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 char *temp
= (char *)hdr
;
87 /* lookup word count ie StructureSize from table */
88 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_cmd
)];
91 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
92 * largest operations (Create)
96 /* Note this is only network field converted to big endian */
97 hdr
->smb2_buf_length
= cpu_to_be32(parmsize
+ sizeof(struct smb2_hdr
)
98 - 4 /* RFC 1001 length field itself not counted */);
100 hdr
->ProtocolId
= SMB2_PROTO_NUMBER
;
101 hdr
->StructureSize
= cpu_to_le16(64);
102 hdr
->Command
= smb2_cmd
;
103 hdr
->CreditRequest
= cpu_to_le16(2); /* BB make this dynamic */
104 hdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
109 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
110 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
111 if ((tcon
->ses
) && (tcon
->ses
->server
) &&
112 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
113 hdr
->CreditCharge
= cpu_to_le16(1);
114 /* else CreditCharge MBZ */
116 hdr
->TreeId
= tcon
->tid
;
117 /* Uid is not converted */
119 hdr
->SessionId
= tcon
->ses
->Suid
;
122 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
123 * to pass the path on the Open SMB prefixed by \\server\share.
124 * Not sure when we would need to do the augmented path (if ever) and
125 * setting this flag breaks the SMB2 open operation since it is
126 * illegal to send an empty path name (without \\server\share prefix)
127 * when the DFS flag is set in the SMB open header. We could
128 * consider setting the flag on all operations other than open
129 * but it is safer to net set it for now.
131 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
132 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
134 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
)
135 hdr
->Flags
|= SMB2_FLAGS_SIGNED
;
137 pdu
->StructureSize2
= cpu_to_le16(parmsize
);
142 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
145 struct nls_table
*nls_codepage
;
146 struct cifs_ses
*ses
;
147 struct TCP_Server_Info
*server
;
150 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
151 * check for tcp and smb session status done differently
152 * for those three - in the calling routine.
157 if (smb2_command
== SMB2_TREE_CONNECT
)
160 if (tcon
->tidStatus
== CifsExiting
) {
162 * only tree disconnect, open, and write,
163 * (and ulogoff which does not have tcon)
164 * are allowed as we start force umount.
166 if ((smb2_command
!= SMB2_WRITE
) &&
167 (smb2_command
!= SMB2_CREATE
) &&
168 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
169 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
174 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
175 (!tcon
->ses
->server
))
179 server
= ses
->server
;
182 * Give demultiplex thread up to 10 seconds to reconnect, should be
183 * greater than cifs socket timeout which is 7 seconds
185 while (server
->tcpStatus
== CifsNeedReconnect
) {
187 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
188 * here since they are implicitly done when session drops.
190 switch (smb2_command
) {
192 * BB Should we keep oplock break and add flush to exceptions?
194 case SMB2_TREE_DISCONNECT
:
197 case SMB2_OPLOCK_BREAK
:
201 wait_event_interruptible_timeout(server
->response_q
,
202 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
204 /* are we still trying to reconnect? */
205 if (server
->tcpStatus
!= CifsNeedReconnect
)
209 * on "soft" mounts we wait once. Hard mounts keep
210 * retrying until process is killed or server comes
214 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
219 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
222 nls_codepage
= load_nls_default();
225 * need to prevent multiple threads trying to simultaneously reconnect
226 * the same SMB session
228 mutex_lock(&tcon
->ses
->session_mutex
);
229 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
230 if (!rc
&& tcon
->ses
->need_reconnect
)
231 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
233 if (rc
|| !tcon
->need_reconnect
) {
234 mutex_unlock(&tcon
->ses
->session_mutex
);
238 cifs_mark_open_files_invalid(tcon
);
239 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
240 mutex_unlock(&tcon
->ses
->session_mutex
);
241 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
244 atomic_inc(&tconInfoReconnectCount
);
247 * Check if handle based operation so we know whether we can continue
248 * or not without returning to caller to reset file handle.
251 * BB Is flush done by server on drop of tcp session? Should we special
252 * case it and skip above?
254 switch (smb2_command
) {
260 case SMB2_QUERY_DIRECTORY
:
261 case SMB2_CHANGE_NOTIFY
:
262 case SMB2_QUERY_INFO
:
266 unload_nls(nls_codepage
);
271 * Allocate and return pointer to an SMB request hdr, and set basic
272 * SMB information in the SMB header. If the return code is zero, this
273 * function must have filled in request_buf pointer.
276 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
281 rc
= smb2_reconnect(smb2_command
, tcon
);
285 /* BB eventually switch this to SMB2 specific small buf size */
286 *request_buf
= cifs_small_buf_get();
287 if (*request_buf
== NULL
) {
288 /* BB should we add a retry in here if not a writepage? */
292 smb2_hdr_assemble((struct smb2_hdr
*) *request_buf
, smb2_command
, tcon
);
295 #ifdef CONFIG_CIFS_STATS2
296 uint16_t com_code
= le16_to_cpu(smb2_command
);
297 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
299 cifs_stats_inc(&tcon
->num_smbs_sent
);
305 #ifdef CONFIG_CIFS_SMB311
306 /* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
307 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
310 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
311 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
314 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
316 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
317 pneg_ctxt
->DataLength
= cpu_to_le16(38);
318 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
319 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
320 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
321 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
325 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
327 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
328 pneg_ctxt
->DataLength
= cpu_to_le16(6);
329 pneg_ctxt
->CipherCount
= cpu_to_le16(2);
330 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_GCM
;
331 pneg_ctxt
->Ciphers
[1] = SMB2_ENCRYPTION_AES128_CCM
;
335 assemble_neg_contexts(struct smb2_negotiate_req
*req
)
338 /* +4 is to account for the RFC1001 len field */
339 char *pneg_ctxt
= (char *)req
+ OFFSET_OF_NEG_CONTEXT
+ 4;
341 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
342 /* Add 2 to size to round to 8 byte boundary */
343 pneg_ctxt
+= 2 + sizeof(struct smb2_preauth_neg_context
);
344 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
345 req
->NegotiateContextOffset
= cpu_to_le32(OFFSET_OF_NEG_CONTEXT
);
346 req
->NegotiateContextCount
= cpu_to_le16(2);
347 inc_rfc1001_len(req
, 4 + sizeof(struct smb2_preauth_neg_context
) + 2
348 + sizeof(struct smb2_encryption_neg_context
)); /* calculate hash */
351 static void assemble_neg_contexts(struct smb2_negotiate_req
*req
)
360 * SMB2 Worker functions follow:
362 * The general structure of the worker functions is:
363 * 1) Call smb2_init (assembles SMB2 header)
364 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
365 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
366 * 4) Decode SMB2 command specific fields in the fixed length area
367 * 5) Decode variable length data area (if any for this SMB2 command type)
368 * 6) Call free smb buffer
374 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
376 struct smb2_negotiate_req
*req
;
377 struct smb2_negotiate_rsp
*rsp
;
381 struct TCP_Server_Info
*server
= ses
->server
;
382 int blob_offset
, blob_length
;
384 int flags
= CIFS_NEG_OP
;
386 cifs_dbg(FYI
, "Negotiate protocol\n");
389 WARN(1, "%s: server is NULL!\n", __func__
);
393 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
397 req
->hdr
.SessionId
= 0;
399 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
401 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
402 inc_rfc1001_len(req
, 2);
404 /* only one of SMB2 signing flags may be set in SMB2 request */
406 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
407 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
408 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
410 req
->SecurityMode
= 0;
412 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
414 /* ClientGUID must be zero for SMB2.02 dialect */
415 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
416 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
418 memcpy(req
->ClientGUID
, server
->client_guid
,
419 SMB2_CLIENT_GUID_SIZE
);
420 if (ses
->server
->vals
->protocol_id
== SMB311_PROT_ID
)
421 assemble_neg_contexts(req
);
423 iov
[0].iov_base
= (char *)req
;
424 /* 4 for rfc1002 length field */
425 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
427 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
);
429 rsp
= (struct smb2_negotiate_rsp
*)iov
[0].iov_base
;
431 * No tcon so can't do
432 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
437 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
439 /* BB we may eventually want to match the negotiated vs. requested
440 dialect, even though we are only requesting one at a time */
441 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
442 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
443 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
444 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
445 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
446 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
447 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
448 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
449 #ifdef CONFIG_CIFS_SMB311
450 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
451 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
454 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
455 le16_to_cpu(rsp
->DialectRevision
));
459 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
461 /* SMB2 only has an extended negflavor */
462 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
463 /* set it to the maximum buffer size value we can send with 1 credit */
464 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
465 SMB2_MAX_BUFFER_SIZE
);
466 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
467 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
468 /* BB Do we need to validate the SecurityMode? */
469 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
470 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
472 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
474 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
477 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
479 * ses->sectype = RawNTLMSSP;
480 * but for time being this is our only auth choice so doesn't matter.
481 * We just found a server which sets blob length to zero expecting raw.
483 if (blob_length
== 0)
484 cifs_dbg(FYI
, "missing security blob on negprot\n");
486 rc
= cifs_enable_signing(server
, ses
->sign
);
490 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
497 free_rsp_buf(resp_buftype
, rsp
);
501 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
504 struct validate_negotiate_info_req vneg_inbuf
;
505 struct validate_negotiate_info_rsp
*pneg_rsp
;
508 cifs_dbg(FYI
, "validate negotiate\n");
511 * validation ioctl must be signed, so no point sending this if we
512 * can not sign it. We could eventually change this to selectively
513 * sign just this, the first and only signed request on a connection.
514 * This is good enough for now since a user who wants better security
515 * would also enable signing on the mount. Having validation of
516 * negotiate info for signed connections helps reduce attack vectors
518 if (tcon
->ses
->server
->sign
== false)
519 return 0; /* validation requires signing */
521 vneg_inbuf
.Capabilities
=
522 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
523 memcpy(vneg_inbuf
.Guid
, tcon
->ses
->server
->client_guid
,
524 SMB2_CLIENT_GUID_SIZE
);
527 vneg_inbuf
.SecurityMode
=
528 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
529 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
530 vneg_inbuf
.SecurityMode
=
531 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
533 vneg_inbuf
.SecurityMode
= 0;
535 vneg_inbuf
.DialectCount
= cpu_to_le16(1);
536 vneg_inbuf
.Dialects
[0] =
537 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
539 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
540 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
541 (char *)&vneg_inbuf
, sizeof(struct validate_negotiate_info_req
),
542 (char **)&pneg_rsp
, &rsplen
);
545 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
549 if (rsplen
!= sizeof(struct validate_negotiate_info_rsp
)) {
550 cifs_dbg(VFS
, "invalid size of protocol negotiate response\n");
554 /* check validate negotiate info response matches what we got earlier */
555 if (pneg_rsp
->Dialect
!=
556 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
))
559 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
562 /* do not validate server guid because not saved at negprot time yet */
564 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
565 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
568 /* validate negotiate successful */
569 cifs_dbg(FYI
, "validate negotiate info successful\n");
573 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
578 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
579 const struct nls_table
*nls_cp
)
581 struct smb2_sess_setup_req
*req
;
582 struct smb2_sess_setup_rsp
*rsp
= NULL
;
585 int resp_buftype
= CIFS_NO_BUFFER
;
586 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
587 struct TCP_Server_Info
*server
= ses
->server
;
589 struct key
*spnego_key
= NULL
;
590 char *security_blob
= NULL
;
591 char *ntlmssp_blob
= NULL
;
592 bool use_spnego
= false; /* else use raw ntlmssp */
594 cifs_dbg(FYI
, "Session Setup\n");
597 WARN(1, "%s: server is NULL!\n", __func__
);
602 * If we are here due to reconnect, free per-smb session key
603 * in case signing was required.
605 kfree(ses
->auth_key
.response
);
606 ses
->auth_key
.response
= NULL
;
609 * If memory allocation is successful, caller of this function
612 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
615 ses
->ntlmssp
->sesskey_per_smbsess
= true;
617 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
618 if (ses
->sectype
!= Kerberos
&& ses
->sectype
!= RawNTLMSSP
)
619 ses
->sectype
= RawNTLMSSP
;
621 ssetup_ntlmssp_authenticate
:
622 if (phase
== NtLmChallenge
)
623 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
625 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
629 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
630 req
->Flags
= 0; /* MBZ */
631 /* to enable echos and oplocks */
632 req
->hdr
.CreditRequest
= cpu_to_le16(3);
634 /* only one of SMB2 signing flags may be set in SMB2 request */
636 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
637 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
638 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
640 req
->SecurityMode
= 0;
642 req
->Capabilities
= 0;
643 req
->Channel
= 0; /* MBZ */
645 iov
[0].iov_base
= (char *)req
;
646 /* 4 for rfc1002 length field and 1 for pad */
647 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
649 if (ses
->sectype
== Kerberos
) {
650 #ifdef CONFIG_CIFS_UPCALL
651 struct cifs_spnego_msg
*msg
;
653 spnego_key
= cifs_get_spnego_key(ses
);
654 if (IS_ERR(spnego_key
)) {
655 rc
= PTR_ERR(spnego_key
);
660 msg
= spnego_key
->payload
.data
[0];
662 * check version field to make sure that cifs.upcall is
663 * sending us a response in an expected form
665 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
667 "bad cifs.upcall version. Expected %d got %d",
668 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
672 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
674 if (!ses
->auth_key
.response
) {
676 "Kerberos can't allocate (%u bytes) memory",
681 ses
->auth_key
.len
= msg
->sesskey_len
;
682 blob_length
= msg
->secblob_len
;
683 iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
684 iov
[1].iov_len
= blob_length
;
688 #endif /* CONFIG_CIFS_UPCALL */
689 } else if (phase
== NtLmNegotiate
) { /* if not krb5 must be ntlmssp */
690 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
692 if (ntlmssp_blob
== NULL
) {
696 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
698 /* blob_length = build_spnego_ntlmssp_blob(
700 sizeof(struct _NEGOTIATE_MESSAGE),
702 /* BB eventually need to add this */
703 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
708 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
709 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
710 security_blob
= ntlmssp_blob
;
712 iov
[1].iov_base
= security_blob
;
713 iov
[1].iov_len
= blob_length
;
714 } else if (phase
== NtLmAuthenticate
) {
715 req
->hdr
.SessionId
= ses
->Suid
;
716 ntlmssp_blob
= kzalloc(sizeof(struct _NEGOTIATE_MESSAGE
) + 500,
718 if (ntlmssp_blob
== NULL
) {
722 rc
= build_ntlmssp_auth_blob(ntlmssp_blob
, &blob_length
, ses
,
725 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n",
727 goto ssetup_exit
; /* BB double check error handling */
730 /* blob_length = build_spnego_ntlmssp_blob(
734 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
739 security_blob
= ntlmssp_blob
;
741 iov
[1].iov_base
= security_blob
;
742 iov
[1].iov_len
= blob_length
;
744 cifs_dbg(VFS
, "illegal ntlmssp phase\n");
749 /* Testing shows that buffer offset must be at location of Buffer[0] */
750 req
->SecurityBufferOffset
=
751 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
752 1 /* pad */ - 4 /* rfc1001 len */);
753 req
->SecurityBufferLength
= cpu_to_le16(blob_length
);
755 inc_rfc1001_len(req
, blob_length
- 1 /* pad */);
757 /* BB add code to build os and lm fields */
759 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
,
760 CIFS_LOG_ERROR
| CIFS_NEG_OP
);
762 kfree(security_blob
);
763 rsp
= (struct smb2_sess_setup_rsp
*)iov
[0].iov_base
;
764 ses
->Suid
= rsp
->hdr
.SessionId
;
765 if (resp_buftype
!= CIFS_NO_BUFFER
&&
766 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
) {
767 if (phase
!= NtLmNegotiate
) {
768 cifs_dbg(VFS
, "Unexpected more processing error\n");
771 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
772 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
773 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
774 le16_to_cpu(rsp
->SecurityBufferOffset
));
779 /* NTLMSSP Negotiate sent now processing challenge (response) */
780 phase
= NtLmChallenge
; /* process ntlmssp challenge */
781 rc
= 0; /* MORE_PROCESSING is not an error here but expected */
782 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
783 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
787 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
788 * but at least the raw NTLMSSP case works.
791 * No tcon so can't do
792 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
797 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
798 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
799 cifs_dbg(VFS
, "SMB3 encryption not supported yet\n");
801 free_rsp_buf(resp_buftype
, rsp
);
803 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
804 if ((phase
== NtLmChallenge
) && (rc
== 0))
805 goto ssetup_ntlmssp_authenticate
;
808 mutex_lock(&server
->srv_mutex
);
809 if (server
->sign
&& server
->ops
->generate_signingkey
) {
810 rc
= server
->ops
->generate_signingkey(ses
);
811 kfree(ses
->auth_key
.response
);
812 ses
->auth_key
.response
= NULL
;
815 "SMB3 session key generation failed\n");
816 mutex_unlock(&server
->srv_mutex
);
820 if (!server
->session_estab
) {
821 server
->sequence_number
= 0x2;
822 server
->session_estab
= true;
824 mutex_unlock(&server
->srv_mutex
);
826 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
827 spin_lock(&GlobalMid_Lock
);
828 ses
->status
= CifsGood
;
829 ses
->need_reconnect
= false;
830 spin_unlock(&GlobalMid_Lock
);
835 kfree(ses
->auth_key
.response
);
836 ses
->auth_key
.response
= NULL
;
839 key_invalidate(spnego_key
);
848 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
850 struct smb2_logoff_req
*req
; /* response is also trivial struct */
852 struct TCP_Server_Info
*server
;
854 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
856 if (ses
&& (ses
->server
))
857 server
= ses
->server
;
861 /* no need to send SMB logoff if uid already closed due to reconnect */
862 if (ses
->need_reconnect
)
863 goto smb2_session_already_dead
;
865 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
869 /* since no tcon, smb2_init can not do this, so do here */
870 req
->hdr
.SessionId
= ses
->Suid
;
872 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
874 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
876 * No tcon so can't do
877 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
880 smb2_session_already_dead
:
884 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
886 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
889 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
891 /* These are similar values to what Windows uses */
892 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
894 tcon
->max_chunks
= 256;
895 tcon
->max_bytes_chunk
= 1048576;
896 tcon
->max_bytes_copy
= 16777216;
900 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
901 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
903 struct smb2_tree_connect_req
*req
;
904 struct smb2_tree_connect_rsp
*rsp
= NULL
;
909 struct TCP_Server_Info
*server
;
910 __le16
*unc_path
= NULL
;
912 cifs_dbg(FYI
, "TCON\n");
914 if ((ses
->server
) && tree
)
915 server
= ses
->server
;
919 if (tcon
&& tcon
->bad_network_name
)
922 if ((tcon
&& tcon
->seal
) &&
923 ((ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
) == 0)) {
924 cifs_dbg(VFS
, "encryption requested but no server support");
928 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
929 if (unc_path
== NULL
)
932 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
934 if (unc_path_len
< 2) {
939 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
946 /* since no tcon, smb2_init can not do this, so do here */
947 req
->hdr
.SessionId
= ses
->Suid
;
948 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
949 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
952 iov
[0].iov_base
= (char *)req
;
953 /* 4 for rfc1002 length field and 1 for pad */
954 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
956 /* Testing shows that buffer offset must be at location of Buffer[0] */
957 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
958 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
959 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
960 iov
[1].iov_base
= unc_path
;
961 iov
[1].iov_len
= unc_path_len
;
963 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
965 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
966 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
970 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
971 tcon
->need_reconnect
= true;
973 goto tcon_error_exit
;
977 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
981 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
982 cifs_dbg(FYI
, "connection to disk share\n");
983 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
985 cifs_dbg(FYI
, "connection to pipe share\n");
986 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
988 cifs_dbg(FYI
, "connection to printer\n");
990 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
992 goto tcon_error_exit
;
995 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
996 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
997 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
998 tcon
->tidStatus
= CifsGood
;
999 tcon
->need_reconnect
= false;
1000 tcon
->tid
= rsp
->hdr
.TreeId
;
1001 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1003 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1004 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1005 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1006 init_copy_chunk_defaults(tcon
);
1007 if (tcon
->share_flags
& SHI1005_FLAGS_ENCRYPT_DATA
)
1008 cifs_dbg(VFS
, "Encrypted shares not supported");
1009 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1010 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1012 free_rsp_buf(resp_buftype
, rsp
);
1017 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1018 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1020 tcon
->bad_network_name
= true;
1026 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1028 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1030 struct TCP_Server_Info
*server
;
1031 struct cifs_ses
*ses
= tcon
->ses
;
1033 cifs_dbg(FYI
, "Tree Disconnect\n");
1035 if (ses
&& (ses
->server
))
1036 server
= ses
->server
;
1040 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1043 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
1047 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
1049 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1055 static struct create_durable
*
1056 create_durable_buf(void)
1058 struct create_durable
*buf
;
1060 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1064 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1065 (struct create_durable
, Data
));
1066 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1067 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1068 (struct create_durable
, Name
));
1069 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1070 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1078 static struct create_durable
*
1079 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1081 struct create_durable
*buf
;
1083 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1087 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1088 (struct create_durable
, Data
));
1089 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1090 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1091 (struct create_durable
, Name
));
1092 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1093 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1094 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1095 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1104 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1105 unsigned int *epoch
)
1108 struct create_context
*cc
;
1109 unsigned int next
= 0;
1112 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
1113 cc
= (struct create_context
*)data_offset
;
1115 cc
= (struct create_context
*)((char *)cc
+ next
);
1116 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1117 if (le16_to_cpu(cc
->NameLength
) != 4 ||
1118 strncmp(name
, "RqLs", 4)) {
1119 next
= le32_to_cpu(cc
->Next
);
1122 return server
->ops
->parse_lease_buf(cc
, epoch
);
1123 } while (next
!= 0);
1129 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1130 unsigned int *num_iovec
, __u8
*oplock
)
1132 struct smb2_create_req
*req
= iov
[0].iov_base
;
1133 unsigned int num
= *num_iovec
;
1135 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1136 if (iov
[num
].iov_base
== NULL
)
1138 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1139 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1140 if (!req
->CreateContextsOffset
)
1141 req
->CreateContextsOffset
= cpu_to_le32(
1142 sizeof(struct smb2_create_req
) - 4 +
1143 iov
[num
- 1].iov_len
);
1144 le32_add_cpu(&req
->CreateContextsLength
,
1145 server
->vals
->create_lease_size
);
1146 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
1147 *num_iovec
= num
+ 1;
1151 static struct create_durable_v2
*
1152 create_durable_v2_buf(struct cifs_fid
*pfid
)
1154 struct create_durable_v2
*buf
;
1156 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1160 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1161 (struct create_durable_v2
, dcontext
));
1162 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1163 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1164 (struct create_durable_v2
, Name
));
1165 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1167 buf
->dcontext
.Timeout
= 0; /* Should this be configurable by workload */
1168 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1169 get_random_bytes(buf
->dcontext
.CreateGuid
, 16);
1170 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1172 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1180 static struct create_durable_handle_reconnect_v2
*
1181 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1183 struct create_durable_handle_reconnect_v2
*buf
;
1185 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1190 buf
->ccontext
.DataOffset
=
1191 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1193 buf
->ccontext
.DataLength
=
1194 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1195 buf
->ccontext
.NameOffset
=
1196 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1198 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1200 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1201 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1202 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1203 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1205 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1214 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1215 struct cifs_open_parms
*oparms
)
1217 struct smb2_create_req
*req
= iov
[0].iov_base
;
1218 unsigned int num
= *num_iovec
;
1220 iov
[num
].iov_base
= create_durable_v2_buf(oparms
->fid
);
1221 if (iov
[num
].iov_base
== NULL
)
1223 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1224 if (!req
->CreateContextsOffset
)
1225 req
->CreateContextsOffset
=
1226 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1228 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1229 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable_v2
));
1230 *num_iovec
= num
+ 1;
1235 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1236 struct cifs_open_parms
*oparms
)
1238 struct smb2_create_req
*req
= iov
[0].iov_base
;
1239 unsigned int num
= *num_iovec
;
1241 /* indicate that we don't need to relock the file */
1242 oparms
->reconnect
= false;
1244 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1245 if (iov
[num
].iov_base
== NULL
)
1247 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1248 if (!req
->CreateContextsOffset
)
1249 req
->CreateContextsOffset
=
1250 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1252 le32_add_cpu(&req
->CreateContextsLength
,
1253 sizeof(struct create_durable_handle_reconnect_v2
));
1254 inc_rfc1001_len(&req
->hdr
,
1255 sizeof(struct create_durable_handle_reconnect_v2
));
1256 *num_iovec
= num
+ 1;
1261 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1262 struct cifs_open_parms
*oparms
, bool use_persistent
)
1264 struct smb2_create_req
*req
= iov
[0].iov_base
;
1265 unsigned int num
= *num_iovec
;
1267 if (use_persistent
) {
1268 if (oparms
->reconnect
)
1269 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1272 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1275 if (oparms
->reconnect
) {
1276 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1277 /* indicate that we don't need to relock the file */
1278 oparms
->reconnect
= false;
1280 iov
[num
].iov_base
= create_durable_buf();
1281 if (iov
[num
].iov_base
== NULL
)
1283 iov
[num
].iov_len
= sizeof(struct create_durable
);
1284 if (!req
->CreateContextsOffset
)
1285 req
->CreateContextsOffset
=
1286 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1288 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1289 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
1290 *num_iovec
= num
+ 1;
1295 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1296 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1297 struct smb2_err_rsp
**err_buf
)
1299 struct smb2_create_req
*req
;
1300 struct smb2_create_rsp
*rsp
;
1301 struct TCP_Server_Info
*server
;
1302 struct cifs_tcon
*tcon
= oparms
->tcon
;
1303 struct cifs_ses
*ses
= tcon
->ses
;
1307 __le16
*copy_path
= NULL
;
1310 unsigned int num_iovecs
= 2;
1311 __u32 file_attributes
= 0;
1312 char *dhc_buf
= NULL
, *lc_buf
= NULL
;
1314 cifs_dbg(FYI
, "create/open\n");
1316 if (ses
&& (ses
->server
))
1317 server
= ses
->server
;
1321 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1325 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1326 file_attributes
|= ATTR_READONLY
;
1327 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
1328 file_attributes
|= ATTR_SYSTEM
;
1330 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1331 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1332 /* File attributes ignored on open (used in create though) */
1333 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1334 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1335 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1336 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1337 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1338 /* do not count rfc1001 len field */
1339 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
1341 iov
[0].iov_base
= (char *)req
;
1342 /* 4 for rfc1002 length field */
1343 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1345 /* MUST set path len (NameLength) to 0 opening root of share */
1346 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1347 /* -1 since last byte is buf[0] which is sent below (path) */
1349 if (uni_path_len
% 8 != 0) {
1350 copy_size
= uni_path_len
/ 8 * 8;
1351 if (copy_size
< uni_path_len
)
1354 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1357 memcpy((char *)copy_path
, (const char *)path
,
1359 uni_path_len
= copy_size
;
1363 iov
[1].iov_len
= uni_path_len
;
1364 iov
[1].iov_base
= path
;
1365 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1366 inc_rfc1001_len(req
, uni_path_len
- 1);
1368 if (!server
->oplocks
)
1369 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1371 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1372 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1373 req
->RequestedOplockLevel
= *oplock
;
1375 rc
= add_lease_context(server
, iov
, &num_iovecs
, oplock
);
1377 cifs_small_buf_release(req
);
1381 lc_buf
= iov
[num_iovecs
-1].iov_base
;
1384 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1385 /* need to set Next field of lease context if we request it */
1386 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
1387 struct create_context
*ccontext
=
1388 (struct create_context
*)iov
[num_iovecs
-1].iov_base
;
1390 cpu_to_le32(server
->vals
->create_lease_size
);
1393 rc
= add_durable_context(iov
, &num_iovecs
, oparms
,
1394 tcon
->use_persistent
);
1396 cifs_small_buf_release(req
);
1401 dhc_buf
= iov
[num_iovecs
-1].iov_base
;
1404 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1405 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
1408 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1410 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1415 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1416 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1419 memcpy(buf
, &rsp
->CreationTime
, 32);
1420 buf
->AllocationSize
= rsp
->AllocationSize
;
1421 buf
->EndOfFile
= rsp
->EndofFile
;
1422 buf
->Attributes
= rsp
->FileAttributes
;
1423 buf
->NumberOfLinks
= cpu_to_le32(1);
1424 buf
->DeletePending
= 0;
1427 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1428 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1430 *oplock
= rsp
->OplockLevel
;
1435 free_rsp_buf(resp_buftype
, rsp
);
1440 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1443 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1444 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, char *in_data
,
1445 u32 indatalen
, char **out_data
, u32
*plen
/* returned data len */)
1447 struct smb2_ioctl_req
*req
;
1448 struct smb2_ioctl_rsp
*rsp
;
1449 struct TCP_Server_Info
*server
;
1450 struct cifs_ses
*ses
;
1456 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1458 if (out_data
!= NULL
)
1461 /* zero out returned data len, in case of error */
1470 if (ses
&& (ses
->server
))
1471 server
= ses
->server
;
1475 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1479 req
->CtlCode
= cpu_to_le32(opcode
);
1480 req
->PersistentFileId
= persistent_fid
;
1481 req
->VolatileFileId
= volatile_fid
;
1484 req
->InputCount
= cpu_to_le32(indatalen
);
1485 /* do not set InputOffset if no input data */
1487 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1488 iov
[1].iov_base
= in_data
;
1489 iov
[1].iov_len
= indatalen
;
1494 req
->OutputOffset
= 0;
1495 req
->OutputCount
= 0; /* MBZ */
1498 * Could increase MaxOutputResponse, but that would require more
1499 * than one credit. Windows typically sets this smaller, but for some
1500 * ioctls it may be useful to allow server to send more. No point
1501 * limiting what the server can send as long as fits in one credit
1503 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1506 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1510 iov
[0].iov_base
= (char *)req
;
1513 * If no input data, the size of ioctl struct in
1514 * protocol spec still includes a 1 byte data buffer,
1515 * but if input data passed to ioctl, we do not
1516 * want to double count this, so we do not send
1517 * the dummy one byte of data in iovec[0] if sending
1518 * input data (in iovec[1]). We also must add 4 bytes
1519 * in first iovec to allow for rfc1002 length field.
1523 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1524 inc_rfc1001_len(req
, indatalen
- 1);
1526 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1529 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1530 rsp
= (struct smb2_ioctl_rsp
*)iov
[0].iov_base
;
1532 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
1533 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1535 } else if (rc
== -EINVAL
) {
1536 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
1537 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
1538 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1543 /* check if caller wants to look at return data or just return rc */
1544 if ((plen
== NULL
) || (out_data
== NULL
))
1547 *plen
= le32_to_cpu(rsp
->OutputCount
);
1549 /* We check for obvious errors in the output buffer length and offset */
1551 goto ioctl_exit
; /* server returned no data */
1552 else if (*plen
> 0xFF00) {
1553 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1559 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1560 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1561 le32_to_cpu(rsp
->OutputOffset
));
1567 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1568 if (*out_data
== NULL
) {
1574 (char *)&rsp
->hdr
.ProtocolId
+ le32_to_cpu(rsp
->OutputOffset
),
1577 free_rsp_buf(resp_buftype
, rsp
);
1582 * Individual callers to ioctl worker function follow
1586 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
1587 u64 persistent_fid
, u64 volatile_fid
)
1590 struct compress_ioctl fsctl_input
;
1591 char *ret_data
= NULL
;
1593 fsctl_input
.CompressionState
=
1594 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
1596 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
1597 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
1598 (char *)&fsctl_input
/* data input */,
1599 2 /* in data len */, &ret_data
/* out data */, NULL
);
1601 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
1607 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1608 u64 persistent_fid
, u64 volatile_fid
)
1610 struct smb2_close_req
*req
;
1611 struct smb2_close_rsp
*rsp
;
1612 struct TCP_Server_Info
*server
;
1613 struct cifs_ses
*ses
= tcon
->ses
;
1618 cifs_dbg(FYI
, "Close\n");
1620 if (ses
&& (ses
->server
))
1621 server
= ses
->server
;
1625 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1629 req
->PersistentFileId
= persistent_fid
;
1630 req
->VolatileFileId
= volatile_fid
;
1632 iov
[0].iov_base
= (char *)req
;
1633 /* 4 for rfc1002 length field */
1634 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1636 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1637 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1640 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1644 /* BB FIXME - decode close response, update inode for caching */
1647 free_rsp_buf(resp_buftype
, rsp
);
1652 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1653 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1656 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1657 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1658 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1659 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1662 if (buffer_length
< min_buf_size
) {
1663 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1664 buffer_length
, min_buf_size
);
1668 /* check if beyond RFC1001 maximum length */
1669 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1670 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1671 buffer_length
, smb_len
);
1675 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1676 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1684 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1685 * Caller must free buffer.
1688 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1689 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1693 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1699 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1703 memcpy(data
, begin_of_buf
, buffer_length
);
1709 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1710 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1711 size_t output_len
, size_t min_len
, void *data
)
1713 struct smb2_query_info_req
*req
;
1714 struct smb2_query_info_rsp
*rsp
= NULL
;
1718 struct TCP_Server_Info
*server
;
1719 struct cifs_ses
*ses
= tcon
->ses
;
1721 cifs_dbg(FYI
, "Query Info\n");
1723 if (ses
&& (ses
->server
))
1724 server
= ses
->server
;
1728 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1732 req
->InfoType
= SMB2_O_INFO_FILE
;
1733 req
->FileInfoClass
= info_class
;
1734 req
->PersistentFileId
= persistent_fid
;
1735 req
->VolatileFileId
= volatile_fid
;
1736 /* 4 for rfc1002 length field and 1 for Buffer */
1737 req
->InputBufferOffset
=
1738 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1739 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1741 iov
[0].iov_base
= (char *)req
;
1742 /* 4 for rfc1002 length field */
1743 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1745 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1746 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1749 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1753 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1754 le32_to_cpu(rsp
->OutputBufferLength
),
1755 &rsp
->hdr
, min_len
, data
);
1758 free_rsp_buf(resp_buftype
, rsp
);
1763 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1764 u64 persistent_fid
, u64 volatile_fid
,
1765 struct smb2_file_all_info
*data
)
1767 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1768 FILE_ALL_INFORMATION
,
1769 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
1770 sizeof(struct smb2_file_all_info
), data
);
1774 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1775 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1777 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1778 FILE_INTERNAL_INFORMATION
,
1779 sizeof(struct smb2_file_internal_info
),
1780 sizeof(struct smb2_file_internal_info
), uniqueid
);
1784 * This is a no-op for now. We're not really interested in the reply, but
1785 * rather in the fact that the server sent one and that server->lstrp
1788 * FIXME: maybe we should consider checking that the reply matches request?
1791 smb2_echo_callback(struct mid_q_entry
*mid
)
1793 struct TCP_Server_Info
*server
= mid
->callback_data
;
1794 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1795 unsigned int credits_received
= 1;
1797 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1798 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1800 mutex_lock(&server
->srv_mutex
);
1801 DeleteMidQEntry(mid
);
1802 mutex_unlock(&server
->srv_mutex
);
1803 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1807 SMB2_echo(struct TCP_Server_Info
*server
)
1809 struct smb2_echo_req
*req
;
1812 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1815 cifs_dbg(FYI
, "In echo request\n");
1817 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
1821 req
->hdr
.CreditRequest
= cpu_to_le16(1);
1823 iov
.iov_base
= (char *)req
;
1824 /* 4 for rfc1002 length field */
1825 iov
.iov_len
= get_rfc1002_length(req
) + 4;
1827 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
1830 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
1832 cifs_small_buf_release(req
);
1837 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1840 struct smb2_flush_req
*req
;
1841 struct TCP_Server_Info
*server
;
1842 struct cifs_ses
*ses
= tcon
->ses
;
1847 cifs_dbg(FYI
, "Flush\n");
1849 if (ses
&& (ses
->server
))
1850 server
= ses
->server
;
1854 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
1858 req
->PersistentFileId
= persistent_fid
;
1859 req
->VolatileFileId
= volatile_fid
;
1861 iov
[0].iov_base
= (char *)req
;
1862 /* 4 for rfc1002 length field */
1863 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1865 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1868 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
1870 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
1875 * To form a chain of read requests, any read requests after the first should
1876 * have the end_of_chain boolean set to true.
1879 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
1880 unsigned int remaining_bytes
, int request_type
)
1883 struct smb2_read_req
*req
= NULL
;
1885 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
1888 if (io_parms
->tcon
->ses
->server
== NULL
)
1889 return -ECONNABORTED
;
1891 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
1893 req
->PersistentFileId
= io_parms
->persistent_fid
;
1894 req
->VolatileFileId
= io_parms
->volatile_fid
;
1895 req
->ReadChannelInfoOffset
= 0; /* reserved */
1896 req
->ReadChannelInfoLength
= 0; /* reserved */
1897 req
->Channel
= 0; /* reserved */
1898 req
->MinimumCount
= 0;
1899 req
->Length
= cpu_to_le32(io_parms
->length
);
1900 req
->Offset
= cpu_to_le64(io_parms
->offset
);
1902 if (request_type
& CHAINED_REQUEST
) {
1903 if (!(request_type
& END_OF_CHAIN
)) {
1904 /* 4 for rfc1002 length field */
1905 req
->hdr
.NextCommand
=
1906 cpu_to_le32(get_rfc1002_length(req
) + 4);
1907 } else /* END_OF_CHAIN */
1908 req
->hdr
.NextCommand
= 0;
1909 if (request_type
& RELATED_REQUEST
) {
1910 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
1912 * Related requests use info from previous read request
1915 req
->hdr
.SessionId
= 0xFFFFFFFF;
1916 req
->hdr
.TreeId
= 0xFFFFFFFF;
1917 req
->PersistentFileId
= 0xFFFFFFFF;
1918 req
->VolatileFileId
= 0xFFFFFFFF;
1921 if (remaining_bytes
> io_parms
->length
)
1922 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
1924 req
->RemainingBytes
= 0;
1926 iov
[0].iov_base
= (char *)req
;
1927 /* 4 for rfc1002 length field */
1928 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1933 smb2_readv_callback(struct mid_q_entry
*mid
)
1935 struct cifs_readdata
*rdata
= mid
->callback_data
;
1936 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
1937 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1938 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
1939 unsigned int credits_received
= 1;
1940 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
1942 .rq_pages
= rdata
->pages
,
1943 .rq_npages
= rdata
->nr_pages
,
1944 .rq_pagesz
= rdata
->pagesz
,
1945 .rq_tailsz
= rdata
->tailsz
};
1947 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1948 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
1951 switch (mid
->mid_state
) {
1952 case MID_RESPONSE_RECEIVED
:
1953 credits_received
= le16_to_cpu(buf
->CreditRequest
);
1954 /* result already set, check signature */
1958 rc
= smb2_verify_signature(&rqst
, server
);
1960 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
1963 /* FIXME: should this be counted toward the initiating task? */
1964 task_io_account_read(rdata
->got_bytes
);
1965 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
1967 case MID_REQUEST_SUBMITTED
:
1968 case MID_RETRY_NEEDED
:
1969 rdata
->result
= -EAGAIN
;
1970 if (server
->sign
&& rdata
->got_bytes
)
1971 /* reset bytes number since we can not check a sign */
1972 rdata
->got_bytes
= 0;
1973 /* FIXME: should this be counted toward the initiating task? */
1974 task_io_account_read(rdata
->got_bytes
);
1975 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
1978 if (rdata
->result
!= -ENODATA
)
1979 rdata
->result
= -EIO
;
1983 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
1985 queue_work(cifsiod_wq
, &rdata
->work
);
1986 mutex_lock(&server
->srv_mutex
);
1987 DeleteMidQEntry(mid
);
1988 mutex_unlock(&server
->srv_mutex
);
1989 add_credits(server
, credits_received
, 0);
1992 /* smb2_async_readv - send an async write, and set up mid to handle result */
1994 smb2_async_readv(struct cifs_readdata
*rdata
)
1997 struct smb2_hdr
*buf
;
1998 struct cifs_io_parms io_parms
;
1999 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
2001 struct TCP_Server_Info
*server
;
2003 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
2004 __func__
, rdata
->offset
, rdata
->bytes
);
2006 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2007 io_parms
.offset
= rdata
->offset
;
2008 io_parms
.length
= rdata
->bytes
;
2009 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
2010 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
2011 io_parms
.pid
= rdata
->pid
;
2013 server
= io_parms
.tcon
->ses
->server
;
2015 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
2017 if (rc
== -EAGAIN
&& rdata
->credits
) {
2018 /* credits was reset by reconnect */
2020 /* reduce in_flight value since we won't send the req */
2021 spin_lock(&server
->req_lock
);
2022 server
->in_flight
--;
2023 spin_unlock(&server
->req_lock
);
2028 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
2029 /* 4 for rfc1002 length field */
2030 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
2032 if (rdata
->credits
) {
2033 buf
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
2034 SMB2_MAX_BUFFER_SIZE
));
2035 spin_lock(&server
->req_lock
);
2036 server
->credits
+= rdata
->credits
-
2037 le16_to_cpu(buf
->CreditCharge
);
2038 spin_unlock(&server
->req_lock
);
2039 wake_up(&server
->request_q
);
2040 flags
= CIFS_HAS_CREDITS
;
2043 kref_get(&rdata
->refcount
);
2044 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
2045 cifs_readv_receive
, smb2_readv_callback
,
2048 kref_put(&rdata
->refcount
, cifs_readdata_release
);
2049 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
2052 cifs_small_buf_release(buf
);
2057 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2058 unsigned int *nbytes
, char **buf
, int *buf_type
)
2060 int resp_buftype
, rc
= -EACCES
;
2061 struct smb2_read_rsp
*rsp
= NULL
;
2065 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
2069 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
2070 &resp_buftype
, CIFS_LOG_ERROR
);
2072 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
2074 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
2075 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
2080 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
2081 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
2083 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2084 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
2085 (*nbytes
> io_parms
->length
)) {
2086 cifs_dbg(FYI
, "bad length %d for count %d\n",
2087 *nbytes
, io_parms
->length
);
2094 memcpy(*buf
, (char *)&rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
2096 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
2097 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
2098 *buf
= iov
[0].iov_base
;
2099 if (resp_buftype
== CIFS_SMALL_BUFFER
)
2100 *buf_type
= CIFS_SMALL_BUFFER
;
2101 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
2102 *buf_type
= CIFS_LARGE_BUFFER
;
2108 * Check the mid_state and signature on received buffer (if any), and queue the
2109 * workqueue completion task.
2112 smb2_writev_callback(struct mid_q_entry
*mid
)
2114 struct cifs_writedata
*wdata
= mid
->callback_data
;
2115 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2116 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2117 unsigned int written
;
2118 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
2119 unsigned int credits_received
= 1;
2121 switch (mid
->mid_state
) {
2122 case MID_RESPONSE_RECEIVED
:
2123 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
2124 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
2125 if (wdata
->result
!= 0)
2128 written
= le32_to_cpu(rsp
->DataLength
);
2130 * Mask off high 16 bits when bytes written as returned
2131 * by the server is greater than bytes requested by the
2132 * client. OS/2 servers are known to set incorrect
2135 if (written
> wdata
->bytes
)
2138 if (written
< wdata
->bytes
)
2139 wdata
->result
= -ENOSPC
;
2141 wdata
->bytes
= written
;
2143 case MID_REQUEST_SUBMITTED
:
2144 case MID_RETRY_NEEDED
:
2145 wdata
->result
= -EAGAIN
;
2148 wdata
->result
= -EIO
;
2153 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2155 queue_work(cifsiod_wq
, &wdata
->work
);
2156 mutex_lock(&server
->srv_mutex
);
2157 DeleteMidQEntry(mid
);
2158 mutex_unlock(&server
->srv_mutex
);
2159 add_credits(tcon
->ses
->server
, credits_received
, 0);
2162 /* smb2_async_writev - send an async write, and set up mid to handle result */
2164 smb2_async_writev(struct cifs_writedata
*wdata
,
2165 void (*release
)(struct kref
*kref
))
2167 int rc
= -EACCES
, flags
= 0;
2168 struct smb2_write_req
*req
= NULL
;
2169 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2170 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2172 struct smb_rqst rqst
;
2174 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
2176 if (rc
== -EAGAIN
&& wdata
->credits
) {
2177 /* credits was reset by reconnect */
2179 /* reduce in_flight value since we won't send the req */
2180 spin_lock(&server
->req_lock
);
2181 server
->in_flight
--;
2182 spin_unlock(&server
->req_lock
);
2184 goto async_writev_out
;
2187 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
2189 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
2190 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
2191 req
->WriteChannelInfoOffset
= 0;
2192 req
->WriteChannelInfoLength
= 0;
2194 req
->Offset
= cpu_to_le64(wdata
->offset
);
2195 /* 4 for rfc1002 length field */
2196 req
->DataOffset
= cpu_to_le16(
2197 offsetof(struct smb2_write_req
, Buffer
) - 4);
2198 req
->RemainingBytes
= 0;
2200 /* 4 for rfc1002 length field and 1 for Buffer */
2201 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
2206 rqst
.rq_pages
= wdata
->pages
;
2207 rqst
.rq_npages
= wdata
->nr_pages
;
2208 rqst
.rq_pagesz
= wdata
->pagesz
;
2209 rqst
.rq_tailsz
= wdata
->tailsz
;
2211 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
2212 wdata
->offset
, wdata
->bytes
);
2214 req
->Length
= cpu_to_le32(wdata
->bytes
);
2216 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
2218 if (wdata
->credits
) {
2219 req
->hdr
.CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
2220 SMB2_MAX_BUFFER_SIZE
));
2221 spin_lock(&server
->req_lock
);
2222 server
->credits
+= wdata
->credits
-
2223 le16_to_cpu(req
->hdr
.CreditCharge
);
2224 spin_unlock(&server
->req_lock
);
2225 wake_up(&server
->request_q
);
2226 flags
= CIFS_HAS_CREDITS
;
2229 kref_get(&wdata
->refcount
);
2230 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, wdata
,
2234 kref_put(&wdata
->refcount
, release
);
2235 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2239 cifs_small_buf_release(req
);
2244 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2245 * The length field from io_parms must be at least 1 and indicates a number of
2246 * elements with data to write that begins with position 1 in iov array. All
2247 * data length is specified by count.
2250 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2251 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
2254 struct smb2_write_req
*req
= NULL
;
2255 struct smb2_write_rsp
*rsp
= NULL
;
2262 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
2266 if (io_parms
->tcon
->ses
->server
== NULL
)
2267 return -ECONNABORTED
;
2269 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
2271 req
->PersistentFileId
= io_parms
->persistent_fid
;
2272 req
->VolatileFileId
= io_parms
->volatile_fid
;
2273 req
->WriteChannelInfoOffset
= 0;
2274 req
->WriteChannelInfoLength
= 0;
2276 req
->Length
= cpu_to_le32(io_parms
->length
);
2277 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2278 /* 4 for rfc1002 length field */
2279 req
->DataOffset
= cpu_to_le16(
2280 offsetof(struct smb2_write_req
, Buffer
) - 4);
2281 req
->RemainingBytes
= 0;
2283 iov
[0].iov_base
= (char *)req
;
2284 /* 4 for rfc1002 length field and 1 for Buffer */
2285 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2287 /* length of entire message including data to be written */
2288 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
2290 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
2292 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
2295 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
2296 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
2298 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2300 free_rsp_buf(resp_buftype
, rsp
);
2305 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
2308 unsigned int entrycount
= 0;
2309 unsigned int next_offset
= 0;
2310 FILE_DIRECTORY_INFO
*entryptr
;
2312 if (bufstart
== NULL
)
2315 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
2318 entryptr
= (FILE_DIRECTORY_INFO
*)
2319 ((char *)entryptr
+ next_offset
);
2321 if ((char *)entryptr
+ size
> end_of_buf
) {
2322 cifs_dbg(VFS
, "malformed search entry would overflow\n");
2326 len
= le32_to_cpu(entryptr
->FileNameLength
);
2327 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
2328 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
2333 *lastentry
= (char *)entryptr
;
2336 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
2348 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
2349 u64 persistent_fid
, u64 volatile_fid
, int index
,
2350 struct cifs_search_info
*srch_inf
)
2352 struct smb2_query_directory_req
*req
;
2353 struct smb2_query_directory_rsp
*rsp
= NULL
;
2357 int resp_buftype
= CIFS_NO_BUFFER
;
2358 unsigned char *bufptr
;
2359 struct TCP_Server_Info
*server
;
2360 struct cifs_ses
*ses
= tcon
->ses
;
2361 __le16 asteriks
= cpu_to_le16('*');
2363 unsigned int output_size
= CIFSMaxBufSize
;
2364 size_t info_buf_size
;
2366 if (ses
&& (ses
->server
))
2367 server
= ses
->server
;
2371 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
2375 switch (srch_inf
->info_level
) {
2376 case SMB_FIND_FILE_DIRECTORY_INFO
:
2377 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
2378 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
2380 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
2381 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
2382 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
2385 cifs_dbg(VFS
, "info level %u isn't supported\n",
2386 srch_inf
->info_level
);
2391 req
->FileIndex
= cpu_to_le32(index
);
2392 req
->PersistentFileId
= persistent_fid
;
2393 req
->VolatileFileId
= volatile_fid
;
2396 bufptr
= req
->Buffer
;
2397 memcpy(bufptr
, &asteriks
, len
);
2399 req
->FileNameOffset
=
2400 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
2401 req
->FileNameLength
= cpu_to_le16(len
);
2403 * BB could be 30 bytes or so longer if we used SMB2 specific
2404 * buffer lengths, but this is safe and close enough.
2406 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
2407 output_size
= min_t(unsigned int, output_size
, 2 << 15);
2408 req
->OutputBufferLength
= cpu_to_le32(output_size
);
2410 iov
[0].iov_base
= (char *)req
;
2411 /* 4 for RFC1001 length and 1 for Buffer */
2412 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2414 iov
[1].iov_base
= (char *)(req
->Buffer
);
2415 iov
[1].iov_len
= len
;
2417 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
2419 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
2420 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
2423 if (rc
== -ENODATA
&& rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
) {
2424 srch_inf
->endOfSearch
= true;
2427 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
2431 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2432 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2437 srch_inf
->unicode
= true;
2439 if (srch_inf
->ntwrk_buf_start
) {
2440 if (srch_inf
->smallBuf
)
2441 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
2443 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
2445 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
2446 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
2447 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
2448 /* 4 for rfc1002 length field */
2449 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
2450 srch_inf
->entries_in_buffer
=
2451 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
2452 &srch_inf
->last_entry
, info_buf_size
);
2453 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
2454 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
2455 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
2456 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
2457 if (resp_buftype
== CIFS_LARGE_BUFFER
)
2458 srch_inf
->smallBuf
= false;
2459 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
2460 srch_inf
->smallBuf
= true;
2462 cifs_dbg(VFS
, "illegal search buffer type\n");
2467 free_rsp_buf(resp_buftype
, rsp
);
2472 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2473 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
2474 unsigned int num
, void **data
, unsigned int *size
)
2476 struct smb2_set_info_req
*req
;
2477 struct smb2_set_info_rsp
*rsp
= NULL
;
2482 struct TCP_Server_Info
*server
;
2483 struct cifs_ses
*ses
= tcon
->ses
;
2485 if (ses
&& (ses
->server
))
2486 server
= ses
->server
;
2493 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
2497 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
2503 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2505 req
->InfoType
= SMB2_O_INFO_FILE
;
2506 req
->FileInfoClass
= info_class
;
2507 req
->PersistentFileId
= persistent_fid
;
2508 req
->VolatileFileId
= volatile_fid
;
2510 /* 4 for RFC1001 length and 1 for Buffer */
2512 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
2513 req
->BufferLength
= cpu_to_le32(*size
);
2515 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
2517 memcpy(req
->Buffer
, *data
, *size
);
2519 iov
[0].iov_base
= (char *)req
;
2520 /* 4 for RFC1001 length */
2521 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2523 for (i
= 1; i
< num
; i
++) {
2524 inc_rfc1001_len(req
, size
[i
]);
2525 le32_add_cpu(&req
->BufferLength
, size
[i
]);
2526 iov
[i
].iov_base
= (char *)data
[i
];
2527 iov
[i
].iov_len
= size
[i
];
2530 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
2531 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
2534 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
2536 free_rsp_buf(resp_buftype
, rsp
);
2542 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
2543 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2545 struct smb2_file_rename_info info
;
2547 unsigned int size
[2];
2549 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2551 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2555 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
2556 /* 0 = fail if target already exists */
2557 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2558 info
.FileNameLength
= cpu_to_le32(len
);
2561 size
[0] = sizeof(struct smb2_file_rename_info
);
2563 data
[1] = target_file
;
2564 size
[1] = len
+ 2 /* null */;
2566 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2567 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2574 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2575 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2577 struct smb2_file_link_info info
;
2579 unsigned int size
[2];
2581 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2583 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2587 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2588 /* 0 = fail if link already exists */
2589 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2590 info
.FileNameLength
= cpu_to_le32(len
);
2593 size
[0] = sizeof(struct smb2_file_link_info
);
2595 data
[1] = target_file
;
2596 size
[1] = len
+ 2 /* null */;
2598 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2599 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2605 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2606 u64 volatile_fid
, u32 pid
, __le64
*eof
, bool is_falloc
)
2608 struct smb2_file_eof_info info
;
2612 info
.EndOfFile
= *eof
;
2615 size
= sizeof(struct smb2_file_eof_info
);
2618 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2619 pid
, FILE_ALLOCATION_INFORMATION
, 1, &data
, &size
);
2621 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2622 pid
, FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2626 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2627 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2630 size
= sizeof(FILE_BASIC_INFO
);
2631 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2632 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2633 (void **)&buf
, &size
);
2637 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2638 const u64 persistent_fid
, const u64 volatile_fid
,
2642 struct smb2_oplock_break
*req
= NULL
;
2644 cifs_dbg(FYI
, "SMB2_oplock_break\n");
2645 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2650 req
->VolatileFid
= volatile_fid
;
2651 req
->PersistentFid
= persistent_fid
;
2652 req
->OplockLevel
= oplock_level
;
2653 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2655 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2656 /* SMB2 buffer freed by function above */
2659 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2660 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
2667 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2668 struct kstatfs
*kst
)
2670 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2671 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2672 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2673 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2674 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2679 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2680 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2683 struct smb2_query_info_req
*req
;
2685 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2687 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2690 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2694 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2695 req
->FileInfoClass
= level
;
2696 req
->PersistentFileId
= persistent_fid
;
2697 req
->VolatileFileId
= volatile_fid
;
2698 /* 4 for rfc1002 length field and 1 for pad */
2699 req
->InputBufferOffset
=
2700 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2701 req
->OutputBufferLength
= cpu_to_le32(
2702 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2704 iov
->iov_base
= (char *)req
;
2705 /* 4 for rfc1002 length field */
2706 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2711 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2712 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2714 struct smb2_query_info_rsp
*rsp
= NULL
;
2718 struct cifs_ses
*ses
= tcon
->ses
;
2719 struct smb2_fs_full_size_info
*info
= NULL
;
2721 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2722 sizeof(struct smb2_fs_full_size_info
),
2723 persistent_fid
, volatile_fid
);
2727 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2729 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2732 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2734 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2735 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2736 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2737 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2738 sizeof(struct smb2_fs_full_size_info
));
2740 copy_fs_info_to_kstatfs(info
, fsdata
);
2743 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2748 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
2749 u64 persistent_fid
, u64 volatile_fid
, int level
)
2751 struct smb2_query_info_rsp
*rsp
= NULL
;
2754 int resp_buftype
, max_len
, min_len
;
2755 struct cifs_ses
*ses
= tcon
->ses
;
2756 unsigned int rsp_len
, offset
;
2758 if (level
== FS_DEVICE_INFORMATION
) {
2759 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
2760 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
2761 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
2762 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
2763 min_len
= MIN_FS_ATTR_INFO_SIZE
;
2764 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
2765 max_len
= sizeof(struct smb3_fs_ss_info
);
2766 min_len
= sizeof(struct smb3_fs_ss_info
);
2768 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
2772 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
2773 persistent_fid
, volatile_fid
);
2777 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2779 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2782 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2784 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
2785 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
2786 rc
= validate_buf(offset
, rsp_len
, &rsp
->hdr
, min_len
);
2790 if (level
== FS_ATTRIBUTE_INFORMATION
)
2791 memcpy(&tcon
->fsAttrInfo
, 4 /* RFC1001 len */ + offset
2792 + (char *)&rsp
->hdr
, min_t(unsigned int,
2794 else if (level
== FS_DEVICE_INFORMATION
)
2795 memcpy(&tcon
->fsDevInfo
, 4 /* RFC1001 len */ + offset
2796 + (char *)&rsp
->hdr
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
2797 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
2798 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
2799 (4 /* RFC1001 len */ + offset
+ (char *)&rsp
->hdr
);
2800 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
2801 tcon
->perf_sector_size
=
2802 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
2806 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2811 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
2812 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2813 const __u32 num_lock
, struct smb2_lock_element
*buf
)
2816 struct smb2_lock_req
*req
= NULL
;
2821 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
2823 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
2827 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2828 req
->LockCount
= cpu_to_le16(num_lock
);
2830 req
->PersistentFileId
= persist_fid
;
2831 req
->VolatileFileId
= volatile_fid
;
2833 count
= num_lock
* sizeof(struct smb2_lock_element
);
2834 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
2836 iov
[0].iov_base
= (char *)req
;
2837 /* 4 for rfc1002 length field and count for all locks */
2838 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
2839 iov
[1].iov_base
= (char *)buf
;
2840 iov
[1].iov_len
= count
;
2842 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
2843 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
2845 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
2846 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
2853 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
2854 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
2855 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
2858 struct smb2_lock_element lock
;
2860 lock
.Offset
= cpu_to_le64(offset
);
2861 lock
.Length
= cpu_to_le64(length
);
2862 lock
.Flags
= cpu_to_le32(lock_flags
);
2863 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
2864 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
2866 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
2870 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2871 __u8
*lease_key
, const __le32 lease_state
)
2874 struct smb2_lease_ack
*req
= NULL
;
2876 cifs_dbg(FYI
, "SMB2_lease_break\n");
2877 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2882 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2883 req
->StructureSize
= cpu_to_le16(36);
2884 inc_rfc1001_len(req
, 12);
2886 memcpy(req
->LeaseKey
, lease_key
, 16);
2887 req
->LeaseState
= lease_state
;
2889 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2890 /* SMB2 buffer freed by function above */
2893 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2894 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);