1 // SPDX-License-Identifier: LGPL-2.1
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
13 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
14 /* Note that there are handle based routines which must be */
15 /* treated slightly differently for reconnection purposes since we never */
16 /* want to reuse a stale file handle and only the caller knows the file info */
19 #include <linux/kernel.h>
20 #include <linux/vfs.h>
21 #include <linux/task_io_accounting_ops.h>
22 #include <linux/uaccess.h>
23 #include <linux/uuid.h>
24 #include <linux/pagemap.h>
25 #include <linux/xattr.h>
28 #include "cifsproto.h"
29 #include "smb2proto.h"
30 #include "cifs_unicode.h"
31 #include "cifs_debug.h"
33 #include "smb2status.h"
36 #include "cifs_spnego.h"
37 #include "smbdirect.h"
39 #ifdef CONFIG_CIFS_DFS_UPCALL
40 #include "dfs_cache.h"
42 #include "cached_dir.h"
45 * The following table defines the expected "StructureSize" of SMB2 requests
46 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
48 * Note that commands are defined in smb2pdu.h in le16 but the array below is
49 * indexed by command in host byte order.
51 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
52 /* SMB2_NEGOTIATE */ 36,
53 /* SMB2_SESSION_SETUP */ 25,
55 /* SMB2_TREE_CONNECT */ 9,
56 /* SMB2_TREE_DISCONNECT */ 4,
66 /* SMB2_QUERY_DIRECTORY */ 33,
67 /* SMB2_CHANGE_NOTIFY */ 32,
68 /* SMB2_QUERY_INFO */ 41,
69 /* SMB2_SET_INFO */ 33,
70 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
73 int smb3_encryption_required(const struct cifs_tcon
*tcon
)
75 if (!tcon
|| !tcon
->ses
)
77 if ((tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
) ||
78 (tcon
->share_flags
& SHI1005_FLAGS_ENCRYPT_DATA
))
81 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
87 smb2_hdr_assemble(struct smb2_hdr
*shdr
, __le16 smb2_cmd
,
88 const struct cifs_tcon
*tcon
,
89 struct TCP_Server_Info
*server
)
91 shdr
->ProtocolId
= SMB2_PROTO_NUMBER
;
92 shdr
->StructureSize
= cpu_to_le16(64);
93 shdr
->Command
= smb2_cmd
;
95 spin_lock(&server
->req_lock
);
96 /* Request up to 10 credits but don't go over the limit. */
97 if (server
->credits
>= server
->max_credits
)
98 shdr
->CreditRequest
= cpu_to_le16(0);
100 shdr
->CreditRequest
= cpu_to_le16(
101 min_t(int, server
->max_credits
-
102 server
->credits
, 10));
103 spin_unlock(&server
->req_lock
);
105 shdr
->CreditRequest
= cpu_to_le16(2);
107 shdr
->Id
.SyncId
.ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
112 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
113 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
114 if (server
&& (server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
115 shdr
->CreditCharge
= cpu_to_le16(1);
116 /* else CreditCharge MBZ */
118 shdr
->Id
.SyncId
.TreeId
= cpu_to_le32(tcon
->tid
);
119 /* Uid is not converted */
121 shdr
->SessionId
= cpu_to_le64(tcon
->ses
->Suid
);
124 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
125 * to pass the path on the Open SMB prefixed by \\server\share.
126 * Not sure when we would need to do the augmented path (if ever) and
127 * setting this flag breaks the SMB2 open operation since it is
128 * illegal to send an empty path name (without \\server\share prefix)
129 * when the DFS flag is set in the SMB open header. We could
130 * consider setting the flag on all operations other than open
131 * but it is safer to net set it for now.
133 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
134 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
136 if (server
&& server
->sign
&& !smb3_encryption_required(tcon
))
137 shdr
->Flags
|= SMB2_FLAGS_SIGNED
;
143 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
,
144 struct TCP_Server_Info
*server
)
147 struct nls_table
*nls_codepage
;
148 struct cifs_ses
*ses
;
152 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
153 * check for tcp and smb session status done differently
154 * for those three - in the calling routine.
160 * Need to also skip SMB2_IOCTL because it is used for checking nested dfs links in
161 * cifs_tree_connect().
163 if (smb2_command
== SMB2_TREE_CONNECT
|| smb2_command
== SMB2_IOCTL
)
166 spin_lock(&tcon
->tc_lock
);
167 if (tcon
->status
== TID_EXITING
) {
169 * only tree disconnect, open, and write,
170 * (and ulogoff which does not have tcon)
171 * are allowed as we start force umount.
173 if ((smb2_command
!= SMB2_WRITE
) &&
174 (smb2_command
!= SMB2_CREATE
) &&
175 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
176 spin_unlock(&tcon
->tc_lock
);
177 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
182 spin_unlock(&tcon
->tc_lock
);
183 if ((!tcon
->ses
) || (tcon
->ses
->ses_status
== SES_EXITING
) ||
184 (!tcon
->ses
->server
) || !server
)
188 retries
= server
->nr_targets
;
191 * Give demultiplex thread up to 10 seconds to each target available for
192 * reconnect -- should be greater than cifs socket timeout which is 7
195 while (server
->tcpStatus
== CifsNeedReconnect
) {
197 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
198 * here since they are implicitly done when session drops.
200 switch (smb2_command
) {
202 * BB Should we keep oplock break and add flush to exceptions?
204 case SMB2_TREE_DISCONNECT
:
207 case SMB2_OPLOCK_BREAK
:
211 rc
= wait_event_interruptible_timeout(server
->response_q
,
212 (server
->tcpStatus
!= CifsNeedReconnect
),
215 cifs_dbg(FYI
, "%s: aborting reconnect due to a received signal by the process\n",
220 /* are we still trying to reconnect? */
221 spin_lock(&server
->srv_lock
);
222 if (server
->tcpStatus
!= CifsNeedReconnect
) {
223 spin_unlock(&server
->srv_lock
);
226 spin_unlock(&server
->srv_lock
);
228 if (retries
&& --retries
)
232 * on "soft" mounts we wait once. Hard mounts keep
233 * retrying until process is killed or server comes
237 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
240 retries
= server
->nr_targets
;
243 spin_lock(&ses
->chan_lock
);
244 if (!cifs_chan_needs_reconnect(ses
, server
) && !tcon
->need_reconnect
) {
245 spin_unlock(&ses
->chan_lock
);
248 spin_unlock(&ses
->chan_lock
);
249 cifs_dbg(FYI
, "sess reconnect mask: 0x%lx, tcon reconnect: %d",
250 tcon
->ses
->chans_need_reconnect
,
251 tcon
->need_reconnect
);
253 nls_codepage
= load_nls_default();
256 * Recheck after acquire mutex. If another thread is negotiating
257 * and the server never sends an answer the socket will be closed
258 * and tcpStatus set to reconnect.
260 spin_lock(&server
->srv_lock
);
261 if (server
->tcpStatus
== CifsNeedReconnect
) {
262 spin_unlock(&server
->srv_lock
);
266 spin_unlock(&server
->srv_lock
);
269 * need to prevent multiple threads trying to simultaneously
270 * reconnect the same SMB session
272 spin_lock(&ses
->chan_lock
);
273 if (!cifs_chan_needs_reconnect(ses
, server
)) {
274 spin_unlock(&ses
->chan_lock
);
276 /* this means that we only need to tree connect */
277 if (tcon
->need_reconnect
)
278 goto skip_sess_setup
;
282 spin_unlock(&ses
->chan_lock
);
284 mutex_lock(&ses
->session_mutex
);
285 rc
= cifs_negotiate_protocol(0, ses
, server
);
287 rc
= cifs_setup_session(0, ses
, server
, nls_codepage
);
288 if ((rc
== -EACCES
) && !tcon
->retry
) {
289 mutex_unlock(&ses
->session_mutex
);
293 mutex_unlock(&ses
->session_mutex
);
297 mutex_unlock(&ses
->session_mutex
);
300 mutex_unlock(&ses
->session_mutex
);
303 mutex_lock(&ses
->session_mutex
);
304 if (!tcon
->need_reconnect
) {
305 mutex_unlock(&ses
->session_mutex
);
308 cifs_mark_open_files_invalid(tcon
);
309 if (tcon
->use_persistent
)
310 tcon
->need_reopen_files
= true;
312 rc
= cifs_tree_connect(0, tcon
, nls_codepage
);
313 mutex_unlock(&ses
->session_mutex
);
315 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
317 /* If sess reconnected but tcon didn't, something strange ... */
318 pr_warn_once("reconnect tcon failed rc = %d\n", rc
);
322 if (smb2_command
!= SMB2_INTERNAL_CMD
)
323 mod_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
325 atomic_inc(&tconInfoReconnectCount
);
328 * Check if handle based operation so we know whether we can continue
329 * or not without returning to caller to reset file handle.
332 * BB Is flush done by server on drop of tcp session? Should we special
333 * case it and skip above?
335 switch (smb2_command
) {
341 case SMB2_QUERY_DIRECTORY
:
342 case SMB2_CHANGE_NOTIFY
:
343 case SMB2_QUERY_INFO
:
348 unload_nls(nls_codepage
);
353 fill_small_buf(__le16 smb2_command
, struct cifs_tcon
*tcon
,
354 struct TCP_Server_Info
*server
,
356 unsigned int *total_len
)
358 struct smb2_pdu
*spdu
= buf
;
359 /* lookup word count ie StructureSize from table */
360 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_command
)];
363 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
364 * largest operations (Create)
368 smb2_hdr_assemble(&spdu
->hdr
, smb2_command
, tcon
, server
);
369 spdu
->StructureSize2
= cpu_to_le16(parmsize
);
371 *total_len
= parmsize
+ sizeof(struct smb2_hdr
);
375 * Allocate and return pointer to an SMB request hdr, and set basic
376 * SMB information in the SMB header. If the return code is zero, this
377 * function must have filled in request_buf pointer.
379 static int __smb2_plain_req_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
380 struct TCP_Server_Info
*server
,
381 void **request_buf
, unsigned int *total_len
)
383 /* BB eventually switch this to SMB2 specific small buf size */
384 if (smb2_command
== SMB2_SET_INFO
)
385 *request_buf
= cifs_buf_get();
387 *request_buf
= cifs_small_buf_get();
388 if (*request_buf
== NULL
) {
389 /* BB should we add a retry in here if not a writepage? */
393 fill_small_buf(smb2_command
, tcon
, server
,
394 (struct smb2_hdr
*)(*request_buf
),
398 uint16_t com_code
= le16_to_cpu(smb2_command
);
399 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
400 cifs_stats_inc(&tcon
->num_smbs_sent
);
406 static int smb2_plain_req_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
407 struct TCP_Server_Info
*server
,
408 void **request_buf
, unsigned int *total_len
)
412 rc
= smb2_reconnect(smb2_command
, tcon
, server
);
416 return __smb2_plain_req_init(smb2_command
, tcon
, server
, request_buf
,
420 static int smb2_ioctl_req_init(u32 opcode
, struct cifs_tcon
*tcon
,
421 struct TCP_Server_Info
*server
,
422 void **request_buf
, unsigned int *total_len
)
424 /* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */
425 if (opcode
== FSCTL_VALIDATE_NEGOTIATE_INFO
) {
426 return __smb2_plain_req_init(SMB2_IOCTL
, tcon
, server
,
427 request_buf
, total_len
);
429 return smb2_plain_req_init(SMB2_IOCTL
, tcon
, server
,
430 request_buf
, total_len
);
433 /* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */
436 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
438 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
439 pneg_ctxt
->DataLength
= cpu_to_le16(38);
440 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
441 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
442 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
443 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
447 build_compression_ctxt(struct smb2_compression_capabilities_context
*pneg_ctxt
)
449 pneg_ctxt
->ContextType
= SMB2_COMPRESSION_CAPABILITIES
;
450 pneg_ctxt
->DataLength
=
451 cpu_to_le16(sizeof(struct smb2_compression_capabilities_context
)
452 - sizeof(struct smb2_neg_context
));
453 pneg_ctxt
->CompressionAlgorithmCount
= cpu_to_le16(3);
454 pneg_ctxt
->CompressionAlgorithms
[0] = SMB3_COMPRESS_LZ77
;
455 pneg_ctxt
->CompressionAlgorithms
[1] = SMB3_COMPRESS_LZ77_HUFF
;
456 pneg_ctxt
->CompressionAlgorithms
[2] = SMB3_COMPRESS_LZNT1
;
460 build_signing_ctxt(struct smb2_signing_capabilities
*pneg_ctxt
)
462 unsigned int ctxt_len
= sizeof(struct smb2_signing_capabilities
);
463 unsigned short num_algs
= 1; /* number of signing algorithms sent */
465 pneg_ctxt
->ContextType
= SMB2_SIGNING_CAPABILITIES
;
467 * Context Data length must be rounded to multiple of 8 for some servers
469 pneg_ctxt
->DataLength
= cpu_to_le16(DIV_ROUND_UP(
470 sizeof(struct smb2_signing_capabilities
) -
471 sizeof(struct smb2_neg_context
) +
472 (num_algs
* 2 /* sizeof u16 */), 8) * 8);
473 pneg_ctxt
->SigningAlgorithmCount
= cpu_to_le16(num_algs
);
474 pneg_ctxt
->SigningAlgorithms
[0] = cpu_to_le16(SIGNING_ALG_AES_CMAC
);
476 ctxt_len
+= 2 /* sizeof le16 */ * num_algs
;
477 ctxt_len
= DIV_ROUND_UP(ctxt_len
, 8) * 8;
479 /* TBD add SIGNING_ALG_AES_GMAC and/or SIGNING_ALG_HMAC_SHA256 */
483 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
485 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
486 if (require_gcm_256
) {
487 pneg_ctxt
->DataLength
= cpu_to_le16(4); /* Cipher Count + 1 cipher */
488 pneg_ctxt
->CipherCount
= cpu_to_le16(1);
489 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES256_GCM
;
490 } else if (enable_gcm_256
) {
491 pneg_ctxt
->DataLength
= cpu_to_le16(8); /* Cipher Count + 3 ciphers */
492 pneg_ctxt
->CipherCount
= cpu_to_le16(3);
493 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_GCM
;
494 pneg_ctxt
->Ciphers
[1] = SMB2_ENCRYPTION_AES256_GCM
;
495 pneg_ctxt
->Ciphers
[2] = SMB2_ENCRYPTION_AES128_CCM
;
497 pneg_ctxt
->DataLength
= cpu_to_le16(6); /* Cipher Count + 2 ciphers */
498 pneg_ctxt
->CipherCount
= cpu_to_le16(2);
499 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_GCM
;
500 pneg_ctxt
->Ciphers
[1] = SMB2_ENCRYPTION_AES128_CCM
;
505 build_netname_ctxt(struct smb2_netname_neg_context
*pneg_ctxt
, char *hostname
)
507 struct nls_table
*cp
= load_nls_default();
509 pneg_ctxt
->ContextType
= SMB2_NETNAME_NEGOTIATE_CONTEXT_ID
;
511 /* copy up to max of first 100 bytes of server name to NetName field */
512 pneg_ctxt
->DataLength
= cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt
->NetName
, hostname
, 100, cp
));
513 /* context size is DataLength + minimal smb2_neg_context */
514 return DIV_ROUND_UP(le16_to_cpu(pneg_ctxt
->DataLength
) +
515 sizeof(struct smb2_neg_context
), 8) * 8;
519 build_posix_ctxt(struct smb2_posix_neg_context
*pneg_ctxt
)
521 pneg_ctxt
->ContextType
= SMB2_POSIX_EXTENSIONS_AVAILABLE
;
522 pneg_ctxt
->DataLength
= cpu_to_le16(POSIX_CTXT_DATA_LEN
);
523 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
524 pneg_ctxt
->Name
[0] = 0x93;
525 pneg_ctxt
->Name
[1] = 0xAD;
526 pneg_ctxt
->Name
[2] = 0x25;
527 pneg_ctxt
->Name
[3] = 0x50;
528 pneg_ctxt
->Name
[4] = 0x9C;
529 pneg_ctxt
->Name
[5] = 0xB4;
530 pneg_ctxt
->Name
[6] = 0x11;
531 pneg_ctxt
->Name
[7] = 0xE7;
532 pneg_ctxt
->Name
[8] = 0xB4;
533 pneg_ctxt
->Name
[9] = 0x23;
534 pneg_ctxt
->Name
[10] = 0x83;
535 pneg_ctxt
->Name
[11] = 0xDE;
536 pneg_ctxt
->Name
[12] = 0x96;
537 pneg_ctxt
->Name
[13] = 0x8B;
538 pneg_ctxt
->Name
[14] = 0xCD;
539 pneg_ctxt
->Name
[15] = 0x7C;
543 assemble_neg_contexts(struct smb2_negotiate_req
*req
,
544 struct TCP_Server_Info
*server
, unsigned int *total_len
)
547 char *hostname
= NULL
;
548 unsigned int ctxt_len
, neg_context_count
;
550 if (*total_len
> 200) {
551 /* In case length corrupted don't want to overrun smb buffer */
552 cifs_server_dbg(VFS
, "Bad frame length assembling neg contexts\n");
557 * round up total_len of fixed part of SMB3 negotiate request to 8
558 * byte boundary before adding negotiate contexts
560 *total_len
= roundup(*total_len
, 8);
562 pneg_ctxt
= (*total_len
) + (char *)req
;
563 req
->NegotiateContextOffset
= cpu_to_le32(*total_len
);
565 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
566 ctxt_len
= DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context
), 8) * 8;
567 *total_len
+= ctxt_len
;
568 pneg_ctxt
+= ctxt_len
;
570 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
571 ctxt_len
= DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context
), 8) * 8;
572 *total_len
+= ctxt_len
;
573 pneg_ctxt
+= ctxt_len
;
576 * secondary channels don't have the hostname field populated
577 * use the hostname field in the primary channel instead
579 hostname
= CIFS_SERVER_IS_CHAN(server
) ?
580 server
->primary_server
->hostname
: server
->hostname
;
581 if (hostname
&& (hostname
[0] != 0)) {
582 ctxt_len
= build_netname_ctxt((struct smb2_netname_neg_context
*)pneg_ctxt
,
584 *total_len
+= ctxt_len
;
585 pneg_ctxt
+= ctxt_len
;
586 neg_context_count
= 3;
588 neg_context_count
= 2;
590 build_posix_ctxt((struct smb2_posix_neg_context
*)pneg_ctxt
);
591 *total_len
+= sizeof(struct smb2_posix_neg_context
);
592 pneg_ctxt
+= sizeof(struct smb2_posix_neg_context
);
595 if (server
->compress_algorithm
) {
596 build_compression_ctxt((struct smb2_compression_capabilities_context
*)
598 ctxt_len
= DIV_ROUND_UP(
599 sizeof(struct smb2_compression_capabilities_context
),
601 *total_len
+= ctxt_len
;
602 pneg_ctxt
+= ctxt_len
;
606 if (enable_negotiate_signing
) {
607 ctxt_len
= build_signing_ctxt((struct smb2_signing_capabilities
*)
609 *total_len
+= ctxt_len
;
610 pneg_ctxt
+= ctxt_len
;
614 /* check for and add transport_capabilities and signing capabilities */
615 req
->NegotiateContextCount
= cpu_to_le16(neg_context_count
);
619 static void decode_preauth_context(struct smb2_preauth_neg_context
*ctxt
)
621 unsigned int len
= le16_to_cpu(ctxt
->DataLength
);
623 /* If invalid preauth context warn but use what we requested, SHA-512 */
624 if (len
< MIN_PREAUTH_CTXT_DATA_LEN
) {
625 pr_warn_once("server sent bad preauth context\n");
627 } else if (len
< MIN_PREAUTH_CTXT_DATA_LEN
+ le16_to_cpu(ctxt
->SaltLength
)) {
628 pr_warn_once("server sent invalid SaltLength\n");
631 if (le16_to_cpu(ctxt
->HashAlgorithmCount
) != 1)
632 pr_warn_once("Invalid SMB3 hash algorithm count\n");
633 if (ctxt
->HashAlgorithms
!= SMB2_PREAUTH_INTEGRITY_SHA512
)
634 pr_warn_once("unknown SMB3 hash algorithm\n");
637 static void decode_compress_ctx(struct TCP_Server_Info
*server
,
638 struct smb2_compression_capabilities_context
*ctxt
)
640 unsigned int len
= le16_to_cpu(ctxt
->DataLength
);
642 /* sizeof compress context is a one element compression capbility struct */
644 pr_warn_once("server sent bad compression cntxt\n");
647 if (le16_to_cpu(ctxt
->CompressionAlgorithmCount
) != 1) {
648 pr_warn_once("Invalid SMB3 compress algorithm count\n");
651 if (le16_to_cpu(ctxt
->CompressionAlgorithms
[0]) > 3) {
652 pr_warn_once("unknown compression algorithm\n");
655 server
->compress_algorithm
= ctxt
->CompressionAlgorithms
[0];
658 static int decode_encrypt_ctx(struct TCP_Server_Info
*server
,
659 struct smb2_encryption_neg_context
*ctxt
)
661 unsigned int len
= le16_to_cpu(ctxt
->DataLength
);
663 cifs_dbg(FYI
, "decode SMB3.11 encryption neg context of len %d\n", len
);
664 if (len
< MIN_ENCRYPT_CTXT_DATA_LEN
) {
665 pr_warn_once("server sent bad crypto ctxt len\n");
669 if (le16_to_cpu(ctxt
->CipherCount
) != 1) {
670 pr_warn_once("Invalid SMB3.11 cipher count\n");
673 cifs_dbg(FYI
, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt
->Ciphers
[0]));
674 if (require_gcm_256
) {
675 if (ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES256_GCM
) {
676 cifs_dbg(VFS
, "Server does not support requested encryption type (AES256 GCM)\n");
679 } else if (ctxt
->Ciphers
[0] == 0) {
681 * e.g. if server only supported AES256_CCM (very unlikely)
682 * or server supported no encryption types or had all disabled.
683 * Since GLOBAL_CAP_ENCRYPTION will be not set, in the case
684 * in which mount requested encryption ("seal") checks later
685 * on during tree connection will return proper rc, but if
686 * seal not requested by client, since server is allowed to
687 * return 0 to indicate no supported cipher, we can't fail here
689 server
->cipher_type
= 0;
690 server
->capabilities
&= ~SMB2_GLOBAL_CAP_ENCRYPTION
;
691 pr_warn_once("Server does not support requested encryption types\n");
693 } else if ((ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES128_CCM
) &&
694 (ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES128_GCM
) &&
695 (ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES256_GCM
)) {
696 /* server returned a cipher we didn't ask for */
697 pr_warn_once("Invalid SMB3.11 cipher returned\n");
700 server
->cipher_type
= ctxt
->Ciphers
[0];
701 server
->capabilities
|= SMB2_GLOBAL_CAP_ENCRYPTION
;
705 static void decode_signing_ctx(struct TCP_Server_Info
*server
,
706 struct smb2_signing_capabilities
*pctxt
)
708 unsigned int len
= le16_to_cpu(pctxt
->DataLength
);
710 if ((len
< 4) || (len
> 16)) {
711 pr_warn_once("server sent bad signing negcontext\n");
714 if (le16_to_cpu(pctxt
->SigningAlgorithmCount
) != 1) {
715 pr_warn_once("Invalid signing algorithm count\n");
718 if (le16_to_cpu(pctxt
->SigningAlgorithms
[0]) > 2) {
719 pr_warn_once("unknown signing algorithm\n");
723 server
->signing_negotiated
= true;
724 server
->signing_algorithm
= le16_to_cpu(pctxt
->SigningAlgorithms
[0]);
725 cifs_dbg(FYI
, "signing algorithm %d chosen\n",
726 server
->signing_algorithm
);
730 static int smb311_decode_neg_context(struct smb2_negotiate_rsp
*rsp
,
731 struct TCP_Server_Info
*server
,
732 unsigned int len_of_smb
)
734 struct smb2_neg_context
*pctx
;
735 unsigned int offset
= le32_to_cpu(rsp
->NegotiateContextOffset
);
736 unsigned int ctxt_cnt
= le16_to_cpu(rsp
->NegotiateContextCount
);
737 unsigned int len_of_ctxts
, i
;
740 cifs_dbg(FYI
, "decoding %d negotiate contexts\n", ctxt_cnt
);
741 if (len_of_smb
<= offset
) {
742 cifs_server_dbg(VFS
, "Invalid response: negotiate context offset\n");
746 len_of_ctxts
= len_of_smb
- offset
;
748 for (i
= 0; i
< ctxt_cnt
; i
++) {
750 /* check that offset is not beyond end of SMB */
751 if (len_of_ctxts
== 0)
754 if (len_of_ctxts
< sizeof(struct smb2_neg_context
))
757 pctx
= (struct smb2_neg_context
*)(offset
+ (char *)rsp
);
758 clen
= le16_to_cpu(pctx
->DataLength
);
759 if (clen
> len_of_ctxts
)
762 if (pctx
->ContextType
== SMB2_PREAUTH_INTEGRITY_CAPABILITIES
)
763 decode_preauth_context(
764 (struct smb2_preauth_neg_context
*)pctx
);
765 else if (pctx
->ContextType
== SMB2_ENCRYPTION_CAPABILITIES
)
766 rc
= decode_encrypt_ctx(server
,
767 (struct smb2_encryption_neg_context
*)pctx
);
768 else if (pctx
->ContextType
== SMB2_COMPRESSION_CAPABILITIES
)
769 decode_compress_ctx(server
,
770 (struct smb2_compression_capabilities_context
*)pctx
);
771 else if (pctx
->ContextType
== SMB2_POSIX_EXTENSIONS_AVAILABLE
)
772 server
->posix_ext_supported
= true;
773 else if (pctx
->ContextType
== SMB2_SIGNING_CAPABILITIES
)
774 decode_signing_ctx(server
,
775 (struct smb2_signing_capabilities
*)pctx
);
777 cifs_server_dbg(VFS
, "unknown negcontext of type %d ignored\n",
778 le16_to_cpu(pctx
->ContextType
));
782 /* offsets must be 8 byte aligned */
783 clen
= (clen
+ 7) & ~0x7;
784 offset
+= clen
+ sizeof(struct smb2_neg_context
);
785 len_of_ctxts
-= clen
;
790 static struct create_posix
*
791 create_posix_buf(umode_t mode
)
793 struct create_posix
*buf
;
795 buf
= kzalloc(sizeof(struct create_posix
),
800 buf
->ccontext
.DataOffset
=
801 cpu_to_le16(offsetof(struct create_posix
, Mode
));
802 buf
->ccontext
.DataLength
= cpu_to_le32(4);
803 buf
->ccontext
.NameOffset
=
804 cpu_to_le16(offsetof(struct create_posix
, Name
));
805 buf
->ccontext
.NameLength
= cpu_to_le16(16);
807 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
818 buf
->Name
[10] = 0x83;
819 buf
->Name
[11] = 0xDE;
820 buf
->Name
[12] = 0x96;
821 buf
->Name
[13] = 0x8B;
822 buf
->Name
[14] = 0xCD;
823 buf
->Name
[15] = 0x7C;
824 buf
->Mode
= cpu_to_le32(mode
);
825 cifs_dbg(FYI
, "mode on posix create 0%o\n", mode
);
830 add_posix_context(struct kvec
*iov
, unsigned int *num_iovec
, umode_t mode
)
832 struct smb2_create_req
*req
= iov
[0].iov_base
;
833 unsigned int num
= *num_iovec
;
835 iov
[num
].iov_base
= create_posix_buf(mode
);
836 if (mode
== ACL_NO_MODE
)
837 cifs_dbg(FYI
, "Invalid mode\n");
838 if (iov
[num
].iov_base
== NULL
)
840 iov
[num
].iov_len
= sizeof(struct create_posix
);
841 if (!req
->CreateContextsOffset
)
842 req
->CreateContextsOffset
= cpu_to_le32(
843 sizeof(struct smb2_create_req
) +
844 iov
[num
- 1].iov_len
);
845 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_posix
));
846 *num_iovec
= num
+ 1;
853 * SMB2 Worker functions follow:
855 * The general structure of the worker functions is:
856 * 1) Call smb2_init (assembles SMB2 header)
857 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
858 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
859 * 4) Decode SMB2 command specific fields in the fixed length area
860 * 5) Decode variable length data area (if any for this SMB2 command type)
861 * 6) Call free smb buffer
867 SMB2_negotiate(const unsigned int xid
,
868 struct cifs_ses
*ses
,
869 struct TCP_Server_Info
*server
)
871 struct smb_rqst rqst
;
872 struct smb2_negotiate_req
*req
;
873 struct smb2_negotiate_rsp
*rsp
;
878 int blob_offset
, blob_length
;
880 int flags
= CIFS_NEG_OP
;
881 unsigned int total_len
;
883 cifs_dbg(FYI
, "Negotiate protocol\n");
886 WARN(1, "%s: server is NULL!\n", __func__
);
890 rc
= smb2_plain_req_init(SMB2_NEGOTIATE
, NULL
, server
,
891 (void **) &req
, &total_len
);
895 req
->hdr
.SessionId
= 0;
897 memset(server
->preauth_sha_hash
, 0, SMB2_PREAUTH_HASH_SIZE
);
898 memset(ses
->preauth_sha_hash
, 0, SMB2_PREAUTH_HASH_SIZE
);
900 if (strcmp(server
->vals
->version_string
,
901 SMB3ANY_VERSION_STRING
) == 0) {
902 req
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
903 req
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
904 req
->Dialects
[2] = cpu_to_le16(SMB311_PROT_ID
);
905 req
->DialectCount
= cpu_to_le16(3);
907 } else if (strcmp(server
->vals
->version_string
,
908 SMBDEFAULT_VERSION_STRING
) == 0) {
909 req
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
910 req
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
911 req
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
912 req
->Dialects
[3] = cpu_to_le16(SMB311_PROT_ID
);
913 req
->DialectCount
= cpu_to_le16(4);
916 /* otherwise send specific dialect */
917 req
->Dialects
[0] = cpu_to_le16(server
->vals
->protocol_id
);
918 req
->DialectCount
= cpu_to_le16(1);
922 /* only one of SMB2 signing flags may be set in SMB2 request */
924 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
925 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
926 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
928 req
->SecurityMode
= 0;
930 req
->Capabilities
= cpu_to_le32(server
->vals
->req_capabilities
);
931 if (ses
->chan_max
> 1)
932 req
->Capabilities
|= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL
);
934 /* ClientGUID must be zero for SMB2.02 dialect */
935 if (server
->vals
->protocol_id
== SMB20_PROT_ID
)
936 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
938 memcpy(req
->ClientGUID
, server
->client_guid
,
939 SMB2_CLIENT_GUID_SIZE
);
940 if ((server
->vals
->protocol_id
== SMB311_PROT_ID
) ||
941 (strcmp(server
->vals
->version_string
,
942 SMB3ANY_VERSION_STRING
) == 0) ||
943 (strcmp(server
->vals
->version_string
,
944 SMBDEFAULT_VERSION_STRING
) == 0))
945 assemble_neg_contexts(req
, server
, &total_len
);
947 iov
[0].iov_base
= (char *)req
;
948 iov
[0].iov_len
= total_len
;
950 memset(&rqst
, 0, sizeof(struct smb_rqst
));
954 rc
= cifs_send_recv(xid
, ses
, server
,
955 &rqst
, &resp_buftype
, flags
, &rsp_iov
);
956 cifs_small_buf_release(req
);
957 rsp
= (struct smb2_negotiate_rsp
*)rsp_iov
.iov_base
;
959 * No tcon so can't do
960 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
962 if (rc
== -EOPNOTSUPP
) {
963 cifs_server_dbg(VFS
, "Dialect not supported by server. Consider specifying vers=1.0 or vers=2.0 on mount for accessing older servers\n");
968 if (strcmp(server
->vals
->version_string
,
969 SMB3ANY_VERSION_STRING
) == 0) {
970 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
972 "SMB2 dialect returned but not requested\n");
974 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
976 "SMB2.1 dialect returned but not requested\n");
978 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
)) {
979 /* ops set to 3.0 by default for default so update */
980 server
->ops
= &smb311_operations
;
981 server
->vals
= &smb311_values
;
983 } else if (strcmp(server
->vals
->version_string
,
984 SMBDEFAULT_VERSION_STRING
) == 0) {
985 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
987 "SMB2 dialect returned but not requested\n");
989 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
990 /* ops set to 3.0 by default for default so update */
991 server
->ops
= &smb21_operations
;
992 server
->vals
= &smb21_values
;
993 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
)) {
994 server
->ops
= &smb311_operations
;
995 server
->vals
= &smb311_values
;
997 } else if (le16_to_cpu(rsp
->DialectRevision
) !=
998 server
->vals
->protocol_id
) {
999 /* if requested single dialect ensure returned dialect matched */
1000 cifs_server_dbg(VFS
, "Invalid 0x%x dialect returned: not requested\n",
1001 le16_to_cpu(rsp
->DialectRevision
));
1005 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
1007 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
1008 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
1009 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
1010 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
1011 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
1012 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
1013 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
1014 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
1015 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
1016 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
1018 cifs_server_dbg(VFS
, "Invalid dialect returned by server 0x%x\n",
1019 le16_to_cpu(rsp
->DialectRevision
));
1023 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
1026 * Keep a copy of the hash after negprot. This hash will be
1027 * the starting hash value for all sessions made from this
1030 memcpy(server
->preauth_sha_hash
, ses
->preauth_sha_hash
,
1031 SMB2_PREAUTH_HASH_SIZE
);
1033 /* SMB2 only has an extended negflavor */
1034 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
1035 /* set it to the maximum buffer size value we can send with 1 credit */
1036 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
1037 SMB2_MAX_BUFFER_SIZE
);
1038 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
1039 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
1040 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
1041 if ((server
->sec_mode
& SMB2_SEC_MODE_FLAGS_ALL
) != server
->sec_mode
)
1042 cifs_dbg(FYI
, "Server returned unexpected security mode 0x%x\n",
1044 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
1045 /* Internal types */
1046 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
1049 * SMB3.0 supports only 1 cipher and doesn't have a encryption neg context
1050 * Set the cipher type manually.
1052 if (server
->dialect
== SMB30_PROT_ID
&& (server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
1053 server
->cipher_type
= SMB2_ENCRYPTION_AES128_CCM
;
1055 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
1056 (struct smb2_hdr
*)rsp
);
1058 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
1060 * ses->sectype = RawNTLMSSP;
1061 * but for time being this is our only auth choice so doesn't matter.
1062 * We just found a server which sets blob length to zero expecting raw.
1064 if (blob_length
== 0) {
1065 cifs_dbg(FYI
, "missing security blob on negprot\n");
1066 server
->sec_ntlmssp
= true;
1069 rc
= cifs_enable_signing(server
, ses
->sign
);
1073 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
1080 if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
)) {
1081 if (rsp
->NegotiateContextCount
)
1082 rc
= smb311_decode_neg_context(rsp
, server
,
1085 cifs_server_dbg(VFS
, "Missing expected negotiate contexts\n");
1088 free_rsp_buf(resp_buftype
, rsp
);
1092 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
1095 struct validate_negotiate_info_req
*pneg_inbuf
;
1096 struct validate_negotiate_info_rsp
*pneg_rsp
= NULL
;
1098 u32 inbuflen
; /* max of 4 dialects */
1099 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
1101 cifs_dbg(FYI
, "validate negotiate\n");
1103 /* In SMB3.11 preauth integrity supersedes validate negotiate */
1104 if (server
->dialect
== SMB311_PROT_ID
)
1108 * validation ioctl must be signed, so no point sending this if we
1109 * can not sign it (ie are not known user). Even if signing is not
1110 * required (enabled but not negotiated), in those cases we selectively
1111 * sign just this, the first and only signed request on a connection.
1112 * Having validation of negotiate info helps reduce attack vectors.
1114 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
)
1115 return 0; /* validation requires signing */
1117 if (tcon
->ses
->user_name
== NULL
) {
1118 cifs_dbg(FYI
, "Can't validate negotiate: null user mount\n");
1119 return 0; /* validation requires signing */
1122 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_NULL
)
1123 cifs_tcon_dbg(VFS
, "Unexpected null user (anonymous) auth flag sent by server\n");
1125 pneg_inbuf
= kmalloc(sizeof(*pneg_inbuf
), GFP_NOFS
);
1129 pneg_inbuf
->Capabilities
=
1130 cpu_to_le32(server
->vals
->req_capabilities
);
1131 if (tcon
->ses
->chan_max
> 1)
1132 pneg_inbuf
->Capabilities
|= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL
);
1134 memcpy(pneg_inbuf
->Guid
, server
->client_guid
,
1135 SMB2_CLIENT_GUID_SIZE
);
1137 if (tcon
->ses
->sign
)
1138 pneg_inbuf
->SecurityMode
=
1139 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
1140 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
1141 pneg_inbuf
->SecurityMode
=
1142 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
1144 pneg_inbuf
->SecurityMode
= 0;
1147 if (strcmp(server
->vals
->version_string
,
1148 SMB3ANY_VERSION_STRING
) == 0) {
1149 pneg_inbuf
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
1150 pneg_inbuf
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
1151 pneg_inbuf
->Dialects
[2] = cpu_to_le16(SMB311_PROT_ID
);
1152 pneg_inbuf
->DialectCount
= cpu_to_le16(3);
1153 /* SMB 2.1 not included so subtract one dialect from len */
1154 inbuflen
= sizeof(*pneg_inbuf
) -
1155 (sizeof(pneg_inbuf
->Dialects
[0]));
1156 } else if (strcmp(server
->vals
->version_string
,
1157 SMBDEFAULT_VERSION_STRING
) == 0) {
1158 pneg_inbuf
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
1159 pneg_inbuf
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
1160 pneg_inbuf
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
1161 pneg_inbuf
->Dialects
[3] = cpu_to_le16(SMB311_PROT_ID
);
1162 pneg_inbuf
->DialectCount
= cpu_to_le16(4);
1163 /* structure is big enough for 4 dialects */
1164 inbuflen
= sizeof(*pneg_inbuf
);
1166 /* otherwise specific dialect was requested */
1167 pneg_inbuf
->Dialects
[0] =
1168 cpu_to_le16(server
->vals
->protocol_id
);
1169 pneg_inbuf
->DialectCount
= cpu_to_le16(1);
1170 /* structure is big enough for 3 dialects, sending only 1 */
1171 inbuflen
= sizeof(*pneg_inbuf
) -
1172 sizeof(pneg_inbuf
->Dialects
[0]) * 2;
1175 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
1176 FSCTL_VALIDATE_NEGOTIATE_INFO
,
1177 (char *)pneg_inbuf
, inbuflen
, CIFSMaxBufSize
,
1178 (char **)&pneg_rsp
, &rsplen
);
1179 if (rc
== -EOPNOTSUPP
) {
1181 * Old Windows versions or Netapp SMB server can return
1182 * not supported error. Client should accept it.
1184 cifs_tcon_dbg(VFS
, "Server does not support validate negotiate\n");
1186 goto out_free_inbuf
;
1187 } else if (rc
!= 0) {
1188 cifs_tcon_dbg(VFS
, "validate protocol negotiate failed: %d\n",
1191 goto out_free_inbuf
;
1195 if (rsplen
!= sizeof(*pneg_rsp
)) {
1196 cifs_tcon_dbg(VFS
, "Invalid protocol negotiate response size: %d\n",
1199 /* relax check since Mac returns max bufsize allowed on ioctl */
1200 if (rsplen
> CIFSMaxBufSize
|| rsplen
< sizeof(*pneg_rsp
))
1204 /* check validate negotiate info response matches what we got earlier */
1205 if (pneg_rsp
->Dialect
!= cpu_to_le16(server
->dialect
))
1208 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(server
->sec_mode
))
1211 /* do not validate server guid because not saved at negprot time yet */
1213 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
1214 SMB2_LARGE_FILES
) != server
->capabilities
)
1217 /* validate negotiate successful */
1219 cifs_dbg(FYI
, "validate negotiate info successful\n");
1223 cifs_tcon_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
1232 smb2_select_sectype(struct TCP_Server_Info
*server
, enum securityEnum requested
)
1234 switch (requested
) {
1241 if (server
->sec_ntlmssp
&&
1242 (global_secflags
& CIFSSEC_MAY_NTLMSSP
))
1244 if ((server
->sec_kerberos
|| server
->sec_mskerberos
) &&
1245 (global_secflags
& CIFSSEC_MAY_KRB5
))
1253 struct SMB2_sess_data
{
1255 struct cifs_ses
*ses
;
1256 struct TCP_Server_Info
*server
;
1257 struct nls_table
*nls_cp
;
1258 void (*func
)(struct SMB2_sess_data
*);
1260 u64 previous_session
;
1262 /* we will send the SMB in three pieces:
1263 * a fixed length beginning part, an optional
1264 * SPNEGO blob (which can be zero length), and a
1265 * last part which will include the strings
1266 * and rest of bcc area. This allows us to avoid
1267 * a large buffer 17K allocation
1274 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
1277 struct cifs_ses
*ses
= sess_data
->ses
;
1278 struct TCP_Server_Info
*server
= sess_data
->server
;
1279 struct smb2_sess_setup_req
*req
;
1280 unsigned int total_len
;
1281 bool is_binding
= false;
1283 rc
= smb2_plain_req_init(SMB2_SESSION_SETUP
, NULL
, server
,
1289 spin_lock(&ses
->chan_lock
);
1290 is_binding
= !CIFS_ALL_CHANS_NEED_RECONNECT(ses
);
1291 spin_unlock(&ses
->chan_lock
);
1294 req
->hdr
.SessionId
= cpu_to_le64(ses
->Suid
);
1295 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1296 req
->PreviousSessionId
= 0;
1297 req
->Flags
= SMB2_SESSION_REQ_FLAG_BINDING
;
1298 cifs_dbg(FYI
, "Binding to sess id: %llx\n", ses
->Suid
);
1300 /* First session, not a reauthenticate */
1301 req
->hdr
.SessionId
= 0;
1303 * if reconnect, we need to send previous sess id
1306 req
->PreviousSessionId
= cpu_to_le64(sess_data
->previous_session
);
1307 req
->Flags
= 0; /* MBZ */
1308 cifs_dbg(FYI
, "Fresh session. Previous: %llx\n",
1309 sess_data
->previous_session
);
1312 /* enough to enable echos and oplocks and one max size write */
1313 req
->hdr
.CreditRequest
= cpu_to_le16(130);
1315 /* only one of SMB2 signing flags may be set in SMB2 request */
1317 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
1318 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
1319 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
1321 req
->SecurityMode
= 0;
1323 #ifdef CONFIG_CIFS_DFS_UPCALL
1324 req
->Capabilities
= cpu_to_le32(SMB2_GLOBAL_CAP_DFS
);
1326 req
->Capabilities
= 0;
1327 #endif /* DFS_UPCALL */
1329 req
->Channel
= 0; /* MBZ */
1331 sess_data
->iov
[0].iov_base
= (char *)req
;
1333 sess_data
->iov
[0].iov_len
= total_len
- 1;
1335 * This variable will be used to clear the buffer
1336 * allocated above in case of any error in the calling function.
1338 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
1344 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
1346 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
1347 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1351 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
1354 struct smb_rqst rqst
;
1355 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
1356 struct kvec rsp_iov
= { NULL
, 0 };
1358 /* Testing shows that buffer offset must be at location of Buffer[0] */
1359 req
->SecurityBufferOffset
=
1360 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) - 1 /* pad */);
1361 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
1363 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1364 rqst
.rq_iov
= sess_data
->iov
;
1367 /* BB add code to build os and lm fields */
1368 rc
= cifs_send_recv(sess_data
->xid
, sess_data
->ses
,
1371 &sess_data
->buf0_type
,
1372 CIFS_LOG_ERROR
| CIFS_SESS_OP
, &rsp_iov
);
1373 cifs_small_buf_release(sess_data
->iov
[0].iov_base
);
1374 memcpy(&sess_data
->iov
[0], &rsp_iov
, sizeof(struct kvec
));
1380 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
1383 struct cifs_ses
*ses
= sess_data
->ses
;
1384 struct TCP_Server_Info
*server
= sess_data
->server
;
1386 cifs_server_lock(server
);
1387 if (server
->ops
->generate_signingkey
) {
1388 rc
= server
->ops
->generate_signingkey(ses
, server
);
1391 "SMB3 session key generation failed\n");
1392 cifs_server_unlock(server
);
1396 if (!server
->session_estab
) {
1397 server
->sequence_number
= 0x2;
1398 server
->session_estab
= true;
1400 cifs_server_unlock(server
);
1402 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
1406 #ifdef CONFIG_CIFS_UPCALL
1408 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1411 struct cifs_ses
*ses
= sess_data
->ses
;
1412 struct TCP_Server_Info
*server
= sess_data
->server
;
1413 struct cifs_spnego_msg
*msg
;
1414 struct key
*spnego_key
= NULL
;
1415 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1416 bool is_binding
= false;
1418 rc
= SMB2_sess_alloc_buffer(sess_data
);
1422 spnego_key
= cifs_get_spnego_key(ses
, server
);
1423 if (IS_ERR(spnego_key
)) {
1424 rc
= PTR_ERR(spnego_key
);
1426 cifs_dbg(VFS
, "Verify user has a krb5 ticket and keyutils is installed\n");
1431 msg
= spnego_key
->payload
.data
[0];
1433 * check version field to make sure that cifs.upcall is
1434 * sending us a response in an expected form
1436 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
1437 cifs_dbg(VFS
, "bad cifs.upcall version. Expected %d got %d\n",
1438 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
1440 goto out_put_spnego_key
;
1443 spin_lock(&ses
->chan_lock
);
1444 is_binding
= !CIFS_ALL_CHANS_NEED_RECONNECT(ses
);
1445 spin_unlock(&ses
->chan_lock
);
1447 /* keep session key if binding */
1449 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
1451 if (!ses
->auth_key
.response
) {
1452 cifs_dbg(VFS
, "Kerberos can't allocate (%u bytes) memory\n",
1455 goto out_put_spnego_key
;
1457 ses
->auth_key
.len
= msg
->sesskey_len
;
1460 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
1461 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
1463 rc
= SMB2_sess_sendreceive(sess_data
);
1465 goto out_put_spnego_key
;
1467 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1468 /* keep session id and flags if binding */
1470 ses
->Suid
= le64_to_cpu(rsp
->hdr
.SessionId
);
1471 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1474 rc
= SMB2_sess_establish_session(sess_data
);
1476 key_invalidate(spnego_key
);
1477 key_put(spnego_key
);
1479 sess_data
->result
= rc
;
1480 sess_data
->func
= NULL
;
1481 SMB2_sess_free_buffer(sess_data
);
1485 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1487 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
1488 sess_data
->result
= -EOPNOTSUPP
;
1489 sess_data
->func
= NULL
;
1494 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
1497 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
1500 struct cifs_ses
*ses
= sess_data
->ses
;
1501 struct TCP_Server_Info
*server
= sess_data
->server
;
1502 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1503 unsigned char *ntlmssp_blob
= NULL
;
1504 bool use_spnego
= false; /* else use raw ntlmssp */
1505 u16 blob_length
= 0;
1506 bool is_binding
= false;
1509 * If memory allocation is successful, caller of this function
1512 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
1513 if (!ses
->ntlmssp
) {
1517 ses
->ntlmssp
->sesskey_per_smbsess
= true;
1519 rc
= SMB2_sess_alloc_buffer(sess_data
);
1523 rc
= build_ntlmssp_smb3_negotiate_blob(&ntlmssp_blob
,
1524 &blob_length
, ses
, server
,
1530 /* BB eventually need to add this */
1531 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1535 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1536 sess_data
->iov
[1].iov_len
= blob_length
;
1538 rc
= SMB2_sess_sendreceive(sess_data
);
1539 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1541 /* If true, rc here is expected and not an error */
1542 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
1543 rsp
->hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
1549 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) !=
1550 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
1551 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
1552 le16_to_cpu(rsp
->SecurityBufferOffset
));
1556 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
1557 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
1561 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
1563 spin_lock(&ses
->chan_lock
);
1564 is_binding
= !CIFS_ALL_CHANS_NEED_RECONNECT(ses
);
1565 spin_unlock(&ses
->chan_lock
);
1567 /* keep existing ses id and flags if binding */
1569 ses
->Suid
= le64_to_cpu(rsp
->hdr
.SessionId
);
1570 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1574 kfree(ntlmssp_blob
);
1575 SMB2_sess_free_buffer(sess_data
);
1577 sess_data
->result
= 0;
1578 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
1582 kfree(ses
->ntlmssp
);
1583 ses
->ntlmssp
= NULL
;
1584 sess_data
->result
= rc
;
1585 sess_data
->func
= NULL
;
1589 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
1592 struct cifs_ses
*ses
= sess_data
->ses
;
1593 struct TCP_Server_Info
*server
= sess_data
->server
;
1594 struct smb2_sess_setup_req
*req
;
1595 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1596 unsigned char *ntlmssp_blob
= NULL
;
1597 bool use_spnego
= false; /* else use raw ntlmssp */
1598 u16 blob_length
= 0;
1599 bool is_binding
= false;
1601 rc
= SMB2_sess_alloc_buffer(sess_data
);
1605 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
1606 req
->hdr
.SessionId
= cpu_to_le64(ses
->Suid
);
1608 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
,
1612 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
1617 /* BB eventually need to add this */
1618 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1622 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1623 sess_data
->iov
[1].iov_len
= blob_length
;
1625 rc
= SMB2_sess_sendreceive(sess_data
);
1629 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1631 spin_lock(&ses
->chan_lock
);
1632 is_binding
= !CIFS_ALL_CHANS_NEED_RECONNECT(ses
);
1633 spin_unlock(&ses
->chan_lock
);
1635 /* keep existing ses id and flags if binding */
1637 ses
->Suid
= le64_to_cpu(rsp
->hdr
.SessionId
);
1638 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1641 rc
= SMB2_sess_establish_session(sess_data
);
1642 #ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS
1643 if (ses
->server
->dialect
< SMB30_PROT_ID
) {
1644 cifs_dbg(VFS
, "%s: dumping generated SMB2 session keys\n", __func__
);
1646 * The session id is opaque in terms of endianness, so we can't
1647 * print it as a long long. we dump it as we got it on the wire
1649 cifs_dbg(VFS
, "Session Id %*ph\n", (int)sizeof(ses
->Suid
),
1651 cifs_dbg(VFS
, "Session Key %*ph\n",
1652 SMB2_NTLMV2_SESSKEY_SIZE
, ses
->auth_key
.response
);
1653 cifs_dbg(VFS
, "Signing Key %*ph\n",
1654 SMB3_SIGN_KEY_SIZE
, ses
->auth_key
.response
);
1658 kfree(ntlmssp_blob
);
1659 SMB2_sess_free_buffer(sess_data
);
1660 kfree(ses
->ntlmssp
);
1661 ses
->ntlmssp
= NULL
;
1662 sess_data
->result
= rc
;
1663 sess_data
->func
= NULL
;
1667 SMB2_select_sec(struct SMB2_sess_data
*sess_data
)
1670 struct cifs_ses
*ses
= sess_data
->ses
;
1671 struct TCP_Server_Info
*server
= sess_data
->server
;
1673 type
= smb2_select_sectype(server
, ses
->sectype
);
1674 cifs_dbg(FYI
, "sess setup type %d\n", type
);
1675 if (type
== Unspecified
) {
1676 cifs_dbg(VFS
, "Unable to select appropriate authentication method!\n");
1682 sess_data
->func
= SMB2_auth_kerberos
;
1685 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
1688 cifs_dbg(VFS
, "secType %d not supported!\n", type
);
1696 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
1697 struct TCP_Server_Info
*server
,
1698 const struct nls_table
*nls_cp
)
1701 struct SMB2_sess_data
*sess_data
;
1703 cifs_dbg(FYI
, "Session Setup\n");
1706 WARN(1, "%s: server is NULL!\n", __func__
);
1710 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
1714 sess_data
->xid
= xid
;
1715 sess_data
->ses
= ses
;
1716 sess_data
->server
= server
;
1717 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1718 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1719 sess_data
->previous_session
= ses
->Suid
;
1721 rc
= SMB2_select_sec(sess_data
);
1726 * Initialize the session hash with the server one.
1728 memcpy(ses
->preauth_sha_hash
, server
->preauth_sha_hash
,
1729 SMB2_PREAUTH_HASH_SIZE
);
1731 while (sess_data
->func
)
1732 sess_data
->func(sess_data
);
1734 if ((ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
) && (ses
->sign
))
1735 cifs_server_dbg(VFS
, "signing requested but authenticated as guest\n");
1736 rc
= sess_data
->result
;
1743 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1745 struct smb_rqst rqst
;
1746 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1748 struct TCP_Server_Info
*server
;
1750 unsigned int total_len
;
1752 struct kvec rsp_iov
;
1755 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1757 if (ses
&& (ses
->server
))
1758 server
= ses
->server
;
1762 /* no need to send SMB logoff if uid already closed due to reconnect */
1763 spin_lock(&ses
->chan_lock
);
1764 if (CIFS_ALL_CHANS_NEED_RECONNECT(ses
)) {
1765 spin_unlock(&ses
->chan_lock
);
1766 goto smb2_session_already_dead
;
1768 spin_unlock(&ses
->chan_lock
);
1770 rc
= smb2_plain_req_init(SMB2_LOGOFF
, NULL
, ses
->server
,
1771 (void **) &req
, &total_len
);
1775 /* since no tcon, smb2_init can not do this, so do here */
1776 req
->hdr
.SessionId
= cpu_to_le64(ses
->Suid
);
1778 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
1779 flags
|= CIFS_TRANSFORM_REQ
;
1780 else if (server
->sign
)
1781 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1783 flags
|= CIFS_NO_RSP_BUF
;
1785 iov
[0].iov_base
= (char *)req
;
1786 iov
[0].iov_len
= total_len
;
1788 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1792 rc
= cifs_send_recv(xid
, ses
, ses
->server
,
1793 &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
1794 cifs_small_buf_release(req
);
1796 * No tcon so can't do
1797 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1800 smb2_session_already_dead
:
1804 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1806 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1809 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1811 /* These are similar values to what Windows uses */
1812 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1814 tcon
->max_chunks
= 256;
1815 tcon
->max_bytes_chunk
= 1048576;
1816 tcon
->max_bytes_copy
= 16777216;
1820 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1821 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1823 struct smb_rqst rqst
;
1824 struct smb2_tree_connect_req
*req
;
1825 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1827 struct kvec rsp_iov
= { NULL
, 0 };
1831 __le16
*unc_path
= NULL
;
1833 unsigned int total_len
;
1834 struct TCP_Server_Info
*server
;
1836 /* always use master channel */
1837 server
= ses
->server
;
1839 cifs_dbg(FYI
, "TCON\n");
1841 if (!server
|| !tree
)
1844 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1845 if (unc_path
== NULL
)
1848 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1850 if (unc_path_len
< 2) {
1855 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1857 atomic_set(&tcon
->num_remote_opens
, 0);
1858 rc
= smb2_plain_req_init(SMB2_TREE_CONNECT
, tcon
, server
,
1859 (void **) &req
, &total_len
);
1865 if (smb3_encryption_required(tcon
))
1866 flags
|= CIFS_TRANSFORM_REQ
;
1868 iov
[0].iov_base
= (char *)req
;
1870 iov
[0].iov_len
= total_len
- 1;
1872 /* Testing shows that buffer offset must be at location of Buffer[0] */
1873 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1875 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1876 iov
[1].iov_base
= unc_path
;
1877 iov
[1].iov_len
= unc_path_len
;
1880 * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1
1881 * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1
1882 * (Samba servers don't always set the flag so also check if null user)
1884 if ((server
->dialect
== SMB311_PROT_ID
) &&
1885 !smb3_encryption_required(tcon
) &&
1886 !(ses
->session_flags
&
1887 (SMB2_SESSION_FLAG_IS_GUEST
|SMB2_SESSION_FLAG_IS_NULL
)) &&
1888 ((ses
->user_name
!= NULL
) || (ses
->sectype
== Kerberos
)))
1889 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1891 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1895 /* Need 64 for max size write so ask for more in case not there yet */
1896 req
->hdr
.CreditRequest
= cpu_to_le16(64);
1898 rc
= cifs_send_recv(xid
, ses
, server
,
1899 &rqst
, &resp_buftype
, flags
, &rsp_iov
);
1900 cifs_small_buf_release(req
);
1901 rsp
= (struct smb2_tree_connect_rsp
*)rsp_iov
.iov_base
;
1902 trace_smb3_tcon(xid
, tcon
->tid
, ses
->Suid
, tree
, rc
);
1903 if ((rc
!= 0) || (rsp
== NULL
)) {
1904 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1905 tcon
->need_reconnect
= true;
1906 goto tcon_error_exit
;
1909 switch (rsp
->ShareType
) {
1910 case SMB2_SHARE_TYPE_DISK
:
1911 cifs_dbg(FYI
, "connection to disk share\n");
1913 case SMB2_SHARE_TYPE_PIPE
:
1915 cifs_dbg(FYI
, "connection to pipe share\n");
1917 case SMB2_SHARE_TYPE_PRINT
:
1919 cifs_dbg(FYI
, "connection to printer\n");
1922 cifs_server_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1924 goto tcon_error_exit
;
1927 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1928 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1929 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1930 tcon
->tid
= le32_to_cpu(rsp
->hdr
.Id
.SyncId
.TreeId
);
1931 strscpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1933 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1934 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1935 cifs_tcon_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1938 !(server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
1939 cifs_tcon_dbg(VFS
, "Encryption is requested but not supported\n");
1941 init_copy_chunk_defaults(tcon
);
1942 if (server
->ops
->validate_negotiate
)
1943 rc
= server
->ops
->validate_negotiate(xid
, tcon
);
1946 free_rsp_buf(resp_buftype
, rsp
);
1951 if (rsp
&& rsp
->hdr
.Status
== STATUS_BAD_NETWORK_NAME
)
1952 cifs_tcon_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1957 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1959 struct smb_rqst rqst
;
1960 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1962 struct cifs_ses
*ses
= tcon
->ses
;
1964 unsigned int total_len
;
1966 struct kvec rsp_iov
;
1969 cifs_dbg(FYI
, "Tree Disconnect\n");
1971 if (!ses
|| !(ses
->server
))
1974 spin_lock(&ses
->chan_lock
);
1975 if ((tcon
->need_reconnect
) ||
1976 (CIFS_ALL_CHANS_NEED_RECONNECT(tcon
->ses
))) {
1977 spin_unlock(&ses
->chan_lock
);
1980 spin_unlock(&ses
->chan_lock
);
1982 invalidate_all_cached_dirs(tcon
);
1984 rc
= smb2_plain_req_init(SMB2_TREE_DISCONNECT
, tcon
, ses
->server
,
1990 if (smb3_encryption_required(tcon
))
1991 flags
|= CIFS_TRANSFORM_REQ
;
1993 flags
|= CIFS_NO_RSP_BUF
;
1995 iov
[0].iov_base
= (char *)req
;
1996 iov
[0].iov_len
= total_len
;
1998 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2002 rc
= cifs_send_recv(xid
, ses
, ses
->server
,
2003 &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
2004 cifs_small_buf_release(req
);
2006 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
2012 static struct create_durable
*
2013 create_durable_buf(void)
2015 struct create_durable
*buf
;
2017 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
2021 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
2022 (struct create_durable
, Data
));
2023 buf
->ccontext
.DataLength
= cpu_to_le32(16);
2024 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
2025 (struct create_durable
, Name
));
2026 buf
->ccontext
.NameLength
= cpu_to_le16(4);
2027 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
2035 static struct create_durable
*
2036 create_reconnect_durable_buf(struct cifs_fid
*fid
)
2038 struct create_durable
*buf
;
2040 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
2044 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
2045 (struct create_durable
, Data
));
2046 buf
->ccontext
.DataLength
= cpu_to_le32(16);
2047 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
2048 (struct create_durable
, Name
));
2049 buf
->ccontext
.NameLength
= cpu_to_le16(4);
2050 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
2051 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
2052 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
2061 parse_query_id_ctxt(struct create_context
*cc
, struct smb2_file_all_info
*buf
)
2063 struct create_on_disk_id
*pdisk_id
= (struct create_on_disk_id
*)cc
;
2065 cifs_dbg(FYI
, "parse query id context 0x%llx 0x%llx\n",
2066 pdisk_id
->DiskFileId
, pdisk_id
->VolumeId
);
2067 buf
->IndexNumber
= pdisk_id
->DiskFileId
;
2071 parse_posix_ctxt(struct create_context
*cc
, struct smb2_file_all_info
*info
,
2072 struct create_posix_rsp
*posix
)
2075 u8
*beg
= (u8
*)cc
+ le16_to_cpu(cc
->DataOffset
);
2076 u8
*end
= beg
+ le32_to_cpu(cc
->DataLength
);
2079 memset(posix
, 0, sizeof(*posix
));
2081 posix
->nlink
= le32_to_cpu(*(__le32
*)(beg
+ 0));
2082 posix
->reparse_tag
= le32_to_cpu(*(__le32
*)(beg
+ 4));
2083 posix
->mode
= le32_to_cpu(*(__le32
*)(beg
+ 8));
2086 sid_len
= posix_info_sid_size(sid
, end
);
2088 cifs_dbg(VFS
, "bad owner sid in posix create response\n");
2091 memcpy(&posix
->owner
, sid
, sid_len
);
2093 sid
= sid
+ sid_len
;
2094 sid_len
= posix_info_sid_size(sid
, end
);
2096 cifs_dbg(VFS
, "bad group sid in posix create response\n");
2099 memcpy(&posix
->group
, sid
, sid_len
);
2101 cifs_dbg(FYI
, "nlink=%d mode=%o reparse_tag=%x\n",
2102 posix
->nlink
, posix
->mode
, posix
->reparse_tag
);
2106 smb2_parse_contexts(struct TCP_Server_Info
*server
,
2107 struct smb2_create_rsp
*rsp
,
2108 unsigned int *epoch
, char *lease_key
, __u8
*oplock
,
2109 struct smb2_file_all_info
*buf
,
2110 struct create_posix_rsp
*posix
)
2113 struct create_context
*cc
;
2115 unsigned int remaining
;
2117 static const char smb3_create_tag_posix
[] = {
2118 0x93, 0xAD, 0x25, 0x50, 0x9C,
2119 0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83,
2120 0xDE, 0x96, 0x8B, 0xCD, 0x7C
2124 data_offset
= (char *)rsp
+ le32_to_cpu(rsp
->CreateContextsOffset
);
2125 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
2126 cc
= (struct create_context
*)data_offset
;
2128 /* Initialize inode number to 0 in case no valid data in qfid context */
2130 buf
->IndexNumber
= 0;
2132 while (remaining
>= sizeof(struct create_context
)) {
2133 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
2134 if (le16_to_cpu(cc
->NameLength
) == 4 &&
2135 strncmp(name
, SMB2_CREATE_REQUEST_LEASE
, 4) == 0)
2136 *oplock
= server
->ops
->parse_lease_buf(cc
, epoch
,
2138 else if (buf
&& (le16_to_cpu(cc
->NameLength
) == 4) &&
2139 strncmp(name
, SMB2_CREATE_QUERY_ON_DISK_ID
, 4) == 0)
2140 parse_query_id_ctxt(cc
, buf
);
2141 else if ((le16_to_cpu(cc
->NameLength
) == 16)) {
2143 memcmp(name
, smb3_create_tag_posix
, 16) == 0)
2144 parse_posix_ctxt(cc
, buf
, posix
);
2147 cifs_dbg(FYI, "Context not matched with len %d\n",
2148 le16_to_cpu(cc->NameLength));
2149 cifs_dump_mem("Cctxt name: ", name, 4);
2152 next
= le32_to_cpu(cc
->Next
);
2156 cc
= (struct create_context
*)((char *)cc
+ next
);
2159 if (rsp
->OplockLevel
!= SMB2_OPLOCK_LEVEL_LEASE
)
2160 *oplock
= rsp
->OplockLevel
;
2166 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
2167 unsigned int *num_iovec
, u8
*lease_key
, __u8
*oplock
)
2169 struct smb2_create_req
*req
= iov
[0].iov_base
;
2170 unsigned int num
= *num_iovec
;
2172 iov
[num
].iov_base
= server
->ops
->create_lease_buf(lease_key
, *oplock
);
2173 if (iov
[num
].iov_base
== NULL
)
2175 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
2176 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
2177 if (!req
->CreateContextsOffset
)
2178 req
->CreateContextsOffset
= cpu_to_le32(
2179 sizeof(struct smb2_create_req
) +
2180 iov
[num
- 1].iov_len
);
2181 le32_add_cpu(&req
->CreateContextsLength
,
2182 server
->vals
->create_lease_size
);
2183 *num_iovec
= num
+ 1;
2187 static struct create_durable_v2
*
2188 create_durable_v2_buf(struct cifs_open_parms
*oparms
)
2190 struct cifs_fid
*pfid
= oparms
->fid
;
2191 struct create_durable_v2
*buf
;
2193 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
2197 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
2198 (struct create_durable_v2
, dcontext
));
2199 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
2200 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
2201 (struct create_durable_v2
, Name
));
2202 buf
->ccontext
.NameLength
= cpu_to_le16(4);
2205 * NB: Handle timeout defaults to 0, which allows server to choose
2206 * (most servers default to 120 seconds) and most clients default to 0.
2207 * This can be overridden at mount ("handletimeout=") if the user wants
2208 * a different persistent (or resilient) handle timeout for all opens
2209 * opens on a particular SMB3 mount.
2211 buf
->dcontext
.Timeout
= cpu_to_le32(oparms
->tcon
->handle_timeout
);
2212 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
2213 generate_random_uuid(buf
->dcontext
.CreateGuid
);
2214 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
2216 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
2224 static struct create_durable_handle_reconnect_v2
*
2225 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
2227 struct create_durable_handle_reconnect_v2
*buf
;
2229 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
2234 buf
->ccontext
.DataOffset
=
2235 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
2237 buf
->ccontext
.DataLength
=
2238 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
2239 buf
->ccontext
.NameOffset
=
2240 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
2242 buf
->ccontext
.NameLength
= cpu_to_le16(4);
2244 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
2245 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
2246 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
2247 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
2249 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
2258 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
2259 struct cifs_open_parms
*oparms
)
2261 struct smb2_create_req
*req
= iov
[0].iov_base
;
2262 unsigned int num
= *num_iovec
;
2264 iov
[num
].iov_base
= create_durable_v2_buf(oparms
);
2265 if (iov
[num
].iov_base
== NULL
)
2267 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
2268 if (!req
->CreateContextsOffset
)
2269 req
->CreateContextsOffset
=
2270 cpu_to_le32(sizeof(struct smb2_create_req
) +
2272 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
2273 *num_iovec
= num
+ 1;
2278 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
2279 struct cifs_open_parms
*oparms
)
2281 struct smb2_create_req
*req
= iov
[0].iov_base
;
2282 unsigned int num
= *num_iovec
;
2284 /* indicate that we don't need to relock the file */
2285 oparms
->reconnect
= false;
2287 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
2288 if (iov
[num
].iov_base
== NULL
)
2290 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
2291 if (!req
->CreateContextsOffset
)
2292 req
->CreateContextsOffset
=
2293 cpu_to_le32(sizeof(struct smb2_create_req
) +
2295 le32_add_cpu(&req
->CreateContextsLength
,
2296 sizeof(struct create_durable_handle_reconnect_v2
));
2297 *num_iovec
= num
+ 1;
2302 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
2303 struct cifs_open_parms
*oparms
, bool use_persistent
)
2305 struct smb2_create_req
*req
= iov
[0].iov_base
;
2306 unsigned int num
= *num_iovec
;
2308 if (use_persistent
) {
2309 if (oparms
->reconnect
)
2310 return add_durable_reconnect_v2_context(iov
, num_iovec
,
2313 return add_durable_v2_context(iov
, num_iovec
, oparms
);
2316 if (oparms
->reconnect
) {
2317 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
2318 /* indicate that we don't need to relock the file */
2319 oparms
->reconnect
= false;
2321 iov
[num
].iov_base
= create_durable_buf();
2322 if (iov
[num
].iov_base
== NULL
)
2324 iov
[num
].iov_len
= sizeof(struct create_durable
);
2325 if (!req
->CreateContextsOffset
)
2326 req
->CreateContextsOffset
=
2327 cpu_to_le32(sizeof(struct smb2_create_req
) +
2329 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
2330 *num_iovec
= num
+ 1;
2334 /* See MS-SMB2 2.2.13.2.7 */
2335 static struct crt_twarp_ctxt
*
2336 create_twarp_buf(__u64 timewarp
)
2338 struct crt_twarp_ctxt
*buf
;
2340 buf
= kzalloc(sizeof(struct crt_twarp_ctxt
), GFP_KERNEL
);
2344 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
2345 (struct crt_twarp_ctxt
, Timestamp
));
2346 buf
->ccontext
.DataLength
= cpu_to_le32(8);
2347 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
2348 (struct crt_twarp_ctxt
, Name
));
2349 buf
->ccontext
.NameLength
= cpu_to_le16(4);
2350 /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
2355 buf
->Timestamp
= cpu_to_le64(timewarp
);
2359 /* See MS-SMB2 2.2.13.2.7 */
2361 add_twarp_context(struct kvec
*iov
, unsigned int *num_iovec
, __u64 timewarp
)
2363 struct smb2_create_req
*req
= iov
[0].iov_base
;
2364 unsigned int num
= *num_iovec
;
2366 iov
[num
].iov_base
= create_twarp_buf(timewarp
);
2367 if (iov
[num
].iov_base
== NULL
)
2369 iov
[num
].iov_len
= sizeof(struct crt_twarp_ctxt
);
2370 if (!req
->CreateContextsOffset
)
2371 req
->CreateContextsOffset
= cpu_to_le32(
2372 sizeof(struct smb2_create_req
) +
2373 iov
[num
- 1].iov_len
);
2374 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct crt_twarp_ctxt
));
2375 *num_iovec
= num
+ 1;
2379 /* See See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx */
2380 static void setup_owner_group_sids(char *buf
)
2382 struct owner_group_sids
*sids
= (struct owner_group_sids
*)buf
;
2384 /* Populate the user ownership fields S-1-5-88-1 */
2385 sids
->owner
.Revision
= 1;
2386 sids
->owner
.NumAuth
= 3;
2387 sids
->owner
.Authority
[5] = 5;
2388 sids
->owner
.SubAuthorities
[0] = cpu_to_le32(88);
2389 sids
->owner
.SubAuthorities
[1] = cpu_to_le32(1);
2390 sids
->owner
.SubAuthorities
[2] = cpu_to_le32(current_fsuid().val
);
2392 /* Populate the group ownership fields S-1-5-88-2 */
2393 sids
->group
.Revision
= 1;
2394 sids
->group
.NumAuth
= 3;
2395 sids
->group
.Authority
[5] = 5;
2396 sids
->group
.SubAuthorities
[0] = cpu_to_le32(88);
2397 sids
->group
.SubAuthorities
[1] = cpu_to_le32(2);
2398 sids
->group
.SubAuthorities
[2] = cpu_to_le32(current_fsgid().val
);
2400 cifs_dbg(FYI
, "owner S-1-5-88-1-%d, group S-1-5-88-2-%d\n", current_fsuid().val
, current_fsgid().val
);
2403 /* See MS-SMB2 2.2.13.2.2 and MS-DTYP 2.4.6 */
2404 static struct crt_sd_ctxt
*
2405 create_sd_buf(umode_t mode
, bool set_owner
, unsigned int *len
)
2407 struct crt_sd_ctxt
*buf
;
2409 unsigned int acelen
, acl_size
, ace_count
;
2410 unsigned int owner_offset
= 0;
2411 unsigned int group_offset
= 0;
2412 struct smb3_acl acl
;
2414 *len
= roundup(sizeof(struct crt_sd_ctxt
) + (sizeof(struct cifs_ace
) * 4), 8);
2417 /* sizeof(struct owner_group_sids) is already multiple of 8 so no need to round */
2418 *len
+= sizeof(struct owner_group_sids
);
2421 buf
= kzalloc(*len
, GFP_KERNEL
);
2425 ptr
= (__u8
*)&buf
[1];
2427 /* offset fields are from beginning of security descriptor not of create context */
2428 owner_offset
= ptr
- (__u8
*)&buf
->sd
;
2429 buf
->sd
.OffsetOwner
= cpu_to_le32(owner_offset
);
2430 group_offset
= owner_offset
+ offsetof(struct owner_group_sids
, group
);
2431 buf
->sd
.OffsetGroup
= cpu_to_le32(group_offset
);
2433 setup_owner_group_sids(ptr
);
2434 ptr
+= sizeof(struct owner_group_sids
);
2436 buf
->sd
.OffsetOwner
= 0;
2437 buf
->sd
.OffsetGroup
= 0;
2440 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof(struct crt_sd_ctxt
, sd
));
2441 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof(struct crt_sd_ctxt
, Name
));
2442 buf
->ccontext
.NameLength
= cpu_to_le16(4);
2443 /* SMB2_CREATE_SD_BUFFER_TOKEN is "SecD" */
2448 buf
->sd
.Revision
= 1; /* Must be one see MS-DTYP 2.4.6 */
2451 * ACL is "self relative" ie ACL is stored in contiguous block of memory
2452 * and "DP" ie the DACL is present
2454 buf
->sd
.Control
= cpu_to_le16(ACL_CONTROL_SR
| ACL_CONTROL_DP
);
2456 /* offset owner, group and Sbz1 and SACL are all zero */
2457 buf
->sd
.OffsetDacl
= cpu_to_le32(ptr
- (__u8
*)&buf
->sd
);
2458 /* Ship the ACL for now. we will copy it into buf later. */
2460 ptr
+= sizeof(struct smb3_acl
);
2462 /* create one ACE to hold the mode embedded in reserved special SID */
2463 acelen
= setup_special_mode_ACE((struct cifs_ace
*)ptr
, (__u64
)mode
);
2465 acl_size
= acelen
+ sizeof(struct smb3_acl
);
2469 /* we do not need to reallocate buffer to add the two more ACEs. plenty of space */
2470 acelen
= setup_special_user_owner_ACE((struct cifs_ace
*)ptr
);
2476 /* and one more ACE to allow access for authenticated users */
2477 acelen
= setup_authusers_ACE((struct cifs_ace
*)ptr
);
2482 acl
.AclRevision
= ACL_REVISION
; /* See 2.4.4.1 of MS-DTYP */
2483 acl
.AclSize
= cpu_to_le16(acl_size
);
2484 acl
.AceCount
= cpu_to_le16(ace_count
);
2485 memcpy(aclptr
, &acl
, sizeof(struct smb3_acl
));
2487 buf
->ccontext
.DataLength
= cpu_to_le32(ptr
- (__u8
*)&buf
->sd
);
2488 *len
= roundup(ptr
- (__u8
*)buf
, 8);
2494 add_sd_context(struct kvec
*iov
, unsigned int *num_iovec
, umode_t mode
, bool set_owner
)
2496 struct smb2_create_req
*req
= iov
[0].iov_base
;
2497 unsigned int num
= *num_iovec
;
2498 unsigned int len
= 0;
2500 iov
[num
].iov_base
= create_sd_buf(mode
, set_owner
, &len
);
2501 if (iov
[num
].iov_base
== NULL
)
2503 iov
[num
].iov_len
= len
;
2504 if (!req
->CreateContextsOffset
)
2505 req
->CreateContextsOffset
= cpu_to_le32(
2506 sizeof(struct smb2_create_req
) +
2507 iov
[num
- 1].iov_len
);
2508 le32_add_cpu(&req
->CreateContextsLength
, len
);
2509 *num_iovec
= num
+ 1;
2513 static struct crt_query_id_ctxt
*
2514 create_query_id_buf(void)
2516 struct crt_query_id_ctxt
*buf
;
2518 buf
= kzalloc(sizeof(struct crt_query_id_ctxt
), GFP_KERNEL
);
2522 buf
->ccontext
.DataOffset
= cpu_to_le16(0);
2523 buf
->ccontext
.DataLength
= cpu_to_le32(0);
2524 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
2525 (struct crt_query_id_ctxt
, Name
));
2526 buf
->ccontext
.NameLength
= cpu_to_le16(4);
2527 /* SMB2_CREATE_QUERY_ON_DISK_ID is "QFid" */
2535 /* See MS-SMB2 2.2.13.2.9 */
2537 add_query_id_context(struct kvec
*iov
, unsigned int *num_iovec
)
2539 struct smb2_create_req
*req
= iov
[0].iov_base
;
2540 unsigned int num
= *num_iovec
;
2542 iov
[num
].iov_base
= create_query_id_buf();
2543 if (iov
[num
].iov_base
== NULL
)
2545 iov
[num
].iov_len
= sizeof(struct crt_query_id_ctxt
);
2546 if (!req
->CreateContextsOffset
)
2547 req
->CreateContextsOffset
= cpu_to_le32(
2548 sizeof(struct smb2_create_req
) +
2549 iov
[num
- 1].iov_len
);
2550 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct crt_query_id_ctxt
));
2551 *num_iovec
= num
+ 1;
2556 alloc_path_with_tree_prefix(__le16
**out_path
, int *out_size
, int *out_len
,
2557 const char *treename
, const __le16
*path
)
2559 int treename_len
, path_len
;
2560 struct nls_table
*cp
;
2561 const __le16 sep
[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
2566 treename_len
= strlen(treename
);
2567 if (treename_len
< 2 || !(treename
[0] == '\\' && treename
[1] == '\\'))
2573 path_len
= UniStrnlen((wchar_t *)path
, PATH_MAX
);
2575 /* make room for one path separator only if @path isn't empty */
2576 *out_len
= treename_len
+ (path
[0] ? 1 : 0) + path_len
;
2579 * final path needs to be 8-byte aligned as specified in
2580 * MS-SMB2 2.2.13 SMB2 CREATE Request.
2582 *out_size
= roundup(*out_len
* sizeof(__le16
), 8);
2583 *out_path
= kzalloc(*out_size
+ sizeof(__le16
) /* null */, GFP_KERNEL
);
2587 cp
= load_nls_default();
2588 cifs_strtoUTF16(*out_path
, treename
, treename_len
, cp
);
2590 /* Do not append the separator if the path is empty */
2591 if (path
[0] != cpu_to_le16(0x0000)) {
2592 UniStrcat(*out_path
, sep
);
2593 UniStrcat(*out_path
, path
);
2601 int smb311_posix_mkdir(const unsigned int xid
, struct inode
*inode
,
2602 umode_t mode
, struct cifs_tcon
*tcon
,
2603 const char *full_path
,
2604 struct cifs_sb_info
*cifs_sb
)
2606 struct smb_rqst rqst
;
2607 struct smb2_create_req
*req
;
2608 struct smb2_create_rsp
*rsp
= NULL
;
2609 struct cifs_ses
*ses
= tcon
->ses
;
2610 struct kvec iov
[3]; /* make sure at least one for each open context */
2611 struct kvec rsp_iov
= {NULL
, 0};
2614 __le16
*copy_path
= NULL
;
2617 unsigned int n_iov
= 2;
2618 __u32 file_attributes
= 0;
2619 char *pc_buf
= NULL
;
2621 unsigned int total_len
;
2622 __le16
*utf16_path
= NULL
;
2623 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
2625 cifs_dbg(FYI
, "mkdir\n");
2627 /* resource #1: path allocation */
2628 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
2632 if (!ses
|| !server
) {
2637 /* resource #2: request */
2638 rc
= smb2_plain_req_init(SMB2_CREATE
, tcon
, server
,
2639 (void **) &req
, &total_len
);
2644 if (smb3_encryption_required(tcon
))
2645 flags
|= CIFS_TRANSFORM_REQ
;
2647 req
->ImpersonationLevel
= IL_IMPERSONATION
;
2648 req
->DesiredAccess
= cpu_to_le32(FILE_WRITE_ATTRIBUTES
);
2649 /* File attributes ignored on open (used in create though) */
2650 req
->FileAttributes
= cpu_to_le32(file_attributes
);
2651 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
2652 req
->CreateDisposition
= cpu_to_le32(FILE_CREATE
);
2653 req
->CreateOptions
= cpu_to_le32(CREATE_NOT_FILE
);
2655 iov
[0].iov_base
= (char *)req
;
2656 /* -1 since last byte is buf[0] which is sent below (path) */
2657 iov
[0].iov_len
= total_len
- 1;
2659 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
));
2661 /* [MS-SMB2] 2.2.13 NameOffset:
2662 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2663 * the SMB2 header, the file name includes a prefix that will
2664 * be processed during DFS name normalization as specified in
2665 * section 3.3.5.9. Otherwise, the file name is relative to
2666 * the share that is identified by the TreeId in the SMB2
2669 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
2672 req
->hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
2673 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
2675 tcon
->treeName
, utf16_path
);
2679 req
->NameLength
= cpu_to_le16(name_len
* 2);
2680 uni_path_len
= copy_size
;
2681 /* free before overwriting resource */
2683 utf16_path
= copy_path
;
2685 uni_path_len
= (2 * UniStrnlen((wchar_t *)utf16_path
, PATH_MAX
)) + 2;
2686 /* MUST set path len (NameLength) to 0 opening root of share */
2687 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
2688 if (uni_path_len
% 8 != 0) {
2689 copy_size
= roundup(uni_path_len
, 8);
2690 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
2695 memcpy((char *)copy_path
, (const char *)utf16_path
,
2697 uni_path_len
= copy_size
;
2698 /* free before overwriting resource */
2700 utf16_path
= copy_path
;
2704 iov
[1].iov_len
= uni_path_len
;
2705 iov
[1].iov_base
= utf16_path
;
2706 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_NONE
;
2708 if (tcon
->posix_extensions
) {
2709 /* resource #3: posix buf */
2710 rc
= add_posix_context(iov
, &n_iov
, mode
);
2713 pc_buf
= iov
[n_iov
-1].iov_base
;
2717 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2719 rqst
.rq_nvec
= n_iov
;
2721 /* no need to inc num_remote_opens because we close it just below */
2722 trace_smb3_posix_mkdir_enter(xid
, tcon
->tid
, ses
->Suid
, CREATE_NOT_FILE
,
2723 FILE_WRITE_ATTRIBUTES
);
2724 /* resource #4: response buffer */
2725 rc
= cifs_send_recv(xid
, ses
, server
,
2726 &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2728 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
2729 trace_smb3_posix_mkdir_err(xid
, tcon
->tid
, ses
->Suid
,
2731 FILE_WRITE_ATTRIBUTES
, rc
);
2732 goto err_free_rsp_buf
;
2736 * Although unlikely to be possible for rsp to be null and rc not set,
2737 * adding check below is slightly safer long term (and quiets Coverity
2740 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
2747 trace_smb3_posix_mkdir_done(xid
, rsp
->PersistentFileId
, tcon
->tid
, ses
->Suid
,
2748 CREATE_NOT_FILE
, FILE_WRITE_ATTRIBUTES
);
2750 SMB2_close(xid
, tcon
, rsp
->PersistentFileId
, rsp
->VolatileFileId
);
2752 /* Eventually save off posix specific response info and timestaps */
2755 free_rsp_buf(resp_buftype
, rsp
);
2758 cifs_small_buf_release(req
);
2765 SMB2_open_init(struct cifs_tcon
*tcon
, struct TCP_Server_Info
*server
,
2766 struct smb_rqst
*rqst
, __u8
*oplock
,
2767 struct cifs_open_parms
*oparms
, __le16
*path
)
2769 struct smb2_create_req
*req
;
2770 unsigned int n_iov
= 2;
2771 __u32 file_attributes
= 0;
2774 unsigned int total_len
;
2775 struct kvec
*iov
= rqst
->rq_iov
;
2779 rc
= smb2_plain_req_init(SMB2_CREATE
, tcon
, server
,
2780 (void **) &req
, &total_len
);
2784 iov
[0].iov_base
= (char *)req
;
2785 /* -1 since last byte is buf[0] which is sent below (path) */
2786 iov
[0].iov_len
= total_len
- 1;
2788 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
2789 file_attributes
|= ATTR_READONLY
;
2790 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
2791 file_attributes
|= ATTR_SYSTEM
;
2793 req
->ImpersonationLevel
= IL_IMPERSONATION
;
2794 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
2795 /* File attributes ignored on open (used in create though) */
2796 req
->FileAttributes
= cpu_to_le32(file_attributes
);
2797 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
2799 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
2800 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
2801 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
));
2803 /* [MS-SMB2] 2.2.13 NameOffset:
2804 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2805 * the SMB2 header, the file name includes a prefix that will
2806 * be processed during DFS name normalization as specified in
2807 * section 3.3.5.9. Otherwise, the file name is relative to
2808 * the share that is identified by the TreeId in the SMB2
2811 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
2814 req
->hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
2815 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
2817 tcon
->treeName
, path
);
2820 req
->NameLength
= cpu_to_le16(name_len
* 2);
2821 uni_path_len
= copy_size
;
2824 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
2825 /* MUST set path len (NameLength) to 0 opening root of share */
2826 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
2827 copy_size
= uni_path_len
;
2828 if (copy_size
% 8 != 0)
2829 copy_size
= roundup(copy_size
, 8);
2830 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
2833 memcpy((char *)copy_path
, (const char *)path
,
2835 uni_path_len
= copy_size
;
2839 iov
[1].iov_len
= uni_path_len
;
2840 iov
[1].iov_base
= path
;
2842 if ((!server
->oplocks
) || (tcon
->no_lease
))
2843 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2845 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
2846 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
2847 req
->RequestedOplockLevel
= *oplock
;
2848 else if (!(server
->capabilities
& SMB2_GLOBAL_CAP_DIRECTORY_LEASING
) &&
2849 (oparms
->create_options
& CREATE_NOT_FILE
))
2850 req
->RequestedOplockLevel
= *oplock
; /* no srv lease support */
2852 rc
= add_lease_context(server
, iov
, &n_iov
,
2853 oparms
->fid
->lease_key
, oplock
);
2858 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
2859 /* need to set Next field of lease context if we request it */
2860 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
2861 struct create_context
*ccontext
=
2862 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2864 cpu_to_le32(server
->vals
->create_lease_size
);
2867 rc
= add_durable_context(iov
, &n_iov
, oparms
,
2868 tcon
->use_persistent
);
2873 if (tcon
->posix_extensions
) {
2875 struct create_context
*ccontext
=
2876 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2878 cpu_to_le32(iov
[n_iov
-1].iov_len
);
2881 rc
= add_posix_context(iov
, &n_iov
, oparms
->mode
);
2886 if (tcon
->snapshot_time
) {
2887 cifs_dbg(FYI
, "adding snapshot context\n");
2889 struct create_context
*ccontext
=
2890 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2892 cpu_to_le32(iov
[n_iov
-1].iov_len
);
2895 rc
= add_twarp_context(iov
, &n_iov
, tcon
->snapshot_time
);
2900 if ((oparms
->disposition
!= FILE_OPEN
) && (oparms
->cifs_sb
)) {
2904 if ((oparms
->cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MODE_FROM_SID
) &&
2905 (oparms
->mode
!= ACL_NO_MODE
))
2909 oparms
->mode
= ACL_NO_MODE
;
2912 if (oparms
->cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UID_FROM_ACL
)
2917 if (set_owner
| set_mode
) {
2919 struct create_context
*ccontext
=
2920 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2921 ccontext
->Next
= cpu_to_le32(iov
[n_iov
-1].iov_len
);
2924 cifs_dbg(FYI
, "add sd with mode 0x%x\n", oparms
->mode
);
2925 rc
= add_sd_context(iov
, &n_iov
, oparms
->mode
, set_owner
);
2932 struct create_context
*ccontext
=
2933 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2934 ccontext
->Next
= cpu_to_le32(iov
[n_iov
-1].iov_len
);
2936 add_query_id_context(iov
, &n_iov
);
2938 rqst
->rq_nvec
= n_iov
;
2942 /* rq_iov[0] is the request and is released by cifs_small_buf_release().
2943 * All other vectors are freed by kfree().
2946 SMB2_open_free(struct smb_rqst
*rqst
)
2950 if (rqst
&& rqst
->rq_iov
) {
2951 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
);
2952 for (i
= 1; i
< rqst
->rq_nvec
; i
++)
2953 if (rqst
->rq_iov
[i
].iov_base
!= smb2_padding
)
2954 kfree(rqst
->rq_iov
[i
].iov_base
);
2959 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
2960 __u8
*oplock
, struct smb2_file_all_info
*buf
,
2961 struct create_posix_rsp
*posix
,
2962 struct kvec
*err_iov
, int *buftype
)
2964 struct smb_rqst rqst
;
2965 struct smb2_create_rsp
*rsp
= NULL
;
2966 struct cifs_tcon
*tcon
= oparms
->tcon
;
2967 struct cifs_ses
*ses
= tcon
->ses
;
2968 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
2969 struct kvec iov
[SMB2_CREATE_IOV_SIZE
];
2970 struct kvec rsp_iov
= {NULL
, 0};
2971 int resp_buftype
= CIFS_NO_BUFFER
;
2975 cifs_dbg(FYI
, "create/open\n");
2976 if (!ses
|| !server
)
2979 if (smb3_encryption_required(tcon
))
2980 flags
|= CIFS_TRANSFORM_REQ
;
2982 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2983 memset(&iov
, 0, sizeof(iov
));
2985 rqst
.rq_nvec
= SMB2_CREATE_IOV_SIZE
;
2987 rc
= SMB2_open_init(tcon
, server
,
2988 &rqst
, oplock
, oparms
, path
);
2992 trace_smb3_open_enter(xid
, tcon
->tid
, tcon
->ses
->Suid
,
2993 oparms
->create_options
, oparms
->desired_access
);
2995 rc
= cifs_send_recv(xid
, ses
, server
,
2996 &rqst
, &resp_buftype
, flags
,
2998 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
3001 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
3002 if (err_iov
&& rsp
) {
3004 *buftype
= resp_buftype
;
3005 resp_buftype
= CIFS_NO_BUFFER
;
3008 trace_smb3_open_err(xid
, tcon
->tid
, ses
->Suid
,
3009 oparms
->create_options
, oparms
->desired_access
, rc
);
3010 if (rc
== -EREMCHG
) {
3011 pr_warn_once("server share %s deleted\n",
3013 tcon
->need_reconnect
= true;
3016 } else if (rsp
== NULL
) /* unlikely to happen, but safer to check */
3019 trace_smb3_open_done(xid
, rsp
->PersistentFileId
, tcon
->tid
, ses
->Suid
,
3020 oparms
->create_options
, oparms
->desired_access
);
3022 atomic_inc(&tcon
->num_remote_opens
);
3023 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
3024 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
3025 oparms
->fid
->access
= oparms
->desired_access
;
3026 #ifdef CONFIG_CIFS_DEBUG2
3027 oparms
->fid
->mid
= le64_to_cpu(rsp
->hdr
.MessageId
);
3028 #endif /* CIFS_DEBUG2 */
3031 buf
->CreationTime
= rsp
->CreationTime
;
3032 buf
->LastAccessTime
= rsp
->LastAccessTime
;
3033 buf
->LastWriteTime
= rsp
->LastWriteTime
;
3034 buf
->ChangeTime
= rsp
->ChangeTime
;
3035 buf
->AllocationSize
= rsp
->AllocationSize
;
3036 buf
->EndOfFile
= rsp
->EndofFile
;
3037 buf
->Attributes
= rsp
->FileAttributes
;
3038 buf
->NumberOfLinks
= cpu_to_le32(1);
3039 buf
->DeletePending
= 0;
3043 smb2_parse_contexts(server
, rsp
, &oparms
->fid
->epoch
,
3044 oparms
->fid
->lease_key
, oplock
, buf
, posix
);
3046 SMB2_open_free(&rqst
);
3047 free_rsp_buf(resp_buftype
, rsp
);
3052 SMB2_ioctl_init(struct cifs_tcon
*tcon
, struct TCP_Server_Info
*server
,
3053 struct smb_rqst
*rqst
,
3054 u64 persistent_fid
, u64 volatile_fid
, u32 opcode
,
3055 char *in_data
, u32 indatalen
,
3056 __u32 max_response_size
)
3058 struct smb2_ioctl_req
*req
;
3059 struct kvec
*iov
= rqst
->rq_iov
;
3060 unsigned int total_len
;
3064 rc
= smb2_ioctl_req_init(opcode
, tcon
, server
,
3065 (void **) &req
, &total_len
);
3071 * indatalen is usually small at a couple of bytes max, so
3072 * just allocate through generic pool
3074 in_data_buf
= kmemdup(in_data
, indatalen
, GFP_NOFS
);
3076 cifs_small_buf_release(req
);
3081 req
->CtlCode
= cpu_to_le32(opcode
);
3082 req
->PersistentFileId
= persistent_fid
;
3083 req
->VolatileFileId
= volatile_fid
;
3085 iov
[0].iov_base
= (char *)req
;
3087 * If no input data, the size of ioctl struct in
3088 * protocol spec still includes a 1 byte data buffer,
3089 * but if input data passed to ioctl, we do not
3090 * want to double count this, so we do not send
3091 * the dummy one byte of data in iovec[0] if sending
3092 * input data (in iovec[1]).
3095 req
->InputCount
= cpu_to_le32(indatalen
);
3096 /* do not set InputOffset if no input data */
3098 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
));
3100 iov
[0].iov_len
= total_len
- 1;
3101 iov
[1].iov_base
= in_data_buf
;
3102 iov
[1].iov_len
= indatalen
;
3105 iov
[0].iov_len
= total_len
;
3108 req
->OutputOffset
= 0;
3109 req
->OutputCount
= 0; /* MBZ */
3112 * In most cases max_response_size is set to 16K (CIFSMaxBufSize)
3113 * We Could increase default MaxOutputResponse, but that could require
3114 * more credits. Windows typically sets this smaller, but for some
3115 * ioctls it may be useful to allow server to send more. No point
3116 * limiting what the server can send as long as fits in one credit
3117 * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want
3118 * to increase this limit up in the future.
3119 * Note that for snapshot queries that servers like Azure expect that
3120 * the first query be minimal size (and just used to get the number/size
3121 * of previous versions) so response size must be specified as EXACTLY
3122 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
3123 * of eight bytes. Currently that is the only case where we set max
3124 * response size smaller.
3126 req
->MaxOutputResponse
= cpu_to_le32(max_response_size
);
3127 req
->hdr
.CreditCharge
=
3128 cpu_to_le16(DIV_ROUND_UP(max(indatalen
, max_response_size
),
3129 SMB2_MAX_BUFFER_SIZE
));
3130 /* always an FSCTL (for now) */
3131 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
3133 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
3134 if (opcode
== FSCTL_VALIDATE_NEGOTIATE_INFO
)
3135 req
->hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
3141 SMB2_ioctl_free(struct smb_rqst
*rqst
)
3144 if (rqst
&& rqst
->rq_iov
) {
3145 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
3146 for (i
= 1; i
< rqst
->rq_nvec
; i
++)
3147 if (rqst
->rq_iov
[i
].iov_base
!= smb2_padding
)
3148 kfree(rqst
->rq_iov
[i
].iov_base
);
3154 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
3157 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3158 u64 volatile_fid
, u32 opcode
, char *in_data
, u32 indatalen
,
3159 u32 max_out_data_len
, char **out_data
,
3160 u32
*plen
/* returned data len */)
3162 struct smb_rqst rqst
;
3163 struct smb2_ioctl_rsp
*rsp
= NULL
;
3164 struct cifs_ses
*ses
;
3165 struct TCP_Server_Info
*server
;
3166 struct kvec iov
[SMB2_IOCTL_IOV_SIZE
];
3167 struct kvec rsp_iov
= {NULL
, 0};
3168 int resp_buftype
= CIFS_NO_BUFFER
;
3172 cifs_dbg(FYI
, "SMB2 IOCTL\n");
3174 if (out_data
!= NULL
)
3177 /* zero out returned data len, in case of error */
3188 server
= cifs_pick_channel(ses
);
3192 if (smb3_encryption_required(tcon
))
3193 flags
|= CIFS_TRANSFORM_REQ
;
3195 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3196 memset(&iov
, 0, sizeof(iov
));
3198 rqst
.rq_nvec
= SMB2_IOCTL_IOV_SIZE
;
3200 rc
= SMB2_ioctl_init(tcon
, server
,
3201 &rqst
, persistent_fid
, volatile_fid
, opcode
,
3202 in_data
, indatalen
, max_out_data_len
);
3206 rc
= cifs_send_recv(xid
, ses
, server
,
3207 &rqst
, &resp_buftype
, flags
,
3209 rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
.iov_base
;
3212 trace_smb3_fsctl_err(xid
, persistent_fid
, tcon
->tid
,
3213 ses
->Suid
, 0, opcode
, rc
);
3215 if ((rc
!= 0) && (rc
!= -EINVAL
) && (rc
!= -E2BIG
)) {
3216 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
3218 } else if (rc
== -EINVAL
) {
3219 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
3220 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
3221 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
3224 } else if (rc
== -E2BIG
) {
3225 if (opcode
!= FSCTL_QUERY_ALLOCATED_RANGES
) {
3226 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
3231 /* check if caller wants to look at return data or just return rc */
3232 if ((plen
== NULL
) || (out_data
== NULL
))
3236 * Although unlikely to be possible for rsp to be null and rc not set,
3237 * adding check below is slightly safer long term (and quiets Coverity
3245 *plen
= le32_to_cpu(rsp
->OutputCount
);
3247 /* We check for obvious errors in the output buffer length and offset */
3249 goto ioctl_exit
; /* server returned no data */
3250 else if (*plen
> rsp_iov
.iov_len
|| *plen
> 0xFF00) {
3251 cifs_tcon_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
3257 if (rsp_iov
.iov_len
- *plen
< le32_to_cpu(rsp
->OutputOffset
)) {
3258 cifs_tcon_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
3259 le32_to_cpu(rsp
->OutputOffset
));
3265 *out_data
= kmemdup((char *)rsp
+ le32_to_cpu(rsp
->OutputOffset
),
3267 if (*out_data
== NULL
) {
3273 SMB2_ioctl_free(&rqst
);
3274 free_rsp_buf(resp_buftype
, rsp
);
3279 * Individual callers to ioctl worker function follow
3283 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
3284 u64 persistent_fid
, u64 volatile_fid
)
3287 struct compress_ioctl fsctl_input
;
3288 char *ret_data
= NULL
;
3290 fsctl_input
.CompressionState
=
3291 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
3293 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
3294 FSCTL_SET_COMPRESSION
,
3295 (char *)&fsctl_input
/* data input */,
3296 2 /* in data len */, CIFSMaxBufSize
/* max out data */,
3297 &ret_data
/* out data */, NULL
);
3299 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
3305 SMB2_close_init(struct cifs_tcon
*tcon
, struct TCP_Server_Info
*server
,
3306 struct smb_rqst
*rqst
,
3307 u64 persistent_fid
, u64 volatile_fid
, bool query_attrs
)
3309 struct smb2_close_req
*req
;
3310 struct kvec
*iov
= rqst
->rq_iov
;
3311 unsigned int total_len
;
3314 rc
= smb2_plain_req_init(SMB2_CLOSE
, tcon
, server
,
3315 (void **) &req
, &total_len
);
3319 req
->PersistentFileId
= persistent_fid
;
3320 req
->VolatileFileId
= volatile_fid
;
3322 req
->Flags
= SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB
;
3325 iov
[0].iov_base
= (char *)req
;
3326 iov
[0].iov_len
= total_len
;
3332 SMB2_close_free(struct smb_rqst
*rqst
)
3334 if (rqst
&& rqst
->rq_iov
)
3335 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
3339 __SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
3340 u64 persistent_fid
, u64 volatile_fid
,
3341 struct smb2_file_network_open_info
*pbuf
)
3343 struct smb_rqst rqst
;
3344 struct smb2_close_rsp
*rsp
= NULL
;
3345 struct cifs_ses
*ses
= tcon
->ses
;
3346 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
3348 struct kvec rsp_iov
;
3349 int resp_buftype
= CIFS_NO_BUFFER
;
3352 bool query_attrs
= false;
3354 cifs_dbg(FYI
, "Close\n");
3356 if (!ses
|| !server
)
3359 if (smb3_encryption_required(tcon
))
3360 flags
|= CIFS_TRANSFORM_REQ
;
3362 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3363 memset(&iov
, 0, sizeof(iov
));
3367 /* check if need to ask server to return timestamps in close response */
3371 trace_smb3_close_enter(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
);
3372 rc
= SMB2_close_init(tcon
, server
,
3373 &rqst
, persistent_fid
, volatile_fid
,
3378 rc
= cifs_send_recv(xid
, ses
, server
,
3379 &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3380 rsp
= (struct smb2_close_rsp
*)rsp_iov
.iov_base
;
3383 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
3384 trace_smb3_close_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
3388 trace_smb3_close_done(xid
, persistent_fid
, tcon
->tid
,
3391 * Note that have to subtract 4 since struct network_open_info
3392 * has a final 4 byte pad that close response does not have
3395 memcpy(pbuf
, (char *)&rsp
->CreationTime
, sizeof(*pbuf
) - 4);
3398 atomic_dec(&tcon
->num_remote_opens
);
3400 SMB2_close_free(&rqst
);
3401 free_rsp_buf(resp_buftype
, rsp
);
3403 /* retry close in a worker thread if this one is interrupted */
3404 if (is_interrupt_error(rc
)) {
3407 tmp_rc
= smb2_handle_cancelled_close(tcon
, persistent_fid
,
3410 cifs_dbg(VFS
, "handle cancelled close fid 0x%llx returned error %d\n",
3411 persistent_fid
, tmp_rc
);
3417 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
3418 u64 persistent_fid
, u64 volatile_fid
)
3420 return __SMB2_close(xid
, tcon
, persistent_fid
, volatile_fid
, NULL
);
3424 smb2_validate_iov(unsigned int offset
, unsigned int buffer_length
,
3425 struct kvec
*iov
, unsigned int min_buf_size
)
3427 unsigned int smb_len
= iov
->iov_len
;
3428 char *end_of_smb
= smb_len
+ (char *)iov
->iov_base
;
3429 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
3430 char *end_of_buf
= begin_of_buf
+ buffer_length
;
3433 if (buffer_length
< min_buf_size
) {
3434 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
3435 buffer_length
, min_buf_size
);
3439 /* check if beyond RFC1001 maximum length */
3440 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
3441 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
3442 buffer_length
, smb_len
);
3446 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
3447 cifs_dbg(VFS
, "Invalid server response, bad offset to data\n");
3455 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
3456 * Caller must free buffer.
3459 smb2_validate_and_copy_iov(unsigned int offset
, unsigned int buffer_length
,
3460 struct kvec
*iov
, unsigned int minbufsize
,
3463 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
3469 rc
= smb2_validate_iov(offset
, buffer_length
, iov
, minbufsize
);
3473 memcpy(data
, begin_of_buf
, buffer_length
);
3479 SMB2_query_info_init(struct cifs_tcon
*tcon
, struct TCP_Server_Info
*server
,
3480 struct smb_rqst
*rqst
,
3481 u64 persistent_fid
, u64 volatile_fid
,
3482 u8 info_class
, u8 info_type
, u32 additional_info
,
3483 size_t output_len
, size_t input_len
, void *input
)
3485 struct smb2_query_info_req
*req
;
3486 struct kvec
*iov
= rqst
->rq_iov
;
3487 unsigned int total_len
;
3490 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, server
,
3491 (void **) &req
, &total_len
);
3495 req
->InfoType
= info_type
;
3496 req
->FileInfoClass
= info_class
;
3497 req
->PersistentFileId
= persistent_fid
;
3498 req
->VolatileFileId
= volatile_fid
;
3499 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
3501 req
->OutputBufferLength
= cpu_to_le32(output_len
);
3503 req
->InputBufferLength
= cpu_to_le32(input_len
);
3504 /* total_len for smb query request never close to le16 max */
3505 req
->InputBufferOffset
= cpu_to_le16(total_len
- 1);
3506 memcpy(req
->Buffer
, input
, input_len
);
3509 iov
[0].iov_base
= (char *)req
;
3511 iov
[0].iov_len
= total_len
- 1 + input_len
;
3516 SMB2_query_info_free(struct smb_rqst
*rqst
)
3518 if (rqst
&& rqst
->rq_iov
)
3519 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
3523 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3524 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
, u8 info_type
,
3525 u32 additional_info
, size_t output_len
, size_t min_len
, void **data
,
3528 struct smb_rqst rqst
;
3529 struct smb2_query_info_rsp
*rsp
= NULL
;
3531 struct kvec rsp_iov
;
3533 int resp_buftype
= CIFS_NO_BUFFER
;
3534 struct cifs_ses
*ses
= tcon
->ses
;
3535 struct TCP_Server_Info
*server
;
3537 bool allocated
= false;
3539 cifs_dbg(FYI
, "Query Info\n");
3543 server
= cifs_pick_channel(ses
);
3547 if (smb3_encryption_required(tcon
))
3548 flags
|= CIFS_TRANSFORM_REQ
;
3550 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3551 memset(&iov
, 0, sizeof(iov
));
3555 rc
= SMB2_query_info_init(tcon
, server
,
3556 &rqst
, persistent_fid
, volatile_fid
,
3557 info_class
, info_type
, additional_info
,
3558 output_len
, 0, NULL
);
3562 trace_smb3_query_info_enter(xid
, persistent_fid
, tcon
->tid
,
3563 ses
->Suid
, info_class
, (__u32
)info_type
);
3565 rc
= cifs_send_recv(xid
, ses
, server
,
3566 &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3567 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
3570 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
3571 trace_smb3_query_info_err(xid
, persistent_fid
, tcon
->tid
,
3572 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
3576 trace_smb3_query_info_done(xid
, persistent_fid
, tcon
->tid
,
3577 ses
->Suid
, info_class
, (__u32
)info_type
);
3580 *dlen
= le32_to_cpu(rsp
->OutputBufferLength
);
3582 *data
= kmalloc(*dlen
, GFP_KERNEL
);
3585 "Error %d allocating memory for acl\n",
3595 rc
= smb2_validate_and_copy_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
3596 le32_to_cpu(rsp
->OutputBufferLength
),
3597 &rsp_iov
, min_len
, *data
);
3598 if (rc
&& allocated
) {
3605 SMB2_query_info_free(&rqst
);
3606 free_rsp_buf(resp_buftype
, rsp
);
3610 int SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3611 u64 persistent_fid
, u64 volatile_fid
, struct smb2_file_all_info
*data
)
3613 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3614 FILE_ALL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
3615 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
3616 sizeof(struct smb2_file_all_info
), (void **)&data
,
3621 /* currently unused, as now we are doing compounding instead (see smb311_posix_query_path_info) */
3623 SMB311_posix_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3624 u64 persistent_fid
, u64 volatile_fid
, struct smb311_posix_qinfo
*data
, u32
*plen
)
3626 size_t output_len
= sizeof(struct smb311_posix_qinfo
*) +
3627 (sizeof(struct cifs_sid
) * 2) + (PATH_MAX
* 2);
3630 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3631 SMB_FIND_FILE_POSIX_INFO
, SMB2_O_INFO_FILE
, 0,
3632 output_len
, sizeof(struct smb311_posix_qinfo
), (void **)&data
, plen
);
3633 /* Note caller must free "data" (passed in above). It may be allocated in query_info call */
3638 SMB2_query_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
3639 u64 persistent_fid
, u64 volatile_fid
,
3640 void **data
, u32
*plen
, u32 extra_info
)
3642 __u32 additional_info
= OWNER_SECINFO
| GROUP_SECINFO
| DACL_SECINFO
|
3646 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3647 0, SMB2_O_INFO_SECURITY
, additional_info
,
3648 SMB2_MAX_BUFFER_SIZE
, MIN_SEC_DESC_LEN
, data
, plen
);
3652 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
3653 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
3655 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3656 FILE_INTERNAL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
3657 sizeof(struct smb2_file_internal_info
),
3658 sizeof(struct smb2_file_internal_info
),
3659 (void **)&uniqueid
, NULL
);
3663 * CHANGE_NOTIFY Request is sent to get notifications on changes to a directory
3664 * See MS-SMB2 2.2.35 and 2.2.36
3668 SMB2_notify_init(const unsigned int xid
, struct smb_rqst
*rqst
,
3669 struct cifs_tcon
*tcon
, struct TCP_Server_Info
*server
,
3670 u64 persistent_fid
, u64 volatile_fid
,
3671 u32 completion_filter
, bool watch_tree
)
3673 struct smb2_change_notify_req
*req
;
3674 struct kvec
*iov
= rqst
->rq_iov
;
3675 unsigned int total_len
;
3678 rc
= smb2_plain_req_init(SMB2_CHANGE_NOTIFY
, tcon
, server
,
3679 (void **) &req
, &total_len
);
3683 req
->PersistentFileId
= persistent_fid
;
3684 req
->VolatileFileId
= volatile_fid
;
3685 /* See note 354 of MS-SMB2, 64K max */
3686 req
->OutputBufferLength
=
3687 cpu_to_le32(SMB2_MAX_BUFFER_SIZE
- MAX_SMB2_HDR_SIZE
);
3688 req
->CompletionFilter
= cpu_to_le32(completion_filter
);
3690 req
->Flags
= cpu_to_le16(SMB2_WATCH_TREE
);
3694 iov
[0].iov_base
= (char *)req
;
3695 iov
[0].iov_len
= total_len
;
3701 SMB2_change_notify(const unsigned int xid
, struct cifs_tcon
*tcon
,
3702 u64 persistent_fid
, u64 volatile_fid
, bool watch_tree
,
3703 u32 completion_filter
)
3705 struct cifs_ses
*ses
= tcon
->ses
;
3706 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
3707 struct smb_rqst rqst
;
3709 struct kvec rsp_iov
= {NULL
, 0};
3710 int resp_buftype
= CIFS_NO_BUFFER
;
3714 cifs_dbg(FYI
, "change notify\n");
3715 if (!ses
|| !server
)
3718 if (smb3_encryption_required(tcon
))
3719 flags
|= CIFS_TRANSFORM_REQ
;
3721 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3722 memset(&iov
, 0, sizeof(iov
));
3726 rc
= SMB2_notify_init(xid
, &rqst
, tcon
, server
,
3727 persistent_fid
, volatile_fid
,
3728 completion_filter
, watch_tree
);
3732 trace_smb3_notify_enter(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
3733 (u8
)watch_tree
, completion_filter
);
3734 rc
= cifs_send_recv(xid
, ses
, server
,
3735 &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3738 cifs_stats_fail_inc(tcon
, SMB2_CHANGE_NOTIFY_HE
);
3739 trace_smb3_notify_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
3740 (u8
)watch_tree
, completion_filter
, rc
);
3742 trace_smb3_notify_done(xid
, persistent_fid
, tcon
->tid
,
3743 ses
->Suid
, (u8
)watch_tree
, completion_filter
);
3747 cifs_small_buf_release(rqst
.rq_iov
[0].iov_base
); /* request */
3748 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3755 * This is a no-op for now. We're not really interested in the reply, but
3756 * rather in the fact that the server sent one and that server->lstrp
3759 * FIXME: maybe we should consider checking that the reply matches request?
3762 smb2_echo_callback(struct mid_q_entry
*mid
)
3764 struct TCP_Server_Info
*server
= mid
->callback_data
;
3765 struct smb2_echo_rsp
*rsp
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
3766 struct cifs_credits credits
= { .value
= 0, .instance
= 0 };
3768 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
3769 || mid
->mid_state
== MID_RESPONSE_MALFORMED
) {
3770 credits
.value
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
3771 credits
.instance
= server
->reconnect_instance
;
3775 add_credits(server
, &credits
, CIFS_ECHO_OP
);
3778 void smb2_reconnect_server(struct work_struct
*work
)
3780 struct TCP_Server_Info
*server
= container_of(work
,
3781 struct TCP_Server_Info
, reconnect
.work
);
3782 struct TCP_Server_Info
*pserver
;
3783 struct cifs_ses
*ses
, *ses2
;
3784 struct cifs_tcon
*tcon
, *tcon2
;
3785 struct list_head tmp_list
, tmp_ses_list
;
3786 bool tcon_exist
= false, ses_exist
= false;
3787 bool tcon_selected
= false;
3789 bool resched
= false;
3791 /* If server is a channel, select the primary channel */
3792 pserver
= CIFS_SERVER_IS_CHAN(server
) ? server
->primary_server
: server
;
3794 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
3795 mutex_lock(&pserver
->reconnect_mutex
);
3797 INIT_LIST_HEAD(&tmp_list
);
3798 INIT_LIST_HEAD(&tmp_ses_list
);
3799 cifs_dbg(FYI
, "Reconnecting tcons and channels\n");
3801 spin_lock(&cifs_tcp_ses_lock
);
3802 list_for_each_entry(ses
, &pserver
->smb_ses_list
, smb_ses_list
) {
3804 tcon_selected
= false;
3806 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
3807 if (tcon
->need_reconnect
|| tcon
->need_reopen_files
) {
3809 list_add_tail(&tcon
->rlist
, &tmp_list
);
3810 tcon_selected
= tcon_exist
= true;
3814 * IPC has the same lifetime as its session and uses its
3817 if (ses
->tcon_ipc
&& ses
->tcon_ipc
->need_reconnect
) {
3818 list_add_tail(&ses
->tcon_ipc
->rlist
, &tmp_list
);
3819 tcon_selected
= tcon_exist
= true;
3823 * handle the case where channel needs to reconnect
3824 * binding session, but tcon is healthy (some other channel
3827 spin_lock(&ses
->chan_lock
);
3828 if (!tcon_selected
&& cifs_chan_needs_reconnect(ses
, server
)) {
3829 list_add_tail(&ses
->rlist
, &tmp_ses_list
);
3833 spin_unlock(&ses
->chan_lock
);
3836 * Get the reference to server struct to be sure that the last call of
3837 * cifs_put_tcon() in the loop below won't release the server pointer.
3839 if (tcon_exist
|| ses_exist
)
3840 server
->srv_count
++;
3842 spin_unlock(&cifs_tcp_ses_lock
);
3844 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
3845 rc
= smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
, server
);
3847 cifs_reopen_persistent_handles(tcon
);
3850 list_del_init(&tcon
->rlist
);
3852 cifs_put_smb_ses(tcon
->ses
);
3854 cifs_put_tcon(tcon
);
3860 /* allocate a dummy tcon struct used for reconnect */
3861 tcon
= kzalloc(sizeof(struct cifs_tcon
), GFP_KERNEL
);
3864 list_for_each_entry_safe(ses
, ses2
, &tmp_ses_list
, rlist
) {
3865 list_del_init(&ses
->rlist
);
3866 cifs_put_smb_ses(ses
);
3871 tcon
->status
= TID_GOOD
;
3872 tcon
->retry
= false;
3873 tcon
->need_reconnect
= false;
3875 /* now reconnect sessions for necessary channels */
3876 list_for_each_entry_safe(ses
, ses2
, &tmp_ses_list
, rlist
) {
3878 rc
= smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
, server
);
3881 list_del_init(&ses
->rlist
);
3882 cifs_put_smb_ses(ses
);
3887 cifs_dbg(FYI
, "Reconnecting tcons and channels finished\n");
3889 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 2 * HZ
);
3890 mutex_unlock(&pserver
->reconnect_mutex
);
3892 /* now we can safely release srv struct */
3893 if (tcon_exist
|| ses_exist
)
3894 cifs_put_tcp_session(server
, 1);
3898 SMB2_echo(struct TCP_Server_Info
*server
)
3900 struct smb2_echo_req
*req
;
3903 struct smb_rqst rqst
= { .rq_iov
= iov
,
3905 unsigned int total_len
;
3907 cifs_dbg(FYI
, "In echo request for conn_id %lld\n", server
->conn_id
);
3909 spin_lock(&server
->srv_lock
);
3910 if (server
->ops
->need_neg
&&
3911 server
->ops
->need_neg(server
)) {
3912 spin_unlock(&server
->srv_lock
);
3913 /* No need to send echo on newly established connections */
3914 mod_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
3917 spin_unlock(&server
->srv_lock
);
3919 rc
= smb2_plain_req_init(SMB2_ECHO
, NULL
, server
,
3920 (void **)&req
, &total_len
);
3924 req
->hdr
.CreditRequest
= cpu_to_le16(1);
3926 iov
[0].iov_len
= total_len
;
3927 iov
[0].iov_base
= (char *)req
;
3929 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, NULL
,
3930 server
, CIFS_ECHO_OP
, NULL
);
3932 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
3934 cifs_small_buf_release(req
);
3939 SMB2_flush_free(struct smb_rqst
*rqst
)
3941 if (rqst
&& rqst
->rq_iov
)
3942 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
3946 SMB2_flush_init(const unsigned int xid
, struct smb_rqst
*rqst
,
3947 struct cifs_tcon
*tcon
, struct TCP_Server_Info
*server
,
3948 u64 persistent_fid
, u64 volatile_fid
)
3950 struct smb2_flush_req
*req
;
3951 struct kvec
*iov
= rqst
->rq_iov
;
3952 unsigned int total_len
;
3955 rc
= smb2_plain_req_init(SMB2_FLUSH
, tcon
, server
,
3956 (void **) &req
, &total_len
);
3960 req
->PersistentFileId
= persistent_fid
;
3961 req
->VolatileFileId
= volatile_fid
;
3963 iov
[0].iov_base
= (char *)req
;
3964 iov
[0].iov_len
= total_len
;
3970 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3973 struct cifs_ses
*ses
= tcon
->ses
;
3974 struct smb_rqst rqst
;
3976 struct kvec rsp_iov
= {NULL
, 0};
3977 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
3978 int resp_buftype
= CIFS_NO_BUFFER
;
3982 cifs_dbg(FYI
, "flush\n");
3983 if (!ses
|| !(ses
->server
))
3986 if (smb3_encryption_required(tcon
))
3987 flags
|= CIFS_TRANSFORM_REQ
;
3989 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3990 memset(&iov
, 0, sizeof(iov
));
3994 rc
= SMB2_flush_init(xid
, &rqst
, tcon
, server
,
3995 persistent_fid
, volatile_fid
);
3999 trace_smb3_flush_enter(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
);
4000 rc
= cifs_send_recv(xid
, ses
, server
,
4001 &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4004 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
4005 trace_smb3_flush_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
4008 trace_smb3_flush_done(xid
, persistent_fid
, tcon
->tid
,
4012 SMB2_flush_free(&rqst
);
4013 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4018 * To form a chain of read requests, any read requests after the first should
4019 * have the end_of_chain boolean set to true.
4022 smb2_new_read_req(void **buf
, unsigned int *total_len
,
4023 struct cifs_io_parms
*io_parms
, struct cifs_readdata
*rdata
,
4024 unsigned int remaining_bytes
, int request_type
)
4027 struct smb2_read_req
*req
= NULL
;
4028 struct smb2_hdr
*shdr
;
4029 struct TCP_Server_Info
*server
= io_parms
->server
;
4031 rc
= smb2_plain_req_init(SMB2_READ
, io_parms
->tcon
, server
,
4032 (void **) &req
, total_len
);
4037 return -ECONNABORTED
;
4040 shdr
->Id
.SyncId
.ProcessId
= cpu_to_le32(io_parms
->pid
);
4042 req
->PersistentFileId
= io_parms
->persistent_fid
;
4043 req
->VolatileFileId
= io_parms
->volatile_fid
;
4044 req
->ReadChannelInfoOffset
= 0; /* reserved */
4045 req
->ReadChannelInfoLength
= 0; /* reserved */
4046 req
->Channel
= 0; /* reserved */
4047 req
->MinimumCount
= 0;
4048 req
->Length
= cpu_to_le32(io_parms
->length
);
4049 req
->Offset
= cpu_to_le64(io_parms
->offset
);
4051 trace_smb3_read_enter(0 /* xid */,
4052 io_parms
->persistent_fid
,
4053 io_parms
->tcon
->tid
, io_parms
->tcon
->ses
->Suid
,
4054 io_parms
->offset
, io_parms
->length
);
4055 #ifdef CONFIG_CIFS_SMB_DIRECT
4057 * If we want to do a RDMA write, fill in and append
4058 * smbd_buffer_descriptor_v1 to the end of read request
4060 if (server
->rdma
&& rdata
&& !server
->sign
&&
4061 rdata
->bytes
>= server
->smbd_conn
->rdma_readwrite_threshold
) {
4063 struct smbd_buffer_descriptor_v1
*v1
;
4064 bool need_invalidate
= server
->dialect
== SMB30_PROT_ID
;
4066 rdata
->mr
= smbd_register_mr(
4067 server
->smbd_conn
, rdata
->pages
,
4068 rdata
->nr_pages
, rdata
->page_offset
,
4069 rdata
->tailsz
, true, need_invalidate
);
4073 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
4074 if (need_invalidate
)
4075 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
4076 req
->ReadChannelInfoOffset
=
4077 cpu_to_le16(offsetof(struct smb2_read_req
, Buffer
));
4078 req
->ReadChannelInfoLength
=
4079 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
4080 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
4081 v1
->offset
= cpu_to_le64(rdata
->mr
->mr
->iova
);
4082 v1
->token
= cpu_to_le32(rdata
->mr
->mr
->rkey
);
4083 v1
->length
= cpu_to_le32(rdata
->mr
->mr
->length
);
4085 *total_len
+= sizeof(*v1
) - 1;
4088 if (request_type
& CHAINED_REQUEST
) {
4089 if (!(request_type
& END_OF_CHAIN
)) {
4090 /* next 8-byte aligned request */
4091 *total_len
= DIV_ROUND_UP(*total_len
, 8) * 8;
4092 shdr
->NextCommand
= cpu_to_le32(*total_len
);
4093 } else /* END_OF_CHAIN */
4094 shdr
->NextCommand
= 0;
4095 if (request_type
& RELATED_REQUEST
) {
4096 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
4098 * Related requests use info from previous read request
4101 shdr
->SessionId
= cpu_to_le64(0xFFFFFFFFFFFFFFFF);
4102 shdr
->Id
.SyncId
.TreeId
= cpu_to_le32(0xFFFFFFFF);
4103 req
->PersistentFileId
= (u64
)-1;
4104 req
->VolatileFileId
= (u64
)-1;
4107 if (remaining_bytes
> io_parms
->length
)
4108 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
4110 req
->RemainingBytes
= 0;
4117 smb2_readv_callback(struct mid_q_entry
*mid
)
4119 struct cifs_readdata
*rdata
= mid
->callback_data
;
4120 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
4121 struct TCP_Server_Info
*server
= rdata
->server
;
4122 struct smb2_hdr
*shdr
=
4123 (struct smb2_hdr
*)rdata
->iov
[0].iov_base
;
4124 struct cifs_credits credits
= { .value
= 0, .instance
= 0 };
4125 struct smb_rqst rqst
= { .rq_iov
= &rdata
->iov
[1],
4127 .rq_pages
= rdata
->pages
,
4128 .rq_offset
= rdata
->page_offset
,
4129 .rq_npages
= rdata
->nr_pages
,
4130 .rq_pagesz
= rdata
->pagesz
,
4131 .rq_tailsz
= rdata
->tailsz
};
4133 WARN_ONCE(rdata
->server
!= mid
->server
,
4134 "rdata server %p != mid server %p",
4135 rdata
->server
, mid
->server
);
4137 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
4138 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
4141 switch (mid
->mid_state
) {
4142 case MID_RESPONSE_RECEIVED
:
4143 credits
.value
= le16_to_cpu(shdr
->CreditRequest
);
4144 credits
.instance
= server
->reconnect_instance
;
4145 /* result already set, check signature */
4146 if (server
->sign
&& !mid
->decrypted
) {
4149 rc
= smb2_verify_signature(&rqst
, server
);
4151 cifs_tcon_dbg(VFS
, "SMB signature verification returned error = %d\n",
4154 /* FIXME: should this be counted toward the initiating task? */
4155 task_io_account_read(rdata
->got_bytes
);
4156 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
4158 case MID_REQUEST_SUBMITTED
:
4159 case MID_RETRY_NEEDED
:
4160 rdata
->result
= -EAGAIN
;
4161 if (server
->sign
&& rdata
->got_bytes
)
4162 /* reset bytes number since we can not check a sign */
4163 rdata
->got_bytes
= 0;
4164 /* FIXME: should this be counted toward the initiating task? */
4165 task_io_account_read(rdata
->got_bytes
);
4166 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
4168 case MID_RESPONSE_MALFORMED
:
4169 credits
.value
= le16_to_cpu(shdr
->CreditRequest
);
4170 credits
.instance
= server
->reconnect_instance
;
4173 rdata
->result
= -EIO
;
4175 #ifdef CONFIG_CIFS_SMB_DIRECT
4177 * If this rdata has a memmory registered, the MR can be freed
4178 * MR needs to be freed as soon as I/O finishes to prevent deadlock
4179 * because they have limited number and are used for future I/Os
4182 smbd_deregister_mr(rdata
->mr
);
4186 if (rdata
->result
&& rdata
->result
!= -ENODATA
) {
4187 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
4188 trace_smb3_read_err(0 /* xid */,
4189 rdata
->cfile
->fid
.persistent_fid
,
4190 tcon
->tid
, tcon
->ses
->Suid
, rdata
->offset
,
4191 rdata
->bytes
, rdata
->result
);
4193 trace_smb3_read_done(0 /* xid */,
4194 rdata
->cfile
->fid
.persistent_fid
,
4195 tcon
->tid
, tcon
->ses
->Suid
,
4196 rdata
->offset
, rdata
->got_bytes
);
4198 queue_work(cifsiod_wq
, &rdata
->work
);
4200 add_credits(server
, &credits
, 0);
4203 /* smb2_async_readv - send an async read, and set up mid to handle result */
4205 smb2_async_readv(struct cifs_readdata
*rdata
)
4209 struct smb2_hdr
*shdr
;
4210 struct cifs_io_parms io_parms
;
4211 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
4213 struct TCP_Server_Info
*server
;
4214 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
4215 unsigned int total_len
;
4217 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
4218 __func__
, rdata
->offset
, rdata
->bytes
);
4221 rdata
->server
= cifs_pick_channel(tcon
->ses
);
4223 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
4224 io_parms
.server
= server
= rdata
->server
;
4225 io_parms
.offset
= rdata
->offset
;
4226 io_parms
.length
= rdata
->bytes
;
4227 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
4228 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
4229 io_parms
.pid
= rdata
->pid
;
4231 rc
= smb2_new_read_req(
4232 (void **) &buf
, &total_len
, &io_parms
, rdata
, 0, 0);
4236 if (smb3_encryption_required(io_parms
.tcon
))
4237 flags
|= CIFS_TRANSFORM_REQ
;
4239 rdata
->iov
[0].iov_base
= buf
;
4240 rdata
->iov
[0].iov_len
= total_len
;
4242 shdr
= (struct smb2_hdr
*)buf
;
4244 if (rdata
->credits
.value
> 0) {
4245 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
4246 SMB2_MAX_BUFFER_SIZE
));
4247 shdr
->CreditRequest
= cpu_to_le16(le16_to_cpu(shdr
->CreditCharge
) + 8);
4249 rc
= adjust_credits(server
, &rdata
->credits
, rdata
->bytes
);
4251 goto async_readv_out
;
4253 flags
|= CIFS_HAS_CREDITS
;
4256 kref_get(&rdata
->refcount
);
4257 rc
= cifs_call_async(server
, &rqst
,
4258 cifs_readv_receive
, smb2_readv_callback
,
4259 smb3_handle_read_data
, rdata
, flags
,
4262 kref_put(&rdata
->refcount
, cifs_readdata_release
);
4263 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
4264 trace_smb3_read_err(0 /* xid */, io_parms
.persistent_fid
,
4266 io_parms
.tcon
->ses
->Suid
,
4267 io_parms
.offset
, io_parms
.length
, rc
);
4271 cifs_small_buf_release(buf
);
4276 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
4277 unsigned int *nbytes
, char **buf
, int *buf_type
)
4279 struct smb_rqst rqst
;
4280 int resp_buftype
, rc
;
4281 struct smb2_read_req
*req
= NULL
;
4282 struct smb2_read_rsp
*rsp
= NULL
;
4284 struct kvec rsp_iov
;
4285 unsigned int total_len
;
4286 int flags
= CIFS_LOG_ERROR
;
4287 struct cifs_ses
*ses
= io_parms
->tcon
->ses
;
4289 if (!io_parms
->server
)
4290 io_parms
->server
= cifs_pick_channel(io_parms
->tcon
->ses
);
4293 rc
= smb2_new_read_req((void **)&req
, &total_len
, io_parms
, NULL
, 0, 0);
4297 if (smb3_encryption_required(io_parms
->tcon
))
4298 flags
|= CIFS_TRANSFORM_REQ
;
4300 iov
[0].iov_base
= (char *)req
;
4301 iov
[0].iov_len
= total_len
;
4303 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4307 rc
= cifs_send_recv(xid
, ses
, io_parms
->server
,
4308 &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4309 rsp
= (struct smb2_read_rsp
*)rsp_iov
.iov_base
;
4312 if (rc
!= -ENODATA
) {
4313 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
4314 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
4315 trace_smb3_read_err(xid
,
4316 req
->PersistentFileId
,
4317 io_parms
->tcon
->tid
, ses
->Suid
,
4318 io_parms
->offset
, io_parms
->length
,
4321 trace_smb3_read_done(xid
, req
->PersistentFileId
, io_parms
->tcon
->tid
,
4322 ses
->Suid
, io_parms
->offset
, 0);
4323 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4324 cifs_small_buf_release(req
);
4325 return rc
== -ENODATA
? 0 : rc
;
4327 trace_smb3_read_done(xid
,
4328 req
->PersistentFileId
,
4329 io_parms
->tcon
->tid
, ses
->Suid
,
4330 io_parms
->offset
, io_parms
->length
);
4332 cifs_small_buf_release(req
);
4334 *nbytes
= le32_to_cpu(rsp
->DataLength
);
4335 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
4336 (*nbytes
> io_parms
->length
)) {
4337 cifs_dbg(FYI
, "bad length %d for count %d\n",
4338 *nbytes
, io_parms
->length
);
4344 memcpy(*buf
, (char *)rsp
+ rsp
->DataOffset
, *nbytes
);
4345 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4346 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
4347 *buf
= rsp_iov
.iov_base
;
4348 if (resp_buftype
== CIFS_SMALL_BUFFER
)
4349 *buf_type
= CIFS_SMALL_BUFFER
;
4350 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
4351 *buf_type
= CIFS_LARGE_BUFFER
;
4357 * Check the mid_state and signature on received buffer (if any), and queue the
4358 * workqueue completion task.
4361 smb2_writev_callback(struct mid_q_entry
*mid
)
4363 struct cifs_writedata
*wdata
= mid
->callback_data
;
4364 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
4365 struct TCP_Server_Info
*server
= wdata
->server
;
4366 unsigned int written
;
4367 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
4368 struct cifs_credits credits
= { .value
= 0, .instance
= 0 };
4370 WARN_ONCE(wdata
->server
!= mid
->server
,
4371 "wdata server %p != mid server %p",
4372 wdata
->server
, mid
->server
);
4374 switch (mid
->mid_state
) {
4375 case MID_RESPONSE_RECEIVED
:
4376 credits
.value
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
4377 credits
.instance
= server
->reconnect_instance
;
4378 wdata
->result
= smb2_check_receive(mid
, server
, 0);
4379 if (wdata
->result
!= 0)
4382 written
= le32_to_cpu(rsp
->DataLength
);
4384 * Mask off high 16 bits when bytes written as returned
4385 * by the server is greater than bytes requested by the
4386 * client. OS/2 servers are known to set incorrect
4389 if (written
> wdata
->bytes
)
4392 if (written
< wdata
->bytes
)
4393 wdata
->result
= -ENOSPC
;
4395 wdata
->bytes
= written
;
4397 case MID_REQUEST_SUBMITTED
:
4398 case MID_RETRY_NEEDED
:
4399 wdata
->result
= -EAGAIN
;
4401 case MID_RESPONSE_MALFORMED
:
4402 credits
.value
= le16_to_cpu(rsp
->hdr
.CreditRequest
);
4403 credits
.instance
= server
->reconnect_instance
;
4406 wdata
->result
= -EIO
;
4409 #ifdef CONFIG_CIFS_SMB_DIRECT
4411 * If this wdata has a memory registered, the MR can be freed
4412 * The number of MRs available is limited, it's important to recover
4413 * used MR as soon as I/O is finished. Hold MR longer in the later
4414 * I/O process can possibly result in I/O deadlock due to lack of MR
4415 * to send request on I/O retry
4418 smbd_deregister_mr(wdata
->mr
);
4422 if (wdata
->result
) {
4423 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
4424 trace_smb3_write_err(0 /* no xid */,
4425 wdata
->cfile
->fid
.persistent_fid
,
4426 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
4427 wdata
->bytes
, wdata
->result
);
4428 if (wdata
->result
== -ENOSPC
)
4429 pr_warn_once("Out of space writing to %s\n",
4432 trace_smb3_write_done(0 /* no xid */,
4433 wdata
->cfile
->fid
.persistent_fid
,
4434 tcon
->tid
, tcon
->ses
->Suid
,
4435 wdata
->offset
, wdata
->bytes
);
4437 queue_work(cifsiod_wq
, &wdata
->work
);
4439 add_credits(server
, &credits
, 0);
4442 /* smb2_async_writev - send an async write, and set up mid to handle result */
4444 smb2_async_writev(struct cifs_writedata
*wdata
,
4445 void (*release
)(struct kref
*kref
))
4447 int rc
= -EACCES
, flags
= 0;
4448 struct smb2_write_req
*req
= NULL
;
4449 struct smb2_hdr
*shdr
;
4450 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
4451 struct TCP_Server_Info
*server
= wdata
->server
;
4453 struct smb_rqst rqst
= { };
4454 unsigned int total_len
;
4457 server
= wdata
->server
= cifs_pick_channel(tcon
->ses
);
4459 rc
= smb2_plain_req_init(SMB2_WRITE
, tcon
, server
,
4460 (void **) &req
, &total_len
);
4464 if (smb3_encryption_required(tcon
))
4465 flags
|= CIFS_TRANSFORM_REQ
;
4467 shdr
= (struct smb2_hdr
*)req
;
4468 shdr
->Id
.SyncId
.ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
4470 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
4471 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
4472 req
->WriteChannelInfoOffset
= 0;
4473 req
->WriteChannelInfoLength
= 0;
4475 req
->Offset
= cpu_to_le64(wdata
->offset
);
4476 req
->DataOffset
= cpu_to_le16(
4477 offsetof(struct smb2_write_req
, Buffer
));
4478 req
->RemainingBytes
= 0;
4480 trace_smb3_write_enter(0 /* xid */, wdata
->cfile
->fid
.persistent_fid
,
4481 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
, wdata
->bytes
);
4482 #ifdef CONFIG_CIFS_SMB_DIRECT
4484 * If we want to do a server RDMA read, fill in and append
4485 * smbd_buffer_descriptor_v1 to the end of write request
4487 if (server
->rdma
&& !server
->sign
&& wdata
->bytes
>=
4488 server
->smbd_conn
->rdma_readwrite_threshold
) {
4490 struct smbd_buffer_descriptor_v1
*v1
;
4491 bool need_invalidate
= server
->dialect
== SMB30_PROT_ID
;
4493 wdata
->mr
= smbd_register_mr(
4494 server
->smbd_conn
, wdata
->pages
,
4495 wdata
->nr_pages
, wdata
->page_offset
,
4496 wdata
->tailsz
, false, need_invalidate
);
4499 goto async_writev_out
;
4502 req
->DataOffset
= 0;
4503 if (wdata
->nr_pages
> 1)
4504 req
->RemainingBytes
=
4506 (wdata
->nr_pages
- 1) * wdata
->pagesz
-
4507 wdata
->page_offset
+ wdata
->tailsz
4510 req
->RemainingBytes
= cpu_to_le32(wdata
->tailsz
);
4511 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
4512 if (need_invalidate
)
4513 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
4514 req
->WriteChannelInfoOffset
=
4515 cpu_to_le16(offsetof(struct smb2_write_req
, Buffer
));
4516 req
->WriteChannelInfoLength
=
4517 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
4518 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
4519 v1
->offset
= cpu_to_le64(wdata
->mr
->mr
->iova
);
4520 v1
->token
= cpu_to_le32(wdata
->mr
->mr
->rkey
);
4521 v1
->length
= cpu_to_le32(wdata
->mr
->mr
->length
);
4524 iov
[0].iov_len
= total_len
- 1;
4525 iov
[0].iov_base
= (char *)req
;
4529 rqst
.rq_pages
= wdata
->pages
;
4530 rqst
.rq_offset
= wdata
->page_offset
;
4531 rqst
.rq_npages
= wdata
->nr_pages
;
4532 rqst
.rq_pagesz
= wdata
->pagesz
;
4533 rqst
.rq_tailsz
= wdata
->tailsz
;
4534 #ifdef CONFIG_CIFS_SMB_DIRECT
4536 iov
[0].iov_len
+= sizeof(struct smbd_buffer_descriptor_v1
);
4540 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
4541 wdata
->offset
, wdata
->bytes
);
4543 #ifdef CONFIG_CIFS_SMB_DIRECT
4544 /* For RDMA read, I/O size is in RemainingBytes not in Length */
4546 req
->Length
= cpu_to_le32(wdata
->bytes
);
4548 req
->Length
= cpu_to_le32(wdata
->bytes
);
4551 if (wdata
->credits
.value
> 0) {
4552 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
4553 SMB2_MAX_BUFFER_SIZE
));
4554 shdr
->CreditRequest
= cpu_to_le16(le16_to_cpu(shdr
->CreditCharge
) + 8);
4556 rc
= adjust_credits(server
, &wdata
->credits
, wdata
->bytes
);
4558 goto async_writev_out
;
4560 flags
|= CIFS_HAS_CREDITS
;
4563 kref_get(&wdata
->refcount
);
4564 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, NULL
,
4565 wdata
, flags
, &wdata
->credits
);
4568 trace_smb3_write_err(0 /* no xid */,
4569 req
->PersistentFileId
,
4570 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
4572 kref_put(&wdata
->refcount
, release
);
4573 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
4577 cifs_small_buf_release(req
);
4582 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
4583 * The length field from io_parms must be at least 1 and indicates a number of
4584 * elements with data to write that begins with position 1 in iov array. All
4585 * data length is specified by count.
4588 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
4589 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
4591 struct smb_rqst rqst
;
4593 struct smb2_write_req
*req
= NULL
;
4594 struct smb2_write_rsp
*rsp
= NULL
;
4596 struct kvec rsp_iov
;
4598 unsigned int total_len
;
4599 struct TCP_Server_Info
*server
;
4606 if (!io_parms
->server
)
4607 io_parms
->server
= cifs_pick_channel(io_parms
->tcon
->ses
);
4608 server
= io_parms
->server
;
4610 return -ECONNABORTED
;
4612 rc
= smb2_plain_req_init(SMB2_WRITE
, io_parms
->tcon
, server
,
4613 (void **) &req
, &total_len
);
4617 if (smb3_encryption_required(io_parms
->tcon
))
4618 flags
|= CIFS_TRANSFORM_REQ
;
4620 req
->hdr
.Id
.SyncId
.ProcessId
= cpu_to_le32(io_parms
->pid
);
4622 req
->PersistentFileId
= io_parms
->persistent_fid
;
4623 req
->VolatileFileId
= io_parms
->volatile_fid
;
4624 req
->WriteChannelInfoOffset
= 0;
4625 req
->WriteChannelInfoLength
= 0;
4627 req
->Length
= cpu_to_le32(io_parms
->length
);
4628 req
->Offset
= cpu_to_le64(io_parms
->offset
);
4629 req
->DataOffset
= cpu_to_le16(
4630 offsetof(struct smb2_write_req
, Buffer
));
4631 req
->RemainingBytes
= 0;
4633 trace_smb3_write_enter(xid
, io_parms
->persistent_fid
,
4634 io_parms
->tcon
->tid
, io_parms
->tcon
->ses
->Suid
,
4635 io_parms
->offset
, io_parms
->length
);
4637 iov
[0].iov_base
= (char *)req
;
4639 iov
[0].iov_len
= total_len
- 1;
4641 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4643 rqst
.rq_nvec
= n_vec
+ 1;
4645 rc
= cifs_send_recv(xid
, io_parms
->tcon
->ses
, server
,
4647 &resp_buftype
, flags
, &rsp_iov
);
4648 rsp
= (struct smb2_write_rsp
*)rsp_iov
.iov_base
;
4651 trace_smb3_write_err(xid
,
4652 req
->PersistentFileId
,
4653 io_parms
->tcon
->tid
,
4654 io_parms
->tcon
->ses
->Suid
,
4655 io_parms
->offset
, io_parms
->length
, rc
);
4656 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
4657 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
4659 *nbytes
= le32_to_cpu(rsp
->DataLength
);
4660 trace_smb3_write_done(xid
,
4661 req
->PersistentFileId
,
4662 io_parms
->tcon
->tid
,
4663 io_parms
->tcon
->ses
->Suid
,
4664 io_parms
->offset
, *nbytes
);
4667 cifs_small_buf_release(req
);
4668 free_rsp_buf(resp_buftype
, rsp
);
4672 int posix_info_sid_size(const void *beg
, const void *end
)
4680 subauth
= *(u8
*)(beg
+1);
4681 if (subauth
< 1 || subauth
> 15)
4684 total
= 1 + 1 + 6 + 4*subauth
;
4685 if (beg
+ total
> end
)
4691 int posix_info_parse(const void *beg
, const void *end
,
4692 struct smb2_posix_info_parsed
*out
)
4696 int owner_len
, group_len
;
4698 const void *owner_sid
;
4699 const void *group_sid
;
4702 /* if no end bound given, assume payload to be correct */
4704 const struct smb2_posix_info
*p
= beg
;
4706 end
= beg
+ le32_to_cpu(p
->NextEntryOffset
);
4707 /* last element will have a 0 offset, pick a sensible bound */
4712 /* check base buf */
4713 if (beg
+ sizeof(struct smb2_posix_info
) > end
)
4715 total_len
= sizeof(struct smb2_posix_info
);
4717 /* check owner sid */
4718 owner_sid
= beg
+ total_len
;
4719 owner_len
= posix_info_sid_size(owner_sid
, end
);
4722 total_len
+= owner_len
;
4724 /* check group sid */
4725 group_sid
= beg
+ total_len
;
4726 group_len
= posix_info_sid_size(group_sid
, end
);
4729 total_len
+= group_len
;
4731 /* check name len */
4732 if (beg
+ total_len
+ 4 > end
)
4734 name_len
= le32_to_cpu(*(__le32
*)(beg
+ total_len
));
4735 if (name_len
< 1 || name_len
> 0xFFFF)
4740 name
= beg
+ total_len
;
4741 if (name
+ name_len
> end
)
4743 total_len
+= name_len
;
4747 out
->size
= total_len
;
4748 out
->name_len
= name_len
;
4750 memcpy(&out
->owner
, owner_sid
, owner_len
);
4751 memcpy(&out
->group
, group_sid
, group_len
);
4756 static int posix_info_extra_size(const void *beg
, const void *end
)
4758 int len
= posix_info_parse(beg
, end
, NULL
);
4762 return len
- sizeof(struct smb2_posix_info
);
4766 num_entries(int infotype
, char *bufstart
, char *end_of_buf
, char **lastentry
,
4770 unsigned int entrycount
= 0;
4771 unsigned int next_offset
= 0;
4773 FILE_DIRECTORY_INFO
*dir_info
;
4775 if (bufstart
== NULL
)
4778 entryptr
= bufstart
;
4781 if (entryptr
+ next_offset
< entryptr
||
4782 entryptr
+ next_offset
> end_of_buf
||
4783 entryptr
+ next_offset
+ size
> end_of_buf
) {
4784 cifs_dbg(VFS
, "malformed search entry would overflow\n");
4788 entryptr
= entryptr
+ next_offset
;
4789 dir_info
= (FILE_DIRECTORY_INFO
*)entryptr
;
4791 if (infotype
== SMB_FIND_FILE_POSIX_INFO
)
4792 len
= posix_info_extra_size(entryptr
, end_of_buf
);
4794 len
= le32_to_cpu(dir_info
->FileNameLength
);
4797 entryptr
+ len
< entryptr
||
4798 entryptr
+ len
> end_of_buf
||
4799 entryptr
+ len
+ size
> end_of_buf
) {
4800 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
4805 *lastentry
= entryptr
;
4808 next_offset
= le32_to_cpu(dir_info
->NextEntryOffset
);
4819 int SMB2_query_directory_init(const unsigned int xid
,
4820 struct cifs_tcon
*tcon
,
4821 struct TCP_Server_Info
*server
,
4822 struct smb_rqst
*rqst
,
4823 u64 persistent_fid
, u64 volatile_fid
,
4824 int index
, int info_level
)
4826 struct smb2_query_directory_req
*req
;
4827 unsigned char *bufptr
;
4828 __le16 asteriks
= cpu_to_le16('*');
4829 unsigned int output_size
= CIFSMaxBufSize
-
4830 MAX_SMB2_CREATE_RESPONSE_SIZE
-
4831 MAX_SMB2_CLOSE_RESPONSE_SIZE
;
4832 unsigned int total_len
;
4833 struct kvec
*iov
= rqst
->rq_iov
;
4836 rc
= smb2_plain_req_init(SMB2_QUERY_DIRECTORY
, tcon
, server
,
4837 (void **) &req
, &total_len
);
4841 switch (info_level
) {
4842 case SMB_FIND_FILE_DIRECTORY_INFO
:
4843 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
4845 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
4846 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
4848 case SMB_FIND_FILE_POSIX_INFO
:
4849 req
->FileInformationClass
= SMB_FIND_FILE_POSIX_INFO
;
4852 cifs_tcon_dbg(VFS
, "info level %u isn't supported\n",
4857 req
->FileIndex
= cpu_to_le32(index
);
4858 req
->PersistentFileId
= persistent_fid
;
4859 req
->VolatileFileId
= volatile_fid
;
4862 bufptr
= req
->Buffer
;
4863 memcpy(bufptr
, &asteriks
, len
);
4865 req
->FileNameOffset
=
4866 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1);
4867 req
->FileNameLength
= cpu_to_le16(len
);
4869 * BB could be 30 bytes or so longer if we used SMB2 specific
4870 * buffer lengths, but this is safe and close enough.
4872 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
4873 output_size
= min_t(unsigned int, output_size
, 2 << 15);
4874 req
->OutputBufferLength
= cpu_to_le32(output_size
);
4876 iov
[0].iov_base
= (char *)req
;
4878 iov
[0].iov_len
= total_len
- 1;
4880 iov
[1].iov_base
= (char *)(req
->Buffer
);
4881 iov
[1].iov_len
= len
;
4883 trace_smb3_query_dir_enter(xid
, persistent_fid
, tcon
->tid
,
4884 tcon
->ses
->Suid
, index
, output_size
);
4889 void SMB2_query_directory_free(struct smb_rqst
*rqst
)
4891 if (rqst
&& rqst
->rq_iov
) {
4892 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
4897 smb2_parse_query_directory(struct cifs_tcon
*tcon
,
4898 struct kvec
*rsp_iov
,
4900 struct cifs_search_info
*srch_inf
)
4902 struct smb2_query_directory_rsp
*rsp
;
4903 size_t info_buf_size
;
4907 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
->iov_base
;
4909 switch (srch_inf
->info_level
) {
4910 case SMB_FIND_FILE_DIRECTORY_INFO
:
4911 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
4913 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
4914 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
4916 case SMB_FIND_FILE_POSIX_INFO
:
4917 /* note that posix payload are variable size */
4918 info_buf_size
= sizeof(struct smb2_posix_info
);
4921 cifs_tcon_dbg(VFS
, "info level %u isn't supported\n",
4922 srch_inf
->info_level
);
4926 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
4927 le32_to_cpu(rsp
->OutputBufferLength
), rsp_iov
,
4930 cifs_tcon_dbg(VFS
, "bad info payload");
4934 srch_inf
->unicode
= true;
4936 if (srch_inf
->ntwrk_buf_start
) {
4937 if (srch_inf
->smallBuf
)
4938 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
4940 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
4942 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
4943 srch_inf
->srch_entries_start
= srch_inf
->last_entry
=
4944 (char *)rsp
+ le16_to_cpu(rsp
->OutputBufferOffset
);
4945 end_of_smb
= rsp_iov
->iov_len
+ (char *)rsp
;
4947 srch_inf
->entries_in_buffer
= num_entries(
4948 srch_inf
->info_level
,
4949 srch_inf
->srch_entries_start
,
4951 &srch_inf
->last_entry
,
4954 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
4955 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
4956 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
4957 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
4958 if (resp_buftype
== CIFS_LARGE_BUFFER
)
4959 srch_inf
->smallBuf
= false;
4960 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
4961 srch_inf
->smallBuf
= true;
4963 cifs_tcon_dbg(VFS
, "Invalid search buffer type\n");
4969 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
4970 u64 persistent_fid
, u64 volatile_fid
, int index
,
4971 struct cifs_search_info
*srch_inf
)
4973 struct smb_rqst rqst
;
4974 struct kvec iov
[SMB2_QUERY_DIRECTORY_IOV_SIZE
];
4975 struct smb2_query_directory_rsp
*rsp
= NULL
;
4976 int resp_buftype
= CIFS_NO_BUFFER
;
4977 struct kvec rsp_iov
;
4979 struct cifs_ses
*ses
= tcon
->ses
;
4980 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
4983 if (!ses
|| !(ses
->server
))
4986 if (smb3_encryption_required(tcon
))
4987 flags
|= CIFS_TRANSFORM_REQ
;
4989 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4990 memset(&iov
, 0, sizeof(iov
));
4992 rqst
.rq_nvec
= SMB2_QUERY_DIRECTORY_IOV_SIZE
;
4994 rc
= SMB2_query_directory_init(xid
, tcon
, server
,
4995 &rqst
, persistent_fid
,
4996 volatile_fid
, index
,
4997 srch_inf
->info_level
);
5001 rc
= cifs_send_recv(xid
, ses
, server
,
5002 &rqst
, &resp_buftype
, flags
, &rsp_iov
);
5003 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
.iov_base
;
5006 if (rc
== -ENODATA
&&
5007 rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
) {
5008 trace_smb3_query_dir_done(xid
, persistent_fid
,
5009 tcon
->tid
, tcon
->ses
->Suid
, index
, 0);
5010 srch_inf
->endOfSearch
= true;
5013 trace_smb3_query_dir_err(xid
, persistent_fid
, tcon
->tid
,
5014 tcon
->ses
->Suid
, index
, 0, rc
);
5015 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
5020 rc
= smb2_parse_query_directory(tcon
, &rsp_iov
, resp_buftype
,
5023 trace_smb3_query_dir_err(xid
, persistent_fid
, tcon
->tid
,
5024 tcon
->ses
->Suid
, index
, 0, rc
);
5027 resp_buftype
= CIFS_NO_BUFFER
;
5029 trace_smb3_query_dir_done(xid
, persistent_fid
, tcon
->tid
,
5030 tcon
->ses
->Suid
, index
, srch_inf
->entries_in_buffer
);
5033 SMB2_query_directory_free(&rqst
);
5034 free_rsp_buf(resp_buftype
, rsp
);
5039 SMB2_set_info_init(struct cifs_tcon
*tcon
, struct TCP_Server_Info
*server
,
5040 struct smb_rqst
*rqst
,
5041 u64 persistent_fid
, u64 volatile_fid
, u32 pid
,
5042 u8 info_class
, u8 info_type
, u32 additional_info
,
5043 void **data
, unsigned int *size
)
5045 struct smb2_set_info_req
*req
;
5046 struct kvec
*iov
= rqst
->rq_iov
;
5047 unsigned int i
, total_len
;
5050 rc
= smb2_plain_req_init(SMB2_SET_INFO
, tcon
, server
,
5051 (void **) &req
, &total_len
);
5055 req
->hdr
.Id
.SyncId
.ProcessId
= cpu_to_le32(pid
);
5056 req
->InfoType
= info_type
;
5057 req
->FileInfoClass
= info_class
;
5058 req
->PersistentFileId
= persistent_fid
;
5059 req
->VolatileFileId
= volatile_fid
;
5060 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
5063 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1);
5064 req
->BufferLength
= cpu_to_le32(*size
);
5066 memcpy(req
->Buffer
, *data
, *size
);
5069 iov
[0].iov_base
= (char *)req
;
5071 iov
[0].iov_len
= total_len
- 1;
5073 for (i
= 1; i
< rqst
->rq_nvec
; i
++) {
5074 le32_add_cpu(&req
->BufferLength
, size
[i
]);
5075 iov
[i
].iov_base
= (char *)data
[i
];
5076 iov
[i
].iov_len
= size
[i
];
5083 SMB2_set_info_free(struct smb_rqst
*rqst
)
5085 if (rqst
&& rqst
->rq_iov
)
5086 cifs_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
5090 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
5091 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, u8 info_class
,
5092 u8 info_type
, u32 additional_info
, unsigned int num
,
5093 void **data
, unsigned int *size
)
5095 struct smb_rqst rqst
;
5096 struct smb2_set_info_rsp
*rsp
= NULL
;
5098 struct kvec rsp_iov
;
5101 struct cifs_ses
*ses
= tcon
->ses
;
5102 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
5105 if (!ses
|| !server
)
5111 if (smb3_encryption_required(tcon
))
5112 flags
|= CIFS_TRANSFORM_REQ
;
5114 iov
= kmalloc_array(num
, sizeof(struct kvec
), GFP_KERNEL
);
5118 memset(&rqst
, 0, sizeof(struct smb_rqst
));
5122 rc
= SMB2_set_info_init(tcon
, server
,
5123 &rqst
, persistent_fid
, volatile_fid
, pid
,
5124 info_class
, info_type
, additional_info
,
5132 rc
= cifs_send_recv(xid
, ses
, server
,
5133 &rqst
, &resp_buftype
, flags
,
5135 SMB2_set_info_free(&rqst
);
5136 rsp
= (struct smb2_set_info_rsp
*)rsp_iov
.iov_base
;
5139 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
5140 trace_smb3_set_info_err(xid
, persistent_fid
, tcon
->tid
,
5141 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
5144 free_rsp_buf(resp_buftype
, rsp
);
5150 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
5151 u64 volatile_fid
, u32 pid
, __le64
*eof
)
5153 struct smb2_file_eof_info info
;
5157 info
.EndOfFile
= *eof
;
5160 size
= sizeof(struct smb2_file_eof_info
);
5162 trace_smb3_set_eof(xid
, persistent_fid
, tcon
->tid
, tcon
->ses
->Suid
, le64_to_cpu(*eof
));
5164 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
5165 pid
, FILE_END_OF_FILE_INFORMATION
, SMB2_O_INFO_FILE
,
5166 0, 1, &data
, &size
);
5170 SMB2_set_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
5171 u64 persistent_fid
, u64 volatile_fid
,
5172 struct cifs_ntsd
*pnntsd
, int pacllen
, int aclflag
)
5174 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
5175 current
->tgid
, 0, SMB2_O_INFO_SECURITY
, aclflag
,
5176 1, (void **)&pnntsd
, &pacllen
);
5180 SMB2_set_ea(const unsigned int xid
, struct cifs_tcon
*tcon
,
5181 u64 persistent_fid
, u64 volatile_fid
,
5182 struct smb2_file_full_ea_info
*buf
, int len
)
5184 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
5185 current
->tgid
, FILE_FULL_EA_INFORMATION
, SMB2_O_INFO_FILE
,
5186 0, 1, (void **)&buf
, &len
);
5190 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
5191 const u64 persistent_fid
, const u64 volatile_fid
,
5194 struct smb_rqst rqst
;
5196 struct smb2_oplock_break
*req
= NULL
;
5197 struct cifs_ses
*ses
= tcon
->ses
;
5198 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
5199 int flags
= CIFS_OBREAK_OP
;
5200 unsigned int total_len
;
5202 struct kvec rsp_iov
;
5205 cifs_dbg(FYI
, "SMB2_oplock_break\n");
5206 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, server
,
5207 (void **) &req
, &total_len
);
5211 if (smb3_encryption_required(tcon
))
5212 flags
|= CIFS_TRANSFORM_REQ
;
5214 req
->VolatileFid
= volatile_fid
;
5215 req
->PersistentFid
= persistent_fid
;
5216 req
->OplockLevel
= oplock_level
;
5217 req
->hdr
.CreditRequest
= cpu_to_le16(1);
5219 flags
|= CIFS_NO_RSP_BUF
;
5221 iov
[0].iov_base
= (char *)req
;
5222 iov
[0].iov_len
= total_len
;
5224 memset(&rqst
, 0, sizeof(struct smb_rqst
));
5228 rc
= cifs_send_recv(xid
, ses
, server
,
5229 &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
5230 cifs_small_buf_release(req
);
5233 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
5234 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
5241 smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
5242 struct kstatfs
*kst
)
5244 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
5245 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
5246 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
5247 kst
->f_bfree
= kst
->f_bavail
=
5248 le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
5253 copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO
*response_data
,
5254 struct kstatfs
*kst
)
5256 kst
->f_bsize
= le32_to_cpu(response_data
->BlockSize
);
5257 kst
->f_blocks
= le64_to_cpu(response_data
->TotalBlocks
);
5258 kst
->f_bfree
= le64_to_cpu(response_data
->BlocksAvail
);
5259 if (response_data
->UserBlocksAvail
== cpu_to_le64(-1))
5260 kst
->f_bavail
= kst
->f_bfree
;
5262 kst
->f_bavail
= le64_to_cpu(response_data
->UserBlocksAvail
);
5263 if (response_data
->TotalFileNodes
!= cpu_to_le64(-1))
5264 kst
->f_files
= le64_to_cpu(response_data
->TotalFileNodes
);
5265 if (response_data
->FreeFileNodes
!= cpu_to_le64(-1))
5266 kst
->f_ffree
= le64_to_cpu(response_data
->FreeFileNodes
);
5272 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
,
5273 struct TCP_Server_Info
*server
,
5274 int level
, int outbuf_len
, u64 persistent_fid
,
5278 struct smb2_query_info_req
*req
;
5279 unsigned int total_len
;
5281 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
5283 if ((tcon
->ses
== NULL
) || server
== NULL
)
5286 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, server
,
5287 (void **) &req
, &total_len
);
5291 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
5292 req
->FileInfoClass
= level
;
5293 req
->PersistentFileId
= persistent_fid
;
5294 req
->VolatileFileId
= volatile_fid
;
5296 req
->InputBufferOffset
=
5297 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1);
5298 req
->OutputBufferLength
= cpu_to_le32(
5299 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1);
5301 iov
->iov_base
= (char *)req
;
5302 iov
->iov_len
= total_len
;
5307 SMB311_posix_qfs_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
5308 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
5310 struct smb_rqst rqst
;
5311 struct smb2_query_info_rsp
*rsp
= NULL
;
5313 struct kvec rsp_iov
;
5316 struct cifs_ses
*ses
= tcon
->ses
;
5317 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
5318 FILE_SYSTEM_POSIX_INFO
*info
= NULL
;
5321 rc
= build_qfs_info_req(&iov
, tcon
, server
,
5322 FS_POSIX_INFORMATION
,
5323 sizeof(FILE_SYSTEM_POSIX_INFO
),
5324 persistent_fid
, volatile_fid
);
5328 if (smb3_encryption_required(tcon
))
5329 flags
|= CIFS_TRANSFORM_REQ
;
5331 memset(&rqst
, 0, sizeof(struct smb_rqst
));
5335 rc
= cifs_send_recv(xid
, ses
, server
,
5336 &rqst
, &resp_buftype
, flags
, &rsp_iov
);
5337 cifs_small_buf_release(iov
.iov_base
);
5339 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
5340 goto posix_qfsinf_exit
;
5342 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
5344 info
= (FILE_SYSTEM_POSIX_INFO
*)(
5345 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
5346 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
5347 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
5348 sizeof(FILE_SYSTEM_POSIX_INFO
));
5350 copy_posix_fs_info_to_kstatfs(info
, fsdata
);
5353 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
5358 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
5359 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
5361 struct smb_rqst rqst
;
5362 struct smb2_query_info_rsp
*rsp
= NULL
;
5364 struct kvec rsp_iov
;
5367 struct cifs_ses
*ses
= tcon
->ses
;
5368 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
5369 struct smb2_fs_full_size_info
*info
= NULL
;
5372 rc
= build_qfs_info_req(&iov
, tcon
, server
,
5373 FS_FULL_SIZE_INFORMATION
,
5374 sizeof(struct smb2_fs_full_size_info
),
5375 persistent_fid
, volatile_fid
);
5379 if (smb3_encryption_required(tcon
))
5380 flags
|= CIFS_TRANSFORM_REQ
;
5382 memset(&rqst
, 0, sizeof(struct smb_rqst
));
5386 rc
= cifs_send_recv(xid
, ses
, server
,
5387 &rqst
, &resp_buftype
, flags
, &rsp_iov
);
5388 cifs_small_buf_release(iov
.iov_base
);
5390 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
5393 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
5395 info
= (struct smb2_fs_full_size_info
*)(
5396 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
5397 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
5398 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
5399 sizeof(struct smb2_fs_full_size_info
));
5401 smb2_copy_fs_info_to_kstatfs(info
, fsdata
);
5404 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
5409 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
5410 u64 persistent_fid
, u64 volatile_fid
, int level
)
5412 struct smb_rqst rqst
;
5413 struct smb2_query_info_rsp
*rsp
= NULL
;
5415 struct kvec rsp_iov
;
5417 int resp_buftype
, max_len
, min_len
;
5418 struct cifs_ses
*ses
= tcon
->ses
;
5419 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
5420 unsigned int rsp_len
, offset
;
5423 if (level
== FS_DEVICE_INFORMATION
) {
5424 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
5425 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
5426 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
5427 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
5428 min_len
= MIN_FS_ATTR_INFO_SIZE
;
5429 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
5430 max_len
= sizeof(struct smb3_fs_ss_info
);
5431 min_len
= sizeof(struct smb3_fs_ss_info
);
5432 } else if (level
== FS_VOLUME_INFORMATION
) {
5433 max_len
= sizeof(struct smb3_fs_vol_info
) + MAX_VOL_LABEL_LEN
;
5434 min_len
= sizeof(struct smb3_fs_vol_info
);
5436 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
5440 rc
= build_qfs_info_req(&iov
, tcon
, server
,
5442 persistent_fid
, volatile_fid
);
5446 if (smb3_encryption_required(tcon
))
5447 flags
|= CIFS_TRANSFORM_REQ
;
5449 memset(&rqst
, 0, sizeof(struct smb_rqst
));
5453 rc
= cifs_send_recv(xid
, ses
, server
,
5454 &rqst
, &resp_buftype
, flags
, &rsp_iov
);
5455 cifs_small_buf_release(iov
.iov_base
);
5457 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
5460 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
5462 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
5463 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
5464 rc
= smb2_validate_iov(offset
, rsp_len
, &rsp_iov
, min_len
);
5468 if (level
== FS_ATTRIBUTE_INFORMATION
)
5469 memcpy(&tcon
->fsAttrInfo
, offset
5470 + (char *)rsp
, min_t(unsigned int,
5472 else if (level
== FS_DEVICE_INFORMATION
)
5473 memcpy(&tcon
->fsDevInfo
, offset
5474 + (char *)rsp
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
5475 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
5476 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
5477 (offset
+ (char *)rsp
);
5478 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
5479 tcon
->perf_sector_size
=
5480 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
5481 } else if (level
== FS_VOLUME_INFORMATION
) {
5482 struct smb3_fs_vol_info
*vol_info
= (struct smb3_fs_vol_info
*)
5483 (offset
+ (char *)rsp
);
5484 tcon
->vol_serial_number
= vol_info
->VolumeSerialNumber
;
5485 tcon
->vol_create_time
= vol_info
->VolumeCreationTime
;
5489 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
5494 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
5495 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
5496 const __u32 num_lock
, struct smb2_lock_element
*buf
)
5498 struct smb_rqst rqst
;
5500 struct smb2_lock_req
*req
= NULL
;
5502 struct kvec rsp_iov
;
5505 int flags
= CIFS_NO_RSP_BUF
;
5506 unsigned int total_len
;
5507 struct TCP_Server_Info
*server
= cifs_pick_channel(tcon
->ses
);
5509 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
5511 rc
= smb2_plain_req_init(SMB2_LOCK
, tcon
, server
,
5512 (void **) &req
, &total_len
);
5516 if (smb3_encryption_required(tcon
))
5517 flags
|= CIFS_TRANSFORM_REQ
;
5519 req
->hdr
.Id
.SyncId
.ProcessId
= cpu_to_le32(pid
);
5520 req
->LockCount
= cpu_to_le16(num_lock
);
5522 req
->PersistentFileId
= persist_fid
;
5523 req
->VolatileFileId
= volatile_fid
;
5525 count
= num_lock
* sizeof(struct smb2_lock_element
);
5527 iov
[0].iov_base
= (char *)req
;
5528 iov
[0].iov_len
= total_len
- sizeof(struct smb2_lock_element
);
5529 iov
[1].iov_base
= (char *)buf
;
5530 iov
[1].iov_len
= count
;
5532 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
5534 memset(&rqst
, 0, sizeof(struct smb_rqst
));
5538 rc
= cifs_send_recv(xid
, tcon
->ses
, server
,
5539 &rqst
, &resp_buf_type
, flags
,
5541 cifs_small_buf_release(req
);
5543 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
5544 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
5545 trace_smb3_lock_err(xid
, persist_fid
, tcon
->tid
,
5546 tcon
->ses
->Suid
, rc
);
5553 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
5554 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
5555 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
5558 struct smb2_lock_element lock
;
5560 lock
.Offset
= cpu_to_le64(offset
);
5561 lock
.Length
= cpu_to_le64(length
);
5562 lock
.Flags
= cpu_to_le32(lock_flags
);
5563 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
5564 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
5566 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
5570 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
5571 __u8
*lease_key
, const __le32 lease_state
)
5573 struct smb_rqst rqst
;
5575 struct smb2_lease_ack
*req
= NULL
;
5576 struct cifs_ses
*ses
= tcon
->ses
;
5577 int flags
= CIFS_OBREAK_OP
;
5578 unsigned int total_len
;
5580 struct kvec rsp_iov
;
5582 __u64
*please_key_high
;
5583 __u64
*please_key_low
;
5584 struct TCP_Server_Info
*server
= cifs_pick_channel(tcon
->ses
);
5586 cifs_dbg(FYI
, "SMB2_lease_break\n");
5587 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, server
,
5588 (void **) &req
, &total_len
);
5592 if (smb3_encryption_required(tcon
))
5593 flags
|= CIFS_TRANSFORM_REQ
;
5595 req
->hdr
.CreditRequest
= cpu_to_le16(1);
5596 req
->StructureSize
= cpu_to_le16(36);
5599 memcpy(req
->LeaseKey
, lease_key
, 16);
5600 req
->LeaseState
= lease_state
;
5602 flags
|= CIFS_NO_RSP_BUF
;
5604 iov
[0].iov_base
= (char *)req
;
5605 iov
[0].iov_len
= total_len
;
5607 memset(&rqst
, 0, sizeof(struct smb_rqst
));
5611 rc
= cifs_send_recv(xid
, ses
, server
,
5612 &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
5613 cifs_small_buf_release(req
);
5615 please_key_low
= (__u64
*)lease_key
;
5616 please_key_high
= (__u64
*)(lease_key
+8);
5618 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
5619 trace_smb3_lease_err(le32_to_cpu(lease_state
), tcon
->tid
,
5620 ses
->Suid
, *please_key_low
, *please_key_high
, rc
);
5621 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);
5623 trace_smb3_lease_done(le32_to_cpu(lease_state
), tcon
->tid
,
5624 ses
->Suid
, *please_key_low
, *please_key_high
);