2_negotiate_rsp
*)rsp_iov
.iov_base
;
513 * No tcon so can't do
514 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
519 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
521 /* BB we may eventually want to match the negotiated vs. requested
522 dialect, even though we are only requesting one at a time */
523 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
524 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
525 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
526 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
527 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
528 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
529 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
530 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
531 #ifdef CONFIG_CIFS_SMB311
532 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
533 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
536 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
537 le16_to_cpu(rsp
->DialectRevision
));
541 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
543 /* SMB2 only has an extended negflavor */
544 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
545 /* set it to the maximum buffer size value we can send with 1 credit */
546 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
547 SMB2_MAX_BUFFER_SIZE
);
548 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
549 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
550 /* BB Do we need to validate the SecurityMode? */
551 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
552 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
554 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
556 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
559 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
561 * ses->sectype = RawNTLMSSP;
562 * but for time being this is our only auth choice so doesn't matter.
563 * We just found a server which sets blob length to zero expecting raw.
565 if (blob_length
== 0)
566 cifs_dbg(FYI
, "missing security blob on negprot\n");
568 rc
= cifs_enable_signing(server
, ses
->sign
);
572 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
579 free_rsp_buf(resp_buftype
, rsp
);
583 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
586 struct validate_negotiate_info_req vneg_inbuf
;
587 struct validate_negotiate_info_rsp
*pneg_rsp
;
590 cifs_dbg(FYI
, "validate negotiate\n");
593 * validation ioctl must be signed, so no point sending this if we
594 * can not sign it. We could eventually change this to selectively
595 * sign just this, the first and only signed request on a connection.
596 * This is good enough for now since a user who wants better security
597 * would also enable signing on the mount. Having validation of
598 * negotiate info for signed connections helps reduce attack vectors
600 if (tcon
->ses
->server
->sign
== false)
601 return 0; /* validation requires signing */
603 vneg_inbuf
.Capabilities
=
604 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
605 memcpy(vneg_inbuf
.Guid
, tcon
->ses
->server
->client_guid
,
606 SMB2_CLIENT_GUID_SIZE
);
609 vneg_inbuf
.SecurityMode
=
610 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
611 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
612 vneg_inbuf
.SecurityMode
=
613 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
615 vneg_inbuf
.SecurityMode
= 0;
617 vneg_inbuf
.DialectCount
= cpu_to_le16(1);
618 vneg_inbuf
.Dialects
[0] =
619 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
621 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
622 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
624 (char *)&vneg_inbuf
, sizeof(struct validate_negotiate_info_req
),
625 (char **)&pneg_rsp
, &rsplen
);
628 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
632 if (rsplen
!= sizeof(struct validate_negotiate_info_rsp
)) {
633 cifs_dbg(VFS
, "invalid size of protocol negotiate response\n");
637 /* check validate negotiate info response matches what we got earlier */
638 if (pneg_rsp
->Dialect
!=
639 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
))
642 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
645 /* do not validate server guid because not saved at negprot time yet */
647 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
648 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
651 /* validate negotiate successful */
652 cifs_dbg(FYI
, "validate negotiate info successful\n");
656 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
660 struct SMB2_sess_data
{
662 struct cifs_ses
*ses
;
663 struct nls_table
*nls_cp
;
664 void (*func
)(struct SMB2_sess_data
*);
666 u64 previous_session
;
668 /* we will send the SMB in three pieces:
669 * a fixed length beginning part, an optional
670 * SPNEGO blob (which can be zero length), and a
671 * last part which will include the strings
672 * and rest of bcc area. This allows us to avoid
673 * a large buffer 17K allocation
680 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
683 struct cifs_ses
*ses
= sess_data
->ses
;
684 struct smb2_sess_setup_req
*req
;
685 struct TCP_Server_Info
*server
= ses
->server
;
687 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
691 /* First session, not a reauthenticate */
692 req
->hdr
.sync_hdr
.SessionId
= 0;
694 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
695 req
->PreviousSessionId
= sess_data
->previous_session
;
697 req
->Flags
= 0; /* MBZ */
698 /* to enable echos and oplocks */
699 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(3);
701 /* only one of SMB2 signing flags may be set in SMB2 request */
703 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
704 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
705 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
707 req
->SecurityMode
= 0;
709 req
->Capabilities
= 0;
710 req
->Channel
= 0; /* MBZ */
712 sess_data
->iov
[0].iov_base
= (char *)req
;
713 /* 4 for rfc1002 length field and 1 for pad */
714 sess_data
->iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
716 * This variable will be used to clear the buffer
717 * allocated above in case of any error in the calling function.
719 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
725 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
727 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
728 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
732 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
735 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
736 struct kvec rsp_iov
= { NULL
, 0 };
738 /* Testing shows that buffer offset must be at location of Buffer[0] */
739 req
->SecurityBufferOffset
=
740 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
741 1 /* pad */ - 4 /* rfc1001 len */);
742 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
744 inc_rfc1001_len(req
, sess_data
->iov
[1].iov_len
- 1 /* pad */);
746 /* BB add code to build os and lm fields */
748 rc
= SendReceive2(sess_data
->xid
, sess_data
->ses
,
750 &sess_data
->buf0_type
,
751 CIFS_LOG_ERROR
| CIFS_NEG_OP
, &rsp_iov
);
752 cifs_small_buf_release(sess_data
->iov
[0].iov_base
);
753 memcpy(&sess_data
->iov
[0], &rsp_iov
, sizeof(struct kvec
));
759 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
762 struct cifs_ses
*ses
= sess_data
->ses
;
764 mutex_lock(&ses
->server
->srv_mutex
);
765 if (ses
->server
->ops
->generate_signingkey
) {
766 rc
= ses
->server
->ops
->generate_signingkey(ses
);
769 "SMB3 session key generation failed\n");
770 mutex_unlock(&ses
->server
->srv_mutex
);
774 if (!ses
->server
->session_estab
) {
775 ses
->server
->sequence_number
= 0x2;
776 ses
->server
->session_estab
= true;
778 mutex_unlock(&ses
->server
->srv_mutex
);
780 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
781 spin_lock(&GlobalMid_Lock
);
782 ses
->status
= CifsGood
;
783 ses
->need_reconnect
= false;
784 spin_unlock(&GlobalMid_Lock
);
788 #ifdef CONFIG_CIFS_UPCALL
790 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
793 struct cifs_ses
*ses
= sess_data
->ses
;
794 struct cifs_spnego_msg
*msg
;
795 struct key
*spnego_key
= NULL
;
796 struct smb2_sess_setup_rsp
*rsp
= NULL
;
798 rc
= SMB2_sess_alloc_buffer(sess_data
);
802 spnego_key
= cifs_get_spnego_key(ses
);
803 if (IS_ERR(spnego_key
)) {
804 rc
= PTR_ERR(spnego_key
);
809 msg
= spnego_key
->payload
.data
[0];
811 * check version field to make sure that cifs.upcall is
812 * sending us a response in an expected form
814 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
816 "bad cifs.upcall version. Expected %d got %d",
817 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
819 goto out_put_spnego_key
;
822 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
824 if (!ses
->auth_key
.response
) {
826 "Kerberos can't allocate (%u bytes) memory",
829 goto out_put_spnego_key
;
831 ses
->auth_key
.len
= msg
->sesskey_len
;
833 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
834 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
836 rc
= SMB2_sess_sendreceive(sess_data
);
838 goto out_put_spnego_key
;
840 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
841 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
843 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
845 rc
= SMB2_sess_establish_session(sess_data
);
847 key_invalidate(spnego_key
);
850 sess_data
->result
= rc
;
851 sess_data
->func
= NULL
;
852 SMB2_sess_free_buffer(sess_data
);
856 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
858 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
859 sess_data
->result
= -EOPNOTSUPP
;
860 sess_data
->func
= NULL
;
865 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
868 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
871 struct cifs_ses
*ses
= sess_data
->ses
;
872 struct smb2_sess_setup_rsp
*rsp
= NULL
;
873 char *ntlmssp_blob
= NULL
;
874 bool use_spnego
= false; /* else use raw ntlmssp */
878 * If memory allocation is successful, caller of this function
881 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
886 ses
->ntlmssp
->sesskey_per_smbsess
= true;
888 rc
= SMB2_sess_alloc_buffer(sess_data
);
892 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
894 if (ntlmssp_blob
== NULL
) {
899 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
901 /* BB eventually need to add this */
902 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
906 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
907 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
909 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
910 sess_data
->iov
[1].iov_len
= blob_length
;
912 rc
= SMB2_sess_sendreceive(sess_data
);
913 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
915 /* If true, rc here is expected and not an error */
916 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
917 rsp
->hdr
.sync_hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
923 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
924 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
925 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
926 le16_to_cpu(rsp
->SecurityBufferOffset
));
930 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
931 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
935 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
938 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
939 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
943 SMB2_sess_free_buffer(sess_data
);
945 sess_data
->result
= 0;
946 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
952 sess_data
->result
= rc
;
953 sess_data
->func
= NULL
;
957 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
960 struct cifs_ses
*ses
= sess_data
->ses
;
961 struct smb2_sess_setup_req
*req
;
962 struct smb2_sess_setup_rsp
*rsp
= NULL
;
963 unsigned char *ntlmssp_blob
= NULL
;
964 bool use_spnego
= false; /* else use raw ntlmssp */
967 rc
= SMB2_sess_alloc_buffer(sess_data
);
971 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
972 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
974 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
, ses
,
977 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
982 /* BB eventually need to add this */
983 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
987 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
988 sess_data
->iov
[1].iov_len
= blob_length
;
990 rc
= SMB2_sess_sendreceive(sess_data
);
994 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
996 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
997 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
999 rc
= SMB2_sess_establish_session(sess_data
);
1001 kfree(ntlmssp_blob
);
1002 SMB2_sess_free_buffer(sess_data
);
1003 kfree(ses
->ntlmssp
);
1004 ses
->ntlmssp
= NULL
;
1005 sess_data
->result
= rc
;
1006 sess_data
->func
= NULL
;
1010 SMB2_select_sec(struct cifs_ses
*ses
, struct SMB2_sess_data
*sess_data
)
1012 if (ses
->sectype
!= Kerberos
&& ses
->sectype
!= RawNTLMSSP
)
1013 ses
->sectype
= RawNTLMSSP
;
1015 switch (ses
->sectype
) {
1017 sess_data
->func
= SMB2_auth_kerberos
;
1020 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
1023 cifs_dbg(VFS
, "secType %d not supported!\n", ses
->sectype
);
1031 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
1032 const struct nls_table
*nls_cp
)
1035 struct TCP_Server_Info
*server
= ses
->server
;
1036 struct SMB2_sess_data
*sess_data
;
1038 cifs_dbg(FYI
, "Session Setup\n");
1041 WARN(1, "%s: server is NULL!\n", __func__
);
1045 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
1049 rc
= SMB2_select_sec(ses
, sess_data
);
1052 sess_data
->xid
= xid
;
1053 sess_data
->ses
= ses
;
1054 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1055 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1057 while (sess_data
->func
)
1058 sess_data
->func(sess_data
);
1060 rc
= sess_data
->result
;
1067 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1069 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1071 struct TCP_Server_Info
*server
;
1074 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1076 if (ses
&& (ses
->server
))
1077 server
= ses
->server
;
1081 /* no need to send SMB logoff if uid already closed due to reconnect */
1082 if (ses
->need_reconnect
)
1083 goto smb2_session_already_dead
;
1085 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
1089 /* since no tcon, smb2_init can not do this, so do here */
1090 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1092 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
1093 flags
|= CIFS_TRANSFORM_REQ
;
1094 else if (server
->sign
)
1095 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1097 rc
= SendReceiveNoRsp(xid
, ses
, (char *) req
, flags
);
1098 cifs_small_buf_release(req
);
1100 * No tcon so can't do
1101 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1104 smb2_session_already_dead
:
1108 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1110 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1113 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1115 /* These are similar values to what Windows uses */
1116 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1118 tcon
->max_chunks
= 256;
1119 tcon
->max_bytes_chunk
= 1048576;
1120 tcon
->max_bytes_copy
= 16777216;
1124 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1125 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1127 struct smb2_tree_connect_req
*req
;
1128 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1130 struct kvec rsp_iov
;
1134 struct TCP_Server_Info
*server
;
1135 __le16
*unc_path
= NULL
;
1138 cifs_dbg(FYI
, "TCON\n");
1140 if ((ses
->server
) && tree
)
1141 server
= ses
->server
;
1145 if (tcon
&& tcon
->bad_network_name
)
1148 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1149 if (unc_path
== NULL
)
1152 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1154 if (unc_path_len
< 2) {
1159 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
1166 if ((ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
))
1167 flags
|= CIFS_TRANSFORM_REQ
;
1169 /* since no tcon, smb2_init can not do this, so do here */
1170 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1171 if (ses
->server
->sign
)
1172 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1173 } else if (encryption_required(tcon
))
1174 flags
|= CIFS_TRANSFORM_REQ
;
1176 iov
[0].iov_base
= (char *)req
;
1177 /* 4 for rfc1002 length field and 1 for pad */
1178 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1180 /* Testing shows that buffer offset must be at location of Buffer[0] */
1181 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1182 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1183 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1184 iov
[1].iov_base
= unc_path
;
1185 iov
[1].iov_len
= unc_path_len
;
1187 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
1189 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, flags
, &rsp_iov
);
1190 cifs_small_buf_release(req
);
1191 rsp
= (struct smb2_tree_connect_rsp
*)rsp_iov
.iov_base
;
1195 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1196 tcon
->need_reconnect
= true;
1198 goto tcon_error_exit
;
1202 ses
->ipc_tid
= rsp
->hdr
.sync_hdr
.TreeId
;
1206 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
1207 cifs_dbg(FYI
, "connection to disk share\n");
1208 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
1210 cifs_dbg(FYI
, "connection to pipe share\n");
1211 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
1213 cifs_dbg(FYI
, "connection to printer\n");
1215 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1217 goto tcon_error_exit
;
1220 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1221 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1222 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1223 tcon
->tidStatus
= CifsGood
;
1224 tcon
->need_reconnect
= false;
1225 tcon
->tid
= rsp
->hdr
.sync_hdr
.TreeId
;
1226 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1228 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1229 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1230 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1233 !(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
1234 cifs_dbg(VFS
, "Encryption is requested but not supported\n");
1236 init_copy_chunk_defaults(tcon
);
1237 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1238 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1240 free_rsp_buf(resp_buftype
, rsp
);
1245 if (rsp
->hdr
.sync_hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1246 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1248 tcon
->bad_network_name
= true;
1254 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1256 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1258 struct TCP_Server_Info
*server
;
1259 struct cifs_ses
*ses
= tcon
->ses
;
1262 cifs_dbg(FYI
, "Tree Disconnect\n");
1264 if (ses
&& (ses
->server
))
1265 server
= ses
->server
;
1269 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1272 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
1276 if (encryption_required(tcon
))
1277 flags
|= CIFS_TRANSFORM_REQ
;
1279 rc
= SendReceiveNoRsp(xid
, ses
, (char *)req
, flags
);
1280 cifs_small_buf_release(req
);
1282 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1288 static struct create_durable
*
1289 create_durable_buf(void)
1291 struct create_durable
*buf
;
1293 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1297 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1298 (struct create_durable
, Data
));
1299 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1300 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1301 (struct create_durable
, Name
));
1302 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1303 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1311 static struct create_durable
*
1312 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1314 struct create_durable
*buf
;
1316 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1320 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1321 (struct create_durable
, Data
));
1322 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1323 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1324 (struct create_durable
, Name
));
1325 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1326 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1327 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1328 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1337 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1338 unsigned int *epoch
)
1341 struct create_context
*cc
;
1343 unsigned int remaining
;
1346 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
1347 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
1348 cc
= (struct create_context
*)data_offset
;
1349 while (remaining
>= sizeof(struct create_context
)) {
1350 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1351 if (le16_to_cpu(cc
->NameLength
) == 4 &&
1352 strncmp(name
, "RqLs", 4) == 0)
1353 return server
->ops
->parse_lease_buf(cc
, epoch
);
1355 next
= le32_to_cpu(cc
->Next
);
1359 cc
= (struct create_context
*)((char *)cc
+ next
);
1366 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1367 unsigned int *num_iovec
, __u8
*oplock
)
1369 struct smb2_create_req
*req
= iov
[0].iov_base
;
1370 unsigned int num
= *num_iovec
;
1372 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1373 if (iov
[num
].iov_base
== NULL
)
1375 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1376 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1377 if (!req
->CreateContextsOffset
)
1378 req
->CreateContextsOffset
= cpu_to_le32(
1379 sizeof(struct smb2_create_req
) - 4 +
1380 iov
[num
- 1].iov_len
);
1381 le32_add_cpu(&req
->CreateContextsLength
,
1382 server
->vals
->create_lease_size
);
1383 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
1384 *num_iovec
= num
+ 1;
1388 static struct create_durable_v2
*
1389 create_durable_v2_buf(struct cifs_fid
*pfid
)
1391 struct create_durable_v2
*buf
;
1393 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1397 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1398 (struct create_durable_v2
, dcontext
));
1399 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1400 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1401 (struct create_durable_v2
, Name
));
1402 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1404 buf
->dcontext
.Timeout
= 0; /* Should this be configurable by workload */
1405 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1406 generate_random_uuid(buf
->dcontext
.CreateGuid
);
1407 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1409 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1417 static struct create_durable_handle_reconnect_v2
*
1418 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1420 struct create_durable_handle_reconnect_v2
*buf
;
1422 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1427 buf
->ccontext
.DataOffset
=
1428 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1430 buf
->ccontext
.DataLength
=
1431 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1432 buf
->ccontext
.NameOffset
=
1433 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1435 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1437 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1438 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1439 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1440 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1442 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1451 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1452 struct cifs_open_parms
*oparms
)
1454 struct smb2_create_req
*req
= iov
[0].iov_base
;
1455 unsigned int num
= *num_iovec
;
1457 iov
[num
].iov_base
= create_durable_v2_buf(oparms
->fid
);
1458 if (iov
[num
].iov_base
== NULL
)
1460 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1461 if (!req
->CreateContextsOffset
)
1462 req
->CreateContextsOffset
=
1463 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1465 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1466 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable_v2
));
1467 *num_iovec
= num
+ 1;
1472 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1473 struct cifs_open_parms
*oparms
)
1475 struct smb2_create_req
*req
= iov
[0].iov_base
;
1476 unsigned int num
= *num_iovec
;
1478 /* indicate that we don't need to relock the file */
1479 oparms
->reconnect
= false;
1481 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1482 if (iov
[num
].iov_base
== NULL
)
1484 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1485 if (!req
->CreateContextsOffset
)
1486 req
->CreateContextsOffset
=
1487 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1489 le32_add_cpu(&req
->CreateContextsLength
,
1490 sizeof(struct create_durable_handle_reconnect_v2
));
1491 inc_rfc1001_len(&req
->hdr
,
1492 sizeof(struct create_durable_handle_reconnect_v2
));
1493 *num_iovec
= num
+ 1;
1498 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1499 struct cifs_open_parms
*oparms
, bool use_persistent
)
1501 struct smb2_create_req
*req
= iov
[0].iov_base
;
1502 unsigned int num
= *num_iovec
;
1504 if (use_persistent
) {
1505 if (oparms
->reconnect
)
1506 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1509 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1512 if (oparms
->reconnect
) {
1513 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1514 /* indicate that we don't need to relock the file */
1515 oparms
->reconnect
= false;
1517 iov
[num
].iov_base
= create_durable_buf();
1518 if (iov
[num
].iov_base
== NULL
)
1520 iov
[num
].iov_len
= sizeof(struct create_durable
);
1521 if (!req
->CreateContextsOffset
)
1522 req
->CreateContextsOffset
=
1523 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1525 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1526 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
1527 *num_iovec
= num
+ 1;
1532 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1533 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1534 struct smb2_err_rsp
**err_buf
)
1536 struct smb2_create_req
*req
;
1537 struct smb2_create_rsp
*rsp
;
1538 struct TCP_Server_Info
*server
;
1539 struct cifs_tcon
*tcon
= oparms
->tcon
;
1540 struct cifs_ses
*ses
= tcon
->ses
;
1542 struct kvec rsp_iov
;
1545 __le16
*copy_path
= NULL
;
1548 unsigned int n_iov
= 2;
1549 __u32 file_attributes
= 0;
1550 char *dhc_buf
= NULL
, *lc_buf
= NULL
;
1553 cifs_dbg(FYI
, "create/open\n");
1555 if (ses
&& (ses
->server
))
1556 server
= ses
->server
;
1560 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1564 if (encryption_required(tcon
))
1565 flags
|= CIFS_TRANSFORM_REQ
;
1567 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1568 file_attributes
|= ATTR_READONLY
;
1569 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
1570 file_attributes
|= ATTR_SYSTEM
;
1572 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1573 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1574 /* File attributes ignored on open (used in create though) */
1575 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1576 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1577 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1578 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1579 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1580 /* do not count rfc1001 len field */
1581 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
1583 iov
[0].iov_base
= (char *)req
;
1584 /* 4 for rfc1002 length field */
1585 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1587 /* MUST set path len (NameLength) to 0 opening root of share */
1588 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1589 /* -1 since last byte is buf[0] which is sent below (path) */
1591 if (uni_path_len
% 8 != 0) {
1592 copy_size
= uni_path_len
/ 8 * 8;
1593 if (copy_size
< uni_path_len
)
1596 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1599 memcpy((char *)copy_path
, (const char *)path
,
1601 uni_path_len
= copy_size
;
1605 iov
[1].iov_len
= uni_path_len
;
1606 iov
[1].iov_base
= path
;
1607 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1608 inc_rfc1001_len(req
, uni_path_len
- 1);
1610 if (!server
->oplocks
)
1611 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1613 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1614 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1615 req
->RequestedOplockLevel
= *oplock
;
1617 rc
= add_lease_context(server
, iov
, &n_iov
, oplock
);
1619 cifs_small_buf_release(req
);
1623 lc_buf
= iov
[n_iov
-1].iov_base
;
1626 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1627 /* need to set Next field of lease context if we request it */
1628 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
1629 struct create_context
*ccontext
=
1630 (struct create_context
*)iov
[n_iov
-1].iov_base
;
1632 cpu_to_le32(server
->vals
->create_lease_size
);
1635 rc
= add_durable_context(iov
, &n_iov
, oparms
,
1636 tcon
->use_persistent
);
1638 cifs_small_buf_release(req
);
1643 dhc_buf
= iov
[n_iov
-1].iov_base
;
1646 rc
= SendReceive2(xid
, ses
, iov
, n_iov
, &resp_buftype
, flags
, &rsp_iov
);
1647 cifs_small_buf_release(req
);
1648 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
1651 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1653 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1658 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1659 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1662 memcpy(buf
, &rsp
->CreationTime
, 32);
1663 buf
->AllocationSize
= rsp
->AllocationSize
;
1664 buf
->EndOfFile
= rsp
->EndofFile
;
1665 buf
->Attributes
= rsp
->FileAttributes
;
1666 buf
->NumberOfLinks
= cpu_to_le32(1);
1667 buf
->DeletePending
= 0;
1670 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1671 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1673 *oplock
= rsp
->OplockLevel
;
1678 free_rsp_buf(resp_buftype
, rsp
);
1683 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1686 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1687 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, bool use_ipc
,
1688 char *in_data
, u32 indatalen
,
1689 char **out_data
, u32
*plen
/* returned data len */)
1691 struct smb2_ioctl_req
*req
;
1692 struct smb2_ioctl_rsp
*rsp
;
1693 struct smb2_sync_hdr
*shdr
;
1694 struct TCP_Server_Info
*server
;
1695 struct cifs_ses
*ses
;
1697 struct kvec rsp_iov
;
1703 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1705 if (out_data
!= NULL
)
1708 /* zero out returned data len, in case of error */
1717 if (ses
&& (ses
->server
))
1718 server
= ses
->server
;
1722 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1727 if (ses
->ipc_tid
== 0) {
1728 cifs_small_buf_release(req
);
1732 cifs_dbg(FYI
, "replacing tid 0x%x with IPC tid 0x%x\n",
1733 req
->hdr
.sync_hdr
.TreeId
, ses
->ipc_tid
);
1734 req
->hdr
.sync_hdr
.TreeId
= ses
->ipc_tid
;
1736 if (encryption_required(tcon
))
1737 flags
|= CIFS_TRANSFORM_REQ
;
1739 req
->CtlCode
= cpu_to_le32(opcode
);
1740 req
->PersistentFileId
= persistent_fid
;
1741 req
->VolatileFileId
= volatile_fid
;
1744 req
->InputCount
= cpu_to_le32(indatalen
);
1745 /* do not set InputOffset if no input data */
1747 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1748 iov
[1].iov_base
= in_data
;
1749 iov
[1].iov_len
= indatalen
;
1754 req
->OutputOffset
= 0;
1755 req
->OutputCount
= 0; /* MBZ */
1758 * Could increase MaxOutputResponse, but that would require more
1759 * than one credit. Windows typically sets this smaller, but for some
1760 * ioctls it may be useful to allow server to send more. No point
1761 * limiting what the server can send as long as fits in one credit
1763 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1766 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1770 iov
[0].iov_base
= (char *)req
;
1773 * If no input data, the size of ioctl struct in
1774 * protocol spec still includes a 1 byte data buffer,
1775 * but if input data passed to ioctl, we do not
1776 * want to double count this, so we do not send
1777 * the dummy one byte of data in iovec[0] if sending
1778 * input data (in iovec[1]). We also must add 4 bytes
1779 * in first iovec to allow for rfc1002 length field.
1783 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1784 inc_rfc1001_len(req
, indatalen
- 1);
1786 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1789 rc
= SendReceive2(xid
, ses
, iov
, n_iov
, &resp_buftype
, flags
, &rsp_iov
);
1790 cifs_small_buf_release(req
);
1791 rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
.iov_base
;
1793 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
1794 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1796 } else if (rc
== -EINVAL
) {
1797 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
1798 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
1799 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1804 /* check if caller wants to look at return data or just return rc */
1805 if ((plen
== NULL
) || (out_data
== NULL
))
1808 *plen
= le32_to_cpu(rsp
->OutputCount
);
1810 /* We check for obvious errors in the output buffer length and offset */
1812 goto ioctl_exit
; /* server returned no data */
1813 else if (*plen
> 0xFF00) {
1814 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1820 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1821 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1822 le32_to_cpu(rsp
->OutputOffset
));
1828 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1829 if (*out_data
== NULL
) {
1834 shdr
= get_sync_hdr(rsp
);
1835 memcpy(*out_data
, (char *)shdr
+ le32_to_cpu(rsp
->OutputOffset
), *plen
);
1837 free_rsp_buf(resp_buftype
, rsp
);
1842 * Individual callers to ioctl worker function follow
1846 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
1847 u64 persistent_fid
, u64 volatile_fid
)
1850 struct compress_ioctl fsctl_input
;
1851 char *ret_data
= NULL
;
1853 fsctl_input
.CompressionState
=
1854 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
1856 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
1857 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
1858 false /* use_ipc */,
1859 (char *)&fsctl_input
/* data input */,
1860 2 /* in data len */, &ret_data
/* out data */, NULL
);
1862 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
1868 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1869 u64 persistent_fid
, u64 volatile_fid
)
1871 struct smb2_close_req
*req
;
1872 struct smb2_close_rsp
*rsp
;
1873 struct TCP_Server_Info
*server
;
1874 struct cifs_ses
*ses
= tcon
->ses
;
1876 struct kvec rsp_iov
;
1881 cifs_dbg(FYI
, "Close\n");
1883 if (ses
&& (ses
->server
))
1884 server
= ses
->server
;
1888 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1892 if (encryption_required(tcon
))
1893 flags
|= CIFS_TRANSFORM_REQ
;
1895 req
->PersistentFileId
= persistent_fid
;
1896 req
->VolatileFileId
= volatile_fid
;
1898 iov
[0].iov_base
= (char *)req
;
1899 /* 4 for rfc1002 length field */
1900 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1902 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
1903 cifs_small_buf_release(req
);
1904 rsp
= (struct smb2_close_rsp
*)rsp_iov
.iov_base
;
1907 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1911 /* BB FIXME - decode close response, update inode for caching */
1914 free_rsp_buf(resp_buftype
, rsp
);
1919 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1920 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1923 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1924 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1925 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1926 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1929 if (buffer_length
< min_buf_size
) {
1930 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1931 buffer_length
, min_buf_size
);
1935 /* check if beyond RFC1001 maximum length */
1936 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1937 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1938 buffer_length
, smb_len
);
1942 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1943 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1951 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1952 * Caller must free buffer.
1955 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1956 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1960 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1966 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1970 memcpy(data
, begin_of_buf
, buffer_length
);
1976 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1977 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1978 size_t output_len
, size_t min_len
, void *data
)
1980 struct smb2_query_info_req
*req
;
1981 struct smb2_query_info_rsp
*rsp
= NULL
;
1983 struct kvec rsp_iov
;
1986 struct TCP_Server_Info
*server
;
1987 struct cifs_ses
*ses
= tcon
->ses
;
1990 cifs_dbg(FYI
, "Query Info\n");
1992 if (ses
&& (ses
->server
))
1993 server
= ses
->server
;
1997 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2001 if (encryption_required(tcon
))
2002 flags
|= CIFS_TRANSFORM_REQ
;
2004 req
->InfoType
= SMB2_O_INFO_FILE
;
2005 req
->FileInfoClass
= info_class
;
2006 req
->PersistentFileId
= persistent_fid
;
2007 req
->VolatileFileId
= volatile_fid
;
2008 /* 4 for rfc1002 length field and 1 for Buffer */
2009 req
->InputBufferOffset
=
2010 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2011 req
->OutputBufferLength
= cpu_to_le32(output_len
);
2013 iov
[0].iov_base
= (char *)req
;
2014 /* 4 for rfc1002 length field */
2015 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2017 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2018 cifs_small_buf_release(req
);
2019 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
2022 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2026 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2027 le32_to_cpu(rsp
->OutputBufferLength
),
2028 &rsp
->hdr
, min_len
, data
);
2031 free_rsp_buf(resp_buftype
, rsp
);
2036 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2037 u64 persistent_fid
, u64 volatile_fid
,
2038 struct smb2_file_all_info
*data
)
2040 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2041 FILE_ALL_INFORMATION
,
2042 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
2043 sizeof(struct smb2_file_all_info
), data
);
2047 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
2048 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
2050 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2051 FILE_INTERNAL_INFORMATION
,
2052 sizeof(struct smb2_file_internal_info
),
2053 sizeof(struct smb2_file_internal_info
), uniqueid
);
2057 * This is a no-op for now. We're not really interested in the reply, but
2058 * rather in the fact that the server sent one and that server->lstrp
2061 * FIXME: maybe we should consider checking that the reply matches request?
2064 smb2_echo_callback(struct mid_q_entry
*mid
)
2066 struct TCP_Server_Info
*server
= mid
->callback_data
;
2067 struct smb2_echo_rsp
*rsp
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
2068 unsigned int credits_received
= 1;
2070 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
2071 credits_received
= le16_to_cpu(rsp
->hdr
.sync_hdr
.CreditRequest
);
2073 mutex_lock(&server
->srv_mutex
);
2074 DeleteMidQEntry(mid
);
2075 mutex_unlock(&server
->srv_mutex
);
2076 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
2079 void smb2_reconnect_server(struct work_struct
*work
)
2081 struct TCP_Server_Info
*server
= container_of(work
,
2082 struct TCP_Server_Info
, reconnect
.work
);
2083 struct cifs_ses
*ses
;
2084 struct cifs_tcon
*tcon
, *tcon2
;
2085 struct list_head tmp_list
;
2086 int tcon_exist
= false;
2088 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2089 mutex_lock(&server
->reconnect_mutex
);
2091 INIT_LIST_HEAD(&tmp_list
);
2092 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
2094 spin_lock(&cifs_tcp_ses_lock
);
2095 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
2096 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
2097 if (tcon
->need_reconnect
|| tcon
->need_reopen_files
) {
2099 list_add_tail(&tcon
->rlist
, &tmp_list
);
2105 * Get the reference to server struct to be sure that the last call of
2106 * cifs_put_tcon() in the loop below won't release the server pointer.
2109 server
->srv_count
++;
2111 spin_unlock(&cifs_tcp_ses_lock
);
2113 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
2114 if (!smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
))
2115 cifs_reopen_persistent_handles(tcon
);
2116 list_del_init(&tcon
->rlist
);
2117 cifs_put_tcon(tcon
);
2120 cifs_dbg(FYI
, "Reconnecting tcons finished\n");
2121 mutex_unlock(&server
->reconnect_mutex
);
2123 /* now we can safely release srv struct */
2125 cifs_put_tcp_session(server
, 1);
2129 SMB2_echo(struct TCP_Server_Info
*server
)
2131 struct smb2_echo_req
*req
;
2134 struct smb_rqst rqst
= { .rq_iov
= iov
,
2137 cifs_dbg(FYI
, "In echo request\n");
2139 if (server
->tcpStatus
== CifsNeedNegotiate
) {
2140 /* No need to send echo on newly established connections */
2141 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
2145 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
2149 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
2151 /* 4 for rfc1002 length field */
2153 iov
[0].iov_base
= (char *)req
;
2154 iov
[1].iov_len
= get_rfc1002_length(req
);
2155 iov
[1].iov_base
= (char *)req
+ 4;
2157 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, NULL
,
2158 server
, CIFS_ECHO_OP
);
2160 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
2162 cifs_small_buf_release(req
);
2167 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2170 struct smb2_flush_req
*req
;
2171 struct TCP_Server_Info
*server
;
2172 struct cifs_ses
*ses
= tcon
->ses
;
2174 struct kvec rsp_iov
;
2179 cifs_dbg(FYI
, "Flush\n");
2181 if (ses
&& (ses
->server
))
2182 server
= ses
->server
;
2186 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
2190 if (encryption_required(tcon
))
2191 flags
|= CIFS_TRANSFORM_REQ
;
2193 req
->PersistentFileId
= persistent_fid
;
2194 req
->VolatileFileId
= volatile_fid
;
2196 iov
[0].iov_base
= (char *)req
;
2197 /* 4 for rfc1002 length field */
2198 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2200 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2201 cifs_small_buf_release(req
);
2204 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
2206 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2211 * To form a chain of read requests, any read requests after the first should
2212 * have the end_of_chain boolean set to true.
2215 smb2_new_read_req(void **buf
, unsigned int *total_len
,
2216 struct cifs_io_parms
*io_parms
, unsigned int remaining_bytes
,
2220 struct smb2_read_plain_req
*req
= NULL
;
2221 struct smb2_sync_hdr
*shdr
;
2223 rc
= smb2_plain_req_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
,
2227 if (io_parms
->tcon
->ses
->server
== NULL
)
2228 return -ECONNABORTED
;
2230 shdr
= &req
->sync_hdr
;
2231 shdr
->ProcessId
= cpu_to_le32(io_parms
->pid
);
2233 req
->PersistentFileId
= io_parms
->persistent_fid
;
2234 req
->VolatileFileId
= io_parms
->volatile_fid
;
2235 req
->ReadChannelInfoOffset
= 0; /* reserved */
2236 req
->ReadChannelInfoLength
= 0; /* reserved */
2237 req
->Channel
= 0; /* reserved */
2238 req
->MinimumCount
= 0;
2239 req
->Length
= cpu_to_le32(io_parms
->length
);
2240 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2242 if (request_type
& CHAINED_REQUEST
) {
2243 if (!(request_type
& END_OF_CHAIN
)) {
2244 /* next 8-byte aligned request */
2245 *total_len
= DIV_ROUND_UP(*total_len
, 8) * 8;
2246 shdr
->NextCommand
= cpu_to_le32(*total_len
);
2247 } else /* END_OF_CHAIN */
2248 shdr
->NextCommand
= 0;
2249 if (request_type
& RELATED_REQUEST
) {
2250 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
2252 * Related requests use info from previous read request
2255 shdr
->SessionId
= 0xFFFFFFFF;
2256 shdr
->TreeId
= 0xFFFFFFFF;
2257 req
->PersistentFileId
= 0xFFFFFFFF;
2258 req
->VolatileFileId
= 0xFFFFFFFF;
2261 if (remaining_bytes
> io_parms
->length
)
2262 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
2264 req
->RemainingBytes
= 0;
2271 smb2_readv_callback(struct mid_q_entry
*mid
)
2273 struct cifs_readdata
*rdata
= mid
->callback_data
;
2274 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2275 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2276 struct smb2_sync_hdr
*shdr
=
2277 (struct smb2_sync_hdr
*)rdata
->iov
[1].iov_base
;
2278 unsigned int credits_received
= 1;
2279 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2281 .rq_pages
= rdata
->pages
,
2282 .rq_npages
= rdata
->nr_pages
,
2283 .rq_pagesz
= rdata
->pagesz
,
2284 .rq_tailsz
= rdata
->tailsz
};
2286 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2287 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
2290 switch (mid
->mid_state
) {
2291 case MID_RESPONSE_RECEIVED
:
2292 credits_received
= le16_to_cpu(shdr
->CreditRequest
);
2293 /* result already set, check signature */
2294 if (server
->sign
&& !mid
->decrypted
) {
2297 rc
= smb2_verify_signature(&rqst
, server
);
2299 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
2302 /* FIXME: should this be counted toward the initiating task? */
2303 task_io_account_read(rdata
->got_bytes
);
2304 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2306 case MID_REQUEST_SUBMITTED
:
2307 case MID_RETRY_NEEDED
:
2308 rdata
->result
= -EAGAIN
;
2309 if (server
->sign
&& rdata
->got_bytes
)
2310 /* reset bytes number since we can not check a sign */
2311 rdata
->got_bytes
= 0;
2312 /* FIXME: should this be counted toward the initiating task? */
2313 task_io_account_read(rdata
->got_bytes
);
2314 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2317 if (rdata
->result
!= -ENODATA
)
2318 rdata
->result
= -EIO
;
2322 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
2324 queue_work(cifsiod_wq
, &rdata
->work
);
2325 mutex_lock(&server
->srv_mutex
);
2326 DeleteMidQEntry(mid
);
2327 mutex_unlock(&server
->srv_mutex
);
2328 add_credits(server
, credits_received
, 0);
2331 /* smb2_async_readv - send an async read, and set up mid to handle result */
2333 smb2_async_readv(struct cifs_readdata
*rdata
)
2337 struct smb2_sync_hdr
*shdr
;
2338 struct cifs_io_parms io_parms
;
2339 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2341 struct TCP_Server_Info
*server
;
2342 unsigned int total_len
;
2345 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
2346 __func__
, rdata
->offset
, rdata
->bytes
);
2348 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2349 io_parms
.offset
= rdata
->offset
;
2350 io_parms
.length
= rdata
->bytes
;
2351 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
2352 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
2353 io_parms
.pid
= rdata
->pid
;
2355 server
= io_parms
.tcon
->ses
->server
;
2357 rc
= smb2_new_read_req((void **) &buf
, &total_len
, &io_parms
, 0, 0);
2359 if (rc
== -EAGAIN
&& rdata
->credits
) {
2360 /* credits was reset by reconnect */
2362 /* reduce in_flight value since we won't send the req */
2363 spin_lock(&server
->req_lock
);
2364 server
->in_flight
--;
2365 spin_unlock(&server
->req_lock
);
2370 if (encryption_required(io_parms
.tcon
))
2371 flags
|= CIFS_TRANSFORM_REQ
;
2373 req_len
= cpu_to_be32(total_len
);
2375 rdata
->iov
[0].iov_base
= &req_len
;
2376 rdata
->iov
[0].iov_len
= sizeof(__be32
);
2377 rdata
->iov
[1].iov_base
= buf
;
2378 rdata
->iov
[1].iov_len
= total_len
;
2380 shdr
= (struct smb2_sync_hdr
*)buf
;
2382 if (rdata
->credits
) {
2383 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
2384 SMB2_MAX_BUFFER_SIZE
));
2385 shdr
->CreditRequest
= shdr
->CreditCharge
;
2386 spin_lock(&server
->req_lock
);
2387 server
->credits
+= rdata
->credits
-
2388 le16_to_cpu(shdr
->CreditCharge
);
2389 spin_unlock(&server
->req_lock
);
2390 wake_up(&server
->request_q
);
2391 flags
|= CIFS_HAS_CREDITS
;
2394 kref_get(&rdata
->refcount
);
2395 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
2396 cifs_readv_receive
, smb2_readv_callback
,
2397 smb3_handle_read_data
, rdata
, flags
);
2399 kref_put(&rdata
->refcount
, cifs_readdata_release
);
2400 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
2403 cifs_small_buf_release(buf
);
2408 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2409 unsigned int *nbytes
, char **buf
, int *buf_type
)
2411 int resp_buftype
, rc
= -EACCES
;
2412 struct smb2_read_plain_req
*req
= NULL
;
2413 struct smb2_read_rsp
*rsp
= NULL
;
2414 struct smb2_sync_hdr
*shdr
;
2416 struct kvec rsp_iov
;
2417 unsigned int total_len
;
2419 struct smb_rqst rqst
= { .rq_iov
= iov
,
2421 int flags
= CIFS_LOG_ERROR
;
2422 struct cifs_ses
*ses
= io_parms
->tcon
->ses
;
2425 rc
= smb2_new_read_req((void **)&req
, &total_len
, io_parms
, 0, 0);
2429 if (encryption_required(io_parms
->tcon
))
2430 flags
|= CIFS_TRANSFORM_REQ
;
2432 req_len
= cpu_to_be32(total_len
);
2434 iov
[0].iov_base
= &req_len
;
2435 iov
[0].iov_len
= sizeof(__be32
);
2436 iov
[1].iov_base
= req
;
2437 iov
[1].iov_len
= total_len
;
2439 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2440 cifs_small_buf_release(req
);
2442 rsp
= (struct smb2_read_rsp
*)rsp_iov
.iov_base
;
2443 shdr
= get_sync_hdr(rsp
);
2445 if (shdr
->Status
== STATUS_END_OF_FILE
) {
2446 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2451 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
2452 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
2454 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2455 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
2456 (*nbytes
> io_parms
->length
)) {
2457 cifs_dbg(FYI
, "bad length %d for count %d\n",
2458 *nbytes
, io_parms
->length
);
2465 memcpy(*buf
, (char *)shdr
+ rsp
->DataOffset
, *nbytes
);
2466 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2467 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
2468 *buf
= rsp_iov
.iov_base
;
2469 if (resp_buftype
== CIFS_SMALL_BUFFER
)
2470 *buf_type
= CIFS_SMALL_BUFFER
;
2471 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
2472 *buf_type
= CIFS_LARGE_BUFFER
;
2478 * Check the mid_state and signature on received buffer (if any), and queue the
2479 * workqueue completion task.
2482 smb2_writev_callback(struct mid_q_entry
*mid
)
2484 struct cifs_writedata
*wdata
= mid
->callback_data
;
2485 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2486 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2487 unsigned int written
;
2488 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
2489 unsigned int credits_received
= 1;
2491 switch (mid
->mid_state
) {
2492 case MID_RESPONSE_RECEIVED
:
2493 credits_received
= le16_to_cpu(rsp
->hdr
.sync_hdr
.CreditRequest
);
2494 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
2495 if (wdata
->result
!= 0)
2498 written
= le32_to_cpu(rsp
->DataLength
);
2500 * Mask off high 16 bits when bytes written as returned
2501 * by the server is greater than bytes requested by the
2502 * client. OS/2 servers are known to set incorrect
2505 if (written
> wdata
->bytes
)
2508 if (written
< wdata
->bytes
)
2509 wdata
->result
= -ENOSPC
;
2511 wdata
->bytes
= written
;
2513 case MID_REQUEST_SUBMITTED
:
2514 case MID_RETRY_NEEDED
:
2515 wdata
->result
= -EAGAIN
;
2518 wdata
->result
= -EIO
;
2523 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2525 queue_work(cifsiod_wq
, &wdata
->work
);
2526 mutex_lock(&server
->srv_mutex
);
2527 DeleteMidQEntry(mid
);
2528 mutex_unlock(&server
->srv_mutex
);
2529 add_credits(tcon
->ses
->server
, credits_received
, 0);
2532 /* smb2_async_writev - send an async write, and set up mid to handle result */
2534 smb2_async_writev(struct cifs_writedata
*wdata
,
2535 void (*release
)(struct kref
*kref
))
2537 int rc
= -EACCES
, flags
= 0;
2538 struct smb2_write_req
*req
= NULL
;
2539 struct smb2_sync_hdr
*shdr
;
2540 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2541 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2543 struct smb_rqst rqst
= { };
2545 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
2547 if (rc
== -EAGAIN
&& wdata
->credits
) {
2548 /* credits was reset by reconnect */
2550 /* reduce in_flight value since we won't send the req */
2551 spin_lock(&server
->req_lock
);
2552 server
->in_flight
--;
2553 spin_unlock(&server
->req_lock
);
2555 goto async_writev_out
;
2558 if (encryption_required(tcon
))
2559 flags
|= CIFS_TRANSFORM_REQ
;
2561 shdr
= get_sync_hdr(req
);
2562 shdr
->ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
2564 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
2565 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
2566 req
->WriteChannelInfoOffset
= 0;
2567 req
->WriteChannelInfoLength
= 0;
2569 req
->Offset
= cpu_to_le64(wdata
->offset
);
2570 /* 4 for rfc1002 length field */
2571 req
->DataOffset
= cpu_to_le16(
2572 offsetof(struct smb2_write_req
, Buffer
) - 4);
2573 req
->RemainingBytes
= 0;
2575 /* 4 for rfc1002 length field and 1 for Buffer */
2577 iov
[0].iov_base
= req
;
2578 iov
[1].iov_len
= get_rfc1002_length(req
) - 1;
2579 iov
[1].iov_base
= (char *)req
+ 4;
2583 rqst
.rq_pages
= wdata
->pages
;
2584 rqst
.rq_npages
= wdata
->nr_pages
;
2585 rqst
.rq_pagesz
= wdata
->pagesz
;
2586 rqst
.rq_tailsz
= wdata
->tailsz
;
2588 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
2589 wdata
->offset
, wdata
->bytes
);
2591 req
->Length
= cpu_to_le32(wdata
->bytes
);
2593 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
2595 if (wdata
->credits
) {
2596 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
2597 SMB2_MAX_BUFFER_SIZE
));
2598 shdr
->CreditRequest
= shdr
->CreditCharge
;
2599 spin_lock(&server
->req_lock
);
2600 server
->credits
+= wdata
->credits
-
2601 le16_to_cpu(shdr
->CreditCharge
);
2602 spin_unlock(&server
->req_lock
);
2603 wake_up(&server
->request_q
);
2604 flags
|= CIFS_HAS_CREDITS
;
2607 kref_get(&wdata
->refcount
);
2608 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, NULL
,
2612 kref_put(&wdata
->refcount
, release
);
2613 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2617 cifs_small_buf_release(req
);
2622 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2623 * The length field from io_parms must be at least 1 and indicates a number of
2624 * elements with data to write that begins with position 1 in iov array. All
2625 * data length is specified by count.
2628 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2629 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
2632 struct smb2_write_req
*req
= NULL
;
2633 struct smb2_write_rsp
*rsp
= NULL
;
2635 struct kvec rsp_iov
;
2643 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
2647 if (io_parms
->tcon
->ses
->server
== NULL
)
2648 return -ECONNABORTED
;
2650 if (encryption_required(io_parms
->tcon
))
2651 flags
|= CIFS_TRANSFORM_REQ
;
2653 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
2655 req
->PersistentFileId
= io_parms
->persistent_fid
;
2656 req
->VolatileFileId
= io_parms
->volatile_fid
;
2657 req
->WriteChannelInfoOffset
= 0;
2658 req
->WriteChannelInfoLength
= 0;
2660 req
->Length
= cpu_to_le32(io_parms
->length
);
2661 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2662 /* 4 for rfc1002 length field */
2663 req
->DataOffset
= cpu_to_le16(
2664 offsetof(struct smb2_write_req
, Buffer
) - 4);
2665 req
->RemainingBytes
= 0;
2667 iov
[0].iov_base
= (char *)req
;
2668 /* 4 for rfc1002 length field and 1 for Buffer */
2669 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2671 /* length of entire message including data to be written */
2672 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
2674 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
2675 &resp_buftype
, flags
, &rsp_iov
);
2676 cifs_small_buf_release(req
);
2677 rsp
= (struct smb2_write_rsp
*)rsp_iov
.iov_base
;
2680 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
2681 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
2683 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2685 free_rsp_buf(resp_buftype
, rsp
);
2690 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
2693 unsigned int entrycount
= 0;
2694 unsigned int next_offset
= 0;
2695 FILE_DIRECTORY_INFO
*entryptr
;
2697 if (bufstart
== NULL
)
2700 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
2703 entryptr
= (FILE_DIRECTORY_INFO
*)
2704 ((char *)entryptr
+ next_offset
);
2706 if ((char *)entryptr
+ size
> end_of_buf
) {
2707 cifs_dbg(VFS
, "malformed search entry would overflow\n");
2711 len
= le32_to_cpu(entryptr
->FileNameLength
);
2712 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
2713 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
2718 *lastentry
= (char *)entryptr
;
2721 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
2733 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
2734 u64 persistent_fid
, u64 volatile_fid
, int index
,
2735 struct cifs_search_info
*srch_inf
)
2737 struct smb2_query_directory_req
*req
;
2738 struct smb2_query_directory_rsp
*rsp
= NULL
;
2740 struct kvec rsp_iov
;
2743 int resp_buftype
= CIFS_NO_BUFFER
;
2744 unsigned char *bufptr
;
2745 struct TCP_Server_Info
*server
;
2746 struct cifs_ses
*ses
= tcon
->ses
;
2747 __le16 asteriks
= cpu_to_le16('*');
2749 unsigned int output_size
= CIFSMaxBufSize
;
2750 size_t info_buf_size
;
2753 if (ses
&& (ses
->server
))
2754 server
= ses
->server
;
2758 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
2762 if (encryption_required(tcon
))
2763 flags
|= CIFS_TRANSFORM_REQ
;
2765 switch (srch_inf
->info_level
) {
2766 case SMB_FIND_FILE_DIRECTORY_INFO
:
2767 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
2768 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
2770 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
2771 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
2772 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
2775 cifs_dbg(VFS
, "info level %u isn't supported\n",
2776 srch_inf
->info_level
);
2781 req
->FileIndex
= cpu_to_le32(index
);
2782 req
->PersistentFileId
= persistent_fid
;
2783 req
->VolatileFileId
= volatile_fid
;
2786 bufptr
= req
->Buffer
;
2787 memcpy(bufptr
, &asteriks
, len
);
2789 req
->FileNameOffset
=
2790 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
2791 req
->FileNameLength
= cpu_to_le16(len
);
2793 * BB could be 30 bytes or so longer if we used SMB2 specific
2794 * buffer lengths, but this is safe and close enough.
2796 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
2797 output_size
= min_t(unsigned int, output_size
, 2 << 15);
2798 req
->OutputBufferLength
= cpu_to_le32(output_size
);
2800 iov
[0].iov_base
= (char *)req
;
2801 /* 4 for RFC1001 length and 1 for Buffer */
2802 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2804 iov
[1].iov_base
= (char *)(req
->Buffer
);
2805 iov
[1].iov_len
= len
;
2807 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
2809 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, flags
, &rsp_iov
);
2810 cifs_small_buf_release(req
);
2811 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
.iov_base
;
2814 if (rc
== -ENODATA
&&
2815 rsp
->hdr
.sync_hdr
.Status
== STATUS_NO_MORE_FILES
) {
2816 srch_inf
->endOfSearch
= true;
2819 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
2823 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2824 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2829 srch_inf
->unicode
= true;
2831 if (srch_inf
->ntwrk_buf_start
) {
2832 if (srch_inf
->smallBuf
)
2833 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
2835 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
2837 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
2838 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
2839 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
2840 /* 4 for rfc1002 length field */
2841 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
2842 srch_inf
->entries_in_buffer
=
2843 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
2844 &srch_inf
->last_entry
, info_buf_size
);
2845 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
2846 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
2847 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
2848 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
2849 if (resp_buftype
== CIFS_LARGE_BUFFER
)
2850 srch_inf
->smallBuf
= false;
2851 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
2852 srch_inf
->smallBuf
= true;
2854 cifs_dbg(VFS
, "illegal search buffer type\n");
2859 free_rsp_buf(resp_buftype
, rsp
);
2864 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2865 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
2866 unsigned int num
, void **data
, unsigned int *size
)
2868 struct smb2_set_info_req
*req
;
2869 struct smb2_set_info_rsp
*rsp
= NULL
;
2871 struct kvec rsp_iov
;
2875 struct TCP_Server_Info
*server
;
2876 struct cifs_ses
*ses
= tcon
->ses
;
2879 if (ses
&& (ses
->server
))
2880 server
= ses
->server
;
2887 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
2891 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
2897 if (encryption_required(tcon
))
2898 flags
|= CIFS_TRANSFORM_REQ
;
2900 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(pid
);
2902 req
->InfoType
= SMB2_O_INFO_FILE
;
2903 req
->FileInfoClass
= info_class
;
2904 req
->PersistentFileId
= persistent_fid
;
2905 req
->VolatileFileId
= volatile_fid
;
2907 /* 4 for RFC1001 length and 1 for Buffer */
2909 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
2910 req
->BufferLength
= cpu_to_le32(*size
);
2912 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
2914 memcpy(req
->Buffer
, *data
, *size
);
2916 iov
[0].iov_base
= (char *)req
;
2917 /* 4 for RFC1001 length */
2918 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2920 for (i
= 1; i
< num
; i
++) {
2921 inc_rfc1001_len(req
, size
[i
]);
2922 le32_add_cpu(&req
->BufferLength
, size
[i
]);
2923 iov
[i
].iov_base
= (char *)data
[i
];
2924 iov
[i
].iov_len
= size
[i
];
2927 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, flags
, &rsp_iov
);
2928 cifs_small_buf_release(req
);
2929 rsp
= (struct smb2_set_info_rsp
*)rsp_iov
.iov_base
;
2932 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
2934 free_rsp_buf(resp_buftype
, rsp
);
2940 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
2941 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2943 struct smb2_file_rename_info info
;
2945 unsigned int size
[2];
2947 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2949 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2953 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
2954 /* 0 = fail if target already exists */
2955 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2956 info
.FileNameLength
= cpu_to_le32(len
);
2959 size
[0] = sizeof(struct smb2_file_rename_info
);
2961 data
[1] = target_file
;
2962 size
[1] = len
+ 2 /* null */;
2964 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2965 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2972 SMB2_rmdir(const unsigned int xid
, struct cifs_tcon
*tcon
,
2973 u64 persistent_fid
, u64 volatile_fid
)
2975 __u8 delete_pending
= 1;
2979 data
= &delete_pending
;
2980 size
= 1; /* sizeof __u8 */
2982 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2983 current
->tgid
, FILE_DISPOSITION_INFORMATION
, 1, &data
,
2988 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2989 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2991 struct smb2_file_link_info info
;
2993 unsigned int size
[2];
2995 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2997 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
3001 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
3002 /* 0 = fail if link already exists */
3003 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3004 info
.FileNameLength
= cpu_to_le32(len
);
3007 size
[0] = sizeof(struct smb2_file_link_info
);
3009 data
[1] = target_file
;
3010 size
[1] = len
+ 2 /* null */;
3012 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3013 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
3019 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3020 u64 volatile_fid
, u32 pid
, __le64
*eof
, bool is_falloc
)
3022 struct smb2_file_eof_info info
;
3026 info
.EndOfFile
= *eof
;
3029 size
= sizeof(struct smb2_file_eof_info
);
3032 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3033 pid
, FILE_ALLOCATION_INFORMATION
, 1, &data
, &size
);
3035 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3036 pid
, FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
3040 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3041 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
3044 size
= sizeof(FILE_BASIC_INFO
);
3045 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3046 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
3047 (void **)&buf
, &size
);
3051 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3052 const u64 persistent_fid
, const u64 volatile_fid
,
3056 struct smb2_oplock_break
*req
= NULL
;
3057 int flags
= CIFS_OBREAK_OP
;
3059 cifs_dbg(FYI
, "SMB2_oplock_break\n");
3060 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
3064 if (encryption_required(tcon
))
3065 flags
|= CIFS_TRANSFORM_REQ
;
3067 req
->VolatileFid
= volatile_fid
;
3068 req
->PersistentFid
= persistent_fid
;
3069 req
->OplockLevel
= oplock_level
;
3070 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
3072 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, flags
);
3073 cifs_small_buf_release(req
);
3076 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3077 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
3084 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
3085 struct kstatfs
*kst
)
3087 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
3088 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
3089 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
3090 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
3091 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
3096 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
3097 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
3100 struct smb2_query_info_req
*req
;
3102 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
3104 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
3107 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
3111 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
3112 req
->FileInfoClass
= level
;
3113 req
->PersistentFileId
= persistent_fid
;
3114 req
->VolatileFileId
= volatile_fid
;
3115 /* 4 for rfc1002 length field and 1 for pad */
3116 req
->InputBufferOffset
=
3117 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
3118 req
->OutputBufferLength
= cpu_to_le32(
3119 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
3121 iov
->iov_base
= (char *)req
;
3122 /* 4 for rfc1002 length field */
3123 iov
->iov_len
= get_rfc1002_length(req
) + 4;
3128 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3129 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
3131 struct smb2_query_info_rsp
*rsp
= NULL
;
3133 struct kvec rsp_iov
;
3136 struct cifs_ses
*ses
= tcon
->ses
;
3137 struct smb2_fs_full_size_info
*info
= NULL
;
3140 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
3141 sizeof(struct smb2_fs_full_size_info
),
3142 persistent_fid
, volatile_fid
);
3146 if (encryption_required(tcon
))
3147 flags
|= CIFS_TRANSFORM_REQ
;
3149 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
3150 cifs_small_buf_release(iov
.iov_base
);
3152 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3155 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3157 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
3158 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
3159 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
3160 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
3161 sizeof(struct smb2_fs_full_size_info
));
3163 copy_fs_info_to_kstatfs(info
, fsdata
);
3166 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3171 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
3172 u64 persistent_fid
, u64 volatile_fid
, int level
)
3174 struct smb2_query_info_rsp
*rsp
= NULL
;
3176 struct kvec rsp_iov
;
3178 int resp_buftype
, max_len
, min_len
;
3179 struct cifs_ses
*ses
= tcon
->ses
;
3180 unsigned int rsp_len
, offset
;
3183 if (level
== FS_DEVICE_INFORMATION
) {
3184 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3185 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3186 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
3187 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
3188 min_len
= MIN_FS_ATTR_INFO_SIZE
;
3189 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3190 max_len
= sizeof(struct smb3_fs_ss_info
);
3191 min_len
= sizeof(struct smb3_fs_ss_info
);
3193 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
3197 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
3198 persistent_fid
, volatile_fid
);
3202 if (encryption_required(tcon
))
3203 flags
|= CIFS_TRANSFORM_REQ
;
3205 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
3206 cifs_small_buf_release(iov
.iov_base
);
3208 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3211 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3213 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
3214 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
3215 rc
= validate_buf(offset
, rsp_len
, &rsp
->hdr
, min_len
);
3219 if (level
== FS_ATTRIBUTE_INFORMATION
)
3220 memcpy(&tcon
->fsAttrInfo
, 4 /* RFC1001 len */ + offset
3221 + (char *)&rsp
->hdr
, min_t(unsigned int,
3223 else if (level
== FS_DEVICE_INFORMATION
)
3224 memcpy(&tcon
->fsDevInfo
, 4 /* RFC1001 len */ + offset
3225 + (char *)&rsp
->hdr
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
3226 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3227 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
3228 (4 /* RFC1001 len */ + offset
+ (char *)&rsp
->hdr
);
3229 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
3230 tcon
->perf_sector_size
=
3231 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
3235 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3240 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
3241 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3242 const __u32 num_lock
, struct smb2_lock_element
*buf
)
3245 struct smb2_lock_req
*req
= NULL
;
3247 struct kvec rsp_iov
;
3250 int flags
= CIFS_NO_RESP
;
3252 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
3254 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
3258 if (encryption_required(tcon
))
3259 flags
|= CIFS_TRANSFORM_REQ
;
3261 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3262 req
->LockCount
= cpu_to_le16(num_lock
);
3264 req
->PersistentFileId
= persist_fid
;
3265 req
->VolatileFileId
= volatile_fid
;
3267 count
= num_lock
* sizeof(struct smb2_lock_element
);
3268 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
3270 iov
[0].iov_base
= (char *)req
;
3271 /* 4 for rfc1002 length field and count for all locks */
3272 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
3273 iov
[1].iov_base
= (char *)buf
;
3274 iov
[1].iov_len
= count
;
3276 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
3277 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, flags
,
3279 cifs_small_buf_release(req
);
3281 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
3282 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
3289 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
3290 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3291 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
3294 struct smb2_lock_element lock
;
3296 lock
.Offset
= cpu_to_le64(offset
);
3297 lock
.Length
= cpu_to_le64(length
);
3298 lock
.Flags
= cpu_to_le32(lock_flags
);
3299 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
3300 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
3302 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
3306 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3307 __u8
*lease_key
, const __le32 lease_state
)
3310 struct smb2_lease_ack
*req
= NULL
;
3311 int flags
= CIFS_OBREAK_OP
;
3313 cifs_dbg(FYI
, "SMB2_lease_break\n");
3314 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
3318 if (encryption_required(tcon
))
3319 flags
|= CIFS_TRANSFORM_REQ
;
3321 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
3322 req
->StructureSize
= cpu_to_le16(36);
3323 inc_rfc1001_len(req
, 12);
3325 memcpy(req
->LeaseKey
, lease_key
, 16);
3326 req
->LeaseState
= lease_state
;
3328 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, flags
);
3329 cifs_small_buf_release(req
);
3332 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3333 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);