1 /* $NetBSD: rec_close.c,v 1.15 2008/09/11 12:58:00 joerg Exp $ */
2
3 /*-
4 * Copyright (c) 1990, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #if HAVE_NBTOOL_CONFIG_H
33 #include "nbtool_config.h"
34 #endif
35
36 #include <sys/cdefs.h>
37 __RCSID("$NetBSD: rec_close.c,v 1.15 2008/09/11 12:58:00 joerg Exp $");
38
39 #include "namespace.h"
40 #include <sys/types.h>
41 #include <sys/uio.h>
42 #include <sys/mman.h>
43
44 #include <assert.h>
45 #include <errno.h>
46 #include <limits.h>
47 #include <stdio.h>
48 #include <unistd.h>
49
50 #include <db.h>
51 #include "recno.h"
52
53 /*
54 * __REC_CLOSE -- Close a recno tree.
55 *
56 * Parameters:
57 * dbp: pointer to access method
58 *
59 * Returns:
60 * RET_ERROR, RET_SUCCESS
61 */
62 int
__rec_close(DB * dbp)63 __rec_close(DB *dbp)
64 {
65 BTREE *t;
66 int status;
67
68 t = dbp->internal;
69
70 /* Toss any page pinned across calls. */
71 if (t->bt_pinned != NULL) {
72 mpool_put(t->bt_mp, t->bt_pinned, 0);
73 t->bt_pinned = NULL;
74 }
75
76 if (__rec_sync(dbp, 0) == RET_ERROR)
77 return (RET_ERROR);
78
79 /* Committed to closing. */
80 status = RET_SUCCESS;
81 if (F_ISSET(t, R_MEMMAPPED) && munmap(t->bt_smap, t->bt_msize))
82 status = RET_ERROR;
83
84 if (!F_ISSET(t, R_INMEM)) {
85 if (F_ISSET(t, R_CLOSEFP)) {
86 if (fclose(t->bt_rfp))
87 status = RET_ERROR;
88 } else {
89 if (close(t->bt_rfd))
90 status = RET_ERROR;
91 }
92 }
93
94 if (__bt_close(dbp) == RET_ERROR)
95 status = RET_ERROR;
96
97 return (status);
98 }
99
100 /*
101 * __REC_SYNC -- sync the recno tree to disk.
102 *
103 * Parameters:
104 * dbp: pointer to access method
105 *
106 * Returns:
107 * RET_SUCCESS, RET_ERROR.
108 */
109 int
__rec_sync(const DB * dbp,u_int flags)110 __rec_sync(const DB *dbp, u_int flags)
111 {
112 struct iovec iov[2];
113 BTREE *t;
114 DBT data, key;
115 off_t off;
116 recno_t scursor, trec;
117 int status;
118
119 t = dbp->internal;
120
121 /* Toss any page pinned across calls. */
122 if (t->bt_pinned != NULL) {
123 mpool_put(t->bt_mp, t->bt_pinned, 0);
124 t->bt_pinned = NULL;
125 }
126
127 if (flags == R_RECNOSYNC)
128 return (__bt_sync(dbp, 0));
129
130 if (F_ISSET(t, R_RDONLY | R_INMEM) || !F_ISSET(t, R_MODIFIED))
131 return (RET_SUCCESS);
132
133 /* Read any remaining records into the tree. */
134 if (!F_ISSET(t, R_EOF) && t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR)
135 return (RET_ERROR);
136
137 /* Rewind the file descriptor. */
138 if (lseek(t->bt_rfd, (off_t)0, SEEK_SET) != 0)
139 return (RET_ERROR);
140
141 /* Save the cursor. */
142 scursor = t->bt_cursor.rcursor;
143
144 key.size = sizeof(recno_t);
145 key.data = &trec;
146
147 if (F_ISSET(t, R_FIXLEN)) {
148 /*
149 * We assume that fixed length records are all fixed length.
150 * Any that aren't are either EINVAL'd or corrected by the
151 * record put code.
152 */
153 status = (dbp->seq)(dbp, &key, &data, R_FIRST);
154 while (status == RET_SUCCESS) {
155 if (write(t->bt_rfd, data.data, data.size) !=
156 (ssize_t) data.size)
157 return (RET_ERROR);
158 status = (dbp->seq)(dbp, &key, &data, R_NEXT);
159 }
160 } else {
161 iov[1].iov_base = &t->bt_bval;
162 iov[1].iov_len = 1;
163
164 status = (dbp->seq)(dbp, &key, &data, R_FIRST);
165 while (status == RET_SUCCESS) {
166 iov[0].iov_base = data.data;
167 iov[0].iov_len = data.size;
168 if (writev(t->bt_rfd, iov, 2) !=
169 (ssize_t) (data.size + 1))
170 return (RET_ERROR);
171 status = (dbp->seq)(dbp, &key, &data, R_NEXT);
172 }
173 }
174
175 /* Restore the cursor. */
176 t->bt_cursor.rcursor = scursor;
177
178 if (status == RET_ERROR)
179 return (RET_ERROR);
180 if ((off = lseek(t->bt_rfd, (off_t)0, SEEK_CUR)) == -1)
181 return (RET_ERROR);
182 if (ftruncate(t->bt_rfd, off))
183 return (RET_ERROR);
184 F_CLR(t, R_MODIFIED);
185 return (RET_SUCCESS);
186 }
187