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"
53 #ifdef CONFIG_CIFS_DFS_UPCALL
54 #include "dfs_cache.h"
58 * The following table defines the expected "StructureSize" of SMB2 requests
59 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
61 * Note that commands are defined in smb2pdu.h in le16 but the array below is
62 * indexed by command in host byte order.
64 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
65 /* SMB2_NEGOTIATE */ 36,
66 /* SMB2_SESSION_SETUP */ 25,
68 /* SMB2_TREE_CONNECT */ 9,
69 /* SMB2_TREE_DISCONNECT */ 4,
79 /* SMB2_QUERY_DIRECTORY */ 33,
80 /* SMB2_CHANGE_NOTIFY */ 32,
81 /* SMB2_QUERY_INFO */ 41,
82 /* SMB2_SET_INFO */ 33,
83 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
86 int smb3_encryption_required(const struct cifs_tcon
*tcon
)
90 if ((tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
) ||
91 (tcon
->share_flags
& SHI1005_FLAGS_ENCRYPT_DATA
))
94 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
100 smb2_hdr_assemble(struct smb2_sync_hdr
*shdr
, __le16 smb2_cmd
,
101 const struct cifs_tcon
*tcon
)
103 shdr
->ProtocolId
= SMB2_PROTO_NUMBER
;
104 shdr
->StructureSize
= cpu_to_le16(64);
105 shdr
->Command
= smb2_cmd
;
106 if (tcon
&& tcon
->ses
&& tcon
->ses
->server
) {
107 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
109 spin_lock(&server
->req_lock
);
110 /* Request up to 10 credits but don't go over the limit. */
111 if (server
->credits
>= server
->max_credits
)
112 shdr
->CreditRequest
= cpu_to_le16(0);
114 shdr
->CreditRequest
= cpu_to_le16(
115 min_t(int, server
->max_credits
-
116 server
->credits
, 10));
117 spin_unlock(&server
->req_lock
);
119 shdr
->CreditRequest
= cpu_to_le16(2);
121 shdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
126 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
127 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
128 if ((tcon
->ses
) && (tcon
->ses
->server
) &&
129 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
130 shdr
->CreditCharge
= cpu_to_le16(1);
131 /* else CreditCharge MBZ */
133 shdr
->TreeId
= tcon
->tid
;
134 /* Uid is not converted */
136 shdr
->SessionId
= tcon
->ses
->Suid
;
139 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
140 * to pass the path on the Open SMB prefixed by \\server\share.
141 * Not sure when we would need to do the augmented path (if ever) and
142 * setting this flag breaks the SMB2 open operation since it is
143 * illegal to send an empty path name (without \\server\share prefix)
144 * when the DFS flag is set in the SMB open header. We could
145 * consider setting the flag on all operations other than open
146 * but it is safer to net set it for now.
148 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
149 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
151 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
&&
152 !smb3_encryption_required(tcon
))
153 shdr
->Flags
|= SMB2_FLAGS_SIGNED
;
158 #ifdef CONFIG_CIFS_DFS_UPCALL
159 static int __smb2_reconnect(const struct nls_table
*nlsc
,
160 struct cifs_tcon
*tcon
)
163 struct dfs_cache_tgt_list tl
;
164 struct dfs_cache_tgt_iterator
*it
= NULL
;
166 const char *tcp_host
;
168 const char *dfs_host
;
171 tree
= kzalloc(MAX_TREE_SIZE
, GFP_KERNEL
);
176 scnprintf(tree
, MAX_TREE_SIZE
, "\\\\%s\\IPC$",
177 tcon
->ses
->server
->hostname
);
178 rc
= SMB2_tcon(0, tcon
->ses
, tree
, tcon
, nlsc
);
182 if (!tcon
->dfs_path
) {
183 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nlsc
);
187 rc
= dfs_cache_noreq_find(tcon
->dfs_path
+ 1, NULL
, &tl
);
191 extract_unc_hostname(tcon
->ses
->server
->hostname
, &tcp_host
,
194 for (it
= dfs_cache_get_tgt_iterator(&tl
); it
;
195 it
= dfs_cache_get_next_tgt(&tl
, it
)) {
196 const char *tgt
= dfs_cache_get_tgt_name(it
);
198 extract_unc_hostname(tgt
, &dfs_host
, &dfs_host_len
);
200 if (dfs_host_len
!= tcp_host_len
201 || strncasecmp(dfs_host
, tcp_host
, dfs_host_len
) != 0) {
202 cifs_dbg(FYI
, "%s: skipping %.*s, doesn't match %.*s",
204 (int)dfs_host_len
, dfs_host
,
205 (int)tcp_host_len
, tcp_host
);
209 scnprintf(tree
, MAX_TREE_SIZE
, "\\%s", tgt
);
211 rc
= SMB2_tcon(0, tcon
->ses
, tree
, tcon
, nlsc
);
220 rc
= dfs_cache_noreq_update_tgthint(tcon
->dfs_path
+ 1,
225 dfs_cache_free_tgts(&tl
);
231 static inline int __smb2_reconnect(const struct nls_table
*nlsc
,
232 struct cifs_tcon
*tcon
)
234 return SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nlsc
);
239 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
242 struct nls_table
*nls_codepage
;
243 struct cifs_ses
*ses
;
244 struct TCP_Server_Info
*server
;
248 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
249 * check for tcp and smb session status done differently
250 * for those three - in the calling routine.
255 if (smb2_command
== SMB2_TREE_CONNECT
)
258 if (tcon
->tidStatus
== CifsExiting
) {
260 * only tree disconnect, open, and write,
261 * (and ulogoff which does not have tcon)
262 * are allowed as we start force umount.
264 if ((smb2_command
!= SMB2_WRITE
) &&
265 (smb2_command
!= SMB2_CREATE
) &&
266 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
267 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
272 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
273 (!tcon
->ses
->server
))
277 server
= ses
->server
;
279 retries
= server
->nr_targets
;
282 * Give demultiplex thread up to 10 seconds to each target available for
283 * reconnect -- should be greater than cifs socket timeout which is 7
286 while (server
->tcpStatus
== CifsNeedReconnect
) {
288 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
289 * here since they are implicitly done when session drops.
291 switch (smb2_command
) {
293 * BB Should we keep oplock break and add flush to exceptions?
295 case SMB2_TREE_DISCONNECT
:
298 case SMB2_OPLOCK_BREAK
:
302 rc
= wait_event_interruptible_timeout(server
->response_q
,
303 (server
->tcpStatus
!= CifsNeedReconnect
),
306 cifs_dbg(FYI
, "%s: aborting reconnect due to a received"
307 " signal by the process\n", __func__
);
311 /* are we still trying to reconnect? */
312 if (server
->tcpStatus
!= CifsNeedReconnect
)
319 * on "soft" mounts we wait once. Hard mounts keep
320 * retrying until process is killed or server comes
324 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
327 retries
= server
->nr_targets
;
330 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
333 nls_codepage
= load_nls_default();
336 * need to prevent multiple threads trying to simultaneously reconnect
337 * the same SMB session
339 mutex_lock(&tcon
->ses
->session_mutex
);
342 * Recheck after acquire mutex. If another thread is negotiating
343 * and the server never sends an answer the socket will be closed
344 * and tcpStatus set to reconnect.
346 if (server
->tcpStatus
== CifsNeedReconnect
) {
348 mutex_unlock(&tcon
->ses
->session_mutex
);
352 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
353 if (!rc
&& tcon
->ses
->need_reconnect
)
354 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
356 if (rc
|| !tcon
->need_reconnect
) {
357 mutex_unlock(&tcon
->ses
->session_mutex
);
361 cifs_mark_open_files_invalid(tcon
);
362 if (tcon
->use_persistent
)
363 tcon
->need_reopen_files
= true;
365 rc
= __smb2_reconnect(nls_codepage
, tcon
);
366 mutex_unlock(&tcon
->ses
->session_mutex
);
368 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
370 /* If sess reconnected but tcon didn't, something strange ... */
371 printk_once(KERN_WARNING
"reconnect tcon failed rc = %d\n", rc
);
375 if (smb2_command
!= SMB2_INTERNAL_CMD
)
376 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
378 atomic_inc(&tconInfoReconnectCount
);
381 * Check if handle based operation so we know whether we can continue
382 * or not without returning to caller to reset file handle.
385 * BB Is flush done by server on drop of tcp session? Should we special
386 * case it and skip above?
388 switch (smb2_command
) {
394 case SMB2_QUERY_DIRECTORY
:
395 case SMB2_CHANGE_NOTIFY
:
396 case SMB2_QUERY_INFO
:
400 unload_nls(nls_codepage
);
405 fill_small_buf(__le16 smb2_command
, struct cifs_tcon
*tcon
, void *buf
,
406 unsigned int *total_len
)
408 struct smb2_sync_pdu
*spdu
= (struct smb2_sync_pdu
*)buf
;
409 /* lookup word count ie StructureSize from table */
410 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_command
)];
413 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
414 * largest operations (Create)
418 smb2_hdr_assemble(&spdu
->sync_hdr
, smb2_command
, tcon
);
419 spdu
->StructureSize2
= cpu_to_le16(parmsize
);
421 *total_len
= parmsize
+ sizeof(struct smb2_sync_hdr
);
425 * Allocate and return pointer to an SMB request hdr, and set basic
426 * SMB information in the SMB header. If the return code is zero, this
427 * function must have filled in request_buf pointer.
430 smb2_plain_req_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
431 void **request_buf
, unsigned int *total_len
)
435 rc
= smb2_reconnect(smb2_command
, tcon
);
439 /* BB eventually switch this to SMB2 specific small buf size */
440 if (smb2_command
== SMB2_SET_INFO
)
441 *request_buf
= cifs_buf_get();
443 *request_buf
= cifs_small_buf_get();
444 if (*request_buf
== NULL
) {
445 /* BB should we add a retry in here if not a writepage? */
449 fill_small_buf(smb2_command
, tcon
,
450 (struct smb2_sync_hdr
*)(*request_buf
),
454 uint16_t com_code
= le16_to_cpu(smb2_command
);
455 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
456 cifs_stats_inc(&tcon
->num_smbs_sent
);
463 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
464 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
465 #define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100)
468 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
470 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
471 pneg_ctxt
->DataLength
= cpu_to_le16(38);
472 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
473 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
474 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
475 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
479 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
481 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
482 pneg_ctxt
->DataLength
= cpu_to_le16(4); /* Cipher Count + le16 cipher */
483 pneg_ctxt
->CipherCount
= cpu_to_le16(1);
484 /* pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;*/ /* not supported yet */
485 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_CCM
;
489 build_posix_ctxt(struct smb2_posix_neg_context
*pneg_ctxt
)
491 pneg_ctxt
->ContextType
= SMB2_POSIX_EXTENSIONS_AVAILABLE
;
492 pneg_ctxt
->DataLength
= cpu_to_le16(POSIX_CTXT_DATA_LEN
);
493 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
494 pneg_ctxt
->Name
[0] = 0x93;
495 pneg_ctxt
->Name
[1] = 0xAD;
496 pneg_ctxt
->Name
[2] = 0x25;
497 pneg_ctxt
->Name
[3] = 0x50;
498 pneg_ctxt
->Name
[4] = 0x9C;
499 pneg_ctxt
->Name
[5] = 0xB4;
500 pneg_ctxt
->Name
[6] = 0x11;
501 pneg_ctxt
->Name
[7] = 0xE7;
502 pneg_ctxt
->Name
[8] = 0xB4;
503 pneg_ctxt
->Name
[9] = 0x23;
504 pneg_ctxt
->Name
[10] = 0x83;
505 pneg_ctxt
->Name
[11] = 0xDE;
506 pneg_ctxt
->Name
[12] = 0x96;
507 pneg_ctxt
->Name
[13] = 0x8B;
508 pneg_ctxt
->Name
[14] = 0xCD;
509 pneg_ctxt
->Name
[15] = 0x7C;
513 assemble_neg_contexts(struct smb2_negotiate_req
*req
,
514 unsigned int *total_len
)
516 char *pneg_ctxt
= (char *)req
;
517 unsigned int ctxt_len
;
519 if (*total_len
> 200) {
520 /* In case length corrupted don't want to overrun smb buffer */
521 cifs_dbg(VFS
, "Bad frame length assembling neg contexts\n");
526 * round up total_len of fixed part of SMB3 negotiate request to 8
527 * byte boundary before adding negotiate contexts
529 *total_len
= roundup(*total_len
, 8);
531 pneg_ctxt
= (*total_len
) + (char *)req
;
532 req
->NegotiateContextOffset
= cpu_to_le32(*total_len
);
534 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
535 ctxt_len
= DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context
), 8) * 8;
536 *total_len
+= ctxt_len
;
537 pneg_ctxt
+= ctxt_len
;
539 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
540 ctxt_len
= DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context
), 8) * 8;
541 *total_len
+= ctxt_len
;
542 pneg_ctxt
+= ctxt_len
;
544 build_posix_ctxt((struct smb2_posix_neg_context
*)pneg_ctxt
);
545 *total_len
+= sizeof(struct smb2_posix_neg_context
);
547 req
->NegotiateContextCount
= cpu_to_le16(3);
550 static void decode_preauth_context(struct smb2_preauth_neg_context
*ctxt
)
552 unsigned int len
= le16_to_cpu(ctxt
->DataLength
);
554 /* If invalid preauth context warn but use what we requested, SHA-512 */
555 if (len
< MIN_PREAUTH_CTXT_DATA_LEN
) {
556 printk_once(KERN_WARNING
"server sent bad preauth context\n");
559 if (le16_to_cpu(ctxt
->HashAlgorithmCount
) != 1)
560 printk_once(KERN_WARNING
"illegal SMB3 hash algorithm count\n");
561 if (ctxt
->HashAlgorithms
!= SMB2_PREAUTH_INTEGRITY_SHA512
)
562 printk_once(KERN_WARNING
"unknown SMB3 hash algorithm\n");
565 static int decode_encrypt_ctx(struct TCP_Server_Info
*server
,
566 struct smb2_encryption_neg_context
*ctxt
)
568 unsigned int len
= le16_to_cpu(ctxt
->DataLength
);
570 cifs_dbg(FYI
, "decode SMB3.11 encryption neg context of len %d\n", len
);
571 if (len
< MIN_ENCRYPT_CTXT_DATA_LEN
) {
572 printk_once(KERN_WARNING
"server sent bad crypto ctxt len\n");
576 if (le16_to_cpu(ctxt
->CipherCount
) != 1) {
577 printk_once(KERN_WARNING
"illegal SMB3.11 cipher count\n");
580 cifs_dbg(FYI
, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt
->Ciphers
[0]));
581 if ((ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES128_CCM
) &&
582 (ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES128_GCM
)) {
583 printk_once(KERN_WARNING
"invalid SMB3.11 cipher returned\n");
586 server
->cipher_type
= ctxt
->Ciphers
[0];
587 server
->capabilities
|= SMB2_GLOBAL_CAP_ENCRYPTION
;
591 static int smb311_decode_neg_context(struct smb2_negotiate_rsp
*rsp
,
592 struct TCP_Server_Info
*server
,
593 unsigned int len_of_smb
)
595 struct smb2_neg_context
*pctx
;
596 unsigned int offset
= le32_to_cpu(rsp
->NegotiateContextOffset
);
597 unsigned int ctxt_cnt
= le16_to_cpu(rsp
->NegotiateContextCount
);
598 unsigned int len_of_ctxts
, i
;
601 cifs_dbg(FYI
, "decoding %d negotiate contexts\n", ctxt_cnt
);
602 if (len_of_smb
<= offset
) {
603 cifs_dbg(VFS
, "Invalid response: negotiate context offset\n");
607 len_of_ctxts
= len_of_smb
- offset
;
609 for (i
= 0; i
< ctxt_cnt
; i
++) {
611 /* check that offset is not beyond end of SMB */
612 if (len_of_ctxts
== 0)
615 if (len_of_ctxts
< sizeof(struct smb2_neg_context
))
618 pctx
= (struct smb2_neg_context
*)(offset
+ (char *)rsp
);
619 clen
= le16_to_cpu(pctx
->DataLength
);
620 if (clen
> len_of_ctxts
)
623 if (pctx
->ContextType
== SMB2_PREAUTH_INTEGRITY_CAPABILITIES
)
624 decode_preauth_context(
625 (struct smb2_preauth_neg_context
*)pctx
);
626 else if (pctx
->ContextType
== SMB2_ENCRYPTION_CAPABILITIES
)
627 rc
= decode_encrypt_ctx(server
,
628 (struct smb2_encryption_neg_context
*)pctx
);
629 else if (pctx
->ContextType
== SMB2_POSIX_EXTENSIONS_AVAILABLE
)
630 server
->posix_ext_supported
= true;
632 cifs_dbg(VFS
, "unknown negcontext of type %d ignored\n",
633 le16_to_cpu(pctx
->ContextType
));
637 /* offsets must be 8 byte aligned */
638 clen
= (clen
+ 7) & ~0x7;
639 offset
+= clen
+ sizeof(struct smb2_neg_context
);
640 len_of_ctxts
-= clen
;
645 static struct create_posix
*
646 create_posix_buf(umode_t mode
)
648 struct create_posix
*buf
;
650 buf
= kzalloc(sizeof(struct create_posix
),
655 buf
->ccontext
.DataOffset
=
656 cpu_to_le16(offsetof(struct create_posix
, Mode
));
657 buf
->ccontext
.DataLength
= cpu_to_le32(4);
658 buf
->ccontext
.NameOffset
=
659 cpu_to_le16(offsetof(struct create_posix
, Name
));
660 buf
->ccontext
.NameLength
= cpu_to_le16(16);
662 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
673 buf
->Name
[10] = 0x83;
674 buf
->Name
[11] = 0xDE;
675 buf
->Name
[12] = 0x96;
676 buf
->Name
[13] = 0x8B;
677 buf
->Name
[14] = 0xCD;
678 buf
->Name
[15] = 0x7C;
679 buf
->Mode
= cpu_to_le32(mode
);
680 cifs_dbg(FYI
, "mode on posix create 0%o", mode
);
685 add_posix_context(struct kvec
*iov
, unsigned int *num_iovec
, umode_t mode
)
687 struct smb2_create_req
*req
= iov
[0].iov_base
;
688 unsigned int num
= *num_iovec
;
690 iov
[num
].iov_base
= create_posix_buf(mode
);
691 if (iov
[num
].iov_base
== NULL
)
693 iov
[num
].iov_len
= sizeof(struct create_posix
);
694 if (!req
->CreateContextsOffset
)
695 req
->CreateContextsOffset
= cpu_to_le32(
696 sizeof(struct smb2_create_req
) +
697 iov
[num
- 1].iov_len
);
698 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_posix
));
699 *num_iovec
= num
+ 1;
706 * SMB2 Worker functions follow:
708 * The general structure of the worker functions is:
709 * 1) Call smb2_init (assembles SMB2 header)
710 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
711 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
712 * 4) Decode SMB2 command specific fields in the fixed length area
713 * 5) Decode variable length data area (if any for this SMB2 command type)
714 * 6) Call free smb buffer
720 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
722 struct smb_rqst rqst
;
723 struct smb2_negotiate_req
*req
;
724 struct smb2_negotiate_rsp
*rsp
;
729 struct TCP_Server_Info
*server
= ses
->server
;
730 int blob_offset
, blob_length
;
732 int flags
= CIFS_NEG_OP
;
733 unsigned int total_len
;
735 cifs_dbg(FYI
, "Negotiate protocol\n");
738 WARN(1, "%s: server is NULL!\n", __func__
);
742 rc
= smb2_plain_req_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
, &total_len
);
746 req
->sync_hdr
.SessionId
= 0;
748 memset(server
->preauth_sha_hash
, 0, SMB2_PREAUTH_HASH_SIZE
);
749 memset(ses
->preauth_sha_hash
, 0, SMB2_PREAUTH_HASH_SIZE
);
751 if (strcmp(ses
->server
->vals
->version_string
,
752 SMB3ANY_VERSION_STRING
) == 0) {
753 req
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
754 req
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
755 req
->DialectCount
= cpu_to_le16(2);
757 } else if (strcmp(ses
->server
->vals
->version_string
,
758 SMBDEFAULT_VERSION_STRING
) == 0) {
759 req
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
760 req
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
761 req
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
762 req
->Dialects
[3] = cpu_to_le16(SMB311_PROT_ID
);
763 req
->DialectCount
= cpu_to_le16(4);
766 /* otherwise send specific dialect */
767 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
768 req
->DialectCount
= cpu_to_le16(1);
772 /* only one of SMB2 signing flags may be set in SMB2 request */
774 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
775 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
776 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
778 req
->SecurityMode
= 0;
780 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
782 /* ClientGUID must be zero for SMB2.02 dialect */
783 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
784 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
786 memcpy(req
->ClientGUID
, server
->client_guid
,
787 SMB2_CLIENT_GUID_SIZE
);
788 if ((ses
->server
->vals
->protocol_id
== SMB311_PROT_ID
) ||
789 (strcmp(ses
->server
->vals
->version_string
,
790 SMBDEFAULT_VERSION_STRING
) == 0))
791 assemble_neg_contexts(req
, &total_len
);
793 iov
[0].iov_base
= (char *)req
;
794 iov
[0].iov_len
= total_len
;
796 memset(&rqst
, 0, sizeof(struct smb_rqst
));
800 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
801 cifs_small_buf_release(req
);
802 rsp
= (struct smb2_negotiate_rsp
*)rsp_iov
.iov_base
;
804 * No tcon so can't do
805 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
807 if (rc
== -EOPNOTSUPP
) {
808 cifs_dbg(VFS
, "Dialect not supported by server. Consider "
809 "specifying vers=1.0 or vers=2.0 on mount for accessing"
815 if (strcmp(ses
->server
->vals
->version_string
,
816 SMB3ANY_VERSION_STRING
) == 0) {
817 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
819 "SMB2 dialect returned but not requested\n");
821 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
823 "SMB2.1 dialect returned but not requested\n");
826 } else if (strcmp(ses
->server
->vals
->version_string
,
827 SMBDEFAULT_VERSION_STRING
) == 0) {
828 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
830 "SMB2 dialect returned but not requested\n");
832 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
833 /* ops set to 3.0 by default for default so update */
834 ses
->server
->ops
= &smb21_operations
;
835 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
836 ses
->server
->ops
= &smb311_operations
;
837 } else if (le16_to_cpu(rsp
->DialectRevision
) !=
838 ses
->server
->vals
->protocol_id
) {
839 /* if requested single dialect ensure returned dialect matched */
840 cifs_dbg(VFS
, "Illegal 0x%x dialect returned: not requested\n",
841 le16_to_cpu(rsp
->DialectRevision
));
845 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
847 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
848 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
849 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
850 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
851 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
852 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
853 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
854 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
855 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
856 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
858 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
859 le16_to_cpu(rsp
->DialectRevision
));
863 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
866 * Keep a copy of the hash after negprot. This hash will be
867 * the starting hash value for all sessions made from this
870 memcpy(server
->preauth_sha_hash
, ses
->preauth_sha_hash
,
871 SMB2_PREAUTH_HASH_SIZE
);
873 /* SMB2 only has an extended negflavor */
874 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
875 /* set it to the maximum buffer size value we can send with 1 credit */
876 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
877 SMB2_MAX_BUFFER_SIZE
);
878 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
879 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
880 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
881 if ((server
->sec_mode
& SMB2_SEC_MODE_FLAGS_ALL
) != server
->sec_mode
)
882 cifs_dbg(FYI
, "Server returned unexpected security mode 0x%x\n",
884 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
886 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
888 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
889 (struct smb2_sync_hdr
*)rsp
);
891 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
893 * ses->sectype = RawNTLMSSP;
894 * but for time being this is our only auth choice so doesn't matter.
895 * We just found a server which sets blob length to zero expecting raw.
897 if (blob_length
== 0) {
898 cifs_dbg(FYI
, "missing security blob on negprot\n");
899 server
->sec_ntlmssp
= true;
902 rc
= cifs_enable_signing(server
, ses
->sign
);
906 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
913 if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
)) {
914 if (rsp
->NegotiateContextCount
)
915 rc
= smb311_decode_neg_context(rsp
, server
,
918 cifs_dbg(VFS
, "Missing expected negotiate contexts\n");
921 free_rsp_buf(resp_buftype
, rsp
);
925 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
928 struct validate_negotiate_info_req
*pneg_inbuf
;
929 struct validate_negotiate_info_rsp
*pneg_rsp
= NULL
;
931 u32 inbuflen
; /* max of 4 dialects */
933 cifs_dbg(FYI
, "validate negotiate\n");
935 /* In SMB3.11 preauth integrity supersedes validate negotiate */
936 if (tcon
->ses
->server
->dialect
== SMB311_PROT_ID
)
940 * validation ioctl must be signed, so no point sending this if we
941 * can not sign it (ie are not known user). Even if signing is not
942 * required (enabled but not negotiated), in those cases we selectively
943 * sign just this, the first and only signed request on a connection.
944 * Having validation of negotiate info helps reduce attack vectors.
946 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
)
947 return 0; /* validation requires signing */
949 if (tcon
->ses
->user_name
== NULL
) {
950 cifs_dbg(FYI
, "Can't validate negotiate: null user mount\n");
951 return 0; /* validation requires signing */
954 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_NULL
)
955 cifs_dbg(VFS
, "Unexpected null user (anonymous) auth flag sent by server\n");
957 pneg_inbuf
= kmalloc(sizeof(*pneg_inbuf
), GFP_NOFS
);
961 pneg_inbuf
->Capabilities
=
962 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
963 memcpy(pneg_inbuf
->Guid
, tcon
->ses
->server
->client_guid
,
964 SMB2_CLIENT_GUID_SIZE
);
967 pneg_inbuf
->SecurityMode
=
968 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
969 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
970 pneg_inbuf
->SecurityMode
=
971 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
973 pneg_inbuf
->SecurityMode
= 0;
976 if (strcmp(tcon
->ses
->server
->vals
->version_string
,
977 SMB3ANY_VERSION_STRING
) == 0) {
978 pneg_inbuf
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
979 pneg_inbuf
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
980 pneg_inbuf
->DialectCount
= cpu_to_le16(2);
981 /* structure is big enough for 3 dialects, sending only 2 */
982 inbuflen
= sizeof(*pneg_inbuf
) -
983 (2 * sizeof(pneg_inbuf
->Dialects
[0]));
984 } else if (strcmp(tcon
->ses
->server
->vals
->version_string
,
985 SMBDEFAULT_VERSION_STRING
) == 0) {
986 pneg_inbuf
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
987 pneg_inbuf
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
988 pneg_inbuf
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
989 pneg_inbuf
->Dialects
[3] = cpu_to_le16(SMB311_PROT_ID
);
990 pneg_inbuf
->DialectCount
= cpu_to_le16(4);
991 /* structure is big enough for 3 dialects */
992 inbuflen
= sizeof(*pneg_inbuf
);
994 /* otherwise specific dialect was requested */
995 pneg_inbuf
->Dialects
[0] =
996 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
997 pneg_inbuf
->DialectCount
= cpu_to_le16(1);
998 /* structure is big enough for 3 dialects, sending only 1 */
999 inbuflen
= sizeof(*pneg_inbuf
) -
1000 sizeof(pneg_inbuf
->Dialects
[0]) * 2;
1003 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
1004 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
1005 (char *)pneg_inbuf
, inbuflen
, CIFSMaxBufSize
,
1006 (char **)&pneg_rsp
, &rsplen
);
1007 if (rc
== -EOPNOTSUPP
) {
1009 * Old Windows versions or Netapp SMB server can return
1010 * not supported error. Client should accept it.
1012 cifs_dbg(VFS
, "Server does not support validate negotiate\n");
1014 } else if (rc
!= 0) {
1015 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
1017 goto out_free_inbuf
;
1021 if (rsplen
!= sizeof(*pneg_rsp
)) {
1022 cifs_dbg(VFS
, "invalid protocol negotiate response size: %d\n",
1025 /* relax check since Mac returns max bufsize allowed on ioctl */
1026 if (rsplen
> CIFSMaxBufSize
|| rsplen
< sizeof(*pneg_rsp
))
1030 /* check validate negotiate info response matches what we got earlier */
1031 if (pneg_rsp
->Dialect
!= cpu_to_le16(tcon
->ses
->server
->dialect
))
1034 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
1037 /* do not validate server guid because not saved at negprot time yet */
1039 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
1040 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
1043 /* validate negotiate successful */
1045 cifs_dbg(FYI
, "validate negotiate info successful\n");
1049 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
1058 smb2_select_sectype(struct TCP_Server_Info
*server
, enum securityEnum requested
)
1060 switch (requested
) {
1067 if (server
->sec_ntlmssp
&&
1068 (global_secflags
& CIFSSEC_MAY_NTLMSSP
))
1070 if ((server
->sec_kerberos
|| server
->sec_mskerberos
) &&
1071 (global_secflags
& CIFSSEC_MAY_KRB5
))
1079 struct SMB2_sess_data
{
1081 struct cifs_ses
*ses
;
1082 struct nls_table
*nls_cp
;
1083 void (*func
)(struct SMB2_sess_data
*);
1085 u64 previous_session
;
1087 /* we will send the SMB in three pieces:
1088 * a fixed length beginning part, an optional
1089 * SPNEGO blob (which can be zero length), and a
1090 * last part which will include the strings
1091 * and rest of bcc area. This allows us to avoid
1092 * a large buffer 17K allocation
1099 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
1102 struct cifs_ses
*ses
= sess_data
->ses
;
1103 struct smb2_sess_setup_req
*req
;
1104 struct TCP_Server_Info
*server
= ses
->server
;
1105 unsigned int total_len
;
1107 rc
= smb2_plain_req_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
,
1112 /* First session, not a reauthenticate */
1113 req
->sync_hdr
.SessionId
= 0;
1115 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
1116 req
->PreviousSessionId
= sess_data
->previous_session
;
1118 req
->Flags
= 0; /* MBZ */
1120 /* enough to enable echos and oplocks and one max size write */
1121 req
->sync_hdr
.CreditRequest
= cpu_to_le16(130);
1123 /* only one of SMB2 signing flags may be set in SMB2 request */
1125 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
1126 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
1127 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
1129 req
->SecurityMode
= 0;
1131 req
->Capabilities
= 0;
1132 req
->Channel
= 0; /* MBZ */
1134 sess_data
->iov
[0].iov_base
= (char *)req
;
1136 sess_data
->iov
[0].iov_len
= total_len
- 1;
1138 * This variable will be used to clear the buffer
1139 * allocated above in case of any error in the calling function.
1141 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
1147 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
1149 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
1150 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1154 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
1157 struct smb_rqst rqst
;
1158 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
1159 struct kvec rsp_iov
= { NULL
, 0 };
1161 /* Testing shows that buffer offset must be at location of Buffer[0] */
1162 req
->SecurityBufferOffset
=
1163 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) - 1 /* pad */);
1164 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
1166 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1167 rqst
.rq_iov
= sess_data
->iov
;
1170 /* BB add code to build os and lm fields */
1171 rc
= cifs_send_recv(sess_data
->xid
, sess_data
->ses
,
1173 &sess_data
->buf0_type
,
1174 CIFS_LOG_ERROR
| CIFS_NEG_OP
, &rsp_iov
);
1175 cifs_small_buf_release(sess_data
->iov
[0].iov_base
);
1176 memcpy(&sess_data
->iov
[0], &rsp_iov
, sizeof(struct kvec
));
1182 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
1185 struct cifs_ses
*ses
= sess_data
->ses
;
1187 mutex_lock(&ses
->server
->srv_mutex
);
1188 if (ses
->server
->ops
->generate_signingkey
) {
1189 rc
= ses
->server
->ops
->generate_signingkey(ses
);
1192 "SMB3 session key generation failed\n");
1193 mutex_unlock(&ses
->server
->srv_mutex
);
1197 if (!ses
->server
->session_estab
) {
1198 ses
->server
->sequence_number
= 0x2;
1199 ses
->server
->session_estab
= true;
1201 mutex_unlock(&ses
->server
->srv_mutex
);
1203 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
1204 spin_lock(&GlobalMid_Lock
);
1205 ses
->status
= CifsGood
;
1206 ses
->need_reconnect
= false;
1207 spin_unlock(&GlobalMid_Lock
);
1211 #ifdef CONFIG_CIFS_UPCALL
1213 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1216 struct cifs_ses
*ses
= sess_data
->ses
;
1217 struct cifs_spnego_msg
*msg
;
1218 struct key
*spnego_key
= NULL
;
1219 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1221 rc
= SMB2_sess_alloc_buffer(sess_data
);
1225 spnego_key
= cifs_get_spnego_key(ses
);
1226 if (IS_ERR(spnego_key
)) {
1227 rc
= PTR_ERR(spnego_key
);
1232 msg
= spnego_key
->payload
.data
[0];
1234 * check version field to make sure that cifs.upcall is
1235 * sending us a response in an expected form
1237 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
1239 "bad cifs.upcall version. Expected %d got %d",
1240 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
1242 goto out_put_spnego_key
;
1245 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
1247 if (!ses
->auth_key
.response
) {
1249 "Kerberos can't allocate (%u bytes) memory",
1252 goto out_put_spnego_key
;
1254 ses
->auth_key
.len
= msg
->sesskey_len
;
1256 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
1257 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
1259 rc
= SMB2_sess_sendreceive(sess_data
);
1261 goto out_put_spnego_key
;
1263 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1264 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1266 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1268 rc
= SMB2_sess_establish_session(sess_data
);
1270 key_invalidate(spnego_key
);
1271 key_put(spnego_key
);
1273 sess_data
->result
= rc
;
1274 sess_data
->func
= NULL
;
1275 SMB2_sess_free_buffer(sess_data
);
1279 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1281 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
1282 sess_data
->result
= -EOPNOTSUPP
;
1283 sess_data
->func
= NULL
;
1288 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
1291 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
1294 struct cifs_ses
*ses
= sess_data
->ses
;
1295 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1296 char *ntlmssp_blob
= NULL
;
1297 bool use_spnego
= false; /* else use raw ntlmssp */
1298 u16 blob_length
= 0;
1301 * If memory allocation is successful, caller of this function
1304 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
1305 if (!ses
->ntlmssp
) {
1309 ses
->ntlmssp
->sesskey_per_smbsess
= true;
1311 rc
= SMB2_sess_alloc_buffer(sess_data
);
1315 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
1317 if (ntlmssp_blob
== NULL
) {
1322 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
1324 /* BB eventually need to add this */
1325 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1329 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
1330 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1332 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1333 sess_data
->iov
[1].iov_len
= blob_length
;
1335 rc
= SMB2_sess_sendreceive(sess_data
);
1336 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1338 /* If true, rc here is expected and not an error */
1339 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
1340 rsp
->sync_hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
1346 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) !=
1347 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
1348 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
1349 le16_to_cpu(rsp
->SecurityBufferOffset
));
1353 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
1354 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
1358 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
1361 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1362 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1365 kfree(ntlmssp_blob
);
1366 SMB2_sess_free_buffer(sess_data
);
1368 sess_data
->result
= 0;
1369 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
1373 kfree(ses
->ntlmssp
);
1374 ses
->ntlmssp
= NULL
;
1375 sess_data
->result
= rc
;
1376 sess_data
->func
= NULL
;
1380 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
1383 struct cifs_ses
*ses
= sess_data
->ses
;
1384 struct smb2_sess_setup_req
*req
;
1385 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1386 unsigned char *ntlmssp_blob
= NULL
;
1387 bool use_spnego
= false; /* else use raw ntlmssp */
1388 u16 blob_length
= 0;
1390 rc
= SMB2_sess_alloc_buffer(sess_data
);
1394 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
1395 req
->sync_hdr
.SessionId
= ses
->Suid
;
1397 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
, ses
,
1400 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
1405 /* BB eventually need to add this */
1406 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1410 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1411 sess_data
->iov
[1].iov_len
= blob_length
;
1413 rc
= SMB2_sess_sendreceive(sess_data
);
1417 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1419 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1420 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1422 rc
= SMB2_sess_establish_session(sess_data
);
1424 kfree(ntlmssp_blob
);
1425 SMB2_sess_free_buffer(sess_data
);
1426 kfree(ses
->ntlmssp
);
1427 ses
->ntlmssp
= NULL
;
1428 sess_data
->result
= rc
;
1429 sess_data
->func
= NULL
;
1433 SMB2_select_sec(struct cifs_ses
*ses
, struct SMB2_sess_data
*sess_data
)
1437 type
= smb2_select_sectype(ses
->server
, ses
->sectype
);
1438 cifs_dbg(FYI
, "sess setup type %d\n", type
);
1439 if (type
== Unspecified
) {
1441 "Unable to select appropriate authentication method!");
1447 sess_data
->func
= SMB2_auth_kerberos
;
1450 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
1453 cifs_dbg(VFS
, "secType %d not supported!\n", type
);
1461 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
1462 const struct nls_table
*nls_cp
)
1465 struct TCP_Server_Info
*server
= ses
->server
;
1466 struct SMB2_sess_data
*sess_data
;
1468 cifs_dbg(FYI
, "Session Setup\n");
1471 WARN(1, "%s: server is NULL!\n", __func__
);
1475 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
1479 rc
= SMB2_select_sec(ses
, sess_data
);
1482 sess_data
->xid
= xid
;
1483 sess_data
->ses
= ses
;
1484 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1485 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1486 sess_data
->previous_session
= ses
->Suid
;
1489 * Initialize the session hash with the server one.
1491 memcpy(ses
->preauth_sha_hash
, ses
->server
->preauth_sha_hash
,
1492 SMB2_PREAUTH_HASH_SIZE
);
1494 while (sess_data
->func
)
1495 sess_data
->func(sess_data
);
1497 if ((ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
) && (ses
->sign
))
1498 cifs_dbg(VFS
, "signing requested but authenticated as guest\n");
1499 rc
= sess_data
->result
;
1506 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1508 struct smb_rqst rqst
;
1509 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1511 struct TCP_Server_Info
*server
;
1513 unsigned int total_len
;
1515 struct kvec rsp_iov
;
1518 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1520 if (ses
&& (ses
->server
))
1521 server
= ses
->server
;
1525 /* no need to send SMB logoff if uid already closed due to reconnect */
1526 if (ses
->need_reconnect
)
1527 goto smb2_session_already_dead
;
1529 rc
= smb2_plain_req_init(SMB2_LOGOFF
, NULL
, (void **) &req
, &total_len
);
1533 /* since no tcon, smb2_init can not do this, so do here */
1534 req
->sync_hdr
.SessionId
= ses
->Suid
;
1536 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
1537 flags
|= CIFS_TRANSFORM_REQ
;
1538 else if (server
->sign
)
1539 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1541 flags
|= CIFS_NO_RESP
;
1543 iov
[0].iov_base
= (char *)req
;
1544 iov
[0].iov_len
= total_len
;
1546 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1550 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
1551 cifs_small_buf_release(req
);
1553 * No tcon so can't do
1554 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1557 smb2_session_already_dead
:
1561 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1563 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1566 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1568 /* These are similar values to what Windows uses */
1569 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1571 tcon
->max_chunks
= 256;
1572 tcon
->max_bytes_chunk
= 1048576;
1573 tcon
->max_bytes_copy
= 16777216;
1577 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1578 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1580 struct smb_rqst rqst
;
1581 struct smb2_tree_connect_req
*req
;
1582 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1584 struct kvec rsp_iov
= { NULL
, 0 };
1588 __le16
*unc_path
= NULL
;
1590 unsigned int total_len
;
1592 cifs_dbg(FYI
, "TCON\n");
1594 if (!(ses
->server
) || !tree
)
1597 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1598 if (unc_path
== NULL
)
1601 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1603 if (unc_path_len
< 2) {
1608 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1610 atomic_set(&tcon
->num_remote_opens
, 0);
1611 rc
= smb2_plain_req_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
,
1618 if (smb3_encryption_required(tcon
))
1619 flags
|= CIFS_TRANSFORM_REQ
;
1621 iov
[0].iov_base
= (char *)req
;
1623 iov
[0].iov_len
= total_len
- 1;
1625 /* Testing shows that buffer offset must be at location of Buffer[0] */
1626 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1628 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1629 iov
[1].iov_base
= unc_path
;
1630 iov
[1].iov_len
= unc_path_len
;
1633 * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1
1634 * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1
1635 * (Samba servers don't always set the flag so also check if null user)
1637 if ((ses
->server
->dialect
== SMB311_PROT_ID
) &&
1638 !smb3_encryption_required(tcon
) &&
1639 !(ses
->session_flags
&
1640 (SMB2_SESSION_FLAG_IS_GUEST
|SMB2_SESSION_FLAG_IS_NULL
)) &&
1641 ((ses
->user_name
!= NULL
) || (ses
->sectype
== Kerberos
)))
1642 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1644 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1648 /* Need 64 for max size write so ask for more in case not there yet */
1649 req
->sync_hdr
.CreditRequest
= cpu_to_le16(64);
1651 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
1652 cifs_small_buf_release(req
);
1653 rsp
= (struct smb2_tree_connect_rsp
*)rsp_iov
.iov_base
;
1654 trace_smb3_tcon(xid
, tcon
->tid
, ses
->Suid
, tree
, rc
);
1657 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1658 tcon
->need_reconnect
= true;
1660 goto tcon_error_exit
;
1663 switch (rsp
->ShareType
) {
1664 case SMB2_SHARE_TYPE_DISK
:
1665 cifs_dbg(FYI
, "connection to disk share\n");
1667 case SMB2_SHARE_TYPE_PIPE
:
1669 cifs_dbg(FYI
, "connection to pipe share\n");
1671 case SMB2_SHARE_TYPE_PRINT
:
1673 cifs_dbg(FYI
, "connection to printer\n");
1676 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1678 goto tcon_error_exit
;
1681 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1682 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1683 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1684 tcon
->tidStatus
= CifsGood
;
1685 tcon
->need_reconnect
= false;
1686 tcon
->tid
= rsp
->sync_hdr
.TreeId
;
1687 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1689 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1690 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1691 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1694 !(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
1695 cifs_dbg(VFS
, "Encryption is requested but not supported\n");
1697 init_copy_chunk_defaults(tcon
);
1698 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1699 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1702 free_rsp_buf(resp_buftype
, rsp
);
1707 if (rsp
&& rsp
->sync_hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1708 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1714 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1716 struct smb_rqst rqst
;
1717 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1719 struct cifs_ses
*ses
= tcon
->ses
;
1721 unsigned int total_len
;
1723 struct kvec rsp_iov
;
1726 cifs_dbg(FYI
, "Tree Disconnect\n");
1728 if (!ses
|| !(ses
->server
))
1731 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1734 rc
= smb2_plain_req_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
,
1739 if (smb3_encryption_required(tcon
))
1740 flags
|= CIFS_TRANSFORM_REQ
;
1742 flags
|= CIFS_NO_RESP
;
1744 iov
[0].iov_base
= (char *)req
;
1745 iov
[0].iov_len
= total_len
;
1747 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1751 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
1752 cifs_small_buf_release(req
);
1754 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1760 static struct create_durable
*
1761 create_durable_buf(void)
1763 struct create_durable
*buf
;
1765 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1769 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1770 (struct create_durable
, Data
));
1771 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1772 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1773 (struct create_durable
, Name
));
1774 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1775 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1783 static struct create_durable
*
1784 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1786 struct create_durable
*buf
;
1788 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1792 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1793 (struct create_durable
, Data
));
1794 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1795 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1796 (struct create_durable
, Name
));
1797 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1798 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1799 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1800 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1809 smb2_parse_lease_state(struct TCP_Server_Info
*server
,
1810 struct smb2_create_rsp
*rsp
,
1811 unsigned int *epoch
, char *lease_key
)
1814 struct create_context
*cc
;
1816 unsigned int remaining
;
1819 data_offset
= (char *)rsp
+ le32_to_cpu(rsp
->CreateContextsOffset
);
1820 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
1821 cc
= (struct create_context
*)data_offset
;
1822 while (remaining
>= sizeof(struct create_context
)) {
1823 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1824 if (le16_to_cpu(cc
->NameLength
) == 4 &&
1825 strncmp(name
, "RqLs", 4) == 0)
1826 return server
->ops
->parse_lease_buf(cc
, epoch
,
1829 next
= le32_to_cpu(cc
->Next
);
1833 cc
= (struct create_context
*)((char *)cc
+ next
);
1840 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1841 unsigned int *num_iovec
, u8
*lease_key
, __u8
*oplock
)
1843 struct smb2_create_req
*req
= iov
[0].iov_base
;
1844 unsigned int num
= *num_iovec
;
1846 iov
[num
].iov_base
= server
->ops
->create_lease_buf(lease_key
, *oplock
);
1847 if (iov
[num
].iov_base
== NULL
)
1849 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1850 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1851 if (!req
->CreateContextsOffset
)
1852 req
->CreateContextsOffset
= cpu_to_le32(
1853 sizeof(struct smb2_create_req
) +
1854 iov
[num
- 1].iov_len
);
1855 le32_add_cpu(&req
->CreateContextsLength
,
1856 server
->vals
->create_lease_size
);
1857 *num_iovec
= num
+ 1;
1861 static struct create_durable_v2
*
1862 create_durable_v2_buf(struct cifs_open_parms
*oparms
)
1864 struct cifs_fid
*pfid
= oparms
->fid
;
1865 struct create_durable_v2
*buf
;
1867 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1871 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1872 (struct create_durable_v2
, dcontext
));
1873 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1874 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1875 (struct create_durable_v2
, Name
));
1876 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1879 * NB: Handle timeout defaults to 0, which allows server to choose
1880 * (most servers default to 120 seconds) and most clients default to 0.
1881 * This can be overridden at mount ("handletimeout=") if the user wants
1882 * a different persistent (or resilient) handle timeout for all opens
1883 * opens on a particular SMB3 mount.
1885 buf
->dcontext
.Timeout
= cpu_to_le32(oparms
->tcon
->handle_timeout
);
1886 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1887 generate_random_uuid(buf
->dcontext
.CreateGuid
);
1888 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1890 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1898 static struct create_durable_handle_reconnect_v2
*
1899 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1901 struct create_durable_handle_reconnect_v2
*buf
;
1903 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1908 buf
->ccontext
.DataOffset
=
1909 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1911 buf
->ccontext
.DataLength
=
1912 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1913 buf
->ccontext
.NameOffset
=
1914 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1916 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1918 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1919 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1920 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1921 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1923 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1932 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1933 struct cifs_open_parms
*oparms
)
1935 struct smb2_create_req
*req
= iov
[0].iov_base
;
1936 unsigned int num
= *num_iovec
;
1938 iov
[num
].iov_base
= create_durable_v2_buf(oparms
);
1939 if (iov
[num
].iov_base
== NULL
)
1941 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1942 if (!req
->CreateContextsOffset
)
1943 req
->CreateContextsOffset
=
1944 cpu_to_le32(sizeof(struct smb2_create_req
) +
1946 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1947 *num_iovec
= num
+ 1;
1952 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1953 struct cifs_open_parms
*oparms
)
1955 struct smb2_create_req
*req
= iov
[0].iov_base
;
1956 unsigned int num
= *num_iovec
;
1958 /* indicate that we don't need to relock the file */
1959 oparms
->reconnect
= false;
1961 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1962 if (iov
[num
].iov_base
== NULL
)
1964 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1965 if (!req
->CreateContextsOffset
)
1966 req
->CreateContextsOffset
=
1967 cpu_to_le32(sizeof(struct smb2_create_req
) +
1969 le32_add_cpu(&req
->CreateContextsLength
,
1970 sizeof(struct create_durable_handle_reconnect_v2
));
1971 *num_iovec
= num
+ 1;
1976 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1977 struct cifs_open_parms
*oparms
, bool use_persistent
)
1979 struct smb2_create_req
*req
= iov
[0].iov_base
;
1980 unsigned int num
= *num_iovec
;
1982 if (use_persistent
) {
1983 if (oparms
->reconnect
)
1984 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1987 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1990 if (oparms
->reconnect
) {
1991 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1992 /* indicate that we don't need to relock the file */
1993 oparms
->reconnect
= false;
1995 iov
[num
].iov_base
= create_durable_buf();
1996 if (iov
[num
].iov_base
== NULL
)
1998 iov
[num
].iov_len
= sizeof(struct create_durable
);
1999 if (!req
->CreateContextsOffset
)
2000 req
->CreateContextsOffset
=
2001 cpu_to_le32(sizeof(struct smb2_create_req
) +
2003 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
2004 *num_iovec
= num
+ 1;
2008 /* See MS-SMB2 2.2.13.2.7 */
2009 static struct crt_twarp_ctxt
*
2010 create_twarp_buf(__u64 timewarp
)
2012 struct crt_twarp_ctxt
*buf
;
2014 buf
= kzalloc(sizeof(struct crt_twarp_ctxt
), GFP_KERNEL
);
2018 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
2019 (struct crt_twarp_ctxt
, Timestamp
));
2020 buf
->ccontext
.DataLength
= cpu_to_le32(8);
2021 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
2022 (struct crt_twarp_ctxt
, Name
));
2023 buf
->ccontext
.NameLength
= cpu_to_le16(4);
2024 /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
2029 buf
->Timestamp
= cpu_to_le64(timewarp
);
2033 /* See MS-SMB2 2.2.13.2.7 */
2035 add_twarp_context(struct kvec
*iov
, unsigned int *num_iovec
, __u64 timewarp
)
2037 struct smb2_create_req
*req
= iov
[0].iov_base
;
2038 unsigned int num
= *num_iovec
;
2040 iov
[num
].iov_base
= create_twarp_buf(timewarp
);
2041 if (iov
[num
].iov_base
== NULL
)
2043 iov
[num
].iov_len
= sizeof(struct crt_twarp_ctxt
);
2044 if (!req
->CreateContextsOffset
)
2045 req
->CreateContextsOffset
= cpu_to_le32(
2046 sizeof(struct smb2_create_req
) +
2047 iov
[num
- 1].iov_len
);
2048 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct crt_twarp_ctxt
));
2049 *num_iovec
= num
+ 1;
2054 alloc_path_with_tree_prefix(__le16
**out_path
, int *out_size
, int *out_len
,
2055 const char *treename
, const __le16
*path
)
2057 int treename_len
, path_len
;
2058 struct nls_table
*cp
;
2059 const __le16 sep
[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
2064 treename_len
= strlen(treename
);
2065 if (treename_len
< 2 || !(treename
[0] == '\\' && treename
[1] == '\\'))
2071 path_len
= UniStrnlen((wchar_t *)path
, PATH_MAX
);
2074 * make room for one path separator between the treename and
2077 *out_len
= treename_len
+ 1 + path_len
;
2080 * final path needs to be null-terminated UTF16 with a
2084 *out_size
= roundup((*out_len
+1)*2, 8);
2085 *out_path
= kzalloc(*out_size
, GFP_KERNEL
);
2089 cp
= load_nls_default();
2090 cifs_strtoUTF16(*out_path
, treename
, treename_len
, cp
);
2091 UniStrcat(*out_path
, sep
);
2092 UniStrcat(*out_path
, path
);
2098 int smb311_posix_mkdir(const unsigned int xid
, struct inode
*inode
,
2099 umode_t mode
, struct cifs_tcon
*tcon
,
2100 const char *full_path
,
2101 struct cifs_sb_info
*cifs_sb
)
2103 struct smb_rqst rqst
;
2104 struct smb2_create_req
*req
;
2105 struct smb2_create_rsp
*rsp
= NULL
;
2106 struct cifs_ses
*ses
= tcon
->ses
;
2107 struct kvec iov
[3]; /* make sure at least one for each open context */
2108 struct kvec rsp_iov
= {NULL
, 0};
2111 __le16
*copy_path
= NULL
;
2114 unsigned int n_iov
= 2;
2115 __u32 file_attributes
= 0;
2116 char *pc_buf
= NULL
;
2118 unsigned int total_len
;
2119 __le16
*utf16_path
= NULL
;
2121 cifs_dbg(FYI
, "mkdir\n");
2123 /* resource #1: path allocation */
2124 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
2128 if (!ses
|| !(ses
->server
)) {
2133 /* resource #2: request */
2134 rc
= smb2_plain_req_init(SMB2_CREATE
, tcon
, (void **) &req
, &total_len
);
2139 if (smb3_encryption_required(tcon
))
2140 flags
|= CIFS_TRANSFORM_REQ
;
2142 req
->ImpersonationLevel
= IL_IMPERSONATION
;
2143 req
->DesiredAccess
= cpu_to_le32(FILE_WRITE_ATTRIBUTES
);
2144 /* File attributes ignored on open (used in create though) */
2145 req
->FileAttributes
= cpu_to_le32(file_attributes
);
2146 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
2147 req
->CreateDisposition
= cpu_to_le32(FILE_CREATE
);
2148 req
->CreateOptions
= cpu_to_le32(CREATE_NOT_FILE
);
2150 iov
[0].iov_base
= (char *)req
;
2151 /* -1 since last byte is buf[0] which is sent below (path) */
2152 iov
[0].iov_len
= total_len
- 1;
2154 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
));
2156 /* [MS-SMB2] 2.2.13 NameOffset:
2157 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2158 * the SMB2 header, the file name includes a prefix that will
2159 * be processed during DFS name normalization as specified in
2160 * section 3.3.5.9. Otherwise, the file name is relative to
2161 * the share that is identified by the TreeId in the SMB2
2164 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
2167 req
->sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
2168 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
2170 tcon
->treeName
, utf16_path
);
2174 req
->NameLength
= cpu_to_le16(name_len
* 2);
2175 uni_path_len
= copy_size
;
2176 /* free before overwriting resource */
2178 utf16_path
= copy_path
;
2180 uni_path_len
= (2 * UniStrnlen((wchar_t *)utf16_path
, PATH_MAX
)) + 2;
2181 /* MUST set path len (NameLength) to 0 opening root of share */
2182 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
2183 if (uni_path_len
% 8 != 0) {
2184 copy_size
= roundup(uni_path_len
, 8);
2185 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
2190 memcpy((char *)copy_path
, (const char *)utf16_path
,
2192 uni_path_len
= copy_size
;
2193 /* free before overwriting resource */
2195 utf16_path
= copy_path
;
2199 iov
[1].iov_len
= uni_path_len
;
2200 iov
[1].iov_base
= utf16_path
;
2201 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_NONE
;
2203 if (tcon
->posix_extensions
) {
2204 /* resource #3: posix buf */
2205 rc
= add_posix_context(iov
, &n_iov
, mode
);
2208 pc_buf
= iov
[n_iov
-1].iov_base
;
2212 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2214 rqst
.rq_nvec
= n_iov
;
2216 trace_smb3_posix_mkdir_enter(xid
, tcon
->tid
, ses
->Suid
, CREATE_NOT_FILE
,
2217 FILE_WRITE_ATTRIBUTES
);
2218 /* resource #4: response buffer */
2219 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2221 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
2222 trace_smb3_posix_mkdir_err(xid
, tcon
->tid
, ses
->Suid
,
2224 FILE_WRITE_ATTRIBUTES
, rc
);
2225 goto err_free_rsp_buf
;
2228 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
2229 trace_smb3_posix_mkdir_done(xid
, rsp
->PersistentFileId
, tcon
->tid
,
2230 ses
->Suid
, CREATE_NOT_FILE
,
2231 FILE_WRITE_ATTRIBUTES
);
2233 SMB2_close(xid
, tcon
, rsp
->PersistentFileId
, rsp
->VolatileFileId
);
2235 /* Eventually save off posix specific response info and timestaps */
2238 free_rsp_buf(resp_buftype
, rsp
);
2241 cifs_small_buf_release(req
);
2248 SMB2_open_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
, __u8
*oplock
,
2249 struct cifs_open_parms
*oparms
, __le16
*path
)
2251 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2252 struct smb2_create_req
*req
;
2253 unsigned int n_iov
= 2;
2254 __u32 file_attributes
= 0;
2257 unsigned int total_len
;
2258 struct kvec
*iov
= rqst
->rq_iov
;
2262 rc
= smb2_plain_req_init(SMB2_CREATE
, tcon
, (void **) &req
, &total_len
);
2266 iov
[0].iov_base
= (char *)req
;
2267 /* -1 since last byte is buf[0] which is sent below (path) */
2268 iov
[0].iov_len
= total_len
- 1;
2270 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
2271 file_attributes
|= ATTR_READONLY
;
2272 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
2273 file_attributes
|= ATTR_SYSTEM
;
2275 req
->ImpersonationLevel
= IL_IMPERSONATION
;
2276 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
2277 /* File attributes ignored on open (used in create though) */
2278 req
->FileAttributes
= cpu_to_le32(file_attributes
);
2279 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
2280 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
2281 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
2282 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
));
2284 /* [MS-SMB2] 2.2.13 NameOffset:
2285 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2286 * the SMB2 header, the file name includes a prefix that will
2287 * be processed during DFS name normalization as specified in
2288 * section 3.3.5.9. Otherwise, the file name is relative to
2289 * the share that is identified by the TreeId in the SMB2
2292 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
2295 req
->sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
2296 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
2298 tcon
->treeName
, path
);
2301 req
->NameLength
= cpu_to_le16(name_len
* 2);
2302 uni_path_len
= copy_size
;
2305 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
2306 /* MUST set path len (NameLength) to 0 opening root of share */
2307 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
2308 copy_size
= uni_path_len
;
2309 if (copy_size
% 8 != 0)
2310 copy_size
= roundup(copy_size
, 8);
2311 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
2314 memcpy((char *)copy_path
, (const char *)path
,
2316 uni_path_len
= copy_size
;
2320 iov
[1].iov_len
= uni_path_len
;
2321 iov
[1].iov_base
= path
;
2323 if (!server
->oplocks
)
2324 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2326 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
2327 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
2328 req
->RequestedOplockLevel
= *oplock
;
2329 else if (!(server
->capabilities
& SMB2_GLOBAL_CAP_DIRECTORY_LEASING
) &&
2330 (oparms
->create_options
& CREATE_NOT_FILE
))
2331 req
->RequestedOplockLevel
= *oplock
; /* no srv lease support */
2333 rc
= add_lease_context(server
, iov
, &n_iov
,
2334 oparms
->fid
->lease_key
, oplock
);
2339 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
2340 /* need to set Next field of lease context if we request it */
2341 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
2342 struct create_context
*ccontext
=
2343 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2345 cpu_to_le32(server
->vals
->create_lease_size
);
2348 rc
= add_durable_context(iov
, &n_iov
, oparms
,
2349 tcon
->use_persistent
);
2354 if (tcon
->posix_extensions
) {
2356 struct create_context
*ccontext
=
2357 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2359 cpu_to_le32(iov
[n_iov
-1].iov_len
);
2362 rc
= add_posix_context(iov
, &n_iov
, oparms
->mode
);
2367 if (tcon
->snapshot_time
) {
2368 cifs_dbg(FYI
, "adding snapshot context\n");
2370 struct create_context
*ccontext
=
2371 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2373 cpu_to_le32(iov
[n_iov
-1].iov_len
);
2376 rc
= add_twarp_context(iov
, &n_iov
, tcon
->snapshot_time
);
2382 rqst
->rq_nvec
= n_iov
;
2386 /* rq_iov[0] is the request and is released by cifs_small_buf_release().
2387 * All other vectors are freed by kfree().
2390 SMB2_open_free(struct smb_rqst
*rqst
)
2394 if (rqst
&& rqst
->rq_iov
) {
2395 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
);
2396 for (i
= 1; i
< rqst
->rq_nvec
; i
++)
2397 if (rqst
->rq_iov
[i
].iov_base
!= smb2_padding
)
2398 kfree(rqst
->rq_iov
[i
].iov_base
);
2403 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
2404 __u8
*oplock
, struct smb2_file_all_info
*buf
,
2405 struct kvec
*err_iov
, int *buftype
)
2407 struct smb_rqst rqst
;
2408 struct smb2_create_rsp
*rsp
= NULL
;
2409 struct TCP_Server_Info
*server
;
2410 struct cifs_tcon
*tcon
= oparms
->tcon
;
2411 struct cifs_ses
*ses
= tcon
->ses
;
2412 struct kvec iov
[SMB2_CREATE_IOV_SIZE
];
2413 struct kvec rsp_iov
= {NULL
, 0};
2414 int resp_buftype
= CIFS_NO_BUFFER
;
2418 cifs_dbg(FYI
, "create/open\n");
2419 if (ses
&& (ses
->server
))
2420 server
= ses
->server
;
2424 if (smb3_encryption_required(tcon
))
2425 flags
|= CIFS_TRANSFORM_REQ
;
2427 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2428 memset(&iov
, 0, sizeof(iov
));
2430 rqst
.rq_nvec
= SMB2_CREATE_IOV_SIZE
;
2432 rc
= SMB2_open_init(tcon
, &rqst
, oplock
, oparms
, path
);
2436 trace_smb3_open_enter(xid
, tcon
->tid
, tcon
->ses
->Suid
,
2437 oparms
->create_options
, oparms
->desired_access
);
2439 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
2441 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
2444 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
2445 if (err_iov
&& rsp
) {
2447 *buftype
= resp_buftype
;
2448 resp_buftype
= CIFS_NO_BUFFER
;
2451 trace_smb3_open_err(xid
, tcon
->tid
, ses
->Suid
,
2452 oparms
->create_options
, oparms
->desired_access
, rc
);
2455 trace_smb3_open_done(xid
, rsp
->PersistentFileId
, tcon
->tid
,
2456 ses
->Suid
, oparms
->create_options
,
2457 oparms
->desired_access
);
2459 atomic_inc(&tcon
->num_remote_opens
);
2460 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
2461 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
2462 #ifdef CONFIG_CIFS_DEBUG2
2463 oparms
->fid
->mid
= le64_to_cpu(rsp
->sync_hdr
.MessageId
);
2464 #endif /* CIFS_DEBUG2 */
2467 memcpy(buf
, &rsp
->CreationTime
, 32);
2468 buf
->AllocationSize
= rsp
->AllocationSize
;
2469 buf
->EndOfFile
= rsp
->EndofFile
;
2470 buf
->Attributes
= rsp
->FileAttributes
;
2471 buf
->NumberOfLinks
= cpu_to_le32(1);
2472 buf
->DeletePending
= 0;
2475 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
2476 *oplock
= smb2_parse_lease_state(server
, rsp
,
2477 &oparms
->fid
->epoch
,
2478 oparms
->fid
->lease_key
);
2480 *oplock
= rsp
->OplockLevel
;
2482 SMB2_open_free(&rqst
);
2483 free_rsp_buf(resp_buftype
, rsp
);
2488 SMB2_ioctl_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
,
2489 u64 persistent_fid
, u64 volatile_fid
, u32 opcode
,
2490 bool is_fsctl
, char *in_data
, u32 indatalen
,
2491 __u32 max_response_size
)
2493 struct smb2_ioctl_req
*req
;
2494 struct kvec
*iov
= rqst
->rq_iov
;
2495 unsigned int total_len
;
2498 rc
= smb2_plain_req_init(SMB2_IOCTL
, tcon
, (void **) &req
, &total_len
);
2502 req
->CtlCode
= cpu_to_le32(opcode
);
2503 req
->PersistentFileId
= persistent_fid
;
2504 req
->VolatileFileId
= volatile_fid
;
2506 iov
[0].iov_base
= (char *)req
;
2508 * If no input data, the size of ioctl struct in
2509 * protocol spec still includes a 1 byte data buffer,
2510 * but if input data passed to ioctl, we do not
2511 * want to double count this, so we do not send
2512 * the dummy one byte of data in iovec[0] if sending
2513 * input data (in iovec[1]).
2516 req
->InputCount
= cpu_to_le32(indatalen
);
2517 /* do not set InputOffset if no input data */
2519 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
));
2521 iov
[0].iov_len
= total_len
- 1;
2522 iov
[1].iov_base
= in_data
;
2523 iov
[1].iov_len
= indatalen
;
2526 iov
[0].iov_len
= total_len
;
2529 req
->OutputOffset
= 0;
2530 req
->OutputCount
= 0; /* MBZ */
2533 * In most cases max_response_size is set to 16K (CIFSMaxBufSize)
2534 * We Could increase default MaxOutputResponse, but that could require
2535 * more credits. Windows typically sets this smaller, but for some
2536 * ioctls it may be useful to allow server to send more. No point
2537 * limiting what the server can send as long as fits in one credit
2538 * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want
2539 * to increase this limit up in the future.
2540 * Note that for snapshot queries that servers like Azure expect that
2541 * the first query be minimal size (and just used to get the number/size
2542 * of previous versions) so response size must be specified as EXACTLY
2543 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2544 * of eight bytes. Currently that is the only case where we set max
2545 * response size smaller.
2547 req
->MaxOutputResponse
= cpu_to_le32(max_response_size
);
2550 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
2554 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2555 if (opcode
== FSCTL_VALIDATE_NEGOTIATE_INFO
)
2556 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
2562 SMB2_ioctl_free(struct smb_rqst
*rqst
)
2564 if (rqst
&& rqst
->rq_iov
)
2565 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
2570 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2573 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2574 u64 volatile_fid
, u32 opcode
, bool is_fsctl
,
2575 char *in_data
, u32 indatalen
, u32 max_out_data_len
,
2576 char **out_data
, u32
*plen
/* returned data len */)
2578 struct smb_rqst rqst
;
2579 struct smb2_ioctl_rsp
*rsp
= NULL
;
2580 struct cifs_ses
*ses
;
2581 struct kvec iov
[SMB2_IOCTL_IOV_SIZE
];
2582 struct kvec rsp_iov
= {NULL
, 0};
2583 int resp_buftype
= CIFS_NO_BUFFER
;
2587 cifs_dbg(FYI
, "SMB2 IOCTL\n");
2589 if (out_data
!= NULL
)
2592 /* zero out returned data len, in case of error */
2601 if (!ses
|| !(ses
->server
))
2604 if (smb3_encryption_required(tcon
))
2605 flags
|= CIFS_TRANSFORM_REQ
;
2607 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2608 memset(&iov
, 0, sizeof(iov
));
2610 rqst
.rq_nvec
= SMB2_IOCTL_IOV_SIZE
;
2612 rc
= SMB2_ioctl_init(tcon
, &rqst
, persistent_fid
, volatile_fid
, opcode
,
2613 is_fsctl
, in_data
, indatalen
, max_out_data_len
);
2617 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
2619 rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
.iov_base
;
2622 trace_smb3_fsctl_err(xid
, persistent_fid
, tcon
->tid
,
2623 ses
->Suid
, 0, opcode
, rc
);
2625 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
2626 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
2628 } else if (rc
== -EINVAL
) {
2629 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
2630 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
2631 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
2636 /* check if caller wants to look at return data or just return rc */
2637 if ((plen
== NULL
) || (out_data
== NULL
))
2640 *plen
= le32_to_cpu(rsp
->OutputCount
);
2642 /* We check for obvious errors in the output buffer length and offset */
2644 goto ioctl_exit
; /* server returned no data */
2645 else if (*plen
> rsp_iov
.iov_len
|| *plen
> 0xFF00) {
2646 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
2652 if (rsp_iov
.iov_len
- *plen
< le32_to_cpu(rsp
->OutputOffset
)) {
2653 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
2654 le32_to_cpu(rsp
->OutputOffset
));
2660 *out_data
= kmemdup((char *)rsp
+ le32_to_cpu(rsp
->OutputOffset
),
2662 if (*out_data
== NULL
) {
2668 SMB2_ioctl_free(&rqst
);
2669 free_rsp_buf(resp_buftype
, rsp
);
2674 * Individual callers to ioctl worker function follow
2678 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
2679 u64 persistent_fid
, u64 volatile_fid
)
2682 struct compress_ioctl fsctl_input
;
2683 char *ret_data
= NULL
;
2685 fsctl_input
.CompressionState
=
2686 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
2688 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
2689 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
2690 (char *)&fsctl_input
/* data input */,
2691 2 /* in data len */, CIFSMaxBufSize
/* max out data */,
2692 &ret_data
/* out data */, NULL
);
2694 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
2700 SMB2_close_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
,
2701 u64 persistent_fid
, u64 volatile_fid
)
2703 struct smb2_close_req
*req
;
2704 struct kvec
*iov
= rqst
->rq_iov
;
2705 unsigned int total_len
;
2708 rc
= smb2_plain_req_init(SMB2_CLOSE
, tcon
, (void **) &req
, &total_len
);
2712 req
->PersistentFileId
= persistent_fid
;
2713 req
->VolatileFileId
= volatile_fid
;
2714 iov
[0].iov_base
= (char *)req
;
2715 iov
[0].iov_len
= total_len
;
2721 SMB2_close_free(struct smb_rqst
*rqst
)
2723 if (rqst
&& rqst
->rq_iov
)
2724 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
2728 SMB2_close_flags(const unsigned int xid
, struct cifs_tcon
*tcon
,
2729 u64 persistent_fid
, u64 volatile_fid
, int flags
)
2731 struct smb_rqst rqst
;
2732 struct smb2_close_rsp
*rsp
= NULL
;
2733 struct cifs_ses
*ses
= tcon
->ses
;
2735 struct kvec rsp_iov
;
2736 int resp_buftype
= CIFS_NO_BUFFER
;
2739 cifs_dbg(FYI
, "Close\n");
2741 if (!ses
|| !(ses
->server
))
2744 if (smb3_encryption_required(tcon
))
2745 flags
|= CIFS_TRANSFORM_REQ
;
2747 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2748 memset(&iov
, 0, sizeof(iov
));
2752 rc
= SMB2_close_init(tcon
, &rqst
, persistent_fid
, volatile_fid
);
2756 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2757 rsp
= (struct smb2_close_rsp
*)rsp_iov
.iov_base
;
2760 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
2761 trace_smb3_close_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
2766 atomic_dec(&tcon
->num_remote_opens
);
2768 /* BB FIXME - decode close response, update inode for caching */
2771 SMB2_close_free(&rqst
);
2772 free_rsp_buf(resp_buftype
, rsp
);
2777 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
2778 u64 persistent_fid
, u64 volatile_fid
)
2780 return SMB2_close_flags(xid
, tcon
, persistent_fid
, volatile_fid
, 0);
2784 smb2_validate_iov(unsigned int offset
, unsigned int buffer_length
,
2785 struct kvec
*iov
, unsigned int min_buf_size
)
2787 unsigned int smb_len
= iov
->iov_len
;
2788 char *end_of_smb
= smb_len
+ (char *)iov
->iov_base
;
2789 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
2790 char *end_of_buf
= begin_of_buf
+ buffer_length
;
2793 if (buffer_length
< min_buf_size
) {
2794 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
2795 buffer_length
, min_buf_size
);
2799 /* check if beyond RFC1001 maximum length */
2800 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
2801 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
2802 buffer_length
, smb_len
);
2806 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
2807 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
2815 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2816 * Caller must free buffer.
2819 smb2_validate_and_copy_iov(unsigned int offset
, unsigned int buffer_length
,
2820 struct kvec
*iov
, unsigned int minbufsize
,
2823 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
2829 rc
= smb2_validate_iov(offset
, buffer_length
, iov
, minbufsize
);
2833 memcpy(data
, begin_of_buf
, buffer_length
);
2839 SMB2_query_info_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
,
2840 u64 persistent_fid
, u64 volatile_fid
,
2841 u8 info_class
, u8 info_type
, u32 additional_info
,
2842 size_t output_len
, size_t input_len
, void *input
)
2844 struct smb2_query_info_req
*req
;
2845 struct kvec
*iov
= rqst
->rq_iov
;
2846 unsigned int total_len
;
2849 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
,
2854 req
->InfoType
= info_type
;
2855 req
->FileInfoClass
= info_class
;
2856 req
->PersistentFileId
= persistent_fid
;
2857 req
->VolatileFileId
= volatile_fid
;
2858 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
2860 req
->OutputBufferLength
= cpu_to_le32(output_len
);
2862 req
->InputBufferLength
= cpu_to_le32(input_len
);
2863 /* total_len for smb query request never close to le16 max */
2864 req
->InputBufferOffset
= cpu_to_le16(total_len
- 1);
2865 memcpy(req
->Buffer
, input
, input_len
);
2868 iov
[0].iov_base
= (char *)req
;
2870 iov
[0].iov_len
= total_len
- 1 + input_len
;
2875 SMB2_query_info_free(struct smb_rqst
*rqst
)
2877 if (rqst
&& rqst
->rq_iov
)
2878 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
2882 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2883 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
, u8 info_type
,
2884 u32 additional_info
, size_t output_len
, size_t min_len
, void **data
,
2887 struct smb_rqst rqst
;
2888 struct smb2_query_info_rsp
*rsp
= NULL
;
2890 struct kvec rsp_iov
;
2892 int resp_buftype
= CIFS_NO_BUFFER
;
2893 struct cifs_ses
*ses
= tcon
->ses
;
2895 bool allocated
= false;
2897 cifs_dbg(FYI
, "Query Info\n");
2899 if (!ses
|| !(ses
->server
))
2902 if (smb3_encryption_required(tcon
))
2903 flags
|= CIFS_TRANSFORM_REQ
;
2905 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2906 memset(&iov
, 0, sizeof(iov
));
2910 rc
= SMB2_query_info_init(tcon
, &rqst
, persistent_fid
, volatile_fid
,
2911 info_class
, info_type
, additional_info
,
2912 output_len
, 0, NULL
);
2916 trace_smb3_query_info_enter(xid
, persistent_fid
, tcon
->tid
,
2917 ses
->Suid
, info_class
, (__u32
)info_type
);
2919 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2920 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
2923 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2924 trace_smb3_query_info_err(xid
, persistent_fid
, tcon
->tid
,
2925 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
2929 trace_smb3_query_info_done(xid
, persistent_fid
, tcon
->tid
,
2930 ses
->Suid
, info_class
, (__u32
)info_type
);
2933 *dlen
= le32_to_cpu(rsp
->OutputBufferLength
);
2935 *data
= kmalloc(*dlen
, GFP_KERNEL
);
2938 "Error %d allocating memory for acl\n",
2948 rc
= smb2_validate_and_copy_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
2949 le32_to_cpu(rsp
->OutputBufferLength
),
2950 &rsp_iov
, min_len
, *data
);
2951 if (rc
&& allocated
) {
2958 SMB2_query_info_free(&rqst
);
2959 free_rsp_buf(resp_buftype
, rsp
);
2963 int SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2964 u64 persistent_fid
, u64 volatile_fid
, struct smb2_file_all_info
*data
)
2966 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2967 FILE_ALL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2968 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
2969 sizeof(struct smb2_file_all_info
), (void **)&data
,
2974 SMB2_query_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
2975 u64 persistent_fid
, u64 volatile_fid
,
2976 void **data
, u32
*plen
)
2978 __u32 additional_info
= OWNER_SECINFO
| GROUP_SECINFO
| DACL_SECINFO
;
2981 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2982 0, SMB2_O_INFO_SECURITY
, additional_info
,
2983 SMB2_MAX_BUFFER_SIZE
, MIN_SEC_DESC_LEN
, data
, plen
);
2987 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
2988 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
2990 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2991 FILE_INTERNAL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2992 sizeof(struct smb2_file_internal_info
),
2993 sizeof(struct smb2_file_internal_info
),
2994 (void **)&uniqueid
, NULL
);
2998 * This is a no-op for now. We're not really interested in the reply, but
2999 * rather in the fact that the server sent one and that server->lstrp
3002 * FIXME: maybe we should consider checking that the reply matches request?
3005 smb2_echo_callback(struct mid_q_entry
*mid
)
3007 struct TCP_Server_Info
*server
= mid
->callback_data
;
3008 struct smb2_echo_rsp
*rsp
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
3009 struct cifs_credits credits
= { .value
= 0, .instance
= 0 };
3011 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
3012 || mid
->mid_state
== MID_RESPONSE_MALFORMED
) {
3013 credits
.value
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
3014 credits
.instance
= server
->reconnect_instance
;
3017 DeleteMidQEntry(mid
);
3018 add_credits(server
, &credits
, CIFS_ECHO_OP
);
3021 void smb2_reconnect_server(struct work_struct
*work
)
3023 struct TCP_Server_Info
*server
= container_of(work
,
3024 struct TCP_Server_Info
, reconnect
.work
);
3025 struct cifs_ses
*ses
;
3026 struct cifs_tcon
*tcon
, *tcon2
;
3027 struct list_head tmp_list
;
3028 int tcon_exist
= false;
3030 int resched
= false;
3033 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
3034 mutex_lock(&server
->reconnect_mutex
);
3036 INIT_LIST_HEAD(&tmp_list
);
3037 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
3039 spin_lock(&cifs_tcp_ses_lock
);
3040 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
3041 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
3042 if (tcon
->need_reconnect
|| tcon
->need_reopen_files
) {
3044 list_add_tail(&tcon
->rlist
, &tmp_list
);
3048 if (ses
->tcon_ipc
&& ses
->tcon_ipc
->need_reconnect
) {
3049 list_add_tail(&ses
->tcon_ipc
->rlist
, &tmp_list
);
3054 * Get the reference to server struct to be sure that the last call of
3055 * cifs_put_tcon() in the loop below won't release the server pointer.
3058 server
->srv_count
++;
3060 spin_unlock(&cifs_tcp_ses_lock
);
3062 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
3063 rc
= smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
);
3065 cifs_reopen_persistent_handles(tcon
);
3068 list_del_init(&tcon
->rlist
);
3069 cifs_put_tcon(tcon
);
3072 cifs_dbg(FYI
, "Reconnecting tcons finished\n");
3074 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 2 * HZ
);
3075 mutex_unlock(&server
->reconnect_mutex
);
3077 /* now we can safely release srv struct */
3079 cifs_put_tcp_session(server
, 1);
3083 SMB2_echo(struct TCP_Server_Info
*server
)
3085 struct smb2_echo_req
*req
;
3088 struct smb_rqst rqst
= { .rq_iov
= iov
,
3090 unsigned int total_len
;
3092 cifs_dbg(FYI
, "In echo request\n");
3094 if (server
->tcpStatus
== CifsNeedNegotiate
) {
3095 /* No need to send echo on newly established connections */
3096 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
3100 rc
= smb2_plain_req_init(SMB2_ECHO
, NULL
, (void **)&req
, &total_len
);
3104 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
3106 iov
[0].iov_len
= total_len
;
3107 iov
[0].iov_base
= (char *)req
;
3109 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, NULL
,
3110 server
, CIFS_ECHO_OP
, NULL
);
3112 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
3114 cifs_small_buf_release(req
);
3119 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3122 struct smb_rqst rqst
;
3123 struct smb2_flush_req
*req
;
3124 struct cifs_ses
*ses
= tcon
->ses
;
3126 struct kvec rsp_iov
;
3130 unsigned int total_len
;
3132 cifs_dbg(FYI
, "Flush\n");
3134 if (!ses
|| !(ses
->server
))
3137 rc
= smb2_plain_req_init(SMB2_FLUSH
, tcon
, (void **) &req
, &total_len
);
3141 if (smb3_encryption_required(tcon
))
3142 flags
|= CIFS_TRANSFORM_REQ
;
3144 req
->PersistentFileId
= persistent_fid
;
3145 req
->VolatileFileId
= volatile_fid
;
3147 iov
[0].iov_base
= (char *)req
;
3148 iov
[0].iov_len
= total_len
;
3150 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3154 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3155 cifs_small_buf_release(req
);
3158 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
3159 trace_smb3_flush_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
3163 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3168 * To form a chain of read requests, any read requests after the first should
3169 * have the end_of_chain boolean set to true.
3172 smb2_new_read_req(void **buf
, unsigned int *total_len
,
3173 struct cifs_io_parms
*io_parms
, struct cifs_readdata
*rdata
,
3174 unsigned int remaining_bytes
, int request_type
)
3177 struct smb2_read_plain_req
*req
= NULL
;
3178 struct smb2_sync_hdr
*shdr
;
3179 struct TCP_Server_Info
*server
;
3181 rc
= smb2_plain_req_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
,
3186 server
= io_parms
->tcon
->ses
->server
;
3188 return -ECONNABORTED
;
3190 shdr
= &req
->sync_hdr
;
3191 shdr
->ProcessId
= cpu_to_le32(io_parms
->pid
);
3193 req
->PersistentFileId
= io_parms
->persistent_fid
;
3194 req
->VolatileFileId
= io_parms
->volatile_fid
;
3195 req
->ReadChannelInfoOffset
= 0; /* reserved */
3196 req
->ReadChannelInfoLength
= 0; /* reserved */
3197 req
->Channel
= 0; /* reserved */
3198 req
->MinimumCount
= 0;
3199 req
->Length
= cpu_to_le32(io_parms
->length
);
3200 req
->Offset
= cpu_to_le64(io_parms
->offset
);
3202 trace_smb3_read_enter(0 /* xid */,
3203 io_parms
->persistent_fid
,
3204 io_parms
->tcon
->tid
, io_parms
->tcon
->ses
->Suid
,
3205 io_parms
->offset
, io_parms
->length
);
3206 #ifdef CONFIG_CIFS_SMB_DIRECT
3208 * If we want to do a RDMA write, fill in and append
3209 * smbd_buffer_descriptor_v1 to the end of read request
3211 if (server
->rdma
&& rdata
&& !server
->sign
&&
3212 rdata
->bytes
>= server
->smbd_conn
->rdma_readwrite_threshold
) {
3214 struct smbd_buffer_descriptor_v1
*v1
;
3215 bool need_invalidate
=
3216 io_parms
->tcon
->ses
->server
->dialect
== SMB30_PROT_ID
;
3218 rdata
->mr
= smbd_register_mr(
3219 server
->smbd_conn
, rdata
->pages
,
3220 rdata
->nr_pages
, rdata
->page_offset
,
3221 rdata
->tailsz
, true, need_invalidate
);
3225 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
3226 if (need_invalidate
)
3227 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
3228 req
->ReadChannelInfoOffset
=
3229 cpu_to_le16(offsetof(struct smb2_read_plain_req
, Buffer
));
3230 req
->ReadChannelInfoLength
=
3231 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
3232 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
3233 v1
->offset
= cpu_to_le64(rdata
->mr
->mr
->iova
);
3234 v1
->token
= cpu_to_le32(rdata
->mr
->mr
->rkey
);
3235 v1
->length
= cpu_to_le32(rdata
->mr
->mr
->length
);
3237 *total_len
+= sizeof(*v1
) - 1;
3240 if (request_type
& CHAINED_REQUEST
) {
3241 if (!(request_type
& END_OF_CHAIN
)) {
3242 /* next 8-byte aligned request */
3243 *total_len
= DIV_ROUND_UP(*total_len
, 8) * 8;
3244 shdr
->NextCommand
= cpu_to_le32(*total_len
);
3245 } else /* END_OF_CHAIN */
3246 shdr
->NextCommand
= 0;
3247 if (request_type
& RELATED_REQUEST
) {
3248 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
3250 * Related requests use info from previous read request
3253 shdr
->SessionId
= 0xFFFFFFFF;
3254 shdr
->TreeId
= 0xFFFFFFFF;
3255 req
->PersistentFileId
= 0xFFFFFFFF;
3256 req
->VolatileFileId
= 0xFFFFFFFF;
3259 if (remaining_bytes
> io_parms
->length
)
3260 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
3262 req
->RemainingBytes
= 0;
3269 smb2_readv_callback(struct mid_q_entry
*mid
)
3271 struct cifs_readdata
*rdata
= mid
->callback_data
;
3272 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
3273 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
3274 struct smb2_sync_hdr
*shdr
=
3275 (struct smb2_sync_hdr
*)rdata
->iov
[0].iov_base
;
3276 struct cifs_credits credits
= { .value
= 0, .instance
= 0 };
3277 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
3279 .rq_pages
= rdata
->pages
,
3280 .rq_offset
= rdata
->page_offset
,
3281 .rq_npages
= rdata
->nr_pages
,
3282 .rq_pagesz
= rdata
->pagesz
,
3283 .rq_tailsz
= rdata
->tailsz
};
3285 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
3286 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
3289 switch (mid
->mid_state
) {
3290 case MID_RESPONSE_RECEIVED
:
3291 credits
.value
= le16_to_cpu(shdr
->CreditRequest
);
3292 credits
.instance
= server
->reconnect_instance
;
3293 /* result already set, check signature */
3294 if (server
->sign
&& !mid
->decrypted
) {
3297 rc
= smb2_verify_signature(&rqst
, server
);
3299 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
3302 /* FIXME: should this be counted toward the initiating task? */
3303 task_io_account_read(rdata
->got_bytes
);
3304 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
3306 case MID_REQUEST_SUBMITTED
:
3307 case MID_RETRY_NEEDED
:
3308 rdata
->result
= -EAGAIN
;
3309 if (server
->sign
&& rdata
->got_bytes
)
3310 /* reset bytes number since we can not check a sign */
3311 rdata
->got_bytes
= 0;
3312 /* FIXME: should this be counted toward the initiating task? */
3313 task_io_account_read(rdata
->got_bytes
);
3314 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
3316 case MID_RESPONSE_MALFORMED
:
3317 credits
.value
= le16_to_cpu(shdr
->CreditRequest
);
3318 credits
.instance
= server
->reconnect_instance
;
3321 rdata
->result
= -EIO
;
3323 #ifdef CONFIG_CIFS_SMB_DIRECT
3325 * If this rdata has a memmory registered, the MR can be freed
3326 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3327 * because they have limited number and are used for future I/Os
3330 smbd_deregister_mr(rdata
->mr
);
3334 if (rdata
->result
&& rdata
->result
!= -ENODATA
) {
3335 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
3336 trace_smb3_read_err(0 /* xid */,
3337 rdata
->cfile
->fid
.persistent_fid
,
3338 tcon
->tid
, tcon
->ses
->Suid
, rdata
->offset
,
3339 rdata
->bytes
, rdata
->result
);
3341 trace_smb3_read_done(0 /* xid */,
3342 rdata
->cfile
->fid
.persistent_fid
,
3343 tcon
->tid
, tcon
->ses
->Suid
,
3344 rdata
->offset
, rdata
->got_bytes
);
3346 queue_work(cifsiod_wq
, &rdata
->work
);
3347 DeleteMidQEntry(mid
);
3348 add_credits(server
, &credits
, 0);
3351 /* smb2_async_readv - send an async read, and set up mid to handle result */
3353 smb2_async_readv(struct cifs_readdata
*rdata
)
3357 struct smb2_sync_hdr
*shdr
;
3358 struct cifs_io_parms io_parms
;
3359 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
3361 struct TCP_Server_Info
*server
;
3362 unsigned int total_len
;
3364 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
3365 __func__
, rdata
->offset
, rdata
->bytes
);
3367 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
3368 io_parms
.offset
= rdata
->offset
;
3369 io_parms
.length
= rdata
->bytes
;
3370 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
3371 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
3372 io_parms
.pid
= rdata
->pid
;
3374 server
= io_parms
.tcon
->ses
->server
;
3376 rc
= smb2_new_read_req(
3377 (void **) &buf
, &total_len
, &io_parms
, rdata
, 0, 0);
3381 if (smb3_encryption_required(io_parms
.tcon
))
3382 flags
|= CIFS_TRANSFORM_REQ
;
3384 rdata
->iov
[0].iov_base
= buf
;
3385 rdata
->iov
[0].iov_len
= total_len
;
3387 shdr
= (struct smb2_sync_hdr
*)buf
;
3389 if (rdata
->credits
.value
> 0) {
3390 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
3391 SMB2_MAX_BUFFER_SIZE
));
3392 shdr
->CreditRequest
=
3393 cpu_to_le16(le16_to_cpu(shdr
->CreditCharge
) + 1);
3395 rc
= adjust_credits(server
, &rdata
->credits
, rdata
->bytes
);
3397 goto async_readv_out
;
3399 flags
|= CIFS_HAS_CREDITS
;
3402 kref_get(&rdata
->refcount
);
3403 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
3404 cifs_readv_receive
, smb2_readv_callback
,
3405 smb3_handle_read_data
, rdata
, flags
,
3408 kref_put(&rdata
->refcount
, cifs_readdata_release
);
3409 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
3410 trace_smb3_read_err(0 /* xid */, io_parms
.persistent_fid
,
3412 io_parms
.tcon
->ses
->Suid
,
3413 io_parms
.offset
, io_parms
.length
, rc
);
3417 cifs_small_buf_release(buf
);
3422 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
3423 unsigned int *nbytes
, char **buf
, int *buf_type
)
3425 struct smb_rqst rqst
;
3426 int resp_buftype
, rc
= -EACCES
;
3427 struct smb2_read_plain_req
*req
= NULL
;
3428 struct smb2_read_rsp
*rsp
= NULL
;
3430 struct kvec rsp_iov
;
3431 unsigned int total_len
;
3432 int flags
= CIFS_LOG_ERROR
;
3433 struct cifs_ses
*ses
= io_parms
->tcon
->ses
;
3436 rc
= smb2_new_read_req((void **)&req
, &total_len
, io_parms
, NULL
, 0, 0);
3440 if (smb3_encryption_required(io_parms
->tcon
))
3441 flags
|= CIFS_TRANSFORM_REQ
;
3443 iov
[0].iov_base
= (char *)req
;
3444 iov
[0].iov_len
= total_len
;
3446 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3450 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3451 cifs_small_buf_release(req
);
3453 rsp
= (struct smb2_read_rsp
*)rsp_iov
.iov_base
;
3456 if (rc
!= -ENODATA
) {
3457 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
3458 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
3459 trace_smb3_read_err(xid
, req
->PersistentFileId
,
3460 io_parms
->tcon
->tid
, ses
->Suid
,
3461 io_parms
->offset
, io_parms
->length
,
3464 trace_smb3_read_done(xid
, req
->PersistentFileId
,
3465 io_parms
->tcon
->tid
, ses
->Suid
,
3466 io_parms
->offset
, 0);
3467 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3468 return rc
== -ENODATA
? 0 : rc
;
3470 trace_smb3_read_done(xid
, req
->PersistentFileId
,
3471 io_parms
->tcon
->tid
, ses
->Suid
,
3472 io_parms
->offset
, io_parms
->length
);
3474 *nbytes
= le32_to_cpu(rsp
->DataLength
);
3475 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
3476 (*nbytes
> io_parms
->length
)) {
3477 cifs_dbg(FYI
, "bad length %d for count %d\n",
3478 *nbytes
, io_parms
->length
);
3484 memcpy(*buf
, (char *)rsp
+ rsp
->DataOffset
, *nbytes
);
3485 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3486 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
3487 *buf
= rsp_iov
.iov_base
;
3488 if (resp_buftype
== CIFS_SMALL_BUFFER
)
3489 *buf_type
= CIFS_SMALL_BUFFER
;
3490 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
3491 *buf_type
= CIFS_LARGE_BUFFER
;
3497 * Check the mid_state and signature on received buffer (if any), and queue the
3498 * workqueue completion task.
3501 smb2_writev_callback(struct mid_q_entry
*mid
)
3503 struct cifs_writedata
*wdata
= mid
->callback_data
;
3504 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
3505 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
3506 unsigned int written
;
3507 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
3508 struct cifs_credits credits
= { .value
= 0, .instance
= 0 };
3510 switch (mid
->mid_state
) {
3511 case MID_RESPONSE_RECEIVED
:
3512 credits
.value
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
3513 credits
.instance
= server
->reconnect_instance
;
3514 wdata
->result
= smb2_check_receive(mid
, server
, 0);
3515 if (wdata
->result
!= 0)
3518 written
= le32_to_cpu(rsp
->DataLength
);
3520 * Mask off high 16 bits when bytes written as returned
3521 * by the server is greater than bytes requested by the
3522 * client. OS/2 servers are known to set incorrect
3525 if (written
> wdata
->bytes
)
3528 if (written
< wdata
->bytes
)
3529 wdata
->result
= -ENOSPC
;
3531 wdata
->bytes
= written
;
3533 case MID_REQUEST_SUBMITTED
:
3534 case MID_RETRY_NEEDED
:
3535 wdata
->result
= -EAGAIN
;
3537 case MID_RESPONSE_MALFORMED
:
3538 credits
.value
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
3539 credits
.instance
= server
->reconnect_instance
;
3542 wdata
->result
= -EIO
;
3545 #ifdef CONFIG_CIFS_SMB_DIRECT
3547 * If this wdata has a memory registered, the MR can be freed
3548 * The number of MRs available is limited, it's important to recover
3549 * used MR as soon as I/O is finished. Hold MR longer in the later
3550 * I/O process can possibly result in I/O deadlock due to lack of MR
3551 * to send request on I/O retry
3554 smbd_deregister_mr(wdata
->mr
);
3558 if (wdata
->result
) {
3559 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
3560 trace_smb3_write_err(0 /* no xid */,
3561 wdata
->cfile
->fid
.persistent_fid
,
3562 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
3563 wdata
->bytes
, wdata
->result
);
3565 trace_smb3_write_done(0 /* no xid */,
3566 wdata
->cfile
->fid
.persistent_fid
,
3567 tcon
->tid
, tcon
->ses
->Suid
,
3568 wdata
->offset
, wdata
->bytes
);
3570 queue_work(cifsiod_wq
, &wdata
->work
);
3571 DeleteMidQEntry(mid
);
3572 add_credits(server
, &credits
, 0);
3575 /* smb2_async_writev - send an async write, and set up mid to handle result */
3577 smb2_async_writev(struct cifs_writedata
*wdata
,
3578 void (*release
)(struct kref
*kref
))
3580 int rc
= -EACCES
, flags
= 0;
3581 struct smb2_write_req
*req
= NULL
;
3582 struct smb2_sync_hdr
*shdr
;
3583 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
3584 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
3586 struct smb_rqst rqst
= { };
3587 unsigned int total_len
;
3589 rc
= smb2_plain_req_init(SMB2_WRITE
, tcon
, (void **) &req
, &total_len
);
3593 if (smb3_encryption_required(tcon
))
3594 flags
|= CIFS_TRANSFORM_REQ
;
3596 shdr
= (struct smb2_sync_hdr
*)req
;
3597 shdr
->ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
3599 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
3600 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
3601 req
->WriteChannelInfoOffset
= 0;
3602 req
->WriteChannelInfoLength
= 0;
3604 req
->Offset
= cpu_to_le64(wdata
->offset
);
3605 req
->DataOffset
= cpu_to_le16(
3606 offsetof(struct smb2_write_req
, Buffer
));
3607 req
->RemainingBytes
= 0;
3609 trace_smb3_write_enter(0 /* xid */, wdata
->cfile
->fid
.persistent_fid
,
3610 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
, wdata
->bytes
);
3611 #ifdef CONFIG_CIFS_SMB_DIRECT
3613 * If we want to do a server RDMA read, fill in and append
3614 * smbd_buffer_descriptor_v1 to the end of write request
3616 if (server
->rdma
&& !server
->sign
&& wdata
->bytes
>=
3617 server
->smbd_conn
->rdma_readwrite_threshold
) {
3619 struct smbd_buffer_descriptor_v1
*v1
;
3620 bool need_invalidate
= server
->dialect
== SMB30_PROT_ID
;
3622 wdata
->mr
= smbd_register_mr(
3623 server
->smbd_conn
, wdata
->pages
,
3624 wdata
->nr_pages
, wdata
->page_offset
,
3625 wdata
->tailsz
, false, need_invalidate
);
3628 goto async_writev_out
;
3631 req
->DataOffset
= 0;
3632 if (wdata
->nr_pages
> 1)
3633 req
->RemainingBytes
=
3635 (wdata
->nr_pages
- 1) * wdata
->pagesz
-
3636 wdata
->page_offset
+ wdata
->tailsz
3639 req
->RemainingBytes
= cpu_to_le32(wdata
->tailsz
);
3640 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
3641 if (need_invalidate
)
3642 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
3643 req
->WriteChannelInfoOffset
=
3644 cpu_to_le16(offsetof(struct smb2_write_req
, Buffer
));
3645 req
->WriteChannelInfoLength
=
3646 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
3647 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
3648 v1
->offset
= cpu_to_le64(wdata
->mr
->mr
->iova
);
3649 v1
->token
= cpu_to_le32(wdata
->mr
->mr
->rkey
);
3650 v1
->length
= cpu_to_le32(wdata
->mr
->mr
->length
);
3653 iov
[0].iov_len
= total_len
- 1;
3654 iov
[0].iov_base
= (char *)req
;
3658 rqst
.rq_pages
= wdata
->pages
;
3659 rqst
.rq_offset
= wdata
->page_offset
;
3660 rqst
.rq_npages
= wdata
->nr_pages
;
3661 rqst
.rq_pagesz
= wdata
->pagesz
;
3662 rqst
.rq_tailsz
= wdata
->tailsz
;
3663 #ifdef CONFIG_CIFS_SMB_DIRECT
3665 iov
[0].iov_len
+= sizeof(struct smbd_buffer_descriptor_v1
);
3669 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
3670 wdata
->offset
, wdata
->bytes
);
3672 #ifdef CONFIG_CIFS_SMB_DIRECT
3673 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3675 req
->Length
= cpu_to_le32(wdata
->bytes
);
3677 req
->Length
= cpu_to_le32(wdata
->bytes
);
3680 if (wdata
->credits
.value
> 0) {
3681 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
3682 SMB2_MAX_BUFFER_SIZE
));
3683 shdr
->CreditRequest
=
3684 cpu_to_le16(le16_to_cpu(shdr
->CreditCharge
) + 1);
3686 rc
= adjust_credits(server
, &wdata
->credits
, wdata
->bytes
);
3688 goto async_writev_out
;
3690 flags
|= CIFS_HAS_CREDITS
;
3693 kref_get(&wdata
->refcount
);
3694 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, NULL
,
3695 wdata
, flags
, &wdata
->credits
);
3698 trace_smb3_write_err(0 /* no xid */, req
->PersistentFileId
,
3699 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
3701 kref_put(&wdata
->refcount
, release
);
3702 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
3706 cifs_small_buf_release(req
);
3711 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3712 * The length field from io_parms must be at least 1 and indicates a number of
3713 * elements with data to write that begins with position 1 in iov array. All
3714 * data length is specified by count.
3717 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
3718 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
3720 struct smb_rqst rqst
;
3722 struct smb2_write_req
*req
= NULL
;
3723 struct smb2_write_rsp
*rsp
= NULL
;
3725 struct kvec rsp_iov
;
3727 unsigned int total_len
;
3734 rc
= smb2_plain_req_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
,
3739 if (io_parms
->tcon
->ses
->server
== NULL
)
3740 return -ECONNABORTED
;
3742 if (smb3_encryption_required(io_parms
->tcon
))
3743 flags
|= CIFS_TRANSFORM_REQ
;
3745 req
->sync_hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
3747 req
->PersistentFileId
= io_parms
->persistent_fid
;
3748 req
->VolatileFileId
= io_parms
->volatile_fid
;
3749 req
->WriteChannelInfoOffset
= 0;
3750 req
->WriteChannelInfoLength
= 0;
3752 req
->Length
= cpu_to_le32(io_parms
->length
);
3753 req
->Offset
= cpu_to_le64(io_parms
->offset
);
3754 req
->DataOffset
= cpu_to_le16(
3755 offsetof(struct smb2_write_req
, Buffer
));
3756 req
->RemainingBytes
= 0;
3758 trace_smb3_write_enter(xid
, io_parms
->persistent_fid
,
3759 io_parms
->tcon
->tid
, io_parms
->tcon
->ses
->Suid
,
3760 io_parms
->offset
, io_parms
->length
);
3762 iov
[0].iov_base
= (char *)req
;
3764 iov
[0].iov_len
= total_len
- 1;
3766 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3768 rqst
.rq_nvec
= n_vec
+ 1;
3770 rc
= cifs_send_recv(xid
, io_parms
->tcon
->ses
, &rqst
,
3771 &resp_buftype
, flags
, &rsp_iov
);
3772 rsp
= (struct smb2_write_rsp
*)rsp_iov
.iov_base
;
3775 trace_smb3_write_err(xid
, req
->PersistentFileId
,
3776 io_parms
->tcon
->tid
,
3777 io_parms
->tcon
->ses
->Suid
,
3778 io_parms
->offset
, io_parms
->length
, rc
);
3779 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
3780 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
3782 *nbytes
= le32_to_cpu(rsp
->DataLength
);
3783 trace_smb3_write_done(xid
, req
->PersistentFileId
,
3784 io_parms
->tcon
->tid
,
3785 io_parms
->tcon
->ses
->Suid
,
3786 io_parms
->offset
, *nbytes
);
3789 cifs_small_buf_release(req
);
3790 free_rsp_buf(resp_buftype
, rsp
);
3795 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
3798 unsigned int entrycount
= 0;
3799 unsigned int next_offset
= 0;
3801 FILE_DIRECTORY_INFO
*dir_info
;
3803 if (bufstart
== NULL
)
3806 entryptr
= bufstart
;
3809 if (entryptr
+ next_offset
< entryptr
||
3810 entryptr
+ next_offset
> end_of_buf
||
3811 entryptr
+ next_offset
+ size
> end_of_buf
) {
3812 cifs_dbg(VFS
, "malformed search entry would overflow\n");
3816 entryptr
= entryptr
+ next_offset
;
3817 dir_info
= (FILE_DIRECTORY_INFO
*)entryptr
;
3819 len
= le32_to_cpu(dir_info
->FileNameLength
);
3820 if (entryptr
+ len
< entryptr
||
3821 entryptr
+ len
> end_of_buf
||
3822 entryptr
+ len
+ size
> end_of_buf
) {
3823 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
3828 *lastentry
= entryptr
;
3831 next_offset
= le32_to_cpu(dir_info
->NextEntryOffset
);
3843 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
3844 u64 persistent_fid
, u64 volatile_fid
, int index
,
3845 struct cifs_search_info
*srch_inf
)
3847 struct smb_rqst rqst
;
3848 struct smb2_query_directory_req
*req
;
3849 struct smb2_query_directory_rsp
*rsp
= NULL
;
3851 struct kvec rsp_iov
;
3854 int resp_buftype
= CIFS_NO_BUFFER
;
3855 unsigned char *bufptr
;
3856 struct TCP_Server_Info
*server
;
3857 struct cifs_ses
*ses
= tcon
->ses
;
3858 __le16 asteriks
= cpu_to_le16('*');
3860 unsigned int output_size
= CIFSMaxBufSize
;
3861 size_t info_buf_size
;
3863 unsigned int total_len
;
3865 if (ses
&& (ses
->server
))
3866 server
= ses
->server
;
3870 rc
= smb2_plain_req_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
,
3875 if (smb3_encryption_required(tcon
))
3876 flags
|= CIFS_TRANSFORM_REQ
;
3878 switch (srch_inf
->info_level
) {
3879 case SMB_FIND_FILE_DIRECTORY_INFO
:
3880 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
3881 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
3883 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
3884 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
3885 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
3888 cifs_dbg(VFS
, "info level %u isn't supported\n",
3889 srch_inf
->info_level
);
3894 req
->FileIndex
= cpu_to_le32(index
);
3895 req
->PersistentFileId
= persistent_fid
;
3896 req
->VolatileFileId
= volatile_fid
;
3899 bufptr
= req
->Buffer
;
3900 memcpy(bufptr
, &asteriks
, len
);
3902 req
->FileNameOffset
=
3903 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1);
3904 req
->FileNameLength
= cpu_to_le16(len
);
3906 * BB could be 30 bytes or so longer if we used SMB2 specific
3907 * buffer lengths, but this is safe and close enough.
3909 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
3910 output_size
= min_t(unsigned int, output_size
, 2 << 15);
3911 req
->OutputBufferLength
= cpu_to_le32(output_size
);
3913 iov
[0].iov_base
= (char *)req
;
3915 iov
[0].iov_len
= total_len
- 1;
3917 iov
[1].iov_base
= (char *)(req
->Buffer
);
3918 iov
[1].iov_len
= len
;
3920 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3924 trace_smb3_query_dir_enter(xid
, persistent_fid
, tcon
->tid
,
3925 tcon
->ses
->Suid
, index
, output_size
);
3927 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3928 cifs_small_buf_release(req
);
3929 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
.iov_base
;
3932 if (rc
== -ENODATA
&&
3933 rsp
->sync_hdr
.Status
== STATUS_NO_MORE_FILES
) {
3934 trace_smb3_query_dir_done(xid
, persistent_fid
,
3935 tcon
->tid
, tcon
->ses
->Suid
, index
, 0);
3936 srch_inf
->endOfSearch
= true;
3939 trace_smb3_query_dir_err(xid
, persistent_fid
, tcon
->tid
,
3940 tcon
->ses
->Suid
, index
, 0, rc
);
3941 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
3946 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
3947 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
3950 trace_smb3_query_dir_err(xid
, persistent_fid
, tcon
->tid
,
3951 tcon
->ses
->Suid
, index
, 0, rc
);
3955 srch_inf
->unicode
= true;
3957 if (srch_inf
->ntwrk_buf_start
) {
3958 if (srch_inf
->smallBuf
)
3959 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
3961 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
3963 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
3964 srch_inf
->srch_entries_start
= srch_inf
->last_entry
=
3965 (char *)rsp
+ le16_to_cpu(rsp
->OutputBufferOffset
);
3966 end_of_smb
= rsp_iov
.iov_len
+ (char *)rsp
;
3967 srch_inf
->entries_in_buffer
=
3968 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
3969 &srch_inf
->last_entry
, info_buf_size
);
3970 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
3971 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
3972 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
3973 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
3974 if (resp_buftype
== CIFS_LARGE_BUFFER
)
3975 srch_inf
->smallBuf
= false;
3976 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
3977 srch_inf
->smallBuf
= true;
3979 cifs_dbg(VFS
, "illegal search buffer type\n");
3981 trace_smb3_query_dir_done(xid
, persistent_fid
, tcon
->tid
,
3982 tcon
->ses
->Suid
, index
, srch_inf
->entries_in_buffer
);
3986 free_rsp_buf(resp_buftype
, rsp
);
3991 SMB2_set_info_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
,
3992 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, u8 info_class
,
3993 u8 info_type
, u32 additional_info
,
3994 void **data
, unsigned int *size
)
3996 struct smb2_set_info_req
*req
;
3997 struct kvec
*iov
= rqst
->rq_iov
;
3998 unsigned int i
, total_len
;
4001 rc
= smb2_plain_req_init(SMB2_SET_INFO
, tcon
, (void **) &req
, &total_len
);
4005 req
->sync_hdr
.ProcessId
= cpu_to_le32(pid
);
4006 req
->InfoType
= info_type
;
4007 req
->FileInfoClass
= info_class
;
4008 req
->PersistentFileId
= persistent_fid
;
4009 req
->VolatileFileId
= volatile_fid
;
4010 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
4013 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1);
4014 req
->BufferLength
= cpu_to_le32(*size
);
4016 memcpy(req
->Buffer
, *data
, *size
);
4019 iov
[0].iov_base
= (char *)req
;
4021 iov
[0].iov_len
= total_len
- 1;
4023 for (i
= 1; i
< rqst
->rq_nvec
; i
++) {
4024 le32_add_cpu(&req
->BufferLength
, size
[i
]);
4025 iov
[i
].iov_base
= (char *)data
[i
];
4026 iov
[i
].iov_len
= size
[i
];
4033 SMB2_set_info_free(struct smb_rqst
*rqst
)
4035 if (rqst
&& rqst
->rq_iov
)
4036 cifs_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
4040 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
4041 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, u8 info_class
,
4042 u8 info_type
, u32 additional_info
, unsigned int num
,
4043 void **data
, unsigned int *size
)
4045 struct smb_rqst rqst
;
4046 struct smb2_set_info_rsp
*rsp
= NULL
;
4048 struct kvec rsp_iov
;
4051 struct cifs_ses
*ses
= tcon
->ses
;
4054 if (!ses
|| !(ses
->server
))
4060 if (smb3_encryption_required(tcon
))
4061 flags
|= CIFS_TRANSFORM_REQ
;
4063 iov
= kmalloc_array(num
, sizeof(struct kvec
), GFP_KERNEL
);
4067 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4071 rc
= SMB2_set_info_init(tcon
, &rqst
, persistent_fid
, volatile_fid
, pid
,
4072 info_class
, info_type
, additional_info
,
4080 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
4082 SMB2_set_info_free(&rqst
);
4083 rsp
= (struct smb2_set_info_rsp
*)rsp_iov
.iov_base
;
4086 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
4087 trace_smb3_set_info_err(xid
, persistent_fid
, tcon
->tid
,
4088 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
4091 free_rsp_buf(resp_buftype
, rsp
);
4097 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
4098 u64 volatile_fid
, u32 pid
, __le64
*eof
)
4100 struct smb2_file_eof_info info
;
4104 info
.EndOfFile
= *eof
;
4107 size
= sizeof(struct smb2_file_eof_info
);
4109 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
4110 pid
, FILE_END_OF_FILE_INFORMATION
, SMB2_O_INFO_FILE
,
4111 0, 1, &data
, &size
);
4115 SMB2_set_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
4116 u64 persistent_fid
, u64 volatile_fid
,
4117 struct cifs_ntsd
*pnntsd
, int pacllen
, int aclflag
)
4119 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
4120 current
->tgid
, 0, SMB2_O_INFO_SECURITY
, aclflag
,
4121 1, (void **)&pnntsd
, &pacllen
);
4125 SMB2_set_ea(const unsigned int xid
, struct cifs_tcon
*tcon
,
4126 u64 persistent_fid
, u64 volatile_fid
,
4127 struct smb2_file_full_ea_info
*buf
, int len
)
4129 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
4130 current
->tgid
, FILE_FULL_EA_INFORMATION
, SMB2_O_INFO_FILE
,
4131 0, 1, (void **)&buf
, &len
);
4135 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
4136 const u64 persistent_fid
, const u64 volatile_fid
,
4139 struct smb_rqst rqst
;
4141 struct smb2_oplock_break
*req
= NULL
;
4142 struct cifs_ses
*ses
= tcon
->ses
;
4143 int flags
= CIFS_OBREAK_OP
;
4144 unsigned int total_len
;
4146 struct kvec rsp_iov
;
4149 cifs_dbg(FYI
, "SMB2_oplock_break\n");
4150 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
,
4155 if (smb3_encryption_required(tcon
))
4156 flags
|= CIFS_TRANSFORM_REQ
;
4158 req
->VolatileFid
= volatile_fid
;
4159 req
->PersistentFid
= persistent_fid
;
4160 req
->OplockLevel
= oplock_level
;
4161 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
4163 flags
|= CIFS_NO_RESP
;
4165 iov
[0].iov_base
= (char *)req
;
4166 iov
[0].iov_len
= total_len
;
4168 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4172 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
4173 cifs_small_buf_release(req
);
4176 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
4177 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
4184 smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
4185 struct kstatfs
*kst
)
4187 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
4188 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
4189 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
4190 kst
->f_bfree
= kst
->f_bavail
=
4191 le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
4196 copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO
*response_data
,
4197 struct kstatfs
*kst
)
4199 kst
->f_bsize
= le32_to_cpu(response_data
->BlockSize
);
4200 kst
->f_blocks
= le64_to_cpu(response_data
->TotalBlocks
);
4201 kst
->f_bfree
= le64_to_cpu(response_data
->BlocksAvail
);
4202 if (response_data
->UserBlocksAvail
== cpu_to_le64(-1))
4203 kst
->f_bavail
= kst
->f_bfree
;
4205 kst
->f_bavail
= le64_to_cpu(response_data
->UserBlocksAvail
);
4206 if (response_data
->TotalFileNodes
!= cpu_to_le64(-1))
4207 kst
->f_files
= le64_to_cpu(response_data
->TotalFileNodes
);
4208 if (response_data
->FreeFileNodes
!= cpu_to_le64(-1))
4209 kst
->f_ffree
= le64_to_cpu(response_data
->FreeFileNodes
);
4215 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
4216 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
4219 struct smb2_query_info_req
*req
;
4220 unsigned int total_len
;
4222 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
4224 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
4227 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
,
4232 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
4233 req
->FileInfoClass
= level
;
4234 req
->PersistentFileId
= persistent_fid
;
4235 req
->VolatileFileId
= volatile_fid
;
4237 req
->InputBufferOffset
=
4238 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1);
4239 req
->OutputBufferLength
= cpu_to_le32(
4240 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1);
4242 iov
->iov_base
= (char *)req
;
4243 iov
->iov_len
= total_len
;
4248 SMB311_posix_qfs_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
4249 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
4251 struct smb_rqst rqst
;
4252 struct smb2_query_info_rsp
*rsp
= NULL
;
4254 struct kvec rsp_iov
;
4257 struct cifs_ses
*ses
= tcon
->ses
;
4258 FILE_SYSTEM_POSIX_INFO
*info
= NULL
;
4261 rc
= build_qfs_info_req(&iov
, tcon
, FS_POSIX_INFORMATION
,
4262 sizeof(FILE_SYSTEM_POSIX_INFO
),
4263 persistent_fid
, volatile_fid
);
4267 if (smb3_encryption_required(tcon
))
4268 flags
|= CIFS_TRANSFORM_REQ
;
4270 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4274 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4275 cifs_small_buf_release(iov
.iov_base
);
4277 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4278 goto posix_qfsinf_exit
;
4280 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4282 info
= (FILE_SYSTEM_POSIX_INFO
*)(
4283 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
4284 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
4285 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
4286 sizeof(FILE_SYSTEM_POSIX_INFO
));
4288 copy_posix_fs_info_to_kstatfs(info
, fsdata
);
4291 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4296 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
4297 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
4299 struct smb_rqst rqst
;
4300 struct smb2_query_info_rsp
*rsp
= NULL
;
4302 struct kvec rsp_iov
;
4305 struct cifs_ses
*ses
= tcon
->ses
;
4306 struct smb2_fs_full_size_info
*info
= NULL
;
4309 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
4310 sizeof(struct smb2_fs_full_size_info
),
4311 persistent_fid
, volatile_fid
);
4315 if (smb3_encryption_required(tcon
))
4316 flags
|= CIFS_TRANSFORM_REQ
;
4318 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4322 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4323 cifs_small_buf_release(iov
.iov_base
);
4325 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4328 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4330 info
= (struct smb2_fs_full_size_info
*)(
4331 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
4332 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
4333 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
4334 sizeof(struct smb2_fs_full_size_info
));
4336 smb2_copy_fs_info_to_kstatfs(info
, fsdata
);
4339 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4344 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
4345 u64 persistent_fid
, u64 volatile_fid
, int level
)
4347 struct smb_rqst rqst
;
4348 struct smb2_query_info_rsp
*rsp
= NULL
;
4350 struct kvec rsp_iov
;
4352 int resp_buftype
, max_len
, min_len
;
4353 struct cifs_ses
*ses
= tcon
->ses
;
4354 unsigned int rsp_len
, offset
;
4357 if (level
== FS_DEVICE_INFORMATION
) {
4358 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
4359 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
4360 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
4361 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
4362 min_len
= MIN_FS_ATTR_INFO_SIZE
;
4363 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
4364 max_len
= sizeof(struct smb3_fs_ss_info
);
4365 min_len
= sizeof(struct smb3_fs_ss_info
);
4366 } else if (level
== FS_VOLUME_INFORMATION
) {
4367 max_len
= sizeof(struct smb3_fs_vol_info
) + MAX_VOL_LABEL_LEN
;
4368 min_len
= sizeof(struct smb3_fs_vol_info
);
4370 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
4374 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
4375 persistent_fid
, volatile_fid
);
4379 if (smb3_encryption_required(tcon
))
4380 flags
|= CIFS_TRANSFORM_REQ
;
4382 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4386 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4387 cifs_small_buf_release(iov
.iov_base
);
4389 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4392 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4394 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
4395 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
4396 rc
= smb2_validate_iov(offset
, rsp_len
, &rsp_iov
, min_len
);
4400 if (level
== FS_ATTRIBUTE_INFORMATION
)
4401 memcpy(&tcon
->fsAttrInfo
, offset
4402 + (char *)rsp
, min_t(unsigned int,
4404 else if (level
== FS_DEVICE_INFORMATION
)
4405 memcpy(&tcon
->fsDevInfo
, offset
4406 + (char *)rsp
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
4407 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
4408 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
4409 (offset
+ (char *)rsp
);
4410 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
4411 tcon
->perf_sector_size
=
4412 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
4413 } else if (level
== FS_VOLUME_INFORMATION
) {
4414 struct smb3_fs_vol_info
*vol_info
= (struct smb3_fs_vol_info
*)
4415 (offset
+ (char *)rsp
);
4416 tcon
->vol_serial_number
= vol_info
->VolumeSerialNumber
;
4417 tcon
->vol_create_time
= vol_info
->VolumeCreationTime
;
4421 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4426 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
4427 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
4428 const __u32 num_lock
, struct smb2_lock_element
*buf
)
4430 struct smb_rqst rqst
;
4432 struct smb2_lock_req
*req
= NULL
;
4434 struct kvec rsp_iov
;
4437 int flags
= CIFS_NO_RESP
;
4438 unsigned int total_len
;
4440 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
4442 rc
= smb2_plain_req_init(SMB2_LOCK
, tcon
, (void **) &req
, &total_len
);
4446 if (smb3_encryption_required(tcon
))
4447 flags
|= CIFS_TRANSFORM_REQ
;
4449 req
->sync_hdr
.ProcessId
= cpu_to_le32(pid
);
4450 req
->LockCount
= cpu_to_le16(num_lock
);
4452 req
->PersistentFileId
= persist_fid
;
4453 req
->VolatileFileId
= volatile_fid
;
4455 count
= num_lock
* sizeof(struct smb2_lock_element
);
4457 iov
[0].iov_base
= (char *)req
;
4458 iov
[0].iov_len
= total_len
- sizeof(struct smb2_lock_element
);
4459 iov
[1].iov_base
= (char *)buf
;
4460 iov
[1].iov_len
= count
;
4462 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
4464 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4468 rc
= cifs_send_recv(xid
, tcon
->ses
, &rqst
, &resp_buf_type
, flags
,
4470 cifs_small_buf_release(req
);
4472 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
4473 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
4474 trace_smb3_lock_err(xid
, persist_fid
, tcon
->tid
,
4475 tcon
->ses
->Suid
, rc
);
4482 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
4483 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
4484 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
4487 struct smb2_lock_element lock
;
4489 lock
.Offset
= cpu_to_le64(offset
);
4490 lock
.Length
= cpu_to_le64(length
);
4491 lock
.Flags
= cpu_to_le32(lock_flags
);
4492 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
4493 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
4495 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
4499 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
4500 __u8
*lease_key
, const __le32 lease_state
)
4502 struct smb_rqst rqst
;
4504 struct smb2_lease_ack
*req
= NULL
;
4505 struct cifs_ses
*ses
= tcon
->ses
;
4506 int flags
= CIFS_OBREAK_OP
;
4507 unsigned int total_len
;
4509 struct kvec rsp_iov
;
4511 __u64
*please_key_high
;
4512 __u64
*please_key_low
;
4514 cifs_dbg(FYI
, "SMB2_lease_break\n");
4515 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
,
4520 if (smb3_encryption_required(tcon
))
4521 flags
|= CIFS_TRANSFORM_REQ
;
4523 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
4524 req
->StructureSize
= cpu_to_le16(36);
4527 memcpy(req
->LeaseKey
, lease_key
, 16);
4528 req
->LeaseState
= lease_state
;
4530 flags
|= CIFS_NO_RESP
;
4532 iov
[0].iov_base
= (char *)req
;
4533 iov
[0].iov_len
= total_len
;
4535 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4539 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
4540 cifs_small_buf_release(req
);
4542 please_key_low
= (__u64
*)lease_key
;
4543 please_key_high
= (__u64
*)(lease_key
+8);
4545 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
4546 trace_smb3_lease_err(le32_to_cpu(lease_state
), tcon
->tid
,
4547 ses
->Suid
, *please_key_low
, *please_key_high
, rc
);
4548 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);
4550 trace_smb3_lease_done(le32_to_cpu(lease_state
), tcon
->tid
,
4551 ses
->Suid
, *please_key_low
, *please_key_high
);