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(NULL,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 event_context *ctx,
346 struct timed_event *te,
347 const struct timeval *now,
350 files_struct *fsp = (files_struct *)private_data;
352 /* Ensure we always remove this event. */
353 if (fsp->oplock_timeout != NULL) {
354 /* Remove the timed event handler. */
355 TALLOC_FREE(fsp->oplock_timeout);
356 fsp->oplock_timeout = NULL;
358 DEBUG(0, ("Oplock break failed for file %s -- replying anyway\n", fsp->fsp_name));
359 global_client_failed_oplock_break = True;
361 reply_to_oplock_break_requests(fsp);
364 /*******************************************************************
365 Add a timeout handler waiting for the client reply.
366 *******************************************************************/
368 static void add_oplock_timeout_handler(files_struct *fsp)
370 if (fsp->oplock_timeout != NULL) {
371 DEBUG(0, ("Logic problem -- have an oplock event hanging "
375 fsp->oplock_timeout =
376 event_add_timed(smbd_event_context(), NULL,
377 timeval_current_ofs(OPLOCK_BREAK_TIMEOUT, 0),
378 "oplock_timeout_handler",
379 oplock_timeout_handler, fsp);
381 if (fsp->oplock_timeout == NULL) {
382 DEBUG(0, ("Could not add oplock timeout handler\n"));
386 /*******************************************************************
387 This handles the case of a write triggering a break to none
388 message on a level2 oplock.
389 When we get this message we may be in any of three states :
390 NO_OPLOCK, LEVEL_II, FAKE_LEVEL2. We only send a message to
391 the client for LEVEL2.
392 *******************************************************************/
394 static void process_oplock_async_level2_break_message(int msg_type, struct process_id src,
395 void *buf, size_t len,
398 struct share_mode_entry msg;
404 DEBUG(0, ("Got NULL buffer\n"));
408 if (len != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
409 DEBUG(0, ("Got invalid msg len %d\n", (int)len));
413 /* De-linearize incoming message. */
414 message_to_share_mode_entry(&msg, (char *)buf);
416 DEBUG(10, ("Got oplock async level 2 break message from pid %d: 0x%x/%.0f/%lu\n",
417 (int)procid_to_pid(&src), (unsigned int)msg.dev,
418 (double)msg.inode, msg.share_file_id));
420 fsp = initial_break_processing(msg.dev, msg.inode,
424 /* We hit a race here. Break messages are sent, and before we
425 * get to process this message, we have closed the file.
426 * No need to reply as this is an async message. */
427 DEBUG(3, ("process_oplock_async_level2_break_message: Did not find fsp, ignoring\n"));
431 if (fsp->oplock_type == NO_OPLOCK) {
432 /* We already got a "break to none" message and we've handled it.
434 DEBUG(3, ("process_oplock_async_level2_break_message: already broken to none, ignoring.\n"));
438 if (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
439 /* Don't tell the client, just downgrade. */
440 DEBUG(3, ("process_oplock_async_level2_break_message: downgrading fake level 2 oplock.\n"));
445 /* Ensure we're really at level2 state. */
446 SMB_ASSERT(fsp->oplock_type == LEVEL_II_OPLOCK);
448 /* Now send a break to none message to our client. */
450 break_msg = new_break_smb_message(NULL, fsp, OPLOCKLEVEL_NONE);
451 if (break_msg == NULL) {
452 exit_server("Could not talloc break_msg\n");
455 /* Need to wait before sending a break message if we sent ourselves this message. */
456 if (procid_to_pid(&src) == sys_getpid()) {
457 wait_before_sending_break();
460 /* Save the server smb signing state. */
461 sign_state = srv_oplock_set_signing(False);
464 if (!send_smb(smbd_server_fd(), break_msg)) {
465 exit_server_cleanly("oplock_break: send_smb failed.");
468 /* Restore the sign state to what it was. */
469 srv_oplock_set_signing(sign_state);
471 TALLOC_FREE(break_msg);
473 /* Async level2 request, don't send a reply, just remove the oplock. */
477 /*******************************************************************
478 This handles the generic oplock break message from another smbd.
479 *******************************************************************/
481 static void process_oplock_break_message(int msg_type, struct process_id src,
482 void *buf, size_t len,
485 struct share_mode_entry msg;
488 BOOL break_to_level2 = False;
492 DEBUG(0, ("Got NULL buffer\n"));
496 if (len != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
497 DEBUG(0, ("Got invalid msg len %d\n", (int)len));
501 /* De-linearize incoming message. */
502 message_to_share_mode_entry(&msg, (char *)buf);
504 DEBUG(10, ("Got oplock break message from pid %d: 0x%x/%.0f/%lu\n",
505 (int)procid_to_pid(&src), (unsigned int)msg.dev,
506 (double)msg.inode, msg.share_file_id));
508 fsp = initial_break_processing(msg.dev, msg.inode,
512 /* a We hit race here. Break messages are sent, and before we
513 * get to process this message, we have closed the file. Reply
514 * with 'ok, oplock broken' */
515 DEBUG(3, ("Did not find fsp\n"));
517 /* We just send the same message back. */
518 message_send_pid(src, MSG_SMB_BREAK_RESPONSE,
519 buf, MSG_SMB_SHARE_MODE_ENTRY_SIZE, True);
523 if (fsp->sent_oplock_break != NO_BREAK_SENT) {
524 /* Remember we have to inform the requesting PID when the
527 ADD_TO_ARRAY(NULL, struct share_mode_entry, msg,
528 &fsp->pending_break_messages,
529 &fsp->num_pending_break_messages);
533 if (EXCLUSIVE_OPLOCK_TYPE(msg.op_type) &&
534 !EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
535 DEBUG(3, ("Already downgraded oplock on 0x%x/%.0f: %s\n",
536 (unsigned int)fsp->dev, (double)fsp->inode,
538 /* We just send the same message back. */
539 message_send_pid(src, MSG_SMB_BREAK_RESPONSE,
540 buf, MSG_SMB_SHARE_MODE_ENTRY_SIZE, True);
544 if ((global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
545 !(msg.op_type & FORCE_OPLOCK_BREAK_TO_NONE) &&
546 !koplocks && /* NOTE: we force levelII off for kernel oplocks -
547 * this will change when it is supported */
548 lp_level2_oplocks(SNUM(fsp->conn))) {
549 break_to_level2 = True;
552 break_msg = new_break_smb_message(NULL, fsp, break_to_level2 ?
553 OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
554 if (break_msg == NULL) {
555 exit_server("Could not talloc break_msg\n");
558 /* Need to wait before sending a break message if we sent ourselves this message. */
559 if (procid_to_pid(&src) == sys_getpid()) {
560 wait_before_sending_break();
563 /* Save the server smb signing state. */
564 sign_state = srv_oplock_set_signing(False);
567 if (!send_smb(smbd_server_fd(), break_msg)) {
568 exit_server_cleanly("oplock_break: send_smb failed.");
571 /* Restore the sign state to what it was. */
572 srv_oplock_set_signing(sign_state);
574 TALLOC_FREE(break_msg);
576 fsp->sent_oplock_break = break_to_level2 ? LEVEL_II_BREAK_SENT:BREAK_TO_NONE_SENT;
579 ADD_TO_ARRAY(NULL, struct share_mode_entry, msg,
580 &fsp->pending_break_messages,
581 &fsp->num_pending_break_messages);
583 add_oplock_timeout_handler(fsp);
586 /*******************************************************************
587 This handles the kernel oplock break message.
588 *******************************************************************/
590 static void process_kernel_oplock_break(int msg_type, struct process_id src,
591 void *buf, size_t len,
596 unsigned long file_id;
602 DEBUG(0, ("Got NULL buffer\n"));
606 if (len != MSG_SMB_KERNEL_BREAK_SIZE) {
607 DEBUG(0, ("Got invalid msg len %d\n", (int)len));
611 /* Pull the data from the message. */
612 dev = DEV_T_VAL(buf, 0);
613 inode = INO_T_VAL(buf, 8);
614 file_id = (unsigned long)IVAL(buf, 16);
616 DEBUG(10, ("Got kernel oplock break message from pid %d: 0x%x/%.0f/%u\n",
617 (int)procid_to_pid(&src), (unsigned int)dev, (double)inode,
618 (unsigned int)file_id));
620 fsp = initial_break_processing(dev, inode, file_id);
623 DEBUG(3, ("Got a kernel oplock break message for a file "
624 "I don't know about\n"));
628 if (fsp->sent_oplock_break != NO_BREAK_SENT) {
629 /* This is ok, kernel oplocks come in completely async */
630 DEBUG(3, ("Got a kernel oplock request while waiting for a "
635 break_msg = new_break_smb_message(NULL, fsp, OPLOCKLEVEL_NONE);
636 if (break_msg == NULL) {
637 exit_server("Could not talloc break_msg\n");
640 /* Save the server smb signing state. */
641 sign_state = srv_oplock_set_signing(False);
644 if (!send_smb(smbd_server_fd(), break_msg)) {
645 exit_server_cleanly("oplock_break: send_smb failed.");
648 /* Restore the sign state to what it was. */
649 srv_oplock_set_signing(sign_state);
651 TALLOC_FREE(break_msg);
653 fsp->sent_oplock_break = BREAK_TO_NONE_SENT;
655 add_oplock_timeout_handler(fsp);
658 void reply_to_oplock_break_requests(files_struct *fsp)
662 for (i=0; i<fsp->num_pending_break_messages; i++) {
663 struct share_mode_entry *e = &fsp->pending_break_messages[i];
664 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
666 share_mode_entry_to_message(msg, e);
668 message_send_pid(e->pid, MSG_SMB_BREAK_RESPONSE,
669 msg, MSG_SMB_SHARE_MODE_ENTRY_SIZE, True);
672 SAFE_FREE(fsp->pending_break_messages);
673 fsp->num_pending_break_messages = 0;
674 if (fsp->oplock_timeout != NULL) {
675 /* Remove the timed event handler. */
676 TALLOC_FREE(fsp->oplock_timeout);
677 fsp->oplock_timeout = NULL;
682 static void process_oplock_break_response(int msg_type, struct process_id src,
683 void *buf, size_t len,
686 struct share_mode_entry msg;
689 DEBUG(0, ("Got NULL buffer\n"));
693 if (len != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
694 DEBUG(0, ("Got invalid msg len %u\n", (unsigned int)len));
698 /* De-linearize incoming message. */
699 message_to_share_mode_entry(&msg, (char *)buf);
701 DEBUG(10, ("Got oplock break response from pid %d: 0x%x/%.0f/%lu mid %u\n",
702 (int)procid_to_pid(&src), (unsigned int)msg.dev,
703 (double)msg.inode, 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(int msg_type, struct process_id src,
711 void *buf, size_t len,
714 struct share_mode_entry msg;
717 DEBUG(0, ("Got NULL buffer\n"));
721 if (len != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
722 DEBUG(0, ("Got invalid msg len %d\n", (int)len));
726 /* De-linearize incoming message. */
727 message_to_share_mode_entry(&msg, (char *)buf);
729 DEBUG(10, ("Got open retry msg from pid %d: 0x%x/%.0f/%lu mid %u\n",
730 (int)procid_to_pid(&src), (unsigned int)msg.dev,
731 (double)msg.inode, msg.share_file_id,
732 (unsigned int)msg.op_mid));
734 schedule_deferred_open_smb_message(msg.op_mid);
737 /****************************************************************************
738 This function is called on any file modification or lock request. If a file
739 is level 2 oplocked then it must tell all other level 2 holders to break to
741 ****************************************************************************/
743 void release_level_2_oplocks_on_change(files_struct *fsp)
746 struct share_mode_lock *lck;
749 * If this file is level II oplocked then we need
750 * to grab the shared memory lock and inform all
751 * other files with a level II lock that they need
752 * to flush their read caches. We keep the lock over
753 * the shared memory area whilst doing this.
756 if (!LEVEL_II_OPLOCK_TYPE(fsp->oplock_type))
759 lck = get_share_mode_lock(NULL, fsp->dev, fsp->inode, NULL, NULL);
761 DEBUG(0,("release_level_2_oplocks_on_change: failed to lock "
762 "share mode entry for file %s.\n", fsp->fsp_name ));
766 DEBUG(10,("release_level_2_oplocks_on_change: num_share_modes = %d\n",
767 lck->num_share_modes ));
769 for(i = 0; i < lck->num_share_modes; i++) {
770 struct share_mode_entry *share_entry = &lck->share_modes[i];
771 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
773 if (!is_valid_share_mode_entry(share_entry)) {
778 * As there could have been multiple writes waiting at the
779 * lock_share_entry gate we may not be the first to
780 * enter. Hence the state of the op_types in the share mode
781 * entries may be partly NO_OPLOCK and partly LEVEL_II or FAKE_LEVEL_II
782 * oplock. It will do no harm to re-send break messages to
783 * those smbd's that are still waiting their turn to remove
784 * their LEVEL_II state, and also no harm to ignore existing
785 * NO_OPLOCK states. JRA.
788 DEBUG(10,("release_level_2_oplocks_on_change: "
789 "share_entry[%i]->op_type == %d\n",
790 i, share_entry->op_type ));
792 if (share_entry->op_type == NO_OPLOCK) {
797 if (EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) {
798 DEBUG(0,("release_level_2_oplocks_on_change: PANIC. "
799 "share mode entry %d is an exlusive "
805 share_mode_entry_to_message(msg, share_entry);
807 message_send_pid(share_entry->pid, MSG_SMB_ASYNC_LEVEL2_BREAK,
808 msg, MSG_SMB_SHARE_MODE_ENTRY_SIZE, True);
811 /* We let the message receivers handle removing the oplock state
812 in the share mode lock db. */
817 /****************************************************************************
818 Linearize a share mode entry struct to an internal oplock break message.
819 ****************************************************************************/
821 void share_mode_entry_to_message(char *msg, struct share_mode_entry *e)
823 SIVAL(msg,0,(uint32)e->pid.pid);
824 SSVAL(msg,4,e->op_mid);
825 SSVAL(msg,6,e->op_type);
826 SIVAL(msg,8,e->access_mask);
827 SIVAL(msg,12,e->share_access);
828 SIVAL(msg,16,e->private_options);
829 SIVAL(msg,20,(uint32)e->time.tv_sec);
830 SIVAL(msg,24,(uint32)e->time.tv_usec);
831 SDEV_T_VAL(msg,28,e->dev);
832 SINO_T_VAL(msg,36,e->inode);
833 SIVAL(msg,44,e->share_file_id);
834 SIVAL(msg,48,e->uid);
835 SSVAL(msg,52,e->flags);
838 /****************************************************************************
839 De-linearize an internal oplock break message to a share mode entry struct.
840 ****************************************************************************/
842 void message_to_share_mode_entry(struct share_mode_entry *e, char *msg)
844 e->pid.pid = (pid_t)IVAL(msg,0);
845 e->op_mid = SVAL(msg,4);
846 e->op_type = SVAL(msg,6);
847 e->access_mask = IVAL(msg,8);
848 e->share_access = IVAL(msg,12);
849 e->private_options = IVAL(msg,16);
850 e->time.tv_sec = (time_t)IVAL(msg,20);
851 e->time.tv_usec = (int)IVAL(msg,24);
852 e->dev = DEV_T_VAL(msg,28);
853 e->inode = INO_T_VAL(msg,36);
854 e->share_file_id = (unsigned long)IVAL(msg,44);
855 e->uid = (uint32)IVAL(msg,48);
856 e->flags = (uint16)SVAL(msg,52);
859 /****************************************************************************
860 Setup oplocks for this process.
861 ****************************************************************************/
863 BOOL init_oplocks(void)
865 DEBUG(3,("init_oplocks: initializing messages.\n"));
867 message_register(MSG_SMB_BREAK_REQUEST,
868 process_oplock_break_message,
870 message_register(MSG_SMB_ASYNC_LEVEL2_BREAK,
871 process_oplock_async_level2_break_message,
873 message_register(MSG_SMB_BREAK_RESPONSE,
874 process_oplock_break_response,
876 message_register(MSG_SMB_KERNEL_BREAK,
877 process_kernel_oplock_break,
879 message_register(MSG_SMB_OPEN_RETRY,
880 process_open_retry_message,
883 if (lp_kernel_oplocks()) {
884 #if HAVE_KERNEL_OPLOCKS_IRIX
885 koplocks = irix_init_kernel_oplocks();
886 #elif HAVE_KERNEL_OPLOCKS_LINUX
887 koplocks = linux_init_kernel_oplocks();