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863 lines
30 KiB
863 lines
30 KiB
/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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hivebin.c
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Abstract:
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This module implements HvpAddBin - used to grow a hive.
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Author:
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Bryan M. Willman (bryanwi) 27-Mar-92
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Environment:
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Revision History:
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--*/
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#include "cmp.h"
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//
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// Private function prototypes
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//
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BOOLEAN
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HvpCoalesceDiscardedBins(
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IN PHHIVE Hive,
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IN ULONG NeededSize,
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IN HSTORAGE_TYPE Type
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);
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE,HvpAddBin)
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#pragma alloc_text(PAGE,HvpCoalesceDiscardedBins)
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#endif
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PHBIN
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HvpAddBin(
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IN PHHIVE Hive,
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IN ULONG NewSize,
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IN HSTORAGE_TYPE Type
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)
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/*++
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Routine Description:
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Grows either the Stable or Volatile storage of a hive by adding
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a new bin. Bin will be allocated space in Stable store (e.g. file)
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if Type == Stable. Memory image will be allocated and initialized.
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Map will be grown and filled in to describe the new bin.
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WARNING:
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When adding a new bin, if the CM_VIEW_SIZE boundary is crossed:
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- add a free bin with the remaining space to the first CM_VIEW_SIZE barrier
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- from the next CM_VIEW_SIZE window, add a new bin of the desired size.
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Of course, this applies only to stable storage.
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Arguments:
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Hive - supplies a pointer to the hive control structure for the
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hive of interest
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NewSize - size of the object caller wishes to put in the hive. New
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bin will be at least large enough to hold this.
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Type - Stable or Volatile
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Return Value:
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Pointer to the new BIN if we succeeded, NULL if we failed.
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--*/
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{
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BOOLEAN UseForIo;
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PHBIN NewBin;
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PHBIN RemainingBin;
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ULONG OldLength;
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ULONG NewLength;
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ULONG CheckLength;
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ULONG OldMap;
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ULONG NewMap;
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ULONG OldTable;
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ULONG NewTable;
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PHMAP_DIRECTORY Dir = NULL;
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PHMAP_TABLE newt = NULL;
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PHMAP_ENTRY Me;
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PHCELL t;
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ULONG i;
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ULONG j;
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PULONG NewVector = NULL;
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PLIST_ENTRY Entry;
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PFREE_HBIN FreeBin = NULL;
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ULONG TotalDiscardedSize;
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PCMHIVE CmHive;
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PAGED_CODE();
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CmKdPrintEx((DPFLTR_CONFIG_ID,CML_HIVE,"HvpAddBin:\n"));
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CmKdPrintEx((DPFLTR_CONFIG_ID,CML_HIVE,"\tHive=%p NewSize=%08lx\n",Hive,NewSize));
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CmHive = (PCMHIVE)CONTAINING_RECORD(Hive, CMHIVE, Hive);
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RemainingBin = NULL;
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//
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// Round size up to account for bin overhead. Caller should
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// have accounted for cell overhead.
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//
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NewSize += sizeof(HBIN);
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if ((NewSize < HCELL_BIG_ROUND) &&
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((NewSize % HBLOCK_SIZE) > HBIN_THRESHOLD)) {
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NewSize += HBLOCK_SIZE;
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}
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//
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// Try not to create HBINs smaller than the page size of the machine
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// (it is not illegal to have bins smaller than the page size, but it
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// is less efficient)
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//
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NewSize = ROUND_UP(NewSize, ((HBLOCK_SIZE >= PAGE_SIZE) ? HBLOCK_SIZE : PAGE_SIZE));
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//
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// see if there's a discarded HBIN of the right size
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//
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TotalDiscardedSize = 0;
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Retry:
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Entry = Hive->Storage[Type].FreeBins.Flink;
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while (Entry != &Hive->Storage[Type].FreeBins) {
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FreeBin = CONTAINING_RECORD(Entry,
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FREE_HBIN,
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ListEntry);
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TotalDiscardedSize += FreeBin->Size;
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if ((FreeBin->Size >= NewSize) && ((CmHive->GrowOnlyMode == FALSE) || (Type == Volatile)) ) {
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if (!HvMarkDirty(Hive,
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FreeBin->FileOffset + (Type * HCELL_TYPE_MASK),
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FreeBin->Size,TRUE)) {
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goto ErrorExit1;
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}
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NewSize = FreeBin->Size;
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ASSERT_LISTENTRY(&FreeBin->ListEntry);
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RemoveEntryList(&FreeBin->ListEntry);
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#ifdef HV_TRACK_FREE_SPACE
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Hive->Storage[Type].FreeStorage -= (NewSize - sizeof(HBIN));
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ASSERT( (LONG)(Hive->Storage[Type].FreeStorage) >= 0 );
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#endif
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if ( FreeBin->Flags & FREE_HBIN_DISCARDABLE ) {
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//
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// HBIN is still in memory, don't need any more allocs, just
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// fill in the block addresses.
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//
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Me = NULL;
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for (i=0;i<NewSize;i+=HBLOCK_SIZE) {
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Me = HvpGetCellMap(Hive, FreeBin->FileOffset+i+(Type*HCELL_TYPE_MASK));
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VALIDATE_CELL_MAP(__LINE__,Me,Hive,FreeBin->FileOffset+i+(Type*HCELL_TYPE_MASK));
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Me->BlockAddress = HBIN_BASE(Me->BinAddress)+i;
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Me->BinAddress &= ~HMAP_DISCARDABLE;
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// we cannot have the FREE_BIN_DISCARDABLE flag set
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// and FREE_HBIN_INVIEW not set on a mapped bin.
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ASSERT( Me->BinAddress & HMAP_INPAGEDPOOL );
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// we don't need to set it to NULL - just for debug purposes
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ASSERT( (Me->CmView = NULL) == NULL );
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}
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(Hive->Free)(FreeBin, sizeof(FREE_HBIN));
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#if DBG
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{
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UNICODE_STRING HiveName;
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RtlInitUnicodeString(&HiveName, (PCWSTR)Hive->BaseBlock->FileName);
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CmKdPrintEx((DPFLTR_CONFIG_ID,CML_BIN_MAP,"HvpAddBin for (%p) (%.*S) reusing FreeBin %p at FileOffset %lx; Type = %lu\n",
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Hive,HiveName.Length / sizeof(WCHAR),HiveName.Buffer,HBIN_BASE(Me->BinAddress),((PHBIN)HBIN_BASE(Me->BinAddress))->FileOffset,(ULONG)Type));
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}
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#endif
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return (PHBIN)HBIN_BASE(Me->BinAddress);
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}
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break;
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}
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Entry = Entry->Flink;
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}
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if ((Entry == &Hive->Storage[Type].FreeBins) &&
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(TotalDiscardedSize >= NewSize)) {
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//
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// No sufficiently large discarded bin was found,
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// but the total discarded space is large enough.
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// Attempt to coalesce adjacent discarded bins into
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// a larger bin and retry.
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//
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if (HvpCoalesceDiscardedBins(Hive, NewSize, Type)) {
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goto Retry;
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}
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}
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//
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// we need these sooner to do the computations in case we allocate a new bin
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//
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OldLength = Hive->Storage[Type].Length;
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CheckLength = OldLength;
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//
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// Attempt to allocate the bin.
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//
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UseForIo = (BOOLEAN)((Type == Stable) ? TRUE : FALSE);
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if (Entry != &Hive->Storage[Type].FreeBins) {
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if( Type == Volatile ) {
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//
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// old plain method for volatile storage
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//
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//
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// Note we use ExAllocatePool directly here to avoid
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// charging quota for this bin again. When a bin
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// is discarded, its quota is not returned. This prevents
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// sparse hives from requiring more quota after
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// a reboot than on a running system.
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//
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NewBin = ExAllocatePoolWithTag((UseForIo) ? PagedPoolCacheAligned : PagedPool,
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NewSize,
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CM_HVBIN_TAG);
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if (NewBin == NULL) {
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InsertHeadList(&Hive->Storage[Type].FreeBins, Entry);
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#ifdef HV_TRACK_FREE_SPACE
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Hive->Storage[Type].FreeStorage += (NewSize - sizeof(HBIN));
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#endif
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// this call is a nop
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//HvMarkClean(Hive, FreeBin->FileOffset, FreeBin->Size);
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goto ErrorExit1;
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}
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} else {
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//
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// for Stable, map the view containing the bin in memory
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// and fix the map
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//
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Me = HvpGetCellMap(Hive, FreeBin->FileOffset);
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VALIDATE_CELL_MAP(__LINE__,Me,Hive,FreeBin->FileOffset);
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if( Me->BinAddress & HMAP_INPAGEDPOOL ) {
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ASSERT( (Me->BinAddress & HMAP_INVIEW) == 0 );
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//
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// bin is in paged pool; allocate backing store
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//
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NewBin = (Hive->Allocate)(NewSize, UseForIo,CM_FIND_LEAK_TAG15);
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if (NewBin == NULL) {
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InsertHeadList(&Hive->Storage[Type].FreeBins, Entry);
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#ifdef HV_TRACK_FREE_SPACE
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Hive->Storage[Type].FreeStorage += (NewSize - sizeof(HBIN));
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#endif
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goto ErrorExit1;
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}
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} else {
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//
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// The view containing this bin has been unmapped; map it again
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//
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if( (Me->BinAddress & HMAP_INVIEW) == 0 ) {
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ASSERT( (Me->BinAddress & HMAP_INPAGEDPOOL) == 0 );
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//
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// map the bin
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//
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if( !NT_SUCCESS(CmpMapThisBin((PCMHIVE)Hive,FreeBin->FileOffset,TRUE)) ) {
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InsertHeadList(&Hive->Storage[Type].FreeBins, Entry);
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#ifdef HV_TRACK_FREE_SPACE
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Hive->Storage[Type].FreeStorage += (NewSize - sizeof(HBIN));
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#endif
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return NULL;
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}
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}
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ASSERT( Me->BinAddress & HMAP_INVIEW );
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NewBin = (PHBIN)HBIN_BASE(Me->BinAddress);
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}
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}
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} else {
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#if 0
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//
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// this is no longer neccesssary as Mm is faulting one page at a time for MNW streams
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//
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ASSERT( (CM_VIEW_SIZE >= PAGE_SIZE) && (CM_VIEW_SIZE >= HBLOCK_SIZE) );
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//
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// Don't do unneccessary work for volatile storage or volatile hives
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//
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if( (Type == Stable) && (!(Hive->HiveFlags & HIVE_VOLATILE)) ) {
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ULONG RealHiveSize = OldLength + HBLOCK_SIZE;
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if( RealHiveSize != (RealHiveSize & (~(CM_VIEW_SIZE - 1)) ) ) {
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//
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// Hive size does not follow the CM_VIEW_SIZE increments pattern
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//
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ULONG FillUpSize;
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FillUpSize = ((OldLength + HBLOCK_SIZE + CM_VIEW_SIZE - 1) & (~(CM_VIEW_SIZE - 1))) - (OldLength + HBLOCK_SIZE);
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CmKdPrintEx((DPFLTR_CONFIG_ID,DPFLTR_TRACE_LEVEL,"HvpAddBin for (%p) NewSize (%lx) ",Hive,NewSize));
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if( FillUpSize >= NewSize ) {
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//
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// there is plenty of space in the remaining to the CM_VIEW_SIZE boundary to accomodate this bin
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// adjust the size of the bin
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//
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NewSize = FillUpSize;
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ASSERT( HvpCheckViewBoundary(CheckLength,CheckLength + NewSize - 1) == TRUE );
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CmKdPrintEx((DPFLTR_CONFIG_ID,DPFLTR_TRACE_LEVEL,"Fits in the remaining to boundary, Adjusting size to %lx",NewSize));
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} else {
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//
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// we don't have space to fit this bin in the remaining to the CM_VIEW_SIZE boundary
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// FillUpSize will be enlisted as a free bin. round up to CM_VIEW_SIZE
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//
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ASSERT( HvpCheckViewBoundary(CheckLength,CheckLength + NewSize - 1) == FALSE );
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NewSize = ROUND_UP(NewSize, CM_VIEW_SIZE);
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CmKdPrintEx((DPFLTR_CONFIG_ID,DPFLTR_TRACE_LEVEL,"Does not fit in the remaining to boundary, Rounding size to %lx",NewSize));
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}
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} else {
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//
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// Hive already follows the CM_VIEW_SIZE boundary pattern; don't break it
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//
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NewSize = ROUND_UP(NewSize, CM_VIEW_SIZE);
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CmKdPrintEx((DPFLTR_CONFIG_ID,DPFLTR_TRACE_LEVEL,"hive size already aligned, Rounding size to %lx",NewSize));
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}
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}
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#endif
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//
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// this is a totally new bin. Allocate it from paged pool
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//
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NewBin = (Hive->Allocate)(NewSize, UseForIo,CM_FIND_LEAK_TAG16);
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if (NewBin == NULL) {
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goto ErrorExit1;
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}
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}
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//
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// Init the bin
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//
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NewBin->Signature = HBIN_SIGNATURE;
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NewBin->Size = NewSize;
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NewBin->Spare = 0;
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t = (PHCELL)((PUCHAR)NewBin + sizeof(HBIN));
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t->Size = NewSize - sizeof(HBIN);
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if (USE_OLD_CELL(Hive)) {
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t->u.OldCell.Last = (ULONG)HBIN_NIL;
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}
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if (Entry != &Hive->Storage[Type].FreeBins) {
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//
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// found a discarded HBIN we can use, just fill in the map and we
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// are done.
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//
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for (i=0;i<NewSize;i+=HBLOCK_SIZE) {
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Me = HvpGetCellMap(Hive, FreeBin->FileOffset+i+(Type*HCELL_TYPE_MASK));
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VALIDATE_CELL_MAP(__LINE__,Me,Hive,FreeBin->FileOffset+i+(Type*HCELL_TYPE_MASK));
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Me->BlockAddress = (ULONG_PTR)NewBin + i;
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//
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// make sure to preserve the following flags:
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// HMAP_INVIEW|HMAP_INPAGEDPOOL
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// and to clear the flag
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// HMAP_DISCARDABLE
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//
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Me->BinAddress = (ULONG_PTR)((ULONG_PTR)NewBin | (Me->BinAddress&(HMAP_INVIEW|HMAP_INPAGEDPOOL)));
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Me->BinAddress &= ~HMAP_DISCARDABLE;
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if (i==0) {
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Me->BinAddress |= HMAP_NEWALLOC;
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Me->MemAlloc = NewSize;
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} else {
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Me->MemAlloc = 0;
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}
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}
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NewBin->FileOffset = FreeBin->FileOffset;
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(Hive->Free)(FreeBin, sizeof(FREE_HBIN));
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#if DBG
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{
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UNICODE_STRING HiveName;
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RtlInitUnicodeString(&HiveName, (PCWSTR)Hive->BaseBlock->FileName);
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CmKdPrintEx((DPFLTR_CONFIG_ID,CML_BIN_MAP,"HvpAddBin for (%p) (%.*S) reusing FreeBin %p at FileOffset %lx; Type = %lu\n",
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Hive,HiveName.Length / sizeof(WCHAR),HiveName.Buffer,NewBin,NewBin->FileOffset,(ULONG)Type));
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}
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#endif
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return(NewBin);
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}
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//
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// Compute map growth needed, grow the map
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//
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if( (HvpCheckViewBoundary(CheckLength,CheckLength + NewSize - 1) == FALSE) &&
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(NewSize < CM_VIEW_SIZE) // don't bother if we attempt to allocate a cell bigger then the view size
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// it'll cross the boundary anyway.
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) {
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//
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// the bin to be allocated doesn't fit into the remaining
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// of this CM_VIEW_SIZE window. Allocate it from the next CM_VIEW_SIZE window
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// and add the remaining of this to the free bin list
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//
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CheckLength += (NewSize+HBLOCK_SIZE);
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CheckLength &= (~(CM_VIEW_SIZE - 1));
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CheckLength -= HBLOCK_SIZE;
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#if DBG
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{
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UNICODE_STRING HiveName;
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RtlInitUnicodeString(&HiveName, (PCWSTR)Hive->BaseBlock->FileName);
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CmKdPrintEx((DPFLTR_CONFIG_ID,CML_BIN_MAP,"HvpAddBin for (%p) (%.*S) crossing boundary at %lx Size %lx, newoffset= %lx\n",Hive,HiveName.Length / sizeof(WCHAR),HiveName.Buffer,OldLength,NewSize,CheckLength));
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}
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#endif
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}
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NewLength = CheckLength + NewSize;
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NewBin->FileOffset = CheckLength;
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//CmKdPrintEx((DPFLTR_CONFIG_ID,DPFLTR_TRACE_LEVEL,"OldLength = %lx;NewLength = %lx (Type = %lx)\n",OldLength,NewLength,(ULONG)Type));
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if( CmpCanGrowSystemHive(Hive,NewLength) == FALSE ) {
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//
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// OOPS! we have reached the hard quota limit on the system hive
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//
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goto ErrorExit2;
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}
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ASSERT((OldLength % HBLOCK_SIZE) == 0);
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ASSERT((CheckLength % HBLOCK_SIZE) == 0);
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ASSERT((NewLength % HBLOCK_SIZE) == 0);
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if (OldLength == 0) {
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//
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// Need to create the first table
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//
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newt = (PVOID)((Hive->Allocate)(sizeof(HMAP_TABLE), FALSE,CM_FIND_LEAK_TAG17));
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if (newt == NULL) {
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goto ErrorExit2;
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}
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RtlZeroMemory(newt, sizeof(HMAP_TABLE));
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Hive->Storage[Type].SmallDir = newt;
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Hive->Storage[Type].Map = (PHMAP_DIRECTORY)&(Hive->Storage[Type].SmallDir);
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}
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if (OldLength > 0) {
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OldMap = (OldLength-1) / HBLOCK_SIZE;
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} else {
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OldMap = 0;
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}
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NewMap = (NewLength-1) / HBLOCK_SIZE;
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OldTable = OldMap / HTABLE_SLOTS;
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NewTable = NewMap / HTABLE_SLOTS;
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#if DBG
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if( Type == Stable ) {
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UNICODE_STRING HiveName;
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RtlInitUnicodeString(&HiveName, (PCWSTR)Hive->BaseBlock->FileName);
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CmKdPrintEx((DPFLTR_CONFIG_ID,CML_BIN_MAP,"HvpAddBin for (%p) (%.*S) Adding new bin %p at FileOffset %lx; Type = %lu\n",Hive,HiveName.Length / sizeof(WCHAR),HiveName.Buffer,NewBin,NewBin->FileOffset,(ULONG)Type));
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}
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#endif
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if (NewTable != OldTable) {
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//
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// Need some new Tables
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//
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if (OldTable == 0) {
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//
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// We can get here even if the real directory has already been created.
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// This can happen if we create the directory then fail on something
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// later. So we need to handle the case where a directory already exists.
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//
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if (Hive->Storage[Type].Map == (PHMAP_DIRECTORY)&Hive->Storage[Type].SmallDir) {
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ASSERT(Hive->Storage[Type].SmallDir != NULL);
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//
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// Need a real directory
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//
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Dir = (Hive->Allocate)(sizeof(HMAP_DIRECTORY), FALSE,CM_FIND_LEAK_TAG18);
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if (Dir == NULL) {
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goto ErrorExit2;
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}
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RtlZeroMemory(Dir, sizeof(HMAP_DIRECTORY));
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Dir->Directory[0] = Hive->Storage[Type].SmallDir;
|
|
Hive->Storage[Type].SmallDir = NULL;
|
|
|
|
Hive->Storage[Type].Map = Dir;
|
|
} else {
|
|
ASSERT(Hive->Storage[Type].SmallDir == NULL);
|
|
}
|
|
|
|
}
|
|
Dir = Hive->Storage[Type].Map;
|
|
|
|
//
|
|
// Fill in directory with new tables
|
|
//
|
|
if (HvpAllocateMap(Hive, Dir, OldTable+1, NewTable) == FALSE) {
|
|
goto ErrorExit3;
|
|
}
|
|
}
|
|
|
|
//
|
|
// If Type == Stable, and the hive is not marked WholeHiveVolatile,
|
|
// grow the file, the log, and the DirtyVector
|
|
//
|
|
if( !NT_SUCCESS(HvpAdjustHiveFreeDisplay(Hive,NewLength,Type)) ) {
|
|
goto ErrorExit3;
|
|
}
|
|
|
|
Hive->Storage[Type].Length = NewLength;
|
|
if ((Type == Stable) && (!(Hive->HiveFlags & HIVE_VOLATILE))) {
|
|
|
|
//
|
|
// Grow the dirtyvector
|
|
//
|
|
NewVector = (PULONG)(Hive->Allocate)(ROUND_UP(NewMap+1,sizeof(ULONG)), TRUE,CM_FIND_LEAK_TAG19);
|
|
if (NewVector == NULL) {
|
|
goto ErrorExit3;
|
|
}
|
|
|
|
RtlZeroMemory(NewVector, NewMap+1);
|
|
|
|
if (Hive->DirtyVector.Buffer != NULL) {
|
|
|
|
RtlCopyMemory(
|
|
(PVOID)NewVector,
|
|
(PVOID)Hive->DirtyVector.Buffer,
|
|
OldMap+1
|
|
);
|
|
(Hive->Free)(Hive->DirtyVector.Buffer, Hive->DirtyAlloc);
|
|
}
|
|
|
|
RtlInitializeBitMap(
|
|
&(Hive->DirtyVector),
|
|
NewVector,
|
|
NewLength / HSECTOR_SIZE
|
|
);
|
|
Hive->DirtyAlloc = ROUND_UP(NewMap+1,sizeof(ULONG));
|
|
|
|
//
|
|
// Grow the log
|
|
//
|
|
if ( ! (HvpGrowLog2(Hive, NewSize))) {
|
|
goto ErrorExit4;
|
|
}
|
|
|
|
//
|
|
// Grow the primary
|
|
//
|
|
if ( ! (Hive->FileSetSize)(
|
|
Hive,
|
|
HFILE_TYPE_PRIMARY,
|
|
NewLength+HBLOCK_SIZE,
|
|
OldLength+HBLOCK_SIZE
|
|
) )
|
|
{
|
|
goto ErrorExit4;
|
|
}
|
|
|
|
//
|
|
// Mark new bin dirty so all control structures get written at next sync
|
|
//
|
|
ASSERT( ((NewLength - OldLength) % HBLOCK_SIZE) == 0 );
|
|
if ( ! HvMarkDirty(Hive, OldLength,NewLength - OldLength,FALSE)) {
|
|
//
|
|
// we have grown the hive, so the new bins are in paged pool !!!
|
|
//
|
|
goto ErrorExit4;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Add the remaining to the free bin list
|
|
//
|
|
if( CheckLength != OldLength ) {
|
|
//
|
|
// Allocate the bin from pagedpool (first flush will update the file image and free the memory)
|
|
//
|
|
RemainingBin = (Hive->Allocate)(CheckLength - OldLength, UseForIo,CM_FIND_LEAK_TAG20);
|
|
if (RemainingBin == NULL) {
|
|
goto ErrorExit4;
|
|
}
|
|
RemainingBin->Signature = HBIN_SIGNATURE;
|
|
RemainingBin->Size = CheckLength - OldLength;
|
|
RemainingBin->FileOffset = OldLength;
|
|
RemainingBin->Spare = 0;
|
|
|
|
t = (PHCELL)((PUCHAR)RemainingBin + sizeof(HBIN));
|
|
t->Size = RemainingBin->Size - sizeof(HBIN);
|
|
if (USE_OLD_CELL(Hive)) {
|
|
t->u.OldCell.Last = (ULONG)HBIN_NIL;
|
|
}
|
|
|
|
//
|
|
// add the free bin to the free bin list and update the map.
|
|
//
|
|
FreeBin = (Hive->Allocate)(sizeof(FREE_HBIN), FALSE,CM_FIND_LEAK_TAG21);
|
|
if (FreeBin == NULL) {
|
|
goto ErrorExit5;
|
|
}
|
|
|
|
FreeBin->Size = CheckLength - OldLength;
|
|
FreeBin->FileOffset = OldLength;
|
|
FreeBin->Flags = FREE_HBIN_DISCARDABLE;
|
|
|
|
InsertHeadList(&Hive->Storage[Type].FreeBins, &FreeBin->ListEntry);
|
|
|
|
#ifdef HV_TRACK_FREE_SPACE
|
|
Hive->Storage[Type].FreeStorage += (FreeBin->Size - sizeof(HBIN));
|
|
ASSERT( Hive->Storage[Type].FreeStorage <= Hive->Storage[Type].Length );
|
|
#endif
|
|
|
|
ASSERT_LISTENTRY(&FreeBin->ListEntry);
|
|
ASSERT_LISTENTRY(FreeBin->ListEntry.Flink);
|
|
|
|
for (i = OldLength; i < CheckLength; i += HBLOCK_SIZE) {
|
|
Me = HvpGetCellMap(Hive, i + (Type*HCELL_TYPE_MASK));
|
|
VALIDATE_CELL_MAP(__LINE__,Me,Hive,i + (Type*HCELL_TYPE_MASK));
|
|
|
|
Me->BinAddress = (ULONG_PTR)RemainingBin | HMAP_DISCARDABLE | HMAP_INPAGEDPOOL;
|
|
if( i == OldLength ) {
|
|
Me->BinAddress |= HMAP_NEWALLOC;
|
|
Me->MemAlloc = CheckLength - OldLength;
|
|
} else {
|
|
Me->MemAlloc = 0;
|
|
}
|
|
Me->BlockAddress = (ULONG_PTR)FreeBin;
|
|
|
|
// we don't need to set it to NULL - just for debug purposes
|
|
ASSERT( (Me->CmView = NULL) == NULL );
|
|
}
|
|
|
|
#if DBG
|
|
{
|
|
if( Type == Stable ) {
|
|
UNICODE_STRING HiveName;
|
|
RtlInitUnicodeString(&HiveName, (PCWSTR)Hive->BaseBlock->FileName);
|
|
CmKdPrintEx((DPFLTR_CONFIG_ID,CML_BIN_MAP,"HvpAddBin for (%p) (%.*S) adding bin starting at %lx size %lx to FreeBinList\n",Hive,HiveName.Length / sizeof(WCHAR),HiveName.Buffer,FreeBin->FileOffset,FreeBin->Size));
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
//
|
|
// Fill in the map, mark new allocation.
|
|
//
|
|
j = 0;
|
|
for (i = CheckLength; i < NewLength; i += HBLOCK_SIZE) {
|
|
Me = HvpGetCellMap(Hive, i + (Type*HCELL_TYPE_MASK));
|
|
VALIDATE_CELL_MAP(__LINE__,Me,Hive,i + (Type*HCELL_TYPE_MASK));
|
|
Me->BlockAddress = (ULONG_PTR)NewBin + j;
|
|
Me->BinAddress = (ULONG_PTR)NewBin;
|
|
Me->BinAddress |= HMAP_INPAGEDPOOL;
|
|
// we don't need to set it to NULL - just for debug purposes
|
|
ASSERT( (Me->CmView = NULL) == NULL );
|
|
|
|
if (j == 0) {
|
|
//
|
|
// First block of allocation, mark it.
|
|
//
|
|
Me->BinAddress |= HMAP_NEWALLOC;
|
|
Me->MemAlloc = NewSize;
|
|
} else {
|
|
Me->MemAlloc = 0;
|
|
}
|
|
j += HBLOCK_SIZE;
|
|
}
|
|
|
|
if( Type == Stable) {
|
|
CmpUpdateSystemHiveHysteresis(Hive,NewLength,OldLength);
|
|
}
|
|
return NewBin;
|
|
|
|
ErrorExit5:
|
|
if( RemainingBin != NULL ){
|
|
(Hive->Free)(RemainingBin, RemainingBin->Size);
|
|
}
|
|
ErrorExit4:
|
|
if((Type == Stable) && (!(Hive->HiveFlags & HIVE_VOLATILE))) {
|
|
RtlInitializeBitMap(&Hive->DirtyVector,
|
|
NewVector,
|
|
OldLength / HSECTOR_SIZE);
|
|
Hive->DirtyCount = RtlNumberOfSetBits(&Hive->DirtyVector);
|
|
}
|
|
ErrorExit3:
|
|
Hive->Storage[Type].Length = OldLength;
|
|
HvpFreeMap(Hive, Dir, OldTable+1, NewTable);
|
|
|
|
ErrorExit2:
|
|
(Hive->Free)(NewBin, NewSize);
|
|
if( newt != NULL ) {
|
|
(Hive->Free)(newt,sizeof(HMAP_TABLE));
|
|
}
|
|
|
|
ErrorExit1:
|
|
return NULL;
|
|
}
|
|
|
|
// Dragos: Modified functions
|
|
BOOLEAN
|
|
HvpCoalesceDiscardedBins(
|
|
IN PHHIVE Hive,
|
|
IN ULONG NeededSize,
|
|
IN HSTORAGE_TYPE Type
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Walks through the list of discarded bins and attempts to
|
|
coalesce adjacent discarded bins into one larger bin in
|
|
order to satisfy an allocation request.
|
|
|
|
It doesn't coalesce bins over the CM_VIEW_SIZE boundary.
|
|
|
|
It doesn't coalesce bins from paged pool with bins mapped in
|
|
system cache views.
|
|
|
|
Arguments:
|
|
|
|
Hive - Supplies pointer to hive control block.
|
|
|
|
NeededSize - Supplies size of allocation needed.
|
|
|
|
Type - Stable or Volatile
|
|
|
|
Return Value:
|
|
|
|
TRUE - A bin of the desired size was created.
|
|
|
|
FALSE - No bin of the desired size could be created.
|
|
|
|
--*/
|
|
|
|
{
|
|
PLIST_ENTRY List;
|
|
PFREE_HBIN FreeBin;
|
|
PFREE_HBIN PreviousFreeBin;
|
|
PFREE_HBIN NextFreeBin;
|
|
PHMAP_ENTRY Map;
|
|
PHMAP_ENTRY PreviousMap;
|
|
PHMAP_ENTRY NextMap;
|
|
ULONG MapBlock;
|
|
|
|
List = Hive->Storage[Type].FreeBins.Flink;
|
|
|
|
while (List != &Hive->Storage[Type].FreeBins) {
|
|
FreeBin = CONTAINING_RECORD(List, FREE_HBIN, ListEntry);
|
|
|
|
if ((FreeBin->Flags & FREE_HBIN_DISCARDABLE)==0) {
|
|
|
|
Map = HvpGetCellMap(Hive, FreeBin->FileOffset);
|
|
VALIDATE_CELL_MAP(__LINE__,Map,Hive,FreeBin->FileOffset);
|
|
|
|
//
|
|
// Scan backwards, coalescing previous discarded bins
|
|
//
|
|
while (FreeBin->FileOffset > 0) {
|
|
PreviousMap = HvpGetCellMap(Hive, FreeBin->FileOffset - HBLOCK_SIZE);
|
|
VALIDATE_CELL_MAP(__LINE__,PreviousMap,Hive,FreeBin->FileOffset - HBLOCK_SIZE);
|
|
if( (BIN_MAP_ALLOCATION_TYPE(Map) != BIN_MAP_ALLOCATION_TYPE(PreviousMap)) || // different allocation type
|
|
((PreviousMap->BinAddress & HMAP_DISCARDABLE) == 0) // previous bin is not discardable
|
|
){
|
|
break;
|
|
}
|
|
|
|
PreviousFreeBin = (PFREE_HBIN)PreviousMap->BlockAddress;
|
|
|
|
if (PreviousFreeBin->Flags & FREE_HBIN_DISCARDABLE) {
|
|
//
|
|
// this bin has not yet been discarded; can't coalesce with it.
|
|
//
|
|
break;
|
|
}
|
|
|
|
if( HvpCheckViewBoundary(PreviousFreeBin->FileOffset,FreeBin->Size + PreviousFreeBin->Size - 1) == FALSE ) {
|
|
//
|
|
// don't coalesce bins over the CM_VIEW_SIZE boundary
|
|
//
|
|
// substract 1 because addresses are from 0 to size - 1 !!!
|
|
//
|
|
break;
|
|
}
|
|
|
|
|
|
RemoveEntryList(&PreviousFreeBin->ListEntry);
|
|
|
|
//
|
|
// Fill in all the old map entries with the new one.
|
|
//
|
|
for (MapBlock = 0; MapBlock < PreviousFreeBin->Size; MapBlock += HBLOCK_SIZE) {
|
|
PreviousMap = HvpGetCellMap(Hive, PreviousFreeBin->FileOffset + MapBlock);
|
|
VALIDATE_CELL_MAP(__LINE__,PreviousMap,Hive,PreviousFreeBin->FileOffset + MapBlock);
|
|
PreviousMap->BlockAddress = (ULONG_PTR)FreeBin;
|
|
}
|
|
|
|
FreeBin->FileOffset = PreviousFreeBin->FileOffset;
|
|
FreeBin->Size += PreviousFreeBin->Size;
|
|
(Hive->Free)(PreviousFreeBin, sizeof(FREE_HBIN));
|
|
}
|
|
|
|
//
|
|
// Scan forwards, coalescing subsequent discarded bins
|
|
//
|
|
while ((FreeBin->FileOffset + FreeBin->Size) < Hive->Storage[Type].Length) {
|
|
NextMap = HvpGetCellMap(Hive, FreeBin->FileOffset + FreeBin->Size);
|
|
VALIDATE_CELL_MAP(__LINE__,NextMap,Hive,FreeBin->FileOffset + FreeBin->Size);
|
|
if( (BIN_MAP_ALLOCATION_TYPE(Map) != BIN_MAP_ALLOCATION_TYPE(NextMap)) || // different allocation type
|
|
((NextMap->BinAddress & HMAP_DISCARDABLE) == 0) // previous bin is not discardable
|
|
){
|
|
break;
|
|
}
|
|
NextFreeBin = (PFREE_HBIN)NextMap->BlockAddress;
|
|
|
|
if (NextFreeBin->Flags & FREE_HBIN_DISCARDABLE) {
|
|
//
|
|
// this bin has not yet been discarded; can't coalesce with it.
|
|
//
|
|
break;
|
|
}
|
|
|
|
if( HvpCheckViewBoundary(FreeBin->FileOffset,FreeBin->Size + NextFreeBin->Size - 1) == FALSE ) {
|
|
//
|
|
// don't coalesce bins over the CM_VIEW_SIZE boundary
|
|
//
|
|
// substract 1 because addresses are from 0 to size - 1 !!!
|
|
//
|
|
break;
|
|
}
|
|
RemoveEntryList(&NextFreeBin->ListEntry);
|
|
|
|
//
|
|
// Fill in all the old map entries with the new one.
|
|
//
|
|
for (MapBlock = 0; MapBlock < NextFreeBin->Size; MapBlock += HBLOCK_SIZE) {
|
|
NextMap = HvpGetCellMap(Hive, NextFreeBin->FileOffset + MapBlock);
|
|
VALIDATE_CELL_MAP(__LINE__,NextMap,Hive,NextFreeBin->FileOffset + MapBlock);
|
|
NextMap->BlockAddress = (ULONG_PTR)FreeBin;
|
|
}
|
|
|
|
FreeBin->Size += NextFreeBin->Size;
|
|
(Hive->Free)(NextFreeBin, sizeof(FREE_HBIN));
|
|
}
|
|
if (FreeBin->Size >= NeededSize) {
|
|
return(TRUE);
|
|
}
|
|
}
|
|
List=List->Flink;
|
|
}
|
|
return(FALSE);
|
|
}
|