916 lines
23 KiB
C
916 lines
23 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
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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[] = "@(#)bt_rec.c 10.18 (Sleepycat) 12/15/97";
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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 <ctype.h>
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#include <errno.h>
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#include <stddef.h>
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#include <stdlib.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 "db_page.h"
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#include "shqueue.h"
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#include "hash.h"
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#include "btree.h"
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#include "log.h"
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#include "db_dispatch.h"
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#include "common_ext.h"
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/*
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* __bam_pg_alloc_recover --
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* Recovery function for pg_alloc.
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*
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* PUBLIC: int __bam_pg_alloc_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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__bam_pg_alloc_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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__bam_pg_alloc_args *argp;
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BTMETA *meta;
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DB_MPOOLFILE *mpf;
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PAGE *pagep;
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DB *file_dbp, *mdbp;
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db_pgno_t pgno;
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int cmp_n, cmp_p, created, modified, ret;
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REC_PRINT(__bam_pg_alloc_print);
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REC_INTRO(__bam_pg_alloc_read);
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/*
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* Fix up the allocated page. If we're redoing the operation, we have
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* to get the page (creating it if it doesn't exist), and update its
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* LSN. If we're undoing the operation, we have to reset the page's
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* LSN and put it on the free list.
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*
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* Fix up the metadata page. If we're redoing the operation, we have
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* to get the metadata page and update its LSN and its free pointer.
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* If we're undoing the operation and the page was ever created, we put
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* it on the freelist.
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*/
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pgno = PGNO_METADATA;
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if ((ret = memp_fget(mpf, &pgno, 0, &meta)) != 0) {
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/* The metadata page must always exist. */
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(void)__db_pgerr(file_dbp, pgno);
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goto out;
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}
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if ((ret = memp_fget(mpf, &argp->pgno, DB_MPOOL_CREATE, &pagep)) != 0) {
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/*
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* We specify creation and check for it later, because this
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* operation was supposed to create the page, and even in
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* the undo case it's going to get linked onto the freelist
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* which we're also fixing up.
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*/
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(void)__db_pgerr(file_dbp, argp->pgno);
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(void)memp_fput(mpf, meta, 0);
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goto out;
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}
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/* Fix up the allocated page. */
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created = IS_ZERO_LSN(LSN(pagep));
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modified = 0;
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cmp_n = log_compare(lsnp, &LSN(pagep));
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cmp_p = log_compare(&LSN(pagep), &argp->page_lsn);
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if ((created || cmp_p == 0) && redo) {
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/* Need to redo update described. */
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P_INIT(pagep, file_dbp->pgsize,
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argp->pgno, PGNO_INVALID, PGNO_INVALID, 0, argp->ptype);
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pagep->lsn = *lsnp;
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modified = 1;
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} else if ((created || cmp_n == 0) && !redo) {
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/* Need to undo update described. */
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P_INIT(pagep, file_dbp->pgsize,
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argp->pgno, PGNO_INVALID, meta->free, 0, P_INVALID);
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pagep->lsn = argp->page_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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(void)memp_fput(mpf, meta, 0);
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goto out;
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}
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/* Fix up the metadata page. */
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modified = 0;
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cmp_n = log_compare(lsnp, &LSN(meta));
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cmp_p = log_compare(&LSN(meta), &argp->meta_lsn);
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if (cmp_p == 0 && redo) {
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/* Need to redo update described. */
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meta->lsn = *lsnp;
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meta->free = argp->next;
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modified = 1;
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} else if (cmp_n == 0 && !redo) {
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/* Need to undo update described. */
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meta->lsn = argp->meta_lsn;
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meta->free = argp->pgno;
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modified = 1;
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}
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if ((ret = memp_fput(mpf, meta, 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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*lsnp = argp->prev_lsn;
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ret = 0;
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out: REC_CLOSE;
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}
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/*
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* __bam_pg_free_recover --
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* Recovery function for pg_free.
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*
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* PUBLIC: int __bam_pg_free_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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__bam_pg_free_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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__bam_pg_free_args *argp;
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BTMETA *meta;
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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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db_pgno_t pgno;
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int cmp_n, cmp_p, modified, ret;
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REC_PRINT(__bam_pg_free_print);
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REC_INTRO(__bam_pg_free_read);
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/*
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* Fix up the freed page. If we're redoing the operation we get the
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* page and explicitly discard its contents, then update its LSN. If
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* we're undoing the operation, we get the page and restore its header.
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*/
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if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
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/*
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* We don't automatically create the page. The only way the
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* page might not exist is if the alloc never happened, and
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* the only way the alloc might never have happened is if we
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* are undoing, in which case there's no reason to create the
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* page.
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*/
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if (!redo)
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goto done;
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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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cmp_n = log_compare(lsnp, &LSN(pagep));
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cmp_p = log_compare(&LSN(pagep), &LSN(argp->header.data));
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if (cmp_p == 0 && redo) {
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/* Need to redo update described. */
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P_INIT(pagep, file_dbp->pgsize,
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pagep->pgno, PGNO_INVALID, argp->next, 0, P_INVALID);
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pagep->lsn = *lsnp;
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modified = 1;
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} else if (cmp_n == 0 && !redo) {
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/* Need to undo update described. */
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memcpy(pagep, argp->header.data, argp->header.size);
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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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/*
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* Fix up the metadata page. If we're redoing or undoing the operation
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* we get the page and update its LSN and free pointer.
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*/
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pgno = PGNO_METADATA;
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if ((ret = memp_fget(mpf, &pgno, 0, &meta)) != 0) {
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/* The metadata page must always exist. */
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(void)__db_pgerr(file_dbp, pgno);
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goto out;
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}
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modified = 0;
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cmp_n = log_compare(lsnp, &LSN(meta));
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cmp_p = log_compare(&LSN(meta), &argp->meta_lsn);
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if (cmp_p == 0 && redo) {
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/* Need to redo update described. */
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meta->free = argp->pgno;
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meta->lsn = *lsnp;
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modified = 1;
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} else if (cmp_n == 0 && !redo) {
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/* Need to undo update described. */
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meta->free = argp->next;
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meta->lsn = argp->meta_lsn;
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modified = 1;
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}
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if ((ret = memp_fput(mpf, meta, 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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done: *lsnp = argp->prev_lsn;
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ret = 0;
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out: REC_CLOSE;
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}
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/*
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* __bam_split_recover --
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* Recovery function for split.
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*
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* PUBLIC: int __bam_split_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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__bam_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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__bam_split_args *argp;
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DB *file_dbp, *mdbp;
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DB_MPOOLFILE *mpf;
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PAGE *_lp, *lp, *np, *pp, *_rp, *rp, *sp;
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db_pgno_t pgno;
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int l_update, p_update, r_update, ret, rootsplit, t_ret;
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REC_PRINT(__bam_split_print);
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mpf = NULL;
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_lp = lp = np = pp = _rp = rp = NULL;
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REC_INTRO(__bam_split_read);
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/*
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* There are two kinds of splits that we have to recover from. The
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* first is a root-page split, where the root page is split from a
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* leaf page into an internal page and two new leaf pages are created.
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* The second is where a page is split into two pages, and a new key
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* is inserted into the parent page.
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*/
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sp = argp->pg.data;
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pgno = PGNO(sp);
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rootsplit = pgno == PGNO_ROOT;
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if (memp_fget(mpf, &argp->left, 0, &lp) != 0)
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lp = NULL;
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if (memp_fget(mpf, &argp->right, 0, &rp) != 0)
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rp = NULL;
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if (redo) {
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l_update = r_update = p_update = 0;
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/*
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* Decide if we need to resplit the page.
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*
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* If this is a root split, then the root has to exist, it's
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* the page we're splitting and it gets modified. If this is
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* not a root split, then the left page has to exist, for the
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* same reason.
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*/
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if (rootsplit) {
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if ((ret = memp_fget(mpf, &pgno, 0, &pp)) != 0) {
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(void)__db_pgerr(file_dbp, pgno);
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pp = NULL;
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goto out;
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}
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p_update =
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log_compare(&LSN(pp), &LSN(argp->pg.data)) == 0;
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} else
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if (lp == NULL) {
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(void)__db_pgerr(file_dbp, argp->left);
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goto out;
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}
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if (lp == NULL || log_compare(&LSN(lp), &argp->llsn) == 0)
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l_update = 1;
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if (rp == NULL || log_compare(&LSN(rp), &argp->rlsn) == 0)
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r_update = 1;
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if (!p_update && !l_update && !r_update)
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goto done;
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/* Allocate and initialize new left/right child pages. */
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if ((_lp = (PAGE *)__db_malloc(file_dbp->pgsize)) == NULL ||
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(_rp = (PAGE *)__db_malloc(file_dbp->pgsize)) == NULL) {
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ret = ENOMEM;
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__db_err(file_dbp->dbenv, "%s", strerror(ret));
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goto out;
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}
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if (rootsplit) {
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P_INIT(_lp, file_dbp->pgsize, argp->left,
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PGNO_INVALID,
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ISINTERNAL(sp) ? PGNO_INVALID : argp->right,
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LEVEL(sp), TYPE(sp));
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P_INIT(_rp, file_dbp->pgsize, argp->right,
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ISINTERNAL(sp) ? PGNO_INVALID : argp->left,
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PGNO_INVALID, LEVEL(sp), TYPE(sp));
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} else {
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P_INIT(_lp, file_dbp->pgsize, PGNO(sp),
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ISINTERNAL(sp) ? PGNO_INVALID : PREV_PGNO(sp),
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ISINTERNAL(sp) ? PGNO_INVALID : argp->right,
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LEVEL(sp), TYPE(sp));
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P_INIT(_rp, file_dbp->pgsize, argp->right,
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ISINTERNAL(sp) ? PGNO_INVALID : sp->pgno,
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ISINTERNAL(sp) ? PGNO_INVALID : NEXT_PGNO(sp),
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LEVEL(sp), TYPE(sp));
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}
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/* Split the page. */
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if ((ret = __bam_copy(file_dbp, sp, _lp, 0, argp->indx)) != 0 ||
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(ret = __bam_copy(file_dbp, sp, _rp, argp->indx,
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NUM_ENT(sp))) != 0)
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goto out;
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/* If the left child is wrong, update it. */
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if (lp == NULL && (ret =
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memp_fget(mpf, &argp->left, DB_MPOOL_CREATE, &lp)) != 0) {
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(void)__db_pgerr(file_dbp, argp->left);
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lp = NULL;
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goto out;
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}
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if (l_update) {
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memcpy(lp, _lp, file_dbp->pgsize);
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lp->lsn = *lsnp;
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if ((ret = memp_fput(mpf, lp, DB_MPOOL_DIRTY)) != 0)
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goto fatal;
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lp = NULL;
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}
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/* If the right child is wrong, update it. */
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if (rp == NULL && (ret = memp_fget(mpf,
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&argp->right, DB_MPOOL_CREATE, &rp)) != 0) {
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(void)__db_pgerr(file_dbp, argp->right);
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rp = NULL;
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goto out;
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}
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if (r_update) {
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memcpy(rp, _rp, file_dbp->pgsize);
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rp->lsn = *lsnp;
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if ((ret = memp_fput(mpf, rp, DB_MPOOL_DIRTY)) != 0)
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goto fatal;
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rp = NULL;
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}
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/*
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* If the parent page is wrong, update it. This is of interest
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* only if it was a root split, since root splits create parent
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* pages. All other splits modify a parent page, but those are
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* separately logged and recovered.
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*/
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if (rootsplit && p_update) {
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if (file_dbp->type == DB_BTREE)
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P_INIT(pp, file_dbp->pgsize,
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PGNO_ROOT, PGNO_INVALID, PGNO_INVALID,
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_lp->level + 1, P_IBTREE);
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else
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P_INIT(pp, file_dbp->pgsize,
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PGNO_ROOT, PGNO_INVALID, PGNO_INVALID,
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_lp->level + 1, P_IRECNO);
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RE_NREC_SET(pp,
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file_dbp->type == DB_RECNO ||
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F_ISSET(file_dbp, DB_BT_RECNUM) ?
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__bam_total(_lp) + __bam_total(_rp) : 0);
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pp->lsn = *lsnp;
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if ((ret = memp_fput(mpf, pp, DB_MPOOL_DIRTY)) != 0)
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goto fatal;
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pp = NULL;
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}
|
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|
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/*
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* Finally, redo the next-page link if necessary. This is of
|
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* interest only if it wasn't a root split -- inserting a new
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* page in the tree requires that any following page have its
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* previous-page pointer updated to our new page. The next
|
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* page must exist because we're redoing the operation.
|
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*/
|
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if (!rootsplit && !IS_ZERO_LSN(argp->nlsn)) {
|
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if ((ret = memp_fget(mpf, &argp->npgno, 0, &np)) != 0) {
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(void)__db_pgerr(file_dbp, argp->npgno);
|
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np = NULL;
|
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goto out;
|
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}
|
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if (log_compare(&LSN(np), &argp->nlsn) == 0) {
|
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PREV_PGNO(np) = argp->right;
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np->lsn = *lsnp;
|
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if ((ret = memp_fput(mpf,
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np, DB_MPOOL_DIRTY)) != 0)
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goto fatal;
|
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np = NULL;
|
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}
|
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}
|
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} else {
|
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/*
|
|
* If the split page is wrong, replace its contents with the
|
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* logged page contents. If the page doesn't exist, it means
|
|
* that the create of the page never happened, nor did any of
|
|
* the adds onto the page that caused the split, and there's
|
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* really no undo-ing to be done.
|
|
*/
|
|
if ((ret = memp_fget(mpf, &pgno, 0, &pp)) != 0) {
|
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pp = NULL;
|
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goto lrundo;
|
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}
|
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if (log_compare(lsnp, &LSN(pp)) == 0) {
|
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memcpy(pp, argp->pg.data, argp->pg.size);
|
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if ((ret = memp_fput(mpf, pp, DB_MPOOL_DIRTY)) != 0)
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goto fatal;
|
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pp = NULL;
|
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}
|
|
|
|
/*
|
|
* If it's a root split and the left child ever existed, update
|
|
* its LSN. (If it's not a root split, we've updated the left
|
|
* page already -- it's the same as the split page.) If the
|
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* right child ever existed, root split or not, update its LSN.
|
|
* The undo of the page allocation(s) will restore them to the
|
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* free list.
|
|
*/
|
|
lrundo: if ((rootsplit && lp != NULL) || rp != NULL) {
|
|
if (rootsplit && lp != NULL &&
|
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log_compare(lsnp, &LSN(lp)) == 0) {
|
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lp->lsn = argp->llsn;
|
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if ((ret =
|
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memp_fput(mpf, lp, DB_MPOOL_DIRTY)) != 0)
|
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goto fatal;
|
|
lp = NULL;
|
|
}
|
|
if (rp != NULL &&
|
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log_compare(lsnp, &LSN(rp)) == 0) {
|
|
rp->lsn = argp->rlsn;
|
|
if ((ret =
|
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memp_fput(mpf, rp, DB_MPOOL_DIRTY)) != 0)
|
|
goto fatal;
|
|
rp = NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Finally, undo the next-page link if necessary. This is of
|
|
* interest only if it wasn't a root split -- inserting a new
|
|
* page in the tree requires that any following page have its
|
|
* previous-page pointer updated to our new page. Since it's
|
|
* possible that the next-page never existed, we ignore it as
|
|
* if there's nothing to undo.
|
|
*/
|
|
if (!rootsplit && !IS_ZERO_LSN(argp->nlsn)) {
|
|
if ((ret = memp_fget(mpf, &argp->npgno, 0, &np)) != 0) {
|
|
np = NULL;
|
|
goto done;
|
|
}
|
|
if (log_compare(lsnp, &LSN(np)) == 0) {
|
|
PREV_PGNO(np) = argp->left;
|
|
np->lsn = argp->nlsn;
|
|
if (memp_fput(mpf, np, DB_MPOOL_DIRTY))
|
|
goto fatal;
|
|
np = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
done: *lsnp = argp->prev_lsn;
|
|
ret = 0;
|
|
|
|
if (0) {
|
|
fatal: (void)__db_panic(file_dbp);
|
|
}
|
|
out: /* Free any pages that weren't dirtied. */
|
|
if (pp != NULL && (t_ret = memp_fput(mpf, pp, 0)) != 0 && ret == 0)
|
|
ret = t_ret;
|
|
if (lp != NULL && (t_ret = memp_fput(mpf, lp, 0)) != 0 && ret == 0)
|
|
ret = t_ret;
|
|
if (np != NULL && (t_ret = memp_fput(mpf, np, 0)) != 0 && ret == 0)
|
|
ret = t_ret;
|
|
if (rp != NULL && (t_ret = memp_fput(mpf, rp, 0)) != 0 && ret == 0)
|
|
ret = t_ret;
|
|
|
|
/* Free any allocated space. */
|
|
if (_lp != NULL)
|
|
__db_free(_lp);
|
|
if (_rp != NULL)
|
|
__db_free(_rp);
|
|
|
|
REC_CLOSE;
|
|
}
|
|
|
|
/*
|
|
* __bam_rsplit_recover --
|
|
* Recovery function for a reverse split.
|
|
*
|
|
* PUBLIC: int __bam_rsplit_recover
|
|
* PUBLIC: __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
|
|
*/
|
|
int
|
|
__bam_rsplit_recover(logp, dbtp, lsnp, redo, info)
|
|
DB_LOG *logp;
|
|
DBT *dbtp;
|
|
DB_LSN *lsnp;
|
|
int redo;
|
|
void *info;
|
|
{
|
|
__bam_rsplit_args *argp;
|
|
DB *file_dbp, *mdbp;
|
|
DB_MPOOLFILE *mpf;
|
|
PAGE *pagep;
|
|
db_pgno_t pgno;
|
|
int cmp_n, cmp_p, modified, ret;
|
|
|
|
REC_PRINT(__bam_rsplit_print);
|
|
REC_INTRO(__bam_rsplit_read);
|
|
|
|
/* Fix the root page. */
|
|
pgno = PGNO_ROOT;
|
|
if ((ret = memp_fget(mpf, &pgno, 0, &pagep)) != 0) {
|
|
/* The root page must always exist. */
|
|
__db_pgerr(file_dbp, pgno);
|
|
goto out;
|
|
}
|
|
modified = 0;
|
|
cmp_n = log_compare(lsnp, &LSN(pagep));
|
|
cmp_p = log_compare(&LSN(pagep), &argp->rootlsn);
|
|
if (cmp_p == 0 && redo) {
|
|
/* Need to redo update described. */
|
|
memcpy(pagep, argp->pgdbt.data, argp->pgdbt.size);
|
|
pagep->pgno = PGNO_ROOT;
|
|
pagep->lsn = *lsnp;
|
|
modified = 1;
|
|
} else if (cmp_n == 0 && !redo) {
|
|
/* Need to undo update described. */
|
|
P_INIT(pagep, file_dbp->pgsize, PGNO_ROOT,
|
|
argp->nrec, PGNO_INVALID, pagep->level + 1,
|
|
file_dbp->type == DB_BTREE ? P_IBTREE : P_IRECNO);
|
|
if ((ret = __db_pitem(file_dbp, pagep, 0,
|
|
argp->rootent.size, &argp->rootent, NULL)) != 0)
|
|
goto out;
|
|
pagep->lsn = argp->rootlsn;
|
|
modified = 1;
|
|
}
|
|
if ((ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0) {
|
|
(void)__db_panic(file_dbp);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Fix the page copied over the root page. It's possible that the
|
|
* page never made it to disk, so if we're undo-ing and the page
|
|
* doesn't exist, it's okay and there's nothing further to do.
|
|
*/
|
|
if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
|
|
if (!redo)
|
|
goto done;
|
|
(void)__db_pgerr(file_dbp, argp->pgno);
|
|
goto out;
|
|
}
|
|
modified = 0;
|
|
cmp_n = log_compare(lsnp, &LSN(pagep));
|
|
cmp_p = log_compare(&LSN(pagep), &LSN(argp->pgdbt.data));
|
|
if (cmp_p == 0 && redo) {
|
|
/* Need to redo update described. */
|
|
pagep->lsn = *lsnp;
|
|
modified = 1;
|
|
} else if (cmp_n == 0 && !redo) {
|
|
/* Need to undo update described. */
|
|
memcpy(pagep, argp->pgdbt.data, argp->pgdbt.size);
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* __bam_adj_recover --
|
|
* Recovery function for adj.
|
|
*
|
|
* PUBLIC: int __bam_adj_recover
|
|
* PUBLIC: __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
|
|
*/
|
|
int
|
|
__bam_adj_recover(logp, dbtp, lsnp, redo, info)
|
|
DB_LOG *logp;
|
|
DBT *dbtp;
|
|
DB_LSN *lsnp;
|
|
int redo;
|
|
void *info;
|
|
{
|
|
__bam_adj_args *argp;
|
|
DB *file_dbp, *mdbp;
|
|
DB_MPOOLFILE *mpf;
|
|
PAGE *pagep;
|
|
int cmp_n, cmp_p, modified, ret;
|
|
|
|
REC_PRINT(__bam_adj_print);
|
|
REC_INTRO(__bam_adj_read);
|
|
|
|
/* Get the page; if it never existed and we're undoing, we're done. */
|
|
if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
|
|
if (!redo)
|
|
goto done;
|
|
(void)__db_pgerr(file_dbp, argp->pgno);
|
|
goto out;
|
|
}
|
|
|
|
modified = 0;
|
|
cmp_n = log_compare(lsnp, &LSN(pagep));
|
|
cmp_p = log_compare(&LSN(pagep), &argp->lsn);
|
|
if (cmp_p == 0 && redo) {
|
|
/* Need to redo update described. */
|
|
if ((ret = __bam_adjindx(file_dbp,
|
|
pagep, argp->indx, argp->indx_copy, argp->is_insert)) != 0)
|
|
goto err;
|
|
|
|
LSN(pagep) = *lsnp;
|
|
modified = 1;
|
|
} else if (cmp_n == 0 && !redo) {
|
|
/* Need to undo update described. */
|
|
if ((ret = __bam_adjindx(file_dbp,
|
|
pagep, argp->indx, argp->indx_copy, !argp->is_insert)) != 0)
|
|
goto err;
|
|
|
|
LSN(pagep) = argp->lsn;
|
|
modified = 1;
|
|
}
|
|
if ((ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
|
|
goto out;
|
|
|
|
done: *lsnp = argp->prev_lsn;
|
|
ret = 0;
|
|
|
|
if (0) {
|
|
err: (void)memp_fput(mpf, pagep, 0);
|
|
}
|
|
out: REC_CLOSE;
|
|
}
|
|
|
|
/*
|
|
* __bam_cadjust_recover --
|
|
* Recovery function for the adjust of a count change in an internal
|
|
* page.
|
|
*
|
|
* PUBLIC: int __bam_cadjust_recover
|
|
* PUBLIC: __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
|
|
*/
|
|
int
|
|
__bam_cadjust_recover(logp, dbtp, lsnp, redo, info)
|
|
DB_LOG *logp;
|
|
DBT *dbtp;
|
|
DB_LSN *lsnp;
|
|
int redo;
|
|
void *info;
|
|
{
|
|
__bam_cadjust_args *argp;
|
|
DB *file_dbp, *mdbp;
|
|
DB_MPOOLFILE *mpf;
|
|
PAGE *pagep;
|
|
int cmp_n, cmp_p, modified, ret;
|
|
|
|
REC_PRINT(__bam_cadjust_print);
|
|
REC_INTRO(__bam_cadjust_read);
|
|
|
|
/* Get the page; if it never existed and we're undoing, we're done. */
|
|
if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
|
|
if (!redo)
|
|
goto done;
|
|
(void)__db_pgerr(file_dbp, argp->pgno);
|
|
goto out;
|
|
}
|
|
|
|
modified = 0;
|
|
cmp_n = log_compare(lsnp, &LSN(pagep));
|
|
cmp_p = log_compare(&LSN(pagep), &argp->lsn);
|
|
if (cmp_p == 0 && redo) {
|
|
/* Need to redo update described. */
|
|
if (file_dbp->type == DB_BTREE &&
|
|
F_ISSET(file_dbp, DB_BT_RECNUM)) {
|
|
GET_BINTERNAL(pagep, argp->indx)->nrecs += argp->adjust;
|
|
if (argp->total && PGNO(pagep) == PGNO_ROOT)
|
|
RE_NREC_ADJ(pagep, argp->adjust);
|
|
}
|
|
if (file_dbp->type == DB_RECNO) {
|
|
GET_RINTERNAL(pagep, argp->indx)->nrecs += argp->adjust;
|
|
if (argp->total && PGNO(pagep) == PGNO_ROOT)
|
|
RE_NREC_ADJ(pagep, argp->adjust);
|
|
}
|
|
|
|
LSN(pagep) = *lsnp;
|
|
modified = 1;
|
|
} else if (cmp_n == 0 && !redo) {
|
|
/* Need to undo update described. */
|
|
if (file_dbp->type == DB_BTREE &&
|
|
F_ISSET(file_dbp, DB_BT_RECNUM)) {
|
|
GET_BINTERNAL(pagep, argp->indx)->nrecs -= argp->adjust;
|
|
if (argp->total && PGNO(pagep) == PGNO_ROOT)
|
|
RE_NREC_ADJ(pagep, argp->adjust);
|
|
}
|
|
if (file_dbp->type == DB_RECNO) {
|
|
GET_RINTERNAL(pagep, argp->indx)->nrecs -= argp->adjust;
|
|
if (argp->total && PGNO(pagep) == PGNO_ROOT)
|
|
RE_NREC_ADJ(pagep, -(argp->adjust));
|
|
}
|
|
LSN(pagep) = argp->lsn;
|
|
modified = 1;
|
|
}
|
|
if ((ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
|
|
goto out;
|
|
|
|
done: *lsnp = argp->prev_lsn;
|
|
ret = 0;
|
|
|
|
out: REC_CLOSE;
|
|
}
|
|
|
|
/*
|
|
* __bam_cdel_recover --
|
|
* Recovery function for the intent-to-delete of a cursor record.
|
|
*
|
|
* PUBLIC: int __bam_cdel_recover
|
|
* PUBLIC: __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
|
|
*/
|
|
int
|
|
__bam_cdel_recover(logp, dbtp, lsnp, redo, info)
|
|
DB_LOG *logp;
|
|
DBT *dbtp;
|
|
DB_LSN *lsnp;
|
|
int redo;
|
|
void *info;
|
|
{
|
|
__bam_cdel_args *argp;
|
|
DB *file_dbp, *mdbp;
|
|
DB_MPOOLFILE *mpf;
|
|
PAGE *pagep;
|
|
int cmp_n, cmp_p, modified, ret;
|
|
|
|
REC_PRINT(__bam_cdel_print);
|
|
REC_INTRO(__bam_cdel_read);
|
|
|
|
/* Get the page; if it never existed and we're undoing, we're done. */
|
|
if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
|
|
if (!redo)
|
|
goto done;
|
|
(void)__db_pgerr(file_dbp, argp->pgno);
|
|
goto out;
|
|
}
|
|
|
|
modified = 0;
|
|
cmp_n = log_compare(lsnp, &LSN(pagep));
|
|
cmp_p = log_compare(&LSN(pagep), &argp->lsn);
|
|
if (cmp_p == 0 && redo) {
|
|
/* Need to redo update described. */
|
|
B_DSET(GET_BKEYDATA(pagep, argp->indx + O_INDX)->type);
|
|
|
|
LSN(pagep) = *lsnp;
|
|
modified = 1;
|
|
} else if (cmp_n == 0 && !redo) {
|
|
/* Need to undo update described. */
|
|
B_DCLR(GET_BKEYDATA(pagep, argp->indx + O_INDX)->type);
|
|
|
|
LSN(pagep) = argp->lsn;
|
|
modified = 1;
|
|
}
|
|
if ((ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
|
|
goto out;
|
|
|
|
done: *lsnp = argp->prev_lsn;
|
|
ret = 0;
|
|
|
|
out: REC_CLOSE;
|
|
}
|
|
|
|
/*
|
|
* __bam_repl_recover --
|
|
* Recovery function for page item replacement.
|
|
*
|
|
* PUBLIC: int __bam_repl_recover
|
|
* PUBLIC: __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
|
|
*/
|
|
int
|
|
__bam_repl_recover(logp, dbtp, lsnp, redo, info)
|
|
DB_LOG *logp;
|
|
DBT *dbtp;
|
|
DB_LSN *lsnp;
|
|
int redo;
|
|
void *info;
|
|
{
|
|
__bam_repl_args *argp;
|
|
BKEYDATA *bk;
|
|
DB *file_dbp, *mdbp;
|
|
DBT dbt;
|
|
DB_MPOOLFILE *mpf;
|
|
PAGE *pagep;
|
|
int cmp_n, cmp_p, modified, ret;
|
|
u_int8_t *p;
|
|
|
|
REC_PRINT(__bam_repl_print);
|
|
REC_INTRO(__bam_repl_read);
|
|
|
|
/* Get the page; if it never existed and we're undoing, we're done. */
|
|
if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
|
|
if (!redo)
|
|
goto done;
|
|
(void)__db_pgerr(file_dbp, argp->pgno);
|
|
goto out;
|
|
}
|
|
bk = GET_BKEYDATA(pagep, argp->indx);
|
|
|
|
modified = 0;
|
|
cmp_n = log_compare(lsnp, &LSN(pagep));
|
|
cmp_p = log_compare(&LSN(pagep), &argp->lsn);
|
|
if (cmp_p == 0 && redo) {
|
|
/*
|
|
* Need to redo update described.
|
|
*
|
|
* Re-build the replacement item.
|
|
*/
|
|
memset(&dbt, 0, sizeof(dbt));
|
|
dbt.size = argp->prefix + argp->suffix + argp->repl.size;
|
|
if ((dbt.data = __db_malloc(dbt.size)) == NULL) {
|
|
ret = ENOMEM;
|
|
goto err;
|
|
}
|
|
p = dbt.data;
|
|
memcpy(p, bk->data, argp->prefix);
|
|
p += argp->prefix;
|
|
memcpy(p, argp->repl.data, argp->repl.size);
|
|
p += argp->repl.size;
|
|
memcpy(p, bk->data + (bk->len - argp->suffix), argp->suffix);
|
|
|
|
ret = __bam_ritem(file_dbp, pagep, argp->indx, &dbt);
|
|
__db_free(dbt.data);
|
|
if (ret != 0)
|
|
goto err;
|
|
|
|
LSN(pagep) = *lsnp;
|
|
modified = 1;
|
|
} else if (cmp_n == 0 && !redo) {
|
|
/*
|
|
* Need to undo update described.
|
|
*
|
|
* Re-build the original item.
|
|
*/
|
|
memset(&dbt, 0, sizeof(dbt));
|
|
dbt.size = argp->prefix + argp->suffix + argp->orig.size;
|
|
if ((dbt.data = __db_malloc(dbt.size)) == NULL) {
|
|
ret = ENOMEM;
|
|
goto err;
|
|
}
|
|
p = dbt.data;
|
|
memcpy(p, bk->data, argp->prefix);
|
|
p += argp->prefix;
|
|
memcpy(p, argp->orig.data, argp->orig.size);
|
|
p += argp->orig.size;
|
|
memcpy(p, bk->data + (bk->len - argp->suffix), argp->suffix);
|
|
|
|
ret = __bam_ritem(file_dbp, pagep, argp->indx, &dbt);
|
|
__db_free(dbt.data);
|
|
if (ret != 0)
|
|
goto err;
|
|
|
|
/* Reset the deleted flag, if necessary. */
|
|
if (argp->isdeleted)
|
|
B_DSET(GET_BKEYDATA(pagep, argp->indx)->type);
|
|
|
|
LSN(pagep) = argp->lsn;
|
|
modified = 1;
|
|
}
|
|
if ((ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
|
|
goto out;
|
|
|
|
done: *lsnp = argp->prev_lsn;
|
|
ret = 0;
|
|
|
|
if (0) {
|
|
err: (void)memp_fput(mpf, pagep, 0);
|
|
}
|
|
out: REC_CLOSE;
|
|
}
|