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 */
82 smb2_hdr_assemble(struct smb2_hdr
*hdr
, __le16 smb2_cmd
/* command */ ,
83 const struct cifs_tcon
*tcon
)
85 struct smb2_pdu
*pdu
= (struct smb2_pdu
*)hdr
;
86 struct smb2_sync_hdr
*shdr
= get_sync_hdr(hdr
);
87 char *temp
= (char *)hdr
;
88 /* lookup word count ie StructureSize from table */
89 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_cmd
)];
92 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
93 * largest operations (Create)
97 /* Note this is only network field converted to big endian */
98 hdr
->smb2_buf_length
=
99 cpu_to_be32(parmsize
+ sizeof(struct smb2_sync_hdr
));
101 shdr
->ProtocolId
= SMB2_PROTO_NUMBER
;
102 shdr
->StructureSize
= cpu_to_le16(64);
103 shdr
->Command
= smb2_cmd
;
104 if (tcon
&& tcon
->ses
&& tcon
->ses
->server
) {
105 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
107 spin_lock(&server
->req_lock
);
108 /* Request up to 2 credits but don't go over the limit. */
109 if (server
->credits
>= server
->max_credits
)
110 shdr
->CreditRequest
= cpu_to_le16(0);
112 shdr
->CreditRequest
= cpu_to_le16(
113 min_t(int, server
->max_credits
-
114 server
->credits
, 2));
115 spin_unlock(&server
->req_lock
);
117 shdr
->CreditRequest
= cpu_to_le16(2);
119 shdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
124 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
125 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
126 if ((tcon
->ses
) && (tcon
->ses
->server
) &&
127 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
128 shdr
->CreditCharge
= cpu_to_le16(1);
129 /* else CreditCharge MBZ */
131 shdr
->TreeId
= tcon
->tid
;
132 /* Uid is not converted */
134 shdr
->SessionId
= tcon
->ses
->Suid
;
137 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
138 * to pass the path on the Open SMB prefixed by \\server\share.
139 * Not sure when we would need to do the augmented path (if ever) and
140 * setting this flag breaks the SMB2 open operation since it is
141 * illegal to send an empty path name (without \\server\share prefix)
142 * when the DFS flag is set in the SMB open header. We could
143 * consider setting the flag on all operations other than open
144 * but it is safer to net set it for now.
146 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
147 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
149 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
)
150 shdr
->Flags
|= SMB2_FLAGS_SIGNED
;
152 pdu
->StructureSize2
= cpu_to_le16(parmsize
);
157 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
160 struct nls_table
*nls_codepage
;
161 struct cifs_ses
*ses
;
162 struct TCP_Server_Info
*server
;
165 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
166 * check for tcp and smb session status done differently
167 * for those three - in the calling routine.
172 if (smb2_command
== SMB2_TREE_CONNECT
)
175 if (tcon
->tidStatus
== CifsExiting
) {
177 * only tree disconnect, open, and write,
178 * (and ulogoff which does not have tcon)
179 * are allowed as we start force umount.
181 if ((smb2_command
!= SMB2_WRITE
) &&
182 (smb2_command
!= SMB2_CREATE
) &&
183 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
184 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
189 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
190 (!tcon
->ses
->server
))
194 server
= ses
->server
;
197 * Give demultiplex thread up to 10 seconds to reconnect, should be
198 * greater than cifs socket timeout which is 7 seconds
200 while (server
->tcpStatus
== CifsNeedReconnect
) {
202 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
203 * here since they are implicitly done when session drops.
205 switch (smb2_command
) {
207 * BB Should we keep oplock break and add flush to exceptions?
209 case SMB2_TREE_DISCONNECT
:
212 case SMB2_OPLOCK_BREAK
:
216 wait_event_interruptible_timeout(server
->response_q
,
217 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
219 /* are we still trying to reconnect? */
220 if (server
->tcpStatus
!= CifsNeedReconnect
)
224 * on "soft" mounts we wait once. Hard mounts keep
225 * retrying until process is killed or server comes
229 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
234 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
237 nls_codepage
= load_nls_default();
240 * need to prevent multiple threads trying to simultaneously reconnect
241 * the same SMB session
243 mutex_lock(&tcon
->ses
->session_mutex
);
244 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
245 if (!rc
&& tcon
->ses
->need_reconnect
)
246 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
248 if (rc
|| !tcon
->need_reconnect
) {
249 mutex_unlock(&tcon
->ses
->session_mutex
);
253 cifs_mark_open_files_invalid(tcon
);
254 if (tcon
->use_persistent
)
255 tcon
->need_reopen_files
= true;
257 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
258 mutex_unlock(&tcon
->ses
->session_mutex
);
260 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
264 if (smb2_command
!= SMB2_INTERNAL_CMD
)
265 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
267 atomic_inc(&tconInfoReconnectCount
);
270 * Check if handle based operation so we know whether we can continue
271 * or not without returning to caller to reset file handle.
274 * BB Is flush done by server on drop of tcp session? Should we special
275 * case it and skip above?
277 switch (smb2_command
) {
283 case SMB2_QUERY_DIRECTORY
:
284 case SMB2_CHANGE_NOTIFY
:
285 case SMB2_QUERY_INFO
:
289 unload_nls(nls_codepage
);
294 * Allocate and return pointer to an SMB request hdr, and set basic
295 * SMB information in the SMB header. If the return code is zero, this
296 * function must have filled in request_buf pointer.
299 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
304 rc
= smb2_reconnect(smb2_command
, tcon
);
308 /* BB eventually switch this to SMB2 specific small buf size */
309 *request_buf
= cifs_small_buf_get();
310 if (*request_buf
== NULL
) {
311 /* BB should we add a retry in here if not a writepage? */
315 smb2_hdr_assemble((struct smb2_hdr
*) *request_buf
, smb2_command
, tcon
);
318 #ifdef CONFIG_CIFS_STATS2
319 uint16_t com_code
= le16_to_cpu(smb2_command
);
320 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
322 cifs_stats_inc(&tcon
->num_smbs_sent
);
328 #ifdef CONFIG_CIFS_SMB311
329 /* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
330 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
333 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
334 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
337 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
339 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
340 pneg_ctxt
->DataLength
= cpu_to_le16(38);
341 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
342 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
343 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
344 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
348 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
350 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
351 pneg_ctxt
->DataLength
= cpu_to_le16(6);
352 pneg_ctxt
->CipherCount
= cpu_to_le16(2);
353 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_GCM
;
354 pneg_ctxt
->Ciphers
[1] = SMB2_ENCRYPTION_AES128_CCM
;
358 assemble_neg_contexts(struct smb2_negotiate_req
*req
)
361 /* +4 is to account for the RFC1001 len field */
362 char *pneg_ctxt
= (char *)req
+ OFFSET_OF_NEG_CONTEXT
+ 4;
364 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
365 /* Add 2 to size to round to 8 byte boundary */
366 pneg_ctxt
+= 2 + sizeof(struct smb2_preauth_neg_context
);
367 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
368 req
->NegotiateContextOffset
= cpu_to_le32(OFFSET_OF_NEG_CONTEXT
);
369 req
->NegotiateContextCount
= cpu_to_le16(2);
370 inc_rfc1001_len(req
, 4 + sizeof(struct smb2_preauth_neg_context
) + 2
371 + sizeof(struct smb2_encryption_neg_context
)); /* calculate hash */
374 static void assemble_neg_contexts(struct smb2_negotiate_req
*req
)
383 * SMB2 Worker functions follow:
385 * The general structure of the worker functions is:
386 * 1) Call smb2_init (assembles SMB2 header)
387 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
388 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
389 * 4) Decode SMB2 command specific fields in the fixed length area
390 * 5) Decode variable length data area (if any for this SMB2 command type)
391 * 6) Call free smb buffer
397 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
399 struct smb2_negotiate_req
*req
;
400 struct smb2_negotiate_rsp
*rsp
;
405 struct TCP_Server_Info
*server
= ses
->server
;
406 int blob_offset
, blob_length
;
408 int flags
= CIFS_NEG_OP
;
410 cifs_dbg(FYI
, "Negotiate protocol\n");
413 WARN(1, "%s: server is NULL!\n", __func__
);
417 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
421 req
->hdr
.sync_hdr
.SessionId
= 0;
423 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
425 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
426 inc_rfc1001_len(req
, 2);
428 /* only one of SMB2 signing flags may be set in SMB2 request */
430 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
431 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
432 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
434 req
->SecurityMode
= 0;
436 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
438 /* ClientGUID must be zero for SMB2.02 dialect */
439 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
440 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
442 memcpy(req
->ClientGUID
, server
->client_guid
,
443 SMB2_CLIENT_GUID_SIZE
);
444 if (ses
->server
->vals
->protocol_id
== SMB311_PROT_ID
)
445 assemble_neg_contexts(req
);
447 iov
[0].iov_base
= (char *)req
;
448 /* 4 for rfc1002 length field */
449 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
451 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
452 cifs_small_buf_release(req
);
453 rsp
= (struct smb2_negotiate_rsp
*)rsp_iov
.iov_base
;
455 * No tcon so can't do
456 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
461 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
463 /* BB we may eventually want to match the negotiated vs. requested
464 dialect, even though we are only requesting one at a time */
465 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
466 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
467 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
468 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
469 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
470 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
471 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
472 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
473 #ifdef CONFIG_CIFS_SMB311
474 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
475 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
478 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
479 le16_to_cpu(rsp
->DialectRevision
));
483 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
485 /* SMB2 only has an extended negflavor */
486 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
487 /* set it to the maximum buffer size value we can send with 1 credit */
488 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
489 SMB2_MAX_BUFFER_SIZE
);
490 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
491 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
492 /* BB Do we need to validate the SecurityMode? */
493 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
494 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
496 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
498 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
501 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
503 * ses->sectype = RawNTLMSSP;
504 * but for time being this is our only auth choice so doesn't matter.
505 * We just found a server which sets blob length to zero expecting raw.
507 if (blob_length
== 0)
508 cifs_dbg(FYI
, "missing security blob on negprot\n");
510 rc
= cifs_enable_signing(server
, ses
->sign
);
514 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
521 free_rsp_buf(resp_buftype
, rsp
);
525 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
528 struct validate_negotiate_info_req vneg_inbuf
;
529 struct validate_negotiate_info_rsp
*pneg_rsp
;
532 cifs_dbg(FYI
, "validate negotiate\n");
535 * validation ioctl must be signed, so no point sending this if we
536 * can not sign it. We could eventually change this to selectively
537 * sign just this, the first and only signed request on a connection.
538 * This is good enough for now since a user who wants better security
539 * would also enable signing on the mount. Having validation of
540 * negotiate info for signed connections helps reduce attack vectors
542 if (tcon
->ses
->server
->sign
== false)
543 return 0; /* validation requires signing */
545 vneg_inbuf
.Capabilities
=
546 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
547 memcpy(vneg_inbuf
.Guid
, tcon
->ses
->server
->client_guid
,
548 SMB2_CLIENT_GUID_SIZE
);
551 vneg_inbuf
.SecurityMode
=
552 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
553 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
554 vneg_inbuf
.SecurityMode
=
555 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
557 vneg_inbuf
.SecurityMode
= 0;
559 vneg_inbuf
.DialectCount
= cpu_to_le16(1);
560 vneg_inbuf
.Dialects
[0] =
561 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
563 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
564 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
565 (char *)&vneg_inbuf
, sizeof(struct validate_negotiate_info_req
),
566 (char **)&pneg_rsp
, &rsplen
);
569 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
573 if (rsplen
!= sizeof(struct validate_negotiate_info_rsp
)) {
574 cifs_dbg(VFS
, "invalid size of protocol negotiate response\n");
578 /* check validate negotiate info response matches what we got earlier */
579 if (pneg_rsp
->Dialect
!=
580 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
))
583 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
586 /* do not validate server guid because not saved at negprot time yet */
588 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
589 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
592 /* validate negotiate successful */
593 cifs_dbg(FYI
, "validate negotiate info successful\n");
597 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
601 struct SMB2_sess_data
{
603 struct cifs_ses
*ses
;
604 struct nls_table
*nls_cp
;
605 void (*func
)(struct SMB2_sess_data
*);
607 u64 previous_session
;
609 /* we will send the SMB in three pieces:
610 * a fixed length beginning part, an optional
611 * SPNEGO blob (which can be zero length), and a
612 * last part which will include the strings
613 * and rest of bcc area. This allows us to avoid
614 * a large buffer 17K allocation
621 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
624 struct cifs_ses
*ses
= sess_data
->ses
;
625 struct smb2_sess_setup_req
*req
;
626 struct TCP_Server_Info
*server
= ses
->server
;
628 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
632 /* First session, not a reauthenticate */
633 req
->hdr
.sync_hdr
.SessionId
= 0;
635 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
636 req
->PreviousSessionId
= sess_data
->previous_session
;
638 req
->Flags
= 0; /* MBZ */
639 /* to enable echos and oplocks */
640 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(3);
642 /* only one of SMB2 signing flags may be set in SMB2 request */
644 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
645 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
646 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
648 req
->SecurityMode
= 0;
650 req
->Capabilities
= 0;
651 req
->Channel
= 0; /* MBZ */
653 sess_data
->iov
[0].iov_base
= (char *)req
;
654 /* 4 for rfc1002 length field and 1 for pad */
655 sess_data
->iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
657 * This variable will be used to clear the buffer
658 * allocated above in case of any error in the calling function.
660 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
666 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
668 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
669 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
673 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
676 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
677 struct kvec rsp_iov
= { NULL
, 0 };
679 /* Testing shows that buffer offset must be at location of Buffer[0] */
680 req
->SecurityBufferOffset
=
681 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
682 1 /* pad */ - 4 /* rfc1001 len */);
683 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
685 inc_rfc1001_len(req
, sess_data
->iov
[1].iov_len
- 1 /* pad */);
687 /* BB add code to build os and lm fields */
689 rc
= SendReceive2(sess_data
->xid
, sess_data
->ses
,
691 &sess_data
->buf0_type
,
692 CIFS_LOG_ERROR
| CIFS_NEG_OP
, &rsp_iov
);
693 cifs_small_buf_release(sess_data
->iov
[0].iov_base
);
694 memcpy(&sess_data
->iov
[0], &rsp_iov
, sizeof(struct kvec
));
700 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
703 struct cifs_ses
*ses
= sess_data
->ses
;
705 mutex_lock(&ses
->server
->srv_mutex
);
706 if (ses
->server
->sign
&& ses
->server
->ops
->generate_signingkey
) {
707 rc
= ses
->server
->ops
->generate_signingkey(ses
);
708 kfree(ses
->auth_key
.response
);
709 ses
->auth_key
.response
= NULL
;
712 "SMB3 session key generation failed\n");
713 mutex_unlock(&ses
->server
->srv_mutex
);
717 if (!ses
->server
->session_estab
) {
718 ses
->server
->sequence_number
= 0x2;
719 ses
->server
->session_estab
= true;
721 mutex_unlock(&ses
->server
->srv_mutex
);
723 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
724 spin_lock(&GlobalMid_Lock
);
725 ses
->status
= CifsGood
;
726 ses
->need_reconnect
= false;
727 spin_unlock(&GlobalMid_Lock
);
730 if (!ses
->server
->sign
) {
731 kfree(ses
->auth_key
.response
);
732 ses
->auth_key
.response
= NULL
;
737 #ifdef CONFIG_CIFS_UPCALL
739 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
742 struct cifs_ses
*ses
= sess_data
->ses
;
743 struct cifs_spnego_msg
*msg
;
744 struct key
*spnego_key
= NULL
;
745 struct smb2_sess_setup_rsp
*rsp
= NULL
;
747 rc
= SMB2_sess_alloc_buffer(sess_data
);
751 spnego_key
= cifs_get_spnego_key(ses
);
752 if (IS_ERR(spnego_key
)) {
753 rc
= PTR_ERR(spnego_key
);
758 msg
= spnego_key
->payload
.data
[0];
760 * check version field to make sure that cifs.upcall is
761 * sending us a response in an expected form
763 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
765 "bad cifs.upcall version. Expected %d got %d",
766 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
768 goto out_put_spnego_key
;
771 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
773 if (!ses
->auth_key
.response
) {
775 "Kerberos can't allocate (%u bytes) memory",
778 goto out_put_spnego_key
;
780 ses
->auth_key
.len
= msg
->sesskey_len
;
782 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
783 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
785 rc
= SMB2_sess_sendreceive(sess_data
);
787 goto out_put_spnego_key
;
789 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
790 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
792 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
793 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
794 cifs_dbg(VFS
, "SMB3 encryption not supported yet\n");
796 rc
= SMB2_sess_establish_session(sess_data
);
798 key_invalidate(spnego_key
);
801 sess_data
->result
= rc
;
802 sess_data
->func
= NULL
;
803 SMB2_sess_free_buffer(sess_data
);
807 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
809 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
810 sess_data
->result
= -EOPNOTSUPP
;
811 sess_data
->func
= NULL
;
816 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
819 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
822 struct cifs_ses
*ses
= sess_data
->ses
;
823 struct smb2_sess_setup_rsp
*rsp
= NULL
;
824 char *ntlmssp_blob
= NULL
;
825 bool use_spnego
= false; /* else use raw ntlmssp */
829 * If memory allocation is successful, caller of this function
832 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
837 ses
->ntlmssp
->sesskey_per_smbsess
= true;
839 rc
= SMB2_sess_alloc_buffer(sess_data
);
843 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
845 if (ntlmssp_blob
== NULL
) {
850 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
852 /* BB eventually need to add this */
853 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
857 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
858 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
860 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
861 sess_data
->iov
[1].iov_len
= blob_length
;
863 rc
= SMB2_sess_sendreceive(sess_data
);
864 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
866 /* If true, rc here is expected and not an error */
867 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
868 rsp
->hdr
.sync_hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
874 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
875 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
876 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
877 le16_to_cpu(rsp
->SecurityBufferOffset
));
881 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
882 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
886 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
889 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
890 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
891 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
892 cifs_dbg(VFS
, "SMB3 encryption not supported yet\n");
896 SMB2_sess_free_buffer(sess_data
);
898 sess_data
->result
= 0;
899 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
905 sess_data
->result
= rc
;
906 sess_data
->func
= NULL
;
910 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
913 struct cifs_ses
*ses
= sess_data
->ses
;
914 struct smb2_sess_setup_req
*req
;
915 struct smb2_sess_setup_rsp
*rsp
= NULL
;
916 unsigned char *ntlmssp_blob
= NULL
;
917 bool use_spnego
= false; /* else use raw ntlmssp */
920 rc
= SMB2_sess_alloc_buffer(sess_data
);
924 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
925 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
927 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
, ses
,
930 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
935 /* BB eventually need to add this */
936 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
940 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
941 sess_data
->iov
[1].iov_len
= blob_length
;
943 rc
= SMB2_sess_sendreceive(sess_data
);
947 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
949 ses
->Suid
= rsp
->hdr
.sync_hdr
.SessionId
;
950 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
951 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
952 cifs_dbg(VFS
, "SMB3 encryption not supported yet\n");
954 rc
= SMB2_sess_establish_session(sess_data
);
957 SMB2_sess_free_buffer(sess_data
);
960 sess_data
->result
= rc
;
961 sess_data
->func
= NULL
;
965 SMB2_select_sec(struct cifs_ses
*ses
, struct SMB2_sess_data
*sess_data
)
967 if (ses
->sectype
!= Kerberos
&& ses
->sectype
!= RawNTLMSSP
)
968 ses
->sectype
= RawNTLMSSP
;
970 switch (ses
->sectype
) {
972 sess_data
->func
= SMB2_auth_kerberos
;
975 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
978 cifs_dbg(VFS
, "secType %d not supported!\n", ses
->sectype
);
986 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
987 const struct nls_table
*nls_cp
)
990 struct TCP_Server_Info
*server
= ses
->server
;
991 struct SMB2_sess_data
*sess_data
;
993 cifs_dbg(FYI
, "Session Setup\n");
996 WARN(1, "%s: server is NULL!\n", __func__
);
1000 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
1004 rc
= SMB2_select_sec(ses
, sess_data
);
1007 sess_data
->xid
= xid
;
1008 sess_data
->ses
= ses
;
1009 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1010 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1012 while (sess_data
->func
)
1013 sess_data
->func(sess_data
);
1015 rc
= sess_data
->result
;
1022 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1024 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1026 struct TCP_Server_Info
*server
;
1028 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1030 if (ses
&& (ses
->server
))
1031 server
= ses
->server
;
1035 /* no need to send SMB logoff if uid already closed due to reconnect */
1036 if (ses
->need_reconnect
)
1037 goto smb2_session_already_dead
;
1039 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
1043 /* since no tcon, smb2_init can not do this, so do here */
1044 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1046 req
->hdr
.sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1048 rc
= SendReceiveNoRsp(xid
, ses
, (char *) req
, 0);
1049 cifs_small_buf_release(req
);
1051 * No tcon so can't do
1052 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1055 smb2_session_already_dead
:
1059 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1061 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1064 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1066 /* These are similar values to what Windows uses */
1067 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1069 tcon
->max_chunks
= 256;
1070 tcon
->max_bytes_chunk
= 1048576;
1071 tcon
->max_bytes_copy
= 16777216;
1075 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1076 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1078 struct smb2_tree_connect_req
*req
;
1079 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1081 struct kvec rsp_iov
;
1085 struct TCP_Server_Info
*server
;
1086 __le16
*unc_path
= NULL
;
1088 cifs_dbg(FYI
, "TCON\n");
1090 if ((ses
->server
) && tree
)
1091 server
= ses
->server
;
1095 if (tcon
&& tcon
->bad_network_name
)
1098 if ((tcon
&& tcon
->seal
) &&
1099 ((ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
) == 0)) {
1100 cifs_dbg(VFS
, "encryption requested but no server support");
1104 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1105 if (unc_path
== NULL
)
1108 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1110 if (unc_path_len
< 2) {
1115 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
1122 /* since no tcon, smb2_init can not do this, so do here */
1123 req
->hdr
.sync_hdr
.SessionId
= ses
->Suid
;
1124 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
1125 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
1128 iov
[0].iov_base
= (char *)req
;
1129 /* 4 for rfc1002 length field and 1 for pad */
1130 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1132 /* Testing shows that buffer offset must be at location of Buffer[0] */
1133 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1134 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1135 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1136 iov
[1].iov_base
= unc_path
;
1137 iov
[1].iov_len
= unc_path_len
;
1139 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
1141 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0, &rsp_iov
);
1142 cifs_small_buf_release(req
);
1143 rsp
= (struct smb2_tree_connect_rsp
*)rsp_iov
.iov_base
;
1147 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1148 tcon
->need_reconnect
= true;
1150 goto tcon_error_exit
;
1154 ses
->ipc_tid
= rsp
->hdr
.sync_hdr
.TreeId
;
1158 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
1159 cifs_dbg(FYI
, "connection to disk share\n");
1160 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
1162 cifs_dbg(FYI
, "connection to pipe share\n");
1163 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
1165 cifs_dbg(FYI
, "connection to printer\n");
1167 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1169 goto tcon_error_exit
;
1172 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1173 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1174 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1175 tcon
->tidStatus
= CifsGood
;
1176 tcon
->need_reconnect
= false;
1177 tcon
->tid
= rsp
->hdr
.sync_hdr
.TreeId
;
1178 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1180 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1181 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1182 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1183 init_copy_chunk_defaults(tcon
);
1184 if (tcon
->share_flags
& SHI1005_FLAGS_ENCRYPT_DATA
)
1185 cifs_dbg(VFS
, "Encrypted shares not supported");
1186 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1187 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1189 free_rsp_buf(resp_buftype
, rsp
);
1194 if (rsp
->hdr
.sync_hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1195 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1197 tcon
->bad_network_name
= true;
1203 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1205 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1207 struct TCP_Server_Info
*server
;
1208 struct cifs_ses
*ses
= tcon
->ses
;
1210 cifs_dbg(FYI
, "Tree Disconnect\n");
1212 if (ses
&& (ses
->server
))
1213 server
= ses
->server
;
1217 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1220 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
1224 rc
= SendReceiveNoRsp(xid
, ses
, (char *)req
, 0);
1225 cifs_small_buf_release(req
);
1227 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1233 static struct create_durable
*
1234 create_durable_buf(void)
1236 struct create_durable
*buf
;
1238 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1242 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1243 (struct create_durable
, Data
));
1244 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1245 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1246 (struct create_durable
, Name
));
1247 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1248 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1256 static struct create_durable
*
1257 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1259 struct create_durable
*buf
;
1261 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1265 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1266 (struct create_durable
, Data
));
1267 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1268 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1269 (struct create_durable
, Name
));
1270 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1271 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1272 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1273 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1282 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1283 unsigned int *epoch
)
1286 struct create_context
*cc
;
1288 unsigned int remaining
;
1291 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
1292 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
1293 cc
= (struct create_context
*)data_offset
;
1294 while (remaining
>= sizeof(struct create_context
)) {
1295 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1296 if (le16_to_cpu(cc
->NameLength
) == 4 &&
1297 strncmp(name
, "RqLs", 4) == 0)
1298 return server
->ops
->parse_lease_buf(cc
, epoch
);
1300 next
= le32_to_cpu(cc
->Next
);
1304 cc
= (struct create_context
*)((char *)cc
+ next
);
1311 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1312 unsigned int *num_iovec
, __u8
*oplock
)
1314 struct smb2_create_req
*req
= iov
[0].iov_base
;
1315 unsigned int num
= *num_iovec
;
1317 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1318 if (iov
[num
].iov_base
== NULL
)
1320 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1321 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1322 if (!req
->CreateContextsOffset
)
1323 req
->CreateContextsOffset
= cpu_to_le32(
1324 sizeof(struct smb2_create_req
) - 4 +
1325 iov
[num
- 1].iov_len
);
1326 le32_add_cpu(&req
->CreateContextsLength
,
1327 server
->vals
->create_lease_size
);
1328 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
1329 *num_iovec
= num
+ 1;
1333 static struct create_durable_v2
*
1334 create_durable_v2_buf(struct cifs_fid
*pfid
)
1336 struct create_durable_v2
*buf
;
1338 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1342 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1343 (struct create_durable_v2
, dcontext
));
1344 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1345 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1346 (struct create_durable_v2
, Name
));
1347 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1349 buf
->dcontext
.Timeout
= 0; /* Should this be configurable by workload */
1350 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1351 generate_random_uuid(buf
->dcontext
.CreateGuid
);
1352 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1354 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1362 static struct create_durable_handle_reconnect_v2
*
1363 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1365 struct create_durable_handle_reconnect_v2
*buf
;
1367 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1372 buf
->ccontext
.DataOffset
=
1373 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1375 buf
->ccontext
.DataLength
=
1376 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1377 buf
->ccontext
.NameOffset
=
1378 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1380 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1382 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1383 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1384 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1385 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1387 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1396 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1397 struct cifs_open_parms
*oparms
)
1399 struct smb2_create_req
*req
= iov
[0].iov_base
;
1400 unsigned int num
= *num_iovec
;
1402 iov
[num
].iov_base
= create_durable_v2_buf(oparms
->fid
);
1403 if (iov
[num
].iov_base
== NULL
)
1405 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1406 if (!req
->CreateContextsOffset
)
1407 req
->CreateContextsOffset
=
1408 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1410 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1411 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable_v2
));
1412 *num_iovec
= num
+ 1;
1417 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1418 struct cifs_open_parms
*oparms
)
1420 struct smb2_create_req
*req
= iov
[0].iov_base
;
1421 unsigned int num
= *num_iovec
;
1423 /* indicate that we don't need to relock the file */
1424 oparms
->reconnect
= false;
1426 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1427 if (iov
[num
].iov_base
== NULL
)
1429 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1430 if (!req
->CreateContextsOffset
)
1431 req
->CreateContextsOffset
=
1432 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1434 le32_add_cpu(&req
->CreateContextsLength
,
1435 sizeof(struct create_durable_handle_reconnect_v2
));
1436 inc_rfc1001_len(&req
->hdr
,
1437 sizeof(struct create_durable_handle_reconnect_v2
));
1438 *num_iovec
= num
+ 1;
1443 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1444 struct cifs_open_parms
*oparms
, bool use_persistent
)
1446 struct smb2_create_req
*req
= iov
[0].iov_base
;
1447 unsigned int num
= *num_iovec
;
1449 if (use_persistent
) {
1450 if (oparms
->reconnect
)
1451 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1454 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1457 if (oparms
->reconnect
) {
1458 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1459 /* indicate that we don't need to relock the file */
1460 oparms
->reconnect
= false;
1462 iov
[num
].iov_base
= create_durable_buf();
1463 if (iov
[num
].iov_base
== NULL
)
1465 iov
[num
].iov_len
= sizeof(struct create_durable
);
1466 if (!req
->CreateContextsOffset
)
1467 req
->CreateContextsOffset
=
1468 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1470 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1471 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
1472 *num_iovec
= num
+ 1;
1477 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1478 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1479 struct smb2_err_rsp
**err_buf
)
1481 struct smb2_create_req
*req
;
1482 struct smb2_create_rsp
*rsp
;
1483 struct TCP_Server_Info
*server
;
1484 struct cifs_tcon
*tcon
= oparms
->tcon
;
1485 struct cifs_ses
*ses
= tcon
->ses
;
1487 struct kvec rsp_iov
;
1490 __le16
*copy_path
= NULL
;
1493 unsigned int n_iov
= 2;
1494 __u32 file_attributes
= 0;
1495 char *dhc_buf
= NULL
, *lc_buf
= NULL
;
1497 cifs_dbg(FYI
, "create/open\n");
1499 if (ses
&& (ses
->server
))
1500 server
= ses
->server
;
1504 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1508 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1509 file_attributes
|= ATTR_READONLY
;
1510 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
1511 file_attributes
|= ATTR_SYSTEM
;
1513 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1514 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1515 /* File attributes ignored on open (used in create though) */
1516 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1517 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1518 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1519 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1520 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1521 /* do not count rfc1001 len field */
1522 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
1524 iov
[0].iov_base
= (char *)req
;
1525 /* 4 for rfc1002 length field */
1526 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1528 /* MUST set path len (NameLength) to 0 opening root of share */
1529 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1530 /* -1 since last byte is buf[0] which is sent below (path) */
1532 if (uni_path_len
% 8 != 0) {
1533 copy_size
= uni_path_len
/ 8 * 8;
1534 if (copy_size
< uni_path_len
)
1537 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1540 memcpy((char *)copy_path
, (const char *)path
,
1542 uni_path_len
= copy_size
;
1546 iov
[1].iov_len
= uni_path_len
;
1547 iov
[1].iov_base
= path
;
1548 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1549 inc_rfc1001_len(req
, uni_path_len
- 1);
1551 if (!server
->oplocks
)
1552 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1554 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1555 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1556 req
->RequestedOplockLevel
= *oplock
;
1558 rc
= add_lease_context(server
, iov
, &n_iov
, oplock
);
1560 cifs_small_buf_release(req
);
1564 lc_buf
= iov
[n_iov
-1].iov_base
;
1567 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1568 /* need to set Next field of lease context if we request it */
1569 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
1570 struct create_context
*ccontext
=
1571 (struct create_context
*)iov
[n_iov
-1].iov_base
;
1573 cpu_to_le32(server
->vals
->create_lease_size
);
1576 rc
= add_durable_context(iov
, &n_iov
, oparms
,
1577 tcon
->use_persistent
);
1579 cifs_small_buf_release(req
);
1584 dhc_buf
= iov
[n_iov
-1].iov_base
;
1587 rc
= SendReceive2(xid
, ses
, iov
, n_iov
, &resp_buftype
, 0, &rsp_iov
);
1588 cifs_small_buf_release(req
);
1589 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
1592 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1594 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1599 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1600 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1603 memcpy(buf
, &rsp
->CreationTime
, 32);
1604 buf
->AllocationSize
= rsp
->AllocationSize
;
1605 buf
->EndOfFile
= rsp
->EndofFile
;
1606 buf
->Attributes
= rsp
->FileAttributes
;
1607 buf
->NumberOfLinks
= cpu_to_le32(1);
1608 buf
->DeletePending
= 0;
1611 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1612 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1614 *oplock
= rsp
->OplockLevel
;
1619 free_rsp_buf(resp_buftype
, rsp
);
1624 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1627 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1628 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, char *in_data
,
1629 u32 indatalen
, char **out_data
, u32
*plen
/* returned data len */)
1631 struct smb2_ioctl_req
*req
;
1632 struct smb2_ioctl_rsp
*rsp
;
1633 struct smb2_sync_hdr
*shdr
;
1634 struct TCP_Server_Info
*server
;
1635 struct cifs_ses
*ses
;
1637 struct kvec rsp_iov
;
1642 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1644 if (out_data
!= NULL
)
1647 /* zero out returned data len, in case of error */
1656 if (ses
&& (ses
->server
))
1657 server
= ses
->server
;
1661 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1665 req
->CtlCode
= cpu_to_le32(opcode
);
1666 req
->PersistentFileId
= persistent_fid
;
1667 req
->VolatileFileId
= volatile_fid
;
1670 req
->InputCount
= cpu_to_le32(indatalen
);
1671 /* do not set InputOffset if no input data */
1673 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1674 iov
[1].iov_base
= in_data
;
1675 iov
[1].iov_len
= indatalen
;
1680 req
->OutputOffset
= 0;
1681 req
->OutputCount
= 0; /* MBZ */
1684 * Could increase MaxOutputResponse, but that would require more
1685 * than one credit. Windows typically sets this smaller, but for some
1686 * ioctls it may be useful to allow server to send more. No point
1687 * limiting what the server can send as long as fits in one credit
1689 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1692 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1696 iov
[0].iov_base
= (char *)req
;
1699 * If no input data, the size of ioctl struct in
1700 * protocol spec still includes a 1 byte data buffer,
1701 * but if input data passed to ioctl, we do not
1702 * want to double count this, so we do not send
1703 * the dummy one byte of data in iovec[0] if sending
1704 * input data (in iovec[1]). We also must add 4 bytes
1705 * in first iovec to allow for rfc1002 length field.
1709 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1710 inc_rfc1001_len(req
, indatalen
- 1);
1712 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1715 rc
= SendReceive2(xid
, ses
, iov
, n_iov
, &resp_buftype
, 0, &rsp_iov
);
1716 cifs_small_buf_release(req
);
1717 rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
.iov_base
;
1719 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
1720 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1722 } else if (rc
== -EINVAL
) {
1723 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
1724 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
1725 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1730 /* check if caller wants to look at return data or just return rc */
1731 if ((plen
== NULL
) || (out_data
== NULL
))
1734 *plen
= le32_to_cpu(rsp
->OutputCount
);
1736 /* We check for obvious errors in the output buffer length and offset */
1738 goto ioctl_exit
; /* server returned no data */
1739 else if (*plen
> 0xFF00) {
1740 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1746 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1747 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1748 le32_to_cpu(rsp
->OutputOffset
));
1754 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1755 if (*out_data
== NULL
) {
1760 shdr
= get_sync_hdr(rsp
);
1761 memcpy(*out_data
, (char *)shdr
+ le32_to_cpu(rsp
->OutputOffset
), *plen
);
1763 free_rsp_buf(resp_buftype
, rsp
);
1768 * Individual callers to ioctl worker function follow
1772 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
1773 u64 persistent_fid
, u64 volatile_fid
)
1776 struct compress_ioctl fsctl_input
;
1777 char *ret_data
= NULL
;
1779 fsctl_input
.CompressionState
=
1780 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
1782 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
1783 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
1784 (char *)&fsctl_input
/* data input */,
1785 2 /* in data len */, &ret_data
/* out data */, NULL
);
1787 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
1793 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1794 u64 persistent_fid
, u64 volatile_fid
)
1796 struct smb2_close_req
*req
;
1797 struct smb2_close_rsp
*rsp
;
1798 struct TCP_Server_Info
*server
;
1799 struct cifs_ses
*ses
= tcon
->ses
;
1801 struct kvec rsp_iov
;
1805 cifs_dbg(FYI
, "Close\n");
1807 if (ses
&& (ses
->server
))
1808 server
= ses
->server
;
1812 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1816 req
->PersistentFileId
= persistent_fid
;
1817 req
->VolatileFileId
= volatile_fid
;
1819 iov
[0].iov_base
= (char *)req
;
1820 /* 4 for rfc1002 length field */
1821 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1823 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0, &rsp_iov
);
1824 cifs_small_buf_release(req
);
1825 rsp
= (struct smb2_close_rsp
*)rsp_iov
.iov_base
;
1828 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1832 /* BB FIXME - decode close response, update inode for caching */
1835 free_rsp_buf(resp_buftype
, rsp
);
1840 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1841 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1844 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1845 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1846 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1847 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1850 if (buffer_length
< min_buf_size
) {
1851 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1852 buffer_length
, min_buf_size
);
1856 /* check if beyond RFC1001 maximum length */
1857 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1858 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1859 buffer_length
, smb_len
);
1863 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1864 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1872 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1873 * Caller must free buffer.
1876 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1877 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1881 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1887 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1891 memcpy(data
, begin_of_buf
, buffer_length
);
1897 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1898 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1899 size_t output_len
, size_t min_len
, void *data
)
1901 struct smb2_query_info_req
*req
;
1902 struct smb2_query_info_rsp
*rsp
= NULL
;
1904 struct kvec rsp_iov
;
1907 struct TCP_Server_Info
*server
;
1908 struct cifs_ses
*ses
= tcon
->ses
;
1910 cifs_dbg(FYI
, "Query Info\n");
1912 if (ses
&& (ses
->server
))
1913 server
= ses
->server
;
1917 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1921 req
->InfoType
= SMB2_O_INFO_FILE
;
1922 req
->FileInfoClass
= info_class
;
1923 req
->PersistentFileId
= persistent_fid
;
1924 req
->VolatileFileId
= volatile_fid
;
1925 /* 4 for rfc1002 length field and 1 for Buffer */
1926 req
->InputBufferOffset
=
1927 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1928 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1930 iov
[0].iov_base
= (char *)req
;
1931 /* 4 for rfc1002 length field */
1932 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1934 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0, &rsp_iov
);
1935 cifs_small_buf_release(req
);
1936 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
1939 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1943 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1944 le32_to_cpu(rsp
->OutputBufferLength
),
1945 &rsp
->hdr
, min_len
, data
);
1948 free_rsp_buf(resp_buftype
, rsp
);
1953 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1954 u64 persistent_fid
, u64 volatile_fid
,
1955 struct smb2_file_all_info
*data
)
1957 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1958 FILE_ALL_INFORMATION
,
1959 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
1960 sizeof(struct smb2_file_all_info
), data
);
1964 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1965 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1967 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1968 FILE_INTERNAL_INFORMATION
,
1969 sizeof(struct smb2_file_internal_info
),
1970 sizeof(struct smb2_file_internal_info
), uniqueid
);
1974 * This is a no-op for now. We're not really interested in the reply, but
1975 * rather in the fact that the server sent one and that server->lstrp
1978 * FIXME: maybe we should consider checking that the reply matches request?
1981 smb2_echo_callback(struct mid_q_entry
*mid
)
1983 struct TCP_Server_Info
*server
= mid
->callback_data
;
1984 struct smb2_echo_rsp
*rsp
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1985 unsigned int credits_received
= 1;
1987 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1988 credits_received
= le16_to_cpu(rsp
->hdr
.sync_hdr
.CreditRequest
);
1990 mutex_lock(&server
->srv_mutex
);
1991 DeleteMidQEntry(mid
);
1992 mutex_unlock(&server
->srv_mutex
);
1993 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1996 void smb2_reconnect_server(struct work_struct
*work
)
1998 struct TCP_Server_Info
*server
= container_of(work
,
1999 struct TCP_Server_Info
, reconnect
.work
);
2000 struct cifs_ses
*ses
;
2001 struct cifs_tcon
*tcon
, *tcon2
;
2002 struct list_head tmp_list
;
2003 int tcon_exist
= false;
2005 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2006 mutex_lock(&server
->reconnect_mutex
);
2008 INIT_LIST_HEAD(&tmp_list
);
2009 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
2011 spin_lock(&cifs_tcp_ses_lock
);
2012 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
2013 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
2014 if (tcon
->need_reconnect
|| tcon
->need_reopen_files
) {
2016 list_add_tail(&tcon
->rlist
, &tmp_list
);
2022 * Get the reference to server struct to be sure that the last call of
2023 * cifs_put_tcon() in the loop below won't release the server pointer.
2026 server
->srv_count
++;
2028 spin_unlock(&cifs_tcp_ses_lock
);
2030 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
2031 if (!smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
))
2032 cifs_reopen_persistent_handles(tcon
);
2033 list_del_init(&tcon
->rlist
);
2034 cifs_put_tcon(tcon
);
2037 cifs_dbg(FYI
, "Reconnecting tcons finished\n");
2038 mutex_unlock(&server
->reconnect_mutex
);
2040 /* now we can safely release srv struct */
2042 cifs_put_tcp_session(server
, 1);
2046 SMB2_echo(struct TCP_Server_Info
*server
)
2048 struct smb2_echo_req
*req
;
2051 struct smb_rqst rqst
= { .rq_iov
= iov
,
2054 cifs_dbg(FYI
, "In echo request\n");
2056 if (server
->tcpStatus
== CifsNeedNegotiate
) {
2057 /* No need to send echo on newly established connections */
2058 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
2062 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
2066 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
2068 /* 4 for rfc1002 length field */
2070 iov
[0].iov_base
= (char *)req
;
2071 iov
[1].iov_len
= get_rfc1002_length(req
);
2072 iov
[1].iov_base
= (char *)req
+ 4;
2074 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
2077 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
2079 cifs_small_buf_release(req
);
2084 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2087 struct smb2_flush_req
*req
;
2088 struct TCP_Server_Info
*server
;
2089 struct cifs_ses
*ses
= tcon
->ses
;
2091 struct kvec rsp_iov
;
2095 cifs_dbg(FYI
, "Flush\n");
2097 if (ses
&& (ses
->server
))
2098 server
= ses
->server
;
2102 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
2106 req
->PersistentFileId
= persistent_fid
;
2107 req
->VolatileFileId
= volatile_fid
;
2109 iov
[0].iov_base
= (char *)req
;
2110 /* 4 for rfc1002 length field */
2111 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2113 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0, &rsp_iov
);
2114 cifs_small_buf_release(req
);
2117 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
2119 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2124 * To form a chain of read requests, any read requests after the first should
2125 * have the end_of_chain boolean set to true.
2128 smb2_new_read_req(void **buf
, unsigned int *total_len
,
2129 struct cifs_io_parms
*io_parms
, unsigned int remaining_bytes
,
2133 struct smb2_read_req
*req
= NULL
;
2134 struct smb2_sync_hdr
*shdr
;
2136 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
2139 if (io_parms
->tcon
->ses
->server
== NULL
)
2140 return -ECONNABORTED
;
2142 shdr
= get_sync_hdr(req
);
2143 shdr
->ProcessId
= cpu_to_le32(io_parms
->pid
);
2145 req
->PersistentFileId
= io_parms
->persistent_fid
;
2146 req
->VolatileFileId
= io_parms
->volatile_fid
;
2147 req
->ReadChannelInfoOffset
= 0; /* reserved */
2148 req
->ReadChannelInfoLength
= 0; /* reserved */
2149 req
->Channel
= 0; /* reserved */
2150 req
->MinimumCount
= 0;
2151 req
->Length
= cpu_to_le32(io_parms
->length
);
2152 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2154 if (request_type
& CHAINED_REQUEST
) {
2155 if (!(request_type
& END_OF_CHAIN
)) {
2156 /* 4 for rfc1002 length field */
2158 cpu_to_le32(get_rfc1002_length(req
) + 4);
2159 } else /* END_OF_CHAIN */
2160 shdr
->NextCommand
= 0;
2161 if (request_type
& RELATED_REQUEST
) {
2162 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
2164 * Related requests use info from previous read request
2167 shdr
->SessionId
= 0xFFFFFFFF;
2168 shdr
->TreeId
= 0xFFFFFFFF;
2169 req
->PersistentFileId
= 0xFFFFFFFF;
2170 req
->VolatileFileId
= 0xFFFFFFFF;
2173 if (remaining_bytes
> io_parms
->length
)
2174 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
2176 req
->RemainingBytes
= 0;
2179 /* 4 for rfc1002 length field */
2180 *total_len
= get_rfc1002_length(req
) + 4;
2185 smb2_readv_callback(struct mid_q_entry
*mid
)
2187 struct cifs_readdata
*rdata
= mid
->callback_data
;
2188 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2189 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2190 struct smb2_sync_hdr
*shdr
=
2191 (struct smb2_sync_hdr
*)rdata
->iov
[1].iov_base
;
2192 unsigned int credits_received
= 1;
2193 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2195 .rq_pages
= rdata
->pages
,
2196 .rq_npages
= rdata
->nr_pages
,
2197 .rq_pagesz
= rdata
->pagesz
,
2198 .rq_tailsz
= rdata
->tailsz
};
2200 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2201 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
2204 switch (mid
->mid_state
) {
2205 case MID_RESPONSE_RECEIVED
:
2206 credits_received
= le16_to_cpu(shdr
->CreditRequest
);
2207 /* result already set, check signature */
2211 rc
= smb2_verify_signature(&rqst
, server
);
2213 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
2216 /* FIXME: should this be counted toward the initiating task? */
2217 task_io_account_read(rdata
->got_bytes
);
2218 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2220 case MID_REQUEST_SUBMITTED
:
2221 case MID_RETRY_NEEDED
:
2222 rdata
->result
= -EAGAIN
;
2223 if (server
->sign
&& rdata
->got_bytes
)
2224 /* reset bytes number since we can not check a sign */
2225 rdata
->got_bytes
= 0;
2226 /* FIXME: should this be counted toward the initiating task? */
2227 task_io_account_read(rdata
->got_bytes
);
2228 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2231 if (rdata
->result
!= -ENODATA
)
2232 rdata
->result
= -EIO
;
2236 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
2238 queue_work(cifsiod_wq
, &rdata
->work
);
2239 mutex_lock(&server
->srv_mutex
);
2240 DeleteMidQEntry(mid
);
2241 mutex_unlock(&server
->srv_mutex
);
2242 add_credits(server
, credits_received
, 0);
2245 /* smb2_async_readv - send an async read, and set up mid to handle result */
2247 smb2_async_readv(struct cifs_readdata
*rdata
)
2251 struct smb2_sync_hdr
*shdr
;
2252 struct cifs_io_parms io_parms
;
2253 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2255 struct TCP_Server_Info
*server
;
2256 unsigned int total_len
;
2258 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
2259 __func__
, rdata
->offset
, rdata
->bytes
);
2261 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2262 io_parms
.offset
= rdata
->offset
;
2263 io_parms
.length
= rdata
->bytes
;
2264 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
2265 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
2266 io_parms
.pid
= rdata
->pid
;
2268 server
= io_parms
.tcon
->ses
->server
;
2270 rc
= smb2_new_read_req((void **) &buf
, &total_len
, &io_parms
, 0, 0);
2272 if (rc
== -EAGAIN
&& rdata
->credits
) {
2273 /* credits was reset by reconnect */
2275 /* reduce in_flight value since we won't send the req */
2276 spin_lock(&server
->req_lock
);
2277 server
->in_flight
--;
2278 spin_unlock(&server
->req_lock
);
2283 shdr
= get_sync_hdr(buf
);
2284 /* 4 for rfc1002 length field */
2285 rdata
->iov
[0].iov_len
= 4;
2286 rdata
->iov
[0].iov_base
= buf
;
2287 rdata
->iov
[1].iov_len
= total_len
- 4;
2288 rdata
->iov
[1].iov_base
= buf
+ 4;
2290 if (rdata
->credits
) {
2291 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
2292 SMB2_MAX_BUFFER_SIZE
));
2293 shdr
->CreditRequest
= shdr
->CreditCharge
;
2294 spin_lock(&server
->req_lock
);
2295 server
->credits
+= rdata
->credits
-
2296 le16_to_cpu(shdr
->CreditCharge
);
2297 spin_unlock(&server
->req_lock
);
2298 wake_up(&server
->request_q
);
2299 flags
= CIFS_HAS_CREDITS
;
2302 kref_get(&rdata
->refcount
);
2303 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
2304 cifs_readv_receive
, smb2_readv_callback
,
2307 kref_put(&rdata
->refcount
, cifs_readdata_release
);
2308 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
2311 cifs_small_buf_release(buf
);
2316 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2317 unsigned int *nbytes
, char **buf
, int *buf_type
)
2319 int resp_buftype
, rc
= -EACCES
;
2320 struct smb2_read_rsp
*rsp
= NULL
;
2321 struct smb2_sync_hdr
*shdr
;
2323 struct kvec rsp_iov
;
2324 unsigned int total_len
;
2328 rc
= smb2_new_read_req((void **)&req
, &total_len
, io_parms
, 0, 0);
2332 iov
[0].iov_base
= buf
;
2333 iov
[0].iov_len
= total_len
;
2335 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
2336 &resp_buftype
, CIFS_LOG_ERROR
, &rsp_iov
);
2337 cifs_small_buf_release(iov
[0].iov_base
);
2339 rsp
= (struct smb2_read_rsp
*)rsp_iov
.iov_base
;
2340 shdr
= get_sync_hdr(rsp
);
2342 if (shdr
->Status
== STATUS_END_OF_FILE
) {
2343 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2348 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
2349 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
2351 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2352 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
2353 (*nbytes
> io_parms
->length
)) {
2354 cifs_dbg(FYI
, "bad length %d for count %d\n",
2355 *nbytes
, io_parms
->length
);
2362 memcpy(*buf
, (char *)shdr
+ rsp
->DataOffset
, *nbytes
);
2363 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2364 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
2365 *buf
= rsp_iov
.iov_base
;
2366 if (resp_buftype
== CIFS_SMALL_BUFFER
)
2367 *buf_type
= CIFS_SMALL_BUFFER
;
2368 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
2369 *buf_type
= CIFS_LARGE_BUFFER
;
2375 * Check the mid_state and signature on received buffer (if any), and queue the
2376 * workqueue completion task.
2379 smb2_writev_callback(struct mid_q_entry
*mid
)
2381 struct cifs_writedata
*wdata
= mid
->callback_data
;
2382 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2383 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2384 unsigned int written
;
2385 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
2386 unsigned int credits_received
= 1;
2388 switch (mid
->mid_state
) {
2389 case MID_RESPONSE_RECEIVED
:
2390 credits_received
= le16_to_cpu(rsp
->hdr
.sync_hdr
.CreditRequest
);
2391 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
2392 if (wdata
->result
!= 0)
2395 written
= le32_to_cpu(rsp
->DataLength
);
2397 * Mask off high 16 bits when bytes written as returned
2398 * by the server is greater than bytes requested by the
2399 * client. OS/2 servers are known to set incorrect
2402 if (written
> wdata
->bytes
)
2405 if (written
< wdata
->bytes
)
2406 wdata
->result
= -ENOSPC
;
2408 wdata
->bytes
= written
;
2410 case MID_REQUEST_SUBMITTED
:
2411 case MID_RETRY_NEEDED
:
2412 wdata
->result
= -EAGAIN
;
2415 wdata
->result
= -EIO
;
2420 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2422 queue_work(cifsiod_wq
, &wdata
->work
);
2423 mutex_lock(&server
->srv_mutex
);
2424 DeleteMidQEntry(mid
);
2425 mutex_unlock(&server
->srv_mutex
);
2426 add_credits(tcon
->ses
->server
, credits_received
, 0);
2429 /* smb2_async_writev - send an async write, and set up mid to handle result */
2431 smb2_async_writev(struct cifs_writedata
*wdata
,
2432 void (*release
)(struct kref
*kref
))
2434 int rc
= -EACCES
, flags
= 0;
2435 struct smb2_write_req
*req
= NULL
;
2436 struct smb2_sync_hdr
*shdr
;
2437 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2438 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2440 struct smb_rqst rqst
= { };
2442 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
2444 if (rc
== -EAGAIN
&& wdata
->credits
) {
2445 /* credits was reset by reconnect */
2447 /* reduce in_flight value since we won't send the req */
2448 spin_lock(&server
->req_lock
);
2449 server
->in_flight
--;
2450 spin_unlock(&server
->req_lock
);
2452 goto async_writev_out
;
2455 shdr
= get_sync_hdr(req
);
2456 shdr
->ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
2458 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
2459 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
2460 req
->WriteChannelInfoOffset
= 0;
2461 req
->WriteChannelInfoLength
= 0;
2463 req
->Offset
= cpu_to_le64(wdata
->offset
);
2464 /* 4 for rfc1002 length field */
2465 req
->DataOffset
= cpu_to_le16(
2466 offsetof(struct smb2_write_req
, Buffer
) - 4);
2467 req
->RemainingBytes
= 0;
2469 /* 4 for rfc1002 length field and 1 for Buffer */
2471 iov
[0].iov_base
= req
;
2472 iov
[1].iov_len
= get_rfc1002_length(req
) - 1;
2473 iov
[1].iov_base
= (char *)req
+ 4;
2477 rqst
.rq_pages
= wdata
->pages
;
2478 rqst
.rq_npages
= wdata
->nr_pages
;
2479 rqst
.rq_pagesz
= wdata
->pagesz
;
2480 rqst
.rq_tailsz
= wdata
->tailsz
;
2482 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
2483 wdata
->offset
, wdata
->bytes
);
2485 req
->Length
= cpu_to_le32(wdata
->bytes
);
2487 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
2489 if (wdata
->credits
) {
2490 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
2491 SMB2_MAX_BUFFER_SIZE
));
2492 shdr
->CreditRequest
= shdr
->CreditCharge
;
2493 spin_lock(&server
->req_lock
);
2494 server
->credits
+= wdata
->credits
-
2495 le16_to_cpu(shdr
->CreditCharge
);
2496 spin_unlock(&server
->req_lock
);
2497 wake_up(&server
->request_q
);
2498 flags
= CIFS_HAS_CREDITS
;
2501 kref_get(&wdata
->refcount
);
2502 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, wdata
,
2506 kref_put(&wdata
->refcount
, release
);
2507 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2511 cifs_small_buf_release(req
);
2516 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2517 * The length field from io_parms must be at least 1 and indicates a number of
2518 * elements with data to write that begins with position 1 in iov array. All
2519 * data length is specified by count.
2522 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2523 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
2526 struct smb2_write_req
*req
= NULL
;
2527 struct smb2_write_rsp
*rsp
= NULL
;
2529 struct kvec rsp_iov
;
2536 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
2540 if (io_parms
->tcon
->ses
->server
== NULL
)
2541 return -ECONNABORTED
;
2543 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
2545 req
->PersistentFileId
= io_parms
->persistent_fid
;
2546 req
->VolatileFileId
= io_parms
->volatile_fid
;
2547 req
->WriteChannelInfoOffset
= 0;
2548 req
->WriteChannelInfoLength
= 0;
2550 req
->Length
= cpu_to_le32(io_parms
->length
);
2551 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2552 /* 4 for rfc1002 length field */
2553 req
->DataOffset
= cpu_to_le16(
2554 offsetof(struct smb2_write_req
, Buffer
) - 4);
2555 req
->RemainingBytes
= 0;
2557 iov
[0].iov_base
= (char *)req
;
2558 /* 4 for rfc1002 length field and 1 for Buffer */
2559 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2561 /* length of entire message including data to be written */
2562 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
2564 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
2565 &resp_buftype
, 0, &rsp_iov
);
2566 cifs_small_buf_release(req
);
2567 rsp
= (struct smb2_write_rsp
*)rsp_iov
.iov_base
;
2570 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
2571 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
2573 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2575 free_rsp_buf(resp_buftype
, rsp
);
2580 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
2583 unsigned int entrycount
= 0;
2584 unsigned int next_offset
= 0;
2585 FILE_DIRECTORY_INFO
*entryptr
;
2587 if (bufstart
== NULL
)
2590 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
2593 entryptr
= (FILE_DIRECTORY_INFO
*)
2594 ((char *)entryptr
+ next_offset
);
2596 if ((char *)entryptr
+ size
> end_of_buf
) {
2597 cifs_dbg(VFS
, "malformed search entry would overflow\n");
2601 len
= le32_to_cpu(entryptr
->FileNameLength
);
2602 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
2603 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
2608 *lastentry
= (char *)entryptr
;
2611 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
2623 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
2624 u64 persistent_fid
, u64 volatile_fid
, int index
,
2625 struct cifs_search_info
*srch_inf
)
2627 struct smb2_query_directory_req
*req
;
2628 struct smb2_query_directory_rsp
*rsp
= NULL
;
2630 struct kvec rsp_iov
;
2633 int resp_buftype
= CIFS_NO_BUFFER
;
2634 unsigned char *bufptr
;
2635 struct TCP_Server_Info
*server
;
2636 struct cifs_ses
*ses
= tcon
->ses
;
2637 __le16 asteriks
= cpu_to_le16('*');
2639 unsigned int output_size
= CIFSMaxBufSize
;
2640 size_t info_buf_size
;
2642 if (ses
&& (ses
->server
))
2643 server
= ses
->server
;
2647 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
2651 switch (srch_inf
->info_level
) {
2652 case SMB_FIND_FILE_DIRECTORY_INFO
:
2653 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
2654 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
2656 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
2657 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
2658 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
2661 cifs_dbg(VFS
, "info level %u isn't supported\n",
2662 srch_inf
->info_level
);
2667 req
->FileIndex
= cpu_to_le32(index
);
2668 req
->PersistentFileId
= persistent_fid
;
2669 req
->VolatileFileId
= volatile_fid
;
2672 bufptr
= req
->Buffer
;
2673 memcpy(bufptr
, &asteriks
, len
);
2675 req
->FileNameOffset
=
2676 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
2677 req
->FileNameLength
= cpu_to_le16(len
);
2679 * BB could be 30 bytes or so longer if we used SMB2 specific
2680 * buffer lengths, but this is safe and close enough.
2682 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
2683 output_size
= min_t(unsigned int, output_size
, 2 << 15);
2684 req
->OutputBufferLength
= cpu_to_le32(output_size
);
2686 iov
[0].iov_base
= (char *)req
;
2687 /* 4 for RFC1001 length and 1 for Buffer */
2688 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2690 iov
[1].iov_base
= (char *)(req
->Buffer
);
2691 iov
[1].iov_len
= len
;
2693 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
2695 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0, &rsp_iov
);
2696 cifs_small_buf_release(req
);
2697 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
.iov_base
;
2700 if (rc
== -ENODATA
&&
2701 rsp
->hdr
.sync_hdr
.Status
== STATUS_NO_MORE_FILES
) {
2702 srch_inf
->endOfSearch
= true;
2705 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
2709 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2710 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2715 srch_inf
->unicode
= true;
2717 if (srch_inf
->ntwrk_buf_start
) {
2718 if (srch_inf
->smallBuf
)
2719 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
2721 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
2723 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
2724 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
2725 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
2726 /* 4 for rfc1002 length field */
2727 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
2728 srch_inf
->entries_in_buffer
=
2729 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
2730 &srch_inf
->last_entry
, info_buf_size
);
2731 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
2732 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
2733 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
2734 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
2735 if (resp_buftype
== CIFS_LARGE_BUFFER
)
2736 srch_inf
->smallBuf
= false;
2737 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
2738 srch_inf
->smallBuf
= true;
2740 cifs_dbg(VFS
, "illegal search buffer type\n");
2745 free_rsp_buf(resp_buftype
, rsp
);
2750 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2751 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
2752 unsigned int num
, void **data
, unsigned int *size
)
2754 struct smb2_set_info_req
*req
;
2755 struct smb2_set_info_rsp
*rsp
= NULL
;
2757 struct kvec rsp_iov
;
2761 struct TCP_Server_Info
*server
;
2762 struct cifs_ses
*ses
= tcon
->ses
;
2764 if (ses
&& (ses
->server
))
2765 server
= ses
->server
;
2772 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
2776 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
2782 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(pid
);
2784 req
->InfoType
= SMB2_O_INFO_FILE
;
2785 req
->FileInfoClass
= info_class
;
2786 req
->PersistentFileId
= persistent_fid
;
2787 req
->VolatileFileId
= volatile_fid
;
2789 /* 4 for RFC1001 length and 1 for Buffer */
2791 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
2792 req
->BufferLength
= cpu_to_le32(*size
);
2794 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
2796 memcpy(req
->Buffer
, *data
, *size
);
2798 iov
[0].iov_base
= (char *)req
;
2799 /* 4 for RFC1001 length */
2800 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2802 for (i
= 1; i
< num
; i
++) {
2803 inc_rfc1001_len(req
, size
[i
]);
2804 le32_add_cpu(&req
->BufferLength
, size
[i
]);
2805 iov
[i
].iov_base
= (char *)data
[i
];
2806 iov
[i
].iov_len
= size
[i
];
2809 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0, &rsp_iov
);
2810 cifs_small_buf_release(req
);
2811 rsp
= (struct smb2_set_info_rsp
*)rsp_iov
.iov_base
;
2814 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
2816 free_rsp_buf(resp_buftype
, rsp
);
2822 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
2823 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2825 struct smb2_file_rename_info info
;
2827 unsigned int size
[2];
2829 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2831 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2835 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
2836 /* 0 = fail if target already exists */
2837 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2838 info
.FileNameLength
= cpu_to_le32(len
);
2841 size
[0] = sizeof(struct smb2_file_rename_info
);
2843 data
[1] = target_file
;
2844 size
[1] = len
+ 2 /* null */;
2846 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2847 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2854 SMB2_rmdir(const unsigned int xid
, struct cifs_tcon
*tcon
,
2855 u64 persistent_fid
, u64 volatile_fid
)
2857 __u8 delete_pending
= 1;
2861 data
= &delete_pending
;
2862 size
= 1; /* sizeof __u8 */
2864 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2865 current
->tgid
, FILE_DISPOSITION_INFORMATION
, 1, &data
,
2870 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2871 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2873 struct smb2_file_link_info info
;
2875 unsigned int size
[2];
2877 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2879 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2883 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2884 /* 0 = fail if link already exists */
2885 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2886 info
.FileNameLength
= cpu_to_le32(len
);
2889 size
[0] = sizeof(struct smb2_file_link_info
);
2891 data
[1] = target_file
;
2892 size
[1] = len
+ 2 /* null */;
2894 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2895 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2901 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2902 u64 volatile_fid
, u32 pid
, __le64
*eof
, bool is_falloc
)
2904 struct smb2_file_eof_info info
;
2908 info
.EndOfFile
= *eof
;
2911 size
= sizeof(struct smb2_file_eof_info
);
2914 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2915 pid
, FILE_ALLOCATION_INFORMATION
, 1, &data
, &size
);
2917 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2918 pid
, FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2922 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2923 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2926 size
= sizeof(FILE_BASIC_INFO
);
2927 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2928 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2929 (void **)&buf
, &size
);
2933 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2934 const u64 persistent_fid
, const u64 volatile_fid
,
2938 struct smb2_oplock_break
*req
= NULL
;
2940 cifs_dbg(FYI
, "SMB2_oplock_break\n");
2941 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2946 req
->VolatileFid
= volatile_fid
;
2947 req
->PersistentFid
= persistent_fid
;
2948 req
->OplockLevel
= oplock_level
;
2949 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
2951 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2952 cifs_small_buf_release(req
);
2955 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2956 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
2963 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2964 struct kstatfs
*kst
)
2966 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2967 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2968 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2969 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2970 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2975 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2976 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2979 struct smb2_query_info_req
*req
;
2981 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2983 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2986 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2990 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2991 req
->FileInfoClass
= level
;
2992 req
->PersistentFileId
= persistent_fid
;
2993 req
->VolatileFileId
= volatile_fid
;
2994 /* 4 for rfc1002 length field and 1 for pad */
2995 req
->InputBufferOffset
=
2996 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2997 req
->OutputBufferLength
= cpu_to_le32(
2998 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
3000 iov
->iov_base
= (char *)req
;
3001 /* 4 for rfc1002 length field */
3002 iov
->iov_len
= get_rfc1002_length(req
) + 4;
3007 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3008 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
3010 struct smb2_query_info_rsp
*rsp
= NULL
;
3012 struct kvec rsp_iov
;
3015 struct cifs_ses
*ses
= tcon
->ses
;
3016 struct smb2_fs_full_size_info
*info
= NULL
;
3018 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
3019 sizeof(struct smb2_fs_full_size_info
),
3020 persistent_fid
, volatile_fid
);
3024 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0, &rsp_iov
);
3025 cifs_small_buf_release(iov
.iov_base
);
3027 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3030 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3032 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
3033 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
3034 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
3035 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
3036 sizeof(struct smb2_fs_full_size_info
));
3038 copy_fs_info_to_kstatfs(info
, fsdata
);
3041 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3046 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
3047 u64 persistent_fid
, u64 volatile_fid
, int level
)
3049 struct smb2_query_info_rsp
*rsp
= NULL
;
3051 struct kvec rsp_iov
;
3053 int resp_buftype
, max_len
, min_len
;
3054 struct cifs_ses
*ses
= tcon
->ses
;
3055 unsigned int rsp_len
, offset
;
3057 if (level
== FS_DEVICE_INFORMATION
) {
3058 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3059 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3060 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
3061 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
3062 min_len
= MIN_FS_ATTR_INFO_SIZE
;
3063 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3064 max_len
= sizeof(struct smb3_fs_ss_info
);
3065 min_len
= sizeof(struct smb3_fs_ss_info
);
3067 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
3071 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
3072 persistent_fid
, volatile_fid
);
3076 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0, &rsp_iov
);
3077 cifs_small_buf_release(iov
.iov_base
);
3079 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3082 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3084 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
3085 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
3086 rc
= validate_buf(offset
, rsp_len
, &rsp
->hdr
, min_len
);
3090 if (level
== FS_ATTRIBUTE_INFORMATION
)
3091 memcpy(&tcon
->fsAttrInfo
, 4 /* RFC1001 len */ + offset
3092 + (char *)&rsp
->hdr
, min_t(unsigned int,
3094 else if (level
== FS_DEVICE_INFORMATION
)
3095 memcpy(&tcon
->fsDevInfo
, 4 /* RFC1001 len */ + offset
3096 + (char *)&rsp
->hdr
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
3097 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3098 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
3099 (4 /* RFC1001 len */ + offset
+ (char *)&rsp
->hdr
);
3100 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
3101 tcon
->perf_sector_size
=
3102 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
3106 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3111 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
3112 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3113 const __u32 num_lock
, struct smb2_lock_element
*buf
)
3116 struct smb2_lock_req
*req
= NULL
;
3118 struct kvec rsp_iov
;
3122 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
3124 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
3128 req
->hdr
.sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3129 req
->LockCount
= cpu_to_le16(num_lock
);
3131 req
->PersistentFileId
= persist_fid
;
3132 req
->VolatileFileId
= volatile_fid
;
3134 count
= num_lock
* sizeof(struct smb2_lock_element
);
3135 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
3137 iov
[0].iov_base
= (char *)req
;
3138 /* 4 for rfc1002 length field and count for all locks */
3139 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
3140 iov
[1].iov_base
= (char *)buf
;
3141 iov
[1].iov_len
= count
;
3143 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
3144 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
,
3146 cifs_small_buf_release(req
);
3148 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
3149 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
3156 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
3157 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3158 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
3161 struct smb2_lock_element lock
;
3163 lock
.Offset
= cpu_to_le64(offset
);
3164 lock
.Length
= cpu_to_le64(length
);
3165 lock
.Flags
= cpu_to_le32(lock_flags
);
3166 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
3167 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
3169 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
3173 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3174 __u8
*lease_key
, const __le32 lease_state
)
3177 struct smb2_lease_ack
*req
= NULL
;
3179 cifs_dbg(FYI
, "SMB2_lease_break\n");
3180 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
3185 req
->hdr
.sync_hdr
.CreditRequest
= cpu_to_le16(1);
3186 req
->StructureSize
= cpu_to_le16(36);
3187 inc_rfc1001_len(req
, 12);
3189 memcpy(req
->LeaseKey
, lease_key
, 16);
3190 req
->LeaseState
= lease_state
;
3192 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
3193 cifs_small_buf_release(req
);
3196 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3197 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);