db2/txn/txn_rec.c

   1 /*-
   2  * See the file LICENSE for redistribution information.
   3  *
   4  * Copyright (c) 1996, 1997
   5  *      Sleepycat Software.  All rights reserved.
   6  */
   7 /*
   8  * Copyright (c) 1996
   9  *      The President and Fellows of Harvard University.  All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  */
  39
  40 #include "config.h"
  41
  42 #ifndef lint
  43 static const char sccsid[] = "@(#)txn_rec.c     10.6 (Sleepycat) 10/25/97";
  44 #endif /* not lint */
  45
  46 #ifndef NO_SYSTEM_INCLUDES
  47 #include <sys/types.h>
  48
  49 #include <stddef.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #endif
  53
  54 #include "db_int.h"
  55 #include "db_page.h"
  56 #include "shqueue.h"
  57 #include "txn.h"
  58 #include "db_dispatch.h"
  59 #include "db_am.h"
  60 #include "common_ext.h"
  61
  62 /*
  63  * PUBLIC: int __txn_regop_recover
  64  * PUBLIC:     __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
  65  */
  66 int
  67 __txn_regop_recover(logp, dbtp, lsnp, redo, info)
  68         DB_LOG *logp;
  69         DBT *dbtp;
  70         DB_LSN *lsnp;
  71         int redo;
  72          void *info;
  73 {
  74         __txn_regop_args *argp;
  75         int ret;
  76
  77 #ifdef DEBUG_RECOVER
  78         (void)__txn_regop_print(logp, dbtp, lsnp, redo, info);
  79 #endif
  80         logp = logp;                    /* XXX: Shut the compiler up. */
  81         redo = redo;
  82
  83         if ((ret = __txn_regop_read(dbtp->data, &argp)) != 0)
  84                 return (ret);
  85
  86         switch (argp->opcode) {
  87         case TXN_COMMIT:
  88                 if (__db_txnlist_find(info,
  89                     argp->txnid->txnid) == DB_NOTFOUND)
  90                         __db_txnlist_add(info, argp->txnid->txnid);
  91                 break;
  92         case TXN_PREPARE:       /* Nothing to do. */
  93         case TXN_BEGIN:
  94                 /* Call find so that we update the maxid. */
  95                 (void)__db_txnlist_find(info, argp->txnid->txnid);
  96                 break;
  97         }
  98
  99         *lsnp = argp->prev_lsn;
 100         __db_free(argp);
 101         return (0);
 102 }
 103
 104 /*
 105  * PUBLIC: int __txn_ckp_recover __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
 106  */
 107 int
 108 __txn_ckp_recover(logp, dbtp, lsnp, redo, info)
 109         DB_LOG *logp;
 110         DBT *dbtp;
 111         DB_LSN *lsnp;
 112         int redo;
 113         void *info;
 114 {
 115         __txn_ckp_args *argp;
 116         int ret;
 117
 118 #ifdef DEBUG_RECOVER
 119         __txn_ckp_print(logp, dbtp, lsnp, redo, info);
 120 #endif
 121         logp = logp;                    /* XXX: Shut the compiler up. */
 122         redo = redo;
 123         info = info;
 124
 125         if ((ret = __txn_ckp_read(dbtp->data, &argp)) != 0)
 126                 return (ret);
 127
 128         *lsnp = argp->last_ckp;
 129         __db_free(argp);
 130         return (DB_TXN_CKP);
 131 }