| 1 | /*- |
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| 2 | * See the file LICENSE for redistribution information. |
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| 3 | * |
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| 4 | * Copyright (c) 1996-2002 |
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| 5 | * Sleepycat Software. All rights reserved. |
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| 6 | * |
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| 7 | * Id: btree.src,v 10.35 2002/04/17 19:02:56 krinsky Exp |
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| 8 | */ |
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| 9 | |
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| 10 | PREFIX __bam |
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| 11 | DBPRIVATE |
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| 12 | |
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| 13 | INCLUDE #include "db_config.h" |
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| 14 | INCLUDE |
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| 15 | INCLUDE #ifndef NO_SYSTEM_INCLUDES |
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| 16 | INCLUDE #include <sys/types.h> |
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| 17 | INCLUDE |
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| 18 | INCLUDE #include <ctype.h> |
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| 19 | INCLUDE #include <string.h> |
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| 20 | INCLUDE #endif |
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| 21 | INCLUDE |
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| 22 | INCLUDE #include "db_int.h" |
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| 23 | INCLUDE #include "dbinc/crypto.h" |
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| 24 | INCLUDE #include "dbinc/db_page.h" |
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| 25 | INCLUDE #include "dbinc/db_dispatch.h" |
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| 26 | INCLUDE #include "dbinc/db_am.h" |
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| 27 | INCLUDE #include "dbinc/btree.h" |
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| 28 | INCLUDE #include "dbinc/log.h" |
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| 29 | INCLUDE #include "dbinc/rep.h" |
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| 30 | INCLUDE #include "dbinc/txn.h" |
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| 31 | INCLUDE |
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| 32 | |
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| 33 | /* |
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| 34 | * NOTE: pg_alloc and pg_free have been moved to db.src, where they belong. |
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| 35 | */ |
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| 36 | |
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| 37 | /* |
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| 38 | * BTREE-split: used to log a page split. |
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| 39 | * |
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| 40 | * left: the page number for the low-order contents. |
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| 41 | * llsn: the left page's original LSN. |
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| 42 | * right: the page number for the high-order contents. |
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| 43 | * rlsn: the right page's original LSN. |
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| 44 | * indx: the number of entries that went to the left page. |
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| 45 | * npgno: the next page number |
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| 46 | * nlsn: the next page's original LSN (or 0 if no next page). |
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| 47 | * root_pgno: the root page number |
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| 48 | * pg: the split page's contents before the split. |
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| 49 | * opflags: SPL_NRECS: if splitting a tree that maintains a record count. |
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| 50 | */ |
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| 51 | BEGIN split 62 |
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| 52 | DB fileid int32_t ld |
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| 53 | WRLOCK left db_pgno_t lu |
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| 54 | POINTER llsn DB_LSN * lu |
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| 55 | WRLOCK right db_pgno_t lu |
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| 56 | POINTER rlsn DB_LSN * lu |
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| 57 | ARG indx u_int32_t lu |
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| 58 | ARG npgno db_pgno_t lu |
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| 59 | POINTER nlsn DB_LSN * lu |
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| 60 | WRLOCKNZ root_pgno db_pgno_t lu |
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| 61 | PGDBT pg DBT s |
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| 62 | ARG opflags u_int32_t lu |
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| 63 | END |
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| 64 | |
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| 65 | /* |
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| 66 | * BTREE-rsplit: used to log a reverse-split |
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| 67 | * |
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| 68 | * pgno: the page number of the page copied over the root. |
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| 69 | * pgdbt: the page being copied on the root page. |
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| 70 | * root_pgno: the root page number. |
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| 71 | * nrec: the tree's record count. |
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| 72 | * rootent: last entry on the root page. |
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| 73 | * rootlsn: the root page's original lsn. |
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| 74 | */ |
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| 75 | BEGIN rsplit 63 |
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| 76 | DB fileid int32_t ld |
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| 77 | WRLOCK pgno db_pgno_t lu |
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| 78 | PGDBT pgdbt DBT s |
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| 79 | WRLOCK root_pgno db_pgno_t lu |
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| 80 | ARG nrec db_pgno_t lu |
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| 81 | DBT rootent DBT s |
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| 82 | POINTER rootlsn DB_LSN * lu |
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| 83 | END |
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| 84 | |
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| 85 | /* |
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| 86 | * BTREE-adj: used to log the adjustment of an index. |
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| 87 | * |
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| 88 | * pgno: the page modified. |
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| 89 | * lsn: the page's original lsn. |
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| 90 | * indx: the index adjusted. |
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| 91 | * indx_copy: the index to copy if inserting. |
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| 92 | * is_insert: 0 if a delete, 1 if an insert. |
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| 93 | */ |
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| 94 | BEGIN adj 55 |
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| 95 | DB fileid int32_t ld |
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| 96 | WRLOCK pgno db_pgno_t lu |
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| 97 | POINTER lsn DB_LSN * lu |
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| 98 | ARG indx u_int32_t lu |
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| 99 | ARG indx_copy u_int32_t lu |
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| 100 | ARG is_insert u_int32_t lu |
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| 101 | END |
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| 102 | |
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| 103 | /* |
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| 104 | * BTREE-cadjust: used to adjust the count change in an internal page. |
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| 105 | * |
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| 106 | * pgno: the page modified. |
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| 107 | * lsn: the page's original lsn. |
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| 108 | * indx: the index to be adjusted. |
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| 109 | * adjust: the signed adjustment. |
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| 110 | * opflags: CAD_UPDATEROOT: if root page count was adjusted. |
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| 111 | */ |
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| 112 | BEGIN cadjust 56 |
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| 113 | DB fileid int32_t ld |
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| 114 | WRLOCK pgno db_pgno_t lu |
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| 115 | POINTER lsn DB_LSN * lu |
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| 116 | ARG indx u_int32_t lu |
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| 117 | ARG adjust int32_t ld |
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| 118 | ARG opflags u_int32_t lu |
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| 119 | END |
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| 120 | |
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| 121 | /* |
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| 122 | * BTREE-cdel: used to log the intent-to-delete of a cursor record. |
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| 123 | * |
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| 124 | * pgno: the page modified. |
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| 125 | * lsn: the page's original lsn. |
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| 126 | * indx: the index to be deleted. |
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| 127 | */ |
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| 128 | BEGIN cdel 57 |
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| 129 | DB fileid int32_t ld |
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| 130 | WRLOCK pgno db_pgno_t lu |
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| 131 | POINTER lsn DB_LSN * lu |
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| 132 | ARG indx u_int32_t lu |
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| 133 | END |
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| 134 | |
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| 135 | /* |
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| 136 | * BTREE-repl: used to log the replacement of an item. |
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| 137 | * |
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| 138 | * pgno: the page modified. |
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| 139 | * lsn: the page's original lsn. |
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| 140 | * orig: the original data. |
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| 141 | * new: the replacement data. |
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| 142 | * duplicate: the prefix of the replacement that matches the original. |
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| 143 | */ |
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| 144 | BEGIN repl 58 |
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| 145 | DB fileid int32_t ld |
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| 146 | WRLOCK pgno db_pgno_t lu |
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| 147 | POINTER lsn DB_LSN * lu |
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| 148 | ARG indx u_int32_t lu |
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| 149 | ARG isdeleted u_int32_t lu |
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| 150 | DBT orig DBT s |
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| 151 | DBT repl DBT s |
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| 152 | ARG prefix u_int32_t lu |
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| 153 | ARG suffix u_int32_t lu |
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| 154 | END |
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| 155 | |
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| 156 | /* |
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| 157 | * BTREE-root: log the assignment of a root btree page. |
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| 158 | */ |
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| 159 | BEGIN root 59 |
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| 160 | DB fileid int32_t ld |
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| 161 | WRLOCK meta_pgno db_pgno_t lu |
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| 162 | WRLOCK root_pgno db_pgno_t lu |
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| 163 | POINTER meta_lsn DB_LSN * lu |
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| 164 | END |
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| 165 | |
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| 166 | /* |
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| 167 | * BTREE-curadj: undo cursor adjustments on txn abort. |
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| 168 | * Should only be processed during DB_TXN_ABORT. |
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| 169 | * NOTE: the first_indx field gets used to hold |
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| 170 | * signed index adjustment in one case. |
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| 171 | * care should be taken if its size is changed. |
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| 172 | */ |
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| 173 | BEGIN curadj 64 |
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| 174 | /* Fileid of db affected. */ |
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| 175 | DB fileid int32_t ld |
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| 176 | /* Which adjustment. */ |
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| 177 | ARG mode db_ca_mode ld |
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| 178 | /* Page entry is from. */ |
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| 179 | ARG from_pgno db_pgno_t lu |
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| 180 | /* Page entry went to. */ |
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| 181 | ARG to_pgno db_pgno_t lu |
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| 182 | /* Left page of root split. */ |
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| 183 | ARG left_pgno db_pgno_t lu |
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| 184 | /* First index of dup set. Also used as adjustment. */ |
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| 185 | ARG first_indx u_int32_t lu |
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| 186 | /* Index entry is from. */ |
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| 187 | ARG from_indx u_int32_t lu |
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| 188 | /* Index where entry went. */ |
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| 189 | ARG to_indx u_int32_t lu |
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| 190 | END |
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| 191 | |
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| 192 | /* |
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| 193 | * BTREE-rcuradj: undo cursor adjustments on txn abort in |
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| 194 | * renumbering recno trees. |
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| 195 | * Should only be processed during DB_TXN_ABORT. |
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| 196 | */ |
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| 197 | BEGIN rcuradj 65 |
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| 198 | /* Fileid of db affected. */ |
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| 199 | DB fileid int32_t ld |
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| 200 | /* Which adjustment. */ |
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| 201 | ARG mode ca_recno_arg ld |
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| 202 | /* Root page number. */ |
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| 203 | ARG root db_pgno_t ld |
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| 204 | /* Recno of the adjustment. */ |
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| 205 | ARG recno db_recno_t ld |
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| 206 | /* Order number of the adjustment. */ |
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| 207 | ARG order u_int32_t ld |
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| 208 | END |
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