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/*
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* PROGRAM: JRD Access Method
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* MODULE: pag.cpp
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* DESCRIPTION: Page level ods manager
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*
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* The contents of this file are subject to the Interbase Public
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* License Version 1.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy
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* of the License at http://www.Inprise.com/IPL.html
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*
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* Software distributed under the License is distributed on an
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* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
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* or implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code was created by Inprise Corporation
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* and its predecessors. Portions created by Inprise Corporation are
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* Copyright (C) Inprise Corporation.
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*
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* All Rights Reserved.
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* Contributor(s): ______________________________________.
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*
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* 2002.02.15 Sean Leyne - Code Cleanup, removed obsolete ports:
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* - EPSON, DELTA, IMP, NCR3000, M88K
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* - HP9000 s300 and Apollo
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*
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* 2002.10.27 Sean Leyne - Completed removal of obsolete "DG_X86" port
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* 2002.10.27 Sean Leyne - Code Cleanup, removed obsolete "UNIXWARE" port
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* 2002.10.27 Sean Leyne - Code Cleanup, removed obsolete "Ultrix" port
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* 2002.10.27 Sean Leyne - Code Cleanup, removed obsolete "Ultrix/MIPS" port
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*
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* 2002.10.28 Sean Leyne - Completed removal of obsolete "DGUX" port
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* 2002.10.28 Sean Leyne - Code cleanup, removed obsolete "MPEXL" port
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* 2002.10.28 Sean Leyne - Code cleanup, removed obsolete "DecOSF" port
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* 2002.10.28 Sean Leyne - Code cleanup, removed obsolete "SGI" port
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*
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* 2002.10.29 Sean Leyne - Removed obsolete "Netware" port
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*
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*/
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/*
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* Modified by: Patrick J. P. Griffin
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* Date: 11/29/2000
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* Problem: Bug 116733 Too many generators corrupt database.
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* DPM_gen_id was not calculating page and offset correctly.
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* Change: Caculate pgc_gpg, number of generators per page,
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* for use in DPM_gen_id.
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*/
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/* 2001.07.06 Sean Leyne - Code Cleanup, removed "#ifdef READONLY_DATABASE"
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* conditionals, as the engine now fully supports
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* readonly databases.
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*
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* 2001.08.07 Sean Leyne - Code Cleanup, removed "#ifdef READONLY_DATABASE"
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* conditionals, second attempt
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*
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* 2002.02.15 Sean Leyne - Code Cleanup, removed obsolete "MAC" and "MAC_CP" defines
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* 2002.02.15 Sean Leyne - Code Cleanup, removed obsolete "Apollo" port
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*
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*/
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#include "firebird.h"
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#include "../jrd/common.h"
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#include <stdio.h>
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#include <string.h>
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#ifdef WIN_NT
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#include <process.h>
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#endif
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#include "../jrd/fil.h"
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#include "../jrd/jrd.h"
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#include "../jrd/pag.h"
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#include "../jrd/ods.h"
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#include "../jrd/os/pio.h"
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#include "../jrd/os/path_utils.h"
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#include "../jrd/ibase.h"
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#include "../jrd/gdsassert.h"
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#include "../jrd/lck.h"
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#include "../jrd/sdw.h"
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#include "../jrd/cch.h"
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#include "../jrd/tra.h"
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#ifdef VIO_DEBUG
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#include "../jrd/vio_debug.h"
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#include "../jrd/all.h"
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#endif
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#include "../jrd/cch_proto.h"
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#include "../jrd/dpm_proto.h"
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#include "../jrd/err_proto.h"
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#include "../jrd/gds_proto.h"
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#include "../jrd/lck_proto.h"
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#include "../jrd/met_proto.h"
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#include "../jrd/mov_proto.h"
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#include "../jrd/ods_proto.h"
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#include "../jrd/pag_proto.h"
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#include "../jrd/os/pio_proto.h"
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#include "../jrd/thd.h"
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#include "../jrd/isc_f_proto.h"
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#include "../jrd/TempSpace.h"
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using namespace Jrd;
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using namespace Ods;
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static void find_clump_space(SLONG, WIN*, pag**, USHORT, SSHORT, const UCHAR*,
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USHORT);
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static bool find_type(SLONG, WIN*, pag**, USHORT, USHORT, UCHAR**,
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const UCHAR**);
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inline void err_post_if_database_is_readonly(const Database* dbb)
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{
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if (dbb->dbb_flags & DBB_read_only)
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ERR_post(isc_read_only_database, 0);
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}
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// Class definitions (obsolete platforms are commented out)
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// Class constant name consists of OS platform and CPU architecture.
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//
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// For ports created before Firebird 2.0 release 64-bit and 32-bit
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// sub-architectures of the same CPU should use different classes.
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// For 64-bit ports first created after or as a part of Firebird 2.0
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// release CPU architecture may be the same for both variants.
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static const int CLASS_UNKNOWN = 0;
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//static const CLASS_APOLLO_68K = 1; // Apollo 68K, Dn 10K
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static const int CLASS_SOLARIS_SPARC = 2; // Sun 68k, Sun Sparc, HP 9000/300, MAC AUX, IMP, DELTA, NeXT, UNIXWARE, DG_X86
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static const int CLASS_SOLARIS_I386 = 3; // Sun 386i
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//static const CLASS_VMS_VAX = 4; // VMS/VAX
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//static const CLASS_ULTRIX_VAX = 5; // Ultrix/VAX
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//static const CLASS_ULTRIX_MIPS = 6; // Ultrix/MIPS
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static const int CLASS_HPUX_PA = 7; // HP-UX on PA-RISC (was: HP 900/800 (precision))
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static const int CLASS_NETWARE_I386 = 8; // NetWare
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//static const CLASS_MAC_OS = 9; // MAC-OS
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static const int CLASS_AIX_PPC = 10; // AIX on PowerPC platform (was: IBM RS/6000)
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//static const CLASS_DG_AVIION = 11; // DG AViiON
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//static const CLASS_MPE_XL = 12; // MPE/XL
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static const int CLASS_IRIX_MIPS = 13; // Silicon Graphics/IRIS
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//static const int CLASS_CRAY = 14; // Cray
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static const int CLASS_TRU64_ALPHA = 15; // Tru64 Unix running on Alpha (was: Dec OSF/1)
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static const int CLASS_WINDOWS_I386 = 16; // NT -- post 4.0 (delivered 4.0 as class 8)
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//static const CLASS_OS2 = 17; // OS/2
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//static const CLASS_WIN16 = 18; // Windows 16 bit
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static const int CLASS_LINUX_I386 = 19; // LINUX on Intel series
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static const int CLASS_LINUX_SPARC = 20; // LINUX on sparc systems
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static const int CLASS_FREEBSD_I386 = 21; // FreeBSD/i386
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static const int CLASS_NETBSD_I386 = 22; // NetBSD/i386
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static const int CLASS_DARWIN_PPC = 23; // Darwin/PowerPC
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static const int CLASS_LINUX_AMD64 = 24; // LINUX on AMD64 systems
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static const int CLASS_FREEBSD_AMD64 = 25;// FreeBSD/amd64
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static const int CLASS_WINDOWS_AMD64 = 26;// Windows/amd64
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static const int CLASS_LINUX_PPC = 27; // LINUX/PowerPC
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static const int CLASS_DARWIN_I386 = 28; //Darwin/Intel
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static const int CLASS_LINUX_MIPSEL = 29; // LINUX/MIPS
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static const int CLASS_MAX10 = CLASS_LINUX_AMD64; // This should not be changed, no new ports with ODS10
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static const int CLASS_MAX = CLASS_LINUX_MIPSEL;
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// ARCHITECTURE COMPATIBILITY CLASSES
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// For ODS10 and earlier things which normally define ODS compatibility are:
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// 1) endianness (big-endian/little-endian)
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// 2) alignment (32-bit or 64-bit), matters for record formats
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// 3) pointer size (32-bit or 64-bit), also matters for record formats
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//
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// For ODS11 pointers are not stored in database and alignment is always 64-bit.
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// So the only thing which normally matters for ODS11 is endiannes, but if
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// endianness is wrong we are going to notice it during ODS version check,
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// before architecture compatibility is tested. But we distinguish them here too,
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// for consistency.
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enum ArchitectureType {
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archUnknown, // Unknown architecture, allow opening database only if CLASS matches exactly
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archIntel86, // Little-endian platform with 32-bit pointers and 32-bit alignment (ODS10)
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archLittleEndian, // Any little-endian platform with standard layout of data
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archBigEndian // Any big-endian platform with standard layout of data
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};
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// Note that Sparc, HP and PowerPC disk structures should be compatible in theory,
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// but in practice alignment on these platforms varies and actually depends on the
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// compiler used to produce the build. Yes, some 32-bit RISC builds use 64-bit alignment.
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// This is why we declare all such builds "Unknown" for ODS10.
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static ArchitectureType archMatrix10[CLASS_MAX10 + 1] = {
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archUnknown, // CLASS_UNKNOWN
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archUnknown, // CLASS_APOLLO_68K
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archUnknown, // CLASS_SOLARIS_SPARC
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archIntel86, // CLASS_SOLARIS_I386
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archUnknown, // CLASS_VMS_VAX
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archUnknown, // CLASS_ULTRIX_VAX
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archUnknown, // CLASS_ULTRIX_MIPS
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archUnknown, // CLASS_HPUX_PA
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archUnknown, // CLASS_NETWARE_I386
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archUnknown, // CLASS_MAC_OS
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archUnknown, // CLASS_AIX_PPC
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archUnknown, // CLASS_DG_AVIION
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archUnknown, // CLASS_MPE_XL
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archUnknown, // CLASS_IRIX_MIPS
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archUnknown, // CLASS_CRAY
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archUnknown, // CLASS_TRU64_ALPHA
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archIntel86, // CLASS_WINDOWS_I386
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archUnknown, // CLASS_OS2
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archUnknown, // CLASS_WIN16
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archIntel86, // CLASS_LINUX_I386
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archUnknown, // CLASS_LINUX_SPARC
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archIntel86, // CLASS_FREEBSD_I386
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archIntel86, // CLASS_NETBSD_I386
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archUnknown, // CLASS_DARWIN_PPC
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archUnknown // CLASS_LINUX_AMD64
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};
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static ArchitectureType archMatrix[CLASS_MAX + 1] = {
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archUnknown, // CLASS_UNKNOWN
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archUnknown, // CLASS_APOLLO_68K
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archBigEndian, // CLASS_SOLARIS_SPARC
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archLittleEndian, // CLASS_SOLARIS_I386
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archUnknown, // CLASS_VMS_VAX
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archUnknown, // CLASS_ULTRIX_VAX
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archUnknown, // CLASS_ULTRIX_MIPS
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archBigEndian, // CLASS_HPUX_PA
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archUnknown, // CLASS_NETWARE_I386
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archUnknown, // CLASS_MAC_OS
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archBigEndian, // CLASS_AIX_PPC
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archUnknown, // CLASS_DG_AVIION
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archUnknown, // CLASS_MPE_XL
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archBigEndian, // CLASS_IRIX_MIPS
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archUnknown, // CLASS_CRAY
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archBigEndian, // CLASS_TRU64_ALPHA
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archLittleEndian, // CLASS_WINDOWS_I386
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archUnknown, // CLASS_OS2
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archUnknown, // CLASS_WIN16
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archLittleEndian, // CLASS_LINUX_I386
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archBigEndian, // CLASS_LINUX_SPARC
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archLittleEndian, // CLASS_FREEBSD_I386
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archLittleEndian, // CLASS_NETBSD_I386
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archBigEndian, // CLASS_DARWIN_PPC
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archLittleEndian, // CLASS_LINUX_AMD64
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archLittleEndian, // CLASS_FREEBSD_AMD64
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archLittleEndian, // CLASS_WINDOWS_AMD64
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archBigEndian, // CLASS_LINUX_PPC
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archLittleEndian, // CLASS_DARWIN_I386
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archLittleEndian // CLASS_LINUX_MIPSEL
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};
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#ifdef sun
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#ifdef i386
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const SSHORT CLASS = CLASS_SOLARIS_I386;
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#else
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const SSHORT CLASS = CLASS_SOLARIS_SPARC;
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#endif
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#endif
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#ifdef hpux
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const SSHORT CLASS = CLASS_HPUX_PA;
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#endif
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#ifdef VMS
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const SSHORT CLASS = CLASS_VMS_VAX;
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#endif
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| 257 |
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#ifdef AIX
|
| 259 |
const SSHORT CLASS = CLASS_AIX_PPC;
|
| 260 |
#endif
|
| 261 |
|
| 262 |
#ifdef AIX_PPC
|
| 263 |
const SSHORT CLASS = CLASS_AIX_PPC;
|
| 264 |
#endif
|
| 265 |
|
| 266 |
#ifdef WIN_NT
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| 267 |
#if defined(I386)
|
| 268 |
const SSHORT CLASS = CLASS_WINDOWS_I386;
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| 269 |
#elif defined(AMD64)
|
| 270 |
const SSHORT CLASS = CLASS_WINDOWS_AMD64;
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| 271 |
#else
|
| 272 |
#error no support on other hardware for Windows
|
| 273 |
#endif
|
| 274 |
#endif // WIN_NT
|
| 275 |
|
| 276 |
#ifdef SINIXZ
|
| 277 |
const SSHORT CLASS = CLASS_LINUX_I386;
|
| 278 |
#endif
|
| 279 |
|
| 280 |
#ifdef LINUX
|
| 281 |
#if defined(i386) || defined(i586)
|
| 282 |
const SSHORT CLASS = CLASS_LINUX_I386;
|
| 283 |
#elif defined(sparc)
|
| 284 |
const SSHORT CLASS = CLASS_LINUX_SPARC;
|
| 285 |
#elif defined(AMD64)
|
| 286 |
const SSHORT CLASS = CLASS_LINUX_AMD64;
|
| 287 |
#elif defined(PPC)
|
| 288 |
const SSHORT CLASS = CLASS_LINUX_PPC;
|
| 289 |
#elif defined(MIPSEL)
|
| 290 |
const SSHORT CLASS = CLASS_LINUX_MIPSEL;
|
| 291 |
#else
|
| 292 |
#error no support on other hardware for Linux
|
| 293 |
#endif
|
| 294 |
#endif // LINUX
|
| 295 |
|
| 296 |
#ifdef FREEBSD
|
| 297 |
#if defined(i386)
|
| 298 |
const SSHORT CLASS = CLASS_FREEBSD_I386;
|
| 299 |
#elif defined(AMD64)
|
| 300 |
const SSHORT CLASS = CLASS_FREEBSD_AMD64;
|
| 301 |
#else
|
| 302 |
#error no support on other hardware for FreeBSD
|
| 303 |
#endif
|
| 304 |
#endif
|
| 305 |
|
| 306 |
#ifdef NETBSD
|
| 307 |
const SSHORT CLASS = CLASS_NETBSD_I386;
|
| 308 |
#endif
|
| 309 |
|
| 310 |
#ifdef DARWIN
|
| 311 |
#ifdef i386
|
| 312 |
const SSHORT CLASS = CLASS_DARWIN_I386;
|
| 313 |
#endif
|
| 314 |
#ifdef powerpc
|
| 315 |
const SSHORT CLASS = CLASS_DARWIN_PPC;
|
| 316 |
#endif
|
| 317 |
#endif
|
| 318 |
static const char* const SCRATCH = "fb_table_";
|
| 319 |
|
| 320 |
// CVC: Since nobody checks the result from this function (strange!), I changed
|
| 321 |
// bool to void as the return type but left the result returned as comment.
|
| 322 |
void PAG_add_clump(
|
| 323 |
SLONG page_num,
|
| 324 |
USHORT type,
|
| 325 |
USHORT len, const UCHAR* entry, USHORT mode, USHORT must_write)
|
| 326 |
{
|
| 327 |
/***********************************************
|
| 328 |
*
|
| 329 |
* P A G _ a d d _ c l u m p
|
| 330 |
*
|
| 331 |
***********************************************
|
| 332 |
*
|
| 333 |
* Functional description
|
| 334 |
* Adds a clump to log/header page.
|
| 335 |
* mode
|
| 336 |
* 0 - add CLUMP_ADD
|
| 337 |
* 1 - replace CLUMP_REPLACE
|
| 338 |
* 2 - replace only! CLUMP_REPLACE_ONLY
|
| 339 |
* returns
|
| 340 |
* true - modified page
|
| 341 |
* false - nothing done => nobody checks this function's result.
|
| 342 |
*
|
| 343 |
**************************************/
|
| 344 |
thread_db* tdbb = JRD_get_thread_data();
|
| 345 |
Database* dbb = tdbb->tdbb_database;
|
| 346 |
CHECK_DBB(dbb);
|
| 347 |
|
| 348 |
err_post_if_database_is_readonly(dbb);
|
| 349 |
|
| 350 |
pag* page;
|
| 351 |
header_page* header = 0;
|
| 352 |
log_info_page* logp = 0;
|
| 353 |
USHORT* end_addr;
|
| 354 |
WIN window(DB_PAGE_SPACE, page_num);
|
| 355 |
if (page_num == HEADER_PAGE) {
|
| 356 |
page = CCH_FETCH(tdbb, &window, LCK_write, pag_header);
|
| 357 |
header = (header_page*) page;
|
| 358 |
end_addr = &header->hdr_end;
|
| 359 |
}
|
| 360 |
else {
|
| 361 |
page = CCH_FETCH(tdbb, &window, LCK_write, pag_log);
|
| 362 |
logp = (log_info_page*) page;
|
| 363 |
end_addr = &logp->log_end;
|
| 364 |
}
|
| 365 |
|
| 366 |
UCHAR* entry_p;
|
| 367 |
const UCHAR* clump_end;
|
| 368 |
while (mode != CLUMP_ADD) {
|
| 369 |
const bool found =
|
| 370 |
find_type(page_num, &window, &page, LCK_write, type,
|
| 371 |
&entry_p, &clump_end);
|
| 372 |
|
| 373 |
/* If we did'nt find it and it is REPLACE_ONLY, return */
|
| 374 |
|
| 375 |
if ((!found) && (mode == CLUMP_REPLACE_ONLY)) {
|
| 376 |
CCH_RELEASE(tdbb, &window);
|
| 377 |
return; //false;
|
| 378 |
}
|
| 379 |
|
| 380 |
/* If not found, just go and add the entry */
|
| 381 |
|
| 382 |
if (!found)
|
| 383 |
break;
|
| 384 |
|
| 385 |
/* if same size, overwrite it */
|
| 386 |
|
| 387 |
if (entry_p[1] == len) {
|
| 388 |
entry_p += 2;
|
| 389 |
const UCHAR* r = entry;
|
| 390 |
USHORT l = len;
|
| 391 |
if (l) {
|
| 392 |
if (must_write)
|
| 393 |
CCH_MARK_MUST_WRITE(tdbb, &window);
|
| 394 |
else
|
| 395 |
CCH_MARK(tdbb, &window);
|
| 396 |
do {
|
| 397 |
*entry_p++ = *r++;
|
| 398 |
} while (--l);
|
| 399 |
|
| 400 |
}
|
| 401 |
CCH_RELEASE(tdbb, &window);
|
| 402 |
return; // true;
|
| 403 |
}
|
| 404 |
|
| 405 |
/* delete the entry
|
| 406 |
|
| 407 |
* Page is marked must write because of precedence problems. Later
|
| 408 |
* on we may allocate a new page and set up a precedence relationship.
|
| 409 |
* This may be the lower precedence page and so it cannot be dirty
|
| 410 |
*/
|
| 411 |
|
| 412 |
CCH_MARK_MUST_WRITE(tdbb, &window);
|
| 413 |
|
| 414 |
*end_addr -= (2 + entry_p[1]);
|
| 415 |
|
| 416 |
const UCHAR* r = entry_p + 2 + entry_p[1];
|
| 417 |
USHORT l = clump_end - r + 1;
|
| 418 |
|
| 419 |
if (l) {
|
| 420 |
do {
|
| 421 |
*entry_p++ = *r++;
|
| 422 |
} while (--l);
|
| 423 |
}
|
| 424 |
|
| 425 |
CCH_RELEASE(tdbb, &window);
|
| 426 |
|
| 427 |
/* refetch the page */
|
| 428 |
|
| 429 |
window.win_page = page_num;
|
| 430 |
if (page_num == HEADER_PAGE) {
|
| 431 |
page = CCH_FETCH(tdbb, &window, LCK_write, pag_header);
|
| 432 |
header = (header_page*) page;
|
| 433 |
end_addr = &header->hdr_end;
|
| 434 |
}
|
| 435 |
else {
|
| 436 |
page = CCH_FETCH(tdbb, &window, LCK_write, pag_log);
|
| 437 |
logp = (log_info_page*) page;
|
| 438 |
end_addr = &logp->log_end;
|
| 439 |
}
|
| 440 |
break;
|
| 441 |
}
|
| 442 |
|
| 443 |
/* Add the entry */
|
| 444 |
|
| 445 |
find_clump_space(page_num, &window, &page, type, len, entry, must_write);
|
| 446 |
|
| 447 |
CCH_RELEASE(tdbb, &window);
|
| 448 |
return; // true;
|
| 449 |
}
|
| 450 |
|
| 451 |
|
| 452 |
USHORT PAG_add_file(const TEXT* file_name, SLONG start)
|
| 453 |
{
|
| 454 |
/**************************************
|
| 455 |
*
|
| 456 |
* P A G _ a d d _ f i l e
|
| 457 |
*
|
| 458 |
**************************************
|
| 459 |
*
|
| 460 |
* Functional description
|
| 461 |
* Add a file to the current database. Return the sequence
|
| 462 |
* number for the new file.
|
| 463 |
*
|
| 464 |
**************************************/
|
| 465 |
thread_db* tdbb = JRD_get_thread_data();
|
| 466 |
Database* dbb = tdbb->tdbb_database;
|
| 467 |
CHECK_DBB(dbb);
|
| 468 |
|
| 469 |
err_post_if_database_is_readonly(dbb);
|
| 470 |
|
| 471 |
/* Find current last file */
|
| 472 |
|
| 473 |
PageSpace* pageSpace = dbb->dbb_page_manager.findPageSpace(DB_PAGE_SPACE);
|
| 474 |
jrd_file* file = pageSpace->file;
|
| 475 |
while (file->fil_next) {
|
| 476 |
file = file->fil_next;
|
| 477 |
}
|
| 478 |
|
| 479 |
// Verify database file path against DatabaseAccess entry of firebird.conf
|
| 480 |
if (!ISC_verify_database_access(file_name)) {
|
| 481 |
ERR_post(isc_conf_access_denied,
|
| 482 |
isc_arg_string, "additional database file",
|
| 483 |
isc_arg_string, ERR_cstring(file_name),
|
| 484 |
isc_arg_end);
|
| 485 |
}
|
| 486 |
|
| 487 |
/* Create the file. If the sequence number comes back zero, it didn't
|
| 488 |
work, so punt */
|
| 489 |
|
| 490 |
const USHORT sequence = PIO_add_file(dbb, pageSpace->file, file_name, start);
|
| 491 |
if (!sequence)
|
| 492 |
return 0;
|
| 493 |
|
| 494 |
/* Create header page for new file */
|
| 495 |
|
| 496 |
jrd_file* next = file->fil_next;
|
| 497 |
|
| 498 |
if (dbb->dbb_flags & DBB_force_write)
|
| 499 |
PIO_force_write(next, true);
|
| 500 |
|
| 501 |
WIN window(DB_PAGE_SPACE, next->fil_min_page);
|
| 502 |
header_page* header = (header_page*) CCH_fake(tdbb, &window, 1);
|
| 503 |
header->hdr_header.pag_type = pag_header;
|
| 504 |
header->hdr_sequence = sequence;
|
| 505 |
header->hdr_page_size = dbb->dbb_page_size;
|
| 506 |
header->hdr_data[0] = HDR_end;
|
| 507 |
header->hdr_end = HDR_SIZE;
|
| 508 |
next->fil_sequence = sequence;
|
| 509 |
|
| 510 |
#ifdef SUPPORT_RAW_DEVICES
|
| 511 |
/* The following lines (taken from PAG_format_header) are needed to identify
|
| 512 |
this file in raw_devices_validate_database as a valid database attachment. */
|
| 513 |
*(ISC_TIMESTAMP*)header->hdr_creation_date = Firebird::TimeStamp().value();
|
| 514 |
// should we include milliseconds or not?
|
| 515 |
//Firebird::TimeStamp::round_time(header->hdr_creation_date->timestamp_time, 0);
|
| 516 |
|
| 517 |
header->hdr_ods_version = ODS_VERSION | ODS_FIREBIRD_FLAG;
|
| 518 |
header->hdr_implementation = CLASS;
|
| 519 |
header->hdr_ods_minor = ODS_CURRENT;
|
| 520 |
header->hdr_ods_minor_original = ODS_CURRENT;
|
| 521 |
if (dbb->dbb_flags & DBB_DB_SQL_dialect_3)
|
| 522 |
header->hdr_flags |= hdr_SQL_dialect_3;
|
| 523 |
#endif
|
| 524 |
|
| 525 |
header->hdr_header.pag_checksum = CCH_checksum(window.win_bdb);
|
| 526 |
PIO_write(pageSpace->file, window.win_bdb, window.win_buffer,
|
| 527 |
tdbb->tdbb_status_vector);
|
| 528 |
CCH_RELEASE(tdbb, &window);
|
| 529 |
next->fil_fudge = 1;
|
| 530 |
|
| 531 |
/* Update the previous header page to point to new file */
|
| 532 |
|
| 533 |
file->fil_fudge = 0;
|
| 534 |
window.win_page = file->fil_min_page;
|
| 535 |
header = (header_page*) CCH_FETCH(tdbb, &window, LCK_write, pag_header);
|
| 536 |
if (!file->fil_min_page)
|
| 537 |
CCH_MARK_MUST_WRITE(tdbb, &window);
|
| 538 |
else
|
| 539 |
CCH_MARK(tdbb, &window);
|
| 540 |
|
| 541 |
--start;
|
| 542 |
|
| 543 |
if (file->fil_min_page) {
|
| 544 |
PAG_add_header_entry(header, HDR_file, strlen(file_name),
|
| 545 |
reinterpret_cast<const UCHAR*>(file_name));
|
| 546 |
PAG_add_header_entry(header, HDR_last_page, sizeof(SLONG),
|
| 547 |
(UCHAR *) & start);
|
| 548 |
}
|
| 549 |
else {
|
| 550 |
PAG_add_clump(HEADER_PAGE, HDR_file, strlen(file_name),
|
| 551 |
reinterpret_cast<const UCHAR*>(file_name), CLUMP_REPLACE, 1);
|
| 552 |
PAG_add_clump(HEADER_PAGE, HDR_last_page, sizeof(SLONG),
|
| 553 |
(UCHAR *) & start, CLUMP_REPLACE, 1);
|
| 554 |
}
|
| 555 |
|
| 556 |
header->hdr_header.pag_checksum = CCH_checksum(window.win_bdb);
|
| 557 |
PIO_write(pageSpace->file, window.win_bdb, window.win_buffer,
|
| 558 |
tdbb->tdbb_status_vector);
|
| 559 |
CCH_RELEASE(tdbb, &window);
|
| 560 |
if (file->fil_min_page)
|
| 561 |
file->fil_fudge = 1;
|
| 562 |
|
| 563 |
return sequence;
|
| 564 |
}
|
| 565 |
|
| 566 |
|
| 567 |
int PAG_add_header_entry(header_page* header, USHORT type, SSHORT len, const UCHAR* entry)
|
| 568 |
{
|
| 569 |
/***********************************************
|
| 570 |
*
|
| 571 |
* P A G _ a d d _ h e a d e r _ e n t r y
|
| 572 |
*
|
| 573 |
***********************************************
|
| 574 |
*
|
| 575 |
* Functional description
|
| 576 |
* Add an entry to header page.
|
| 577 |
* This will be used mainly for the shadow header page and adding
|
| 578 |
* secondary files.
|
| 579 |
* Will not follow to hdr_next_page
|
| 580 |
* Will not journal changes made to page. => obsolete
|
| 581 |
* RETURNS
|
| 582 |
* TRUE - modified page
|
| 583 |
* FALSE - nothing done
|
| 584 |
*
|
| 585 |
**************************************/
|
| 586 |
thread_db* tdbb = JRD_get_thread_data();
|
| 587 |
Database* dbb = tdbb->tdbb_database;
|
| 588 |
CHECK_DBB(dbb);
|
| 589 |
|
| 590 |
err_post_if_database_is_readonly(dbb);
|
| 591 |
|
| 592 |
const UCHAR* q = entry;
|
| 593 |
|
| 594 |
UCHAR* p;
|
| 595 |
for (p = header->hdr_data; ((*p != HDR_end) && (*p != type));
|
| 596 |
p += 2 + p[1]);
|
| 597 |
|
| 598 |
if (*p != HDR_end)
|
| 599 |
return FALSE;
|
| 600 |
|
| 601 |
/* We are at HDR_end, add the entry */
|
| 602 |
|
| 603 |
const int free_space = dbb->dbb_page_size - header->hdr_end;
|
| 604 |
|
| 605 |
if (free_space > (2 + len)) {
|
| 606 |
fb_assert(type <= MAX_UCHAR);
|
| 607 |
fb_assert(len <= MAX_UCHAR);
|
| 608 |
*p++ = static_cast<UCHAR>(type);
|
| 609 |
*p++ = static_cast<UCHAR>(len);
|
| 610 |
|
| 611 |
if (len) {
|
| 612 |
if (q) {
|
| 613 |
do {
|
| 614 |
*p++ = *q++;
|
| 615 |
} while (--len);
|
| 616 |
}
|
| 617 |
else {
|
| 618 |
do {
|
| 619 |
*p++ = 0;
|
| 620 |
} while (--len);
|
| 621 |
}
|
| 622 |
}
|
| 623 |
|
| 624 |
*p = HDR_end;
|
| 625 |
|
| 626 |
header->hdr_end = p - (UCHAR *) header;
|
| 627 |
|
| 628 |
return TRUE;
|
| 629 |
}
|
| 630 |
|
| 631 |
BUGCHECK(251);
|
| 632 |
return FALSE; /* Added to remove compiler warning */
|
| 633 |
}
|
| 634 |
|
| 635 |
|
| 636 |
void PAG_attach_temp_pages(thread_db* tdbb, USHORT pageSpaceID)
|
| 637 |
{
|
| 638 |
/***********************************************
|
| 639 |
*
|
| 640 |
* P A G _ a t t a c h _ t e m p _ p a g e s
|
| 641 |
*
|
| 642 |
***********************************************
|
| 643 |
*
|
| 644 |
* Functional description
|
| 645 |
* Attach a temporary page space
|
| 646 |
*
|
| 647 |
**************************************/
|
| 648 |
SET_TDBB(tdbb);
|
| 649 |
Database* dbb = tdbb->tdbb_database;
|
| 650 |
CHECK_DBB(dbb);
|
| 651 |
|
| 652 |
PageSpace* pageSpaceTemp = dbb->dbb_page_manager.addPageSpace(pageSpaceID);
|
| 653 |
if (!pageSpaceTemp->file)
|
| 654 |
{
|
| 655 |
Firebird::PathName file_name = TempFile::create(SCRATCH);
|
| 656 |
pageSpaceTemp->file = PIO_create(dbb, file_name, true, true, false);
|
| 657 |
PAG_format_pip(tdbb, *pageSpaceTemp);
|
| 658 |
}
|
| 659 |
}
|
| 660 |
|
| 661 |
|
| 662 |
int PAG_replace_entry_first(header_page* header, USHORT type, SSHORT len, const UCHAR* entry)
|
| 663 |
{
|
| 664 |
/***********************************************
|
| 665 |
*
|
| 666 |
* P A G _ r e p l a c e _ e n t r y _ f i r s t
|
| 667 |
*
|
| 668 |
***********************************************
|
| 669 |
*
|
| 670 |
* Functional description
|
| 671 |
* Replace an entry in the header page so it will become first entry
|
| 672 |
* This will be used mainly for the clumplets used for backup purposes
|
| 673 |
* because they are needed to be read without page lock
|
| 674 |
* Will not follow to hdr_next_page
|
| 675 |
* Will not journal changes made to page. => obsolete
|
| 676 |
* RETURNS
|
| 677 |
* TRUE - modified page
|
| 678 |
* FALSE - nothing done
|
| 679 |
*
|
| 680 |
**************************************/
|
| 681 |
thread_db* tdbb = JRD_get_thread_data();
|
| 682 |
Database* dbb = tdbb->tdbb_database;
|
| 683 |
CHECK_DBB(dbb);
|
| 684 |
|
| 685 |
err_post_if_database_is_readonly(dbb);
|
| 686 |
|
| 687 |
const UCHAR* q = entry;
|
| 688 |
|
| 689 |
UCHAR* p = header->hdr_data;
|
| 690 |
while ((*p != HDR_end) && (*p != type)) {
|
| 691 |
p += 2 + p[1];
|
| 692 |
}
|
| 693 |
|
| 694 |
// Remove item if found it somewhere
|
| 695 |
if (*p != HDR_end) {
|
| 696 |
UCHAR l = p[1] + 2;
|
| 697 |
memmove(p, p + l,
|
| 698 |
header->hdr_end - (p - (UCHAR*)header) - l + 1/*to preserve HDR_end*/);
|
| 699 |
header->hdr_end -= l;
|
| 700 |
}
|
| 701 |
|
| 702 |
|
| 703 |
if (!entry) {
|
| 704 |
return FALSE; // We were asked just to remove item. We finished.
|
| 705 |
}
|
| 706 |
|
| 707 |
// Check if we got enough space
|
| 708 |
if (dbb->dbb_page_size - header->hdr_end <= len + 2) {
|
| 709 |
BUGCHECK(251);
|
| 710 |
}
|
| 711 |
|
| 712 |
// Actually add the item
|
| 713 |
memmove(header->hdr_data + len + 2, header->hdr_data, header->hdr_end - HDR_SIZE + 1);
|
| 714 |
header->hdr_data[0] = type;
|
| 715 |
header->hdr_data[1] = len;
|
| 716 |
memcpy(header->hdr_data + 2, entry, len);
|
| 717 |
header->hdr_end += len + 2;
|
| 718 |
|
| 719 |
return TRUE;
|
| 720 |
}
|
| 721 |
|
| 722 |
PAG PAG_allocate(WIN * window)
|
| 723 |
{
|
| 724 |
/**************************************
|
| 725 |
*
|
| 726 |
* P A G _ a l l o c a t e
|
| 727 |
*
|
| 728 |
**************************************
|
| 729 |
*
|
| 730 |
* Functional description
|
| 731 |
* Allocate a page and fake a read with a write lock. This is
|
| 732 |
* the universal sequence when allocating pages.
|
| 733 |
*
|
| 734 |
**************************************/
|
| 735 |
thread_db* tdbb = JRD_get_thread_data();
|
| 736 |
Database* dbb = tdbb->tdbb_database;
|
| 737 |
CHECK_DBB(dbb);
|
| 738 |
|
| 739 |
PageManager& pageMgr = dbb->dbb_page_manager;
|
| 740 |
PageSpace* pageSpace = pageMgr.findPageSpace(
|
| 741 |
window->win_page.getPageSpaceID());
|
| 742 |
fb_assert(pageSpace);
|
| 743 |
|
| 744 |
// Not sure if this can be moved inside the loop. Maybe some data members
|
| 745 |
// should persist across iterations?
|
| 746 |
WIN pip_window(pageSpace->pageSpaceID, -1);
|
| 747 |
// CVC: Not sure of the initial value. Notice bytes and bit are used after the loop.
|
| 748 |
UCHAR* bytes = 0;
|
| 749 |
UCHAR bit = 0;
|
| 750 |
|
| 751 |
pag* new_page = 0; // NULL before the search for a new page.
|
| 752 |
|
| 753 |
/* Find an allocation page with something on it */
|
| 754 |
|
| 755 |
SLONG relative_bit = -1;
|
| 756 |
SLONG sequence;
|
| 757 |
for (sequence = pageSpace->pipHighWater;; sequence++) {
|
| 758 |
pip_window.win_page = (sequence == 0) ?
|
| 759 |
pageSpace->ppFirst : sequence * dbb->dbb_page_manager.pagesPerPIP - 1;
|
| 760 |
page_inv_page* pip_page =
|
| 761 |
(page_inv_page*) CCH_FETCH(tdbb, &pip_window, LCK_write, pag_pages);
|
| 762 |
const UCHAR* end = (UCHAR*) pip_page + dbb->dbb_page_size;
|
| 763 |
for (bytes = &pip_page->pip_bits[pip_page->pip_min >> 3]; bytes < end;
|
| 764 |
bytes++)
|
| 765 |
{
|
| 766 |
if (*bytes != 0) {
|
| 767 |
/* 'byte' is not zero, so it describes at least one free page. */
|
| 768 |
bit = 1;
|
| 769 |
for (SLONG i = 0; i < 8; i++, bit <<= 1) {
|
| 770 |
if (bit & *bytes) {
|
| 771 |
relative_bit =
|
| 772 |
((bytes - pip_page->pip_bits) << 3) + i;
|
| 773 |
window->win_page =
|
| 774 |
relative_bit + sequence * pageMgr.pagesPerPIP;
|
| 775 |
new_page = CCH_fake(tdbb, window, 0); /* don't wait on latch */
|
| 776 |
if (new_page)
|
| 777 |
break; /* Found a page and successfully fake-ed it */
|
| 778 |
}
|
| 779 |
}
|
| 780 |
}
|
| 781 |
if (new_page)
|
| 782 |
break; /* Found a page and successfully fake-ed it */
|
| 783 |
}
|
| 784 |
if (new_page)
|
| 785 |
break; /* Found a page and successfully fake-ed it */
|
| 786 |
CCH_RELEASE(tdbb, &pip_window);
|
| 787 |
}
|
| 788 |
|
| 789 |
pageSpace->pipHighWater = sequence;
|
| 790 |
|
| 791 |
CCH_MARK(tdbb, &pip_window);
|
| 792 |
*bytes &= ~bit;
|
| 793 |
|
| 794 |
if (relative_bit != pageMgr.pagesPerPIP - 1) {
|
| 795 |
CCH_RELEASE(tdbb, &pip_window);
|
| 796 |
CCH_precedence(tdbb, window, pip_window.win_page);
|
| 797 |
#ifdef VIO_DEBUG
|
| 798 |
if (debug_flag > DEBUG_WRITES_INFO)
|
| 799 |
printf("\tPAG_allocate: allocated page %"SLONGFORMAT"\n",
|
| 800 |
window->win_page);
|
| 801 |
#endif
|
| 802 |
return new_page;
|
| 803 |
}
|
| 804 |
|
| 805 |
/* We've allocated the last page on the space management page. Rather
|
| 806 |
than returning it, format it as a page inventory page, and recurse. */
|
| 807 |
|
| 808 |
page_inv_page* new_pip_page = (page_inv_page*) new_page;
|
| 809 |
new_pip_page->pip_header.pag_type = pag_pages;
|
| 810 |
// CVC: If some tips on web sites are true, this can be improved by
|
| 811 |
// a pointer to ULONG setting memory to 0xffffffff.
|
| 812 |
const UCHAR* end = (UCHAR *) new_pip_page + dbb->dbb_page_size;
|
| 813 |
for (bytes = new_pip_page->pip_bits; bytes < end;)
|
| 814 |
*bytes++ = 0xff;
|
| 815 |
|
| 816 |
CCH_must_write(window);
|
| 817 |
CCH_RELEASE(tdbb, window);
|
| 818 |
CCH_must_write(&pip_window);
|
| 819 |
CCH_RELEASE(tdbb, &pip_window);
|
| 820 |
|
| 821 |
return PAG_allocate(window);
|
| 822 |
}
|
| 823 |
|
| 824 |
|
| 825 |
SLONG PAG_attachment_id(thread_db* tdbb)
|
| 826 |
{
|
| 827 |
/******************************************
|
| 828 |
*
|
| 829 |
* P A G _ a t t a c h m e n t _ i d
|
| 830 |
*
|
| 831 |
******************************************
|
| 832 |
*
|
| 833 |
* Functional description
|
| 834 |
* Get attachment id. If don't have one, get one. As a side
|
| 835 |
* effect, get a lock on it as well.
|
| 836 |
*
|
| 837 |
******************************************/
|
| 838 |
SET_TDBB(tdbb);
|
| 839 |
Database* dbb = tdbb->tdbb_database;
|
| 840 |
|
| 841 |
Attachment* attachment = tdbb->tdbb_attachment;
|
| 842 |
WIN window(DB_PAGE_SPACE, -1);
|
| 843 |
|
| 844 |
/* If we've been here before just return the id */
|
| 845 |
|
| 846 |
if (attachment->att_id_lock)
|
| 847 |
return attachment->att_attachment_id;
|
| 848 |
|
| 849 |
/* Get new attachment id */
|
| 850 |
|
| 851 |
if (dbb->dbb_flags & DBB_read_only) {
|
| 852 |
attachment->att_attachment_id = ++dbb->dbb_attachment_id;
|
| 853 |
}
|
| 854 |
else {
|
| 855 |
window.win_page = HEADER_PAGE_NUMBER;
|
| 856 |
header_page* header = (header_page*) CCH_FETCH(tdbb, &window, LCK_write, pag_header);
|
| 857 |
CCH_MARK(tdbb, &window);
|
| 858 |
attachment->att_attachment_id = ++header->hdr_attachment_id;
|
| 859 |
|
| 860 |
CCH_RELEASE(tdbb, &window);
|
| 861 |
}
|
| 862 |
|
| 863 |
/* Take out lock on attachment id */
|
| 864 |
|
| 865 |
Lock* lock = FB_NEW_RPT(*dbb->dbb_permanent, sizeof(SLONG)) Lock();
|
| 866 |
attachment->att_id_lock = lock;
|
| 867 |
lock->lck_type = LCK_attachment;
|
| 868 |
lock->lck_owner_handle = LCK_get_owner_handle(tdbb, lock->lck_type);
|
| 869 |
lock->lck_parent = dbb->dbb_lock;
|
| 870 |
lock->lck_length = sizeof(SLONG);
|
| 871 |
lock->lck_key.lck_long = attachment->att_attachment_id;
|
| 872 |
lock->lck_dbb = dbb;
|
| 873 |
LCK_lock(tdbb, lock, LCK_write, LCK_WAIT);
|
| 874 |
|
| 875 |
return attachment->att_attachment_id;
|
| 876 |
}
|
| 877 |
|
| 878 |
|
| 879 |
int PAG_delete_clump_entry(SLONG page_num, USHORT type)
|
| 880 |
{
|
| 881 |
/***********************************************
|
| 882 |
*
|
| 883 |
* P A G _ d e l e t e _ c l u m p _ e n t r y
|
| 884 |
*
|
| 885 |
***********************************************
|
| 886 |
*
|
| 887 |
* Functional description
|
| 888 |
* Gets rid on the entry 'type' from page.
|
| 889 |
*
|
| 890 |
**************************************/
|
| 891 |
thread_db* tdbb = JRD_get_thread_data();
|
| 892 |
Database* dbb = tdbb->tdbb_database;
|
| 893 |
CHECK_DBB(dbb);
|
| 894 |
|
| 895 |
err_post_if_database_is_readonly(dbb);
|
| 896 |
|
| 897 |
WIN window(DB_PAGE_SPACE, page_num);
|
| 898 |
|
| 899 |
pag* page;
|
| 900 |
if (page_num == HEADER_PAGE)
|
| 901 |
page = CCH_FETCH(tdbb, &window, LCK_write, pag_header);
|
| 902 |
else
|
| 903 |
page = CCH_FETCH(tdbb, &window, LCK_write, pag_log);
|
| 904 |
|
| 905 |
UCHAR* entry_p;
|
| 906 |
const UCHAR* clump_end;
|
| 907 |
if (!find_type
|
| 908 |
(page_num, &window, &page, LCK_write, type, &entry_p, &clump_end))
|
| 909 |
{
|
| 910 |
CCH_RELEASE(tdbb, &window);
|
| 911 |
return FALSE;
|
| 912 |
}
|
| 913 |
CCH_MARK(tdbb, &window);
|
| 914 |
|
| 915 |
header_page* header = 0;
|
| 916 |
log_info_page* logp = 0;
|
| 917 |
USHORT* end_addr;
|
| 918 |
if (page_num == HEADER_PAGE) {
|
| 919 |
header = (header_page*) page;
|
| 920 |
end_addr = &header->hdr_end;
|
| 921 |
}
|
| 922 |
else {
|
| 923 |
logp = (log_info_page*) page;
|
| 924 |
end_addr = &logp->log_end;
|
| 925 |
}
|
| 926 |
|
| 927 |
*end_addr -= (2 + entry_p[1]);
|
| 928 |
|
| 929 |
const UCHAR* r = entry_p + 2 + entry_p[1];
|
| 930 |
USHORT l = clump_end - r + 1;
|
| 931 |
|
| 932 |
if (l) {
|
| 933 |
do {
|
| 934 |
*entry_p++ = *r++;
|
| 935 |
} while (--l);
|
| 936 |
}
|
| 937 |
|
| 938 |
CCH_RELEASE(tdbb, &window);
|
| 939 |
|
| 940 |
return TRUE;
|
| 941 |
}
|
| 942 |
|
| 943 |
|
| 944 |
void PAG_format_header()
|
| 945 |
{
|
| 946 |
/**************************************
|
| 947 |
*
|
| 948 |
* P A G _ f o r m a t _ h e a d e r
|
| 949 |
*
|
| 950 |
**************************************
|
| 951 |
*
|
| 952 |
* Functional description
|
| 953 |
* Create the header page for a new file.
|
| 954 |
*
|
| 955 |
**************************************/
|
| 956 |
thread_db* tdbb = JRD_get_thread_data();
|
| 957 |
Database* dbb = tdbb->tdbb_database;
|
| 958 |
CHECK_DBB(dbb);
|
| 959 |
|
| 960 |
/* Initialize header page */
|
| 961 |
|
| 962 |
WIN window(HEADER_PAGE_NUMBER);
|
| 963 |
header_page* header = (header_page*) CCH_fake(tdbb, &window, 1);
|
| 964 |
header->hdr_header.pag_scn = 0;
|
| 965 |
*(ISC_TIMESTAMP*)header->hdr_creation_date = Firebird::TimeStamp().value();
|
| 966 |
// should we include milliseconds or not?
|
| 967 |
//Firebird::TimeStamp::round_time(header->hdr_creation_date->timestamp_time, 0);
|
| 968 |
header->hdr_header.pag_type = pag_header;
|
| 969 |
header->hdr_page_size = dbb->dbb_page_size;
|
| 970 |
header->hdr_ods_version = ODS_VERSION | ODS_FIREBIRD_FLAG;
|
| 971 |
header->hdr_implementation = CLASS;
|
| 972 |
header->hdr_ods_minor = ODS_CURRENT;
|
| 973 |
header->hdr_ods_minor_original = ODS_CURRENT;
|
| 974 |
header->hdr_oldest_transaction = 1;
|
| 975 |
header->hdr_bumped_transaction = 1;
|
| 976 |
header->hdr_end = HDR_SIZE;
|
| 977 |
header->hdr_data[0] = HDR_end;
|
| 978 |
#ifdef SYNC_WRITE_DEFAULT
|
| 979 |
header->hdr_flags |= hdr_force_write;
|
| 980 |
#endif
|
| 981 |
|
| 982 |
if (dbb->dbb_flags & DBB_DB_SQL_dialect_3) {
|
| 983 |
header->hdr_flags |= hdr_SQL_dialect_3;
|
| 984 |
}
|
| 985 |
|
| 986 |
dbb->dbb_ods_version = header->hdr_ods_version & ~ODS_FIREBIRD_FLAG;
|
| 987 |
dbb->dbb_minor_version = header->hdr_ods_minor;
|
| 988 |
dbb->dbb_minor_original = header->hdr_ods_minor_original;
|
| 989 |
|
| 990 |
CCH_RELEASE(tdbb, &window);
|
| 991 |
}
|
| 992 |
|
| 993 |
|
| 994 |
// CVC: This function is mostly obsolete. Ann requested to keep it and the code that calls it.
|
| 995 |
// We won't read the log, anyway.
|
| 996 |
void PAG_format_log()
|
| 997 |
{
|
| 998 |
/***********************************************
|
| 999 |
*
|
| 1000 |
* P A G _ f o r m a t _ l o g
|
| 1001 |
*
|
| 1002 |
***********************************************
|
| 1003 |
*
|
| 1004 |
* Functional description
|
| 1005 |
* Initialize log page.
|
| 1006 |
* Set all parameters to 0
|
| 1007 |
*
|
| 1008 |
**************************************/
|
| 1009 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1010 |
|
| 1011 |
WIN window(LOG_PAGE_NUMBER);
|
| 1012 |
log_info_page* logp = (log_info_page*) CCH_fake(tdbb, &window, 1);
|
| 1013 |
logp->log_header.pag_type = pag_log;
|
| 1014 |
|
| 1015 |
CCH_RELEASE(tdbb, &window);
|
| 1016 |
}
|
| 1017 |
|
| 1018 |
|
| 1019 |
void PAG_format_pip(thread_db* tdbb, PageSpace& pageSpace)
|
| 1020 |
{
|
| 1021 |
/**************************************
|
| 1022 |
*
|
| 1023 |
* P A G _ f o r m a t _ p i p
|
| 1024 |
*
|
| 1025 |
**************************************
|
| 1026 |
*
|
| 1027 |
* Functional description
|
| 1028 |
* Create a page inventory page to
|
| 1029 |
* complete the formatting of a new file
|
| 1030 |
* into a rudimentary database.
|
| 1031 |
*
|
| 1032 |
**************************************/
|
| 1033 |
SET_TDBB(tdbb);
|
| 1034 |
Database* dbb = tdbb->tdbb_database;
|
| 1035 |
CHECK_DBB(dbb);
|
| 1036 |
|
| 1037 |
/* Initialize Page Inventory Page */
|
| 1038 |
|
| 1039 |
WIN window(pageSpace.pageSpaceID, 1);
|
| 1040 |
pageSpace.ppFirst = 1;
|
| 1041 |
page_inv_page* pages = (page_inv_page*) CCH_fake(tdbb, &window, 1);
|
| 1042 |
|
| 1043 |
pages->pip_header.pag_type = pag_pages;
|
| 1044 |
pages->pip_min = 4;
|
| 1045 |
UCHAR* p = pages->pip_bits;
|
| 1046 |
int i = dbb->dbb_page_size - OFFSETA(page_inv_page*, pip_bits);
|
| 1047 |
|
| 1048 |
while (i--) {
|
| 1049 |
*p++ = 0xff;
|
| 1050 |
}
|
| 1051 |
|
| 1052 |
pages->pip_bits[0] &= ~(1 | 2 | 4);
|
| 1053 |
|
| 1054 |
CCH_RELEASE(tdbb, &window);
|
| 1055 |
}
|
| 1056 |
|
| 1057 |
|
| 1058 |
bool PAG_get_clump(SLONG page_num, USHORT type, USHORT* len, UCHAR* entry)
|
| 1059 |
{
|
| 1060 |
/***********************************************
|
| 1061 |
*
|
| 1062 |
* P A G _ g e t _ c l u m p
|
| 1063 |
*
|
| 1064 |
***********************************************
|
| 1065 |
*
|
| 1066 |
* Functional description
|
| 1067 |
* Find 'type' clump in page_num
|
| 1068 |
* true - Found it
|
| 1069 |
* false - Not present
|
| 1070 |
* RETURNS
|
| 1071 |
* value of clump in entry
|
| 1072 |
* length in len
|
| 1073 |
*
|
| 1074 |
**************************************/
|
| 1075 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1076 |
|
| 1077 |
*len = 0;
|
| 1078 |
WIN window(DB_PAGE_SPACE, page_num);
|
| 1079 |
|
| 1080 |
pag* page;
|
| 1081 |
if (page_num == HEADER_PAGE)
|
| 1082 |
page = CCH_FETCH(tdbb, &window, LCK_read, pag_header);
|
| 1083 |
else
|
| 1084 |
page = CCH_FETCH(tdbb, &window, LCK_read, pag_log);
|
| 1085 |
|
| 1086 |
UCHAR* entry_p;
|
| 1087 |
const UCHAR* dummy;
|
| 1088 |
if (!find_type(page_num, &window, &page, LCK_read, type, &entry_p, &dummy)) {
|
| 1089 |
CCH_RELEASE(tdbb, &window);
|
| 1090 |
return false;
|
| 1091 |
}
|
| 1092 |
|
| 1093 |
USHORT l = entry_p[1];
|
| 1094 |
*len = l;
|
| 1095 |
entry_p += 2;
|
| 1096 |
|
| 1097 |
UCHAR* q = entry;
|
| 1098 |
if (l) {
|
| 1099 |
do {
|
| 1100 |
*q++ = *entry_p++;
|
| 1101 |
} while (--l);
|
| 1102 |
}
|
| 1103 |
|
| 1104 |
CCH_RELEASE(tdbb, &window);
|
| 1105 |
|
| 1106 |
return true;
|
| 1107 |
}
|
| 1108 |
|
| 1109 |
|
| 1110 |
void PAG_header(bool info)
|
| 1111 |
{
|
| 1112 |
/**************************************
|
| 1113 |
*
|
| 1114 |
* P A G _ h e a d e r
|
| 1115 |
*
|
| 1116 |
**************************************
|
| 1117 |
*
|
| 1118 |
* Functional description
|
| 1119 |
* Checkout database header page.
|
| 1120 |
* Done through the page cache.
|
| 1121 |
*
|
| 1122 |
**************************************/
|
| 1123 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1124 |
Database* dbb = tdbb->tdbb_database;
|
| 1125 |
|
| 1126 |
Attachment* attachment = tdbb->tdbb_attachment;
|
| 1127 |
fb_assert(attachment);
|
| 1128 |
|
| 1129 |
WIN window(HEADER_PAGE_NUMBER);
|
| 1130 |
header_page* header =
|
| 1131 |
(header_page*) CCH_FETCH(tdbb, &window, LCK_read, pag_header);
|
| 1132 |
|
| 1133 |
try {
|
| 1134 |
|
| 1135 |
if (header->hdr_next_transaction) {
|
| 1136 |
if (header->hdr_oldest_active > header->hdr_next_transaction)
|
| 1137 |
BUGCHECK(266); /*next transaction older than oldest active */
|
| 1138 |
|
| 1139 |
if (header->hdr_oldest_transaction > header->hdr_next_transaction)
|
| 1140 |
BUGCHECK(267); /* next transaction older than oldest transaction */
|
| 1141 |
}
|
| 1142 |
|
| 1143 |
if (header->hdr_flags & hdr_SQL_dialect_3)
|
| 1144 |
dbb->dbb_flags |= DBB_DB_SQL_dialect_3;
|
| 1145 |
|
| 1146 |
jrd_rel* relation = MET_relation(tdbb, 0);
|
| 1147 |
RelationPages* relPages = relation->getBasePages();
|
| 1148 |
if (!relPages->rel_pages) {
|
| 1149 |
// 21-Dec-2003 Nickolay Samofatov
|
| 1150 |
// No need to re-set first page for RDB$PAGES relation since
|
| 1151 |
// current code cannot change its location after database creation.
|
| 1152 |
// Currently, this change only affects isc_database_info call,
|
| 1153 |
// the only call which may call PAG_header multiple times.
|
| 1154 |
// In fact, this isc_database_info behavior seems dangerous to me,
|
| 1155 |
// but let somebody else fix that problem, I just fix the memory leak.
|
| 1156 |
vcl* vector = vcl::newVector(*dbb->dbb_permanent, 1);
|
| 1157 |
relPages->rel_pages = vector;
|
| 1158 |
(*vector)[0] = header->hdr_PAGES;
|
| 1159 |
}
|
| 1160 |
|
| 1161 |
dbb->dbb_next_transaction = header->hdr_next_transaction;
|
| 1162 |
|
| 1163 |
if (!info || dbb->dbb_oldest_transaction < header->hdr_oldest_transaction) {
|
| 1164 |
dbb->dbb_oldest_transaction = header->hdr_oldest_transaction;
|
| 1165 |
}
|
| 1166 |
if (!info || dbb->dbb_oldest_active < header->hdr_oldest_active) {
|
| 1167 |
dbb->dbb_oldest_active = header->hdr_oldest_active;
|
| 1168 |
}
|
| 1169 |
if (!info || dbb->dbb_oldest_snapshot < header->hdr_oldest_snapshot) {
|
| 1170 |
dbb->dbb_oldest_snapshot = header->hdr_oldest_snapshot;
|
| 1171 |
}
|
| 1172 |
|
| 1173 |
dbb->dbb_attachment_id = header->hdr_attachment_id;
|
| 1174 |
dbb->dbb_creation_date = *(ISC_TIMESTAMP*) header->hdr_creation_date;
|
| 1175 |
|
| 1176 |
if (header->hdr_flags & hdr_read_only) {
|
| 1177 |
/* If Header Page flag says the database is ReadOnly, gladly accept it. */
|
| 1178 |
dbb->dbb_flags &= ~DBB_being_opened_read_only;
|
| 1179 |
dbb->dbb_flags |= DBB_read_only;
|
| 1180 |
}
|
| 1181 |
|
| 1182 |
/* If hdr_read_only is not set... */
|
| 1183 |
if (!(header->hdr_flags & hdr_read_only)
|
| 1184 |
&& (dbb->dbb_flags & DBB_being_opened_read_only))
|
| 1185 |
{
|
| 1186 |
/* Looks like the Header page says, it is NOT ReadOnly!! But the database
|
| 1187 |
* file system permission gives only ReadOnly access. Punt out with
|
| 1188 |
* isc_no_priv error (no privileges)
|
| 1189 |
*/
|
| 1190 |
ERR_post(isc_no_priv,
|
| 1191 |
isc_arg_string, "read-write",
|
| 1192 |
isc_arg_string, "database",
|
| 1193 |
isc_arg_string, ERR_string(attachment->att_filename),
|
| 1194 |
0);
|
| 1195 |
}
|
| 1196 |
|
| 1197 |
if (header->hdr_flags & hdr_force_write) {
|
| 1198 |
dbb->dbb_flags |= DBB_force_write;
|
| 1199 |
|
| 1200 |
PageSpace* pageSpace = dbb->dbb_page_manager.findPageSpace(DB_PAGE_SPACE);
|
| 1201 |
if (!(header->hdr_flags & hdr_read_only))
|
| 1202 |
PIO_force_write(pageSpace->file, true);
|
| 1203 |
}
|
| 1204 |
|
| 1205 |
if (header->hdr_flags & hdr_no_reserve)
|
| 1206 |
dbb->dbb_flags |= DBB_no_reserve;
|
| 1207 |
|
| 1208 |
const USHORT sd_flags = header->hdr_flags & hdr_shutdown_mask;
|
| 1209 |
if (sd_flags) {
|
| 1210 |
dbb->dbb_ast_flags |= DBB_shutdown;
|
| 1211 |
if (sd_flags == hdr_shutdown_full)
|
| 1212 |
dbb->dbb_ast_flags |= DBB_shutdown_full;
|
| 1213 |
else if (sd_flags == hdr_shutdown_single)
|
| 1214 |
dbb->dbb_ast_flags |= DBB_shutdown_single;
|
| 1215 |
}
|
| 1216 |
|
| 1217 |
} // try
|
| 1218 |
catch (const Firebird::Exception&) {
|
| 1219 |
CCH_RELEASE(tdbb, &window);
|
| 1220 |
throw;
|
| 1221 |
}
|
| 1222 |
|
| 1223 |
CCH_RELEASE(tdbb, &window);
|
| 1224 |
}
|
| 1225 |
|
| 1226 |
|
| 1227 |
void PAG_header_init()
|
| 1228 |
{
|
| 1229 |
/**************************************
|
| 1230 |
*
|
| 1231 |
* P A G _ h e a d e r _ i n i t
|
| 1232 |
*
|
| 1233 |
**************************************
|
| 1234 |
*
|
| 1235 |
* Functional description
|
| 1236 |
* Checkout the core part of the database header page.
|
| 1237 |
* It includes the fields required to setup the I/O layer:
|
| 1238 |
* ODS version, page size, page buffers.
|
| 1239 |
* Done using a physical page read.
|
| 1240 |
*
|
| 1241 |
**************************************/
|
| 1242 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1243 |
Database* dbb = tdbb->tdbb_database;
|
| 1244 |
|
| 1245 |
Attachment* attachment = tdbb->tdbb_attachment;
|
| 1246 |
fb_assert(attachment);
|
| 1247 |
|
| 1248 |
// Allocate a spare buffer which is large enough,
|
| 1249 |
// and set up to release it in case of error; note
|
| 1250 |
// that dbb_page_size has not been set yet, so we
|
| 1251 |
// can't depend on this.
|
| 1252 |
//
|
| 1253 |
// Make sure that buffer is aligned on a page boundary
|
| 1254 |
// and unit of transfer is a multiple of physical disk
|
| 1255 |
// sector for raw disk access.
|
| 1256 |
|
| 1257 |
SCHAR temp_buffer[2 * MIN_PAGE_SIZE];
|
| 1258 |
SCHAR* temp_page = (SCHAR *) FB_ALIGN((IPTR) temp_buffer, MIN_PAGE_SIZE);
|
| 1259 |
|
| 1260 |
header_page* header = (header_page*) temp_page;
|
| 1261 |
PIO_header(dbb, temp_page, MIN_PAGE_SIZE);
|
| 1262 |
|
| 1263 |
if (header->hdr_header.pag_type != pag_header || header->hdr_sequence) {
|
| 1264 |
ERR_post(isc_bad_db_format,
|
| 1265 |
isc_arg_string, ERR_string(attachment->att_filename),
|
| 1266 |
0);
|
| 1267 |
}
|
| 1268 |
|
| 1269 |
const USHORT ods_version = header->hdr_ods_version & ~ODS_FIREBIRD_FLAG;
|
| 1270 |
|
| 1271 |
if (!Ods::isSupported(header->hdr_ods_version, header->hdr_ods_minor))
|
| 1272 |
{
|
| 1273 |
ERR_post(isc_wrong_ods,
|
| 1274 |
isc_arg_string, ERR_string(attachment->att_filename),
|
| 1275 |
isc_arg_number, (SLONG) ods_version,
|
| 1276 |
isc_arg_number, (SLONG) header->hdr_ods_minor,
|
| 1277 |
isc_arg_number, (SLONG) ODS_VERSION,
|
| 1278 |
isc_arg_number, (SLONG) ODS_CURRENT,
|
| 1279 |
0);
|
| 1280 |
}
|
| 1281 |
|
| 1282 |
// Note that if this check is turned on, it should be recoded in order that
|
| 1283 |
// the Intel platforms can share databases. At present (Feb 95) it is possible
|
| 1284 |
// to share databases between Windows and NT, but not with NetWare. Sharing
|
| 1285 |
// databases with OS/2 is unknown and needs to be investigated. The CLASS was
|
| 1286 |
// initially 8 for all Intel platforms, but was changed after 4.0 was released
|
| 1287 |
// in order to allow differentiation between databases created on various
|
| 1288 |
// platforms. This should allow us in future to identify where databases were
|
| 1289 |
// created. Even when we get to the stage where databases created on PC platforms
|
| 1290 |
// are sharable between all platforms, it would be useful to identify where they
|
| 1291 |
// were created for debugging purposes. - Deej 2/6/95
|
| 1292 |
//
|
| 1293 |
// Re-enable and recode the check to avoid BUGCHECK messages when database
|
| 1294 |
// is accessed with engine built for another architecture. - Nickolay 9-Feb-2005
|
| 1295 |
|
| 1296 |
if (header->hdr_implementation != CLASS &&
|
| 1297 |
ods_version < ODS_VERSION11 ?
|
| 1298 |
(header->hdr_implementation < 0 || header->hdr_implementation > CLASS_MAX10 ||
|
| 1299 |
archMatrix10[header->hdr_implementation] == archUnknown ||
|
| 1300 |
archMatrix10[header->hdr_implementation] != archMatrix10[CLASS])
|
| 1301 |
:
|
| 1302 |
(header->hdr_implementation < 0 || header->hdr_implementation > CLASS_MAX ||
|
| 1303 |
archMatrix[header->hdr_implementation] == archUnknown ||
|
| 1304 |
archMatrix[header->hdr_implementation] != archMatrix[CLASS])
|
| 1305 |
)
|
| 1306 |
{
|
| 1307 |
ERR_post(isc_bad_db_format,
|
| 1308 |
isc_arg_string, ERR_string(attachment->att_filename),
|
| 1309 |
0);
|
| 1310 |
}
|
| 1311 |
|
| 1312 |
if (header->hdr_page_size < MIN_PAGE_SIZE ||
|
| 1313 |
header->hdr_page_size > MAX_PAGE_SIZE)
|
| 1314 |
{
|
| 1315 |
ERR_post(isc_bad_db_format,
|
| 1316 |
isc_arg_string, ERR_string(attachment->att_filename),
|
| 1317 |
0);
|
| 1318 |
}
|
| 1319 |
|
| 1320 |
dbb->dbb_ods_version = ods_version;
|
| 1321 |
dbb->dbb_minor_version = header->hdr_ods_minor;
|
| 1322 |
dbb->dbb_minor_original = header->hdr_ods_minor_original;
|
| 1323 |
|
| 1324 |
dbb->dbb_page_size = header->hdr_page_size;
|
| 1325 |
dbb->dbb_page_buffers = header->hdr_page_buffers;
|
| 1326 |
}
|
| 1327 |
|
| 1328 |
|
| 1329 |
void PAG_init()
|
| 1330 |
{
|
| 1331 |
/**************************************
|
| 1332 |
*
|
| 1333 |
* P A G _ i n i t
|
| 1334 |
*
|
| 1335 |
**************************************
|
| 1336 |
*
|
| 1337 |
* Functional description
|
| 1338 |
* Initialize stuff for page handling.
|
| 1339 |
*
|
| 1340 |
**************************************/
|
| 1341 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1342 |
Database* dbb = tdbb->tdbb_database;
|
| 1343 |
CHECK_DBB(dbb);
|
| 1344 |
|
| 1345 |
PageManager& pageMgr = dbb->dbb_page_manager;
|
| 1346 |
PageSpace* pageSpace = pageMgr.findPageSpace(DB_PAGE_SPACE);
|
| 1347 |
fb_assert(pageSpace);
|
| 1348 |
|
| 1349 |
pageMgr.bytesBitPIP = dbb->dbb_page_size - OFFSETA(page_inv_page*, pip_bits);
|
| 1350 |
pageMgr.pagesPerPIP = pageMgr.bytesBitPIP * 8;
|
| 1351 |
pageMgr.transPerTIP =
|
| 1352 |
(dbb->dbb_page_size - OFFSETA(tx_inv_page*, tip_transactions)) * 4;
|
| 1353 |
pageSpace->ppFirst = 1;
|
| 1354 |
/* dbb_ods_version can be 0 when a new database is being created */
|
| 1355 |
if ((dbb->dbb_ods_version == 0)
|
| 1356 |
|| (dbb->dbb_ods_version >= ODS_VERSION10))
|
| 1357 |
{
|
| 1358 |
pageMgr.gensPerPage =
|
| 1359 |
(dbb->dbb_page_size -
|
| 1360 |
OFFSETA(generator_page*, gpg_values)) / sizeof(((generator_page*) NULL)->gpg_values);
|
| 1361 |
}
|
| 1362 |
else {
|
| 1363 |
pageMgr.gensPerPage =
|
| 1364 |
(dbb->dbb_page_size -
|
| 1365 |
OFFSETA(pointer_page*, ppg_page)) / sizeof(((pointer_page*) NULL)->ppg_page);
|
| 1366 |
}
|
| 1367 |
|
| 1368 |
|
| 1369 |
/* Compute the number of data pages per pointer page. Each data page
|
| 1370 |
requires a 32 bit pointer and a 2 bit control field. */
|
| 1371 |
|
| 1372 |
dbb->dbb_dp_per_pp = (dbb->dbb_page_size - OFFSETA(pointer_page*, ppg_page)) * 8 /
|
| 1373 |
(BITS_PER_LONG + 2);
|
| 1374 |
|
| 1375 |
/* Compute the number of records that can fit on a page using the
|
| 1376 |
size of the record index (dpb_repeat) and a record header. This
|
| 1377 |
gives an artificially high number, reducing the density of db_keys. */
|
| 1378 |
|
| 1379 |
dbb->dbb_max_records = (dbb->dbb_page_size - sizeof(data_page)) /
|
| 1380 |
(sizeof(data_page::dpg_repeat) + OFFSETA(rhd*, rhd_data));
|
| 1381 |
|
| 1382 |
// Artifically reduce density of records to test high bits of record number
|
| 1383 |
// dbb->dbb_max_records = 32000;
|
| 1384 |
|
| 1385 |
/* Optimize record numbers for new 64-bit sparse bitmap implementation
|
| 1386 |
We need to measure if it is beneficial from performance point of view.
|
| 1387 |
Price is slightly reduced density of record numbers, but for
|
| 1388 |
ODS11 it doesn't matter because record numbers are 40-bit.
|
| 1389 |
Benefit is ~1.5 times smaller sparse bitmaps on average and
|
| 1390 |
faster bitmap iteration. */
|
| 1391 |
// if (dbb->dbb_ods_version >= ODS_VERSION11)
|
| 1392 |
// dbb->dbb_max_records = FB_ALIGN(dbb->dbb_max_records, 64);
|
| 1393 |
|
| 1394 |
/* Compute the number of index roots that will fit on an index root page,
|
| 1395 |
assuming that each index has only one key */
|
| 1396 |
|
| 1397 |
dbb->dbb_max_idx = (dbb->dbb_page_size - OFFSETA(index_root_page*, irt_rpt)) /
|
| 1398 |
(sizeof(index_root_page::irt_repeat) +
|
| 1399 |
(1 * (dbb->dbb_ods_version >= ODS_VERSION11) ?
|
| 1400 |
sizeof(irtd) : sizeof(irtd_ods10)));
|
| 1401 |
|
| 1402 |
/* Compute prefetch constants from database page size and maximum prefetch
|
| 1403 |
transfer size. Double pages per prefetch request so that cache reader
|
| 1404 |
can overlap prefetch I/O with database computation over previously
|
| 1405 |
prefetched pages. */
|
| 1406 |
#ifdef SUPERSERVER_V2
|
| 1407 |
dbb->dbb_prefetch_sequence = PREFETCH_MAX_TRANSFER / dbb->dbb_page_size;
|
| 1408 |
dbb->dbb_prefetch_pages = dbb->dbb_prefetch_sequence * 2;
|
| 1409 |
#endif
|
| 1410 |
}
|
| 1411 |
|
| 1412 |
|
| 1413 |
void PAG_init2(USHORT shadow_number)
|
| 1414 |
{
|
| 1415 |
/**************************************
|
| 1416 |
*
|
| 1417 |
* P A G _ i n i t 2
|
| 1418 |
*
|
| 1419 |
**************************************
|
| 1420 |
*
|
| 1421 |
* Functional description
|
| 1422 |
* Perform second phase of page initialization -- the eternal
|
| 1423 |
* search for additional files.
|
| 1424 |
*
|
| 1425 |
**************************************/
|
| 1426 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1427 |
Database* dbb = tdbb->tdbb_database;
|
| 1428 |
ISC_STATUS* status = tdbb->tdbb_status_vector;
|
| 1429 |
|
| 1430 |
/* allocate a spare buffer which is large enough,
|
| 1431 |
and set up to release it in case of error. Align
|
| 1432 |
the temporary page buffer for raw disk access. */
|
| 1433 |
|
| 1434 |
SCHAR* const temp_buffer = FB_NEW(*getDefaultMemoryPool()) SCHAR[dbb->dbb_page_size + MIN_PAGE_SIZE];
|
| 1435 |
SCHAR* temp_page =
|
| 1436 |
(SCHAR *) (((U_IPTR) temp_buffer + MIN_PAGE_SIZE - 1) &
|
| 1437 |
~((U_IPTR) MIN_PAGE_SIZE - 1));
|
| 1438 |
|
| 1439 |
try {
|
| 1440 |
|
| 1441 |
PageSpace* pageSpace = dbb->dbb_page_manager.findPageSpace(DB_PAGE_SPACE);
|
| 1442 |
jrd_file* file = pageSpace->file;
|
| 1443 |
if (shadow_number) {
|
| 1444 |
Shadow* shadow = dbb->dbb_shadow;
|
| 1445 |
for (; shadow; shadow = shadow->sdw_next) {
|
| 1446 |
if (shadow->sdw_number == shadow_number) {
|
| 1447 |
file = shadow->sdw_file;
|
| 1448 |
break;
|
| 1449 |
}
|
| 1450 |
}
|
| 1451 |
if (!shadow)
|
| 1452 |
BUGCHECK(161); /* msg 161 shadow block not found */
|
| 1453 |
}
|
| 1454 |
|
| 1455 |
USHORT sequence = 1;
|
| 1456 |
WIN window(DB_PAGE_SPACE, -1);
|
| 1457 |
|
| 1458 |
TEXT buf[MAXPATHLEN + 1];
|
| 1459 |
|
| 1460 |
/* Loop thru files and header pages until everything is open */
|
| 1461 |
|
| 1462 |
for (;;)
|
| 1463 |
{
|
| 1464 |
TEXT* file_name = NULL;
|
| 1465 |
window.win_page = file->fil_min_page;
|
| 1466 |
USHORT file_length = 0;
|
| 1467 |
ULONG last_page = 0;
|
| 1468 |
BufferDesc temp_bdb;
|
| 1469 |
SLONG next_page = 0;
|
| 1470 |
do {
|
| 1471 |
/* note that we do not have to get a read lock on
|
| 1472 |
the header page (except for header page 0) because
|
| 1473 |
the only time it will be modified is when adding a file,
|
| 1474 |
which must be done with an exclusive lock on the database --
|
| 1475 |
if this changes, this policy will have to be reevaluated;
|
| 1476 |
at any rate there is a problem with getting a read lock
|
| 1477 |
because the corresponding page in the main database file
|
| 1478 |
may not exist */
|
| 1479 |
|
| 1480 |
if (!file->fil_min_page)
|
| 1481 |
CCH_FETCH(tdbb, &window, LCK_read, pag_header);
|
| 1482 |
|
| 1483 |
header_page* header = (header_page*) temp_page;
|
| 1484 |
temp_bdb.bdb_buffer = (PAG) header;
|
| 1485 |
temp_bdb.bdb_page = window.win_page;
|
| 1486 |
temp_bdb.bdb_dbb = dbb;
|
| 1487 |
|
| 1488 |
/* Read the required page into the local buffer */
|
| 1489 |
PIO_read(file, &temp_bdb, (PAG) header, status);
|
| 1490 |
|
| 1491 |
if ((shadow_number) && (!file->fil_min_page))
|
| 1492 |
CCH_RELEASE(tdbb, &window);
|
| 1493 |
|
| 1494 |
for (const TEXT* p = reinterpret_cast<TEXT*>(header->hdr_data);
|
| 1495 |
*p != HDR_end;
|
| 1496 |
p += 2 + p[1])
|
| 1497 |
{
|
| 1498 |
switch (*p) {
|
| 1499 |
case HDR_file:
|
| 1500 |
file_length = p[1];
|
| 1501 |
file_name = buf;
|
| 1502 |
MOVE_FAST(p + 2, buf, file_length);
|
| 1503 |
break;
|
| 1504 |
|
| 1505 |
case HDR_last_page:
|
| 1506 |
MOVE_FAST(p + 2, &last_page, sizeof(last_page));
|
| 1507 |
break;
|
| 1508 |
|
| 1509 |
case HDR_sweep_interval:
|
| 1510 |
// CVC: Let's copy it always.
|
| 1511 |
//if (!(dbb->dbb_flags & DBB_read_only))
|
| 1512 |
MOVE_FAST(p + 2, &dbb->dbb_sweep_interval,
|
| 1513 |
sizeof(SLONG));
|
| 1514 |
break;
|
| 1515 |
}
|
| 1516 |
}
|
| 1517 |
|
| 1518 |
next_page = header->hdr_next_page;
|
| 1519 |
|
| 1520 |
if ((!shadow_number) && (!file->fil_min_page))
|
| 1521 |
CCH_RELEASE(tdbb, &window);
|
| 1522 |
|
| 1523 |
window.win_page = next_page;
|
| 1524 |
|
| 1525 |
/*
|
| 1526 |
* Make sure the header page and all the overflow header
|
| 1527 |
* pages are traversed. For V4.0, only the header page for
|
| 1528 |
* the primary database page will have overflow pages.
|
| 1529 |
*/
|
| 1530 |
|
| 1531 |
} while (next_page);
|
| 1532 |
|
| 1533 |
if (file->fil_min_page)
|
| 1534 |
file->fil_fudge = 1;
|
| 1535 |
if (!file_name)
|
| 1536 |
break;
|
| 1537 |
|
| 1538 |
// Verify database file path against DatabaseAccess entry of firebird.conf
|
| 1539 |
file_name[file_length] = 0;
|
| 1540 |
if (!ISC_verify_database_access(file_name)) {
|
| 1541 |
ERR_post(isc_conf_access_denied,
|
| 1542 |
isc_arg_string, "additional database file",
|
| 1543 |
isc_arg_string, ERR_cstring(file_name),
|
| 1544 |
isc_arg_end);
|
| 1545 |
}
|
| 1546 |
|
| 1547 |
file->fil_next = PIO_open(dbb, file_name, false, file_name, false);
|
| 1548 |
file->fil_max_page = last_page;
|
| 1549 |
file = file->fil_next;
|
| 1550 |
if (dbb->dbb_flags & DBB_force_write)
|
| 1551 |
PIO_force_write(file, true);
|
| 1552 |
file->fil_min_page = last_page + 1;
|
| 1553 |
file->fil_sequence = sequence++;
|
| 1554 |
}
|
| 1555 |
|
| 1556 |
if (temp_buffer)
|
| 1557 |
delete[] temp_buffer;
|
| 1558 |
} // try
|
| 1559 |
catch (const Firebird::Exception&) {
|
| 1560 |
if (temp_buffer)
|
| 1561 |
delete[] temp_buffer;
|
| 1562 |
throw;
|
| 1563 |
}
|
| 1564 |
}
|
| 1565 |
|
| 1566 |
|
| 1567 |
SLONG PAG_last_page()
|
| 1568 |
{
|
| 1569 |
/**************************************
|
| 1570 |
*
|
| 1571 |
* P A G _ l a s t _ p a g e
|
| 1572 |
*
|
| 1573 |
**************************************
|
| 1574 |
*
|
| 1575 |
* Functional description
|
| 1576 |
* Compute the highest page allocated. This is called by the
|
| 1577 |
* shadow stuff to dump a database.
|
| 1578 |
*
|
| 1579 |
**************************************/
|
| 1580 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1581 |
Database* dbb = tdbb->tdbb_database;
|
| 1582 |
CHECK_DBB(dbb);
|
| 1583 |
|
| 1584 |
PageManager& pageMgr = dbb->dbb_page_manager;
|
| 1585 |
PageSpace* pageSpace = pageMgr.findPageSpace(DB_PAGE_SPACE);
|
| 1586 |
fb_assert(pageSpace);
|
| 1587 |
|
| 1588 |
const ULONG pages_per_pip = pageMgr.pagesPerPIP;
|
| 1589 |
WIN window(DB_PAGE_SPACE, -1);
|
| 1590 |
|
| 1591 |
/* Find the last page allocated */
|
| 1592 |
|
| 1593 |
ULONG relative_bit = 0;
|
| 1594 |
USHORT sequence;
|
| 1595 |
for (sequence = 0;; ++sequence) {
|
| 1596 |
window.win_page =
|
| 1597 |
(!sequence) ? pageSpace->ppFirst : sequence *
|
| 1598 |
pages_per_pip - 1;
|
| 1599 |
page_inv_page* page = (page_inv_page*) CCH_FETCH(tdbb, &window, LCK_read, pag_pages);
|
| 1600 |
UCHAR* bits;
|
| 1601 |
for (bits = page->pip_bits + (pages_per_pip >> 3) - 1;
|
| 1602 |
*bits == (UCHAR) - 1; --bits); // null loop body???
|
| 1603 |
SSHORT bit;
|
| 1604 |
for (bit = 7; bit >= 0; --bit) {
|
| 1605 |
if (!(*bits & (1 << bit)))
|
| 1606 |
break;
|
| 1607 |
}
|
| 1608 |
relative_bit = (bits - page->pip_bits) * 8 + bit;
|
| 1609 |
CCH_RELEASE(tdbb, &window);
|
| 1610 |
if (relative_bit != pages_per_pip - 1)
|
| 1611 |
break;
|
| 1612 |
}
|
| 1613 |
|
| 1614 |
return sequence * pages_per_pip + relative_bit;
|
| 1615 |
}
|
| 1616 |
|
| 1617 |
|
| 1618 |
void PAG_release_page(const PageNumber& number, const PageNumber& prior_page)
|
| 1619 |
{
|
| 1620 |
/**************************************
|
| 1621 |
*
|
| 1622 |
* P A G _ r e l e a s e _ p a g e
|
| 1623 |
*
|
| 1624 |
**************************************
|
| 1625 |
*
|
| 1626 |
* Functional description
|
| 1627 |
* Release a page to the free page page.
|
| 1628 |
*
|
| 1629 |
**************************************/
|
| 1630 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1631 |
Database* dbb = tdbb->tdbb_database;
|
| 1632 |
CHECK_DBB(dbb);
|
| 1633 |
|
| 1634 |
#ifdef VIO_DEBUG
|
| 1635 |
if (debug_flag > DEBUG_WRITES_INFO)
|
| 1636 |
printf("\tPAG_release_page: about to release page %"SLONGFORMAT"\n", number.getPageNumber());
|
| 1637 |
#endif
|
| 1638 |
|
| 1639 |
PageManager& pageMgr = dbb->dbb_page_manager;
|
| 1640 |
PageSpace* pageSpace = pageMgr.findPageSpace(number.getPageSpaceID());
|
| 1641 |
fb_assert(pageSpace);
|
| 1642 |
|
| 1643 |
const SLONG sequence = number.getPageNum() / pageMgr.pagesPerPIP;
|
| 1644 |
const SLONG relative_bit = number.getPageNum() % pageMgr.pagesPerPIP;
|
| 1645 |
|
| 1646 |
WIN pip_window(number.getPageSpaceID(), (sequence == 0) ?
|
| 1647 |
pageSpace->ppFirst : sequence * pageMgr.pagesPerPIP - 1);
|
| 1648 |
|
| 1649 |
page_inv_page* pages =
|
| 1650 |
(page_inv_page*) CCH_FETCH(tdbb, &pip_window, LCK_write, pag_pages);
|
| 1651 |
CCH_precedence(tdbb, &pip_window, prior_page);
|
| 1652 |
CCH_MARK(tdbb, &pip_window);
|
| 1653 |
pages->pip_bits[relative_bit >> 3] |= 1 << (relative_bit & 7);
|
| 1654 |
pages->pip_min = MIN(pages->pip_min, relative_bit);
|
| 1655 |
|
| 1656 |
CCH_RELEASE(tdbb, &pip_window);
|
| 1657 |
|
| 1658 |
pageSpace->pipHighWater = MIN(pageSpace->pipHighWater, sequence);
|
| 1659 |
}
|
| 1660 |
|
| 1661 |
|
| 1662 |
void PAG_set_force_write(Database* dbb, SSHORT flag)
|
| 1663 |
{
|
| 1664 |
/**************************************
|
| 1665 |
*
|
| 1666 |
* P A G _ s e t _ f o r c e _ w r i t e
|
| 1667 |
*
|
| 1668 |
**************************************
|
| 1669 |
*
|
| 1670 |
* Functional description
|
| 1671 |
* Turn on/off force write.
|
| 1672 |
* The value 2 for flag means set to default.
|
| 1673 |
*
|
| 1674 |
**************************************/
|
| 1675 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1676 |
|
| 1677 |
err_post_if_database_is_readonly(dbb);
|
| 1678 |
|
| 1679 |
WIN window(HEADER_PAGE_NUMBER);
|
| 1680 |
header_page* header = (header_page*) CCH_FETCH(tdbb, &window, LCK_write, pag_header);
|
| 1681 |
CCH_MARK_MUST_WRITE(tdbb, &window);
|
| 1682 |
|
| 1683 |
if (flag == 2)
|
| 1684 |
/* Set force write to the default for the platform */
|
| 1685 |
#ifdef SYNC_WRITE_DEFAULT
|
| 1686 |
flag = 1;
|
| 1687 |
#else
|
| 1688 |
flag = 0;
|
| 1689 |
#endif
|
| 1690 |
|
| 1691 |
if (flag) {
|
| 1692 |
header->hdr_flags |= hdr_force_write;
|
| 1693 |
dbb->dbb_flags |= DBB_force_write;
|
| 1694 |
}
|
| 1695 |
else {
|
| 1696 |
header->hdr_flags &= ~hdr_force_write;
|
| 1697 |
dbb->dbb_flags &= ~DBB_force_write;
|
| 1698 |
}
|
| 1699 |
|
| 1700 |
CCH_RELEASE(tdbb, &window);
|
| 1701 |
|
| 1702 |
PageSpace* pageSpace =
|
| 1703 |
dbb->dbb_page_manager.findPageSpace(DB_PAGE_SPACE);
|
| 1704 |
for (jrd_file* file = pageSpace->file; file; file = file->fil_next) {
|
| 1705 |
PIO_force_write(file, flag != 0);
|
| 1706 |
}
|
| 1707 |
|
| 1708 |
for (Shadow* shadow = dbb->dbb_shadow; shadow; shadow = shadow->sdw_next) {
|
| 1709 |
for (jrd_file* file = shadow->sdw_file; file; file = file->fil_next)
|
| 1710 |
PIO_force_write(file, flag != 0);
|
| 1711 |
}
|
| 1712 |
}
|
| 1713 |
|
| 1714 |
|
| 1715 |
void PAG_set_no_reserve(Database* dbb, USHORT flag)
|
| 1716 |
{
|
| 1717 |
/**************************************
|
| 1718 |
*
|
| 1719 |
* P A G _ s e t _ n o _ r e s e r v e
|
| 1720 |
*
|
| 1721 |
**************************************
|
| 1722 |
*
|
| 1723 |
* Functional description
|
| 1724 |
* Turn on/off reserving space for versions
|
| 1725 |
*
|
| 1726 |
**************************************/
|
| 1727 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1728 |
|
| 1729 |
err_post_if_database_is_readonly(dbb);
|
| 1730 |
|
| 1731 |
WIN window(HEADER_PAGE_NUMBER);
|
| 1732 |
header_page* header = (header_page*) CCH_FETCH(tdbb, &window, LCK_write, pag_header);
|
| 1733 |
CCH_MARK_MUST_WRITE(tdbb, &window);
|
| 1734 |
|
| 1735 |
if (flag) {
|
| 1736 |
header->hdr_flags |= hdr_no_reserve;
|
| 1737 |
dbb->dbb_flags |= DBB_no_reserve;
|
| 1738 |
}
|
| 1739 |
else {
|
| 1740 |
header->hdr_flags &= ~hdr_no_reserve;
|
| 1741 |
dbb->dbb_flags &= ~DBB_no_reserve;
|
| 1742 |
}
|
| 1743 |
|
| 1744 |
CCH_RELEASE(tdbb, &window);
|
| 1745 |
}
|
| 1746 |
|
| 1747 |
|
| 1748 |
void PAG_set_db_readonly(Database* dbb, bool flag)
|
| 1749 |
{
|
| 1750 |
/*********************************************
|
| 1751 |
*
|
| 1752 |
* P A G _ s e t _ d b _ r e a d o n l y
|
| 1753 |
*
|
| 1754 |
*********************************************
|
| 1755 |
*
|
| 1756 |
* Functional description
|
| 1757 |
* Set database access mode to readonly OR readwrite
|
| 1758 |
*
|
| 1759 |
*********************************************/
|
| 1760 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1761 |
|
| 1762 |
WIN window(HEADER_PAGE_NUMBER);
|
| 1763 |
header_page* header = (header_page*) CCH_FETCH(tdbb, &window, LCK_write, pag_header);
|
| 1764 |
|
| 1765 |
if (!flag) {
|
| 1766 |
/* If the database is transitioning from RO to RW, reset the
|
| 1767 |
* in-memory Database flag which indicates that the database is RO.
|
| 1768 |
* This will allow the CCH subsystem to allow pages to be MARK'ed
|
| 1769 |
* for WRITE operations
|
| 1770 |
*/
|
| 1771 |
header->hdr_flags &= ~hdr_read_only;
|
| 1772 |
dbb->dbb_flags &= ~DBB_read_only;
|
| 1773 |
}
|
| 1774 |
|
| 1775 |
CCH_MARK_MUST_WRITE(tdbb, &window);
|
| 1776 |
|
| 1777 |
if (flag) {
|
| 1778 |
header->hdr_flags |= hdr_read_only;
|
| 1779 |
dbb->dbb_flags |= DBB_read_only;
|
| 1780 |
}
|
| 1781 |
|
| 1782 |
CCH_RELEASE(tdbb, &window);
|
| 1783 |
}
|
| 1784 |
|
| 1785 |
|
| 1786 |
void PAG_set_db_SQL_dialect(Database* dbb, SSHORT flag)
|
| 1787 |
{
|
| 1788 |
/*********************************************
|
| 1789 |
*
|
| 1790 |
* P A G _ s e t _ d b _ S Q L _ d i a l e c t
|
| 1791 |
*
|
| 1792 |
*********************************************
|
| 1793 |
*
|
| 1794 |
* Functional description
|
| 1795 |
* Set database SQL dialect to SQL_DIALECT_V5 or SQL_DIALECT_V6
|
| 1796 |
*
|
| 1797 |
*********************************************/
|
| 1798 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1799 |
|
| 1800 |
const USHORT major_version = dbb->dbb_ods_version;
|
| 1801 |
const USHORT minor_original = dbb->dbb_minor_original;
|
| 1802 |
|
| 1803 |
WIN window(HEADER_PAGE_NUMBER);
|
| 1804 |
header_page* header = (header_page*) CCH_FETCH(tdbb, &window, LCK_write, pag_header);
|
| 1805 |
|
| 1806 |
if ((flag) && (ENCODE_ODS(major_version, minor_original) >= ODS_10_0)) {
|
| 1807 |
switch (flag) {
|
| 1808 |
case SQL_DIALECT_V5:
|
| 1809 |
|
| 1810 |
if (dbb->dbb_flags & DBB_DB_SQL_dialect_3 ||
|
| 1811 |
header->hdr_flags & hdr_SQL_dialect_3)
|
| 1812 |
{
|
| 1813 |
// Check the returned value here!
|
| 1814 |
ERR_post_warning(isc_dialect_reset_warning, 0);
|
| 1815 |
}
|
| 1816 |
|
| 1817 |
dbb->dbb_flags &= ~DBB_DB_SQL_dialect_3; /* set to 0 */
|
| 1818 |
header->hdr_flags &= ~hdr_SQL_dialect_3; /* set to 0 */
|
| 1819 |
break;
|
| 1820 |
|
| 1821 |
case SQL_DIALECT_V6:
|
| 1822 |
dbb->dbb_flags |= DBB_DB_SQL_dialect_3; /* set to dialect 3 */
|
| 1823 |
header->hdr_flags |= hdr_SQL_dialect_3; /* set to dialect 3 */
|
| 1824 |
break;
|
| 1825 |
|
| 1826 |
default:
|
| 1827 |
CCH_RELEASE(tdbb, &window);
|
| 1828 |
ERR_post(isc_inv_dialect_specified, isc_arg_number, flag,
|
| 1829 |
isc_arg_gds, isc_valid_db_dialects, isc_arg_string,
|
| 1830 |
"1 and 3", isc_arg_gds, isc_dialect_not_changed, 0);
|
| 1831 |
break;
|
| 1832 |
}
|
| 1833 |
}
|
| 1834 |
|
| 1835 |
CCH_MARK_MUST_WRITE(tdbb, &window);
|
| 1836 |
|
| 1837 |
CCH_RELEASE(tdbb, &window);
|
| 1838 |
}
|
| 1839 |
|
| 1840 |
|
| 1841 |
void PAG_set_page_buffers(ULONG buffers)
|
| 1842 |
{
|
| 1843 |
/**************************************
|
| 1844 |
*
|
| 1845 |
* P A G _ s e t _ p a g e _ b u f f e r s
|
| 1846 |
*
|
| 1847 |
**************************************
|
| 1848 |
*
|
| 1849 |
* Functional description
|
| 1850 |
* Set database-specific page buffer cache
|
| 1851 |
*
|
| 1852 |
**************************************/
|
| 1853 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1854 |
Database* dbb = tdbb->tdbb_database;
|
| 1855 |
CHECK_DBB(dbb);
|
| 1856 |
|
| 1857 |
err_post_if_database_is_readonly(dbb);
|
| 1858 |
|
| 1859 |
WIN window(HEADER_PAGE_NUMBER);
|
| 1860 |
header_page* header = (header_page*) CCH_FETCH(tdbb, &window, LCK_write, pag_header);
|
| 1861 |
CCH_MARK_MUST_WRITE(tdbb, &window);
|
| 1862 |
header->hdr_page_buffers = buffers;
|
| 1863 |
CCH_RELEASE(tdbb, &window);
|
| 1864 |
}
|
| 1865 |
|
| 1866 |
|
| 1867 |
void PAG_sweep_interval(SLONG interval)
|
| 1868 |
{
|
| 1869 |
/**************************************
|
| 1870 |
*
|
| 1871 |
* P A G _ s w e e p _ i n t e r v a l
|
| 1872 |
*
|
| 1873 |
**************************************
|
| 1874 |
*
|
| 1875 |
* Functional description
|
| 1876 |
* Set sweep interval.
|
| 1877 |
*
|
| 1878 |
**************************************/
|
| 1879 |
|
| 1880 |
PAG_add_clump(HEADER_PAGE, HDR_sweep_interval, sizeof(SLONG),
|
| 1881 |
(UCHAR *) & interval, CLUMP_REPLACE, 1);
|
| 1882 |
}
|
| 1883 |
|
| 1884 |
|
| 1885 |
/*
|
| 1886 |
int PAG_unlicensed()
|
| 1887 |
{
|
| 1888 |
// **************************************
|
| 1889 |
// *
|
| 1890 |
// * P A G _ u n l i c e n s e d
|
| 1891 |
// *
|
| 1892 |
// **************************************
|
| 1893 |
// *
|
| 1894 |
// * Functional description
|
| 1895 |
// * Log unlicensed activity. Return current count of this
|
| 1896 |
// * sort of non-sense.
|
| 1897 |
// *
|
| 1898 |
// **************************************
|
| 1899 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1900 |
|
| 1901 |
WIN window(HEADER_PAGE);
|
| 1902 |
CCH_FETCH(tdbb, &window, LCK_write, pag_header);
|
| 1903 |
CCH_MARK_MUST_WRITE(tdbb, &window);
|
| 1904 |
|
| 1905 |
USHORT len;
|
| 1906 |
SLONG count;
|
| 1907 |
if (PAG_get_clump(HEADER_PAGE, HDR_unlicensed, &len, (UCHAR *) & count)) {
|
| 1908 |
count++;
|
| 1909 |
PAG_add_clump(HEADER_PAGE, HDR_unlicensed, sizeof(count),
|
| 1910 |
(UCHAR *) & count, CLUMP_REPLACE_ONLY, 1);
|
| 1911 |
}
|
| 1912 |
else {
|
| 1913 |
count = 1;
|
| 1914 |
PAG_add_clump(HEADER_PAGE, HDR_unlicensed, sizeof(count),
|
| 1915 |
(UCHAR *) & count, CLUMP_REPLACE, 1);
|
| 1916 |
}
|
| 1917 |
CCH_RELEASE(tdbb, &window);
|
| 1918 |
|
| 1919 |
return count;
|
| 1920 |
}
|
| 1921 |
*/
|
| 1922 |
|
| 1923 |
|
| 1924 |
static void find_clump_space(SLONG page_num,
|
| 1925 |
WIN* window,
|
| 1926 |
PAG* ppage,
|
| 1927 |
USHORT type,
|
| 1928 |
SSHORT len,
|
| 1929 |
const UCHAR* entry,
|
| 1930 |
USHORT must_write)
|
| 1931 |
{
|
| 1932 |
/***********************************************
|
| 1933 |
*
|
| 1934 |
* f i n d _ c l u m p _ s p a c e
|
| 1935 |
*
|
| 1936 |
***********************************************
|
| 1937 |
*
|
| 1938 |
* Functional description
|
| 1939 |
* Find space for the new clump.
|
| 1940 |
* Add the entry at the end of clumplet list.
|
| 1941 |
* Allocate a new page if required.
|
| 1942 |
*
|
| 1943 |
**************************************/
|
| 1944 |
thread_db* tdbb = JRD_get_thread_data();
|
| 1945 |
Database* dbb = tdbb->tdbb_database;
|
| 1946 |
CHECK_DBB(dbb);
|
| 1947 |
|
| 1948 |
const UCHAR* ptr = entry;
|
| 1949 |
pag* page = *ppage;
|
| 1950 |
header_page* header = 0; // used after the loop
|
| 1951 |
log_info_page* logp = 0; // used after the loop
|
| 1952 |
|
| 1953 |
while (true) {
|
| 1954 |
SLONG next_page, free_space;
|
| 1955 |
USHORT* end_addr;
|
| 1956 |
UCHAR* p;
|
| 1957 |
|
| 1958 |
if (page_num == HEADER_PAGE) {
|
| 1959 |
header = (header_page*) page;
|
| 1960 |
next_page = header->hdr_next_page;
|
| 1961 |
free_space = dbb->dbb_page_size - header->hdr_end;
|
| 1962 |
end_addr = &header->hdr_end;
|
| 1963 |
p = (UCHAR *) header + header->hdr_end;
|
| 1964 |
}
|
| 1965 |
else {
|
| 1966 |
logp = (log_info_page*) page;
|
| 1967 |
next_page = logp->log_next_page;
|
| 1968 |
free_space = dbb->dbb_page_size - logp->log_end;
|
| 1969 |
end_addr = &logp->log_end;
|
| 1970 |
p = (UCHAR *) logp + logp->log_end;
|
| 1971 |
}
|
| 1972 |
|
| 1973 |
if (free_space > (2 + len)) {
|
| 1974 |
if (must_write)
|
| 1975 |
CCH_MARK_MUST_WRITE(tdbb, window);
|
| 1976 |
else
|
| 1977 |
CCH_MARK(tdbb, window);
|
| 1978 |
|
| 1979 |
fb_assert(type <= MAX_UCHAR);
|
| 1980 |
fb_assert(len <= MAX_UCHAR);
|
| 1981 |
*p++ = static_cast<UCHAR>(type);
|
| 1982 |
*p++ = static_cast<UCHAR>(len);
|
| 1983 |
|
| 1984 |
if (len) {
|
| 1985 |
do {
|
| 1986 |
*p++ = *ptr++;
|
| 1987 |
} while (--len);
|
| 1988 |
}
|
| 1989 |
|
| 1990 |
*p = HDR_end;
|
| 1991 |
|
| 1992 |
*end_addr = (USHORT) (p - (UCHAR *) page);
|
| 1993 |
return;
|
| 1994 |
}
|
| 1995 |
|
| 1996 |
if (!next_page)
|
| 1997 |
break;
|
| 1998 |
|
| 1999 |
/* Follow chain of header pages */
|
| 2000 |
|
| 2001 |
if (page_num == HEADER_PAGE)
|
| 2002 |
*ppage = page =
|
| 2003 |
CCH_HANDOFF(tdbb, window, next_page, LCK_write, pag_header);
|
| 2004 |
else
|
| 2005 |
*ppage = page =
|
| 2006 |
CCH_HANDOFF(tdbb, window, next_page, LCK_write, pag_log);
|
| 2007 |
}
|
| 2008 |
|
| 2009 |
WIN new_window(DB_PAGE_SPACE, -1);
|
| 2010 |
pag* new_page = (PAG) DPM_allocate(tdbb, &new_window);
|
| 2011 |
|
| 2012 |
if (must_write)
|
| 2013 |
CCH_MARK_MUST_WRITE(tdbb, &new_window);
|
| 2014 |
else
|
| 2015 |
CCH_MARK(tdbb, &new_window);
|
| 2016 |
|
| 2017 |
|
| 2018 |
header_page* new_header = 0;
|
| 2019 |
log_info_page* new_logp = 0;
|
| 2020 |
SLONG next_page;
|
| 2021 |
USHORT* end_addr;
|
| 2022 |
UCHAR* p;
|
| 2023 |
if (page_num == HEADER_PAGE) {
|
| 2024 |
new_header = (header_page*) new_page;
|
| 2025 |
new_header->hdr_header.pag_type = pag_header;
|
| 2026 |
new_header->hdr_end = HDR_SIZE;
|
| 2027 |
new_header->hdr_page_size = dbb->dbb_page_size;
|
| 2028 |
new_header->hdr_data[0] = HDR_end;
|
| 2029 |
next_page = new_window.win_page.getPageNum();
|
| 2030 |
end_addr = &new_header->hdr_end;
|
| 2031 |
p = new_header->hdr_data;
|
| 2032 |
}
|
| 2033 |
else {
|
| 2034 |
new_logp = (log_info_page*) new_page;
|
| 2035 |
new_logp->log_header.pag_type = pag_log;
|
| 2036 |
new_logp->log_data[0] = LOG_end;
|
| 2037 |
new_logp->log_end = LIP_SIZE;
|
| 2038 |
next_page = new_window.win_page.getPageNum();
|
| 2039 |
end_addr = &new_logp->log_end;
|
| 2040 |
p = new_logp->log_data;
|
| 2041 |
}
|
| 2042 |
|
| 2043 |
fb_assert(type <= MAX_UCHAR);
|
| 2044 |
fb_assert(len <= MAX_UCHAR);
|
| 2045 |
*p++ = static_cast<UCHAR>(type);
|
| 2046 |
*p++ = static_cast<UCHAR>(len);
|
| 2047 |
|
| 2048 |
if (len) {
|
| 2049 |
do {
|
| 2050 |
*p++ = *ptr++;
|
| 2051 |
} while (--len);
|
| 2052 |
}
|
| 2053 |
|
| 2054 |
*p = HDR_end;
|
| 2055 |
*end_addr = (USHORT) (p - (UCHAR *) new_page);
|
| 2056 |
|
| 2057 |
CCH_RELEASE(tdbb, &new_window);
|
| 2058 |
|
| 2059 |
CCH_precedence(tdbb, window, next_page);
|
| 2060 |
|
| 2061 |
CCH_MARK(tdbb, window);
|
| 2062 |
|
| 2063 |
if (page_num == HEADER_PAGE)
|
| 2064 |
header->hdr_next_page = next_page;
|
| 2065 |
else
|
| 2066 |
logp->log_next_page = next_page;
|
| 2067 |
}
|
| 2068 |
|
| 2069 |
|
| 2070 |
static bool find_type(SLONG page_num,
|
| 2071 |
WIN* window,
|
| 2072 |
PAG* ppage,
|
| 2073 |
USHORT lock,
|
| 2074 |
USHORT type,
|
| 2075 |
UCHAR** entry_p,
|
| 2076 |
const UCHAR** clump_end)
|
| 2077 |
{
|
| 2078 |
/***********************************************
|
| 2079 |
*
|
| 2080 |
* f i n d _ t y p e
|
| 2081 |
*
|
| 2082 |
***********************************************
|
| 2083 |
*
|
| 2084 |
* Functional description
|
| 2085 |
* Find the requested type in a page.
|
| 2086 |
* RETURNS
|
| 2087 |
* pointer to type, pointer to end of page, header.
|
| 2088 |
* true - Found it
|
| 2089 |
* false - Not present
|
| 2090 |
*
|
| 2091 |
**************************************/
|
| 2092 |
thread_db* tdbb = JRD_get_thread_data();
|
| 2093 |
|
| 2094 |
while (true) {
|
| 2095 |
header_page* header = 0;
|
| 2096 |
log_info_page* logp = 0;
|
| 2097 |
UCHAR* p;
|
| 2098 |
SLONG next_page;
|
| 2099 |
if (page_num == HEADER_PAGE) {
|
| 2100 |
header = (header_page*) (*ppage);
|
| 2101 |
p = header->hdr_data;
|
| 2102 |
next_page = header->hdr_next_page;
|
| 2103 |
}
|
| 2104 |
else {
|
| 2105 |
logp = (log_info_page*) (*ppage);
|
| 2106 |
p = logp->log_data;
|
| 2107 |
next_page = logp->log_next_page;
|
| 2108 |
}
|
| 2109 |
|
| 2110 |
UCHAR* q = 0;
|
| 2111 |
for (; (*p != HDR_end); p += 2 + p[1]) {
|
| 2112 |
if (*p == type)
|
| 2113 |
q = p;
|
| 2114 |
}
|
| 2115 |
|
| 2116 |
if (q) {
|
| 2117 |
*entry_p = q;
|
| 2118 |
*clump_end = p;
|
| 2119 |
return true;
|
| 2120 |
}
|
| 2121 |
|
| 2122 |
/* Follow chain of pages */
|
| 2123 |
|
| 2124 |
if (next_page) {
|
| 2125 |
if (page_num == HEADER_PAGE) {
|
| 2126 |
*ppage =
|
| 2127 |
CCH_HANDOFF(tdbb, window, next_page, lock, pag_header);
|
| 2128 |
}
|
| 2129 |
else {
|
| 2130 |
*ppage = CCH_HANDOFF(tdbb, window, next_page, lock, pag_log);
|
| 2131 |
}
|
| 2132 |
}
|
| 2133 |
else
|
| 2134 |
return false;
|
| 2135 |
}
|
| 2136 |
}
|
| 2137 |
|
| 2138 |
PageSpace::~PageSpace()
|
| 2139 |
{
|
| 2140 |
if (file) {
|
| 2141 |
PIO_close(file);
|
| 2142 |
}
|
| 2143 |
}
|
| 2144 |
|
| 2145 |
PageSpace* PageManager::addPageSpace(const USHORT pageSpaceID)
|
| 2146 |
{
|
| 2147 |
PageSpace* newPageSpace = findPageSpace(pageSpaceID);
|
| 2148 |
if (!newPageSpace)
|
| 2149 |
{
|
| 2150 |
newPageSpace = FB_NEW(pool) PageSpace(pageSpaceID);
|
| 2151 |
pageSpaces.add(newPageSpace);
|
| 2152 |
}
|
| 2153 |
|
| 2154 |
return newPageSpace;
|
| 2155 |
}
|
| 2156 |
|
| 2157 |
PageSpace* PageManager::findPageSpace(const USHORT pageSpace)
|
| 2158 |
{
|
| 2159 |
size_t pos;
|
| 2160 |
if (pageSpaces.find(pageSpace, pos)) {
|
| 2161 |
return pageSpaces[pos];
|
| 2162 |
}
|
| 2163 |
|
| 2164 |
return 0;
|
| 2165 |
}
|
| 2166 |
|
| 2167 |
void PageManager::delPageSpace(const USHORT pageSpace)
|
| 2168 |
{
|
| 2169 |
size_t pos;
|
| 2170 |
if (pageSpaces.find(pageSpace, pos))
|
| 2171 |
{
|
| 2172 |
PageSpace* pageSpaceToDelete = pageSpaces[pos];
|
| 2173 |
pageSpaces.remove(pos);
|
| 2174 |
delete pageSpaceToDelete;
|
| 2175 |
}
|
| 2176 |
}
|
| 2177 |
|
| 2178 |
void PageManager::closeAll()
|
| 2179 |
{
|
| 2180 |
for (size_t i = 0; i < pageSpaces.getCount(); i++)
|
| 2181 |
if (pageSpaces[i]->file) {
|
| 2182 |
PIO_close(pageSpaces[i]->file);
|
| 2183 |
}
|
| 2184 |
}
|
| 2185 |
|
| 2186 |
USHORT PageManager::getTempPageSpaceID(thread_db* tdbb)
|
| 2187 |
{
|
| 2188 |
#ifdef SUPERSERVER
|
| 2189 |
return TEMP_PAGE_SPACE;
|
| 2190 |
#else
|
| 2191 |
SET_TDBB(tdbb);
|
| 2192 |
Database* dbb = tdbb->tdbb_database;
|
| 2193 |
Attachment* att = tdbb->tdbb_attachment;
|
| 2194 |
if (!att->att_temp_pg_lock)
|
| 2195 |
{
|
| 2196 |
Lock* lock = FB_NEW_RPT(*dbb->dbb_permanent, sizeof(USHORT)) Lock();
|
| 2197 |
lock->lck_type = LCK_page_space;
|
| 2198 |
lock->lck_owner_handle = LCK_get_owner_handle(tdbb, lock->lck_type);
|
| 2199 |
lock->lck_parent = dbb->dbb_lock;
|
| 2200 |
lock->lck_length = sizeof(USHORT);
|
| 2201 |
lock->lck_dbb = dbb;
|
| 2202 |
|
| 2203 |
PAG_attachment_id(tdbb);
|
| 2204 |
|
| 2205 |
while (true)
|
| 2206 |
{
|
| 2207 |
const double tmp = rand() * (MAX_USHORT - TEMP_PAGE_SPACE - 1.0) / (RAND_MAX + 1.0);
|
| 2208 |
lock->lck_key.lck_long = tmp + TEMP_PAGE_SPACE + 1;
|
| 2209 |
if (LCK_lock(tdbb, lock, LCK_write, LCK_NO_WAIT))
|
| 2210 |
break;
|
| 2211 |
}
|
| 2212 |
|
| 2213 |
att->att_temp_pg_lock = lock;
|
| 2214 |
}
|
| 2215 |
|
| 2216 |
return (USHORT) att->att_temp_pg_lock->lck_key.lck_long;
|
| 2217 |
#endif
|
| 2218 |
}
|
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