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sys: FspFsvolDeviceLookupDescendantContextByName

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This commit is contained in:
Bill Zissimopoulos 2016-02-13 17:30:30 -08:00
parent 73bd8906fc
commit a8c0bbcf85
3 changed files with 21 additions and 35 deletions
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33
src/sys/device.c
View File

@ -41,7 +41,8 @@ static RTL_AVL_COMPARE_ROUTINE FspFsvolDeviceCompareContext;
static RTL_AVL_ALLOCATE_ROUTINE FspFsvolDeviceAllocateContext;
static RTL_AVL_FREE_ROUTINE FspFsvolDeviceFreeContext;
PVOID FspFsvolDeviceLookupContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName);
PVOID FspFsvolDeviceLookupChildContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName);
PVOID FspFsvolDeviceLookupDescendantContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName,
BOOLEAN ChildOnly);
PVOID FspFsvolDeviceInsertContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName, PVOID Context,
FSP_DEVICE_CONTEXT_BY_NAME_TABLE_ELEMENT *ElementStorage, PBOOLEAN PInserted);
VOID FspFsvolDeviceDeleteContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName,
@ -79,7 +80,7 @@ VOID FspDeviceDeleteAll(VOID);
#pragma alloc_text(PAGE, FspFsvolDeviceAllocateContext)
#pragma alloc_text(PAGE, FspFsvolDeviceFreeContext)
#pragma alloc_text(PAGE, FspFsvolDeviceLookupContextByName)
#pragma alloc_text(PAGE, FspFsvolDeviceLookupChildContextByName)
#pragma alloc_text(PAGE, FspFsvolDeviceLookupDescendantContextByName)
#pragma alloc_text(PAGE, FspFsvolDeviceInsertContextByName)
#pragma alloc_text(PAGE, FspFsvolDeviceDeleteContextByName)
#pragma alloc_text(PAGE, FspFsvolDeviceCompareContextByName)
@ -616,31 +617,25 @@ PVOID FspFsvolDeviceLookupContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_ST
return 0 != Result ? Result->Context : 0;
}
PVOID FspFsvolDeviceLookupChildContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName)
PVOID FspFsvolDeviceLookupDescendantContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName,
BOOLEAN ChildOnly)
{
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
BOOLEAN CaseInsensitive = 0 == FsvolDeviceExtension->VolumeParams.CaseSensitiveSearch;
FSP_DEVICE_CONTEXT_BY_NAME_TABLE_ELEMENT_DATA *Result;
PVOID RestartKey;
PVOID RestartKey = 0;
ULONG DeleteCount = 0;
Result = RtlLookupFirstMatchingElementGenericTableAvl(&FsvolDeviceExtension->ContextByNameTable,
&FileName, &RestartKey);
if (0 == Result)
return 0;
Result = RtlEnumerateGenericTableWithoutSplayingAvl(&FsvolDeviceExtension->ContextByNameTable,
&RestartKey);
if (0 == Result)
return 0;
if (RtlPrefixUnicodeString(FileName, Result->FileName, CaseInsensitive) &&
FileName->Length < Result->FileName->Length &&
'\\' == Result->FileName->Buffer[FileName->Length / sizeof(WCHAR)])
return Result->Context;
else
Result = RtlEnumerateGenericTableLikeADirectory(&FsvolDeviceExtension->ContextByNameTable,
0, 0, ChildOnly, &RestartKey, &DeleteCount, &FileName);
if (0 == Result ||
!RtlPrefixUnicodeString(FileName, Result->FileName, CaseInsensitive) ||
(FileName->Length < Result->FileName->Length &&
'\\' != Result->FileName->Buffer[FileName->Length / sizeof(WCHAR)]))
return 0;
return Result->Context;
}
PVOID FspFsvolDeviceInsertContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName, PVOID Context,

3
src/sys/driver.h
View File

@ -515,7 +515,8 @@ PVOID FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier
VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,
PBOOLEAN PDeleted);
PVOID FspFsvolDeviceLookupContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName);
PVOID FspFsvolDeviceLookupChildContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName);
PVOID FspFsvolDeviceLookupDescendantContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName,
BOOLEAN ChildOnly);
PVOID FspFsvolDeviceInsertContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName, PVOID Context,
FSP_DEVICE_CONTEXT_BY_NAME_TABLE_ELEMENT *ElementStorage, PBOOLEAN PInserted);
VOID FspFsvolDeviceDeleteContextByName(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING FileName,

20
src/sys/fileinfo.c
View File

@ -887,21 +887,11 @@ static NTSTATUS FspFsvolSetRenameInformation(
Result = STATUS_SUCCESS;
FspFsvolDeviceLockContextTable(FsvolDeviceObject);
if (FileNode->IsDirectory)
{
if (1 < FileNode->OpenCount ||
0 != FspFsvolDeviceLookupChildContextByName(FsvolDeviceObject, &FileNode->FileName) ||
0 != FspFsvolDeviceLookupContextByName(FsvolDeviceObject, &NewFileName) ||
0 != FspFsvolDeviceLookupChildContextByName(FsvolDeviceObject, &NewFileName))
Result = STATUS_ACCESS_DENIED;
}
else
{
if (1 < FileNode->OpenCount ||
0 != FspFsvolDeviceLookupContextByName(FsvolDeviceObject, &NewFileName) ||
0 != FspFsvolDeviceLookupChildContextByName(FsvolDeviceObject, &NewFileName))
Result = STATUS_ACCESS_DENIED;
}
if (1 < FileNode->OpenCount ||
(FileNode->IsDirectory &&
0 != FspFsvolDeviceLookupDescendantContextByName(FsvolDeviceObject, &FileNode->FileName, TRUE)) ||
0 != FspFsvolDeviceLookupDescendantContextByName(FsvolDeviceObject, &NewFileName, FALSE))
Result = STATUS_ACCESS_DENIED;
FspFsvolDeviceUnlockContextTable(FsvolDeviceObject);
if (!NT_SUCCESS(Result))
return Result;