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tst: passthrough file system: WIP

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This commit is contained in:
Bill Zissimopoulos 2017-01-20 12:03:06 -08:00
parent 8cb76783ad
commit 2809f56217
1 changed files with 90 additions and 3 deletions
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93
tst/passthrough/passthrough.c
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@ -353,13 +353,92 @@ static NTSTATUS SetFileSize(FSP_FILE_SYSTEM *FileSystem,
PVOID FileContext, UINT64 NewSize, BOOLEAN SetAllocationSize,
FSP_FSCTL_FILE_INFO *FileInfo)
{
return STATUS_INVALID_DEVICE_REQUEST;
HANDLE Handle = FileContext;
FILE_ALLOCATION_INFO AllocationInfo;
FILE_END_OF_FILE_INFO EndOfFileInfo;
if (SetAllocationSize)
{
/*
* This file system does not maintain AllocationSize, although NTFS clearly can.
* However it must always be FileSize <= AllocationSize and NTFS will make sure
* to truncate the FileSize if it sees an AllocationSize < FileSize.
*
* If OTOH a very large AllocationSize is passed, the call below will increase
* the AllocationSize of the underlying file, although our file system does not
* expose this fact. This AllocationSize is only temporary as NTFS will reset
* the AllocationSize of the underlying file when it is closed.
*/
AllocationInfo.AllocationSize.QuadPart = NewSize;
if (!SetFileInformationByHandle(Handle,
FileAllocationInfo, &AllocationInfo, sizeof AllocationInfo))
return FspNtStatusFromWin32(GetLastError());
}
else
{
EndOfFileInfo.EndOfFile.QuadPart = NewSize;
if (!SetFileInformationByHandle(Handle,
FileEndOfFileInfo, &EndOfFileInfo, sizeof EndOfFileInfo))
return FspNtStatusFromWin32(GetLastError());
}
return GetFileInfoInternal(Handle, FileInfo);
}
static NTSTATUS CanDelete(FSP_FILE_SYSTEM *FileSystem,
PVOID FileContext, PWSTR FileName)
{
return STATUS_INVALID_DEVICE_REQUEST;
PTFS *Ptfs = (PTFS *)FileSystem->UserContext;
HANDLE Handle = FileContext;
WCHAR FullPath[FULLPATH_SIZE];
ULONG Length;
FILE_ATTRIBUTE_TAG_INFO AttributeTagInfo;
HANDLE FindHandle;
WIN32_FIND_DATAW FindData;
BOOL HasChild;
if (!GetFileInformationByHandleEx(Handle,
FileAttributeTagInfo, &AttributeTagInfo, sizeof AttributeTagInfo))
return FspNtStatusFromWin32(GetLastError());
if (0 == (AttributeTagInfo.FileAttributes & FILE_ATTRIBUTE_DIRECTORY))
return STATUS_SUCCESS;
if (!ConcatPath(Ptfs, FileName, FullPath))
return STATUS_OBJECT_NAME_INVALID;
Length = (ULONG)wcslen(FullPath);
if (Length + 1 + 1 >= FULLPATH_SIZE)
return STATUS_OBJECT_NAME_INVALID;
if (L'\\' != FullPath[Length - 1])
FullPath[Length++] = L'\\';
FullPath[Length] = L'*';
FullPath[Length + 1] = L'\0';
FindHandle = FindFirstFileW(FullPath, &FindData);
if (INVALID_HANDLE_VALUE == FindHandle)
return FspNtStatusFromWin32(GetLastError());
HasChild = FALSE;
do
{
if (L'.' == FindData.cFileName[0] && (L'\0' == FindData.cFileName[1] ||
(L'.' == FindData.cFileName[1] && L'\0' == FindData.cFileName[2])))
;
else
{
HasChild = TRUE;
break;
}
} while (FindNextFileW(FindHandle, &FindData));
FindClose(FindHandle);
return HasChild ? STATUS_DIRECTORY_NOT_EMPTY : STATUS_SUCCESS;
}
static NTSTATUS Rename(FSP_FILE_SYSTEM *FileSystem,
@ -393,7 +472,12 @@ static NTSTATUS SetSecurity(FSP_FILE_SYSTEM *FileSystem,
PVOID FileContext,
SECURITY_INFORMATION SecurityInformation, PSECURITY_DESCRIPTOR ModificationDescriptor)
{
return STATUS_INVALID_DEVICE_REQUEST;
HANDLE Handle = FileContext;
if (!SetKernelObjectSecurity(Handle, SecurityInformation, ModificationDescriptor))
return FspNtStatusFromWin32(GetLastError());
return STATUS_SUCCESS;
}
static NTSTATUS ReadDirectory(FSP_FILE_SYSTEM *FileSystem,
@ -433,6 +517,7 @@ static NTSTATUS ReadDirectory(FSP_FILE_SYSTEM *FileSystem,
FindHandle = FindFirstFileW(FullPath, &FindData);
if (INVALID_HANDLE_VALUE == FindHandle)
return FspNtStatusFromWin32(GetLastError());
for (;;)
{
/*
@ -489,6 +574,8 @@ static NTSTATUS ReadDirectory(FSP_FILE_SYSTEM *FileSystem,
}
}
FindClose(FindHandle);
return STATUS_SUCCESS;
}