MiUpdateActiveSubsection

UINT8 __fastcall MiUpdateActiveSubsection(UINT64 GrantedAccess, UINT64 DesiredAccess){
  _SUBSECTION *v2; 
  unsigned int v3; 
  NTSTATUS FileExtents; 
  UINT64 v5; 
  INT64 *v6; 
  unsigned __int8 v7; 
  unsigned int v8; 
  int v9; 
  __int64 v10; 
  UINT64 AllocationFlags; 
  unsigned int v13; 
  __int64 v14; 

  v2 = (_SUBSECTION *)GrantedAccess;
  v3 = 0;
  v14 = *(_QWORD *)GrantedAccess;
  LOBYTE(FileExtents) = 0;
  v5 = 0i64;
  v6 = (INT64 *)(*(_QWORD *)GrantedAccess + 72i64);
  v7 = ExAcquireSpinLockExclusive(v6);
  do
  {
    if( !v2->SubsectionBase || (v2->_bf_34 & 0x40000000) == 0 )
      goto LABEL_10;
    if( MiReferenceSubsection(v2, 0i64) < 2 )
    {
      ExReleaseSpinLockExclusiveFromDpcLevel(v6);
      __writecr8(v7);
      return 0;
    }
    v8 = v2->PtesInSubsection - (v2->_bf_34 & 0x3FFFFFFF);
    v13 = v8;
    ExReleaseSpinLockExclusiveFromDpcLevel(v6);
    __writecr8(v7);
    LODWORD(AllocationFlags) = 0;
    FileExtents = MiAllocateFileExtents(v2, 0i64, v2->SubsectionBase, v8, AllocationFlags);
    v9 = 0;
    v7 = ExAcquireSpinLockExclusive(v6);
    if( FileExtents >= 0 && v13 != v2->PtesInSubsection - (v2->_bf_34 & 0x3FFFFFFF) )
      v9 = 1;
    LODWORD(v10) = MiDecrementSubsections(v2, v2, 0i64);
    v5 += v10;
    if( v9 != 1 )
    {
      if( FileExtents < 0 )
        break;
LABEL_10:
      v2 = v2->NextSubsection;
    }
  }
  while( v2 );
  ExReleaseSpinLockExclusiveFromDpcLevel(v6);
  __writecr8(v7);
  if( v5 )
  {
    LOBYTE(v3) = *(_QWORD *)(v14 + 64) != 0i64;
    MiReturnCrossPartitionSectionCharges(
      *(_MI_CROSS_PARTITION_CHARGES **)(*(&stru_140C4DB30 + 267) + 8i64 * (*(_WORD *)(v14 + 60) & 0x3FF)),
      v3,
      v5);
  }
  return FileExtents;
}

Referenced by: