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
, (char **)&pneg_rsp
, &rsplen
);
1006 if (rc
== -EOPNOTSUPP
) {
1008 * Old Windows versions or Netapp SMB server can return
1009 * not supported error. Client should accept it.
1011 cifs_dbg(VFS
, "Server does not support validate negotiate\n");
1013 } else if (rc
!= 0) {
1014 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
1016 goto out_free_inbuf
;
1020 if (rsplen
!= sizeof(*pneg_rsp
)) {
1021 cifs_dbg(VFS
, "invalid protocol negotiate response size: %d\n",
1024 /* relax check since Mac returns max bufsize allowed on ioctl */
1025 if (rsplen
> CIFSMaxBufSize
|| rsplen
< sizeof(*pneg_rsp
))
1029 /* check validate negotiate info response matches what we got earlier */
1030 if (pneg_rsp
->Dialect
!= cpu_to_le16(tcon
->ses
->server
->dialect
))
1033 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
1036 /* do not validate server guid because not saved at negprot time yet */
1038 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
1039 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
1042 /* validate negotiate successful */
1044 cifs_dbg(FYI
, "validate negotiate info successful\n");
1048 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
1057 smb2_select_sectype(struct TCP_Server_Info
*server
, enum securityEnum requested
)
1059 switch (requested
) {
1066 if (server
->sec_ntlmssp
&&
1067 (global_secflags
& CIFSSEC_MAY_NTLMSSP
))
1069 if ((server
->sec_kerberos
|| server
->sec_mskerberos
) &&
1070 (global_secflags
& CIFSSEC_MAY_KRB5
))
1078 struct SMB2_sess_data
{
1080 struct cifs_ses
*ses
;
1081 struct nls_table
*nls_cp
;
1082 void (*func
)(struct SMB2_sess_data
*);
1084 u64 previous_session
;
1086 /* we will send the SMB in three pieces:
1087 * a fixed length beginning part, an optional
1088 * SPNEGO blob (which can be zero length), and a
1089 * last part which will include the strings
1090 * and rest of bcc area. This allows us to avoid
1091 * a large buffer 17K allocation
1098 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
1101 struct cifs_ses
*ses
= sess_data
->ses
;
1102 struct smb2_sess_setup_req
*req
;
1103 struct TCP_Server_Info
*server
= ses
->server
;
1104 unsigned int total_len
;
1106 rc
= smb2_plain_req_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
,
1111 /* First session, not a reauthenticate */
1112 req
->sync_hdr
.SessionId
= 0;
1114 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
1115 req
->PreviousSessionId
= sess_data
->previous_session
;
1117 req
->Flags
= 0; /* MBZ */
1119 /* enough to enable echos and oplocks and one max size write */
1120 req
->sync_hdr
.CreditRequest
= cpu_to_le16(130);
1122 /* only one of SMB2 signing flags may be set in SMB2 request */
1124 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
1125 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
1126 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
1128 req
->SecurityMode
= 0;
1130 req
->Capabilities
= 0;
1131 req
->Channel
= 0; /* MBZ */
1133 sess_data
->iov
[0].iov_base
= (char *)req
;
1135 sess_data
->iov
[0].iov_len
= total_len
- 1;
1137 * This variable will be used to clear the buffer
1138 * allocated above in case of any error in the calling function.
1140 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
1146 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
1148 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
1149 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1153 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
1156 struct smb_rqst rqst
;
1157 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
1158 struct kvec rsp_iov
= { NULL
, 0 };
1160 /* Testing shows that buffer offset must be at location of Buffer[0] */
1161 req
->SecurityBufferOffset
=
1162 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) - 1 /* pad */);
1163 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
1165 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1166 rqst
.rq_iov
= sess_data
->iov
;
1169 /* BB add code to build os and lm fields */
1170 rc
= cifs_send_recv(sess_data
->xid
, sess_data
->ses
,
1172 &sess_data
->buf0_type
,
1173 CIFS_LOG_ERROR
| CIFS_NEG_OP
, &rsp_iov
);
1174 cifs_small_buf_release(sess_data
->iov
[0].iov_base
);
1175 memcpy(&sess_data
->iov
[0], &rsp_iov
, sizeof(struct kvec
));
1181 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
1184 struct cifs_ses
*ses
= sess_data
->ses
;
1186 mutex_lock(&ses
->server
->srv_mutex
);
1187 if (ses
->server
->ops
->generate_signingkey
) {
1188 rc
= ses
->server
->ops
->generate_signingkey(ses
);
1191 "SMB3 session key generation failed\n");
1192 mutex_unlock(&ses
->server
->srv_mutex
);
1196 if (!ses
->server
->session_estab
) {
1197 ses
->server
->sequence_number
= 0x2;
1198 ses
->server
->session_estab
= true;
1200 mutex_unlock(&ses
->server
->srv_mutex
);
1202 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
1203 spin_lock(&GlobalMid_Lock
);
1204 ses
->status
= CifsGood
;
1205 ses
->need_reconnect
= false;
1206 spin_unlock(&GlobalMid_Lock
);
1210 #ifdef CONFIG_CIFS_UPCALL
1212 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1215 struct cifs_ses
*ses
= sess_data
->ses
;
1216 struct cifs_spnego_msg
*msg
;
1217 struct key
*spnego_key
= NULL
;
1218 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1220 rc
= SMB2_sess_alloc_buffer(sess_data
);
1224 spnego_key
= cifs_get_spnego_key(ses
);
1225 if (IS_ERR(spnego_key
)) {
1226 rc
= PTR_ERR(spnego_key
);
1231 msg
= spnego_key
->payload
.data
[0];
1233 * check version field to make sure that cifs.upcall is
1234 * sending us a response in an expected form
1236 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
1238 "bad cifs.upcall version. Expected %d got %d",
1239 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
1241 goto out_put_spnego_key
;
1244 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
1246 if (!ses
->auth_key
.response
) {
1248 "Kerberos can't allocate (%u bytes) memory",
1251 goto out_put_spnego_key
;
1253 ses
->auth_key
.len
= msg
->sesskey_len
;
1255 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
1256 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
1258 rc
= SMB2_sess_sendreceive(sess_data
);
1260 goto out_put_spnego_key
;
1262 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1263 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1265 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1267 rc
= SMB2_sess_establish_session(sess_data
);
1269 key_invalidate(spnego_key
);
1270 key_put(spnego_key
);
1272 sess_data
->result
= rc
;
1273 sess_data
->func
= NULL
;
1274 SMB2_sess_free_buffer(sess_data
);
1278 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1280 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
1281 sess_data
->result
= -EOPNOTSUPP
;
1282 sess_data
->func
= NULL
;
1287 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
1290 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
1293 struct cifs_ses
*ses
= sess_data
->ses
;
1294 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1295 char *ntlmssp_blob
= NULL
;
1296 bool use_spnego
= false; /* else use raw ntlmssp */
1297 u16 blob_length
= 0;
1300 * If memory allocation is successful, caller of this function
1303 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
1304 if (!ses
->ntlmssp
) {
1308 ses
->ntlmssp
->sesskey_per_smbsess
= true;
1310 rc
= SMB2_sess_alloc_buffer(sess_data
);
1314 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
1316 if (ntlmssp_blob
== NULL
) {
1321 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
1323 /* BB eventually need to add this */
1324 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1328 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
1329 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1331 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1332 sess_data
->iov
[1].iov_len
= blob_length
;
1334 rc
= SMB2_sess_sendreceive(sess_data
);
1335 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1337 /* If true, rc here is expected and not an error */
1338 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
1339 rsp
->sync_hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
1345 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) !=
1346 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
1347 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
1348 le16_to_cpu(rsp
->SecurityBufferOffset
));
1352 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
1353 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
1357 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
1360 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1361 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1364 kfree(ntlmssp_blob
);
1365 SMB2_sess_free_buffer(sess_data
);
1367 sess_data
->result
= 0;
1368 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
1372 kfree(ses
->ntlmssp
);
1373 ses
->ntlmssp
= NULL
;
1374 sess_data
->result
= rc
;
1375 sess_data
->func
= NULL
;
1379 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
1382 struct cifs_ses
*ses
= sess_data
->ses
;
1383 struct smb2_sess_setup_req
*req
;
1384 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1385 unsigned char *ntlmssp_blob
= NULL
;
1386 bool use_spnego
= false; /* else use raw ntlmssp */
1387 u16 blob_length
= 0;
1389 rc
= SMB2_sess_alloc_buffer(sess_data
);
1393 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
1394 req
->sync_hdr
.SessionId
= ses
->Suid
;
1396 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
, ses
,
1399 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
1404 /* BB eventually need to add this */
1405 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1409 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1410 sess_data
->iov
[1].iov_len
= blob_length
;
1412 rc
= SMB2_sess_sendreceive(sess_data
);
1416 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1418 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1419 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1421 rc
= SMB2_sess_establish_session(sess_data
);
1423 kfree(ntlmssp_blob
);
1424 SMB2_sess_free_buffer(sess_data
);
1425 kfree(ses
->ntlmssp
);
1426 ses
->ntlmssp
= NULL
;
1427 sess_data
->result
= rc
;
1428 sess_data
->func
= NULL
;
1432 SMB2_select_sec(struct cifs_ses
*ses
, struct SMB2_sess_data
*sess_data
)
1436 type
= smb2_select_sectype(ses
->server
, ses
->sectype
);
1437 cifs_dbg(FYI
, "sess setup type %d\n", type
);
1438 if (type
== Unspecified
) {
1440 "Unable to select appropriate authentication method!");
1446 sess_data
->func
= SMB2_auth_kerberos
;
1449 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
1452 cifs_dbg(VFS
, "secType %d not supported!\n", type
);
1460 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
1461 const struct nls_table
*nls_cp
)
1464 struct TCP_Server_Info
*server
= ses
->server
;
1465 struct SMB2_sess_data
*sess_data
;
1467 cifs_dbg(FYI
, "Session Setup\n");
1470 WARN(1, "%s: server is NULL!\n", __func__
);
1474 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
1478 rc
= SMB2_select_sec(ses
, sess_data
);
1481 sess_data
->xid
= xid
;
1482 sess_data
->ses
= ses
;
1483 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1484 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1485 sess_data
->previous_session
= ses
->Suid
;
1488 * Initialize the session hash with the server one.
1490 memcpy(ses
->preauth_sha_hash
, ses
->server
->preauth_sha_hash
,
1491 SMB2_PREAUTH_HASH_SIZE
);
1493 while (sess_data
->func
)
1494 sess_data
->func(sess_data
);
1496 if ((ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
) && (ses
->sign
))
1497 cifs_dbg(VFS
, "signing requested but authenticated as guest\n");
1498 rc
= sess_data
->result
;
1505 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1507 struct smb_rqst rqst
;
1508 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1510 struct TCP_Server_Info
*server
;
1512 unsigned int total_len
;
1514 struct kvec rsp_iov
;
1517 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1519 if (ses
&& (ses
->server
))
1520 server
= ses
->server
;
1524 /* no need to send SMB logoff if uid already closed due to reconnect */
1525 if (ses
->need_reconnect
)
1526 goto smb2_session_already_dead
;
1528 rc
= smb2_plain_req_init(SMB2_LOGOFF
, NULL
, (void **) &req
, &total_len
);
1532 /* since no tcon, smb2_init can not do this, so do here */
1533 req
->sync_hdr
.SessionId
= ses
->Suid
;
1535 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
1536 flags
|= CIFS_TRANSFORM_REQ
;
1537 else if (server
->sign
)
1538 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1540 flags
|= CIFS_NO_RESP
;
1542 iov
[0].iov_base
= (char *)req
;
1543 iov
[0].iov_len
= total_len
;
1545 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1549 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
1550 cifs_small_buf_release(req
);
1552 * No tcon so can't do
1553 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1556 smb2_session_already_dead
:
1560 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1562 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1565 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1567 /* These are similar values to what Windows uses */
1568 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1570 tcon
->max_chunks
= 256;
1571 tcon
->max_bytes_chunk
= 1048576;
1572 tcon
->max_bytes_copy
= 16777216;
1576 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1577 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1579 struct smb_rqst rqst
;
1580 struct smb2_tree_connect_req
*req
;
1581 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1583 struct kvec rsp_iov
= { NULL
, 0 };
1587 __le16
*unc_path
= NULL
;
1589 unsigned int total_len
;
1591 cifs_dbg(FYI
, "TCON\n");
1593 if (!(ses
->server
) || !tree
)
1596 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1597 if (unc_path
== NULL
)
1600 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1602 if (unc_path_len
< 2) {
1607 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1609 atomic_set(&tcon
->num_remote_opens
, 0);
1610 rc
= smb2_plain_req_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
,
1617 if (smb3_encryption_required(tcon
))
1618 flags
|= CIFS_TRANSFORM_REQ
;
1620 iov
[0].iov_base
= (char *)req
;
1622 iov
[0].iov_len
= total_len
- 1;
1624 /* Testing shows that buffer offset must be at location of Buffer[0] */
1625 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1627 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1628 iov
[1].iov_base
= unc_path
;
1629 iov
[1].iov_len
= unc_path_len
;
1631 /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
1632 if ((ses
->server
->dialect
== SMB311_PROT_ID
) &&
1633 !smb3_encryption_required(tcon
))
1634 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1636 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1640 /* Need 64 for max size write so ask for more in case not there yet */
1641 req
->sync_hdr
.CreditRequest
= cpu_to_le16(64);
1643 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
1644 cifs_small_buf_release(req
);
1645 rsp
= (struct smb2_tree_connect_rsp
*)rsp_iov
.iov_base
;
1646 trace_smb3_tcon(xid
, tcon
->tid
, ses
->Suid
, tree
, rc
);
1649 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1650 tcon
->need_reconnect
= true;
1652 goto tcon_error_exit
;
1655 switch (rsp
->ShareType
) {
1656 case SMB2_SHARE_TYPE_DISK
:
1657 cifs_dbg(FYI
, "connection to disk share\n");
1659 case SMB2_SHARE_TYPE_PIPE
:
1661 cifs_dbg(FYI
, "connection to pipe share\n");
1663 case SMB2_SHARE_TYPE_PRINT
:
1665 cifs_dbg(FYI
, "connection to printer\n");
1668 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1670 goto tcon_error_exit
;
1673 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1674 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1675 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1676 tcon
->tidStatus
= CifsGood
;
1677 tcon
->need_reconnect
= false;
1678 tcon
->tid
= rsp
->sync_hdr
.TreeId
;
1679 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1681 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1682 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1683 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1686 !(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
1687 cifs_dbg(VFS
, "Encryption is requested but not supported\n");
1689 init_copy_chunk_defaults(tcon
);
1690 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1691 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1694 free_rsp_buf(resp_buftype
, rsp
);
1699 if (rsp
&& rsp
->sync_hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1700 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1706 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1708 struct smb_rqst rqst
;
1709 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1711 struct cifs_ses
*ses
= tcon
->ses
;
1713 unsigned int total_len
;
1715 struct kvec rsp_iov
;
1718 cifs_dbg(FYI
, "Tree Disconnect\n");
1720 if (!ses
|| !(ses
->server
))
1723 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1726 rc
= smb2_plain_req_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
,
1731 if (smb3_encryption_required(tcon
))
1732 flags
|= CIFS_TRANSFORM_REQ
;
1734 flags
|= CIFS_NO_RESP
;
1736 iov
[0].iov_base
= (char *)req
;
1737 iov
[0].iov_len
= total_len
;
1739 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1743 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
1744 cifs_small_buf_release(req
);
1746 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1752 static struct create_durable
*
1753 create_durable_buf(void)
1755 struct create_durable
*buf
;
1757 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1761 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1762 (struct create_durable
, Data
));
1763 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1764 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1765 (struct create_durable
, Name
));
1766 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1767 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1775 static struct create_durable
*
1776 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1778 struct create_durable
*buf
;
1780 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1784 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1785 (struct create_durable
, Data
));
1786 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1787 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1788 (struct create_durable
, Name
));
1789 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1790 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1791 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1792 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1801 smb2_parse_lease_state(struct TCP_Server_Info
*server
,
1802 struct smb2_create_rsp
*rsp
,
1803 unsigned int *epoch
, char *lease_key
)
1806 struct create_context
*cc
;
1808 unsigned int remaining
;
1811 data_offset
= (char *)rsp
+ le32_to_cpu(rsp
->CreateContextsOffset
);
1812 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
1813 cc
= (struct create_context
*)data_offset
;
1814 while (remaining
>= sizeof(struct create_context
)) {
1815 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1816 if (le16_to_cpu(cc
->NameLength
) == 4 &&
1817 strncmp(name
, "RqLs", 4) == 0)
1818 return server
->ops
->parse_lease_buf(cc
, epoch
,
1821 next
= le32_to_cpu(cc
->Next
);
1825 cc
= (struct create_context
*)((char *)cc
+ next
);
1832 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1833 unsigned int *num_iovec
, u8
*lease_key
, __u8
*oplock
)
1835 struct smb2_create_req
*req
= iov
[0].iov_base
;
1836 unsigned int num
= *num_iovec
;
1838 iov
[num
].iov_base
= server
->ops
->create_lease_buf(lease_key
, *oplock
);
1839 if (iov
[num
].iov_base
== NULL
)
1841 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1842 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1843 if (!req
->CreateContextsOffset
)
1844 req
->CreateContextsOffset
= cpu_to_le32(
1845 sizeof(struct smb2_create_req
) +
1846 iov
[num
- 1].iov_len
);
1847 le32_add_cpu(&req
->CreateContextsLength
,
1848 server
->vals
->create_lease_size
);
1849 *num_iovec
= num
+ 1;
1853 static struct create_durable_v2
*
1854 create_durable_v2_buf(struct cifs_fid
*pfid
)
1856 struct create_durable_v2
*buf
;
1858 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1862 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1863 (struct create_durable_v2
, dcontext
));
1864 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1865 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1866 (struct create_durable_v2
, Name
));
1867 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1869 buf
->dcontext
.Timeout
= 0; /* Should this be configurable by workload */
1870 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1871 generate_random_uuid(buf
->dcontext
.CreateGuid
);
1872 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1874 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1882 static struct create_durable_handle_reconnect_v2
*
1883 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1885 struct create_durable_handle_reconnect_v2
*buf
;
1887 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1892 buf
->ccontext
.DataOffset
=
1893 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1895 buf
->ccontext
.DataLength
=
1896 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1897 buf
->ccontext
.NameOffset
=
1898 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1900 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1902 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1903 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1904 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1905 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1907 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1916 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1917 struct cifs_open_parms
*oparms
)
1919 struct smb2_create_req
*req
= iov
[0].iov_base
;
1920 unsigned int num
= *num_iovec
;
1922 iov
[num
].iov_base
= create_durable_v2_buf(oparms
->fid
);
1923 if (iov
[num
].iov_base
== NULL
)
1925 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1926 if (!req
->CreateContextsOffset
)
1927 req
->CreateContextsOffset
=
1928 cpu_to_le32(sizeof(struct smb2_create_req
) +
1930 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1931 *num_iovec
= num
+ 1;
1936 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1937 struct cifs_open_parms
*oparms
)
1939 struct smb2_create_req
*req
= iov
[0].iov_base
;
1940 unsigned int num
= *num_iovec
;
1942 /* indicate that we don't need to relock the file */
1943 oparms
->reconnect
= false;
1945 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1946 if (iov
[num
].iov_base
== NULL
)
1948 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1949 if (!req
->CreateContextsOffset
)
1950 req
->CreateContextsOffset
=
1951 cpu_to_le32(sizeof(struct smb2_create_req
) +
1953 le32_add_cpu(&req
->CreateContextsLength
,
1954 sizeof(struct create_durable_handle_reconnect_v2
));
1955 *num_iovec
= num
+ 1;
1960 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1961 struct cifs_open_parms
*oparms
, bool use_persistent
)
1963 struct smb2_create_req
*req
= iov
[0].iov_base
;
1964 unsigned int num
= *num_iovec
;
1966 if (use_persistent
) {
1967 if (oparms
->reconnect
)
1968 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1971 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1974 if (oparms
->reconnect
) {
1975 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1976 /* indicate that we don't need to relock the file */
1977 oparms
->reconnect
= false;
1979 iov
[num
].iov_base
= create_durable_buf();
1980 if (iov
[num
].iov_base
== NULL
)
1982 iov
[num
].iov_len
= sizeof(struct create_durable
);
1983 if (!req
->CreateContextsOffset
)
1984 req
->CreateContextsOffset
=
1985 cpu_to_le32(sizeof(struct smb2_create_req
) +
1987 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1988 *num_iovec
= num
+ 1;
1992 /* See MS-SMB2 2.2.13.2.7 */
1993 static struct crt_twarp_ctxt
*
1994 create_twarp_buf(__u64 timewarp
)
1996 struct crt_twarp_ctxt
*buf
;
1998 buf
= kzalloc(sizeof(struct crt_twarp_ctxt
), GFP_KERNEL
);
2002 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
2003 (struct crt_twarp_ctxt
, Timestamp
));
2004 buf
->ccontext
.DataLength
= cpu_to_le32(8);
2005 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
2006 (struct crt_twarp_ctxt
, Name
));
2007 buf
->ccontext
.NameLength
= cpu_to_le16(4);
2008 /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
2013 buf
->Timestamp
= cpu_to_le64(timewarp
);
2017 /* See MS-SMB2 2.2.13.2.7 */
2019 add_twarp_context(struct kvec
*iov
, unsigned int *num_iovec
, __u64 timewarp
)
2021 struct smb2_create_req
*req
= iov
[0].iov_base
;
2022 unsigned int num
= *num_iovec
;
2024 iov
[num
].iov_base
= create_twarp_buf(timewarp
);
2025 if (iov
[num
].iov_base
== NULL
)
2027 iov
[num
].iov_len
= sizeof(struct crt_twarp_ctxt
);
2028 if (!req
->CreateContextsOffset
)
2029 req
->CreateContextsOffset
= cpu_to_le32(
2030 sizeof(struct smb2_create_req
) +
2031 iov
[num
- 1].iov_len
);
2032 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct crt_twarp_ctxt
));
2033 *num_iovec
= num
+ 1;
2038 alloc_path_with_tree_prefix(__le16
**out_path
, int *out_size
, int *out_len
,
2039 const char *treename
, const __le16
*path
)
2041 int treename_len
, path_len
;
2042 struct nls_table
*cp
;
2043 const __le16 sep
[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
2048 treename_len
= strlen(treename
);
2049 if (treename_len
< 2 || !(treename
[0] == '\\' && treename
[1] == '\\'))
2055 path_len
= UniStrnlen((wchar_t *)path
, PATH_MAX
);
2058 * make room for one path separator between the treename and
2061 *out_len
= treename_len
+ 1 + path_len
;
2064 * final path needs to be null-terminated UTF16 with a
2068 *out_size
= roundup((*out_len
+1)*2, 8);
2069 *out_path
= kzalloc(*out_size
, GFP_KERNEL
);
2073 cp
= load_nls_default();
2074 cifs_strtoUTF16(*out_path
, treename
, treename_len
, cp
);
2075 UniStrcat(*out_path
, sep
);
2076 UniStrcat(*out_path
, path
);
2082 int smb311_posix_mkdir(const unsigned int xid
, struct inode
*inode
,
2083 umode_t mode
, struct cifs_tcon
*tcon
,
2084 const char *full_path
,
2085 struct cifs_sb_info
*cifs_sb
)
2087 struct smb_rqst rqst
;
2088 struct smb2_create_req
*req
;
2089 struct smb2_create_rsp
*rsp
= NULL
;
2090 struct cifs_ses
*ses
= tcon
->ses
;
2091 struct kvec iov
[3]; /* make sure at least one for each open context */
2092 struct kvec rsp_iov
= {NULL
, 0};
2095 __le16
*copy_path
= NULL
;
2098 unsigned int n_iov
= 2;
2099 __u32 file_attributes
= 0;
2100 char *pc_buf
= NULL
;
2102 unsigned int total_len
;
2103 __le16
*utf16_path
= NULL
;
2105 cifs_dbg(FYI
, "mkdir\n");
2107 /* resource #1: path allocation */
2108 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
2112 if (!ses
|| !(ses
->server
)) {
2117 /* resource #2: request */
2118 rc
= smb2_plain_req_init(SMB2_CREATE
, tcon
, (void **) &req
, &total_len
);
2123 if (smb3_encryption_required(tcon
))
2124 flags
|= CIFS_TRANSFORM_REQ
;
2126 req
->ImpersonationLevel
= IL_IMPERSONATION
;
2127 req
->DesiredAccess
= cpu_to_le32(FILE_WRITE_ATTRIBUTES
);
2128 /* File attributes ignored on open (used in create though) */
2129 req
->FileAttributes
= cpu_to_le32(file_attributes
);
2130 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
2131 req
->CreateDisposition
= cpu_to_le32(FILE_CREATE
);
2132 req
->CreateOptions
= cpu_to_le32(CREATE_NOT_FILE
);
2134 iov
[0].iov_base
= (char *)req
;
2135 /* -1 since last byte is buf[0] which is sent below (path) */
2136 iov
[0].iov_len
= total_len
- 1;
2138 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
));
2140 /* [MS-SMB2] 2.2.13 NameOffset:
2141 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2142 * the SMB2 header, the file name includes a prefix that will
2143 * be processed during DFS name normalization as specified in
2144 * section 3.3.5.9. Otherwise, the file name is relative to
2145 * the share that is identified by the TreeId in the SMB2
2148 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
2151 req
->sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
2152 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
2154 tcon
->treeName
, utf16_path
);
2158 req
->NameLength
= cpu_to_le16(name_len
* 2);
2159 uni_path_len
= copy_size
;
2160 /* free before overwriting resource */
2162 utf16_path
= copy_path
;
2164 uni_path_len
= (2 * UniStrnlen((wchar_t *)utf16_path
, PATH_MAX
)) + 2;
2165 /* MUST set path len (NameLength) to 0 opening root of share */
2166 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
2167 if (uni_path_len
% 8 != 0) {
2168 copy_size
= roundup(uni_path_len
, 8);
2169 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
2174 memcpy((char *)copy_path
, (const char *)utf16_path
,
2176 uni_path_len
= copy_size
;
2177 /* free before overwriting resource */
2179 utf16_path
= copy_path
;
2183 iov
[1].iov_len
= uni_path_len
;
2184 iov
[1].iov_base
= utf16_path
;
2185 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_NONE
;
2187 if (tcon
->posix_extensions
) {
2188 /* resource #3: posix buf */
2189 rc
= add_posix_context(iov
, &n_iov
, mode
);
2192 pc_buf
= iov
[n_iov
-1].iov_base
;
2196 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2198 rqst
.rq_nvec
= n_iov
;
2200 trace_smb3_posix_mkdir_enter(xid
, tcon
->tid
, ses
->Suid
, CREATE_NOT_FILE
,
2201 FILE_WRITE_ATTRIBUTES
);
2202 /* resource #4: response buffer */
2203 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2205 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
2206 trace_smb3_posix_mkdir_err(xid
, tcon
->tid
, ses
->Suid
,
2208 FILE_WRITE_ATTRIBUTES
, rc
);
2209 goto err_free_rsp_buf
;
2212 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
2213 trace_smb3_posix_mkdir_done(xid
, rsp
->PersistentFileId
, tcon
->tid
,
2214 ses
->Suid
, CREATE_NOT_FILE
,
2215 FILE_WRITE_ATTRIBUTES
);
2217 SMB2_close(xid
, tcon
, rsp
->PersistentFileId
, rsp
->VolatileFileId
);
2219 /* Eventually save off posix specific response info and timestaps */
2222 free_rsp_buf(resp_buftype
, rsp
);
2225 cifs_small_buf_release(req
);
2232 SMB2_open_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
, __u8
*oplock
,
2233 struct cifs_open_parms
*oparms
, __le16
*path
)
2235 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2236 struct smb2_create_req
*req
;
2237 unsigned int n_iov
= 2;
2238 __u32 file_attributes
= 0;
2241 unsigned int total_len
;
2242 struct kvec
*iov
= rqst
->rq_iov
;
2246 rc
= smb2_plain_req_init(SMB2_CREATE
, tcon
, (void **) &req
, &total_len
);
2250 iov
[0].iov_base
= (char *)req
;
2251 /* -1 since last byte is buf[0] which is sent below (path) */
2252 iov
[0].iov_len
= total_len
- 1;
2254 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
2255 file_attributes
|= ATTR_READONLY
;
2256 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
2257 file_attributes
|= ATTR_SYSTEM
;
2259 req
->ImpersonationLevel
= IL_IMPERSONATION
;
2260 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
2261 /* File attributes ignored on open (used in create though) */
2262 req
->FileAttributes
= cpu_to_le32(file_attributes
);
2263 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
2264 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
2265 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
2266 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
));
2268 /* [MS-SMB2] 2.2.13 NameOffset:
2269 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2270 * the SMB2 header, the file name includes a prefix that will
2271 * be processed during DFS name normalization as specified in
2272 * section 3.3.5.9. Otherwise, the file name is relative to
2273 * the share that is identified by the TreeId in the SMB2
2276 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
2279 req
->sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
2280 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
2282 tcon
->treeName
, path
);
2285 req
->NameLength
= cpu_to_le16(name_len
* 2);
2286 uni_path_len
= copy_size
;
2289 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
2290 /* MUST set path len (NameLength) to 0 opening root of share */
2291 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
2292 copy_size
= uni_path_len
;
2293 if (copy_size
% 8 != 0)
2294 copy_size
= roundup(copy_size
, 8);
2295 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
2298 memcpy((char *)copy_path
, (const char *)path
,
2300 uni_path_len
= copy_size
;
2304 iov
[1].iov_len
= uni_path_len
;
2305 iov
[1].iov_base
= path
;
2307 if (!server
->oplocks
)
2308 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2310 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
2311 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
2312 req
->RequestedOplockLevel
= *oplock
;
2313 else if (!(server
->capabilities
& SMB2_GLOBAL_CAP_DIRECTORY_LEASING
) &&
2314 (oparms
->create_options
& CREATE_NOT_FILE
))
2315 req
->RequestedOplockLevel
= *oplock
; /* no srv lease support */
2317 rc
= add_lease_context(server
, iov
, &n_iov
,
2318 oparms
->fid
->lease_key
, oplock
);
2323 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
2324 /* need to set Next field of lease context if we request it */
2325 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
2326 struct create_context
*ccontext
=
2327 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2329 cpu_to_le32(server
->vals
->create_lease_size
);
2332 rc
= add_durable_context(iov
, &n_iov
, oparms
,
2333 tcon
->use_persistent
);
2338 if (tcon
->posix_extensions
) {
2340 struct create_context
*ccontext
=
2341 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2343 cpu_to_le32(iov
[n_iov
-1].iov_len
);
2346 rc
= add_posix_context(iov
, &n_iov
, oparms
->mode
);
2351 if (tcon
->snapshot_time
) {
2352 cifs_dbg(FYI
, "adding snapshot context\n");
2354 struct create_context
*ccontext
=
2355 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2357 cpu_to_le32(iov
[n_iov
-1].iov_len
);
2360 rc
= add_twarp_context(iov
, &n_iov
, tcon
->snapshot_time
);
2366 rqst
->rq_nvec
= n_iov
;
2370 /* rq_iov[0] is the request and is released by cifs_small_buf_release().
2371 * All other vectors are freed by kfree().
2374 SMB2_open_free(struct smb_rqst
*rqst
)
2378 if (rqst
&& rqst
->rq_iov
) {
2379 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
);
2380 for (i
= 1; i
< rqst
->rq_nvec
; i
++)
2381 if (rqst
->rq_iov
[i
].iov_base
!= smb2_padding
)
2382 kfree(rqst
->rq_iov
[i
].iov_base
);
2387 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
2388 __u8
*oplock
, struct smb2_file_all_info
*buf
,
2389 struct kvec
*err_iov
, int *buftype
)
2391 struct smb_rqst rqst
;
2392 struct smb2_create_rsp
*rsp
= NULL
;
2393 struct TCP_Server_Info
*server
;
2394 struct cifs_tcon
*tcon
= oparms
->tcon
;
2395 struct cifs_ses
*ses
= tcon
->ses
;
2396 struct kvec iov
[SMB2_CREATE_IOV_SIZE
];
2397 struct kvec rsp_iov
= {NULL
, 0};
2398 int resp_buftype
= CIFS_NO_BUFFER
;
2402 cifs_dbg(FYI
, "create/open\n");
2403 if (ses
&& (ses
->server
))
2404 server
= ses
->server
;
2408 if (smb3_encryption_required(tcon
))
2409 flags
|= CIFS_TRANSFORM_REQ
;
2411 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2412 memset(&iov
, 0, sizeof(iov
));
2414 rqst
.rq_nvec
= SMB2_CREATE_IOV_SIZE
;
2416 rc
= SMB2_open_init(tcon
, &rqst
, oplock
, oparms
, path
);
2420 trace_smb3_open_enter(xid
, tcon
->tid
, tcon
->ses
->Suid
,
2421 oparms
->create_options
, oparms
->desired_access
);
2423 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
2425 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
2428 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
2429 if (err_iov
&& rsp
) {
2431 *buftype
= resp_buftype
;
2432 resp_buftype
= CIFS_NO_BUFFER
;
2435 trace_smb3_open_err(xid
, tcon
->tid
, ses
->Suid
,
2436 oparms
->create_options
, oparms
->desired_access
, rc
);
2439 trace_smb3_open_done(xid
, rsp
->PersistentFileId
, tcon
->tid
,
2440 ses
->Suid
, oparms
->create_options
,
2441 oparms
->desired_access
);
2443 atomic_inc(&tcon
->num_remote_opens
);
2444 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
2445 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
2446 #ifdef CONFIG_CIFS_DEBUG2
2447 oparms
->fid
->mid
= le64_to_cpu(rsp
->sync_hdr
.MessageId
);
2448 #endif /* CIFS_DEBUG2 */
2451 memcpy(buf
, &rsp
->CreationTime
, 32);
2452 buf
->AllocationSize
= rsp
->AllocationSize
;
2453 buf
->EndOfFile
= rsp
->EndofFile
;
2454 buf
->Attributes
= rsp
->FileAttributes
;
2455 buf
->NumberOfLinks
= cpu_to_le32(1);
2456 buf
->DeletePending
= 0;
2459 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
2460 *oplock
= smb2_parse_lease_state(server
, rsp
,
2461 &oparms
->fid
->epoch
,
2462 oparms
->fid
->lease_key
);
2464 *oplock
= rsp
->OplockLevel
;
2466 SMB2_open_free(&rqst
);
2467 free_rsp_buf(resp_buftype
, rsp
);
2472 SMB2_ioctl_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
,
2473 u64 persistent_fid
, u64 volatile_fid
, u32 opcode
,
2474 bool is_fsctl
, char *in_data
, u32 indatalen
)
2476 struct smb2_ioctl_req
*req
;
2477 struct kvec
*iov
= rqst
->rq_iov
;
2478 unsigned int total_len
;
2481 rc
= smb2_plain_req_init(SMB2_IOCTL
, tcon
, (void **) &req
, &total_len
);
2485 req
->CtlCode
= cpu_to_le32(opcode
);
2486 req
->PersistentFileId
= persistent_fid
;
2487 req
->VolatileFileId
= volatile_fid
;
2489 iov
[0].iov_base
= (char *)req
;
2491 * If no input data, the size of ioctl struct in
2492 * protocol spec still includes a 1 byte data buffer,
2493 * but if input data passed to ioctl, we do not
2494 * want to double count this, so we do not send
2495 * the dummy one byte of data in iovec[0] if sending
2496 * input data (in iovec[1]).
2499 req
->InputCount
= cpu_to_le32(indatalen
);
2500 /* do not set InputOffset if no input data */
2502 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
));
2504 iov
[0].iov_len
= total_len
- 1;
2505 iov
[1].iov_base
= in_data
;
2506 iov
[1].iov_len
= indatalen
;
2509 iov
[0].iov_len
= total_len
;
2512 req
->OutputOffset
= 0;
2513 req
->OutputCount
= 0; /* MBZ */
2516 * Could increase MaxOutputResponse, but that would require more
2517 * than one credit. Windows typically sets this smaller, but for some
2518 * ioctls it may be useful to allow server to send more. No point
2519 * limiting what the server can send as long as fits in one credit
2520 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
2521 * (by default, note that it can be overridden to make max larger)
2522 * in responses (except for read responses which can be bigger.
2523 * We may want to bump this limit up
2525 req
->MaxOutputResponse
= cpu_to_le32(CIFSMaxBufSize
);
2528 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
2532 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2533 if (opcode
== FSCTL_VALIDATE_NEGOTIATE_INFO
)
2534 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
2540 SMB2_ioctl_free(struct smb_rqst
*rqst
)
2542 if (rqst
&& rqst
->rq_iov
)
2543 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
2547 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2550 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2551 u64 volatile_fid
, u32 opcode
, bool is_fsctl
,
2552 char *in_data
, u32 indatalen
,
2553 char **out_data
, u32
*plen
/* returned data len */)
2555 struct smb_rqst rqst
;
2556 struct smb2_ioctl_rsp
*rsp
= NULL
;
2557 struct cifs_ses
*ses
;
2558 struct kvec iov
[SMB2_IOCTL_IOV_SIZE
];
2559 struct kvec rsp_iov
= {NULL
, 0};
2560 int resp_buftype
= CIFS_NO_BUFFER
;
2564 cifs_dbg(FYI
, "SMB2 IOCTL\n");
2566 if (out_data
!= NULL
)
2569 /* zero out returned data len, in case of error */
2578 if (!ses
|| !(ses
->server
))
2581 if (smb3_encryption_required(tcon
))
2582 flags
|= CIFS_TRANSFORM_REQ
;
2584 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2585 memset(&iov
, 0, sizeof(iov
));
2587 rqst
.rq_nvec
= SMB2_IOCTL_IOV_SIZE
;
2589 rc
= SMB2_ioctl_init(tcon
, &rqst
, persistent_fid
, volatile_fid
,
2590 opcode
, is_fsctl
, in_data
, indatalen
);
2594 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
2596 rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
.iov_base
;
2599 trace_smb3_fsctl_err(xid
, persistent_fid
, tcon
->tid
,
2600 ses
->Suid
, 0, opcode
, rc
);
2602 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
2603 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
2605 } else if (rc
== -EINVAL
) {
2606 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
2607 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
2608 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
2613 /* check if caller wants to look at return data or just return rc */
2614 if ((plen
== NULL
) || (out_data
== NULL
))
2617 *plen
= le32_to_cpu(rsp
->OutputCount
);
2619 /* We check for obvious errors in the output buffer length and offset */
2621 goto ioctl_exit
; /* server returned no data */
2622 else if (*plen
> rsp_iov
.iov_len
|| *plen
> 0xFF00) {
2623 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
2629 if (rsp_iov
.iov_len
- *plen
< le32_to_cpu(rsp
->OutputOffset
)) {
2630 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
2631 le32_to_cpu(rsp
->OutputOffset
));
2637 *out_data
= kmemdup((char *)rsp
+ le32_to_cpu(rsp
->OutputOffset
),
2639 if (*out_data
== NULL
) {
2645 SMB2_ioctl_free(&rqst
);
2646 free_rsp_buf(resp_buftype
, rsp
);
2651 * Individual callers to ioctl worker function follow
2655 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
2656 u64 persistent_fid
, u64 volatile_fid
)
2659 struct compress_ioctl fsctl_input
;
2660 char *ret_data
= NULL
;
2662 fsctl_input
.CompressionState
=
2663 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
2665 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
2666 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
2667 (char *)&fsctl_input
/* data input */,
2668 2 /* in data len */, &ret_data
/* out data */, NULL
);
2670 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
2676 SMB2_close_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
,
2677 u64 persistent_fid
, u64 volatile_fid
)
2679 struct smb2_close_req
*req
;
2680 struct kvec
*iov
= rqst
->rq_iov
;
2681 unsigned int total_len
;
2684 rc
= smb2_plain_req_init(SMB2_CLOSE
, tcon
, (void **) &req
, &total_len
);
2688 req
->PersistentFileId
= persistent_fid
;
2689 req
->VolatileFileId
= volatile_fid
;
2690 iov
[0].iov_base
= (char *)req
;
2691 iov
[0].iov_len
= total_len
;
2697 SMB2_close_free(struct smb_rqst
*rqst
)
2699 if (rqst
&& rqst
->rq_iov
)
2700 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
2704 SMB2_close_flags(const unsigned int xid
, struct cifs_tcon
*tcon
,
2705 u64 persistent_fid
, u64 volatile_fid
, int flags
)
2707 struct smb_rqst rqst
;
2708 struct smb2_close_rsp
*rsp
= NULL
;
2709 struct cifs_ses
*ses
= tcon
->ses
;
2711 struct kvec rsp_iov
;
2712 int resp_buftype
= CIFS_NO_BUFFER
;
2715 cifs_dbg(FYI
, "Close\n");
2717 if (!ses
|| !(ses
->server
))
2720 if (smb3_encryption_required(tcon
))
2721 flags
|= CIFS_TRANSFORM_REQ
;
2723 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2724 memset(&iov
, 0, sizeof(iov
));
2728 rc
= SMB2_close_init(tcon
, &rqst
, persistent_fid
, volatile_fid
);
2732 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2733 rsp
= (struct smb2_close_rsp
*)rsp_iov
.iov_base
;
2736 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
2737 trace_smb3_close_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
2742 atomic_dec(&tcon
->num_remote_opens
);
2744 /* BB FIXME - decode close response, update inode for caching */
2747 SMB2_close_free(&rqst
);
2748 free_rsp_buf(resp_buftype
, rsp
);
2753 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
2754 u64 persistent_fid
, u64 volatile_fid
)
2756 return SMB2_close_flags(xid
, tcon
, persistent_fid
, volatile_fid
, 0);
2760 smb2_validate_iov(unsigned int offset
, unsigned int buffer_length
,
2761 struct kvec
*iov
, unsigned int min_buf_size
)
2763 unsigned int smb_len
= iov
->iov_len
;
2764 char *end_of_smb
= smb_len
+ (char *)iov
->iov_base
;
2765 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
2766 char *end_of_buf
= begin_of_buf
+ buffer_length
;
2769 if (buffer_length
< min_buf_size
) {
2770 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
2771 buffer_length
, min_buf_size
);
2775 /* check if beyond RFC1001 maximum length */
2776 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
2777 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
2778 buffer_length
, smb_len
);
2782 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
2783 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
2791 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2792 * Caller must free buffer.
2795 smb2_validate_and_copy_iov(unsigned int offset
, unsigned int buffer_length
,
2796 struct kvec
*iov
, unsigned int minbufsize
,
2799 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
2805 rc
= smb2_validate_iov(offset
, buffer_length
, iov
, minbufsize
);
2809 memcpy(data
, begin_of_buf
, buffer_length
);
2815 SMB2_query_info_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
,
2816 u64 persistent_fid
, u64 volatile_fid
,
2817 u8 info_class
, u8 info_type
, u32 additional_info
,
2818 size_t output_len
, size_t input_len
, void *input
)
2820 struct smb2_query_info_req
*req
;
2821 struct kvec
*iov
= rqst
->rq_iov
;
2822 unsigned int total_len
;
2825 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
,
2830 req
->InfoType
= info_type
;
2831 req
->FileInfoClass
= info_class
;
2832 req
->PersistentFileId
= persistent_fid
;
2833 req
->VolatileFileId
= volatile_fid
;
2834 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
2836 req
->OutputBufferLength
= cpu_to_le32(output_len
);
2838 req
->InputBufferLength
= cpu_to_le32(input_len
);
2839 /* total_len for smb query request never close to le16 max */
2840 req
->InputBufferOffset
= cpu_to_le16(total_len
- 1);
2841 memcpy(req
->Buffer
, input
, input_len
);
2844 iov
[0].iov_base
= (char *)req
;
2846 iov
[0].iov_len
= total_len
- 1 + input_len
;
2851 SMB2_query_info_free(struct smb_rqst
*rqst
)
2853 if (rqst
&& rqst
->rq_iov
)
2854 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
2858 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2859 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
, u8 info_type
,
2860 u32 additional_info
, size_t output_len
, size_t min_len
, void **data
,
2863 struct smb_rqst rqst
;
2864 struct smb2_query_info_rsp
*rsp
= NULL
;
2866 struct kvec rsp_iov
;
2868 int resp_buftype
= CIFS_NO_BUFFER
;
2869 struct cifs_ses
*ses
= tcon
->ses
;
2871 bool allocated
= false;
2873 cifs_dbg(FYI
, "Query Info\n");
2875 if (!ses
|| !(ses
->server
))
2878 if (smb3_encryption_required(tcon
))
2879 flags
|= CIFS_TRANSFORM_REQ
;
2881 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2882 memset(&iov
, 0, sizeof(iov
));
2886 rc
= SMB2_query_info_init(tcon
, &rqst
, persistent_fid
, volatile_fid
,
2887 info_class
, info_type
, additional_info
,
2888 output_len
, 0, NULL
);
2892 trace_smb3_query_info_enter(xid
, persistent_fid
, tcon
->tid
,
2893 ses
->Suid
, info_class
, (__u32
)info_type
);
2895 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2896 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
2899 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2900 trace_smb3_query_info_err(xid
, persistent_fid
, tcon
->tid
,
2901 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
2905 trace_smb3_query_info_done(xid
, persistent_fid
, tcon
->tid
,
2906 ses
->Suid
, info_class
, (__u32
)info_type
);
2909 *dlen
= le32_to_cpu(rsp
->OutputBufferLength
);
2911 *data
= kmalloc(*dlen
, GFP_KERNEL
);
2914 "Error %d allocating memory for acl\n",
2924 rc
= smb2_validate_and_copy_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
2925 le32_to_cpu(rsp
->OutputBufferLength
),
2926 &rsp_iov
, min_len
, *data
);
2927 if (rc
&& allocated
) {
2934 SMB2_query_info_free(&rqst
);
2935 free_rsp_buf(resp_buftype
, rsp
);
2939 int SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2940 u64 persistent_fid
, u64 volatile_fid
, struct smb2_file_all_info
*data
)
2942 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2943 FILE_ALL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2944 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
2945 sizeof(struct smb2_file_all_info
), (void **)&data
,
2950 SMB2_query_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
2951 u64 persistent_fid
, u64 volatile_fid
,
2952 void **data
, u32
*plen
)
2954 __u32 additional_info
= OWNER_SECINFO
| GROUP_SECINFO
| DACL_SECINFO
;
2957 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2958 0, SMB2_O_INFO_SECURITY
, additional_info
,
2959 SMB2_MAX_BUFFER_SIZE
, MIN_SEC_DESC_LEN
, data
, plen
);
2963 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
2964 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
2966 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2967 FILE_INTERNAL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2968 sizeof(struct smb2_file_internal_info
),
2969 sizeof(struct smb2_file_internal_info
),
2970 (void **)&uniqueid
, NULL
);
2974 * This is a no-op for now. We're not really interested in the reply, but
2975 * rather in the fact that the server sent one and that server->lstrp
2978 * FIXME: maybe we should consider checking that the reply matches request?
2981 smb2_echo_callback(struct mid_q_entry
*mid
)
2983 struct TCP_Server_Info
*server
= mid
->callback_data
;
2984 struct smb2_echo_rsp
*rsp
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
2985 struct cifs_credits credits
= { .value
= 0, .instance
= 0 };
2987 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
2988 || mid
->mid_state
== MID_RESPONSE_MALFORMED
) {
2989 credits
.value
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
2990 credits
.instance
= server
->reconnect_instance
;
2993 DeleteMidQEntry(mid
);
2994 add_credits(server
, &credits
, CIFS_ECHO_OP
);
2997 void smb2_reconnect_server(struct work_struct
*work
)
2999 struct TCP_Server_Info
*server
= container_of(work
,
3000 struct TCP_Server_Info
, reconnect
.work
);
3001 struct cifs_ses
*ses
;
3002 struct cifs_tcon
*tcon
, *tcon2
;
3003 struct list_head tmp_list
;
3004 int tcon_exist
= false;
3006 int resched
= false;
3009 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
3010 mutex_lock(&server
->reconnect_mutex
);
3012 INIT_LIST_HEAD(&tmp_list
);
3013 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
3015 spin_lock(&cifs_tcp_ses_lock
);
3016 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
3017 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
3018 if (tcon
->need_reconnect
|| tcon
->need_reopen_files
) {
3020 list_add_tail(&tcon
->rlist
, &tmp_list
);
3024 if (ses
->tcon_ipc
&& ses
->tcon_ipc
->need_reconnect
) {
3025 list_add_tail(&ses
->tcon_ipc
->rlist
, &tmp_list
);
3030 * Get the reference to server struct to be sure that the last call of
3031 * cifs_put_tcon() in the loop below won't release the server pointer.
3034 server
->srv_count
++;
3036 spin_unlock(&cifs_tcp_ses_lock
);
3038 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
3039 rc
= smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
);
3041 cifs_reopen_persistent_handles(tcon
);
3044 list_del_init(&tcon
->rlist
);
3045 cifs_put_tcon(tcon
);
3048 cifs_dbg(FYI
, "Reconnecting tcons finished\n");
3050 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 2 * HZ
);
3051 mutex_unlock(&server
->reconnect_mutex
);
3053 /* now we can safely release srv struct */
3055 cifs_put_tcp_session(server
, 1);
3059 SMB2_echo(struct TCP_Server_Info
*server
)
3061 struct smb2_echo_req
*req
;
3064 struct smb_rqst rqst
= { .rq_iov
= iov
,
3066 unsigned int total_len
;
3068 cifs_dbg(FYI
, "In echo request\n");
3070 if (server
->tcpStatus
== CifsNeedNegotiate
) {
3071 /* No need to send echo on newly established connections */
3072 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
3076 rc
= smb2_plain_req_init(SMB2_ECHO
, NULL
, (void **)&req
, &total_len
);
3080 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
3082 iov
[0].iov_len
= total_len
;
3083 iov
[0].iov_base
= (char *)req
;
3085 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, NULL
,
3086 server
, CIFS_ECHO_OP
, NULL
);
3088 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
3090 cifs_small_buf_release(req
);
3095 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3098 struct smb_rqst rqst
;
3099 struct smb2_flush_req
*req
;
3100 struct cifs_ses
*ses
= tcon
->ses
;
3102 struct kvec rsp_iov
;
3106 unsigned int total_len
;
3108 cifs_dbg(FYI
, "Flush\n");
3110 if (!ses
|| !(ses
->server
))
3113 rc
= smb2_plain_req_init(SMB2_FLUSH
, tcon
, (void **) &req
, &total_len
);
3117 if (smb3_encryption_required(tcon
))
3118 flags
|= CIFS_TRANSFORM_REQ
;
3120 req
->PersistentFileId
= persistent_fid
;
3121 req
->VolatileFileId
= volatile_fid
;
3123 iov
[0].iov_base
= (char *)req
;
3124 iov
[0].iov_len
= total_len
;
3126 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3130 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3131 cifs_small_buf_release(req
);
3134 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
3135 trace_smb3_flush_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
3139 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3144 * To form a chain of read requests, any read requests after the first should
3145 * have the end_of_chain boolean set to true.
3148 smb2_new_read_req(void **buf
, unsigned int *total_len
,
3149 struct cifs_io_parms
*io_parms
, struct cifs_readdata
*rdata
,
3150 unsigned int remaining_bytes
, int request_type
)
3153 struct smb2_read_plain_req
*req
= NULL
;
3154 struct smb2_sync_hdr
*shdr
;
3155 struct TCP_Server_Info
*server
;
3157 rc
= smb2_plain_req_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
,
3162 server
= io_parms
->tcon
->ses
->server
;
3164 return -ECONNABORTED
;
3166 shdr
= &req
->sync_hdr
;
3167 shdr
->ProcessId
= cpu_to_le32(io_parms
->pid
);
3169 req
->PersistentFileId
= io_parms
->persistent_fid
;
3170 req
->VolatileFileId
= io_parms
->volatile_fid
;
3171 req
->ReadChannelInfoOffset
= 0; /* reserved */
3172 req
->ReadChannelInfoLength
= 0; /* reserved */
3173 req
->Channel
= 0; /* reserved */
3174 req
->MinimumCount
= 0;
3175 req
->Length
= cpu_to_le32(io_parms
->length
);
3176 req
->Offset
= cpu_to_le64(io_parms
->offset
);
3178 trace_smb3_read_enter(0 /* xid */,
3179 io_parms
->persistent_fid
,
3180 io_parms
->tcon
->tid
, io_parms
->tcon
->ses
->Suid
,
3181 io_parms
->offset
, io_parms
->length
);
3182 #ifdef CONFIG_CIFS_SMB_DIRECT
3184 * If we want to do a RDMA write, fill in and append
3185 * smbd_buffer_descriptor_v1 to the end of read request
3187 if (server
->rdma
&& rdata
&& !server
->sign
&&
3188 rdata
->bytes
>= server
->smbd_conn
->rdma_readwrite_threshold
) {
3190 struct smbd_buffer_descriptor_v1
*v1
;
3191 bool need_invalidate
=
3192 io_parms
->tcon
->ses
->server
->dialect
== SMB30_PROT_ID
;
3194 rdata
->mr
= smbd_register_mr(
3195 server
->smbd_conn
, rdata
->pages
,
3196 rdata
->nr_pages
, rdata
->page_offset
,
3197 rdata
->tailsz
, true, need_invalidate
);
3201 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
3202 if (need_invalidate
)
3203 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
3204 req
->ReadChannelInfoOffset
=
3205 cpu_to_le16(offsetof(struct smb2_read_plain_req
, Buffer
));
3206 req
->ReadChannelInfoLength
=
3207 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
3208 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
3209 v1
->offset
= cpu_to_le64(rdata
->mr
->mr
->iova
);
3210 v1
->token
= cpu_to_le32(rdata
->mr
->mr
->rkey
);
3211 v1
->length
= cpu_to_le32(rdata
->mr
->mr
->length
);
3213 *total_len
+= sizeof(*v1
) - 1;
3216 if (request_type
& CHAINED_REQUEST
) {
3217 if (!(request_type
& END_OF_CHAIN
)) {
3218 /* next 8-byte aligned request */
3219 *total_len
= DIV_ROUND_UP(*total_len
, 8) * 8;
3220 shdr
->NextCommand
= cpu_to_le32(*total_len
);
3221 } else /* END_OF_CHAIN */
3222 shdr
->NextCommand
= 0;
3223 if (request_type
& RELATED_REQUEST
) {
3224 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
3226 * Related requests use info from previous read request
3229 shdr
->SessionId
= 0xFFFFFFFF;
3230 shdr
->TreeId
= 0xFFFFFFFF;
3231 req
->PersistentFileId
= 0xFFFFFFFF;
3232 req
->VolatileFileId
= 0xFFFFFFFF;
3235 if (remaining_bytes
> io_parms
->length
)
3236 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
3238 req
->RemainingBytes
= 0;
3245 smb2_readv_callback(struct mid_q_entry
*mid
)
3247 struct cifs_readdata
*rdata
= mid
->callback_data
;
3248 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
3249 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
3250 struct smb2_sync_hdr
*shdr
=
3251 (struct smb2_sync_hdr
*)rdata
->iov
[0].iov_base
;
3252 struct cifs_credits credits
= { .value
= 0, .instance
= 0 };
3253 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
3255 .rq_pages
= rdata
->pages
,
3256 .rq_offset
= rdata
->page_offset
,
3257 .rq_npages
= rdata
->nr_pages
,
3258 .rq_pagesz
= rdata
->pagesz
,
3259 .rq_tailsz
= rdata
->tailsz
};
3261 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
3262 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
3265 switch (mid
->mid_state
) {
3266 case MID_RESPONSE_RECEIVED
:
3267 credits
.value
= le16_to_cpu(shdr
->CreditRequest
);
3268 credits
.instance
= server
->reconnect_instance
;
3269 /* result already set, check signature */
3270 if (server
->sign
&& !mid
->decrypted
) {
3273 rc
= smb2_verify_signature(&rqst
, server
);
3275 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
3278 /* FIXME: should this be counted toward the initiating task? */
3279 task_io_account_read(rdata
->got_bytes
);
3280 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
3282 case MID_REQUEST_SUBMITTED
:
3283 case MID_RETRY_NEEDED
:
3284 rdata
->result
= -EAGAIN
;
3285 if (server
->sign
&& rdata
->got_bytes
)
3286 /* reset bytes number since we can not check a sign */
3287 rdata
->got_bytes
= 0;
3288 /* FIXME: should this be counted toward the initiating task? */
3289 task_io_account_read(rdata
->got_bytes
);
3290 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
3292 case MID_RESPONSE_MALFORMED
:
3293 credits
.value
= le16_to_cpu(shdr
->CreditRequest
);
3294 credits
.instance
= server
->reconnect_instance
;
3297 rdata
->result
= -EIO
;
3299 #ifdef CONFIG_CIFS_SMB_DIRECT
3301 * If this rdata has a memmory registered, the MR can be freed
3302 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3303 * because they have limited number and are used for future I/Os
3306 smbd_deregister_mr(rdata
->mr
);
3310 if (rdata
->result
&& rdata
->result
!= -ENODATA
) {
3311 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
3312 trace_smb3_read_err(0 /* xid */,
3313 rdata
->cfile
->fid
.persistent_fid
,
3314 tcon
->tid
, tcon
->ses
->Suid
, rdata
->offset
,
3315 rdata
->bytes
, rdata
->result
);
3317 trace_smb3_read_done(0 /* xid */,
3318 rdata
->cfile
->fid
.persistent_fid
,
3319 tcon
->tid
, tcon
->ses
->Suid
,
3320 rdata
->offset
, rdata
->got_bytes
);
3322 queue_work(cifsiod_wq
, &rdata
->work
);
3323 DeleteMidQEntry(mid
);
3324 add_credits(server
, &credits
, 0);
3327 /* smb2_async_readv - send an async read, and set up mid to handle result */
3329 smb2_async_readv(struct cifs_readdata
*rdata
)
3333 struct smb2_sync_hdr
*shdr
;
3334 struct cifs_io_parms io_parms
;
3335 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
3337 struct TCP_Server_Info
*server
;
3338 unsigned int total_len
;
3340 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
3341 __func__
, rdata
->offset
, rdata
->bytes
);
3343 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
3344 io_parms
.offset
= rdata
->offset
;
3345 io_parms
.length
= rdata
->bytes
;
3346 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
3347 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
3348 io_parms
.pid
= rdata
->pid
;
3350 server
= io_parms
.tcon
->ses
->server
;
3352 rc
= smb2_new_read_req(
3353 (void **) &buf
, &total_len
, &io_parms
, rdata
, 0, 0);
3357 if (smb3_encryption_required(io_parms
.tcon
))
3358 flags
|= CIFS_TRANSFORM_REQ
;
3360 rdata
->iov
[0].iov_base
= buf
;
3361 rdata
->iov
[0].iov_len
= total_len
;
3363 shdr
= (struct smb2_sync_hdr
*)buf
;
3365 if (rdata
->credits
.value
> 0) {
3366 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
3367 SMB2_MAX_BUFFER_SIZE
));
3368 shdr
->CreditRequest
=
3369 cpu_to_le16(le16_to_cpu(shdr
->CreditCharge
) + 1);
3371 rc
= adjust_credits(server
, &rdata
->credits
, rdata
->bytes
);
3373 goto async_readv_out
;
3375 flags
|= CIFS_HAS_CREDITS
;
3378 kref_get(&rdata
->refcount
);
3379 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
3380 cifs_readv_receive
, smb2_readv_callback
,
3381 smb3_handle_read_data
, rdata
, flags
,
3384 kref_put(&rdata
->refcount
, cifs_readdata_release
);
3385 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
3386 trace_smb3_read_err(0 /* xid */, io_parms
.persistent_fid
,
3388 io_parms
.tcon
->ses
->Suid
,
3389 io_parms
.offset
, io_parms
.length
, rc
);
3393 cifs_small_buf_release(buf
);
3398 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
3399 unsigned int *nbytes
, char **buf
, int *buf_type
)
3401 struct smb_rqst rqst
;
3402 int resp_buftype
, rc
= -EACCES
;
3403 struct smb2_read_plain_req
*req
= NULL
;
3404 struct smb2_read_rsp
*rsp
= NULL
;
3406 struct kvec rsp_iov
;
3407 unsigned int total_len
;
3408 int flags
= CIFS_LOG_ERROR
;
3409 struct cifs_ses
*ses
= io_parms
->tcon
->ses
;
3412 rc
= smb2_new_read_req((void **)&req
, &total_len
, io_parms
, NULL
, 0, 0);
3416 if (smb3_encryption_required(io_parms
->tcon
))
3417 flags
|= CIFS_TRANSFORM_REQ
;
3419 iov
[0].iov_base
= (char *)req
;
3420 iov
[0].iov_len
= total_len
;
3422 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3426 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3427 cifs_small_buf_release(req
);
3429 rsp
= (struct smb2_read_rsp
*)rsp_iov
.iov_base
;
3432 if (rc
!= -ENODATA
) {
3433 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
3434 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
3435 trace_smb3_read_err(xid
, req
->PersistentFileId
,
3436 io_parms
->tcon
->tid
, ses
->Suid
,
3437 io_parms
->offset
, io_parms
->length
,
3440 trace_smb3_read_done(xid
, req
->PersistentFileId
,
3441 io_parms
->tcon
->tid
, ses
->Suid
,
3442 io_parms
->offset
, 0);
3443 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3444 return rc
== -ENODATA
? 0 : rc
;
3446 trace_smb3_read_done(xid
, req
->PersistentFileId
,
3447 io_parms
->tcon
->tid
, ses
->Suid
,
3448 io_parms
->offset
, io_parms
->length
);
3450 *nbytes
= le32_to_cpu(rsp
->DataLength
);
3451 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
3452 (*nbytes
> io_parms
->length
)) {
3453 cifs_dbg(FYI
, "bad length %d for count %d\n",
3454 *nbytes
, io_parms
->length
);
3460 memcpy(*buf
, (char *)rsp
+ rsp
->DataOffset
, *nbytes
);
3461 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3462 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
3463 *buf
= rsp_iov
.iov_base
;
3464 if (resp_buftype
== CIFS_SMALL_BUFFER
)
3465 *buf_type
= CIFS_SMALL_BUFFER
;
3466 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
3467 *buf_type
= CIFS_LARGE_BUFFER
;
3473 * Check the mid_state and signature on received buffer (if any), and queue the
3474 * workqueue completion task.
3477 smb2_writev_callback(struct mid_q_entry
*mid
)
3479 struct cifs_writedata
*wdata
= mid
->callback_data
;
3480 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
3481 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
3482 unsigned int written
;
3483 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
3484 struct cifs_credits credits
= { .value
= 0, .instance
= 0 };
3486 switch (mid
->mid_state
) {
3487 case MID_RESPONSE_RECEIVED
:
3488 credits
.value
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
3489 credits
.instance
= server
->reconnect_instance
;
3490 wdata
->result
= smb2_check_receive(mid
, server
, 0);
3491 if (wdata
->result
!= 0)
3494 written
= le32_to_cpu(rsp
->DataLength
);
3496 * Mask off high 16 bits when bytes written as returned
3497 * by the server is greater than bytes requested by the
3498 * client. OS/2 servers are known to set incorrect
3501 if (written
> wdata
->bytes
)
3504 if (written
< wdata
->bytes
)
3505 wdata
->result
= -ENOSPC
;
3507 wdata
->bytes
= written
;
3509 case MID_REQUEST_SUBMITTED
:
3510 case MID_RETRY_NEEDED
:
3511 wdata
->result
= -EAGAIN
;
3513 case MID_RESPONSE_MALFORMED
:
3514 credits
.value
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
3515 credits
.instance
= server
->reconnect_instance
;
3518 wdata
->result
= -EIO
;
3521 #ifdef CONFIG_CIFS_SMB_DIRECT
3523 * If this wdata has a memory registered, the MR can be freed
3524 * The number of MRs available is limited, it's important to recover
3525 * used MR as soon as I/O is finished. Hold MR longer in the later
3526 * I/O process can possibly result in I/O deadlock due to lack of MR
3527 * to send request on I/O retry
3530 smbd_deregister_mr(wdata
->mr
);
3534 if (wdata
->result
) {
3535 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
3536 trace_smb3_write_err(0 /* no xid */,
3537 wdata
->cfile
->fid
.persistent_fid
,
3538 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
3539 wdata
->bytes
, wdata
->result
);
3541 trace_smb3_write_done(0 /* no xid */,
3542 wdata
->cfile
->fid
.persistent_fid
,
3543 tcon
->tid
, tcon
->ses
->Suid
,
3544 wdata
->offset
, wdata
->bytes
);
3546 queue_work(cifsiod_wq
, &wdata
->work
);
3547 DeleteMidQEntry(mid
);
3548 add_credits(server
, &credits
, 0);
3551 /* smb2_async_writev - send an async write, and set up mid to handle result */
3553 smb2_async_writev(struct cifs_writedata
*wdata
,
3554 void (*release
)(struct kref
*kref
))
3556 int rc
= -EACCES
, flags
= 0;
3557 struct smb2_write_req
*req
= NULL
;
3558 struct smb2_sync_hdr
*shdr
;
3559 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
3560 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
3562 struct smb_rqst rqst
= { };
3563 unsigned int total_len
;
3565 rc
= smb2_plain_req_init(SMB2_WRITE
, tcon
, (void **) &req
, &total_len
);
3569 if (smb3_encryption_required(tcon
))
3570 flags
|= CIFS_TRANSFORM_REQ
;
3572 shdr
= (struct smb2_sync_hdr
*)req
;
3573 shdr
->ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
3575 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
3576 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
3577 req
->WriteChannelInfoOffset
= 0;
3578 req
->WriteChannelInfoLength
= 0;
3580 req
->Offset
= cpu_to_le64(wdata
->offset
);
3581 req
->DataOffset
= cpu_to_le16(
3582 offsetof(struct smb2_write_req
, Buffer
));
3583 req
->RemainingBytes
= 0;
3585 trace_smb3_write_enter(0 /* xid */, wdata
->cfile
->fid
.persistent_fid
,
3586 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
, wdata
->bytes
);
3587 #ifdef CONFIG_CIFS_SMB_DIRECT
3589 * If we want to do a server RDMA read, fill in and append
3590 * smbd_buffer_descriptor_v1 to the end of write request
3592 if (server
->rdma
&& !server
->sign
&& wdata
->bytes
>=
3593 server
->smbd_conn
->rdma_readwrite_threshold
) {
3595 struct smbd_buffer_descriptor_v1
*v1
;
3596 bool need_invalidate
= server
->dialect
== SMB30_PROT_ID
;
3598 wdata
->mr
= smbd_register_mr(
3599 server
->smbd_conn
, wdata
->pages
,
3600 wdata
->nr_pages
, wdata
->page_offset
,
3601 wdata
->tailsz
, false, need_invalidate
);
3604 goto async_writev_out
;
3607 req
->DataOffset
= 0;
3608 if (wdata
->nr_pages
> 1)
3609 req
->RemainingBytes
=
3611 (wdata
->nr_pages
- 1) * wdata
->pagesz
-
3612 wdata
->page_offset
+ wdata
->tailsz
3615 req
->RemainingBytes
= cpu_to_le32(wdata
->tailsz
);
3616 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
3617 if (need_invalidate
)
3618 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
3619 req
->WriteChannelInfoOffset
=
3620 cpu_to_le16(offsetof(struct smb2_write_req
, Buffer
));
3621 req
->WriteChannelInfoLength
=
3622 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
3623 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
3624 v1
->offset
= cpu_to_le64(wdata
->mr
->mr
->iova
);
3625 v1
->token
= cpu_to_le32(wdata
->mr
->mr
->rkey
);
3626 v1
->length
= cpu_to_le32(wdata
->mr
->mr
->length
);
3629 iov
[0].iov_len
= total_len
- 1;
3630 iov
[0].iov_base
= (char *)req
;
3634 rqst
.rq_pages
= wdata
->pages
;
3635 rqst
.rq_offset
= wdata
->page_offset
;
3636 rqst
.rq_npages
= wdata
->nr_pages
;
3637 rqst
.rq_pagesz
= wdata
->pagesz
;
3638 rqst
.rq_tailsz
= wdata
->tailsz
;
3639 #ifdef CONFIG_CIFS_SMB_DIRECT
3641 iov
[0].iov_len
+= sizeof(struct smbd_buffer_descriptor_v1
);
3645 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
3646 wdata
->offset
, wdata
->bytes
);
3648 #ifdef CONFIG_CIFS_SMB_DIRECT
3649 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3651 req
->Length
= cpu_to_le32(wdata
->bytes
);
3653 req
->Length
= cpu_to_le32(wdata
->bytes
);
3656 if (wdata
->credits
.value
> 0) {
3657 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
3658 SMB2_MAX_BUFFER_SIZE
));
3659 shdr
->CreditRequest
=
3660 cpu_to_le16(le16_to_cpu(shdr
->CreditCharge
) + 1);
3662 rc
= adjust_credits(server
, &wdata
->credits
, wdata
->bytes
);
3664 goto async_writev_out
;
3666 flags
|= CIFS_HAS_CREDITS
;
3669 kref_get(&wdata
->refcount
);
3670 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, NULL
,
3671 wdata
, flags
, &wdata
->credits
);
3674 trace_smb3_write_err(0 /* no xid */, req
->PersistentFileId
,
3675 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
3677 kref_put(&wdata
->refcount
, release
);
3678 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
3682 cifs_small_buf_release(req
);
3687 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3688 * The length field from io_parms must be at least 1 and indicates a number of
3689 * elements with data to write that begins with position 1 in iov array. All
3690 * data length is specified by count.
3693 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
3694 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
3696 struct smb_rqst rqst
;
3698 struct smb2_write_req
*req
= NULL
;
3699 struct smb2_write_rsp
*rsp
= NULL
;
3701 struct kvec rsp_iov
;
3703 unsigned int total_len
;
3710 rc
= smb2_plain_req_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
,
3715 if (io_parms
->tcon
->ses
->server
== NULL
)
3716 return -ECONNABORTED
;
3718 if (smb3_encryption_required(io_parms
->tcon
))
3719 flags
|= CIFS_TRANSFORM_REQ
;
3721 req
->sync_hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
3723 req
->PersistentFileId
= io_parms
->persistent_fid
;
3724 req
->VolatileFileId
= io_parms
->volatile_fid
;
3725 req
->WriteChannelInfoOffset
= 0;
3726 req
->WriteChannelInfoLength
= 0;
3728 req
->Length
= cpu_to_le32(io_parms
->length
);
3729 req
->Offset
= cpu_to_le64(io_parms
->offset
);
3730 req
->DataOffset
= cpu_to_le16(
3731 offsetof(struct smb2_write_req
, Buffer
));
3732 req
->RemainingBytes
= 0;
3734 trace_smb3_write_enter(xid
, io_parms
->persistent_fid
,
3735 io_parms
->tcon
->tid
, io_parms
->tcon
->ses
->Suid
,
3736 io_parms
->offset
, io_parms
->length
);
3738 iov
[0].iov_base
= (char *)req
;
3740 iov
[0].iov_len
= total_len
- 1;
3742 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3744 rqst
.rq_nvec
= n_vec
+ 1;
3746 rc
= cifs_send_recv(xid
, io_parms
->tcon
->ses
, &rqst
,
3747 &resp_buftype
, flags
, &rsp_iov
);
3748 cifs_small_buf_release(req
);
3749 rsp
= (struct smb2_write_rsp
*)rsp_iov
.iov_base
;
3752 trace_smb3_write_err(xid
, req
->PersistentFileId
,
3753 io_parms
->tcon
->tid
,
3754 io_parms
->tcon
->ses
->Suid
,
3755 io_parms
->offset
, io_parms
->length
, rc
);
3756 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
3757 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
3759 *nbytes
= le32_to_cpu(rsp
->DataLength
);
3760 trace_smb3_write_done(xid
, req
->PersistentFileId
,
3761 io_parms
->tcon
->tid
,
3762 io_parms
->tcon
->ses
->Suid
,
3763 io_parms
->offset
, *nbytes
);
3766 free_rsp_buf(resp_buftype
, rsp
);
3771 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
3774 unsigned int entrycount
= 0;
3775 unsigned int next_offset
= 0;
3777 FILE_DIRECTORY_INFO
*dir_info
;
3779 if (bufstart
== NULL
)
3782 entryptr
= bufstart
;
3785 if (entryptr
+ next_offset
< entryptr
||
3786 entryptr
+ next_offset
> end_of_buf
||
3787 entryptr
+ next_offset
+ size
> end_of_buf
) {
3788 cifs_dbg(VFS
, "malformed search entry would overflow\n");
3792 entryptr
= entryptr
+ next_offset
;
3793 dir_info
= (FILE_DIRECTORY_INFO
*)entryptr
;
3795 len
= le32_to_cpu(dir_info
->FileNameLength
);
3796 if (entryptr
+ len
< entryptr
||
3797 entryptr
+ len
> end_of_buf
||
3798 entryptr
+ len
+ size
> end_of_buf
) {
3799 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
3804 *lastentry
= entryptr
;
3807 next_offset
= le32_to_cpu(dir_info
->NextEntryOffset
);
3819 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
3820 u64 persistent_fid
, u64 volatile_fid
, int index
,
3821 struct cifs_search_info
*srch_inf
)
3823 struct smb_rqst rqst
;
3824 struct smb2_query_directory_req
*req
;
3825 struct smb2_query_directory_rsp
*rsp
= NULL
;
3827 struct kvec rsp_iov
;
3830 int resp_buftype
= CIFS_NO_BUFFER
;
3831 unsigned char *bufptr
;
3832 struct TCP_Server_Info
*server
;
3833 struct cifs_ses
*ses
= tcon
->ses
;
3834 __le16 asteriks
= cpu_to_le16('*');
3836 unsigned int output_size
= CIFSMaxBufSize
;
3837 size_t info_buf_size
;
3839 unsigned int total_len
;
3841 if (ses
&& (ses
->server
))
3842 server
= ses
->server
;
3846 rc
= smb2_plain_req_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
,
3851 if (smb3_encryption_required(tcon
))
3852 flags
|= CIFS_TRANSFORM_REQ
;
3854 switch (srch_inf
->info_level
) {
3855 case SMB_FIND_FILE_DIRECTORY_INFO
:
3856 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
3857 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
3859 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
3860 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
3861 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
3864 cifs_dbg(VFS
, "info level %u isn't supported\n",
3865 srch_inf
->info_level
);
3870 req
->FileIndex
= cpu_to_le32(index
);
3871 req
->PersistentFileId
= persistent_fid
;
3872 req
->VolatileFileId
= volatile_fid
;
3875 bufptr
= req
->Buffer
;
3876 memcpy(bufptr
, &asteriks
, len
);
3878 req
->FileNameOffset
=
3879 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1);
3880 req
->FileNameLength
= cpu_to_le16(len
);
3882 * BB could be 30 bytes or so longer if we used SMB2 specific
3883 * buffer lengths, but this is safe and close enough.
3885 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
3886 output_size
= min_t(unsigned int, output_size
, 2 << 15);
3887 req
->OutputBufferLength
= cpu_to_le32(output_size
);
3889 iov
[0].iov_base
= (char *)req
;
3891 iov
[0].iov_len
= total_len
- 1;
3893 iov
[1].iov_base
= (char *)(req
->Buffer
);
3894 iov
[1].iov_len
= len
;
3896 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3900 trace_smb3_query_dir_enter(xid
, persistent_fid
, tcon
->tid
,
3901 tcon
->ses
->Suid
, index
, output_size
);
3903 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3904 cifs_small_buf_release(req
);
3905 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
.iov_base
;
3908 if (rc
== -ENODATA
&&
3909 rsp
->sync_hdr
.Status
== STATUS_NO_MORE_FILES
) {
3910 trace_smb3_query_dir_done(xid
, persistent_fid
,
3911 tcon
->tid
, tcon
->ses
->Suid
, index
, 0);
3912 srch_inf
->endOfSearch
= true;
3915 trace_smb3_query_dir_err(xid
, persistent_fid
, tcon
->tid
,
3916 tcon
->ses
->Suid
, index
, 0, rc
);
3917 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
3922 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
3923 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
3926 trace_smb3_query_dir_err(xid
, persistent_fid
, tcon
->tid
,
3927 tcon
->ses
->Suid
, index
, 0, rc
);
3931 srch_inf
->unicode
= true;
3933 if (srch_inf
->ntwrk_buf_start
) {
3934 if (srch_inf
->smallBuf
)
3935 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
3937 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
3939 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
3940 srch_inf
->srch_entries_start
= srch_inf
->last_entry
=
3941 (char *)rsp
+ le16_to_cpu(rsp
->OutputBufferOffset
);
3942 end_of_smb
= rsp_iov
.iov_len
+ (char *)rsp
;
3943 srch_inf
->entries_in_buffer
=
3944 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
3945 &srch_inf
->last_entry
, info_buf_size
);
3946 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
3947 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
3948 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
3949 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
3950 if (resp_buftype
== CIFS_LARGE_BUFFER
)
3951 srch_inf
->smallBuf
= false;
3952 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
3953 srch_inf
->smallBuf
= true;
3955 cifs_dbg(VFS
, "illegal search buffer type\n");
3957 trace_smb3_query_dir_done(xid
, persistent_fid
, tcon
->tid
,
3958 tcon
->ses
->Suid
, index
, srch_inf
->entries_in_buffer
);
3962 free_rsp_buf(resp_buftype
, rsp
);
3967 SMB2_set_info_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
,
3968 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, u8 info_class
,
3969 u8 info_type
, u32 additional_info
,
3970 void **data
, unsigned int *size
)
3972 struct smb2_set_info_req
*req
;
3973 struct kvec
*iov
= rqst
->rq_iov
;
3974 unsigned int i
, total_len
;
3977 rc
= smb2_plain_req_init(SMB2_SET_INFO
, tcon
, (void **) &req
, &total_len
);
3981 req
->sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3982 req
->InfoType
= info_type
;
3983 req
->FileInfoClass
= info_class
;
3984 req
->PersistentFileId
= persistent_fid
;
3985 req
->VolatileFileId
= volatile_fid
;
3986 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
3989 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1);
3990 req
->BufferLength
= cpu_to_le32(*size
);
3992 memcpy(req
->Buffer
, *data
, *size
);
3995 iov
[0].iov_base
= (char *)req
;
3997 iov
[0].iov_len
= total_len
- 1;
3999 for (i
= 1; i
< rqst
->rq_nvec
; i
++) {
4000 le32_add_cpu(&req
->BufferLength
, size
[i
]);
4001 iov
[i
].iov_base
= (char *)data
[i
];
4002 iov
[i
].iov_len
= size
[i
];
4009 SMB2_set_info_free(struct smb_rqst
*rqst
)
4011 if (rqst
&& rqst
->rq_iov
)
4012 cifs_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
4016 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
4017 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, u8 info_class
,
4018 u8 info_type
, u32 additional_info
, unsigned int num
,
4019 void **data
, unsigned int *size
)
4021 struct smb_rqst rqst
;
4022 struct smb2_set_info_rsp
*rsp
= NULL
;
4024 struct kvec rsp_iov
;
4027 struct cifs_ses
*ses
= tcon
->ses
;
4030 if (!ses
|| !(ses
->server
))
4036 if (smb3_encryption_required(tcon
))
4037 flags
|= CIFS_TRANSFORM_REQ
;
4039 iov
= kmalloc_array(num
, sizeof(struct kvec
), GFP_KERNEL
);
4043 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4047 rc
= SMB2_set_info_init(tcon
, &rqst
, persistent_fid
, volatile_fid
, pid
,
4048 info_class
, info_type
, additional_info
,
4056 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
4058 SMB2_set_info_free(&rqst
);
4059 rsp
= (struct smb2_set_info_rsp
*)rsp_iov
.iov_base
;
4062 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
4063 trace_smb3_set_info_err(xid
, persistent_fid
, tcon
->tid
,
4064 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
4067 free_rsp_buf(resp_buftype
, rsp
);
4073 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
4074 u64 volatile_fid
, u32 pid
, __le64
*eof
)
4076 struct smb2_file_eof_info info
;
4080 info
.EndOfFile
= *eof
;
4083 size
= sizeof(struct smb2_file_eof_info
);
4085 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
4086 pid
, FILE_END_OF_FILE_INFORMATION
, SMB2_O_INFO_FILE
,
4087 0, 1, &data
, &size
);
4091 SMB2_set_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
4092 u64 persistent_fid
, u64 volatile_fid
,
4093 struct cifs_ntsd
*pnntsd
, int pacllen
, int aclflag
)
4095 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
4096 current
->tgid
, 0, SMB2_O_INFO_SECURITY
, aclflag
,
4097 1, (void **)&pnntsd
, &pacllen
);
4101 SMB2_set_ea(const unsigned int xid
, struct cifs_tcon
*tcon
,
4102 u64 persistent_fid
, u64 volatile_fid
,
4103 struct smb2_file_full_ea_info
*buf
, int len
)
4105 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
4106 current
->tgid
, FILE_FULL_EA_INFORMATION
, SMB2_O_INFO_FILE
,
4107 0, 1, (void **)&buf
, &len
);
4111 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
4112 const u64 persistent_fid
, const u64 volatile_fid
,
4115 struct smb_rqst rqst
;
4117 struct smb2_oplock_break
*req
= NULL
;
4118 struct cifs_ses
*ses
= tcon
->ses
;
4119 int flags
= CIFS_OBREAK_OP
;
4120 unsigned int total_len
;
4122 struct kvec rsp_iov
;
4125 cifs_dbg(FYI
, "SMB2_oplock_break\n");
4126 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
,
4131 if (smb3_encryption_required(tcon
))
4132 flags
|= CIFS_TRANSFORM_REQ
;
4134 req
->VolatileFid
= volatile_fid
;
4135 req
->PersistentFid
= persistent_fid
;
4136 req
->OplockLevel
= oplock_level
;
4137 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
4139 flags
|= CIFS_NO_RESP
;
4141 iov
[0].iov_base
= (char *)req
;
4142 iov
[0].iov_len
= total_len
;
4144 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4148 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
4149 cifs_small_buf_release(req
);
4152 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
4153 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
4160 smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
4161 struct kstatfs
*kst
)
4163 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
4164 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
4165 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
4166 kst
->f_bfree
= kst
->f_bavail
=
4167 le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
4172 copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO
*response_data
,
4173 struct kstatfs
*kst
)
4175 kst
->f_bsize
= le32_to_cpu(response_data
->BlockSize
);
4176 kst
->f_blocks
= le64_to_cpu(response_data
->TotalBlocks
);
4177 kst
->f_bfree
= le64_to_cpu(response_data
->BlocksAvail
);
4178 if (response_data
->UserBlocksAvail
== cpu_to_le64(-1))
4179 kst
->f_bavail
= kst
->f_bfree
;
4181 kst
->f_bavail
= le64_to_cpu(response_data
->UserBlocksAvail
);
4182 if (response_data
->TotalFileNodes
!= cpu_to_le64(-1))
4183 kst
->f_files
= le64_to_cpu(response_data
->TotalFileNodes
);
4184 if (response_data
->FreeFileNodes
!= cpu_to_le64(-1))
4185 kst
->f_ffree
= le64_to_cpu(response_data
->FreeFileNodes
);
4191 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
4192 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
4195 struct smb2_query_info_req
*req
;
4196 unsigned int total_len
;
4198 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
4200 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
4203 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
,
4208 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
4209 req
->FileInfoClass
= level
;
4210 req
->PersistentFileId
= persistent_fid
;
4211 req
->VolatileFileId
= volatile_fid
;
4213 req
->InputBufferOffset
=
4214 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1);
4215 req
->OutputBufferLength
= cpu_to_le32(
4216 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1);
4218 iov
->iov_base
= (char *)req
;
4219 iov
->iov_len
= total_len
;
4224 SMB311_posix_qfs_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
4225 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
4227 struct smb_rqst rqst
;
4228 struct smb2_query_info_rsp
*rsp
= NULL
;
4230 struct kvec rsp_iov
;
4233 struct cifs_ses
*ses
= tcon
->ses
;
4234 FILE_SYSTEM_POSIX_INFO
*info
= NULL
;
4237 rc
= build_qfs_info_req(&iov
, tcon
, FS_POSIX_INFORMATION
,
4238 sizeof(FILE_SYSTEM_POSIX_INFO
),
4239 persistent_fid
, volatile_fid
);
4243 if (smb3_encryption_required(tcon
))
4244 flags
|= CIFS_TRANSFORM_REQ
;
4246 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4250 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4251 cifs_small_buf_release(iov
.iov_base
);
4253 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4254 goto posix_qfsinf_exit
;
4256 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4258 info
= (FILE_SYSTEM_POSIX_INFO
*)(
4259 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
4260 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
4261 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
4262 sizeof(FILE_SYSTEM_POSIX_INFO
));
4264 copy_posix_fs_info_to_kstatfs(info
, fsdata
);
4267 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4272 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
4273 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
4275 struct smb_rqst rqst
;
4276 struct smb2_query_info_rsp
*rsp
= NULL
;
4278 struct kvec rsp_iov
;
4281 struct cifs_ses
*ses
= tcon
->ses
;
4282 struct smb2_fs_full_size_info
*info
= NULL
;
4285 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
4286 sizeof(struct smb2_fs_full_size_info
),
4287 persistent_fid
, volatile_fid
);
4291 if (smb3_encryption_required(tcon
))
4292 flags
|= CIFS_TRANSFORM_REQ
;
4294 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4298 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4299 cifs_small_buf_release(iov
.iov_base
);
4301 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4304 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4306 info
= (struct smb2_fs_full_size_info
*)(
4307 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
4308 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
4309 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
4310 sizeof(struct smb2_fs_full_size_info
));
4312 smb2_copy_fs_info_to_kstatfs(info
, fsdata
);
4315 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4320 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
4321 u64 persistent_fid
, u64 volatile_fid
, int level
)
4323 struct smb_rqst rqst
;
4324 struct smb2_query_info_rsp
*rsp
= NULL
;
4326 struct kvec rsp_iov
;
4328 int resp_buftype
, max_len
, min_len
;
4329 struct cifs_ses
*ses
= tcon
->ses
;
4330 unsigned int rsp_len
, offset
;
4333 if (level
== FS_DEVICE_INFORMATION
) {
4334 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
4335 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
4336 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
4337 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
4338 min_len
= MIN_FS_ATTR_INFO_SIZE
;
4339 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
4340 max_len
= sizeof(struct smb3_fs_ss_info
);
4341 min_len
= sizeof(struct smb3_fs_ss_info
);
4342 } else if (level
== FS_VOLUME_INFORMATION
) {
4343 max_len
= sizeof(struct smb3_fs_vol_info
) + MAX_VOL_LABEL_LEN
;
4344 min_len
= sizeof(struct smb3_fs_vol_info
);
4346 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
4350 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
4351 persistent_fid
, volatile_fid
);
4355 if (smb3_encryption_required(tcon
))
4356 flags
|= CIFS_TRANSFORM_REQ
;
4358 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4362 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4363 cifs_small_buf_release(iov
.iov_base
);
4365 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4368 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4370 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
4371 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
4372 rc
= smb2_validate_iov(offset
, rsp_len
, &rsp_iov
, min_len
);
4376 if (level
== FS_ATTRIBUTE_INFORMATION
)
4377 memcpy(&tcon
->fsAttrInfo
, offset
4378 + (char *)rsp
, min_t(unsigned int,
4380 else if (level
== FS_DEVICE_INFORMATION
)
4381 memcpy(&tcon
->fsDevInfo
, offset
4382 + (char *)rsp
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
4383 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
4384 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
4385 (offset
+ (char *)rsp
);
4386 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
4387 tcon
->perf_sector_size
=
4388 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
4389 } else if (level
== FS_VOLUME_INFORMATION
) {
4390 struct smb3_fs_vol_info
*vol_info
= (struct smb3_fs_vol_info
*)
4391 (offset
+ (char *)rsp
);
4392 tcon
->vol_serial_number
= vol_info
->VolumeSerialNumber
;
4393 tcon
->vol_create_time
= vol_info
->VolumeCreationTime
;
4397 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4402 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
4403 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
4404 const __u32 num_lock
, struct smb2_lock_element
*buf
)
4406 struct smb_rqst rqst
;
4408 struct smb2_lock_req
*req
= NULL
;
4410 struct kvec rsp_iov
;
4413 int flags
= CIFS_NO_RESP
;
4414 unsigned int total_len
;
4416 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
4418 rc
= smb2_plain_req_init(SMB2_LOCK
, tcon
, (void **) &req
, &total_len
);
4422 if (smb3_encryption_required(tcon
))
4423 flags
|= CIFS_TRANSFORM_REQ
;
4425 req
->sync_hdr
.ProcessId
= cpu_to_le32(pid
);
4426 req
->LockCount
= cpu_to_le16(num_lock
);
4428 req
->PersistentFileId
= persist_fid
;
4429 req
->VolatileFileId
= volatile_fid
;
4431 count
= num_lock
* sizeof(struct smb2_lock_element
);
4433 iov
[0].iov_base
= (char *)req
;
4434 iov
[0].iov_len
= total_len
- sizeof(struct smb2_lock_element
);
4435 iov
[1].iov_base
= (char *)buf
;
4436 iov
[1].iov_len
= count
;
4438 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
4440 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4444 rc
= cifs_send_recv(xid
, tcon
->ses
, &rqst
, &resp_buf_type
, flags
,
4446 cifs_small_buf_release(req
);
4448 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
4449 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
4450 trace_smb3_lock_err(xid
, persist_fid
, tcon
->tid
,
4451 tcon
->ses
->Suid
, rc
);
4458 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
4459 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
4460 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
4463 struct smb2_lock_element lock
;
4465 lock
.Offset
= cpu_to_le64(offset
);
4466 lock
.Length
= cpu_to_le64(length
);
4467 lock
.Flags
= cpu_to_le32(lock_flags
);
4468 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
4469 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
4471 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
4475 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
4476 __u8
*lease_key
, const __le32 lease_state
)
4478 struct smb_rqst rqst
;
4480 struct smb2_lease_ack
*req
= NULL
;
4481 struct cifs_ses
*ses
= tcon
->ses
;
4482 int flags
= CIFS_OBREAK_OP
;
4483 unsigned int total_len
;
4485 struct kvec rsp_iov
;
4487 __u64
*please_key_high
;
4488 __u64
*please_key_low
;
4490 cifs_dbg(FYI
, "SMB2_lease_break\n");
4491 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
,
4496 if (smb3_encryption_required(tcon
))
4497 flags
|= CIFS_TRANSFORM_REQ
;
4499 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
4500 req
->StructureSize
= cpu_to_le16(36);
4503 memcpy(req
->LeaseKey
, lease_key
, 16);
4504 req
->LeaseState
= lease_state
;
4506 flags
|= CIFS_NO_RESP
;
4508 iov
[0].iov_base
= (char *)req
;
4509 iov
[0].iov_len
= total_len
;
4511 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4515 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
4516 cifs_small_buf_release(req
);
4518 please_key_low
= (__u64
*)lease_key
;
4519 please_key_high
= (__u64
*)(lease_key
+8);
4521 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
4522 trace_smb3_lease_err(le32_to_cpu(lease_state
), tcon
->tid
,
4523 ses
->Suid
, *please_key_low
, *please_key_high
, rc
);
4524 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);
4526 trace_smb3_lease_done(le32_to_cpu(lease_state
), tcon
->tid
,
4527 ses
->Suid
, *please_key_low
, *please_key_high
);