diff options
Diffstat (limited to 'debian/htdig/htdig-3.2.0b6/db/txn_rec.c')
| -rw-r--r-- | debian/htdig/htdig-3.2.0b6/db/txn_rec.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/debian/htdig/htdig-3.2.0b6/db/txn_rec.c b/debian/htdig/htdig-3.2.0b6/db/txn_rec.c new file mode 100644 index 00000000..dff60df7 --- /dev/null +++ b/debian/htdig/htdig-3.2.0b6/db/txn_rec.c @@ -0,0 +1,212 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1996, 1997, 1998, 1999 + * Sleepycat Software. All rights reserved. + */ +/* + * Copyright (c) 1996 + * The President and Fellows of Harvard University. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "db_config.h" + +#ifndef lint +static const char sccsid[] = "@(#)txn_rec.c 11.2 (Sleepycat) 9/9/99"; +#endif /* not lint */ + +#ifndef NO_SYSTEM_INCLUDES +#include <sys/types.h> + +#include <errno.h> +#endif + +#include "db_int.h" +#include "db_page.h" +#include "txn.h" +#include "db_am.h" + +/* + * PUBLIC: int CDB___txn_regop_recover + * PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *)); + * + * These records are only ever written for commits. + */ +int +CDB___txn_regop_recover(dbenv, dbtp, lsnp, redo, info) + DB_ENV *dbenv; + DBT *dbtp; + DB_LSN *lsnp; + int redo; + void *info; +{ + __txn_regop_args *argp; + int ret; + +#ifdef DEBUG_RECOVER + (void)CDB___txn_regop_print(dbenv, dbtp, lsnp, redo, info); +#endif + COMPQUIET(redo, 0); + COMPQUIET(dbenv, NULL); + + if ((ret = CDB___txn_regop_read(dbtp->data, &argp)) != 0) + return (ret); + + if (argp->opcode != TXN_COMMIT) + ret = EINVAL; + else + if (CDB___db_txnlist_find(info, argp->txnid->txnid) == DB_NOTFOUND) + ret = CDB___db_txnlist_add(info, argp->txnid->txnid); + + if (ret == 0) + *lsnp = argp->prev_lsn; + CDB___os_free(argp, 0); + + return (ret); +} + +/* + * PUBLIC: int CDB___txn_xa_regop_recover + * PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *)); + * + * These records are only ever written for prepares. + */ +int +CDB___txn_xa_regop_recover(dbenv, dbtp, lsnp, redo, info) + DB_ENV *dbenv; + DBT *dbtp; + DB_LSN *lsnp; + int redo; + void *info; +{ + __txn_xa_regop_args *argp; + int ret; + +#ifdef DEBUG_RECOVER + (void)CDB___txn_xa_regop_print(dbenv, dbtp, lsnp, redo, info); +#endif + COMPQUIET(redo, 0); + COMPQUIET(dbenv, NULL); + + if ((ret = CDB___txn_xa_regop_read(dbtp->data, &argp)) != 0) + return (ret); + + if (argp->opcode != TXN_PREPARE) + ret = EINVAL; + else + /* Call CDB___db_txnlist_find so that we update the maxid. */ + (void)CDB___db_txnlist_find(info, argp->txnid->txnid); + + if (ret == 0) + *lsnp = argp->prev_lsn; + CDB___os_free(argp, 0); + + return (ret); +} + +/* + * PUBLIC: int CDB___txn_ckp_recover __P((DB_ENV *, DBT *, DB_LSN *, int, void *)); + */ +int +CDB___txn_ckp_recover(dbenv, dbtp, lsnp, redo, info) + DB_ENV *dbenv; + DBT *dbtp; + DB_LSN *lsnp; + int redo; + void *info; +{ + __txn_ckp_args *argp; + int ret; + +#ifdef DEBUG_RECOVER + CDB___txn_ckp_print(dbenv, dbtp, lsnp, redo, info); +#endif + COMPQUIET(dbenv, NULL); + + if ((ret = CDB___txn_ckp_read(dbtp->data, &argp)) != 0) + return (ret); + + /* + * Check for 'restart' checkpoint record. This occurs when the + * checkpoint lsn is equal to the lsn of the checkpoint record + * and means that we could set the transaction ID back to 1, so + * that we don't exhaust the transaction ID name space. + */ + if (argp->ckp_lsn.file == lsnp->file && + argp->ckp_lsn.offset == lsnp->offset) + CDB___db_txnlist_gen(info, redo ? -1 : 1); + + *lsnp = argp->last_ckp; + CDB___os_free(argp, 0); + return (DB_TXN_CKP); +} + +/* + * CDB___txn_child_recover + * Recover a commit record for a child transaction. + * + * PUBLIC: int CDB___txn_child_recover + * PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *)); + */ +int +CDB___txn_child_recover(dbenv, dbtp, lsnp, redo, info) + DB_ENV *dbenv; + DBT *dbtp; + DB_LSN *lsnp; + int redo; + void *info; +{ + __txn_child_args *argp; + int ret; + +#ifdef DEBUG_RECOVER + (void)CDB___txn_child_print(dbenv, dbtp, lsnp, redo, info); +#endif + COMPQUIET(redo, 0); + COMPQUIET(dbenv, NULL); + + if ((ret = CDB___txn_child_read(dbtp->data, &argp)) != 0) + return (ret); + + /* + * We count the child as committed only if its parent committed. + * So, if we are not yet in the transaction list, but our parent + * is, then we should go ahead and commit. + */ + if (argp->opcode != TXN_COMMIT) + ret = EINVAL; + else + if (CDB___db_txnlist_find(info, argp->parent) == 0 && + CDB___db_txnlist_find(info, argp->txnid->txnid) == DB_NOTFOUND) + ret = CDB___db_txnlist_add(info, argp->txnid->txnid); + + if (ret == 0) + *lsnp = argp->prev_lsn; + CDB___os_free(argp, 0); + + return (ret); +} |