319 lines
7.9 KiB
C
319 lines
7.9 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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/*
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* Copyright (c) 1995, 1996
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* The President and Fellows of Harvard University. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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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[] = "@(#)log_rec.c 10.16 (Sleepycat) 1/17/98";
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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 <errno.h>
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#include <fcntl.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 "shqueue.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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static int __log_open_file __P((DB_LOG *,
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u_int8_t *, char *, DBTYPE, u_int32_t));
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/*
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* PUBLIC: int __log_register_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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__log_register_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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__log_register_args *argp;
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int ret;
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#ifdef DEBUG_RECOVER
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__log_register_print(logp, dbtp, lsnp, redo, info);
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#endif
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COMPQUIET(info, NULL);
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COMPQUIET(lsnp, NULL);
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F_SET(logp, DB_AM_RECOVER);
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if ((ret = __log_register_read(dbtp->data, &argp)) != 0)
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goto out;
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if ((argp->opcode == LOG_CHECKPOINT && redo == TXN_OPENFILES) ||
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(argp->opcode == LOG_OPEN &&
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(redo == TXN_REDO || redo == TXN_OPENFILES ||
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redo == TXN_FORWARD_ROLL)) ||
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(argp->opcode == LOG_CLOSE &&
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(redo == TXN_UNDO || redo == TXN_BACKWARD_ROLL))) {
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/*
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* If we are redoing an open or undoing a close, then we need
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* to open a file.
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*/
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ret = __log_open_file(logp,
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argp->uid.data, argp->name.data, argp->ftype, argp->id);
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if (ret == ENOENT) {
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if (redo == TXN_OPENFILES)
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__db_err(logp->dbenv,
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"warning: file %s not found",
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argp->name.data);
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ret = 0;
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}
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} else if (argp->opcode != LOG_CHECKPOINT) {
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/*
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* If we are redoing a close or undoing an open, then we need
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* to close the file.
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*
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* If the file is deleted, then we can just ignore this close.
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* Otherwise, we'd better have a valid dbp that we should either
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* close or whose reference count should be decremented.
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*/
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LOCK_LOGTHREAD(logp);
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if (logp->dbentry[argp->id].dbp == NULL) {
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if (!logp->dbentry[argp->id].deleted)
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ret = EINVAL;
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} else if (--logp->dbentry[argp->id].refcount == 0) {
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ret = logp->dbentry[argp->id].dbp->close(
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logp->dbentry[argp->id].dbp, 0);
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logp->dbentry[argp->id].dbp = NULL;
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}
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UNLOCK_LOGTHREAD(logp);
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}
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out: F_CLR(logp, DB_AM_RECOVER);
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if (argp != NULL)
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__db_free(argp);
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return (ret);
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}
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/* Hand coded routines. */
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/*
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* Called during log_register recovery. Make sure that we have an
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* entry in the dbentry table for this ndx.
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* Returns 0 on success, non-zero on error.
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*/
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static int
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__log_open_file(lp, uid, name, ftype, ndx)
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DB_LOG *lp;
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u_int8_t *uid;
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char *name;
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DBTYPE ftype;
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u_int32_t ndx;
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{
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DB *dbp;
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int ret;
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LOCK_LOGTHREAD(lp);
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if (ndx < lp->dbentry_cnt &&
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(lp->dbentry[ndx].deleted == 1 || lp->dbentry[ndx].dbp != NULL)) {
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lp->dbentry[ndx].refcount++;
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UNLOCK_LOGTHREAD(lp);
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return (0);
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}
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UNLOCK_LOGTHREAD(lp);
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/* Need to open file. */
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dbp = NULL;
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if ((ret = db_open(name, ftype, 0, 0, lp->dbenv, NULL, &dbp)) == 0) {
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/*
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* Verify that we are opening the same file that we were
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* referring to when we wrote this log record.
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*/
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if (memcmp(uid, dbp->lock.fileid, DB_FILE_ID_LEN) != 0) {
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(void)dbp->close(dbp, 0);
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dbp = NULL;
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ret = ENOENT;
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}
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}
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if (ret == 0 || ret == ENOENT)
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(void)__log_add_logid(lp, dbp, ndx);
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return (ret);
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}
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/*
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* This function returns:
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* 0 SUCCESS (the entry was not previously set and is now set or the
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* entry was previously set and we just inced the ref count.
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* >0 on system error (returns errno value).
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* PUBLIC: int __log_add_logid __P((DB_LOG *, DB *, u_int32_t));
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*/
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int
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__log_add_logid(logp, dbp, ndx)
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DB_LOG *logp;
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DB *dbp;
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u_int32_t ndx;
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{
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DB_ENTRY *temp_entryp;
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u_int32_t i;
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int ret;
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ret = 0;
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LOCK_LOGTHREAD(logp);
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/*
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* Check if we need to grow the table.
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*/
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if (logp->dbentry_cnt <= ndx) {
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if (logp->dbentry_cnt == 0) {
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logp->dbentry = (DB_ENTRY *)
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__db_malloc(DB_GROW_SIZE * sizeof(DB_ENTRY));
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if (logp->dbentry == NULL) {
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ret = ENOMEM;
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goto err;
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}
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} else {
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temp_entryp = (DB_ENTRY *)__db_realloc(logp->dbentry,
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(DB_GROW_SIZE + logp->dbentry_cnt) *
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sizeof(DB_ENTRY));
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if (temp_entryp == NULL) {
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ret = ENOMEM;
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goto err;
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}
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logp->dbentry = temp_entryp;
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}
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/* Initialize the new entries. */
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for (i = logp->dbentry_cnt;
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i < logp->dbentry_cnt + DB_GROW_SIZE; i++) {
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logp->dbentry[i].dbp = NULL;
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logp->dbentry[i].deleted = 0;
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}
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logp->dbentry_cnt += DB_GROW_SIZE;
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}
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if (logp->dbentry[ndx].deleted == 0 && logp->dbentry[ndx].dbp == NULL) {
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logp->dbentry[ndx].dbp = dbp;
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logp->dbentry[ndx].refcount = 1;
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logp->dbentry[ndx].deleted = dbp == NULL;
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} else
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logp->dbentry[ndx].refcount++;
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err: UNLOCK_LOGTHREAD(logp);
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return (ret);
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}
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/*
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* __db_fileid_to_db --
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* Return the DB corresponding to the specified fileid.
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*
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* PUBLIC: int __db_fileid_to_db __P((DB_LOG *, DB **, u_int32_t));
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*/
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int
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__db_fileid_to_db(logp, dbpp, ndx)
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DB_LOG *logp;
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DB **dbpp;
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u_int32_t ndx;
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{
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int ret;
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ret = 0;
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LOCK_LOGTHREAD(logp);
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/*
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* Return DB_DELETED if the file has been deleted
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* (it's not an error).
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*/
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if (logp->dbentry[ndx].deleted) {
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ret = DB_DELETED;
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goto err;
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}
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/*
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* Otherwise return 0, but if we don't have a corresponding DB,
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* it's an error.
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*/
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if ((*dbpp = logp->dbentry[ndx].dbp) == NULL)
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ret = ENOENT;
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err: UNLOCK_LOGTHREAD(logp);
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return (ret);
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}
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/*
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* Close files that were opened by the recovery daemon.
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*
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* PUBLIC: void __log_close_files __P((DB_LOG *));
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*/
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void
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__log_close_files(logp)
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DB_LOG *logp;
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{
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u_int32_t i;
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LOCK_LOGTHREAD(logp);
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for (i = 0; i < logp->dbentry_cnt; i++)
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if (logp->dbentry[i].dbp)
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logp->dbentry[i].dbp->close(logp->dbentry[i].dbp, 0);
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UNLOCK_LOGTHREAD(logp);
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}
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/*
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* PUBLIC: void __log_rem_logid __P((DB_LOG *, u_int32_t));
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*/
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void
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__log_rem_logid(logp, ndx)
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DB_LOG *logp;
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u_int32_t ndx;
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{
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LOCK_LOGTHREAD(logp);
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if (--logp->dbentry[ndx].refcount == 0) {
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logp->dbentry[ndx].dbp = NULL;
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logp->dbentry[ndx].deleted = 0;
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}
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UNLOCK_LOGTHREAD(logp);
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}
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