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/smbd.h"
25 #include "smbd/globals.h"
27 #include "../librpc/gen_ndr/open_files.h"
30 * helper function used by the kernel oplock backends to post the break message
32 void break_kernel_oplock(struct messaging_context *msg_ctx, files_struct *fsp)
34 uint8_t msg[MSG_SMB_KERNEL_BREAK_SIZE];
36 /* Put the kernel break info into the message. */
37 push_file_id_24((char *)msg, &fsp->file_id);
38 SIVAL(msg,24,fsp->fh->gen_id);
40 /* Don't need to be root here as we're only ever
41 sending to ourselves. */
43 messaging_send_buf(msg_ctx, messaging_server_id(msg_ctx),
45 msg, MSG_SMB_KERNEL_BREAK_SIZE);
48 /****************************************************************************
49 Attempt to set an oplock on a file. Succeeds if kernel oplocks are
50 disabled (just sets flags).
51 ****************************************************************************/
53 NTSTATUS set_file_oplock(files_struct *fsp, int oplock_type)
55 struct smbd_server_connection *sconn = fsp->conn->sconn;
56 struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
57 bool use_kernel = lp_kernel_oplocks(SNUM(fsp->conn)) && koplocks;
59 if (fsp->oplock_type == LEVEL_II_OPLOCK) {
61 !(koplocks->flags & KOPLOCKS_LEVEL2_SUPPORTED)) {
62 DEBUG(10, ("Refusing level2 oplock, kernel oplocks "
63 "don't support them\n"));
64 return NT_STATUS_NOT_SUPPORTED;
68 if ((fsp->oplock_type != NO_OPLOCK) &&
70 !koplocks->ops->set_oplock(koplocks, fsp, oplock_type))
72 return map_nt_error_from_unix(errno);
75 fsp->oplock_type = oplock_type;
76 fsp->sent_oplock_break = NO_BREAK_SENT;
77 if (oplock_type == LEVEL_II_OPLOCK) {
78 sconn->oplocks.level_II_open++;
79 } else if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
80 sconn->oplocks.exclusive_open++;
83 DEBUG(5,("set_file_oplock: granted oplock on file %s, %s/%lu, "
84 "tv_sec = %x, tv_usec = %x\n",
85 fsp_str_dbg(fsp), file_id_string_tos(&fsp->file_id),
86 fsp->fh->gen_id, (int)fsp->open_time.tv_sec,
87 (int)fsp->open_time.tv_usec ));
92 /****************************************************************************
93 Attempt to release an oplock on a file. Decrements oplock count.
94 ****************************************************************************/
96 void release_file_oplock(files_struct *fsp)
98 struct smbd_server_connection *sconn = fsp->conn->sconn;
99 struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
101 if ((fsp->oplock_type != NO_OPLOCK) &&
103 koplocks->ops->release_oplock(koplocks, fsp, NO_OPLOCK);
106 if (fsp->oplock_type == LEVEL_II_OPLOCK) {
107 sconn->oplocks.level_II_open--;
108 } else if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
109 sconn->oplocks.exclusive_open--;
112 SMB_ASSERT(sconn->oplocks.exclusive_open>=0);
113 SMB_ASSERT(sconn->oplocks.level_II_open>=0);
115 fsp->oplock_type = NO_OPLOCK;
116 fsp->sent_oplock_break = NO_BREAK_SENT;
118 flush_write_cache(fsp, OPLOCK_RELEASE_FLUSH);
119 delete_write_cache(fsp);
121 TALLOC_FREE(fsp->oplock_timeout);
124 /****************************************************************************
125 Attempt to downgrade an oplock on a file. Doesn't decrement oplock count.
126 ****************************************************************************/
128 static void downgrade_file_oplock(files_struct *fsp)
130 struct smbd_server_connection *sconn = fsp->conn->sconn;
131 struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
133 if (!EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
134 DEBUG(0, ("trying to downgrade an already-downgraded oplock!\n"));
139 koplocks->ops->release_oplock(koplocks, fsp, LEVEL_II_OPLOCK);
141 fsp->oplock_type = LEVEL_II_OPLOCK;
142 sconn->oplocks.exclusive_open--;
143 sconn->oplocks.level_II_open++;
144 fsp->sent_oplock_break = NO_BREAK_SENT;
146 TALLOC_FREE(fsp->oplock_timeout);
149 /****************************************************************************
150 Remove a file oplock. Copes with level II and exclusive.
151 Locks then unlocks the share mode lock. Client can decide to go directly
152 to none even if a "break-to-level II" was sent.
153 ****************************************************************************/
155 bool remove_oplock(files_struct *fsp)
158 struct share_mode_lock *lck;
160 /* Remove the oplock flag from the sharemode. */
161 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
163 DEBUG(0,("remove_oplock: failed to lock share entry for "
164 "file %s\n", fsp_str_dbg(fsp)));
168 if (fsp->oplock_type == LEVEL_II_OPLOCK) {
171 * If we're the only LEVEL_II holder, we have to remove the
172 * have_read_oplocks from the brlock entry
175 struct share_mode_data *data = lck->data;
176 uint32_t i, num_level2;
179 for (i=0; i<data->num_share_modes; i++) {
180 if (data->share_modes[i].op_type == LEVEL_II_OPLOCK) {
183 if (num_level2 > 1) {
185 * No need to count them all...
191 if (num_level2 == 1) {
193 * That's only us. We are dropping that level2 oplock,
194 * so remove the brlock flag.
196 struct byte_range_lock *brl;
198 brl = brl_get_locks(talloc_tos(), fsp);
200 brl_set_have_read_oplocks(brl, false);
206 ret = remove_share_oplock(lck, fsp);
208 DEBUG(0,("remove_oplock: failed to remove share oplock for "
210 fsp_str_dbg(fsp), fsp_fnum_dbg(fsp),
211 file_id_string_tos(&fsp->file_id)));
213 release_file_oplock(fsp);
219 * Deal with a reply when a break-to-level II was sent.
221 bool downgrade_oplock(files_struct *fsp)
224 struct share_mode_lock *lck;
225 struct byte_range_lock *brl;
227 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
229 DEBUG(0,("downgrade_oplock: failed to lock share entry for "
230 "file %s\n", fsp_str_dbg(fsp)));
233 ret = downgrade_share_oplock(lck, fsp);
235 DEBUG(0,("downgrade_oplock: failed to downgrade share oplock "
236 "for file %s, %s, file_id %s\n",
237 fsp_str_dbg(fsp), fsp_fnum_dbg(fsp),
238 file_id_string_tos(&fsp->file_id)));
241 downgrade_file_oplock(fsp);
243 brl = brl_get_locks(talloc_tos(), fsp);
245 brl_set_have_read_oplocks(brl, true);
253 /****************************************************************************
254 Set up an oplock break message.
255 ****************************************************************************/
257 #define SMB1_BREAK_MESSAGE_LENGTH (smb_size + 8*2)
259 static void new_break_message_smb1(files_struct *fsp, int cmd,
260 char result[SMB1_BREAK_MESSAGE_LENGTH])
262 memset(result,'\0',smb_size);
263 srv_set_message(result,8,0,true);
264 SCVAL(result,smb_com,SMBlockingX);
265 SSVAL(result,smb_tid,fsp->conn->cnum);
266 SSVAL(result,smb_pid,0xFFFF);
267 SSVAL(result,smb_uid,0);
268 SSVAL(result,smb_mid,0xFFFF);
269 SCVAL(result,smb_vwv0,0xFF);
270 SSVAL(result,smb_vwv2,fsp->fnum);
271 SCVAL(result,smb_vwv3,LOCKING_ANDX_OPLOCK_RELEASE);
272 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(
293 struct smbd_server_connection *sconn, struct file_id id,
294 unsigned long file_id)
296 files_struct *fsp = NULL;
298 DEBUG(3, ("initial_break_processing: called for %s/%u\n"
299 "Current oplocks_open (exclusive = %d, levelII = %d)\n",
300 file_id_string_tos(&id), (int)file_id,
301 sconn->oplocks.exclusive_open,
302 sconn->oplocks.level_II_open));
305 * We need to search the file open table for the
306 * entry containing this dev and inode, and ensure
307 * we have an oplock on it.
310 fsp = file_find_dif(sconn, id, file_id);
313 /* The file could have been closed in the meantime - return success. */
314 DEBUG(3, ("initial_break_processing: cannot find open file "
315 "with file_id %s gen_id = %lu, allowing break to "
316 "succeed.\n", file_id_string_tos(&id), file_id));
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 DEBUG(3, ("initial_break_processing: file %s (file_id = %s "
332 "gen_id = %lu) has no oplock. Allowing break to "
333 "succeed regardless.\n", fsp_str_dbg(fsp),
334 file_id_string_tos(&id), fsp->fh->gen_id));
341 static void oplock_timeout_handler(struct tevent_context *ctx,
342 struct tevent_timer *te,
346 files_struct *fsp = (files_struct *)private_data;
348 SMB_ASSERT(fsp->sent_oplock_break != NO_BREAK_SENT);
350 /* Remove the timed event handler. */
351 TALLOC_FREE(fsp->oplock_timeout);
352 DEBUG(0, ("Oplock break failed for file %s -- replying anyway\n",
357 /*******************************************************************
358 Add a timeout handler waiting for the client reply.
359 *******************************************************************/
361 static void add_oplock_timeout_handler(files_struct *fsp)
363 struct smbd_server_connection *sconn = fsp->conn->sconn;
364 struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
367 * If kernel oplocks already notifies smbds when an oplock break times
371 (koplocks->flags & KOPLOCKS_TIMEOUT_NOTIFICATION)) {
375 if (fsp->oplock_timeout != NULL) {
376 DEBUG(0, ("Logic problem -- have an oplock event hanging "
380 fsp->oplock_timeout =
381 tevent_add_timer(fsp->conn->sconn->ev_ctx, fsp,
382 timeval_current_ofs(OPLOCK_BREAK_TIMEOUT, 0),
383 oplock_timeout_handler, fsp);
385 if (fsp->oplock_timeout == NULL) {
386 DEBUG(0, ("Could not add oplock timeout handler\n"));
390 static void send_break_message_smb1(files_struct *fsp, int level)
392 char break_msg[SMB1_BREAK_MESSAGE_LENGTH];
394 new_break_message_smb1(fsp, level, break_msg);
397 if (!srv_send_smb(fsp->conn->sconn,
399 IS_CONN_ENCRYPTED(fsp->conn),
401 exit_server_cleanly("send_break_message_smb1: "
402 "srv_send_smb failed.");
406 static void break_level2_to_none_async(files_struct *fsp)
408 struct smbd_server_connection *sconn = fsp->conn->sconn;
410 if (fsp->oplock_type == NO_OPLOCK) {
411 /* We already got a "break to none" message and we've handled
412 * it. just ignore. */
413 DEBUG(3, ("process_oplock_async_level2_break_message: already "
414 "broken to none, ignoring.\n"));
418 /* Ensure we're really at level2 state. */
419 SMB_ASSERT(fsp->oplock_type == LEVEL_II_OPLOCK);
421 DEBUG(10,("process_oplock_async_level2_break_message: sending break "
422 "to none message for %s, file %s\n", fsp_fnum_dbg(fsp),
425 /* Now send a break to none message to our client. */
426 if (sconn->using_smb2) {
427 send_break_message_smb2(fsp, OPLOCKLEVEL_NONE);
429 send_break_message_smb1(fsp, OPLOCKLEVEL_NONE);
432 /* Async level2 request, don't send a reply, just remove the oplock. */
436 /*******************************************************************
437 This handles the case of a write triggering a break to none
438 message on a level2 oplock.
439 When we get this message we may be in any of three states :
440 NO_OPLOCK, LEVEL_II, FAKE_LEVEL2. We only send a message to
441 the client for LEVEL2.
442 *******************************************************************/
444 static void process_oplock_async_level2_break_message(struct messaging_context *msg_ctx,
447 struct server_id src,
450 struct share_mode_entry msg;
452 struct smbd_server_connection *sconn =
453 talloc_get_type_abort(private_data,
454 struct smbd_server_connection);
456 if (data->data == NULL) {
457 DEBUG(0, ("Got NULL buffer\n"));
461 if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
462 DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
466 /* De-linearize incoming message. */
467 message_to_share_mode_entry(&msg, (char *)data->data);
469 DEBUG(10, ("Got oplock async level 2 break message from pid %s: "
470 "%s/%llu\n", server_id_str(talloc_tos(), &src),
471 file_id_string_tos(&msg.id),
472 (unsigned long long)msg.share_file_id));
474 fsp = initial_break_processing(sconn, msg.id, msg.share_file_id);
477 /* We hit a race here. Break messages are sent, and before we
478 * get to process this message, we have closed the file.
479 * No need to reply as this is an async message. */
480 DEBUG(3, ("process_oplock_async_level2_break_message: Did not find fsp, ignoring\n"));
484 break_level2_to_none_async(fsp);
487 /*******************************************************************
488 This handles the generic oplock break message from another smbd.
489 *******************************************************************/
491 static void process_oplock_break_message(struct messaging_context *msg_ctx,
494 struct server_id src,
497 struct share_mode_entry msg;
499 bool break_to_level2 = False;
501 struct smbd_server_connection *sconn =
502 talloc_get_type_abort(private_data,
503 struct smbd_server_connection);
504 struct server_id self = messaging_server_id(sconn->msg_ctx);
505 struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
507 if (data->data == NULL) {
508 DEBUG(0, ("Got NULL buffer\n"));
512 if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
513 DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
517 /* De-linearize incoming message. */
518 message_to_share_mode_entry(&msg, (char *)data->data);
520 DEBUG(10, ("Got oplock break message from pid %s: %s/%llu\n",
521 server_id_str(talloc_tos(), &src),
522 file_id_string_tos(&msg.id),
523 (unsigned long long)msg.share_file_id));
525 fsp = initial_break_processing(sconn, msg.id, msg.share_file_id);
528 /* We hit a race here. Break messages are sent, and before we
529 * get to process this message, we have closed the file. */
530 DEBUG(3, ("Did not find fsp\n"));
534 if (fsp->sent_oplock_break != NO_BREAK_SENT) {
536 * Nothing to do anymore
541 if (EXCLUSIVE_OPLOCK_TYPE(msg.op_type) &&
542 !EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
543 DEBUG(3, ("Already downgraded oplock on %s: %s\n",
544 file_id_string_tos(&fsp->file_id),
549 use_kernel = lp_kernel_oplocks(SNUM(fsp->conn)) && koplocks;
551 if ((global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
552 !(use_kernel && !(koplocks->flags & KOPLOCKS_LEVEL2_SUPPORTED)) &&
553 lp_level2_oplocks(SNUM(fsp->conn))) {
554 break_to_level2 = True;
557 /* Need to wait before sending a break
558 message if we sent ourselves this message. */
559 if (serverid_equal(&self, &src)) {
560 wait_before_sending_break();
563 if (sconn->using_smb2) {
564 send_break_message_smb2(fsp, break_to_level2 ?
565 OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
567 send_break_message_smb1(fsp, break_to_level2 ?
568 OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
571 fsp->sent_oplock_break = break_to_level2 ? LEVEL_II_BREAK_SENT:BREAK_TO_NONE_SENT;
573 add_oplock_timeout_handler(fsp);
576 /*******************************************************************
577 This handles the kernel oplock break message.
578 *******************************************************************/
580 static void process_kernel_oplock_break(struct messaging_context *msg_ctx,
583 struct server_id src,
587 unsigned long file_id;
589 struct smbd_server_connection *sconn =
590 talloc_get_type_abort(private_data,
591 struct smbd_server_connection);
593 if (data->data == NULL) {
594 DEBUG(0, ("Got NULL buffer\n"));
598 if (data->length != MSG_SMB_KERNEL_BREAK_SIZE) {
599 DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
603 /* Pull the data from the message. */
604 pull_file_id_24((char *)data->data, &id);
605 file_id = (unsigned long)IVAL(data->data, 24);
607 DEBUG(10, ("Got kernel oplock break message from pid %s: %s/%u\n",
608 server_id_str(talloc_tos(), &src), file_id_string_tos(&id),
609 (unsigned int)file_id));
611 fsp = initial_break_processing(sconn, id, file_id);
614 DEBUG(3, ("Got a kernel oplock break message for a file "
615 "I don't know about\n"));
619 if (fsp->sent_oplock_break != NO_BREAK_SENT) {
620 /* This is ok, kernel oplocks come in completely async */
621 DEBUG(3, ("Got a kernel oplock request while waiting for a "
626 if (sconn->using_smb2) {
627 send_break_message_smb2(fsp, OPLOCKLEVEL_NONE);
629 send_break_message_smb1(fsp, OPLOCKLEVEL_NONE);
632 fsp->sent_oplock_break = BREAK_TO_NONE_SENT;
634 add_oplock_timeout_handler(fsp);
637 struct break_to_none_state {
638 struct smbd_server_connection *sconn;
641 static void do_break_to_none(struct tevent_context *ctx,
642 struct tevent_immediate *im,
645 /****************************************************************************
646 This function is called on any file modification or lock request. If a file
647 is level 2 oplocked then it must tell all other level 2 holders to break to
649 ****************************************************************************/
651 static void contend_level2_oplocks_begin_default(files_struct *fsp,
652 enum level2_contention_type type)
654 struct smbd_server_connection *sconn = fsp->conn->sconn;
655 struct tevent_immediate *im;
656 struct break_to_none_state *state;
657 struct byte_range_lock *brl;
660 * If this file is level II oplocked then we need
661 * to grab the shared memory lock and inform all
662 * other files with a level II lock that they need
663 * to flush their read caches. We keep the lock over
664 * the shared memory area whilst doing this.
667 if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
669 * There can't be any level2 oplocks, we're alone.
674 brl = brl_get_locks_readonly(fsp);
675 if ((brl != NULL) && !brl_have_read_oplocks(brl)) {
676 DEBUG(10, ("No read oplocks around\n"));
681 * When we get here we might have a brlock entry locked. Also
682 * locking the share mode entry would violate the locking
683 * order. Breaking level2 oplocks to none is asynchronous
684 * anyway, so we postpone this into an immediate event.
687 state = talloc(sconn, struct break_to_none_state);
689 DEBUG(1, ("talloc failed\n"));
692 state->sconn = sconn;
693 state->id = fsp->file_id;
695 im = tevent_create_immediate(state);
697 DEBUG(1, ("tevent_create_immediate failed\n"));
701 tevent_schedule_immediate(im, sconn->ev_ctx, do_break_to_none, state);
704 static void do_break_to_none(struct tevent_context *ctx,
705 struct tevent_immediate *im,
708 struct break_to_none_state *state = talloc_get_type_abort(
709 private_data, struct break_to_none_state);
710 struct server_id self = messaging_server_id(state->sconn->msg_ctx);
712 struct share_mode_lock *lck;
714 lck = get_existing_share_mode_lock(talloc_tos(), state->id);
716 DEBUG(1, ("release_level_2_oplocks_on_change: failed to lock "
717 "share mode entry for file %s.\n",
718 file_id_string_tos(&state->id)));
722 DEBUG(10,("release_level_2_oplocks_on_change: num_share_modes = %d\n",
723 lck->data->num_share_modes ));
725 for(i = 0; i < lck->data->num_share_modes; i++) {
726 struct share_mode_entry *share_entry = &lck->data->share_modes[i];
727 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
729 if (!is_valid_share_mode_entry(share_entry)) {
734 * As there could have been multiple writes waiting at the
735 * lock_share_entry gate we may not be the first to
736 * enter. Hence the state of the op_types in the share mode
737 * entries may be partly NO_OPLOCK and partly LEVEL_II or FAKE_LEVEL_II
738 * oplock. It will do no harm to re-send break messages to
739 * those smbd's that are still waiting their turn to remove
740 * their LEVEL_II state, and also no harm to ignore existing
741 * NO_OPLOCK states. JRA.
744 DEBUG(10,("release_level_2_oplocks_on_change: "
745 "share_entry[%i]->op_type == %d\n",
746 i, share_entry->op_type ));
748 if (share_entry->op_type == NO_OPLOCK) {
753 if (EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) {
754 DEBUG(0,("release_level_2_oplocks_on_change: PANIC. "
755 "share mode entry %d is an exlusive "
761 share_mode_entry_to_message(msg, share_entry);
764 * Deal with a race condition when breaking level2
765 * oplocks. Don't send all the messages and release
766 * the lock, this allows someone else to come in and
767 * get a level2 lock before any of the messages are
768 * processed, and thus miss getting a break message.
769 * Ensure at least one entry (the one we're breaking)
770 * is processed immediately under the lock and becomes
771 * set as NO_OPLOCK to stop any waiter getting a level2.
775 if (serverid_equal(&self, &share_entry->pid)) {
776 struct files_struct *cur_fsp =
777 initial_break_processing(state->sconn,
779 share_entry->share_file_id);
780 if (cur_fsp != NULL) {
781 wait_before_sending_break();
782 break_level2_to_none_async(cur_fsp);
784 DEBUG(3, ("release_level_2_oplocks_on_change: "
785 "Did not find fsp, ignoring\n"));
788 messaging_send_buf(state->sconn->msg_ctx,
790 MSG_SMB_ASYNC_LEVEL2_BREAK,
791 (uint8 *)msg, sizeof(msg));
795 /* We let the message receivers handle removing the oplock state
796 in the share mode lock db. */
804 void smbd_contend_level2_oplocks_begin(files_struct *fsp,
805 enum level2_contention_type type)
807 struct smbd_server_connection *sconn = fsp->conn->sconn;
808 struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
810 if (koplocks && koplocks->ops->contend_level2_oplocks_begin) {
811 koplocks->ops->contend_level2_oplocks_begin(fsp, type);
815 contend_level2_oplocks_begin_default(fsp, type);
818 void smbd_contend_level2_oplocks_end(files_struct *fsp,
819 enum level2_contention_type type)
821 struct smbd_server_connection *sconn = fsp->conn->sconn;
822 struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
824 /* Only kernel oplocks implement this so far */
825 if (koplocks && koplocks->ops->contend_level2_oplocks_end) {
826 koplocks->ops->contend_level2_oplocks_end(fsp, type);
830 /****************************************************************************
831 Linearize a share mode entry struct to an internal oplock break message.
832 ****************************************************************************/
834 void share_mode_entry_to_message(char *msg, const struct share_mode_entry *e)
836 SIVAL(msg,OP_BREAK_MSG_PID_OFFSET,(uint32)e->pid.pid);
837 SBVAL(msg,OP_BREAK_MSG_MID_OFFSET,e->op_mid);
838 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,e->op_type);
839 SIVAL(msg,OP_BREAK_MSG_ACCESS_MASK_OFFSET,e->access_mask);
840 SIVAL(msg,OP_BREAK_MSG_SHARE_ACCESS_OFFSET,e->share_access);
841 SIVAL(msg,OP_BREAK_MSG_PRIV_OFFSET,e->private_options);
842 SIVAL(msg,OP_BREAK_MSG_TIME_SEC_OFFSET,(uint32_t)e->time.tv_sec);
843 SIVAL(msg,OP_BREAK_MSG_TIME_USEC_OFFSET,(uint32_t)e->time.tv_usec);
844 push_file_id_24(msg+OP_BREAK_MSG_DEV_OFFSET, &e->id);
845 SIVAL(msg,OP_BREAK_MSG_FILE_ID_OFFSET,e->share_file_id);
846 SIVAL(msg,OP_BREAK_MSG_UID_OFFSET,e->uid);
847 SSVAL(msg,OP_BREAK_MSG_FLAGS_OFFSET,e->flags);
848 SIVAL(msg,OP_BREAK_MSG_NAME_HASH_OFFSET,e->name_hash);
849 SIVAL(msg,OP_BREAK_MSG_VNN_OFFSET,e->pid.vnn);
852 /****************************************************************************
853 De-linearize an internal oplock break message to a share mode entry struct.
854 ****************************************************************************/
856 void message_to_share_mode_entry(struct share_mode_entry *e, const char *msg)
858 e->pid.pid = (pid_t)IVAL(msg,OP_BREAK_MSG_PID_OFFSET);
859 e->op_mid = BVAL(msg,OP_BREAK_MSG_MID_OFFSET);
860 e->op_type = SVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET);
861 e->access_mask = IVAL(msg,OP_BREAK_MSG_ACCESS_MASK_OFFSET);
862 e->share_access = IVAL(msg,OP_BREAK_MSG_SHARE_ACCESS_OFFSET);
863 e->private_options = IVAL(msg,OP_BREAK_MSG_PRIV_OFFSET);
864 e->time.tv_sec = (time_t)IVAL(msg,OP_BREAK_MSG_TIME_SEC_OFFSET);
865 e->time.tv_usec = (int)IVAL(msg,OP_BREAK_MSG_TIME_USEC_OFFSET);
866 pull_file_id_24(msg+OP_BREAK_MSG_DEV_OFFSET, &e->id);
867 e->share_file_id = (unsigned long)IVAL(msg,OP_BREAK_MSG_FILE_ID_OFFSET);
868 e->uid = (uint32)IVAL(msg,OP_BREAK_MSG_UID_OFFSET);
869 e->flags = (uint16)SVAL(msg,OP_BREAK_MSG_FLAGS_OFFSET);
870 e->name_hash = IVAL(msg,OP_BREAK_MSG_NAME_HASH_OFFSET);
871 e->pid.vnn = IVAL(msg,OP_BREAK_MSG_VNN_OFFSET);
874 /****************************************************************************
875 Setup oplocks for this process.
876 ****************************************************************************/
878 bool init_oplocks(struct smbd_server_connection *sconn)
880 DEBUG(3,("init_oplocks: initializing messages.\n"));
882 messaging_register(sconn->msg_ctx, sconn, MSG_SMB_BREAK_REQUEST,
883 process_oplock_break_message);
884 messaging_register(sconn->msg_ctx, sconn, MSG_SMB_ASYNC_LEVEL2_BREAK,
885 process_oplock_async_level2_break_message);
886 messaging_register(sconn->msg_ctx, sconn, MSG_SMB_KERNEL_BREAK,
887 process_kernel_oplock_break);
891 void init_kernel_oplocks(struct smbd_server_connection *sconn)
893 struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
895 /* only initialize once */
896 if (koplocks == NULL) {
897 #if HAVE_KERNEL_OPLOCKS_IRIX
898 koplocks = irix_init_kernel_oplocks(sconn);
899 #elif HAVE_KERNEL_OPLOCKS_LINUX
900 koplocks = linux_init_kernel_oplocks(sconn);
902 sconn->oplocks.kernel_ops = koplocks;