/*++

Copyright?（c）?1991??Microsoft?Corporation

Module?Name:

????AllocSup.c

Abstract:

????This?module?implements?the?general?file?stream?allocation?&?truncation
????routines?for?Ntfs

Author:

????Tom?Miller??????[TomM]??????????15-Jul-1991

Revision?History:

--*/

#include?“NtfsProc.h“

//
//??Local?debug?trace?level
//

#ifndef?Dbg
#define?Dbg??????????????????????????????（DEBUG_TRACE_LOGSUP）
#endif
//
//??Internal?support?routines
//

VOID
NtfsDeleteAllocationInternal?（
????IN?PIRP_CONTEXT?IrpContext
????IN?PFILE_object?Fileobject?OPTIONAL
????IN?OUT?PSCB?Scb
????IN?VCN?StartingVcn
????IN?VCN?EndingVcn
????IN?BOOLEAN?LogIt
????）;

#ifdef?ALLOC_PRAGMA
#pragma?alloc_text（PAGE?NtfsPreloadAllocation）
#pragma?alloc_text（PAGE?NtfsAddAllocation）
#pragma?alloc_text（PAGE?NtfsAllocateAttribute）
#pragma?alloc_text（PAGE?NtfsBuildMappingPairs）
#pragma?alloc_text（PAGE?NtfsDeleteAllocation）
#pragma?alloc_text（PAGE?NtfsDeleteAllocationInternal）
#pragma?alloc_text（PAGE?NtfsGetHighestVcn）
#pragma?alloc_text（PAGE?NtfsGetSizeForMappingPairs）
#endif


ULONG
NtfsPreloadAllocation?（
????IN?PIRP_CONTEXT?IrpContext
????IN?OUT?PSCB?Scb
????IN?VCN?StartingVcn
????IN?VCN?EndingVcn
????）

/*++

Routine?Description:

????This?routine?assures?that?all?ranges?of?the?Mcb?are?loaded?in?the?specified
????Vcn?range

Arguments:

????Scb?-?Specifies?which?Scb?is?to?be?preloaded

????StartingVcn?-?Specifies?the?first?Vcn?to?be?loaded

????EndingVcn?-?Specifies?the?last?Vcn?to?be?loaded

Return?Value:

????Number?of?ranges?spanned?by?the?load?request.

--*/

{
????VCN?CurrentVcn?LastCurrentVcn;
????LCN?Lcn;
????LONGLONG?Count;
????PVOID?RangePtr;
????ULONG?RunIndex;
????ULONG?RangesLoaded?=?0;

????PAGED_CODE（）;

????//
????//??Start?with?starting?Vcn
????//

????CurrentVcn?=?StartingVcn;

????//
????//??Always?load?the?nonpaged?guys?from?the?front?so?we?don‘t
????//??produce?an?Mcb?with?a?“known?hole“.
????//

????if?（FlagOn（Scb->Fcb->FcbState?FCB_STATE_NONPAGED））?{
????????CurrentVcn?=?0;
????}

????//
????//??Loop?until?it‘s?all?loaded.
????//

????while?（CurrentVcn?<=?EndingVcn）?{

????????//
????????//??Remember?this?CurrentVcn?as?a?way?to?know?when?we?have?hit?the?end
????????//??（stopped?making?progress）.
????????//

????????LastCurrentVcn?=?CurrentVcn;

????????//
????????//??Load?range?with?CurrentVcn?and?if?it?is?not?there?get?out.
????????//

????????（VOID）NtfsLookupAllocation（IrpContext?Scb?CurrentVcn?&Lcn?&Count?&RangePtr?&RunIndex）;

????????//
????????//??Find?out?how?many?runs?there?are?in?this?range
????????//

????????if?（!NtfsNumberOfRunsInRange（&Scb->Mcb?RangePtr?&RunIndex）?||?（RunIndex?==?0））?{
????????????break;
????????}

????????//
????????//??Get?the?highest?run?in?this?range?and?calculate?the?next?Vcn?beyond?this?range.
????????//

????????NtfsGetNextNtfsMcbEntry（&Scb->Mcb?&RangePtr?RunIndex?-?1?&CurrentVcn?&Lcn?&Count）;

????????CurrentVcn?+=?Count;

????????//
????????//??If?we?are?making?no?progress?we?must?have

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????100498??2009-05-20?10:07??ntfs\allocsup.c

?????文件???????8619??1997-08-27?11:41??ntfs\attrdata.c

?????文件?????427873??2009-05-20?13:01??ntfs\attrsup.c

?????文件?????242008??2009-06-01?09:14??ntfs\bitmpsup.c

?????文件??????41437??2009-05-20?09:52??ntfs\cachesup.c

?????文件??????23352??1997-08-27?11:41??ntfs\checksup.c

?????文件??????76337??2009-05-20?13:18??ntfs\cleanup.c

?????文件??????29683??2009-05-20?09:56??ntfs\close.c

?????文件??????15536??2009-05-20?10:14??ntfs\colatsup.c

?????文件?????352499??2009-05-29?11:31??ntfs\create.c

?????文件??????20163??2009-05-20?09:19??ntfs\ddkbuild.bat

?????文件???????5275??2009-05-20?13:14??ntfs\devctrl.c

?????文件?????251718??2009-05-20?10:06??ntfs\deviosup.c

?????文件??????45901??2009-05-20?13:17??ntfs\dirctrl.c

?????文件??????68151??2009-05-20?13:17??ntfs\ea.c

?????文件??????20943??1997-08-27?11:41??ntfs\fieldoff.c

?????文件?????243602??2009-05-20?13:16??ntfs\fileinfo.c

?????文件???????8175??2009-05-20?13:02??ntfs\filobsup.c

?????文件??????54989??2009-05-20?13:12??ntfs\flush.c

?????文件?????238765??2009-05-31?22:11??ntfs\fsctrl.c

?????文件??????22349??2009-05-20?13:16??ntfs\fspdisp.c

?????文件??????50330??2009-05-20?00:14??ntfs\fstiosup.c

?????文件???????3017??1997-08-27?11:41??ntfs\index.h

?????文件?????207857??2009-05-20?10:14??ntfs\indexsup.c

?????文件??????58978??2009-05-20?12:41??ntfs\lfs\cachesup.c

?????文件????????291??1997-08-27?11:49??ntfs\lfs\dirs

?????文件??????11224??2009-05-20?11:04??ntfs\lfs\lbcbsup.c

?????文件???????1882??2009-05-20?11:04??ntfs\lfs\lfsdata.c

?????文件???????6859??2009-05-20?11:00??ntfs\lfs\lfsdata.h

?????文件??????12042??2009-05-20?10:36??ntfs\lfs\lfsdisk.h

............此處省略82個文件信息