glibc/db2/db/db_rec.c

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Update. 1997-08-10 19:17 Philip Blundell <Philip.Blundell@pobox.com> * nss/nss_db/db-XXX.c: Include <db_185.h> not <db.h>. Somebody should update this to use the new db API. * nss/nss_db/db-netgrp.c: Likewise. * nss/nss_db/db-alias.c: Likewise. * db2/Makefile: Makefile for db-2.x in glibc. 1997-08-27 21:20 Ulrich Drepper <drepper@cygnus.com> * csu/Makefile (before-compile): New goal. Make sure abi-tag.h is generated. [$(elf)=yes] (asm-CPPFLAGS): Make sure abi-tag.h file can be found. * Makeconfig [$(build-omitfp)=yes] (CFLAGS-.o): Add -D__USE_STRING_INLINES. * string/string.f: Move strnlen optimization after inclusion of <bits/string.h>. Include <bits/string.h> only if __USE_STRING_INLINES is defined. * sysdeps/generic/memcpy.c: Undef memcpy to allow macro of this name in <bits/string.h>. * sysdeps/generic/memset.c: Likewise. * sysdeps/i386/string.h: i386 optimized string functions. * sysdeps/i386/i486string.h: i486+ optimized string functions. * Makefile (subdirs): Change db to db2. * shlib-versions: Bump libdb verion number to 3. * include/db.h: Include from db2 directory. * include/db_185.h: New file. * sysdeps/i386/Makefile [$(subdirs)=db2] (CPPFLAGS): Add macros to provide spinlock information for db2. * sysdeps/m68k/m68020/Makefile: New file. Likewise. * sysdeps/sparc/Makefile: New file. Likewise. * sysdeps/unix/sysv/linux/Makefile [$(subdirs)=db2] (CPPFLAGS): Add -DHAVE_LLSEEK. * db2/config.h: Hand-edited config file for db2 in glibc. * db2/compat.h: New file from db-2.3.4. * db2/db.h: Likewise. * db2/db_185.h: Likewise. * db2/db_int.h: Likewise. * db2/makedb.c: Likewise. * db2/btree/bt_close.c: Likewise. * db2/btree/bt_compare.c: Likewise. * db2/btree/bt_conv.c: Likewise. * db2/btree/bt_cursor.c: Likewise. * db2/btree/bt_delete.c: Likewise. * db2/btree/bt_open.c: Likewise. * db2/btree/bt_page.c: Likewise. * db2/btree/bt_put.c: Likewise. * db2/btree/bt_rec.c: Likewise. * db2/btree/bt_recno.c: Likewise. * db2/btree/btree_auto.c: Likewise. * db2/btree/bt_rsearch.c: Likewise. * db2/btree/bt_search.c: Likewise. * db2/btree/bt_split.c: Likewise. * db2/btree/bt_stat.c: Likewise. * db2/btree/btree.src: Likewise. * db2/common/db_appinit.c: Likewise. * db2/common/db_err.c: Likewise. * db2/common/db_byteorder.c: Likewise. * db2/common/db_apprec.c: Likewise. * db2/common/db_salloc.c: Likewise. * db2/common/db_log2.c: Likewise. * db2/common/db_region.c: Likewise. * db2/common/db_shash.c: Likewise. * db2/db/db.c: Likewise. * db2/db/db.src: Likewise. * db2/db/db_conv.c: Likewise. * db2/db/db_dispatch.c: Likewise. * db2/db/db_dup.c: Likewise. * db2/db/db_overflow.c: Likewise. * db2/db/db_pr.c: Likewise. * db2/db/db_rec.c: Likewise. * db2/db/db_ret.c: Likewise. * db2/db/db_thread.c: Likewise. * db2/db/db_auto.c: Likewise. * db2/db185/db185.c: Likewise. * db2/db185/db185_int.h: Likewise. * db2/dbm/dbm.c: Likewise. * db2/hash/hash.c: Likewise. * db2/hash/hash.src: Likewise. * db2/hash/hash_page.c: Likewise. * db2/hash/hash_conv.c: Likewise. * db2/hash/hash_debug.c: Likewise. * db2/hash/hash_stat.c: Likewise. * db2/hash/hash_rec.c: Likewise. * db2/hash/hash_dup.c: Likewise. * db2/hash/hash_func.c: Likewise. * db2/hash/hash_auto.c: Likewise. * db2/include/mp.h: Likewise. * db2/include/btree.h: Likewise. * db2/include/db.h.src: Likewise. * db2/include/db_int.h.src: Likewise. * db2/include/db_shash.h: Likewise. * db2/include/db_swap.h: Likewise. * db2/include/db_185.h.src: Likewise. * db2/include/txn.h: Likewise. * db2/include/db_am.h: Likewise. * db2/include/shqueue.h: Likewise. * db2/include/hash.h: Likewise. * db2/include/db_dispatch.h: Likewise. * db2/include/lock.h: Likewise. * db2/include/db_page.h: Likewise. * db2/include/log.h: Likewise. * db2/include/db_auto.h: Likewise. * db2/include/btree_auto.h: Likewise. * db2/include/hash_auto.h: Likewise. * db2/include/log_auto.h: Likewise. * db2/include/txn_auto.h: Likewise. * db2/include/db_ext.h: Likewise. * db2/include/btree_ext.h: Likewise. * db2/include/clib_ext.h: Likewise. * db2/include/common_ext.h: Likewise. * db2/include/hash_ext.h: Likewise. * db2/include/lock_ext.h: Likewise. * db2/include/log_ext.h: Likewise. * db2/include/mp_ext.h: Likewise. * db2/include/mutex_ext.h: Likewise. * db2/include/os_ext.h: Likewise. * db2/include/txn_ext.h: Likewise. * db2/include/cxx_int.h: Likewise. * db2/include/db_cxx.h: Likewise. * db2/include/queue.h: Likewise. * db2/lock/lock.c: Likewise. * db2/lock/lock_conflict.c: Likewise. * db2/lock/lock_util.c: Likewise. * db2/lock/lock_deadlock.c: Likewise. * db2/log/log.c: Likewise. * db2/log/log_get.c: Likewise. * db2/log/log.src: Likewise. * db2/log/log_compare.c: Likewise. * db2/log/log_put.c: Likewise. * db2/log/log_rec.c: Likewise. * db2/log/log_archive.c: Likewise. * db2/log/log_register.c: Likewise. * db2/log/log_auto.c: Likewise. * db2/log/log_findckp.c: Likewise. * db2/mp/mp_bh.c: Likewise. * db2/mp/mp_fget.c: Likewise. * db2/mp/mp_fopen.c: Likewise. * db2/mp/mp_fput.c: Likewise. * db2/mp/mp_fset.c: Likewise. * db2/mp/mp_open.c: Likewise. * db2/mp/mp_region.c: Likewise. * db2/mp/mp_pr.c: Likewise. * db2/mp/mp_sync.c: Likewise. * db2/mutex/68020.gcc: Likewise. * db2/mutex/mutex.c: Likewise. * db2/mutex/README: Likewise. * db2/mutex/x86.gcc: Likewise. * db2/mutex/sparc.gcc: Likewise. * db2/mutex/uts4.cc.s: Likewise. * db2/mutex/alpha.dec: Likewise. * db2/mutex/alpha.gcc: Likewise. * db2/mutex/parisc.gcc: Likewise. * db2/mutex/parisc.hp: Likewise. * db2/os/db_os_abs.c: Likewise. * db2/os/db_os_dir.c: Likewise. * db2/os/db_os_fid.c: Likewise. * db2/os/db_os_lseek.c: Likewise. * db2/os/db_os_mmap.c: Likewise. * db2/os/db_os_open.c: Likewise. * db2/os/db_os_rw.c: Likewise. * db2/os/db_os_sleep.c: Likewise. * db2/os/db_os_stat.c: Likewise. * db2/os/db_os_unlink.c: Likewise. * db2/txn/txn.c: Likewise. * db2/txn/txn.src: Likewise. * db2/txn/txn_rec.c: Likewise. * db2/txn/txn_auto.c: Likewise. * db2/clib/getlong.c: Likewise. * db2/progs/db_archive/db_archive.c: Likewise. * db2/progs/db_checkpoint/db_checkpoint.c: Likewise. * db2/progs/db_deadlock/db_deadlock.c: Likewise. * db2/progs/db_dump/db_dump.c: Likewise. * db2/progs/db_dump185/db_dump185.c: Likewise. * db2/progs/db_load/db_load.c: Likewise. * db2/progs/db_printlog/db_printlog.c: Likewise. * db2/progs/db_recover/db_recover.c: Likewise. * db2/progs/db_stat/db_stat.c: Likewise. * libio/stdio.h [__cplusplus] (__STDIO_INLINE): Define as inline. * po/de.po, po/sv.po: Update from 2.0.5 translations. * sysdeps/unix/sysv/linux/netinet/tcp.h: Pretty print. * sunrpc/rpc/xdr.h (XDR): Don't define argument of x_destroy callback as const. * sunrpc/xdr_mem.c (xdrmem_destroy): Don't define argument as const. * sunrpx/xdr_rec.c (xdrrec_destroy): Likewise. * sunrpx/xdr_stdio.c (xdrstdio_destroy): Likewise. 1997-08-27 18:47 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/if_index.c: Include <errno.h>. Reported by Benjamin Kosnik <bkoz@cygnus.com>. 1997-08-27 02:27 Roland McGrath <roland@baalperazim.frob.com> * abi-tags: New file. * csu/Makefile (distribute): Remove abi-tag.h. ($(objpfx)abi-tag.h): New target. * Makefile (distribute): Add abi-tags. * sysdeps/unix/sysv/linux/abi-tag.h: File removed. * sysdeps/mach/hurd/abi-tag.h: File removed. * sysdeps/stub/abi-tag.h: File removed. 1997-08-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/make-syscalls.sh: Change output so that it generates compilation rules only for the currently selected object suffixes. 1997-08-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/dl-machine.h (RTLD_START): Switch back to previous section to avoid confusing the compiler. * sysdeps/alpha/dl-machine.h (RTLD_START): Likewise. * sysdeps/i386/dl-machine.h (RTLD_START): Likewise. * sysdeps/mips/dl-machine.h (RTLD_START): Likewise. * sysdeps/mips/mips64/dl-machine.h (RTLD_START): Likewise. * sysdeps/sparc/sparc32/dl-machine.h (RTLD_START): Likewise. * sysdeps/m68k/dl-machine.h (elf_machine_load_address): Use a GOT relocation instead of a constant to avoid text relocation. (ELF_MACHINE_BEFORE_RTLD_RELOC): Removed. (RTLD_START): Declare global labels as functions and add size directive. 1997-08-25 17:01 Ulrich Drepper <drepper@cygnus.com> * sysdeps/i386/bits/select.h: Correct assembler versions to work even for descriptors >= 32. * stdlib/alloca.h: Don't define alloca to __alloca since if gcc is used __alloca is not defined to __builtin_alloca and so might not be available. Reported by Uwe Ohse <uwe@ohse.de>. * sysdeps/unix/sysv/linux/sys/sysmacros.h: Define macros in a special way if gcc is not used and so dev_t is an array. Reported by Uwe Ohse <uwe@ohse.de>. 1997-08-23 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * manual/libc.texinfo: Reorder chapters to match logical order. 1997-08-25 12:22 Ulrich Drepper <drepper@cygnus.com> * sunrpc/rpc/xdr.h: Change name of parameters in prototypes of xdr_reference, xdrmem_create, and xdrstdio_create because of clash with g++ internal symbols. Patch by Sudish Joseph <sj@eng.mindspring.net>. * elf/dl-deps.c: Implement handling of DT_FILTER.
1997-08-27 20:26:10 +00:00
/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 1997
* Sleepycat Software. All rights reserved.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)db_rec.c 10.8 (Sleepycat) 8/22/97";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#endif
#include <ctype.h>
#include <errno.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "db_int.h"
#include "shqueue.h"
#include "db_page.h"
#include "db_dispatch.h"
#include "log.h"
#include "hash.h"
#include "btree.h"
/*
* PUBLIC: int __db_addrem_recover
* PUBLIC: __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
*
* This log message is generated whenever we add or remove a duplicate
* to/from a duplicate page. On recover, we just do the opposite.
*/
int
__db_addrem_recover(logp, dbtp, lsnp, redo, info)
DB_LOG *logp;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__db_addrem_args *argp;
DB *file_dbp, *mdbp;
DB_MPOOLFILE *mpf;
PAGE *pagep;
int change, cmp_n, cmp_p, ret;
REC_PRINT(__db_addrem_print);
REC_INTRO(__db_addrem_read);
if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
if (!redo) {
/*
* We are undoing and the page doesn't exist. That
* is equivalent to having a pagelsn of 0, so we
* would not have to undo anything. In this case,
* don't bother creating a page.
*/
*lsnp = argp->prev_lsn;
ret = 0;
goto out;
} else
if ((ret = memp_fget(mpf,
&argp->pgno, DB_MPOOL_CREATE, &pagep)) != 0)
goto out;
}
cmp_n = log_compare(lsnp, &LSN(pagep));
cmp_p = log_compare(&LSN(pagep), &argp->pagelsn);
change = 0;
if ((cmp_p == 0 && redo && argp->opcode == DB_ADD_DUP) ||
(cmp_n == 0 && !redo && argp->opcode == DB_REM_DUP)) {
/* Need to redo an add, or undo a delete. */
if ((ret = __db_pitem(file_dbp, pagep, argp->indx, argp->nbytes,
argp->hdr.size == 0 ? NULL : &argp->hdr,
argp->dbt.size == 0 ? NULL : &argp->dbt)) != 0)
goto out;
change = DB_MPOOL_DIRTY;
} else if ((cmp_n == 0 && !redo && argp->opcode == DB_ADD_DUP) ||
(cmp_p == 0 && redo && argp->opcode == DB_REM_DUP)) {
/* Need to undo an add, or redo a delete. */
if ((ret = __db_ditem(file_dbp, pagep, argp->indx,
argp->nbytes)) != 0)
goto out;
change = DB_MPOOL_DIRTY;
}
if (change)
if (redo)
LSN(pagep) = *lsnp;
else
LSN(pagep) = argp->pagelsn;
if ((ret = memp_fput(mpf, pagep, change)) == 0)
*lsnp = argp->prev_lsn;
out: REC_CLOSE;
}
/*
* PUBLIC: int __db_split_recover __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
*/
int
__db_split_recover(logp, dbtp, lsnp, redo, info)
DB_LOG *logp;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__db_split_args *argp;
DB *file_dbp, *mdbp;
DB_MPOOLFILE *mpf;
PAGE *pagep;
int change, cmp_n, cmp_p, ret;
REC_PRINT(__db_split_print);
REC_INTRO(__db_split_read);
if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
if (!redo) {
/*
* We are undoing and the page doesn't exist. That
* is equivalent to having a pagelsn of 0, so we
* would not have to undo anything. In this case,
* don't bother creating a page.
*/
*lsnp = argp->prev_lsn;
ret = 0;
goto out;
} else
if ((ret = memp_fget(mpf,
&argp->pgno, DB_MPOOL_CREATE, &pagep)) != 0)
goto out;
}
/*
* There are two types of log messages here, one for the old page
* and one for the new pages created. The original image in the
* SPLITOLD record is used for undo. The image in the SPLITNEW
* is used for redo. We should never have a case where there is
* a redo operation and the SPLITOLD record is on disk, but not
* the SPLITNEW record. Therefore, we only redo NEW messages
* and only undo OLD messages.
*/
change = 0;
cmp_n = log_compare(lsnp, &LSN(pagep));
cmp_p = log_compare(&LSN(pagep), &argp->pagelsn);
if (cmp_p == 0 && redo) {
if (argp->opcode == DB_SPLITNEW) {
/* Need to redo the split described. */
memcpy(pagep,
argp->pageimage.data, argp->pageimage.size);
}
LSN(pagep) = *lsnp;
change = DB_MPOOL_DIRTY;
} else if (cmp_n == 0 && !redo) {
if (argp->opcode == DB_SPLITOLD) {
/* Put back the old image. */
memcpy(pagep,
argp->pageimage.data, argp->pageimage.size);
}
LSN(pagep) = argp->pagelsn;
change = DB_MPOOL_DIRTY;
}
if ((ret = memp_fput(mpf, pagep, change)) == 0)
*lsnp = argp->prev_lsn;
out: REC_CLOSE;
}
/*
* PUBLIC: int __db_big_recover __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
*/
int
__db_big_recover(logp, dbtp, lsnp, redo, info)
DB_LOG *logp;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__db_big_args *argp;
DB *file_dbp, *mdbp;
DB_MPOOLFILE *mpf;
PAGE *pagep;
int change, cmp_n, cmp_p, ret;
REC_PRINT(__db_big_print);
REC_INTRO(__db_big_read);
if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
if (!redo) {
/*
* We are undoing and the page doesn't exist. That
* is equivalent to having a pagelsn of 0, so we
* would not have to undo anything. In this case,
* don't bother creating a page.
*/
ret = 0;
goto ppage;
} else
if ((ret = memp_fget(mpf,
&argp->pgno, DB_MPOOL_CREATE, &pagep)) != 0)
goto out;
}
/*
* There are three pages we need to check. The one on which we are
* adding data, the previous one whose next_pointer may have
* been updated, and the next one whose prev_pointer may have
* been updated.
*/
cmp_n = log_compare(lsnp, &LSN(pagep));
cmp_p = log_compare(&LSN(pagep), &argp->pagelsn);
change = 0;
if ((cmp_p == 0 && redo && argp->opcode == DB_ADD_BIG) ||
(cmp_n == 0 && !redo && argp->opcode == DB_REM_BIG)) {
/* We are either redo-ing an add, or undoing a delete. */
P_INIT(pagep, file_dbp->pgsize, argp->pgno, argp->prev_pgno,
argp->next_pgno, 0, P_OVERFLOW);
OV_LEN(pagep) = argp->dbt.size;
OV_REF(pagep) = 1;
memcpy((u_int8_t *)pagep + P_OVERHEAD, argp->dbt.data,
argp->dbt.size);
PREV_PGNO(pagep) = argp->prev_pgno;
change = DB_MPOOL_DIRTY;
} else if ((cmp_n == 0 && !redo && argp->opcode == DB_ADD_BIG) ||
(cmp_p == 0 && redo && argp->opcode == DB_REM_BIG)) {
/*
* We are either undo-ing an add or redo-ing a delete.
* The page is about to be reclaimed in either case, so
* there really isn't anything to do here.
*/
change = DB_MPOOL_DIRTY;
}
if (change)
LSN(pagep) = redo ? *lsnp : argp->pagelsn;
if ((ret = memp_fput(mpf, pagep, change)) != 0)
goto out;
/* Now check the previous page. */
ppage: if (argp->prev_pgno != PGNO_INVALID) {
change = 0;
if ((ret = memp_fget(mpf, &argp->prev_pgno, 0, &pagep)) != 0)
if (!redo) {
/*
* We are undoing and the page doesn't exist.
* That is equivalent to having a pagelsn of 0,
* so we would not have to undo anything. In
* this case, don't bother creating a page.
*/
*lsnp = argp->prev_lsn;
ret = 0;
goto npage;
} else
if ((ret = memp_fget(mpf, &argp->prev_pgno,
DB_MPOOL_CREATE, &pagep)) != 0)
goto out;
cmp_n = log_compare(lsnp, &LSN(pagep));
cmp_p = log_compare(&LSN(pagep), &argp->prevlsn);
if ((cmp_p == 0 && redo && argp->opcode == DB_ADD_BIG) ||
(cmp_n == 0 && !redo && argp->opcode == DB_REM_BIG)) {
/* Redo add, undo delete. */
NEXT_PGNO(pagep) = argp->pgno;
change = DB_MPOOL_DIRTY;
} else if ((cmp_n == 0 &&
!redo && argp->opcode == DB_ADD_BIG) ||
(cmp_p == 0 && redo && argp->opcode == DB_REM_BIG)) {
/* Redo delete, undo add. */
NEXT_PGNO(pagep) = argp->next_pgno;
change = DB_MPOOL_DIRTY;
}
if (change)
LSN(pagep) = redo ? *lsnp : argp->prevlsn;
if ((ret = memp_fput(mpf, pagep, change)) != 0)
goto out;
}
/* Now check the next page. Can only be set on a delete. */
npage: if (argp->next_pgno != PGNO_INVALID) {
change = 0;
if ((ret = memp_fget(mpf, &argp->next_pgno, 0, &pagep)) != 0)
if (!redo) {
/*
* We are undoing and the page doesn't exist.
* That is equivalent to having a pagelsn of 0,
* so we would not have to undo anything. In
* this case, don't bother creating a page.
*/
*lsnp = argp->prev_lsn;
ret = 0;
goto out;
} else
if ((ret = memp_fget(mpf, &argp->next_pgno,
DB_MPOOL_CREATE, &pagep)) != 0)
goto out;
cmp_n = log_compare(lsnp, &LSN(pagep));
cmp_p = log_compare(&LSN(pagep), &argp->nextlsn);
if (cmp_p == 0 && redo) {
PREV_PGNO(pagep) = PGNO_INVALID;
change = DB_MPOOL_DIRTY;
} else if (cmp_n == 0 && !redo) {
PREV_PGNO(pagep) = argp->pgno;
change = DB_MPOOL_DIRTY;
}
if (change)
LSN(pagep) = redo ? *lsnp : argp->nextlsn;
if ((ret = memp_fput(mpf, pagep, change)) != 0)
goto out;
}
*lsnp = argp->prev_lsn;
out: REC_CLOSE;
}
/*
* __db_ovref_recover --
* Recovery function for __db_ioff().
*
* PUBLIC: int __db_ovref_recover __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
*/
int
__db_ovref_recover(logp, dbtp, lsnp, redo, info)
DB_LOG *logp;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__db_ovref_args *argp;
DB *file_dbp, *mdbp;
DB_MPOOLFILE *mpf;
PAGE *pagep;
int modified, ret;
REC_PRINT(__db_ovref_print);
REC_INTRO(__db_ovref_read);
if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
(void)__db_pgerr(file_dbp, argp->pgno);
goto out;
}
modified = 0;
if (log_compare(lsnp, &argp->lsn) == 0 && redo) {
/* Need to redo update described. */
++OV_REF(pagep);
pagep->lsn = *lsnp;
modified = 1;
} else if (log_compare(lsnp, &LSN(pagep)) == 0 && !redo) {
/* Need to undo update described. */
--OV_REF(pagep);
pagep->lsn = argp->lsn;
modified = 1;
}
ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0);
*lsnp = argp->prev_lsn;
out: REC_CLOSE;
}
/*
* __db_relink_recover --
* Recovery function for relink.
*
* PUBLIC: int __db_relink_recover
* PUBLIC: __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
*/
int
__db_relink_recover(logp, dbtp, lsnp, redo, info)
DB_LOG *logp;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__db_relink_args *argp;
DB *file_dbp, *mdbp;
DB_MPOOLFILE *mpf;
PAGE *pagep;
int modified, ret;
REC_PRINT(__db_relink_print);
REC_INTRO(__db_relink_read);
/*
* There are three pages we need to check -- the page, and the
* previous and next pages, if they existed.
*/
if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
if (redo) {
(void)__db_pgerr(file_dbp, argp->pgno);
goto out;
}
goto next;
}
modified = 0;
if (log_compare(lsnp, &argp->lsn) == 0 && redo) {
/* Redo the relink. */
pagep->lsn = *lsnp;
modified = 1;
} else if (log_compare(lsnp, &LSN(pagep)) == 0 && !redo) {
/* Undo the relink. */
pagep->next_pgno = argp->next;
pagep->prev_pgno = argp->prev;
pagep->lsn = argp->lsn;
modified = 1;
}
if ((ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0) {
(void)__db_panic(file_dbp);
goto out;
}
next: if ((ret = memp_fget(mpf, &argp->next, 0, &pagep)) != 0) {
if (redo) {
(void)__db_pgerr(file_dbp, argp->next);
goto out;
}
goto prev;
}
modified = 0;
if (log_compare(lsnp, &argp->lsn_next) == 0 && redo) {
/* Redo the relink. */
pagep->prev_pgno = argp->prev;
pagep->lsn = *lsnp;
modified = 1;
} else if (log_compare(lsnp, &LSN(pagep)) == 0 && !redo) {
/* Undo the relink. */
pagep->prev_pgno = argp->pgno;
pagep->lsn = argp->lsn_next;
modified = 1;
}
if ((ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0) {
(void)__db_panic(file_dbp);
goto out;
}
prev: if ((ret = memp_fget(mpf, &argp->prev, 0, &pagep)) != 0) {
if (redo) {
(void)__db_pgerr(file_dbp, argp->prev);
goto out;
}
goto done;
}
modified = 0;
if (log_compare(lsnp, &argp->lsn_prev) == 0 && redo) {
/* Redo the relink. */
pagep->next_pgno = argp->next;
pagep->lsn = *lsnp;
modified = 1;
} else if (log_compare(lsnp, &LSN(pagep)) == 0 && !redo) {
/* Undo the relink. */
pagep->next_pgno = argp->pgno;
pagep->lsn = argp->lsn_prev;
modified = 1;
}
if ((ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0) {
(void) __db_panic(file_dbp);
goto out;
}
done: *lsnp = argp->prev_lsn;
ret = 0;
out: REC_CLOSE;
}
/*
* PUBLIC: int __db_addpage_recover
* PUBLIC: __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
*/
int
__db_addpage_recover(logp, dbtp, lsnp, redo, info)
DB_LOG *logp;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__db_addpage_args *argp;
DB *file_dbp, *mdbp;
DB_MPOOLFILE *mpf;
PAGE *pagep;
int change, cmp_n, cmp_p, ret;
REC_PRINT(__db_addpage_print);
REC_INTRO(__db_addpage_read);
/*
* We need to check two pages: the old one and the new one onto
* which we're going to add duplicates. Do the old one first.
*/
if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0)
goto out;
change = 0;
cmp_n = log_compare(lsnp, &LSN(pagep));
cmp_p = log_compare(&LSN(pagep), &argp->lsn);
if (cmp_p == 0 && redo) {
NEXT_PGNO(pagep) = argp->nextpgno;
LSN(pagep) = *lsnp;
change = DB_MPOOL_DIRTY;
} else if (cmp_n == 0 && !redo) {
NEXT_PGNO(pagep) = PGNO_INVALID;
LSN(pagep) = argp->lsn;
change = DB_MPOOL_DIRTY;
}
if ((ret = memp_fput(mpf, pagep, change)) != 0)
goto out;
if ((ret = memp_fget(mpf, &argp->nextpgno, 0, &pagep)) != 0)
if (!redo) {
/*
* We are undoing and the page doesn't exist. That
* is equivalent to having a pagelsn of 0, so we
* would not have to undo anything. In this case,
* don't bother creating a page.
*/
ret = 0;
goto out;
} else
if ((ret = memp_fget(mpf,
&argp->nextpgno, DB_MPOOL_CREATE, &pagep)) != 0)
goto out;
change = 0;
cmp_n = log_compare(lsnp, &LSN(pagep));
cmp_p = log_compare(&LSN(pagep), &argp->nextlsn);
if (cmp_p == 0 && redo) {
PREV_PGNO(pagep) = argp->pgno;
LSN(pagep) = *lsnp;
change = DB_MPOOL_DIRTY;
} else if (cmp_n == 0 && !redo) {
PREV_PGNO(pagep) = PGNO_INVALID;
LSN(pagep) = argp->nextlsn;
change = DB_MPOOL_DIRTY;
}
ret = memp_fput(mpf, pagep, change);
out: if (ret == 0)
*lsnp = argp->prev_lsn;
REC_CLOSE;
}
/*
* __db_debug_recover --
* Recovery function for debug.
*
* PUBLIC: int __db_debug_recover __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
*/
int
__db_debug_recover(logp, dbtp, lsnp, redo, info)
DB_LOG *logp;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__db_debug_args *argp;
int ret;
REC_PRINT(__db_debug_print);
REC_NOOP_INTRO(__db_debug_read);
*lsnp = argp->prev_lsn;
ret = 0;
REC_NOOP_CLOSE;
}
/*
* __db_noop_recover --
* Recovery function for noop.
*
* PUBLIC: int __db_noop_recover
* PUBLIC: __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
*/
int
__db_noop_recover(logp, dbtp, lsnp, redo, info)
DB_LOG *logp;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__db_noop_args *argp;
int ret;
REC_PRINT(__db_noop_print);
REC_NOOP_INTRO(__db_noop_read);
*lsnp = argp->prev_lsn;
ret = 0;
REC_NOOP_CLOSE;
}