2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1998 - 2001
6 Copyright (C) Volker Lendecke 2005
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #define DBGC_CLASS DBGC_LOCKING
25 /* Current number of oplocks we have outstanding. */
26 static int32 exclusive_oplocks_open = 0;
27 static int32 level_II_oplocks_open = 0;
28 bool global_client_failed_oplock_break = False;
30 extern uint32 global_client_caps;
32 static struct kernel_oplocks *koplocks;
34 /****************************************************************************
35 Get the number of current exclusive oplocks.
36 ****************************************************************************/
38 int32 get_number_of_exclusive_open_oplocks(void)
40 return exclusive_oplocks_open;
43 /****************************************************************************
44 Return True if an oplock message is pending.
45 ****************************************************************************/
47 bool oplock_message_waiting(fd_set *fds)
49 if (koplocks && koplocks->msg_waiting(fds)) {
56 /****************************************************************************
57 Find out if there are any kernel oplock messages waiting and process them
58 if so. pfds is the fd_set from the main select loop (which contains any
59 kernel oplock fd if that's what the system uses (IRIX). If may be NULL if
60 we're calling this in a shutting down state.
61 ****************************************************************************/
63 void process_kernel_oplocks(struct messaging_context *msg_ctx, fd_set *pfds)
66 * We need to check for kernel oplocks before going into the select
67 * here, as the EINTR generated by the linux kernel oplock may have
68 * already been eaten. JRA.
75 while (koplocks->msg_waiting(pfds)) {
77 char msg[MSG_SMB_KERNEL_BREAK_SIZE];
79 fsp = koplocks->receive_message(pfds);
82 DEBUG(3, ("Kernel oplock message announced, but none "
87 /* Put the kernel break info into the message. */
88 push_file_id_16(msg, &fsp->file_id);
89 SIVAL(msg,16,fsp->fh->gen_id);
91 /* Don't need to be root here as we're only ever
92 sending to ourselves. */
94 messaging_send_buf(msg_ctx, procid_self(),
96 (uint8 *)&msg, MSG_SMB_KERNEL_BREAK_SIZE);
100 /****************************************************************************
101 Attempt to set an oplock on a file. Always succeeds if kernel oplocks are
102 disabled (just sets flags). Returns True if oplock set.
103 ****************************************************************************/
105 bool set_file_oplock(files_struct *fsp, int oplock_type)
107 if (koplocks && !koplocks->set_oplock(fsp, oplock_type)) {
111 fsp->oplock_type = oplock_type;
112 fsp->sent_oplock_break = NO_BREAK_SENT;
113 if (oplock_type == LEVEL_II_OPLOCK) {
114 level_II_oplocks_open++;
116 exclusive_oplocks_open++;
119 DEBUG(5,("set_file_oplock: granted oplock on file %s, %s/%lu, "
120 "tv_sec = %x, tv_usec = %x\n",
121 fsp->fsp_name, file_id_string_tos(&fsp->file_id),
122 fsp->fh->gen_id, (int)fsp->open_time.tv_sec,
123 (int)fsp->open_time.tv_usec ));
128 /****************************************************************************
129 Attempt to release an oplock on a file. Decrements oplock count.
130 ****************************************************************************/
132 void release_file_oplock(files_struct *fsp)
134 if ((fsp->oplock_type != NO_OPLOCK) &&
135 (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK) &&
137 koplocks->release_oplock(fsp);
140 if (fsp->oplock_type == LEVEL_II_OPLOCK) {
141 level_II_oplocks_open--;
142 } else if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
143 exclusive_oplocks_open--;
146 SMB_ASSERT(exclusive_oplocks_open>=0);
147 SMB_ASSERT(level_II_oplocks_open>=0);
149 fsp->oplock_type = NO_OPLOCK;
150 fsp->sent_oplock_break = NO_BREAK_SENT;
152 flush_write_cache(fsp, OPLOCK_RELEASE_FLUSH);
154 TALLOC_FREE(fsp->oplock_timeout);
157 /****************************************************************************
158 Attempt to downgrade an oplock on a file. Doesn't decrement oplock count.
159 ****************************************************************************/
161 static void downgrade_file_oplock(files_struct *fsp)
164 koplocks->release_oplock(fsp);
166 fsp->oplock_type = LEVEL_II_OPLOCK;
167 exclusive_oplocks_open--;
168 level_II_oplocks_open++;
169 fsp->sent_oplock_break = NO_BREAK_SENT;
172 /****************************************************************************
173 Remove a file oplock. Copes with level II and exclusive.
174 Locks then unlocks the share mode lock. Client can decide to go directly
175 to none even if a "break-to-level II" was sent.
176 ****************************************************************************/
178 bool remove_oplock(files_struct *fsp)
181 struct share_mode_lock *lck;
183 /* Remove the oplock flag from the sharemode. */
184 lck = get_share_mode_lock(NULL, fsp->file_id, NULL, NULL);
186 DEBUG(0,("remove_oplock: failed to lock share entry for "
187 "file %s\n", fsp->fsp_name ));
190 ret = remove_share_oplock(lck, fsp);
192 DEBUG(0,("remove_oplock: failed to remove share oplock for "
193 "file %s fnum %d, %s\n",
194 fsp->fsp_name, fsp->fnum, file_id_string_tos(&fsp->file_id)));
196 release_file_oplock(fsp);
202 * Deal with a reply when a break-to-level II was sent.
204 bool downgrade_oplock(files_struct *fsp)
207 struct share_mode_lock *lck;
209 lck = get_share_mode_lock(NULL, fsp->file_id, NULL, NULL);
211 DEBUG(0,("downgrade_oplock: failed to lock share entry for "
212 "file %s\n", fsp->fsp_name ));
215 ret = downgrade_share_oplock(lck, fsp);
217 DEBUG(0,("downgrade_oplock: failed to downgrade share oplock "
218 "for file %s fnum %d, file_id %s\n",
219 fsp->fsp_name, fsp->fnum, file_id_string_tos(&fsp->file_id)));
222 downgrade_file_oplock(fsp);
227 /****************************************************************************
228 Return the fd (if any) used for receiving oplock notifications.
229 ****************************************************************************/
231 int oplock_notify_fd(void)
234 return koplocks->notification_fd;
240 /****************************************************************************
241 Set up an oplock break message.
242 ****************************************************************************/
244 static char *new_break_smb_message(TALLOC_CTX *mem_ctx,
245 files_struct *fsp, uint8 cmd)
247 char *result = TALLOC_ARRAY(mem_ctx, char, smb_size + 8*2 + 0);
249 if (result == NULL) {
250 DEBUG(0, ("talloc failed\n"));
254 memset(result,'\0',smb_size);
255 if (!srv_encryption_on()) {
256 cli_set_message(result,8,0,true);
259 smb_set_enclen(inbuf,4,srv_enc_ctx());
260 srv_set_message(inbuf,result,8,0,true);
262 SCVAL(result,smb_com,SMBlockingX);
263 SSVAL(result,smb_tid,fsp->conn->cnum);
264 SSVAL(result,smb_pid,0xFFFF);
265 SSVAL(result,smb_uid,0);
266 SSVAL(result,smb_mid,0xFFFF);
267 SCVAL(result,smb_vwv0,0xFF);
268 SSVAL(result,smb_vwv2,fsp->fnum);
269 SCVAL(result,smb_vwv3,LOCKING_ANDX_OPLOCK_RELEASE);
270 SCVAL(result,smb_vwv3+1,cmd);
274 /****************************************************************************
275 Function to do the waiting before sending a local break.
276 ****************************************************************************/
278 static void wait_before_sending_break(void)
280 long wait_time = (long)lp_oplock_break_wait_time();
283 smb_msleep(wait_time);
287 /****************************************************************************
288 Ensure that we have a valid oplock.
289 ****************************************************************************/
291 static files_struct *initial_break_processing(struct file_id id, unsigned long file_id)
293 files_struct *fsp = NULL;
295 if( DEBUGLVL( 3 ) ) {
296 dbgtext( "initial_break_processing: called for %s/%u\n",
297 file_id_string_tos(&id), (int)file_id);
298 dbgtext( "Current oplocks_open (exclusive = %d, levelII = %d)\n",
299 exclusive_oplocks_open, level_II_oplocks_open );
303 * We need to search the file open table for the
304 * entry containing this dev and inode, and ensure
305 * we have an oplock on it.
308 fsp = file_find_dif(id, file_id);
311 /* The file could have been closed in the meantime - return success. */
312 if( DEBUGLVL( 3 ) ) {
313 dbgtext( "initial_break_processing: cannot find open file with " );
314 dbgtext( "file_id %s gen_id = %lu", file_id_string_tos(&id), file_id);
315 dbgtext( "allowing break to succeed.\n" );
320 /* Ensure we have an oplock on the file */
323 * There is a potential race condition in that an oplock could
324 * have been broken due to another udp request, and yet there are
325 * still oplock break messages being sent in the udp message
326 * queue for this file. So return true if we don't have an oplock,
327 * as we may have just freed it.
330 if(fsp->oplock_type == NO_OPLOCK) {
331 if( DEBUGLVL( 3 ) ) {
332 dbgtext( "initial_break_processing: file %s ", fsp->fsp_name );
333 dbgtext( "(file_id = %s gen_id = %lu) has no oplock.\n",
334 file_id_string_tos(&id), fsp->fh->gen_id );
335 dbgtext( "Allowing break to succeed regardless.\n" );
343 static void oplock_timeout_handler(struct event_context *ctx,
344 struct timed_event *te,
345 const struct timeval *now,
348 files_struct *fsp = (files_struct *)private_data;
350 /* Remove the timed event handler. */
351 TALLOC_FREE(fsp->oplock_timeout);
352 DEBUG(0, ("Oplock break failed for file %s -- replying anyway\n", fsp->fsp_name));
353 global_client_failed_oplock_break = True;
355 reply_to_oplock_break_requests(fsp);
358 /*******************************************************************
359 Add a timeout handler waiting for the client reply.
360 *******************************************************************/
362 static void add_oplock_timeout_handler(files_struct *fsp)
364 if (fsp->oplock_timeout != NULL) {
365 DEBUG(0, ("Logic problem -- have an oplock event hanging "
369 fsp->oplock_timeout =
370 event_add_timed(smbd_event_context(), NULL,
371 timeval_current_ofs(OPLOCK_BREAK_TIMEOUT, 0),
372 "oplock_timeout_handler",
373 oplock_timeout_handler, fsp);
375 if (fsp->oplock_timeout == NULL) {
376 DEBUG(0, ("Could not add oplock timeout handler\n"));
380 /*******************************************************************
381 This handles the case of a write triggering a break to none
382 message on a level2 oplock.
383 When we get this message we may be in any of three states :
384 NO_OPLOCK, LEVEL_II, FAKE_LEVEL2. We only send a message to
385 the client for LEVEL2.
386 *******************************************************************/
388 static void process_oplock_async_level2_break_message(struct messaging_context *msg_ctx,
391 struct server_id src,
394 struct share_mode_entry msg;
399 if (data->data == NULL) {
400 DEBUG(0, ("Got NULL buffer\n"));
404 if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
405 DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
409 /* De-linearize incoming message. */
410 message_to_share_mode_entry(&msg, (char *)data->data);
412 DEBUG(10, ("Got oplock async level 2 break message from pid %d: %s/%lu\n",
413 (int)procid_to_pid(&src), file_id_string_tos(&msg.id), msg.share_file_id));
415 fsp = initial_break_processing(msg.id, msg.share_file_id);
418 /* We hit a race here. Break messages are sent, and before we
419 * get to process this message, we have closed the file.
420 * No need to reply as this is an async message. */
421 DEBUG(3, ("process_oplock_async_level2_break_message: Did not find fsp, ignoring\n"));
425 if (fsp->oplock_type == NO_OPLOCK) {
426 /* We already got a "break to none" message and we've handled it.
428 DEBUG(3, ("process_oplock_async_level2_break_message: already broken to none, ignoring.\n"));
432 if (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
433 /* Don't tell the client, just downgrade. */
434 DEBUG(3, ("process_oplock_async_level2_break_message: downgrading fake level 2 oplock.\n"));
439 /* Ensure we're really at level2 state. */
440 SMB_ASSERT(fsp->oplock_type == LEVEL_II_OPLOCK);
442 /* Now send a break to none message to our client. */
444 break_msg = new_break_smb_message(NULL, fsp, OPLOCKLEVEL_NONE);
445 if (break_msg == NULL) {
446 exit_server("Could not talloc break_msg\n");
449 /* Need to wait before sending a break message if we sent ourselves this message. */
450 if (procid_to_pid(&src) == sys_getpid()) {
451 wait_before_sending_break();
454 /* Save the server smb signing state. */
455 sign_state = srv_oplock_set_signing(False);
458 if (!send_smb(smbd_server_fd(), break_msg)) {
459 exit_server_cleanly("oplock_break: send_smb failed.");
462 /* Restore the sign state to what it was. */
463 srv_oplock_set_signing(sign_state);
465 TALLOC_FREE(break_msg);
467 /* Async level2 request, don't send a reply, just remove the oplock. */
471 /*******************************************************************
472 This handles the generic oplock break message from another smbd.
473 *******************************************************************/
475 static void process_oplock_break_message(struct messaging_context *msg_ctx,
478 struct server_id src,
481 struct share_mode_entry msg;
484 bool break_to_level2 = False;
487 if (data->data == NULL) {
488 DEBUG(0, ("Got NULL buffer\n"));
492 if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
493 DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
497 /* De-linearize incoming message. */
498 message_to_share_mode_entry(&msg, (char *)data->data);
500 DEBUG(10, ("Got oplock break message from pid %d: %s/%lu\n",
501 (int)procid_to_pid(&src), file_id_string_tos(&msg.id), msg.share_file_id));
503 fsp = initial_break_processing(msg.id, msg.share_file_id);
506 /* a We hit race here. Break messages are sent, and before we
507 * get to process this message, we have closed the file. Reply
508 * with 'ok, oplock broken' */
509 DEBUG(3, ("Did not find fsp\n"));
511 /* We just send the same message back. */
512 messaging_send_buf(msg_ctx, src, MSG_SMB_BREAK_RESPONSE,
514 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
518 if (fsp->sent_oplock_break != NO_BREAK_SENT) {
519 /* Remember we have to inform the requesting PID when the
522 ADD_TO_ARRAY(NULL, struct share_mode_entry, msg,
523 &fsp->pending_break_messages,
524 &fsp->num_pending_break_messages);
528 if (EXCLUSIVE_OPLOCK_TYPE(msg.op_type) &&
529 !EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
530 DEBUG(3, ("Already downgraded oplock on %s: %s\n",
531 file_id_string_tos(&fsp->file_id),
533 /* We just send the same message back. */
534 messaging_send_buf(msg_ctx, src, MSG_SMB_BREAK_RESPONSE,
536 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
540 if ((global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
541 !(msg.op_type & FORCE_OPLOCK_BREAK_TO_NONE) &&
542 !koplocks && /* NOTE: we force levelII off for kernel oplocks -
543 * this will change when it is supported */
544 lp_level2_oplocks(SNUM(fsp->conn))) {
545 break_to_level2 = True;
548 break_msg = new_break_smb_message(NULL, fsp, break_to_level2 ?
549 OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
550 if (break_msg == NULL) {
551 exit_server("Could not talloc break_msg\n");
554 /* Need to wait before sending a break message if we sent ourselves this message. */
555 if (procid_to_pid(&src) == sys_getpid()) {
556 wait_before_sending_break();
559 /* Save the server smb signing state. */
560 sign_state = srv_oplock_set_signing(False);
563 if (!send_smb(smbd_server_fd(), break_msg)) {
564 exit_server_cleanly("oplock_break: send_smb failed.");
567 /* Restore the sign state to what it was. */
568 srv_oplock_set_signing(sign_state);
570 TALLOC_FREE(break_msg);
572 fsp->sent_oplock_break = break_to_level2 ? LEVEL_II_BREAK_SENT:BREAK_TO_NONE_SENT;
575 ADD_TO_ARRAY(NULL, struct share_mode_entry, msg,
576 &fsp->pending_break_messages,
577 &fsp->num_pending_break_messages);
579 add_oplock_timeout_handler(fsp);
582 /*******************************************************************
583 This handles the kernel oplock break message.
584 *******************************************************************/
586 static void process_kernel_oplock_break(struct messaging_context *msg_ctx,
589 struct server_id src,
593 unsigned long file_id;
598 if (data->data == NULL) {
599 DEBUG(0, ("Got NULL buffer\n"));
603 if (data->length != MSG_SMB_KERNEL_BREAK_SIZE) {
604 DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
608 /* Pull the data from the message. */
609 pull_file_id_16((char *)data->data, &id);
610 file_id = (unsigned long)IVAL(data->data, 16);
612 DEBUG(10, ("Got kernel oplock break message from pid %d: %s/%u\n",
613 (int)procid_to_pid(&src), file_id_string_tos(&id),
614 (unsigned int)file_id));
616 fsp = initial_break_processing(id, 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_cleanly("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)
658 for (i=0; i<fsp->num_pending_break_messages; i++) {
659 struct share_mode_entry *e = &fsp->pending_break_messages[i];
660 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
662 share_mode_entry_to_message(msg, e);
664 messaging_send_buf(smbd_messaging_context(), e->pid,
665 MSG_SMB_BREAK_RESPONSE,
667 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
670 SAFE_FREE(fsp->pending_break_messages);
671 fsp->num_pending_break_messages = 0;
672 if (fsp->oplock_timeout != NULL) {
673 /* Remove the timed event handler. */
674 TALLOC_FREE(fsp->oplock_timeout);
675 fsp->oplock_timeout = NULL;
680 static void process_oplock_break_response(struct messaging_context *msg_ctx,
683 struct server_id src,
686 struct share_mode_entry msg;
688 if (data->data == NULL) {
689 DEBUG(0, ("Got NULL buffer\n"));
693 if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
694 DEBUG(0, ("Got invalid msg len %u\n",
695 (unsigned int)data->length));
699 /* De-linearize incoming message. */
700 message_to_share_mode_entry(&msg, (char *)data->data);
702 DEBUG(10, ("Got oplock break response from pid %d: %s/%lu mid %u\n",
703 (int)procid_to_pid(&src), file_id_string_tos(&msg.id), msg.share_file_id,
704 (unsigned int)msg.op_mid));
706 /* Here's the hack from open.c, store the mid in the 'port' field */
707 schedule_deferred_open_smb_message(msg.op_mid);
710 static void process_open_retry_message(struct messaging_context *msg_ctx,
713 struct server_id src,
716 struct share_mode_entry msg;
718 if (data->data == NULL) {
719 DEBUG(0, ("Got NULL buffer\n"));
723 if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
724 DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
728 /* De-linearize incoming message. */
729 message_to_share_mode_entry(&msg, (char *)data->data);
731 DEBUG(10, ("Got open retry msg from pid %d: %s mid %u\n",
732 (int)procid_to_pid(&src), file_id_string_tos(&msg.id),
733 (unsigned int)msg.op_mid));
735 schedule_deferred_open_smb_message(msg.op_mid);
738 /****************************************************************************
739 This function is called on any file modification or lock request. If a file
740 is level 2 oplocked then it must tell all other level 2 holders to break to
742 ****************************************************************************/
744 void release_level_2_oplocks_on_change(files_struct *fsp)
747 struct share_mode_lock *lck;
750 * If this file is level II oplocked then we need
751 * to grab the shared memory lock and inform all
752 * other files with a level II lock that they need
753 * to flush their read caches. We keep the lock over
754 * the shared memory area whilst doing this.
757 if (!LEVEL_II_OPLOCK_TYPE(fsp->oplock_type))
760 lck = get_share_mode_lock(NULL, fsp->file_id, NULL, NULL);
762 DEBUG(0,("release_level_2_oplocks_on_change: failed to lock "
763 "share mode entry for file %s.\n", fsp->fsp_name ));
767 DEBUG(10,("release_level_2_oplocks_on_change: num_share_modes = %d\n",
768 lck->num_share_modes ));
770 for(i = 0; i < lck->num_share_modes; i++) {
771 struct share_mode_entry *share_entry = &lck->share_modes[i];
772 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
774 if (!is_valid_share_mode_entry(share_entry)) {
779 * As there could have been multiple writes waiting at the
780 * lock_share_entry gate we may not be the first to
781 * enter. Hence the state of the op_types in the share mode
782 * entries may be partly NO_OPLOCK and partly LEVEL_II or FAKE_LEVEL_II
783 * oplock. It will do no harm to re-send break messages to
784 * those smbd's that are still waiting their turn to remove
785 * their LEVEL_II state, and also no harm to ignore existing
786 * NO_OPLOCK states. JRA.
789 DEBUG(10,("release_level_2_oplocks_on_change: "
790 "share_entry[%i]->op_type == %d\n",
791 i, share_entry->op_type ));
793 if (share_entry->op_type == NO_OPLOCK) {
798 if (EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) {
799 DEBUG(0,("release_level_2_oplocks_on_change: PANIC. "
800 "share mode entry %d is an exlusive "
806 share_mode_entry_to_message(msg, share_entry);
808 messaging_send_buf(smbd_messaging_context(), share_entry->pid,
809 MSG_SMB_ASYNC_LEVEL2_BREAK,
811 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
814 /* We let the message receivers handle removing the oplock state
815 in the share mode lock db. */
820 /****************************************************************************
821 Linearize a share mode entry struct to an internal oplock break message.
822 ****************************************************************************/
824 void share_mode_entry_to_message(char *msg, struct share_mode_entry *e)
826 SIVAL(msg,0,(uint32)e->pid.pid);
827 SSVAL(msg,4,e->op_mid);
828 SSVAL(msg,6,e->op_type);
829 SIVAL(msg,8,e->access_mask);
830 SIVAL(msg,12,e->share_access);
831 SIVAL(msg,16,e->private_options);
832 SIVAL(msg,20,(uint32)e->time.tv_sec);
833 SIVAL(msg,24,(uint32)e->time.tv_usec);
834 push_file_id_16(msg+28, &e->id);
835 SIVAL(msg,44,e->share_file_id);
836 SIVAL(msg,48,e->uid);
837 SSVAL(msg,52,e->flags);
838 #ifdef CLUSTER_SUPPORT
839 SIVAL(msg,54,e->pid.vnn);
843 /****************************************************************************
844 De-linearize an internal oplock break message to a share mode entry struct.
845 ****************************************************************************/
847 void message_to_share_mode_entry(struct share_mode_entry *e, char *msg)
849 e->pid.pid = (pid_t)IVAL(msg,0);
850 e->op_mid = SVAL(msg,4);
851 e->op_type = SVAL(msg,6);
852 e->access_mask = IVAL(msg,8);
853 e->share_access = IVAL(msg,12);
854 e->private_options = IVAL(msg,16);
855 e->time.tv_sec = (time_t)IVAL(msg,20);
856 e->time.tv_usec = (int)IVAL(msg,24);
857 pull_file_id_16(msg+28, &e->id);
858 e->share_file_id = (unsigned long)IVAL(msg,44);
859 e->uid = (uint32)IVAL(msg,48);
860 e->flags = (uint16)SVAL(msg,52);
861 #ifdef CLUSTER_SUPPORT
862 e->pid.vnn = IVAL(msg,54);
866 /****************************************************************************
867 Setup oplocks for this process.
868 ****************************************************************************/
870 bool init_oplocks(struct messaging_context *msg_ctx)
872 DEBUG(3,("init_oplocks: initializing messages.\n"));
874 messaging_register(msg_ctx, NULL, MSG_SMB_BREAK_REQUEST,
875 process_oplock_break_message);
876 messaging_register(msg_ctx, NULL, MSG_SMB_ASYNC_LEVEL2_BREAK,
877 process_oplock_async_level2_break_message);
878 messaging_register(msg_ctx, NULL, MSG_SMB_BREAK_RESPONSE,
879 process_oplock_break_response);
880 messaging_register(msg_ctx, NULL, MSG_SMB_KERNEL_BREAK,
881 process_kernel_oplock_break);
882 messaging_register(msg_ctx, NULL, MSG_SMB_OPEN_RETRY,
883 process_open_retry_message);
885 if (lp_kernel_oplocks()) {
886 #if HAVE_KERNEL_OPLOCKS_IRIX
887 koplocks = irix_init_kernel_oplocks();
888 #elif HAVE_KERNEL_OPLOCKS_LINUX
889 koplocks = linux_init_kernel_oplocks();