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 rc
= wait_event_interruptible_timeout(server
->response_q
,
216 (server
->tcpStatus
!= CifsNeedReconnect
),
219 cifs_dbg(FYI
, "%s: aborting reconnect due to a received"
220 " signal by the process\n", __func__
);
224 /* are we still trying to reconnect? */
225 if (server
->tcpStatus
!= CifsNeedReconnect
)
229 * on "soft" mounts we wait once. Hard mounts keep
230 * retrying until process is killed or server comes
234 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
239 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
242 nls_codepage
= load_nls_default();
245 * need to prevent multiple threads trying to simultaneously reconnect
246 * the same SMB session
248 mutex_lock(&tcon
->ses
->session_mutex
);
251 * Recheck after acquire mutex. If another thread is negotiating
252 * and the server never sends an answer the socket will be closed
253 * and tcpStatus set to reconnect.
255 if (server
->tcpStatus
== CifsNeedReconnect
) {
257 mutex_unlock(&tcon
->ses
->session_mutex
);
261 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
262 if (!rc
&& tcon
->ses
->need_reconnect
)
263 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
265 if (rc
|| !tcon
->need_reconnect
) {
266 mutex_unlock(&tcon
->ses
->session_mutex
);
270 cifs_mark_open_files_invalid(tcon
);
271 if (tcon
->use_persistent
)
272 tcon
->need_reopen_files
= true;
274 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
275 mutex_unlock(&tcon
->ses
->session_mutex
);
277 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
279 /* If sess reconnected but tcon didn't, something strange ... */
280 printk_once(KERN_WARNING
"reconnect tcon failed rc = %d\n", rc
);
284 if (smb2_command
!= SMB2_INTERNAL_CMD
)
285 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
287 atomic_inc(&tconInfoReconnectCount
);
290 * Check if handle based operation so we know whether we can continue
291 * or not without returning to caller to reset file handle.
294 * BB Is flush done by server on drop of tcp session? Should we special
295 * case it and skip above?
297 switch (smb2_command
) {
303 case SMB2_QUERY_DIRECTORY
:
304 case SMB2_CHANGE_NOTIFY
:
305 case SMB2_QUERY_INFO
:
309 unload_nls(nls_codepage
);
314 fill_small_buf(__le16 smb2_command
, struct cifs_tcon
*tcon
, void *buf
,
315 unsigned int *total_len
)
317 struct smb2_sync_pdu
*spdu
= (struct smb2_sync_pdu
*)buf
;
318 /* lookup word count ie StructureSize from table */
319 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_command
)];
322 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
323 * largest operations (Create)
327 smb2_hdr_assemble(&spdu
->sync_hdr
, smb2_command
, tcon
);
328 spdu
->StructureSize2
= cpu_to_le16(parmsize
);
330 *total_len
= parmsize
+ sizeof(struct smb2_sync_hdr
);
334 * Allocate and return pointer to an SMB request hdr, and set basic
335 * SMB information in the SMB header. If the return code is zero, this
336 * function must have filled in request_buf pointer.
339 smb2_plain_req_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
340 void **request_buf
, unsigned int *total_len
)
344 rc
= smb2_reconnect(smb2_command
, tcon
);
348 /* BB eventually switch this to SMB2 specific small buf size */
349 if (smb2_command
== SMB2_SET_INFO
)
350 *request_buf
= cifs_buf_get();
352 *request_buf
= cifs_small_buf_get();
353 if (*request_buf
== NULL
) {
354 /* BB should we add a retry in here if not a writepage? */
358 fill_small_buf(smb2_command
, tcon
,
359 (struct smb2_sync_hdr
*)(*request_buf
),
363 #ifdef CONFIG_CIFS_STATS2
364 uint16_t com_code
= le16_to_cpu(smb2_command
);
365 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
367 cifs_stats_inc(&tcon
->num_smbs_sent
);
373 #ifdef CONFIG_CIFS_SMB311
374 /* offset is sizeof smb2_negotiate_req but rounded up to 8 bytes */
375 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) */
378 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
379 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
380 #define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100)
383 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
385 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
386 pneg_ctxt
->DataLength
= cpu_to_le16(38);
387 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
388 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
389 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
390 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
394 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
396 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
397 pneg_ctxt
->DataLength
= cpu_to_le16(4); /* Cipher Count + le16 cipher */
398 pneg_ctxt
->CipherCount
= cpu_to_le16(1);
399 /* pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;*/ /* not supported yet */
400 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_CCM
;
404 build_posix_ctxt(struct smb2_posix_neg_context
*pneg_ctxt
)
406 pneg_ctxt
->ContextType
= SMB2_POSIX_EXTENSIONS_AVAILABLE
;
407 pneg_ctxt
->DataLength
= cpu_to_le16(POSIX_CTXT_DATA_LEN
);
411 assemble_neg_contexts(struct smb2_negotiate_req
*req
,
412 unsigned int *total_len
)
414 char *pneg_ctxt
= (char *)req
+ OFFSET_OF_NEG_CONTEXT
;
415 unsigned int ctxt_len
;
417 *total_len
+= 2; /* Add 2 due to round to 8 byte boundary for 1st ctxt */
418 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
419 ctxt_len
= DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context
), 8) * 8;
420 *total_len
+= ctxt_len
;
421 pneg_ctxt
+= ctxt_len
;
423 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
424 ctxt_len
= DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context
), 8) * 8;
425 *total_len
+= ctxt_len
;
426 pneg_ctxt
+= ctxt_len
;
428 build_posix_ctxt((struct smb2_posix_neg_context
*)pneg_ctxt
);
429 *total_len
+= sizeof(struct smb2_posix_neg_context
);
431 req
->NegotiateContextOffset
= cpu_to_le32(OFFSET_OF_NEG_CONTEXT
);
432 req
->NegotiateContextCount
= cpu_to_le16(3);
435 static void decode_preauth_context(struct smb2_preauth_neg_context
*ctxt
)
437 unsigned int len
= le16_to_cpu(ctxt
->DataLength
);
439 /* If invalid preauth context warn but use what we requested, SHA-512 */
440 if (len
< MIN_PREAUTH_CTXT_DATA_LEN
) {
441 printk_once(KERN_WARNING
"server sent bad preauth context\n");
444 if (le16_to_cpu(ctxt
->HashAlgorithmCount
) != 1)
445 printk_once(KERN_WARNING
"illegal SMB3 hash algorithm count\n");
446 if (ctxt
->HashAlgorithms
!= SMB2_PREAUTH_INTEGRITY_SHA512
)
447 printk_once(KERN_WARNING
"unknown SMB3 hash algorithm\n");
450 static int decode_encrypt_ctx(struct TCP_Server_Info
*server
,
451 struct smb2_encryption_neg_context
*ctxt
)
453 unsigned int len
= le16_to_cpu(ctxt
->DataLength
);
455 cifs_dbg(FYI
, "decode SMB3.11 encryption neg context of len %d\n", len
);
456 if (len
< MIN_ENCRYPT_CTXT_DATA_LEN
) {
457 printk_once(KERN_WARNING
"server sent bad crypto ctxt len\n");
461 if (le16_to_cpu(ctxt
->CipherCount
) != 1) {
462 printk_once(KERN_WARNING
"illegal SMB3.11 cipher count\n");
465 cifs_dbg(FYI
, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt
->Ciphers
[0]));
466 if ((ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES128_CCM
) &&
467 (ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES128_GCM
)) {
468 printk_once(KERN_WARNING
"invalid SMB3.11 cipher returned\n");
471 server
->cipher_type
= ctxt
->Ciphers
[0];
472 server
->capabilities
|= SMB2_GLOBAL_CAP_ENCRYPTION
;
476 static int smb311_decode_neg_context(struct smb2_negotiate_rsp
*rsp
,
477 struct TCP_Server_Info
*server
,
478 unsigned int len_of_smb
)
480 struct smb2_neg_context
*pctx
;
481 unsigned int offset
= le32_to_cpu(rsp
->NegotiateContextOffset
);
482 unsigned int ctxt_cnt
= le16_to_cpu(rsp
->NegotiateContextCount
);
483 unsigned int len_of_ctxts
, i
;
486 cifs_dbg(FYI
, "decoding %d negotiate contexts\n", ctxt_cnt
);
487 if (len_of_smb
<= offset
) {
488 cifs_dbg(VFS
, "Invalid response: negotiate context offset\n");
492 len_of_ctxts
= len_of_smb
- offset
;
494 for (i
= 0; i
< ctxt_cnt
; i
++) {
496 /* check that offset is not beyond end of SMB */
497 if (len_of_ctxts
== 0)
500 if (len_of_ctxts
< sizeof(struct smb2_neg_context
))
503 pctx
= (struct smb2_neg_context
*)(offset
+ (char *)rsp
);
504 clen
= le16_to_cpu(pctx
->DataLength
);
505 if (clen
> len_of_ctxts
)
508 if (pctx
->ContextType
== SMB2_PREAUTH_INTEGRITY_CAPABILITIES
)
509 decode_preauth_context(
510 (struct smb2_preauth_neg_context
*)pctx
);
511 else if (pctx
->ContextType
== SMB2_ENCRYPTION_CAPABILITIES
)
512 rc
= decode_encrypt_ctx(server
,
513 (struct smb2_encryption_neg_context
*)pctx
);
514 else if (pctx
->ContextType
== SMB2_POSIX_EXTENSIONS_AVAILABLE
)
515 server
->posix_ext_supported
= true;
517 cifs_dbg(VFS
, "unknown negcontext of type %d ignored\n",
518 le16_to_cpu(pctx
->ContextType
));
522 /* offsets must be 8 byte aligned */
523 clen
= (clen
+ 7) & ~0x7;
524 offset
+= clen
+ sizeof(struct smb2_neg_context
);
525 len_of_ctxts
-= clen
;
530 static struct create_posix
*
531 create_posix_buf(umode_t mode
)
533 struct create_posix
*buf
;
535 buf
= kzalloc(sizeof(struct create_posix
),
540 buf
->ccontext
.DataOffset
=
541 cpu_to_le16(offsetof(struct create_posix
, Mode
));
542 buf
->ccontext
.DataLength
= cpu_to_le32(4);
543 buf
->ccontext
.NameOffset
=
544 cpu_to_le16(offsetof(struct create_posix
, Name
));
545 buf
->ccontext
.NameLength
= cpu_to_le16(16);
547 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
558 buf
->Name
[10] = 0x83;
559 buf
->Name
[11] = 0xDE;
560 buf
->Name
[12] = 0x96;
561 buf
->Name
[13] = 0x8B;
562 buf
->Name
[14] = 0xCD;
563 buf
->Name
[15] = 0x7C;
564 buf
->Mode
= cpu_to_le32(mode
);
565 cifs_dbg(FYI
, "mode on posix create 0%o", mode
);
570 add_posix_context(struct kvec
*iov
, unsigned int *num_iovec
, umode_t mode
)
572 struct smb2_create_req
*req
= iov
[0].iov_base
;
573 unsigned int num
= *num_iovec
;
575 iov
[num
].iov_base
= create_posix_buf(mode
);
576 if (iov
[num
].iov_base
== NULL
)
578 iov
[num
].iov_len
= sizeof(struct create_posix
);
579 if (!req
->CreateContextsOffset
)
580 req
->CreateContextsOffset
= cpu_to_le32(
581 sizeof(struct smb2_create_req
) +
582 iov
[num
- 1].iov_len
);
583 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_posix
));
584 *num_iovec
= num
+ 1;
589 static void assemble_neg_contexts(struct smb2_negotiate_req
*req
,
590 unsigned int *total_len
)
598 * SMB2 Worker functions follow:
600 * The general structure of the worker functions is:
601 * 1) Call smb2_init (assembles SMB2 header)
602 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
603 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
604 * 4) Decode SMB2 command specific fields in the fixed length area
605 * 5) Decode variable length data area (if any for this SMB2 command type)
606 * 6) Call free smb buffer
612 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
614 struct smb_rqst rqst
;
615 struct smb2_negotiate_req
*req
;
616 struct smb2_negotiate_rsp
*rsp
;
621 struct TCP_Server_Info
*server
= ses
->server
;
622 int blob_offset
, blob_length
;
624 int flags
= CIFS_NEG_OP
;
625 unsigned int total_len
;
627 cifs_dbg(FYI
, "Negotiate protocol\n");
630 WARN(1, "%s: server is NULL!\n", __func__
);
634 rc
= smb2_plain_req_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
, &total_len
);
638 req
->sync_hdr
.SessionId
= 0;
639 #ifdef CONFIG_CIFS_SMB311
640 memset(server
->preauth_sha_hash
, 0, SMB2_PREAUTH_HASH_SIZE
);
641 memset(ses
->preauth_sha_hash
, 0, SMB2_PREAUTH_HASH_SIZE
);
644 if (strcmp(ses
->server
->vals
->version_string
,
645 SMB3ANY_VERSION_STRING
) == 0) {
646 req
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
647 req
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
648 req
->DialectCount
= cpu_to_le16(2);
650 } else if (strcmp(ses
->server
->vals
->version_string
,
651 SMBDEFAULT_VERSION_STRING
) == 0) {
652 req
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
653 req
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
654 req
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
655 req
->DialectCount
= cpu_to_le16(3);
658 /* otherwise send specific dialect */
659 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
660 req
->DialectCount
= cpu_to_le16(1);
664 /* only one of SMB2 signing flags may be set in SMB2 request */
666 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
667 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
668 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
670 req
->SecurityMode
= 0;
672 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
674 /* ClientGUID must be zero for SMB2.02 dialect */
675 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
676 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
678 memcpy(req
->ClientGUID
, server
->client_guid
,
679 SMB2_CLIENT_GUID_SIZE
);
680 if (ses
->server
->vals
->protocol_id
== SMB311_PROT_ID
)
681 assemble_neg_contexts(req
, &total_len
);
683 iov
[0].iov_base
= (char *)req
;
684 iov
[0].iov_len
= total_len
;
686 memset(&rqst
, 0, sizeof(struct smb_rqst
));
690 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
691 cifs_small_buf_release(req
);
692 rsp
= (struct smb2_negotiate_rsp
*)rsp_iov
.iov_base
;
694 * No tcon so can't do
695 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
697 if (rc
== -EOPNOTSUPP
) {
698 cifs_dbg(VFS
, "Dialect not supported by server. Consider "
699 "specifying vers=1.0 or vers=2.0 on mount for accessing"
705 if (strcmp(ses
->server
->vals
->version_string
,
706 SMB3ANY_VERSION_STRING
) == 0) {
707 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
709 "SMB2 dialect returned but not requested\n");
711 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
713 "SMB2.1 dialect returned but not requested\n");
716 } else if (strcmp(ses
->server
->vals
->version_string
,
717 SMBDEFAULT_VERSION_STRING
) == 0) {
718 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
720 "SMB2 dialect returned but not requested\n");
722 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
723 /* ops set to 3.0 by default for default so update */
724 ses
->server
->ops
= &smb21_operations
;
726 } else if (le16_to_cpu(rsp
->DialectRevision
) !=
727 ses
->server
->vals
->protocol_id
) {
728 /* if requested single dialect ensure returned dialect matched */
729 cifs_dbg(VFS
, "Illegal 0x%x dialect returned: not requested\n",
730 le16_to_cpu(rsp
->DialectRevision
));
734 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
736 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
737 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
738 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
739 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
740 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
741 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
742 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
743 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
744 #ifdef CONFIG_CIFS_SMB311
745 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
746 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
749 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
750 le16_to_cpu(rsp
->DialectRevision
));
754 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
756 /* BB: add check that dialect was valid given dialect(s) we asked for */
758 #ifdef CONFIG_CIFS_SMB311
760 * Keep a copy of the hash after negprot. This hash will be
761 * the starting hash value for all sessions made from this
764 memcpy(server
->preauth_sha_hash
, ses
->preauth_sha_hash
,
765 SMB2_PREAUTH_HASH_SIZE
);
767 /* SMB2 only has an extended negflavor */
768 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
769 /* set it to the maximum buffer size value we can send with 1 credit */
770 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
771 SMB2_MAX_BUFFER_SIZE
);
772 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
773 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
774 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
775 if ((server
->sec_mode
& SMB2_SEC_MODE_FLAGS_ALL
) != server
->sec_mode
)
776 cifs_dbg(FYI
, "Server returned unexpected security mode 0x%x\n",
778 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
780 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
782 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
783 (struct smb2_sync_hdr
*)rsp
);
785 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
787 * ses->sectype = RawNTLMSSP;
788 * but for time being this is our only auth choice so doesn't matter.
789 * We just found a server which sets blob length to zero expecting raw.
791 if (blob_length
== 0) {
792 cifs_dbg(FYI
, "missing security blob on negprot\n");
793 server
->sec_ntlmssp
= true;
796 rc
= cifs_enable_signing(server
, ses
->sign
);
800 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
807 #ifdef CONFIG_CIFS_SMB311
808 if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
)) {
809 if (rsp
->NegotiateContextCount
)
810 rc
= smb311_decode_neg_context(rsp
, server
,
813 cifs_dbg(VFS
, "Missing expected negotiate contexts\n");
815 #endif /* CONFIG_CIFS_SMB311 */
817 free_rsp_buf(resp_buftype
, rsp
);
821 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
824 struct validate_negotiate_info_req
*pneg_inbuf
;
825 struct validate_negotiate_info_rsp
*pneg_rsp
= NULL
;
827 u32 inbuflen
; /* max of 4 dialects */
829 cifs_dbg(FYI
, "validate negotiate\n");
831 /* In SMB3.11 preauth integrity supersedes validate negotiate */
832 if (tcon
->ses
->server
->dialect
== SMB311_PROT_ID
)
836 * validation ioctl must be signed, so no point sending this if we
837 * can not sign it (ie are not known user). Even if signing is not
838 * required (enabled but not negotiated), in those cases we selectively
839 * sign just this, the first and only signed request on a connection.
840 * Having validation of negotiate info helps reduce attack vectors.
842 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
)
843 return 0; /* validation requires signing */
845 if (tcon
->ses
->user_name
== NULL
) {
846 cifs_dbg(FYI
, "Can't validate negotiate: null user mount\n");
847 return 0; /* validation requires signing */
850 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_NULL
)
851 cifs_dbg(VFS
, "Unexpected null user (anonymous) auth flag sent by server\n");
853 pneg_inbuf
= kmalloc(sizeof(*pneg_inbuf
), GFP_NOFS
);
857 pneg_inbuf
->Capabilities
=
858 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
859 memcpy(pneg_inbuf
->Guid
, tcon
->ses
->server
->client_guid
,
860 SMB2_CLIENT_GUID_SIZE
);
863 pneg_inbuf
->SecurityMode
=
864 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
865 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
866 pneg_inbuf
->SecurityMode
=
867 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
869 pneg_inbuf
->SecurityMode
= 0;
872 if (strcmp(tcon
->ses
->server
->vals
->version_string
,
873 SMB3ANY_VERSION_STRING
) == 0) {
874 pneg_inbuf
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
875 pneg_inbuf
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
876 pneg_inbuf
->DialectCount
= cpu_to_le16(2);
877 /* structure is big enough for 3 dialects, sending only 2 */
878 inbuflen
= sizeof(*pneg_inbuf
) -
879 sizeof(pneg_inbuf
->Dialects
[0]);
880 } else if (strcmp(tcon
->ses
->server
->vals
->version_string
,
881 SMBDEFAULT_VERSION_STRING
) == 0) {
882 pneg_inbuf
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
883 pneg_inbuf
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
884 pneg_inbuf
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
885 pneg_inbuf
->DialectCount
= cpu_to_le16(3);
886 /* structure is big enough for 3 dialects */
887 inbuflen
= sizeof(*pneg_inbuf
);
889 /* otherwise specific dialect was requested */
890 pneg_inbuf
->Dialects
[0] =
891 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
892 pneg_inbuf
->DialectCount
= cpu_to_le16(1);
893 /* structure is big enough for 3 dialects, sending only 1 */
894 inbuflen
= sizeof(*pneg_inbuf
) -
895 sizeof(pneg_inbuf
->Dialects
[0]) * 2;
898 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
899 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
900 (char *)pneg_inbuf
, inbuflen
, (char **)&pneg_rsp
, &rsplen
);
903 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
909 if (rsplen
!= sizeof(*pneg_rsp
)) {
910 cifs_dbg(VFS
, "invalid protocol negotiate response size: %d\n",
913 /* relax check since Mac returns max bufsize allowed on ioctl */
914 if (rsplen
> CIFSMaxBufSize
|| rsplen
< sizeof(*pneg_rsp
))
918 /* check validate negotiate info response matches what we got earlier */
919 if (pneg_rsp
->Dialect
!= cpu_to_le16(tcon
->ses
->server
->dialect
))
922 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
925 /* do not validate server guid because not saved at negprot time yet */
927 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
928 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
931 /* validate negotiate successful */
933 cifs_dbg(FYI
, "validate negotiate info successful\n");
937 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
946 smb2_select_sectype(struct TCP_Server_Info
*server
, enum securityEnum requested
)
955 if (server
->sec_ntlmssp
&&
956 (global_secflags
& CIFSSEC_MAY_NTLMSSP
))
958 if ((server
->sec_kerberos
|| server
->sec_mskerberos
) &&
959 (global_secflags
& CIFSSEC_MAY_KRB5
))
967 struct SMB2_sess_data
{
969 struct cifs_ses
*ses
;
970 struct nls_table
*nls_cp
;
971 void (*func
)(struct SMB2_sess_data
*);
973 u64 previous_session
;
975 /* we will send the SMB in three pieces:
976 * a fixed length beginning part, an optional
977 * SPNEGO blob (which can be zero length), and a
978 * last part which will include the strings
979 * and rest of bcc area. This allows us to avoid
980 * a large buffer 17K allocation
987 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
990 struct cifs_ses
*ses
= sess_data
->ses
;
991 struct smb2_sess_setup_req
*req
;
992 struct TCP_Server_Info
*server
= ses
->server
;
993 unsigned int total_len
;
995 rc
= smb2_plain_req_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
,
1000 /* First session, not a reauthenticate */
1001 req
->sync_hdr
.SessionId
= 0;
1003 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
1004 req
->PreviousSessionId
= sess_data
->previous_session
;
1006 req
->Flags
= 0; /* MBZ */
1008 /* enough to enable echos and oplocks and one max size write */
1009 req
->sync_hdr
.CreditRequest
= cpu_to_le16(130);
1011 /* only one of SMB2 signing flags may be set in SMB2 request */
1013 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
1014 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
1015 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
1017 req
->SecurityMode
= 0;
1019 req
->Capabilities
= 0;
1020 req
->Channel
= 0; /* MBZ */
1022 sess_data
->iov
[0].iov_base
= (char *)req
;
1024 sess_data
->iov
[0].iov_len
= total_len
- 1;
1026 * This variable will be used to clear the buffer
1027 * allocated above in case of any error in the calling function.
1029 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
1035 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
1037 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
1038 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1042 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
1045 struct smb_rqst rqst
;
1046 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
1047 struct kvec rsp_iov
= { NULL
, 0 };
1049 /* Testing shows that buffer offset must be at location of Buffer[0] */
1050 req
->SecurityBufferOffset
=
1051 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) - 1 /* pad */);
1052 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
1054 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1055 rqst
.rq_iov
= sess_data
->iov
;
1058 /* BB add code to build os and lm fields */
1059 rc
= cifs_send_recv(sess_data
->xid
, sess_data
->ses
,
1061 &sess_data
->buf0_type
,
1062 CIFS_LOG_ERROR
| CIFS_NEG_OP
, &rsp_iov
);
1063 cifs_small_buf_release(sess_data
->iov
[0].iov_base
);
1064 memcpy(&sess_data
->iov
[0], &rsp_iov
, sizeof(struct kvec
));
1070 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
1073 struct cifs_ses
*ses
= sess_data
->ses
;
1075 mutex_lock(&ses
->server
->srv_mutex
);
1076 if (ses
->server
->ops
->generate_signingkey
) {
1077 rc
= ses
->server
->ops
->generate_signingkey(ses
);
1080 "SMB3 session key generation failed\n");
1081 mutex_unlock(&ses
->server
->srv_mutex
);
1085 if (!ses
->server
->session_estab
) {
1086 ses
->server
->sequence_number
= 0x2;
1087 ses
->server
->session_estab
= true;
1089 mutex_unlock(&ses
->server
->srv_mutex
);
1091 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
1092 spin_lock(&GlobalMid_Lock
);
1093 ses
->status
= CifsGood
;
1094 ses
->need_reconnect
= false;
1095 spin_unlock(&GlobalMid_Lock
);
1099 #ifdef CONFIG_CIFS_UPCALL
1101 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1104 struct cifs_ses
*ses
= sess_data
->ses
;
1105 struct cifs_spnego_msg
*msg
;
1106 struct key
*spnego_key
= NULL
;
1107 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1109 rc
= SMB2_sess_alloc_buffer(sess_data
);
1113 spnego_key
= cifs_get_spnego_key(ses
);
1114 if (IS_ERR(spnego_key
)) {
1115 rc
= PTR_ERR(spnego_key
);
1120 msg
= spnego_key
->payload
.data
[0];
1122 * check version field to make sure that cifs.upcall is
1123 * sending us a response in an expected form
1125 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
1127 "bad cifs.upcall version. Expected %d got %d",
1128 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
1130 goto out_put_spnego_key
;
1133 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
1135 if (!ses
->auth_key
.response
) {
1137 "Kerberos can't allocate (%u bytes) memory",
1140 goto out_put_spnego_key
;
1142 ses
->auth_key
.len
= msg
->sesskey_len
;
1144 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
1145 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
1147 rc
= SMB2_sess_sendreceive(sess_data
);
1149 goto out_put_spnego_key
;
1151 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1152 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1154 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1156 rc
= SMB2_sess_establish_session(sess_data
);
1158 key_invalidate(spnego_key
);
1159 key_put(spnego_key
);
1161 sess_data
->result
= rc
;
1162 sess_data
->func
= NULL
;
1163 SMB2_sess_free_buffer(sess_data
);
1167 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1169 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
1170 sess_data
->result
= -EOPNOTSUPP
;
1171 sess_data
->func
= NULL
;
1176 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
1179 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
1182 struct cifs_ses
*ses
= sess_data
->ses
;
1183 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1184 char *ntlmssp_blob
= NULL
;
1185 bool use_spnego
= false; /* else use raw ntlmssp */
1186 u16 blob_length
= 0;
1189 * If memory allocation is successful, caller of this function
1192 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
1193 if (!ses
->ntlmssp
) {
1197 ses
->ntlmssp
->sesskey_per_smbsess
= true;
1199 rc
= SMB2_sess_alloc_buffer(sess_data
);
1203 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
1205 if (ntlmssp_blob
== NULL
) {
1210 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
1212 /* BB eventually need to add this */
1213 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1217 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
1218 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1220 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1221 sess_data
->iov
[1].iov_len
= blob_length
;
1223 rc
= SMB2_sess_sendreceive(sess_data
);
1224 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1226 /* If true, rc here is expected and not an error */
1227 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
1228 rsp
->sync_hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
1234 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) !=
1235 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
1236 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
1237 le16_to_cpu(rsp
->SecurityBufferOffset
));
1241 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
1242 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
1246 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
1249 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1250 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1253 kfree(ntlmssp_blob
);
1254 SMB2_sess_free_buffer(sess_data
);
1256 sess_data
->result
= 0;
1257 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
1261 kfree(ses
->ntlmssp
);
1262 ses
->ntlmssp
= NULL
;
1263 sess_data
->result
= rc
;
1264 sess_data
->func
= NULL
;
1268 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
1271 struct cifs_ses
*ses
= sess_data
->ses
;
1272 struct smb2_sess_setup_req
*req
;
1273 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1274 unsigned char *ntlmssp_blob
= NULL
;
1275 bool use_spnego
= false; /* else use raw ntlmssp */
1276 u16 blob_length
= 0;
1278 rc
= SMB2_sess_alloc_buffer(sess_data
);
1282 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
1283 req
->sync_hdr
.SessionId
= ses
->Suid
;
1285 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
, ses
,
1288 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
1293 /* BB eventually need to add this */
1294 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1298 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1299 sess_data
->iov
[1].iov_len
= blob_length
;
1301 rc
= SMB2_sess_sendreceive(sess_data
);
1305 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1307 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1308 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1310 rc
= SMB2_sess_establish_session(sess_data
);
1312 kfree(ntlmssp_blob
);
1313 SMB2_sess_free_buffer(sess_data
);
1314 kfree(ses
->ntlmssp
);
1315 ses
->ntlmssp
= NULL
;
1316 sess_data
->result
= rc
;
1317 sess_data
->func
= NULL
;
1321 SMB2_select_sec(struct cifs_ses
*ses
, struct SMB2_sess_data
*sess_data
)
1325 type
= smb2_select_sectype(ses
->server
, ses
->sectype
);
1326 cifs_dbg(FYI
, "sess setup type %d\n", type
);
1327 if (type
== Unspecified
) {
1329 "Unable to select appropriate authentication method!");
1335 sess_data
->func
= SMB2_auth_kerberos
;
1338 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
1341 cifs_dbg(VFS
, "secType %d not supported!\n", type
);
1349 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
1350 const struct nls_table
*nls_cp
)
1353 struct TCP_Server_Info
*server
= ses
->server
;
1354 struct SMB2_sess_data
*sess_data
;
1356 cifs_dbg(FYI
, "Session Setup\n");
1359 WARN(1, "%s: server is NULL!\n", __func__
);
1363 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
1367 rc
= SMB2_select_sec(ses
, sess_data
);
1370 sess_data
->xid
= xid
;
1371 sess_data
->ses
= ses
;
1372 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1373 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1374 sess_data
->previous_session
= ses
->Suid
;
1376 #ifdef CONFIG_CIFS_SMB311
1378 * Initialize the session hash with the server one.
1380 memcpy(ses
->preauth_sha_hash
, ses
->server
->preauth_sha_hash
,
1381 SMB2_PREAUTH_HASH_SIZE
);
1384 while (sess_data
->func
)
1385 sess_data
->func(sess_data
);
1387 if ((ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
) && (ses
->sign
))
1388 cifs_dbg(VFS
, "signing requested but authenticated as guest\n");
1389 rc
= sess_data
->result
;
1396 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1398 struct smb_rqst rqst
;
1399 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1401 struct TCP_Server_Info
*server
;
1403 unsigned int total_len
;
1405 struct kvec rsp_iov
;
1408 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1410 if (ses
&& (ses
->server
))
1411 server
= ses
->server
;
1415 /* no need to send SMB logoff if uid already closed due to reconnect */
1416 if (ses
->need_reconnect
)
1417 goto smb2_session_already_dead
;
1419 rc
= smb2_plain_req_init(SMB2_LOGOFF
, NULL
, (void **) &req
, &total_len
);
1423 /* since no tcon, smb2_init can not do this, so do here */
1424 req
->sync_hdr
.SessionId
= ses
->Suid
;
1426 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
1427 flags
|= CIFS_TRANSFORM_REQ
;
1428 else if (server
->sign
)
1429 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1431 flags
|= CIFS_NO_RESP
;
1433 iov
[0].iov_base
= (char *)req
;
1434 iov
[0].iov_len
= total_len
;
1436 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1440 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
1441 cifs_small_buf_release(req
);
1443 * No tcon so can't do
1444 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1447 smb2_session_already_dead
:
1451 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1453 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1456 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1458 /* These are similar values to what Windows uses */
1459 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1461 tcon
->max_chunks
= 256;
1462 tcon
->max_bytes_chunk
= 1048576;
1463 tcon
->max_bytes_copy
= 16777216;
1467 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1468 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1470 struct smb_rqst rqst
;
1471 struct smb2_tree_connect_req
*req
;
1472 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1474 struct kvec rsp_iov
= { NULL
, 0 };
1478 __le16
*unc_path
= NULL
;
1480 unsigned int total_len
;
1482 cifs_dbg(FYI
, "TCON\n");
1484 if (!(ses
->server
) || !tree
)
1487 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1488 if (unc_path
== NULL
)
1491 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1493 if (unc_path_len
< 2) {
1498 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1501 rc
= smb2_plain_req_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
,
1508 if (smb3_encryption_required(tcon
))
1509 flags
|= CIFS_TRANSFORM_REQ
;
1511 iov
[0].iov_base
= (char *)req
;
1513 iov
[0].iov_len
= total_len
- 1;
1515 /* Testing shows that buffer offset must be at location of Buffer[0] */
1516 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1518 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1519 iov
[1].iov_base
= unc_path
;
1520 iov
[1].iov_len
= unc_path_len
;
1522 /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
1523 if ((ses
->server
->dialect
== SMB311_PROT_ID
) &&
1524 !smb3_encryption_required(tcon
))
1525 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1527 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1531 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
1532 cifs_small_buf_release(req
);
1533 rsp
= (struct smb2_tree_connect_rsp
*)rsp_iov
.iov_base
;
1537 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1538 tcon
->need_reconnect
= true;
1540 goto tcon_error_exit
;
1543 switch (rsp
->ShareType
) {
1544 case SMB2_SHARE_TYPE_DISK
:
1545 cifs_dbg(FYI
, "connection to disk share\n");
1547 case SMB2_SHARE_TYPE_PIPE
:
1549 cifs_dbg(FYI
, "connection to pipe share\n");
1551 case SMB2_SHARE_TYPE_PRINT
:
1553 cifs_dbg(FYI
, "connection to printer\n");
1556 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1558 goto tcon_error_exit
;
1561 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1562 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1563 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1564 tcon
->tidStatus
= CifsGood
;
1565 tcon
->need_reconnect
= false;
1566 tcon
->tid
= rsp
->sync_hdr
.TreeId
;
1567 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1569 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1570 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1571 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1574 !(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
1575 cifs_dbg(VFS
, "Encryption is requested but not supported\n");
1577 init_copy_chunk_defaults(tcon
);
1578 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1579 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1581 free_rsp_buf(resp_buftype
, rsp
);
1586 if (rsp
&& rsp
->sync_hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1587 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1593 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1595 struct smb_rqst rqst
;
1596 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1598 struct cifs_ses
*ses
= tcon
->ses
;
1600 unsigned int total_len
;
1602 struct kvec rsp_iov
;
1605 cifs_dbg(FYI
, "Tree Disconnect\n");
1607 if (!ses
|| !(ses
->server
))
1610 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1613 rc
= smb2_plain_req_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
,
1618 if (smb3_encryption_required(tcon
))
1619 flags
|= CIFS_TRANSFORM_REQ
;
1621 flags
|= CIFS_NO_RESP
;
1623 iov
[0].iov_base
= (char *)req
;
1624 iov
[0].iov_len
= total_len
;
1626 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1630 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
1631 cifs_small_buf_release(req
);
1633 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1639 static struct create_durable
*
1640 create_durable_buf(void)
1642 struct create_durable
*buf
;
1644 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1648 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1649 (struct create_durable
, Data
));
1650 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1651 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1652 (struct create_durable
, Name
));
1653 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1654 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1662 static struct create_durable
*
1663 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1665 struct create_durable
*buf
;
1667 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1671 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1672 (struct create_durable
, Data
));
1673 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1674 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1675 (struct create_durable
, Name
));
1676 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1677 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1678 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1679 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1688 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1689 unsigned int *epoch
, char *lease_key
)
1692 struct create_context
*cc
;
1694 unsigned int remaining
;
1697 data_offset
= (char *)rsp
+ le32_to_cpu(rsp
->CreateContextsOffset
);
1698 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
1699 cc
= (struct create_context
*)data_offset
;
1700 while (remaining
>= sizeof(struct create_context
)) {
1701 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1702 if (le16_to_cpu(cc
->NameLength
) == 4 &&
1703 strncmp(name
, "RqLs", 4) == 0)
1704 return server
->ops
->parse_lease_buf(cc
, epoch
,
1707 next
= le32_to_cpu(cc
->Next
);
1711 cc
= (struct create_context
*)((char *)cc
+ next
);
1718 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1719 unsigned int *num_iovec
, __u8
*oplock
)
1721 struct smb2_create_req
*req
= iov
[0].iov_base
;
1722 unsigned int num
= *num_iovec
;
1724 iov
[num
].iov_base
= server
->ops
->create_lease_buf(oplock
+1, *oplock
);
1725 if (iov
[num
].iov_base
== NULL
)
1727 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1728 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1729 if (!req
->CreateContextsOffset
)
1730 req
->CreateContextsOffset
= cpu_to_le32(
1731 sizeof(struct smb2_create_req
) +
1732 iov
[num
- 1].iov_len
);
1733 le32_add_cpu(&req
->CreateContextsLength
,
1734 server
->vals
->create_lease_size
);
1735 *num_iovec
= num
+ 1;
1739 static struct create_durable_v2
*
1740 create_durable_v2_buf(struct cifs_fid
*pfid
)
1742 struct create_durable_v2
*buf
;
1744 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1748 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1749 (struct create_durable_v2
, dcontext
));
1750 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1751 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1752 (struct create_durable_v2
, Name
));
1753 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1755 buf
->dcontext
.Timeout
= 0; /* Should this be configurable by workload */
1756 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1757 generate_random_uuid(buf
->dcontext
.CreateGuid
);
1758 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1760 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1768 static struct create_durable_handle_reconnect_v2
*
1769 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1771 struct create_durable_handle_reconnect_v2
*buf
;
1773 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1778 buf
->ccontext
.DataOffset
=
1779 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1781 buf
->ccontext
.DataLength
=
1782 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1783 buf
->ccontext
.NameOffset
=
1784 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1786 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1788 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1789 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1790 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1791 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1793 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1802 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1803 struct cifs_open_parms
*oparms
)
1805 struct smb2_create_req
*req
= iov
[0].iov_base
;
1806 unsigned int num
= *num_iovec
;
1808 iov
[num
].iov_base
= create_durable_v2_buf(oparms
->fid
);
1809 if (iov
[num
].iov_base
== NULL
)
1811 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1812 if (!req
->CreateContextsOffset
)
1813 req
->CreateContextsOffset
=
1814 cpu_to_le32(sizeof(struct smb2_create_req
) +
1816 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1817 *num_iovec
= num
+ 1;
1822 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1823 struct cifs_open_parms
*oparms
)
1825 struct smb2_create_req
*req
= iov
[0].iov_base
;
1826 unsigned int num
= *num_iovec
;
1828 /* indicate that we don't need to relock the file */
1829 oparms
->reconnect
= false;
1831 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1832 if (iov
[num
].iov_base
== NULL
)
1834 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1835 if (!req
->CreateContextsOffset
)
1836 req
->CreateContextsOffset
=
1837 cpu_to_le32(sizeof(struct smb2_create_req
) +
1839 le32_add_cpu(&req
->CreateContextsLength
,
1840 sizeof(struct create_durable_handle_reconnect_v2
));
1841 *num_iovec
= num
+ 1;
1846 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1847 struct cifs_open_parms
*oparms
, bool use_persistent
)
1849 struct smb2_create_req
*req
= iov
[0].iov_base
;
1850 unsigned int num
= *num_iovec
;
1852 if (use_persistent
) {
1853 if (oparms
->reconnect
)
1854 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1857 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1860 if (oparms
->reconnect
) {
1861 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1862 /* indicate that we don't need to relock the file */
1863 oparms
->reconnect
= false;
1865 iov
[num
].iov_base
= create_durable_buf();
1866 if (iov
[num
].iov_base
== NULL
)
1868 iov
[num
].iov_len
= sizeof(struct create_durable
);
1869 if (!req
->CreateContextsOffset
)
1870 req
->CreateContextsOffset
=
1871 cpu_to_le32(sizeof(struct smb2_create_req
) +
1873 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1874 *num_iovec
= num
+ 1;
1879 alloc_path_with_tree_prefix(__le16
**out_path
, int *out_size
, int *out_len
,
1880 const char *treename
, const __le16
*path
)
1882 int treename_len
, path_len
;
1883 struct nls_table
*cp
;
1884 const __le16 sep
[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1889 treename_len
= strlen(treename
);
1890 if (treename_len
< 2 || !(treename
[0] == '\\' && treename
[1] == '\\'))
1896 path_len
= UniStrnlen((wchar_t *)path
, PATH_MAX
);
1899 * make room for one path separator between the treename and
1902 *out_len
= treename_len
+ 1 + path_len
;
1905 * final path needs to be null-terminated UTF16 with a
1909 *out_size
= roundup((*out_len
+1)*2, 8);
1910 *out_path
= kzalloc(*out_size
, GFP_KERNEL
);
1914 cp
= load_nls_default();
1915 cifs_strtoUTF16(*out_path
, treename
, treename_len
, cp
);
1916 UniStrcat(*out_path
, sep
);
1917 UniStrcat(*out_path
, path
);
1923 #ifdef CONFIG_CIFS_SMB311
1924 int smb311_posix_mkdir(const unsigned int xid
, struct inode
*inode
,
1925 umode_t mode
, struct cifs_tcon
*tcon
,
1926 const char *full_path
,
1927 struct cifs_sb_info
*cifs_sb
)
1929 struct smb_rqst rqst
;
1930 struct smb2_create_req
*req
;
1931 struct smb2_create_rsp
*rsp
;
1932 struct TCP_Server_Info
*server
;
1933 struct cifs_ses
*ses
= tcon
->ses
;
1934 struct kvec iov
[3]; /* make sure at least one for each open context */
1935 struct kvec rsp_iov
= {NULL
, 0};
1938 __le16
*copy_path
= NULL
;
1941 unsigned int n_iov
= 2;
1942 __u32 file_attributes
= 0;
1943 char *pc_buf
= NULL
;
1945 unsigned int total_len
;
1946 __le16
*path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
1951 cifs_dbg(FYI
, "mkdir\n");
1953 if (ses
&& (ses
->server
))
1954 server
= ses
->server
;
1958 rc
= smb2_plain_req_init(SMB2_CREATE
, tcon
, (void **) &req
, &total_len
);
1963 if (smb3_encryption_required(tcon
))
1964 flags
|= CIFS_TRANSFORM_REQ
;
1967 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1968 req
->DesiredAccess
= cpu_to_le32(FILE_WRITE_ATTRIBUTES
);
1969 /* File attributes ignored on open (used in create though) */
1970 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1971 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1972 req
->CreateDisposition
= cpu_to_le32(FILE_CREATE
);
1973 req
->CreateOptions
= cpu_to_le32(CREATE_NOT_FILE
);
1975 iov
[0].iov_base
= (char *)req
;
1976 /* -1 since last byte is buf[0] which is sent below (path) */
1977 iov
[0].iov_len
= total_len
- 1;
1979 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
));
1981 /* [MS-SMB2] 2.2.13 NameOffset:
1982 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1983 * the SMB2 header, the file name includes a prefix that will
1984 * be processed during DFS name normalization as specified in
1985 * section 3.3.5.9. Otherwise, the file name is relative to
1986 * the share that is identified by the TreeId in the SMB2
1989 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
1992 req
->sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
1993 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
1995 tcon
->treeName
, path
);
1997 cifs_small_buf_release(req
);
2000 req
->NameLength
= cpu_to_le16(name_len
* 2);
2001 uni_path_len
= copy_size
;
2004 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
2005 /* MUST set path len (NameLength) to 0 opening root of share */
2006 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
2007 if (uni_path_len
% 8 != 0) {
2008 copy_size
= roundup(uni_path_len
, 8);
2009 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
2011 cifs_small_buf_release(req
);
2014 memcpy((char *)copy_path
, (const char *)path
,
2016 uni_path_len
= copy_size
;
2021 iov
[1].iov_len
= uni_path_len
;
2022 iov
[1].iov_base
= path
;
2023 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_NONE
;
2025 if (tcon
->posix_extensions
) {
2027 struct create_context
*ccontext
=
2028 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2030 cpu_to_le32(iov
[n_iov
-1].iov_len
);
2033 rc
= add_posix_context(iov
, &n_iov
, mode
);
2035 cifs_small_buf_release(req
);
2039 pc_buf
= iov
[n_iov
-1].iov_base
;
2043 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2045 rqst
.rq_nvec
= n_iov
;
2047 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
2050 cifs_small_buf_release(req
);
2051 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
2054 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
2055 trace_smb3_posix_mkdir_err(xid
, tcon
->tid
, ses
->Suid
,
2056 CREATE_NOT_FILE
, FILE_WRITE_ATTRIBUTES
, rc
);
2057 goto smb311_mkdir_exit
;
2059 trace_smb3_posix_mkdir_done(xid
, rsp
->PersistentFileId
, tcon
->tid
,
2060 ses
->Suid
, CREATE_NOT_FILE
,
2061 FILE_WRITE_ATTRIBUTES
);
2063 SMB2_close(xid
, tcon
, rsp
->PersistentFileId
, rsp
->VolatileFileId
);
2065 /* Eventually save off posix specific response info and timestaps */
2070 free_rsp_buf(resp_buftype
, rsp
);
2077 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
2078 __u8
*oplock
, struct smb2_file_all_info
*buf
,
2079 struct kvec
*err_iov
, int *buftype
)
2081 struct smb_rqst rqst
;
2082 struct smb2_create_req
*req
;
2083 struct smb2_create_rsp
*rsp
;
2084 struct TCP_Server_Info
*server
;
2085 struct cifs_tcon
*tcon
= oparms
->tcon
;
2086 struct cifs_ses
*ses
= tcon
->ses
;
2087 struct kvec iov
[5]; /* make sure at least one for each open context */
2088 struct kvec rsp_iov
= {NULL
, 0};
2091 __le16
*copy_path
= NULL
;
2094 unsigned int n_iov
= 2;
2095 __u32 file_attributes
= 0;
2096 char *dhc_buf
= NULL
, *lc_buf
= NULL
, *pc_buf
= NULL
;
2098 unsigned int total_len
;
2100 cifs_dbg(FYI
, "create/open\n");
2102 if (ses
&& (ses
->server
))
2103 server
= ses
->server
;
2107 rc
= smb2_plain_req_init(SMB2_CREATE
, tcon
, (void **) &req
, &total_len
);
2112 if (smb3_encryption_required(tcon
))
2113 flags
|= CIFS_TRANSFORM_REQ
;
2115 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
2116 file_attributes
|= ATTR_READONLY
;
2117 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
2118 file_attributes
|= ATTR_SYSTEM
;
2120 req
->ImpersonationLevel
= IL_IMPERSONATION
;
2121 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
2122 /* File attributes ignored on open (used in create though) */
2123 req
->FileAttributes
= cpu_to_le32(file_attributes
);
2124 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
2125 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
2126 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
2128 iov
[0].iov_base
= (char *)req
;
2129 /* -1 since last byte is buf[0] which is sent below (path) */
2130 iov
[0].iov_len
= total_len
- 1;
2132 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
));
2134 /* [MS-SMB2] 2.2.13 NameOffset:
2135 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2136 * the SMB2 header, the file name includes a prefix that will
2137 * be processed during DFS name normalization as specified in
2138 * section 3.3.5.9. Otherwise, the file name is relative to
2139 * the share that is identified by the TreeId in the SMB2
2142 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
2145 req
->sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
2146 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
2148 tcon
->treeName
, path
);
2150 cifs_small_buf_release(req
);
2153 req
->NameLength
= cpu_to_le16(name_len
* 2);
2154 uni_path_len
= copy_size
;
2157 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
2158 /* MUST set path len (NameLength) to 0 opening root of share */
2159 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
2160 if (uni_path_len
% 8 != 0) {
2161 copy_size
= roundup(uni_path_len
, 8);
2162 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
2164 cifs_small_buf_release(req
);
2167 memcpy((char *)copy_path
, (const char *)path
,
2169 uni_path_len
= copy_size
;
2174 iov
[1].iov_len
= uni_path_len
;
2175 iov
[1].iov_base
= path
;
2177 if (!server
->oplocks
)
2178 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2180 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
2181 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
2182 req
->RequestedOplockLevel
= *oplock
;
2184 rc
= add_lease_context(server
, iov
, &n_iov
, oplock
);
2186 cifs_small_buf_release(req
);
2190 lc_buf
= iov
[n_iov
-1].iov_base
;
2193 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
2194 /* need to set Next field of lease context if we request it */
2195 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
2196 struct create_context
*ccontext
=
2197 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2199 cpu_to_le32(server
->vals
->create_lease_size
);
2202 rc
= add_durable_context(iov
, &n_iov
, oparms
,
2203 tcon
->use_persistent
);
2205 cifs_small_buf_release(req
);
2210 dhc_buf
= iov
[n_iov
-1].iov_base
;
2213 #ifdef CONFIG_CIFS_SMB311
2214 if (tcon
->posix_extensions
) {
2216 struct create_context
*ccontext
=
2217 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2219 cpu_to_le32(iov
[n_iov
-1].iov_len
);
2222 rc
= add_posix_context(iov
, &n_iov
, oparms
->mode
);
2224 cifs_small_buf_release(req
);
2230 pc_buf
= iov
[n_iov
-1].iov_base
;
2234 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2236 rqst
.rq_nvec
= n_iov
;
2238 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
2240 cifs_small_buf_release(req
);
2241 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
2244 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
2245 if (err_iov
&& rsp
) {
2247 *buftype
= resp_buftype
;
2248 resp_buftype
= CIFS_NO_BUFFER
;
2251 trace_smb3_open_err(xid
, tcon
->tid
, ses
->Suid
,
2252 oparms
->create_options
, oparms
->desired_access
, rc
);
2255 trace_smb3_open_done(xid
, rsp
->PersistentFileId
, tcon
->tid
,
2256 ses
->Suid
, oparms
->create_options
,
2257 oparms
->desired_access
);
2259 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
2260 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
2263 memcpy(buf
, &rsp
->CreationTime
, 32);
2264 buf
->AllocationSize
= rsp
->AllocationSize
;
2265 buf
->EndOfFile
= rsp
->EndofFile
;
2266 buf
->Attributes
= rsp
->FileAttributes
;
2267 buf
->NumberOfLinks
= cpu_to_le32(1);
2268 buf
->DeletePending
= 0;
2271 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
2272 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
,
2273 oparms
->fid
->lease_key
);
2275 *oplock
= rsp
->OplockLevel
;
2281 free_rsp_buf(resp_buftype
, rsp
);
2286 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2289 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2290 u64 volatile_fid
, u32 opcode
, bool is_fsctl
,
2291 char *in_data
, u32 indatalen
,
2292 char **out_data
, u32
*plen
/* returned data len */)
2294 struct smb_rqst rqst
;
2295 struct smb2_ioctl_req
*req
;
2296 struct smb2_ioctl_rsp
*rsp
;
2297 struct cifs_ses
*ses
;
2299 struct kvec rsp_iov
;
2304 unsigned int total_len
;
2306 cifs_dbg(FYI
, "SMB2 IOCTL\n");
2308 if (out_data
!= NULL
)
2311 /* zero out returned data len, in case of error */
2320 if (!ses
|| !(ses
->server
))
2323 rc
= smb2_plain_req_init(SMB2_IOCTL
, tcon
, (void **) &req
, &total_len
);
2327 if (smb3_encryption_required(tcon
))
2328 flags
|= CIFS_TRANSFORM_REQ
;
2330 req
->CtlCode
= cpu_to_le32(opcode
);
2331 req
->PersistentFileId
= persistent_fid
;
2332 req
->VolatileFileId
= volatile_fid
;
2335 req
->InputCount
= cpu_to_le32(indatalen
);
2336 /* do not set InputOffset if no input data */
2338 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
));
2339 iov
[1].iov_base
= in_data
;
2340 iov
[1].iov_len
= indatalen
;
2345 req
->OutputOffset
= 0;
2346 req
->OutputCount
= 0; /* MBZ */
2349 * Could increase MaxOutputResponse, but that would require more
2350 * than one credit. Windows typically sets this smaller, but for some
2351 * ioctls it may be useful to allow server to send more. No point
2352 * limiting what the server can send as long as fits in one credit
2353 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
2354 * (by default, note that it can be overridden to make max larger)
2355 * in responses (except for read responses which can be bigger.
2356 * We may want to bump this limit up
2358 req
->MaxOutputResponse
= cpu_to_le32(CIFSMaxBufSize
);
2361 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
2365 iov
[0].iov_base
= (char *)req
;
2368 * If no input data, the size of ioctl struct in
2369 * protocol spec still includes a 1 byte data buffer,
2370 * but if input data passed to ioctl, we do not
2371 * want to double count this, so we do not send
2372 * the dummy one byte of data in iovec[0] if sending
2373 * input data (in iovec[1]).
2377 iov
[0].iov_len
= total_len
- 1;
2379 iov
[0].iov_len
= total_len
;
2381 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2382 if (opcode
== FSCTL_VALIDATE_NEGOTIATE_INFO
)
2383 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
2385 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2387 rqst
.rq_nvec
= n_iov
;
2389 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
2391 cifs_small_buf_release(req
);
2392 rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
.iov_base
;
2395 trace_smb3_fsctl_err(xid
, persistent_fid
, tcon
->tid
,
2396 ses
->Suid
, 0, opcode
, rc
);
2398 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
2399 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
2401 } else if (rc
== -EINVAL
) {
2402 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
2403 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
2404 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
2409 /* check if caller wants to look at return data or just return rc */
2410 if ((plen
== NULL
) || (out_data
== NULL
))
2413 *plen
= le32_to_cpu(rsp
->OutputCount
);
2415 /* We check for obvious errors in the output buffer length and offset */
2417 goto ioctl_exit
; /* server returned no data */
2418 else if (*plen
> 0xFF00) {
2419 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
2425 if (rsp_iov
.iov_len
< le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
2426 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
2427 le32_to_cpu(rsp
->OutputOffset
));
2433 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
2434 if (*out_data
== NULL
) {
2439 memcpy(*out_data
, (char *)rsp
+ le32_to_cpu(rsp
->OutputOffset
), *plen
);
2441 free_rsp_buf(resp_buftype
, rsp
);
2446 * Individual callers to ioctl worker function follow
2450 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
2451 u64 persistent_fid
, u64 volatile_fid
)
2454 struct compress_ioctl fsctl_input
;
2455 char *ret_data
= NULL
;
2457 fsctl_input
.CompressionState
=
2458 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
2460 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
2461 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
2462 (char *)&fsctl_input
/* data input */,
2463 2 /* in data len */, &ret_data
/* out data */, NULL
);
2465 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
2471 SMB2_close_flags(const unsigned int xid
, struct cifs_tcon
*tcon
,
2472 u64 persistent_fid
, u64 volatile_fid
, int flags
)
2474 struct smb_rqst rqst
;
2475 struct smb2_close_req
*req
;
2476 struct smb2_close_rsp
*rsp
;
2477 struct cifs_ses
*ses
= tcon
->ses
;
2479 struct kvec rsp_iov
;
2482 unsigned int total_len
;
2484 cifs_dbg(FYI
, "Close\n");
2486 if (!ses
|| !(ses
->server
))
2489 rc
= smb2_plain_req_init(SMB2_CLOSE
, tcon
, (void **) &req
, &total_len
);
2493 if (smb3_encryption_required(tcon
))
2494 flags
|= CIFS_TRANSFORM_REQ
;
2496 req
->PersistentFileId
= persistent_fid
;
2497 req
->VolatileFileId
= volatile_fid
;
2499 iov
[0].iov_base
= (char *)req
;
2500 iov
[0].iov_len
= total_len
;
2502 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2506 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2507 cifs_small_buf_release(req
);
2508 rsp
= (struct smb2_close_rsp
*)rsp_iov
.iov_base
;
2511 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
2512 trace_smb3_close_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
2517 /* BB FIXME - decode close response, update inode for caching */
2520 free_rsp_buf(resp_buftype
, rsp
);
2525 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
2526 u64 persistent_fid
, u64 volatile_fid
)
2528 return SMB2_close_flags(xid
, tcon
, persistent_fid
, volatile_fid
, 0);
2532 validate_iov(unsigned int offset
, unsigned int buffer_length
,
2533 struct kvec
*iov
, unsigned int min_buf_size
)
2535 unsigned int smb_len
= iov
->iov_len
;
2536 char *end_of_smb
= smb_len
+ (char *)iov
->iov_base
;
2537 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
2538 char *end_of_buf
= begin_of_buf
+ buffer_length
;
2541 if (buffer_length
< min_buf_size
) {
2542 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
2543 buffer_length
, min_buf_size
);
2547 /* check if beyond RFC1001 maximum length */
2548 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
2549 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
2550 buffer_length
, smb_len
);
2554 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
2555 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
2563 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2564 * Caller must free buffer.
2567 validate_and_copy_iov(unsigned int offset
, unsigned int buffer_length
,
2568 struct kvec
*iov
, unsigned int minbufsize
,
2571 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
2577 rc
= validate_iov(offset
, buffer_length
, iov
, minbufsize
);
2581 memcpy(data
, begin_of_buf
, buffer_length
);
2587 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2588 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
, u8 info_type
,
2589 u32 additional_info
, size_t output_len
, size_t min_len
, void **data
,
2592 struct smb_rqst rqst
;
2593 struct smb2_query_info_req
*req
;
2594 struct smb2_query_info_rsp
*rsp
= NULL
;
2596 struct kvec rsp_iov
;
2599 struct cifs_ses
*ses
= tcon
->ses
;
2601 unsigned int total_len
;
2603 cifs_dbg(FYI
, "Query Info\n");
2605 if (!ses
|| !(ses
->server
))
2608 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
,
2613 if (smb3_encryption_required(tcon
))
2614 flags
|= CIFS_TRANSFORM_REQ
;
2616 req
->InfoType
= info_type
;
2617 req
->FileInfoClass
= info_class
;
2618 req
->PersistentFileId
= persistent_fid
;
2619 req
->VolatileFileId
= volatile_fid
;
2620 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
2623 * We do not use the input buffer (do not send extra byte)
2625 req
->InputBufferOffset
= 0;
2627 req
->OutputBufferLength
= cpu_to_le32(output_len
);
2629 iov
[0].iov_base
= (char *)req
;
2631 iov
[0].iov_len
= total_len
- 1;
2633 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2637 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2638 cifs_small_buf_release(req
);
2639 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
2642 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2643 trace_smb3_query_info_err(xid
, persistent_fid
, tcon
->tid
,
2644 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
2649 *dlen
= le32_to_cpu(rsp
->OutputBufferLength
);
2651 *data
= kmalloc(*dlen
, GFP_KERNEL
);
2654 "Error %d allocating memory for acl\n",
2662 rc
= validate_and_copy_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
2663 le32_to_cpu(rsp
->OutputBufferLength
),
2664 &rsp_iov
, min_len
, *data
);
2667 free_rsp_buf(resp_buftype
, rsp
);
2671 int SMB2_query_eas(const unsigned int xid
, struct cifs_tcon
*tcon
,
2672 u64 persistent_fid
, u64 volatile_fid
,
2673 int ea_buf_size
, struct smb2_file_full_ea_info
*data
)
2675 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2676 FILE_FULL_EA_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2678 sizeof(struct smb2_file_full_ea_info
),
2683 int SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2684 u64 persistent_fid
, u64 volatile_fid
, struct smb2_file_all_info
*data
)
2686 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2687 FILE_ALL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2688 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
2689 sizeof(struct smb2_file_all_info
), (void **)&data
,
2694 SMB2_query_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
2695 u64 persistent_fid
, u64 volatile_fid
,
2696 void **data
, u32
*plen
)
2698 __u32 additional_info
= OWNER_SECINFO
| GROUP_SECINFO
| DACL_SECINFO
;
2701 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2702 0, SMB2_O_INFO_SECURITY
, additional_info
,
2703 SMB2_MAX_BUFFER_SIZE
, MIN_SEC_DESC_LEN
, data
, plen
);
2707 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
2708 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
2710 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2711 FILE_INTERNAL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2712 sizeof(struct smb2_file_internal_info
),
2713 sizeof(struct smb2_file_internal_info
),
2714 (void **)&uniqueid
, NULL
);
2718 * This is a no-op for now. We're not really interested in the reply, but
2719 * rather in the fact that the server sent one and that server->lstrp
2722 * FIXME: maybe we should consider checking that the reply matches request?
2725 smb2_echo_callback(struct mid_q_entry
*mid
)
2727 struct TCP_Server_Info
*server
= mid
->callback_data
;
2728 struct smb2_echo_rsp
*rsp
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
2729 unsigned int credits_received
= 1;
2731 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
2732 credits_received
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
2734 DeleteMidQEntry(mid
);
2735 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
2738 void smb2_reconnect_server(struct work_struct
*work
)
2740 struct TCP_Server_Info
*server
= container_of(work
,
2741 struct TCP_Server_Info
, reconnect
.work
);
2742 struct cifs_ses
*ses
;
2743 struct cifs_tcon
*tcon
, *tcon2
;
2744 struct list_head tmp_list
;
2745 int tcon_exist
= false;
2747 int resched
= false;
2750 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2751 mutex_lock(&server
->reconnect_mutex
);
2753 INIT_LIST_HEAD(&tmp_list
);
2754 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
2756 spin_lock(&cifs_tcp_ses_lock
);
2757 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
2758 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
2759 if (tcon
->need_reconnect
|| tcon
->need_reopen_files
) {
2761 list_add_tail(&tcon
->rlist
, &tmp_list
);
2765 if (ses
->tcon_ipc
&& ses
->tcon_ipc
->need_reconnect
) {
2766 list_add_tail(&ses
->tcon_ipc
->rlist
, &tmp_list
);
2771 * Get the reference to server struct to be sure that the last call of
2772 * cifs_put_tcon() in the loop below won't release the server pointer.
2775 server
->srv_count
++;
2777 spin_unlock(&cifs_tcp_ses_lock
);
2779 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
2780 rc
= smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
);
2782 cifs_reopen_persistent_handles(tcon
);
2785 list_del_init(&tcon
->rlist
);
2786 cifs_put_tcon(tcon
);
2789 cifs_dbg(FYI
, "Reconnecting tcons finished\n");
2791 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 2 * HZ
);
2792 mutex_unlock(&server
->reconnect_mutex
);
2794 /* now we can safely release srv struct */
2796 cifs_put_tcp_session(server
, 1);
2800 SMB2_echo(struct TCP_Server_Info
*server
)
2802 struct smb2_echo_req
*req
;
2805 struct smb_rqst rqst
= { .rq_iov
= iov
,
2807 unsigned int total_len
;
2809 cifs_dbg(FYI
, "In echo request\n");
2811 if (server
->tcpStatus
== CifsNeedNegotiate
) {
2812 /* No need to send echo on newly established connections */
2813 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
2817 rc
= smb2_plain_req_init(SMB2_ECHO
, NULL
, (void **)&req
, &total_len
);
2821 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
2823 iov
[0].iov_len
= total_len
;
2824 iov
[0].iov_base
= (char *)req
;
2826 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, NULL
,
2827 server
, CIFS_ECHO_OP
);
2829 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
2831 cifs_small_buf_release(req
);
2836 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2839 struct smb_rqst rqst
;
2840 struct smb2_flush_req
*req
;
2841 struct cifs_ses
*ses
= tcon
->ses
;
2843 struct kvec rsp_iov
;
2847 unsigned int total_len
;
2849 cifs_dbg(FYI
, "Flush\n");
2851 if (!ses
|| !(ses
->server
))
2854 rc
= smb2_plain_req_init(SMB2_FLUSH
, tcon
, (void **) &req
, &total_len
);
2858 if (smb3_encryption_required(tcon
))
2859 flags
|= CIFS_TRANSFORM_REQ
;
2861 req
->PersistentFileId
= persistent_fid
;
2862 req
->VolatileFileId
= volatile_fid
;
2864 iov
[0].iov_base
= (char *)req
;
2865 iov
[0].iov_len
= total_len
;
2867 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2871 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2872 cifs_small_buf_release(req
);
2875 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
2876 trace_smb3_flush_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
2880 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2885 * To form a chain of read requests, any read requests after the first should
2886 * have the end_of_chain boolean set to true.
2889 smb2_new_read_req(void **buf
, unsigned int *total_len
,
2890 struct cifs_io_parms
*io_parms
, struct cifs_readdata
*rdata
,
2891 unsigned int remaining_bytes
, int request_type
)
2894 struct smb2_read_plain_req
*req
= NULL
;
2895 struct smb2_sync_hdr
*shdr
;
2896 struct TCP_Server_Info
*server
;
2898 rc
= smb2_plain_req_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
,
2903 server
= io_parms
->tcon
->ses
->server
;
2905 return -ECONNABORTED
;
2907 shdr
= &req
->sync_hdr
;
2908 shdr
->ProcessId
= cpu_to_le32(io_parms
->pid
);
2910 req
->PersistentFileId
= io_parms
->persistent_fid
;
2911 req
->VolatileFileId
= io_parms
->volatile_fid
;
2912 req
->ReadChannelInfoOffset
= 0; /* reserved */
2913 req
->ReadChannelInfoLength
= 0; /* reserved */
2914 req
->Channel
= 0; /* reserved */
2915 req
->MinimumCount
= 0;
2916 req
->Length
= cpu_to_le32(io_parms
->length
);
2917 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2918 #ifdef CONFIG_CIFS_SMB_DIRECT
2920 * If we want to do a RDMA write, fill in and append
2921 * smbd_buffer_descriptor_v1 to the end of read request
2923 if (server
->rdma
&& rdata
&& !server
->sign
&&
2924 rdata
->bytes
>= server
->smbd_conn
->rdma_readwrite_threshold
) {
2926 struct smbd_buffer_descriptor_v1
*v1
;
2927 bool need_invalidate
=
2928 io_parms
->tcon
->ses
->server
->dialect
== SMB30_PROT_ID
;
2930 rdata
->mr
= smbd_register_mr(
2931 server
->smbd_conn
, rdata
->pages
,
2932 rdata
->nr_pages
, rdata
->page_offset
,
2933 rdata
->tailsz
, true, need_invalidate
);
2937 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
2938 if (need_invalidate
)
2939 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
2940 req
->ReadChannelInfoOffset
=
2941 cpu_to_le16(offsetof(struct smb2_read_plain_req
, Buffer
));
2942 req
->ReadChannelInfoLength
=
2943 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
2944 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
2945 v1
->offset
= cpu_to_le64(rdata
->mr
->mr
->iova
);
2946 v1
->token
= cpu_to_le32(rdata
->mr
->mr
->rkey
);
2947 v1
->length
= cpu_to_le32(rdata
->mr
->mr
->length
);
2949 *total_len
+= sizeof(*v1
) - 1;
2952 if (request_type
& CHAINED_REQUEST
) {
2953 if (!(request_type
& END_OF_CHAIN
)) {
2954 /* next 8-byte aligned request */
2955 *total_len
= DIV_ROUND_UP(*total_len
, 8) * 8;
2956 shdr
->NextCommand
= cpu_to_le32(*total_len
);
2957 } else /* END_OF_CHAIN */
2958 shdr
->NextCommand
= 0;
2959 if (request_type
& RELATED_REQUEST
) {
2960 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
2962 * Related requests use info from previous read request
2965 shdr
->SessionId
= 0xFFFFFFFF;
2966 shdr
->TreeId
= 0xFFFFFFFF;
2967 req
->PersistentFileId
= 0xFFFFFFFF;
2968 req
->VolatileFileId
= 0xFFFFFFFF;
2971 if (remaining_bytes
> io_parms
->length
)
2972 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
2974 req
->RemainingBytes
= 0;
2981 smb2_readv_callback(struct mid_q_entry
*mid
)
2983 struct cifs_readdata
*rdata
= mid
->callback_data
;
2984 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
2985 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2986 struct smb2_sync_hdr
*shdr
=
2987 (struct smb2_sync_hdr
*)rdata
->iov
[0].iov_base
;
2988 unsigned int credits_received
= 1;
2989 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
2991 .rq_pages
= rdata
->pages
,
2992 .rq_offset
= rdata
->page_offset
,
2993 .rq_npages
= rdata
->nr_pages
,
2994 .rq_pagesz
= rdata
->pagesz
,
2995 .rq_tailsz
= rdata
->tailsz
};
2997 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2998 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
3001 switch (mid
->mid_state
) {
3002 case MID_RESPONSE_RECEIVED
:
3003 credits_received
= le16_to_cpu(shdr
->CreditRequest
);
3004 /* result already set, check signature */
3005 if (server
->sign
&& !mid
->decrypted
) {
3008 rc
= smb2_verify_signature(&rqst
, server
);
3010 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
3013 /* FIXME: should this be counted toward the initiating task? */
3014 task_io_account_read(rdata
->got_bytes
);
3015 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
3017 case MID_REQUEST_SUBMITTED
:
3018 case MID_RETRY_NEEDED
:
3019 rdata
->result
= -EAGAIN
;
3020 if (server
->sign
&& rdata
->got_bytes
)
3021 /* reset bytes number since we can not check a sign */
3022 rdata
->got_bytes
= 0;
3023 /* FIXME: should this be counted toward the initiating task? */
3024 task_io_account_read(rdata
->got_bytes
);
3025 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
3028 if (rdata
->result
!= -ENODATA
)
3029 rdata
->result
= -EIO
;
3031 #ifdef CONFIG_CIFS_SMB_DIRECT
3033 * If this rdata has a memmory registered, the MR can be freed
3034 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3035 * because they have limited number and are used for future I/Os
3038 smbd_deregister_mr(rdata
->mr
);
3043 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
3045 queue_work(cifsiod_wq
, &rdata
->work
);
3046 DeleteMidQEntry(mid
);
3047 add_credits(server
, credits_received
, 0);
3050 /* smb2_async_readv - send an async read, and set up mid to handle result */
3052 smb2_async_readv(struct cifs_readdata
*rdata
)
3056 struct smb2_sync_hdr
*shdr
;
3057 struct cifs_io_parms io_parms
;
3058 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
3060 struct TCP_Server_Info
*server
;
3061 unsigned int total_len
;
3063 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
3064 __func__
, rdata
->offset
, rdata
->bytes
);
3066 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
3067 io_parms
.offset
= rdata
->offset
;
3068 io_parms
.length
= rdata
->bytes
;
3069 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
3070 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
3071 io_parms
.pid
= rdata
->pid
;
3073 server
= io_parms
.tcon
->ses
->server
;
3075 rc
= smb2_new_read_req(
3076 (void **) &buf
, &total_len
, &io_parms
, rdata
, 0, 0);
3078 if (rc
== -EAGAIN
&& rdata
->credits
) {
3079 /* credits was reset by reconnect */
3081 /* reduce in_flight value since we won't send the req */
3082 spin_lock(&server
->req_lock
);
3083 server
->in_flight
--;
3084 spin_unlock(&server
->req_lock
);
3089 if (smb3_encryption_required(io_parms
.tcon
))
3090 flags
|= CIFS_TRANSFORM_REQ
;
3092 rdata
->iov
[0].iov_base
= buf
;
3093 rdata
->iov
[0].iov_len
= total_len
;
3095 shdr
= (struct smb2_sync_hdr
*)buf
;
3097 if (rdata
->credits
) {
3098 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
3099 SMB2_MAX_BUFFER_SIZE
));
3100 shdr
->CreditRequest
= shdr
->CreditCharge
;
3101 spin_lock(&server
->req_lock
);
3102 server
->credits
+= rdata
->credits
-
3103 le16_to_cpu(shdr
->CreditCharge
);
3104 spin_unlock(&server
->req_lock
);
3105 wake_up(&server
->request_q
);
3106 flags
|= CIFS_HAS_CREDITS
;
3109 kref_get(&rdata
->refcount
);
3110 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
3111 cifs_readv_receive
, smb2_readv_callback
,
3112 smb3_handle_read_data
, rdata
, flags
);
3114 kref_put(&rdata
->refcount
, cifs_readdata_release
);
3115 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
3116 trace_smb3_read_err(rc
, 0 /* xid */, io_parms
.persistent_fid
,
3117 io_parms
.tcon
->tid
, io_parms
.tcon
->ses
->Suid
,
3118 io_parms
.offset
, io_parms
.length
);
3120 trace_smb3_read_done(0 /* xid */, io_parms
.persistent_fid
,
3121 io_parms
.tcon
->tid
, io_parms
.tcon
->ses
->Suid
,
3122 io_parms
.offset
, io_parms
.length
);
3124 cifs_small_buf_release(buf
);
3129 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
3130 unsigned int *nbytes
, char **buf
, int *buf_type
)
3132 struct smb_rqst rqst
;
3133 int resp_buftype
, rc
= -EACCES
;
3134 struct smb2_read_plain_req
*req
= NULL
;
3135 struct smb2_read_rsp
*rsp
= NULL
;
3137 struct kvec rsp_iov
;
3138 unsigned int total_len
;
3139 int flags
= CIFS_LOG_ERROR
;
3140 struct cifs_ses
*ses
= io_parms
->tcon
->ses
;
3143 rc
= smb2_new_read_req((void **)&req
, &total_len
, io_parms
, NULL
, 0, 0);
3147 if (smb3_encryption_required(io_parms
->tcon
))
3148 flags
|= CIFS_TRANSFORM_REQ
;
3150 iov
[0].iov_base
= (char *)req
;
3151 iov
[0].iov_len
= total_len
;
3153 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3157 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3158 cifs_small_buf_release(req
);
3160 rsp
= (struct smb2_read_rsp
*)rsp_iov
.iov_base
;
3163 if (rc
!= -ENODATA
) {
3164 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
3165 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
3167 trace_smb3_read_err(rc
, xid
, req
->PersistentFileId
,
3168 io_parms
->tcon
->tid
, ses
->Suid
,
3169 io_parms
->offset
, io_parms
->length
);
3170 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3171 return rc
== -ENODATA
? 0 : rc
;
3173 trace_smb3_read_done(xid
, req
->PersistentFileId
,
3174 io_parms
->tcon
->tid
, ses
->Suid
,
3175 io_parms
->offset
, io_parms
->length
);
3177 *nbytes
= le32_to_cpu(rsp
->DataLength
);
3178 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
3179 (*nbytes
> io_parms
->length
)) {
3180 cifs_dbg(FYI
, "bad length %d for count %d\n",
3181 *nbytes
, io_parms
->length
);
3187 memcpy(*buf
, (char *)rsp
+ rsp
->DataOffset
, *nbytes
);
3188 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3189 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
3190 *buf
= rsp_iov
.iov_base
;
3191 if (resp_buftype
== CIFS_SMALL_BUFFER
)
3192 *buf_type
= CIFS_SMALL_BUFFER
;
3193 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
3194 *buf_type
= CIFS_LARGE_BUFFER
;
3200 * Check the mid_state and signature on received buffer (if any), and queue the
3201 * workqueue completion task.
3204 smb2_writev_callback(struct mid_q_entry
*mid
)
3206 struct cifs_writedata
*wdata
= mid
->callback_data
;
3207 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
3208 unsigned int written
;
3209 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
3210 unsigned int credits_received
= 1;
3212 switch (mid
->mid_state
) {
3213 case MID_RESPONSE_RECEIVED
:
3214 credits_received
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
3215 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
3216 if (wdata
->result
!= 0)
3219 written
= le32_to_cpu(rsp
->DataLength
);
3221 * Mask off high 16 bits when bytes written as returned
3222 * by the server is greater than bytes requested by the
3223 * client. OS/2 servers are known to set incorrect
3226 if (written
> wdata
->bytes
)
3229 if (written
< wdata
->bytes
)
3230 wdata
->result
= -ENOSPC
;
3232 wdata
->bytes
= written
;
3234 case MID_REQUEST_SUBMITTED
:
3235 case MID_RETRY_NEEDED
:
3236 wdata
->result
= -EAGAIN
;
3239 wdata
->result
= -EIO
;
3242 #ifdef CONFIG_CIFS_SMB_DIRECT
3244 * If this wdata has a memory registered, the MR can be freed
3245 * The number of MRs available is limited, it's important to recover
3246 * used MR as soon as I/O is finished. Hold MR longer in the later
3247 * I/O process can possibly result in I/O deadlock due to lack of MR
3248 * to send request on I/O retry
3251 smbd_deregister_mr(wdata
->mr
);
3256 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
3258 queue_work(cifsiod_wq
, &wdata
->work
);
3259 DeleteMidQEntry(mid
);
3260 add_credits(tcon
->ses
->server
, credits_received
, 0);
3263 /* smb2_async_writev - send an async write, and set up mid to handle result */
3265 smb2_async_writev(struct cifs_writedata
*wdata
,
3266 void (*release
)(struct kref
*kref
))
3268 int rc
= -EACCES
, flags
= 0;
3269 struct smb2_write_req
*req
= NULL
;
3270 struct smb2_sync_hdr
*shdr
;
3271 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
3272 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
3274 struct smb_rqst rqst
= { };
3275 unsigned int total_len
;
3277 rc
= smb2_plain_req_init(SMB2_WRITE
, tcon
, (void **) &req
, &total_len
);
3279 if (rc
== -EAGAIN
&& wdata
->credits
) {
3280 /* credits was reset by reconnect */
3282 /* reduce in_flight value since we won't send the req */
3283 spin_lock(&server
->req_lock
);
3284 server
->in_flight
--;
3285 spin_unlock(&server
->req_lock
);
3287 goto async_writev_out
;
3290 if (smb3_encryption_required(tcon
))
3291 flags
|= CIFS_TRANSFORM_REQ
;
3293 shdr
= (struct smb2_sync_hdr
*)req
;
3294 shdr
->ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
3296 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
3297 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
3298 req
->WriteChannelInfoOffset
= 0;
3299 req
->WriteChannelInfoLength
= 0;
3301 req
->Offset
= cpu_to_le64(wdata
->offset
);
3302 req
->DataOffset
= cpu_to_le16(
3303 offsetof(struct smb2_write_req
, Buffer
));
3304 req
->RemainingBytes
= 0;
3305 #ifdef CONFIG_CIFS_SMB_DIRECT
3307 * If we want to do a server RDMA read, fill in and append
3308 * smbd_buffer_descriptor_v1 to the end of write request
3310 if (server
->rdma
&& !server
->sign
&& wdata
->bytes
>=
3311 server
->smbd_conn
->rdma_readwrite_threshold
) {
3313 struct smbd_buffer_descriptor_v1
*v1
;
3314 bool need_invalidate
= server
->dialect
== SMB30_PROT_ID
;
3316 wdata
->mr
= smbd_register_mr(
3317 server
->smbd_conn
, wdata
->pages
,
3318 wdata
->nr_pages
, wdata
->page_offset
,
3319 wdata
->tailsz
, false, need_invalidate
);
3322 goto async_writev_out
;
3325 req
->DataOffset
= 0;
3326 if (wdata
->nr_pages
> 1)
3327 req
->RemainingBytes
=
3329 (wdata
->nr_pages
- 1) * wdata
->pagesz
-
3330 wdata
->page_offset
+ wdata
->tailsz
3333 req
->RemainingBytes
= cpu_to_le32(wdata
->tailsz
);
3334 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
3335 if (need_invalidate
)
3336 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
3337 req
->WriteChannelInfoOffset
=
3338 cpu_to_le16(offsetof(struct smb2_write_req
, Buffer
));
3339 req
->WriteChannelInfoLength
=
3340 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
3341 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
3342 v1
->offset
= cpu_to_le64(wdata
->mr
->mr
->iova
);
3343 v1
->token
= cpu_to_le32(wdata
->mr
->mr
->rkey
);
3344 v1
->length
= cpu_to_le32(wdata
->mr
->mr
->length
);
3347 iov
[0].iov_len
= total_len
- 1;
3348 iov
[0].iov_base
= (char *)req
;
3352 rqst
.rq_pages
= wdata
->pages
;
3353 rqst
.rq_offset
= wdata
->page_offset
;
3354 rqst
.rq_npages
= wdata
->nr_pages
;
3355 rqst
.rq_pagesz
= wdata
->pagesz
;
3356 rqst
.rq_tailsz
= wdata
->tailsz
;
3357 #ifdef CONFIG_CIFS_SMB_DIRECT
3359 iov
[0].iov_len
+= sizeof(struct smbd_buffer_descriptor_v1
);
3363 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
3364 wdata
->offset
, wdata
->bytes
);
3366 #ifdef CONFIG_CIFS_SMB_DIRECT
3367 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3369 req
->Length
= cpu_to_le32(wdata
->bytes
);
3371 req
->Length
= cpu_to_le32(wdata
->bytes
);
3374 if (wdata
->credits
) {
3375 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
3376 SMB2_MAX_BUFFER_SIZE
));
3377 shdr
->CreditRequest
= shdr
->CreditCharge
;
3378 spin_lock(&server
->req_lock
);
3379 server
->credits
+= wdata
->credits
-
3380 le16_to_cpu(shdr
->CreditCharge
);
3381 spin_unlock(&server
->req_lock
);
3382 wake_up(&server
->request_q
);
3383 flags
|= CIFS_HAS_CREDITS
;
3386 kref_get(&wdata
->refcount
);
3387 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, NULL
,
3391 trace_smb3_write_err(0 /* no xid */, req
->PersistentFileId
,
3392 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
3394 kref_put(&wdata
->refcount
, release
);
3395 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
3397 trace_smb3_write_done(0 /* no xid */, req
->PersistentFileId
,
3398 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
3402 cifs_small_buf_release(req
);
3407 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3408 * The length field from io_parms must be at least 1 and indicates a number of
3409 * elements with data to write that begins with position 1 in iov array. All
3410 * data length is specified by count.
3413 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
3414 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
3416 struct smb_rqst rqst
;
3418 struct smb2_write_req
*req
= NULL
;
3419 struct smb2_write_rsp
*rsp
= NULL
;
3421 struct kvec rsp_iov
;
3423 unsigned int total_len
;
3430 rc
= smb2_plain_req_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
,
3435 if (io_parms
->tcon
->ses
->server
== NULL
)
3436 return -ECONNABORTED
;
3438 if (smb3_encryption_required(io_parms
->tcon
))
3439 flags
|= CIFS_TRANSFORM_REQ
;
3441 req
->sync_hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
3443 req
->PersistentFileId
= io_parms
->persistent_fid
;
3444 req
->VolatileFileId
= io_parms
->volatile_fid
;
3445 req
->WriteChannelInfoOffset
= 0;
3446 req
->WriteChannelInfoLength
= 0;
3448 req
->Length
= cpu_to_le32(io_parms
->length
);
3449 req
->Offset
= cpu_to_le64(io_parms
->offset
);
3450 req
->DataOffset
= cpu_to_le16(
3451 offsetof(struct smb2_write_req
, Buffer
));
3452 req
->RemainingBytes
= 0;
3454 iov
[0].iov_base
= (char *)req
;
3456 iov
[0].iov_len
= total_len
- 1;
3458 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3460 rqst
.rq_nvec
= n_vec
+ 1;
3462 rc
= cifs_send_recv(xid
, io_parms
->tcon
->ses
, &rqst
,
3463 &resp_buftype
, flags
, &rsp_iov
);
3464 cifs_small_buf_release(req
);
3465 rsp
= (struct smb2_write_rsp
*)rsp_iov
.iov_base
;
3468 trace_smb3_write_err(xid
, req
->PersistentFileId
,
3469 io_parms
->tcon
->tid
,
3470 io_parms
->tcon
->ses
->Suid
,
3471 io_parms
->offset
, io_parms
->length
, rc
);
3472 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
3473 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
3475 *nbytes
= le32_to_cpu(rsp
->DataLength
);
3476 trace_smb3_write_done(xid
, req
->PersistentFileId
,
3477 io_parms
->tcon
->tid
,
3478 io_parms
->tcon
->ses
->Suid
,
3479 io_parms
->offset
, *nbytes
);
3482 free_rsp_buf(resp_buftype
, rsp
);
3487 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
3490 unsigned int entrycount
= 0;
3491 unsigned int next_offset
= 0;
3492 FILE_DIRECTORY_INFO
*entryptr
;
3494 if (bufstart
== NULL
)
3497 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
3500 entryptr
= (FILE_DIRECTORY_INFO
*)
3501 ((char *)entryptr
+ next_offset
);
3503 if ((char *)entryptr
+ size
> end_of_buf
) {
3504 cifs_dbg(VFS
, "malformed search entry would overflow\n");
3508 len
= le32_to_cpu(entryptr
->FileNameLength
);
3509 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
3510 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
3515 *lastentry
= (char *)entryptr
;
3518 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
3530 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
3531 u64 persistent_fid
, u64 volatile_fid
, int index
,
3532 struct cifs_search_info
*srch_inf
)
3534 struct smb_rqst rqst
;
3535 struct smb2_query_directory_req
*req
;
3536 struct smb2_query_directory_rsp
*rsp
= NULL
;
3538 struct kvec rsp_iov
;
3541 int resp_buftype
= CIFS_NO_BUFFER
;
3542 unsigned char *bufptr
;
3543 struct TCP_Server_Info
*server
;
3544 struct cifs_ses
*ses
= tcon
->ses
;
3545 __le16 asteriks
= cpu_to_le16('*');
3547 unsigned int output_size
= CIFSMaxBufSize
;
3548 size_t info_buf_size
;
3550 unsigned int total_len
;
3552 if (ses
&& (ses
->server
))
3553 server
= ses
->server
;
3557 rc
= smb2_plain_req_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
,
3562 if (smb3_encryption_required(tcon
))
3563 flags
|= CIFS_TRANSFORM_REQ
;
3565 switch (srch_inf
->info_level
) {
3566 case SMB_FIND_FILE_DIRECTORY_INFO
:
3567 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
3568 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
3570 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
3571 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
3572 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
3575 cifs_dbg(VFS
, "info level %u isn't supported\n",
3576 srch_inf
->info_level
);
3581 req
->FileIndex
= cpu_to_le32(index
);
3582 req
->PersistentFileId
= persistent_fid
;
3583 req
->VolatileFileId
= volatile_fid
;
3586 bufptr
= req
->Buffer
;
3587 memcpy(bufptr
, &asteriks
, len
);
3589 req
->FileNameOffset
=
3590 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1);
3591 req
->FileNameLength
= cpu_to_le16(len
);
3593 * BB could be 30 bytes or so longer if we used SMB2 specific
3594 * buffer lengths, but this is safe and close enough.
3596 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
3597 output_size
= min_t(unsigned int, output_size
, 2 << 15);
3598 req
->OutputBufferLength
= cpu_to_le32(output_size
);
3600 iov
[0].iov_base
= (char *)req
;
3602 iov
[0].iov_len
= total_len
- 1;
3604 iov
[1].iov_base
= (char *)(req
->Buffer
);
3605 iov
[1].iov_len
= len
;
3607 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3611 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3612 cifs_small_buf_release(req
);
3613 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
.iov_base
;
3616 if (rc
== -ENODATA
&&
3617 rsp
->sync_hdr
.Status
== STATUS_NO_MORE_FILES
) {
3618 srch_inf
->endOfSearch
= true;
3621 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
3625 rc
= validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
3626 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
3631 srch_inf
->unicode
= true;
3633 if (srch_inf
->ntwrk_buf_start
) {
3634 if (srch_inf
->smallBuf
)
3635 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
3637 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
3639 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
3640 srch_inf
->srch_entries_start
= srch_inf
->last_entry
=
3641 (char *)rsp
+ le16_to_cpu(rsp
->OutputBufferOffset
);
3642 end_of_smb
= rsp_iov
.iov_len
+ (char *)rsp
;
3643 srch_inf
->entries_in_buffer
=
3644 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
3645 &srch_inf
->last_entry
, info_buf_size
);
3646 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
3647 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
3648 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
3649 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
3650 if (resp_buftype
== CIFS_LARGE_BUFFER
)
3651 srch_inf
->smallBuf
= false;
3652 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
3653 srch_inf
->smallBuf
= true;
3655 cifs_dbg(VFS
, "illegal search buffer type\n");
3660 free_rsp_buf(resp_buftype
, rsp
);
3665 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3666 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, u8 info_class
,
3667 u8 info_type
, u32 additional_info
, unsigned int num
,
3668 void **data
, unsigned int *size
)
3670 struct smb_rqst rqst
;
3671 struct smb2_set_info_req
*req
;
3672 struct smb2_set_info_rsp
*rsp
= NULL
;
3674 struct kvec rsp_iov
;
3678 struct cifs_ses
*ses
= tcon
->ses
;
3680 unsigned int total_len
;
3682 if (!ses
|| !(ses
->server
))
3688 iov
= kmalloc_array(num
, sizeof(struct kvec
), GFP_KERNEL
);
3692 rc
= smb2_plain_req_init(SMB2_SET_INFO
, tcon
, (void **) &req
, &total_len
);
3698 if (smb3_encryption_required(tcon
))
3699 flags
|= CIFS_TRANSFORM_REQ
;
3701 req
->sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3703 req
->InfoType
= info_type
;
3704 req
->FileInfoClass
= info_class
;
3705 req
->PersistentFileId
= persistent_fid
;
3706 req
->VolatileFileId
= volatile_fid
;
3707 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
3710 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1);
3711 req
->BufferLength
= cpu_to_le32(*size
);
3713 memcpy(req
->Buffer
, *data
, *size
);
3716 iov
[0].iov_base
= (char *)req
;
3718 iov
[0].iov_len
= total_len
- 1;
3720 for (i
= 1; i
< num
; i
++) {
3721 le32_add_cpu(&req
->BufferLength
, size
[i
]);
3722 iov
[i
].iov_base
= (char *)data
[i
];
3723 iov
[i
].iov_len
= size
[i
];
3726 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3730 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
3732 cifs_buf_release(req
);
3733 rsp
= (struct smb2_set_info_rsp
*)rsp_iov
.iov_base
;
3736 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
3737 trace_smb3_set_info_err(xid
, persistent_fid
, tcon
->tid
,
3738 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
3741 free_rsp_buf(resp_buftype
, rsp
);
3747 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
3748 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3750 struct smb2_file_rename_info info
;
3752 unsigned int size
[2];
3754 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3756 data
= kmalloc_array(2, sizeof(void *), GFP_KERNEL
);
3760 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
3761 /* 0 = fail if target already exists */
3762 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3763 info
.FileNameLength
= cpu_to_le32(len
);
3766 size
[0] = sizeof(struct smb2_file_rename_info
);
3768 data
[1] = target_file
;
3769 size
[1] = len
+ 2 /* null */;
3771 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3772 current
->tgid
, FILE_RENAME_INFORMATION
, SMB2_O_INFO_FILE
,
3779 SMB2_rmdir(const unsigned int xid
, struct cifs_tcon
*tcon
,
3780 u64 persistent_fid
, u64 volatile_fid
)
3782 __u8 delete_pending
= 1;
3786 data
= &delete_pending
;
3787 size
= 1; /* sizeof __u8 */
3789 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3790 current
->tgid
, FILE_DISPOSITION_INFORMATION
, SMB2_O_INFO_FILE
,
3791 0, 1, &data
, &size
);
3795 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
3796 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3798 struct smb2_file_link_info info
;
3800 unsigned int size
[2];
3802 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3804 data
= kmalloc_array(2, sizeof(void *), GFP_KERNEL
);
3808 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
3809 /* 0 = fail if link already exists */
3810 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3811 info
.FileNameLength
= cpu_to_le32(len
);
3814 size
[0] = sizeof(struct smb2_file_link_info
);
3816 data
[1] = target_file
;
3817 size
[1] = len
+ 2 /* null */;
3819 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3820 current
->tgid
, FILE_LINK_INFORMATION
, SMB2_O_INFO_FILE
,
3827 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3828 u64 volatile_fid
, u32 pid
, __le64
*eof
, bool is_falloc
)
3830 struct smb2_file_eof_info info
;
3834 info
.EndOfFile
= *eof
;
3837 size
= sizeof(struct smb2_file_eof_info
);
3840 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3841 pid
, FILE_ALLOCATION_INFORMATION
, SMB2_O_INFO_FILE
,
3842 0, 1, &data
, &size
);
3844 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3845 pid
, FILE_END_OF_FILE_INFORMATION
, SMB2_O_INFO_FILE
,
3846 0, 1, &data
, &size
);
3850 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3851 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
3854 size
= sizeof(FILE_BASIC_INFO
);
3855 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3856 current
->tgid
, FILE_BASIC_INFORMATION
, SMB2_O_INFO_FILE
,
3857 0, 1, (void **)&buf
, &size
);
3861 SMB2_set_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
3862 u64 persistent_fid
, u64 volatile_fid
,
3863 struct cifs_ntsd
*pnntsd
, int pacllen
, int aclflag
)
3865 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3866 current
->tgid
, 0, SMB2_O_INFO_SECURITY
, aclflag
,
3867 1, (void **)&pnntsd
, &pacllen
);
3871 SMB2_set_ea(const unsigned int xid
, struct cifs_tcon
*tcon
,
3872 u64 persistent_fid
, u64 volatile_fid
,
3873 struct smb2_file_full_ea_info
*buf
, int len
)
3875 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3876 current
->tgid
, FILE_FULL_EA_INFORMATION
, SMB2_O_INFO_FILE
,
3877 0, 1, (void **)&buf
, &len
);
3881 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3882 const u64 persistent_fid
, const u64 volatile_fid
,
3885 struct smb_rqst rqst
;
3887 struct smb2_oplock_break
*req
= NULL
;
3888 struct cifs_ses
*ses
= tcon
->ses
;
3889 int flags
= CIFS_OBREAK_OP
;
3890 unsigned int total_len
;
3892 struct kvec rsp_iov
;
3895 cifs_dbg(FYI
, "SMB2_oplock_break\n");
3896 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
,
3901 if (smb3_encryption_required(tcon
))
3902 flags
|= CIFS_TRANSFORM_REQ
;
3904 req
->VolatileFid
= volatile_fid
;
3905 req
->PersistentFid
= persistent_fid
;
3906 req
->OplockLevel
= oplock_level
;
3907 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
3909 flags
|= CIFS_NO_RESP
;
3911 iov
[0].iov_base
= (char *)req
;
3912 iov
[0].iov_len
= total_len
;
3914 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3918 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
3919 cifs_small_buf_release(req
);
3922 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3923 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
3930 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
3931 struct kstatfs
*kst
)
3933 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
3934 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
3935 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
3936 kst
->f_bfree
= kst
->f_bavail
=
3937 le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
3942 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
3943 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
3945 struct TCP_Server_Info
*server
;
3947 struct smb2_query_info_req
*req
;
3948 unsigned int total_len
;
3950 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
3952 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
3955 server
= tcon
->ses
->server
;
3957 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
,
3962 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
3963 req
->FileInfoClass
= level
;
3964 req
->PersistentFileId
= persistent_fid
;
3965 req
->VolatileFileId
= volatile_fid
;
3967 req
->InputBufferOffset
=
3968 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1);
3969 req
->OutputBufferLength
= cpu_to_le32(
3970 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1);
3972 iov
->iov_base
= (char *)req
;
3973 iov
->iov_len
= total_len
;
3978 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3979 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
3981 struct smb_rqst rqst
;
3982 struct smb2_query_info_rsp
*rsp
= NULL
;
3984 struct kvec rsp_iov
;
3987 struct cifs_ses
*ses
= tcon
->ses
;
3988 struct smb2_fs_full_size_info
*info
= NULL
;
3991 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
3992 sizeof(struct smb2_fs_full_size_info
),
3993 persistent_fid
, volatile_fid
);
3997 if (smb3_encryption_required(tcon
))
3998 flags
|= CIFS_TRANSFORM_REQ
;
4000 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4004 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4005 cifs_small_buf_release(iov
.iov_base
);
4007 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4010 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4012 info
= (struct smb2_fs_full_size_info
*)(
4013 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
4014 rc
= validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
4015 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
4016 sizeof(struct smb2_fs_full_size_info
));
4018 copy_fs_info_to_kstatfs(info
, fsdata
);
4021 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4026 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
4027 u64 persistent_fid
, u64 volatile_fid
, int level
)
4029 struct smb_rqst rqst
;
4030 struct smb2_query_info_rsp
*rsp
= NULL
;
4032 struct kvec rsp_iov
;
4034 int resp_buftype
, max_len
, min_len
;
4035 struct cifs_ses
*ses
= tcon
->ses
;
4036 unsigned int rsp_len
, offset
;
4039 if (level
== FS_DEVICE_INFORMATION
) {
4040 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
4041 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
4042 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
4043 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
4044 min_len
= MIN_FS_ATTR_INFO_SIZE
;
4045 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
4046 max_len
= sizeof(struct smb3_fs_ss_info
);
4047 min_len
= sizeof(struct smb3_fs_ss_info
);
4049 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
4053 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
4054 persistent_fid
, volatile_fid
);
4058 if (smb3_encryption_required(tcon
))
4059 flags
|= CIFS_TRANSFORM_REQ
;
4061 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4065 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4066 cifs_small_buf_release(iov
.iov_base
);
4068 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4071 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4073 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
4074 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
4075 rc
= validate_iov(offset
, rsp_len
, &rsp_iov
, min_len
);
4079 if (level
== FS_ATTRIBUTE_INFORMATION
)
4080 memcpy(&tcon
->fsAttrInfo
, offset
4081 + (char *)rsp
, min_t(unsigned int,
4083 else if (level
== FS_DEVICE_INFORMATION
)
4084 memcpy(&tcon
->fsDevInfo
, offset
4085 + (char *)rsp
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
4086 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
4087 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
4088 (offset
+ (char *)rsp
);
4089 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
4090 tcon
->perf_sector_size
=
4091 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
4095 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4100 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
4101 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
4102 const __u32 num_lock
, struct smb2_lock_element
*buf
)
4104 struct smb_rqst rqst
;
4106 struct smb2_lock_req
*req
= NULL
;
4108 struct kvec rsp_iov
;
4111 int flags
= CIFS_NO_RESP
;
4112 unsigned int total_len
;
4114 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
4116 rc
= smb2_plain_req_init(SMB2_LOCK
, tcon
, (void **) &req
, &total_len
);
4120 if (smb3_encryption_required(tcon
))
4121 flags
|= CIFS_TRANSFORM_REQ
;
4123 req
->sync_hdr
.ProcessId
= cpu_to_le32(pid
);
4124 req
->LockCount
= cpu_to_le16(num_lock
);
4126 req
->PersistentFileId
= persist_fid
;
4127 req
->VolatileFileId
= volatile_fid
;
4129 count
= num_lock
* sizeof(struct smb2_lock_element
);
4131 iov
[0].iov_base
= (char *)req
;
4132 iov
[0].iov_len
= total_len
- sizeof(struct smb2_lock_element
);
4133 iov
[1].iov_base
= (char *)buf
;
4134 iov
[1].iov_len
= count
;
4136 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
4138 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4142 rc
= cifs_send_recv(xid
, tcon
->ses
, &rqst
, &resp_buf_type
, flags
,
4144 cifs_small_buf_release(req
);
4146 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
4147 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
4148 trace_smb3_lock_err(xid
, persist_fid
, tcon
->tid
,
4149 tcon
->ses
->Suid
, rc
);
4156 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
4157 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
4158 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
4161 struct smb2_lock_element lock
;
4163 lock
.Offset
= cpu_to_le64(offset
);
4164 lock
.Length
= cpu_to_le64(length
);
4165 lock
.Flags
= cpu_to_le32(lock_flags
);
4166 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
4167 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
4169 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
4173 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
4174 __u8
*lease_key
, const __le32 lease_state
)
4176 struct smb_rqst rqst
;
4178 struct smb2_lease_ack
*req
= NULL
;
4179 struct cifs_ses
*ses
= tcon
->ses
;
4180 int flags
= CIFS_OBREAK_OP
;
4181 unsigned int total_len
;
4183 struct kvec rsp_iov
;
4186 cifs_dbg(FYI
, "SMB2_lease_break\n");
4187 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
,
4192 if (smb3_encryption_required(tcon
))
4193 flags
|= CIFS_TRANSFORM_REQ
;
4195 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
4196 req
->StructureSize
= cpu_to_le16(36);
4199 memcpy(req
->LeaseKey
, lease_key
, 16);
4200 req
->LeaseState
= lease_state
;
4202 flags
|= CIFS_NO_RESP
;
4204 iov
[0].iov_base
= (char *)req
;
4205 iov
[0].iov_len
= total_len
;
4207 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4211 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
4212 cifs_small_buf_release(req
);
4215 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
4216 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);