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sys: IRP_MJ_FLUSH_BUFFERS: flush volume implementation

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This commit is contained in:
Bill Zissimopoulos
2016-04-04 14:33:23 -07:00
parent 71c1469b46
commit 83c59a6f37
4 changed files with 173 additions and 37 deletions
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46
src/sys/device.c
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@ -40,6 +40,9 @@ VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,
static RTL_AVL_COMPARE_ROUTINE FspFsvolDeviceCompareContext;
static RTL_AVL_ALLOCATE_ROUTINE FspFsvolDeviceAllocateContext;
static RTL_AVL_FREE_ROUTINE FspFsvolDeviceFreeContext;
NTSTATUS FspFsvolDeviceCopyContextByNameList(PDEVICE_OBJECT DeviceObject,
PVOID **PContexts, PULONG PContextCount);
VOID FspFsvolDeviceDeleteContextByNameList(PVOID *Contexts, ULONG ContextCount);
PVOID FspFsvolDeviceEnumerateContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName,
BOOLEAN SubpathOnly, PVOID *PRestartKey);
PVOID FspFsvolDeviceLookupContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName);
@ -79,6 +82,8 @@ VOID FspDeviceDeleteAll(VOID);
#pragma alloc_text(PAGE, FspFsvolDeviceCompareContext)
#pragma alloc_text(PAGE, FspFsvolDeviceAllocateContext)
#pragma alloc_text(PAGE, FspFsvolDeviceFreeContext)
#pragma alloc_text(PAGE, FspFsvolDeviceCopyContextByNameList)
#pragma alloc_text(PAGE, FspFsvolDeviceDeleteContextByNameList)
#pragma alloc_text(PAGE, FspFsvolDeviceEnumerateContextByName)
#pragma alloc_text(PAGE, FspFsvolDeviceLookupContextByName)
#pragma alloc_text(PAGE, FspFsvolDeviceInsertContextByName)
@ -653,6 +658,45 @@ static VOID NTAPI FspFsvolDeviceFreeContext(
PAGED_CODE();
}
NTSTATUS FspFsvolDeviceCopyContextByNameList(PDEVICE_OBJECT DeviceObject,
PVOID **PContexts, PULONG PContextCount)
{
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
FSP_DEVICE_CONTEXT_BY_NAME_TABLE_ELEMENT_DATA *Data;
PVOID *Contexts;
ULONG ContextCount, Index;
*PContexts = 0;
*PContextCount = 0;
ContextCount = RtlNumberGenericTableElementsAvl(&FsvolDeviceExtension->ContextByNameTable);
Contexts = FspAlloc(sizeof(PVOID) * ContextCount);
if (0 == Contexts)
return STATUS_INSUFFICIENT_RESOURCES;
Index = 0;
Data = RtlEnumerateGenericTableAvl(&FsvolDeviceExtension->ContextByNameTable, TRUE);
while (Index < ContextCount && 0 != Data)
{
Contexts[Index++] = Data->Context;
Data = RtlEnumerateGenericTableAvl(&FsvolDeviceExtension->ContextByNameTable, FALSE);
}
*PContexts = Contexts;
*PContextCount = Index;
return STATUS_SUCCESS;
}
VOID FspFsvolDeviceDeleteContextByNameList(PVOID *Contexts, ULONG ContextCount)
{
PAGED_CODE();
FspFree(Contexts);
}
PVOID FspFsvolDeviceEnumerateContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName,
BOOLEAN SubpathOnly, PVOID *PRestartKey)
{
@ -668,7 +712,7 @@ PVOID FspFsvolDeviceEnumerateContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE
Result = RtlEnumerateGenericTableLikeADirectory(&FsvolDeviceExtension->ContextByNameTable,
0, 0, SubpathOnly, PRestartKey, &DeleteCount, &FileName);
if (0 != Result &&
RtlPrefixUnicodeString(FileName, Result->FileName, CaseInsensitive) &&
FileName->Length < Result->FileName->Length &&