/*- * See the file LICENSE for redistribution information. * * Copyright (c) 1996-2002 * Sleepycat Software. All rights reserved. * * $Id: hash.src,v 1.1.1.1 2003/02/15 04:56:06 zarzycki Exp $ */ /* * Copyright (c) 1995, 1996 * Margo Seltzer. All rights reserved. */ /* * Copyright (c) 1995, 1996 * The President and Fellows of Harvard University. All rights reserved. * * This code is derived from software contributed to Berkeley by * Margo Seltzer. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ PREFIX __ham DBPRIVATE INCLUDE #include "db_config.h" INCLUDE INCLUDE #ifndef NO_SYSTEM_INCLUDES INCLUDE #include <sys/types.h> INCLUDE INCLUDE #include <ctype.h> INCLUDE #include <string.h> INCLUDE #endif INCLUDE INCLUDE #include "db_int.h" INCLUDE #include "dbinc/crypto.h" INCLUDE #include "dbinc/db_page.h" INCLUDE #include "dbinc/db_dispatch.h" INCLUDE #include "dbinc/db_am.h" INCLUDE #include "dbinc/hash.h" INCLUDE #include "dbinc/rep.h" INCLUDE #include "dbinc/log.h" INCLUDE #include "dbinc/txn.h" INCLUDE /* * HASH-insdel: used for hash to insert/delete a pair of entries onto a master * page. The pair might be regular key/data pairs or they might be the * structures that refer to off page items, duplicates or offpage duplicates. * opcode - PUTPAIR/DELPAIR + big masks * fileid - identifies the file referenced * pgno - page within file * ndx - index on the page of the item being added (item index) * pagelsn - lsn on the page before the update * key - the key being inserted * data - the data being inserted */ BEGIN insdel 21 ARG opcode u_int32_t lu DB fileid int32_t ld WRLOCK pgno db_pgno_t lu ARG ndx u_int32_t lu POINTER pagelsn DB_LSN * lu DBT key DBT s DBT data DBT s END /* * Used to add and remove overflow pages. * prev_pgno is the previous page that is going to get modified to * point to this one. If this is the first page in a chain * then prev_pgno should be PGNO_INVALID. * new_pgno is the page being allocated. * next_pgno is the page that follows this one. On allocation, * this should be PGNO_INVALID. For deletes, it may exist. * pagelsn is the old lsn on the page. */ BEGIN newpage 22 ARG opcode u_int32_t lu DB fileid int32_t ld WRLOCKNZ prev_pgno db_pgno_t lu POINTER prevlsn DB_LSN * lu WRLOCKNZ new_pgno db_pgno_t lu POINTER pagelsn DB_LSN * lu WRLOCKNZ next_pgno db_pgno_t lu POINTER nextlsn DB_LSN * lu END /* * Splitting requires two types of log messages. The second logs the * data on the original page. To redo the split, we have to visit the * new page (pages) and add the items back on the page if they are not * yet there. */ BEGIN splitdata 24 DB fileid int32_t ld ARG opcode u_int32_t lu WRLOCK pgno db_pgno_t lu PGDBT pageimage DBT s POINTER pagelsn DB_LSN * lu END /* * HASH-replace: is used for hash to handle partial puts that only * affect a single master page. * fileid - identifies the file referenced * pgno - page within file * ndx - index on the page of the item being modified (item index) * pagelsn - lsn on the page before the update * off - offset in the old item where the new item is going. * olditem - DBT that describes the part of the item being replaced. * newitem - DBT of the new item. * makedup - this was a replacement that made an item a duplicate. */ BEGIN replace 25 DB fileid int32_t ld WRLOCK pgno db_pgno_t lu ARG ndx u_int32_t lu POINTER pagelsn DB_LSN * lu ARG off int32_t ld DBT olditem DBT s DBT newitem DBT s ARG makedup u_int32_t lu END /* * Used when we empty the first page in a bucket and there are pages after * it. The page after it gets copied into the bucket page (since bucket * pages have to be in fixed locations). * pgno: the bucket page * pagelsn: the old LSN on the bucket page * next_pgno: the page number of the next page * nnext_pgno: page after next_pgno (may need to change its prev) * nnextlsn: the LSN of nnext_pgno. */ BEGIN copypage 28 DB fileid int32_t ld WRLOCK pgno db_pgno_t lu POINTER pagelsn DB_LSN * lu WRLOCK next_pgno db_pgno_t lu POINTER nextlsn DB_LSN * lu WRLOCKNZ nnext_pgno db_pgno_t lu POINTER nnextlsn DB_LSN * lu PGDBT page DBT s END /* * This record logs the meta-data aspects of a split operation. It has enough * information so that we can record both an individual page allocation as well * as a group allocation which we do because in sub databases, the pages in * a hash doubling, must be contiguous. If we do a group allocation, the * number of pages allocated is bucket + 1, pgno is the page number of the * first newly allocated bucket. * * bucket: Old maximum bucket number. * mmpgno: Master meta-data page number (0 if same as mpgno). * mmetalsn: Lsn of the master meta-data page. * mpgno: Meta-data page number. * metalsn: Lsn of the meta-data page. * pgno: Page allocated to bucket + 1 (first newly allocated page) * pagelsn: Lsn of either the first page allocated (if newalloc == 0) or * the last page allocated (if newalloc == 1). * newalloc: 1 indicates that this record did the actual allocation; * 0 indicates that the pages were already allocated from a * previous (failed) allocation. */ BEGIN metagroup 29 DB fileid int32_t ld ARG bucket u_int32_t lu WRLOCK mmpgno db_pgno_t lu POINTER mmetalsn DB_LSN * lu WRLOCKNZ mpgno db_pgno_t lu POINTER metalsn DB_LSN * lu WRLOCK pgno db_pgno_t lu POINTER pagelsn DB_LSN * lu ARG newalloc u_int32_t lu END /* * groupalloc * * This is used in conjunction with MPOOL_NEW_GROUP when we are creating * a new database to make sure that we recreate or reclaim free pages * when we allocate a chunk of contiguous ones during database creation. * * pgno: meta-data page number * metalsn: meta-data lsn * start_pgno: starting page number * num: number of allocated pages */ BEGIN groupalloc 32 DB fileid int32_t ld POINTER meta_lsn DB_LSN * lu WRLOCK start_pgno db_pgno_t lu ARG num u_int32_t lu ARG free db_pgno_t lu END /* * Records for backing out cursor adjustment. * curadj - added or deleted a record or a dup * within a record. * pgno - page that was effected * indx - indx of recrod effected. * len - if a dup its length. * dup_off - if a dup its offset * add - 1 if add 0 if delete * is_dup - 1 if dup 0 otherwise. * order - order assigned to this deleted record or dup. * * chgpg - rmoved a page, move the records to a new page * mode - CHGPG page was deleted or records move to new page. * - SPLIT we split a bucket * - DUP we convered to off page duplicates. * old_pgno, new_pgno - old and new page numbers. * old_index, new_index - old and new index numbers, NDX_INVALID if * it effects all records on the page. * For three opcodes new in 3.3 (DB_HAM_DELFIRSTPG, DELMIDPG, * and DELLASTPG), we overload old_indx and new_indx to avoid * needing a new log record type: old_indx stores the only * indx of interest to these records, and new_indx stores the * order that's assigned to the lowest deleted record we're * moving. */ BEGIN curadj 33 DB fileid int32_t ld ARG pgno db_pgno_t lu ARG indx u_int32_t lu ARG len u_int32_t lu ARG dup_off u_int32_t lu ARG add int ld ARG is_dup int ld ARG order u_int32_t lu END BEGIN chgpg 34 DB fileid int32_t ld ARG mode db_ham_mode ld ARG old_pgno db_pgno_t lu ARG new_pgno db_pgno_t lu ARG old_indx u_int32_t lu ARG new_indx u_int32_t lu END