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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.
This commit is contained in:
Ulrich Drepper
818
db2/db/db.c
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818
db2/db/db.c
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@ -0,0 +1,818 @@
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/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996, 1997
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* Sleepycat Software. All rights reserved.
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*/
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/*
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* Copyright (c) 1990, 1993, 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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*/
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/*
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* Copyright (c) 1990, 1993, 1994, 1995
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "@(#)db.c 10.37 (Sleepycat) 8/23/97";
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#endif /* not lint */
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#endif
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#include "db_int.h"
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#include "shqueue.h"
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#include "db_page.h"
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#include "db_shash.h"
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#include "db_swap.h"
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#include "btree.h"
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#include "hash.h"
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#include "mp.h"
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#include "db_am.h"
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#include "common_ext.h"
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static int db_close __P((DB *, int));
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static int db_fd __P((DB *, int *));
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/*
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* If the metadata page has the flag set, set the local flag. If the page
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* does NOT have the flag set, return EINVAL if the user's dbinfo argument
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* caused us to already set the local flag.
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*/
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#define DBINFO_FCHK(dbp, fn, meta_flags, m_name, dbp_name) { \
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if ((meta_flags) & (m_name)) \
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F_SET(dbp, dbp_name); \
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else \
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if (F_ISSET(dbp, dbp_name)) { \
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__db_err(dbenv, \
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"%s: %s specified in dbinfo argument but not set in file", \
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fname, fn); \
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goto einval; \
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} \
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}
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/*
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* db_open --
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* Main library interface to the DB access methods.
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*/
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int
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db_open(fname, type, flags, mode, dbenv, dbinfo, dbpp)
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const char *fname;
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DBTYPE type;
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int flags, mode;
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DB_ENV *dbenv;
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DB_INFO *dbinfo;
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DB **dbpp;
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{
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BTMETA *btm;
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DB *dbp;
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DBT pgcookie;
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DB_ENV *envp, t_dbenv;
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DB_PGINFO pginfo;
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HASHHDR *hashm;
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off_t io;
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size_t cachesize;
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ssize_t nr;
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int fd, ftype, need_fileid, restore, ret, retry_cnt, swapped;
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char *real_name, mbuf[512];
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/* Validate arguments. */
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#ifdef HAVE_SPINLOCKS
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#define OKFLAGS (DB_CREATE | DB_NOMMAP | DB_RDONLY | DB_THREAD | DB_TRUNCATE)
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#else
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#define OKFLAGS (DB_CREATE | DB_NOMMAP | DB_RDONLY | DB_TRUNCATE)
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#endif
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if ((ret = __db_fchk(dbenv, "db_open", flags, OKFLAGS)) != 0)
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return (ret);
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/* Initialize for error return. */
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fd = -1;
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need_fileid = 1;
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real_name = NULL;
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/* Allocate the DB structure, reference the DB_ENV structure. */
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if ((dbp = (DB *)calloc(1, sizeof(DB))) == NULL) {
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__db_err(dbenv, "%s", strerror(ENOMEM));
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return (ENOMEM);
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}
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dbp->dbenv = dbenv;
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/* Convert the dbinfo flags. */
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if (dbinfo != NULL) {
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/*
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* !!!
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* We can't check for illegal flags until we know what type
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* of open we're doing.
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*/
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if (F_ISSET(dbinfo, DB_DELIMITER))
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F_SET(dbp, DB_RE_DELIMITER);
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if (F_ISSET(dbinfo, DB_DUP))
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F_SET(dbp, DB_AM_DUP);
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if (F_ISSET(dbinfo, DB_FIXEDLEN))
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F_SET(dbp, DB_RE_FIXEDLEN);
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if (F_ISSET(dbinfo, DB_PAD))
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F_SET(dbp, DB_RE_PAD);
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if (F_ISSET(dbinfo, DB_RECNUM))
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F_SET(dbp, DB_BT_RECNUM);
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if (F_ISSET(dbinfo, DB_RENUMBER))
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F_SET(dbp, DB_RE_RENUMBER);
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if (F_ISSET(dbinfo, DB_SNAPSHOT))
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F_SET(dbp, DB_RE_SNAPSHOT);
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}
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/* Set based on the open(2) flags. */
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if (LF_ISSET(DB_RDONLY))
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F_SET(dbp, DB_AM_RDONLY);
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/* Check threading fields. */
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if (LF_ISSET(DB_THREAD)) {
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if ((dbp->mutex =
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(db_mutex_t *)malloc(sizeof(db_mutex_t))) == NULL) {
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__db_err(dbenv, "%s", strerror(ENOMEM));
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ret = ENOMEM;
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goto err;
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}
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__db_mutex_init(dbp->mutex, 0);
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F_SET(dbp, DB_AM_THREAD);
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}
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/*
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* Always set the master and initialize the queues, so we can
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* use these fields without checking the thread bit.
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*/
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dbp->master = dbp;
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LIST_INIT(&dbp->handleq);
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LIST_INSERT_HEAD(&dbp->handleq, dbp, links);
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TAILQ_INIT(&dbp->curs_queue);
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/*
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* Set based on the dbenv fields, although no logging or transactions
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* are possible for temporary files.
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*/
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if (dbp->dbenv != NULL) {
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if (dbenv->lk_info != NULL)
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F_SET(dbp, DB_AM_LOCKING);
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if (fname != NULL && dbenv->lg_info != NULL)
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F_SET(dbp, DB_AM_LOGGING);
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}
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/* Set the common fields. */
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if (dbinfo == NULL) {
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dbp->pgsize = 0;
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dbp->db_malloc = NULL;
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} else {
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dbp->pgsize = dbinfo->db_pagesize;
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dbp->db_malloc = dbinfo->db_malloc;
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}
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/* Fill in the default file mode. */
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if (mode == 0)
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mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
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/* Check if the user wants us to swap byte order. */
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if (dbinfo != NULL)
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switch (ret = __db_byteorder(dbenv, dbinfo->db_lorder)) {
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case 0:
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break;
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case DB_SWAPBYTES:
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F_SET(dbp, DB_AM_SWAP);
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break;
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default:
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goto err;
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}
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/*
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* If we have a file name, try and read the first page, figure out
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* what type of file it is, and initialize everything we can based
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* on that file's meta-data page.
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*
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* XXX
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* We don't actually expect zero-length strings as arguments. We
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* do the check, permitting them, because scripting languages, e.g.,
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* the Tcl test suite, doesn't know anything about passing NULL's.
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*/
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if (fname != NULL && fname[0] != '\0') {
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/* Get the real file name. */
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if ((ret = __db_appname(dbenv,
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DB_APP_DATA, NULL, fname, NULL, &real_name)) != 0)
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goto err;
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/*
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* Open the backing file. We need to make sure that multiple
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* processes attempting to create the file at the same time
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* are properly ordered so that only one of them creates the
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* "unique" file id, so we open it O_EXCL and O_CREAT so two
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* simultaneous attempts to create the region will return
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* failure in one of the attempts. If we're one of the ones
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* that fail, we simply retry without the O_CREAT flag, which
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* will require that the meta-data page exist.
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*/
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#undef OKFLAGS
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#define OKFLAGS \
|
||||
DB_CREATE | DB_NOMMAP | DB_RDONLY | DB_THREAD | DB_TRUNCATE
|
||||
retry_cnt = 0;
|
||||
open_retry: if (LF_ISSET(DB_CREATE)) {
|
||||
if ((ret = __db_fdopen(real_name, flags | DB_EXCL,
|
||||
OKFLAGS | DB_EXCL, mode, &fd)) != 0)
|
||||
if (ret == EEXIST) {
|
||||
LF_CLR(DB_CREATE);
|
||||
goto open_retry;
|
||||
} else {
|
||||
__db_err(dbenv,
|
||||
"%s: %s", fname, strerror(ret));
|
||||
goto err;
|
||||
}
|
||||
} else
|
||||
if ((ret = __db_fdopen(real_name,
|
||||
flags, OKFLAGS, mode, &fd)) != 0) {
|
||||
__db_err(dbenv, "%s: %s", fname, strerror(ret));
|
||||
goto err;
|
||||
}
|
||||
|
||||
/*
|
||||
* Use the optimum I/O size as the pagesize if a pagesize not
|
||||
* specified. Some filesystems have 64K as their optimum I/O
|
||||
* size, but as that results in impossibly large default cache
|
||||
* sizes, we limit the default pagesize to 16K.
|
||||
*/
|
||||
if (dbp->pgsize == 0) {
|
||||
if ((ret = __db_stat(dbp->dbenv,
|
||||
real_name, fd, NULL, &io)) != 0)
|
||||
goto err;
|
||||
if (io < 512)
|
||||
io = 512;
|
||||
if (io > 16 * 1024)
|
||||
io = 16 * 1024;
|
||||
dbp->pgsize = io;
|
||||
F_SET(dbp, DB_AM_PGDEF);
|
||||
}
|
||||
|
||||
/*
|
||||
* Try and read the first disk sector -- this code assumes
|
||||
* that the meta-data for all access methods fits in 512
|
||||
* bytes, and that no database will be smaller than that.
|
||||
*/
|
||||
if ((ret = __db_read(fd, mbuf, sizeof(mbuf), &nr)) != 0)
|
||||
goto err;
|
||||
|
||||
/* The fd is no longer needed. */
|
||||
(void)__db_close(fd);
|
||||
fd = -1;
|
||||
|
||||
if (nr != sizeof(mbuf)) {
|
||||
if (nr != 0) {
|
||||
__db_err(dbenv,
|
||||
"%s: unexpected file format", fname);
|
||||
goto einval;
|
||||
}
|
||||
/*
|
||||
* The only way we can reach here with the DB_CREATE
|
||||
* flag set is if we created the file. If we didn't
|
||||
* create the file, there's a chance that someone else
|
||||
* is busily doing so. Sleep and give them a chance,
|
||||
* because we need the metadata page their going to
|
||||
* write.
|
||||
*/
|
||||
if (!LF_ISSET(DB_CREATE) && retry_cnt++ < 3) {
|
||||
__db_sleep(1, 0);
|
||||
goto open_retry;
|
||||
}
|
||||
if (type == DB_UNKNOWN) {
|
||||
__db_err(dbenv,
|
||||
"%s: DBTYPE of unknown with empty file",
|
||||
fname);
|
||||
goto einval;
|
||||
}
|
||||
goto empty;
|
||||
}
|
||||
|
||||
/*
|
||||
* A found file overrides some user information. We'll check
|
||||
* for possible error conditions based on conflicts between
|
||||
* the file and the user's arguments below.
|
||||
*/
|
||||
swapped = 0;
|
||||
F_CLR(dbp, DB_AM_SWAP);
|
||||
|
||||
retry: switch (((BTMETA *)mbuf)->magic) {
|
||||
case DB_BTREEMAGIC:
|
||||
if (type != DB_BTREE &&
|
||||
type != DB_RECNO && type != DB_UNKNOWN)
|
||||
goto einval;
|
||||
|
||||
btm = (BTMETA *)mbuf;
|
||||
if (swapped && (ret = __bam_mswap((PAGE *)btm)) != 0)
|
||||
goto err;
|
||||
|
||||
if (btm->version < DB_BTREEOLDVER ||
|
||||
btm->version > DB_BTREEVERSION) {
|
||||
__db_err(dbenv,
|
||||
"%s: unsupported btree version number %lu",
|
||||
fname, (u_long)btm->version);
|
||||
goto einval;
|
||||
}
|
||||
dbp->pgsize = btm->pagesize;
|
||||
F_CLR(dbp, DB_AM_PGDEF);
|
||||
|
||||
if ((ret = __db_fchk(dbenv,
|
||||
"db_open", btm->flags, BTM_MASK)) != 0)
|
||||
goto err;
|
||||
DBINFO_FCHK(dbp, "DB_DUP",
|
||||
btm->flags, BTM_DUP, DB_AM_DUP);
|
||||
if (F_ISSET(btm, BTM_RECNO)) {
|
||||
DBINFO_FCHK(dbp, "DB_FIXEDLEN",
|
||||
btm->flags, BTM_FIXEDLEN, DB_RE_FIXEDLEN);
|
||||
DBINFO_FCHK(dbp, "DB_RENUMBER",
|
||||
btm->flags, BTM_RENUMBER, DB_RE_RENUMBER);
|
||||
type = DB_RECNO;
|
||||
} else {
|
||||
DBINFO_FCHK(dbp, "DB_RECNUM",
|
||||
btm->flags, BTM_RECNUM, DB_BT_RECNUM);
|
||||
type = DB_BTREE;
|
||||
}
|
||||
|
||||
/* Copy the file's unique id. */
|
||||
need_fileid = 0;
|
||||
memcpy(dbp->lock.fileid, btm->uid, DB_FILE_ID_LEN);
|
||||
break;
|
||||
case DB_HASHMAGIC:
|
||||
if (type != DB_HASH && type != DB_UNKNOWN)
|
||||
goto einval;
|
||||
|
||||
hashm = (HASHHDR *)mbuf;
|
||||
if (swapped && (ret = __ham_mswap((PAGE *)hashm)) != 0)
|
||||
goto err;
|
||||
|
||||
if (hashm->version < DB_HASHOLDVER ||
|
||||
hashm->version > DB_HASHVERSION) {
|
||||
__db_err(dbenv,
|
||||
"%s: unsupported hash version number %lu",
|
||||
fname, hashm->version);
|
||||
goto einval;
|
||||
}
|
||||
dbp->pgsize = hashm->pagesize;
|
||||
F_CLR(dbp, DB_AM_PGDEF);
|
||||
|
||||
if ((ret = __db_fchk(dbenv,
|
||||
"db_open", hashm->flags, DB_HASH_DUP)) != 0)
|
||||
goto err;
|
||||
DBINFO_FCHK(dbp, "DB_DUP",
|
||||
hashm->flags, DB_HASH_DUP, DB_AM_DUP);
|
||||
type = DB_HASH;
|
||||
|
||||
/* Copy the file's unique id. */
|
||||
need_fileid = 0;
|
||||
memcpy(dbp->lock.fileid, hashm->uid, DB_FILE_ID_LEN);
|
||||
break;
|
||||
default:
|
||||
if (swapped) {
|
||||
__db_err(dbenv, "unrecognized file type");
|
||||
goto einval;
|
||||
}
|
||||
M_32_SWAP(((BTMETA *)mbuf)->magic);
|
||||
F_SET(dbp, DB_AM_SWAP);
|
||||
|
||||
swapped = 1;
|
||||
goto retry;
|
||||
}
|
||||
} else {
|
||||
fname = real_name = NULL;
|
||||
|
||||
if (type == DB_UNKNOWN) {
|
||||
__db_err(dbenv,
|
||||
"DBTYPE of unknown without existing file");
|
||||
goto einval;
|
||||
}
|
||||
F_SET(dbp, DB_AM_INMEM);
|
||||
}
|
||||
|
||||
empty: /*
|
||||
* By the time we get here we've either set the type or we're taking
|
||||
* it from the user.
|
||||
*/
|
||||
dbp->type = type;
|
||||
|
||||
/*
|
||||
* Set the page size to the best value for I/O to this file. Don't
|
||||
* overflow the page offset type. The page size must be db_indx_t
|
||||
* aligned and >= MIN_PAGE_SIZE.
|
||||
*
|
||||
* XXX
|
||||
* Should we be checking for a page size that's not a multiple of 512?
|
||||
*/
|
||||
if (dbp->pgsize == 0) {
|
||||
F_SET(dbp, DB_AM_PGDEF);
|
||||
dbp->pgsize = 8 * 1024;
|
||||
}
|
||||
if (dbp->pgsize < DB_MIN_PGSIZE ||
|
||||
dbp->pgsize > DB_MAX_PGSIZE ||
|
||||
dbp->pgsize & (sizeof(db_indx_t) - 1)) {
|
||||
__db_err(dbenv, "illegal page size");
|
||||
goto einval;
|
||||
}
|
||||
|
||||
/*
|
||||
* Set and/or correct the cache size; must be a multiple of the
|
||||
* page size.
|
||||
*/
|
||||
if (dbinfo == NULL || dbinfo->db_cachesize == 0)
|
||||
cachesize = dbp->pgsize * DB_MINCACHE;
|
||||
else {
|
||||
cachesize = dbinfo->db_cachesize;
|
||||
if (cachesize & (dbp->pgsize - 1))
|
||||
cachesize += (~cachesize & (dbp->pgsize - 1)) + 1;
|
||||
if (cachesize < dbp->pgsize * DB_MINCACHE)
|
||||
cachesize = dbp->pgsize * DB_MINCACHE;
|
||||
if (cachesize < 20 * 1024)
|
||||
cachesize = 20 * 1024;
|
||||
}
|
||||
|
||||
/*
|
||||
* If no mpool supplied by the application, attach to a local,
|
||||
* created buffer pool.
|
||||
*
|
||||
* XXX
|
||||
* If the user has a DB_ENV structure, we have to use a temporary
|
||||
* one so that we don't step on their values. If the user doesn't,
|
||||
* we have to create one, and keep it around until the call to the
|
||||
* memp_close() function. This is all so the mpool functions get
|
||||
* the error stuff right.
|
||||
*/
|
||||
if (dbenv == NULL || dbenv->mp_info == NULL) {
|
||||
F_SET(dbp, DB_AM_MLOCAL);
|
||||
|
||||
if (dbenv == NULL) {
|
||||
if ((dbp->mp_dbenv =
|
||||
(DB_ENV *)calloc(sizeof(DB_ENV), 1)) == NULL) {
|
||||
ret = ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
envp = dbp->mp_dbenv;
|
||||
restore = 0;
|
||||
} else {
|
||||
t_dbenv = *dbenv;
|
||||
|
||||
envp = dbenv;
|
||||
restore = 1;
|
||||
}
|
||||
envp->mp_size = cachesize;
|
||||
F_SET(envp, DB_MPOOL_PRIVATE);
|
||||
if ((ret = memp_open(NULL,
|
||||
DB_CREATE, S_IRUSR | S_IWUSR, envp, &dbp->mp)) != 0)
|
||||
goto err;
|
||||
if (restore)
|
||||
*dbenv = t_dbenv;
|
||||
} else
|
||||
dbp->mp = dbenv->mp_info;
|
||||
|
||||
/* Register DB's pgin/pgout functions. */
|
||||
if ((ret = memp_register(dbp->mp,
|
||||
DB_FTYPE_BTREE, __bam_pgin, __bam_pgout)) != 0)
|
||||
goto err;
|
||||
if ((ret = memp_register(dbp->mp,
|
||||
DB_FTYPE_HASH, __ham_pgin, __ham_pgout)) != 0)
|
||||
goto err;
|
||||
|
||||
/*
|
||||
* If we don't already have one, get a unique file ID. If the file
|
||||
* is a temporary file, then we have to create a unique file ID --
|
||||
* no backing file will be created until the mpool cache is filled
|
||||
* forcing it to go to disk. The created ID must never match any
|
||||
* potential real file ID -- we know it won't because real file IDs
|
||||
* contain a time stamp after the dev/ino pair, and we're simply
|
||||
* storing a 4-byte locker ID.
|
||||
*
|
||||
* XXX
|
||||
* Store the file id in the locker structure -- we can get it from
|
||||
* there as necessary, and it saves having two copies.
|
||||
*/
|
||||
if (need_fileid)
|
||||
if (fname == NULL) {
|
||||
memset(dbp->lock.fileid, 0, DB_FILE_ID_LEN);
|
||||
if (F_ISSET(dbp, DB_AM_LOCKING) &&
|
||||
(ret = lock_id(dbenv->lk_info,
|
||||
(u_int32_t *)dbp->lock.fileid)) != 0)
|
||||
goto err;
|
||||
} else
|
||||
if ((ret = __db_fileid(dbenv,
|
||||
real_name, 1, dbp->lock.fileid)) != 0)
|
||||
goto err;
|
||||
|
||||
/* No further use for the real name. */
|
||||
if (real_name != NULL)
|
||||
FREES(real_name);
|
||||
real_name = NULL;
|
||||
|
||||
/*
|
||||
* Open a backing file in the memory pool.
|
||||
*
|
||||
* If we need to process the file's pages on I/O, set the file type.
|
||||
* If it's a hash file, always call pgin and pgout routines. This
|
||||
* means that hash files can never be mapped into process memory. If
|
||||
* it's a btree file and requires swapping, we need to page the file
|
||||
* in and out. This has to be right -- we can't mmap files that are
|
||||
* being paged in and out.
|
||||
*/
|
||||
if (type == DB_HASH)
|
||||
ftype = DB_FTYPE_HASH;
|
||||
else
|
||||
ftype = F_ISSET(dbp, DB_AM_SWAP) ? DB_FTYPE_BTREE : 0;
|
||||
pginfo.db_pagesize = dbp->pgsize;
|
||||
pginfo.needswap = F_ISSET(dbp, DB_AM_SWAP);
|
||||
pgcookie.data = &pginfo;
|
||||
pgcookie.size = sizeof(DB_PGINFO);
|
||||
|
||||
if ((ret = memp_fopen(dbp->mp, fname, ftype,
|
||||
F_ISSET(dbp, DB_AM_RDONLY) ? DB_RDONLY : 0, 0, dbp->pgsize,
|
||||
0, &pgcookie, dbp->lock.fileid, &dbp->mpf)) != 0)
|
||||
goto err;
|
||||
|
||||
/* Get a log file id. */
|
||||
if (F_ISSET(dbp, DB_AM_LOGGING) &&
|
||||
(ret = log_register(dbenv->lg_info,
|
||||
dbp, fname, type, &dbp->log_fileid)) != 0)
|
||||
goto err;
|
||||
|
||||
/*
|
||||
* Get a locker id for this DB, and build the lock cookie: the first
|
||||
* db_pgno_t bytes are the page number, the next N bytes are the file
|
||||
* id.
|
||||
*/
|
||||
if (F_ISSET(dbp, DB_AM_LOCKING)) {
|
||||
if ((ret = lock_id(dbenv->lk_info, &dbp->locker)) != 0)
|
||||
goto err;
|
||||
dbp->lock_dbt.size = sizeof(dbp->lock);
|
||||
dbp->lock_dbt.data = &dbp->lock;
|
||||
}
|
||||
|
||||
/* Call the real open function. */
|
||||
switch (type) {
|
||||
case DB_BTREE:
|
||||
if (dbinfo != NULL && (ret = __db_fchk(dbenv,
|
||||
"db_open", dbinfo->flags, DB_RECNUM | DB_DUP)) != 0)
|
||||
goto err;
|
||||
if (dbinfo != NULL && (ret = __db_fcchk(dbenv,
|
||||
"db_open", dbinfo->flags, DB_DUP, DB_RECNUM)) != 0)
|
||||
goto err;
|
||||
if ((ret = __bam_open(dbp, type, dbinfo)) != 0)
|
||||
goto err;
|
||||
break;
|
||||
case DB_HASH:
|
||||
if (dbinfo != NULL && (ret = __db_fchk(dbenv,
|
||||
"db_open", dbinfo->flags, DB_DUP)) != 0)
|
||||
goto err;
|
||||
if ((ret = __ham_open(dbp, dbinfo)) != 0)
|
||||
goto err;
|
||||
break;
|
||||
case DB_RECNO:
|
||||
#define DB_INFO_FLAGS \
|
||||
(DB_DELIMITER | DB_FIXEDLEN | DB_PAD | DB_RENUMBER | DB_SNAPSHOT)
|
||||
if (dbinfo != NULL && (ret = __db_fchk(dbenv,
|
||||
"db_open", dbinfo->flags, DB_INFO_FLAGS)) != 0)
|
||||
goto err;
|
||||
if ((ret = __ram_open(dbp, type, dbinfo)) != 0)
|
||||
goto err;
|
||||
break;
|
||||
default:
|
||||
abort();
|
||||
}
|
||||
|
||||
/* Call a local close routine. */
|
||||
dbp->close = db_close;
|
||||
dbp->fd = db_fd;
|
||||
|
||||
*dbpp = dbp;
|
||||
return (0);
|
||||
|
||||
einval: ret = EINVAL;
|
||||
err: /* Close the file descriptor. */
|
||||
if (fd != -1)
|
||||
(void)__db_close(fd);
|
||||
|
||||
/* Discard the log file id. */
|
||||
if (dbp->log_fileid != 0)
|
||||
(void)log_unregister(dbenv->lg_info, dbp->log_fileid);
|
||||
|
||||
/* Close the memory pool file. */
|
||||
if (dbp->mpf != NULL)
|
||||
(void)memp_fclose(dbp->mpf);
|
||||
|
||||
/* If the memory pool was local, close it. */
|
||||
if (F_ISSET(dbp, DB_AM_MLOCAL) && dbp->mp != NULL)
|
||||
(void)memp_close(dbp->mp);
|
||||
|
||||
/* If we allocated a DB_ENV, discard it. */
|
||||
if (dbp->mp_dbenv != NULL)
|
||||
FREE(dbp->mp_dbenv, sizeof(DB_ENV));
|
||||
|
||||
if (real_name != NULL)
|
||||
FREES(real_name);
|
||||
if (dbp != NULL)
|
||||
FREE(dbp, sizeof(DB));
|
||||
|
||||
return (ret);
|
||||
}
|
||||
|
||||
/*
|
||||
* db_close --
|
||||
* Close a DB tree.
|
||||
*/
|
||||
static int
|
||||
db_close(dbp, flags)
|
||||
DB *dbp;
|
||||
int flags;
|
||||
{
|
||||
DBC *dbc;
|
||||
DB *tdbp;
|
||||
int ret, t_ret;
|
||||
|
||||
ret = 0;
|
||||
|
||||
/* Sync the underlying file. */
|
||||
if (!LF_ISSET(DB_NOSYNC) &&
|
||||
(t_ret = dbp->sync(dbp, 0)) != 0 && ret == 0)
|
||||
ret = t_ret;
|
||||
|
||||
/*
|
||||
* Call the underlying access method close routine for all the
|
||||
* cursors and handles.
|
||||
*/
|
||||
for (tdbp = LIST_FIRST(&dbp->handleq);
|
||||
tdbp != NULL; tdbp = LIST_NEXT(tdbp, links)) {
|
||||
|
||||
while ((dbc = TAILQ_FIRST(&tdbp->curs_queue)) != NULL)
|
||||
if ((t_ret = dbc->c_close(dbc)) != 0 && ret == 0)
|
||||
ret = t_ret;
|
||||
|
||||
switch (tdbp->type) {
|
||||
case DB_BTREE:
|
||||
if ((t_ret = __bam_close(tdbp)) != 0 && ret == 0)
|
||||
ret = t_ret;
|
||||
break;
|
||||
case DB_HASH:
|
||||
if ((t_ret = __ham_close(tdbp)) != 0 && ret == 0)
|
||||
ret = t_ret;
|
||||
break;
|
||||
case DB_RECNO:
|
||||
if ((t_ret = __ram_close(tdbp)) != 0 && ret == 0)
|
||||
ret = t_ret;
|
||||
break;
|
||||
default:
|
||||
abort();
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/* Sync the memory pool. */
|
||||
if ((t_ret = memp_fsync(dbp->mpf)) != 0 && ret == 0)
|
||||
ret = t_ret;
|
||||
|
||||
/* Close the memory pool file. */
|
||||
if ((t_ret = memp_fclose(dbp->mpf)) != 0 && ret == 0)
|
||||
ret = t_ret;
|
||||
|
||||
/* If the memory pool was local, close it. */
|
||||
if (F_ISSET(dbp, DB_AM_MLOCAL) &&
|
||||
(t_ret = memp_close(dbp->mp)) != 0 && ret == 0)
|
||||
ret = t_ret;
|
||||
|
||||
/* Discard the mutex. */
|
||||
if (dbp->mutex != NULL)
|
||||
FREE(dbp->mutex, sizeof(db_mutex_t));
|
||||
|
||||
/* Discard the log file id. */
|
||||
if (F_ISSET(dbp, DB_AM_LOGGING))
|
||||
(void)log_unregister(dbp->dbenv->lg_info, dbp->log_fileid);
|
||||
|
||||
/* Discard the lock cookie for all handles. */
|
||||
for (tdbp = LIST_FIRST(&dbp->handleq);
|
||||
tdbp != NULL; tdbp = LIST_NEXT(tdbp, links))
|
||||
if (F_ISSET(tdbp, DB_AM_LOCKING)) {
|
||||
#ifdef DEBUG
|
||||
DB_LOCKREQ request;
|
||||
|
||||
/*
|
||||
* If we're running tests, display any locks currently
|
||||
* held. It's possible that some applications may hold
|
||||
* locks for long periods, e.g., conference room locks,
|
||||
* but the DB tests should never close holding locks.
|
||||
*/
|
||||
request.op = DB_LOCK_DUMP;
|
||||
if ((t_ret = lock_vec(tdbp->dbenv->lk_info,
|
||||
tdbp->locker, 0, &request, 1, NULL)) != 0 &&
|
||||
ret == 0)
|
||||
ret = EAGAIN;
|
||||
#endif
|
||||
}
|
||||
|
||||
/* If we allocated a DB_ENV, discard it. */
|
||||
if (dbp->mp_dbenv != NULL)
|
||||
FREE(dbp->mp_dbenv, sizeof(DB_ENV));
|
||||
|
||||
/* Free all of the DB's. */
|
||||
LIST_REMOVE(dbp, links);
|
||||
while ((tdbp = LIST_FIRST(&dbp->handleq)) != NULL) {
|
||||
LIST_REMOVE(tdbp, links);
|
||||
FREE(tdbp, sizeof(*tdbp));
|
||||
}
|
||||
FREE(dbp, sizeof(*dbp));
|
||||
|
||||
return (ret);
|
||||
}
|
||||
|
||||
/*
|
||||
* db_fd --
|
||||
* Return a file descriptor for flock'ing.
|
||||
*/
|
||||
static int
|
||||
db_fd(dbp, fdp)
|
||||
DB *dbp;
|
||||
int *fdp;
|
||||
{
|
||||
/* In-memory database can't have a file descriptor. */
|
||||
if (F_ISSET(dbp, DB_AM_INMEM))
|
||||
return (ENOENT);
|
||||
|
||||
/*
|
||||
* XXX
|
||||
* Truly spectacular layering violation. As we don't open the
|
||||
* underlying file until we need it, it may not be initialized.
|
||||
*/
|
||||
if ((*fdp = dbp->mpf->fd) == -1)
|
||||
return (ENOENT);
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*
|
||||
* __db_pgerr --
|
||||
* Error when unable to retrieve a specified page.
|
||||
*
|
||||
* PUBLIC: int __db_pgerr __P((DB *, db_pgno_t));
|
||||
*/
|
||||
int
|
||||
__db_pgerr(dbp, pgno)
|
||||
DB *dbp;
|
||||
db_pgno_t pgno;
|
||||
{
|
||||
__db_err(dbp->dbenv,
|
||||
"unable to create/retrieve page %lu", (u_long)pgno);
|
||||
return (__db_panic(dbp));
|
||||
}
|
||||
|
||||
/*
|
||||
* __db_pgfmt --
|
||||
* Error when a page has the wrong format.
|
||||
*
|
||||
* PUBLIC: int __db_pgfmt __P((DB *, db_pgno_t));
|
||||
*/
|
||||
int
|
||||
__db_pgfmt(dbp, pgno)
|
||||
DB *dbp;
|
||||
db_pgno_t pgno;
|
||||
{
|
||||
__db_err(dbp->dbenv,
|
||||
"page %lu: illegal page type or format", (u_long)pgno);
|
||||
return (__db_panic(dbp));
|
||||
}
|
||||
Reference in New Issue
Block a user