2 Unix SMB/CIFS implementation.
3 Blocking Locking functions
4 Copyright (C) Jeremy Allison 1998-2003
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #define DBGC_CLASS DBGC_LOCKING
26 /****************************************************************************
27 This is the structure to queue to implement blocking locks.
28 notify. It consists of the requesting SMB and the expiry time.
29 *****************************************************************************/
31 typedef struct _blocking_lock_record
{
32 struct _blocking_lock_record
*next
;
33 struct _blocking_lock_record
*prev
;
36 struct timeval expire_time
;
41 uint32 blocking_pid
; /* PID that blocks us. */
42 enum brl_flavour lock_flav
;
43 enum brl_type lock_type
;
46 } blocking_lock_record
;
48 /* dlink list we store pending lock records on. */
49 static blocking_lock_record
*blocking_lock_queue
;
51 /* dlink list we move cancelled lock records onto. */
52 static blocking_lock_record
*blocking_lock_cancelled_queue
;
54 /* The event that makes us process our blocking lock queue */
55 static struct timed_event
*brl_timeout
;
57 /****************************************************************************
58 Destructor for the above structure.
59 ****************************************************************************/
61 static void free_blocking_lock_record(blocking_lock_record
*blr
)
63 SAFE_FREE(blr
->inbuf
);
67 /****************************************************************************
68 Determine if this is a secondary element of a chained SMB.
69 **************************************************************************/
71 static BOOL
in_chained_smb(void)
73 return (chain_size
!= 0);
76 static void received_unlock_msg(struct messaging_context
*msg
,
79 struct server_id server_id
,
81 static void process_blocking_lock_queue(void);
83 static void brl_timeout_fn(struct event_context
*event_ctx
,
84 struct timed_event
*te
,
85 const struct timeval
*now
,
88 SMB_ASSERT(brl_timeout
== te
);
89 TALLOC_FREE(brl_timeout
);
91 change_to_root_user(); /* TODO: Possibly run all timed events as
94 process_blocking_lock_queue();
97 /****************************************************************************
98 After a change to blocking_lock_queue, recalculate the timed_event for the
100 ****************************************************************************/
102 static BOOL
recalc_brl_timeout(void)
104 blocking_lock_record
*brl
;
105 struct timeval next_timeout
;
107 TALLOC_FREE(brl_timeout
);
109 next_timeout
= timeval_zero();
111 for (brl
= blocking_lock_queue
; brl
; brl
= brl
->next
) {
112 if (timeval_is_zero(&brl
->expire_time
)) {
114 * If we're blocked on pid 0xFFFFFFFF this is
115 * a POSIX lock, so calculate a timeout of
116 * 10 seconds into the future.
118 if (brl
->blocking_pid
== 0xFFFFFFFF) {
119 struct timeval psx_to
= timeval_current_ofs(10, 0);
120 next_timeout
= timeval_min(&next_timeout
, &psx_to
);
126 if (timeval_is_zero(&next_timeout
)) {
127 next_timeout
= brl
->expire_time
;
130 next_timeout
= timeval_min(&next_timeout
,
135 if (timeval_is_zero(&next_timeout
)) {
139 if (!(brl_timeout
= event_add_timed(smbd_event_context(), NULL
,
140 next_timeout
, "brl_timeout",
141 brl_timeout_fn
, NULL
))) {
149 /****************************************************************************
150 Function to push a blocking lock request onto the lock queue.
151 ****************************************************************************/
153 BOOL
push_blocking_lock_request( struct byte_range_lock
*br_lck
,
154 char *inbuf
, int length
,
159 enum brl_type lock_type
,
160 enum brl_flavour lock_flav
,
165 static BOOL set_lock_msg
;
166 blocking_lock_record
*blr
;
169 if(in_chained_smb() ) {
170 DEBUG(0,("push_blocking_lock_request: cannot queue a chained request (currently).\n"));
175 * Now queue an entry on the blocking lock queue. We setup
176 * the expiration time here.
179 if((blr
= SMB_MALLOC_P(blocking_lock_record
)) == NULL
) {
180 DEBUG(0,("push_blocking_lock_request: Malloc fail !\n" ));
187 if((blr
->inbuf
= (char *)SMB_MALLOC(length
)) == NULL
) {
188 DEBUG(0,("push_blocking_lock_request: Malloc fail (2)!\n" ));
193 blr
->com_type
= CVAL(inbuf
,smb_com
);
195 if (lock_timeout
== -1) {
196 blr
->expire_time
.tv_sec
= 0;
197 blr
->expire_time
.tv_usec
= 0; /* Never expire. */
199 blr
->expire_time
= timeval_current_ofs(lock_timeout
/1000,
200 (lock_timeout
% 1000) * 1000);
202 blr
->lock_num
= lock_num
;
203 blr
->lock_pid
= lock_pid
;
204 blr
->blocking_pid
= blocking_pid
;
205 blr
->lock_flav
= lock_flav
;
206 blr
->lock_type
= lock_type
;
207 blr
->offset
= offset
;
209 memcpy(blr
->inbuf
, inbuf
, length
);
210 blr
->length
= length
;
212 /* Add a pending lock record for this. */
213 status
= brl_lock(smbd_messaging_context(), br_lck
,
218 lock_type
== READ_LOCK
? PENDING_READ_LOCK
: PENDING_WRITE_LOCK
,
220 lock_timeout
? True
: False
, /* blocking_lock. */
223 if (!NT_STATUS_IS_OK(status
)) {
224 DEBUG(0,("push_blocking_lock_request: failed to add PENDING_LOCK record.\n"));
225 DLIST_REMOVE(blocking_lock_queue
, blr
);
226 free_blocking_lock_record(blr
);
230 DLIST_ADD_END(blocking_lock_queue
, blr
, blocking_lock_record
*);
231 recalc_brl_timeout();
233 /* Ensure we'll receive messages when this is unlocked. */
235 messaging_register(smbd_messaging_context(), NULL
,
236 MSG_SMB_UNLOCK
, received_unlock_msg
);
240 DEBUG(3,("push_blocking_lock_request: lock request length=%d blocked with "
241 "expiry time (%u sec. %u usec) (+%d msec) for fnum = %d, name = %s\n",
242 length
, (unsigned int)blr
->expire_time
.tv_sec
,
243 (unsigned int)blr
->expire_time
.tv_usec
, lock_timeout
,
244 blr
->fsp
->fnum
, blr
->fsp
->fsp_name
));
246 /* Push the MID of this packet on the signing queue. */
247 srv_defer_sign_response(SVAL(inbuf
,smb_mid
));
252 /****************************************************************************
253 Return a smd with a given size.
254 *****************************************************************************/
256 static void send_blocking_reply(char *outbuf
, int outsize
, const char *inbuf
)
259 smb_setlen(inbuf
, outbuf
,outsize
- 4);
262 if (!send_smb(smbd_server_fd(),outbuf
)) {
263 exit_server_cleanly("send_blocking_reply: send_smb failed.");
267 /****************************************************************************
268 Return a lockingX success SMB.
269 *****************************************************************************/
271 static void reply_lockingX_success(blocking_lock_record
*blr
)
273 char *outbuf
= get_OutBuffer();
274 int bufsize
= BUFFER_SIZE
;
275 char *inbuf
= blr
->inbuf
;
278 construct_reply_common(inbuf
, outbuf
);
279 set_message(inbuf
,outbuf
,2,0,True
);
282 * As this message is a lockingX call we must handle
283 * any following chained message correctly.
284 * This is normally handled in construct_reply(),
285 * but as that calls switch_message, we can't use
286 * that here and must set up the chain info manually.
289 outsize
= chain_reply(inbuf
,outbuf
,blr
->length
,bufsize
);
291 outsize
+= chain_size
;
293 send_blocking_reply(outbuf
,outsize
,inbuf
);
296 /****************************************************************************
297 Return a generic lock fail error blocking call.
298 *****************************************************************************/
300 static void generic_blocking_lock_error(blocking_lock_record
*blr
, NTSTATUS status
)
302 char *outbuf
= get_OutBuffer();
303 char *inbuf
= blr
->inbuf
;
304 construct_reply_common(inbuf
, outbuf
);
306 /* whenever a timeout is given w2k maps LOCK_NOT_GRANTED to
307 FILE_LOCK_CONFLICT! (tridge) */
308 if (NT_STATUS_EQUAL(status
, NT_STATUS_LOCK_NOT_GRANTED
)) {
309 status
= NT_STATUS_FILE_LOCK_CONFLICT
;
312 if (NT_STATUS_EQUAL(status
, NT_STATUS_FILE_LOCK_CONFLICT
)) {
313 /* Store the last lock error. */
314 files_struct
*fsp
= blr
->fsp
;
316 fsp
->last_lock_failure
.context
.smbpid
= blr
->lock_pid
;
317 fsp
->last_lock_failure
.context
.tid
= fsp
->conn
->cnum
;
318 fsp
->last_lock_failure
.context
.pid
= procid_self();
319 fsp
->last_lock_failure
.start
= blr
->offset
;
320 fsp
->last_lock_failure
.size
= blr
->count
;
321 fsp
->last_lock_failure
.fnum
= fsp
->fnum
;
322 fsp
->last_lock_failure
.lock_type
= READ_LOCK
; /* Don't care. */
323 fsp
->last_lock_failure
.lock_flav
= blr
->lock_flav
;
327 if (!send_smb(smbd_server_fd(),outbuf
)) {
328 exit_server_cleanly("generic_blocking_lock_error: send_smb failed.");
332 /****************************************************************************
333 Return a lock fail error for a lockingX call. Undo all the locks we have
335 *****************************************************************************/
337 static void reply_lockingX_error(blocking_lock_record
*blr
, NTSTATUS status
)
339 char *inbuf
= blr
->inbuf
;
340 files_struct
*fsp
= blr
->fsp
;
341 uint16 num_ulocks
= SVAL(inbuf
,smb_vwv6
);
342 SMB_BIG_UINT count
= (SMB_BIG_UINT
)0, offset
= (SMB_BIG_UINT
) 0;
344 unsigned char locktype
= CVAL(inbuf
,smb_vwv3
);
345 BOOL large_file_format
= (locktype
& LOCKING_ANDX_LARGE_FILES
);
349 data
= smb_buf(inbuf
) + ((large_file_format
? 20 : 10)*num_ulocks
);
352 * Data now points at the beginning of the list
353 * of smb_lkrng structs.
357 * Ensure we don't do a remove on the lock that just failed,
358 * as under POSIX rules, if we have a lock already there, we
359 * will delete it (and we shouldn't) .....
362 for(i
= blr
->lock_num
- 1; i
>= 0; i
--) {
365 lock_pid
= get_lock_pid( data
, i
, large_file_format
);
366 count
= get_lock_count( data
, i
, large_file_format
);
367 offset
= get_lock_offset( data
, i
, large_file_format
, &err
);
370 * We know err cannot be set as if it was the lock
371 * request would never have been queued. JRA.
374 do_unlock(smbd_messaging_context(),
382 generic_blocking_lock_error(blr
, status
);
385 /****************************************************************************
386 Return a lock fail error.
387 *****************************************************************************/
389 static void blocking_lock_reply_error(blocking_lock_record
*blr
, NTSTATUS status
)
391 switch(blr
->com_type
) {
393 reply_lockingX_error(blr
, status
);
398 char *outbuf
= get_OutBuffer();
399 char *inbuf
= blr
->inbuf
;
400 construct_reply_common(inbuf
, outbuf
);
401 /* construct_reply_common has done us the favor to pre-fill the
402 * command field with SMBtranss2 which is wrong :-)
404 SCVAL(outbuf
,smb_com
,SMBtrans2
);
406 if (!send_smb(smbd_server_fd(),outbuf
)) {
407 exit_server_cleanly("blocking_lock_reply_error: send_smb failed.");
412 DEBUG(0,("blocking_lock_reply_error: PANIC - unknown type on blocking lock queue - exiting.!\n"));
413 exit_server("PANIC - unknown type on blocking lock queue");
417 /****************************************************************************
418 Attempt to finish off getting all pending blocking locks for a lockingX call.
419 Returns True if we want to be removed from the list.
420 *****************************************************************************/
422 static BOOL
process_lockingX(blocking_lock_record
*blr
)
424 char *inbuf
= blr
->inbuf
;
425 unsigned char locktype
= CVAL(inbuf
,smb_vwv3
);
426 files_struct
*fsp
= blr
->fsp
;
427 uint16 num_ulocks
= SVAL(inbuf
,smb_vwv6
);
428 uint16 num_locks
= SVAL(inbuf
,smb_vwv7
);
429 SMB_BIG_UINT count
= (SMB_BIG_UINT
)0, offset
= (SMB_BIG_UINT
)0;
431 BOOL large_file_format
= (locktype
& LOCKING_ANDX_LARGE_FILES
);
433 NTSTATUS status
= NT_STATUS_OK
;
435 data
= smb_buf(inbuf
) + ((large_file_format
? 20 : 10)*num_ulocks
);
438 * Data now points at the beginning of the list
439 * of smb_lkrng structs.
442 for(; blr
->lock_num
< num_locks
; blr
->lock_num
++) {
443 struct byte_range_lock
*br_lck
= NULL
;
446 lock_pid
= get_lock_pid( data
, blr
->lock_num
, large_file_format
);
447 count
= get_lock_count( data
, blr
->lock_num
, large_file_format
);
448 offset
= get_lock_offset( data
, blr
->lock_num
, large_file_format
, &err
);
451 * We know err cannot be set as if it was the lock
452 * request would never have been queued. JRA.
455 br_lck
= do_lock(smbd_messaging_context(),
460 ((locktype
& LOCKING_ANDX_SHARED_LOCK
) ?
461 READ_LOCK
: WRITE_LOCK
),
469 if (NT_STATUS_IS_ERR(status
)) {
474 if(blr
->lock_num
== num_locks
) {
476 * Success - we got all the locks.
479 DEBUG(3,("process_lockingX file = %s, fnum=%d type=%d num_locks=%d\n",
480 fsp
->fsp_name
, fsp
->fnum
, (unsigned int)locktype
, num_locks
) );
482 reply_lockingX_success(blr
);
484 } else if (!NT_STATUS_EQUAL(status
,NT_STATUS_LOCK_NOT_GRANTED
) &&
485 !NT_STATUS_EQUAL(status
,NT_STATUS_FILE_LOCK_CONFLICT
)) {
487 * We have other than a "can't get lock"
488 * error. Free any locks we had and return an error.
489 * Return True so we get dequeued.
492 blocking_lock_reply_error(blr
, status
);
497 * Still can't get all the locks - keep waiting.
500 DEBUG(10,("process_lockingX: only got %d locks of %d needed for file %s, fnum = %d. \
502 blr
->lock_num
, num_locks
, fsp
->fsp_name
, fsp
->fnum
));
507 /****************************************************************************
508 Attempt to get the posix lock request from a SMBtrans2 call.
509 Returns True if we want to be removed from the list.
510 *****************************************************************************/
512 static BOOL
process_trans2(blocking_lock_record
*blr
)
514 char *inbuf
= blr
->inbuf
;
518 struct byte_range_lock
*br_lck
= do_lock(smbd_messaging_context(),
530 if (!NT_STATUS_IS_OK(status
)) {
531 if (ERROR_WAS_LOCK_DENIED(status
)) {
532 /* Still can't get the lock, just keep waiting. */
536 * We have other than a "can't get lock"
537 * error. Send an error and return True so we get dequeued.
539 blocking_lock_reply_error(blr
, status
);
543 /* We finally got the lock, return success. */
544 outbuf
= get_OutBuffer();
545 construct_reply_common(inbuf
, outbuf
);
546 SCVAL(outbuf
,smb_com
,SMBtrans2
);
548 /* Fake up max_data_bytes here - we know it fits. */
549 send_trans2_replies(inbuf
, outbuf
, max_send
, params
, 2, NULL
, 0, 0xffff);
554 /****************************************************************************
555 Process a blocking lock SMB.
556 Returns True if we want to be removed from the list.
557 *****************************************************************************/
559 static BOOL
blocking_lock_record_process(blocking_lock_record
*blr
)
561 switch(blr
->com_type
) {
563 return process_lockingX(blr
);
566 return process_trans2(blr
);
568 DEBUG(0,("blocking_lock_record_process: PANIC - unknown type on blocking lock queue - exiting.!\n"));
569 exit_server("PANIC - unknown type on blocking lock queue");
571 return False
; /* Keep compiler happy. */
574 /****************************************************************************
575 Cancel entries by fnum from the blocking lock pending queue.
576 *****************************************************************************/
578 void cancel_pending_lock_requests_by_fid(files_struct
*fsp
, struct byte_range_lock
*br_lck
)
580 blocking_lock_record
*blr
, *next
= NULL
;
582 for(blr
= blocking_lock_queue
; blr
; blr
= next
) {
584 if(blr
->fsp
->fnum
== fsp
->fnum
) {
585 unsigned char locktype
= 0;
587 if (blr
->com_type
== SMBlockingX
) {
588 locktype
= CVAL(blr
->inbuf
,smb_vwv3
);
592 DEBUG(10,("remove_pending_lock_requests_by_fid - removing request type %d for \
593 file %s fnum = %d\n", blr
->com_type
, fsp
->fsp_name
, fsp
->fnum
));
595 brl_lock_cancel(br_lck
,
602 blocking_lock_cancel(fsp
,
608 NT_STATUS_RANGE_NOT_LOCKED
);
614 /****************************************************************************
615 Delete entries by mid from the blocking lock pending queue. Always send reply.
616 *****************************************************************************/
618 void remove_pending_lock_requests_by_mid(int mid
)
620 blocking_lock_record
*blr
, *next
= NULL
;
622 for(blr
= blocking_lock_queue
; blr
; blr
= next
) {
624 if(SVAL(blr
->inbuf
,smb_mid
) == mid
) {
625 files_struct
*fsp
= blr
->fsp
;
626 struct byte_range_lock
*br_lck
= brl_get_locks(NULL
, fsp
);
629 DEBUG(10,("remove_pending_lock_requests_by_mid - removing request type %d for \
630 file %s fnum = %d\n", blr
->com_type
, fsp
->fsp_name
, fsp
->fnum
));
632 brl_lock_cancel(br_lck
,
641 blocking_lock_reply_error(blr
,NT_STATUS_FILE_LOCK_CONFLICT
);
642 DLIST_REMOVE(blocking_lock_queue
, blr
);
643 free_blocking_lock_record(blr
);
648 /****************************************************************************
649 Is this mid a blocking lock request on the queue ?
650 *****************************************************************************/
652 BOOL
blocking_lock_was_deferred(int mid
)
654 blocking_lock_record
*blr
, *next
= NULL
;
656 for(blr
= blocking_lock_queue
; blr
; blr
= next
) {
658 if(SVAL(blr
->inbuf
,smb_mid
) == mid
) {
665 /****************************************************************************
666 Set a flag as an unlock request affects one of our pending locks.
667 *****************************************************************************/
669 static void received_unlock_msg(struct messaging_context
*msg
,
672 struct server_id server_id
,
675 DEBUG(10,("received_unlock_msg\n"));
676 process_blocking_lock_queue();
679 /****************************************************************************
680 Process the blocking lock queue. Note that this is only called as root.
681 *****************************************************************************/
683 static void process_blocking_lock_queue(void)
685 struct timeval tv_curr
= timeval_current();
686 blocking_lock_record
*blr
, *next
= NULL
;
687 BOOL recalc_timeout
= False
;
690 * Go through the queue and see if we can get any of the locks.
693 for (blr
= blocking_lock_queue
; blr
; blr
= next
) {
694 connection_struct
*conn
= NULL
;
696 files_struct
*fsp
= NULL
;
701 * Ensure we don't have any old chain_fsp values
708 conn
= conn_find(SVAL(blr
->inbuf
,smb_tid
));
709 vuid
= (lp_security() == SEC_SHARE
) ? UID_FIELD_INVALID
:
710 SVAL(blr
->inbuf
,smb_uid
);
712 DEBUG(5,("process_blocking_lock_queue: examining pending lock fnum = %d for file %s\n",
713 fsp
->fnum
, fsp
->fsp_name
));
715 if (!timeval_is_zero(&blr
->expire_time
) && timeval_compare(&blr
->expire_time
, &tv_curr
) <= 0) {
716 struct byte_range_lock
*br_lck
= brl_get_locks(NULL
, fsp
);
719 * Lock expired - throw away all previously
720 * obtained locks and return lock error.
724 DEBUG(5,("process_blocking_lock_queue: pending lock fnum = %d for file %s timed out.\n",
725 fsp
->fnum
, fsp
->fsp_name
));
727 brl_lock_cancel(br_lck
,
736 blocking_lock_reply_error(blr
,NT_STATUS_FILE_LOCK_CONFLICT
);
737 DLIST_REMOVE(blocking_lock_queue
, blr
);
738 free_blocking_lock_record(blr
);
739 recalc_timeout
= True
;
743 if(!change_to_user(conn
,vuid
)) {
744 struct byte_range_lock
*br_lck
= brl_get_locks(NULL
, fsp
);
747 * Remove the entry and return an error to the client.
751 brl_lock_cancel(br_lck
,
760 DEBUG(0,("process_blocking_lock_queue: Unable to become user vuid=%d.\n",
762 blocking_lock_reply_error(blr
,NT_STATUS_ACCESS_DENIED
);
763 DLIST_REMOVE(blocking_lock_queue
, blr
);
764 free_blocking_lock_record(blr
);
765 recalc_timeout
= True
;
769 if(!set_current_service(conn
,SVAL(blr
->inbuf
,smb_flg
),True
)) {
770 struct byte_range_lock
*br_lck
= brl_get_locks(NULL
, fsp
);
773 * Remove the entry and return an error to the client.
777 brl_lock_cancel(br_lck
,
786 DEBUG(0,("process_blocking_lock_queue: Unable to become service Error was %s.\n", strerror(errno
) ));
787 blocking_lock_reply_error(blr
,NT_STATUS_ACCESS_DENIED
);
788 DLIST_REMOVE(blocking_lock_queue
, blr
);
789 free_blocking_lock_record(blr
);
790 recalc_timeout
= True
;
791 change_to_root_user();
796 * Go through the remaining locks and try and obtain them.
797 * The call returns True if all locks were obtained successfully
798 * and False if we still need to wait.
801 if(blocking_lock_record_process(blr
)) {
802 struct byte_range_lock
*br_lck
= brl_get_locks(NULL
, fsp
);
805 brl_lock_cancel(br_lck
,
814 DLIST_REMOVE(blocking_lock_queue
, blr
);
815 free_blocking_lock_record(blr
);
816 recalc_timeout
= True
;
818 change_to_root_user();
821 if (recalc_timeout
) {
822 recalc_brl_timeout();
826 /****************************************************************************
827 Handle a cancel message. Lock already moved onto the cancel queue.
828 *****************************************************************************/
830 #define MSG_BLOCKING_LOCK_CANCEL_SIZE (sizeof(blocking_lock_record *) + sizeof(NTSTATUS))
832 static void process_blocking_lock_cancel_message(struct messaging_context
*ctx
,
835 struct server_id server_id
,
839 const char *msg
= (const char *)data
->data
;
840 blocking_lock_record
*blr
;
842 if (data
->data
== NULL
) {
843 smb_panic("process_blocking_lock_cancel_message: null msg");
846 if (data
->length
!= MSG_BLOCKING_LOCK_CANCEL_SIZE
) {
847 DEBUG(0, ("process_blocking_lock_cancel_message: "
848 "Got invalid msg len %d\n", (int)data
->length
));
849 smb_panic("process_blocking_lock_cancel_message: bad msg");
852 memcpy(&blr
, msg
, sizeof(blr
));
853 memcpy(&err
, &msg
[sizeof(blr
)], sizeof(NTSTATUS
));
855 DEBUG(10,("process_blocking_lock_cancel_message: returning error %s\n",
858 blocking_lock_reply_error(blr
, err
);
859 DLIST_REMOVE(blocking_lock_cancelled_queue
, blr
);
860 free_blocking_lock_record(blr
);
863 /****************************************************************************
864 Send ourselves a blocking lock cancelled message. Handled asynchronously above.
865 *****************************************************************************/
867 BOOL
blocking_lock_cancel(files_struct
*fsp
,
871 enum brl_flavour lock_flav
,
872 unsigned char locktype
,
875 static BOOL initialized
;
876 char msg
[MSG_BLOCKING_LOCK_CANCEL_SIZE
];
877 blocking_lock_record
*blr
;
880 /* Register our message. */
881 messaging_register(smbd_messaging_context(), NULL
,
882 MSG_SMB_BLOCKING_LOCK_CANCEL
,
883 process_blocking_lock_cancel_message
);
888 for (blr
= blocking_lock_queue
; blr
; blr
= blr
->next
) {
889 if (fsp
== blr
->fsp
&&
890 lock_pid
== blr
->lock_pid
&&
891 offset
== blr
->offset
&&
892 count
== blr
->count
&&
893 lock_flav
== blr
->lock_flav
) {
902 /* Check the flags are right. */
903 if (blr
->com_type
== SMBlockingX
&&
904 (locktype
& LOCKING_ANDX_LARGE_FILES
) !=
905 (CVAL(blr
->inbuf
,smb_vwv3
) & LOCKING_ANDX_LARGE_FILES
)) {
909 /* Move to cancelled queue. */
910 DLIST_REMOVE(blocking_lock_queue
, blr
);
911 DLIST_ADD(blocking_lock_cancelled_queue
, blr
);
913 /* Create the message. */
914 memcpy(msg
, &blr
, sizeof(blr
));
915 memcpy(&msg
[sizeof(blr
)], &err
, sizeof(NTSTATUS
));
917 messaging_send_buf(smbd_messaging_context(), procid_self(),
918 MSG_SMB_BLOCKING_LOCK_CANCEL
,
919 (uint8
*)&msg
, sizeof(msg
));