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 2 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, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #define DBGC_CLASS DBGC_LOCKING
26 /* Current number of oplocks we have outstanding. */
27 static int32 exclusive_oplocks_open
= 0;
28 static int32 level_II_oplocks_open
= 0;
29 BOOL global_client_failed_oplock_break
= False
;
31 extern uint32 global_client_caps
;
32 extern int smb_read_error
;
34 static struct kernel_oplocks
*koplocks
;
36 /****************************************************************************
37 Get the number of current exclusive oplocks.
38 ****************************************************************************/
40 int32
get_number_of_exclusive_open_oplocks(void)
42 return exclusive_oplocks_open
;
45 /****************************************************************************
46 Return True if an oplock message is pending.
47 ****************************************************************************/
49 BOOL
oplock_message_waiting(fd_set
*fds
)
51 if (koplocks
&& koplocks
->msg_waiting(fds
)) {
58 /****************************************************************************
59 Find out if there are any kernel oplock messages waiting and process them
60 if so. pfds is the fd_set from the main select loop (which contains any
61 kernel oplock fd if that's what the system uses (IRIX). If may be NULL if
62 we're calling this in a shutting down state.
63 ****************************************************************************/
65 void process_kernel_oplocks(fd_set
*pfds
)
68 * We need to check for kernel oplocks before going into the select
69 * here, as the EINTR generated by the linux kernel oplock may have
70 * already been eaten. JRA.
77 while (koplocks
->msg_waiting(pfds
)) {
79 char msg
[MSG_SMB_KERNEL_BREAK_SIZE
];
81 fsp
= koplocks
->receive_message(pfds
);
84 DEBUG(3, ("Kernel oplock message announced, but none "
89 /* Put the kernel break info into the message. */
90 SDEV_T_VAL(msg
,0,fsp
->dev
);
91 SINO_T_VAL(msg
,8,fsp
->inode
);
92 SIVAL(msg
,16,fsp
->fh
->file_id
);
94 /* Don't need to be root here as we're only ever
95 sending to ourselves. */
97 message_send_pid(pid_to_procid(sys_getpid()),
99 &msg
, MSG_SMB_KERNEL_BREAK_SIZE
, True
);
103 /****************************************************************************
104 Attempt to set an oplock on a file. Always succeeds if kernel oplocks are
105 disabled (just sets flags). Returns True if oplock set.
106 ****************************************************************************/
108 BOOL
set_file_oplock(files_struct
*fsp
, int oplock_type
)
110 if (koplocks
&& !koplocks
->set_oplock(fsp
, oplock_type
)) {
114 fsp
->oplock_type
= oplock_type
;
115 fsp
->sent_oplock_break
= NO_BREAK_SENT
;
116 if (oplock_type
== LEVEL_II_OPLOCK
) {
117 level_II_oplocks_open
++;
119 exclusive_oplocks_open
++;
122 DEBUG(5,("set_file_oplock: granted oplock on file %s, 0x%x/%.0f/%lu, "
123 "tv_sec = %x, tv_usec = %x\n",
124 fsp
->fsp_name
, (unsigned int)fsp
->dev
, (double)fsp
->inode
,
125 fsp
->fh
->file_id
, (int)fsp
->open_time
.tv_sec
,
126 (int)fsp
->open_time
.tv_usec
));
131 /****************************************************************************
132 Attempt to release an oplock on a file. Decrements oplock count.
133 ****************************************************************************/
135 void release_file_oplock(files_struct
*fsp
)
137 if ((fsp
->oplock_type
!= NO_OPLOCK
) &&
138 (fsp
->oplock_type
!= FAKE_LEVEL_II_OPLOCK
) &&
140 koplocks
->release_oplock(fsp
);
143 if (fsp
->oplock_type
== LEVEL_II_OPLOCK
) {
144 level_II_oplocks_open
--;
145 } else if (EXCLUSIVE_OPLOCK_TYPE(fsp
->oplock_type
)) {
146 exclusive_oplocks_open
--;
149 SMB_ASSERT(exclusive_oplocks_open
>=0);
150 SMB_ASSERT(level_II_oplocks_open
>=0);
152 fsp
->oplock_type
= NO_OPLOCK
;
153 fsp
->sent_oplock_break
= NO_BREAK_SENT
;
155 flush_write_cache(fsp
, OPLOCK_RELEASE_FLUSH
);
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
)
181 SMB_DEV_T dev
= fsp
->dev
;
182 SMB_INO_T inode
= fsp
->inode
;
184 struct share_mode_lock
*lck
;
186 /* Remove the oplock flag from the sharemode. */
187 lck
= get_share_mode_lock(NULL
, fsp
->dev
, fsp
->inode
, NULL
, NULL
);
189 DEBUG(0,("remove_oplock: failed to lock share entry for "
190 "file %s\n", fsp
->fsp_name
));
193 ret
= remove_share_oplock(lck
, fsp
);
195 DEBUG(0,("remove_oplock: failed to remove share oplock for "
196 "file %s fnum %d, 0x%x/%.0f\n",
197 fsp
->fsp_name
, fsp
->fnum
, (unsigned int)dev
,
200 release_file_oplock(fsp
);
206 * Deal with a reply when a break-to-level II was sent.
208 BOOL
downgrade_oplock(files_struct
*fsp
)
210 SMB_DEV_T dev
= fsp
->dev
;
211 SMB_INO_T inode
= fsp
->inode
;
213 struct share_mode_lock
*lck
;
215 lck
= get_share_mode_lock(NULL
, fsp
->dev
, fsp
->inode
, NULL
, NULL
);
217 DEBUG(0,("downgrade_oplock: failed to lock share entry for "
218 "file %s\n", fsp
->fsp_name
));
221 ret
= downgrade_share_oplock(lck
, fsp
);
223 DEBUG(0,("downgrade_oplock: failed to downgrade share oplock "
224 "for file %s fnum %d, dev = %x, inode = %.0f\n",
225 fsp
->fsp_name
, fsp
->fnum
, (unsigned int)dev
,
229 downgrade_file_oplock(fsp
);
234 /****************************************************************************
235 Return the fd (if any) used for receiving oplock notifications.
236 ****************************************************************************/
238 int oplock_notify_fd(void)
241 return koplocks
->notification_fd
;
247 /****************************************************************************
248 Set up an oplock break message.
249 ****************************************************************************/
251 static char *new_break_smb_message(TALLOC_CTX
*mem_ctx
,
252 files_struct
*fsp
, uint8 cmd
)
254 char *result
= TALLOC_ARRAY(mem_ctx
, char, smb_size
+ 8*2 + 0);
256 if (result
== NULL
) {
257 DEBUG(0, ("talloc failed\n"));
261 memset(result
,'\0',smb_size
);
262 set_message(result
,8,0,True
);
263 SCVAL(result
,smb_com
,SMBlockingX
);
264 SSVAL(result
,smb_tid
,fsp
->conn
->cnum
);
265 SSVAL(result
,smb_pid
,0xFFFF);
266 SSVAL(result
,smb_uid
,0);
267 SSVAL(result
,smb_mid
,0xFFFF);
268 SCVAL(result
,smb_vwv0
,0xFF);
269 SSVAL(result
,smb_vwv2
,fsp
->fnum
);
270 SCVAL(result
,smb_vwv3
,LOCKING_ANDX_OPLOCK_RELEASE
);
271 SCVAL(result
,smb_vwv3
+1,cmd
);
275 /****************************************************************************
276 Function to do the waiting before sending a local break.
277 ****************************************************************************/
279 static void wait_before_sending_break(void)
281 long wait_time
= (long)lp_oplock_break_wait_time();
284 smb_msleep(wait_time
);
288 /****************************************************************************
289 Ensure that we have a valid oplock.
290 ****************************************************************************/
292 static files_struct
*initial_break_processing(SMB_DEV_T dev
, SMB_INO_T inode
, unsigned long file_id
)
294 files_struct
*fsp
= NULL
;
296 if( DEBUGLVL( 3 ) ) {
297 dbgtext( "initial_break_processing: called for 0x%x/%.0f/%u\n",
298 (unsigned int)dev
, (double)inode
, (int)file_id
);
299 dbgtext( "Current oplocks_open (exclusive = %d, levelII = %d)\n",
300 exclusive_oplocks_open
, level_II_oplocks_open
);
304 * We need to search the file open table for the
305 * entry containing this dev and inode, and ensure
306 * we have an oplock on it.
309 fsp
= file_find_dif(dev
, inode
, file_id
);
312 /* The file could have been closed in the meantime - return success. */
313 if( DEBUGLVL( 3 ) ) {
314 dbgtext( "initial_break_processing: cannot find open file with " );
315 dbgtext( "dev = 0x%x, inode = %.0f file_id = %lu", (unsigned int)dev
,
316 (double)inode
, file_id
);
317 dbgtext( "allowing break to succeed.\n" );
322 /* Ensure we have an oplock on the file */
325 * There is a potential race condition in that an oplock could
326 * have been broken due to another udp request, and yet there are
327 * still oplock break messages being sent in the udp message
328 * queue for this file. So return true if we don't have an oplock,
329 * as we may have just freed it.
332 if(fsp
->oplock_type
== NO_OPLOCK
) {
333 if( DEBUGLVL( 3 ) ) {
334 dbgtext( "initial_break_processing: file %s ", fsp
->fsp_name
);
335 dbgtext( "(dev = %x, inode = %.0f, file_id = %lu) has no oplock.\n",
336 (unsigned int)dev
, (double)inode
, fsp
->fh
->file_id
);
337 dbgtext( "Allowing break to succeed regardless.\n" );
345 static void oplock_timeout_handler(struct timed_event
*te
,
346 const struct timeval
*now
,
349 files_struct
*fsp
= private_data
;
351 DEBUG(0, ("Oplock break failed for file %s -- replying anyway\n", fsp
->fsp_name
));
352 global_client_failed_oplock_break
= True
;
354 reply_to_oplock_break_requests(fsp
);
357 /*******************************************************************
358 Add a timeout handler waiting for the client reply.
359 *******************************************************************/
361 static void add_oplock_timeout_handler(files_struct
*fsp
)
363 if (fsp
->oplock_timeout
!= NULL
) {
364 DEBUG(0, ("Logic problem -- have an oplock event hanging "
368 fsp
->oplock_timeout
=
369 add_timed_event(NULL
,
370 timeval_current_ofs(OPLOCK_BREAK_TIMEOUT
, 0),
371 "oplock_timeout_handler",
372 oplock_timeout_handler
, fsp
);
374 if (fsp
->oplock_timeout
== NULL
) {
375 DEBUG(0, ("Could not add oplock timeout handler\n"));
379 /*******************************************************************
380 This handles the case of a write triggering a break to none
381 message on a level2 oplock.
382 When we get this message we may be in any of three states :
383 NO_OPLOCK, LEVEL_II, FAKE_LEVEL2. We only send a message to
384 the client for LEVEL2.
385 *******************************************************************/
387 static void process_oplock_async_level2_break_message(int msg_type
, struct process_id src
,
388 void *buf
, size_t len
)
390 struct share_mode_entry msg
;
396 DEBUG(0, ("Got NULL buffer\n"));
400 if (len
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
401 DEBUG(0, ("Got invalid msg len %d\n", (int)len
));
405 /* De-linearize incoming message. */
406 message_to_share_mode_entry(&msg
, buf
);
408 DEBUG(10, ("Got oplock async level 2 break message from pid %d: 0x%x/%.0f/%lu\n",
409 (int)procid_to_pid(&src
), (unsigned int)msg
.dev
,
410 (double)msg
.inode
, msg
.share_file_id
));
412 fsp
= initial_break_processing(msg
.dev
, msg
.inode
,
416 /* We hit a race here. Break messages are sent, and before we
417 * get to process this message, we have closed the file.
418 * No need to reply as this is an async message. */
419 DEBUG(3, ("process_oplock_async_level2_break_message: Did not find fsp, ignoring\n"));
423 if (fsp
->oplock_type
== NO_OPLOCK
) {
424 /* We already got a "break to none" message and we've handled it.
426 DEBUG(3, ("process_oplock_async_level2_break_message: already broken to none, ignoring.\n"));
430 if (fsp
->oplock_type
== FAKE_LEVEL_II_OPLOCK
) {
431 /* Don't tell the client, just downgrade. */
432 DEBUG(3, ("process_oplock_async_level2_break_message: downgrading fake level 2 oplock.\n"));
437 /* Ensure we're really at level2 state. */
438 SMB_ASSERT(fsp
->oplock_type
== LEVEL_II_OPLOCK
);
440 /* Now send a break to none message to our client. */
442 break_msg
= new_break_smb_message(NULL
, fsp
, OPLOCKLEVEL_NONE
);
443 if (break_msg
== NULL
) {
444 exit_server("Could not talloc break_msg\n");
447 /* Need to wait before sending a break message if we sent ourselves this message. */
448 if (procid_to_pid(&src
) == sys_getpid()) {
449 wait_before_sending_break();
452 /* Save the server smb signing state. */
453 sign_state
= srv_oplock_set_signing(False
);
456 if (!send_smb(smbd_server_fd(), break_msg
)) {
457 exit_server("oplock_break: send_smb failed.");
460 /* Restore the sign state to what it was. */
461 srv_oplock_set_signing(sign_state
);
463 TALLOC_FREE(break_msg
);
465 /* Async level2 request, don't send a reply, just remove the oplock. */
469 /*******************************************************************
470 This handles the generic oplock break message from another smbd.
471 *******************************************************************/
473 static void process_oplock_break_message(int msg_type
, struct process_id src
,
474 void *buf
, size_t len
)
476 struct share_mode_entry msg
;
479 BOOL break_to_level2
= False
;
483 DEBUG(0, ("Got NULL buffer\n"));
487 if (len
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
488 DEBUG(0, ("Got invalid msg len %d\n", (int)len
));
492 /* De-linearize incoming message. */
493 message_to_share_mode_entry(&msg
, buf
);
495 DEBUG(10, ("Got oplock break message from pid %d: 0x%x/%.0f/%lu\n",
496 (int)procid_to_pid(&src
), (unsigned int)msg
.dev
,
497 (double)msg
.inode
, msg
.share_file_id
));
499 fsp
= initial_break_processing(msg
.dev
, msg
.inode
,
503 /* a We hit race here. Break messages are sent, and before we
504 * get to process this message, we have closed the file. Reply
505 * with 'ok, oplock broken' */
506 DEBUG(3, ("Did not find fsp\n"));
509 /* We just send the same message back. */
510 message_send_pid(src
, MSG_SMB_BREAK_RESPONSE
,
511 buf
, MSG_SMB_SHARE_MODE_ENTRY_SIZE
, True
);
517 if (fsp
->sent_oplock_break
!= NO_BREAK_SENT
) {
518 /* Remember we have to inform the requesting PID when the
521 ADD_TO_ARRAY(NULL
, struct share_mode_entry
, msg
,
522 &fsp
->pending_break_messages
,
523 &fsp
->num_pending_break_messages
);
527 if (EXCLUSIVE_OPLOCK_TYPE(msg
.op_type
) &&
528 !EXCLUSIVE_OPLOCK_TYPE(fsp
->oplock_type
)) {
529 DEBUG(3, ("Already downgraded oplock on 0x%x/%.0f: %s\n",
530 (unsigned int)fsp
->dev
, (double)fsp
->inode
,
534 /* We just send the same message back. */
535 message_send_pid(src
, MSG_SMB_BREAK_RESPONSE
,
536 buf
, MSG_SMB_SHARE_MODE_ENTRY_SIZE
, True
);
542 if ((global_client_caps
& CAP_LEVEL_II_OPLOCKS
) &&
543 !(msg
.op_type
& FORCE_OPLOCK_BREAK_TO_NONE
) &&
544 !koplocks
&& /* NOTE: we force levelII off for kernel oplocks -
545 * this will change when it is supported */
546 lp_level2_oplocks(SNUM(fsp
->conn
))) {
547 break_to_level2
= True
;
550 break_msg
= new_break_smb_message(NULL
, fsp
, break_to_level2
?
551 OPLOCKLEVEL_II
: OPLOCKLEVEL_NONE
);
552 if (break_msg
== NULL
) {
553 exit_server("Could not talloc break_msg\n");
556 /* Need to wait before sending a break message if we sent ourselves this message. */
557 if (procid_to_pid(&src
) == sys_getpid()) {
558 wait_before_sending_break();
561 /* Save the server smb signing state. */
562 sign_state
= srv_oplock_set_signing(False
);
565 if (!send_smb(smbd_server_fd(), break_msg
)) {
566 exit_server("oplock_break: send_smb failed.");
569 /* Restore the sign state to what it was. */
570 srv_oplock_set_signing(sign_state
);
572 TALLOC_FREE(break_msg
);
574 fsp
->sent_oplock_break
= break_to_level2
? LEVEL_II_BREAK_SENT
:BREAK_TO_NONE_SENT
;
577 ADD_TO_ARRAY(NULL
, struct share_mode_entry
, msg
,
578 &fsp
->pending_break_messages
,
579 &fsp
->num_pending_break_messages
);
581 add_oplock_timeout_handler(fsp
);
584 /*******************************************************************
585 This handles the kernel oplock break message.
586 *******************************************************************/
588 static void process_kernel_oplock_break(int msg_type
, struct process_id src
,
589 void *buf
, size_t len
)
593 unsigned long file_id
;
599 DEBUG(0, ("Got NULL buffer\n"));
603 if (len
!= MSG_SMB_KERNEL_BREAK_SIZE
) {
604 DEBUG(0, ("Got invalid msg len %d\n", (int)len
));
608 /* Pull the data from the message. */
609 dev
= DEV_T_VAL(buf
, 0);
610 inode
= INO_T_VAL(buf
, 8);
611 file_id
= (unsigned long)IVAL(buf
, 16);
613 DEBUG(10, ("Got kernel oplock break message from pid %d: 0x%x/%.0f/%u\n",
614 (int)procid_to_pid(&src
), (unsigned int)dev
, (double)inode
,
615 (unsigned int)file_id
));
617 fsp
= initial_break_processing(dev
, inode
, file_id
);
620 DEBUG(3, ("Got a kernel oplock break message for a file "
621 "I don't know about\n"));
625 if (fsp
->sent_oplock_break
!= NO_BREAK_SENT
) {
626 /* This is ok, kernel oplocks come in completely async */
627 DEBUG(3, ("Got a kernel oplock request while waiting for a "
632 break_msg
= new_break_smb_message(NULL
, fsp
, OPLOCKLEVEL_NONE
);
633 if (break_msg
== NULL
) {
634 exit_server("Could not talloc break_msg\n");
637 /* Save the server smb signing state. */
638 sign_state
= srv_oplock_set_signing(False
);
641 if (!send_smb(smbd_server_fd(), break_msg
)) {
642 exit_server("oplock_break: send_smb failed.");
645 /* Restore the sign state to what it was. */
646 srv_oplock_set_signing(sign_state
);
648 TALLOC_FREE(break_msg
);
650 fsp
->sent_oplock_break
= BREAK_TO_NONE_SENT
;
652 add_oplock_timeout_handler(fsp
);
655 void reply_to_oplock_break_requests(files_struct
*fsp
)
660 for (i
=0; i
<fsp
->num_pending_break_messages
; i
++) {
661 struct share_mode_entry
*e
= &fsp
->pending_break_messages
[i
];
662 char msg
[MSG_SMB_SHARE_MODE_ENTRY_SIZE
];
664 share_mode_entry_to_message(msg
, e
);
666 message_send_pid(e
->pid
, MSG_SMB_BREAK_RESPONSE
,
667 msg
, MSG_SMB_SHARE_MODE_ENTRY_SIZE
, True
);
671 SAFE_FREE(fsp
->pending_break_messages
);
672 fsp
->num_pending_break_messages
= 0;
673 if (fsp
->oplock_timeout
!= NULL
) {
674 /* Remove the timed event handler. */
675 TALLOC_FREE(fsp
->oplock_timeout
);
676 fsp
->oplock_timeout
= NULL
;
681 static void process_oplock_break_response(int msg_type
, struct process_id src
,
682 void *buf
, size_t len
)
684 struct share_mode_entry msg
;
687 DEBUG(0, ("Got NULL buffer\n"));
691 if (len
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
692 DEBUG(0, ("Got invalid msg len %u\n", (unsigned int)len
));
696 /* De-linearize incoming message. */
697 message_to_share_mode_entry(&msg
, buf
);
699 DEBUG(10, ("Got oplock break response from pid %d: 0x%x/%.0f/%lu mid %u\n",
700 (int)procid_to_pid(&src
), (unsigned int)msg
.dev
,
701 (double)msg
.inode
, msg
.share_file_id
,
702 (unsigned int)msg
.op_mid
));
704 /* Here's the hack from open.c, store the mid in the 'port' field */
705 schedule_deferred_open_smb_message(msg
.op_mid
);
708 static void process_open_retry_message(int msg_type
, struct process_id src
,
709 void *buf
, size_t len
)
711 struct share_mode_entry msg
;
714 DEBUG(0, ("Got NULL buffer\n"));
718 if (len
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
719 DEBUG(0, ("Got invalid msg len %d\n", (int)len
));
723 /* De-linearize incoming message. */
724 message_to_share_mode_entry(&msg
, buf
);
726 DEBUG(10, ("Got open retry msg from pid %d: 0x%x/%.0f/%lu mid %u\n",
727 (int)procid_to_pid(&src
), (unsigned int)msg
.dev
,
728 (double)msg
.inode
, msg
.share_file_id
,
729 (unsigned int)msg
.op_mid
));
731 schedule_deferred_open_smb_message(msg
.op_mid
);
734 /****************************************************************************
735 This function is called on any file modification or lock request. If a file
736 is level 2 oplocked then it must tell all other level 2 holders to break to
738 ****************************************************************************/
740 void release_level_2_oplocks_on_change(files_struct
*fsp
)
743 struct share_mode_lock
*lck
;
746 * If this file is level II oplocked then we need
747 * to grab the shared memory lock and inform all
748 * other files with a level II lock that they need
749 * to flush their read caches. We keep the lock over
750 * the shared memory area whilst doing this.
753 if (!LEVEL_II_OPLOCK_TYPE(fsp
->oplock_type
))
756 lck
= get_share_mode_lock(NULL
, fsp
->dev
, fsp
->inode
, NULL
, NULL
);
758 DEBUG(0,("release_level_2_oplocks_on_change: failed to lock "
759 "share mode entry for file %s.\n", fsp
->fsp_name
));
763 DEBUG(10,("release_level_2_oplocks_on_change: num_share_modes = %d\n",
764 lck
->num_share_modes
));
766 for(i
= 0; i
< lck
->num_share_modes
; i
++) {
767 struct share_mode_entry
*share_entry
= &lck
->share_modes
[i
];
768 char msg
[MSG_SMB_SHARE_MODE_ENTRY_SIZE
];
770 if (!is_valid_share_mode_entry(share_entry
)) {
775 * As there could have been multiple writes waiting at the
776 * lock_share_entry gate we may not be the first to
777 * enter. Hence the state of the op_types in the share mode
778 * entries may be partly NO_OPLOCK and partly LEVEL_II or FAKE_LEVEL_II
779 * oplock. It will do no harm to re-send break messages to
780 * those smbd's that are still waiting their turn to remove
781 * their LEVEL_II state, and also no harm to ignore existing
782 * NO_OPLOCK states. JRA.
785 DEBUG(10,("release_level_2_oplocks_on_change: "
786 "share_entry[%i]->op_type == %d\n",
787 i
, share_entry
->op_type
));
789 if (share_entry
->op_type
== NO_OPLOCK
) {
794 if (EXCLUSIVE_OPLOCK_TYPE(share_entry
->op_type
)) {
795 DEBUG(0,("release_level_2_oplocks_on_change: PANIC. "
796 "share mode entry %d is an exlusive "
802 share_mode_entry_to_message(msg
, share_entry
);
805 message_send_pid(share_entry
->pid
, MSG_SMB_ASYNC_LEVEL2_BREAK
,
806 msg
, MSG_SMB_SHARE_MODE_ENTRY_SIZE
, True
);
810 /* We let the message receivers handle removing the oplock state
811 in the share mode lock db. */
816 /****************************************************************************
817 Linearize a share mode entry struct to an internal oplock break message.
818 ****************************************************************************/
820 void share_mode_entry_to_message(char *msg
, struct share_mode_entry
*e
)
822 SIVAL(msg
,0,(uint32
)e
->pid
.pid
);
823 SSVAL(msg
,4,e
->op_mid
);
824 SSVAL(msg
,6,e
->op_type
);
825 SIVAL(msg
,8,e
->access_mask
);
826 SIVAL(msg
,12,e
->share_access
);
827 SIVAL(msg
,16,e
->private_options
);
828 SIVAL(msg
,20,(uint32
)e
->time
.tv_sec
);
829 SIVAL(msg
,24,(uint32
)e
->time
.tv_usec
);
830 SDEV_T_VAL(msg
,28,e
->dev
);
831 SINO_T_VAL(msg
,36,e
->inode
);
832 SIVAL(msg
,44,e
->share_file_id
);
833 SIVAL(msg
,48,e
->uid
);
836 /****************************************************************************
837 De-linearize an internal oplock break message to a share mode entry struct.
838 ****************************************************************************/
840 void message_to_share_mode_entry(struct share_mode_entry
*e
, char *msg
)
842 e
->pid
.pid
= (pid_t
)IVAL(msg
,0);
843 e
->op_mid
= SVAL(msg
,4);
844 e
->op_type
= SVAL(msg
,6);
845 e
->access_mask
= IVAL(msg
,8);
846 e
->share_access
= IVAL(msg
,12);
847 e
->private_options
= IVAL(msg
,16);
848 e
->time
.tv_sec
= (time_t)IVAL(msg
,20);
849 e
->time
.tv_usec
= (int)IVAL(msg
,24);
850 e
->dev
= DEV_T_VAL(msg
,28);
851 e
->inode
= INO_T_VAL(msg
,36);
852 e
->share_file_id
= (unsigned long)IVAL(msg
,44);
853 e
->uid
= (uint32
)IVAL(msg
,48);
856 /****************************************************************************
857 Setup oplocks for this process.
858 ****************************************************************************/
860 BOOL
init_oplocks(void)
862 DEBUG(3,("open_oplock_ipc: initializing messages.\n"));
864 message_register(MSG_SMB_BREAK_REQUEST
,
865 process_oplock_break_message
);
866 message_register(MSG_SMB_ASYNC_LEVEL2_BREAK
,
867 process_oplock_async_level2_break_message
);
868 message_register(MSG_SMB_BREAK_RESPONSE
,
869 process_oplock_break_response
);
870 message_register(MSG_SMB_KERNEL_BREAK
,
871 process_kernel_oplock_break
);
872 message_register(MSG_SMB_OPEN_RETRY
,
873 process_open_retry_message
);
875 if (lp_kernel_oplocks()) {
876 #if HAVE_KERNEL_OPLOCKS_IRIX
877 koplocks
= irix_init_kernel_oplocks();
878 #elif HAVE_KERNEL_OPLOCKS_LINUX
879 koplocks
= linux_init_kernel_oplocks();