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Diffstat (limited to 'db2/common/db_apprec.c')
-rw-r--r--db2/common/db_apprec.c98
1 files changed, 65 insertions, 33 deletions
diff --git a/db2/common/db_apprec.c b/db2/common/db_apprec.c
index b22b0c5e9a..2e94673731 100644
--- a/db2/common/db_apprec.c
+++ b/db2/common/db_apprec.c
@@ -11,7 +11,7 @@
static const char copyright[] =
"@(#) Copyright (c) 1997\n\
Sleepycat Software Inc. All rights reserved.\n";
-static const char sccsid[] = "@(#)db_apprec.c 10.15 (Sleepycat) 7/27/97";
+static const char sccsid[] = "@(#)db_apprec.c 10.16 (Sleepycat) 8/27/97";
#endif
#ifndef NO_SYSTEM_INCLUDES
@@ -19,6 +19,7 @@ static const char sccsid[] = "@(#)db_apprec.c 10.15 (Sleepycat) 7/27/97";
#include <time.h>
#include <string.h>
+#include <stdlib.h>
#endif
#include "db_int.h"
@@ -30,6 +31,12 @@ static const char sccsid[] = "@(#)db_apprec.c 10.15 (Sleepycat) 7/27/97";
#include "txn.h"
#include "common_ext.h"
+#define FREE_DBT(L, D) { \
+ if (F_ISSET((L), DB_AM_THREAD) && (D).data != NULL) \
+ free((D).data); \
+ (D).data = NULL; \
+ } \
+
/*
* __db_apprec --
* Perform recovery.
@@ -45,30 +52,34 @@ __db_apprec(dbenv, flags)
DB_LOG *lp;
DB_LSN ckp_lsn, first_lsn, lsn, tmp_lsn;
time_t now;
- int first_flag, ret, tret;
+ int first_flag, ret;
void *txninfo;
- ZERO_LSN(ckp_lsn);
-
/* Initialize the transaction list. */
if ((ret = __db_txnlist_init(&txninfo)) != 0)
return (ret);
/*
- * Read forward through the log opening the appropriate files
- * so that we can call recovery routines. In general, we start
- * at the last checkpoint prior to the last checkpointed LSN.
- * For catastrophic recovery, we begin at the first LSN that
- * appears in any log file (log figures this out for us when
- * we pass it the DB_FIRST flag).
+ * Read forward through the log, opening the appropriate files so that
+ * we can call recovery routines. In general, we start at the last
+ * checkpoint prior to the last checkpointed LSN. For catastrophic
+ * recovery, we begin at the first LSN that appears in any log file
+ * (log_get figures this out for us when we pass it the DB_FIRST flag).
*/
lp = dbenv->lg_info;
if (LF_ISSET(DB_RECOVER_FATAL))
first_flag = DB_FIRST;
- else
- first_flag = __log_findckp(lp, &lsn) != 0 ? DB_FIRST : DB_SET;
+ else {
+ if ((ret = __log_findckp(lp, &lsn)) == DB_NOTFOUND)
+ return (0);
+ first_flag = DB_SET;
+ }
+ /* If we're a threaded application, we have to allocate space. */
memset(&data, 0, sizeof(data));
+ if (F_ISSET(lp, DB_AM_THREAD))
+ F_SET(&data, DB_DBT_MALLOC);
+
if ((ret = log_get(lp, &lsn, &data, first_flag)) != 0) {
__db_err(dbenv, "Failure: unable to get log record");
if (first_flag == DB_SET)
@@ -80,35 +91,55 @@ __db_apprec(dbenv, flags)
}
first_lsn = lsn;
- for (; ret == 0;
- ret = log_get(dbenv->lg_info, &lsn, &data, DB_NEXT))
- if ((tret = __db_dispatch(lp,
- &data, &lsn, TXN_OPENFILES, txninfo)) < 0) {
- ret = tret;
+ for (;;) {
+ ret = __db_dispatch(lp, &data, &lsn, TXN_OPENFILES, txninfo);
+ FREE_DBT(lp, data);
+ if (ret != 0 && ret != DB_TXN_CKP)
goto msgerr;
+ if ((ret =
+ log_get(dbenv->lg_info, &lsn, &data, DB_NEXT)) != 0) {
+ if (ret != DB_NOTFOUND)
+ goto err;
+ break;
}
+ }
+ FREE_DBT(lp, data);
+ /*
+ * Initialize the ckp_lsn to 0,0. If we never find a valid
+ * checkpoint in the log, then leaving ckp_lsn at 0,0 is correct.
+ */
+ ZERO_LSN(ckp_lsn);
for (ret = log_get(lp, &lsn, &data, DB_LAST);
ret == 0 && log_compare(&lsn, &first_lsn) > 0;
ret = log_get(lp,&lsn, &data, DB_PREV)) {
tmp_lsn = lsn;
- tret =
- __db_dispatch(lp, &data, &lsn, TXN_BACKWARD_ROLL, txninfo);
- if (IS_ZERO_LSN(ckp_lsn) && tret > 0)
- ckp_lsn = tmp_lsn;
- if (tret < 0) {
- ret = tret;
+ ret = __db_dispatch(lp,
+ &data, &lsn, TXN_BACKWARD_ROLL, txninfo);
+ FREE_DBT(lp, data);
+ if (ret == DB_TXN_CKP) {
+ if (IS_ZERO_LSN(ckp_lsn))
+ ckp_lsn = tmp_lsn;
+ ret = 0;
+ } else if (ret != 0)
goto msgerr;
- }
}
+ FREE_DBT(lp, data);
+ if (ret != 0 && ret != DB_NOTFOUND)
+ goto err;
for (ret = log_get(lp, &lsn, &data, DB_NEXT);
- ret == 0; ret = log_get(lp, &lsn, &data, DB_NEXT))
- if ((tret = __db_dispatch(lp,
- &data, &lsn, TXN_FORWARD_ROLL, txninfo)) < 0) {
- ret = tret;
+ ret == 0; ret = log_get(lp, &lsn, &data, DB_NEXT)) {
+ ret = __db_dispatch(lp, &data, &lsn, TXN_FORWARD_ROLL, txninfo);
+ FREE_DBT(lp, data);
+ if (ret == DB_TXN_CKP)
+ ret = 0;
+ else if (ret != 0)
goto msgerr;
- }
+ }
+ FREE_DBT(lp, data);
+ if (ret != DB_NOTFOUND)
+ goto err;
/* Now close all the db files that are open. */
__log_close_files(lp);
@@ -118,11 +149,11 @@ __db_apprec(dbenv, flags)
* and the current time. Then take a checkpoint.
*/
(void)time(&now);
-
dbenv->tx_info->region->last_txnid = ((__db_txnhead *)txninfo)->maxid;
dbenv->tx_info->region->last_ckp = ckp_lsn;
- dbenv->tx_info->region->time_ckp = (u_int32_t) now;
- txn_checkpoint(dbenv->tx_info, 0, 0);
+ dbenv->tx_info->region->time_ckp = (u_int32_t)now;
+ if ((ret = txn_checkpoint(dbenv->tx_info, 0, 0)) != 0)
+ goto err;
if (dbenv->db_verbose) {
__db_err(lp->dbenv, "Recovery complete at %s", ctime(&now));
@@ -139,5 +170,6 @@ __db_apprec(dbenv, flags)
msgerr: __db_err(dbenv, "Recovery function for LSN %lu %lu failed",
(u_long)lsn.file, (u_long)lsn.offset);
-err: return (ret);
+err: FREE_DBT(lp, data);
+ return (ret);
}