diff options
Diffstat (limited to 'db2/common/db_apprec.c')
| -rw-r--r-- | db2/common/db_apprec.c | 98 |
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); } |