4 * Copyright (C) International Business Machines Corp., 2009, 2013
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
9 * Contains the routines for constructing the SMB2 PDUs themselves
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
32 #include <linux/kernel.h>
33 #include <linux/vfs.h>
34 #include <linux/task_io_accounting_ops.h>
35 #include <linux/uaccess.h>
36 #include <linux/uuid.h>
37 #include <linux/pagemap.h>
38 #include <linux/xattr.h>
42 #include "cifsproto.h"
43 #include "smb2proto.h"
44 #include "cifs_unicode.h"
45 #include "cifs_debug.h"
47 #include "smb2status.h"
50 #include "cifs_spnego.h"
51 #include "smbdirect.h"
55 * The following table defines the expected "StructureSize" of SMB2 requests
56 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
58 * Note that commands are defined in smb2pdu.h in le16 but the array below is
59 * indexed by command in host byte order.
61 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
62 /* SMB2_NEGOTIATE */ 36,
63 /* SMB2_SESSION_SETUP */ 25,
65 /* SMB2_TREE_CONNECT */ 9,
66 /* SMB2_TREE_DISCONNECT */ 4,
76 /* SMB2_QUERY_DIRECTORY */ 33,
77 /* SMB2_CHANGE_NOTIFY */ 32,
78 /* SMB2_QUERY_INFO */ 41,
79 /* SMB2_SET_INFO */ 33,
80 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
83 static int smb3_encryption_required(const struct cifs_tcon
*tcon
)
87 if ((tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
) ||
88 (tcon
->share_flags
& SHI1005_FLAGS_ENCRYPT_DATA
))
91 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
97 smb2_hdr_assemble(struct smb2_sync_hdr
*shdr
, __le16 smb2_cmd
,
98 const struct cifs_tcon
*tcon
)
100 shdr
->ProtocolId
= SMB2_PROTO_NUMBER
;
101 shdr
->StructureSize
= cpu_to_le16(64);
102 shdr
->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 shdr
->CreditRequest
= cpu_to_le16(0);
111 shdr
->CreditRequest
= cpu_to_le16(
112 min_t(int, server
->max_credits
-
113 server
->credits
, 2));
114 spin_unlock(&server
->req_lock
);
116 shdr
->CreditRequest
= cpu_to_le16(2);
118 shdr
->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 shdr
->CreditCharge
= cpu_to_le16(1);
128 /* else CreditCharge MBZ */
130 shdr
->TreeId
= tcon
->tid
;
131 /* Uid is not converted */
133 shdr
->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 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
148 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
&&
149 !smb3_encryption_required(tcon
))
150 shdr
->Flags
|= SMB2_FLAGS_SIGNED
;
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
);
245 * Recheck after acquire mutex. If another thread is negotiating
246 * and the server never sends an answer the socket will be closed
247 * and tcpStatus set to reconnect.
249 if (server
->tcpStatus
== CifsNeedReconnect
) {
251 mutex_unlock(&tcon
->ses
->session_mutex
);
255 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
256 if (!rc
&& tcon
->ses
->need_reconnect
)
257 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
259 if (rc
|| !tcon
->need_reconnect
) {
260 mutex_unlock(&tcon
->ses
->session_mutex
);
264 cifs_mark_open_files_invalid(tcon
);
265 if (tcon
->use_persistent
)
266 tcon
->need_reopen_files
= true;
268 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
269 mutex_unlock(&tcon
->ses
->session_mutex
);
271 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
273 /* If sess reconnected but tcon didn't, something strange ... */
274 printk_once(KERN_WARNING
"reconnect tcon failed rc = %d\n", rc
);
278 if (smb2_command
!= SMB2_INTERNAL_CMD
)
279 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
281 atomic_inc(&tconInfoReconnectCount
);
284 * Check if handle based operation so we know whether we can continue
285 * or not without returning to caller to reset file handle.
288 * BB Is flush done by server on drop of tcp session? Should we special
289 * case it and skip above?
291 switch (smb2_command
) {
297 case SMB2_QUERY_DIRECTORY
:
298 case SMB2_CHANGE_NOTIFY
:
299 case SMB2_QUERY_INFO
:
303 unload_nls(nls_codepage
);
308 fill_small_buf(__le16 smb2_command
, struct cifs_tcon
*tcon
, void *buf
,
309 unsigned int *total_len
)
311 struct smb2_sync_pdu
*spdu
= (struct smb2_sync_pdu
*)buf
;
312 /* lookup word count ie StructureSize from table */
313 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_command
)];
316 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
317 * largest operations (Create)
321 smb2_hdr_assemble(&spdu
->sync_hdr
, smb2_command
, tcon
);
322 spdu
->StructureSize2
= cpu_to_le16(parmsize
);
324 *total_len
= parmsize
+ sizeof(struct smb2_sync_hdr
);
328 * Allocate and return pointer to an SMB request hdr, and set basic
329 * SMB information in the SMB header. If the return code is zero, this
330 * function must have filled in request_buf pointer.
333 smb2_plain_req_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
334 void **request_buf
, unsigned int *total_len
)
338 rc
= smb2_reconnect(smb2_command
, tcon
);
342 /* BB eventually switch this to SMB2 specific small buf size */
343 *request_buf
= cifs_small_buf_get();
344 if (*request_buf
== NULL
) {
345 /* BB should we add a retry in here if not a writepage? */
349 fill_small_buf(smb2_command
, tcon
,
350 (struct smb2_sync_hdr
*)(*request_buf
),
354 #ifdef CONFIG_CIFS_STATS2
355 uint16_t com_code
= le16_to_cpu(smb2_command
);
356 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
358 cifs_stats_inc(&tcon
->num_smbs_sent
);
364 #ifdef CONFIG_CIFS_SMB311
365 /* offset is sizeof smb2_negotiate_req but rounded up to 8 bytes */
366 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) */
369 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
370 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
371 #define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100)
374 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
376 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
377 pneg_ctxt
->DataLength
= cpu_to_le16(38);
378 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
379 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
380 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
381 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
385 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
387 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
388 pneg_ctxt
->DataLength
= cpu_to_le16(4); /* Cipher Count + le16 cipher */
389 pneg_ctxt
->CipherCount
= cpu_to_le16(1);
390 /* pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;*/ /* not supported yet */
391 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_CCM
;
395 build_posix_ctxt(struct smb2_posix_neg_context
*pneg_ctxt
)
397 pneg_ctxt
->ContextType
= SMB2_POSIX_EXTENSIONS_AVAILABLE
;
398 pneg_ctxt
->DataLength
= cpu_to_le16(POSIX_CTXT_DATA_LEN
);
402 assemble_neg_contexts(struct smb2_negotiate_req
*req
,
403 unsigned int *total_len
)
405 char *pneg_ctxt
= (char *)req
+ OFFSET_OF_NEG_CONTEXT
;
406 unsigned int ctxt_len
;
408 *total_len
+= 2; /* Add 2 due to round to 8 byte boundary for 1st ctxt */
409 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
410 ctxt_len
= DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context
), 8) * 8;
411 *total_len
+= ctxt_len
;
412 pneg_ctxt
+= ctxt_len
;
414 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
415 ctxt_len
= DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context
), 8) * 8;
416 *total_len
+= ctxt_len
;
417 pneg_ctxt
+= ctxt_len
;
419 build_posix_ctxt((struct smb2_posix_neg_context
*)pneg_ctxt
);
420 *total_len
+= sizeof(struct smb2_posix_neg_context
);
422 req
->NegotiateContextOffset
= cpu_to_le32(OFFSET_OF_NEG_CONTEXT
);
423 req
->NegotiateContextCount
= cpu_to_le16(3);
426 static void decode_preauth_context(struct smb2_preauth_neg_context
*ctxt
)
428 unsigned int len
= le16_to_cpu(ctxt
->DataLength
);
430 /* If invalid preauth context warn but use what we requested, SHA-512 */
431 if (len
< MIN_PREAUTH_CTXT_DATA_LEN
) {
432 printk_once(KERN_WARNING
"server sent bad preauth context\n");
435 if (le16_to_cpu(ctxt
->HashAlgorithmCount
) != 1)
436 printk_once(KERN_WARNING
"illegal SMB3 hash algorithm count\n");
437 if (ctxt
->HashAlgorithms
!= SMB2_PREAUTH_INTEGRITY_SHA512
)
438 printk_once(KERN_WARNING
"unknown SMB3 hash algorithm\n");
441 static int decode_encrypt_ctx(struct TCP_Server_Info
*server
,
442 struct smb2_encryption_neg_context
*ctxt
)
444 unsigned int len
= le16_to_cpu(ctxt
->DataLength
);
446 cifs_dbg(FYI
, "decode SMB3.11 encryption neg context of len %d\n", len
);
447 if (len
< MIN_ENCRYPT_CTXT_DATA_LEN
) {
448 printk_once(KERN_WARNING
"server sent bad crypto ctxt len\n");
452 if (le16_to_cpu(ctxt
->CipherCount
) != 1) {
453 printk_once(KERN_WARNING
"illegal SMB3.11 cipher count\n");
456 cifs_dbg(FYI
, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt
->Ciphers
[0]));
457 if ((ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES128_CCM
) &&
458 (ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES128_GCM
)) {
459 printk_once(KERN_WARNING
"invalid SMB3.11 cipher returned\n");
462 server
->cipher_type
= ctxt
->Ciphers
[0];
463 server
->capabilities
|= SMB2_GLOBAL_CAP_ENCRYPTION
;
467 static int smb311_decode_neg_context(struct smb2_negotiate_rsp
*rsp
,
468 struct TCP_Server_Info
*server
,
469 unsigned int len_of_smb
)
471 struct smb2_neg_context
*pctx
;
472 unsigned int offset
= le32_to_cpu(rsp
->NegotiateContextOffset
);
473 unsigned int ctxt_cnt
= le16_to_cpu(rsp
->NegotiateContextCount
);
474 unsigned int len_of_ctxts
, i
;
477 cifs_dbg(FYI
, "decoding %d negotiate contexts\n", ctxt_cnt
);
478 if (len_of_smb
<= offset
) {
479 cifs_dbg(VFS
, "Invalid response: negotiate context offset\n");
483 len_of_ctxts
= len_of_smb
- offset
;
485 for (i
= 0; i
< ctxt_cnt
; i
++) {
487 /* check that offset is not beyond end of SMB */
488 if (len_of_ctxts
== 0)
491 if (len_of_ctxts
< sizeof(struct smb2_neg_context
))
494 pctx
= (struct smb2_neg_context
*)(offset
+ (char *)rsp
);
495 clen
= le16_to_cpu(pctx
->DataLength
);
496 if (clen
> len_of_ctxts
)
499 if (pctx
->ContextType
== SMB2_PREAUTH_INTEGRITY_CAPABILITIES
)
500 decode_preauth_context(
501 (struct smb2_preauth_neg_context
*)pctx
);
502 else if (pctx
->ContextType
== SMB2_ENCRYPTION_CAPABILITIES
)
503 rc
= decode_encrypt_ctx(server
,
504 (struct smb2_encryption_neg_context
*)pctx
);
505 else if (pctx
->ContextType
== SMB2_POSIX_EXTENSIONS_AVAILABLE
)
506 server
->posix_ext_supported
= true;
508 cifs_dbg(VFS
, "unknown negcontext of type %d ignored\n",
509 le16_to_cpu(pctx
->ContextType
));
513 /* offsets must be 8 byte aligned */
514 clen
= (clen
+ 7) & ~0x7;
515 offset
+= clen
+ sizeof(struct smb2_neg_context
);
516 len_of_ctxts
-= clen
;
521 static struct create_posix
*
522 create_posix_buf(umode_t mode
)
524 struct create_posix
*buf
;
526 buf
= kzalloc(sizeof(struct create_posix
),
531 buf
->ccontext
.DataOffset
=
532 cpu_to_le16(offsetof(struct create_posix
, Mode
));
533 buf
->ccontext
.DataLength
= cpu_to_le32(4);
534 buf
->ccontext
.NameOffset
=
535 cpu_to_le16(offsetof(struct create_posix
, Name
));
536 buf
->ccontext
.NameLength
= cpu_to_le16(16);
538 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
549 buf
->Name
[10] = 0x83;
550 buf
->Name
[11] = 0xDE;
551 buf
->Name
[12] = 0x96;
552 buf
->Name
[13] = 0x8B;
553 buf
->Name
[14] = 0xCD;
554 buf
->Name
[15] = 0x7C;
555 buf
->Mode
= cpu_to_le32(mode
);
556 cifs_dbg(FYI
, "mode on posix create 0%o", mode
);
561 add_posix_context(struct kvec
*iov
, unsigned int *num_iovec
, umode_t mode
)
563 struct smb2_create_req
*req
= iov
[0].iov_base
;
564 unsigned int num
= *num_iovec
;
566 iov
[num
].iov_base
= create_posix_buf(mode
);
567 if (iov
[num
].iov_base
== NULL
)
569 iov
[num
].iov_len
= sizeof(struct create_posix
);
570 if (!req
->CreateContextsOffset
)
571 req
->CreateContextsOffset
= cpu_to_le32(
572 sizeof(struct smb2_create_req
) +
573 iov
[num
- 1].iov_len
);
574 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_posix
));
575 *num_iovec
= num
+ 1;
580 static void assemble_neg_contexts(struct smb2_negotiate_req
*req
,
581 unsigned int *total_len
)
589 * SMB2 Worker functions follow:
591 * The general structure of the worker functions is:
592 * 1) Call smb2_init (assembles SMB2 header)
593 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
594 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
595 * 4) Decode SMB2 command specific fields in the fixed length area
596 * 5) Decode variable length data area (if any for this SMB2 command type)
597 * 6) Call free smb buffer
603 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
605 struct smb2_negotiate_req
*req
;
606 struct smb2_negotiate_rsp
*rsp
;
611 struct TCP_Server_Info
*server
= ses
->server
;
612 int blob_offset
, blob_length
;
614 int flags
= CIFS_NEG_OP
;
615 unsigned int total_len
;
617 cifs_dbg(FYI
, "Negotiate protocol\n");
620 WARN(1, "%s: server is NULL!\n", __func__
);
624 rc
= smb2_plain_req_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
, &total_len
);
628 req
->sync_hdr
.SessionId
= 0;
629 #ifdef CONFIG_CIFS_SMB311
630 memset(server
->preauth_sha_hash
, 0, SMB2_PREAUTH_HASH_SIZE
);
631 memset(ses
->preauth_sha_hash
, 0, SMB2_PREAUTH_HASH_SIZE
);
634 if (strcmp(ses
->server
->vals
->version_string
,
635 SMB3ANY_VERSION_STRING
) == 0) {
636 req
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
637 req
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
638 req
->DialectCount
= cpu_to_le16(2);
640 } else if (strcmp(ses
->server
->vals
->version_string
,
641 SMBDEFAULT_VERSION_STRING
) == 0) {
642 req
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
643 req
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
644 req
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
645 req
->DialectCount
= cpu_to_le16(3);
648 /* otherwise send specific dialect */
649 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
650 req
->DialectCount
= cpu_to_le16(1);
654 /* only one of SMB2 signing flags may be set in SMB2 request */
656 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
657 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
658 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
660 req
->SecurityMode
= 0;
662 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
664 /* ClientGUID must be zero for SMB2.02 dialect */
665 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
666 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
668 memcpy(req
->ClientGUID
, server
->client_guid
,
669 SMB2_CLIENT_GUID_SIZE
);
670 if (ses
->server
->vals
->protocol_id
== SMB311_PROT_ID
)
671 assemble_neg_contexts(req
, &total_len
);
673 iov
[0].iov_base
= (char *)req
;
674 iov
[0].iov_len
= total_len
;
676 rc
= smb2_send_recv(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
677 cifs_small_buf_release(req
);
678 rsp
= (struct smb2_negotiate_rsp
*)rsp_iov
.iov_base
;
680 * No tcon so can't do
681 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
683 if (rc
== -EOPNOTSUPP
) {
684 cifs_dbg(VFS
, "Dialect not supported by server. Consider "
685 "specifying vers=1.0 or vers=2.0 on mount for accessing"
691 if (strcmp(ses
->server
->vals
->version_string
,
692 SMB3ANY_VERSION_STRING
) == 0) {
693 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
695 "SMB2 dialect returned but not requested\n");
697 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
699 "SMB2.1 dialect returned but not requested\n");
702 } else if (strcmp(ses
->server
->vals
->version_string
,
703 SMBDEFAULT_VERSION_STRING
) == 0) {
704 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
706 "SMB2 dialect returned but not requested\n");
708 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
709 /* ops set to 3.0 by default for default so update */
710 ses
->server
->ops
= &smb21_operations
;
712 } else if (le16_to_cpu(rsp
->DialectRevision
) !=
713 ses
->server
->vals
->protocol_id
) {
714 /* if requested single dialect ensure returned dialect matched */
715 cifs_dbg(VFS
, "Illegal 0x%x dialect returned: not requested\n",
716 le16_to_cpu(rsp
->DialectRevision
));
720 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
722 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
723 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
724 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
725 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
726 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
727 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
728 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
729 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
730 #ifdef CONFIG_CIFS_SMB311
731 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
732 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
735 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
736 le16_to_cpu(rsp
->DialectRevision
));
740 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
742 /* BB: add check that dialect was valid given dialect(s) we asked for */
744 #ifdef CONFIG_CIFS_SMB311
746 * Keep a copy of the hash after negprot. This hash will be
747 * the starting hash value for all sessions made from this
750 memcpy(server
->preauth_sha_hash
, ses
->preauth_sha_hash
,
751 SMB2_PREAUTH_HASH_SIZE
);
753 /* SMB2 only has an extended negflavor */
754 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
755 /* set it to the maximum buffer size value we can send with 1 credit */
756 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
757 SMB2_MAX_BUFFER_SIZE
);
758 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
759 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
760 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
761 if ((server
->sec_mode
& SMB2_SEC_MODE_FLAGS_ALL
) != server
->sec_mode
)
762 cifs_dbg(FYI
, "Server returned unexpected security mode 0x%x\n",
764 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
766 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
768 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
769 (struct smb2_sync_hdr
*)rsp
);
771 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
773 * ses->sectype = RawNTLMSSP;
774 * but for time being this is our only auth choice so doesn't matter.
775 * We just found a server which sets blob length to zero expecting raw.
777 if (blob_length
== 0) {
778 cifs_dbg(FYI
, "missing security blob on negprot\n");
779 server
->sec_ntlmssp
= true;
782 rc
= cifs_enable_signing(server
, ses
->sign
);
786 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
793 #ifdef CONFIG_CIFS_SMB311
794 if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
)) {
795 if (rsp
->NegotiateContextCount
)
796 rc
= smb311_decode_neg_context(rsp
, server
,
799 cifs_dbg(VFS
, "Missing expected negotiate contexts\n");
801 #endif /* CONFIG_CIFS_SMB311 */
803 free_rsp_buf(resp_buftype
, rsp
);
807 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
810 struct validate_negotiate_info_req
*pneg_inbuf
;
811 struct validate_negotiate_info_rsp
*pneg_rsp
= NULL
;
813 u32 inbuflen
; /* max of 4 dialects */
815 cifs_dbg(FYI
, "validate negotiate\n");
817 /* In SMB3.11 preauth integrity supersedes validate negotiate */
818 if (tcon
->ses
->server
->dialect
== SMB311_PROT_ID
)
822 * validation ioctl must be signed, so no point sending this if we
823 * can not sign it (ie are not known user). Even if signing is not
824 * required (enabled but not negotiated), in those cases we selectively
825 * sign just this, the first and only signed request on a connection.
826 * Having validation of negotiate info helps reduce attack vectors.
828 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
)
829 return 0; /* validation requires signing */
831 if (tcon
->ses
->user_name
== NULL
) {
832 cifs_dbg(FYI
, "Can't validate negotiate: null user mount\n");
833 return 0; /* validation requires signing */
836 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_NULL
)
837 cifs_dbg(VFS
, "Unexpected null user (anonymous) auth flag sent by server\n");
839 pneg_inbuf
= kmalloc(sizeof(*pneg_inbuf
), GFP_NOFS
);
843 pneg_inbuf
->Capabilities
=
844 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
845 memcpy(pneg_inbuf
->Guid
, tcon
->ses
->server
->client_guid
,
846 SMB2_CLIENT_GUID_SIZE
);
849 pneg_inbuf
->SecurityMode
=
850 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
851 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
852 pneg_inbuf
->SecurityMode
=
853 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
855 pneg_inbuf
->SecurityMode
= 0;
858 if (strcmp(tcon
->ses
->server
->vals
->version_string
,
859 SMB3ANY_VERSION_STRING
) == 0) {
860 pneg_inbuf
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
861 pneg_inbuf
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
862 pneg_inbuf
->DialectCount
= cpu_to_le16(2);
863 /* structure is big enough for 3 dialects, sending only 2 */
864 inbuflen
= sizeof(*pneg_inbuf
) -
865 sizeof(pneg_inbuf
->Dialects
[0]);
866 } else if (strcmp(tcon
->ses
->server
->vals
->version_string
,
867 SMBDEFAULT_VERSION_STRING
) == 0) {
868 pneg_inbuf
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
869 pneg_inbuf
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
870 pneg_inbuf
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
871 pneg_inbuf
->DialectCount
= cpu_to_le16(3);
872 /* structure is big enough for 3 dialects */
873 inbuflen
= sizeof(*pneg_inbuf
);
875 /* otherwise specific dialect was requested */
876 pneg_inbuf
->Dialects
[0] =
877 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
878 pneg_inbuf
->DialectCount
= cpu_to_le16(1);
879 /* structure is big enough for 3 dialects, sending only 1 */
880 inbuflen
= sizeof(*pneg_inbuf
) -
881 sizeof(pneg_inbuf
->Dialects
[0]) * 2;
884 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
885 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
886 (char *)pneg_inbuf
, inbuflen
, (char **)&pneg_rsp
, &rsplen
);
889 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
895 if (rsplen
!= sizeof(*pneg_rsp
)) {
896 cifs_dbg(VFS
, "invalid protocol negotiate response size: %d\n",
899 /* relax check since Mac returns max bufsize allowed on ioctl */
900 if (rsplen
> CIFSMaxBufSize
|| rsplen
< sizeof(*pneg_rsp
))
904 /* check validate negotiate info response matches what we got earlier */
905 if (pneg_rsp
->Dialect
!= cpu_to_le16(tcon
->ses
->server
->dialect
))
908 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
911 /* do not validate server guid because not saved at negprot time yet */
913 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
914 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
917 /* validate negotiate successful */
919 cifs_dbg(FYI
, "validate negotiate info successful\n");
923 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
932 smb2_select_sectype(struct TCP_Server_Info
*server
, enum securityEnum requested
)
941 if (server
->sec_ntlmssp
&&
942 (global_secflags
& CIFSSEC_MAY_NTLMSSP
))
944 if ((server
->sec_kerberos
|| server
->sec_mskerberos
) &&
945 (global_secflags
& CIFSSEC_MAY_KRB5
))
953 struct SMB2_sess_data
{
955 struct cifs_ses
*ses
;
956 struct nls_table
*nls_cp
;
957 void (*func
)(struct SMB2_sess_data
*);
959 u64 previous_session
;
961 /* we will send the SMB in three pieces:
962 * a fixed length beginning part, an optional
963 * SPNEGO blob (which can be zero length), and a
964 * last part which will include the strings
965 * and rest of bcc area. This allows us to avoid
966 * a large buffer 17K allocation
973 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
976 struct cifs_ses
*ses
= sess_data
->ses
;
977 struct smb2_sess_setup_req
*req
;
978 struct TCP_Server_Info
*server
= ses
->server
;
979 unsigned int total_len
;
981 rc
= smb2_plain_req_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
,
986 /* First session, not a reauthenticate */
987 req
->sync_hdr
.SessionId
= 0;
989 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
990 req
->PreviousSessionId
= sess_data
->previous_session
;
992 req
->Flags
= 0; /* MBZ */
993 /* to enable echos and oplocks */
994 req
->sync_hdr
.CreditRequest
= cpu_to_le16(3);
996 /* only one of SMB2 signing flags may be set in SMB2 request */
998 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
999 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
1000 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
1002 req
->SecurityMode
= 0;
1004 req
->Capabilities
= 0;
1005 req
->Channel
= 0; /* MBZ */
1007 sess_data
->iov
[0].iov_base
= (char *)req
;
1009 sess_data
->iov
[0].iov_len
= total_len
- 1;
1011 * This variable will be used to clear the buffer
1012 * allocated above in case of any error in the calling function.
1014 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
1020 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
1022 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
1023 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1027 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
1030 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
1031 struct kvec rsp_iov
= { NULL
, 0 };
1033 /* Testing shows that buffer offset must be at location of Buffer[0] */
1034 req
->SecurityBufferOffset
=
1035 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) - 1 /* pad */);
1036 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
1038 /* BB add code to build os and lm fields */
1040 rc
= smb2_send_recv(sess_data
->xid
, sess_data
->ses
,
1042 &sess_data
->buf0_type
,
1043 CIFS_LOG_ERROR
| CIFS_NEG_OP
, &rsp_iov
);
1044 cifs_small_buf_release(sess_data
->iov
[0].iov_base
);
1045 memcpy(&sess_data
->iov
[0], &rsp_iov
, sizeof(struct kvec
));
1051 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
1054 struct cifs_ses
*ses
= sess_data
->ses
;
1056 mutex_lock(&ses
->server
->srv_mutex
);
1057 if (ses
->server
->ops
->generate_signingkey
) {
1058 rc
= ses
->server
->ops
->generate_signingkey(ses
);
1061 "SMB3 session key generation failed\n");
1062 mutex_unlock(&ses
->server
->srv_mutex
);
1066 if (!ses
->server
->session_estab
) {
1067 ses
->server
->sequence_number
= 0x2;
1068 ses
->server
->session_estab
= true;
1070 mutex_unlock(&ses
->server
->srv_mutex
);
1072 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
1073 spin_lock(&GlobalMid_Lock
);
1074 ses
->status
= CifsGood
;
1075 ses
->need_reconnect
= false;
1076 spin_unlock(&GlobalMid_Lock
);
1080 #ifdef CONFIG_CIFS_UPCALL
1082 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1085 struct cifs_ses
*ses
= sess_data
->ses
;
1086 struct cifs_spnego_msg
*msg
;
1087 struct key
*spnego_key
= NULL
;
1088 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1090 rc
= SMB2_sess_alloc_buffer(sess_data
);
1094 spnego_key
= cifs_get_spnego_key(ses
);
1095 if (IS_ERR(spnego_key
)) {
1096 rc
= PTR_ERR(spnego_key
);
1101 msg
= spnego_key
->payload
.data
[0];
1103 * check version field to make sure that cifs.upcall is
1104 * sending us a response in an expected form
1106 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
1108 "bad cifs.upcall version. Expected %d got %d",
1109 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
1111 goto out_put_spnego_key
;
1114 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
1116 if (!ses
->auth_key
.response
) {
1118 "Kerberos can't allocate (%u bytes) memory",
1121 goto out_put_spnego_key
;
1123 ses
->auth_key
.len
= msg
->sesskey_len
;
1125 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
1126 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
1128 rc
= SMB2_sess_sendreceive(sess_data
);
1130 goto out_put_spnego_key
;
1132 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1133 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1135 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1137 rc
= SMB2_sess_establish_session(sess_data
);
1139 key_invalidate(spnego_key
);
1140 key_put(spnego_key
);
1142 sess_data
->result
= rc
;
1143 sess_data
->func
= NULL
;
1144 SMB2_sess_free_buffer(sess_data
);
1148 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1150 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
1151 sess_data
->result
= -EOPNOTSUPP
;
1152 sess_data
->func
= NULL
;
1157 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
1160 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
1163 struct cifs_ses
*ses
= sess_data
->ses
;
1164 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1165 char *ntlmssp_blob
= NULL
;
1166 bool use_spnego
= false; /* else use raw ntlmssp */
1167 u16 blob_length
= 0;
1170 * If memory allocation is successful, caller of this function
1173 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
1174 if (!ses
->ntlmssp
) {
1178 ses
->ntlmssp
->sesskey_per_smbsess
= true;
1180 rc
= SMB2_sess_alloc_buffer(sess_data
);
1184 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
1186 if (ntlmssp_blob
== NULL
) {
1191 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
1193 /* BB eventually need to add this */
1194 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1198 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
1199 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1201 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1202 sess_data
->iov
[1].iov_len
= blob_length
;
1204 rc
= SMB2_sess_sendreceive(sess_data
);
1205 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1207 /* If true, rc here is expected and not an error */
1208 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
1209 rsp
->sync_hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
1215 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) !=
1216 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
1217 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
1218 le16_to_cpu(rsp
->SecurityBufferOffset
));
1222 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
1223 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
1227 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
1230 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1231 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1234 kfree(ntlmssp_blob
);
1235 SMB2_sess_free_buffer(sess_data
);
1237 sess_data
->result
= 0;
1238 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
1242 kfree(ses
->ntlmssp
);
1243 ses
->ntlmssp
= NULL
;
1244 sess_data
->result
= rc
;
1245 sess_data
->func
= NULL
;
1249 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
1252 struct cifs_ses
*ses
= sess_data
->ses
;
1253 struct smb2_sess_setup_req
*req
;
1254 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1255 unsigned char *ntlmssp_blob
= NULL
;
1256 bool use_spnego
= false; /* else use raw ntlmssp */
1257 u16 blob_length
= 0;
1259 rc
= SMB2_sess_alloc_buffer(sess_data
);
1263 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
1264 req
->sync_hdr
.SessionId
= ses
->Suid
;
1266 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
, ses
,
1269 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
1274 /* BB eventually need to add this */
1275 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1279 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1280 sess_data
->iov
[1].iov_len
= blob_length
;
1282 rc
= SMB2_sess_sendreceive(sess_data
);
1286 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1288 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1289 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1291 rc
= SMB2_sess_establish_session(sess_data
);
1293 kfree(ntlmssp_blob
);
1294 SMB2_sess_free_buffer(sess_data
);
1295 kfree(ses
->ntlmssp
);
1296 ses
->ntlmssp
= NULL
;
1297 sess_data
->result
= rc
;
1298 sess_data
->func
= NULL
;
1302 SMB2_select_sec(struct cifs_ses
*ses
, struct SMB2_sess_data
*sess_data
)
1306 type
= smb2_select_sectype(ses
->server
, ses
->sectype
);
1307 cifs_dbg(FYI
, "sess setup type %d\n", type
);
1308 if (type
== Unspecified
) {
1310 "Unable to select appropriate authentication method!");
1316 sess_data
->func
= SMB2_auth_kerberos
;
1319 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
1322 cifs_dbg(VFS
, "secType %d not supported!\n", type
);
1330 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
1331 const struct nls_table
*nls_cp
)
1334 struct TCP_Server_Info
*server
= ses
->server
;
1335 struct SMB2_sess_data
*sess_data
;
1337 cifs_dbg(FYI
, "Session Setup\n");
1340 WARN(1, "%s: server is NULL!\n", __func__
);
1344 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
1348 rc
= SMB2_select_sec(ses
, sess_data
);
1351 sess_data
->xid
= xid
;
1352 sess_data
->ses
= ses
;
1353 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1354 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1355 sess_data
->previous_session
= ses
->Suid
;
1357 #ifdef CONFIG_CIFS_SMB311
1359 * Initialize the session hash with the server one.
1361 memcpy(ses
->preauth_sha_hash
, ses
->server
->preauth_sha_hash
,
1362 SMB2_PREAUTH_HASH_SIZE
);
1365 while (sess_data
->func
)
1366 sess_data
->func(sess_data
);
1368 if ((ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
) && (ses
->sign
))
1369 cifs_dbg(VFS
, "signing requested but authenticated as guest\n");
1370 rc
= sess_data
->result
;
1377 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1379 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1381 struct TCP_Server_Info
*server
;
1383 unsigned int total_len
;
1385 struct kvec rsp_iov
;
1388 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1390 if (ses
&& (ses
->server
))
1391 server
= ses
->server
;
1395 /* no need to send SMB logoff if uid already closed due to reconnect */
1396 if (ses
->need_reconnect
)
1397 goto smb2_session_already_dead
;
1399 rc
= smb2_plain_req_init(SMB2_LOGOFF
, NULL
, (void **) &req
, &total_len
);
1403 /* since no tcon, smb2_init can not do this, so do here */
1404 req
->sync_hdr
.SessionId
= ses
->Suid
;
1406 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
1407 flags
|= CIFS_TRANSFORM_REQ
;
1408 else if (server
->sign
)
1409 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1411 flags
|= CIFS_NO_RESP
;
1413 iov
[0].iov_base
= (char *)req
;
1414 iov
[0].iov_len
= total_len
;
1416 rc
= smb2_send_recv(xid
, ses
, iov
, 1, &resp_buf_type
, flags
, &rsp_iov
);
1417 cifs_small_buf_release(req
);
1419 * No tcon so can't do
1420 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1423 smb2_session_already_dead
:
1427 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1429 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1432 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1434 /* These are similar values to what Windows uses */
1435 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1437 tcon
->max_chunks
= 256;
1438 tcon
->max_bytes_chunk
= 1048576;
1439 tcon
->max_bytes_copy
= 16777216;
1443 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1444 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1446 struct smb2_tree_connect_req
*req
;
1447 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1449 struct kvec rsp_iov
= { NULL
, 0 };
1453 __le16
*unc_path
= NULL
;
1455 unsigned int total_len
;
1457 cifs_dbg(FYI
, "TCON\n");
1459 if (!(ses
->server
) || !tree
)
1462 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1463 if (unc_path
== NULL
)
1466 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1468 if (unc_path_len
< 2) {
1473 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1476 rc
= smb2_plain_req_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
,
1483 if (smb3_encryption_required(tcon
))
1484 flags
|= CIFS_TRANSFORM_REQ
;
1486 iov
[0].iov_base
= (char *)req
;
1488 iov
[0].iov_len
= total_len
- 1;
1490 /* Testing shows that buffer offset must be at location of Buffer[0] */
1491 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1493 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1494 iov
[1].iov_base
= unc_path
;
1495 iov
[1].iov_len
= unc_path_len
;
1497 /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
1498 if ((ses
->server
->dialect
== SMB311_PROT_ID
) &&
1499 !smb3_encryption_required(tcon
))
1500 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1502 rc
= smb2_send_recv(xid
, ses
, iov
, 2, &resp_buftype
, flags
, &rsp_iov
);
1503 cifs_small_buf_release(req
);
1504 rsp
= (struct smb2_tree_connect_rsp
*)rsp_iov
.iov_base
;
1508 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1509 tcon
->need_reconnect
= true;
1511 goto tcon_error_exit
;
1514 switch (rsp
->ShareType
) {
1515 case SMB2_SHARE_TYPE_DISK
:
1516 cifs_dbg(FYI
, "connection to disk share\n");
1518 case SMB2_SHARE_TYPE_PIPE
:
1520 cifs_dbg(FYI
, "connection to pipe share\n");
1522 case SMB2_SHARE_TYPE_PRINT
:
1524 cifs_dbg(FYI
, "connection to printer\n");
1527 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1529 goto tcon_error_exit
;
1532 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1533 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1534 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1535 tcon
->tidStatus
= CifsGood
;
1536 tcon
->need_reconnect
= false;
1537 tcon
->tid
= rsp
->sync_hdr
.TreeId
;
1538 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1540 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1541 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1542 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1545 !(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
1546 cifs_dbg(VFS
, "Encryption is requested but not supported\n");
1548 init_copy_chunk_defaults(tcon
);
1549 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1550 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1552 free_rsp_buf(resp_buftype
, rsp
);
1557 if (rsp
&& rsp
->sync_hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1558 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1564 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1566 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1568 struct cifs_ses
*ses
= tcon
->ses
;
1570 unsigned int total_len
;
1572 struct kvec rsp_iov
;
1575 cifs_dbg(FYI
, "Tree Disconnect\n");
1577 if (!ses
|| !(ses
->server
))
1580 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1583 rc
= smb2_plain_req_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
,
1588 if (smb3_encryption_required(tcon
))
1589 flags
|= CIFS_TRANSFORM_REQ
;
1591 flags
|= CIFS_NO_RESP
;
1593 iov
[0].iov_base
= (char *)req
;
1594 iov
[0].iov_len
= total_len
;
1596 rc
= smb2_send_recv(xid
, ses
, iov
, 1, &resp_buf_type
, flags
, &rsp_iov
);
1597 cifs_small_buf_release(req
);
1599 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1605 static struct create_durable
*
1606 create_durable_buf(void)
1608 struct create_durable
*buf
;
1610 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1614 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1615 (struct create_durable
, Data
));
1616 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1617 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1618 (struct create_durable
, Name
));
1619 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1620 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1628 static struct create_durable
*
1629 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1631 struct create_durable
*buf
;
1633 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1637 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1638 (struct create_durable
, Data
));
1639 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1640 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1641 (struct create_durable
, Name
));
1642 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1643 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1644 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1645 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1654 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1655 unsigned int *epoch
, char *lease_key
)
1658 struct create_context
*cc
;
1660 unsigned int remaining
;
1663 data_offset
= (char *)rsp
+ le32_to_cpu(rsp
->CreateContextsOffset
);
1664 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
1665 cc
= (struct create_context
*)data_offset
;
1666 while (remaining
>= sizeof(struct create_context
)) {
1667 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1668 if (le16_to_cpu(cc
->NameLength
) == 4 &&
1669 strncmp(name
, "RqLs", 4) == 0)
1670 return server
->ops
->parse_lease_buf(cc
, epoch
,
1673 next
= le32_to_cpu(cc
->Next
);
1677 cc
= (struct create_context
*)((char *)cc
+ next
);
1684 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1685 unsigned int *num_iovec
, __u8
*oplock
)
1687 struct smb2_create_req
*req
= iov
[0].iov_base
;
1688 unsigned int num
= *num_iovec
;
1690 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1691 if (iov
[num
].iov_base
== NULL
)
1693 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1694 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1695 if (!req
->CreateContextsOffset
)
1696 req
->CreateContextsOffset
= cpu_to_le32(
1697 sizeof(struct smb2_create_req
) +
1698 iov
[num
- 1].iov_len
);
1699 le32_add_cpu(&req
->CreateContextsLength
,
1700 server
->vals
->create_lease_size
);
1701 *num_iovec
= num
+ 1;
1705 static struct create_durable_v2
*
1706 create_durable_v2_buf(struct cifs_fid
*pfid
)
1708 struct create_durable_v2
*buf
;
1710 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1714 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1715 (struct create_durable_v2
, dcontext
));
1716 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1717 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1718 (struct create_durable_v2
, Name
));
1719 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1721 buf
->dcontext
.Timeout
= 0; /* Should this be configurable by workload */
1722 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1723 generate_random_uuid(buf
->dcontext
.CreateGuid
);
1724 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1726 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1734 static struct create_durable_handle_reconnect_v2
*
1735 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1737 struct create_durable_handle_reconnect_v2
*buf
;
1739 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1744 buf
->ccontext
.DataOffset
=
1745 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1747 buf
->ccontext
.DataLength
=
1748 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1749 buf
->ccontext
.NameOffset
=
1750 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1752 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1754 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1755 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1756 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1757 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1759 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1768 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1769 struct cifs_open_parms
*oparms
)
1771 struct smb2_create_req
*req
= iov
[0].iov_base
;
1772 unsigned int num
= *num_iovec
;
1774 iov
[num
].iov_base
= create_durable_v2_buf(oparms
->fid
);
1775 if (iov
[num
].iov_base
== NULL
)
1777 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1778 if (!req
->CreateContextsOffset
)
1779 req
->CreateContextsOffset
=
1780 cpu_to_le32(sizeof(struct smb2_create_req
) +
1782 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1783 *num_iovec
= num
+ 1;
1788 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1789 struct cifs_open_parms
*oparms
)
1791 struct smb2_create_req
*req
= iov
[0].iov_base
;
1792 unsigned int num
= *num_iovec
;
1794 /* indicate that we don't need to relock the file */
1795 oparms
->reconnect
= false;
1797 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1798 if (iov
[num
].iov_base
== NULL
)
1800 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1801 if (!req
->CreateContextsOffset
)
1802 req
->CreateContextsOffset
=
1803 cpu_to_le32(sizeof(struct smb2_create_req
) +
1805 le32_add_cpu(&req
->CreateContextsLength
,
1806 sizeof(struct create_durable_handle_reconnect_v2
));
1807 *num_iovec
= num
+ 1;
1812 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1813 struct cifs_open_parms
*oparms
, bool use_persistent
)
1815 struct smb2_create_req
*req
= iov
[0].iov_base
;
1816 unsigned int num
= *num_iovec
;
1818 if (use_persistent
) {
1819 if (oparms
->reconnect
)
1820 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1823 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1826 if (oparms
->reconnect
) {
1827 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1828 /* indicate that we don't need to relock the file */
1829 oparms
->reconnect
= false;
1831 iov
[num
].iov_base
= create_durable_buf();
1832 if (iov
[num
].iov_base
== NULL
)
1834 iov
[num
].iov_len
= sizeof(struct create_durable
);
1835 if (!req
->CreateContextsOffset
)
1836 req
->CreateContextsOffset
=
1837 cpu_to_le32(sizeof(struct smb2_create_req
) +
1839 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1840 *num_iovec
= num
+ 1;
1845 alloc_path_with_tree_prefix(__le16
**out_path
, int *out_size
, int *out_len
,
1846 const char *treename
, const __le16
*path
)
1848 int treename_len
, path_len
;
1849 struct nls_table
*cp
;
1850 const __le16 sep
[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1855 treename_len
= strlen(treename
);
1856 if (treename_len
< 2 || !(treename
[0] == '\\' && treename
[1] == '\\'))
1862 path_len
= UniStrnlen((wchar_t *)path
, PATH_MAX
);
1865 * make room for one path separator between the treename and
1868 *out_len
= treename_len
+ 1 + path_len
;
1871 * final path needs to be null-terminated UTF16 with a
1875 *out_size
= roundup((*out_len
+1)*2, 8);
1876 *out_path
= kzalloc(*out_size
, GFP_KERNEL
);
1880 cp
= load_nls_default();
1881 cifs_strtoUTF16(*out_path
, treename
, treename_len
, cp
);
1882 UniStrcat(*out_path
, sep
);
1883 UniStrcat(*out_path
, path
);
1890 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
1891 __u8
*oplock
, struct smb2_file_all_info
*buf
,
1892 struct kvec
*err_iov
, int *buftype
)
1894 struct smb2_create_req
*req
;
1895 struct smb2_create_rsp
*rsp
;
1896 struct TCP_Server_Info
*server
;
1897 struct cifs_tcon
*tcon
= oparms
->tcon
;
1898 struct cifs_ses
*ses
= tcon
->ses
;
1899 struct kvec iov
[5]; /* make sure at least one for each open context */
1900 struct kvec rsp_iov
= {NULL
, 0};
1903 __le16
*copy_path
= NULL
;
1906 unsigned int n_iov
= 2;
1907 __u32 file_attributes
= 0;
1908 char *dhc_buf
= NULL
, *lc_buf
= NULL
, *pc_buf
= NULL
;
1910 unsigned int total_len
;
1912 cifs_dbg(FYI
, "create/open\n");
1914 if (ses
&& (ses
->server
))
1915 server
= ses
->server
;
1919 rc
= smb2_plain_req_init(SMB2_CREATE
, tcon
, (void **) &req
, &total_len
);
1924 if (smb3_encryption_required(tcon
))
1925 flags
|= CIFS_TRANSFORM_REQ
;
1927 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
1928 file_attributes
|= ATTR_READONLY
;
1929 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
1930 file_attributes
|= ATTR_SYSTEM
;
1932 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1933 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
1934 /* File attributes ignored on open (used in create though) */
1935 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1936 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1937 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
1938 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
1940 iov
[0].iov_base
= (char *)req
;
1941 /* -1 since last byte is buf[0] which is sent below (path) */
1942 iov
[0].iov_len
= total_len
- 1;
1944 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
));
1946 /* [MS-SMB2] 2.2.13 NameOffset:
1947 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1948 * the SMB2 header, the file name includes a prefix that will
1949 * be processed during DFS name normalization as specified in
1950 * section 3.3.5.9. Otherwise, the file name is relative to
1951 * the share that is identified by the TreeId in the SMB2
1954 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
1957 req
->sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
1958 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
1960 tcon
->treeName
, path
);
1962 cifs_small_buf_release(req
);
1965 req
->NameLength
= cpu_to_le16(name_len
* 2);
1966 uni_path_len
= copy_size
;
1969 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
1970 /* MUST set path len (NameLength) to 0 opening root of share */
1971 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1972 if (uni_path_len
% 8 != 0) {
1973 copy_size
= roundup(uni_path_len
, 8);
1974 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1976 cifs_small_buf_release(req
);
1979 memcpy((char *)copy_path
, (const char *)path
,
1981 uni_path_len
= copy_size
;
1986 iov
[1].iov_len
= uni_path_len
;
1987 iov
[1].iov_base
= path
;
1989 if (!server
->oplocks
)
1990 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1992 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
1993 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
1994 req
->RequestedOplockLevel
= *oplock
;
1996 rc
= add_lease_context(server
, iov
, &n_iov
, oplock
);
1998 cifs_small_buf_release(req
);
2002 lc_buf
= iov
[n_iov
-1].iov_base
;
2005 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
2006 /* need to set Next field of lease context if we request it */
2007 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
2008 struct create_context
*ccontext
=
2009 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2011 cpu_to_le32(server
->vals
->create_lease_size
);
2014 rc
= add_durable_context(iov
, &n_iov
, oparms
,
2015 tcon
->use_persistent
);
2017 cifs_small_buf_release(req
);
2022 dhc_buf
= iov
[n_iov
-1].iov_base
;
2025 #ifdef CONFIG_CIFS_SMB311
2026 if (tcon
->posix_extensions
) {
2028 struct create_context
*ccontext
=
2029 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2031 cpu_to_le32(iov
[n_iov
-1].iov_len
);
2034 rc
= add_posix_context(iov
, &n_iov
, oparms
->mode
);
2036 cifs_small_buf_release(req
);
2042 pc_buf
= iov
[n_iov
-1].iov_base
;
2046 rc
= smb2_send_recv(xid
, ses
, iov
, n_iov
, &resp_buftype
, flags
,
2048 cifs_small_buf_release(req
);
2049 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
2052 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
2053 if (err_iov
&& rsp
) {
2055 *buftype
= resp_buftype
;
2056 resp_buftype
= CIFS_NO_BUFFER
;
2059 trace_smb3_open_err(xid
, tcon
->tid
, ses
->Suid
,
2060 oparms
->create_options
, oparms
->desired_access
, rc
);
2063 trace_smb3_open_done(xid
, rsp
->PersistentFileId
, tcon
->tid
,
2064 ses
->Suid
, oparms
->create_options
,
2065 oparms
->desired_access
);
2067 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
2068 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
2071 memcpy(buf
, &rsp
->CreationTime
, 32);
2072 buf
->AllocationSize
= rsp
->AllocationSize
;
2073 buf
->EndOfFile
= rsp
->EndofFile
;
2074 buf
->Attributes
= rsp
->FileAttributes
;
2075 buf
->NumberOfLinks
= cpu_to_le32(1);
2076 buf
->DeletePending
= 0;
2079 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
2080 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
,
2081 oparms
->fid
->lease_key
);
2083 *oplock
= rsp
->OplockLevel
;
2089 free_rsp_buf(resp_buftype
, rsp
);
2094 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2097 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2098 u64 volatile_fid
, u32 opcode
, bool is_fsctl
,
2099 char *in_data
, u32 indatalen
,
2100 char **out_data
, u32
*plen
/* returned data len */)
2102 struct smb2_ioctl_req
*req
;
2103 struct smb2_ioctl_rsp
*rsp
;
2104 struct cifs_ses
*ses
;
2106 struct kvec rsp_iov
;
2111 unsigned int total_len
;
2113 cifs_dbg(FYI
, "SMB2 IOCTL\n");
2115 if (out_data
!= NULL
)
2118 /* zero out returned data len, in case of error */
2127 if (!ses
|| !(ses
->server
))
2130 rc
= smb2_plain_req_init(SMB2_IOCTL
, tcon
, (void **) &req
, &total_len
);
2134 if (smb3_encryption_required(tcon
))
2135 flags
|= CIFS_TRANSFORM_REQ
;
2137 req
->CtlCode
= cpu_to_le32(opcode
);
2138 req
->PersistentFileId
= persistent_fid
;
2139 req
->VolatileFileId
= volatile_fid
;
2142 req
->InputCount
= cpu_to_le32(indatalen
);
2143 /* do not set InputOffset if no input data */
2145 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
));
2146 iov
[1].iov_base
= in_data
;
2147 iov
[1].iov_len
= indatalen
;
2152 req
->OutputOffset
= 0;
2153 req
->OutputCount
= 0; /* MBZ */
2156 * Could increase MaxOutputResponse, but that would require more
2157 * than one credit. Windows typically sets this smaller, but for some
2158 * ioctls it may be useful to allow server to send more. No point
2159 * limiting what the server can send as long as fits in one credit
2160 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
2161 * (by default, note that it can be overridden to make max larger)
2162 * in responses (except for read responses which can be bigger.
2163 * We may want to bump this limit up
2165 req
->MaxOutputResponse
= cpu_to_le32(CIFSMaxBufSize
);
2168 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
2172 iov
[0].iov_base
= (char *)req
;
2175 * If no input data, the size of ioctl struct in
2176 * protocol spec still includes a 1 byte data buffer,
2177 * but if input data passed to ioctl, we do not
2178 * want to double count this, so we do not send
2179 * the dummy one byte of data in iovec[0] if sending
2180 * input data (in iovec[1]).
2184 iov
[0].iov_len
= total_len
- 1;
2186 iov
[0].iov_len
= total_len
;
2188 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2189 if (opcode
== FSCTL_VALIDATE_NEGOTIATE_INFO
)
2190 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
2192 rc
= smb2_send_recv(xid
, ses
, iov
, n_iov
, &resp_buftype
, flags
,
2194 cifs_small_buf_release(req
);
2195 rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
.iov_base
;
2198 trace_smb3_fsctl_err(xid
, persistent_fid
, tcon
->tid
,
2199 ses
->Suid
, 0, opcode
, rc
);
2201 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
2202 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
2204 } else if (rc
== -EINVAL
) {
2205 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
2206 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
2207 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
2212 /* check if caller wants to look at return data or just return rc */
2213 if ((plen
== NULL
) || (out_data
== NULL
))
2216 *plen
= le32_to_cpu(rsp
->OutputCount
);
2218 /* We check for obvious errors in the output buffer length and offset */
2220 goto ioctl_exit
; /* server returned no data */
2221 else if (*plen
> 0xFF00) {
2222 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
2228 if (rsp_iov
.iov_len
< le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
2229 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
2230 le32_to_cpu(rsp
->OutputOffset
));
2236 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
2237 if (*out_data
== NULL
) {
2242 memcpy(*out_data
, (char *)rsp
+ le32_to_cpu(rsp
->OutputOffset
), *plen
);
2244 free_rsp_buf(resp_buftype
, rsp
);
2249 * Individual callers to ioctl worker function follow
2253 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
2254 u64 persistent_fid
, u64 volatile_fid
)
2257 struct compress_ioctl fsctl_input
;
2258 char *ret_data
= NULL
;
2260 fsctl_input
.CompressionState
=
2261 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
2263 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
2264 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
2265 (char *)&fsctl_input
/* data input */,
2266 2 /* in data len */, &ret_data
/* out data */, NULL
);
2268 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
2274 SMB2_close_flags(const unsigned int xid
, struct cifs_tcon
*tcon
,
2275 u64 persistent_fid
, u64 volatile_fid
, int flags
)
2277 struct smb2_close_req
*req
;
2278 struct smb2_close_rsp
*rsp
;
2279 struct cifs_ses
*ses
= tcon
->ses
;
2281 struct kvec rsp_iov
;
2284 unsigned int total_len
;
2286 cifs_dbg(FYI
, "Close\n");
2288 if (!ses
|| !(ses
->server
))
2291 rc
= smb2_plain_req_init(SMB2_CLOSE
, tcon
, (void **) &req
, &total_len
);
2295 if (smb3_encryption_required(tcon
))
2296 flags
|= CIFS_TRANSFORM_REQ
;
2298 req
->PersistentFileId
= persistent_fid
;
2299 req
->VolatileFileId
= volatile_fid
;
2301 iov
[0].iov_base
= (char *)req
;
2302 iov
[0].iov_len
= total_len
;
2304 rc
= smb2_send_recv(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2305 cifs_small_buf_release(req
);
2306 rsp
= (struct smb2_close_rsp
*)rsp_iov
.iov_base
;
2309 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
2310 trace_smb3_close_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
2315 /* BB FIXME - decode close response, update inode for caching */
2318 free_rsp_buf(resp_buftype
, rsp
);
2323 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
2324 u64 persistent_fid
, u64 volatile_fid
)
2326 return SMB2_close_flags(xid
, tcon
, persistent_fid
, volatile_fid
, 0);
2330 validate_iov(unsigned int offset
, unsigned int buffer_length
,
2331 struct kvec
*iov
, unsigned int min_buf_size
)
2333 unsigned int smb_len
= iov
->iov_len
;
2334 char *end_of_smb
= smb_len
+ (char *)iov
->iov_base
;
2335 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
2336 char *end_of_buf
= begin_of_buf
+ buffer_length
;
2339 if (buffer_length
< min_buf_size
) {
2340 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
2341 buffer_length
, min_buf_size
);
2345 /* check if beyond RFC1001 maximum length */
2346 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
2347 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
2348 buffer_length
, smb_len
);
2352 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
2353 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
2361 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2362 * Caller must free buffer.
2365 validate_and_copy_iov(unsigned int offset
, unsigned int buffer_length
,
2366 struct kvec
*iov
, unsigned int minbufsize
,
2369 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
2375 rc
= validate_iov(offset
, buffer_length
, iov
, minbufsize
);
2379 memcpy(data
, begin_of_buf
, buffer_length
);
2385 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2386 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
, u8 info_type
,
2387 u32 additional_info
, size_t output_len
, size_t min_len
, void **data
,
2390 struct smb2_query_info_req
*req
;
2391 struct smb2_query_info_rsp
*rsp
= NULL
;
2393 struct kvec rsp_iov
;
2396 struct cifs_ses
*ses
= tcon
->ses
;
2398 unsigned int total_len
;
2400 cifs_dbg(FYI
, "Query Info\n");
2402 if (!ses
|| !(ses
->server
))
2405 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
,
2410 if (smb3_encryption_required(tcon
))
2411 flags
|= CIFS_TRANSFORM_REQ
;
2413 req
->InfoType
= info_type
;
2414 req
->FileInfoClass
= info_class
;
2415 req
->PersistentFileId
= persistent_fid
;
2416 req
->VolatileFileId
= volatile_fid
;
2417 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
2420 * We do not use the input buffer (do not send extra byte)
2422 req
->InputBufferOffset
= 0;
2424 req
->OutputBufferLength
= cpu_to_le32(output_len
);
2426 iov
[0].iov_base
= (char *)req
;
2428 iov
[0].iov_len
= total_len
- 1;
2430 rc
= smb2_send_recv(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2431 cifs_small_buf_release(req
);
2432 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
2435 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2436 trace_smb3_query_info_err(xid
, persistent_fid
, tcon
->tid
,
2437 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
2442 *dlen
= le32_to_cpu(rsp
->OutputBufferLength
);
2444 *data
= kmalloc(*dlen
, GFP_KERNEL
);
2447 "Error %d allocating memory for acl\n",
2455 rc
= validate_and_copy_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
2456 le32_to_cpu(rsp
->OutputBufferLength
),
2457 &rsp_iov
, min_len
, *data
);
2460 free_rsp_buf(resp_buftype
, rsp
);
2464 int SMB2_query_eas(const unsigned int xid
, struct cifs_tcon
*tcon
,
2465 u64 persistent_fid
, u64 volatile_fid
,
2466 int ea_buf_size
, struct smb2_file_full_ea_info
*data
)
2468 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2469 FILE_FULL_EA_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2471 sizeof(struct smb2_file_full_ea_info
),
2476 int SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2477 u64 persistent_fid
, u64 volatile_fid
, struct smb2_file_all_info
*data
)
2479 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2480 FILE_ALL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2481 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
2482 sizeof(struct smb2_file_all_info
), (void **)&data
,
2487 SMB2_query_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
2488 u64 persistent_fid
, u64 volatile_fid
,
2489 void **data
, u32
*plen
)
2491 __u32 additional_info
= OWNER_SECINFO
| GROUP_SECINFO
| DACL_SECINFO
;
2494 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2495 0, SMB2_O_INFO_SECURITY
, additional_info
,
2496 SMB2_MAX_BUFFER_SIZE
, MIN_SEC_DESC_LEN
, data
, plen
);
2500 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
2501 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
2503 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2504 FILE_INTERNAL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2505 sizeof(struct smb2_file_internal_info
),
2506 sizeof(struct smb2_file_internal_info
),
2507 (void **)&uniqueid
, NULL
);
2511 * This is a no-op for now. We're not really interested in the reply, but
2512 * rather in the fact that the server sent one and that server->lstrp
2515 * FIXME: maybe we should consider checking that the reply matches request?
2518 smb2_echo_callback(struct mid_q_entry
*mid
)
2520 struct TCP_Server_Info
*server
= mid
->callback_data
;
2521 struct smb2_echo_rsp
*rsp
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
2522 unsigned int credits_received
= 1;
2524 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
2525 credits_received
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
2527 DeleteMidQEntry(mid
);
2528 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
2531 void smb2_reconnect_server(struct work_struct
*work
)
2533 struct TCP_Server_Info
*server
= container_of(work
,
2534 struct TCP_Server_Info
, reconnect
.work
);
2535 struct cifs_ses
*ses
;
2536 struct cifs_tcon
*tcon
, *tcon2
;
2537 struct list_head tmp_list
;
2538 int tcon_exist
= false;
2540 int resched
= false;
2543 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2544 mutex_lock(&server
->reconnect_mutex
);
2546 INIT_LIST_HEAD(&tmp_list
);
2547 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
2549 spin_lock(&cifs_tcp_ses_lock
);
2550 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
2551 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
2552 if (tcon
->need_reconnect
|| tcon
->need_reopen_files
) {
2554 list_add_tail(&tcon
->rlist
, &tmp_list
);
2558 if (ses
->tcon_ipc
&& ses
->tcon_ipc
->need_reconnect
) {
2559 list_add_tail(&ses
->tcon_ipc
->rlist
, &tmp_list
);
2564 * Get the reference to server struct to be sure that the last call of
2565 * cifs_put_tcon() in the loop below won't release the server pointer.
2568 server
->srv_count
++;
2570 spin_unlock(&cifs_tcp_ses_lock
);
2572 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
2573 rc
= smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
);
2575 cifs_reopen_persistent_handles(tcon
);
2578 list_del_init(&tcon
->rlist
);
2579 cifs_put_tcon(tcon
);
2582 cifs_dbg(FYI
, "Reconnecting tcons finished\n");
2584 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 2 * HZ
);
2585 mutex_unlock(&server
->reconnect_mutex
);
2587 /* now we can safely release srv struct */
2589 cifs_put_tcp_session(server
, 1);
2593 SMB2_echo(struct TCP_Server_Info
*server
)
2595 struct smb2_echo_req
*req
;
2598 struct smb_rqst rqst
= { .rq_iov
= iov
,
2600 unsigned int total_len
;
2601 __be32 rfc1002_marker
;
2603 cifs_dbg(FYI
, "In echo request\n");
2605 if (server
->tcpStatus
== CifsNeedNegotiate
) {
2606 /* No need to send echo on newly established connections */
2607 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
2611 rc
= smb2_plain_req_init(SMB2_ECHO
, NULL
, (void **)&req
, &total_len
);
2615 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
2618 rfc1002_marker
= cpu_to_be32(total_len
);
2619 iov
[0].iov_base
= &rfc1002_marker
;
2620 iov
[1].iov_len
= total_len
;
2621 iov
[1].iov_base
= (char *)req
;
2623 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, NULL
,
2624 server
, CIFS_ECHO_OP
);
2626 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
2628 cifs_small_buf_release(req
);
2633 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2636 struct smb2_flush_req
*req
;
2637 struct cifs_ses
*ses
= tcon
->ses
;
2639 struct kvec rsp_iov
;
2643 unsigned int total_len
;
2645 cifs_dbg(FYI
, "Flush\n");
2647 if (!ses
|| !(ses
->server
))
2650 rc
= smb2_plain_req_init(SMB2_FLUSH
, tcon
, (void **) &req
, &total_len
);
2654 if (smb3_encryption_required(tcon
))
2655 flags
|= CIFS_TRANSFORM_REQ
;
2657 req
->PersistentFileId
= persistent_fid
;
2658 req
->VolatileFileId
= volatile_fid
;
2660 iov
[0].iov_base
= (char *)req
;
2661 iov
[0].iov_len
= total_len
;
2663 rc
= smb2_send_recv(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2664 cifs_small_buf_release(req
);
2667 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
2668 trace_smb3_flush_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
2672 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2677 * To form a chain of read requests, any read requests after the first should
2678 * have the end_of_chain boolean set to true.
2681 smb2_new_read_req(void **buf
, unsigned int *total_len
,
2682 struct cifs_io_parms
*io_parms
, struct cifs_readdata
*rdata
,
2683 unsigned int remaining_bytes
, int request_type
)
2686 struct smb2_read_plain_req
*req
= NULL
;
2687 struct smb2_sync_hdr
*shdr
;
2688 struct TCP_Server_Info
*server
;
2690 rc
= smb2_plain_req_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
,
2695 server
= io_parms
->tcon
->ses
->server
;
2697 return -ECONNABORTED
;
2699 shdr
= &req
->sync_hdr
;
2700 shdr
->ProcessId
= cpu_to_le32(io_parms
->pid
);
2702 req
->PersistentFileId
= io_parms
->persistent_fid
;
2703 req
->VolatileFileId
= io_parms
->volatile_fid
;
2704 req
->ReadChannelInfoOffset
= 0; /* reserved */
2705 req
->ReadChannelInfoLength
= 0; /* reserved */
2706 req
->Channel
= 0; /* reserved */
2707 req
->MinimumCount
= 0;
2708 req
->Length
= cpu_to_le32(io_parms
->length
);
2709 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2710 #ifdef CONFIG_CIFS_SMB_DIRECT
2712 * If we want to do a RDMA write, fill in and append
2713 * smbd_buffer_descriptor_v1 to the end of read request
2715 if (server
->rdma
&& rdata
&& !server
->sign
&&
2716 rdata
->bytes
>= server
->smbd_conn
->rdma_readwrite_threshold
) {
2718 struct smbd_buffer_descriptor_v1
*v1
;
2719 bool need_invalidate
=
2720 io_parms
->tcon
->ses
->server
->dialect
== SMB30_PROT_ID
;
2722 rdata
->mr
= smbd_register_mr(
2723 server
->smbd_conn
, rdata
->pages
,
2724 rdata
->nr_pages
, rdata
->page_offset
,
2725 rdata
->tailsz
, true, need_invalidate
);
2729 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
2730 if (need_invalidate
)
2731 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
2732 req
->ReadChannelInfoOffset
=
2733 cpu_to_le16(offsetof(struct smb2_read_plain_req
, Buffer
));
2734 req
->ReadChannelInfoLength
=
2735 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
2736 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
2737 v1
->offset
= cpu_to_le64(rdata
->mr
->mr
->iova
);
2738 v1
->token
= cpu_to_le32(rdata
->mr
->mr
->rkey
);
2739 v1
->length
= cpu_to_le32(rdata
->mr
->mr
->length
);
2741 *total_len
+= sizeof(*v1
) - 1;
2744 if (request_type
& CHAINED_REQUEST
) {
2745 if (!(request_type
& END_OF_CHAIN
)) {
2746 /* next 8-byte aligned request */
2747 *total_len
= DIV_ROUND_UP(*total_len
, 8) * 8;
2748 shdr
->NextCommand
= cpu_to_le32(*total_len
);
2749 } else /* END_OF_CHAIN */
2750 shdr
->NextCommand
= 0;
2751 if (request_type
& RELATED_REQUEST
) {
2752 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
2754 * Related requests use info from previous read request
2757 shdr
->SessionId
= 0xFFFFFFFF;
2758 shdr
->TreeId
= 0xFFFFFFFF;
2759 req
->PersistentFileId
= 0xFFFFFFFF;
2760 req
->VolatileFileId
= 0xFFFFFFFF;
2763 if (remaining_bytes
> io_parms
->length
)
2764 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
2766 req
->RemainingBytes
= 0;
2773 smb2_readv_callback(struct mid_q_entry
*mid
)
2775 struct cifs_readdata
*rdata
= mid
->callback_data
;
2776 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2777 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2778 struct smb2_sync_hdr
*shdr
=
2779 (struct smb2_sync_hdr
*)rdata
->iov
[0].iov_base
;
2780 unsigned int credits_received
= 1;
2781 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2783 .rq_pages
= rdata
->pages
,
2784 .rq_offset
= rdata
->page_offset
,
2785 .rq_npages
= rdata
->nr_pages
,
2786 .rq_pagesz
= rdata
->pagesz
,
2787 .rq_tailsz
= rdata
->tailsz
};
2789 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2790 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
2793 switch (mid
->mid_state
) {
2794 case MID_RESPONSE_RECEIVED
:
2795 credits_received
= le16_to_cpu(shdr
->CreditRequest
);
2796 /* result already set, check signature */
2797 if (server
->sign
&& !mid
->decrypted
) {
2800 rc
= smb2_verify_signature(&rqst
, server
);
2802 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
2805 /* FIXME: should this be counted toward the initiating task? */
2806 task_io_account_read(rdata
->got_bytes
);
2807 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2809 case MID_REQUEST_SUBMITTED
:
2810 case MID_RETRY_NEEDED
:
2811 rdata
->result
= -EAGAIN
;
2812 if (server
->sign
&& rdata
->got_bytes
)
2813 /* reset bytes number since we can not check a sign */
2814 rdata
->got_bytes
= 0;
2815 /* FIXME: should this be counted toward the initiating task? */
2816 task_io_account_read(rdata
->got_bytes
);
2817 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
2820 if (rdata
->result
!= -ENODATA
)
2821 rdata
->result
= -EIO
;
2823 #ifdef CONFIG_CIFS_SMB_DIRECT
2825 * If this rdata has a memmory registered, the MR can be freed
2826 * MR needs to be freed as soon as I/O finishes to prevent deadlock
2827 * because they have limited number and are used for future I/Os
2830 smbd_deregister_mr(rdata
->mr
);
2835 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
2837 queue_work(cifsiod_wq
, &rdata
->work
);
2838 DeleteMidQEntry(mid
);
2839 add_credits(server
, credits_received
, 0);
2842 /* smb2_async_readv - send an async read, and set up mid to handle result */
2844 smb2_async_readv(struct cifs_readdata
*rdata
)
2848 struct smb2_sync_hdr
*shdr
;
2849 struct cifs_io_parms io_parms
;
2850 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2852 struct TCP_Server_Info
*server
;
2853 unsigned int total_len
;
2856 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
2857 __func__
, rdata
->offset
, rdata
->bytes
);
2859 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2860 io_parms
.offset
= rdata
->offset
;
2861 io_parms
.length
= rdata
->bytes
;
2862 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
2863 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
2864 io_parms
.pid
= rdata
->pid
;
2866 server
= io_parms
.tcon
->ses
->server
;
2868 rc
= smb2_new_read_req(
2869 (void **) &buf
, &total_len
, &io_parms
, rdata
, 0, 0);
2871 if (rc
== -EAGAIN
&& rdata
->credits
) {
2872 /* credits was reset by reconnect */
2874 /* reduce in_flight value since we won't send the req */
2875 spin_lock(&server
->req_lock
);
2876 server
->in_flight
--;
2877 spin_unlock(&server
->req_lock
);
2882 if (smb3_encryption_required(io_parms
.tcon
))
2883 flags
|= CIFS_TRANSFORM_REQ
;
2885 req_len
= cpu_to_be32(total_len
);
2887 rdata
->iov
[0].iov_base
= &req_len
;
2888 rdata
->iov
[0].iov_len
= sizeof(__be32
);
2889 rdata
->iov
[1].iov_base
= buf
;
2890 rdata
->iov
[1].iov_len
= total_len
;
2892 shdr
= (struct smb2_sync_hdr
*)buf
;
2894 if (rdata
->credits
) {
2895 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
2896 SMB2_MAX_BUFFER_SIZE
));
2897 shdr
->CreditRequest
= shdr
->CreditCharge
;
2898 spin_lock(&server
->req_lock
);
2899 server
->credits
+= rdata
->credits
-
2900 le16_to_cpu(shdr
->CreditCharge
);
2901 spin_unlock(&server
->req_lock
);
2902 wake_up(&server
->request_q
);
2903 flags
|= CIFS_HAS_CREDITS
;
2906 kref_get(&rdata
->refcount
);
2907 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
2908 cifs_readv_receive
, smb2_readv_callback
,
2909 smb3_handle_read_data
, rdata
, flags
);
2911 kref_put(&rdata
->refcount
, cifs_readdata_release
);
2912 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
2913 trace_smb3_read_err(rc
, 0 /* xid */, io_parms
.persistent_fid
,
2914 io_parms
.tcon
->tid
, io_parms
.tcon
->ses
->Suid
,
2915 io_parms
.offset
, io_parms
.length
);
2917 trace_smb3_read_done(0 /* xid */, io_parms
.persistent_fid
,
2918 io_parms
.tcon
->tid
, io_parms
.tcon
->ses
->Suid
,
2919 io_parms
.offset
, io_parms
.length
);
2921 cifs_small_buf_release(buf
);
2926 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
2927 unsigned int *nbytes
, char **buf
, int *buf_type
)
2929 int resp_buftype
, rc
= -EACCES
;
2930 struct smb2_read_plain_req
*req
= NULL
;
2931 struct smb2_read_rsp
*rsp
= NULL
;
2933 struct kvec rsp_iov
;
2934 unsigned int total_len
;
2935 int flags
= CIFS_LOG_ERROR
;
2936 struct cifs_ses
*ses
= io_parms
->tcon
->ses
;
2939 rc
= smb2_new_read_req((void **)&req
, &total_len
, io_parms
, NULL
, 0, 0);
2943 if (smb3_encryption_required(io_parms
->tcon
))
2944 flags
|= CIFS_TRANSFORM_REQ
;
2946 iov
[0].iov_base
= (char *)req
;
2947 iov
[0].iov_len
= total_len
;
2949 rc
= smb2_send_recv(xid
, ses
, iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
2950 cifs_small_buf_release(req
);
2952 rsp
= (struct smb2_read_rsp
*)rsp_iov
.iov_base
;
2955 if (rc
!= -ENODATA
) {
2956 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
2957 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
2959 trace_smb3_read_err(rc
, xid
, req
->PersistentFileId
,
2960 io_parms
->tcon
->tid
, ses
->Suid
,
2961 io_parms
->offset
, io_parms
->length
);
2962 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2963 return rc
== -ENODATA
? 0 : rc
;
2965 trace_smb3_read_done(xid
, req
->PersistentFileId
,
2966 io_parms
->tcon
->tid
, ses
->Suid
,
2967 io_parms
->offset
, io_parms
->length
);
2969 *nbytes
= le32_to_cpu(rsp
->DataLength
);
2970 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
2971 (*nbytes
> io_parms
->length
)) {
2972 cifs_dbg(FYI
, "bad length %d for count %d\n",
2973 *nbytes
, io_parms
->length
);
2979 memcpy(*buf
, (char *)rsp
+ rsp
->DataOffset
, *nbytes
);
2980 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2981 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
2982 *buf
= rsp_iov
.iov_base
;
2983 if (resp_buftype
== CIFS_SMALL_BUFFER
)
2984 *buf_type
= CIFS_SMALL_BUFFER
;
2985 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
2986 *buf_type
= CIFS_LARGE_BUFFER
;
2992 * Check the mid_state and signature on received buffer (if any), and queue the
2993 * workqueue completion task.
2996 smb2_writev_callback(struct mid_q_entry
*mid
)
2998 struct cifs_writedata
*wdata
= mid
->callback_data
;
2999 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
3000 unsigned int written
;
3001 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
3002 unsigned int credits_received
= 1;
3004 switch (mid
->mid_state
) {
3005 case MID_RESPONSE_RECEIVED
:
3006 credits_received
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
3007 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
3008 if (wdata
->result
!= 0)
3011 written
= le32_to_cpu(rsp
->DataLength
);
3013 * Mask off high 16 bits when bytes written as returned
3014 * by the server is greater than bytes requested by the
3015 * client. OS/2 servers are known to set incorrect
3018 if (written
> wdata
->bytes
)
3021 if (written
< wdata
->bytes
)
3022 wdata
->result
= -ENOSPC
;
3024 wdata
->bytes
= written
;
3026 case MID_REQUEST_SUBMITTED
:
3027 case MID_RETRY_NEEDED
:
3028 wdata
->result
= -EAGAIN
;
3031 wdata
->result
= -EIO
;
3034 #ifdef CONFIG_CIFS_SMB_DIRECT
3036 * If this wdata has a memory registered, the MR can be freed
3037 * The number of MRs available is limited, it's important to recover
3038 * used MR as soon as I/O is finished. Hold MR longer in the later
3039 * I/O process can possibly result in I/O deadlock due to lack of MR
3040 * to send request on I/O retry
3043 smbd_deregister_mr(wdata
->mr
);
3048 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
3050 queue_work(cifsiod_wq
, &wdata
->work
);
3051 DeleteMidQEntry(mid
);
3052 add_credits(tcon
->ses
->server
, credits_received
, 0);
3055 /* smb2_async_writev - send an async write, and set up mid to handle result */
3057 smb2_async_writev(struct cifs_writedata
*wdata
,
3058 void (*release
)(struct kref
*kref
))
3060 int rc
= -EACCES
, flags
= 0;
3061 struct smb2_write_req
*req
= NULL
;
3062 struct smb2_sync_hdr
*shdr
;
3063 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
3064 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
3066 struct smb_rqst rqst
= { };
3067 unsigned int total_len
;
3068 __be32 rfc1002_marker
;
3070 rc
= smb2_plain_req_init(SMB2_WRITE
, tcon
, (void **) &req
, &total_len
);
3072 if (rc
== -EAGAIN
&& wdata
->credits
) {
3073 /* credits was reset by reconnect */
3075 /* reduce in_flight value since we won't send the req */
3076 spin_lock(&server
->req_lock
);
3077 server
->in_flight
--;
3078 spin_unlock(&server
->req_lock
);
3080 goto async_writev_out
;
3083 if (smb3_encryption_required(tcon
))
3084 flags
|= CIFS_TRANSFORM_REQ
;
3086 shdr
= (struct smb2_sync_hdr
*)req
;
3087 shdr
->ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
3089 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
3090 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
3091 req
->WriteChannelInfoOffset
= 0;
3092 req
->WriteChannelInfoLength
= 0;
3094 req
->Offset
= cpu_to_le64(wdata
->offset
);
3095 req
->DataOffset
= cpu_to_le16(
3096 offsetof(struct smb2_write_req
, Buffer
));
3097 req
->RemainingBytes
= 0;
3098 #ifdef CONFIG_CIFS_SMB_DIRECT
3100 * If we want to do a server RDMA read, fill in and append
3101 * smbd_buffer_descriptor_v1 to the end of write request
3103 if (server
->rdma
&& !server
->sign
&& wdata
->bytes
>=
3104 server
->smbd_conn
->rdma_readwrite_threshold
) {
3106 struct smbd_buffer_descriptor_v1
*v1
;
3107 bool need_invalidate
= server
->dialect
== SMB30_PROT_ID
;
3109 wdata
->mr
= smbd_register_mr(
3110 server
->smbd_conn
, wdata
->pages
,
3111 wdata
->nr_pages
, wdata
->page_offset
,
3112 wdata
->tailsz
, false, need_invalidate
);
3115 goto async_writev_out
;
3118 req
->DataOffset
= 0;
3119 if (wdata
->nr_pages
> 1)
3120 req
->RemainingBytes
=
3122 (wdata
->nr_pages
- 1) * wdata
->pagesz
-
3123 wdata
->page_offset
+ wdata
->tailsz
3126 req
->RemainingBytes
= cpu_to_le32(wdata
->tailsz
);
3127 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
3128 if (need_invalidate
)
3129 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
3130 req
->WriteChannelInfoOffset
=
3131 cpu_to_le16(offsetof(struct smb2_write_req
, Buffer
));
3132 req
->WriteChannelInfoLength
=
3133 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
3134 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
3135 v1
->offset
= cpu_to_le64(wdata
->mr
->mr
->iova
);
3136 v1
->token
= cpu_to_le32(wdata
->mr
->mr
->rkey
);
3137 v1
->length
= cpu_to_le32(wdata
->mr
->mr
->length
);
3140 /* 4 for rfc1002 length field and 1 for Buffer */
3142 rfc1002_marker
= cpu_to_be32(total_len
- 1 + wdata
->bytes
);
3143 iov
[0].iov_base
= &rfc1002_marker
;
3144 iov
[1].iov_len
= total_len
- 1;
3145 iov
[1].iov_base
= (char *)req
;
3149 rqst
.rq_pages
= wdata
->pages
;
3150 rqst
.rq_offset
= wdata
->page_offset
;
3151 rqst
.rq_npages
= wdata
->nr_pages
;
3152 rqst
.rq_pagesz
= wdata
->pagesz
;
3153 rqst
.rq_tailsz
= wdata
->tailsz
;
3154 #ifdef CONFIG_CIFS_SMB_DIRECT
3156 iov
[1].iov_len
+= sizeof(struct smbd_buffer_descriptor_v1
);
3160 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
3161 wdata
->offset
, wdata
->bytes
);
3163 #ifdef CONFIG_CIFS_SMB_DIRECT
3164 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3166 req
->Length
= cpu_to_le32(wdata
->bytes
);
3168 req
->Length
= cpu_to_le32(wdata
->bytes
);
3171 if (wdata
->credits
) {
3172 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
3173 SMB2_MAX_BUFFER_SIZE
));
3174 shdr
->CreditRequest
= shdr
->CreditCharge
;
3175 spin_lock(&server
->req_lock
);
3176 server
->credits
+= wdata
->credits
-
3177 le16_to_cpu(shdr
->CreditCharge
);
3178 spin_unlock(&server
->req_lock
);
3179 wake_up(&server
->request_q
);
3180 flags
|= CIFS_HAS_CREDITS
;
3183 kref_get(&wdata
->refcount
);
3184 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, NULL
,
3188 trace_smb3_write_err(0 /* no xid */, req
->PersistentFileId
,
3189 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
3191 kref_put(&wdata
->refcount
, release
);
3192 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
3194 trace_smb3_write_done(0 /* no xid */, req
->PersistentFileId
,
3195 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
3199 cifs_small_buf_release(req
);
3204 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3205 * The length field from io_parms must be at least 1 and indicates a number of
3206 * elements with data to write that begins with position 1 in iov array. All
3207 * data length is specified by count.
3210 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
3211 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
3214 struct smb2_write_req
*req
= NULL
;
3215 struct smb2_write_rsp
*rsp
= NULL
;
3217 struct kvec rsp_iov
;
3219 unsigned int total_len
;
3226 rc
= smb2_plain_req_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
,
3231 if (io_parms
->tcon
->ses
->server
== NULL
)
3232 return -ECONNABORTED
;
3234 if (smb3_encryption_required(io_parms
->tcon
))
3235 flags
|= CIFS_TRANSFORM_REQ
;
3237 req
->sync_hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
3239 req
->PersistentFileId
= io_parms
->persistent_fid
;
3240 req
->VolatileFileId
= io_parms
->volatile_fid
;
3241 req
->WriteChannelInfoOffset
= 0;
3242 req
->WriteChannelInfoLength
= 0;
3244 req
->Length
= cpu_to_le32(io_parms
->length
);
3245 req
->Offset
= cpu_to_le64(io_parms
->offset
);
3246 req
->DataOffset
= cpu_to_le16(
3247 offsetof(struct smb2_write_req
, Buffer
));
3248 req
->RemainingBytes
= 0;
3250 iov
[0].iov_base
= (char *)req
;
3252 iov
[0].iov_len
= total_len
- 1;
3254 rc
= smb2_send_recv(xid
, io_parms
->tcon
->ses
, iov
, n_vec
+ 1,
3255 &resp_buftype
, flags
, &rsp_iov
);
3256 cifs_small_buf_release(req
);
3257 rsp
= (struct smb2_write_rsp
*)rsp_iov
.iov_base
;
3260 trace_smb3_write_err(xid
, req
->PersistentFileId
,
3261 io_parms
->tcon
->tid
,
3262 io_parms
->tcon
->ses
->Suid
,
3263 io_parms
->offset
, io_parms
->length
, rc
);
3264 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
3265 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
3267 *nbytes
= le32_to_cpu(rsp
->DataLength
);
3268 trace_smb3_write_done(xid
, req
->PersistentFileId
,
3269 io_parms
->tcon
->tid
,
3270 io_parms
->tcon
->ses
->Suid
,
3271 io_parms
->offset
, *nbytes
);
3274 free_rsp_buf(resp_buftype
, rsp
);
3279 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
3282 unsigned int entrycount
= 0;
3283 unsigned int next_offset
= 0;
3284 FILE_DIRECTORY_INFO
*entryptr
;
3286 if (bufstart
== NULL
)
3289 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
3292 entryptr
= (FILE_DIRECTORY_INFO
*)
3293 ((char *)entryptr
+ next_offset
);
3295 if ((char *)entryptr
+ size
> end_of_buf
) {
3296 cifs_dbg(VFS
, "malformed search entry would overflow\n");
3300 len
= le32_to_cpu(entryptr
->FileNameLength
);
3301 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
3302 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
3307 *lastentry
= (char *)entryptr
;
3310 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
3322 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
3323 u64 persistent_fid
, u64 volatile_fid
, int index
,
3324 struct cifs_search_info
*srch_inf
)
3326 struct smb2_query_directory_req
*req
;
3327 struct smb2_query_directory_rsp
*rsp
= NULL
;
3329 struct kvec rsp_iov
;
3332 int resp_buftype
= CIFS_NO_BUFFER
;
3333 unsigned char *bufptr
;
3334 struct TCP_Server_Info
*server
;
3335 struct cifs_ses
*ses
= tcon
->ses
;
3336 __le16 asteriks
= cpu_to_le16('*');
3338 unsigned int output_size
= CIFSMaxBufSize
;
3339 size_t info_buf_size
;
3341 unsigned int total_len
;
3343 if (ses
&& (ses
->server
))
3344 server
= ses
->server
;
3348 rc
= smb2_plain_req_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
,
3353 if (smb3_encryption_required(tcon
))
3354 flags
|= CIFS_TRANSFORM_REQ
;
3356 switch (srch_inf
->info_level
) {
3357 case SMB_FIND_FILE_DIRECTORY_INFO
:
3358 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
3359 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
3361 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
3362 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
3363 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
3366 cifs_dbg(VFS
, "info level %u isn't supported\n",
3367 srch_inf
->info_level
);
3372 req
->FileIndex
= cpu_to_le32(index
);
3373 req
->PersistentFileId
= persistent_fid
;
3374 req
->VolatileFileId
= volatile_fid
;
3377 bufptr
= req
->Buffer
;
3378 memcpy(bufptr
, &asteriks
, len
);
3380 req
->FileNameOffset
=
3381 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1);
3382 req
->FileNameLength
= cpu_to_le16(len
);
3384 * BB could be 30 bytes or so longer if we used SMB2 specific
3385 * buffer lengths, but this is safe and close enough.
3387 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
3388 output_size
= min_t(unsigned int, output_size
, 2 << 15);
3389 req
->OutputBufferLength
= cpu_to_le32(output_size
);
3391 iov
[0].iov_base
= (char *)req
;
3393 iov
[0].iov_len
= total_len
- 1;
3395 iov
[1].iov_base
= (char *)(req
->Buffer
);
3396 iov
[1].iov_len
= len
;
3398 rc
= smb2_send_recv(xid
, ses
, iov
, 2, &resp_buftype
, flags
, &rsp_iov
);
3399 cifs_small_buf_release(req
);
3400 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
.iov_base
;
3403 if (rc
== -ENODATA
&&
3404 rsp
->sync_hdr
.Status
== STATUS_NO_MORE_FILES
) {
3405 srch_inf
->endOfSearch
= true;
3408 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
3412 rc
= validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
3413 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
3418 srch_inf
->unicode
= true;
3420 if (srch_inf
->ntwrk_buf_start
) {
3421 if (srch_inf
->smallBuf
)
3422 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
3424 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
3426 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
3427 srch_inf
->srch_entries_start
= srch_inf
->last_entry
=
3428 (char *)rsp
+ le16_to_cpu(rsp
->OutputBufferOffset
);
3429 end_of_smb
= rsp_iov
.iov_len
+ (char *)rsp
;
3430 srch_inf
->entries_in_buffer
=
3431 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
3432 &srch_inf
->last_entry
, info_buf_size
);
3433 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
3434 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
3435 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
3436 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
3437 if (resp_buftype
== CIFS_LARGE_BUFFER
)
3438 srch_inf
->smallBuf
= false;
3439 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
3440 srch_inf
->smallBuf
= true;
3442 cifs_dbg(VFS
, "illegal search buffer type\n");
3447 free_rsp_buf(resp_buftype
, rsp
);
3452 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3453 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, u8 info_class
,
3454 u8 info_type
, u32 additional_info
, unsigned int num
,
3455 void **data
, unsigned int *size
)
3457 struct smb2_set_info_req
*req
;
3458 struct smb2_set_info_rsp
*rsp
= NULL
;
3460 struct kvec rsp_iov
;
3464 struct cifs_ses
*ses
= tcon
->ses
;
3466 unsigned int total_len
;
3468 if (!ses
|| !(ses
->server
))
3474 iov
= kmalloc_array(num
, sizeof(struct kvec
), GFP_KERNEL
);
3478 rc
= smb2_plain_req_init(SMB2_SET_INFO
, tcon
, (void **) &req
, &total_len
);
3484 if (smb3_encryption_required(tcon
))
3485 flags
|= CIFS_TRANSFORM_REQ
;
3487 req
->sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3489 req
->InfoType
= info_type
;
3490 req
->FileInfoClass
= info_class
;
3491 req
->PersistentFileId
= persistent_fid
;
3492 req
->VolatileFileId
= volatile_fid
;
3493 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
3496 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1);
3497 req
->BufferLength
= cpu_to_le32(*size
);
3499 memcpy(req
->Buffer
, *data
, *size
);
3502 iov
[0].iov_base
= (char *)req
;
3504 iov
[0].iov_len
= total_len
- 1;
3506 for (i
= 1; i
< num
; i
++) {
3507 le32_add_cpu(&req
->BufferLength
, size
[i
]);
3508 iov
[i
].iov_base
= (char *)data
[i
];
3509 iov
[i
].iov_len
= size
[i
];
3512 rc
= smb2_send_recv(xid
, ses
, iov
, num
, &resp_buftype
, flags
,
3514 cifs_small_buf_release(req
);
3515 rsp
= (struct smb2_set_info_rsp
*)rsp_iov
.iov_base
;
3518 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
3519 trace_smb3_set_info_err(xid
, persistent_fid
, tcon
->tid
,
3520 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
3523 free_rsp_buf(resp_buftype
, rsp
);
3529 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
3530 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3532 struct smb2_file_rename_info info
;
3534 unsigned int size
[2];
3536 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3538 data
= kmalloc_array(2, sizeof(void *), GFP_KERNEL
);
3542 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
3543 /* 0 = fail if target already exists */
3544 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3545 info
.FileNameLength
= cpu_to_le32(len
);
3548 size
[0] = sizeof(struct smb2_file_rename_info
);
3550 data
[1] = target_file
;
3551 size
[1] = len
+ 2 /* null */;
3553 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3554 current
->tgid
, FILE_RENAME_INFORMATION
, SMB2_O_INFO_FILE
,
3561 SMB2_rmdir(const unsigned int xid
, struct cifs_tcon
*tcon
,
3562 u64 persistent_fid
, u64 volatile_fid
)
3564 __u8 delete_pending
= 1;
3568 data
= &delete_pending
;
3569 size
= 1; /* sizeof __u8 */
3571 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3572 current
->tgid
, FILE_DISPOSITION_INFORMATION
, SMB2_O_INFO_FILE
,
3573 0, 1, &data
, &size
);
3577 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
3578 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3580 struct smb2_file_link_info info
;
3582 unsigned int size
[2];
3584 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3586 data
= kmalloc_array(2, sizeof(void *), GFP_KERNEL
);
3590 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
3591 /* 0 = fail if link already exists */
3592 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3593 info
.FileNameLength
= cpu_to_le32(len
);
3596 size
[0] = sizeof(struct smb2_file_link_info
);
3598 data
[1] = target_file
;
3599 size
[1] = len
+ 2 /* null */;
3601 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3602 current
->tgid
, FILE_LINK_INFORMATION
, SMB2_O_INFO_FILE
,
3609 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3610 u64 volatile_fid
, u32 pid
, __le64
*eof
, bool is_falloc
)
3612 struct smb2_file_eof_info info
;
3616 info
.EndOfFile
= *eof
;
3619 size
= sizeof(struct smb2_file_eof_info
);
3622 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3623 pid
, FILE_ALLOCATION_INFORMATION
, SMB2_O_INFO_FILE
,
3624 0, 1, &data
, &size
);
3626 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3627 pid
, FILE_END_OF_FILE_INFORMATION
, SMB2_O_INFO_FILE
,
3628 0, 1, &data
, &size
);
3632 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3633 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
3636 size
= sizeof(FILE_BASIC_INFO
);
3637 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3638 current
->tgid
, FILE_BASIC_INFORMATION
, SMB2_O_INFO_FILE
,
3639 0, 1, (void **)&buf
, &size
);
3643 SMB2_set_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
3644 u64 persistent_fid
, u64 volatile_fid
,
3645 struct cifs_ntsd
*pnntsd
, int pacllen
, int aclflag
)
3647 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3648 current
->tgid
, 0, SMB2_O_INFO_SECURITY
, aclflag
,
3649 1, (void **)&pnntsd
, &pacllen
);
3653 SMB2_set_ea(const unsigned int xid
, struct cifs_tcon
*tcon
,
3654 u64 persistent_fid
, u64 volatile_fid
,
3655 struct smb2_file_full_ea_info
*buf
, int len
)
3657 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3658 current
->tgid
, FILE_FULL_EA_INFORMATION
, SMB2_O_INFO_FILE
,
3659 0, 1, (void **)&buf
, &len
);
3663 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3664 const u64 persistent_fid
, const u64 volatile_fid
,
3668 struct smb2_oplock_break
*req
= NULL
;
3669 struct cifs_ses
*ses
= tcon
->ses
;
3670 int flags
= CIFS_OBREAK_OP
;
3671 unsigned int total_len
;
3673 struct kvec rsp_iov
;
3676 cifs_dbg(FYI
, "SMB2_oplock_break\n");
3677 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
,
3682 if (smb3_encryption_required(tcon
))
3683 flags
|= CIFS_TRANSFORM_REQ
;
3685 req
->VolatileFid
= volatile_fid
;
3686 req
->PersistentFid
= persistent_fid
;
3687 req
->OplockLevel
= oplock_level
;
3688 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
3690 flags
|= CIFS_NO_RESP
;
3692 iov
[0].iov_base
= (char *)req
;
3693 iov
[0].iov_len
= total_len
;
3695 rc
= smb2_send_recv(xid
, ses
, iov
, 1, &resp_buf_type
, flags
, &rsp_iov
);
3696 cifs_small_buf_release(req
);
3699 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3700 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
3707 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
3708 struct kstatfs
*kst
)
3710 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
3711 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
3712 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
3713 kst
->f_bfree
= kst
->f_bavail
=
3714 le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
3719 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
3720 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
3722 struct TCP_Server_Info
*server
;
3724 struct smb2_query_info_req
*req
;
3725 unsigned int total_len
;
3727 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
3729 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
3732 server
= tcon
->ses
->server
;
3734 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
,
3739 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
3740 req
->FileInfoClass
= level
;
3741 req
->PersistentFileId
= persistent_fid
;
3742 req
->VolatileFileId
= volatile_fid
;
3744 req
->InputBufferOffset
=
3745 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1);
3746 req
->OutputBufferLength
= cpu_to_le32(
3747 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1);
3749 iov
->iov_base
= (char *)req
;
3750 iov
->iov_len
= total_len
;
3755 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3756 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
3758 struct smb2_query_info_rsp
*rsp
= NULL
;
3760 struct kvec rsp_iov
;
3763 struct cifs_ses
*ses
= tcon
->ses
;
3764 struct smb2_fs_full_size_info
*info
= NULL
;
3767 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
3768 sizeof(struct smb2_fs_full_size_info
),
3769 persistent_fid
, volatile_fid
);
3773 if (smb3_encryption_required(tcon
))
3774 flags
|= CIFS_TRANSFORM_REQ
;
3776 rc
= smb2_send_recv(xid
, ses
, &iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
3777 cifs_small_buf_release(iov
.iov_base
);
3779 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3782 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3784 info
= (struct smb2_fs_full_size_info
*)(
3785 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
3786 rc
= validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
3787 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
3788 sizeof(struct smb2_fs_full_size_info
));
3790 copy_fs_info_to_kstatfs(info
, fsdata
);
3793 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3798 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
3799 u64 persistent_fid
, u64 volatile_fid
, int level
)
3801 struct smb2_query_info_rsp
*rsp
= NULL
;
3803 struct kvec rsp_iov
;
3805 int resp_buftype
, max_len
, min_len
;
3806 struct cifs_ses
*ses
= tcon
->ses
;
3807 unsigned int rsp_len
, offset
;
3810 if (level
== FS_DEVICE_INFORMATION
) {
3811 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3812 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
3813 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
3814 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
3815 min_len
= MIN_FS_ATTR_INFO_SIZE
;
3816 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3817 max_len
= sizeof(struct smb3_fs_ss_info
);
3818 min_len
= sizeof(struct smb3_fs_ss_info
);
3820 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
3824 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
3825 persistent_fid
, volatile_fid
);
3829 if (smb3_encryption_required(tcon
))
3830 flags
|= CIFS_TRANSFORM_REQ
;
3832 rc
= smb2_send_recv(xid
, ses
, &iov
, 1, &resp_buftype
, flags
, &rsp_iov
);
3833 cifs_small_buf_release(iov
.iov_base
);
3835 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3838 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3840 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
3841 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
3842 rc
= validate_iov(offset
, rsp_len
, &rsp_iov
, min_len
);
3846 if (level
== FS_ATTRIBUTE_INFORMATION
)
3847 memcpy(&tcon
->fsAttrInfo
, offset
3848 + (char *)rsp
, min_t(unsigned int,
3850 else if (level
== FS_DEVICE_INFORMATION
)
3851 memcpy(&tcon
->fsDevInfo
, offset
3852 + (char *)rsp
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
3853 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
3854 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
3855 (offset
+ (char *)rsp
);
3856 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
3857 tcon
->perf_sector_size
=
3858 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
3862 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3867 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
3868 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3869 const __u32 num_lock
, struct smb2_lock_element
*buf
)
3872 struct smb2_lock_req
*req
= NULL
;
3874 struct kvec rsp_iov
;
3877 int flags
= CIFS_NO_RESP
;
3878 unsigned int total_len
;
3880 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
3882 rc
= smb2_plain_req_init(SMB2_LOCK
, tcon
, (void **) &req
, &total_len
);
3886 if (smb3_encryption_required(tcon
))
3887 flags
|= CIFS_TRANSFORM_REQ
;
3889 req
->sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3890 req
->LockCount
= cpu_to_le16(num_lock
);
3892 req
->PersistentFileId
= persist_fid
;
3893 req
->VolatileFileId
= volatile_fid
;
3895 count
= num_lock
* sizeof(struct smb2_lock_element
);
3897 iov
[0].iov_base
= (char *)req
;
3898 iov
[0].iov_len
= total_len
- sizeof(struct smb2_lock_element
);
3899 iov
[1].iov_base
= (char *)buf
;
3900 iov
[1].iov_len
= count
;
3902 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
3903 rc
= smb2_send_recv(xid
, tcon
->ses
, iov
, 2, &resp_buf_type
, flags
,
3905 cifs_small_buf_release(req
);
3907 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
3908 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
3909 trace_smb3_lock_err(xid
, persist_fid
, tcon
->tid
,
3910 tcon
->ses
->Suid
, rc
);
3917 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
3918 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
3919 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
3922 struct smb2_lock_element lock
;
3924 lock
.Offset
= cpu_to_le64(offset
);
3925 lock
.Length
= cpu_to_le64(length
);
3926 lock
.Flags
= cpu_to_le32(lock_flags
);
3927 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
3928 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
3930 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
3934 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3935 __u8
*lease_key
, const __le32 lease_state
)
3938 struct smb2_lease_ack
*req
= NULL
;
3939 struct cifs_ses
*ses
= tcon
->ses
;
3940 int flags
= CIFS_OBREAK_OP
;
3941 unsigned int total_len
;
3943 struct kvec rsp_iov
;
3946 cifs_dbg(FYI
, "SMB2_lease_break\n");
3947 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
,
3952 if (smb3_encryption_required(tcon
))
3953 flags
|= CIFS_TRANSFORM_REQ
;
3955 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
3956 req
->StructureSize
= cpu_to_le16(36);
3959 memcpy(req
->LeaseKey
, lease_key
, 16);
3960 req
->LeaseState
= lease_state
;
3962 flags
|= CIFS_NO_RESP
;
3964 iov
[0].iov_base
= (char *)req
;
3965 iov
[0].iov_len
= total_len
;
3967 rc
= smb2_send_recv(xid
, ses
, iov
, 1, &resp_buf_type
, flags
, &rsp_iov
);
3968 cifs_small_buf_release(req
);
3971 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3972 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);