2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1998 - 2001
6 Copyright (C) Volker Lendecke 2005
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #define DBGC_CLASS DBGC_LOCKING
25 /* Current number of oplocks we have outstanding. */
26 static int32 exclusive_oplocks_open
= 0;
27 static int32 level_II_oplocks_open
= 0;
28 BOOL global_client_failed_oplock_break
= False
;
30 extern uint32 global_client_caps
;
31 extern int smb_read_error
;
33 static struct kernel_oplocks
*koplocks
;
35 /****************************************************************************
36 Get the number of current exclusive oplocks.
37 ****************************************************************************/
39 int32
get_number_of_exclusive_open_oplocks(void)
41 return exclusive_oplocks_open
;
44 /****************************************************************************
45 Return True if an oplock message is pending.
46 ****************************************************************************/
48 BOOL
oplock_message_waiting(fd_set
*fds
)
50 if (koplocks
&& koplocks
->msg_waiting(fds
)) {
57 /****************************************************************************
58 Find out if there are any kernel oplock messages waiting and process them
59 if so. pfds is the fd_set from the main select loop (which contains any
60 kernel oplock fd if that's what the system uses (IRIX). If may be NULL if
61 we're calling this in a shutting down state.
62 ****************************************************************************/
64 void process_kernel_oplocks(struct messaging_context
*msg_ctx
, fd_set
*pfds
)
67 * We need to check for kernel oplocks before going into the select
68 * here, as the EINTR generated by the linux kernel oplock may have
69 * already been eaten. JRA.
76 while (koplocks
->msg_waiting(pfds
)) {
78 char msg
[MSG_SMB_KERNEL_BREAK_SIZE
];
80 fsp
= koplocks
->receive_message(pfds
);
83 DEBUG(3, ("Kernel oplock message announced, but none "
88 /* Put the kernel break info into the message. */
89 push_file_id_16(msg
, &fsp
->file_id
);
90 SIVAL(msg
,16,fsp
->fh
->gen_id
);
92 /* Don't need to be root here as we're only ever
93 sending to ourselves. */
95 messaging_send_buf(msg_ctx
, procid_self(),
97 (uint8
*)&msg
, MSG_SMB_KERNEL_BREAK_SIZE
);
101 /****************************************************************************
102 Attempt to set an oplock on a file. Always succeeds if kernel oplocks are
103 disabled (just sets flags). Returns True if oplock set.
104 ****************************************************************************/
106 BOOL
set_file_oplock(files_struct
*fsp
, int oplock_type
)
108 if (koplocks
&& !koplocks
->set_oplock(fsp
, oplock_type
)) {
112 fsp
->oplock_type
= oplock_type
;
113 fsp
->sent_oplock_break
= NO_BREAK_SENT
;
114 if (oplock_type
== LEVEL_II_OPLOCK
) {
115 level_II_oplocks_open
++;
117 exclusive_oplocks_open
++;
120 DEBUG(5,("set_file_oplock: granted oplock on file %s, %s/%lu, "
121 "tv_sec = %x, tv_usec = %x\n",
122 fsp
->fsp_name
, file_id_string_tos(&fsp
->file_id
),
123 fsp
->fh
->gen_id
, (int)fsp
->open_time
.tv_sec
,
124 (int)fsp
->open_time
.tv_usec
));
129 /****************************************************************************
130 Attempt to release an oplock on a file. Decrements oplock count.
131 ****************************************************************************/
133 void release_file_oplock(files_struct
*fsp
)
135 if ((fsp
->oplock_type
!= NO_OPLOCK
) &&
136 (fsp
->oplock_type
!= FAKE_LEVEL_II_OPLOCK
) &&
138 koplocks
->release_oplock(fsp
);
141 if (fsp
->oplock_type
== LEVEL_II_OPLOCK
) {
142 level_II_oplocks_open
--;
143 } else if (EXCLUSIVE_OPLOCK_TYPE(fsp
->oplock_type
)) {
144 exclusive_oplocks_open
--;
147 SMB_ASSERT(exclusive_oplocks_open
>=0);
148 SMB_ASSERT(level_II_oplocks_open
>=0);
150 fsp
->oplock_type
= NO_OPLOCK
;
151 fsp
->sent_oplock_break
= NO_BREAK_SENT
;
153 flush_write_cache(fsp
, OPLOCK_RELEASE_FLUSH
);
155 TALLOC_FREE(fsp
->oplock_timeout
);
158 /****************************************************************************
159 Attempt to downgrade an oplock on a file. Doesn't decrement oplock count.
160 ****************************************************************************/
162 static void downgrade_file_oplock(files_struct
*fsp
)
165 koplocks
->release_oplock(fsp
);
167 fsp
->oplock_type
= LEVEL_II_OPLOCK
;
168 exclusive_oplocks_open
--;
169 level_II_oplocks_open
++;
170 fsp
->sent_oplock_break
= NO_BREAK_SENT
;
173 /****************************************************************************
174 Remove a file oplock. Copes with level II and exclusive.
175 Locks then unlocks the share mode lock. Client can decide to go directly
176 to none even if a "break-to-level II" was sent.
177 ****************************************************************************/
179 BOOL
remove_oplock(files_struct
*fsp
)
182 struct share_mode_lock
*lck
;
184 /* Remove the oplock flag from the sharemode. */
185 lck
= get_share_mode_lock(NULL
, fsp
->file_id
, NULL
, NULL
);
187 DEBUG(0,("remove_oplock: failed to lock share entry for "
188 "file %s\n", fsp
->fsp_name
));
191 ret
= remove_share_oplock(lck
, fsp
);
193 DEBUG(0,("remove_oplock: failed to remove share oplock for "
194 "file %s fnum %d, %s\n",
195 fsp
->fsp_name
, fsp
->fnum
, file_id_string_tos(&fsp
->file_id
)));
197 release_file_oplock(fsp
);
203 * Deal with a reply when a break-to-level II was sent.
205 BOOL
downgrade_oplock(files_struct
*fsp
)
208 struct share_mode_lock
*lck
;
210 lck
= get_share_mode_lock(NULL
, fsp
->file_id
, NULL
, NULL
);
212 DEBUG(0,("downgrade_oplock: failed to lock share entry for "
213 "file %s\n", fsp
->fsp_name
));
216 ret
= downgrade_share_oplock(lck
, fsp
);
218 DEBUG(0,("downgrade_oplock: failed to downgrade share oplock "
219 "for file %s fnum %d, file_id %s\n",
220 fsp
->fsp_name
, fsp
->fnum
, file_id_string_tos(&fsp
->file_id
)));
223 downgrade_file_oplock(fsp
);
228 /****************************************************************************
229 Return the fd (if any) used for receiving oplock notifications.
230 ****************************************************************************/
232 int oplock_notify_fd(void)
235 return koplocks
->notification_fd
;
241 /****************************************************************************
242 Set up an oplock break message.
243 ****************************************************************************/
245 static char *new_break_smb_message(TALLOC_CTX
*mem_ctx
,
246 files_struct
*fsp
, uint8 cmd
)
248 char *result
= TALLOC_ARRAY(mem_ctx
, char, smb_size
+ 8*2 + 0);
250 if (result
== NULL
) {
251 DEBUG(0, ("talloc failed\n"));
255 memset(result
,'\0',smb_size
);
256 set_message(result
,8,0,True
);
257 SCVAL(result
,smb_com
,SMBlockingX
);
258 SSVAL(result
,smb_tid
,fsp
->conn
->cnum
);
259 SSVAL(result
,smb_pid
,0xFFFF);
260 SSVAL(result
,smb_uid
,0);
261 SSVAL(result
,smb_mid
,0xFFFF);
262 SCVAL(result
,smb_vwv0
,0xFF);
263 SSVAL(result
,smb_vwv2
,fsp
->fnum
);
264 SCVAL(result
,smb_vwv3
,LOCKING_ANDX_OPLOCK_RELEASE
);
265 SCVAL(result
,smb_vwv3
+1,cmd
);
269 /****************************************************************************
270 Function to do the waiting before sending a local break.
271 ****************************************************************************/
273 static void wait_before_sending_break(void)
275 long wait_time
= (long)lp_oplock_break_wait_time();
278 smb_msleep(wait_time
);
282 /****************************************************************************
283 Ensure that we have a valid oplock.
284 ****************************************************************************/
286 static files_struct
*initial_break_processing(struct file_id id
, unsigned long file_id
)
288 files_struct
*fsp
= NULL
;
290 if( DEBUGLVL( 3 ) ) {
291 dbgtext( "initial_break_processing: called for %s/%u\n",
292 file_id_string_tos(&id
), (int)file_id
);
293 dbgtext( "Current oplocks_open (exclusive = %d, levelII = %d)\n",
294 exclusive_oplocks_open
, level_II_oplocks_open
);
298 * We need to search the file open table for the
299 * entry containing this dev and inode, and ensure
300 * we have an oplock on it.
303 fsp
= file_find_dif(id
, file_id
);
306 /* The file could have been closed in the meantime - return success. */
307 if( DEBUGLVL( 3 ) ) {
308 dbgtext( "initial_break_processing: cannot find open file with " );
309 dbgtext( "file_id %s gen_id = %lu", file_id_string_tos(&id
), file_id
);
310 dbgtext( "allowing break to succeed.\n" );
315 /* Ensure we have an oplock on the file */
318 * There is a potential race condition in that an oplock could
319 * have been broken due to another udp request, and yet there are
320 * still oplock break messages being sent in the udp message
321 * queue for this file. So return true if we don't have an oplock,
322 * as we may have just freed it.
325 if(fsp
->oplock_type
== NO_OPLOCK
) {
326 if( DEBUGLVL( 3 ) ) {
327 dbgtext( "initial_break_processing: file %s ", fsp
->fsp_name
);
328 dbgtext( "(file_id = %s gen_id = %lu) has no oplock.\n",
329 file_id_string_tos(&id
), fsp
->fh
->gen_id
);
330 dbgtext( "Allowing break to succeed regardless.\n" );
338 static void oplock_timeout_handler(struct event_context
*ctx
,
339 struct timed_event
*te
,
340 const struct timeval
*now
,
343 files_struct
*fsp
= (files_struct
*)private_data
;
345 /* Remove the timed event handler. */
346 TALLOC_FREE(fsp
->oplock_timeout
);
347 DEBUG(0, ("Oplock break failed for file %s -- replying anyway\n", fsp
->fsp_name
));
348 global_client_failed_oplock_break
= True
;
350 reply_to_oplock_break_requests(fsp
);
353 /*******************************************************************
354 Add a timeout handler waiting for the client reply.
355 *******************************************************************/
357 static void add_oplock_timeout_handler(files_struct
*fsp
)
359 if (fsp
->oplock_timeout
!= NULL
) {
360 DEBUG(0, ("Logic problem -- have an oplock event hanging "
364 fsp
->oplock_timeout
=
365 event_add_timed(smbd_event_context(), NULL
,
366 timeval_current_ofs(OPLOCK_BREAK_TIMEOUT
, 0),
367 "oplock_timeout_handler",
368 oplock_timeout_handler
, fsp
);
370 if (fsp
->oplock_timeout
== NULL
) {
371 DEBUG(0, ("Could not add oplock timeout handler\n"));
375 /*******************************************************************
376 This handles the case of a write triggering a break to none
377 message on a level2 oplock.
378 When we get this message we may be in any of three states :
379 NO_OPLOCK, LEVEL_II, FAKE_LEVEL2. We only send a message to
380 the client for LEVEL2.
381 *******************************************************************/
383 static void process_oplock_async_level2_break_message(struct messaging_context
*msg_ctx
,
386 struct server_id src
,
389 struct share_mode_entry msg
;
394 if (data
->data
== NULL
) {
395 DEBUG(0, ("Got NULL buffer\n"));
399 if (data
->length
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
400 DEBUG(0, ("Got invalid msg len %d\n", (int)data
->length
));
404 /* De-linearize incoming message. */
405 message_to_share_mode_entry(&msg
, (char *)data
->data
);
407 DEBUG(10, ("Got oplock async level 2 break message from pid %d: %s/%lu\n",
408 (int)procid_to_pid(&src
), file_id_string_tos(&msg
.id
), msg
.share_file_id
));
410 fsp
= initial_break_processing(msg
.id
, msg
.share_file_id
);
413 /* We hit a race here. Break messages are sent, and before we
414 * get to process this message, we have closed the file.
415 * No need to reply as this is an async message. */
416 DEBUG(3, ("process_oplock_async_level2_break_message: Did not find fsp, ignoring\n"));
420 if (fsp
->oplock_type
== NO_OPLOCK
) {
421 /* We already got a "break to none" message and we've handled it.
423 DEBUG(3, ("process_oplock_async_level2_break_message: already broken to none, ignoring.\n"));
427 if (fsp
->oplock_type
== FAKE_LEVEL_II_OPLOCK
) {
428 /* Don't tell the client, just downgrade. */
429 DEBUG(3, ("process_oplock_async_level2_break_message: downgrading fake level 2 oplock.\n"));
434 /* Ensure we're really at level2 state. */
435 SMB_ASSERT(fsp
->oplock_type
== LEVEL_II_OPLOCK
);
437 /* Now send a break to none message to our client. */
439 break_msg
= new_break_smb_message(NULL
, fsp
, OPLOCKLEVEL_NONE
);
440 if (break_msg
== NULL
) {
441 exit_server("Could not talloc break_msg\n");
444 /* Need to wait before sending a break message if we sent ourselves this message. */
445 if (procid_to_pid(&src
) == sys_getpid()) {
446 wait_before_sending_break();
449 /* Save the server smb signing state. */
450 sign_state
= srv_oplock_set_signing(False
);
453 if (!send_smb(smbd_server_fd(), break_msg
)) {
454 exit_server_cleanly("oplock_break: send_smb failed.");
457 /* Restore the sign state to what it was. */
458 srv_oplock_set_signing(sign_state
);
460 TALLOC_FREE(break_msg
);
462 /* Async level2 request, don't send a reply, just remove the oplock. */
466 /*******************************************************************
467 This handles the generic oplock break message from another smbd.
468 *******************************************************************/
470 static void process_oplock_break_message(struct messaging_context
*msg_ctx
,
473 struct server_id src
,
476 struct share_mode_entry msg
;
479 BOOL break_to_level2
= False
;
482 if (data
->data
== NULL
) {
483 DEBUG(0, ("Got NULL buffer\n"));
487 if (data
->length
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
488 DEBUG(0, ("Got invalid msg len %d\n", (int)data
->length
));
492 /* De-linearize incoming message. */
493 message_to_share_mode_entry(&msg
, (char *)data
->data
);
495 DEBUG(10, ("Got oplock break message from pid %d: %s/%lu\n",
496 (int)procid_to_pid(&src
), file_id_string_tos(&msg
.id
), msg
.share_file_id
));
498 fsp
= initial_break_processing(msg
.id
, msg
.share_file_id
);
501 /* a We hit race here. Break messages are sent, and before we
502 * get to process this message, we have closed the file. Reply
503 * with 'ok, oplock broken' */
504 DEBUG(3, ("Did not find fsp\n"));
506 /* We just send the same message back. */
507 messaging_send_buf(msg_ctx
, src
, MSG_SMB_BREAK_RESPONSE
,
509 MSG_SMB_SHARE_MODE_ENTRY_SIZE
);
513 if (fsp
->sent_oplock_break
!= NO_BREAK_SENT
) {
514 /* Remember we have to inform the requesting PID when the
517 ADD_TO_ARRAY(NULL
, struct share_mode_entry
, msg
,
518 &fsp
->pending_break_messages
,
519 &fsp
->num_pending_break_messages
);
523 if (EXCLUSIVE_OPLOCK_TYPE(msg
.op_type
) &&
524 !EXCLUSIVE_OPLOCK_TYPE(fsp
->oplock_type
)) {
525 DEBUG(3, ("Already downgraded oplock on %s: %s\n",
526 file_id_string_tos(&fsp
->file_id
),
528 /* We just send the same message back. */
529 messaging_send_buf(msg_ctx
, src
, MSG_SMB_BREAK_RESPONSE
,
531 MSG_SMB_SHARE_MODE_ENTRY_SIZE
);
535 if ((global_client_caps
& CAP_LEVEL_II_OPLOCKS
) &&
536 !(msg
.op_type
& FORCE_OPLOCK_BREAK_TO_NONE
) &&
537 !koplocks
&& /* NOTE: we force levelII off for kernel oplocks -
538 * this will change when it is supported */
539 lp_level2_oplocks(SNUM(fsp
->conn
))) {
540 break_to_level2
= True
;
543 break_msg
= new_break_smb_message(NULL
, fsp
, break_to_level2
?
544 OPLOCKLEVEL_II
: OPLOCKLEVEL_NONE
);
545 if (break_msg
== NULL
) {
546 exit_server("Could not talloc break_msg\n");
549 /* Need to wait before sending a break message if we sent ourselves this message. */
550 if (procid_to_pid(&src
) == sys_getpid()) {
551 wait_before_sending_break();
554 /* Save the server smb signing state. */
555 sign_state
= srv_oplock_set_signing(False
);
558 if (!send_smb(smbd_server_fd(), break_msg
)) {
559 exit_server_cleanly("oplock_break: send_smb failed.");
562 /* Restore the sign state to what it was. */
563 srv_oplock_set_signing(sign_state
);
565 TALLOC_FREE(break_msg
);
567 fsp
->sent_oplock_break
= break_to_level2
? LEVEL_II_BREAK_SENT
:BREAK_TO_NONE_SENT
;
570 ADD_TO_ARRAY(NULL
, struct share_mode_entry
, msg
,
571 &fsp
->pending_break_messages
,
572 &fsp
->num_pending_break_messages
);
574 add_oplock_timeout_handler(fsp
);
577 /*******************************************************************
578 This handles the kernel oplock break message.
579 *******************************************************************/
581 static void process_kernel_oplock_break(struct messaging_context
*msg_ctx
,
584 struct server_id src
,
588 unsigned long file_id
;
593 if (data
->data
== NULL
) {
594 DEBUG(0, ("Got NULL buffer\n"));
598 if (data
->length
!= MSG_SMB_KERNEL_BREAK_SIZE
) {
599 DEBUG(0, ("Got invalid msg len %d\n", (int)data
->length
));
603 /* Pull the data from the message. */
604 pull_file_id_16((char *)data
->data
, &id
);
605 file_id
= (unsigned long)IVAL(data
->data
, 16);
607 DEBUG(10, ("Got kernel oplock break message from pid %d: %s/%u\n",
608 (int)procid_to_pid(&src
), file_id_string_tos(&id
),
609 (unsigned int)file_id
));
611 fsp
= initial_break_processing(id
, file_id
);
614 DEBUG(3, ("Got a kernel oplock break message for a file "
615 "I don't know about\n"));
619 if (fsp
->sent_oplock_break
!= NO_BREAK_SENT
) {
620 /* This is ok, kernel oplocks come in completely async */
621 DEBUG(3, ("Got a kernel oplock request while waiting for a "
626 break_msg
= new_break_smb_message(NULL
, fsp
, OPLOCKLEVEL_NONE
);
627 if (break_msg
== NULL
) {
628 exit_server("Could not talloc break_msg\n");
631 /* Save the server smb signing state. */
632 sign_state
= srv_oplock_set_signing(False
);
635 if (!send_smb(smbd_server_fd(), break_msg
)) {
636 exit_server_cleanly("oplock_break: send_smb failed.");
639 /* Restore the sign state to what it was. */
640 srv_oplock_set_signing(sign_state
);
642 TALLOC_FREE(break_msg
);
644 fsp
->sent_oplock_break
= BREAK_TO_NONE_SENT
;
646 add_oplock_timeout_handler(fsp
);
649 void reply_to_oplock_break_requests(files_struct
*fsp
)
653 for (i
=0; i
<fsp
->num_pending_break_messages
; i
++) {
654 struct share_mode_entry
*e
= &fsp
->pending_break_messages
[i
];
655 char msg
[MSG_SMB_SHARE_MODE_ENTRY_SIZE
];
657 share_mode_entry_to_message(msg
, e
);
659 messaging_send_buf(smbd_messaging_context(), e
->pid
,
660 MSG_SMB_BREAK_RESPONSE
,
662 MSG_SMB_SHARE_MODE_ENTRY_SIZE
);
665 SAFE_FREE(fsp
->pending_break_messages
);
666 fsp
->num_pending_break_messages
= 0;
667 if (fsp
->oplock_timeout
!= NULL
) {
668 /* Remove the timed event handler. */
669 TALLOC_FREE(fsp
->oplock_timeout
);
670 fsp
->oplock_timeout
= NULL
;
675 static void process_oplock_break_response(struct messaging_context
*msg_ctx
,
678 struct server_id src
,
681 struct share_mode_entry msg
;
683 if (data
->data
== NULL
) {
684 DEBUG(0, ("Got NULL buffer\n"));
688 if (data
->length
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
689 DEBUG(0, ("Got invalid msg len %u\n",
690 (unsigned int)data
->length
));
694 /* De-linearize incoming message. */
695 message_to_share_mode_entry(&msg
, (char *)data
->data
);
697 DEBUG(10, ("Got oplock break response from pid %d: %s/%lu mid %u\n",
698 (int)procid_to_pid(&src
), file_id_string_tos(&msg
.id
), msg
.share_file_id
,
699 (unsigned int)msg
.op_mid
));
701 /* Here's the hack from open.c, store the mid in the 'port' field */
702 schedule_deferred_open_smb_message(msg
.op_mid
);
705 static void process_open_retry_message(struct messaging_context
*msg_ctx
,
708 struct server_id src
,
711 struct share_mode_entry msg
;
713 if (data
->data
== NULL
) {
714 DEBUG(0, ("Got NULL buffer\n"));
718 if (data
->length
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
719 DEBUG(0, ("Got invalid msg len %d\n", (int)data
->length
));
723 /* De-linearize incoming message. */
724 message_to_share_mode_entry(&msg
, (char *)data
->data
);
726 DEBUG(10, ("Got open retry msg from pid %d: %s mid %u\n",
727 (int)procid_to_pid(&src
), file_id_string_tos(&msg
.id
),
728 (unsigned int)msg
.op_mid
));
730 schedule_deferred_open_smb_message(msg
.op_mid
);
733 /****************************************************************************
734 This function is called on any file modification or lock request. If a file
735 is level 2 oplocked then it must tell all other level 2 holders to break to
737 ****************************************************************************/
739 void release_level_2_oplocks_on_change(files_struct
*fsp
)
742 struct share_mode_lock
*lck
;
745 * If this file is level II oplocked then we need
746 * to grab the shared memory lock and inform all
747 * other files with a level II lock that they need
748 * to flush their read caches. We keep the lock over
749 * the shared memory area whilst doing this.
752 if (!LEVEL_II_OPLOCK_TYPE(fsp
->oplock_type
))
755 lck
= get_share_mode_lock(NULL
, fsp
->file_id
, NULL
, NULL
);
757 DEBUG(0,("release_level_2_oplocks_on_change: failed to lock "
758 "share mode entry for file %s.\n", fsp
->fsp_name
));
762 DEBUG(10,("release_level_2_oplocks_on_change: num_share_modes = %d\n",
763 lck
->num_share_modes
));
765 for(i
= 0; i
< lck
->num_share_modes
; i
++) {
766 struct share_mode_entry
*share_entry
= &lck
->share_modes
[i
];
767 char msg
[MSG_SMB_SHARE_MODE_ENTRY_SIZE
];
769 if (!is_valid_share_mode_entry(share_entry
)) {
774 * As there could have been multiple writes waiting at the
775 * lock_share_entry gate we may not be the first to
776 * enter. Hence the state of the op_types in the share mode
777 * entries may be partly NO_OPLOCK and partly LEVEL_II or FAKE_LEVEL_II
778 * oplock. It will do no harm to re-send break messages to
779 * those smbd's that are still waiting their turn to remove
780 * their LEVEL_II state, and also no harm to ignore existing
781 * NO_OPLOCK states. JRA.
784 DEBUG(10,("release_level_2_oplocks_on_change: "
785 "share_entry[%i]->op_type == %d\n",
786 i
, share_entry
->op_type
));
788 if (share_entry
->op_type
== NO_OPLOCK
) {
793 if (EXCLUSIVE_OPLOCK_TYPE(share_entry
->op_type
)) {
794 DEBUG(0,("release_level_2_oplocks_on_change: PANIC. "
795 "share mode entry %d is an exlusive "
801 share_mode_entry_to_message(msg
, share_entry
);
803 messaging_send_buf(smbd_messaging_context(), share_entry
->pid
,
804 MSG_SMB_ASYNC_LEVEL2_BREAK
,
806 MSG_SMB_SHARE_MODE_ENTRY_SIZE
);
809 /* We let the message receivers handle removing the oplock state
810 in the share mode lock db. */
815 /****************************************************************************
816 Linearize a share mode entry struct to an internal oplock break message.
817 ****************************************************************************/
819 void share_mode_entry_to_message(char *msg
, struct share_mode_entry
*e
)
821 SIVAL(msg
,0,(uint32
)e
->pid
.pid
);
822 SSVAL(msg
,4,e
->op_mid
);
823 SSVAL(msg
,6,e
->op_type
);
824 SIVAL(msg
,8,e
->access_mask
);
825 SIVAL(msg
,12,e
->share_access
);
826 SIVAL(msg
,16,e
->private_options
);
827 SIVAL(msg
,20,(uint32
)e
->time
.tv_sec
);
828 SIVAL(msg
,24,(uint32
)e
->time
.tv_usec
);
829 push_file_id_16(msg
+28, &e
->id
);
830 SIVAL(msg
,44,e
->share_file_id
);
831 SIVAL(msg
,48,e
->uid
);
832 SSVAL(msg
,52,e
->flags
);
833 #ifdef CLUSTER_SUPPORT
834 SIVAL(msg
,54,e
->pid
.vnn
);
838 /****************************************************************************
839 De-linearize an internal oplock break message to a share mode entry struct.
840 ****************************************************************************/
842 void message_to_share_mode_entry(struct share_mode_entry
*e
, char *msg
)
844 e
->pid
.pid
= (pid_t
)IVAL(msg
,0);
845 e
->op_mid
= SVAL(msg
,4);
846 e
->op_type
= SVAL(msg
,6);
847 e
->access_mask
= IVAL(msg
,8);
848 e
->share_access
= IVAL(msg
,12);
849 e
->private_options
= IVAL(msg
,16);
850 e
->time
.tv_sec
= (time_t)IVAL(msg
,20);
851 e
->time
.tv_usec
= (int)IVAL(msg
,24);
852 pull_file_id_16(msg
+28, &e
->id
);
853 e
->share_file_id
= (unsigned long)IVAL(msg
,44);
854 e
->uid
= (uint32
)IVAL(msg
,48);
855 e
->flags
= (uint16
)SVAL(msg
,52);
856 #ifdef CLUSTER_SUPPORT
857 e
->pid
.vnn
= IVAL(msg
,54);
861 /****************************************************************************
862 Setup oplocks for this process.
863 ****************************************************************************/
865 BOOL
init_oplocks(struct messaging_context
*msg_ctx
)
867 DEBUG(3,("init_oplocks: initializing messages.\n"));
869 messaging_register(msg_ctx
, NULL
, MSG_SMB_BREAK_REQUEST
,
870 process_oplock_break_message
);
871 messaging_register(msg_ctx
, NULL
, MSG_SMB_ASYNC_LEVEL2_BREAK
,
872 process_oplock_async_level2_break_message
);
873 messaging_register(msg_ctx
, NULL
, MSG_SMB_BREAK_RESPONSE
,
874 process_oplock_break_response
);
875 messaging_register(msg_ctx
, NULL
, MSG_SMB_KERNEL_BREAK
,
876 process_kernel_oplock_break
);
877 messaging_register(msg_ctx
, NULL
, MSG_SMB_OPEN_RETRY
,
878 process_open_retry_message
);
880 if (lp_kernel_oplocks()) {
881 #if HAVE_KERNEL_OPLOCKS_IRIX
882 koplocks
= irix_init_kernel_oplocks();
883 #elif HAVE_KERNEL_OPLOCKS_LINUX
884 koplocks
= linux_init_kernel_oplocks();