17c478bd9Sstevel@tonic-gate /*-
27c478bd9Sstevel@tonic-gate * Copyright (c) 1990, 1993, 1994
37c478bd9Sstevel@tonic-gate * The Regents of the University of California. All rights reserved.
47c478bd9Sstevel@tonic-gate *
57c478bd9Sstevel@tonic-gate * This code is derived from software contributed to Berkeley by
67c478bd9Sstevel@tonic-gate * Mike Olson.
77c478bd9Sstevel@tonic-gate *
87c478bd9Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
97c478bd9Sstevel@tonic-gate * modification, are permitted provided that the following conditions
107c478bd9Sstevel@tonic-gate * are met:
117c478bd9Sstevel@tonic-gate * 1. Redistributions of source code must retain the above copyright
127c478bd9Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
137c478bd9Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
147c478bd9Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
157c478bd9Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
167c478bd9Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software
177c478bd9Sstevel@tonic-gate * must display the following acknowledgement:
187c478bd9Sstevel@tonic-gate * This product includes software developed by the University of
197c478bd9Sstevel@tonic-gate * California, Berkeley and its contributors.
207c478bd9Sstevel@tonic-gate * 4. Neither the name of the University nor the names of its contributors
217c478bd9Sstevel@tonic-gate * may be used to endorse or promote products derived from this software
227c478bd9Sstevel@tonic-gate * without specific prior written permission.
237c478bd9Sstevel@tonic-gate *
247c478bd9Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
257c478bd9Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
267c478bd9Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
277c478bd9Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
287c478bd9Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
297c478bd9Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
307c478bd9Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
317c478bd9Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
327c478bd9Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
337c478bd9Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
347c478bd9Sstevel@tonic-gate * SUCH DAMAGE.
357c478bd9Sstevel@tonic-gate */
367c478bd9Sstevel@tonic-gate
377c478bd9Sstevel@tonic-gate #if defined(LIBC_SCCS) && !defined(lint)
387c478bd9Sstevel@tonic-gate static char sccsid[] = "@(#)bt_close.c 8.7 (Berkeley) 8/17/94";
397c478bd9Sstevel@tonic-gate #endif /* LIBC_SCCS and not lint */
407c478bd9Sstevel@tonic-gate
417c478bd9Sstevel@tonic-gate #include <sys/param.h>
427c478bd9Sstevel@tonic-gate
437c478bd9Sstevel@tonic-gate #include <errno.h>
447c478bd9Sstevel@tonic-gate #include <stdio.h>
457c478bd9Sstevel@tonic-gate #include <stdlib.h>
467c478bd9Sstevel@tonic-gate #include <string.h>
477c478bd9Sstevel@tonic-gate #include <unistd.h>
487c478bd9Sstevel@tonic-gate
497c478bd9Sstevel@tonic-gate #include "db-int.h"
507c478bd9Sstevel@tonic-gate #include "btree.h"
517c478bd9Sstevel@tonic-gate
527c478bd9Sstevel@tonic-gate static int bt_meta __P((BTREE *));
537c478bd9Sstevel@tonic-gate
547c478bd9Sstevel@tonic-gate /*
557c478bd9Sstevel@tonic-gate * BT_CLOSE -- Close a btree.
567c478bd9Sstevel@tonic-gate *
577c478bd9Sstevel@tonic-gate * Parameters:
587c478bd9Sstevel@tonic-gate * dbp: pointer to access method
597c478bd9Sstevel@tonic-gate *
607c478bd9Sstevel@tonic-gate * Returns:
617c478bd9Sstevel@tonic-gate * RET_ERROR, RET_SUCCESS
627c478bd9Sstevel@tonic-gate */
637c478bd9Sstevel@tonic-gate int
__bt_close(dbp)647c478bd9Sstevel@tonic-gate __bt_close(dbp)
657c478bd9Sstevel@tonic-gate DB *dbp;
667c478bd9Sstevel@tonic-gate {
677c478bd9Sstevel@tonic-gate BTREE *t;
687c478bd9Sstevel@tonic-gate int fd;
697c478bd9Sstevel@tonic-gate
707c478bd9Sstevel@tonic-gate t = dbp->internal;
717c478bd9Sstevel@tonic-gate
727c478bd9Sstevel@tonic-gate /* Toss any page pinned across calls. */
737c478bd9Sstevel@tonic-gate if (t->bt_pinned != NULL) {
747c478bd9Sstevel@tonic-gate mpool_put(t->bt_mp, t->bt_pinned, 0);
757c478bd9Sstevel@tonic-gate t->bt_pinned = NULL;
767c478bd9Sstevel@tonic-gate }
777c478bd9Sstevel@tonic-gate
787c478bd9Sstevel@tonic-gate /* Sync the tree. */
797c478bd9Sstevel@tonic-gate if (__bt_sync(dbp, 0) == RET_ERROR)
807c478bd9Sstevel@tonic-gate return (RET_ERROR);
817c478bd9Sstevel@tonic-gate
827c478bd9Sstevel@tonic-gate /* Close the memory pool. */
837c478bd9Sstevel@tonic-gate if (mpool_close(t->bt_mp) == RET_ERROR)
847c478bd9Sstevel@tonic-gate return (RET_ERROR);
857c478bd9Sstevel@tonic-gate
867c478bd9Sstevel@tonic-gate /* Free random memory. */
877c478bd9Sstevel@tonic-gate if (t->bt_cursor.key.data != NULL) {
887c478bd9Sstevel@tonic-gate free(t->bt_cursor.key.data);
897c478bd9Sstevel@tonic-gate t->bt_cursor.key.size = 0;
907c478bd9Sstevel@tonic-gate t->bt_cursor.key.data = NULL;
917c478bd9Sstevel@tonic-gate }
927c478bd9Sstevel@tonic-gate if (t->bt_rkey.data) {
937c478bd9Sstevel@tonic-gate free(t->bt_rkey.data);
947c478bd9Sstevel@tonic-gate t->bt_rkey.size = 0;
957c478bd9Sstevel@tonic-gate t->bt_rkey.data = NULL;
967c478bd9Sstevel@tonic-gate }
977c478bd9Sstevel@tonic-gate if (t->bt_rdata.data) {
987c478bd9Sstevel@tonic-gate free(t->bt_rdata.data);
997c478bd9Sstevel@tonic-gate t->bt_rdata.size = 0;
1007c478bd9Sstevel@tonic-gate t->bt_rdata.data = NULL;
1017c478bd9Sstevel@tonic-gate }
1027c478bd9Sstevel@tonic-gate
1037c478bd9Sstevel@tonic-gate fd = t->bt_fd;
1047c478bd9Sstevel@tonic-gate free(t);
1057c478bd9Sstevel@tonic-gate free(dbp);
1067c478bd9Sstevel@tonic-gate return (close(fd) ? RET_ERROR : RET_SUCCESS);
1077c478bd9Sstevel@tonic-gate }
1087c478bd9Sstevel@tonic-gate
1097c478bd9Sstevel@tonic-gate /*
1107c478bd9Sstevel@tonic-gate * BT_SYNC -- sync the btree to disk.
1117c478bd9Sstevel@tonic-gate *
1127c478bd9Sstevel@tonic-gate * Parameters:
1137c478bd9Sstevel@tonic-gate * dbp: pointer to access method
1147c478bd9Sstevel@tonic-gate *
1157c478bd9Sstevel@tonic-gate * Returns:
1167c478bd9Sstevel@tonic-gate * RET_SUCCESS, RET_ERROR.
1177c478bd9Sstevel@tonic-gate */
1187c478bd9Sstevel@tonic-gate int
__bt_sync(dbp,flags)1197c478bd9Sstevel@tonic-gate __bt_sync(dbp, flags)
1207c478bd9Sstevel@tonic-gate const DB *dbp;
1217c478bd9Sstevel@tonic-gate u_int flags;
1227c478bd9Sstevel@tonic-gate {
1237c478bd9Sstevel@tonic-gate BTREE *t;
1247c478bd9Sstevel@tonic-gate int status;
1257c478bd9Sstevel@tonic-gate
1267c478bd9Sstevel@tonic-gate t = dbp->internal;
1277c478bd9Sstevel@tonic-gate
1287c478bd9Sstevel@tonic-gate /* Toss any page pinned across calls. */
1297c478bd9Sstevel@tonic-gate if (t->bt_pinned != NULL) {
1307c478bd9Sstevel@tonic-gate mpool_put(t->bt_mp, t->bt_pinned, 0);
1317c478bd9Sstevel@tonic-gate t->bt_pinned = NULL;
1327c478bd9Sstevel@tonic-gate }
1337c478bd9Sstevel@tonic-gate
1347c478bd9Sstevel@tonic-gate /* Sync doesn't currently take any flags. */
1357c478bd9Sstevel@tonic-gate if (flags != 0) {
1367c478bd9Sstevel@tonic-gate errno = EINVAL;
1377c478bd9Sstevel@tonic-gate return (RET_ERROR);
1387c478bd9Sstevel@tonic-gate }
1397c478bd9Sstevel@tonic-gate
1407c478bd9Sstevel@tonic-gate if (F_ISSET(t, B_INMEM | B_RDONLY)
1417c478bd9Sstevel@tonic-gate || !F_ISSET(t, B_MODIFIED | B_METADIRTY))
1427c478bd9Sstevel@tonic-gate return (RET_SUCCESS);
1437c478bd9Sstevel@tonic-gate
1447c478bd9Sstevel@tonic-gate if (F_ISSET(t, B_METADIRTY) && bt_meta(t) == RET_ERROR)
1457c478bd9Sstevel@tonic-gate return (RET_ERROR);
1467c478bd9Sstevel@tonic-gate
1477c478bd9Sstevel@tonic-gate if ((status = mpool_sync(t->bt_mp)) == RET_SUCCESS)
1487c478bd9Sstevel@tonic-gate F_CLR(t, B_MODIFIED);
1497c478bd9Sstevel@tonic-gate
1507c478bd9Sstevel@tonic-gate return (status);
1517c478bd9Sstevel@tonic-gate }
1527c478bd9Sstevel@tonic-gate
1537c478bd9Sstevel@tonic-gate /*
1547c478bd9Sstevel@tonic-gate * BT_META -- write the tree meta data to disk.
1557c478bd9Sstevel@tonic-gate *
1567c478bd9Sstevel@tonic-gate * Parameters:
1577c478bd9Sstevel@tonic-gate * t: tree
1587c478bd9Sstevel@tonic-gate *
1597c478bd9Sstevel@tonic-gate * Returns:
1607c478bd9Sstevel@tonic-gate * RET_ERROR, RET_SUCCESS
1617c478bd9Sstevel@tonic-gate */
1627c478bd9Sstevel@tonic-gate static int
bt_meta(t)1637c478bd9Sstevel@tonic-gate bt_meta(t)
1647c478bd9Sstevel@tonic-gate BTREE *t;
1657c478bd9Sstevel@tonic-gate {
1667c478bd9Sstevel@tonic-gate BTMETA m;
1677c478bd9Sstevel@tonic-gate void *p;
1687c478bd9Sstevel@tonic-gate
1697c478bd9Sstevel@tonic-gate if ((p = mpool_get(t->bt_mp, P_META, 0)) == NULL)
1707c478bd9Sstevel@tonic-gate return (RET_ERROR);
1717c478bd9Sstevel@tonic-gate
1727c478bd9Sstevel@tonic-gate /* Fill in metadata. */
1737c478bd9Sstevel@tonic-gate m.magic = BTREEMAGIC;
1747c478bd9Sstevel@tonic-gate m.version = BTREEVERSION;
1757c478bd9Sstevel@tonic-gate m.psize = t->bt_psize;
1767c478bd9Sstevel@tonic-gate m.free = t->bt_free;
1777c478bd9Sstevel@tonic-gate m.nrecs = t->bt_nrecs;
1787c478bd9Sstevel@tonic-gate m.flags = F_ISSET(t, SAVEMETA);
1797c478bd9Sstevel@tonic-gate
1807c478bd9Sstevel@tonic-gate memmove(p, &m, sizeof(BTMETA));
1817c478bd9Sstevel@tonic-gate mpool_put(t->bt_mp, p, MPOOL_DIRTY);
1827c478bd9Sstevel@tonic-gate return (RET_SUCCESS);
1837c478bd9Sstevel@tonic-gate }
184