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author | Ulrich Drepper <drepper@redhat.com> | 2000-01-02 06:01:06 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2000-01-02 06:01:06 +0000 |
commit | 8d6f1731fcd082e4f744ba9cb4bde4be7c08f1b3 (patch) | |
tree | 099a250d7366aef2ab028fdb24f0d692cd784b4a /db2/common/db_apprec.c | |
parent | 9a6450d578556c11e7c173d2f28362345b8f1258 (diff) | |
download | glibc-8d6f1731fcd082e4f744ba9cb4bde4be7c08f1b3.tar.gz glibc-8d6f1731fcd082e4f744ba9cb4bde4be7c08f1b3.tar.xz glibc-8d6f1731fcd082e4f744ba9cb4bde4be7c08f1b3.zip |
Update.
* Makeconfig (all-subdirs): Remove db and db2. * db/*: Removed. * db2/*: Removed.
Diffstat (limited to 'db2/common/db_apprec.c')
-rw-r--r-- | db2/common/db_apprec.c | 247 |
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); -} |