1 /*- 2 * Copyright (c) 1990, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Mike Olson. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #if defined(LIBC_SCCS) && !defined(lint) 34 static char sccsid[] = "@(#)bt_close.c 8.7 (Berkeley) 8/17/94"; 35 #endif /* LIBC_SCCS and not lint */ 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include "namespace.h" 40 #include <sys/param.h> 41 42 #include <errno.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include "un-namespace.h" 48 49 #include <db.h> 50 #include "btree.h" 51 52 static int bt_meta(BTREE *); 53 54 /* 55 * BT_CLOSE -- Close a btree. 56 * 57 * Parameters: 58 * dbp: pointer to access method 59 * 60 * Returns: 61 * RET_ERROR, RET_SUCCESS 62 */ 63 int 64 __bt_close(dbp) 65 DB *dbp; 66 { 67 BTREE *t; 68 int fd; 69 70 t = dbp->internal; 71 72 /* Toss any page pinned across calls. */ 73 if (t->bt_pinned != NULL) { 74 mpool_put(t->bt_mp, t->bt_pinned, 0); 75 t->bt_pinned = NULL; 76 } 77 78 /* Sync the tree. */ 79 if (__bt_sync(dbp, 0) == RET_ERROR) 80 return (RET_ERROR); 81 82 /* Close the memory pool. */ 83 if (mpool_close(t->bt_mp) == RET_ERROR) 84 return (RET_ERROR); 85 86 /* Free random memory. */ 87 if (t->bt_cursor.key.data != NULL) { 88 free(t->bt_cursor.key.data); 89 t->bt_cursor.key.size = 0; 90 t->bt_cursor.key.data = NULL; 91 } 92 if (t->bt_rkey.data) { 93 free(t->bt_rkey.data); 94 t->bt_rkey.size = 0; 95 t->bt_rkey.data = NULL; 96 } 97 if (t->bt_rdata.data) { 98 free(t->bt_rdata.data); 99 t->bt_rdata.size = 0; 100 t->bt_rdata.data = NULL; 101 } 102 103 fd = t->bt_fd; 104 free(t); 105 free(dbp); 106 return (_close(fd) ? RET_ERROR : RET_SUCCESS); 107 } 108 109 /* 110 * BT_SYNC -- sync the btree to disk. 111 * 112 * Parameters: 113 * dbp: pointer to access method 114 * 115 * Returns: 116 * RET_SUCCESS, RET_ERROR. 117 */ 118 int 119 __bt_sync(dbp, flags) 120 const DB *dbp; 121 u_int flags; 122 { 123 BTREE *t; 124 int status; 125 126 t = dbp->internal; 127 128 /* Toss any page pinned across calls. */ 129 if (t->bt_pinned != NULL) { 130 mpool_put(t->bt_mp, t->bt_pinned, 0); 131 t->bt_pinned = NULL; 132 } 133 134 /* Sync doesn't currently take any flags. */ 135 if (flags != 0) { 136 errno = EINVAL; 137 return (RET_ERROR); 138 } 139 140 if (F_ISSET(t, B_INMEM | B_RDONLY) || !F_ISSET(t, B_MODIFIED)) 141 return (RET_SUCCESS); 142 143 if (F_ISSET(t, B_METADIRTY) && bt_meta(t) == RET_ERROR) 144 return (RET_ERROR); 145 146 if ((status = mpool_sync(t->bt_mp)) == RET_SUCCESS) 147 F_CLR(t, B_MODIFIED); 148 149 return (status); 150 } 151 152 /* 153 * BT_META -- write the tree meta data to disk. 154 * 155 * Parameters: 156 * t: tree 157 * 158 * Returns: 159 * RET_ERROR, RET_SUCCESS 160 */ 161 static int 162 bt_meta(t) 163 BTREE *t; 164 { 165 BTMETA m; 166 void *p; 167 168 if ((p = mpool_get(t->bt_mp, P_META, 0)) == NULL) 169 return (RET_ERROR); 170 171 /* Fill in metadata. */ 172 m.magic = BTREEMAGIC; 173 m.version = BTREEVERSION; 174 m.psize = t->bt_psize; 175 m.free = t->bt_free; 176 m.nrecs = t->bt_nrecs; 177 m.flags = F_ISSET(t, SAVEMETA); 178 179 memmove(p, &m, sizeof(BTMETA)); 180 mpool_put(t->bt_mp, p, MPOOL_DIRTY); 181 return (RET_SUCCESS); 182 } 183