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