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 !koplocks && /* NOTE: we force levelII off for kernel oplocks -
544 * this will change when it is supported */
545 lp_level2_oplocks(SNUM(fsp->conn))) {
546 break_to_level2 = True;
549 break_msg = new_break_smb_message(NULL, fsp, break_to_level2 ?
550 OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
551 if (break_msg == NULL) {
552 exit_server("Could not talloc break_msg\n");
555 /* Need to wait before sending a break message if we sent ourselves this message. */
556 if (procid_to_pid(&src) == sys_getpid()) {
557 wait_before_sending_break();
560 /* Save the server smb signing state. */
561 sign_state = srv_oplock_set_signing(False);
564 if (!send_smb(smbd_server_fd(), break_msg)) {
565 exit_server("oplock_break: send_smb failed.");
568 /* Restore the sign state to what it was. */
569 srv_oplock_set_signing(sign_state);
571 TALLOC_FREE(break_msg);
573 fsp->sent_oplock_break = break_to_level2 ? LEVEL_II_BREAK_SENT:BREAK_TO_NONE_SENT;
576 ADD_TO_ARRAY(NULL, struct share_mode_entry, msg,
577 &fsp->pending_break_messages,
578 &fsp->num_pending_break_messages);
580 add_oplock_timeout_handler(fsp);
583 /*******************************************************************
584 This handles the kernel oplock break message.
585 *******************************************************************/
587 static void process_kernel_oplock_break(int msg_type, struct process_id src,
588 void *buf, size_t len)
592 unsigned long file_id;
598 DEBUG(0, ("Got NULL buffer\n"));
602 if (len != MSG_SMB_KERNEL_BREAK_SIZE) {
603 DEBUG(0, ("Got invalid msg len %d\n", (int)len));
607 /* Pull the data from the message. */
608 dev = DEV_T_VAL(buf, 0);
609 inode = INO_T_VAL(buf, 8);
610 file_id = (unsigned long)IVAL(buf, 16);
612 DEBUG(10, ("Got kernel oplock break message from pid %d: 0x%x/%.0f/%u\n",
613 (int)procid_to_pid(&src), (unsigned int)dev, (double)inode,
614 (unsigned int)file_id));
616 fsp = initial_break_processing(dev, inode, file_id);
619 DEBUG(3, ("Got a kernel oplock break message for a file "
620 "I don't know about\n"));
624 if (fsp->sent_oplock_break != NO_BREAK_SENT) {
625 /* This is ok, kernel oplocks come in completely async */
626 DEBUG(3, ("Got a kernel oplock request while waiting for a "
631 break_msg = new_break_smb_message(NULL, fsp, OPLOCKLEVEL_NONE);
632 if (break_msg == NULL) {
633 exit_server("Could not talloc break_msg\n");
636 /* Save the server smb signing state. */
637 sign_state = srv_oplock_set_signing(False);
640 if (!send_smb(smbd_server_fd(), break_msg)) {
641 exit_server("oplock_break: 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)
659 for (i=0; i<fsp->num_pending_break_messages; i++) {
660 struct share_mode_entry *e = &fsp->pending_break_messages[i];
661 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
663 share_mode_entry_to_message(msg, e);
665 message_send_pid(e->pid, MSG_SMB_BREAK_RESPONSE,
666 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)
683 struct share_mode_entry msg;
686 DEBUG(0, ("Got NULL buffer\n"));
690 if (len != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
691 DEBUG(0, ("Got invalid msg len %u\n", (unsigned int)len));
695 /* De-linearize incoming message. */
696 message_to_share_mode_entry(&msg, buf);
698 DEBUG(10, ("Got oplock break response from pid %d: 0x%x/%.0f/%lu mid %u\n",
699 (int)procid_to_pid(&src), (unsigned int)msg.dev,
700 (double)msg.inode, msg.share_file_id,
701 (unsigned int)msg.op_mid));
703 /* Here's the hack from open.c, store the mid in the 'port' field */
704 schedule_deferred_open_smb_message(msg.op_mid);
707 static void process_open_retry_message(int msg_type, struct process_id src,
708 void *buf, size_t len)
710 struct share_mode_entry msg;
713 DEBUG(0, ("Got NULL buffer\n"));
717 if (len != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
718 DEBUG(0, ("Got invalid msg len %d\n", (int)len));
722 /* De-linearize incoming message. */
723 message_to_share_mode_entry(&msg, buf);
725 DEBUG(10, ("Got open retry msg from pid %d: 0x%x/%.0f/%lu mid %u\n",
726 (int)procid_to_pid(&src), (unsigned int)msg.dev,
727 (double)msg.inode, msg.share_file_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->dev, fsp->inode, 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);
804 message_send_pid(share_entry->pid, MSG_SMB_ASYNC_LEVEL2_BREAK,
805 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);
834 /****************************************************************************
835 De-linearize an internal oplock break message to a share mode entry struct.
836 ****************************************************************************/
838 void message_to_share_mode_entry(struct share_mode_entry *e, char *msg)
840 e->pid.pid = (pid_t)IVAL(msg,0);
841 e->op_mid = SVAL(msg,4);
842 e->op_type = SVAL(msg,6);
843 e->access_mask = IVAL(msg,8);
844 e->share_access = IVAL(msg,12);
845 e->private_options = IVAL(msg,16);
846 e->time.tv_sec = (time_t)IVAL(msg,20);
847 e->time.tv_usec = (int)IVAL(msg,24);
848 e->dev = DEV_T_VAL(msg,28);
849 e->inode = INO_T_VAL(msg,36);
850 e->share_file_id = (unsigned long)IVAL(msg,44);
853 /****************************************************************************
854 Setup oplocks for this process.
855 ****************************************************************************/
857 BOOL init_oplocks(void)
859 DEBUG(3,("open_oplock_ipc: initializing messages.\n"));
861 message_register(MSG_SMB_BREAK_REQUEST,
862 process_oplock_break_message);
863 message_register(MSG_SMB_ASYNC_LEVEL2_BREAK,
864 process_oplock_async_level2_break_message);
865 message_register(MSG_SMB_BREAK_RESPONSE,
866 process_oplock_break_response);
867 message_register(MSG_SMB_KERNEL_BREAK,
868 process_kernel_oplock_break);
869 message_register(MSG_SMB_OPEN_RETRY,
870 process_open_retry_message);
872 if (lp_kernel_oplocks()) {
873 #if HAVE_KERNEL_OPLOCKS_IRIX
874 koplocks = irix_init_kernel_oplocks();
875 #elif HAVE_KERNEL_OPLOCKS_LINUX
876 koplocks = linux_init_kernel_oplocks();