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2c874db2dd
* db2/btree/bt_cursor.c: Likewise. * db2/common/db_region.db_c: Likewise. * db2/common/db_salloc.db_c: Likewise. * db2/db/db.c: Likewise. * db2/db/db_rec.c: Likewise. * db2/hash/hash.c: Likewise. * db2/hash/hash_page.c: Likewise. * db2/hash/hash_rec.c: Likewise. * db2/log/log_findckp.c: Likewise. * db2/log/log_get.c: Likewise. * db2/log/log_put.c: Likewise. * db2/mp/mp_fget.c: Likewise. * db2/mp/mp_fput.c: Likewise. * db2/mp/mp_region.c: Likewise.
644 lines
15 KiB
C
644 lines
15 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996, 1997, 1998
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* Sleepycat Software. All rights reserved.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "@(#)db_rec.c 10.16 (Sleepycat) 4/28/98";
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#endif /* not lint */
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <string.h>
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#endif
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#include "db_int.h"
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#include "shqueue.h"
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#include "db_page.h"
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#include "log.h"
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#include "hash.h"
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#include "btree.h"
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/*
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* PUBLIC: int __db_addrem_recover
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* PUBLIC: __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
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*
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* This log message is generated whenever we add or remove a duplicate
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* to/from a duplicate page. On recover, we just do the opposite.
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*/
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int
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__db_addrem_recover(logp, dbtp, lsnp, redo, info)
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DB_LOG *logp;
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DBT *dbtp;
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DB_LSN *lsnp;
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int redo;
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void *info;
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{
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__db_addrem_args *argp;
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DB *file_dbp, *mdbp;
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DB_MPOOLFILE *mpf;
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PAGE *pagep;
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u_int32_t change;
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int cmp_n, cmp_p, ret;
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REC_PRINT(__db_addrem_print);
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REC_INTRO(__db_addrem_read);
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if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
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if (!redo) {
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/*
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* We are undoing and the page doesn't exist. That
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* is equivalent to having a pagelsn of 0, so we
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* would not have to undo anything. In this case,
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* don't bother creating a page.
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*/
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*lsnp = argp->prev_lsn;
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ret = 0;
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goto out;
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} else
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if ((ret = memp_fget(mpf,
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&argp->pgno, DB_MPOOL_CREATE, &pagep)) != 0)
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goto out;
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}
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cmp_n = log_compare(lsnp, &LSN(pagep));
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cmp_p = log_compare(&LSN(pagep), &argp->pagelsn);
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change = 0;
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if ((cmp_p == 0 && redo && argp->opcode == DB_ADD_DUP) ||
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(cmp_n == 0 && !redo && argp->opcode == DB_REM_DUP)) {
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/* Need to redo an add, or undo a delete. */
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if ((ret = __db_pitem(file_dbp, pagep, argp->indx, argp->nbytes,
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argp->hdr.size == 0 ? NULL : &argp->hdr,
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argp->dbt.size == 0 ? NULL : &argp->dbt)) != 0)
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goto out;
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change = DB_MPOOL_DIRTY;
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} else if ((cmp_n == 0 && !redo && argp->opcode == DB_ADD_DUP) ||
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(cmp_p == 0 && redo && argp->opcode == DB_REM_DUP)) {
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/* Need to undo an add, or redo a delete. */
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if ((ret = __db_ditem(file_dbp,
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pagep, argp->indx, argp->nbytes)) != 0)
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goto out;
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change = DB_MPOOL_DIRTY;
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}
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if (change) {
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if (redo)
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LSN(pagep) = *lsnp;
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else
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LSN(pagep) = argp->pagelsn;
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}
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if ((ret = memp_fput(mpf, pagep, change)) == 0)
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*lsnp = argp->prev_lsn;
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out: REC_CLOSE;
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}
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/*
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* PUBLIC: int __db_split_recover __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
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*/
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int
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__db_split_recover(logp, dbtp, lsnp, redo, info)
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DB_LOG *logp;
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DBT *dbtp;
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DB_LSN *lsnp;
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int redo;
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void *info;
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{
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__db_split_args *argp;
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DB *file_dbp, *mdbp;
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DB_MPOOLFILE *mpf;
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PAGE *pagep;
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int change, cmp_n, cmp_p, ret;
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REC_PRINT(__db_split_print);
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REC_INTRO(__db_split_read);
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if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
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if (!redo) {
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/*
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* We are undoing and the page doesn't exist. That
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* is equivalent to having a pagelsn of 0, so we
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* would not have to undo anything. In this case,
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* don't bother creating a page.
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*/
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*lsnp = argp->prev_lsn;
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ret = 0;
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goto out;
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} else
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if ((ret = memp_fget(mpf,
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&argp->pgno, DB_MPOOL_CREATE, &pagep)) != 0)
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goto out;
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}
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/*
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* There are two types of log messages here, one for the old page
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* and one for the new pages created. The original image in the
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* SPLITOLD record is used for undo. The image in the SPLITNEW
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* is used for redo. We should never have a case where there is
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* a redo operation and the SPLITOLD record is on disk, but not
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* the SPLITNEW record. Therefore, we only redo NEW messages
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* and only undo OLD messages.
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*/
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change = 0;
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cmp_n = log_compare(lsnp, &LSN(pagep));
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cmp_p = log_compare(&LSN(pagep), &argp->pagelsn);
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if (cmp_p == 0 && redo) {
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if (argp->opcode == DB_SPLITNEW) {
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/* Need to redo the split described. */
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memcpy(pagep,
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argp->pageimage.data, argp->pageimage.size);
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}
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LSN(pagep) = *lsnp;
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change = DB_MPOOL_DIRTY;
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} else if (cmp_n == 0 && !redo) {
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if (argp->opcode == DB_SPLITOLD) {
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/* Put back the old image. */
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memcpy(pagep,
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argp->pageimage.data, argp->pageimage.size);
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}
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LSN(pagep) = argp->pagelsn;
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change = DB_MPOOL_DIRTY;
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}
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if ((ret = memp_fput(mpf, pagep, change)) == 0)
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*lsnp = argp->prev_lsn;
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out: REC_CLOSE;
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}
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/*
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* PUBLIC: int __db_big_recover __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
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*/
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int
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__db_big_recover(logp, dbtp, lsnp, redo, info)
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DB_LOG *logp;
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DBT *dbtp;
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DB_LSN *lsnp;
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int redo;
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void *info;
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{
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__db_big_args *argp;
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DB *file_dbp, *mdbp;
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DB_MPOOLFILE *mpf;
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PAGE *pagep;
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u_int32_t change;
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int cmp_n, cmp_p, ret;
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REC_PRINT(__db_big_print);
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REC_INTRO(__db_big_read);
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if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
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if (!redo) {
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/*
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* We are undoing and the page doesn't exist. That
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* is equivalent to having a pagelsn of 0, so we
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* would not have to undo anything. In this case,
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* don't bother creating a page.
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*/
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ret = 0;
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goto ppage;
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} else
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if ((ret = memp_fget(mpf,
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&argp->pgno, DB_MPOOL_CREATE, &pagep)) != 0)
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goto out;
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}
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/*
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* There are three pages we need to check. The one on which we are
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* adding data, the previous one whose next_pointer may have
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* been updated, and the next one whose prev_pointer may have
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* been updated.
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*/
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cmp_n = log_compare(lsnp, &LSN(pagep));
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cmp_p = log_compare(&LSN(pagep), &argp->pagelsn);
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change = 0;
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if ((cmp_p == 0 && redo && argp->opcode == DB_ADD_BIG) ||
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(cmp_n == 0 && !redo && argp->opcode == DB_REM_BIG)) {
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/* We are either redo-ing an add, or undoing a delete. */
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P_INIT(pagep, file_dbp->pgsize, argp->pgno, argp->prev_pgno,
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argp->next_pgno, 0, P_OVERFLOW);
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OV_LEN(pagep) = argp->dbt.size;
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OV_REF(pagep) = 1;
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memcpy((u_int8_t *)pagep + P_OVERHEAD, argp->dbt.data,
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argp->dbt.size);
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PREV_PGNO(pagep) = argp->prev_pgno;
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change = DB_MPOOL_DIRTY;
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} else if ((cmp_n == 0 && !redo && argp->opcode == DB_ADD_BIG) ||
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(cmp_p == 0 && redo && argp->opcode == DB_REM_BIG)) {
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/*
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* We are either undo-ing an add or redo-ing a delete.
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* The page is about to be reclaimed in either case, so
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* there really isn't anything to do here.
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*/
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change = DB_MPOOL_DIRTY;
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}
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if (change)
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LSN(pagep) = redo ? *lsnp : argp->pagelsn;
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if ((ret = memp_fput(mpf, pagep, change)) != 0)
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goto out;
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/* Now check the previous page. */
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ppage: if (argp->prev_pgno != PGNO_INVALID) {
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change = 0;
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if ((ret = memp_fget(mpf, &argp->prev_pgno, 0, &pagep)) != 0) {
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if (!redo) {
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/*
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* We are undoing and the page doesn't exist.
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* That is equivalent to having a pagelsn of 0,
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* so we would not have to undo anything. In
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* this case, don't bother creating a page.
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*/
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*lsnp = argp->prev_lsn;
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ret = 0;
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goto npage;
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} else
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if ((ret = memp_fget(mpf, &argp->prev_pgno,
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DB_MPOOL_CREATE, &pagep)) != 0)
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goto out;
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}
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cmp_n = log_compare(lsnp, &LSN(pagep));
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cmp_p = log_compare(&LSN(pagep), &argp->prevlsn);
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if ((cmp_p == 0 && redo && argp->opcode == DB_ADD_BIG) ||
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(cmp_n == 0 && !redo && argp->opcode == DB_REM_BIG)) {
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/* Redo add, undo delete. */
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NEXT_PGNO(pagep) = argp->pgno;
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change = DB_MPOOL_DIRTY;
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} else if ((cmp_n == 0 &&
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!redo && argp->opcode == DB_ADD_BIG) ||
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(cmp_p == 0 && redo && argp->opcode == DB_REM_BIG)) {
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/* Redo delete, undo add. */
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NEXT_PGNO(pagep) = argp->next_pgno;
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change = DB_MPOOL_DIRTY;
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}
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if (change)
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LSN(pagep) = redo ? *lsnp : argp->prevlsn;
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if ((ret = memp_fput(mpf, pagep, change)) != 0)
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goto out;
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}
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/* Now check the next page. Can only be set on a delete. */
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npage: if (argp->next_pgno != PGNO_INVALID) {
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change = 0;
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if ((ret = memp_fget(mpf, &argp->next_pgno, 0, &pagep)) != 0) {
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if (!redo) {
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/*
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* We are undoing and the page doesn't exist.
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* That is equivalent to having a pagelsn of 0,
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* so we would not have to undo anything. In
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* this case, don't bother creating a page.
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*/
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*lsnp = argp->prev_lsn;
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ret = 0;
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goto out;
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} else
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if ((ret = memp_fget(mpf, &argp->next_pgno,
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DB_MPOOL_CREATE, &pagep)) != 0)
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goto out;
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}
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cmp_n = log_compare(lsnp, &LSN(pagep));
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cmp_p = log_compare(&LSN(pagep), &argp->nextlsn);
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if (cmp_p == 0 && redo) {
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PREV_PGNO(pagep) = PGNO_INVALID;
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change = DB_MPOOL_DIRTY;
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} else if (cmp_n == 0 && !redo) {
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PREV_PGNO(pagep) = argp->pgno;
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change = DB_MPOOL_DIRTY;
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}
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if (change)
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LSN(pagep) = redo ? *lsnp : argp->nextlsn;
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if ((ret = memp_fput(mpf, pagep, change)) != 0)
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goto out;
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}
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*lsnp = argp->prev_lsn;
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out: REC_CLOSE;
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}
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/*
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* __db_ovref_recover --
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* Recovery function for __db_ovref().
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*
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* PUBLIC: int __db_ovref_recover __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
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*/
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int
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__db_ovref_recover(logp, dbtp, lsnp, redo, info)
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DB_LOG *logp;
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DBT *dbtp;
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DB_LSN *lsnp;
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int redo;
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void *info;
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{
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__db_ovref_args *argp;
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DB *file_dbp, *mdbp;
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DB_MPOOLFILE *mpf;
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PAGE *pagep;
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int modified, ret;
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REC_PRINT(__db_ovref_print);
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REC_INTRO(__db_ovref_read);
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if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
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(void)__db_pgerr(file_dbp, argp->pgno);
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goto out;
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}
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modified = 0;
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if (log_compare(&LSN(pagep), &argp->lsn) == 0 && redo) {
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/* Need to redo update described. */
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OV_REF(pagep) += argp->adjust;
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pagep->lsn = *lsnp;
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modified = 1;
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} else if (log_compare(lsnp, &LSN(pagep)) == 0 && !redo) {
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/* Need to undo update described. */
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OV_REF(pagep) -= argp->adjust;
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pagep->lsn = argp->lsn;
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modified = 1;
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}
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if ((ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) == 0)
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*lsnp = argp->prev_lsn;
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out: REC_CLOSE;
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}
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/*
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* __db_relink_recover --
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* Recovery function for relink.
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*
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* PUBLIC: int __db_relink_recover
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* PUBLIC: __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
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*/
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int
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__db_relink_recover(logp, dbtp, lsnp, redo, info)
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DB_LOG *logp;
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DBT *dbtp;
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DB_LSN *lsnp;
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int redo;
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void *info;
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{
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__db_relink_args *argp;
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DB *file_dbp, *mdbp;
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DB_MPOOLFILE *mpf;
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PAGE *pagep;
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int modified, ret;
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REC_PRINT(__db_relink_print);
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REC_INTRO(__db_relink_read);
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/*
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* There are three pages we need to check -- the page, and the
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* previous and next pages, if they existed.
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*/
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if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
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if (redo) {
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(void)__db_pgerr(file_dbp, argp->pgno);
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goto out;
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}
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goto next;
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}
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modified = 0;
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if (log_compare(&LSN(pagep), &argp->lsn) == 0 && redo) {
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/* Redo the relink. */
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pagep->lsn = *lsnp;
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modified = 1;
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} else if (log_compare(lsnp, &LSN(pagep)) == 0 && !redo) {
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/* Undo the relink. */
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pagep->next_pgno = argp->next;
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pagep->prev_pgno = argp->prev;
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pagep->lsn = argp->lsn;
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modified = 1;
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}
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if ((ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0) {
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(void)__db_panic(file_dbp);
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goto out;
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}
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next: if ((ret = memp_fget(mpf, &argp->next, 0, &pagep)) != 0) {
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if (redo) {
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(void)__db_pgerr(file_dbp, argp->next);
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goto out;
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}
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goto prev;
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}
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modified = 0;
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if (log_compare(&LSN(pagep), &argp->lsn_next) == 0 && redo) {
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/* Redo the relink. */
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pagep->prev_pgno = argp->prev;
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pagep->lsn = *lsnp;
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modified = 1;
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} else if (log_compare(lsnp, &LSN(pagep)) == 0 && !redo) {
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/* Undo the relink. */
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pagep->prev_pgno = argp->pgno;
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pagep->lsn = argp->lsn_next;
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modified = 1;
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}
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if ((ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0) {
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(void)__db_panic(file_dbp);
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goto out;
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}
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prev: if ((ret = memp_fget(mpf, &argp->prev, 0, &pagep)) != 0) {
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if (redo) {
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(void)__db_pgerr(file_dbp, argp->prev);
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goto out;
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}
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|
goto done;
|
|
}
|
|
modified = 0;
|
|
if (log_compare(&LSN(pagep), &argp->lsn_prev) == 0 && redo) {
|
|
/* Redo the relink. */
|
|
pagep->next_pgno = argp->next;
|
|
|
|
pagep->lsn = *lsnp;
|
|
modified = 1;
|
|
} else if (log_compare(lsnp, &LSN(pagep)) == 0 && !redo) {
|
|
/* Undo the relink. */
|
|
pagep->next_pgno = argp->pgno;
|
|
|
|
pagep->lsn = argp->lsn_prev;
|
|
modified = 1;
|
|
}
|
|
if ((ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0) {
|
|
(void) __db_panic(file_dbp);
|
|
goto out;
|
|
}
|
|
|
|
done: *lsnp = argp->prev_lsn;
|
|
ret = 0;
|
|
|
|
out: REC_CLOSE;
|
|
}
|
|
|
|
/*
|
|
* PUBLIC: int __db_addpage_recover
|
|
* PUBLIC: __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
|
|
*/
|
|
int
|
|
__db_addpage_recover(logp, dbtp, lsnp, redo, info)
|
|
DB_LOG *logp;
|
|
DBT *dbtp;
|
|
DB_LSN *lsnp;
|
|
int redo;
|
|
void *info;
|
|
{
|
|
__db_addpage_args *argp;
|
|
DB *file_dbp, *mdbp;
|
|
DB_MPOOLFILE *mpf;
|
|
PAGE *pagep;
|
|
u_int32_t change;
|
|
int cmp_n, cmp_p, ret;
|
|
|
|
REC_PRINT(__db_addpage_print);
|
|
REC_INTRO(__db_addpage_read);
|
|
|
|
/*
|
|
* We need to check two pages: the old one and the new one onto
|
|
* which we're going to add duplicates. Do the old one first.
|
|
*/
|
|
if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0)
|
|
goto out;
|
|
|
|
change = 0;
|
|
cmp_n = log_compare(lsnp, &LSN(pagep));
|
|
cmp_p = log_compare(&LSN(pagep), &argp->lsn);
|
|
if (cmp_p == 0 && redo) {
|
|
NEXT_PGNO(pagep) = argp->nextpgno;
|
|
|
|
LSN(pagep) = *lsnp;
|
|
change = DB_MPOOL_DIRTY;
|
|
} else if (cmp_n == 0 && !redo) {
|
|
NEXT_PGNO(pagep) = PGNO_INVALID;
|
|
|
|
LSN(pagep) = argp->lsn;
|
|
change = DB_MPOOL_DIRTY;
|
|
}
|
|
if ((ret = memp_fput(mpf, pagep, change)) != 0)
|
|
goto out;
|
|
|
|
if ((ret = memp_fget(mpf, &argp->nextpgno, 0, &pagep)) != 0) {
|
|
if (!redo) {
|
|
/*
|
|
* We are undoing and the page doesn't exist. That
|
|
* is equivalent to having a pagelsn of 0, so we
|
|
* would not have to undo anything. In this case,
|
|
* don't bother creating a page.
|
|
*/
|
|
ret = 0;
|
|
goto out;
|
|
} else
|
|
if ((ret = memp_fget(mpf,
|
|
&argp->nextpgno, DB_MPOOL_CREATE, &pagep)) != 0)
|
|
goto out;
|
|
}
|
|
|
|
change = 0;
|
|
cmp_n = log_compare(lsnp, &LSN(pagep));
|
|
cmp_p = log_compare(&LSN(pagep), &argp->nextlsn);
|
|
if (cmp_p == 0 && redo) {
|
|
PREV_PGNO(pagep) = argp->pgno;
|
|
|
|
LSN(pagep) = *lsnp;
|
|
change = DB_MPOOL_DIRTY;
|
|
} else if (cmp_n == 0 && !redo) {
|
|
PREV_PGNO(pagep) = PGNO_INVALID;
|
|
|
|
LSN(pagep) = argp->nextlsn;
|
|
change = DB_MPOOL_DIRTY;
|
|
}
|
|
ret = memp_fput(mpf, pagep, change);
|
|
|
|
out: if (ret == 0)
|
|
*lsnp = argp->prev_lsn;
|
|
REC_CLOSE;
|
|
}
|
|
|
|
/*
|
|
* __db_debug_recover --
|
|
* Recovery function for debug.
|
|
*
|
|
* PUBLIC: int __db_debug_recover __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
|
|
*/
|
|
int
|
|
__db_debug_recover(logp, dbtp, lsnp, redo, info)
|
|
DB_LOG *logp;
|
|
DBT *dbtp;
|
|
DB_LSN *lsnp;
|
|
int redo;
|
|
void *info;
|
|
{
|
|
__db_debug_args *argp;
|
|
int ret;
|
|
|
|
COMPQUIET(redo, 0);
|
|
COMPQUIET(logp, NULL);
|
|
|
|
REC_PRINT(__db_debug_print);
|
|
REC_NOOP_INTRO(__db_debug_read);
|
|
|
|
*lsnp = argp->prev_lsn;
|
|
ret = 0;
|
|
|
|
REC_NOOP_CLOSE;
|
|
}
|
|
|
|
/*
|
|
* __db_noop_recover --
|
|
* Recovery function for noop.
|
|
*
|
|
* PUBLIC: int __db_noop_recover __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
|
|
*/
|
|
int
|
|
__db_noop_recover(logp, dbtp, lsnp, redo, info)
|
|
DB_LOG *logp;
|
|
DBT *dbtp;
|
|
DB_LSN *lsnp;
|
|
int redo;
|
|
void *info;
|
|
{
|
|
__db_noop_args *argp;
|
|
DB *file_dbp, *mdbp;
|
|
DB_MPOOLFILE *mpf;
|
|
PAGE *pagep;
|
|
u_int32_t change;
|
|
int cmp_n, cmp_p, ret;
|
|
|
|
REC_PRINT(__db_noop_print);
|
|
REC_INTRO(__db_noop_read);
|
|
|
|
if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0)
|
|
goto out;
|
|
|
|
cmp_n = log_compare(lsnp, &LSN(pagep));
|
|
cmp_p = log_compare(&LSN(pagep), &argp->prevlsn);
|
|
change = 0;
|
|
if (cmp_p == 0 && redo) {
|
|
LSN(pagep) = *lsnp;
|
|
change = DB_MPOOL_DIRTY;
|
|
} else if (cmp_n == 0 && !redo) {
|
|
LSN(pagep) = argp->prevlsn;
|
|
change = DB_MPOOL_DIRTY;
|
|
}
|
|
*lsnp = argp->prev_lsn;
|
|
ret = memp_fput(mpf, pagep, change);
|
|
|
|
out: REC_CLOSE;
|
|
}
|