udfs.rar_read u_udf_udfs

/*++ Copyright (c) 1989 Microsoft Corporation Module Name: StrucSup.c Abstract: This module implements the Udfs in-memory data structure manipulation routines Author: Dan Lovinger [DanLo] 19-Jun-1996 Revision History: --*/ #include "UdfProcs.h" // // The Bug check file id for this module // #define BugCheckFileId (UDFS_BUG_CHECK_STRUCSUP) // // The local debug trace level // #define Dbg (UDFS_DEBUG_LEVEL_STRUCSUP) // // Local structures // typedef struct _FCB_TABLE_ELEMENT { FILE_ID FileId; PFCB Fcb; } FCB_TABLE_ELEMENT, *PFCB_TABLE_ELEMENT; // // Local macros // // // PFCB // UdfAllocateFcbData ( // IN PIRP_CONTEXT IrpContext // ); // // VOID // UdfDeallocateFcbData ( // IN PIRP_CONTEXT IrpContext, // IN PFCB Fcb // ); // // PFCB // UdfAllocateFcbIndex ( // IN PIRP_CONTEXT IrpContext // ); // // VOID // UdfDeallocateFcbIndex ( // IN PIRP_CONTEXT IrpContext, // IN PFCB Fcb // ); // // PFCB_NONPAGED // UdfAllocateFcbNonpaged ( // IN PIRP_CONTEXT IrpContext // ); // // VOID // UdfDeallocateFcbNonpaged ( // IN PIRP_CONTEXT IrpContext, // IN PFCB_NONPAGED FcbNonpaged // ); // // PCCB // UdfAllocateCcb ( // IN PIRP_CONTEXT IrpContext // ); // // VOID // UdfDeallocateCcb ( // IN PIRP_CONTEXT IrpContext, // IN PCCB Ccb // ); // #define UdfAllocateFcbData(IC) \ ExAllocateFromPagedLookasideList( &UdfFcbDataLookasideList ); #define UdfDeallocateFcbData(IC,F) \ ExFreeToPagedLookasideList( &UdfFcbDataLookasideList, F ); #define UdfAllocateFcbIndex(IC) \ ExAllocateFromPagedLookasideList( &UdfFcbIndexLookasideList ); #define UdfDeallocateFcbIndex(IC,F) \ ExFreeToPagedLookasideList( &UdfFcbIndexLookasideList, F ); #define UdfAllocateFcbNonpaged(IC) \ ExAllocateFromNPagedLookasideList( &UdfFcbNonPagedLookasideList ); #define UdfDeallocateFcbNonpaged(IC,FNP) \ ExFreeToNPagedLookasideList( &UdfFcbNonPagedLookasideList, FNP ); #define UdfAllocateCcb(IC) \ ExAllocateFromPagedLookasideList( &UdfCcbLookasideList ); #define UdfDeallocateCcb(IC,C) \ ExFreeToPagedLookasideList( &UdfCcbLookasideList, C ); // // VOID // UdfInsertFcbTable ( // IN PIRP_CONTEXT IrpContext, // IN PFCB Fcb // ); // // VOID // UdfDeleteFcbTable ( // IN PIRP_CONTEXT IrpContext, // IN PFCB Fcb // ); // #define UdfInsertFcbTable(IC,F) { \ FCB_TABLE_ELEMENT _Key; \ _Key.Fcb = (F); \ _Key.FileId = (F)->FileId; \ RtlInsertElementGenericTable( &(F)->Vcb->FcbTable, \ &_Key, \ sizeof( FCB_TABLE_ELEMENT ), \ NULL ); \ } #define UdfDeleteFcbTable(IC,F) { \ FCB_TABLE_ELEMENT _Key; \ _Key.FileId = (F)->FileId; \ RtlDeleteElementGenericTable( &(F)->Vcb->FcbTable, &_Key ); \ } // // Discovers the partition the current allocation descriptor's referred extent // is on, either explicitly throuigh the descriptor or implicitly through the // mapped view. // INLINE USHORT UdfGetPartitionOfCurrentAllocation ( IN PALLOC_ENUM_CONTEXT AllocContext ) { if (AllocContext->AllocType == ICBTAG_F_ALLOC_LONG) { return ((PLONGAD) AllocContext->Alloc)->Start.Partition; } else { return AllocContext->IcbContext->Active.Partition; } } // // Builds the Mcb in an Fcb. Use this after knowing that an Mcb is required // for mapping information. // INLINE VOID UdfInitializeFcbMcb ( IN PFCB Fcb ) { // // In certain rare situations, we may get called more than once. // Just reset the allocations. // if (FlagOn( Fcb->FcbState, FCB_STATE_MCB_INITIALIZED )) { FsRtlResetLargeMcb( &Fcb->Mcb, TRUE ); } else { FsRtlInitializeLargeMcb( &Fcb->Mcb, UdfPagedPool ); SetFlag( Fcb->FcbState, FCB_STATE_MCB_INITIALIZED ); } } // // Teardown an Fcb's Mcb as required. // INLINE VOID UdfUninitializeFcbMcb ( IN PFCB Fcb ) { if (FlagOn( Fcb->FcbState, FCB_STATE_MCB_INITIALIZED )) { FsRtlUninitializeLargeMcb( &Fcb->Mcb ); ClearFlag( Fcb->FcbState, FCB_STATE_MCB_INITIALIZED ); } } // // Local support routines // PVOID UdfAllocateTable ( IN PRTL_GENERIC_TABLE Table, IN CLONG ByteSize ); PFCB_NONPAGED UdfCreateFcbNonPaged ( IN PIRP_CONTEXT IrpContext ); VOID UdfDeleteFcbNonpaged ( IN PIRP_CONTEXT IrpContext, IN PFCB_NONPAGED FcbNonpaged ); VOID UdfDeallocateTable ( IN PRTL_GENERIC_TABLE Table, IN PVOID Buffer ); RTL_GENERIC_COMPARE_RESULTS UdfFcbTableCompare ( IN PRTL_GENERIC_TABLE Table, IN PVOID id1, IN PVOID id2 ); VOID UdfInitializeAllocationContext ( IN PIRP_CONTEXT IrpContext, IN PALLOC_ENUM_CONTEXT AllocContext, IN PICB_SEARCH_CONTEXT IcbContext ); BOOLEAN UdfGetNextAllocation ( IN PIRP_CONTEXT IrpContext, IN PALLOC_ENUM_CONTEXT AllocContext ); BOOLEAN UdfGetNextAllocationPostProcessing ( IN PIRP_CONTEXT IrpContext, IN PALLOC_ENUM_CONTEXT AllocContext ); VOID UdfLookupActiveIcbInExtent ( IN PIRP_CONTEXT IrpContext, IN PICB_SEARCH_CONTEXT IcbContext, IN ULONG Recurse ); VOID UdfInitializeEaContext ( IN PIRP_CONTEXT IrpContext, IN PEA_SEARCH_CONTEXT EaContext, IN PICB_SEARCH_CONTEXT IcbContext, IN ULONG EAType, IN UCHAR EASubType ); BOOLEAN UdfLookupEa ( IN PIRP_CONTEXT IrpContext, IN PEA_SEARCH_CONTEXT EaContext ); #ifdef ALLOC_PRAGMA #pragma alloc_text(PAGE, UdfAllocateTable) #pragma alloc_text(PAGE, UdfCleanupIcbContext) #pragma alloc_text(PAGE, UdfCleanupIrpContext) #pragma alloc_text(PAGE, UdfCreateCcb) #pragma alloc_text(PAGE, UdfCreateFcb) #pragma alloc_text(PAGE, UdfCreateFcbNonPaged) #pragma alloc_text(PAGE, UdfCreateIrpContext) #pragma alloc_text(PAGE, UdfDeallocateTable) #pragma alloc_text(PAGE, UdfDeleteCcb) #pragma alloc_text(PAGE, UdfDeleteFcb) #pragma alloc_text(PAGE, UdfDeleteFcbNonpaged) #pragma alloc_text(PAGE, UdfDeleteVcb) #pragma alloc_text(PAGE, UdfFcbTableCompare) #pragma alloc_text(PAGE, UdfFindInParseTable) #pragma alloc_text(PAGE, UdfGetNextAllocation) #pragma alloc_text(PAGE, UdfGetNextAllocationPostProcessing) #pragma alloc_text(PAGE, UdfGetNextFcb) #pragma alloc_text(PAGE, UdfInitializeAllocationContext) #pragma alloc_text(PAGE, UdfInitializeAllocations) #pragma alloc_text(PAGE, UdfInitializeEaContext) #pragma alloc_text(PAGE, UdfInitializeFcbFromIcbContext) #pragma alloc_text(PAGE, UdfInitializeIcbContext) #pragma alloc_text(PAGE, UdfInitializeStackIrpContext) #pragma alloc_text(PAGE, UdfInitializeVcb) #pragma alloc_text(PAGE, UdfLookupActiveIcb) #pragma alloc_text(PAGE, UdfLookupActiveIcbInExtent) #pragma alloc_text(PAGE, UdfLookupEa) #pragma alloc_text(PAGE, UdfLookupFcbTable) #pragma alloc_text(PAGE, UdfTeardownStructures) #pragma alloc_text(PAGE, UdfUpdateTimestampsFromIcbContext) #pragma alloc_text(PAGE, UdfUpdateVcbPhase0) #pragma alloc_text(PAGE, UdfUpdateVcbPhase1) #pragma alloc_text(PAGE, UdfVerifyDescriptor) #endif ALLOC_PRAGMA  BOOLEAN UdfInitializeVcb ( IN PIRP_CONTEXT IrpContext, IN OUT PVCB Vcb,