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[NTOSKRNL]

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Refactor CcRosMapVacb a bit

svn path=/trunk/; revision=64584
This commit is contained in:
Timo Kreuzer 2014-10-08 00:30:30 +00:00
parent f82e8687b6
commit 27b5c44ea3
1 changed files with 41 additions and 37 deletions
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78
reactos/ntoskrnl/cc/view.c
View file

@ -579,38 +579,60 @@ CcRosUnmapVacb (
}
static
VOID
CcRosMapVacb(PVOID BaseAddress,
SIZE_T Length,
ULONG Consumer,
ULONG Protection)
NTSTATUS
CcRosMapVacb(
PROS_VACB Vacb)
{
ULONG i;
NTSTATUS Status;
ULONG_PTR NumberOfPages;
ASSERT(((ULONG_PTR)BaseAddress % PAGE_SIZE) == 0);
for (i = 0; i < PAGE_ROUND_UP(Length) / PAGE_SIZE; i++)
/* Create a memory area. */
MmLockAddressSpace(MmGetKernelAddressSpace());
Status = MmCreateMemoryArea(MmGetKernelAddressSpace(),
0, // nothing checks for VACB mareas, so set to 0
&Vacb->BaseAddress,
VACB_MAPPING_GRANULARITY,
PAGE_READWRITE,
(PMEMORY_AREA*)&Vacb->MemoryArea,
FALSE,
0,
PAGE_SIZE);
MmUnlockAddressSpace(MmGetKernelAddressSpace());
if (!NT_SUCCESS(Status))
{
PFN_NUMBER Page;
KeBugCheck(CACHE_MANAGER);
}
Status = MmRequestPageMemoryConsumer(Consumer, TRUE, &Page);
if (!NT_SUCCESS(Status))
ASSERT(((ULONG_PTR)Vacb->BaseAddress % PAGE_SIZE) == 0);
ASSERT((ULONG_PTR)Vacb->BaseAddress > (ULONG_PTR)MmSystemRangeStart);
/* Create a virtual mapping for this memory area */
NumberOfPages = BYTES_TO_PAGES(VACB_MAPPING_GRANULARITY);
for (i = 0; i < NumberOfPages; i++)
{
PFN_NUMBER PageFrameNumber;
Status = MmRequestPageMemoryConsumer(MC_CACHE, TRUE, &PageFrameNumber);
if (PageFrameNumber == 0)
{
DPRINT1("Unable to allocate page\n");
KeBugCheck(MEMORY_MANAGEMENT);
}
Status = MmCreateVirtualMapping (NULL,
(PVOID)((ULONG_PTR)BaseAddress + (i * PAGE_SIZE)),
Protection,
&Page,
1);
Status = MmCreateVirtualMapping(NULL,
(PVOID)((ULONG_PTR)Vacb->BaseAddress + (i * PAGE_SIZE)),
PAGE_READWRITE,
&PageFrameNumber,
1);
if (!NT_SUCCESS(Status))
{
DPRINT1("Unable to create virtual mapping\n");
KeBugCheck(MEMORY_MANAGEMENT);
}
}
return STATUS_SUCCESS;
}
static
@ -637,6 +659,7 @@ CcRosCreateVacb (
}
current = ExAllocateFromNPagedLookasideList(&VacbLookasideList);
current->BaseAddress = NULL;
current->Valid = FALSE;
current->Dirty = FALSE;
current->PageOut = FALSE;
@ -724,24 +747,6 @@ CcRosCreateVacb (
InsertTailList(&VacbLruListHead, &current->VacbLruListEntry);
KeReleaseGuardedMutex(&ViewLock);
MmLockAddressSpace(MmGetKernelAddressSpace());
current->BaseAddress = NULL;
Status = MmCreateMemoryArea(MmGetKernelAddressSpace(),
0, // nothing checks for VACB mareas, so set to 0
&current->BaseAddress,
VACB_MAPPING_GRANULARITY,
PAGE_READWRITE,
(PMEMORY_AREA*)&current->MemoryArea,
FALSE,
0,
PAGE_SIZE);
MmUnlockAddressSpace(MmGetKernelAddressSpace());
if (!NT_SUCCESS(Status))
{
KeBugCheck(CACHE_MANAGER);
}
/* Create a virtual mapping for this memory area */
MI_SET_USAGE(MI_USAGE_CACHE);
#if MI_TRACE_PFNS
if ((SharedCacheMap->FileObject) && (SharedCacheMap->FileObject->FileName.Buffer))
@ -754,10 +759,9 @@ CcRosCreateVacb (
}
#endif
CcRosMapVacb(current->BaseAddress, VACB_MAPPING_GRANULARITY,
MC_CACHE, PAGE_READWRITE);
Status = CcRosMapVacb(current);
return STATUS_SUCCESS;
return Status;
}
NTSTATUS