bt_upgrade.c

00001 /*-
00002  * See the file LICENSE for redistribution information.
00003  *
00004  * Copyright (c) 1996, 1997, 1998, 1999, 2000
00005  * Sleepycat Software. All rights reserved.
00006  */
00007 #include "config.h"
00008 
00009 #ifndef lint
00010 static const char revid[] = "$Id: bt__upgrade_8c-source.html,v 1.1 2008年06月08日 10:13:47 sebdiaz Exp $";
00011 #endif /* not lint */
00012 
00013 #ifndef NO_SYSTEM_INCLUDES
00014 #include <sys/types.h>
00015 
00016 #include <errno.h>
00017 #include <limits.h>
00018 #include <string.h>
00019 #endif
00020 
00021 #include "db_int.h"
00022 #include "db_page.h"
00023 #include "db_swap.h"
00024 #include "btree.h"
00025 #include "db_am.h"
00026 #include "db_upgrade.h"
00027 
00028 /*
00029  * CDB___bam_30_btreemeta --
00030  * Upgrade the metadata pages from version 6 to version 7.
00031  *
00032  * PUBLIC: int CDB___bam_30_btreemeta __P((DB *, char *, u_int8_t *));
00033  */
00034 int
00035 CDB___bam_30_btreemeta(dbp, real_name, buf)
00036 DB *dbp;
00037 char *real_name;
00038 u_int8_t *buf;
00039 {
00040 BTMETA30 *newmeta;
00041 BTMETA2X *oldmeta;
00042 DB_ENV *dbenv;
00043 int ret;
00044 
00045 dbenv = dbp->dbenv;
00046 
00047 newmeta = (BTMETA30 *)buf;
00048 oldmeta = (BTMETA2X *)buf;
00049 
00050 /*
00051  * Move things from the end up, so we do not overwrite things.
00052  * We are going to create a new uid, so we can move the stuff
00053  * at the end of the structure first, overwriting the uid.
00054  */
00055 
00056 newmeta->re_pad = oldmeta->re_pad;
00057 newmeta->re_len = oldmeta->re_len;
00058 newmeta->minkey = oldmeta->minkey;
00059 newmeta->maxkey = oldmeta->maxkey;
00060 newmeta->dbmeta.free = oldmeta->free;
00061 newmeta->dbmeta.flags = oldmeta->flags;
00062 newmeta->dbmeta.type = P_BTREEMETA;
00063 
00064 newmeta->dbmeta.version = 7;
00065 /* Replace the unique ID. */
00066 if ((ret = CDB___os_fileid(dbenv, real_name, 1, buf + 36)) != 0)
00067 return (ret);
00068 
00069 newmeta->root = 1;
00070 
00071 return (0);
00072 }
00073 
00074 /*
00075  * CDB___bam_31_btreemeta --
00076  * Upgrade the database from version 7 to version 8.
00077  *
00078  * PUBLIC: int CDB___bam_31_btreemeta
00079  * PUBLIC: __P((DB *, char *, u_int32_t, DB_FH *, PAGE *, int *));
00080  */
00081 int
00082 CDB___bam_31_btreemeta(dbp, real_name, flags, fhp, h, dirtyp)
00083 DB *dbp;
00084 char *real_name;
00085 u_int32_t flags;
00086 DB_FH *fhp;
00087 PAGE *h;
00088 int *dirtyp;
00089 {
00090 BTMETA31 *newmeta;
00091 BTMETA30 *oldmeta;
00092 
00093 COMPQUIET(dbp, NULL);
00094 COMPQUIET(real_name, NULL);
00095 COMPQUIET(fhp, NULL);
00096 
00097 newmeta = (BTMETA31 *)h;
00098 oldmeta = (BTMETA30 *)h;
00099 
00100 /*
00101  * Copy the effected fields down the page.
00102  * The fields may overlap each other so we
00103  * start at the bottom and use memmove.
00104  */
00105 newmeta->root = oldmeta->root;
00106 newmeta->re_pad = oldmeta->re_pad;
00107 newmeta->re_len = oldmeta->re_len;
00108 newmeta->minkey = oldmeta->minkey;
00109 newmeta->maxkey = oldmeta->maxkey;
00110 memmove(newmeta->dbmeta.uid,
00111 oldmeta->dbmeta.uid, sizeof(oldmeta->dbmeta.uid));
00112 newmeta->dbmeta.flags = oldmeta->dbmeta.flags;
00113 newmeta->dbmeta.record_count = 0;
00114 newmeta->dbmeta.key_count = 0;
00115 ZERO_LSN(newmeta->dbmeta.alloc_lsn);
00116 
00117 /* Set the version number. */
00118 newmeta->dbmeta.version = 8;
00119 
00120 /* Upgrade the flags. */
00121 if (LF_ISSET(DB_DUPSORT))
00122 F_SET(&newmeta->dbmeta, BTM_DUPSORT);
00123 
00124 *dirtyp = 1;
00125 return (0);
00126 }
00127 
00128 /*
00129  * CDB___bam_31_lbtree --
00130  * Upgrade the database btree leaf pages.
00131  *
00132  * PUBLIC: int CDB___bam_31_lbtree
00133  * PUBLIC: __P((DB *, char *, u_int32_t, DB_FH *, PAGE *, int *));
00134  */
00135 int
00136 CDB___bam_31_lbtree(dbp, real_name, flags, fhp, h, dirtyp)
00137 DB *dbp;
00138 char *real_name;
00139 u_int32_t flags;
00140 DB_FH *fhp;
00141 PAGE *h;
00142 int *dirtyp;
00143 {
00144 BKEYDATA *bk;
00145 db_pgno_t pgno;
00146 db_indx_t indx;
00147 int ret;
00148 
00149 ret = 0;
00150 for (indx = O_INDX; indx < NUM_ENT(h); indx += P_INDX) {
00151 bk = GET_BKEYDATA(h, indx);
00152 if (B_TYPE(bk->type) == B_DUPLICATE) {
00153 pgno = GET_BOVERFLOW(h, indx)->pgno;
00154 if ((ret = CDB___db_31_offdup(dbp, real_name, fhp,
00155 LF_ISSET(DB_DUPSORT) ? 1 : 0, &pgno)) != 0)
00156 break;
00157 if (pgno != GET_BOVERFLOW(h, indx)->pgno) {
00158 *dirtyp = 1;
00159 GET_BOVERFLOW(h, indx)->pgno = pgno;
00160 }
00161 }
00162 }
00163 
00164 return (ret);
00165 }