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
;
32 static struct kernel_oplocks
*koplocks
;
34 /****************************************************************************
35 Get the number of current exclusive oplocks.
36 ****************************************************************************/
38 int32
get_number_of_exclusive_open_oplocks(void)
40 return exclusive_oplocks_open
;
43 /****************************************************************************
44 Return True if an oplock message is pending.
45 ****************************************************************************/
47 bool oplock_message_waiting(fd_set
*fds
)
49 if (koplocks
&& koplocks
->msg_waiting(fds
)) {
56 /****************************************************************************
57 Find out if there are any kernel oplock messages waiting and process them
58 if so. pfds is the fd_set from the main select loop (which contains any
59 kernel oplock fd if that's what the system uses (IRIX). If may be NULL if
60 we're calling this in a shutting down state.
61 ****************************************************************************/
63 void process_kernel_oplocks(struct messaging_context
*msg_ctx
, fd_set
*pfds
)
66 * We need to check for kernel oplocks before going into the select
67 * here, as the EINTR generated by the linux kernel oplock may have
68 * already been eaten. JRA.
75 while (koplocks
->msg_waiting(pfds
)) {
77 char msg
[MSG_SMB_KERNEL_BREAK_SIZE
];
79 fsp
= koplocks
->receive_message(pfds
);
82 DEBUG(3, ("Kernel oplock message announced, but none "
87 /* Put the kernel break info into the message. */
88 push_file_id_16(msg
, &fsp
->file_id
);
89 SIVAL(msg
,16,fsp
->fh
->gen_id
);
91 /* Don't need to be root here as we're only ever
92 sending to ourselves. */
94 messaging_send_buf(msg_ctx
, procid_self(),
96 (uint8
*)&msg
, MSG_SMB_KERNEL_BREAK_SIZE
);
100 /****************************************************************************
101 Attempt to set an oplock on a file. Always succeeds if kernel oplocks are
102 disabled (just sets flags). Returns True if oplock set.
103 ****************************************************************************/
105 bool set_file_oplock(files_struct
*fsp
, int oplock_type
)
107 if (koplocks
&& !koplocks
->set_oplock(fsp
, oplock_type
)) {
111 fsp
->oplock_type
= oplock_type
;
112 fsp
->sent_oplock_break
= NO_BREAK_SENT
;
113 if (oplock_type
== LEVEL_II_OPLOCK
) {
114 level_II_oplocks_open
++;
116 exclusive_oplocks_open
++;
119 DEBUG(5,("set_file_oplock: granted oplock on file %s, %s/%lu, "
120 "tv_sec = %x, tv_usec = %x\n",
121 fsp
->fsp_name
, file_id_string_tos(&fsp
->file_id
),
122 fsp
->fh
->gen_id
, (int)fsp
->open_time
.tv_sec
,
123 (int)fsp
->open_time
.tv_usec
));
128 /****************************************************************************
129 Attempt to release an oplock on a file. Decrements oplock count.
130 ****************************************************************************/
132 void release_file_oplock(files_struct
*fsp
)
134 if ((fsp
->oplock_type
!= NO_OPLOCK
) &&
135 (fsp
->oplock_type
!= FAKE_LEVEL_II_OPLOCK
) &&
137 koplocks
->release_oplock(fsp
);
140 if (fsp
->oplock_type
== LEVEL_II_OPLOCK
) {
141 level_II_oplocks_open
--;
142 } else if (EXCLUSIVE_OPLOCK_TYPE(fsp
->oplock_type
)) {
143 exclusive_oplocks_open
--;
146 SMB_ASSERT(exclusive_oplocks_open
>=0);
147 SMB_ASSERT(level_II_oplocks_open
>=0);
149 fsp
->oplock_type
= NO_OPLOCK
;
150 fsp
->sent_oplock_break
= NO_BREAK_SENT
;
152 flush_write_cache(fsp
, OPLOCK_RELEASE_FLUSH
);
154 TALLOC_FREE(fsp
->oplock_timeout
);
157 /****************************************************************************
158 Attempt to downgrade an oplock on a file. Doesn't decrement oplock count.
159 ****************************************************************************/
161 static void downgrade_file_oplock(files_struct
*fsp
)
164 koplocks
->release_oplock(fsp
);
166 fsp
->oplock_type
= LEVEL_II_OPLOCK
;
167 exclusive_oplocks_open
--;
168 level_II_oplocks_open
++;
169 fsp
->sent_oplock_break
= NO_BREAK_SENT
;
172 /****************************************************************************
173 Remove a file oplock. Copes with level II and exclusive.
174 Locks then unlocks the share mode lock. Client can decide to go directly
175 to none even if a "break-to-level II" was sent.
176 ****************************************************************************/
178 bool remove_oplock(files_struct
*fsp
)
181 struct share_mode_lock
*lck
;
183 /* Remove the oplock flag from the sharemode. */
184 lck
= get_share_mode_lock(talloc_tos(), fsp
->file_id
, NULL
, NULL
);
186 DEBUG(0,("remove_oplock: failed to lock share entry for "
187 "file %s\n", fsp
->fsp_name
));
190 ret
= remove_share_oplock(lck
, fsp
);
192 DEBUG(0,("remove_oplock: failed to remove share oplock for "
193 "file %s fnum %d, %s\n",
194 fsp
->fsp_name
, fsp
->fnum
, file_id_string_tos(&fsp
->file_id
)));
196 release_file_oplock(fsp
);
202 * Deal with a reply when a break-to-level II was sent.
204 bool downgrade_oplock(files_struct
*fsp
)
207 struct share_mode_lock
*lck
;
209 lck
= get_share_mode_lock(talloc_tos(), fsp
->file_id
, NULL
, NULL
);
211 DEBUG(0,("downgrade_oplock: failed to lock share entry for "
212 "file %s\n", fsp
->fsp_name
));
215 ret
= downgrade_share_oplock(lck
, fsp
);
217 DEBUG(0,("downgrade_oplock: failed to downgrade share oplock "
218 "for file %s fnum %d, file_id %s\n",
219 fsp
->fsp_name
, fsp
->fnum
, file_id_string_tos(&fsp
->file_id
)));
222 downgrade_file_oplock(fsp
);
227 /****************************************************************************
228 Return the fd (if any) used for receiving oplock notifications.
229 ****************************************************************************/
231 int oplock_notify_fd(void)
234 return koplocks
->notification_fd
;
240 /****************************************************************************
241 Set up an oplock break message.
242 ****************************************************************************/
244 static char *new_break_smb_message(TALLOC_CTX
*mem_ctx
,
245 files_struct
*fsp
, uint8 cmd
)
247 char *result
= TALLOC_ARRAY(mem_ctx
, char, smb_size
+ 8*2 + 0);
249 if (result
== NULL
) {
250 DEBUG(0, ("talloc failed\n"));
254 memset(result
,'\0',smb_size
);
255 srv_set_message(result
,8,0,true);
256 SCVAL(result
,smb_com
,SMBlockingX
);
257 SSVAL(result
,smb_tid
,fsp
->conn
->cnum
);
258 SSVAL(result
,smb_pid
,0xFFFF);
259 SSVAL(result
,smb_uid
,0);
260 SSVAL(result
,smb_mid
,0xFFFF);
261 SCVAL(result
,smb_vwv0
,0xFF);
262 SSVAL(result
,smb_vwv2
,fsp
->fnum
);
263 SCVAL(result
,smb_vwv3
,LOCKING_ANDX_OPLOCK_RELEASE
);
264 SCVAL(result
,smb_vwv3
+1,cmd
);
268 /****************************************************************************
269 Function to do the waiting before sending a local break.
270 ****************************************************************************/
272 static void wait_before_sending_break(void)
274 long wait_time
= (long)lp_oplock_break_wait_time();
277 smb_msleep(wait_time
);
281 /****************************************************************************
282 Ensure that we have a valid oplock.
283 ****************************************************************************/
285 static files_struct
*initial_break_processing(struct file_id id
, unsigned long file_id
)
287 files_struct
*fsp
= NULL
;
289 if( DEBUGLVL( 3 ) ) {
290 dbgtext( "initial_break_processing: called for %s/%u\n",
291 file_id_string_tos(&id
), (int)file_id
);
292 dbgtext( "Current oplocks_open (exclusive = %d, levelII = %d)\n",
293 exclusive_oplocks_open
, level_II_oplocks_open
);
297 * We need to search the file open table for the
298 * entry containing this dev and inode, and ensure
299 * we have an oplock on it.
302 fsp
= file_find_dif(id
, file_id
);
305 /* The file could have been closed in the meantime - return success. */
306 if( DEBUGLVL( 3 ) ) {
307 dbgtext( "initial_break_processing: cannot find open file with " );
308 dbgtext( "file_id %s gen_id = %lu", file_id_string_tos(&id
), file_id
);
309 dbgtext( "allowing break to succeed.\n" );
314 /* Ensure we have an oplock on the file */
317 * There is a potential race condition in that an oplock could
318 * have been broken due to another udp request, and yet there are
319 * still oplock break messages being sent in the udp message
320 * queue for this file. So return true if we don't have an oplock,
321 * as we may have just freed it.
324 if(fsp
->oplock_type
== NO_OPLOCK
) {
325 if( DEBUGLVL( 3 ) ) {
326 dbgtext( "initial_break_processing: file %s ", fsp
->fsp_name
);
327 dbgtext( "(file_id = %s gen_id = %lu) has no oplock.\n",
328 file_id_string_tos(&id
), fsp
->fh
->gen_id
);
329 dbgtext( "Allowing break to succeed regardless.\n" );
337 static void oplock_timeout_handler(struct event_context
*ctx
,
338 struct timed_event
*te
,
339 const struct timeval
*now
,
342 files_struct
*fsp
= (files_struct
*)private_data
;
344 /* Remove the timed event handler. */
345 TALLOC_FREE(fsp
->oplock_timeout
);
346 DEBUG(0, ("Oplock break failed for file %s -- replying anyway\n", fsp
->fsp_name
));
347 global_client_failed_oplock_break
= True
;
349 reply_to_oplock_break_requests(fsp
);
352 /*******************************************************************
353 Add a timeout handler waiting for the client reply.
354 *******************************************************************/
356 static void add_oplock_timeout_handler(files_struct
*fsp
)
358 if (fsp
->oplock_timeout
!= NULL
) {
359 DEBUG(0, ("Logic problem -- have an oplock event hanging "
363 fsp
->oplock_timeout
=
364 event_add_timed(smbd_event_context(), NULL
,
365 timeval_current_ofs(OPLOCK_BREAK_TIMEOUT
, 0),
366 "oplock_timeout_handler",
367 oplock_timeout_handler
, fsp
);
369 if (fsp
->oplock_timeout
== NULL
) {
370 DEBUG(0, ("Could not add oplock timeout handler\n"));
374 /*******************************************************************
375 This handles the case of a write triggering a break to none
376 message on a level2 oplock.
377 When we get this message we may be in any of three states :
378 NO_OPLOCK, LEVEL_II, FAKE_LEVEL2. We only send a message to
379 the client for LEVEL2.
380 *******************************************************************/
382 static void process_oplock_async_level2_break_message(struct messaging_context
*msg_ctx
,
385 struct server_id src
,
388 struct share_mode_entry msg
;
393 if (data
->data
== NULL
) {
394 DEBUG(0, ("Got NULL buffer\n"));
398 if (data
->length
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
399 DEBUG(0, ("Got invalid msg len %d\n", (int)data
->length
));
403 /* De-linearize incoming message. */
404 message_to_share_mode_entry(&msg
, (char *)data
->data
);
406 DEBUG(10, ("Got oplock async level 2 break message from pid %d: %s/%lu\n",
407 (int)procid_to_pid(&src
), file_id_string_tos(&msg
.id
), msg
.share_file_id
));
409 fsp
= initial_break_processing(msg
.id
, msg
.share_file_id
);
412 /* We hit a race here. Break messages are sent, and before we
413 * get to process this message, we have closed the file.
414 * No need to reply as this is an async message. */
415 DEBUG(3, ("process_oplock_async_level2_break_message: Did not find fsp, ignoring\n"));
419 if (fsp
->oplock_type
== NO_OPLOCK
) {
420 /* We already got a "break to none" message and we've handled it.
422 DEBUG(3, ("process_oplock_async_level2_break_message: already broken to none, ignoring.\n"));
426 if (fsp
->oplock_type
== FAKE_LEVEL_II_OPLOCK
) {
427 /* Don't tell the client, just downgrade. */
428 DEBUG(3, ("process_oplock_async_level2_break_message: downgrading fake level 2 oplock.\n"));
433 /* Ensure we're really at level2 state. */
434 SMB_ASSERT(fsp
->oplock_type
== LEVEL_II_OPLOCK
);
436 /* Now send a break to none message to our client. */
438 break_msg
= new_break_smb_message(NULL
, fsp
, OPLOCKLEVEL_NONE
);
439 if (break_msg
== NULL
) {
440 exit_server("Could not talloc break_msg\n");
443 /* Need to wait before sending a break message if we sent ourselves this message. */
444 if (procid_to_pid(&src
) == sys_getpid()) {
445 wait_before_sending_break();
448 /* Save the server smb signing state. */
449 sign_state
= srv_oplock_set_signing(False
);
452 if (!srv_send_smb(smbd_server_fd(),
454 IS_CONN_ENCRYPTED(fsp
->conn
))) {
455 exit_server_cleanly("oplock_break: srv_send_smb failed.");
458 /* Restore the sign state to what it was. */
459 srv_oplock_set_signing(sign_state
);
461 TALLOC_FREE(break_msg
);
463 /* Async level2 request, don't send a reply, just remove the oplock. */
467 /*******************************************************************
468 This handles the generic oplock break message from another smbd.
469 *******************************************************************/
471 static void process_oplock_break_message(struct messaging_context
*msg_ctx
,
474 struct server_id src
,
477 struct share_mode_entry msg
;
480 bool break_to_level2
= False
;
483 if (data
->data
== NULL
) {
484 DEBUG(0, ("Got NULL buffer\n"));
488 if (data
->length
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
489 DEBUG(0, ("Got invalid msg len %d\n", (int)data
->length
));
493 /* De-linearize incoming message. */
494 message_to_share_mode_entry(&msg
, (char *)data
->data
);
496 DEBUG(10, ("Got oplock break message from pid %d: %s/%lu\n",
497 (int)procid_to_pid(&src
), file_id_string_tos(&msg
.id
), msg
.share_file_id
));
499 fsp
= initial_break_processing(msg
.id
, msg
.share_file_id
);
502 /* a We hit race here. Break messages are sent, and before we
503 * get to process this message, we have closed the file. Reply
504 * with 'ok, oplock broken' */
505 DEBUG(3, ("Did not find fsp\n"));
507 /* We just send the same message back. */
508 messaging_send_buf(msg_ctx
, src
, MSG_SMB_BREAK_RESPONSE
,
510 MSG_SMB_SHARE_MODE_ENTRY_SIZE
);
514 if (fsp
->sent_oplock_break
!= NO_BREAK_SENT
) {
515 /* Remember we have to inform the requesting PID when the
518 ADD_TO_ARRAY(NULL
, struct share_mode_entry
, msg
,
519 &fsp
->pending_break_messages
,
520 &fsp
->num_pending_break_messages
);
524 if (EXCLUSIVE_OPLOCK_TYPE(msg
.op_type
) &&
525 !EXCLUSIVE_OPLOCK_TYPE(fsp
->oplock_type
)) {
526 DEBUG(3, ("Already downgraded oplock on %s: %s\n",
527 file_id_string_tos(&fsp
->file_id
),
529 /* We just send the same message back. */
530 messaging_send_buf(msg_ctx
, src
, MSG_SMB_BREAK_RESPONSE
,
532 MSG_SMB_SHARE_MODE_ENTRY_SIZE
);
536 if ((global_client_caps
& CAP_LEVEL_II_OPLOCKS
) &&
537 !(msg
.op_type
& FORCE_OPLOCK_BREAK_TO_NONE
) &&
538 !koplocks
&& /* NOTE: we force levelII off for kernel oplocks -
539 * this will change when it is supported */
540 lp_level2_oplocks(SNUM(fsp
->conn
))) {
541 break_to_level2
= True
;
544 break_msg
= new_break_smb_message(NULL
, fsp
, break_to_level2
?
545 OPLOCKLEVEL_II
: OPLOCKLEVEL_NONE
);
546 if (break_msg
== NULL
) {
547 exit_server("Could not talloc break_msg\n");
550 /* Need to wait before sending a break message if we sent ourselves this message. */
551 if (procid_to_pid(&src
) == sys_getpid()) {
552 wait_before_sending_break();
555 /* Save the server smb signing state. */
556 sign_state
= srv_oplock_set_signing(False
);
559 if (!srv_send_smb(smbd_server_fd(),
561 IS_CONN_ENCRYPTED(fsp
->conn
))) {
562 exit_server_cleanly("oplock_break: srv_send_smb failed.");
565 /* Restore the sign state to what it was. */
566 srv_oplock_set_signing(sign_state
);
568 TALLOC_FREE(break_msg
);
570 fsp
->sent_oplock_break
= break_to_level2
? LEVEL_II_BREAK_SENT
:BREAK_TO_NONE_SENT
;
573 ADD_TO_ARRAY(NULL
, struct share_mode_entry
, msg
,
574 &fsp
->pending_break_messages
,
575 &fsp
->num_pending_break_messages
);
577 add_oplock_timeout_handler(fsp
);
580 /*******************************************************************
581 This handles the kernel oplock break message.
582 *******************************************************************/
584 static void process_kernel_oplock_break(struct messaging_context
*msg_ctx
,
587 struct server_id src
,
591 unsigned long file_id
;
596 if (data
->data
== NULL
) {
597 DEBUG(0, ("Got NULL buffer\n"));
601 if (data
->length
!= MSG_SMB_KERNEL_BREAK_SIZE
) {
602 DEBUG(0, ("Got invalid msg len %d\n", (int)data
->length
));
606 /* Pull the data from the message. */
607 pull_file_id_16((char *)data
->data
, &id
);
608 file_id
= (unsigned long)IVAL(data
->data
, 16);
610 DEBUG(10, ("Got kernel oplock break message from pid %d: %s/%u\n",
611 (int)procid_to_pid(&src
), file_id_string_tos(&id
),
612 (unsigned int)file_id
));
614 fsp
= initial_break_processing(id
, file_id
);
617 DEBUG(3, ("Got a kernel oplock break message for a file "
618 "I don't know about\n"));
622 if (fsp
->sent_oplock_break
!= NO_BREAK_SENT
) {
623 /* This is ok, kernel oplocks come in completely async */
624 DEBUG(3, ("Got a kernel oplock request while waiting for a "
629 break_msg
= new_break_smb_message(NULL
, fsp
, OPLOCKLEVEL_NONE
);
630 if (break_msg
== NULL
) {
631 exit_server("Could not talloc break_msg\n");
634 /* Save the server smb signing state. */
635 sign_state
= srv_oplock_set_signing(False
);
638 if (!srv_send_smb(smbd_server_fd(),
640 IS_CONN_ENCRYPTED(fsp
->conn
))) {
641 exit_server_cleanly("oplock_break: srv_send_smb failed.");
644 /* Restore the sign state to what it was. */
645 srv_oplock_set_signing(sign_state
);
647 TALLOC_FREE(break_msg
);
649 fsp
->sent_oplock_break
= BREAK_TO_NONE_SENT
;
651 add_oplock_timeout_handler(fsp
);
654 void reply_to_oplock_break_requests(files_struct
*fsp
)
658 for (i
=0; i
<fsp
->num_pending_break_messages
; i
++) {
659 struct share_mode_entry
*e
= &fsp
->pending_break_messages
[i
];
660 char msg
[MSG_SMB_SHARE_MODE_ENTRY_SIZE
];
662 share_mode_entry_to_message(msg
, e
);
664 messaging_send_buf(smbd_messaging_context(), e
->pid
,
665 MSG_SMB_BREAK_RESPONSE
,
667 MSG_SMB_SHARE_MODE_ENTRY_SIZE
);
670 SAFE_FREE(fsp
->pending_break_messages
);
671 fsp
->num_pending_break_messages
= 0;
672 if (fsp
->oplock_timeout
!= NULL
) {
673 /* Remove the timed event handler. */
674 TALLOC_FREE(fsp
->oplock_timeout
);
675 fsp
->oplock_timeout
= NULL
;
680 static void process_oplock_break_response(struct messaging_context
*msg_ctx
,
683 struct server_id src
,
686 struct share_mode_entry msg
;
688 if (data
->data
== NULL
) {
689 DEBUG(0, ("Got NULL buffer\n"));
693 if (data
->length
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
694 DEBUG(0, ("Got invalid msg len %u\n",
695 (unsigned int)data
->length
));
699 /* De-linearize incoming message. */
700 message_to_share_mode_entry(&msg
, (char *)data
->data
);
702 DEBUG(10, ("Got oplock break response from pid %d: %s/%lu mid %u\n",
703 (int)procid_to_pid(&src
), file_id_string_tos(&msg
.id
), msg
.share_file_id
,
704 (unsigned int)msg
.op_mid
));
706 /* Here's the hack from open.c, store the mid in the 'port' field */
707 schedule_deferred_open_smb_message(msg
.op_mid
);
710 static void process_open_retry_message(struct messaging_context
*msg_ctx
,
713 struct server_id src
,
716 struct share_mode_entry msg
;
718 if (data
->data
== NULL
) {
719 DEBUG(0, ("Got NULL buffer\n"));
723 if (data
->length
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
724 DEBUG(0, ("Got invalid msg len %d\n", (int)data
->length
));
728 /* De-linearize incoming message. */
729 message_to_share_mode_entry(&msg
, (char *)data
->data
);
731 DEBUG(10, ("Got open retry msg from pid %d: %s mid %u\n",
732 (int)procid_to_pid(&src
), file_id_string_tos(&msg
.id
),
733 (unsigned int)msg
.op_mid
));
735 schedule_deferred_open_smb_message(msg
.op_mid
);
738 /****************************************************************************
739 This function is called on any file modification or lock request. If a file
740 is level 2 oplocked then it must tell all other level 2 holders to break to
742 ****************************************************************************/
744 void release_level_2_oplocks_on_change(files_struct
*fsp
)
747 struct share_mode_lock
*lck
;
750 * If this file is level II oplocked then we need
751 * to grab the shared memory lock and inform all
752 * other files with a level II lock that they need
753 * to flush their read caches. We keep the lock over
754 * the shared memory area whilst doing this.
757 if (!LEVEL_II_OPLOCK_TYPE(fsp
->oplock_type
))
760 lck
= get_share_mode_lock(talloc_tos(), fsp
->file_id
, NULL
, NULL
);
762 DEBUG(0,("release_level_2_oplocks_on_change: failed to lock "
763 "share mode entry for file %s.\n", fsp
->fsp_name
));
767 DEBUG(10,("release_level_2_oplocks_on_change: num_share_modes = %d\n",
768 lck
->num_share_modes
));
770 for(i
= 0; i
< lck
->num_share_modes
; i
++) {
771 struct share_mode_entry
*share_entry
= &lck
->share_modes
[i
];
772 char msg
[MSG_SMB_SHARE_MODE_ENTRY_SIZE
];
774 if (!is_valid_share_mode_entry(share_entry
)) {
779 * As there could have been multiple writes waiting at the
780 * lock_share_entry gate we may not be the first to
781 * enter. Hence the state of the op_types in the share mode
782 * entries may be partly NO_OPLOCK and partly LEVEL_II or FAKE_LEVEL_II
783 * oplock. It will do no harm to re-send break messages to
784 * those smbd's that are still waiting their turn to remove
785 * their LEVEL_II state, and also no harm to ignore existing
786 * NO_OPLOCK states. JRA.
789 DEBUG(10,("release_level_2_oplocks_on_change: "
790 "share_entry[%i]->op_type == %d\n",
791 i
, share_entry
->op_type
));
793 if (share_entry
->op_type
== NO_OPLOCK
) {
798 if (EXCLUSIVE_OPLOCK_TYPE(share_entry
->op_type
)) {
799 DEBUG(0,("release_level_2_oplocks_on_change: PANIC. "
800 "share mode entry %d is an exlusive "
806 share_mode_entry_to_message(msg
, share_entry
);
808 messaging_send_buf(smbd_messaging_context(), share_entry
->pid
,
809 MSG_SMB_ASYNC_LEVEL2_BREAK
,
811 MSG_SMB_SHARE_MODE_ENTRY_SIZE
);
814 /* We let the message receivers handle removing the oplock state
815 in the share mode lock db. */
820 /****************************************************************************
821 Linearize a share mode entry struct to an internal oplock break message.
822 ****************************************************************************/
824 void share_mode_entry_to_message(char *msg
, struct share_mode_entry
*e
)
826 SIVAL(msg
,0,(uint32
)e
->pid
.pid
);
827 SSVAL(msg
,4,e
->op_mid
);
828 SSVAL(msg
,6,e
->op_type
);
829 SIVAL(msg
,8,e
->access_mask
);
830 SIVAL(msg
,12,e
->share_access
);
831 SIVAL(msg
,16,e
->private_options
);
832 SIVAL(msg
,20,(uint32
)e
->time
.tv_sec
);
833 SIVAL(msg
,24,(uint32
)e
->time
.tv_usec
);
834 push_file_id_16(msg
+28, &e
->id
);
835 SIVAL(msg
,44,e
->share_file_id
);
836 SIVAL(msg
,48,e
->uid
);
837 SSVAL(msg
,52,e
->flags
);
838 #ifdef CLUSTER_SUPPORT
839 SIVAL(msg
,54,e
->pid
.vnn
);
843 /****************************************************************************
844 De-linearize an internal oplock break message to a share mode entry struct.
845 ****************************************************************************/
847 void message_to_share_mode_entry(struct share_mode_entry
*e
, char *msg
)
849 e
->pid
.pid
= (pid_t
)IVAL(msg
,0);
850 e
->op_mid
= SVAL(msg
,4);
851 e
->op_type
= SVAL(msg
,6);
852 e
->access_mask
= IVAL(msg
,8);
853 e
->share_access
= IVAL(msg
,12);
854 e
->private_options
= IVAL(msg
,16);
855 e
->time
.tv_sec
= (time_t)IVAL(msg
,20);
856 e
->time
.tv_usec
= (int)IVAL(msg
,24);
857 pull_file_id_16(msg
+28, &e
->id
);
858 e
->share_file_id
= (unsigned long)IVAL(msg
,44);
859 e
->uid
= (uint32
)IVAL(msg
,48);
860 e
->flags
= (uint16
)SVAL(msg
,52);
861 #ifdef CLUSTER_SUPPORT
862 e
->pid
.vnn
= IVAL(msg
,54);
866 /****************************************************************************
867 Setup oplocks for this process.
868 ****************************************************************************/
870 bool init_oplocks(struct messaging_context
*msg_ctx
)
872 DEBUG(3,("init_oplocks: initializing messages.\n"));
874 messaging_register(msg_ctx
, NULL
, MSG_SMB_BREAK_REQUEST
,
875 process_oplock_break_message
);
876 messaging_register(msg_ctx
, NULL
, MSG_SMB_ASYNC_LEVEL2_BREAK
,
877 process_oplock_async_level2_break_message
);
878 messaging_register(msg_ctx
, NULL
, MSG_SMB_BREAK_RESPONSE
,
879 process_oplock_break_response
);
880 messaging_register(msg_ctx
, NULL
, MSG_SMB_KERNEL_BREAK
,
881 process_kernel_oplock_break
);
882 messaging_register(msg_ctx
, NULL
, MSG_SMB_OPEN_RETRY
,
883 process_open_retry_message
);
885 if (lp_kernel_oplocks()) {
886 #if HAVE_KERNEL_OPLOCKS_IRIX
887 koplocks
= irix_init_kernel_oplocks();
888 #elif HAVE_KERNEL_OPLOCKS_LINUX
889 koplocks
= linux_init_kernel_oplocks();