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-rw-r--r--db2/common/db_apprec.c247
1 files changed, 0 insertions, 247 deletions
diff --git a/db2/common/db_apprec.c b/db2/common/db_apprec.c
deleted file mode 100644
index 5e8fec4659..0000000000
--- a/db2/common/db_apprec.c
+++ /dev/null
@@ -1,247 +0,0 @@
-/*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996, 1997, 1998
- * Sleepycat Software. All rights reserved.
- */
-
-#include "config.h"
-
-#ifndef lint
-static const char copyright[] =
-"@(#) Copyright (c) 1996, 1997, 1998\n\
- Sleepycat Software Inc. All rights reserved.\n";
-static const char sccsid[] = "@(#)db_apprec.c 10.33 (Sleepycat) 10/5/98";
-#endif
-
-#ifndef NO_SYSTEM_INCLUDES
-#include <sys/types.h>
-
-#include <errno.h>
-#include <string.h>
-#include <time.h>
-#endif
-
-#include "db_int.h"
-#include "shqueue.h"
-#include "db_page.h"
-#include "db_dispatch.h"
-#include "db_am.h"
-#include "log.h"
-#include "txn.h"
-#include "common_ext.h"
-
-/*
- * __db_apprec --
- * Perform recovery.
- *
- * PUBLIC: int __db_apprec __P((DB_ENV *, u_int32_t));
- */
-int
-__db_apprec(dbenv, flags)
- DB_ENV *dbenv;
- u_int32_t flags;
-{
- DBT data;
- DB_LOG *lp;
- DB_LSN ckp_lsn, first_lsn, lsn, open_lsn;
- __txn_ckp_args *ckp_args;
- time_t now;
- u_int32_t is_thread;
- int ret;
- void *txninfo;
-
- lp = dbenv->lg_info;
-
- /* Initialize the transaction list. */
- if ((ret = __db_txnlist_init(&txninfo)) != 0)
- return (ret);
-
- /*
- * Save the state of the thread flag -- we don't need it on at the
- * moment because we're single-threaded until recovery is complete.
- */
- is_thread = F_ISSET(lp, DB_AM_THREAD);
- F_CLR(lp, DB_AM_THREAD);
-
- /*
- * Recovery is done in three passes:
- * Pass #0:
- * We need to find the position from which we will open files
- * We need to open files beginning with the last to next
- * checkpoint because we might have crashed after writing the
- * last checkpoint record, but before having written out all
- * the open file information.
- * Pass #1:
- * Read forward through the log from the second to last checkpoint
- * opening and closing files so that at the end of the log we have
- * the "current" set of files open.
- * Pass #2:
- * Read backward through the log undoing any uncompleted TXNs.
- * If doing catastrophic recovery, we read to the beginning of
- * the log, otherwise, to the most recent checkpoint that occurs
- * before the most recent checkpoint LSN, which is returned by
- * __log_findckp(). During this pass, checkpoint file information
- * is ignored, and file openings and closings are undone.
- * Pass #3:
- * Read forward through the log from the LSN found in pass #2,
- * redoing any committed TXNs. During this pass, checkpoint
- * file information is ignored, and file openings and closings
- * are redone.
- */
-
- /*
- * Find the second to last checkpoint in the log. This is the point
- * from which we want to begin pass #1 (the TXN_OPENFILES pass).
- */
- memset(&data, 0, sizeof(data));
- ckp_args = NULL;
-
- if ((ret = log_get(lp, &ckp_lsn, &data, DB_CHECKPOINT)) != 0) {
- /*
- * If we don't find a checkpoint, start from the beginning.
- * If that fails, we're done. Note, we do not require that
- * there be log records if we're performing recovery.
- */
-first: if ((ret = log_get(lp, &ckp_lsn, &data, DB_FIRST)) != 0) {
- if (ret == DB_NOTFOUND)
- ret = 0;
- else
- __db_err(dbenv, "First log record not found");
- goto out;
- }
- open_lsn = ckp_lsn;
- } else if ((ret = __txn_ckp_read(data.data, &ckp_args)) != 0) {
- __db_err(dbenv, "Invalid checkpoint record at [%ld][%ld]\n",
- (u_long)ckp_lsn.file, (u_long)ckp_lsn.offset);
- goto out;
- } else if (IS_ZERO_LSN(ckp_args->last_ckp) ||
- (ret = log_get(lp, &ckp_args->last_ckp, &data, DB_SET)) != 0)
- goto first;
- else
- open_lsn = ckp_args->last_ckp;
-
- /*
- * Now, ckp_lsn is either the lsn of the last checkpoint or the lsn
- * of the first record in the log. Open_lsn is the second to last
- * checkpoint or the beinning of the log; begin the TXN_OPENFILES
- * pass from that lsn, and proceed to the end of the log.
- */
- lsn = open_lsn;
- for (;;) {
- if (dbenv->tx_recover != NULL)
- ret = dbenv->tx_recover(lp,
- &data, &lsn, TXN_OPENFILES, txninfo);
- else
- ret = __db_dispatch(lp,
- &data, &lsn, TXN_OPENFILES, txninfo);
- if (ret != 0 && ret != DB_TXN_CKP)
- goto msgerr;
- if ((ret = log_get(lp, &lsn, &data, DB_NEXT)) != 0) {
- if (ret == DB_NOTFOUND)
- break;
- goto out;
- }
- }
-
- /*
- * Pass #2.
- *
- * Before we can begin pass #2, backward roll phase, we determine how
- * far back in the log to recover. If we are doing catastrophic
- * recovery, then we go as far back as we have files. If we are
- * doing normal recovery, we go as back to the most recent checkpoint
- * that occurs before the most recent checkpoint LSN.
- */
- if (LF_ISSET(DB_RECOVER_FATAL)) {
- ZERO_LSN(first_lsn);
- } else
- if ((ret = __log_findckp(lp, &first_lsn)) == DB_NOTFOUND) {
- /*
- * We don't require that log files exist if recovery
- * was specified.
- */
- ret = 0;
- goto out;
- }
-
- if (dbenv->db_verbose)
- __db_err(lp->dbenv, "Recovery starting from [%lu][%lu]",
- (u_long)first_lsn.file, (u_long)first_lsn.offset);
-
- 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)) {
- if (dbenv->tx_recover != NULL)
- ret = dbenv->tx_recover(lp,
- &data, &lsn, TXN_BACKWARD_ROLL, txninfo);
- else
- ret = __db_dispatch(lp,
- &data, &lsn, TXN_BACKWARD_ROLL, txninfo);
- if (ret != 0) {
- if (ret != DB_TXN_CKP)
- goto msgerr;
- else
- ret = 0;
- }
- }
- if (ret != 0 && ret != DB_NOTFOUND)
- goto out;
-
- /*
- * Pass #3.
- */
- for (ret = log_get(lp, &lsn, &data, DB_NEXT);
- ret == 0; ret = log_get(lp, &lsn, &data, DB_NEXT)) {
- if (dbenv->tx_recover != NULL)
- ret = dbenv->tx_recover(lp,
- &data, &lsn, TXN_FORWARD_ROLL, txninfo);
- else
- ret = __db_dispatch(lp,
- &data, &lsn, TXN_FORWARD_ROLL, txninfo);
- if (ret != 0) {
- if (ret != DB_TXN_CKP)
- goto msgerr;
- else
- ret = 0;
- }
- }
- if (ret != DB_NOTFOUND)
- goto out;
-
- /* Now close all the db files that are open. */
- __log_close_files(lp);
-
- /*
- * Now set the last checkpoint lsn and the current time,
- * take a checkpoint, and reset the txnid.
- */
- (void)time(&now);
- dbenv->tx_info->region->last_ckp = ckp_lsn;
- dbenv->tx_info->region->time_ckp = (u_int32_t)now;
- if ((ret = txn_checkpoint(dbenv->tx_info, 0, 0)) != 0)
- goto out;
- dbenv->tx_info->region->last_txnid = TXN_MINIMUM;
-
- if (dbenv->db_verbose) {
- __db_err(lp->dbenv, "Recovery complete at %.24s", ctime(&now));
- __db_err(lp->dbenv, "%s %lx %s [%lu][%lu]",
- "Maximum transaction id",
- ((DB_TXNHEAD *)txninfo)->maxid,
- "Recovery checkpoint",
- (u_long)dbenv->tx_info->region->last_ckp.file,
- (u_long)dbenv->tx_info->region->last_ckp.offset);
- }
-
- if (0) {
-msgerr: __db_err(dbenv, "Recovery function for LSN %lu %lu failed",
- (u_long)lsn.file, (u_long)lsn.offset);
- }
-
-out: F_SET(lp, is_thread);
- __db_txnlist_end(txninfo);
- if (ckp_args != NULL)
- __os_free(ckp_args, sizeof(*ckp_args));
-
- return (ret);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 06:32:52 +0000