1 /*- 2 * Copyright (c) 1990, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char sccsid[] = "@(#)rec_close.c 8.6 (Berkeley) 8/18/94"; 32 #endif /* LIBC_SCCS and not lint */ 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include "namespace.h" 37 #include <sys/types.h> 38 #include <sys/uio.h> 39 #include <sys/mman.h> 40 41 #include <errno.h> 42 #include <limits.h> 43 #include <stdio.h> 44 #include <unistd.h> 45 #include "un-namespace.h" 46 47 #include <db.h> 48 #include "recno.h" 49 50 /* 51 * __REC_CLOSE -- Close a recno tree. 52 * 53 * Parameters: 54 * dbp: pointer to access method 55 * 56 * Returns: 57 * RET_ERROR, RET_SUCCESS 58 */ 59 int 60 __rec_close(dbp) 61 DB *dbp; 62 { 63 BTREE *t; 64 int status; 65 66 t = dbp->internal; 67 68 /* Toss any page pinned across calls. */ 69 if (t->bt_pinned != NULL) { 70 mpool_put(t->bt_mp, t->bt_pinned, 0); 71 t->bt_pinned = NULL; 72 } 73 74 if (__rec_sync(dbp, 0) == RET_ERROR) 75 return (RET_ERROR); 76 77 /* Committed to closing. */ 78 status = RET_SUCCESS; 79 if (F_ISSET(t, R_MEMMAPPED) && munmap(t->bt_smap, t->bt_msize)) 80 status = RET_ERROR; 81 82 if (!F_ISSET(t, R_INMEM)) { 83 if (F_ISSET(t, R_CLOSEFP)) { 84 if (fclose(t->bt_rfp)) 85 status = RET_ERROR; 86 } else 87 if (_close(t->bt_rfd)) 88 status = RET_ERROR; 89 } 90 91 if (__bt_close(dbp) == RET_ERROR) 92 status = RET_ERROR; 93 94 return (status); 95 } 96 97 /* 98 * __REC_SYNC -- sync the recno tree to disk. 99 * 100 * Parameters: 101 * dbp: pointer to access method 102 * 103 * Returns: 104 * RET_SUCCESS, RET_ERROR. 105 */ 106 int 107 __rec_sync(dbp, flags) 108 const DB *dbp; 109 u_int flags; 110 { 111 struct iovec iov[2]; 112 BTREE *t; 113 DBT data, key; 114 off_t off; 115 recno_t scursor, trec; 116 int status; 117 118 t = dbp->internal; 119 120 /* Toss any page pinned across calls. */ 121 if (t->bt_pinned != NULL) { 122 mpool_put(t->bt_mp, t->bt_pinned, 0); 123 t->bt_pinned = NULL; 124 } 125 126 if (flags == R_RECNOSYNC) 127 return (__bt_sync(dbp, 0)); 128 129 if (F_ISSET(t, R_RDONLY | R_INMEM) || !F_ISSET(t, R_MODIFIED)) 130 return (RET_SUCCESS); 131 132 /* Read any remaining records into the tree. */ 133 if (!F_ISSET(t, R_EOF) && t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR) 134 return (RET_ERROR); 135 136 /* Rewind the file descriptor. */ 137 if (lseek(t->bt_rfd, (off_t)0, SEEK_SET) != 0) 138 return (RET_ERROR); 139 140 /* Save the cursor. */ 141 scursor = t->bt_cursor.rcursor; 142 143 key.size = sizeof(recno_t); 144 key.data = &trec; 145 146 if (F_ISSET(t, R_FIXLEN)) { 147 /* 148 * We assume that fixed length records are all fixed length. 149 * Any that aren't are either EINVAL'd or corrected by the 150 * record put code. 151 */ 152 status = (dbp->seq)(dbp, &key, &data, R_FIRST); 153 while (status == RET_SUCCESS) { 154 if (_write(t->bt_rfd, data.data, data.size) != 155 data.size) 156 return (RET_ERROR); 157 status = (dbp->seq)(dbp, &key, &data, R_NEXT); 158 } 159 } else { 160 iov[1].iov_base = (char *)&t->bt_bval; 161 iov[1].iov_len = 1; 162 163 status = (dbp->seq)(dbp, &key, &data, R_FIRST); 164 while (status == RET_SUCCESS) { 165 iov[0].iov_base = data.data; 166 iov[0].iov_len = data.size; 167 if (_writev(t->bt_rfd, iov, 2) != data.size + 1) 168 return (RET_ERROR); 169 status = (dbp->seq)(dbp, &key, &data, R_NEXT); 170 } 171 } 172 173 /* Restore the cursor. */ 174 t->bt_cursor.rcursor = scursor; 175 176 if (status == RET_ERROR) 177 return (RET_ERROR); 178 if ((off = lseek(t->bt_rfd, (off_t)0, SEEK_CUR)) == -1) 179 return (RET_ERROR); 180 if (ftruncate(t->bt_rfd, off)) 181 return (RET_ERROR); 182 F_CLR(t, R_MODIFIED); 183 return (RET_SUCCESS); 184 } 185