ffe3cb6975
git-svn-id: https://svn.code.sf.net/p/flaim/code/trunk@482 0109f412-320b-0410-ab79-c3e0c5ffbbe6
471 lines
11 KiB
C++
471 lines
11 KiB
C++
//------------------------------------------------------------------------------
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// Desc: Create a database.
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//
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// Tabs: 3
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//
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// Copyright (c) 1990-2006 Novell, Inc. All Rights Reserved.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of version 2 of the GNU General Public
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// License as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, contact Novell, Inc.
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//
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// To contact Novell about this file by physical or electronic mail,
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// you may find current contact information at www.novell.com
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//
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// $Id$
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//------------------------------------------------------------------------------
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#include "flaimsys.h"
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/*API~***********************************************************************
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Desc: Creates a new FLAIM database.
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*END************************************************************************/
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RCODE F_DbSystem::dbCreate(
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const char * pszFilePath,
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const char * pszDataDir,
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const char * pszRflDir,
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SFLM_CREATE_OPTS * pCreateOpts,
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FLMBOOL bTempDb,
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F_Db ** ppDb)
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{
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RCODE rc = NE_SFLM_OK;
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F_Db * pDb = NULL;
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F_Database * pDatabase = NULL;
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FLMBOOL bDatabaseCreated = FALSE;
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FLMBOOL bNewDatabase = FALSE;
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FLMBOOL bMutexLocked = FALSE;
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FLMUINT uiRflToken = 0;
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// Make sure the path looks valid
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if (!pszFilePath || !pszFilePath [0])
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{
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rc = RC_SET( NE_FLM_IO_INVALID_FILENAME);
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goto Exit;
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}
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// Allocate and initialize an F_Db structure.
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if (RC_BAD( rc = allocDb( &pDb, FALSE)))
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{
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goto Exit;
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}
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f_mutexLock( gv_SFlmSysData.hShareMutex);
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bMutexLocked = TRUE;
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// Free any unused structures that have been unused for the maximum
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// amount of time. May unlock and re-lock the global mutex.
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checkNotUsedObjects();
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for( ;;)
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{
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// See if we already have the file open.
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// May unlock and re-lock the global mutex.
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if (RC_BAD( rc = findDatabase( pszFilePath, pszDataDir, &pDatabase)))
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{
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goto Exit;
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}
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// Didn't find the database
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if (!pDatabase)
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{
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break;
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}
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// See if file is open or being opened.
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if (pDatabase->m_uiOpenIFDbCount || (pDatabase->m_uiFlags & DBF_BEING_OPENED))
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{
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rc = RC_SET( NE_FLM_IO_ACCESS_DENIED);
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goto Exit;
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}
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// Free the F_Database object. May temporarily unlock the global mutex.
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// For this reason, we must call findDatabase again (see above) after
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// freeing the object.
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pDatabase->freeDatabase();
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pDatabase = NULL;
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}
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// Allocate a new F_Database object
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if (RC_BAD( rc = allocDatabase( pszFilePath, pszDataDir, bTempDb, &pDatabase)))
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{
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goto Exit;
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}
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bNewDatabase = TRUE;
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// Link the F_Db object to the F_Database object.
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rc = pDb->linkToDatabase( pDatabase);
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f_mutexUnlock( gv_SFlmSysData.hShareMutex);
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bMutexLocked = FALSE;
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if (RC_BAD( rc))
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{
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goto Exit;
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}
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// If the database has not already been created, do so now.
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// Determine what to set file block size to.
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if (pCreateOpts != NULL)
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{
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pDb->m_pSFileHdl->setBlockSize(
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flmAdjustBlkSize( pCreateOpts->uiBlockSize));
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}
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else
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{
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pDb->m_pSFileHdl->setBlockSize( SFLM_DEFAULT_BLKSIZ);
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}
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if (RC_OK( gv_SFlmSysData.pFileSystem->doesFileExist( pszFilePath)))
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{
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rc = RC_SET( NE_SFLM_DATABASE_EXISTS);
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goto Exit;
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}
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// Create the .db file.
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pDb->m_pSFileHdl->setMaxAutoExtendSize( gv_SFlmSysData.uiMaxFileSize);
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pDb->m_pSFileHdl->setExtendSize( pDb->m_pDatabase->m_uiFileExtendSize);
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if (RC_BAD( rc = pDb->m_pSFileHdl->createFile( 0)))
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{
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goto Exit;
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}
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bDatabaseCreated = TRUE;
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(void)flmStatGetDb( &pDb->m_Stats, pDatabase,
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0, &pDb->m_pDbStats, NULL, NULL);
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// We must have exclusive access. Create a lock file for that
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// purpose, if there is not already a lock file.
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// NOTE: No need for a lock file if this is a temporary database.
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if (!bTempDb)
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{
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if (RC_BAD( rc = pDatabase->getExclAccess( pszFilePath)))
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{
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goto Exit;
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}
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}
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if (RC_BAD( rc = pDb->initDbFiles( pszRflDir, pCreateOpts)))
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{
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goto Exit;
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}
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// Disable RFL logging (m_pRfl was initialized in initDbFiles)
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if( pDatabase->m_pRfl)
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{
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pDatabase->m_pRfl->disableLogging( &uiRflToken);
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}
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// Set FFILE stuff to same state as a completed checkpoint.
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pDatabase->m_uiFirstLogCPBlkAddress = 0;
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pDatabase->m_uiLastCheckpointTime = (FLMUINT)FLM_GET_TIMER();
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// Create a checkpoint thread - no need if this is a temporary
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// database.
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if (!bTempDb)
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{
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if (RC_BAD( rc = pDatabase->startCPThread()))
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{
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goto Exit;
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}
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if( RC_BAD( rc = pDatabase->startMaintThread()))
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{
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goto Exit;
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}
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}
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Exit:
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if (bMutexLocked)
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{
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f_mutexUnlock( gv_SFlmSysData.hShareMutex);
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}
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if (pDb)
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{
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pDb->completeOpenOrCreate( rc, bNewDatabase);
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// completeOpenOrCreate will delete pDb if RC_BAD( rc)
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if (RC_BAD( rc))
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{
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pDb = NULL;
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}
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else
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{
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*ppDb = pDb;
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pDb = NULL; // This isn't strictly necessary, but it makes it
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// obvious that we are no longer using the object.
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}
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}
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if (RC_BAD( rc))
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{
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if (bDatabaseCreated)
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{
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F_DbSystem dbSystem;
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dbSystem.dbRemove( pszFilePath, pszDataDir, pszRflDir, TRUE);
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}
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}
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else if( uiRflToken)
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{
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pDatabase->m_pRfl->enableLogging( &uiRflToken);
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}
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return( rc);
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}
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/****************************************************************************
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Desc: Create a database - initialize all physical areas & data dictionary.
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****************************************************************************/
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RCODE F_Db::initDbFiles(
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const char * pszRflDir,
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SFLM_CREATE_OPTS * pCreateOpts) // Create options for the database.
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{
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RCODE rc = NE_SFLM_OK;
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FLMUINT bTransStarted = FALSE;
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FLMBYTE * pucBuf = NULL;
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FLMUINT uiBlkSize;
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FLMUINT uiWriteBytes;
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FLMUINT uiRflToken = 0;
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SFLM_DB_HDR * pDbHdr;
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F_BLK_HDR * pBlkHdr;
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F_CachedBlock * pSCache = NULL;
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FLMBYTE * pucWrappingKey = NULL;
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#ifdef FLM_USE_NICI
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FLMUINT32 ui32KeyLen = 0;
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#endif
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// Determine what size of buffer to allocate.
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uiBlkSize = (FLMUINT)(pCreateOpts
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? flmAdjustBlkSize( pCreateOpts->uiBlockSize)
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: (FLMUINT)SFLM_DEFAULT_BLKSIZ);
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// Allocate a buffer for writing.
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if (RC_BAD( rc = f_alloc( (FLMUINT)uiBlkSize, &pucBuf)))
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{
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goto Exit;
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}
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// Initialize the database header structure.
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pDbHdr = (SFLM_DB_HDR *)pucBuf;
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flmInitDbHdr( pCreateOpts, TRUE, m_pDatabase->m_bTempDb, pDbHdr);
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m_pDatabase->m_uiBlockSize = (FLMUINT)pDbHdr->ui16BlockSize;
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m_pDatabase->m_uiDefaultLanguage = (FLMUINT)pDbHdr->ui8DefaultLanguage;
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m_pDatabase->m_uiMaxFileSize = (FLMUINT)pDbHdr->ui32MaxFileSize;
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m_pDatabase->m_uiSigBitsInBlkSize = calcSigBits( uiBlkSize);
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f_memcpy( &m_pDatabase->m_lastCommittedDbHdr, pDbHdr, sizeof( SFLM_DB_HDR));
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// Create the first block file.
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if (!m_pDatabase->m_bTempDb)
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{
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if (RC_BAD( rc = m_pSFileHdl->createFile( 1)))
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{
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goto Exit;
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}
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}
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#ifdef FLM_USE_NICI
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if (RC_BAD( rc = createDbKey()))
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{
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goto Exit;
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}
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if (RC_BAD( rc = m_pDatabase->m_pWrappingKey->getKeyToStore(
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&pucWrappingKey,
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&ui32KeyLen,
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m_pDatabase->m_pszDbPasswd,
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NULL)))
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{
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goto Exit;
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}
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f_memcpy( m_pDatabase->m_lastCommittedDbHdr.DbKey,
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pucWrappingKey,
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ui32KeyLen);
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m_pDatabase->m_lastCommittedDbHdr.ui32DbKeyLen = ui32KeyLen;
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m_pDatabase->m_rcLimitedCode = NE_SFLM_OK;
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m_pDatabase->m_bInLimitedMode = FALSE;
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m_pDatabase->m_bHaveEncKey = TRUE;
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#else
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m_pDatabase->m_rcLimitedCode = NE_SFLM_ENCRYPTION_UNAVAILABLE;
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m_pDatabase->m_bInLimitedMode = TRUE;
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m_pDatabase->m_bHaveEncKey = FALSE;
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#endif
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// Write out the log header
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if (RC_BAD( rc = m_pDatabase->writeDbHdr( m_pDbStats, m_pSFileHdl,
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&m_pDatabase->m_lastCommittedDbHdr,
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NULL, TRUE)))
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{
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goto Exit;
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}
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// Initialize and output the first LFH block
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if (m_pDatabase->m_bTempDb)
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{
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getDbHdrInfo( &m_pDatabase->m_lastCommittedDbHdr);
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if (RC_BAD( rc = m_pDatabase->createBlock( this, &pSCache)))
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{
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goto Exit;
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}
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pBlkHdr = (F_BLK_HDR *)pSCache->m_pBlkHdr;
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m_pDatabase->m_lastCommittedDbHdr.ui32FirstLFBlkAddr = pBlkHdr->ui32BlkAddr;
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}
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else
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{
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// Copy the Db header to the checkpointDbHdr buffer.
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// This is now the first official checkpoint version of the log
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// header. It must be copied to the checkpointDbHdr buffer so that
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// it will not be lost in subsequent calls to flmWriteDbHdr.
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f_memcpy( &m_pDatabase->m_checkpointDbHdr, &m_pDatabase->m_lastCommittedDbHdr,
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sizeof( SFLM_DB_HDR));
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f_memset( pucBuf, 0, uiBlkSize);
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pBlkHdr = (F_BLK_HDR *)pucBuf;
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pBlkHdr->ui32BlkAddr = m_pDatabase->m_lastCommittedDbHdr.ui32FirstLFBlkAddr;
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pBlkHdr->ui64TransID = 0;
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}
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pBlkHdr->ui8BlkType = BT_LFH_BLK;
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pBlkHdr->ui16BlkBytesAvail = (FLMUINT16)(uiBlkSize - SIZEOF_STD_BLK_HDR);
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blkSetNativeFormat( pBlkHdr);
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if (!m_pDatabase->m_bTempDb)
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{
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pBlkHdr->ui32BlkCRC = calcBlkCRC( pBlkHdr, SIZEOF_STD_BLK_HDR);
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if (RC_BAD( rc = m_pSFileHdl->writeBlock(
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(FLMUINT)pBlkHdr->ui32BlkAddr,
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uiBlkSize, pucBuf, uiBlkSize, NULL,
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&uiWriteBytes)))
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{
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goto Exit;
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}
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// Force things to disk.
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if (RC_BAD( rc = m_pSFileHdl->flush()))
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{
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goto Exit;
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}
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}
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// Allocate the pRfl object. Could not do this until this point
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// because we need to have the version number, block size, etc.
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// setup in the database header
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flmAssert( !m_pDatabase->m_pRfl);
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if (!m_pDatabase->m_bTempDb)
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{
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if ((m_pDatabase->m_pRfl = f_new F_Rfl) == NULL)
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{
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rc = RC_SET( NE_SFLM_MEM);
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goto Exit;
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}
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if( RC_BAD( rc = m_pDatabase->m_pRfl->setup( m_pDatabase, pszRflDir)))
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{
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goto Exit;
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}
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// Disable RFL logging
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m_pDatabase->m_pRfl->disableLogging( &uiRflToken);
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// Start an update transaction and populate the dictionary.
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// This also creates the default collections and indexes.
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if (RC_BAD( rc = beginTrans( SFLM_UPDATE_TRANS)))
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{
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goto Exit;
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}
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bTransStarted = TRUE;
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if (RC_BAD( rc = dictCreate()))
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{
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goto Exit;
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}
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// Because the checkpoint thread has not yet been created,
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// flmCommitDbTrans will force a checkpoint when it completes,
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// ensuring a consistent database state.
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bTransStarted = FALSE;
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if (RC_BAD( rc = commitTrans( 0, TRUE)))
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{
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goto Exit;
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}
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}
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else
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{
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// The uncommitted header must have all of the stuff from the committed header
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// in order for this to be able to work as if an update transaction was in
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// progress.
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f_memcpy( &m_pDatabase->m_uncommittedDbHdr, &m_pDatabase->m_lastCommittedDbHdr,
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sizeof( SFLM_DB_HDR));
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}
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Exit:
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// Free the temporary buffer, if it was allocated.
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f_free( &pucBuf);
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if (pucWrappingKey)
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{
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f_free( &pucWrappingKey);
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}
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if (bTransStarted)
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{
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abortTrans();
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}
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if( uiRflToken)
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{
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m_pDatabase->m_pRfl->enableLogging( &uiRflToken);
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}
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if (pSCache)
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{
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ScaReleaseCache( pSCache, FALSE);
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}
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return( rc);
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}
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