author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 26 Jan 2010 12:06:03 +0200 | |
changeset 4 | 32704c33136d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* Definition of CIntegrityServices |
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* |
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*/ |
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|
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/** |
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@file |
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@released |
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@internalTechnology |
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*/ |
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#ifndef __INTEGRITYSERVICES_H__ |
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#define __INTEGRITYSERVICES_H__ |
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#include <e32base.h> |
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#include <f32file.h> |
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#include <e32ldr_private.h> |
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#include "integrityservicesevent.h" |
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namespace Swi |
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{ |
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class CJournal; |
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class CIntegrityTreeNode; |
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/** |
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* This class maintains the integrity of installed software by ensuring that |
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* the device is always left in a consistent state. If a software modification |
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* process (install, upgrade or uninstall) is interrupted then that process is |
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* reverted, returning the device to its original state with no orphaned or |
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* missing files. |
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* |
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* @released |
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* @internalTechnology |
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*/ |
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class CIntegrityServices : public CBase |
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{ |
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public: |
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/** |
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* Constructs a new CIntegrityServices object specifying a path for |
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* the journal files |
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* |
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* @code |
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* |
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* TTime currentTime; |
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* currentTime.UniversalTime(); |
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* _LIT(KIntegrityServicesPath, "\\private\\SID\\"); |
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* iIntegrityServices = CIntegrityServices::NewL(currentTime.Int64(), |
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* KIntegrityServicesPath); |
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* |
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* @endcode |
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* |
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* @param aTransactionID A unique ID provided by the client to |
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* identify this transaction. It is suggested |
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* that the client use the current time as the |
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* unique ID. This value can then be shared |
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* between different processes so that they use |
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* the same journal. |
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* @param aPath The path in which to read and write journal |
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* files. eg "\\private\\SID\\" |
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*/ |
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IMPORT_C static CIntegrityServices* NewL(TInt64 aTransactionID, const TDesC& aPath); |
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|
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/** |
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* Constructs a new CIntegrityServices object specifying a path for |
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* the journal files and puts it on the cleanup stack |
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* |
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* @code |
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* |
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* TTime currentTime; |
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* currentTime.UniversalTime(); |
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* _LIT(KIntegrityServicesPath, "\\private\\SID\\"); |
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* iIntegrityServices = CIntegrityServices::NewL(currentTime.Int64(), |
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* KIntegrityServicesPath); |
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* |
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* @endcode |
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* |
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* @param aTransactionID A unique ID provided by the client to |
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* identify this transaction. It is suggested |
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* that the client use the current time as the |
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* unique ID. This value can then be shared |
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* between different processes so that they use |
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* the same journal. |
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* @param aPath The path in which to read and write journal |
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* files. eg "\\private\\SID\\" |
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*/ |
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IMPORT_C static CIntegrityServices* NewLC(TInt64 aTransactionID, const TDesC& aPath); |
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IMPORT_C virtual ~CIntegrityServices(); |
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/** |
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* Notifies Integrity Services that a file or directory is being added |
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* so that it can be removed if a rollback occurs. A record is created |
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* in the journal file on the appropriate drive. |
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* |
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* @param aFileName - Name of file or directory including path |
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*/ |
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IMPORT_C void AddL(const TDesC& aFileName); |
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|
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/** |
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* Removes the specified file or directory, first backing it up before |
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* deleting it. A record is created in the journal file on the |
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* appropriate drive. |
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* |
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* @param aFileName - Name of file or directory including path |
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*/ |
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IMPORT_C void RemoveL(const TDesC& aFileName); |
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|
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/** |
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* Notifies Integrity Services that a file or directory is being added |
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* that must later be removed. A record is created in the journal file |
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* on the appropriate drive. |
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* |
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* @param aFileName - Name of file or directory including path |
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*/ |
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IMPORT_C void TemporaryL(const TDesC& aFileName); |
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|
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/** |
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* Commits the current transaction by deleting backup, temporary and |
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* journal files. The journal files are first refreshed so that |
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* operations shared between processes and spread across multiple |
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* drives are committed at the same time. If any journal file from this |
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* transaction is not present or has already been rolledback the |
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* commit will fail. |
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*/ |
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IMPORT_C void CommitL(); |
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|
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/** |
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* Starts the recovery process for all drives. |
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* Drive are rolled back independantly since removable media may be at |
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* a different state to internal drives (which may have already been |
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* rolled back). |
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* |
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* @param aAllTransactions if ETrue all transactions in the current |
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* path are rolled back otherwise only this |
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* transaction. |
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*/ |
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IMPORT_C void RollBackL(TBool aAllTransactions); |
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|
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/** |
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* Returns the TransactionID |
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* |
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* @return a TInt64 representing the transaction |
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*/ |
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inline TInt64 TransactionId() const; |
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|
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|
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/** |
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* Test if any journal files have started being rolled back. |
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* |
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* @return ETrue if any journal files have started being rolled back |
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* or EFalse otherwise. |
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*/ |
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inline TBool StartedJournalRollback() const; |
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|
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/** |
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* Failure types - indicate when to simulate power failure during |
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* testing |
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*/ |
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enum TFailType |
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{ |
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EFailNone, |
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EFailAddingNewFile, |
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EFailRemovingFile, |
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EFailAddingTempFile, |
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EFailRestoringFile, |
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EFailDeletingFile, |
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EFailInstallComplete, |
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EFailNewFilesRemoved, |
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EFailOldFilesRestored, |
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EFailTempFilesRemoved, |
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EFailBackupFilesRemoved, |
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}; |
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|
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/** |
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* Failure position - indicate when to simulate power failure during |
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* testing |
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*/ |
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enum TFailPosition |
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{ |
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EBeforeJournal, |
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EAfterJournal, |
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EBeforeAction, |
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EAfterAction |
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}; |
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|
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protected: |
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/** |
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* Constructor for CIntegrityServices |
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* |
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* @param aTransactionID A unique ID provided by the client to |
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* identify this transaction. It is suggested |
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* that the client use the current time as the |
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* unique ID. This value can then be shared |
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* between different processes so that they use |
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* the same journal. |
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*/ |
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IMPORT_C CIntegrityServices(TInt64 aTransactionID); |
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|
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/** |
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* Second phase constructor for CIntegrityServices |
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* |
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* @param aPath The path in which to read and write journal |
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* files. eg "\\private\\SID\\" |
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*/ |
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IMPORT_C void ConstructL(const TDesC& aPath); |
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|
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/** |
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* Function only implemented in derived test class. |
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* |
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* @param aFailType The operation on which to fail |
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* @param aFailPosition The position at which to fail |
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* @param aFailFileName The filename on which to fail |
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*/ |
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virtual void SimulatePowerFailureL(TFailType aFailType, TFailPosition aPosition, const TDesC& aFailFileName); |
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|
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private: |
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|
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/** |
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* Recovers the specified journal by either rolling back a failed |
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* installation or completing it if past the point of no return |
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* (ie backup files deleted). Processes the journal file on each drive |
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* used by this transaction one after the other. |
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* |
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* @param aJournal The journal to rollback |
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* |
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*/ |
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void RollBackJournalL(CJournal& aJournal); |
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|
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/** |
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* Performs recovery of the journal for a particular drive. |
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* |
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* @param aJournal The journal to rollback |
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* @param aDrive The drive to rollback |
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*/ |
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void RollBackDriveL(CJournal& aJournal, TInt aDrive); |
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|
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/** |
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* Restores backup files to their original location |
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* |
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* @param aJournal The journal for which files are to be restored |
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*/ |
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void RestoreFilesL(CJournal& aJournal, TInt aDrive = -1); |
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|
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/** |
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* Function deletes all files in the list but does NOT fail |
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* if a file cannot be found |
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* |
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* @param aJournal The journal for which files are to be deleted |
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* @param aEvent Files corresponding to this event are deleted. |
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*/ |
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void DeleteFilesL(CJournal& aJournal, TIntegrityServicesEvent aEvent, TInt aDrive = -1); |
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|
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/** |
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* Removes a trailing slash from directory name, if needed. |
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* |
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* @param aFileName the filename to modify. If the filename does not represent a directory, it is not modified |
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*/ |
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static void NormalizeDirectoryName(TDes& aFileName); |
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|
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/** |
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Creates a backup file by copying the source to a defined backup name. This MUST be used for executables. |
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The source files will then be deleted by invoking RLoader::Delete |
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@param aSource the file to backup |
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@param aBackup the name of the backup file |
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*/ |
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void CopyToBackupL(const TDesC& aSource, const TDesC& aBackup); |
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|
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private: |
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|
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/** |
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* Pointer to the journal - uses log file(s) for persistant storage |
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* A log file is created on each drive involved so that they can be |
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* recovered independantly. |
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*/ |
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CJournal* iJournal; |
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|
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/** |
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* Provided by the client to identify this transaction. |
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*/ |
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TInt64 iTransactionID; |
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|
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/** |
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* The supplied path in which to read and write journal files. |
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*/ |
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TPath iJournalPath; |
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|
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/** |
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* True if rollback has been started on at least one journal file. |
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*/ |
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TBool iStartedJournalRollback; |
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|
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/** |
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The drive number for the system drive. |
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*/ |
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TDriveNumber iSystemDrive; |
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|
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protected: |
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RFs iFs; |
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RLoader iLoader; |
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|
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/** |
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* Failure type (used only by test code) |
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*/ |
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TFailType iFailType; |
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/** |
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* Failure position (used only by test code) |
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*/ |
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TFailPosition iFailPosition; |
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/** |
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* Specify the name of the file to fail on (used only in test code) |
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*/ |
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TFileName iFailFileName; |
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friend class CIntegrityTreeNode; |
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}; |
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inline TInt64 CIntegrityServices::TransactionId() const |
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{ |
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return iTransactionID; |
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} |
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inline TBool CIntegrityServices::StartedJournalRollback() const |
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{ |
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return iStartedJournalRollback; |
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} |
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} //namespace |
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#endif |