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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-pink 1.4.1 (git 2.36.1) at 2024-11-04 14:11:39 +0000