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
);
157 TALLOC_FREE(fsp
->oplock_timeout
);
160 /****************************************************************************
161 Attempt to downgrade an oplock on a file. Doesn't decrement oplock count.
162 ****************************************************************************/
164 static void downgrade_file_oplock(files_struct
*fsp
)
167 koplocks
->release_oplock(fsp
);
169 fsp
->oplock_type
= LEVEL_II_OPLOCK
;
170 exclusive_oplocks_open
--;
171 level_II_oplocks_open
++;
172 fsp
->sent_oplock_break
= NO_BREAK_SENT
;
175 /****************************************************************************
176 Remove a file oplock. Copes with level II and exclusive.
177 Locks then unlocks the share mode lock. Client can decide to go directly
178 to none even if a "break-to-level II" was sent.
179 ****************************************************************************/
181 BOOL
remove_oplock(files_struct
*fsp
)
183 SMB_DEV_T dev
= fsp
->dev
;
184 SMB_INO_T inode
= fsp
->inode
;
186 struct share_mode_lock
*lck
;
188 /* Remove the oplock flag from the sharemode. */
189 lck
= get_share_mode_lock(NULL
, fsp
->dev
, fsp
->inode
, NULL
, NULL
);
191 DEBUG(0,("remove_oplock: failed to lock share entry for "
192 "file %s\n", fsp
->fsp_name
));
195 ret
= remove_share_oplock(lck
, fsp
);
197 DEBUG(0,("remove_oplock: failed to remove share oplock for "
198 "file %s fnum %d, 0x%x/%.0f\n",
199 fsp
->fsp_name
, fsp
->fnum
, (unsigned int)dev
,
202 release_file_oplock(fsp
);
208 * Deal with a reply when a break-to-level II was sent.
210 BOOL
downgrade_oplock(files_struct
*fsp
)
212 SMB_DEV_T dev
= fsp
->dev
;
213 SMB_INO_T inode
= fsp
->inode
;
215 struct share_mode_lock
*lck
;
217 lck
= get_share_mode_lock(NULL
, fsp
->dev
, fsp
->inode
, NULL
, NULL
);
219 DEBUG(0,("downgrade_oplock: failed to lock share entry for "
220 "file %s\n", fsp
->fsp_name
));
223 ret
= downgrade_share_oplock(lck
, fsp
);
225 DEBUG(0,("downgrade_oplock: failed to downgrade share oplock "
226 "for file %s fnum %d, dev = %x, inode = %.0f\n",
227 fsp
->fsp_name
, fsp
->fnum
, (unsigned int)dev
,
231 downgrade_file_oplock(fsp
);
236 /****************************************************************************
237 Return the fd (if any) used for receiving oplock notifications.
238 ****************************************************************************/
240 int oplock_notify_fd(void)
243 return koplocks
->notification_fd
;
249 /****************************************************************************
250 Set up an oplock break message.
251 ****************************************************************************/
253 static char *new_break_smb_message(TALLOC_CTX
*mem_ctx
,
254 files_struct
*fsp
, uint8 cmd
)
256 char *result
= TALLOC_ARRAY(mem_ctx
, char, smb_size
+ 8*2 + 0);
258 if (result
== NULL
) {
259 DEBUG(0, ("talloc failed\n"));
263 memset(result
,'\0',smb_size
);
264 set_message(result
,8,0,True
);
265 SCVAL(result
,smb_com
,SMBlockingX
);
266 SSVAL(result
,smb_tid
,fsp
->conn
->cnum
);
267 SSVAL(result
,smb_pid
,0xFFFF);
268 SSVAL(result
,smb_uid
,0);
269 SSVAL(result
,smb_mid
,0xFFFF);
270 SCVAL(result
,smb_vwv0
,0xFF);
271 SSVAL(result
,smb_vwv2
,fsp
->fnum
);
272 SCVAL(result
,smb_vwv3
,LOCKING_ANDX_OPLOCK_RELEASE
);
273 SCVAL(result
,smb_vwv3
+1,cmd
);
277 /****************************************************************************
278 Function to do the waiting before sending a local break.
279 ****************************************************************************/
281 static void wait_before_sending_break(void)
283 long wait_time
= (long)lp_oplock_break_wait_time();
286 smb_msleep(wait_time
);
290 /****************************************************************************
291 Ensure that we have a valid oplock.
292 ****************************************************************************/
294 static files_struct
*initial_break_processing(SMB_DEV_T dev
, SMB_INO_T inode
, unsigned long file_id
)
296 files_struct
*fsp
= NULL
;
298 if( DEBUGLVL( 3 ) ) {
299 dbgtext( "initial_break_processing: called for 0x%x/%.0f/%u\n",
300 (unsigned int)dev
, (double)inode
, (int)file_id
);
301 dbgtext( "Current oplocks_open (exclusive = %d, levelII = %d)\n",
302 exclusive_oplocks_open
, level_II_oplocks_open
);
306 * We need to search the file open table for the
307 * entry containing this dev and inode, and ensure
308 * we have an oplock on it.
311 fsp
= file_find_dif(dev
, inode
, file_id
);
314 /* The file could have been closed in the meantime - return success. */
315 if( DEBUGLVL( 3 ) ) {
316 dbgtext( "initial_break_processing: cannot find open file with " );
317 dbgtext( "dev = 0x%x, inode = %.0f file_id = %lu", (unsigned int)dev
,
318 (double)inode
, file_id
);
319 dbgtext( "allowing break to succeed.\n" );
324 /* Ensure we have an oplock on the file */
327 * There is a potential race condition in that an oplock could
328 * have been broken due to another udp request, and yet there are
329 * still oplock break messages being sent in the udp message
330 * queue for this file. So return true if we don't have an oplock,
331 * as we may have just freed it.
334 if(fsp
->oplock_type
== NO_OPLOCK
) {
335 if( DEBUGLVL( 3 ) ) {
336 dbgtext( "initial_break_processing: file %s ", fsp
->fsp_name
);
337 dbgtext( "(dev = %x, inode = %.0f, file_id = %lu) has no oplock.\n",
338 (unsigned int)dev
, (double)inode
, fsp
->fh
->file_id
);
339 dbgtext( "Allowing break to succeed regardless.\n" );
347 static void oplock_timeout_handler(struct event_context
*ctx
,
348 struct timed_event
*te
,
349 const struct timeval
*now
,
352 files_struct
*fsp
= (files_struct
*)private_data
;
354 /* Remove the timed event handler. */
355 TALLOC_FREE(fsp
->oplock_timeout
);
356 DEBUG(0, ("Oplock break failed for file %s -- replying anyway\n", fsp
->fsp_name
));
357 global_client_failed_oplock_break
= True
;
359 reply_to_oplock_break_requests(fsp
);
362 /*******************************************************************
363 Add a timeout handler waiting for the client reply.
364 *******************************************************************/
366 static void add_oplock_timeout_handler(files_struct
*fsp
)
368 if (fsp
->oplock_timeout
!= NULL
) {
369 DEBUG(0, ("Logic problem -- have an oplock event hanging "
373 fsp
->oplock_timeout
=
374 event_add_timed(smbd_event_context(), NULL
,
375 timeval_current_ofs(OPLOCK_BREAK_TIMEOUT
, 0),
376 "oplock_timeout_handler",
377 oplock_timeout_handler
, fsp
);
379 if (fsp
->oplock_timeout
== NULL
) {
380 DEBUG(0, ("Could not add oplock timeout handler\n"));
384 /*******************************************************************
385 This handles the case of a write triggering a break to none
386 message on a level2 oplock.
387 When we get this message we may be in any of three states :
388 NO_OPLOCK, LEVEL_II, FAKE_LEVEL2. We only send a message to
389 the client for LEVEL2.
390 *******************************************************************/
392 static void process_oplock_async_level2_break_message(int msg_type
, struct process_id src
,
393 void *buf
, size_t len
,
396 struct share_mode_entry msg
;
402 DEBUG(0, ("Got NULL buffer\n"));
406 if (len
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
407 DEBUG(0, ("Got invalid msg len %d\n", (int)len
));
411 /* De-linearize incoming message. */
412 message_to_share_mode_entry(&msg
, (char *)buf
);
414 DEBUG(10, ("Got oplock async level 2 break message from pid %d: 0x%x/%.0f/%lu\n",
415 (int)procid_to_pid(&src
), (unsigned int)msg
.dev
,
416 (double)msg
.inode
, msg
.share_file_id
));
418 fsp
= initial_break_processing(msg
.dev
, msg
.inode
,
422 /* We hit a race here. Break messages are sent, and before we
423 * get to process this message, we have closed the file.
424 * No need to reply as this is an async message. */
425 DEBUG(3, ("process_oplock_async_level2_break_message: Did not find fsp, ignoring\n"));
429 if (fsp
->oplock_type
== NO_OPLOCK
) {
430 /* We already got a "break to none" message and we've handled it.
432 DEBUG(3, ("process_oplock_async_level2_break_message: already broken to none, ignoring.\n"));
436 if (fsp
->oplock_type
== FAKE_LEVEL_II_OPLOCK
) {
437 /* Don't tell the client, just downgrade. */
438 DEBUG(3, ("process_oplock_async_level2_break_message: downgrading fake level 2 oplock.\n"));
443 /* Ensure we're really at level2 state. */
444 SMB_ASSERT(fsp
->oplock_type
== LEVEL_II_OPLOCK
);
446 /* Now send a break to none message to our client. */
448 break_msg
= new_break_smb_message(NULL
, fsp
, OPLOCKLEVEL_NONE
);
449 if (break_msg
== NULL
) {
450 exit_server("Could not talloc break_msg\n");
453 /* Need to wait before sending a break message if we sent ourselves this message. */
454 if (procid_to_pid(&src
) == sys_getpid()) {
455 wait_before_sending_break();
458 /* Save the server smb signing state. */
459 sign_state
= srv_oplock_set_signing(False
);
462 if (!send_smb(smbd_server_fd(), break_msg
)) {
463 exit_server_cleanly("oplock_break: send_smb failed.");
466 /* Restore the sign state to what it was. */
467 srv_oplock_set_signing(sign_state
);
469 TALLOC_FREE(break_msg
);
471 /* Async level2 request, don't send a reply, just remove the oplock. */
475 /*******************************************************************
476 This handles the generic oplock break message from another smbd.
477 *******************************************************************/
479 static void process_oplock_break_message(int msg_type
, struct process_id src
,
480 void *buf
, size_t len
,
483 struct share_mode_entry msg
;
486 BOOL break_to_level2
= False
;
490 DEBUG(0, ("Got NULL buffer\n"));
494 if (len
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
495 DEBUG(0, ("Got invalid msg len %d\n", (int)len
));
499 /* De-linearize incoming message. */
500 message_to_share_mode_entry(&msg
, (char *)buf
);
502 DEBUG(10, ("Got oplock break message from pid %d: 0x%x/%.0f/%lu\n",
503 (int)procid_to_pid(&src
), (unsigned int)msg
.dev
,
504 (double)msg
.inode
, msg
.share_file_id
));
506 fsp
= initial_break_processing(msg
.dev
, msg
.inode
,
510 /* a We hit race here. Break messages are sent, and before we
511 * get to process this message, we have closed the file. Reply
512 * with 'ok, oplock broken' */
513 DEBUG(3, ("Did not find fsp\n"));
515 /* We just send the same message back. */
516 message_send_pid(src
, MSG_SMB_BREAK_RESPONSE
,
517 buf
, MSG_SMB_SHARE_MODE_ENTRY_SIZE
, True
);
521 if (fsp
->sent_oplock_break
!= NO_BREAK_SENT
) {
522 /* Remember we have to inform the requesting PID when the
525 ADD_TO_ARRAY(NULL
, struct share_mode_entry
, msg
,
526 &fsp
->pending_break_messages
,
527 &fsp
->num_pending_break_messages
);
531 if (EXCLUSIVE_OPLOCK_TYPE(msg
.op_type
) &&
532 !EXCLUSIVE_OPLOCK_TYPE(fsp
->oplock_type
)) {
533 DEBUG(3, ("Already downgraded oplock on 0x%x/%.0f: %s\n",
534 (unsigned int)fsp
->dev
, (double)fsp
->inode
,
536 /* We just send the same message back. */
537 message_send_pid(src
, MSG_SMB_BREAK_RESPONSE
,
538 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_cleanly("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
,
594 unsigned long file_id
;
600 DEBUG(0, ("Got NULL buffer\n"));
604 if (len
!= MSG_SMB_KERNEL_BREAK_SIZE
) {
605 DEBUG(0, ("Got invalid msg len %d\n", (int)len
));
609 /* Pull the data from the message. */
610 dev
= DEV_T_VAL(buf
, 0);
611 inode
= INO_T_VAL(buf
, 8);
612 file_id
= (unsigned long)IVAL(buf
, 16);
614 DEBUG(10, ("Got kernel oplock break message from pid %d: 0x%x/%.0f/%u\n",
615 (int)procid_to_pid(&src
), (unsigned int)dev
, (double)inode
,
616 (unsigned int)file_id
));
618 fsp
= initial_break_processing(dev
, inode
, file_id
);
621 DEBUG(3, ("Got a kernel oplock break message for a file "
622 "I don't know about\n"));
626 if (fsp
->sent_oplock_break
!= NO_BREAK_SENT
) {
627 /* This is ok, kernel oplocks come in completely async */
628 DEBUG(3, ("Got a kernel oplock request while waiting for a "
633 break_msg
= new_break_smb_message(NULL
, fsp
, OPLOCKLEVEL_NONE
);
634 if (break_msg
== NULL
) {
635 exit_server("Could not talloc break_msg\n");
638 /* Save the server smb signing state. */
639 sign_state
= srv_oplock_set_signing(False
);
642 if (!send_smb(smbd_server_fd(), break_msg
)) {
643 exit_server_cleanly("oplock_break: send_smb failed.");
646 /* Restore the sign state to what it was. */
647 srv_oplock_set_signing(sign_state
);
649 TALLOC_FREE(break_msg
);
651 fsp
->sent_oplock_break
= BREAK_TO_NONE_SENT
;
653 add_oplock_timeout_handler(fsp
);
656 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
);
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(int msg_type
, struct process_id src
,
681 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
, (char *)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
,
712 struct share_mode_entry msg
;
715 DEBUG(0, ("Got NULL buffer\n"));
719 if (len
!= MSG_SMB_SHARE_MODE_ENTRY_SIZE
) {
720 DEBUG(0, ("Got invalid msg len %d\n", (int)len
));
724 /* De-linearize incoming message. */
725 message_to_share_mode_entry(&msg
, (char *)buf
);
727 DEBUG(10, ("Got open retry msg from pid %d: 0x%x/%.0f/%lu mid %u\n",
728 (int)procid_to_pid(&src
), (unsigned int)msg
.dev
,
729 (double)msg
.inode
, msg
.share_file_id
,
730 (unsigned int)msg
.op_mid
));
732 schedule_deferred_open_smb_message(msg
.op_mid
);
735 /****************************************************************************
736 This function is called on any file modification or lock request. If a file
737 is level 2 oplocked then it must tell all other level 2 holders to break to
739 ****************************************************************************/
741 void release_level_2_oplocks_on_change(files_struct
*fsp
)
744 struct share_mode_lock
*lck
;
747 * If this file is level II oplocked then we need
748 * to grab the shared memory lock and inform all
749 * other files with a level II lock that they need
750 * to flush their read caches. We keep the lock over
751 * the shared memory area whilst doing this.
754 if (!LEVEL_II_OPLOCK_TYPE(fsp
->oplock_type
))
757 lck
= get_share_mode_lock(NULL
, fsp
->dev
, fsp
->inode
, NULL
, NULL
);
759 DEBUG(0,("release_level_2_oplocks_on_change: failed to lock "
760 "share mode entry for file %s.\n", fsp
->fsp_name
));
764 DEBUG(10,("release_level_2_oplocks_on_change: num_share_modes = %d\n",
765 lck
->num_share_modes
));
767 for(i
= 0; i
< lck
->num_share_modes
; i
++) {
768 struct share_mode_entry
*share_entry
= &lck
->share_modes
[i
];
769 char msg
[MSG_SMB_SHARE_MODE_ENTRY_SIZE
];
771 if (!is_valid_share_mode_entry(share_entry
)) {
776 * As there could have been multiple writes waiting at the
777 * lock_share_entry gate we may not be the first to
778 * enter. Hence the state of the op_types in the share mode
779 * entries may be partly NO_OPLOCK and partly LEVEL_II or FAKE_LEVEL_II
780 * oplock. It will do no harm to re-send break messages to
781 * those smbd's that are still waiting their turn to remove
782 * their LEVEL_II state, and also no harm to ignore existing
783 * NO_OPLOCK states. JRA.
786 DEBUG(10,("release_level_2_oplocks_on_change: "
787 "share_entry[%i]->op_type == %d\n",
788 i
, share_entry
->op_type
));
790 if (share_entry
->op_type
== NO_OPLOCK
) {
795 if (EXCLUSIVE_OPLOCK_TYPE(share_entry
->op_type
)) {
796 DEBUG(0,("release_level_2_oplocks_on_change: PANIC. "
797 "share mode entry %d is an exlusive "
803 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
);
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 SDEV_T_VAL(msg
,28,e
->dev
);
830 SINO_T_VAL(msg
,36,e
->inode
);
831 SIVAL(msg
,44,e
->share_file_id
);
832 SIVAL(msg
,48,e
->uid
);
833 SSVAL(msg
,52,e
->flags
);
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);
854 e
->flags
= (uint16
)SVAL(msg
,52);
857 /****************************************************************************
858 Setup oplocks for this process.
859 ****************************************************************************/
861 BOOL
init_oplocks(void)
863 DEBUG(3,("init_oplocks: initializing messages.\n"));
865 message_register(MSG_SMB_BREAK_REQUEST
,
866 process_oplock_break_message
,
868 message_register(MSG_SMB_ASYNC_LEVEL2_BREAK
,
869 process_oplock_async_level2_break_message
,
871 message_register(MSG_SMB_BREAK_RESPONSE
,
872 process_oplock_break_response
,
874 message_register(MSG_SMB_KERNEL_BREAK
,
875 process_kernel_oplock_break
,
877 message_register(MSG_SMB_OPEN_RETRY
,
878 process_open_retry_message
,
881 if (lp_kernel_oplocks()) {
882 #if HAVE_KERNEL_OPLOCKS_IRIX
883 koplocks
= irix_init_kernel_oplocks();
884 #elif HAVE_KERNEL_OPLOCKS_LINUX
885 koplocks
= linux_init_kernel_oplocks();