You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
453 lines
12 KiB
453 lines
12 KiB
/*-
|
|
* See the file LICENSE for redistribution information.
|
|
*
|
|
* Copyright (c) 1996, 1997, 1998, 1999
|
|
* Sleepycat Software. All rights reserved.
|
|
*/
|
|
/*
|
|
* Copyright (c) 1995, 1996
|
|
* The President and Fellows of Harvard University. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "db_config.h"
|
|
|
|
#ifndef lint
|
|
static const char sccsid[] = "@(#)log_rec.c 11.16 (Sleepycat) 10/19/99";
|
|
#endif /* not lint */
|
|
|
|
#ifndef NO_SYSTEM_INCLUDES
|
|
#include <sys/types.h>
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#endif
|
|
|
|
#include "db_int.h"
|
|
#include "log.h"
|
|
#include "db_dispatch.h"
|
|
#include "db_page.h"
|
|
#include "db_ext.h"
|
|
|
|
static int CDB___log_do_open __P((DB_LOG *, u_int8_t *, char *, DBTYPE, u_int32_t));
|
|
static int CDB___log_lid_to_fname __P((DB_LOG *, int32_t, FNAME **));
|
|
static int CDB___log_open_file __P((DB_LOG *, __log_register_args *));
|
|
|
|
/*
|
|
* PUBLIC: int CDB___log_register_recover
|
|
* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
|
|
*/
|
|
int
|
|
CDB___log_register_recover(dbenv, dbtp, lsnp, redo, info)
|
|
DB_ENV *dbenv;
|
|
DBT *dbtp;
|
|
DB_LSN *lsnp;
|
|
int redo;
|
|
void *info;
|
|
{
|
|
DB_ENTRY *dbe;
|
|
DB_LOG *logp;
|
|
__log_register_args *argp;
|
|
int do_rem, ret, t_ret;
|
|
|
|
logp = dbenv->lg_handle;
|
|
|
|
#ifdef DEBUG_RECOVER
|
|
CDB___log_register_print(logp, dbtp, lsnp, redo, info);
|
|
#endif
|
|
COMPQUIET(lsnp, NULL);
|
|
|
|
F_SET(logp, DBC_RECOVER);
|
|
|
|
if ((ret = CDB___log_register_read(dbtp->data, &argp)) != 0)
|
|
goto out;
|
|
|
|
if ((argp->opcode == LOG_OPEN &&
|
|
(redo == TXN_REDO || redo == TXN_OPENFILES ||
|
|
redo == TXN_FORWARD_ROLL)) ||
|
|
(argp->opcode == LOG_CLOSE &&
|
|
(redo == TXN_UNDO || redo == TXN_BACKWARD_ROLL))) {
|
|
/*
|
|
* If we are redoing an open or undoing a close, then we need
|
|
* to open a file.
|
|
*/
|
|
ret = CDB___log_open_file(logp, argp);
|
|
if (ret == ENOENT || ret == EINVAL) {
|
|
if (redo == TXN_OPENFILES && argp->name.size != 0 &&
|
|
(ret = CDB___db_txnlist_delete(info,
|
|
argp->name.data, argp->id, 0)) != 0)
|
|
goto out;
|
|
ret = 0;
|
|
}
|
|
} else if (argp->opcode != LOG_CHECKPOINT) {
|
|
/*
|
|
* If we are undoing an open, then we need to close the file.
|
|
*
|
|
* If the file is deleted, then we can just ignore this close.
|
|
* Otherwise, we should usually have a valid dbp we should
|
|
* close or whose reference count should be decremented.
|
|
* However, if we shut down without closing a file, we may, in
|
|
* fact, not have the file open, and that's OK.
|
|
*/
|
|
do_rem = 0;
|
|
MUTEX_THREAD_LOCK(logp->mutexp);
|
|
if (argp->id < logp->dbentry_cnt) {
|
|
dbe = &logp->dbentry[argp->id];
|
|
#ifdef DIAGNOSTIC
|
|
assert(dbe->refcount == 1);
|
|
#endif
|
|
ret = CDB___db_txnlist_close(info, argp->id, dbe->count);
|
|
if (dbe->dbp != NULL &&
|
|
(t_ret = dbe->dbp->close(dbe->dbp, 0)) != 0
|
|
&& ret == 0)
|
|
ret = t_ret;
|
|
do_rem = 1;
|
|
}
|
|
MUTEX_THREAD_UNLOCK(logp->mutexp);
|
|
if (do_rem)
|
|
(void)CDB___log_rem_logid(logp, argp->id);
|
|
} else if ((redo == TXN_UNDO || redo == TXN_OPENFILES) &&
|
|
(argp->id >= logp->dbentry_cnt ||
|
|
(!logp->dbentry[argp->id].deleted &&
|
|
logp->dbentry[argp->id].dbp == NULL))) {
|
|
/*
|
|
* It's a checkpoint and we are rolling backward. It
|
|
* is possible that the system was shut down and thus
|
|
* ended with a stable checkpoint; this file was never
|
|
* closed and has therefore not been reopened yet. If
|
|
* so, we need to try to open it.
|
|
*/
|
|
ret = CDB___log_open_file(logp, argp);
|
|
if (ret == ENOENT || ret == EINVAL) {
|
|
if (argp->name.size != 0 && (ret =
|
|
CDB___db_txnlist_delete(info,
|
|
argp->name.data, argp->id, 0)) != 0)
|
|
goto out;
|
|
ret = 0;
|
|
}
|
|
}
|
|
|
|
out: F_CLR(logp, DBC_RECOVER);
|
|
if (argp != NULL)
|
|
CDB___os_free(argp, 0);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* CDB___log_open_file --
|
|
* Called during CDB_log_register recovery. Make sure that we have an
|
|
* entry in the dbentry table for this ndx. Returns 0 on success,
|
|
* non-zero on error.
|
|
*/
|
|
static int
|
|
CDB___log_open_file(lp, argp)
|
|
DB_LOG *lp;
|
|
__log_register_args *argp;
|
|
{
|
|
DB_ENTRY *dbe;
|
|
|
|
/*
|
|
* We never re-open temporary files. Temp files are only
|
|
* useful during aborts in which case the dbp was entered
|
|
* when the file was registered. During recovery, we treat
|
|
* temp files as properly deleted files, allowing the open to
|
|
* fail and not reporting any errors when recovery fails to
|
|
* get a valid dbp from db_fileid_to_db.
|
|
*/
|
|
if (argp->name.size == 0) {
|
|
(void)CDB___log_add_logid(lp, NULL, argp->id);
|
|
return (ENOENT);
|
|
}
|
|
|
|
/*
|
|
* Because of reference counting, we cannot automatically close files
|
|
* during recovery, so when we're opening, we have to check that the
|
|
* name we are opening is what we expect. If it's not, then we close
|
|
* the old file and open the new one.
|
|
*/
|
|
MUTEX_THREAD_LOCK(lp->mutexp);
|
|
if (argp->id < lp->dbentry_cnt)
|
|
dbe = &lp->dbentry[argp->id];
|
|
else
|
|
dbe = NULL;
|
|
|
|
if (dbe != NULL && (dbe->deleted == 1 || dbe->dbp != NULL)) {
|
|
dbe->refcount++;
|
|
MUTEX_THREAD_UNLOCK(lp->mutexp);
|
|
return (0);
|
|
}
|
|
|
|
MUTEX_THREAD_UNLOCK(lp->mutexp);
|
|
|
|
return (CDB___log_do_open(lp,
|
|
argp->uid.data, argp->name.data, argp->ftype, argp->id));
|
|
}
|
|
|
|
/*
|
|
* CDB___log_do_open --
|
|
* Open files referenced in the log. This is the part of the open that
|
|
* is not protected by the thread mutex.
|
|
*/
|
|
static int
|
|
CDB___log_do_open(lp, uid, name, ftype, ndx)
|
|
DB_LOG *lp;
|
|
u_int8_t *uid;
|
|
char *name;
|
|
DBTYPE ftype;
|
|
u_int32_t ndx;
|
|
{
|
|
DB *dbp;
|
|
int ret;
|
|
u_int8_t zeroid[DB_FILE_ID_LEN];
|
|
|
|
if ((ret = CDB_db_create(&dbp, lp->dbenv, 0)) != 0)
|
|
return (ret);
|
|
if ((ret = dbp->open(dbp, name, NULL, ftype, 0, 0600)) == 0) {
|
|
/*
|
|
* Verify that we are opening the same file that we were
|
|
* referring to when we wrote this log record.
|
|
*/
|
|
memset(zeroid, 0, DB_FILE_ID_LEN);
|
|
if (memcmp(uid, dbp->fileid, DB_FILE_ID_LEN) == 0 ||
|
|
memcmp(dbp->fileid, zeroid, DB_FILE_ID_LEN) == 0) {
|
|
(void)CDB___log_add_logid(lp, dbp, ndx);
|
|
return (0);
|
|
}
|
|
}
|
|
(void)dbp->close(dbp, 0);
|
|
(void)CDB___log_add_logid(lp, NULL, ndx);
|
|
|
|
return (ENOENT);
|
|
}
|
|
|
|
/*
|
|
* CDB___log_add_logid --
|
|
* Adds a DB entry to the log's DB entry table.
|
|
*
|
|
* PUBLIC: int CDB___log_add_logid __P((DB_LOG *, DB *, u_int32_t));
|
|
*/
|
|
int
|
|
CDB___log_add_logid(logp, dbp, ndx)
|
|
DB_LOG *logp;
|
|
DB *dbp;
|
|
u_int32_t ndx;
|
|
{
|
|
u_int32_t i;
|
|
int ret;
|
|
|
|
ret = 0;
|
|
|
|
MUTEX_THREAD_LOCK(logp->mutexp);
|
|
|
|
/*
|
|
* Check if we need to grow the table. Note, ndx is 0-based (the
|
|
* index into the DB entry table) an dbentry_cnt is 1-based, the
|
|
* number of available slots.
|
|
*/
|
|
if (logp->dbentry_cnt <= ndx) {
|
|
if ((ret = CDB___os_realloc((ndx + DB_GROW_SIZE) * sizeof(DB_ENTRY),
|
|
NULL, &logp->dbentry)) != 0)
|
|
goto err;
|
|
|
|
/* Initialize the new entries. */
|
|
for (i = logp->dbentry_cnt; i < ndx + DB_GROW_SIZE; i++) {
|
|
logp->dbentry[i].count = 0;
|
|
logp->dbentry[i].dbp = NULL;
|
|
logp->dbentry[i].deleted = 0;
|
|
logp->dbentry[i].refcount = 0;
|
|
}
|
|
|
|
logp->dbentry_cnt = i;
|
|
}
|
|
|
|
if (logp->dbentry[ndx].deleted == 0 &&
|
|
logp->dbentry[ndx].dbp == NULL) {
|
|
logp->dbentry[ndx].count = 0;
|
|
logp->dbentry[ndx].dbp = dbp;
|
|
logp->dbentry[ndx].deleted = dbp == NULL;
|
|
logp->dbentry[ndx].refcount = 1;
|
|
} else
|
|
logp->dbentry[ndx].refcount++;
|
|
|
|
|
|
err: MUTEX_THREAD_UNLOCK(logp->mutexp);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* CDB___db_fileid_to_db --
|
|
* Return the DB corresponding to the specified fileid.
|
|
*
|
|
* PUBLIC: int CDB___db_fileid_to_db __P((DB_ENV *, DB **, int32_t, int));
|
|
*/
|
|
int
|
|
CDB___db_fileid_to_db(dbenv, dbpp, ndx, inc)
|
|
DB_ENV *dbenv;
|
|
DB **dbpp;
|
|
int32_t ndx;
|
|
int inc;
|
|
{
|
|
DB_LOG *logp;
|
|
FNAME *fname;
|
|
int ret;
|
|
char *name;
|
|
|
|
ret = 0;
|
|
logp = dbenv->lg_handle;
|
|
|
|
MUTEX_THREAD_LOCK(logp->mutexp);
|
|
|
|
/*
|
|
* Under XA, a process different than the one issuing DB operations
|
|
* may abort a transaction. In this case, recovery routines are run
|
|
* by a process that does not necessarily have the file open, so we
|
|
* we must open the file explicitly.
|
|
*/
|
|
if ((u_int32_t)ndx >= logp->dbentry_cnt ||
|
|
(!logp->dbentry[ndx].deleted && logp->dbentry[ndx].dbp == NULL)) {
|
|
if (CDB___log_lid_to_fname(logp, ndx, &fname) != 0) {
|
|
/* Couldn't find entry; this is a fatal error. */
|
|
ret = EINVAL;
|
|
goto err;
|
|
}
|
|
name = R_ADDR(&logp->reginfo, fname->name_off);
|
|
|
|
/*
|
|
* CDB___log_do_open is called without protection of the
|
|
* log thread lock.
|
|
*/
|
|
MUTEX_THREAD_UNLOCK(logp->mutexp);
|
|
|
|
/*
|
|
* At this point, we are not holding the thread lock, so exit
|
|
* directly instead of going through the exit code at the
|
|
* bottom. If the CDB___log_do_open succeeded, then we don't need
|
|
* to do any of the remaining error checking at the end of this
|
|
* routine.
|
|
*/
|
|
if ((ret = CDB___log_do_open(logp,
|
|
fname->ufid, name, fname->s_type, ndx)) != 0)
|
|
return (ret);
|
|
|
|
*dbpp = logp->dbentry[ndx].dbp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return DB_DELETED if the file has been deleted (it's not an error).
|
|
*/
|
|
if (logp->dbentry[ndx].deleted) {
|
|
ret = DB_DELETED;
|
|
if (inc)
|
|
logp->dbentry[ndx].count++;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Otherwise return 0, but if we don't have a corresponding DB, it's
|
|
* an error.
|
|
*/
|
|
if ((*dbpp = logp->dbentry[ndx].dbp) == NULL)
|
|
ret = ENOENT;
|
|
|
|
err: MUTEX_THREAD_UNLOCK(logp->mutexp);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Close files that were opened by the recovery daemon.
|
|
*
|
|
* PUBLIC: void CDB___log_close_files __P((DB_ENV *));
|
|
*/
|
|
void
|
|
CDB___log_close_files(dbenv)
|
|
DB_ENV *dbenv;
|
|
{
|
|
DB_ENTRY *dbe;
|
|
DB_LOG *logp;
|
|
u_int32_t i;
|
|
|
|
logp = dbenv->lg_handle;
|
|
MUTEX_THREAD_LOCK(logp->mutexp);
|
|
F_SET(logp, DBC_RECOVER);
|
|
for (i = 0; i < logp->dbentry_cnt; i++) {
|
|
dbe = &logp->dbentry[i];
|
|
if (dbe->dbp != NULL) {
|
|
(void)dbe->dbp->close(dbe->dbp, 0);
|
|
dbe->dbp = NULL;
|
|
}
|
|
dbe->deleted = 0;
|
|
dbe->refcount = 0;
|
|
}
|
|
F_CLR(logp, DBC_RECOVER);
|
|
MUTEX_THREAD_UNLOCK(logp->mutexp);
|
|
}
|
|
|
|
/*
|
|
* PUBLIC: void CDB___log_rem_logid __P((DB_LOG *, u_int32_t));
|
|
*/
|
|
void
|
|
CDB___log_rem_logid(logp, ndx)
|
|
DB_LOG *logp;
|
|
u_int32_t ndx;
|
|
{
|
|
MUTEX_THREAD_LOCK(logp->mutexp);
|
|
if (--logp->dbentry[ndx].refcount == 0) {
|
|
logp->dbentry[ndx].dbp = NULL;
|
|
logp->dbentry[ndx].deleted = 0;
|
|
}
|
|
MUTEX_THREAD_UNLOCK(logp->mutexp);
|
|
}
|
|
|
|
/*
|
|
* CDB___log_lid_to_fname --
|
|
* Traverse the shared-memory region looking for the entry that
|
|
* matches the passed log fileid. Returns 0 on success; -1 on error.
|
|
*/
|
|
static int
|
|
CDB___log_lid_to_fname(dblp, lid, fnamep)
|
|
DB_LOG *dblp;
|
|
int32_t lid;
|
|
FNAME **fnamep;
|
|
{
|
|
FNAME *fnp;
|
|
LOG *lp;
|
|
|
|
lp = dblp->reginfo.primary;
|
|
|
|
for (fnp = SH_TAILQ_FIRST(&lp->fq, __fname);
|
|
fnp != NULL; fnp = SH_TAILQ_NEXT(fnp, q, __fname)) {
|
|
if (fnp->ref == 0) /* Entry not in use. */
|
|
continue;
|
|
if (fnp->id == lid) {
|
|
*fnamep = fnp;
|
|
return (0);
|
|
}
|
|
}
|
|
return (-1);
|
|
}
|