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423 lines
9.0 KiB
423 lines
9.0 KiB
3 years ago
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/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1999
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* Sleepycat Software. All rights reserved.
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*/
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#include "db_config.h"
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#ifndef lint
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static const char sccsid[] = "@(#)qam_rec.c 11.8 (Sleepycat) 9/14/99";
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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 <errno.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 "db_shash.h"
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#include "db_am.h"
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#include "qam.h"
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#include "log.h"
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/*
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* CDB___qam_inc_recover --
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* Recovery function for inc.
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*
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* PUBLIC: int CDB___qam_inc_recover __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
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*/
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int
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CDB___qam_inc_recover(dbenv, dbtp, lsnp, redo, info)
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DB_ENV *dbenv;
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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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__qam_inc_args *argp;
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DB *file_dbp;
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DBC *dbc;
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DB_LOCK lock;
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DB_MPOOLFILE *mpf;
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QMETA *meta;
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db_pgno_t metapg;
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int cmp_p, modified, ret;
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COMPQUIET(info, NULL);
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REC_PRINT(CDB___qam_inc_print);
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REC_INTRO(CDB___qam_inc_read, 1);
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metapg = ((QUEUE *)file_dbp->q_internal)->q_meta;
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dbc->txn = argp->txnid;
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if ((ret = CDB___db_lget(dbc, 0, metapg, DB_LOCK_WRITE, 0, &lock)) != 0)
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goto done;
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if ((ret = CDB_memp_fget(mpf, &metapg, 0, &meta)) != 0) {
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if (redo) {
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if ((ret = CDB_memp_fget(mpf,
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&metapg, DB_MPOOL_CREATE, &meta)) != 0) {
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(void)__LPUT(dbc, lock);
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goto out;
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}
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meta->dbmeta.pgno = metapg;
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meta->dbmeta.type = P_QAMMETA;
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} else {
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*lsnp = argp->prev_lsn;
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ret = 0;
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(void)__LPUT(dbc, lock);
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goto out;
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}
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}
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modified = 0;
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cmp_p = CDB_log_compare(&LSN(meta), &argp->lsn);
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/* Increment the counter if the page is before this lsn */
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if (cmp_p == 0) {
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modified = 1;
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meta->cur_recno++;
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meta->dbmeta.lsn = *lsnp;
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}
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if ((ret = CDB_memp_fput(mpf, meta, modified ? DB_MPOOL_DIRTY : 0)))
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goto out;
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(void)__LPUT(dbc, lock);
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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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* CDB___qam_incfirst_recover --
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* Recovery function for incfirst.
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*
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* PUBLIC: int CDB___qam_incfirst_recover
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* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
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*/
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int
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CDB___qam_incfirst_recover(dbenv, dbtp, lsnp, redo, info)
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DB_ENV *dbenv;
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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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__qam_incfirst_args *argp;
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DB *file_dbp;
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DBC *dbc;
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DB_LOCK lock;
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DB_MPOOLFILE *mpf;
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QMETA *meta;
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db_pgno_t metapg;
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int modified, ret;
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COMPQUIET(info, NULL);
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REC_PRINT(CDB___qam_incfirst_print);
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REC_INTRO(CDB___qam_incfirst_read, 1);
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metapg = ((QUEUE *)file_dbp->q_internal)->q_meta;
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dbc->txn = argp->txnid;
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if ((ret = CDB___db_lget(dbc, 0, metapg, DB_LOCK_WRITE, 0, &lock)) != 0)
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goto done;
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if ((ret = CDB_memp_fget(mpf, &metapg, 0, &meta)) != 0) {
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if (redo) {
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if ((ret = CDB_memp_fget(mpf,
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&metapg, DB_MPOOL_CREATE, &meta)) != 0) {
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(void)__LPUT(dbc, lock);
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goto out;
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}
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meta->dbmeta.pgno = metapg;
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meta->dbmeta.type = P_QAMMETA;
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} else {
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*lsnp = argp->prev_lsn;
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ret = 0;
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(void)__LPUT(dbc, lock);
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goto out;
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}
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}
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modified = 0;
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/*
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* Only move first_recno backwards so we pick up the aborted delete.
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* If we are going forward then we could patch first up, but it will
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* get fixed by normal operations.
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*/
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if (!redo) {
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if (meta->first_recno > argp->recno) {
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meta->first_recno = argp->recno;
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modified = 1;
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}
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}
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if ((ret = CDB_memp_fput(mpf, meta, modified ? DB_MPOOL_DIRTY : 0)))
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goto out;
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(void)__LPUT(dbc, lock);
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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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* CDB___qam_mvptr_recover --
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* Recovery function for mvptr.
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*
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* PUBLIC: int CDB___qam_mvptr_recover
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* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
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*/
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int
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CDB___qam_mvptr_recover(dbenv, dbtp, lsnp, redo, info)
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DB_ENV *dbenv;
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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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__qam_mvptr_args *argp;
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DB *file_dbp;
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DBC *dbc;
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DB_LOCK lock;
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DB_MPOOLFILE *mpf;
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QMETA *meta;
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db_pgno_t metapg;
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int cmp_p, cmp_n, modified, ret;
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COMPQUIET(info, NULL);
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REC_PRINT(CDB___qam_mvptr_print);
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REC_INTRO(CDB___qam_mvptr_read, 1);
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metapg = ((QUEUE *)file_dbp->q_internal)->q_meta;
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dbc->txn = argp->txnid;
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if ((ret = CDB___db_lget(dbc, 0, metapg, DB_LOCK_WRITE, 0, &lock)) != 0)
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goto done;
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if ((ret = CDB_memp_fget(mpf, &metapg, 0, &meta)) != 0) {
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if (redo) {
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if ((ret = CDB_memp_fget(mpf,
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&metapg, DB_MPOOL_CREATE, &meta)) != 0) {
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(void)__LPUT(dbc, lock);
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goto out;
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}
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meta->dbmeta.pgno = metapg;
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meta->dbmeta.type = P_QAMMETA;
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} else {
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*lsnp = argp->prev_lsn;
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ret = 0;
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(void)__LPUT(dbc, lock);
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goto out;
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}
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}
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modified = 0;
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cmp_n = CDB_log_compare(lsnp, &meta->dbmeta.lsn);
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cmp_p = CDB_log_compare(&meta->dbmeta.lsn, &argp->metalsn);
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/*
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* We do not undo movements, just back out the LSN change
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* On redo, since we are checking for exact LSN matches
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* we can just redo the value.
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*/
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if (cmp_n == 0 && !redo) {
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modified = 1;
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meta->dbmeta.lsn = argp->metalsn;
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} else if (cmp_p == 0 && redo) {
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if (argp->opcode & QAM_SETFIRST)
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meta->first_recno = argp->new_first;
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if (argp->opcode & QAM_SETCUR)
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meta->cur_recno = argp->new_cur;
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modified = 1;
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meta->dbmeta.lsn = *lsnp;
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}
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if ((ret = CDB_memp_fput(mpf, meta, modified ? DB_MPOOL_DIRTY : 0)))
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goto out;
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(void)__LPUT(dbc, lock);
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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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* CDB___qam_del_recover --
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* Recovery function for del.
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*
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* PUBLIC: int CDB___qam_del_recover __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
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*/
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int
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CDB___qam_del_recover(dbenv, dbtp, lsnp, redo, info)
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DB_ENV *dbenv;
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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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__qam_del_args *argp;
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DB *file_dbp;
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DBC *dbc;
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DB_LOCK lock;
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DB_MPOOLFILE *mpf;
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QAMDATA *qp;
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QMETA *meta;
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QPAGE *pagep;
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db_pgno_t metapg;
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int cmp_n, modified, ret;
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COMPQUIET(info, NULL);
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REC_PRINT(CDB___qam_del_print);
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REC_INTRO(CDB___qam_del_read, 1);
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dbc->txn = argp->txnid;
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if ((ret = CDB_memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
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if (redo) {
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if ((ret = CDB_memp_fget(mpf,
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&argp->pgno, DB_MPOOL_CREATE, &pagep)) != 0)
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goto out;
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pagep->pgno = argp->pgno;
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pagep->type = P_QAMDATA;
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} else {
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*lsnp = argp->prev_lsn;
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ret = 0;
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goto out;
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}
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}
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modified = 0;
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cmp_n = CDB_log_compare(lsnp, &LSN(pagep));
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if (cmp_n > 0 && redo) {
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/* Need to redo delete - clear the valid bit */
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qp = QAM_GET_RECORD(file_dbp, pagep, argp->indx);
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F_CLR(qp, QAM_VALID);
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LSN(pagep) = *lsnp;
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modified = 1;
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} else if (cmp_n <= 0 && !redo) {
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/* make sure first is behind us */
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metapg = ((QUEUE *)file_dbp->q_internal)->q_meta;
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if ((ret =
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CDB___db_lget(dbc, 0, metapg, DB_LOCK_WRITE, 0, &lock)) != 0)
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return (ret);
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if ((ret = CDB_memp_fget(file_dbp->mpf, &metapg, 0, &meta)) != 0) {
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(void)__LPUT(dbc, lock);
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goto done;
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}
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if (argp->recno < meta->first_recno) {
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meta->first_recno = argp->recno;
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(void)CDB_memp_fput(file_dbp->mpf, meta, DB_MPOOL_DIRTY);
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} else
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(void)CDB_memp_fput(file_dbp->mpf, meta, 0);
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(void)__LPUT(dbc, lock);
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/* Need to undo delete - mark the record as present */
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qp = QAM_GET_RECORD(file_dbp, pagep, argp->indx);
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F_SET(qp, QAM_VALID);
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LSN(pagep) = argp->lsn;
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modified = 1;
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}
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if ((ret = CDB_memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)))
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goto out;
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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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* CDB___qam_add_recover --
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* Recovery function for add.
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*
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* PUBLIC: int CDB___qam_add_recover __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
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*/
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int
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CDB___qam_add_recover(dbenv, dbtp, lsnp, redo, info)
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|
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DB_ENV *dbenv;
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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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__qam_add_args *argp;
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DB *file_dbp;
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DBC *dbc;
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DB_MPOOLFILE *mpf;
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QAMDATA *qp;
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QPAGE *pagep;
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int cmp_n, cmp_p, modified, ret;
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COMPQUIET(info, NULL);
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REC_PRINT(CDB___qam_add_print);
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|
|
REC_INTRO(CDB___qam_add_read, 1);
|
||
|
|
|
||
|
|
dbc->txn = argp->txnid;
|
||
|
|
modified = 0;
|
||
|
|
if ((ret = CDB_memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
|
||
|
|
if ((ret = CDB_memp_fget(mpf,
|
||
|
|
&argp->pgno, DB_MPOOL_CREATE, &pagep)) != 0)
|
||
|
|
goto out;
|
||
|
|
pagep->pgno = argp->pgno;
|
||
|
|
pagep->type = P_QAMDATA;
|
||
|
|
modified = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
cmp_n = CDB_log_compare(lsnp, &LSN(pagep));
|
||
|
|
cmp_p = CDB_log_compare(&LSN(pagep), &argp->lsn);
|
||
|
|
|
||
|
|
if (cmp_p == 0 && redo) {
|
||
|
|
/* Need to redo add - put the record on page */
|
||
|
|
if ((ret = CDB___qam_pitem(dbc, pagep, argp->indx, argp->recno,
|
||
|
|
&argp->data)) != 0)
|
||
|
|
goto err;
|
||
|
|
LSN(pagep) = *lsnp;
|
||
|
|
modified = 1;
|
||
|
|
} else if (cmp_n == 0 && !redo) {
|
||
|
|
/*
|
||
|
|
* Need to undo add
|
||
|
|
* If this was an overwrite, put old record back.
|
||
|
|
* Otherwise just clear the valid bit
|
||
|
|
*/
|
||
|
|
if (argp->olddata.size != 0) {
|
||
|
|
if ((ret = CDB___qam_pitem(dbc, pagep,
|
||
|
|
argp->indx, argp->recno, &argp->olddata)) != 0)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
if (!(argp->vflag & QAM_VALID)) {
|
||
|
|
qp = QAM_GET_RECORD(
|
||
|
|
file_dbp, pagep, argp->indx);
|
||
|
|
F_CLR(qp, QAM_VALID);
|
||
|
|
}
|
||
|
|
modified = 1;
|
||
|
|
} else {
|
||
|
|
qp = QAM_GET_RECORD(file_dbp, pagep, argp->indx);
|
||
|
|
qp->flags = 0;
|
||
|
|
modified = 1;
|
||
|
|
}
|
||
|
|
LSN(pagep) = argp->lsn;
|
||
|
|
}
|
||
|
|
|
||
|
|
err: if ((ret = CDB_memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)))
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
done: *lsnp = argp->prev_lsn;
|
||
|
|
ret = 0;
|
||
|
|
|
||
|
|
out: REC_CLOSE;
|
||
|
|
}
|