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 if (tcon
&& tcon
->ses
&& tcon
->ses
->server
) {
104 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
106 spin_lock(&server
->req_lock
);
107 /* Request up to 2 credits but don't go over the limit. */
108 if (server
->credits
>= server
->max_credits
)
109 hdr
->CreditRequest
= cpu_to_le16(0);
111 hdr
->CreditRequest
= cpu_to_le16(
112 min_t(int, server
->max_credits
-
113 server
->credits
, 2));
114 spin_unlock(&server
->req_lock
);
116 hdr
->CreditRequest
= cpu_to_le16(2);
118 hdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
123 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
124 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
125 if ((tcon
->ses
) && (tcon
->ses
->server
) &&
126 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
127 hdr
->CreditCharge
= cpu_to_le16(1);
128 /* else CreditCharge MBZ */
130 hdr
->TreeId
= tcon
->tid
;
131 /* Uid is not converted */
133 hdr
->SessionId
= tcon
->ses
->Suid
;
136 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
137 * to pass the path on the Open SMB prefixed by \\server\share.
138 * Not sure when we would need to do the augmented path (if ever) and
139 * setting this flag breaks the SMB2 open operation since it is
140 * illegal to send an empty path name (without \\server\share prefix)
141 * when the DFS flag is set in the SMB open header. We could
142 * consider setting the flag on all operations other than open
143 * but it is safer to net set it for now.
145 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
146 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
148 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
)
149 hdr
->Flags
|= SMB2_FLAGS_SIGNED
;
151 pdu
->StructureSize2
= cpu_to_le16(parmsize
);
156 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
159 struct nls_table
*nls_codepage
;
160 struct cifs_ses
*ses
;
161 struct TCP_Server_Info
*server
;
164 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
165 * check for tcp and smb session status done differently
166 * for those three - in the calling routine.
171 if (smb2_command
== SMB2_TREE_CONNECT
)
174 if (tcon
->tidStatus
== CifsExiting
) {
176 * only tree disconnect, open, and write,
177 * (and ulogoff which does not have tcon)
178 * are allowed as we start force umount.
180 if ((smb2_command
!= SMB2_WRITE
) &&
181 (smb2_command
!= SMB2_CREATE
) &&
182 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
183 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
188 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
189 (!tcon
->ses
->server
))
193 server
= ses
->server
;
196 * Give demultiplex thread up to 10 seconds to reconnect, should be
197 * greater than cifs socket timeout which is 7 seconds
199 while (server
->tcpStatus
== CifsNeedReconnect
) {
201 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
202 * here since they are implicitly done when session drops.
204 switch (smb2_command
) {
206 * BB Should we keep oplock break and add flush to exceptions?
208 case SMB2_TREE_DISCONNECT
:
211 case SMB2_OPLOCK_BREAK
:
215 wait_event_interruptible_timeout(server
->response_q
,
216 (server
->tcpStatus
!= CifsNeedReconnect
), 10 * HZ
);
218 /* are we still trying to reconnect? */
219 if (server
->tcpStatus
!= CifsNeedReconnect
)
223 * on "soft" mounts we wait once. Hard mounts keep
224 * retrying until process is killed or server comes
228 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
233 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
236 nls_codepage
= load_nls_default();
239 * need to prevent multiple threads trying to simultaneously reconnect
240 * the same SMB session
242 mutex_lock(&tcon
->ses
->session_mutex
);
243 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
244 if (!rc
&& tcon
->ses
->need_reconnect
)
245 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
247 if (rc
|| !tcon
->need_reconnect
) {
248 mutex_unlock(&tcon
->ses
->session_mutex
);
252 cifs_mark_open_files_invalid(tcon
);
254 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
255 mutex_unlock(&tcon
->ses
->session_mutex
);
257 if (tcon
->use_persistent
)
258 cifs_reopen_persistent_handles(tcon
);
260 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
263 atomic_inc(&tconInfoReconnectCount
);
266 * Check if handle based operation so we know whether we can continue
267 * or not without returning to caller to reset file handle.
270 * BB Is flush done by server on drop of tcp session? Should we special
271 * case it and skip above?
273 switch (smb2_command
) {
279 case SMB2_QUERY_DIRECTORY
:
280 case SMB2_CHANGE_NOTIFY
:
281 case SMB2_QUERY_INFO
:
285 unload_nls(nls_codepage
);
290 * Allocate and return pointer to an SMB request hdr, and set basic
291 * SMB information in the SMB header. If the return code is zero, this
292 * function must have filled in request_buf pointer.
295 small_smb2_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
300 rc
= smb2_reconnect(smb2_command
, tcon
);
304 /* BB eventually switch this to SMB2 specific small buf size */
305 *request_buf
= cifs_small_buf_get();
306 if (*request_buf
== NULL
) {
307 /* BB should we add a retry in here if not a writepage? */
311 smb2_hdr_assemble((struct smb2_hdr
*) *request_buf
, smb2_command
, tcon
);
314 #ifdef CONFIG_CIFS_STATS2
315 uint16_t com_code
= le16_to_cpu(smb2_command
);
316 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
318 cifs_stats_inc(&tcon
->num_smbs_sent
);
324 #ifdef CONFIG_CIFS_SMB311
325 /* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
326 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
329 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
330 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
333 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
335 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
336 pneg_ctxt
->DataLength
= cpu_to_le16(38);
337 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
338 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
339 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
340 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
344 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
346 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
347 pneg_ctxt
->DataLength
= cpu_to_le16(6);
348 pneg_ctxt
->CipherCount
= cpu_to_le16(2);
349 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_GCM
;
350 pneg_ctxt
->Ciphers
[1] = SMB2_ENCRYPTION_AES128_CCM
;
354 assemble_neg_contexts(struct smb2_negotiate_req
*req
)
357 /* +4 is to account for the RFC1001 len field */
358 char *pneg_ctxt
= (char *)req
+ OFFSET_OF_NEG_CONTEXT
+ 4;
360 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
361 /* Add 2 to size to round to 8 byte boundary */
362 pneg_ctxt
+= 2 + sizeof(struct smb2_preauth_neg_context
);
363 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
364 req
->NegotiateContextOffset
= cpu_to_le32(OFFSET_OF_NEG_CONTEXT
);
365 req
->NegotiateContextCount
= cpu_to_le16(2);
366 inc_rfc1001_len(req
, 4 + sizeof(struct smb2_preauth_neg_context
) + 2
367 + sizeof(struct smb2_encryption_neg_context
)); /* calculate hash */
370 static void assemble_neg_contexts(struct smb2_negotiate_req
*req
)
379 * SMB2 Worker functions follow:
381 * The general structure of the worker functions is:
382 * 1) Call smb2_init (assembles SMB2 header)
383 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
384 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
385 * 4) Decode SMB2 command specific fields in the fixed length area
386 * 5) Decode variable length data area (if any for this SMB2 command type)
387 * 6) Call free smb buffer
393 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
395 struct smb2_negotiate_req
*req
;
396 struct smb2_negotiate_rsp
*rsp
;
400 struct TCP_Server_Info
*server
= ses
->server
;
401 int blob_offset
, blob_length
;
403 int flags
= CIFS_NEG_OP
;
405 cifs_dbg(FYI
, "Negotiate protocol\n");
408 WARN(1, "%s: server is NULL!\n", __func__
);
412 rc
= small_smb2_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
);
416 req
->hdr
.SessionId
= 0;
418 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
420 req
->DialectCount
= cpu_to_le16(1); /* One vers= at a time for now */
421 inc_rfc1001_len(req
, 2);
423 /* only one of SMB2 signing flags may be set in SMB2 request */
425 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
426 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
427 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
429 req
->SecurityMode
= 0;
431 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
433 /* ClientGUID must be zero for SMB2.02 dialect */
434 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
435 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
437 memcpy(req
->ClientGUID
, server
->client_guid
,
438 SMB2_CLIENT_GUID_SIZE
);
439 if (ses
->server
->vals
->protocol_id
== SMB311_PROT_ID
)
440 assemble_neg_contexts(req
);
442 iov
[0].iov_base
= (char *)req
;
443 /* 4 for rfc1002 length field */
444 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
446 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, flags
);
448 rsp
= (struct smb2_negotiate_rsp
*)iov
[0].iov_base
;
450 * No tcon so can't do
451 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
456 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
458 /* BB we may eventually want to match the negotiated vs. requested
459 dialect, even though we are only requesting one at a time */
460 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
461 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
462 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
463 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
464 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
465 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
466 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
467 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
468 #ifdef CONFIG_CIFS_SMB311
469 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
470 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
473 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
474 le16_to_cpu(rsp
->DialectRevision
));
478 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
480 /* SMB2 only has an extended negflavor */
481 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
482 /* set it to the maximum buffer size value we can send with 1 credit */
483 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
484 SMB2_MAX_BUFFER_SIZE
);
485 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
486 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
487 /* BB Do we need to validate the SecurityMode? */
488 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
489 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
491 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
493 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
496 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
498 * ses->sectype = RawNTLMSSP;
499 * but for time being this is our only auth choice so doesn't matter.
500 * We just found a server which sets blob length to zero expecting raw.
502 if (blob_length
== 0)
503 cifs_dbg(FYI
, "missing security blob on negprot\n");
505 rc
= cifs_enable_signing(server
, ses
->sign
);
509 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
516 free_rsp_buf(resp_buftype
, rsp
);
520 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
523 struct validate_negotiate_info_req vneg_inbuf
;
524 struct validate_negotiate_info_rsp
*pneg_rsp
;
527 cifs_dbg(FYI
, "validate negotiate\n");
530 * validation ioctl must be signed, so no point sending this if we
531 * can not sign it. We could eventually change this to selectively
532 * sign just this, the first and only signed request on a connection.
533 * This is good enough for now since a user who wants better security
534 * would also enable signing on the mount. Having validation of
535 * negotiate info for signed connections helps reduce attack vectors
537 if (tcon
->ses
->server
->sign
== false)
538 return 0; /* validation requires signing */
540 vneg_inbuf
.Capabilities
=
541 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
542 memcpy(vneg_inbuf
.Guid
, tcon
->ses
->server
->client_guid
,
543 SMB2_CLIENT_GUID_SIZE
);
546 vneg_inbuf
.SecurityMode
=
547 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
548 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
549 vneg_inbuf
.SecurityMode
=
550 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
552 vneg_inbuf
.SecurityMode
= 0;
554 vneg_inbuf
.DialectCount
= cpu_to_le16(1);
555 vneg_inbuf
.Dialects
[0] =
556 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
558 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
559 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
560 (char *)&vneg_inbuf
, sizeof(struct validate_negotiate_info_req
),
561 (char **)&pneg_rsp
, &rsplen
);
564 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
568 if (rsplen
!= sizeof(struct validate_negotiate_info_rsp
)) {
569 cifs_dbg(VFS
, "invalid size of protocol negotiate response\n");
573 /* check validate negotiate info response matches what we got earlier */
574 if (pneg_rsp
->Dialect
!=
575 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
))
578 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
581 /* do not validate server guid because not saved at negprot time yet */
583 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
584 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
587 /* validate negotiate successful */
588 cifs_dbg(FYI
, "validate negotiate info successful\n");
592 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
596 struct SMB2_sess_data
{
598 struct cifs_ses
*ses
;
599 struct nls_table
*nls_cp
;
600 void (*func
)(struct SMB2_sess_data
*);
602 u64 previous_session
;
604 /* we will send the SMB in three pieces:
605 * a fixed length beginning part, an optional
606 * SPNEGO blob (which can be zero length), and a
607 * last part which will include the strings
608 * and rest of bcc area. This allows us to avoid
609 * a large buffer 17K allocation
616 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
619 struct cifs_ses
*ses
= sess_data
->ses
;
620 struct smb2_sess_setup_req
*req
;
621 struct TCP_Server_Info
*server
= ses
->server
;
623 rc
= small_smb2_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
);
627 req
->hdr
.SessionId
= 0; /* First session, not a reauthenticate */
629 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
630 req
->PreviousSessionId
= sess_data
->previous_session
;
632 req
->Flags
= 0; /* MBZ */
633 /* to enable echos and oplocks */
634 req
->hdr
.CreditRequest
= cpu_to_le16(3);
636 /* only one of SMB2 signing flags may be set in SMB2 request */
638 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
639 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
640 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
642 req
->SecurityMode
= 0;
644 req
->Capabilities
= 0;
645 req
->Channel
= 0; /* MBZ */
647 sess_data
->iov
[0].iov_base
= (char *)req
;
648 /* 4 for rfc1002 length field and 1 for pad */
649 sess_data
->iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
651 * This variable will be used to clear the buffer
652 * allocated above in case of any error in the calling function.
654 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
660 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
662 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
663 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
667 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
670 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
672 /* Testing shows that buffer offset must be at location of Buffer[0] */
673 req
->SecurityBufferOffset
=
674 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) -
675 1 /* pad */ - 4 /* rfc1001 len */);
676 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
678 inc_rfc1001_len(req
, sess_data
->iov
[1].iov_len
- 1 /* pad */);
680 /* BB add code to build os and lm fields */
682 rc
= SendReceive2(sess_data
->xid
, sess_data
->ses
,
684 &sess_data
->buf0_type
,
685 CIFS_LOG_ERROR
| CIFS_NEG_OP
);
691 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
694 struct cifs_ses
*ses
= sess_data
->ses
;
696 mutex_lock(&ses
->server
->srv_mutex
);
697 if (ses
->server
->sign
&& ses
->server
->ops
->generate_signingkey
) {
698 rc
= ses
->server
->ops
->generate_signingkey(ses
);
699 kfree(ses
->auth_key
.response
);
700 ses
->auth_key
.response
= NULL
;
703 "SMB3 session key generation failed\n");
704 mutex_unlock(&ses
->server
->srv_mutex
);
708 if (!ses
->server
->session_estab
) {
709 ses
->server
->sequence_number
= 0x2;
710 ses
->server
->session_estab
= true;
712 mutex_unlock(&ses
->server
->srv_mutex
);
714 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
715 spin_lock(&GlobalMid_Lock
);
716 ses
->status
= CifsGood
;
717 ses
->need_reconnect
= false;
718 spin_unlock(&GlobalMid_Lock
);
721 if (!ses
->server
->sign
) {
722 kfree(ses
->auth_key
.response
);
723 ses
->auth_key
.response
= NULL
;
728 #ifdef CONFIG_CIFS_UPCALL
730 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
733 struct cifs_ses
*ses
= sess_data
->ses
;
734 struct cifs_spnego_msg
*msg
;
735 struct key
*spnego_key
= NULL
;
736 struct smb2_sess_setup_rsp
*rsp
= NULL
;
738 rc
= SMB2_sess_alloc_buffer(sess_data
);
742 spnego_key
= cifs_get_spnego_key(ses
);
743 if (IS_ERR(spnego_key
)) {
744 rc
= PTR_ERR(spnego_key
);
749 msg
= spnego_key
->payload
.data
[0];
751 * check version field to make sure that cifs.upcall is
752 * sending us a response in an expected form
754 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
756 "bad cifs.upcall version. Expected %d got %d",
757 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
759 goto out_put_spnego_key
;
762 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
764 if (!ses
->auth_key
.response
) {
766 "Kerberos can't allocate (%u bytes) memory",
769 goto out_put_spnego_key
;
771 ses
->auth_key
.len
= msg
->sesskey_len
;
773 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
774 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
776 rc
= SMB2_sess_sendreceive(sess_data
);
778 goto out_put_spnego_key
;
780 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
781 ses
->Suid
= rsp
->hdr
.SessionId
;
783 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
784 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
785 cifs_dbg(VFS
, "SMB3 encryption not supported yet\n");
787 rc
= SMB2_sess_establish_session(sess_data
);
789 key_invalidate(spnego_key
);
792 sess_data
->result
= rc
;
793 sess_data
->func
= NULL
;
794 SMB2_sess_free_buffer(sess_data
);
798 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
800 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
801 sess_data
->result
= -EOPNOTSUPP
;
802 sess_data
->func
= NULL
;
807 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
810 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
813 struct cifs_ses
*ses
= sess_data
->ses
;
814 struct smb2_sess_setup_rsp
*rsp
= NULL
;
815 char *ntlmssp_blob
= NULL
;
816 bool use_spnego
= false; /* else use raw ntlmssp */
820 * If memory allocation is successful, caller of this function
823 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
828 ses
->ntlmssp
->sesskey_per_smbsess
= true;
830 rc
= SMB2_sess_alloc_buffer(sess_data
);
834 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
836 if (ntlmssp_blob
== NULL
) {
841 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
843 /* BB eventually need to add this */
844 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
848 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
849 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
851 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
852 sess_data
->iov
[1].iov_len
= blob_length
;
854 rc
= SMB2_sess_sendreceive(sess_data
);
855 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
857 /* If true, rc here is expected and not an error */
858 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
859 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
865 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) - 4 !=
866 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
867 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
868 le16_to_cpu(rsp
->SecurityBufferOffset
));
872 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
873 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
877 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
880 ses
->Suid
= rsp
->hdr
.SessionId
;
881 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
882 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
883 cifs_dbg(VFS
, "SMB3 encryption not supported yet\n");
887 SMB2_sess_free_buffer(sess_data
);
889 sess_data
->result
= 0;
890 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
896 sess_data
->result
= rc
;
897 sess_data
->func
= NULL
;
901 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
904 struct cifs_ses
*ses
= sess_data
->ses
;
905 struct smb2_sess_setup_req
*req
;
906 struct smb2_sess_setup_rsp
*rsp
= NULL
;
907 unsigned char *ntlmssp_blob
= NULL
;
908 bool use_spnego
= false; /* else use raw ntlmssp */
911 rc
= SMB2_sess_alloc_buffer(sess_data
);
915 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
916 req
->hdr
.SessionId
= ses
->Suid
;
918 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
, ses
,
921 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
926 /* BB eventually need to add this */
927 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
931 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
932 sess_data
->iov
[1].iov_len
= blob_length
;
934 rc
= SMB2_sess_sendreceive(sess_data
);
938 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
940 ses
->Suid
= rsp
->hdr
.SessionId
;
941 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
942 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
943 cifs_dbg(VFS
, "SMB3 encryption not supported yet\n");
945 rc
= SMB2_sess_establish_session(sess_data
);
948 SMB2_sess_free_buffer(sess_data
);
951 sess_data
->result
= rc
;
952 sess_data
->func
= NULL
;
956 SMB2_select_sec(struct cifs_ses
*ses
, struct SMB2_sess_data
*sess_data
)
958 if (ses
->sectype
!= Kerberos
&& ses
->sectype
!= RawNTLMSSP
)
959 ses
->sectype
= RawNTLMSSP
;
961 switch (ses
->sectype
) {
963 sess_data
->func
= SMB2_auth_kerberos
;
966 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
969 cifs_dbg(VFS
, "secType %d not supported!\n", ses
->sectype
);
977 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
978 const struct nls_table
*nls_cp
)
981 struct TCP_Server_Info
*server
= ses
->server
;
982 struct SMB2_sess_data
*sess_data
;
984 cifs_dbg(FYI
, "Session Setup\n");
987 WARN(1, "%s: server is NULL!\n", __func__
);
991 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
995 rc
= SMB2_select_sec(ses
, sess_data
);
998 sess_data
->xid
= xid
;
999 sess_data
->ses
= ses
;
1000 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1001 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1003 while (sess_data
->func
)
1004 sess_data
->func(sess_data
);
1006 rc
= sess_data
->result
;
1013 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1015 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1017 struct TCP_Server_Info
*server
;
1019 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1021 if (ses
&& (ses
->server
))
1022 server
= ses
->server
;
1026 /* no need to send SMB logoff if uid already closed due to reconnect */
1027 if (ses
->need_reconnect
)
1028 goto smb2_session_already_dead
;
1030 rc
= small_smb2_init(SMB2_LOGOFF
, NULL
, (void **) &req
);
1034 /* since no tcon, smb2_init can not do this, so do here */
1035 req
->hdr
.SessionId
= ses
->Suid
;
1037 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1039 rc
= SendReceiveNoRsp(xid
, ses
, (char *) &req
->hdr
, 0);
1041 * No tcon so can't do
1042 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1045 smb2_session_already_dead
:
1049 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1051 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1054 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1056 /* These are similar values to what Windows uses */
1057 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1059 tcon
->max_chunks
= 256;
1060 tcon
->max_bytes_chunk
= 1048576;
1061 tcon
->max_bytes_copy
= 16777216;
1065 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1066 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1068 struct smb2_tree_connect_req
*req
;
1069 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1074 struct TCP_Server_Info
*server
;
1075 __le16
*unc_path
= NULL
;
1077 cifs_dbg(FYI
, "TCON\n");
1079 if ((ses
->server
) && tree
)
1080 server
= ses
->server
;
1084 if (tcon
&& tcon
->bad_network_name
)
1087 if ((tcon
&& tcon
->seal
) &&
1088 ((ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
) == 0)) {
1089 cifs_dbg(VFS
, "encryption requested but no server support");
1093 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1094 if (unc_path
== NULL
)
1097 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1099 if (unc_path_len
< 2) {
1104 rc
= small_smb2_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
);
1111 /* since no tcon, smb2_init can not do this, so do here */
1112 req
->hdr
.SessionId
= ses
->Suid
;
1113 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
1114 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
1117 iov
[0].iov_base
= (char *)req
;
1118 /* 4 for rfc1002 length field and 1 for pad */
1119 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1121 /* Testing shows that buffer offset must be at location of Buffer[0] */
1122 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1123 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1124 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1125 iov
[1].iov_base
= unc_path
;
1126 iov
[1].iov_len
= unc_path_len
;
1128 inc_rfc1001_len(req
, unc_path_len
- 1 /* pad */);
1130 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
1131 rsp
= (struct smb2_tree_connect_rsp
*)iov
[0].iov_base
;
1135 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1136 tcon
->need_reconnect
= true;
1138 goto tcon_error_exit
;
1142 ses
->ipc_tid
= rsp
->hdr
.TreeId
;
1146 if (rsp
->ShareType
& SMB2_SHARE_TYPE_DISK
)
1147 cifs_dbg(FYI
, "connection to disk share\n");
1148 else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PIPE
) {
1150 cifs_dbg(FYI
, "connection to pipe share\n");
1151 } else if (rsp
->ShareType
& SMB2_SHARE_TYPE_PRINT
) {
1153 cifs_dbg(FYI
, "connection to printer\n");
1155 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1157 goto tcon_error_exit
;
1160 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1161 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1162 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1163 tcon
->tidStatus
= CifsGood
;
1164 tcon
->need_reconnect
= false;
1165 tcon
->tid
= rsp
->hdr
.TreeId
;
1166 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1168 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1169 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1170 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1171 init_copy_chunk_defaults(tcon
);
1172 if (tcon
->share_flags
& SHI1005_FLAGS_ENCRYPT_DATA
)
1173 cifs_dbg(VFS
, "Encrypted shares not supported");
1174 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1175 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1177 free_rsp_buf(resp_buftype
, rsp
);
1182 if (rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1183 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1185 tcon
->bad_network_name
= true;
1191 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1193 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1195 struct TCP_Server_Info
*server
;
1196 struct cifs_ses
*ses
= tcon
->ses
;
1198 cifs_dbg(FYI
, "Tree Disconnect\n");
1200 if (ses
&& (ses
->server
))
1201 server
= ses
->server
;
1205 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1208 rc
= small_smb2_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
);
1212 rc
= SendReceiveNoRsp(xid
, ses
, (char *)&req
->hdr
, 0);
1214 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1220 static struct create_durable
*
1221 create_durable_buf(void)
1223 struct create_durable
*buf
;
1225 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1229 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1230 (struct create_durable
, Data
));
1231 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1232 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1233 (struct create_durable
, Name
));
1234 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1235 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1243 static struct create_durable
*
1244 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1246 struct create_durable
*buf
;
1248 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1252 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1253 (struct create_durable
, Data
));
1254 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1255 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1256 (struct create_durable
, Name
));
1257 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1258 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1259 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1260 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1269 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1270 unsigned int *epoch
)
1273 struct create_context
*cc
;
1275 unsigned int remaining
;
1278 data_offset
= (char *)rsp
+ 4 + le32_to_cpu(rsp
->CreateContextsOffset
);
1279 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
1280 cc
= (struct create_context
*)data_offset
;
1281 while (remaining
>= sizeof(struct create_context
)) {
1282 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1283 if (le16_to_cpu(cc
->NameLength
) == 4 &&
1284 strncmp(name
, "RqLs", 4) == 0)
1285 return server
->ops
->parse_lease_buf(cc
, epoch
);
1287 next
= le32_to_cpu(cc
->Next
);
1291 cc
= (struct create_context
*)((char *)cc
+ next
);
1298 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1299 unsigned int *num_iovec
, __u8
*oplock
)
1301 struct smb2_create_req
*req
= iov
[0].iov_base
;
1302 unsigned int num
= *num_iovec
;
1304 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1305 if (iov
[num
].iov_base
== NULL
)
1307 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1308 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1309 if (!req
->CreateContextsOffset
)
1310 req
->CreateContextsOffset
= cpu_to_le32(
1311 sizeof(struct smb2_create_req
) - 4 +
1312 iov
[num
- 1].iov_len
);
1313 le32_add_cpu(&req
->CreateContextsLength
,
1314 server
->vals
->create_lease_size
);
1315 inc_rfc1001_len(&req
->hdr
, server
->vals
->create_lease_size
);
1316 *num_iovec
= num
+ 1;
1320 static struct create_durable_v2
*
1321 create_durable_v2_buf(struct cifs_fid
*pfid
)
1323 struct create_durable_v2
*buf
;
1325 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1329 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1330 (struct create_durable_v2
, dcontext
));
1331 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1332 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1333 (struct create_durable_v2
, Name
));
1334 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1336 buf
->dcontext
.Timeout
= 0; /* Should this be configurable by workload */
1337 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1338 generate_random_uuid(buf
->dcontext
.CreateGuid
);
1339 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1341 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1349 static struct create_durable_handle_reconnect_v2
*
1350 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1352 struct create_durable_handle_reconnect_v2
*buf
;
1354 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1359 buf
->ccontext
.DataOffset
=
1360 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1362 buf
->ccontext
.DataLength
=
1363 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1364 buf
->ccontext
.NameOffset
=
1365 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1367 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1369 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1370 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1371 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1372 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1374 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1383 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1384 struct cifs_open_parms
*oparms
)
1386 struct smb2_create_req
*req
= iov
[0].iov_base
;
1387 unsigned int num
= *num_iovec
;
1389 iov
[num
].iov_base
= create_durable_v2_buf(oparms
->fid
);
1390 if (iov
[num
].iov_base
== NULL
)
1392 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1393 if (!req
->CreateContextsOffset
)
1394 req
->CreateContextsOffset
=
1395 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1397 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1398 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable_v2
));
1399 *num_iovec
= num
+ 1;
1404 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1405 struct cifs_open_parms
*oparms
)
1407 struct smb2_create_req
*req
= iov
[0].iov_base
;
1408 unsigned int num
= *num_iovec
;
1410 /* indicate that we don't need to relock the file */
1411 oparms
->reconnect
= false;
1413 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1414 if (iov
[num
].iov_base
== NULL
)
1416 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1417 if (!req
->CreateContextsOffset
)
1418 req
->CreateContextsOffset
=
1419 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1421 le32_add_cpu(&req
->CreateContextsLength
,
1422 sizeof(struct create_durable_handle_reconnect_v2
));
1423 inc_rfc1001_len(&req
->hdr
,
1424 sizeof(struct create_durable_handle_reconnect_v2
));
1425 *num_iovec
= num
+ 1;
1430 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1431 struct cifs_open_parms
*oparms
, bool use_persistent
)
1433 struct smb2_create_req
*req
= iov
[0].iov_base
;
1434 unsigned int num
= *num_iovec
;
1436 if (use_persistent
) {
1437 if (oparms
->reconnect
)
1438 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1441 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1444 if (oparms
->reconnect
) {
1445 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1446 /* indicate that we don't need to relock the file */
1447 oparms
->reconnect
= false;
1449 iov
[num
].iov_base
= create_durable_buf();
1450 if (iov
[num
].iov_base
== NULL
)
1452 iov
[num
].iov_len
= sizeof(struct create_durable
);
1453 if (!req
->CreateContextsOffset
)
1454 req
->CreateContextsOffset
=
1455 cpu_to_le32(sizeof(struct smb2_create_req
) - 4 +
1457 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1458 inc_rfc1001_len(&req
->hdr
, sizeof(struct create_durable
));
1459 *num_iovec
= num
+ 1;
1464 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1465 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1466 struct smb2_err_rsp
**err_buf
)
1468 struct smb2_create_req
*req
;
1469 struct smb2_create_rsp
*rsp
;
1470 struct TCP_Server_Info
*server
;
1471 struct cifs_tcon
*tcon
= oparms
->tcon
;
1472 struct cifs_ses
*ses
= tcon
->ses
;
1476 __le16
*copy_path
= NULL
;
1479 unsigned int num_iovecs
= 2;
1480 __u32 file_attributes
= 0;
1481 char *dhc_buf
= NULL
, *lc_buf
= NULL
;
1483 cifs_dbg(FYI
, "create/open\n");
1485 if (ses
&& (ses
->server
))
1486 server
= ses
->server
;
1490 rc
= small_smb2_init(SMB2_CREATE
, tcon
, (void **) &req
);
1494 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1495 file_attributes
|= ATTR_READONLY
;
1496 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
1497 file_attributes
|= ATTR_SYSTEM
;
1499 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1500 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1501 /* File attributes ignored on open (used in create though) */
1502 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1503 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1504 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1505 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1506 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1507 /* do not count rfc1001 len field */
1508 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
) - 4);
1510 iov
[0].iov_base
= (char *)req
;
1511 /* 4 for rfc1002 length field */
1512 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1514 /* MUST set path len (NameLength) to 0 opening root of share */
1515 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1516 /* -1 since last byte is buf[0] which is sent below (path) */
1518 if (uni_path_len
% 8 != 0) {
1519 copy_size
= uni_path_len
/ 8 * 8;
1520 if (copy_size
< uni_path_len
)
1523 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1526 memcpy((char *)copy_path
, (const char *)path
,
1528 uni_path_len
= copy_size
;
1532 iov
[1].iov_len
= uni_path_len
;
1533 iov
[1].iov_base
= path
;
1534 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1535 inc_rfc1001_len(req
, uni_path_len
- 1);
1537 if (!server
->oplocks
)
1538 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1540 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1541 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1542 req
->RequestedOplockLevel
= *oplock
;
1544 rc
= add_lease_context(server
, iov
, &num_iovecs
, oplock
);
1546 cifs_small_buf_release(req
);
1550 lc_buf
= iov
[num_iovecs
-1].iov_base
;
1553 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1554 /* need to set Next field of lease context if we request it */
1555 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
1556 struct create_context
*ccontext
=
1557 (struct create_context
*)iov
[num_iovecs
-1].iov_base
;
1559 cpu_to_le32(server
->vals
->create_lease_size
);
1562 rc
= add_durable_context(iov
, &num_iovecs
, oparms
,
1563 tcon
->use_persistent
);
1565 cifs_small_buf_release(req
);
1570 dhc_buf
= iov
[num_iovecs
-1].iov_base
;
1573 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1574 rsp
= (struct smb2_create_rsp
*)iov
[0].iov_base
;
1577 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
1579 *err_buf
= kmemdup(rsp
, get_rfc1002_length(rsp
) + 4,
1584 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
1585 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
1588 memcpy(buf
, &rsp
->CreationTime
, 32);
1589 buf
->AllocationSize
= rsp
->AllocationSize
;
1590 buf
->EndOfFile
= rsp
->EndofFile
;
1591 buf
->Attributes
= rsp
->FileAttributes
;
1592 buf
->NumberOfLinks
= cpu_to_le32(1);
1593 buf
->DeletePending
= 0;
1596 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
1597 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
);
1599 *oplock
= rsp
->OplockLevel
;
1604 free_rsp_buf(resp_buftype
, rsp
);
1609 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1612 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
1613 u64 volatile_fid
, u32 opcode
, bool is_fsctl
, char *in_data
,
1614 u32 indatalen
, char **out_data
, u32
*plen
/* returned data len */)
1616 struct smb2_ioctl_req
*req
;
1617 struct smb2_ioctl_rsp
*rsp
;
1618 struct TCP_Server_Info
*server
;
1619 struct cifs_ses
*ses
;
1625 cifs_dbg(FYI
, "SMB2 IOCTL\n");
1627 if (out_data
!= NULL
)
1630 /* zero out returned data len, in case of error */
1639 if (ses
&& (ses
->server
))
1640 server
= ses
->server
;
1644 rc
= small_smb2_init(SMB2_IOCTL
, tcon
, (void **) &req
);
1648 req
->CtlCode
= cpu_to_le32(opcode
);
1649 req
->PersistentFileId
= persistent_fid
;
1650 req
->VolatileFileId
= volatile_fid
;
1653 req
->InputCount
= cpu_to_le32(indatalen
);
1654 /* do not set InputOffset if no input data */
1656 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
) - 4);
1657 iov
[1].iov_base
= in_data
;
1658 iov
[1].iov_len
= indatalen
;
1663 req
->OutputOffset
= 0;
1664 req
->OutputCount
= 0; /* MBZ */
1667 * Could increase MaxOutputResponse, but that would require more
1668 * than one credit. Windows typically sets this smaller, but for some
1669 * ioctls it may be useful to allow server to send more. No point
1670 * limiting what the server can send as long as fits in one credit
1672 req
->MaxOutputResponse
= cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1675 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
1679 iov
[0].iov_base
= (char *)req
;
1682 * If no input data, the size of ioctl struct in
1683 * protocol spec still includes a 1 byte data buffer,
1684 * but if input data passed to ioctl, we do not
1685 * want to double count this, so we do not send
1686 * the dummy one byte of data in iovec[0] if sending
1687 * input data (in iovec[1]). We also must add 4 bytes
1688 * in first iovec to allow for rfc1002 length field.
1692 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
1693 inc_rfc1001_len(req
, indatalen
- 1);
1695 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1698 rc
= SendReceive2(xid
, ses
, iov
, num_iovecs
, &resp_buftype
, 0);
1699 rsp
= (struct smb2_ioctl_rsp
*)iov
[0].iov_base
;
1701 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
1702 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1704 } else if (rc
== -EINVAL
) {
1705 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
1706 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
1707 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
1712 /* check if caller wants to look at return data or just return rc */
1713 if ((plen
== NULL
) || (out_data
== NULL
))
1716 *plen
= le32_to_cpu(rsp
->OutputCount
);
1718 /* We check for obvious errors in the output buffer length and offset */
1720 goto ioctl_exit
; /* server returned no data */
1721 else if (*plen
> 0xFF00) {
1722 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
1728 if (get_rfc1002_length(rsp
) < le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
1729 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
1730 le32_to_cpu(rsp
->OutputOffset
));
1736 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
1737 if (*out_data
== NULL
) {
1743 (char *)&rsp
->hdr
.ProtocolId
+ le32_to_cpu(rsp
->OutputOffset
),
1746 free_rsp_buf(resp_buftype
, rsp
);
1751 * Individual callers to ioctl worker function follow
1755 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
1756 u64 persistent_fid
, u64 volatile_fid
)
1759 struct compress_ioctl fsctl_input
;
1760 char *ret_data
= NULL
;
1762 fsctl_input
.CompressionState
=
1763 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
1765 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
1766 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
1767 (char *)&fsctl_input
/* data input */,
1768 2 /* in data len */, &ret_data
/* out data */, NULL
);
1770 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
1776 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
1777 u64 persistent_fid
, u64 volatile_fid
)
1779 struct smb2_close_req
*req
;
1780 struct smb2_close_rsp
*rsp
;
1781 struct TCP_Server_Info
*server
;
1782 struct cifs_ses
*ses
= tcon
->ses
;
1787 cifs_dbg(FYI
, "Close\n");
1789 if (ses
&& (ses
->server
))
1790 server
= ses
->server
;
1794 rc
= small_smb2_init(SMB2_CLOSE
, tcon
, (void **) &req
);
1798 req
->PersistentFileId
= persistent_fid
;
1799 req
->VolatileFileId
= volatile_fid
;
1801 iov
[0].iov_base
= (char *)req
;
1802 /* 4 for rfc1002 length field */
1803 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1805 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1806 rsp
= (struct smb2_close_rsp
*)iov
[0].iov_base
;
1809 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
1813 /* BB FIXME - decode close response, update inode for caching */
1816 free_rsp_buf(resp_buftype
, rsp
);
1821 validate_buf(unsigned int offset
, unsigned int buffer_length
,
1822 struct smb2_hdr
*hdr
, unsigned int min_buf_size
)
1825 unsigned int smb_len
= be32_to_cpu(hdr
->smb2_buf_length
);
1826 char *end_of_smb
= smb_len
+ 4 /* RFC1001 length field */ + (char *)hdr
;
1827 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1828 char *end_of_buf
= begin_of_buf
+ buffer_length
;
1831 if (buffer_length
< min_buf_size
) {
1832 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
1833 buffer_length
, min_buf_size
);
1837 /* check if beyond RFC1001 maximum length */
1838 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
1839 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
1840 buffer_length
, smb_len
);
1844 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
1845 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
1853 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1854 * Caller must free buffer.
1857 validate_and_copy_buf(unsigned int offset
, unsigned int buffer_length
,
1858 struct smb2_hdr
*hdr
, unsigned int minbufsize
,
1862 char *begin_of_buf
= 4 /* RFC1001 len field */ + offset
+ (char *)hdr
;
1868 rc
= validate_buf(offset
, buffer_length
, hdr
, minbufsize
);
1872 memcpy(data
, begin_of_buf
, buffer_length
);
1878 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1879 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
,
1880 size_t output_len
, size_t min_len
, void *data
)
1882 struct smb2_query_info_req
*req
;
1883 struct smb2_query_info_rsp
*rsp
= NULL
;
1887 struct TCP_Server_Info
*server
;
1888 struct cifs_ses
*ses
= tcon
->ses
;
1890 cifs_dbg(FYI
, "Query Info\n");
1892 if (ses
&& (ses
->server
))
1893 server
= ses
->server
;
1897 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
1901 req
->InfoType
= SMB2_O_INFO_FILE
;
1902 req
->FileInfoClass
= info_class
;
1903 req
->PersistentFileId
= persistent_fid
;
1904 req
->VolatileFileId
= volatile_fid
;
1905 /* 4 for rfc1002 length field and 1 for Buffer */
1906 req
->InputBufferOffset
=
1907 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
1908 req
->OutputBufferLength
= cpu_to_le32(output_len
);
1910 iov
[0].iov_base
= (char *)req
;
1911 /* 4 for rfc1002 length field */
1912 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
1914 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
1915 rsp
= (struct smb2_query_info_rsp
*)iov
[0].iov_base
;
1918 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
1922 rc
= validate_and_copy_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
1923 le32_to_cpu(rsp
->OutputBufferLength
),
1924 &rsp
->hdr
, min_len
, data
);
1927 free_rsp_buf(resp_buftype
, rsp
);
1932 SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
1933 u64 persistent_fid
, u64 volatile_fid
,
1934 struct smb2_file_all_info
*data
)
1936 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1937 FILE_ALL_INFORMATION
,
1938 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
1939 sizeof(struct smb2_file_all_info
), data
);
1943 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
1944 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
1946 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
1947 FILE_INTERNAL_INFORMATION
,
1948 sizeof(struct smb2_file_internal_info
),
1949 sizeof(struct smb2_file_internal_info
), uniqueid
);
1953 * This is a no-op for now. We're not really interested in the reply, but
1954 * rather in the fact that the server sent one and that server->lstrp
1957 * FIXME: maybe we should consider checking that the reply matches request?
1960 smb2_echo_callback(struct mid_q_entry
*mid
)
1962 struct TCP_Server_Info
*server
= mid
->callback_data
;
1963 struct smb2_echo_rsp
*smb2
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
1964 unsigned int credits_received
= 1;
1966 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
1967 credits_received
= le16_to_cpu(smb2
->hdr
.CreditRequest
);
1969 mutex_lock(&server
->srv_mutex
);
1970 DeleteMidQEntry(mid
);
1971 mutex_unlock(&server
->srv_mutex
);
1972 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
1976 SMB2_echo(struct TCP_Server_Info
*server
)
1978 struct smb2_echo_req
*req
;
1981 struct smb_rqst rqst
= { .rq_iov
= &iov
,
1984 cifs_dbg(FYI
, "In echo request\n");
1986 if (server
->tcpStatus
== CifsNeedNegotiate
) {
1987 struct list_head
*tmp
, *tmp2
;
1988 struct cifs_ses
*ses
;
1989 struct cifs_tcon
*tcon
;
1991 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
1992 spin_lock(&cifs_tcp_ses_lock
);
1993 list_for_each(tmp
, &server
->smb_ses_list
) {
1994 ses
= list_entry(tmp
, struct cifs_ses
, smb_ses_list
);
1995 list_for_each(tmp2
, &ses
->tcon_list
) {
1996 tcon
= list_entry(tmp2
, struct cifs_tcon
,
1998 /* add check for persistent handle reconnect */
1999 if (tcon
&& tcon
->need_reconnect
) {
2000 spin_unlock(&cifs_tcp_ses_lock
);
2001 rc
= smb2_reconnect(SMB2_ECHO
, tcon
);
2002 spin_lock(&cifs_tcp_ses_lock
);
2006 spin_unlock(&cifs_tcp_ses_lock
);
2009 /* if no session, renegotiate failed above */
2010 if (server
->tcpStatus
== CifsNeedNegotiate
)
2013 rc
= small_smb2_init(SMB2_ECHO
, NULL
, (void **)&req
);
2017 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2019 iov
.iov_base
= (char *)req
;
2020 /* 4 for rfc1002 length field */
2021 iov
.iov_len
= get_rfc1002_length(req
) + 4;
2023 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, server
,
2026 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
2028 cifs_small_buf_release(req
);
2033 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2036 struct smb2_flush_req
*req
;
2037 struct TCP_Server_Info
*server
;
2038 struct cifs_ses
*ses
= tcon
->ses
;
2043 cifs_dbg(FYI
, "Flush\n");
2045 if (ses
&& (ses
->server
))
2046 server
= ses
->server
;
2050 rc
= small_smb2_init(SMB2_FLUSH
, tcon
, (void **) &req
);
2054 req
->PersistentFileId
= persistent_fid
;
2055 req
->VolatileFileId
= volatile_fid
;
2057 iov
[0].iov_base
= (char *)req
;
2058 /* 4 for rfc1002 length field */
2059 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2061 rc
= SendReceive2(xid
, ses
, iov
, 1, &resp_buftype
, 0);
2064 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
2066 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
2071 * To form a chain of read requests, any read requests after the first should
2072 * have the end_of_chain boolean set to true.
2075 smb2_new_read_req(struct kvec
*iov
, struct cifs_io_parms
*io_parms
,
2076 unsigned int remaining_bytes
, int request_type
)
2079 struct smb2_read_req
*req
= NULL
;
2081 rc
= small_smb2_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
);
2084 if (io_parms
->tcon
->ses
->server
== NULL
)
2085 return -ECONNABORTED
;
2087 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
2089 req
->PersistentFileId
= io_parms
->persistent_fid
;
2090 req
->VolatileFileId
= io_parms
->volatile_fid
;
2091 req
->ReadChannelInfoOffset
= 0; /* reserved */
2092 req
->ReadChannelInfoLength
= 0; /* reserved */
2093 req
->Channel
= 0; /* reserved */
2094 req
->MinimumCount
= 0;
2095 req
->Length
= cpu_to_le32(io_parms
->length
);
2096 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2098 if (request_type
& CHAINED_REQUEST
) {
2099 if (!(request_type
& END_OF_CHAIN
)) {
2100 /* 4 for rfc1002 length field */
2101 req
->hdr
.NextCommand
=
2102 cpu_to_le32(get_rfc1002_length(req
) + 4);
2103 } else /* END_OF_CHAIN */
2104 req
->hdr
.NextCommand
= 0;
2105 if (request_type
& RELATED_REQUEST
) {
2106 req
->hdr
.Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
2108 * Related requests use info from previous read request
2111 req
->hdr
.SessionId
= 0xFFFFFFFF;
2112 req
->hdr
.TreeId
= 0xFFFFFFFF;
2113 req
->PersistentFileId
= 0xFFFFFFFF;
2114 req
->VolatileFileId
= 0xFFFFFFFF;
2117 if (remaining_bytes
> io_parms
->length
)
2118 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
2120 req
->RemainingBytes
= 0;
2122 iov
[0].iov_base
= (char *)req
;
2123 /* 4 for rfc1002 length field */
2124 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2129 smb2_readv_callback(struct mid_q_entry
*mid
)
2131 struct cifs_readdata
*rdata
= mid
->callback_data
;
2132 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2133 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2134 struct smb2_hdr
*buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
2135 unsigned int credits_received
= 1;
2136 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
2138 .rq_pages
= rdata
->pages
,
2139 .rq_npages
= rdata
->nr_pages
,
2140 .rq_pagesz
= rdata
->pagesz
,
2141 .rq_tailsz
= rdata
->tailsz
};
2143 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2144 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
2147 switch (mid
->mid_state
) {
2148 case MID_RESPONSE_RECEIVED
:
2149 credits_received
= le16_to_cpu(buf
->CreditRequest
);
2150 /* result already set, check signature */
2154 rc
= smb2_verify_signature(&rqst
, server
);
2156 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
2159 /* FIXME: should this be counted toward the initiating task? */
2160 task_io_account_read(rdata
->got_bytes
);
2161 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2163 case MID_REQUEST_SUBMITTED
:
2164 case MID_RETRY_NEEDED
:
2165 rdata
->result
= -EAGAIN
;
2166 if (server
->sign
&& rdata
->got_bytes
)
2167 /* reset bytes number since we can not check a sign */
2168 rdata
->got_bytes
= 0;
2169 /* FIXME: should this be counted toward the initiating task? */
2170 task_io_account_read(rdata
->got_bytes
);
2171 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2174 if (rdata
->result
!= -ENODATA
)
2175 rdata
->result
= -EIO
;
2179 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
2181 queue_work(cifsiod_wq
, &rdata
->work
);
2182 mutex_lock(&server
->srv_mutex
);
2183 DeleteMidQEntry(mid
);
2184 mutex_unlock(&server
->srv_mutex
);
2185 add_credits(server
, credits_received
, 0);
2188 /* smb2_async_readv - send an async write, and set up mid to handle result */
2190 smb2_async_readv(struct cifs_readdata
*rdata
)
2193 struct smb2_hdr
*buf
;
2194 struct cifs_io_parms io_parms
;
2195 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
,
2197 struct TCP_Server_Info
*server
;
2199 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
2200 __func__
, rdata
->offset
, rdata
->bytes
);
2202 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2203 io_parms
.offset
= rdata
->offset
;
2204 io_parms
.length
= rdata
->bytes
;
2205 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
2206 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
2207 io_parms
.pid
= rdata
->pid
;
2209 server
= io_parms
.tcon
->ses
->server
;
2211 rc
= smb2_new_read_req(&rdata
->iov
, &io_parms
, 0, 0);
2213 if (rc
== -EAGAIN
&& rdata
->credits
) {
2214 /* credits was reset by reconnect */
2216 /* reduce in_flight value since we won't send the req */
2217 spin_lock(&server
->req_lock
);
2218 server
->in_flight
--;
2219 spin_unlock(&server
->req_lock
);
2224 buf
= (struct smb2_hdr
*)rdata
->iov
.iov_base
;
2225 /* 4 for rfc1002 length field */
2226 rdata
->iov
.iov_len
= get_rfc1002_length(rdata
->iov
.iov_base
) + 4;
2228 if (rdata
->credits
) {
2229 buf
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
2230 SMB2_MAX_BUFFER_SIZE
));
2231 buf
->CreditRequest
= buf
->CreditCharge
;
2232 spin_lock(&server
->req_lock
);
2233 server
->credits
+= rdata
->credits
-
2234 le16_to_cpu(buf
->CreditCharge
);
2235 spin_unlock(&server
->req_lock
);
2236 wake_up(&server
->request_q
);
2237 flags
= CIFS_HAS_CREDITS
;
2240 kref_get(&rdata
->refcount
);
2241 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
2242 cifs_readv_receive
, smb2_readv_callback
,
2245 kref_put(&rdata
->refcount
, cifs_readdata_release
);
2246 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
2249 cifs_small_buf_release(buf
);
2254 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2255 unsigned int *nbytes
, char **buf
, int *buf_type
)
2257 int resp_buftype
, rc
= -EACCES
;
2258 struct smb2_read_rsp
*rsp
= NULL
;
2262 rc
= smb2_new_read_req(iov
, io_parms
, 0, 0);
2266 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, 1,
2267 &resp_buftype
, CIFS_LOG_ERROR
);
2269 rsp
= (struct smb2_read_rsp
*)iov
[0].iov_base
;
2271 if (rsp
->hdr
.Status
== STATUS_END_OF_FILE
) {
2272 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
2277 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
2278 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
2280 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2281 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
2282 (*nbytes
> io_parms
->length
)) {
2283 cifs_dbg(FYI
, "bad length %d for count %d\n",
2284 *nbytes
, io_parms
->length
);
2291 memcpy(*buf
, (char *)&rsp
->hdr
.ProtocolId
+ rsp
->DataOffset
,
2293 free_rsp_buf(resp_buftype
, iov
[0].iov_base
);
2294 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
2295 *buf
= iov
[0].iov_base
;
2296 if (resp_buftype
== CIFS_SMALL_BUFFER
)
2297 *buf_type
= CIFS_SMALL_BUFFER
;
2298 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
2299 *buf_type
= CIFS_LARGE_BUFFER
;
2305 * Check the mid_state and signature on received buffer (if any), and queue the
2306 * workqueue completion task.
2309 smb2_writev_callback(struct mid_q_entry
*mid
)
2311 struct cifs_writedata
*wdata
= mid
->callback_data
;
2312 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2313 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2314 unsigned int written
;
2315 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
2316 unsigned int credits_received
= 1;
2318 switch (mid
->mid_state
) {
2319 case MID_RESPONSE_RECEIVED
:
2320 credits_received
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
2321 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
2322 if (wdata
->result
!= 0)
2325 written
= le32_to_cpu(rsp
->DataLength
);
2327 * Mask off high 16 bits when bytes written as returned
2328 * by the server is greater than bytes requested by the
2329 * client. OS/2 servers are known to set incorrect
2332 if (written
> wdata
->bytes
)
2335 if (written
< wdata
->bytes
)
2336 wdata
->result
= -ENOSPC
;
2338 wdata
->bytes
= written
;
2340 case MID_REQUEST_SUBMITTED
:
2341 case MID_RETRY_NEEDED
:
2342 wdata
->result
= -EAGAIN
;
2345 wdata
->result
= -EIO
;
2350 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2352 queue_work(cifsiod_wq
, &wdata
->work
);
2353 mutex_lock(&server
->srv_mutex
);
2354 DeleteMidQEntry(mid
);
2355 mutex_unlock(&server
->srv_mutex
);
2356 add_credits(tcon
->ses
->server
, credits_received
, 0);
2359 /* smb2_async_writev - send an async write, and set up mid to handle result */
2361 smb2_async_writev(struct cifs_writedata
*wdata
,
2362 void (*release
)(struct kref
*kref
))
2364 int rc
= -EACCES
, flags
= 0;
2365 struct smb2_write_req
*req
= NULL
;
2366 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
2367 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2369 struct smb_rqst rqst
;
2371 rc
= small_smb2_init(SMB2_WRITE
, tcon
, (void **) &req
);
2373 if (rc
== -EAGAIN
&& wdata
->credits
) {
2374 /* credits was reset by reconnect */
2376 /* reduce in_flight value since we won't send the req */
2377 spin_lock(&server
->req_lock
);
2378 server
->in_flight
--;
2379 spin_unlock(&server
->req_lock
);
2381 goto async_writev_out
;
2384 req
->hdr
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
2386 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
2387 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
2388 req
->WriteChannelInfoOffset
= 0;
2389 req
->WriteChannelInfoLength
= 0;
2391 req
->Offset
= cpu_to_le64(wdata
->offset
);
2392 /* 4 for rfc1002 length field */
2393 req
->DataOffset
= cpu_to_le16(
2394 offsetof(struct smb2_write_req
, Buffer
) - 4);
2395 req
->RemainingBytes
= 0;
2397 /* 4 for rfc1002 length field and 1 for Buffer */
2398 iov
.iov_len
= get_rfc1002_length(req
) + 4 - 1;
2403 rqst
.rq_pages
= wdata
->pages
;
2404 rqst
.rq_npages
= wdata
->nr_pages
;
2405 rqst
.rq_pagesz
= wdata
->pagesz
;
2406 rqst
.rq_tailsz
= wdata
->tailsz
;
2408 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
2409 wdata
->offset
, wdata
->bytes
);
2411 req
->Length
= cpu_to_le32(wdata
->bytes
);
2413 inc_rfc1001_len(&req
->hdr
, wdata
->bytes
- 1 /* Buffer */);
2415 if (wdata
->credits
) {
2416 req
->hdr
.CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
2417 SMB2_MAX_BUFFER_SIZE
));
2418 req
->hdr
.CreditRequest
= req
->hdr
.CreditCharge
;
2419 spin_lock(&server
->req_lock
);
2420 server
->credits
+= wdata
->credits
-
2421 le16_to_cpu(req
->hdr
.CreditCharge
);
2422 spin_unlock(&server
->req_lock
);
2423 wake_up(&server
->request_q
);
2424 flags
= CIFS_HAS_CREDITS
;
2427 kref_get(&wdata
->refcount
);
2428 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, wdata
,
2432 kref_put(&wdata
->refcount
, release
);
2433 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
2437 cifs_small_buf_release(req
);
2442 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2443 * The length field from io_parms must be at least 1 and indicates a number of
2444 * elements with data to write that begins with position 1 in iov array. All
2445 * data length is specified by count.
2448 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2449 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
2452 struct smb2_write_req
*req
= NULL
;
2453 struct smb2_write_rsp
*rsp
= NULL
;
2460 rc
= small_smb2_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
);
2464 if (io_parms
->tcon
->ses
->server
== NULL
)
2465 return -ECONNABORTED
;
2467 req
->hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
2469 req
->PersistentFileId
= io_parms
->persistent_fid
;
2470 req
->VolatileFileId
= io_parms
->volatile_fid
;
2471 req
->WriteChannelInfoOffset
= 0;
2472 req
->WriteChannelInfoLength
= 0;
2474 req
->Length
= cpu_to_le32(io_parms
->length
);
2475 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2476 /* 4 for rfc1002 length field */
2477 req
->DataOffset
= cpu_to_le16(
2478 offsetof(struct smb2_write_req
, Buffer
) - 4);
2479 req
->RemainingBytes
= 0;
2481 iov
[0].iov_base
= (char *)req
;
2482 /* 4 for rfc1002 length field and 1 for Buffer */
2483 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2485 /* length of entire message including data to be written */
2486 inc_rfc1001_len(req
, io_parms
->length
- 1 /* Buffer */);
2488 rc
= SendReceive2(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
2490 rsp
= (struct smb2_write_rsp
*)iov
[0].iov_base
;
2493 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
2494 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
2496 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2498 free_rsp_buf(resp_buftype
, rsp
);
2503 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
2506 unsigned int entrycount
= 0;
2507 unsigned int next_offset
= 0;
2508 FILE_DIRECTORY_INFO
*entryptr
;
2510 if (bufstart
== NULL
)
2513 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
2516 entryptr
= (FILE_DIRECTORY_INFO
*)
2517 ((char *)entryptr
+ next_offset
);
2519 if ((char *)entryptr
+ size
> end_of_buf
) {
2520 cifs_dbg(VFS
, "malformed search entry would overflow\n");
2524 len
= le32_to_cpu(entryptr
->FileNameLength
);
2525 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
2526 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
2531 *lastentry
= (char *)entryptr
;
2534 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
2546 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
2547 u64 persistent_fid
, u64 volatile_fid
, int index
,
2548 struct cifs_search_info
*srch_inf
)
2550 struct smb2_query_directory_req
*req
;
2551 struct smb2_query_directory_rsp
*rsp
= NULL
;
2555 int resp_buftype
= CIFS_NO_BUFFER
;
2556 unsigned char *bufptr
;
2557 struct TCP_Server_Info
*server
;
2558 struct cifs_ses
*ses
= tcon
->ses
;
2559 __le16 asteriks
= cpu_to_le16('*');
2561 unsigned int output_size
= CIFSMaxBufSize
;
2562 size_t info_buf_size
;
2564 if (ses
&& (ses
->server
))
2565 server
= ses
->server
;
2569 rc
= small_smb2_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
);
2573 switch (srch_inf
->info_level
) {
2574 case SMB_FIND_FILE_DIRECTORY_INFO
:
2575 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
2576 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
2578 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
2579 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
2580 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
2583 cifs_dbg(VFS
, "info level %u isn't supported\n",
2584 srch_inf
->info_level
);
2589 req
->FileIndex
= cpu_to_le32(index
);
2590 req
->PersistentFileId
= persistent_fid
;
2591 req
->VolatileFileId
= volatile_fid
;
2594 bufptr
= req
->Buffer
;
2595 memcpy(bufptr
, &asteriks
, len
);
2597 req
->FileNameOffset
=
2598 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1 - 4);
2599 req
->FileNameLength
= cpu_to_le16(len
);
2601 * BB could be 30 bytes or so longer if we used SMB2 specific
2602 * buffer lengths, but this is safe and close enough.
2604 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
2605 output_size
= min_t(unsigned int, output_size
, 2 << 15);
2606 req
->OutputBufferLength
= cpu_to_le32(output_size
);
2608 iov
[0].iov_base
= (char *)req
;
2609 /* 4 for RFC1001 length and 1 for Buffer */
2610 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - 1;
2612 iov
[1].iov_base
= (char *)(req
->Buffer
);
2613 iov
[1].iov_len
= len
;
2615 inc_rfc1001_len(req
, len
- 1 /* Buffer */);
2617 rc
= SendReceive2(xid
, ses
, iov
, 2, &resp_buftype
, 0);
2618 rsp
= (struct smb2_query_directory_rsp
*)iov
[0].iov_base
;
2621 if (rc
== -ENODATA
&& rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
) {
2622 srch_inf
->endOfSearch
= true;
2625 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
2629 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2630 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2635 srch_inf
->unicode
= true;
2637 if (srch_inf
->ntwrk_buf_start
) {
2638 if (srch_inf
->smallBuf
)
2639 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
2641 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
2643 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
2644 srch_inf
->srch_entries_start
= srch_inf
->last_entry
= 4 /* rfclen */ +
2645 (char *)&rsp
->hdr
+ le16_to_cpu(rsp
->OutputBufferOffset
);
2646 /* 4 for rfc1002 length field */
2647 end_of_smb
= get_rfc1002_length(rsp
) + 4 + (char *)&rsp
->hdr
;
2648 srch_inf
->entries_in_buffer
=
2649 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
2650 &srch_inf
->last_entry
, info_buf_size
);
2651 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
2652 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
2653 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
2654 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
2655 if (resp_buftype
== CIFS_LARGE_BUFFER
)
2656 srch_inf
->smallBuf
= false;
2657 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
2658 srch_inf
->smallBuf
= true;
2660 cifs_dbg(VFS
, "illegal search buffer type\n");
2665 free_rsp_buf(resp_buftype
, rsp
);
2670 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2671 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, int info_class
,
2672 unsigned int num
, void **data
, unsigned int *size
)
2674 struct smb2_set_info_req
*req
;
2675 struct smb2_set_info_rsp
*rsp
= NULL
;
2680 struct TCP_Server_Info
*server
;
2681 struct cifs_ses
*ses
= tcon
->ses
;
2683 if (ses
&& (ses
->server
))
2684 server
= ses
->server
;
2691 iov
= kmalloc(sizeof(struct kvec
) * num
, GFP_KERNEL
);
2695 rc
= small_smb2_init(SMB2_SET_INFO
, tcon
, (void **) &req
);
2701 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
2703 req
->InfoType
= SMB2_O_INFO_FILE
;
2704 req
->FileInfoClass
= info_class
;
2705 req
->PersistentFileId
= persistent_fid
;
2706 req
->VolatileFileId
= volatile_fid
;
2708 /* 4 for RFC1001 length and 1 for Buffer */
2710 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1 - 4);
2711 req
->BufferLength
= cpu_to_le32(*size
);
2713 inc_rfc1001_len(req
, *size
- 1 /* Buffer */);
2715 memcpy(req
->Buffer
, *data
, *size
);
2717 iov
[0].iov_base
= (char *)req
;
2718 /* 4 for RFC1001 length */
2719 iov
[0].iov_len
= get_rfc1002_length(req
) + 4;
2721 for (i
= 1; i
< num
; i
++) {
2722 inc_rfc1001_len(req
, size
[i
]);
2723 le32_add_cpu(&req
->BufferLength
, size
[i
]);
2724 iov
[i
].iov_base
= (char *)data
[i
];
2725 iov
[i
].iov_len
= size
[i
];
2728 rc
= SendReceive2(xid
, ses
, iov
, num
, &resp_buftype
, 0);
2729 rsp
= (struct smb2_set_info_rsp
*)iov
[0].iov_base
;
2732 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
2734 free_rsp_buf(resp_buftype
, rsp
);
2740 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
2741 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2743 struct smb2_file_rename_info info
;
2745 unsigned int size
[2];
2747 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2749 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2753 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
2754 /* 0 = fail if target already exists */
2755 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2756 info
.FileNameLength
= cpu_to_le32(len
);
2759 size
[0] = sizeof(struct smb2_file_rename_info
);
2761 data
[1] = target_file
;
2762 size
[1] = len
+ 2 /* null */;
2764 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2765 current
->tgid
, FILE_RENAME_INFORMATION
, 2, data
,
2772 SMB2_rmdir(const unsigned int xid
, struct cifs_tcon
*tcon
,
2773 u64 persistent_fid
, u64 volatile_fid
)
2775 __u8 delete_pending
= 1;
2779 data
= &delete_pending
;
2780 size
= 1; /* sizeof __u8 */
2782 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2783 current
->tgid
, FILE_DISPOSITION_INFORMATION
, 1, &data
,
2788 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2789 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
2791 struct smb2_file_link_info info
;
2793 unsigned int size
[2];
2795 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
2797 data
= kmalloc(sizeof(void *) * 2, GFP_KERNEL
);
2801 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
2802 /* 0 = fail if link already exists */
2803 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
2804 info
.FileNameLength
= cpu_to_le32(len
);
2807 size
[0] = sizeof(struct smb2_file_link_info
);
2809 data
[1] = target_file
;
2810 size
[1] = len
+ 2 /* null */;
2812 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2813 current
->tgid
, FILE_LINK_INFORMATION
, 2, data
, size
);
2819 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2820 u64 volatile_fid
, u32 pid
, __le64
*eof
, bool is_falloc
)
2822 struct smb2_file_eof_info info
;
2826 info
.EndOfFile
= *eof
;
2829 size
= sizeof(struct smb2_file_eof_info
);
2832 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2833 pid
, FILE_ALLOCATION_INFORMATION
, 1, &data
, &size
);
2835 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2836 pid
, FILE_END_OF_FILE_INFORMATION
, 1, &data
, &size
);
2840 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2841 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
2844 size
= sizeof(FILE_BASIC_INFO
);
2845 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2846 current
->tgid
, FILE_BASIC_INFORMATION
, 1,
2847 (void **)&buf
, &size
);
2851 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
2852 const u64 persistent_fid
, const u64 volatile_fid
,
2856 struct smb2_oplock_break
*req
= NULL
;
2858 cifs_dbg(FYI
, "SMB2_oplock_break\n");
2859 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
2864 req
->VolatileFid
= volatile_fid
;
2865 req
->PersistentFid
= persistent_fid
;
2866 req
->OplockLevel
= oplock_level
;
2867 req
->hdr
.CreditRequest
= cpu_to_le16(1);
2869 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
2870 /* SMB2 buffer freed by function above */
2873 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
2874 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
2881 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
2882 struct kstatfs
*kst
)
2884 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
2885 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
2886 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
2887 kst
->f_bfree
= le64_to_cpu(pfs_inf
->ActualAvailableAllocationUnits
);
2888 kst
->f_bavail
= le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
2893 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
2894 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
2897 struct smb2_query_info_req
*req
;
2899 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
2901 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
2904 rc
= small_smb2_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
);
2908 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
2909 req
->FileInfoClass
= level
;
2910 req
->PersistentFileId
= persistent_fid
;
2911 req
->VolatileFileId
= volatile_fid
;
2912 /* 4 for rfc1002 length field and 1 for pad */
2913 req
->InputBufferOffset
=
2914 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1 - 4);
2915 req
->OutputBufferLength
= cpu_to_le32(
2916 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1 - 4);
2918 iov
->iov_base
= (char *)req
;
2919 /* 4 for rfc1002 length field */
2920 iov
->iov_len
= get_rfc1002_length(req
) + 4;
2925 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2926 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
2928 struct smb2_query_info_rsp
*rsp
= NULL
;
2932 struct cifs_ses
*ses
= tcon
->ses
;
2933 struct smb2_fs_full_size_info
*info
= NULL
;
2935 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
2936 sizeof(struct smb2_fs_full_size_info
),
2937 persistent_fid
, volatile_fid
);
2941 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2943 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2946 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2948 info
= (struct smb2_fs_full_size_info
*)(4 /* RFC1001 len */ +
2949 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)&rsp
->hdr
);
2950 rc
= validate_buf(le16_to_cpu(rsp
->OutputBufferOffset
),
2951 le32_to_cpu(rsp
->OutputBufferLength
), &rsp
->hdr
,
2952 sizeof(struct smb2_fs_full_size_info
));
2954 copy_fs_info_to_kstatfs(info
, fsdata
);
2957 free_rsp_buf(resp_buftype
, iov
.iov_base
);
2962 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
2963 u64 persistent_fid
, u64 volatile_fid
, int level
)
2965 struct smb2_query_info_rsp
*rsp
= NULL
;
2968 int resp_buftype
, max_len
, min_len
;
2969 struct cifs_ses
*ses
= tcon
->ses
;
2970 unsigned int rsp_len
, offset
;
2972 if (level
== FS_DEVICE_INFORMATION
) {
2973 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
2974 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
2975 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
2976 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
2977 min_len
= MIN_FS_ATTR_INFO_SIZE
;
2978 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
2979 max_len
= sizeof(struct smb3_fs_ss_info
);
2980 min_len
= sizeof(struct smb3_fs_ss_info
);
2982 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
2986 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
2987 persistent_fid
, volatile_fid
);
2991 rc
= SendReceive2(xid
, ses
, &iov
, 1, &resp_buftype
, 0);
2993 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2996 rsp
= (struct smb2_query_info_rsp
*)iov
.iov_base
;
2998 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
2999 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
3000 rc
= validate_buf(offset
, rsp_len
, &rsp
->hdr
, min_len
);
3004 if (level
== FS_ATTRIBUTE_INFORMATION
)
3005 memcpy(&tcon
->fsAttrInfo
, 4 /* RFC1001 len */ + offset
3006 + (char *)&rsp
->hdr
, min_t(unsigned int,
3008 else if (level
== FS_DEVICE_INFORMATION
)
3009 memcpy(&tcon
->fsDevInfo
, 4 /* RFC1001 len */ + offset
3010 + (char *)&rsp
->hdr
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
3011 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3012 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
3013 (4 /* RFC1001 len */ + offset
+ (char *)&rsp
->hdr
);
3014 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
3015 tcon
->perf_sector_size
=
3016 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
3020 free_rsp_buf(resp_buftype
, iov
.iov_base
);
3025 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
3026 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3027 const __u32 num_lock
, struct smb2_lock_element
*buf
)
3030 struct smb2_lock_req
*req
= NULL
;
3035 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
3037 rc
= small_smb2_init(SMB2_LOCK
, tcon
, (void **) &req
);
3041 req
->hdr
.ProcessId
= cpu_to_le32(pid
);
3042 req
->LockCount
= cpu_to_le16(num_lock
);
3044 req
->PersistentFileId
= persist_fid
;
3045 req
->VolatileFileId
= volatile_fid
;
3047 count
= num_lock
* sizeof(struct smb2_lock_element
);
3048 inc_rfc1001_len(req
, count
- sizeof(struct smb2_lock_element
));
3050 iov
[0].iov_base
= (char *)req
;
3051 /* 4 for rfc1002 length field and count for all locks */
3052 iov
[0].iov_len
= get_rfc1002_length(req
) + 4 - count
;
3053 iov
[1].iov_base
= (char *)buf
;
3054 iov
[1].iov_len
= count
;
3056 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
3057 rc
= SendReceive2(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, CIFS_NO_RESP
);
3059 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
3060 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
3067 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
3068 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3069 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
3072 struct smb2_lock_element lock
;
3074 lock
.Offset
= cpu_to_le64(offset
);
3075 lock
.Length
= cpu_to_le64(length
);
3076 lock
.Flags
= cpu_to_le32(lock_flags
);
3077 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
3078 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
3080 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
3084 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3085 __u8
*lease_key
, const __le32 lease_state
)
3088 struct smb2_lease_ack
*req
= NULL
;
3090 cifs_dbg(FYI
, "SMB2_lease_break\n");
3091 rc
= small_smb2_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
);
3096 req
->hdr
.CreditRequest
= cpu_to_le16(1);
3097 req
->StructureSize
= cpu_to_le16(36);
3098 inc_rfc1001_len(req
, 12);
3100 memcpy(req
->LeaseKey
, lease_key
, 16);
3101 req
->LeaseState
= lease_state
;
3103 rc
= SendReceiveNoRsp(xid
, tcon
->ses
, (char *) req
, CIFS_OBREAK_OP
);
3104 /* SMB2 buffer freed by function above */
3107 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3108 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);