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[NTOSKRNL] Rename PagingFileList to MmPagingFile and make insertion simpler

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This commit is contained in:
Pierre Schweitzer 2018-08-11 23:19:58 +02:00
parent 47cd447cfa
commit f106c297de
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GPG key ID: 7545556C3D585B0B
1 changed files with 21 additions and 26 deletions
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47
ntoskrnl/mm/pagefile.c
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@ -58,7 +58,7 @@ PAGINGFILE, *PPAGINGFILE;
#define MAX_PAGING_FILES (16)
/* List of paging files, both used and free */
static PPAGINGFILE PagingFileList[MAX_PAGING_FILES];
static PPAGINGFILE MmPagingFile[MAX_PAGING_FILES];
/* Lock for examining the list of paging files */
static KSPIN_LOCK PagingFileListLock;
@ -129,7 +129,7 @@ MmIsFileObjectAPagingFile(PFILE_OBJECT FileObject)
for (i = 0; i < MmNumberOfPagingFiles; i++)
{
/* Check if this is one of them */
if (PagingFileList[i]->FileObject == FileObject) return TRUE;
if (MmPagingFile[i]->FileObject == FileObject) return TRUE;
}
/* Nothing found */
@ -171,8 +171,8 @@ MmWriteToSwapPage(SWAPENTRY SwapEntry, PFN_NUMBER Page)
i = FILE_FROM_ENTRY(SwapEntry);
offset = OFFSET_FROM_ENTRY(SwapEntry) - 1;
if (PagingFileList[i]->FileObject == NULL ||
PagingFileList[i]->FileObject->DeviceObject == NULL)
if (MmPagingFile[i]->FileObject == NULL ||
MmPagingFile[i]->FileObject->DeviceObject == NULL)
{
DPRINT1("Bad paging file 0x%.8X\n", SwapEntry);
KeBugCheck(MEMORY_MANAGEMENT);
@ -185,7 +185,7 @@ MmWriteToSwapPage(SWAPENTRY SwapEntry, PFN_NUMBER Page)
file_offset.QuadPart = offset * PAGE_SIZE;
KeInitializeEvent(&Event, NotificationEvent, FALSE);
Status = IoSynchronousPageWrite(PagingFileList[i]->FileObject,
Status = IoSynchronousPageWrite(MmPagingFile[i]->FileObject,
Mdl,
&file_offset,
&Event,
@ -236,7 +236,7 @@ MiReadPageFile(
ASSERT(PageFileIndex < MAX_PAGING_FILES);
PagingFile = PagingFileList[PageFileIndex];
PagingFile = MmPagingFile[PageFileIndex];
if (PagingFile->FileObject == NULL || PagingFile->FileObject->DeviceObject == NULL)
{
@ -283,7 +283,7 @@ MmInitPagingFile(VOID)
for (i = 0; i < MAX_PAGING_FILES; i++)
{
PagingFileList[i] = NULL;
MmPagingFile[i] = NULL;
}
MmNumberOfPagingFiles = 0;
}
@ -308,26 +308,29 @@ MmFreeSwapPage(SWAPENTRY Entry)
ULONG i;
ULONG_PTR off;
KIRQL oldIrql;
PPAGINGFILE PagingFile;
i = FILE_FROM_ENTRY(Entry);
off = OFFSET_FROM_ENTRY(Entry) - 1;
KeAcquireSpinLock(&PagingFileListLock, &oldIrql);
if (PagingFileList[i] == NULL)
PagingFile = MmPagingFile[i];
if (PagingFile == NULL)
{
KeBugCheck(MEMORY_MANAGEMENT);
}
KeAcquireSpinLockAtDpcLevel(&PagingFileList[i]->AllocMapLock);
KeAcquireSpinLockAtDpcLevel(&PagingFile->AllocMapLock);
RtlClearBit(PagingFileList[i]->AllocMap, off >> 5);
RtlClearBit(PagingFile->AllocMap, off >> 5);
PagingFileList[i]->FreePages++;
PagingFileList[i]->UsedPages--;
PagingFile->FreePages++;
PagingFile->UsedPages--;
MiFreeSwapPages++;
MiUsedSwapPages--;
KeReleaseSpinLockFromDpcLevel(&PagingFileList[i]->AllocMapLock);
KeReleaseSpinLockFromDpcLevel(&PagingFile->AllocMapLock);
KeReleaseSpinLock(&PagingFileListLock, oldIrql);
}
@ -350,10 +353,10 @@ MmAllocSwapPage(VOID)
for (i = 0; i < MAX_PAGING_FILES; i++)
{
if (PagingFileList[i] != NULL &&
PagingFileList[i]->FreePages >= 1)
if (MmPagingFile[i] != NULL &&
MmPagingFile[i]->FreePages >= 1)
{
off = MiAllocPageFromPagingFile(PagingFileList[i]);
off = MiAllocPageFromPagingFile(MmPagingFile[i]);
if (off == 0xFFFFFFFF)
{
KeBugCheck(MEMORY_MANAGEMENT);
@ -388,7 +391,6 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
PPAGINGFILE PagingFile;
KIRQL oldIrql;
ULONG AllocMapSize;
ULONG i;
ULONG Count;
KPROCESSOR_MODE PreviousMode;
UNICODE_STRING CapturedFileName;
@ -660,16 +662,9 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
RtlClearAllBits(PagingFile->AllocMap);
KeAcquireSpinLock(&PagingFileListLock, &oldIrql);
for (i = 0; i < MAX_PAGING_FILES; i++)
{
if (PagingFileList[i] == NULL)
{
PagingFileList[i] = PagingFile;
break;
}
}
MiFreeSwapPages = MiFreeSwapPages + PagingFile->FreePages;
MmNumberOfPagingFiles++;
MmPagingFile[MmNumberOfPagingFiles] = PagingFile;
MiFreeSwapPages = MiFreeSwapPages + PagingFile->FreePages;
KeReleaseSpinLock(&PagingFileListLock, oldIrql);
MmSwapSpaceMessage = FALSE;