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 2 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
, 2));
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
;
165 char tree
[MAX_TREE_SIZE
+ 1];
166 const char *tcp_host
;
168 const char *dfs_host
;
172 snprintf(tree
, sizeof(tree
), "\\\\%s\\IPC$",
173 tcon
->ses
->server
->hostname
);
174 return SMB2_tcon(0, tcon
->ses
, tree
, tcon
, nlsc
);
178 return SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nlsc
);
180 rc
= dfs_cache_noreq_find(tcon
->dfs_path
+ 1, NULL
, &tl
);
184 extract_unc_hostname(tcon
->ses
->server
->hostname
, &tcp_host
,
187 for (it
= dfs_cache_get_tgt_iterator(&tl
); it
;
188 it
= dfs_cache_get_next_tgt(&tl
, it
)) {
189 const char *tgt
= dfs_cache_get_tgt_name(it
);
191 extract_unc_hostname(tgt
, &dfs_host
, &dfs_host_len
);
193 if (dfs_host_len
!= tcp_host_len
194 || strncasecmp(dfs_host
, tcp_host
, dfs_host_len
) != 0) {
195 cifs_dbg(FYI
, "%s: skipping %.*s, doesn't match %.*s",
197 (int)dfs_host_len
, dfs_host
,
198 (int)tcp_host_len
, tcp_host
);
202 snprintf(tree
, sizeof(tree
), "\\%s", tgt
);
204 rc
= SMB2_tcon(0, tcon
->ses
, tree
, tcon
, nlsc
);
213 rc
= dfs_cache_noreq_update_tgthint(tcon
->dfs_path
+ 1,
218 dfs_cache_free_tgts(&tl
);
222 static inline int __smb2_reconnect(const struct nls_table
*nlsc
,
223 struct cifs_tcon
*tcon
)
225 return SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nlsc
);
230 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
233 struct nls_table
*nls_codepage
;
234 struct cifs_ses
*ses
;
235 struct TCP_Server_Info
*server
;
239 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
240 * check for tcp and smb session status done differently
241 * for those three - in the calling routine.
246 if (smb2_command
== SMB2_TREE_CONNECT
)
249 if (tcon
->tidStatus
== CifsExiting
) {
251 * only tree disconnect, open, and write,
252 * (and ulogoff which does not have tcon)
253 * are allowed as we start force umount.
255 if ((smb2_command
!= SMB2_WRITE
) &&
256 (smb2_command
!= SMB2_CREATE
) &&
257 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
258 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
263 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
264 (!tcon
->ses
->server
))
268 server
= ses
->server
;
270 retries
= server
->nr_targets
;
273 * Give demultiplex thread up to 10 seconds to each target available for
274 * reconnect -- should be greater than cifs socket timeout which is 7
277 while (server
->tcpStatus
== CifsNeedReconnect
) {
279 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
280 * here since they are implicitly done when session drops.
282 switch (smb2_command
) {
284 * BB Should we keep oplock break and add flush to exceptions?
286 case SMB2_TREE_DISCONNECT
:
289 case SMB2_OPLOCK_BREAK
:
293 rc
= wait_event_interruptible_timeout(server
->response_q
,
294 (server
->tcpStatus
!= CifsNeedReconnect
),
297 cifs_dbg(FYI
, "%s: aborting reconnect due to a received"
298 " signal by the process\n", __func__
);
302 /* are we still trying to reconnect? */
303 if (server
->tcpStatus
!= CifsNeedReconnect
)
310 * on "soft" mounts we wait once. Hard mounts keep
311 * retrying until process is killed or server comes
315 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
318 retries
= server
->nr_targets
;
321 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
324 nls_codepage
= load_nls_default();
327 * need to prevent multiple threads trying to simultaneously reconnect
328 * the same SMB session
330 mutex_lock(&tcon
->ses
->session_mutex
);
333 * Recheck after acquire mutex. If another thread is negotiating
334 * and the server never sends an answer the socket will be closed
335 * and tcpStatus set to reconnect.
337 if (server
->tcpStatus
== CifsNeedReconnect
) {
339 mutex_unlock(&tcon
->ses
->session_mutex
);
343 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
344 if (!rc
&& tcon
->ses
->need_reconnect
)
345 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
347 if (rc
|| !tcon
->need_reconnect
) {
348 mutex_unlock(&tcon
->ses
->session_mutex
);
352 cifs_mark_open_files_invalid(tcon
);
353 if (tcon
->use_persistent
)
354 tcon
->need_reopen_files
= true;
356 rc
= __smb2_reconnect(nls_codepage
, tcon
);
357 mutex_unlock(&tcon
->ses
->session_mutex
);
359 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
361 /* If sess reconnected but tcon didn't, something strange ... */
362 printk_once(KERN_WARNING
"reconnect tcon failed rc = %d\n", rc
);
366 if (smb2_command
!= SMB2_INTERNAL_CMD
)
367 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
369 atomic_inc(&tconInfoReconnectCount
);
372 * Check if handle based operation so we know whether we can continue
373 * or not without returning to caller to reset file handle.
376 * BB Is flush done by server on drop of tcp session? Should we special
377 * case it and skip above?
379 switch (smb2_command
) {
385 case SMB2_QUERY_DIRECTORY
:
386 case SMB2_CHANGE_NOTIFY
:
387 case SMB2_QUERY_INFO
:
391 unload_nls(nls_codepage
);
396 fill_small_buf(__le16 smb2_command
, struct cifs_tcon
*tcon
, void *buf
,
397 unsigned int *total_len
)
399 struct smb2_sync_pdu
*spdu
= (struct smb2_sync_pdu
*)buf
;
400 /* lookup word count ie StructureSize from table */
401 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_command
)];
404 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
405 * largest operations (Create)
409 smb2_hdr_assemble(&spdu
->sync_hdr
, smb2_command
, tcon
);
410 spdu
->StructureSize2
= cpu_to_le16(parmsize
);
412 *total_len
= parmsize
+ sizeof(struct smb2_sync_hdr
);
416 * Allocate and return pointer to an SMB request hdr, and set basic
417 * SMB information in the SMB header. If the return code is zero, this
418 * function must have filled in request_buf pointer.
421 smb2_plain_req_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
422 void **request_buf
, unsigned int *total_len
)
426 rc
= smb2_reconnect(smb2_command
, tcon
);
430 /* BB eventually switch this to SMB2 specific small buf size */
431 if (smb2_command
== SMB2_SET_INFO
)
432 *request_buf
= cifs_buf_get();
434 *request_buf
= cifs_small_buf_get();
435 if (*request_buf
== NULL
) {
436 /* BB should we add a retry in here if not a writepage? */
440 fill_small_buf(smb2_command
, tcon
,
441 (struct smb2_sync_hdr
*)(*request_buf
),
445 uint16_t com_code
= le16_to_cpu(smb2_command
);
446 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
447 cifs_stats_inc(&tcon
->num_smbs_sent
);
454 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
455 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
456 #define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100)
459 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
461 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
462 pneg_ctxt
->DataLength
= cpu_to_le16(38);
463 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
464 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
465 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
466 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
470 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
472 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
473 pneg_ctxt
->DataLength
= cpu_to_le16(4); /* Cipher Count + le16 cipher */
474 pneg_ctxt
->CipherCount
= cpu_to_le16(1);
475 /* pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;*/ /* not supported yet */
476 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_CCM
;
480 build_posix_ctxt(struct smb2_posix_neg_context
*pneg_ctxt
)
482 pneg_ctxt
->ContextType
= SMB2_POSIX_EXTENSIONS_AVAILABLE
;
483 pneg_ctxt
->DataLength
= cpu_to_le16(POSIX_CTXT_DATA_LEN
);
487 assemble_neg_contexts(struct smb2_negotiate_req
*req
,
488 unsigned int *total_len
)
490 char *pneg_ctxt
= (char *)req
;
491 unsigned int ctxt_len
;
493 if (*total_len
> 200) {
494 /* In case length corrupted don't want to overrun smb buffer */
495 cifs_dbg(VFS
, "Bad frame length assembling neg contexts\n");
500 * round up total_len of fixed part of SMB3 negotiate request to 8
501 * byte boundary before adding negotiate contexts
503 *total_len
= roundup(*total_len
, 8);
505 pneg_ctxt
= (*total_len
) + (char *)req
;
506 req
->NegotiateContextOffset
= cpu_to_le32(*total_len
);
508 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
509 ctxt_len
= DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context
), 8) * 8;
510 *total_len
+= ctxt_len
;
511 pneg_ctxt
+= ctxt_len
;
513 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
514 ctxt_len
= DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context
), 8) * 8;
515 *total_len
+= ctxt_len
;
516 pneg_ctxt
+= ctxt_len
;
518 build_posix_ctxt((struct smb2_posix_neg_context
*)pneg_ctxt
);
519 *total_len
+= sizeof(struct smb2_posix_neg_context
);
521 req
->NegotiateContextCount
= cpu_to_le16(3);
524 static void decode_preauth_context(struct smb2_preauth_neg_context
*ctxt
)
526 unsigned int len
= le16_to_cpu(ctxt
->DataLength
);
528 /* If invalid preauth context warn but use what we requested, SHA-512 */
529 if (len
< MIN_PREAUTH_CTXT_DATA_LEN
) {
530 printk_once(KERN_WARNING
"server sent bad preauth context\n");
533 if (le16_to_cpu(ctxt
->HashAlgorithmCount
) != 1)
534 printk_once(KERN_WARNING
"illegal SMB3 hash algorithm count\n");
535 if (ctxt
->HashAlgorithms
!= SMB2_PREAUTH_INTEGRITY_SHA512
)
536 printk_once(KERN_WARNING
"unknown SMB3 hash algorithm\n");
539 static int decode_encrypt_ctx(struct TCP_Server_Info
*server
,
540 struct smb2_encryption_neg_context
*ctxt
)
542 unsigned int len
= le16_to_cpu(ctxt
->DataLength
);
544 cifs_dbg(FYI
, "decode SMB3.11 encryption neg context of len %d\n", len
);
545 if (len
< MIN_ENCRYPT_CTXT_DATA_LEN
) {
546 printk_once(KERN_WARNING
"server sent bad crypto ctxt len\n");
550 if (le16_to_cpu(ctxt
->CipherCount
) != 1) {
551 printk_once(KERN_WARNING
"illegal SMB3.11 cipher count\n");
554 cifs_dbg(FYI
, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt
->Ciphers
[0]));
555 if ((ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES128_CCM
) &&
556 (ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES128_GCM
)) {
557 printk_once(KERN_WARNING
"invalid SMB3.11 cipher returned\n");
560 server
->cipher_type
= ctxt
->Ciphers
[0];
561 server
->capabilities
|= SMB2_GLOBAL_CAP_ENCRYPTION
;
565 static int smb311_decode_neg_context(struct smb2_negotiate_rsp
*rsp
,
566 struct TCP_Server_Info
*server
,
567 unsigned int len_of_smb
)
569 struct smb2_neg_context
*pctx
;
570 unsigned int offset
= le32_to_cpu(rsp
->NegotiateContextOffset
);
571 unsigned int ctxt_cnt
= le16_to_cpu(rsp
->NegotiateContextCount
);
572 unsigned int len_of_ctxts
, i
;
575 cifs_dbg(FYI
, "decoding %d negotiate contexts\n", ctxt_cnt
);
576 if (len_of_smb
<= offset
) {
577 cifs_dbg(VFS
, "Invalid response: negotiate context offset\n");
581 len_of_ctxts
= len_of_smb
- offset
;
583 for (i
= 0; i
< ctxt_cnt
; i
++) {
585 /* check that offset is not beyond end of SMB */
586 if (len_of_ctxts
== 0)
589 if (len_of_ctxts
< sizeof(struct smb2_neg_context
))
592 pctx
= (struct smb2_neg_context
*)(offset
+ (char *)rsp
);
593 clen
= le16_to_cpu(pctx
->DataLength
);
594 if (clen
> len_of_ctxts
)
597 if (pctx
->ContextType
== SMB2_PREAUTH_INTEGRITY_CAPABILITIES
)
598 decode_preauth_context(
599 (struct smb2_preauth_neg_context
*)pctx
);
600 else if (pctx
->ContextType
== SMB2_ENCRYPTION_CAPABILITIES
)
601 rc
= decode_encrypt_ctx(server
,
602 (struct smb2_encryption_neg_context
*)pctx
);
603 else if (pctx
->ContextType
== SMB2_POSIX_EXTENSIONS_AVAILABLE
)
604 server
->posix_ext_supported
= true;
606 cifs_dbg(VFS
, "unknown negcontext of type %d ignored\n",
607 le16_to_cpu(pctx
->ContextType
));
611 /* offsets must be 8 byte aligned */
612 clen
= (clen
+ 7) & ~0x7;
613 offset
+= clen
+ sizeof(struct smb2_neg_context
);
614 len_of_ctxts
-= clen
;
619 static struct create_posix
*
620 create_posix_buf(umode_t mode
)
622 struct create_posix
*buf
;
624 buf
= kzalloc(sizeof(struct create_posix
),
629 buf
->ccontext
.DataOffset
=
630 cpu_to_le16(offsetof(struct create_posix
, Mode
));
631 buf
->ccontext
.DataLength
= cpu_to_le32(4);
632 buf
->ccontext
.NameOffset
=
633 cpu_to_le16(offsetof(struct create_posix
, Name
));
634 buf
->ccontext
.NameLength
= cpu_to_le16(16);
636 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
647 buf
->Name
[10] = 0x83;
648 buf
->Name
[11] = 0xDE;
649 buf
->Name
[12] = 0x96;
650 buf
->Name
[13] = 0x8B;
651 buf
->Name
[14] = 0xCD;
652 buf
->Name
[15] = 0x7C;
653 buf
->Mode
= cpu_to_le32(mode
);
654 cifs_dbg(FYI
, "mode on posix create 0%o", mode
);
659 add_posix_context(struct kvec
*iov
, unsigned int *num_iovec
, umode_t mode
)
661 struct smb2_create_req
*req
= iov
[0].iov_base
;
662 unsigned int num
= *num_iovec
;
664 iov
[num
].iov_base
= create_posix_buf(mode
);
665 if (iov
[num
].iov_base
== NULL
)
667 iov
[num
].iov_len
= sizeof(struct create_posix
);
668 if (!req
->CreateContextsOffset
)
669 req
->CreateContextsOffset
= cpu_to_le32(
670 sizeof(struct smb2_create_req
) +
671 iov
[num
- 1].iov_len
);
672 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_posix
));
673 *num_iovec
= num
+ 1;
680 * SMB2 Worker functions follow:
682 * The general structure of the worker functions is:
683 * 1) Call smb2_init (assembles SMB2 header)
684 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
685 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
686 * 4) Decode SMB2 command specific fields in the fixed length area
687 * 5) Decode variable length data area (if any for this SMB2 command type)
688 * 6) Call free smb buffer
694 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
696 struct smb_rqst rqst
;
697 struct smb2_negotiate_req
*req
;
698 struct smb2_negotiate_rsp
*rsp
;
703 struct TCP_Server_Info
*server
= ses
->server
;
704 int blob_offset
, blob_length
;
706 int flags
= CIFS_NEG_OP
;
707 unsigned int total_len
;
709 cifs_dbg(FYI
, "Negotiate protocol\n");
712 WARN(1, "%s: server is NULL!\n", __func__
);
716 rc
= smb2_plain_req_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
, &total_len
);
720 req
->sync_hdr
.SessionId
= 0;
722 memset(server
->preauth_sha_hash
, 0, SMB2_PREAUTH_HASH_SIZE
);
723 memset(ses
->preauth_sha_hash
, 0, SMB2_PREAUTH_HASH_SIZE
);
725 if (strcmp(ses
->server
->vals
->version_string
,
726 SMB3ANY_VERSION_STRING
) == 0) {
727 req
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
728 req
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
729 req
->DialectCount
= cpu_to_le16(2);
731 } else if (strcmp(ses
->server
->vals
->version_string
,
732 SMBDEFAULT_VERSION_STRING
) == 0) {
733 req
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
734 req
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
735 req
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
736 req
->Dialects
[3] = cpu_to_le16(SMB311_PROT_ID
);
737 req
->DialectCount
= cpu_to_le16(4);
740 /* otherwise send specific dialect */
741 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
742 req
->DialectCount
= cpu_to_le16(1);
746 /* only one of SMB2 signing flags may be set in SMB2 request */
748 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
749 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
750 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
752 req
->SecurityMode
= 0;
754 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
756 /* ClientGUID must be zero for SMB2.02 dialect */
757 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
758 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
760 memcpy(req
->ClientGUID
, server
->client_guid
,
761 SMB2_CLIENT_GUID_SIZE
);
762 if ((ses
->server
->vals
->protocol_id
== SMB311_PROT_ID
) ||
763 (strcmp(ses
->server
->vals
->version_string
,
764 SMBDEFAULT_VERSION_STRING
) == 0))
765 assemble_neg_contexts(req
, &total_len
);
767 iov
[0].iov_base
= (char *)req
;
768 iov
[0].iov_len
= total_len
;
770 memset(&rqst
, 0, sizeof(struct smb_rqst
));
774 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
775 cifs_small_buf_release(req
);
776 rsp
= (struct smb2_negotiate_rsp
*)rsp_iov
.iov_base
;
778 * No tcon so can't do
779 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
781 if (rc
== -EOPNOTSUPP
) {
782 cifs_dbg(VFS
, "Dialect not supported by server. Consider "
783 "specifying vers=1.0 or vers=2.0 on mount for accessing"
789 if (strcmp(ses
->server
->vals
->version_string
,
790 SMB3ANY_VERSION_STRING
) == 0) {
791 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
793 "SMB2 dialect returned but not requested\n");
795 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
797 "SMB2.1 dialect returned but not requested\n");
800 } else if (strcmp(ses
->server
->vals
->version_string
,
801 SMBDEFAULT_VERSION_STRING
) == 0) {
802 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
804 "SMB2 dialect returned but not requested\n");
806 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
807 /* ops set to 3.0 by default for default so update */
808 ses
->server
->ops
= &smb21_operations
;
809 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
810 ses
->server
->ops
= &smb311_operations
;
811 } else if (le16_to_cpu(rsp
->DialectRevision
) !=
812 ses
->server
->vals
->protocol_id
) {
813 /* if requested single dialect ensure returned dialect matched */
814 cifs_dbg(VFS
, "Illegal 0x%x dialect returned: not requested\n",
815 le16_to_cpu(rsp
->DialectRevision
));
819 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
821 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
822 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
823 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
824 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
825 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
826 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
827 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
828 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
829 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
830 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
832 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
833 le16_to_cpu(rsp
->DialectRevision
));
837 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
840 * Keep a copy of the hash after negprot. This hash will be
841 * the starting hash value for all sessions made from this
844 memcpy(server
->preauth_sha_hash
, ses
->preauth_sha_hash
,
845 SMB2_PREAUTH_HASH_SIZE
);
847 /* SMB2 only has an extended negflavor */
848 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
849 /* set it to the maximum buffer size value we can send with 1 credit */
850 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
851 SMB2_MAX_BUFFER_SIZE
);
852 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
853 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
854 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
855 if ((server
->sec_mode
& SMB2_SEC_MODE_FLAGS_ALL
) != server
->sec_mode
)
856 cifs_dbg(FYI
, "Server returned unexpected security mode 0x%x\n",
858 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
860 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
862 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
863 (struct smb2_sync_hdr
*)rsp
);
865 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
867 * ses->sectype = RawNTLMSSP;
868 * but for time being this is our only auth choice so doesn't matter.
869 * We just found a server which sets blob length to zero expecting raw.
871 if (blob_length
== 0) {
872 cifs_dbg(FYI
, "missing security blob on negprot\n");
873 server
->sec_ntlmssp
= true;
876 rc
= cifs_enable_signing(server
, ses
->sign
);
880 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
887 if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
)) {
888 if (rsp
->NegotiateContextCount
)
889 rc
= smb311_decode_neg_context(rsp
, server
,
892 cifs_dbg(VFS
, "Missing expected negotiate contexts\n");
895 free_rsp_buf(resp_buftype
, rsp
);
899 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
902 struct validate_negotiate_info_req
*pneg_inbuf
;
903 struct validate_negotiate_info_rsp
*pneg_rsp
= NULL
;
905 u32 inbuflen
; /* max of 4 dialects */
907 cifs_dbg(FYI
, "validate negotiate\n");
909 /* In SMB3.11 preauth integrity supersedes validate negotiate */
910 if (tcon
->ses
->server
->dialect
== SMB311_PROT_ID
)
914 * validation ioctl must be signed, so no point sending this if we
915 * can not sign it (ie are not known user). Even if signing is not
916 * required (enabled but not negotiated), in those cases we selectively
917 * sign just this, the first and only signed request on a connection.
918 * Having validation of negotiate info helps reduce attack vectors.
920 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
)
921 return 0; /* validation requires signing */
923 if (tcon
->ses
->user_name
== NULL
) {
924 cifs_dbg(FYI
, "Can't validate negotiate: null user mount\n");
925 return 0; /* validation requires signing */
928 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_NULL
)
929 cifs_dbg(VFS
, "Unexpected null user (anonymous) auth flag sent by server\n");
931 pneg_inbuf
= kmalloc(sizeof(*pneg_inbuf
), GFP_NOFS
);
935 pneg_inbuf
->Capabilities
=
936 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
937 memcpy(pneg_inbuf
->Guid
, tcon
->ses
->server
->client_guid
,
938 SMB2_CLIENT_GUID_SIZE
);
941 pneg_inbuf
->SecurityMode
=
942 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
943 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
944 pneg_inbuf
->SecurityMode
=
945 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
947 pneg_inbuf
->SecurityMode
= 0;
950 if (strcmp(tcon
->ses
->server
->vals
->version_string
,
951 SMB3ANY_VERSION_STRING
) == 0) {
952 pneg_inbuf
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
953 pneg_inbuf
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
954 pneg_inbuf
->DialectCount
= cpu_to_le16(2);
955 /* structure is big enough for 3 dialects, sending only 2 */
956 inbuflen
= sizeof(*pneg_inbuf
) -
957 (2 * sizeof(pneg_inbuf
->Dialects
[0]));
958 } else if (strcmp(tcon
->ses
->server
->vals
->version_string
,
959 SMBDEFAULT_VERSION_STRING
) == 0) {
960 pneg_inbuf
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
961 pneg_inbuf
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
962 pneg_inbuf
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
963 pneg_inbuf
->Dialects
[3] = cpu_to_le16(SMB311_PROT_ID
);
964 pneg_inbuf
->DialectCount
= cpu_to_le16(4);
965 /* structure is big enough for 3 dialects */
966 inbuflen
= sizeof(*pneg_inbuf
);
968 /* otherwise specific dialect was requested */
969 pneg_inbuf
->Dialects
[0] =
970 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
971 pneg_inbuf
->DialectCount
= cpu_to_le16(1);
972 /* structure is big enough for 3 dialects, sending only 1 */
973 inbuflen
= sizeof(*pneg_inbuf
) -
974 sizeof(pneg_inbuf
->Dialects
[0]) * 2;
977 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
978 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
979 (char *)pneg_inbuf
, inbuflen
, (char **)&pneg_rsp
, &rsplen
);
982 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
988 if (rsplen
!= sizeof(*pneg_rsp
)) {
989 cifs_dbg(VFS
, "invalid protocol negotiate response size: %d\n",
992 /* relax check since Mac returns max bufsize allowed on ioctl */
993 if (rsplen
> CIFSMaxBufSize
|| rsplen
< sizeof(*pneg_rsp
))
997 /* check validate negotiate info response matches what we got earlier */
998 if (pneg_rsp
->Dialect
!= cpu_to_le16(tcon
->ses
->server
->dialect
))
1001 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
1004 /* do not validate server guid because not saved at negprot time yet */
1006 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
1007 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
1010 /* validate negotiate successful */
1012 cifs_dbg(FYI
, "validate negotiate info successful\n");
1016 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
1025 smb2_select_sectype(struct TCP_Server_Info
*server
, enum securityEnum requested
)
1027 switch (requested
) {
1034 if (server
->sec_ntlmssp
&&
1035 (global_secflags
& CIFSSEC_MAY_NTLMSSP
))
1037 if ((server
->sec_kerberos
|| server
->sec_mskerberos
) &&
1038 (global_secflags
& CIFSSEC_MAY_KRB5
))
1046 struct SMB2_sess_data
{
1048 struct cifs_ses
*ses
;
1049 struct nls_table
*nls_cp
;
1050 void (*func
)(struct SMB2_sess_data
*);
1052 u64 previous_session
;
1054 /* we will send the SMB in three pieces:
1055 * a fixed length beginning part, an optional
1056 * SPNEGO blob (which can be zero length), and a
1057 * last part which will include the strings
1058 * and rest of bcc area. This allows us to avoid
1059 * a large buffer 17K allocation
1066 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
1069 struct cifs_ses
*ses
= sess_data
->ses
;
1070 struct smb2_sess_setup_req
*req
;
1071 struct TCP_Server_Info
*server
= ses
->server
;
1072 unsigned int total_len
;
1074 rc
= smb2_plain_req_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
,
1079 /* First session, not a reauthenticate */
1080 req
->sync_hdr
.SessionId
= 0;
1082 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
1083 req
->PreviousSessionId
= sess_data
->previous_session
;
1085 req
->Flags
= 0; /* MBZ */
1087 /* enough to enable echos and oplocks and one max size write */
1088 req
->sync_hdr
.CreditRequest
= cpu_to_le16(130);
1090 /* only one of SMB2 signing flags may be set in SMB2 request */
1092 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
1093 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
1094 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
1096 req
->SecurityMode
= 0;
1098 req
->Capabilities
= 0;
1099 req
->Channel
= 0; /* MBZ */
1101 sess_data
->iov
[0].iov_base
= (char *)req
;
1103 sess_data
->iov
[0].iov_len
= total_len
- 1;
1105 * This variable will be used to clear the buffer
1106 * allocated above in case of any error in the calling function.
1108 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
1114 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
1116 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
1117 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1121 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
1124 struct smb_rqst rqst
;
1125 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
1126 struct kvec rsp_iov
= { NULL
, 0 };
1128 /* Testing shows that buffer offset must be at location of Buffer[0] */
1129 req
->SecurityBufferOffset
=
1130 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) - 1 /* pad */);
1131 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
1133 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1134 rqst
.rq_iov
= sess_data
->iov
;
1137 /* BB add code to build os and lm fields */
1138 rc
= cifs_send_recv(sess_data
->xid
, sess_data
->ses
,
1140 &sess_data
->buf0_type
,
1141 CIFS_LOG_ERROR
| CIFS_NEG_OP
, &rsp_iov
);
1142 cifs_small_buf_release(sess_data
->iov
[0].iov_base
);
1143 memcpy(&sess_data
->iov
[0], &rsp_iov
, sizeof(struct kvec
));
1149 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
1152 struct cifs_ses
*ses
= sess_data
->ses
;
1154 mutex_lock(&ses
->server
->srv_mutex
);
1155 if (ses
->server
->ops
->generate_signingkey
) {
1156 rc
= ses
->server
->ops
->generate_signingkey(ses
);
1159 "SMB3 session key generation failed\n");
1160 mutex_unlock(&ses
->server
->srv_mutex
);
1164 if (!ses
->server
->session_estab
) {
1165 ses
->server
->sequence_number
= 0x2;
1166 ses
->server
->session_estab
= true;
1168 mutex_unlock(&ses
->server
->srv_mutex
);
1170 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
1171 spin_lock(&GlobalMid_Lock
);
1172 ses
->status
= CifsGood
;
1173 ses
->need_reconnect
= false;
1174 spin_unlock(&GlobalMid_Lock
);
1178 #ifdef CONFIG_CIFS_UPCALL
1180 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1183 struct cifs_ses
*ses
= sess_data
->ses
;
1184 struct cifs_spnego_msg
*msg
;
1185 struct key
*spnego_key
= NULL
;
1186 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1188 rc
= SMB2_sess_alloc_buffer(sess_data
);
1192 spnego_key
= cifs_get_spnego_key(ses
);
1193 if (IS_ERR(spnego_key
)) {
1194 rc
= PTR_ERR(spnego_key
);
1199 msg
= spnego_key
->payload
.data
[0];
1201 * check version field to make sure that cifs.upcall is
1202 * sending us a response in an expected form
1204 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
1206 "bad cifs.upcall version. Expected %d got %d",
1207 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
1209 goto out_put_spnego_key
;
1212 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
1214 if (!ses
->auth_key
.response
) {
1216 "Kerberos can't allocate (%u bytes) memory",
1219 goto out_put_spnego_key
;
1221 ses
->auth_key
.len
= msg
->sesskey_len
;
1223 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
1224 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
1226 rc
= SMB2_sess_sendreceive(sess_data
);
1228 goto out_put_spnego_key
;
1230 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1231 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1233 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1235 rc
= SMB2_sess_establish_session(sess_data
);
1237 key_invalidate(spnego_key
);
1238 key_put(spnego_key
);
1240 sess_data
->result
= rc
;
1241 sess_data
->func
= NULL
;
1242 SMB2_sess_free_buffer(sess_data
);
1246 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1248 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
1249 sess_data
->result
= -EOPNOTSUPP
;
1250 sess_data
->func
= NULL
;
1255 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
1258 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
1261 struct cifs_ses
*ses
= sess_data
->ses
;
1262 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1263 char *ntlmssp_blob
= NULL
;
1264 bool use_spnego
= false; /* else use raw ntlmssp */
1265 u16 blob_length
= 0;
1268 * If memory allocation is successful, caller of this function
1271 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
1272 if (!ses
->ntlmssp
) {
1276 ses
->ntlmssp
->sesskey_per_smbsess
= true;
1278 rc
= SMB2_sess_alloc_buffer(sess_data
);
1282 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
1284 if (ntlmssp_blob
== NULL
) {
1289 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
1291 /* BB eventually need to add this */
1292 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1296 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
1297 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1299 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1300 sess_data
->iov
[1].iov_len
= blob_length
;
1302 rc
= SMB2_sess_sendreceive(sess_data
);
1303 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1305 /* If true, rc here is expected and not an error */
1306 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
1307 rsp
->sync_hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
1313 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) !=
1314 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
1315 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
1316 le16_to_cpu(rsp
->SecurityBufferOffset
));
1320 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
1321 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
1325 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
1328 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1329 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1332 kfree(ntlmssp_blob
);
1333 SMB2_sess_free_buffer(sess_data
);
1335 sess_data
->result
= 0;
1336 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
1340 kfree(ses
->ntlmssp
);
1341 ses
->ntlmssp
= NULL
;
1342 sess_data
->result
= rc
;
1343 sess_data
->func
= NULL
;
1347 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
1350 struct cifs_ses
*ses
= sess_data
->ses
;
1351 struct smb2_sess_setup_req
*req
;
1352 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1353 unsigned char *ntlmssp_blob
= NULL
;
1354 bool use_spnego
= false; /* else use raw ntlmssp */
1355 u16 blob_length
= 0;
1357 rc
= SMB2_sess_alloc_buffer(sess_data
);
1361 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
1362 req
->sync_hdr
.SessionId
= ses
->Suid
;
1364 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
, ses
,
1367 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
1372 /* BB eventually need to add this */
1373 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1377 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1378 sess_data
->iov
[1].iov_len
= blob_length
;
1380 rc
= SMB2_sess_sendreceive(sess_data
);
1384 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1386 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1387 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1389 rc
= SMB2_sess_establish_session(sess_data
);
1391 kfree(ntlmssp_blob
);
1392 SMB2_sess_free_buffer(sess_data
);
1393 kfree(ses
->ntlmssp
);
1394 ses
->ntlmssp
= NULL
;
1395 sess_data
->result
= rc
;
1396 sess_data
->func
= NULL
;
1400 SMB2_select_sec(struct cifs_ses
*ses
, struct SMB2_sess_data
*sess_data
)
1404 type
= smb2_select_sectype(ses
->server
, ses
->sectype
);
1405 cifs_dbg(FYI
, "sess setup type %d\n", type
);
1406 if (type
== Unspecified
) {
1408 "Unable to select appropriate authentication method!");
1414 sess_data
->func
= SMB2_auth_kerberos
;
1417 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
1420 cifs_dbg(VFS
, "secType %d not supported!\n", type
);
1428 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
1429 const struct nls_table
*nls_cp
)
1432 struct TCP_Server_Info
*server
= ses
->server
;
1433 struct SMB2_sess_data
*sess_data
;
1435 cifs_dbg(FYI
, "Session Setup\n");
1438 WARN(1, "%s: server is NULL!\n", __func__
);
1442 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
1446 rc
= SMB2_select_sec(ses
, sess_data
);
1449 sess_data
->xid
= xid
;
1450 sess_data
->ses
= ses
;
1451 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1452 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1453 sess_data
->previous_session
= ses
->Suid
;
1456 * Initialize the session hash with the server one.
1458 memcpy(ses
->preauth_sha_hash
, ses
->server
->preauth_sha_hash
,
1459 SMB2_PREAUTH_HASH_SIZE
);
1461 while (sess_data
->func
)
1462 sess_data
->func(sess_data
);
1464 if ((ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
) && (ses
->sign
))
1465 cifs_dbg(VFS
, "signing requested but authenticated as guest\n");
1466 rc
= sess_data
->result
;
1473 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1475 struct smb_rqst rqst
;
1476 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1478 struct TCP_Server_Info
*server
;
1480 unsigned int total_len
;
1482 struct kvec rsp_iov
;
1485 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1487 if (ses
&& (ses
->server
))
1488 server
= ses
->server
;
1492 /* no need to send SMB logoff if uid already closed due to reconnect */
1493 if (ses
->need_reconnect
)
1494 goto smb2_session_already_dead
;
1496 rc
= smb2_plain_req_init(SMB2_LOGOFF
, NULL
, (void **) &req
, &total_len
);
1500 /* since no tcon, smb2_init can not do this, so do here */
1501 req
->sync_hdr
.SessionId
= ses
->Suid
;
1503 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
1504 flags
|= CIFS_TRANSFORM_REQ
;
1505 else if (server
->sign
)
1506 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1508 flags
|= CIFS_NO_RESP
;
1510 iov
[0].iov_base
= (char *)req
;
1511 iov
[0].iov_len
= total_len
;
1513 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1517 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
1518 cifs_small_buf_release(req
);
1520 * No tcon so can't do
1521 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1524 smb2_session_already_dead
:
1528 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1530 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1533 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1535 /* These are similar values to what Windows uses */
1536 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1538 tcon
->max_chunks
= 256;
1539 tcon
->max_bytes_chunk
= 1048576;
1540 tcon
->max_bytes_copy
= 16777216;
1544 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1545 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1547 struct smb_rqst rqst
;
1548 struct smb2_tree_connect_req
*req
;
1549 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1551 struct kvec rsp_iov
= { NULL
, 0 };
1555 __le16
*unc_path
= NULL
;
1557 unsigned int total_len
;
1559 cifs_dbg(FYI
, "TCON\n");
1561 if (!(ses
->server
) || !tree
)
1564 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1565 if (unc_path
== NULL
)
1568 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1570 if (unc_path_len
< 2) {
1575 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1577 atomic_set(&tcon
->num_remote_opens
, 0);
1578 rc
= smb2_plain_req_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
,
1585 if (smb3_encryption_required(tcon
))
1586 flags
|= CIFS_TRANSFORM_REQ
;
1588 iov
[0].iov_base
= (char *)req
;
1590 iov
[0].iov_len
= total_len
- 1;
1592 /* Testing shows that buffer offset must be at location of Buffer[0] */
1593 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1595 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1596 iov
[1].iov_base
= unc_path
;
1597 iov
[1].iov_len
= unc_path_len
;
1599 /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
1600 if ((ses
->server
->dialect
== SMB311_PROT_ID
) &&
1601 !smb3_encryption_required(tcon
))
1602 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1604 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1608 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
1609 cifs_small_buf_release(req
);
1610 rsp
= (struct smb2_tree_connect_rsp
*)rsp_iov
.iov_base
;
1611 trace_smb3_tcon(xid
, tcon
->tid
, ses
->Suid
, tree
, rc
);
1614 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1615 tcon
->need_reconnect
= true;
1617 goto tcon_error_exit
;
1620 switch (rsp
->ShareType
) {
1621 case SMB2_SHARE_TYPE_DISK
:
1622 cifs_dbg(FYI
, "connection to disk share\n");
1624 case SMB2_SHARE_TYPE_PIPE
:
1626 cifs_dbg(FYI
, "connection to pipe share\n");
1628 case SMB2_SHARE_TYPE_PRINT
:
1630 cifs_dbg(FYI
, "connection to printer\n");
1633 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1635 goto tcon_error_exit
;
1638 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1639 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1640 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1641 tcon
->tidStatus
= CifsGood
;
1642 tcon
->need_reconnect
= false;
1643 tcon
->tid
= rsp
->sync_hdr
.TreeId
;
1644 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1646 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1647 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1648 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1651 !(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
1652 cifs_dbg(VFS
, "Encryption is requested but not supported\n");
1654 init_copy_chunk_defaults(tcon
);
1655 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1656 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1659 free_rsp_buf(resp_buftype
, rsp
);
1664 if (rsp
&& rsp
->sync_hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1665 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1671 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1673 struct smb_rqst rqst
;
1674 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1676 struct cifs_ses
*ses
= tcon
->ses
;
1678 unsigned int total_len
;
1680 struct kvec rsp_iov
;
1683 cifs_dbg(FYI
, "Tree Disconnect\n");
1685 if (!ses
|| !(ses
->server
))
1688 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1691 rc
= smb2_plain_req_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
,
1696 if (smb3_encryption_required(tcon
))
1697 flags
|= CIFS_TRANSFORM_REQ
;
1699 flags
|= CIFS_NO_RESP
;
1701 iov
[0].iov_base
= (char *)req
;
1702 iov
[0].iov_len
= total_len
;
1704 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1708 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
1709 cifs_small_buf_release(req
);
1711 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1717 static struct create_durable
*
1718 create_durable_buf(void)
1720 struct create_durable
*buf
;
1722 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1726 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1727 (struct create_durable
, Data
));
1728 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1729 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1730 (struct create_durable
, Name
));
1731 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1732 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1740 static struct create_durable
*
1741 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1743 struct create_durable
*buf
;
1745 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1749 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1750 (struct create_durable
, Data
));
1751 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1752 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1753 (struct create_durable
, Name
));
1754 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1755 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1756 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1757 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1766 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1767 unsigned int *epoch
, char *lease_key
)
1770 struct create_context
*cc
;
1772 unsigned int remaining
;
1775 data_offset
= (char *)rsp
+ le32_to_cpu(rsp
->CreateContextsOffset
);
1776 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
1777 cc
= (struct create_context
*)data_offset
;
1778 while (remaining
>= sizeof(struct create_context
)) {
1779 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1780 if (le16_to_cpu(cc
->NameLength
) == 4 &&
1781 strncmp(name
, "RqLs", 4) == 0)
1782 return server
->ops
->parse_lease_buf(cc
, epoch
,
1785 next
= le32_to_cpu(cc
->Next
);
1789 cc
= (struct create_context
*)((char *)cc
+ next
);
1796 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1797 unsigned int *num_iovec
, u8
*lease_key
, __u8
*oplock
)
1799 struct smb2_create_req
*req
= iov
[0].iov_base
;
1800 unsigned int num
= *num_iovec
;
1802 iov
[num
].iov_base
= server
->ops
->create_lease_buf(lease_key
, *oplock
);
1803 if (iov
[num
].iov_base
== NULL
)
1805 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1806 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1807 if (!req
->CreateContextsOffset
)
1808 req
->CreateContextsOffset
= cpu_to_le32(
1809 sizeof(struct smb2_create_req
) +
1810 iov
[num
- 1].iov_len
);
1811 le32_add_cpu(&req
->CreateContextsLength
,
1812 server
->vals
->create_lease_size
);
1813 *num_iovec
= num
+ 1;
1817 static struct create_durable_v2
*
1818 create_durable_v2_buf(struct cifs_fid
*pfid
)
1820 struct create_durable_v2
*buf
;
1822 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1826 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1827 (struct create_durable_v2
, dcontext
));
1828 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1829 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1830 (struct create_durable_v2
, Name
));
1831 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1833 buf
->dcontext
.Timeout
= 0; /* Should this be configurable by workload */
1834 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1835 generate_random_uuid(buf
->dcontext
.CreateGuid
);
1836 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1838 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1846 static struct create_durable_handle_reconnect_v2
*
1847 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1849 struct create_durable_handle_reconnect_v2
*buf
;
1851 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1856 buf
->ccontext
.DataOffset
=
1857 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1859 buf
->ccontext
.DataLength
=
1860 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1861 buf
->ccontext
.NameOffset
=
1862 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1864 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1866 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1867 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1868 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1869 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1871 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1880 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1881 struct cifs_open_parms
*oparms
)
1883 struct smb2_create_req
*req
= iov
[0].iov_base
;
1884 unsigned int num
= *num_iovec
;
1886 iov
[num
].iov_base
= create_durable_v2_buf(oparms
->fid
);
1887 if (iov
[num
].iov_base
== NULL
)
1889 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1890 if (!req
->CreateContextsOffset
)
1891 req
->CreateContextsOffset
=
1892 cpu_to_le32(sizeof(struct smb2_create_req
) +
1894 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1895 *num_iovec
= num
+ 1;
1900 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1901 struct cifs_open_parms
*oparms
)
1903 struct smb2_create_req
*req
= iov
[0].iov_base
;
1904 unsigned int num
= *num_iovec
;
1906 /* indicate that we don't need to relock the file */
1907 oparms
->reconnect
= false;
1909 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1910 if (iov
[num
].iov_base
== NULL
)
1912 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1913 if (!req
->CreateContextsOffset
)
1914 req
->CreateContextsOffset
=
1915 cpu_to_le32(sizeof(struct smb2_create_req
) +
1917 le32_add_cpu(&req
->CreateContextsLength
,
1918 sizeof(struct create_durable_handle_reconnect_v2
));
1919 *num_iovec
= num
+ 1;
1924 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1925 struct cifs_open_parms
*oparms
, bool use_persistent
)
1927 struct smb2_create_req
*req
= iov
[0].iov_base
;
1928 unsigned int num
= *num_iovec
;
1930 if (use_persistent
) {
1931 if (oparms
->reconnect
)
1932 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1935 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1938 if (oparms
->reconnect
) {
1939 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1940 /* indicate that we don't need to relock the file */
1941 oparms
->reconnect
= false;
1943 iov
[num
].iov_base
= create_durable_buf();
1944 if (iov
[num
].iov_base
== NULL
)
1946 iov
[num
].iov_len
= sizeof(struct create_durable
);
1947 if (!req
->CreateContextsOffset
)
1948 req
->CreateContextsOffset
=
1949 cpu_to_le32(sizeof(struct smb2_create_req
) +
1951 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1952 *num_iovec
= num
+ 1;
1956 /* See MS-SMB2 2.2.13.2.7 */
1957 static struct crt_twarp_ctxt
*
1958 create_twarp_buf(__u64 timewarp
)
1960 struct crt_twarp_ctxt
*buf
;
1962 buf
= kzalloc(sizeof(struct crt_twarp_ctxt
), GFP_KERNEL
);
1966 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1967 (struct crt_twarp_ctxt
, Timestamp
));
1968 buf
->ccontext
.DataLength
= cpu_to_le32(8);
1969 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1970 (struct crt_twarp_ctxt
, Name
));
1971 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1972 /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
1977 buf
->Timestamp
= cpu_to_le64(timewarp
);
1981 /* See MS-SMB2 2.2.13.2.7 */
1983 add_twarp_context(struct kvec
*iov
, unsigned int *num_iovec
, __u64 timewarp
)
1985 struct smb2_create_req
*req
= iov
[0].iov_base
;
1986 unsigned int num
= *num_iovec
;
1988 iov
[num
].iov_base
= create_twarp_buf(timewarp
);
1989 if (iov
[num
].iov_base
== NULL
)
1991 iov
[num
].iov_len
= sizeof(struct crt_twarp_ctxt
);
1992 if (!req
->CreateContextsOffset
)
1993 req
->CreateContextsOffset
= cpu_to_le32(
1994 sizeof(struct smb2_create_req
) +
1995 iov
[num
- 1].iov_len
);
1996 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct crt_twarp_ctxt
));
1997 *num_iovec
= num
+ 1;
2002 alloc_path_with_tree_prefix(__le16
**out_path
, int *out_size
, int *out_len
,
2003 const char *treename
, const __le16
*path
)
2005 int treename_len
, path_len
;
2006 struct nls_table
*cp
;
2007 const __le16 sep
[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
2012 treename_len
= strlen(treename
);
2013 if (treename_len
< 2 || !(treename
[0] == '\\' && treename
[1] == '\\'))
2019 path_len
= UniStrnlen((wchar_t *)path
, PATH_MAX
);
2022 * make room for one path separator between the treename and
2025 *out_len
= treename_len
+ 1 + path_len
;
2028 * final path needs to be null-terminated UTF16 with a
2032 *out_size
= roundup((*out_len
+1)*2, 8);
2033 *out_path
= kzalloc(*out_size
, GFP_KERNEL
);
2037 cp
= load_nls_default();
2038 cifs_strtoUTF16(*out_path
, treename
, treename_len
, cp
);
2039 UniStrcat(*out_path
, sep
);
2040 UniStrcat(*out_path
, path
);
2046 int smb311_posix_mkdir(const unsigned int xid
, struct inode
*inode
,
2047 umode_t mode
, struct cifs_tcon
*tcon
,
2048 const char *full_path
,
2049 struct cifs_sb_info
*cifs_sb
)
2051 struct smb_rqst rqst
;
2052 struct smb2_create_req
*req
;
2053 struct smb2_create_rsp
*rsp
= NULL
;
2054 struct cifs_ses
*ses
= tcon
->ses
;
2055 struct kvec iov
[3]; /* make sure at least one for each open context */
2056 struct kvec rsp_iov
= {NULL
, 0};
2059 __le16
*copy_path
= NULL
;
2062 unsigned int n_iov
= 2;
2063 __u32 file_attributes
= 0;
2064 char *pc_buf
= NULL
;
2066 unsigned int total_len
;
2067 __le16
*utf16_path
= NULL
;
2069 cifs_dbg(FYI
, "mkdir\n");
2071 /* resource #1: path allocation */
2072 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
2076 if (!ses
|| !(ses
->server
)) {
2081 /* resource #2: request */
2082 rc
= smb2_plain_req_init(SMB2_CREATE
, tcon
, (void **) &req
, &total_len
);
2087 if (smb3_encryption_required(tcon
))
2088 flags
|= CIFS_TRANSFORM_REQ
;
2090 req
->ImpersonationLevel
= IL_IMPERSONATION
;
2091 req
->DesiredAccess
= cpu_to_le32(FILE_WRITE_ATTRIBUTES
);
2092 /* File attributes ignored on open (used in create though) */
2093 req
->FileAttributes
= cpu_to_le32(file_attributes
);
2094 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
2095 req
->CreateDisposition
= cpu_to_le32(FILE_CREATE
);
2096 req
->CreateOptions
= cpu_to_le32(CREATE_NOT_FILE
);
2098 iov
[0].iov_base
= (char *)req
;
2099 /* -1 since last byte is buf[0] which is sent below (path) */
2100 iov
[0].iov_len
= total_len
- 1;
2102 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
));
2104 /* [MS-SMB2] 2.2.13 NameOffset:
2105 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2106 * the SMB2 header, the file name includes a prefix that will
2107 * be processed during DFS name normalization as specified in
2108 * section 3.3.5.9. Otherwise, the file name is relative to
2109 * the share that is identified by the TreeId in the SMB2
2112 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
2115 req
->sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
2116 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
2118 tcon
->treeName
, utf16_path
);
2122 req
->NameLength
= cpu_to_le16(name_len
* 2);
2123 uni_path_len
= copy_size
;
2124 /* free before overwriting resource */
2126 utf16_path
= copy_path
;
2128 uni_path_len
= (2 * UniStrnlen((wchar_t *)utf16_path
, PATH_MAX
)) + 2;
2129 /* MUST set path len (NameLength) to 0 opening root of share */
2130 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
2131 if (uni_path_len
% 8 != 0) {
2132 copy_size
= roundup(uni_path_len
, 8);
2133 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
2138 memcpy((char *)copy_path
, (const char *)utf16_path
,
2140 uni_path_len
= copy_size
;
2141 /* free before overwriting resource */
2143 utf16_path
= copy_path
;
2147 iov
[1].iov_len
= uni_path_len
;
2148 iov
[1].iov_base
= utf16_path
;
2149 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_NONE
;
2151 if (tcon
->posix_extensions
) {
2152 /* resource #3: posix buf */
2153 rc
= add_posix_context(iov
, &n_iov
, mode
);
2156 pc_buf
= iov
[n_iov
-1].iov_base
;
2160 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2162 rqst
.rq_nvec
= n_iov
;
2164 /* resource #4: response buffer */
2165 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2167 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
2168 trace_smb3_posix_mkdir_err(xid
, tcon
->tid
, ses
->Suid
,
2170 FILE_WRITE_ATTRIBUTES
, rc
);
2171 goto err_free_rsp_buf
;
2174 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
2175 trace_smb3_posix_mkdir_done(xid
, rsp
->PersistentFileId
, tcon
->tid
,
2176 ses
->Suid
, CREATE_NOT_FILE
,
2177 FILE_WRITE_ATTRIBUTES
);
2179 SMB2_close(xid
, tcon
, rsp
->PersistentFileId
, rsp
->VolatileFileId
);
2181 /* Eventually save off posix specific response info and timestaps */
2184 free_rsp_buf(resp_buftype
, rsp
);
2187 cifs_small_buf_release(req
);
2194 SMB2_open_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
, __u8
*oplock
,
2195 struct cifs_open_parms
*oparms
, __le16
*path
)
2197 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2198 struct smb2_create_req
*req
;
2199 unsigned int n_iov
= 2;
2200 __u32 file_attributes
= 0;
2203 unsigned int total_len
;
2204 struct kvec
*iov
= rqst
->rq_iov
;
2208 rc
= smb2_plain_req_init(SMB2_CREATE
, tcon
, (void **) &req
, &total_len
);
2212 iov
[0].iov_base
= (char *)req
;
2213 /* -1 since last byte is buf[0] which is sent below (path) */
2214 iov
[0].iov_len
= total_len
- 1;
2216 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
2217 file_attributes
|= ATTR_READONLY
;
2218 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
2219 file_attributes
|= ATTR_SYSTEM
;
2221 req
->ImpersonationLevel
= IL_IMPERSONATION
;
2222 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
2223 /* File attributes ignored on open (used in create though) */
2224 req
->FileAttributes
= cpu_to_le32(file_attributes
);
2225 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
2226 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
2227 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
2228 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
));
2230 /* [MS-SMB2] 2.2.13 NameOffset:
2231 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2232 * the SMB2 header, the file name includes a prefix that will
2233 * be processed during DFS name normalization as specified in
2234 * section 3.3.5.9. Otherwise, the file name is relative to
2235 * the share that is identified by the TreeId in the SMB2
2238 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
2241 req
->sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
2242 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
2244 tcon
->treeName
, path
);
2247 req
->NameLength
= cpu_to_le16(name_len
* 2);
2248 uni_path_len
= copy_size
;
2251 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
2252 /* MUST set path len (NameLength) to 0 opening root of share */
2253 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
2254 copy_size
= uni_path_len
;
2255 if (copy_size
% 8 != 0)
2256 copy_size
= roundup(copy_size
, 8);
2257 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
2260 memcpy((char *)copy_path
, (const char *)path
,
2262 uni_path_len
= copy_size
;
2266 iov
[1].iov_len
= uni_path_len
;
2267 iov
[1].iov_base
= path
;
2269 if (!server
->oplocks
)
2270 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2272 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
2273 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
2274 req
->RequestedOplockLevel
= *oplock
;
2275 else if (!(server
->capabilities
& SMB2_GLOBAL_CAP_DIRECTORY_LEASING
) &&
2276 (oparms
->create_options
& CREATE_NOT_FILE
))
2277 req
->RequestedOplockLevel
= *oplock
; /* no srv lease support */
2279 rc
= add_lease_context(server
, iov
, &n_iov
,
2280 oparms
->fid
->lease_key
, oplock
);
2285 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
2286 /* need to set Next field of lease context if we request it */
2287 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
2288 struct create_context
*ccontext
=
2289 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2291 cpu_to_le32(server
->vals
->create_lease_size
);
2294 rc
= add_durable_context(iov
, &n_iov
, oparms
,
2295 tcon
->use_persistent
);
2300 if (tcon
->posix_extensions
) {
2302 struct create_context
*ccontext
=
2303 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2305 cpu_to_le32(iov
[n_iov
-1].iov_len
);
2308 rc
= add_posix_context(iov
, &n_iov
, oparms
->mode
);
2313 if (tcon
->snapshot_time
) {
2314 cifs_dbg(FYI
, "adding snapshot context\n");
2316 struct create_context
*ccontext
=
2317 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2319 cpu_to_le32(iov
[n_iov
-1].iov_len
);
2322 rc
= add_twarp_context(iov
, &n_iov
, tcon
->snapshot_time
);
2328 rqst
->rq_nvec
= n_iov
;
2332 /* rq_iov[0] is the request and is released by cifs_small_buf_release().
2333 * All other vectors are freed by kfree().
2336 SMB2_open_free(struct smb_rqst
*rqst
)
2340 if (rqst
&& rqst
->rq_iov
) {
2341 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
);
2342 for (i
= 1; i
< rqst
->rq_nvec
; i
++)
2343 if (rqst
->rq_iov
[i
].iov_base
!= smb2_padding
)
2344 kfree(rqst
->rq_iov
[i
].iov_base
);
2349 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
2350 __u8
*oplock
, struct smb2_file_all_info
*buf
,
2351 struct kvec
*err_iov
, int *buftype
)
2353 struct smb_rqst rqst
;
2354 struct smb2_create_rsp
*rsp
= NULL
;
2355 struct TCP_Server_Info
*server
;
2356 struct cifs_tcon
*tcon
= oparms
->tcon
;
2357 struct cifs_ses
*ses
= tcon
->ses
;
2358 struct kvec iov
[SMB2_CREATE_IOV_SIZE
];
2359 struct kvec rsp_iov
= {NULL
, 0};
2360 int resp_buftype
= CIFS_NO_BUFFER
;
2364 cifs_dbg(FYI
, "create/open\n");
2365 if (ses
&& (ses
->server
))
2366 server
= ses
->server
;
2370 if (smb3_encryption_required(tcon
))
2371 flags
|= CIFS_TRANSFORM_REQ
;
2373 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2374 memset(&iov
, 0, sizeof(iov
));
2376 rqst
.rq_nvec
= SMB2_CREATE_IOV_SIZE
;
2378 rc
= SMB2_open_init(tcon
, &rqst
, oplock
, oparms
, path
);
2382 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
2384 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
2387 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
2388 if (err_iov
&& rsp
) {
2390 *buftype
= resp_buftype
;
2391 resp_buftype
= CIFS_NO_BUFFER
;
2394 trace_smb3_open_err(xid
, tcon
->tid
, ses
->Suid
,
2395 oparms
->create_options
, oparms
->desired_access
, rc
);
2398 trace_smb3_open_done(xid
, rsp
->PersistentFileId
, tcon
->tid
,
2399 ses
->Suid
, oparms
->create_options
,
2400 oparms
->desired_access
);
2402 atomic_inc(&tcon
->num_remote_opens
);
2403 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
2404 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
2405 #ifdef CONFIG_CIFS_DEBUG2
2406 oparms
->fid
->mid
= le64_to_cpu(rsp
->sync_hdr
.MessageId
);
2407 #endif /* CIFS_DEBUG2 */
2410 memcpy(buf
, &rsp
->CreationTime
, 32);
2411 buf
->AllocationSize
= rsp
->AllocationSize
;
2412 buf
->EndOfFile
= rsp
->EndofFile
;
2413 buf
->Attributes
= rsp
->FileAttributes
;
2414 buf
->NumberOfLinks
= cpu_to_le32(1);
2415 buf
->DeletePending
= 0;
2418 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
2419 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
,
2420 oparms
->fid
->lease_key
);
2422 *oplock
= rsp
->OplockLevel
;
2424 SMB2_open_free(&rqst
);
2425 free_rsp_buf(resp_buftype
, rsp
);
2430 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2433 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2434 u64 volatile_fid
, u32 opcode
, bool is_fsctl
,
2435 char *in_data
, u32 indatalen
,
2436 char **out_data
, u32
*plen
/* returned data len */)
2438 struct smb_rqst rqst
;
2439 struct smb2_ioctl_req
*req
;
2440 struct smb2_ioctl_rsp
*rsp
;
2441 struct cifs_ses
*ses
;
2443 struct kvec rsp_iov
;
2448 unsigned int total_len
;
2450 cifs_dbg(FYI
, "SMB2 IOCTL\n");
2452 if (out_data
!= NULL
)
2455 /* zero out returned data len, in case of error */
2464 if (!ses
|| !(ses
->server
))
2467 rc
= smb2_plain_req_init(SMB2_IOCTL
, tcon
, (void **) &req
, &total_len
);
2471 if (smb3_encryption_required(tcon
))
2472 flags
|= CIFS_TRANSFORM_REQ
;
2474 req
->CtlCode
= cpu_to_le32(opcode
);
2475 req
->PersistentFileId
= persistent_fid
;
2476 req
->VolatileFileId
= volatile_fid
;
2479 req
->InputCount
= cpu_to_le32(indatalen
);
2480 /* do not set InputOffset if no input data */
2482 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
));
2483 iov
[1].iov_base
= in_data
;
2484 iov
[1].iov_len
= indatalen
;
2489 req
->OutputOffset
= 0;
2490 req
->OutputCount
= 0; /* MBZ */
2493 * Could increase MaxOutputResponse, but that would require more
2494 * than one credit. Windows typically sets this smaller, but for some
2495 * ioctls it may be useful to allow server to send more. No point
2496 * limiting what the server can send as long as fits in one credit
2497 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
2498 * (by default, note that it can be overridden to make max larger)
2499 * in responses (except for read responses which can be bigger.
2500 * We may want to bump this limit up
2502 req
->MaxOutputResponse
= cpu_to_le32(CIFSMaxBufSize
);
2505 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
2509 iov
[0].iov_base
= (char *)req
;
2512 * If no input data, the size of ioctl struct in
2513 * protocol spec still includes a 1 byte data buffer,
2514 * but if input data passed to ioctl, we do not
2515 * want to double count this, so we do not send
2516 * the dummy one byte of data in iovec[0] if sending
2517 * input data (in iovec[1]).
2521 iov
[0].iov_len
= total_len
- 1;
2523 iov
[0].iov_len
= total_len
;
2525 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2526 if (opcode
== FSCTL_VALIDATE_NEGOTIATE_INFO
)
2527 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
2529 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2531 rqst
.rq_nvec
= n_iov
;
2533 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
2535 cifs_small_buf_release(req
);
2536 rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
.iov_base
;
2539 trace_smb3_fsctl_err(xid
, persistent_fid
, tcon
->tid
,
2540 ses
->Suid
, 0, opcode
, rc
);
2542 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
2543 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
2545 } else if (rc
== -EINVAL
) {
2546 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
2547 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
2548 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
2553 /* check if caller wants to look at return data or just return rc */
2554 if ((plen
== NULL
) || (out_data
== NULL
))
2557 *plen
= le32_to_cpu(rsp
->OutputCount
);
2559 /* We check for obvious errors in the output buffer length and offset */
2561 goto ioctl_exit
; /* server returned no data */
2562 else if (*plen
> rsp_iov
.iov_len
|| *plen
> 0xFF00) {
2563 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
2569 if (rsp_iov
.iov_len
- *plen
< le32_to_cpu(rsp
->OutputOffset
)) {
2570 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
2571 le32_to_cpu(rsp
->OutputOffset
));
2577 *out_data
= kmemdup((char *)rsp
+ le32_to_cpu(rsp
->OutputOffset
),
2579 if (*out_data
== NULL
) {
2585 free_rsp_buf(resp_buftype
, rsp
);
2590 * Individual callers to ioctl worker function follow
2594 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
2595 u64 persistent_fid
, u64 volatile_fid
)
2598 struct compress_ioctl fsctl_input
;
2599 char *ret_data
= NULL
;
2601 fsctl_input
.CompressionState
=
2602 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
2604 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
2605 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
2606 (char *)&fsctl_input
/* data input */,
2607 2 /* in data len */, &ret_data
/* out data */, NULL
);
2609 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
2615 SMB2_close_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
,
2616 u64 persistent_fid
, u64 volatile_fid
)
2618 struct smb2_close_req
*req
;
2619 struct kvec
*iov
= rqst
->rq_iov
;
2620 unsigned int total_len
;
2623 rc
= smb2_plain_req_init(SMB2_CLOSE
, tcon
, (void **) &req
, &total_len
);
2627 req
->PersistentFileId
= persistent_fid
;
2628 req
->VolatileFileId
= volatile_fid
;
2629 iov
[0].iov_base
= (char *)req
;
2630 iov
[0].iov_len
= total_len
;
2636 SMB2_close_free(struct smb_rqst
*rqst
)
2638 if (rqst
&& rqst
->rq_iov
)
2639 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
2643 SMB2_close_flags(const unsigned int xid
, struct cifs_tcon
*tcon
,
2644 u64 persistent_fid
, u64 volatile_fid
, int flags
)
2646 struct smb_rqst rqst
;
2647 struct smb2_close_rsp
*rsp
= NULL
;
2648 struct cifs_ses
*ses
= tcon
->ses
;
2650 struct kvec rsp_iov
;
2651 int resp_buftype
= CIFS_NO_BUFFER
;
2654 cifs_dbg(FYI
, "Close\n");
2656 if (!ses
|| !(ses
->server
))
2659 if (smb3_encryption_required(tcon
))
2660 flags
|= CIFS_TRANSFORM_REQ
;
2662 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2663 memset(&iov
, 0, sizeof(iov
));
2667 rc
= SMB2_close_init(tcon
, &rqst
, persistent_fid
, volatile_fid
);
2671 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2672 rsp
= (struct smb2_close_rsp
*)rsp_iov
.iov_base
;
2675 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
2676 trace_smb3_close_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
2681 atomic_dec(&tcon
->num_remote_opens
);
2683 /* BB FIXME - decode close response, update inode for caching */
2686 SMB2_close_free(&rqst
);
2687 free_rsp_buf(resp_buftype
, rsp
);
2692 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
2693 u64 persistent_fid
, u64 volatile_fid
)
2695 return SMB2_close_flags(xid
, tcon
, persistent_fid
, volatile_fid
, 0);
2699 smb2_validate_iov(unsigned int offset
, unsigned int buffer_length
,
2700 struct kvec
*iov
, unsigned int min_buf_size
)
2702 unsigned int smb_len
= iov
->iov_len
;
2703 char *end_of_smb
= smb_len
+ (char *)iov
->iov_base
;
2704 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
2705 char *end_of_buf
= begin_of_buf
+ buffer_length
;
2708 if (buffer_length
< min_buf_size
) {
2709 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
2710 buffer_length
, min_buf_size
);
2714 /* check if beyond RFC1001 maximum length */
2715 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
2716 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
2717 buffer_length
, smb_len
);
2721 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
2722 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
2730 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2731 * Caller must free buffer.
2734 smb2_validate_and_copy_iov(unsigned int offset
, unsigned int buffer_length
,
2735 struct kvec
*iov
, unsigned int minbufsize
,
2738 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
2744 rc
= smb2_validate_iov(offset
, buffer_length
, iov
, minbufsize
);
2748 memcpy(data
, begin_of_buf
, buffer_length
);
2754 SMB2_query_info_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
,
2755 u64 persistent_fid
, u64 volatile_fid
,
2756 u8 info_class
, u8 info_type
, u32 additional_info
,
2757 size_t output_len
, size_t input_len
, void *input
)
2759 struct smb2_query_info_req
*req
;
2760 struct kvec
*iov
= rqst
->rq_iov
;
2761 unsigned int total_len
;
2764 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
,
2769 req
->InfoType
= info_type
;
2770 req
->FileInfoClass
= info_class
;
2771 req
->PersistentFileId
= persistent_fid
;
2772 req
->VolatileFileId
= volatile_fid
;
2773 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
2775 req
->OutputBufferLength
= cpu_to_le32(output_len
);
2777 req
->InputBufferLength
= cpu_to_le32(input_len
);
2778 /* total_len for smb query request never close to le16 max */
2779 req
->InputBufferOffset
= cpu_to_le16(total_len
- 1);
2780 memcpy(req
->Buffer
, input
, input_len
);
2783 iov
[0].iov_base
= (char *)req
;
2785 iov
[0].iov_len
= total_len
- 1 + input_len
;
2790 SMB2_query_info_free(struct smb_rqst
*rqst
)
2792 if (rqst
&& rqst
->rq_iov
)
2793 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
2797 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2798 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
, u8 info_type
,
2799 u32 additional_info
, size_t output_len
, size_t min_len
, void **data
,
2802 struct smb_rqst rqst
;
2803 struct smb2_query_info_rsp
*rsp
= NULL
;
2805 struct kvec rsp_iov
;
2807 int resp_buftype
= CIFS_NO_BUFFER
;
2808 struct cifs_ses
*ses
= tcon
->ses
;
2811 cifs_dbg(FYI
, "Query Info\n");
2813 if (!ses
|| !(ses
->server
))
2816 if (smb3_encryption_required(tcon
))
2817 flags
|= CIFS_TRANSFORM_REQ
;
2819 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2820 memset(&iov
, 0, sizeof(iov
));
2824 rc
= SMB2_query_info_init(tcon
, &rqst
, persistent_fid
, volatile_fid
,
2825 info_class
, info_type
, additional_info
,
2826 output_len
, 0, NULL
);
2830 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2831 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
2834 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2835 trace_smb3_query_info_err(xid
, persistent_fid
, tcon
->tid
,
2836 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
2841 *dlen
= le32_to_cpu(rsp
->OutputBufferLength
);
2843 *data
= kmalloc(*dlen
, GFP_KERNEL
);
2846 "Error %d allocating memory for acl\n",
2854 rc
= smb2_validate_and_copy_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
2855 le32_to_cpu(rsp
->OutputBufferLength
),
2856 &rsp_iov
, min_len
, *data
);
2859 SMB2_query_info_free(&rqst
);
2860 free_rsp_buf(resp_buftype
, rsp
);
2864 int SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2865 u64 persistent_fid
, u64 volatile_fid
, struct smb2_file_all_info
*data
)
2867 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2868 FILE_ALL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2869 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
2870 sizeof(struct smb2_file_all_info
), (void **)&data
,
2875 SMB2_query_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
2876 u64 persistent_fid
, u64 volatile_fid
,
2877 void **data
, u32
*plen
)
2879 __u32 additional_info
= OWNER_SECINFO
| GROUP_SECINFO
| DACL_SECINFO
;
2882 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2883 0, SMB2_O_INFO_SECURITY
, additional_info
,
2884 SMB2_MAX_BUFFER_SIZE
, MIN_SEC_DESC_LEN
, data
, plen
);
2888 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
2889 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
2891 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2892 FILE_INTERNAL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2893 sizeof(struct smb2_file_internal_info
),
2894 sizeof(struct smb2_file_internal_info
),
2895 (void **)&uniqueid
, NULL
);
2899 * This is a no-op for now. We're not really interested in the reply, but
2900 * rather in the fact that the server sent one and that server->lstrp
2903 * FIXME: maybe we should consider checking that the reply matches request?
2906 smb2_echo_callback(struct mid_q_entry
*mid
)
2908 struct TCP_Server_Info
*server
= mid
->callback_data
;
2909 struct smb2_echo_rsp
*rsp
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
2910 unsigned int credits_received
= 1;
2912 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
2913 credits_received
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
2915 DeleteMidQEntry(mid
);
2916 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
2919 void smb2_reconnect_server(struct work_struct
*work
)
2921 struct TCP_Server_Info
*server
= container_of(work
,
2922 struct TCP_Server_Info
, reconnect
.work
);
2923 struct cifs_ses
*ses
;
2924 struct cifs_tcon
*tcon
, *tcon2
;
2925 struct list_head tmp_list
;
2926 int tcon_exist
= false;
2928 int resched
= false;
2931 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2932 mutex_lock(&server
->reconnect_mutex
);
2934 INIT_LIST_HEAD(&tmp_list
);
2935 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
2937 spin_lock(&cifs_tcp_ses_lock
);
2938 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
2939 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
2940 if (tcon
->need_reconnect
|| tcon
->need_reopen_files
) {
2942 list_add_tail(&tcon
->rlist
, &tmp_list
);
2946 if (ses
->tcon_ipc
&& ses
->tcon_ipc
->need_reconnect
) {
2947 list_add_tail(&ses
->tcon_ipc
->rlist
, &tmp_list
);
2952 * Get the reference to server struct to be sure that the last call of
2953 * cifs_put_tcon() in the loop below won't release the server pointer.
2956 server
->srv_count
++;
2958 spin_unlock(&cifs_tcp_ses_lock
);
2960 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
2961 rc
= smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
);
2963 cifs_reopen_persistent_handles(tcon
);
2966 list_del_init(&tcon
->rlist
);
2967 cifs_put_tcon(tcon
);
2970 cifs_dbg(FYI
, "Reconnecting tcons finished\n");
2972 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 2 * HZ
);
2973 mutex_unlock(&server
->reconnect_mutex
);
2975 /* now we can safely release srv struct */
2977 cifs_put_tcp_session(server
, 1);
2981 SMB2_echo(struct TCP_Server_Info
*server
)
2983 struct smb2_echo_req
*req
;
2986 struct smb_rqst rqst
= { .rq_iov
= iov
,
2988 unsigned int total_len
;
2990 cifs_dbg(FYI
, "In echo request\n");
2992 if (server
->tcpStatus
== CifsNeedNegotiate
) {
2993 /* No need to send echo on newly established connections */
2994 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
2998 rc
= smb2_plain_req_init(SMB2_ECHO
, NULL
, (void **)&req
, &total_len
);
3002 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
3004 iov
[0].iov_len
= total_len
;
3005 iov
[0].iov_base
= (char *)req
;
3007 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, NULL
,
3008 server
, CIFS_ECHO_OP
);
3010 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
3012 cifs_small_buf_release(req
);
3017 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3020 struct smb_rqst rqst
;
3021 struct smb2_flush_req
*req
;
3022 struct cifs_ses
*ses
= tcon
->ses
;
3024 struct kvec rsp_iov
;
3028 unsigned int total_len
;
3030 cifs_dbg(FYI
, "Flush\n");
3032 if (!ses
|| !(ses
->server
))
3035 rc
= smb2_plain_req_init(SMB2_FLUSH
, tcon
, (void **) &req
, &total_len
);
3039 if (smb3_encryption_required(tcon
))
3040 flags
|= CIFS_TRANSFORM_REQ
;
3042 req
->PersistentFileId
= persistent_fid
;
3043 req
->VolatileFileId
= volatile_fid
;
3045 iov
[0].iov_base
= (char *)req
;
3046 iov
[0].iov_len
= total_len
;
3048 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3052 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3053 cifs_small_buf_release(req
);
3056 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
3057 trace_smb3_flush_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
3061 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3066 * To form a chain of read requests, any read requests after the first should
3067 * have the end_of_chain boolean set to true.
3070 smb2_new_read_req(void **buf
, unsigned int *total_len
,
3071 struct cifs_io_parms
*io_parms
, struct cifs_readdata
*rdata
,
3072 unsigned int remaining_bytes
, int request_type
)
3075 struct smb2_read_plain_req
*req
= NULL
;
3076 struct smb2_sync_hdr
*shdr
;
3077 struct TCP_Server_Info
*server
;
3079 rc
= smb2_plain_req_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
,
3084 server
= io_parms
->tcon
->ses
->server
;
3086 return -ECONNABORTED
;
3088 shdr
= &req
->sync_hdr
;
3089 shdr
->ProcessId
= cpu_to_le32(io_parms
->pid
);
3091 req
->PersistentFileId
= io_parms
->persistent_fid
;
3092 req
->VolatileFileId
= io_parms
->volatile_fid
;
3093 req
->ReadChannelInfoOffset
= 0; /* reserved */
3094 req
->ReadChannelInfoLength
= 0; /* reserved */
3095 req
->Channel
= 0; /* reserved */
3096 req
->MinimumCount
= 0;
3097 req
->Length
= cpu_to_le32(io_parms
->length
);
3098 req
->Offset
= cpu_to_le64(io_parms
->offset
);
3099 #ifdef CONFIG_CIFS_SMB_DIRECT
3101 * If we want to do a RDMA write, fill in and append
3102 * smbd_buffer_descriptor_v1 to the end of read request
3104 if (server
->rdma
&& rdata
&& !server
->sign
&&
3105 rdata
->bytes
>= server
->smbd_conn
->rdma_readwrite_threshold
) {
3107 struct smbd_buffer_descriptor_v1
*v1
;
3108 bool need_invalidate
=
3109 io_parms
->tcon
->ses
->server
->dialect
== SMB30_PROT_ID
;
3111 rdata
->mr
= smbd_register_mr(
3112 server
->smbd_conn
, rdata
->pages
,
3113 rdata
->nr_pages
, rdata
->page_offset
,
3114 rdata
->tailsz
, true, need_invalidate
);
3118 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
3119 if (need_invalidate
)
3120 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
3121 req
->ReadChannelInfoOffset
=
3122 cpu_to_le16(offsetof(struct smb2_read_plain_req
, Buffer
));
3123 req
->ReadChannelInfoLength
=
3124 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
3125 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
3126 v1
->offset
= cpu_to_le64(rdata
->mr
->mr
->iova
);
3127 v1
->token
= cpu_to_le32(rdata
->mr
->mr
->rkey
);
3128 v1
->length
= cpu_to_le32(rdata
->mr
->mr
->length
);
3130 *total_len
+= sizeof(*v1
) - 1;
3133 if (request_type
& CHAINED_REQUEST
) {
3134 if (!(request_type
& END_OF_CHAIN
)) {
3135 /* next 8-byte aligned request */
3136 *total_len
= DIV_ROUND_UP(*total_len
, 8) * 8;
3137 shdr
->NextCommand
= cpu_to_le32(*total_len
);
3138 } else /* END_OF_CHAIN */
3139 shdr
->NextCommand
= 0;
3140 if (request_type
& RELATED_REQUEST
) {
3141 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
3143 * Related requests use info from previous read request
3146 shdr
->SessionId
= 0xFFFFFFFF;
3147 shdr
->TreeId
= 0xFFFFFFFF;
3148 req
->PersistentFileId
= 0xFFFFFFFF;
3149 req
->VolatileFileId
= 0xFFFFFFFF;
3152 if (remaining_bytes
> io_parms
->length
)
3153 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
3155 req
->RemainingBytes
= 0;
3162 smb2_readv_callback(struct mid_q_entry
*mid
)
3164 struct cifs_readdata
*rdata
= mid
->callback_data
;
3165 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
3166 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
3167 struct smb2_sync_hdr
*shdr
=
3168 (struct smb2_sync_hdr
*)rdata
->iov
[0].iov_base
;
3169 unsigned int credits_received
= 1;
3170 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
3172 .rq_pages
= rdata
->pages
,
3173 .rq_offset
= rdata
->page_offset
,
3174 .rq_npages
= rdata
->nr_pages
,
3175 .rq_pagesz
= rdata
->pagesz
,
3176 .rq_tailsz
= rdata
->tailsz
};
3178 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
3179 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
3182 switch (mid
->mid_state
) {
3183 case MID_RESPONSE_RECEIVED
:
3184 credits_received
= le16_to_cpu(shdr
->CreditRequest
);
3185 /* result already set, check signature */
3186 if (server
->sign
&& !mid
->decrypted
) {
3189 rc
= smb2_verify_signature(&rqst
, server
);
3191 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
3194 /* FIXME: should this be counted toward the initiating task? */
3195 task_io_account_read(rdata
->got_bytes
);
3196 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
3198 case MID_REQUEST_SUBMITTED
:
3199 case MID_RETRY_NEEDED
:
3200 rdata
->result
= -EAGAIN
;
3201 if (server
->sign
&& rdata
->got_bytes
)
3202 /* reset bytes number since we can not check a sign */
3203 rdata
->got_bytes
= 0;
3204 /* FIXME: should this be counted toward the initiating task? */
3205 task_io_account_read(rdata
->got_bytes
);
3206 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
3209 if (rdata
->result
!= -ENODATA
)
3210 rdata
->result
= -EIO
;
3212 #ifdef CONFIG_CIFS_SMB_DIRECT
3214 * If this rdata has a memmory registered, the MR can be freed
3215 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3216 * because they have limited number and are used for future I/Os
3219 smbd_deregister_mr(rdata
->mr
);
3224 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
3226 queue_work(cifsiod_wq
, &rdata
->work
);
3227 DeleteMidQEntry(mid
);
3228 add_credits(server
, credits_received
, 0);
3231 /* smb2_async_readv - send an async read, and set up mid to handle result */
3233 smb2_async_readv(struct cifs_readdata
*rdata
)
3237 struct smb2_sync_hdr
*shdr
;
3238 struct cifs_io_parms io_parms
;
3239 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
3241 struct TCP_Server_Info
*server
;
3242 unsigned int total_len
;
3244 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
3245 __func__
, rdata
->offset
, rdata
->bytes
);
3247 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
3248 io_parms
.offset
= rdata
->offset
;
3249 io_parms
.length
= rdata
->bytes
;
3250 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
3251 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
3252 io_parms
.pid
= rdata
->pid
;
3254 server
= io_parms
.tcon
->ses
->server
;
3256 rc
= smb2_new_read_req(
3257 (void **) &buf
, &total_len
, &io_parms
, rdata
, 0, 0);
3259 if (rc
== -EAGAIN
&& rdata
->credits
) {
3260 /* credits was reset by reconnect */
3262 /* reduce in_flight value since we won't send the req */
3263 spin_lock(&server
->req_lock
);
3264 server
->in_flight
--;
3265 spin_unlock(&server
->req_lock
);
3270 if (smb3_encryption_required(io_parms
.tcon
))
3271 flags
|= CIFS_TRANSFORM_REQ
;
3273 rdata
->iov
[0].iov_base
= buf
;
3274 rdata
->iov
[0].iov_len
= total_len
;
3276 shdr
= (struct smb2_sync_hdr
*)buf
;
3278 if (rdata
->credits
) {
3279 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
3280 SMB2_MAX_BUFFER_SIZE
));
3281 shdr
->CreditRequest
= shdr
->CreditCharge
;
3282 spin_lock(&server
->req_lock
);
3283 server
->credits
+= rdata
->credits
-
3284 le16_to_cpu(shdr
->CreditCharge
);
3285 spin_unlock(&server
->req_lock
);
3286 wake_up(&server
->request_q
);
3287 flags
|= CIFS_HAS_CREDITS
;
3290 kref_get(&rdata
->refcount
);
3291 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
3292 cifs_readv_receive
, smb2_readv_callback
,
3293 smb3_handle_read_data
, rdata
, flags
);
3295 kref_put(&rdata
->refcount
, cifs_readdata_release
);
3296 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
3297 trace_smb3_read_err(rc
, 0 /* xid */, io_parms
.persistent_fid
,
3298 io_parms
.tcon
->tid
, io_parms
.tcon
->ses
->Suid
,
3299 io_parms
.offset
, io_parms
.length
);
3301 trace_smb3_read_done(0 /* xid */, io_parms
.persistent_fid
,
3302 io_parms
.tcon
->tid
, io_parms
.tcon
->ses
->Suid
,
3303 io_parms
.offset
, io_parms
.length
);
3305 cifs_small_buf_release(buf
);
3310 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
3311 unsigned int *nbytes
, char **buf
, int *buf_type
)
3313 struct smb_rqst rqst
;
3314 int resp_buftype
, rc
= -EACCES
;
3315 struct smb2_read_plain_req
*req
= NULL
;
3316 struct smb2_read_rsp
*rsp
= NULL
;
3318 struct kvec rsp_iov
;
3319 unsigned int total_len
;
3320 int flags
= CIFS_LOG_ERROR
;
3321 struct cifs_ses
*ses
= io_parms
->tcon
->ses
;
3324 rc
= smb2_new_read_req((void **)&req
, &total_len
, io_parms
, NULL
, 0, 0);
3328 if (smb3_encryption_required(io_parms
->tcon
))
3329 flags
|= CIFS_TRANSFORM_REQ
;
3331 iov
[0].iov_base
= (char *)req
;
3332 iov
[0].iov_len
= total_len
;
3334 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3338 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3339 cifs_small_buf_release(req
);
3341 rsp
= (struct smb2_read_rsp
*)rsp_iov
.iov_base
;
3344 if (rc
!= -ENODATA
) {
3345 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
3346 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
3348 trace_smb3_read_err(rc
, xid
, req
->PersistentFileId
,
3349 io_parms
->tcon
->tid
, ses
->Suid
,
3350 io_parms
->offset
, io_parms
->length
);
3351 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3352 return rc
== -ENODATA
? 0 : rc
;
3354 trace_smb3_read_done(xid
, req
->PersistentFileId
,
3355 io_parms
->tcon
->tid
, ses
->Suid
,
3356 io_parms
->offset
, io_parms
->length
);
3358 *nbytes
= le32_to_cpu(rsp
->DataLength
);
3359 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
3360 (*nbytes
> io_parms
->length
)) {
3361 cifs_dbg(FYI
, "bad length %d for count %d\n",
3362 *nbytes
, io_parms
->length
);
3368 memcpy(*buf
, (char *)rsp
+ rsp
->DataOffset
, *nbytes
);
3369 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3370 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
3371 *buf
= rsp_iov
.iov_base
;
3372 if (resp_buftype
== CIFS_SMALL_BUFFER
)
3373 *buf_type
= CIFS_SMALL_BUFFER
;
3374 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
3375 *buf_type
= CIFS_LARGE_BUFFER
;
3381 * Check the mid_state and signature on received buffer (if any), and queue the
3382 * workqueue completion task.
3385 smb2_writev_callback(struct mid_q_entry
*mid
)
3387 struct cifs_writedata
*wdata
= mid
->callback_data
;
3388 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
3389 unsigned int written
;
3390 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
3391 unsigned int credits_received
= 1;
3393 switch (mid
->mid_state
) {
3394 case MID_RESPONSE_RECEIVED
:
3395 credits_received
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
3396 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
3397 if (wdata
->result
!= 0)
3400 written
= le32_to_cpu(rsp
->DataLength
);
3402 * Mask off high 16 bits when bytes written as returned
3403 * by the server is greater than bytes requested by the
3404 * client. OS/2 servers are known to set incorrect
3407 if (written
> wdata
->bytes
)
3410 if (written
< wdata
->bytes
)
3411 wdata
->result
= -ENOSPC
;
3413 wdata
->bytes
= written
;
3415 case MID_REQUEST_SUBMITTED
:
3416 case MID_RETRY_NEEDED
:
3417 wdata
->result
= -EAGAIN
;
3420 wdata
->result
= -EIO
;
3423 #ifdef CONFIG_CIFS_SMB_DIRECT
3425 * If this wdata has a memory registered, the MR can be freed
3426 * The number of MRs available is limited, it's important to recover
3427 * used MR as soon as I/O is finished. Hold MR longer in the later
3428 * I/O process can possibly result in I/O deadlock due to lack of MR
3429 * to send request on I/O retry
3432 smbd_deregister_mr(wdata
->mr
);
3437 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
3439 queue_work(cifsiod_wq
, &wdata
->work
);
3440 DeleteMidQEntry(mid
);
3441 add_credits(tcon
->ses
->server
, credits_received
, 0);
3444 /* smb2_async_writev - send an async write, and set up mid to handle result */
3446 smb2_async_writev(struct cifs_writedata
*wdata
,
3447 void (*release
)(struct kref
*kref
))
3449 int rc
= -EACCES
, flags
= 0;
3450 struct smb2_write_req
*req
= NULL
;
3451 struct smb2_sync_hdr
*shdr
;
3452 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
3453 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
3455 struct smb_rqst rqst
= { };
3456 unsigned int total_len
;
3458 rc
= smb2_plain_req_init(SMB2_WRITE
, tcon
, (void **) &req
, &total_len
);
3460 if (rc
== -EAGAIN
&& wdata
->credits
) {
3461 /* credits was reset by reconnect */
3463 /* reduce in_flight value since we won't send the req */
3464 spin_lock(&server
->req_lock
);
3465 server
->in_flight
--;
3466 spin_unlock(&server
->req_lock
);
3468 goto async_writev_out
;
3471 if (smb3_encryption_required(tcon
))
3472 flags
|= CIFS_TRANSFORM_REQ
;
3474 shdr
= (struct smb2_sync_hdr
*)req
;
3475 shdr
->ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
3477 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
3478 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
3479 req
->WriteChannelInfoOffset
= 0;
3480 req
->WriteChannelInfoLength
= 0;
3482 req
->Offset
= cpu_to_le64(wdata
->offset
);
3483 req
->DataOffset
= cpu_to_le16(
3484 offsetof(struct smb2_write_req
, Buffer
));
3485 req
->RemainingBytes
= 0;
3486 #ifdef CONFIG_CIFS_SMB_DIRECT
3488 * If we want to do a server RDMA read, fill in and append
3489 * smbd_buffer_descriptor_v1 to the end of write request
3491 if (server
->rdma
&& !server
->sign
&& wdata
->bytes
>=
3492 server
->smbd_conn
->rdma_readwrite_threshold
) {
3494 struct smbd_buffer_descriptor_v1
*v1
;
3495 bool need_invalidate
= server
->dialect
== SMB30_PROT_ID
;
3497 wdata
->mr
= smbd_register_mr(
3498 server
->smbd_conn
, wdata
->pages
,
3499 wdata
->nr_pages
, wdata
->page_offset
,
3500 wdata
->tailsz
, false, need_invalidate
);
3503 goto async_writev_out
;
3506 req
->DataOffset
= 0;
3507 if (wdata
->nr_pages
> 1)
3508 req
->RemainingBytes
=
3510 (wdata
->nr_pages
- 1) * wdata
->pagesz
-
3511 wdata
->page_offset
+ wdata
->tailsz
3514 req
->RemainingBytes
= cpu_to_le32(wdata
->tailsz
);
3515 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
3516 if (need_invalidate
)
3517 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
3518 req
->WriteChannelInfoOffset
=
3519 cpu_to_le16(offsetof(struct smb2_write_req
, Buffer
));
3520 req
->WriteChannelInfoLength
=
3521 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
3522 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
3523 v1
->offset
= cpu_to_le64(wdata
->mr
->mr
->iova
);
3524 v1
->token
= cpu_to_le32(wdata
->mr
->mr
->rkey
);
3525 v1
->length
= cpu_to_le32(wdata
->mr
->mr
->length
);
3528 iov
[0].iov_len
= total_len
- 1;
3529 iov
[0].iov_base
= (char *)req
;
3533 rqst
.rq_pages
= wdata
->pages
;
3534 rqst
.rq_offset
= wdata
->page_offset
;
3535 rqst
.rq_npages
= wdata
->nr_pages
;
3536 rqst
.rq_pagesz
= wdata
->pagesz
;
3537 rqst
.rq_tailsz
= wdata
->tailsz
;
3538 #ifdef CONFIG_CIFS_SMB_DIRECT
3540 iov
[0].iov_len
+= sizeof(struct smbd_buffer_descriptor_v1
);
3544 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
3545 wdata
->offset
, wdata
->bytes
);
3547 #ifdef CONFIG_CIFS_SMB_DIRECT
3548 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3550 req
->Length
= cpu_to_le32(wdata
->bytes
);
3552 req
->Length
= cpu_to_le32(wdata
->bytes
);
3555 if (wdata
->credits
) {
3556 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
3557 SMB2_MAX_BUFFER_SIZE
));
3558 shdr
->CreditRequest
= shdr
->CreditCharge
;
3559 spin_lock(&server
->req_lock
);
3560 server
->credits
+= wdata
->credits
-
3561 le16_to_cpu(shdr
->CreditCharge
);
3562 spin_unlock(&server
->req_lock
);
3563 wake_up(&server
->request_q
);
3564 flags
|= CIFS_HAS_CREDITS
;
3567 kref_get(&wdata
->refcount
);
3568 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, NULL
,
3572 trace_smb3_write_err(0 /* no xid */, req
->PersistentFileId
,
3573 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
3575 kref_put(&wdata
->refcount
, release
);
3576 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
3578 trace_smb3_write_done(0 /* no xid */, req
->PersistentFileId
,
3579 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
3583 cifs_small_buf_release(req
);
3588 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3589 * The length field from io_parms must be at least 1 and indicates a number of
3590 * elements with data to write that begins with position 1 in iov array. All
3591 * data length is specified by count.
3594 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
3595 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
3597 struct smb_rqst rqst
;
3599 struct smb2_write_req
*req
= NULL
;
3600 struct smb2_write_rsp
*rsp
= NULL
;
3602 struct kvec rsp_iov
;
3604 unsigned int total_len
;
3611 rc
= smb2_plain_req_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
,
3616 if (io_parms
->tcon
->ses
->server
== NULL
)
3617 return -ECONNABORTED
;
3619 if (smb3_encryption_required(io_parms
->tcon
))
3620 flags
|= CIFS_TRANSFORM_REQ
;
3622 req
->sync_hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
3624 req
->PersistentFileId
= io_parms
->persistent_fid
;
3625 req
->VolatileFileId
= io_parms
->volatile_fid
;
3626 req
->WriteChannelInfoOffset
= 0;
3627 req
->WriteChannelInfoLength
= 0;
3629 req
->Length
= cpu_to_le32(io_parms
->length
);
3630 req
->Offset
= cpu_to_le64(io_parms
->offset
);
3631 req
->DataOffset
= cpu_to_le16(
3632 offsetof(struct smb2_write_req
, Buffer
));
3633 req
->RemainingBytes
= 0;
3635 iov
[0].iov_base
= (char *)req
;
3637 iov
[0].iov_len
= total_len
- 1;
3639 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3641 rqst
.rq_nvec
= n_vec
+ 1;
3643 rc
= cifs_send_recv(xid
, io_parms
->tcon
->ses
, &rqst
,
3644 &resp_buftype
, flags
, &rsp_iov
);
3645 cifs_small_buf_release(req
);
3646 rsp
= (struct smb2_write_rsp
*)rsp_iov
.iov_base
;
3649 trace_smb3_write_err(xid
, req
->PersistentFileId
,
3650 io_parms
->tcon
->tid
,
3651 io_parms
->tcon
->ses
->Suid
,
3652 io_parms
->offset
, io_parms
->length
, rc
);
3653 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
3654 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
3656 *nbytes
= le32_to_cpu(rsp
->DataLength
);
3657 trace_smb3_write_done(xid
, req
->PersistentFileId
,
3658 io_parms
->tcon
->tid
,
3659 io_parms
->tcon
->ses
->Suid
,
3660 io_parms
->offset
, *nbytes
);
3663 free_rsp_buf(resp_buftype
, rsp
);
3668 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
3671 unsigned int entrycount
= 0;
3672 unsigned int next_offset
= 0;
3674 FILE_DIRECTORY_INFO
*dir_info
;
3676 if (bufstart
== NULL
)
3679 entryptr
= bufstart
;
3682 if (entryptr
+ next_offset
< entryptr
||
3683 entryptr
+ next_offset
> end_of_buf
||
3684 entryptr
+ next_offset
+ size
> end_of_buf
) {
3685 cifs_dbg(VFS
, "malformed search entry would overflow\n");
3689 entryptr
= entryptr
+ next_offset
;
3690 dir_info
= (FILE_DIRECTORY_INFO
*)entryptr
;
3692 len
= le32_to_cpu(dir_info
->FileNameLength
);
3693 if (entryptr
+ len
< entryptr
||
3694 entryptr
+ len
> end_of_buf
||
3695 entryptr
+ len
+ size
> end_of_buf
) {
3696 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
3701 *lastentry
= entryptr
;
3704 next_offset
= le32_to_cpu(dir_info
->NextEntryOffset
);
3716 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
3717 u64 persistent_fid
, u64 volatile_fid
, int index
,
3718 struct cifs_search_info
*srch_inf
)
3720 struct smb_rqst rqst
;
3721 struct smb2_query_directory_req
*req
;
3722 struct smb2_query_directory_rsp
*rsp
= NULL
;
3724 struct kvec rsp_iov
;
3727 int resp_buftype
= CIFS_NO_BUFFER
;
3728 unsigned char *bufptr
;
3729 struct TCP_Server_Info
*server
;
3730 struct cifs_ses
*ses
= tcon
->ses
;
3731 __le16 asteriks
= cpu_to_le16('*');
3733 unsigned int output_size
= CIFSMaxBufSize
;
3734 size_t info_buf_size
;
3736 unsigned int total_len
;
3738 if (ses
&& (ses
->server
))
3739 server
= ses
->server
;
3743 rc
= smb2_plain_req_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
,
3748 if (smb3_encryption_required(tcon
))
3749 flags
|= CIFS_TRANSFORM_REQ
;
3751 switch (srch_inf
->info_level
) {
3752 case SMB_FIND_FILE_DIRECTORY_INFO
:
3753 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
3754 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
3756 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
3757 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
3758 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
3761 cifs_dbg(VFS
, "info level %u isn't supported\n",
3762 srch_inf
->info_level
);
3767 req
->FileIndex
= cpu_to_le32(index
);
3768 req
->PersistentFileId
= persistent_fid
;
3769 req
->VolatileFileId
= volatile_fid
;
3772 bufptr
= req
->Buffer
;
3773 memcpy(bufptr
, &asteriks
, len
);
3775 req
->FileNameOffset
=
3776 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1);
3777 req
->FileNameLength
= cpu_to_le16(len
);
3779 * BB could be 30 bytes or so longer if we used SMB2 specific
3780 * buffer lengths, but this is safe and close enough.
3782 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
3783 output_size
= min_t(unsigned int, output_size
, 2 << 15);
3784 req
->OutputBufferLength
= cpu_to_le32(output_size
);
3786 iov
[0].iov_base
= (char *)req
;
3788 iov
[0].iov_len
= total_len
- 1;
3790 iov
[1].iov_base
= (char *)(req
->Buffer
);
3791 iov
[1].iov_len
= len
;
3793 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3797 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3798 cifs_small_buf_release(req
);
3799 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
.iov_base
;
3802 if (rc
== -ENODATA
&&
3803 rsp
->sync_hdr
.Status
== STATUS_NO_MORE_FILES
) {
3804 srch_inf
->endOfSearch
= true;
3807 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
3811 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
3812 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
3817 srch_inf
->unicode
= true;
3819 if (srch_inf
->ntwrk_buf_start
) {
3820 if (srch_inf
->smallBuf
)
3821 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
3823 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
3825 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
3826 srch_inf
->srch_entries_start
= srch_inf
->last_entry
=
3827 (char *)rsp
+ le16_to_cpu(rsp
->OutputBufferOffset
);
3828 end_of_smb
= rsp_iov
.iov_len
+ (char *)rsp
;
3829 srch_inf
->entries_in_buffer
=
3830 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
3831 &srch_inf
->last_entry
, info_buf_size
);
3832 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
3833 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
3834 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
3835 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
3836 if (resp_buftype
== CIFS_LARGE_BUFFER
)
3837 srch_inf
->smallBuf
= false;
3838 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
3839 srch_inf
->smallBuf
= true;
3841 cifs_dbg(VFS
, "illegal search buffer type\n");
3846 free_rsp_buf(resp_buftype
, rsp
);
3851 SMB2_set_info_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
,
3852 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, u8 info_class
,
3853 u8 info_type
, u32 additional_info
,
3854 void **data
, unsigned int *size
)
3856 struct smb2_set_info_req
*req
;
3857 struct kvec
*iov
= rqst
->rq_iov
;
3858 unsigned int i
, total_len
;
3861 rc
= smb2_plain_req_init(SMB2_SET_INFO
, tcon
, (void **) &req
, &total_len
);
3865 req
->sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3866 req
->InfoType
= info_type
;
3867 req
->FileInfoClass
= info_class
;
3868 req
->PersistentFileId
= persistent_fid
;
3869 req
->VolatileFileId
= volatile_fid
;
3870 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
3873 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1);
3874 req
->BufferLength
= cpu_to_le32(*size
);
3876 memcpy(req
->Buffer
, *data
, *size
);
3879 iov
[0].iov_base
= (char *)req
;
3881 iov
[0].iov_len
= total_len
- 1;
3883 for (i
= 1; i
< rqst
->rq_nvec
; i
++) {
3884 le32_add_cpu(&req
->BufferLength
, size
[i
]);
3885 iov
[i
].iov_base
= (char *)data
[i
];
3886 iov
[i
].iov_len
= size
[i
];
3893 SMB2_set_info_free(struct smb_rqst
*rqst
)
3895 if (rqst
&& rqst
->rq_iov
)
3896 cifs_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
3900 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3901 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, u8 info_class
,
3902 u8 info_type
, u32 additional_info
, unsigned int num
,
3903 void **data
, unsigned int *size
)
3905 struct smb_rqst rqst
;
3906 struct smb2_set_info_rsp
*rsp
= NULL
;
3908 struct kvec rsp_iov
;
3911 struct cifs_ses
*ses
= tcon
->ses
;
3914 if (!ses
|| !(ses
->server
))
3920 if (smb3_encryption_required(tcon
))
3921 flags
|= CIFS_TRANSFORM_REQ
;
3923 iov
= kmalloc_array(num
, sizeof(struct kvec
), GFP_KERNEL
);
3927 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3931 rc
= SMB2_set_info_init(tcon
, &rqst
, persistent_fid
, volatile_fid
, pid
,
3932 info_class
, info_type
, additional_info
,
3940 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
3942 SMB2_set_info_free(&rqst
);
3943 rsp
= (struct smb2_set_info_rsp
*)rsp_iov
.iov_base
;
3946 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
3947 trace_smb3_set_info_err(xid
, persistent_fid
, tcon
->tid
,
3948 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
3951 free_rsp_buf(resp_buftype
, rsp
);
3957 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3958 u64 volatile_fid
, u32 pid
, __le64
*eof
)
3960 struct smb2_file_eof_info info
;
3964 info
.EndOfFile
= *eof
;
3967 size
= sizeof(struct smb2_file_eof_info
);
3969 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3970 pid
, FILE_END_OF_FILE_INFORMATION
, SMB2_O_INFO_FILE
,
3971 0, 1, &data
, &size
);
3975 SMB2_set_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
3976 u64 persistent_fid
, u64 volatile_fid
,
3977 struct cifs_ntsd
*pnntsd
, int pacllen
, int aclflag
)
3979 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3980 current
->tgid
, 0, SMB2_O_INFO_SECURITY
, aclflag
,
3981 1, (void **)&pnntsd
, &pacllen
);
3985 SMB2_set_ea(const unsigned int xid
, struct cifs_tcon
*tcon
,
3986 u64 persistent_fid
, u64 volatile_fid
,
3987 struct smb2_file_full_ea_info
*buf
, int len
)
3989 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3990 current
->tgid
, FILE_FULL_EA_INFORMATION
, SMB2_O_INFO_FILE
,
3991 0, 1, (void **)&buf
, &len
);
3995 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3996 const u64 persistent_fid
, const u64 volatile_fid
,
3999 struct smb_rqst rqst
;
4001 struct smb2_oplock_break
*req
= NULL
;
4002 struct cifs_ses
*ses
= tcon
->ses
;
4003 int flags
= CIFS_OBREAK_OP
;
4004 unsigned int total_len
;
4006 struct kvec rsp_iov
;
4009 cifs_dbg(FYI
, "SMB2_oplock_break\n");
4010 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
,
4015 if (smb3_encryption_required(tcon
))
4016 flags
|= CIFS_TRANSFORM_REQ
;
4018 req
->VolatileFid
= volatile_fid
;
4019 req
->PersistentFid
= persistent_fid
;
4020 req
->OplockLevel
= oplock_level
;
4021 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
4023 flags
|= CIFS_NO_RESP
;
4025 iov
[0].iov_base
= (char *)req
;
4026 iov
[0].iov_len
= total_len
;
4028 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4032 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
4033 cifs_small_buf_release(req
);
4036 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
4037 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
4044 smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
4045 struct kstatfs
*kst
)
4047 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
4048 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
4049 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
4050 kst
->f_bfree
= kst
->f_bavail
=
4051 le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
4056 copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO
*response_data
,
4057 struct kstatfs
*kst
)
4059 kst
->f_bsize
= le32_to_cpu(response_data
->BlockSize
);
4060 kst
->f_blocks
= le64_to_cpu(response_data
->TotalBlocks
);
4061 kst
->f_bfree
= le64_to_cpu(response_data
->BlocksAvail
);
4062 if (response_data
->UserBlocksAvail
== cpu_to_le64(-1))
4063 kst
->f_bavail
= kst
->f_bfree
;
4065 kst
->f_bavail
= le64_to_cpu(response_data
->UserBlocksAvail
);
4066 if (response_data
->TotalFileNodes
!= cpu_to_le64(-1))
4067 kst
->f_files
= le64_to_cpu(response_data
->TotalFileNodes
);
4068 if (response_data
->FreeFileNodes
!= cpu_to_le64(-1))
4069 kst
->f_ffree
= le64_to_cpu(response_data
->FreeFileNodes
);
4075 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
4076 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
4079 struct smb2_query_info_req
*req
;
4080 unsigned int total_len
;
4082 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
4084 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
4087 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
,
4092 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
4093 req
->FileInfoClass
= level
;
4094 req
->PersistentFileId
= persistent_fid
;
4095 req
->VolatileFileId
= volatile_fid
;
4097 req
->InputBufferOffset
=
4098 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1);
4099 req
->OutputBufferLength
= cpu_to_le32(
4100 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1);
4102 iov
->iov_base
= (char *)req
;
4103 iov
->iov_len
= total_len
;
4108 SMB311_posix_qfs_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
4109 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
4111 struct smb_rqst rqst
;
4112 struct smb2_query_info_rsp
*rsp
= NULL
;
4114 struct kvec rsp_iov
;
4117 struct cifs_ses
*ses
= tcon
->ses
;
4118 FILE_SYSTEM_POSIX_INFO
*info
= NULL
;
4121 rc
= build_qfs_info_req(&iov
, tcon
, FS_POSIX_INFORMATION
,
4122 sizeof(FILE_SYSTEM_POSIX_INFO
),
4123 persistent_fid
, volatile_fid
);
4127 if (smb3_encryption_required(tcon
))
4128 flags
|= CIFS_TRANSFORM_REQ
;
4130 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4134 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4135 cifs_small_buf_release(iov
.iov_base
);
4137 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4138 goto posix_qfsinf_exit
;
4140 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4142 info
= (FILE_SYSTEM_POSIX_INFO
*)(
4143 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
4144 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
4145 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
4146 sizeof(FILE_SYSTEM_POSIX_INFO
));
4148 copy_posix_fs_info_to_kstatfs(info
, fsdata
);
4151 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4156 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
4157 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
4159 struct smb_rqst rqst
;
4160 struct smb2_query_info_rsp
*rsp
= NULL
;
4162 struct kvec rsp_iov
;
4165 struct cifs_ses
*ses
= tcon
->ses
;
4166 struct smb2_fs_full_size_info
*info
= NULL
;
4169 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
4170 sizeof(struct smb2_fs_full_size_info
),
4171 persistent_fid
, volatile_fid
);
4175 if (smb3_encryption_required(tcon
))
4176 flags
|= CIFS_TRANSFORM_REQ
;
4178 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4182 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4183 cifs_small_buf_release(iov
.iov_base
);
4185 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4188 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4190 info
= (struct smb2_fs_full_size_info
*)(
4191 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
4192 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
4193 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
4194 sizeof(struct smb2_fs_full_size_info
));
4196 smb2_copy_fs_info_to_kstatfs(info
, fsdata
);
4199 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4204 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
4205 u64 persistent_fid
, u64 volatile_fid
, int level
)
4207 struct smb_rqst rqst
;
4208 struct smb2_query_info_rsp
*rsp
= NULL
;
4210 struct kvec rsp_iov
;
4212 int resp_buftype
, max_len
, min_len
;
4213 struct cifs_ses
*ses
= tcon
->ses
;
4214 unsigned int rsp_len
, offset
;
4217 if (level
== FS_DEVICE_INFORMATION
) {
4218 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
4219 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
4220 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
4221 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
4222 min_len
= MIN_FS_ATTR_INFO_SIZE
;
4223 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
4224 max_len
= sizeof(struct smb3_fs_ss_info
);
4225 min_len
= sizeof(struct smb3_fs_ss_info
);
4226 } else if (level
== FS_VOLUME_INFORMATION
) {
4227 max_len
= sizeof(struct smb3_fs_vol_info
) + MAX_VOL_LABEL_LEN
;
4228 min_len
= sizeof(struct smb3_fs_vol_info
);
4230 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
4234 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
4235 persistent_fid
, volatile_fid
);
4239 if (smb3_encryption_required(tcon
))
4240 flags
|= CIFS_TRANSFORM_REQ
;
4242 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4246 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4247 cifs_small_buf_release(iov
.iov_base
);
4249 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4252 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4254 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
4255 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
4256 rc
= smb2_validate_iov(offset
, rsp_len
, &rsp_iov
, min_len
);
4260 if (level
== FS_ATTRIBUTE_INFORMATION
)
4261 memcpy(&tcon
->fsAttrInfo
, offset
4262 + (char *)rsp
, min_t(unsigned int,
4264 else if (level
== FS_DEVICE_INFORMATION
)
4265 memcpy(&tcon
->fsDevInfo
, offset
4266 + (char *)rsp
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
4267 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
4268 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
4269 (offset
+ (char *)rsp
);
4270 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
4271 tcon
->perf_sector_size
=
4272 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
4273 } else if (level
== FS_VOLUME_INFORMATION
) {
4274 struct smb3_fs_vol_info
*vol_info
= (struct smb3_fs_vol_info
*)
4275 (offset
+ (char *)rsp
);
4276 tcon
->vol_serial_number
= vol_info
->VolumeSerialNumber
;
4277 tcon
->vol_create_time
= vol_info
->VolumeCreationTime
;
4281 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4286 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
4287 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
4288 const __u32 num_lock
, struct smb2_lock_element
*buf
)
4290 struct smb_rqst rqst
;
4292 struct smb2_lock_req
*req
= NULL
;
4294 struct kvec rsp_iov
;
4297 int flags
= CIFS_NO_RESP
;
4298 unsigned int total_len
;
4300 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
4302 rc
= smb2_plain_req_init(SMB2_LOCK
, tcon
, (void **) &req
, &total_len
);
4306 if (smb3_encryption_required(tcon
))
4307 flags
|= CIFS_TRANSFORM_REQ
;
4309 req
->sync_hdr
.ProcessId
= cpu_to_le32(pid
);
4310 req
->LockCount
= cpu_to_le16(num_lock
);
4312 req
->PersistentFileId
= persist_fid
;
4313 req
->VolatileFileId
= volatile_fid
;
4315 count
= num_lock
* sizeof(struct smb2_lock_element
);
4317 iov
[0].iov_base
= (char *)req
;
4318 iov
[0].iov_len
= total_len
- sizeof(struct smb2_lock_element
);
4319 iov
[1].iov_base
= (char *)buf
;
4320 iov
[1].iov_len
= count
;
4322 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
4324 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4328 rc
= cifs_send_recv(xid
, tcon
->ses
, &rqst
, &resp_buf_type
, flags
,
4330 cifs_small_buf_release(req
);
4332 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
4333 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
4334 trace_smb3_lock_err(xid
, persist_fid
, tcon
->tid
,
4335 tcon
->ses
->Suid
, rc
);
4342 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
4343 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
4344 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
4347 struct smb2_lock_element lock
;
4349 lock
.Offset
= cpu_to_le64(offset
);
4350 lock
.Length
= cpu_to_le64(length
);
4351 lock
.Flags
= cpu_to_le32(lock_flags
);
4352 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
4353 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
4355 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
4359 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
4360 __u8
*lease_key
, const __le32 lease_state
)
4362 struct smb_rqst rqst
;
4364 struct smb2_lease_ack
*req
= NULL
;
4365 struct cifs_ses
*ses
= tcon
->ses
;
4366 int flags
= CIFS_OBREAK_OP
;
4367 unsigned int total_len
;
4369 struct kvec rsp_iov
;
4371 __u64
*please_key_high
;
4372 __u64
*please_key_low
;
4374 cifs_dbg(FYI
, "SMB2_lease_break\n");
4375 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
,
4380 if (smb3_encryption_required(tcon
))
4381 flags
|= CIFS_TRANSFORM_REQ
;
4383 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
4384 req
->StructureSize
= cpu_to_le16(36);
4387 memcpy(req
->LeaseKey
, lease_key
, 16);
4388 req
->LeaseState
= lease_state
;
4390 flags
|= CIFS_NO_RESP
;
4392 iov
[0].iov_base
= (char *)req
;
4393 iov
[0].iov_len
= total_len
;
4395 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4399 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
4400 cifs_small_buf_release(req
);
4402 please_key_low
= (__u64
*)req
->LeaseKey
;
4403 please_key_high
= (__u64
*)(req
->LeaseKey
+8);
4405 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
4406 trace_smb3_lease_err(le32_to_cpu(lease_state
), tcon
->tid
,
4407 ses
->Suid
, *please_key_low
, *please_key_high
, rc
);
4408 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);
4410 trace_smb3_lease_done(le32_to_cpu(lease_state
), tcon
->tid
,
4411 ses
->Suid
, *please_key_low
, *please_key_high
);