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
24 #include "smbd/globals.h"
26 /****************************************************************************
27 Get the number of current exclusive oplocks.
28 ****************************************************************************/
30 int32 get_number_of_exclusive_open_oplocks(void)
32 return exclusive_oplocks_open;
36 * helper function used by the kernel oplock backends to post the break message
38 void break_kernel_oplock(struct messaging_context *msg_ctx, files_struct *fsp)
40 uint8_t msg[MSG_SMB_KERNEL_BREAK_SIZE];
42 /* Put the kernel break info into the message. */
43 push_file_id_24((char *)msg, &fsp->file_id);
44 SIVAL(msg,24,fsp->fh->gen_id);
46 /* Don't need to be root here as we're only ever
47 sending to ourselves. */
49 messaging_send_buf(msg_ctx, procid_self(),
51 msg, MSG_SMB_KERNEL_BREAK_SIZE);
54 /****************************************************************************
55 Attempt to set an oplock on a file. Always succeeds if kernel oplocks are
56 disabled (just sets flags). Returns True if oplock set.
57 ****************************************************************************/
59 bool set_file_oplock(files_struct *fsp, int oplock_type)
61 if ((fsp->oplock_type != NO_OPLOCK) &&
62 (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK) &&
64 !koplocks->ops->set_oplock(koplocks, fsp, oplock_type)) {
68 fsp->oplock_type = oplock_type;
69 fsp->sent_oplock_break = NO_BREAK_SENT;
70 if (oplock_type == LEVEL_II_OPLOCK) {
71 level_II_oplocks_open++;
72 } else if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
73 exclusive_oplocks_open++;
76 DEBUG(5,("set_file_oplock: granted oplock on file %s, %s/%lu, "
77 "tv_sec = %x, tv_usec = %x\n",
78 fsp->fsp_name, file_id_string_tos(&fsp->file_id),
79 fsp->fh->gen_id, (int)fsp->open_time.tv_sec,
80 (int)fsp->open_time.tv_usec ));
85 /****************************************************************************
86 Attempt to release an oplock on a file. Decrements oplock count.
87 ****************************************************************************/
89 void release_file_oplock(files_struct *fsp)
91 if ((fsp->oplock_type != NO_OPLOCK) &&
92 (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK) &&
94 koplocks->ops->release_oplock(koplocks, fsp, NO_OPLOCK);
97 if (fsp->oplock_type == LEVEL_II_OPLOCK) {
98 level_II_oplocks_open--;
99 } else if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
100 exclusive_oplocks_open--;
103 SMB_ASSERT(exclusive_oplocks_open>=0);
104 SMB_ASSERT(level_II_oplocks_open>=0);
106 if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
107 /* This doesn't matter for close. */
108 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
110 fsp->oplock_type = NO_OPLOCK;
112 fsp->sent_oplock_break = NO_BREAK_SENT;
114 flush_write_cache(fsp, OPLOCK_RELEASE_FLUSH);
116 TALLOC_FREE(fsp->oplock_timeout);
119 /****************************************************************************
120 Attempt to downgrade an oplock on a file. Doesn't decrement oplock count.
121 ****************************************************************************/
123 static void downgrade_file_oplock(files_struct *fsp)
125 if (!EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
126 DEBUG(0, ("trying to downgrade an already-downgraded oplock!\n"));
131 koplocks->ops->release_oplock(koplocks, fsp, LEVEL_II_OPLOCK);
133 fsp->oplock_type = LEVEL_II_OPLOCK;
134 exclusive_oplocks_open--;
135 level_II_oplocks_open++;
136 fsp->sent_oplock_break = NO_BREAK_SENT;
139 /****************************************************************************
140 Remove a file oplock. Copes with level II and exclusive.
141 Locks then unlocks the share mode lock. Client can decide to go directly
142 to none even if a "break-to-level II" was sent.
143 ****************************************************************************/
145 bool remove_oplock(files_struct *fsp)
148 struct share_mode_lock *lck;
150 /* Remove the oplock flag from the sharemode. */
151 lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
154 DEBUG(0,("remove_oplock: failed to lock share entry for "
155 "file %s\n", fsp->fsp_name ));
158 ret = remove_share_oplock(lck, fsp);
160 DEBUG(0,("remove_oplock: failed to remove share oplock for "
161 "file %s fnum %d, %s\n",
162 fsp->fsp_name, fsp->fnum, file_id_string_tos(&fsp->file_id)));
164 release_file_oplock(fsp);
170 * Deal with a reply when a break-to-level II was sent.
172 bool downgrade_oplock(files_struct *fsp)
175 struct share_mode_lock *lck;
177 lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
180 DEBUG(0,("downgrade_oplock: failed to lock share entry for "
181 "file %s\n", fsp->fsp_name ));
184 ret = downgrade_share_oplock(lck, fsp);
186 DEBUG(0,("downgrade_oplock: failed to downgrade share oplock "
187 "for file %s fnum %d, file_id %s\n",
188 fsp->fsp_name, fsp->fnum, file_id_string_tos(&fsp->file_id)));
191 downgrade_file_oplock(fsp);
197 * Some kernel oplock implementations handle the notification themselves.
199 bool should_notify_deferred_opens()
202 (koplocks->flags & KOPLOCKS_DEFERRED_OPEN_NOTIFICATION));
205 /****************************************************************************
206 Set up an oplock break message.
207 ****************************************************************************/
209 static char *new_break_smb_message(TALLOC_CTX *mem_ctx,
210 files_struct *fsp, uint8 cmd)
212 char *result = TALLOC_ARRAY(mem_ctx, char, smb_size + 8*2 + 0);
214 if (result == NULL) {
215 DEBUG(0, ("talloc failed\n"));
219 memset(result,'\0',smb_size);
220 srv_set_message(result,8,0,true);
221 SCVAL(result,smb_com,SMBlockingX);
222 SSVAL(result,smb_tid,fsp->conn->cnum);
223 SSVAL(result,smb_pid,0xFFFF);
224 SSVAL(result,smb_uid,0);
225 SSVAL(result,smb_mid,0xFFFF);
226 SCVAL(result,smb_vwv0,0xFF);
227 SSVAL(result,smb_vwv2,fsp->fnum);
228 SCVAL(result,smb_vwv3,LOCKING_ANDX_OPLOCK_RELEASE);
229 SCVAL(result,smb_vwv3+1,cmd);
233 /****************************************************************************
234 Function to do the waiting before sending a local break.
235 ****************************************************************************/
237 static void wait_before_sending_break(void)
239 long wait_time = (long)lp_oplock_break_wait_time();
242 smb_msleep(wait_time);
246 /****************************************************************************
247 Ensure that we have a valid oplock.
248 ****************************************************************************/
250 static files_struct *initial_break_processing(struct file_id id, unsigned long file_id)
252 files_struct *fsp = NULL;
254 if( DEBUGLVL( 3 ) ) {
255 dbgtext( "initial_break_processing: called for %s/%u\n",
256 file_id_string_tos(&id), (int)file_id);
257 dbgtext( "Current oplocks_open (exclusive = %d, levelII = %d)\n",
258 exclusive_oplocks_open, level_II_oplocks_open );
262 * We need to search the file open table for the
263 * entry containing this dev and inode, and ensure
264 * we have an oplock on it.
267 fsp = file_find_dif(id, file_id);
270 /* The file could have been closed in the meantime - return success. */
271 if( DEBUGLVL( 3 ) ) {
272 dbgtext( "initial_break_processing: cannot find open file with " );
273 dbgtext( "file_id %s gen_id = %lu", file_id_string_tos(&id), file_id);
274 dbgtext( "allowing break to succeed.\n" );
279 /* Ensure we have an oplock on the file */
282 * There is a potential race condition in that an oplock could
283 * have been broken due to another udp request, and yet there are
284 * still oplock break messages being sent in the udp message
285 * queue for this file. So return true if we don't have an oplock,
286 * as we may have just freed it.
289 if(fsp->oplock_type == NO_OPLOCK) {
290 if( DEBUGLVL( 3 ) ) {
291 dbgtext( "initial_break_processing: file %s ", fsp->fsp_name );
292 dbgtext( "(file_id = %s gen_id = %lu) has no oplock.\n",
293 file_id_string_tos(&id), fsp->fh->gen_id );
294 dbgtext( "Allowing break to succeed regardless.\n" );
302 static void oplock_timeout_handler(struct event_context *ctx,
303 struct timed_event *te,
307 files_struct *fsp = (files_struct *)private_data;
309 /* Remove the timed event handler. */
310 TALLOC_FREE(fsp->oplock_timeout);
311 DEBUG(0, ("Oplock break failed for file %s -- replying anyway\n", fsp->fsp_name));
312 global_client_failed_oplock_break = True;
314 reply_to_oplock_break_requests(fsp);
317 /*******************************************************************
318 Add a timeout handler waiting for the client reply.
319 *******************************************************************/
321 static void add_oplock_timeout_handler(files_struct *fsp)
324 * If kernel oplocks already notifies smbds when an oplock break times
328 (koplocks->flags & KOPLOCKS_TIMEOUT_NOTIFICATION)) {
332 if (fsp->oplock_timeout != NULL) {
333 DEBUG(0, ("Logic problem -- have an oplock event hanging "
337 fsp->oplock_timeout =
338 event_add_timed(smbd_event_context(), NULL,
339 timeval_current_ofs(OPLOCK_BREAK_TIMEOUT, 0),
340 oplock_timeout_handler, fsp);
342 if (fsp->oplock_timeout == NULL) {
343 DEBUG(0, ("Could not add oplock timeout handler\n"));
347 void break_level2_to_none_async(files_struct *fsp)
351 if (fsp->oplock_type == NO_OPLOCK) {
352 /* We already got a "break to none" message and we've handled
353 * it. just ignore. */
354 DEBUG(3, ("process_oplock_async_level2_break_message: already "
355 "broken to none, ignoring.\n"));
359 if (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
360 /* Don't tell the client, just downgrade. */
361 DEBUG(3, ("process_oplock_async_level2_break_message: "
362 "downgrading fake level 2 oplock.\n"));
367 /* Ensure we're really at level2 state. */
368 SMB_ASSERT(fsp->oplock_type == LEVEL_II_OPLOCK);
370 DEBUG(10,("process_oplock_async_level2_break_message: sending break "
371 "to none message for fid %d, file %s\n", fsp->fnum,
374 /* Now send a break to none message to our client. */
375 break_msg = new_break_smb_message(NULL, fsp, OPLOCKLEVEL_NONE);
376 if (break_msg == NULL) {
377 exit_server("Could not talloc break_msg\n");
381 if (!srv_send_smb(smbd_server_fd(),
383 IS_CONN_ENCRYPTED(fsp->conn),
385 exit_server_cleanly("oplock_break: srv_send_smb failed.");
388 TALLOC_FREE(break_msg);
390 /* Async level2 request, don't send a reply, just remove the oplock. */
395 /*******************************************************************
396 This handles the case of a write triggering a break to none
397 message on a level2 oplock.
398 When we get this message we may be in any of three states :
399 NO_OPLOCK, LEVEL_II, FAKE_LEVEL2. We only send a message to
400 the client for LEVEL2.
401 *******************************************************************/
403 void process_oplock_async_level2_break_message(struct messaging_context *msg_ctx,
406 struct server_id src,
409 struct share_mode_entry msg;
412 if (data->data == NULL) {
413 DEBUG(0, ("Got NULL buffer\n"));
417 if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
418 DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
422 /* De-linearize incoming message. */
423 message_to_share_mode_entry(&msg, (char *)data->data);
425 DEBUG(10, ("Got oplock async level 2 break message from pid %s: "
426 "%s/%lu\n", procid_str(debug_ctx(), &src),
427 file_id_string_tos(&msg.id), msg.share_file_id));
429 fsp = initial_break_processing(msg.id, msg.share_file_id);
432 /* We hit a race here. Break messages are sent, and before we
433 * get to process this message, we have closed the file.
434 * No need to reply as this is an async message. */
435 DEBUG(3, ("process_oplock_async_level2_break_message: Did not find fsp, ignoring\n"));
439 break_level2_to_none_async(fsp);
442 /*******************************************************************
443 This handles the generic oplock break message from another smbd.
444 *******************************************************************/
446 static void process_oplock_break_message(struct messaging_context *msg_ctx,
449 struct server_id src,
452 struct share_mode_entry msg;
455 bool break_to_level2 = False;
457 if (data->data == NULL) {
458 DEBUG(0, ("Got NULL buffer\n"));
462 if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
463 DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
467 /* De-linearize incoming message. */
468 message_to_share_mode_entry(&msg, (char *)data->data);
470 DEBUG(10, ("Got oplock break message from pid %s: %s/%lu\n",
471 procid_str(debug_ctx(), &src), file_id_string_tos(&msg.id),
474 fsp = initial_break_processing(msg.id, msg.share_file_id);
477 /* a We hit race here. Break messages are sent, and before we
478 * get to process this message, we have closed the file. Reply
479 * with 'ok, oplock broken' */
480 DEBUG(3, ("Did not find fsp\n"));
482 /* We just send the same message back. */
483 messaging_send_buf(msg_ctx, src, MSG_SMB_BREAK_RESPONSE,
485 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
489 if (fsp->sent_oplock_break != NO_BREAK_SENT) {
490 /* Remember we have to inform the requesting PID when the
493 ADD_TO_ARRAY(NULL, struct share_mode_entry, msg,
494 &fsp->pending_break_messages,
495 &fsp->num_pending_break_messages);
499 if (EXCLUSIVE_OPLOCK_TYPE(msg.op_type) &&
500 !EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
501 DEBUG(3, ("Already downgraded oplock on %s: %s\n",
502 file_id_string_tos(&fsp->file_id),
504 /* We just send the same message back. */
505 messaging_send_buf(msg_ctx, src, MSG_SMB_BREAK_RESPONSE,
507 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
511 if ((global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
512 !(msg.op_type & FORCE_OPLOCK_BREAK_TO_NONE) &&
513 !(koplocks && !(koplocks->flags & KOPLOCKS_LEVEL2_SUPPORTED)) &&
514 lp_level2_oplocks(SNUM(fsp->conn))) {
515 break_to_level2 = True;
518 break_msg = new_break_smb_message(NULL, fsp, break_to_level2 ?
519 OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
520 if (break_msg == NULL) {
521 exit_server("Could not talloc break_msg\n");
524 /* Need to wait before sending a break message if we sent ourselves this message. */
525 if (procid_is_me(&src)) {
526 wait_before_sending_break();
530 if (!srv_send_smb(smbd_server_fd(),
532 IS_CONN_ENCRYPTED(fsp->conn),
534 exit_server_cleanly("oplock_break: srv_send_smb failed.");
537 TALLOC_FREE(break_msg);
539 fsp->sent_oplock_break = break_to_level2 ? LEVEL_II_BREAK_SENT:BREAK_TO_NONE_SENT;
542 ADD_TO_ARRAY(NULL, struct share_mode_entry, msg,
543 &fsp->pending_break_messages,
544 &fsp->num_pending_break_messages);
546 add_oplock_timeout_handler(fsp);
549 /*******************************************************************
550 This handles the kernel oplock break message.
551 *******************************************************************/
553 static void process_kernel_oplock_break(struct messaging_context *msg_ctx,
556 struct server_id src,
560 unsigned long file_id;
564 if (data->data == NULL) {
565 DEBUG(0, ("Got NULL buffer\n"));
569 if (data->length != MSG_SMB_KERNEL_BREAK_SIZE) {
570 DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
574 /* Pull the data from the message. */
575 pull_file_id_24((char *)data->data, &id);
576 file_id = (unsigned long)IVAL(data->data, 24);
578 DEBUG(10, ("Got kernel oplock break message from pid %s: %s/%u\n",
579 procid_str(debug_ctx(), &src), file_id_string_tos(&id),
580 (unsigned int)file_id));
582 fsp = initial_break_processing(id, file_id);
585 DEBUG(3, ("Got a kernel oplock break message for a file "
586 "I don't know about\n"));
590 if (fsp->sent_oplock_break != NO_BREAK_SENT) {
591 /* This is ok, kernel oplocks come in completely async */
592 DEBUG(3, ("Got a kernel oplock request while waiting for a "
597 break_msg = new_break_smb_message(NULL, fsp, OPLOCKLEVEL_NONE);
598 if (break_msg == NULL) {
599 exit_server("Could not talloc break_msg\n");
603 if (!srv_send_smb(smbd_server_fd(),
605 IS_CONN_ENCRYPTED(fsp->conn),
607 exit_server_cleanly("oplock_break: srv_send_smb failed.");
610 TALLOC_FREE(break_msg);
612 fsp->sent_oplock_break = BREAK_TO_NONE_SENT;
614 add_oplock_timeout_handler(fsp);
617 void reply_to_oplock_break_requests(files_struct *fsp)
622 * If kernel oplocks already notifies smbds when oplocks are
623 * broken/removed, just return.
626 (koplocks->flags & KOPLOCKS_OPLOCK_BROKEN_NOTIFICATION)) {
630 for (i=0; i<fsp->num_pending_break_messages; i++) {
631 struct share_mode_entry *e = &fsp->pending_break_messages[i];
632 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
634 share_mode_entry_to_message(msg, e);
636 messaging_send_buf(smbd_messaging_context(), e->pid,
637 MSG_SMB_BREAK_RESPONSE,
639 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
642 SAFE_FREE(fsp->pending_break_messages);
643 fsp->num_pending_break_messages = 0;
644 if (fsp->oplock_timeout != NULL) {
645 /* Remove the timed event handler. */
646 TALLOC_FREE(fsp->oplock_timeout);
647 fsp->oplock_timeout = NULL;
652 static void process_oplock_break_response(struct messaging_context *msg_ctx,
655 struct server_id src,
658 struct share_mode_entry msg;
660 if (data->data == NULL) {
661 DEBUG(0, ("Got NULL buffer\n"));
665 if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
666 DEBUG(0, ("Got invalid msg len %u\n",
667 (unsigned int)data->length));
671 /* De-linearize incoming message. */
672 message_to_share_mode_entry(&msg, (char *)data->data);
674 DEBUG(10, ("Got oplock break response from pid %s: %s/%lu mid %u\n",
675 procid_str(debug_ctx(), &src), file_id_string_tos(&msg.id),
676 msg.share_file_id, (unsigned int)msg.op_mid));
678 /* Here's the hack from open.c, store the mid in the 'port' field */
679 schedule_deferred_open_smb_message(msg.op_mid);
682 static void process_open_retry_message(struct messaging_context *msg_ctx,
685 struct server_id src,
688 struct share_mode_entry msg;
690 if (data->data == NULL) {
691 DEBUG(0, ("Got NULL buffer\n"));
695 if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
696 DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
700 /* De-linearize incoming message. */
701 message_to_share_mode_entry(&msg, (char *)data->data);
703 DEBUG(10, ("Got open retry msg from pid %s: %s mid %u\n",
704 procid_str(debug_ctx(), &src), file_id_string_tos(&msg.id),
705 (unsigned int)msg.op_mid));
707 schedule_deferred_open_smb_message(msg.op_mid);
710 /****************************************************************************
711 This function is called on any file modification or lock request. If a file
712 is level 2 oplocked then it must tell all other level 2 holders to break to
714 ****************************************************************************/
716 static void contend_level2_oplocks_begin_default(files_struct *fsp,
717 enum level2_contention_type type)
720 struct share_mode_lock *lck;
723 * If this file is level II oplocked then we need
724 * to grab the shared memory lock and inform all
725 * other files with a level II lock that they need
726 * to flush their read caches. We keep the lock over
727 * the shared memory area whilst doing this.
730 if (!LEVEL_II_OPLOCK_TYPE(fsp->oplock_type))
733 lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
736 DEBUG(0,("release_level_2_oplocks_on_change: failed to lock "
737 "share mode entry for file %s.\n", fsp->fsp_name ));
741 DEBUG(10,("release_level_2_oplocks_on_change: num_share_modes = %d\n",
742 lck->num_share_modes ));
744 for(i = 0; i < lck->num_share_modes; i++) {
745 struct share_mode_entry *share_entry = &lck->share_modes[i];
746 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
748 if (!is_valid_share_mode_entry(share_entry)) {
753 * As there could have been multiple writes waiting at the
754 * lock_share_entry gate we may not be the first to
755 * enter. Hence the state of the op_types in the share mode
756 * entries may be partly NO_OPLOCK and partly LEVEL_II or FAKE_LEVEL_II
757 * oplock. It will do no harm to re-send break messages to
758 * those smbd's that are still waiting their turn to remove
759 * their LEVEL_II state, and also no harm to ignore existing
760 * NO_OPLOCK states. JRA.
763 DEBUG(10,("release_level_2_oplocks_on_change: "
764 "share_entry[%i]->op_type == %d\n",
765 i, share_entry->op_type ));
767 if (share_entry->op_type == NO_OPLOCK) {
772 if (EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) {
773 DEBUG(0,("release_level_2_oplocks_on_change: PANIC. "
774 "share mode entry %d is an exlusive "
780 share_mode_entry_to_message(msg, share_entry);
783 * Deal with a race condition when breaking level2
784 * oplocks. Don't send all the messages and release
785 * the lock, this allows someone else to come in and
786 * get a level2 lock before any of the messages are
787 * processed, and thus miss getting a break message.
788 * Ensure at least one entry (the one we're breaking)
789 * is processed immediately under the lock and becomes
790 * set as NO_OPLOCK to stop any waiter getting a level2.
794 if (procid_is_me(&share_entry->pid)) {
795 wait_before_sending_break();
796 break_level2_to_none_async(fsp);
798 messaging_send_buf(smbd_messaging_context(),
800 MSG_SMB_ASYNC_LEVEL2_BREAK,
802 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
806 /* We let the message receivers handle removing the oplock state
807 in the share mode lock db. */
812 void contend_level2_oplocks_begin(files_struct *fsp,
813 enum level2_contention_type type)
815 if (koplocks && koplocks->ops->contend_level2_oplocks_begin) {
816 koplocks->ops->contend_level2_oplocks_begin(fsp, type);
820 contend_level2_oplocks_begin_default(fsp, type);
823 void contend_level2_oplocks_end(files_struct *fsp,
824 enum level2_contention_type type)
826 /* Only kernel oplocks implement this so far */
827 if (koplocks && koplocks->ops->contend_level2_oplocks_end) {
828 koplocks->ops->contend_level2_oplocks_end(fsp, type);
832 /****************************************************************************
833 Linearize a share mode entry struct to an internal oplock break message.
834 ****************************************************************************/
836 void share_mode_entry_to_message(char *msg, const struct share_mode_entry *e)
838 SIVAL(msg,0,(uint32)e->pid.pid);
839 SSVAL(msg,4,e->op_mid);
840 SSVAL(msg,6,e->op_type);
841 SIVAL(msg,8,e->access_mask);
842 SIVAL(msg,12,e->share_access);
843 SIVAL(msg,16,e->private_options);
844 SIVAL(msg,20,(uint32)e->time.tv_sec);
845 SIVAL(msg,24,(uint32)e->time.tv_usec);
846 push_file_id_24(msg+28, &e->id);
847 SIVAL(msg,52,e->share_file_id);
848 SIVAL(msg,56,e->uid);
849 SSVAL(msg,60,e->flags);
850 #ifdef CLUSTER_SUPPORT
851 SIVAL(msg,62,e->pid.vnn);
855 /****************************************************************************
856 De-linearize an internal oplock break message to a share mode entry struct.
857 ****************************************************************************/
859 void message_to_share_mode_entry(struct share_mode_entry *e, char *msg)
861 e->pid.pid = (pid_t)IVAL(msg,0);
862 e->op_mid = SVAL(msg,4);
863 e->op_type = SVAL(msg,6);
864 e->access_mask = IVAL(msg,8);
865 e->share_access = IVAL(msg,12);
866 e->private_options = IVAL(msg,16);
867 e->time.tv_sec = (time_t)IVAL(msg,20);
868 e->time.tv_usec = (int)IVAL(msg,24);
869 pull_file_id_24(msg+28, &e->id);
870 e->share_file_id = (unsigned long)IVAL(msg,52);
871 e->uid = (uint32)IVAL(msg,56);
872 e->flags = (uint16)SVAL(msg,60);
873 #ifdef CLUSTER_SUPPORT
874 e->pid.vnn = IVAL(msg,62);
878 /****************************************************************************
879 Setup oplocks for this process.
880 ****************************************************************************/
882 bool init_oplocks(struct messaging_context *msg_ctx)
884 DEBUG(3,("init_oplocks: initializing messages.\n"));
886 messaging_register(msg_ctx, NULL, MSG_SMB_BREAK_REQUEST,
887 process_oplock_break_message);
888 messaging_register(msg_ctx, NULL, MSG_SMB_ASYNC_LEVEL2_BREAK,
889 process_oplock_async_level2_break_message);
890 messaging_register(msg_ctx, NULL, MSG_SMB_BREAK_RESPONSE,
891 process_oplock_break_response);
892 messaging_register(msg_ctx, NULL, MSG_SMB_KERNEL_BREAK,
893 process_kernel_oplock_break);
894 messaging_register(msg_ctx, NULL, MSG_SMB_OPEN_RETRY,
895 process_open_retry_message);
897 if (lp_kernel_oplocks()) {
898 #if HAVE_KERNEL_OPLOCKS_IRIX
899 koplocks = irix_init_kernel_oplocks(talloc_autofree_context());
900 #elif HAVE_KERNEL_OPLOCKS_LINUX
901 koplocks = linux_init_kernel_oplocks(talloc_autofree_context());
903 koplocks = onefs_init_kernel_oplocks(talloc_autofree_context());