2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-2000
5 Copyright (C) Jeremy Allison 1992-2000
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 12 aug 96: Erik.Devriendt@te6.siemens.be
24 added support for shared memory implementation of share mode locking
26 May 1997. Jeremy Allison (jallison@whistle.com). Modified share mode
27 locking to deal with multiple share modes per open file.
29 September 1997. Jeremy Allison (jallison@whistle.com). Added oplock
32 rewrtten completely to use new tdb code. Tridge, Dec '99
34 Added POSIX locking support. Jeremy Allison (jeremy@valinux.com), Apr. 2000.
40 /* the locking database handle */
41 static TDB_CONTEXT *tdb;
43 /****************************************************************************
45 ****************************************************************************/
47 static const char *lock_type_name(enum brl_type lock_type)
49 return (lock_type == READ_LOCK) ? "READ" : "WRITE";
52 /****************************************************************************
53 Utility function called to see if a file region is locked.
54 If check_self is True, then checks on our own fd with the same locking context
55 are still made. If check_self is False, then checks are not made on our own fd
56 with the same locking context are not made.
57 ****************************************************************************/
59 BOOL is_locked(files_struct *fsp,connection_struct *conn,
60 SMB_BIG_UINT count,SMB_BIG_UINT offset,
61 enum brl_type lock_type, BOOL check_self)
63 int snum = SNUM(conn);
69 if (!lp_locking(snum) || !lp_strict_locking(snum))
72 ret = !brl_locktest(fsp->dev, fsp->inode, fsp->fnum,
73 global_smbpid, sys_getpid(), conn->cnum,
74 offset, count, lock_type, check_self);
76 DEBUG(10,("is_locked: brl start=%.0f len=%.0f %s for file %s\n",
77 (double)offset, (double)count, ret ? "locked" : "unlocked",
81 * There is no lock held by an SMB daemon, check to
82 * see if there is a POSIX lock from a UNIX or NFS process.
85 if(!ret && lp_posix_locking(snum)) {
86 ret = is_posix_locked(fsp, offset, count, lock_type);
88 DEBUG(10,("is_locked: posix start=%.0f len=%.0f %s for file %s\n",
89 (double)offset, (double)count, ret ? "locked" : "unlocked",
96 /****************************************************************************
97 Utility function called by locking requests.
98 ****************************************************************************/
100 static NTSTATUS do_lock(files_struct *fsp,connection_struct *conn, uint16 lock_pid,
101 SMB_BIG_UINT count,SMB_BIG_UINT offset,enum brl_type lock_type)
103 NTSTATUS status = NT_STATUS_LOCK_NOT_GRANTED;
105 if (!lp_locking(SNUM(conn)))
108 /* NOTE! 0 byte long ranges ARE allowed and should be stored */
110 DEBUG(10,("do_lock: lock type %s start=%.0f len=%.0f requested for file %s\n",
111 lock_type_name(lock_type), (double)offset, (double)count, fsp->fsp_name ));
113 if (OPEN_FSP(fsp) && fsp->can_lock && (fsp->conn == conn)) {
114 status = brl_lock(fsp->dev, fsp->inode, fsp->fnum,
115 lock_pid, sys_getpid(), conn->cnum,
119 if (NT_STATUS_IS_OK(status) && lp_posix_locking(SNUM(conn))) {
122 * Try and get a POSIX lock on this range.
123 * Note that this is ok if it is a read lock
124 * overlapping on a different fd. JRA.
127 if (!set_posix_lock(fsp, offset, count, lock_type)) {
128 if (errno == EACCES || errno == EAGAIN)
129 status = NT_STATUS_FILE_LOCK_CONFLICT;
131 status = map_nt_error_from_unix(errno);
134 * We failed to map - we must now remove the brl
137 (void)brl_unlock(fsp->dev, fsp->inode, fsp->fnum,
138 lock_pid, sys_getpid(), conn->cnum,
139 offset, count, False,
148 /****************************************************************************
149 Utility function called by locking requests. This is *DISGUSTING*. It also
150 appears to be "What Windows Does" (tm). Andrew, ever wonder why Windows 2000
151 is so slow on the locking tests...... ? This is the reason. Much though I hate
152 it, we need this. JRA.
153 ****************************************************************************/
155 NTSTATUS do_lock_spin(files_struct *fsp,connection_struct *conn, uint16 lock_pid,
156 SMB_BIG_UINT count,SMB_BIG_UINT offset,enum brl_type lock_type)
158 int j, maxj = lp_lock_spin_count();
159 int sleeptime = lp_lock_sleep_time();
160 NTSTATUS status, ret;
165 ret = NT_STATUS_OK; /* to keep dumb compilers happy */
167 for (j = 0; j < maxj; j++) {
168 status = do_lock(fsp, conn, lock_pid, count, offset, lock_type);
169 if (!NT_STATUS_EQUAL(status, NT_STATUS_LOCK_NOT_GRANTED) &&
170 !NT_STATUS_EQUAL(status, NT_STATUS_FILE_LOCK_CONFLICT)) {
173 /* if we do fail then return the first error code we got */
178 sys_usleep(sleeptime);
183 /* Struct passed to brl_unlock. */
184 struct posix_unlock_data_struct {
190 /****************************************************************************
191 Function passed to brl_unlock to allow POSIX unlock to be done first.
192 ****************************************************************************/
194 static void posix_unlock(void *pre_data)
196 struct posix_unlock_data_struct *pdata = (struct posix_unlock_data_struct *)pre_data;
198 if (lp_posix_locking(SNUM(pdata->fsp->conn)))
199 release_posix_lock(pdata->fsp, pdata->offset, pdata->count);
202 /****************************************************************************
203 Utility function called by unlocking requests.
204 ****************************************************************************/
206 NTSTATUS do_unlock(files_struct *fsp,connection_struct *conn, uint16 lock_pid,
207 SMB_BIG_UINT count,SMB_BIG_UINT offset)
210 struct posix_unlock_data_struct posix_data;
212 if (!lp_locking(SNUM(conn)))
215 if (!OPEN_FSP(fsp) || !fsp->can_lock || (fsp->conn != conn)) {
216 return NT_STATUS_INVALID_HANDLE;
219 DEBUG(10,("do_unlock: unlock start=%.0f len=%.0f requested for file %s\n",
220 (double)offset, (double)count, fsp->fsp_name ));
223 * Remove the existing lock record from the tdb lockdb
224 * before looking at POSIX locks. If this record doesn't
225 * match then don't bother looking to remove POSIX locks.
228 posix_data.fsp = fsp;
229 posix_data.offset = offset;
230 posix_data.count = count;
232 ok = brl_unlock(fsp->dev, fsp->inode, fsp->fnum,
233 lock_pid, sys_getpid(), conn->cnum, offset, count,
234 False, posix_unlock, (void *)&posix_data);
237 DEBUG(10,("do_unlock: returning ERRlock.\n" ));
238 return NT_STATUS_RANGE_NOT_LOCKED;
243 /****************************************************************************
244 Remove any locks on this fd. Called from file_close().
245 ****************************************************************************/
247 void locking_close_file(files_struct *fsp)
249 pid_t pid = sys_getpid();
251 if (!lp_locking(SNUM(fsp->conn)))
255 * Just release all the brl locks, no need to release individually.
258 brl_close(fsp->dev, fsp->inode, pid, fsp->conn->cnum, fsp->fnum);
260 if(lp_posix_locking(SNUM(fsp->conn))) {
263 * Release all the POSIX locks.
265 posix_locking_close_file(fsp);
270 /****************************************************************************
271 Initialise the locking functions.
272 ****************************************************************************/
274 static int open_read_only;
276 BOOL locking_init(int read_only)
283 tdb = tdb_open_log(lock_path("locking.tdb"),
284 0, TDB_DEFAULT|(read_only?0x0:TDB_CLEAR_IF_FIRST),
285 read_only?O_RDONLY:O_RDWR|O_CREAT,
289 DEBUG(0,("ERROR: Failed to initialise locking database\n"));
293 if (!posix_locking_init(read_only))
296 open_read_only = read_only;
301 /*******************************************************************
302 Deinitialize the share_mode management.
303 ******************************************************************/
305 BOOL locking_end(void)
308 brl_shutdown(open_read_only);
311 if (tdb_close(tdb) != 0)
318 /*******************************************************************
319 Form a static locking key for a dev/inode pair.
320 ******************************************************************/
322 static TDB_DATA locking_key(SMB_DEV_T dev, SMB_INO_T inode)
324 static struct locking_key key;
327 memset(&key, '\0', sizeof(key));
330 kbuf.dptr = (char *)&key;
331 kbuf.dsize = sizeof(key);
335 static TDB_DATA locking_key_fsp(files_struct *fsp)
337 return locking_key(fsp->dev, fsp->inode);
340 /*******************************************************************
341 Lock a hash bucket entry.
342 ******************************************************************/
344 BOOL lock_share_entry(connection_struct *conn,
345 SMB_DEV_T dev, SMB_INO_T inode)
347 return tdb_chainlock(tdb, locking_key(dev, inode)) == 0;
350 /*******************************************************************
351 Unlock a hash bucket entry.
352 ******************************************************************/
354 void unlock_share_entry(connection_struct *conn,
355 SMB_DEV_T dev, SMB_INO_T inode)
357 tdb_chainunlock(tdb, locking_key(dev, inode));
360 /*******************************************************************
361 Lock a hash bucket entry. use a fsp for convenience
362 ******************************************************************/
364 BOOL lock_share_entry_fsp(files_struct *fsp)
366 return tdb_chainlock(tdb, locking_key(fsp->dev, fsp->inode)) == 0;
369 /*******************************************************************
370 Unlock a hash bucket entry.
371 ******************************************************************/
373 void unlock_share_entry_fsp(files_struct *fsp)
375 tdb_chainunlock(tdb, locking_key(fsp->dev, fsp->inode));
378 /*******************************************************************
379 Print out a share mode.
380 ********************************************************************/
382 char *share_mode_str(int num, share_mode_entry *e)
384 static pstring share_str;
386 slprintf(share_str, sizeof(share_str)-1, "share_mode_entry[%d]: \
387 pid = %lu, share_mode = 0x%x, desired_access = 0x%x, port = 0x%x, type= 0x%x, file_id = %lu, dev = 0x%x, inode = %.0f",
388 num, (unsigned long)e->pid, e->share_mode, (unsigned int)e->desired_access, e->op_port, e->op_type, e->share_file_id,
389 (unsigned int)e->dev, (double)e->inode );
394 /*******************************************************************
395 Print out a share mode table.
396 ********************************************************************/
398 static void print_share_mode_table(struct locking_data *data)
400 int num_share_modes = data->u.num_share_mode_entries;
401 share_mode_entry *shares = (share_mode_entry *)(data + 1);
404 for (i = 0; i < num_share_modes; i++) {
405 share_mode_entry *entry_p = &shares[i];
406 DEBUG(10,("print_share_mode_table: %s\n", share_mode_str(i, entry_p) ));
410 /*******************************************************************
411 Get all share mode entries for a dev/inode pair.
412 ********************************************************************/
414 int get_share_modes(connection_struct *conn,
415 SMB_DEV_T dev, SMB_INO_T inode,
416 share_mode_entry **pp_shares)
419 struct locking_data *data;
421 share_mode_entry *shares = NULL;
425 dbuf = tdb_fetch(tdb, locking_key(dev, inode));
429 data = (struct locking_data *)dbuf.dptr;
430 num_share_modes = data->u.num_share_mode_entries;
431 if(num_share_modes) {
435 shares = (share_mode_entry *)memdup(dbuf.dptr + sizeof(*data),
436 num_share_modes * sizeof(share_mode_entry));
439 SAFE_FREE(dbuf.dptr);
444 * Ensure that each entry has a real process attached.
447 for (i = 0; i < num_share_modes; ) {
448 share_mode_entry *entry_p = &shares[i];
449 if (process_exists(entry_p->pid)) {
450 DEBUG(10,("get_share_modes: %s\n", share_mode_str(i, entry_p) ));
453 DEBUG(10,("get_share_modes: deleted %s\n", share_mode_str(i, entry_p) ));
454 memcpy( &shares[i], &shares[i+1],
455 sizeof(share_mode_entry) * (num_share_modes - i - 1));
461 /* Did we delete any ? If so, re-store in tdb. */
463 data->u.num_share_mode_entries = num_share_modes;
466 memcpy(dbuf.dptr + sizeof(*data), shares,
467 num_share_modes * sizeof(share_mode_entry));
469 /* The record has shrunk a bit */
470 dbuf.dsize -= del_count * sizeof(share_mode_entry);
472 if (tdb_store(tdb, locking_key(dev, inode), dbuf, TDB_REPLACE) == -1) {
474 SAFE_FREE(dbuf.dptr);
480 SAFE_FREE(dbuf.dptr);
482 return num_share_modes;
485 /*******************************************************************
486 Fill a share mode entry.
487 ********************************************************************/
489 static void fill_share_mode(char *p, files_struct *fsp, uint16 port, uint16 op_type)
491 share_mode_entry *e = (share_mode_entry *)p;
492 void *x = &e->time; /* Needed to force alignment. p may not be aligned.... */
494 memset(e, '\0', sizeof(share_mode_entry));
495 e->pid = sys_getpid();
496 e->share_mode = fsp->share_mode;
497 e->desired_access = fsp->desired_access;
499 e->op_type = op_type;
500 memcpy(x, &fsp->open_time, sizeof(struct timeval));
501 e->share_file_id = fsp->file_id;
503 e->inode = fsp->inode;
506 /*******************************************************************
507 Check if two share mode entries are identical, ignoring oplock
508 and port info and desired_access.
509 ********************************************************************/
511 BOOL share_modes_identical( share_mode_entry *e1, share_mode_entry *e2)
513 #if 1 /* JRA PARANOIA TEST - REMOVE LATER */
514 if (e1->pid == e2->pid &&
515 e1->share_file_id == e2->share_file_id &&
516 e1->dev == e2->dev &&
517 e1->inode == e2->inode &&
518 (e1->share_mode & ~DELETE_ON_CLOSE_FLAG) != (e2->share_mode & ~DELETE_ON_CLOSE_FLAG)) {
519 DEBUG(0,("PANIC: share_modes_identical: share_mode missmatch (e1 = %u, e2 = %u). Logic error.\n",
520 (unsigned int)(e1->share_mode & ~DELETE_ON_CLOSE_FLAG),
521 (unsigned int)(e2->share_mode & ~DELETE_ON_CLOSE_FLAG) ));
522 smb_panic("PANIC: share_modes_identical logic error.\n");
526 return (e1->pid == e2->pid &&
527 (e1->share_mode & ~DELETE_ON_CLOSE_FLAG) == (e2->share_mode & ~DELETE_ON_CLOSE_FLAG) &&
528 e1->dev == e2->dev &&
529 e1->inode == e2->inode &&
530 e1->share_file_id == e2->share_file_id );
533 /*******************************************************************
534 Delete a specific share mode. Return the number
535 of entries left, and a memdup'ed copy of the entry deleted (if required).
536 Ignore if no entry deleted.
537 ********************************************************************/
539 ssize_t del_share_entry( SMB_DEV_T dev, SMB_INO_T inode,
540 share_mode_entry *entry, share_mode_entry **ppse)
543 struct locking_data *data;
545 share_mode_entry *shares;
551 /* read in the existing share modes */
552 dbuf = tdb_fetch(tdb, locking_key(dev, inode));
556 data = (struct locking_data *)dbuf.dptr;
557 shares = (share_mode_entry *)(dbuf.dptr + sizeof(*data));
560 * Find any with this pid and delete it
561 * by overwriting with the rest of the data
565 DEBUG(10,("del_share_entry: num_share_modes = %d\n", data->u.num_share_mode_entries ));
567 for (i=0;i<data->u.num_share_mode_entries;) {
568 if (share_modes_identical(&shares[i], entry)) {
569 DEBUG(10,("del_share_entry: deleted %s\n",
570 share_mode_str(i, &shares[i]) ));
572 *ppse = memdup(&shares[i], sizeof(*shares));
573 data->u.num_share_mode_entries--;
574 memmove(&shares[i], &shares[i+1],
575 dbuf.dsize - (sizeof(*data) + (i+1)*sizeof(*shares)));
578 DEBUG(10,("del_share_entry: deleting entry %d\n", i ));
586 /* the record may have shrunk a bit */
587 dbuf.dsize -= del_count * sizeof(*shares);
589 count = (ssize_t)data->u.num_share_mode_entries;
591 /* store it back in the database */
592 if (data->u.num_share_mode_entries == 0) {
593 if (tdb_delete(tdb, locking_key(dev, inode)) == -1)
596 if (tdb_store(tdb, locking_key(dev, inode), dbuf, TDB_REPLACE) == -1)
600 DEBUG(10,("del_share_entry: Remaining table.\n"));
601 print_share_mode_table((struct locking_data *)dbuf.dptr);
602 SAFE_FREE(dbuf.dptr);
606 /*******************************************************************
607 Del the share mode of a file for this process. Return the number
608 of entries left, and a memdup'ed copy of the entry deleted.
609 ********************************************************************/
611 ssize_t del_share_mode(files_struct *fsp, share_mode_entry **ppse)
613 share_mode_entry entry;
616 * Fake up a share_mode_entry for comparisons.
619 fill_share_mode((char *)&entry, fsp, 0, 0);
620 return del_share_entry(fsp->dev, fsp->inode, &entry, ppse);
623 /*******************************************************************
624 Set the share mode of a file. Return False on fail, True on success.
625 ********************************************************************/
627 BOOL set_share_mode(files_struct *fsp, uint16 port, uint16 op_type)
630 struct locking_data *data;
635 /* read in the existing share modes if any */
636 dbuf = tdb_fetch(tdb, locking_key_fsp(fsp));
639 /* we'll need to create a new record */
642 pstrcpy(fname, fsp->conn->connectpath);
644 pstrcat(fname, fsp->fsp_name);
646 size = sizeof(*data) + sizeof(share_mode_entry) + strlen(fname) + 1;
647 p = (char *)malloc(size);
650 data = (struct locking_data *)p;
651 data->u.num_share_mode_entries = 1;
653 DEBUG(10,("set_share_mode: creating entry for file %s. num_share_modes = 1\n",
656 offset = sizeof(*data) + sizeof(share_mode_entry);
657 safe_strcpy(p + offset, fname, size - offset - 1);
658 fill_share_mode(p + sizeof(*data), fsp, port, op_type);
661 if (tdb_store(tdb, locking_key_fsp(fsp), dbuf, TDB_REPLACE) == -1)
664 print_share_mode_table((struct locking_data *)p);
670 /* we're adding to an existing entry - this is a bit fiddly */
671 data = (struct locking_data *)dbuf.dptr;
673 data->u.num_share_mode_entries++;
675 DEBUG(10,("set_share_mode: adding entry for file %s. new num_share_modes = %d\n",
676 fsp->fsp_name, data->u.num_share_mode_entries ));
678 size = dbuf.dsize + sizeof(share_mode_entry);
681 SAFE_FREE(dbuf.dptr);
684 memcpy(p, dbuf.dptr, sizeof(*data));
685 fill_share_mode(p + sizeof(*data), fsp, port, op_type);
686 memcpy(p + sizeof(*data) + sizeof(share_mode_entry), dbuf.dptr + sizeof(*data),
687 dbuf.dsize - sizeof(*data));
688 SAFE_FREE(dbuf.dptr);
691 if (tdb_store(tdb, locking_key_fsp(fsp), dbuf, TDB_REPLACE) == -1)
693 print_share_mode_table((struct locking_data *)p);
698 /*******************************************************************
699 A generic in-place modification call for share mode entries.
700 ********************************************************************/
702 static BOOL mod_share_mode( SMB_DEV_T dev, SMB_INO_T inode, share_mode_entry *entry,
703 void (*mod_fn)(share_mode_entry *, SMB_DEV_T, SMB_INO_T, void *),
707 struct locking_data *data;
709 share_mode_entry *shares;
710 BOOL need_store=False;
713 /* read in the existing share modes */
714 dbuf = tdb_fetch(tdb, locking_key(dev, inode));
718 data = (struct locking_data *)dbuf.dptr;
719 shares = (share_mode_entry *)(dbuf.dptr + sizeof(*data));
721 /* find any with our pid and call the supplied function */
722 for (i=0;i<data->u.num_share_mode_entries;i++) {
723 if (share_modes_identical(entry, &shares[i])) {
724 mod_fn(&shares[i], dev, inode, param);
729 /* if the mod fn was called then store it back */
731 if (data->u.num_share_mode_entries == 0) {
732 if (tdb_delete(tdb, locking_key(dev, inode)) == -1)
735 if (tdb_store(tdb, locking_key(dev, inode), dbuf, TDB_REPLACE) == -1)
740 SAFE_FREE(dbuf.dptr);
744 /*******************************************************************
745 Static function that actually does the work for the generic function
747 ********************************************************************/
749 static void remove_share_oplock_fn(share_mode_entry *entry, SMB_DEV_T dev, SMB_INO_T inode,
752 DEBUG(10,("remove_share_oplock_fn: removing oplock info for entry dev=%x ino=%.0f\n",
753 (unsigned int)dev, (double)inode ));
754 /* Delete the oplock info. */
756 entry->op_type = NO_OPLOCK;
759 /*******************************************************************
760 Remove an oplock port and mode entry from a share mode.
761 ********************************************************************/
763 BOOL remove_share_oplock(files_struct *fsp)
765 share_mode_entry entry;
767 * Fake up an entry for comparisons...
769 fill_share_mode((char *)&entry, fsp, 0, 0);
770 return mod_share_mode(fsp->dev, fsp->inode, &entry, remove_share_oplock_fn, NULL);
773 /*******************************************************************
774 Static function that actually does the work for the generic function
776 ********************************************************************/
778 static void downgrade_share_oplock_fn(share_mode_entry *entry, SMB_DEV_T dev, SMB_INO_T inode,
781 DEBUG(10,("downgrade_share_oplock_fn: downgrading oplock info for entry dev=%x ino=%.0f\n",
782 (unsigned int)dev, (double)inode ));
783 entry->op_type = LEVEL_II_OPLOCK;
786 /*******************************************************************
787 Downgrade a oplock type from exclusive to level II.
788 ********************************************************************/
790 BOOL downgrade_share_oplock(files_struct *fsp)
792 share_mode_entry entry;
794 * Fake up an entry for comparisons...
796 fill_share_mode((char *)&entry, fsp, 0, 0);
797 return mod_share_mode(fsp->dev, fsp->inode, &entry, downgrade_share_oplock_fn, NULL);
800 /*******************************************************************
801 Get/Set the delete on close flag in a set of share modes.
802 Return False on fail, True on success.
803 ********************************************************************/
805 BOOL modify_delete_flag( SMB_DEV_T dev, SMB_INO_T inode, BOOL delete_on_close)
808 struct locking_data *data;
810 share_mode_entry *shares;
812 /* read in the existing share modes */
813 dbuf = tdb_fetch(tdb, locking_key(dev, inode));
817 data = (struct locking_data *)dbuf.dptr;
818 shares = (share_mode_entry *)(dbuf.dptr + sizeof(*data));
820 /* Set/Unset the delete on close element. */
821 for (i=0;i<data->u.num_share_mode_entries;i++,shares++) {
822 shares->share_mode = (delete_on_close ?
823 (shares->share_mode | DELETE_ON_CLOSE_FLAG) :
824 (shares->share_mode & ~DELETE_ON_CLOSE_FLAG) );
828 if (data->u.num_share_mode_entries) {
829 if (tdb_store(tdb, locking_key(dev,inode), dbuf, TDB_REPLACE)==-1) {
830 SAFE_FREE(dbuf.dptr);
835 SAFE_FREE(dbuf.dptr);
839 /****************************************************************************
840 Traverse the whole database with this function, calling traverse_callback
842 ****************************************************************************/
844 static int traverse_fn(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf,
847 struct locking_data *data;
848 share_mode_entry *shares;
852 SHAREMODE_FN(traverse_callback) = (SHAREMODE_FN_CAST())state;
854 data = (struct locking_data *)dbuf.dptr;
855 shares = (share_mode_entry *)(dbuf.dptr + sizeof(*data));
856 name = dbuf.dptr + sizeof(*data) + data->u.num_share_mode_entries*sizeof(*shares);
858 for (i=0;i<data->u.num_share_mode_entries;i++) {
859 traverse_callback(&shares[i], name);
864 /*******************************************************************
865 Call the specified function on each entry under management by the
867 ********************************************************************/
869 int share_mode_forall(SHAREMODE_FN(fn))
873 return tdb_traverse(tdb, traverse_fn, (void*)fn);