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tst: passthrough file system: WIP

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This commit is contained in:
Bill Zissimopoulos 2017-01-19 22:44:31 -08:00
parent 3bbff30f14
commit f8e4c1bbc4
1 changed files with 116 additions and 5 deletions
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121
tst/passthrough/passthrough.c
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@ -16,8 +16,11 @@
*/
#include <winfsp/winfsp.h>
#include <strsafe.h>
#define PROGNAME "passthrough"
#define ALLOCATION_UNIT 4096
#define FULLPATH_LENGTH (MAX_PATH + FSP_FSCTL_TRANSACT_PATH_SIZEMAX / sizeof(WCHAR))
#define info(format, ...) FspServiceLog(EVENTLOG_INFORMATION_TYPE, format, __VA_ARGS__)
#define warn(format, ...) FspServiceLog(EVENTLOG_WARNING_TYPE, format, __VA_ARGS__)
@ -29,10 +32,49 @@ typedef struct
PWSTR Path;
} PTFS;
#define ConcatPath(Ptfs, FN, FP) (0 == StringCbPrintfW(FP, sizeof FP, L"%s%s", Ptfs->Path, FN))
static NTSTATUS GetFileInfoInternal(HANDLE Handle, FSP_FSCTL_FILE_INFO *FileInfo)
{
BY_HANDLE_FILE_INFORMATION ByHandleFileInfo;
if (!GetFileInformationByHandle(Handle, &ByHandleFileInfo))
return FspNtStatusFromWin32(GetLastError());
FileInfo->FileAttributes = ByHandleFileInfo.dwFileAttributes;
FileInfo->ReparseTag = 0;
FileInfo->FileSize =
((UINT64)ByHandleFileInfo.nFileSizeHigh << 32) | (UINT64)ByHandleFileInfo.nFileSizeLow;
FileInfo->AllocationSize = (FileInfo->FileSize + ALLOCATION_UNIT - 1)
/ ALLOCATION_UNIT * ALLOCATION_UNIT;
FileInfo->CreationTime = ((PLARGE_INTEGER)&ByHandleFileInfo.ftCreationTime)->QuadPart;
FileInfo->LastAccessTime = ((PLARGE_INTEGER)&ByHandleFileInfo.ftLastAccessTime)->QuadPart;
FileInfo->LastWriteTime = ((PLARGE_INTEGER)&ByHandleFileInfo.ftLastWriteTime)->QuadPart;
FileInfo->ChangeTime = FileInfo->LastWriteTime;
FileInfo->IndexNumber =
((UINT64)ByHandleFileInfo.nFileIndexHigh << 32) | (UINT64)ByHandleFileInfo.nFileIndexLow;
FileInfo->HardLinks = 0;
return STATUS_SUCCESS;
}
static NTSTATUS GetVolumeInfo(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_VOLUME_INFO *VolumeInfo)
{
return STATUS_INVALID_DEVICE_REQUEST;
PTFS *Ptfs = (PTFS *)FileSystem->UserContext;
WCHAR Root[MAX_PATH];
ULARGE_INTEGER TotalSize, FreeSize;
if (!GetVolumePathName(Ptfs->Path, Root, MAX_PATH))
return FspNtStatusFromWin32(GetLastError());
if (!GetDiskFreeSpaceEx(Root, 0, &TotalSize, &FreeSize))
return FspNtStatusFromWin32(GetLastError());
VolumeInfo->TotalSize = TotalSize.QuadPart;
VolumeInfo->FreeSize = FreeSize.QuadPart;
return STATUS_SUCCESS;
}
static NTSTATUS SetVolumeLabel_(FSP_FILE_SYSTEM *FileSystem,
@ -46,7 +88,57 @@ static NTSTATUS GetSecurityByName(FSP_FILE_SYSTEM *FileSystem,
PWSTR FileName, PUINT32 PFileAttributes,
PSECURITY_DESCRIPTOR SecurityDescriptor, SIZE_T *PSecurityDescriptorSize)
{
return STATUS_INVALID_DEVICE_REQUEST;
PTFS *Ptfs = (PTFS *)FileSystem->UserContext;
WCHAR FullPath[FULLPATH_LENGTH];
HANDLE Handle;
FILE_ATTRIBUTE_TAG_INFO AttributeTagInfo;
DWORD SecurityDescriptorSizeNeeded;
NTSTATUS Result;
if (!ConcatPath(Ptfs, FileName, FullPath))
return STATUS_OBJECT_NAME_INVALID;
Handle = CreateFileW(FullPath,
FILE_READ_ATTRIBUTES | READ_CONTROL, 0, 0,
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
if (INVALID_HANDLE_VALUE == Handle)
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
if (0 != PFileAttributes)
{
if (!GetFileInformationByHandleEx(Handle,
FileAttributeTagInfo, &AttributeTagInfo, sizeof AttributeTagInfo))
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
*PFileAttributes = AttributeTagInfo.FileAttributes;
}
if (0 != PSecurityDescriptorSize)
{
if (!GetKernelObjectSecurity(Handle,
OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,
SecurityDescriptor, (DWORD)*PSecurityDescriptorSize, &SecurityDescriptorSizeNeeded))
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
*PSecurityDescriptorSize = SecurityDescriptorSizeNeeded;
}
Result = STATUS_SUCCESS;
exit:
if (INVALID_HANDLE_VALUE != Handle)
CloseHandle(Handle);
return Result;
}
static NTSTATUS Create(FSP_FILE_SYSTEM *FileSystem,
@ -61,7 +153,20 @@ static NTSTATUS Open(FSP_FILE_SYSTEM *FileSystem,
PWSTR FileName, UINT32 CreateOptions, UINT32 GrantedAccess,
PVOID *PFileContext, FSP_FSCTL_FILE_INFO *FileInfo)
{
return STATUS_INVALID_DEVICE_REQUEST;
PTFS *Ptfs = (PTFS *)FileSystem->UserContext;
WCHAR FullPath[FULLPATH_LENGTH];
HANDLE Handle;
if (!ConcatPath(Ptfs, FileName, FullPath))
return STATUS_OBJECT_NAME_INVALID;
Handle = CreateFileW(FullPath,
GrantedAccess, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0,
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
if (INVALID_HANDLE_VALUE == Handle)
return FspNtStatusFromWin32(GetLastError());
return GetFileInfoInternal(Handle, FileInfo);
}
static NTSTATUS Overwrite(FSP_FILE_SYSTEM *FileSystem,
@ -79,6 +184,9 @@ static VOID Cleanup(FSP_FILE_SYSTEM *FileSystem,
static VOID Close(FSP_FILE_SYSTEM *FileSystem,
PVOID FileContext)
{
HANDLE Handle = FileContext;
CloseHandle(Handle);
}
static NTSTATUS Read(FSP_FILE_SYSTEM *FileSystem,
@ -201,6 +309,9 @@ static NTSTATUS PtfsCreate(PWSTR Path, PWSTR VolumePrefix, PWSTR MountPoint, UIN
if (!GetFullPathNameW(Path, MAX_PATH, FullPath, 0))
return FspNtStatusFromWin32(GetLastError());
Length = (ULONG)wcslen(FullPath);
if (0 < Length && L'\\' == FullPath[Length - 1])
FullPath[--Length] = L'\0';
Handle = CreateFileW(
FullPath, FILE_READ_ATTRIBUTES, 0, 0,
@ -222,7 +333,7 @@ static NTSTATUS PtfsCreate(PWSTR Path, PWSTR VolumePrefix, PWSTR MountPoint, UIN
}
memset(Ptfs, 0, sizeof *Ptfs);
Length = (ULONG)(wcslen(FullPath) + 1) * sizeof(WCHAR);
Length = (Length + 1) * sizeof(WCHAR);
Ptfs->Path = malloc(Length);
if (0 == Ptfs->Path)
{
@ -232,7 +343,7 @@ static NTSTATUS PtfsCreate(PWSTR Path, PWSTR VolumePrefix, PWSTR MountPoint, UIN
memcpy(Ptfs->Path, FullPath, Length);
memset(&VolumeParams, 0, sizeof VolumeParams);
VolumeParams.SectorSize = 4096;
VolumeParams.SectorSize = ALLOCATION_UNIT;
VolumeParams.SectorsPerAllocationUnit = 1;
VolumeParams.VolumeCreationTime = ((PLARGE_INTEGER)&CreationTime)->QuadPart;
VolumeParams.VolumeSerialNumber = 0;