4 * Copyright (C) International Business Machines Corp., 2002,2011
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/ctype.h>
26 #include "cifsproto.h"
27 #include "smb2proto.h"
28 #include "cifs_debug.h"
29 #include "cifs_unicode.h"
30 #include "smb2status.h"
33 check_smb2_hdr(struct smb2_hdr
*hdr
, __u64 mid
)
35 __u64 wire_mid
= le64_to_cpu(hdr
->MessageId
);
38 * Make sure that this really is an SMB, that it is a response,
39 * and that the message ids match.
41 if ((*(__le32
*)hdr
->ProtocolId
== SMB2_PROTO_NUMBER
) &&
43 if (hdr
->Flags
& SMB2_FLAGS_SERVER_TO_REDIR
)
46 /* only one valid case where server sends us request */
47 if (hdr
->Command
== SMB2_OPLOCK_BREAK
)
50 cifs_dbg(VFS
, "Received Request not response\n");
52 } else { /* bad signature or mid */
53 if (*(__le32
*)hdr
->ProtocolId
!= SMB2_PROTO_NUMBER
)
54 cifs_dbg(VFS
, "Bad protocol string signature header %x\n",
55 *(unsigned int *) hdr
->ProtocolId
);
57 cifs_dbg(VFS
, "Mids do not match: %llu and %llu\n",
60 cifs_dbg(VFS
, "Bad SMB detected. The Mid=%llu\n", wire_mid
);
65 * The following table defines the expected "StructureSize" of SMB2 responses
66 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS responses.
68 * Note that commands are defined in smb2pdu.h in le16 but the array below is
69 * indexed by command in host byte order
71 static const __le16 smb2_rsp_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
72 /* SMB2_NEGOTIATE */ cpu_to_le16(65),
73 /* SMB2_SESSION_SETUP */ cpu_to_le16(9),
74 /* SMB2_LOGOFF */ cpu_to_le16(4),
75 /* SMB2_TREE_CONNECT */ cpu_to_le16(16),
76 /* SMB2_TREE_DISCONNECT */ cpu_to_le16(4),
77 /* SMB2_CREATE */ cpu_to_le16(89),
78 /* SMB2_CLOSE */ cpu_to_le16(60),
79 /* SMB2_FLUSH */ cpu_to_le16(4),
80 /* SMB2_READ */ cpu_to_le16(17),
81 /* SMB2_WRITE */ cpu_to_le16(17),
82 /* SMB2_LOCK */ cpu_to_le16(4),
83 /* SMB2_IOCTL */ cpu_to_le16(49),
84 /* BB CHECK this ... not listed in documentation */
85 /* SMB2_CANCEL */ cpu_to_le16(0),
86 /* SMB2_ECHO */ cpu_to_le16(4),
87 /* SMB2_QUERY_DIRECTORY */ cpu_to_le16(9),
88 /* SMB2_CHANGE_NOTIFY */ cpu_to_le16(9),
89 /* SMB2_QUERY_INFO */ cpu_to_le16(9),
90 /* SMB2_SET_INFO */ cpu_to_le16(2),
91 /* BB FIXME can also be 44 for lease break */
92 /* SMB2_OPLOCK_BREAK */ cpu_to_le16(24)
96 smb2_check_message(char *buf
, unsigned int length
)
98 struct smb2_hdr
*hdr
= (struct smb2_hdr
*)buf
;
99 struct smb2_pdu
*pdu
= (struct smb2_pdu
*)hdr
;
100 __u64 mid
= le64_to_cpu(hdr
->MessageId
);
101 __u32 len
= get_rfc1002_length(buf
);
102 __u32 clc_len
; /* calculated length */
105 /* BB disable following printk later */
106 cifs_dbg(FYI
, "%s length: 0x%x, smb_buf_length: 0x%x\n",
107 __func__
, length
, len
);
110 * Add function to do table lookup of StructureSize by command
111 * ie Validate the wct via smb2_struct_sizes table above
114 if (length
< sizeof(struct smb2_pdu
)) {
115 if ((length
>= sizeof(struct smb2_hdr
)) && (hdr
->Status
!= 0)) {
116 pdu
->StructureSize2
= 0;
118 * As with SMB/CIFS, on some error cases servers may
119 * not return wct properly
123 cifs_dbg(VFS
, "Length less than SMB header size\n");
127 if (len
> CIFSMaxBufSize
+ MAX_SMB2_HDR_SIZE
- 4) {
128 cifs_dbg(VFS
, "SMB length greater than maximum, mid=%llu\n",
133 if (check_smb2_hdr(hdr
, mid
))
136 if (hdr
->StructureSize
!= SMB2_HEADER_STRUCTURE_SIZE
) {
137 cifs_dbg(VFS
, "Illegal structure size %u\n",
138 le16_to_cpu(hdr
->StructureSize
));
142 command
= le16_to_cpu(hdr
->Command
);
143 if (command
>= NUMBER_OF_SMB2_COMMANDS
) {
144 cifs_dbg(VFS
, "Illegal SMB2 command %d\n", command
);
148 if (smb2_rsp_struct_sizes
[command
] != pdu
->StructureSize2
) {
149 if (command
!= SMB2_OPLOCK_BREAK_HE
&& (hdr
->Status
== 0 ||
150 pdu
->StructureSize2
!= SMB2_ERROR_STRUCTURE_SIZE2
)) {
151 /* error packets have 9 byte structure size */
152 cifs_dbg(VFS
, "Illegal response size %u for command %d\n",
153 le16_to_cpu(pdu
->StructureSize2
), command
);
155 } else if (command
== SMB2_OPLOCK_BREAK_HE
&& (hdr
->Status
== 0)
156 && (le16_to_cpu(pdu
->StructureSize2
) != 44)
157 && (le16_to_cpu(pdu
->StructureSize2
) != 36)) {
158 /* special case for SMB2.1 lease break message */
159 cifs_dbg(VFS
, "Illegal response size %d for oplock break\n",
160 le16_to_cpu(pdu
->StructureSize2
));
165 if (4 + len
!= length
) {
166 cifs_dbg(VFS
, "Total length %u RFC1002 length %u mismatch mid %llu\n",
167 length
, 4 + len
, mid
);
171 clc_len
= smb2_calc_size(hdr
);
173 if (4 + len
!= clc_len
) {
174 cifs_dbg(FYI
, "Calculated size %u length %u mismatch mid %llu\n",
175 clc_len
, 4 + len
, mid
);
176 /* create failed on symlink */
177 if (command
== SMB2_CREATE_HE
&&
178 hdr
->Status
== STATUS_STOPPED_ON_SYMLINK
)
180 /* Windows 7 server returns 24 bytes more */
181 if (clc_len
+ 20 == len
&& command
== SMB2_OPLOCK_BREAK_HE
)
183 /* server can return one byte more due to implied bcc[0] */
184 if (clc_len
== 4 + len
+ 1)
188 * Some windows servers (win2016) will pad also the final
189 * PDU in a compound to 8 bytes.
191 if (((clc_len
+ 7) & ~7) == len
)
195 * MacOS server pads after SMB2.1 write response with 3 bytes
196 * of junk. Other servers match RFC1001 len to actual
197 * SMB2/SMB3 frame length (header + smb2 response specific data)
198 * Log the server error (once), but allow it and continue
199 * since the frame is parseable.
201 if (clc_len
< 4 /* RFC1001 header size */ + len
) {
202 printk_once(KERN_WARNING
203 "SMB2 server sent bad RFC1001 len %d not %d\n",
214 * The size of the variable area depends on the offset and length fields
215 * located in different fields for various SMB2 responses. SMB2 responses
216 * with no variable length info, show an offset of zero for the offset field.
218 static const bool has_smb2_data_area
[NUMBER_OF_SMB2_COMMANDS
] = {
219 /* SMB2_NEGOTIATE */ true,
220 /* SMB2_SESSION_SETUP */ true,
221 /* SMB2_LOGOFF */ false,
222 /* SMB2_TREE_CONNECT */ false,
223 /* SMB2_TREE_DISCONNECT */ false,
224 /* SMB2_CREATE */ true,
225 /* SMB2_CLOSE */ false,
226 /* SMB2_FLUSH */ false,
227 /* SMB2_READ */ true,
228 /* SMB2_WRITE */ false,
229 /* SMB2_LOCK */ false,
230 /* SMB2_IOCTL */ true,
231 /* SMB2_CANCEL */ false, /* BB CHECK this not listed in documentation */
232 /* SMB2_ECHO */ false,
233 /* SMB2_QUERY_DIRECTORY */ true,
234 /* SMB2_CHANGE_NOTIFY */ true,
235 /* SMB2_QUERY_INFO */ true,
236 /* SMB2_SET_INFO */ false,
237 /* SMB2_OPLOCK_BREAK */ false
241 * Returns the pointer to the beginning of the data area. Length of the data
242 * area and the offset to it (from the beginning of the smb are also returned.
245 smb2_get_data_area_len(int *off
, int *len
, struct smb2_hdr
*hdr
)
250 /* error responses do not have data area */
251 if (hdr
->Status
&& hdr
->Status
!= STATUS_MORE_PROCESSING_REQUIRED
&&
252 (((struct smb2_err_rsp
*)hdr
)->StructureSize
) ==
253 SMB2_ERROR_STRUCTURE_SIZE2
)
257 * Following commands have data areas so we have to get the location
258 * of the data buffer offset and data buffer length for the particular
261 switch (hdr
->Command
) {
264 ((struct smb2_negotiate_rsp
*)hdr
)->SecurityBufferOffset
);
266 ((struct smb2_negotiate_rsp
*)hdr
)->SecurityBufferLength
);
268 case SMB2_SESSION_SETUP
:
270 ((struct smb2_sess_setup_rsp
*)hdr
)->SecurityBufferOffset
);
272 ((struct smb2_sess_setup_rsp
*)hdr
)->SecurityBufferLength
);
276 ((struct smb2_create_rsp
*)hdr
)->CreateContextsOffset
);
278 ((struct smb2_create_rsp
*)hdr
)->CreateContextsLength
);
280 case SMB2_QUERY_INFO
:
282 ((struct smb2_query_info_rsp
*)hdr
)->OutputBufferOffset
);
284 ((struct smb2_query_info_rsp
*)hdr
)->OutputBufferLength
);
287 *off
= ((struct smb2_read_rsp
*)hdr
)->DataOffset
;
288 *len
= le32_to_cpu(((struct smb2_read_rsp
*)hdr
)->DataLength
);
290 case SMB2_QUERY_DIRECTORY
:
292 ((struct smb2_query_directory_rsp
*)hdr
)->OutputBufferOffset
);
294 ((struct smb2_query_directory_rsp
*)hdr
)->OutputBufferLength
);
298 ((struct smb2_ioctl_rsp
*)hdr
)->OutputOffset
);
299 *len
= le32_to_cpu(((struct smb2_ioctl_rsp
*)hdr
)->OutputCount
);
301 case SMB2_CHANGE_NOTIFY
:
303 /* BB FIXME for unimplemented cases above */
304 cifs_dbg(VFS
, "no length check for command\n");
309 * Invalid length or offset probably means data area is invalid, but
310 * we have little choice but to ignore the data area in this case.
313 cifs_dbg(VFS
, "offset %d too large, data area ignored\n", *off
);
316 } else if (*off
< 0) {
317 cifs_dbg(VFS
, "negative offset %d to data invalid ignore data area\n",
321 } else if (*len
< 0) {
322 cifs_dbg(VFS
, "negative data length %d invalid, data area ignored\n",
325 } else if (*len
> 128 * 1024) {
326 cifs_dbg(VFS
, "data area larger than 128K: %d\n", *len
);
330 /* return pointer to beginning of data area, ie offset from SMB start */
331 if ((*off
!= 0) && (*len
!= 0))
332 return (char *)(&hdr
->ProtocolId
[0]) + *off
;
338 * Calculate the size of the SMB message based on the fixed header
339 * portion, the number of word parameters and the data portion of the message.
342 smb2_calc_size(void *buf
)
344 struct smb2_hdr
*hdr
= (struct smb2_hdr
*)buf
;
345 struct smb2_pdu
*pdu
= (struct smb2_pdu
*)hdr
;
346 int offset
; /* the offset from the beginning of SMB to data area */
347 int data_length
; /* the length of the variable length data area */
348 /* Structure Size has already been checked to make sure it is 64 */
349 int len
= 4 + le16_to_cpu(pdu
->hdr
.StructureSize
);
352 * StructureSize2, ie length of fixed parameter area has already
353 * been checked to make sure it is the correct length.
355 len
+= le16_to_cpu(pdu
->StructureSize2
);
357 if (has_smb2_data_area
[le16_to_cpu(hdr
->Command
)] == false)
360 smb2_get_data_area_len(&offset
, &data_length
, hdr
);
361 cifs_dbg(FYI
, "SMB2 data length %d offset %d\n", data_length
, offset
);
363 if (data_length
> 0) {
365 * Check to make sure that data area begins after fixed area,
366 * Note that last byte of the fixed area is part of data area
367 * for some commands, typically those with odd StructureSize,
368 * so we must add one to the calculation (and 4 to account for
369 * the size of the RFC1001 hdr.
371 if (offset
+ 4 + 1 < len
) {
372 cifs_dbg(VFS
, "data area offset %d overlaps SMB2 header %d\n",
373 offset
+ 4 + 1, len
);
376 len
= 4 + offset
+ data_length
;
380 cifs_dbg(FYI
, "SMB2 len %d\n", len
);
384 /* Note: caller must free return buffer */
386 cifs_convert_path_to_utf16(const char *from
, struct cifs_sb_info
*cifs_sb
)
389 const char *start_of_path
;
393 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SFM_CHR
)
394 map_type
= SFM_MAP_UNI_RSVD
;
395 else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
396 map_type
= SFU_MAP_UNI_RSVD
;
398 map_type
= NO_MAP_UNI_RSVD
;
400 /* Windows doesn't allow paths beginning with \ */
402 start_of_path
= from
+ 1;
404 start_of_path
= from
;
405 to
= cifs_strndup_to_utf16(start_of_path
, PATH_MAX
, &len
,
406 cifs_sb
->local_nls
, map_type
);
411 smb2_get_lease_state(struct cifsInodeInfo
*cinode
)
415 if (CIFS_CACHE_WRITE(cinode
))
416 lease
|= SMB2_LEASE_WRITE_CACHING
;
417 if (CIFS_CACHE_HANDLE(cinode
))
418 lease
|= SMB2_LEASE_HANDLE_CACHING
;
419 if (CIFS_CACHE_READ(cinode
))
420 lease
|= SMB2_LEASE_READ_CACHING
;
424 struct smb2_lease_break_work
{
425 struct work_struct lease_break
;
426 struct tcon_link
*tlink
;
432 cifs_ses_oplock_break(struct work_struct
*work
)
434 struct smb2_lease_break_work
*lw
= container_of(work
,
435 struct smb2_lease_break_work
, lease_break
);
438 rc
= SMB2_lease_break(0, tlink_tcon(lw
->tlink
), lw
->lease_key
,
440 cifs_dbg(FYI
, "Lease release rc %d\n", rc
);
441 cifs_put_tlink(lw
->tlink
);
446 smb2_tcon_has_lease(struct cifs_tcon
*tcon
, struct smb2_lease_break
*rsp
,
447 struct smb2_lease_break_work
*lw
)
451 struct list_head
*tmp
;
452 struct cifsFileInfo
*cfile
;
453 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
454 struct cifs_pending_open
*open
;
455 struct cifsInodeInfo
*cinode
;
456 int ack_req
= le32_to_cpu(rsp
->Flags
&
457 SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED
);
459 lease_state
= le32_to_cpu(rsp
->NewLeaseState
);
461 list_for_each(tmp
, &tcon
->openFileList
) {
462 cfile
= list_entry(tmp
, struct cifsFileInfo
, tlist
);
463 cinode
= CIFS_I(d_inode(cfile
->dentry
));
465 if (memcmp(cinode
->lease_key
, rsp
->LeaseKey
,
466 SMB2_LEASE_KEY_SIZE
))
469 cifs_dbg(FYI
, "found in the open list\n");
470 cifs_dbg(FYI
, "lease key match, lease break 0x%x\n",
471 le32_to_cpu(rsp
->NewLeaseState
));
473 server
->ops
->set_oplock_level(cinode
, lease_state
, 0, NULL
);
476 cfile
->oplock_break_cancelled
= false;
478 cfile
->oplock_break_cancelled
= true;
480 queue_work(cifsiod_wq
, &cfile
->oplock_break
);
486 list_for_each_entry(open
, &tcon
->pending_opens
, olist
) {
487 if (memcmp(open
->lease_key
, rsp
->LeaseKey
,
488 SMB2_LEASE_KEY_SIZE
))
491 if (!found
&& ack_req
) {
493 memcpy(lw
->lease_key
, open
->lease_key
,
494 SMB2_LEASE_KEY_SIZE
);
495 lw
->tlink
= cifs_get_tlink(open
->tlink
);
496 queue_work(cifsiod_wq
, &lw
->lease_break
);
499 cifs_dbg(FYI
, "found in the pending open list\n");
500 cifs_dbg(FYI
, "lease key match, lease break 0x%x\n",
501 le32_to_cpu(rsp
->NewLeaseState
));
503 open
->oplock
= lease_state
;
509 smb2_is_valid_lease_break(char *buffer
)
511 struct smb2_lease_break
*rsp
= (struct smb2_lease_break
*)buffer
;
512 struct list_head
*tmp
, *tmp1
, *tmp2
;
513 struct TCP_Server_Info
*server
;
514 struct cifs_ses
*ses
;
515 struct cifs_tcon
*tcon
;
516 struct smb2_lease_break_work
*lw
;
518 lw
= kmalloc(sizeof(struct smb2_lease_break_work
), GFP_KERNEL
);
522 INIT_WORK(&lw
->lease_break
, cifs_ses_oplock_break
);
523 lw
->lease_state
= rsp
->NewLeaseState
;
525 cifs_dbg(FYI
, "Checking for lease break\n");
527 /* look up tcon based on tid & uid */
528 spin_lock(&cifs_tcp_ses_lock
);
529 list_for_each(tmp
, &cifs_tcp_ses_list
) {
530 server
= list_entry(tmp
, struct TCP_Server_Info
, tcp_ses_list
);
532 list_for_each(tmp1
, &server
->smb_ses_list
) {
533 ses
= list_entry(tmp1
, struct cifs_ses
, smb_ses_list
);
535 list_for_each(tmp2
, &ses
->tcon_list
) {
536 tcon
= list_entry(tmp2
, struct cifs_tcon
,
538 spin_lock(&tcon
->open_file_lock
);
540 &tcon
->stats
.cifs_stats
.num_oplock_brks
);
541 if (smb2_tcon_has_lease(tcon
, rsp
, lw
)) {
542 spin_unlock(&tcon
->open_file_lock
);
543 spin_unlock(&cifs_tcp_ses_lock
);
546 spin_unlock(&tcon
->open_file_lock
);
550 spin_unlock(&cifs_tcp_ses_lock
);
552 cifs_dbg(FYI
, "Can not process lease break - no lease matched\n");
557 smb2_is_valid_oplock_break(char *buffer
, struct TCP_Server_Info
*server
)
559 struct smb2_oplock_break
*rsp
= (struct smb2_oplock_break
*)buffer
;
560 struct list_head
*tmp
, *tmp1
, *tmp2
;
561 struct cifs_ses
*ses
;
562 struct cifs_tcon
*tcon
;
563 struct cifsInodeInfo
*cinode
;
564 struct cifsFileInfo
*cfile
;
566 cifs_dbg(FYI
, "Checking for oplock break\n");
568 if (rsp
->hdr
.Command
!= SMB2_OPLOCK_BREAK
)
571 if (rsp
->StructureSize
!=
572 smb2_rsp_struct_sizes
[SMB2_OPLOCK_BREAK_HE
]) {
573 if (le16_to_cpu(rsp
->StructureSize
) == 44)
574 return smb2_is_valid_lease_break(buffer
);
579 cifs_dbg(FYI
, "oplock level 0x%x\n", rsp
->OplockLevel
);
581 /* look up tcon based on tid & uid */
582 spin_lock(&cifs_tcp_ses_lock
);
583 list_for_each(tmp
, &server
->smb_ses_list
) {
584 ses
= list_entry(tmp
, struct cifs_ses
, smb_ses_list
);
586 list_for_each(tmp1
, &ses
->tcon_list
) {
587 tcon
= list_entry(tmp1
, struct cifs_tcon
, tcon_list
);
589 spin_lock(&tcon
->open_file_lock
);
590 list_for_each(tmp2
, &tcon
->openFileList
) {
591 cfile
= list_entry(tmp2
, struct cifsFileInfo
,
593 if (rsp
->PersistentFid
!=
594 cfile
->fid
.persistent_fid
||
596 cfile
->fid
.volatile_fid
)
599 cifs_dbg(FYI
, "file id match, oplock break\n");
601 &tcon
->stats
.cifs_stats
.num_oplock_brks
);
602 cinode
= CIFS_I(d_inode(cfile
->dentry
));
603 spin_lock(&cfile
->file_info_lock
);
604 if (!CIFS_CACHE_WRITE(cinode
) &&
605 rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_NONE
)
606 cfile
->oplock_break_cancelled
= true;
608 cfile
->oplock_break_cancelled
= false;
610 set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK
,
614 * Set flag if the server downgrades the oplock
617 if (rsp
->OplockLevel
)
619 CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2
,
623 CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2
,
625 spin_unlock(&cfile
->file_info_lock
);
626 queue_work(cifsiod_wq
, &cfile
->oplock_break
);
628 spin_unlock(&tcon
->open_file_lock
);
629 spin_unlock(&cifs_tcp_ses_lock
);
632 spin_unlock(&tcon
->open_file_lock
);
635 spin_unlock(&cifs_tcp_ses_lock
);
636 cifs_dbg(FYI
, "Can not process oplock break for non-existent connection\n");
641 smb2_cancelled_close_fid(struct work_struct
*work
)
643 struct close_cancelled_open
*cancelled
= container_of(work
,
644 struct close_cancelled_open
, work
);
646 cifs_dbg(VFS
, "Close unmatched open\n");
648 SMB2_close(0, cancelled
->tcon
, cancelled
->fid
.persistent_fid
,
649 cancelled
->fid
.volatile_fid
);
650 cifs_put_tcon(cancelled
->tcon
);
655 smb2_handle_cancelled_mid(char *buffer
, struct TCP_Server_Info
*server
)
657 struct smb2_hdr
*hdr
= (struct smb2_hdr
*)buffer
;
658 struct smb2_create_rsp
*rsp
= (struct smb2_create_rsp
*)buffer
;
659 struct cifs_tcon
*tcon
;
660 struct close_cancelled_open
*cancelled
;
662 if (hdr
->Command
!= SMB2_CREATE
|| hdr
->Status
!= STATUS_SUCCESS
)
665 cancelled
= kzalloc(sizeof(*cancelled
), GFP_KERNEL
);
669 tcon
= smb2_find_smb_tcon(server
, hdr
->SessionId
, hdr
->TreeId
);
675 cancelled
->fid
.persistent_fid
= rsp
->PersistentFileId
;
676 cancelled
->fid
.volatile_fid
= rsp
->VolatileFileId
;
677 cancelled
->tcon
= tcon
;
678 INIT_WORK(&cancelled
->work
, smb2_cancelled_close_fid
);
679 queue_work(cifsiod_wq
, &cancelled
->work
);