dll: fsctl.c, ntstatus.c

build/VStudio/winfsp_dll.vcxproj

@@ -164,6 +164,7 @@
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="..\..\src\dll\fsctl.c" />
+    <ClCompile Include="..\..\src\dll\ntstatus.c" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\inc\winfsp\fsctl.h" />

build/VStudio/winfsp_dll.vcxproj.filters

@@ -17,6 +17,9 @@
     <ClCompile Include="..\..\src\dll\fsctl.c">
       <Filter>Source</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\dll\ntstatus.c">
+      <Filter>Source</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\inc\winfsp\fsctl.h">

inc/winfsp/fsctl.h

@@ -29,7 +29,7 @@ extern const __declspec(selectany) GUID FspFsvrtDeviceClassGuid =
 #define FSP_FSCTL_TRANSACT              \
     CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'T', METHOD_BUFFERED, FILE_ANY_ACCESS)
 
-#define FSP_FSCTL_CREATE_BUFFER_SIZE    64
+#define FSP_FSCTL_CREATE_BUFFER_SIZE    128
 #define FSP_FSCTL_TRANSACT_BUFFER_SIZE  4096
 #define FSP_FSCTL_TRANSACT_REQ_SIZEMAX  1536
 
@@ -60,8 +60,10 @@ typedef struct
 #pragma warning(pop)
 
 #if !defined(WINFSP_SYS_DRIVER_H_INTERNAL)
-NTSTATUS FspFsctlCreateVolume(PSECURITY_DESCRIPTOR SecurityDescriptor, PHANDLE *PHandle);
-NTSTATUS FspFsctlOpenVolume(PWSTR VolumeName);
+NTSTATUS FspFsctlCreateVolume(PWSTR DevicePath, PSECURITY_DESCRIPTOR SecurityDescriptor,
+    PHANDLE *PHandle);
+NTSTATUS FspFsctlOpenVolume(PWSTR VolumePath,
+    PHANDLE *PHandle);
 NTSTATUS FspFsctlDeleteVolume(HANDLE Handle);
 NTSTATUS FspFsctlTransact(HANDLE Handle,
     const FSP_TRANSACT_RSP *Responses, size_t NumResponses,

inc/winfsp/winfsp.h

@@ -13,4 +13,6 @@
 #include <winternl.h>
 #include <ntstatus.h>
 
+NTSTATUS FspNtStatusFromWin32(DWORD Error);
+
 #endif

src/dll/fsctl.c

@@ -6,3 +6,99 @@
 
 #include <winfsp/winfsp.h>
 #include <winfsp/fsctl.h>
+#include <strsafe.h>
+
+#define GLOBALROOT                      L"\\\\?\\GLOBALROOT"
+
+NTSTATUS FspFsctlCreateVolume(PWSTR DevicePath, PSECURITY_DESCRIPTOR SecurityDescriptor,
+    PHANDLE *PHandle)
+{
+    NTSTATUS Result = STATUS_SUCCESS;
+    WCHAR DevicePathBuf[(sizeof GLOBALROOT + FSP_FSCTL_CREATE_BUFFER_SIZE) / sizeof(WCHAR)];
+    WCHAR VolumePathBuf[FSP_FSCTL_CREATE_BUFFER_SIZE / sizeof(WCHAR)];
+    PSECURITY_DESCRIPTOR SecurityDescriptorBuf = 0;
+    DWORD SecurityDescriptorLen, Bytes;
+    HANDLE DeviceHandle = INVALID_HANDLE_VALUE;
+
+    *PHandle = 0;
+
+    DevicePathBuf[0] = L'\0';
+    StringCbPrintf(DevicePathBuf, sizeof DevicePathBuf, GLOBALROOT "%S", DevicePath);
+
+    if (!MakeSelfRelativeSD(SecurityDescriptor, 0, &SecurityDescriptorLen))
+    {
+        SecurityDescriptorBuf = malloc(SecurityDescriptorLen);
+        if (0 == SecurityDescriptorBuf)
+        {
+            Result = STATUS_INSUFFICIENT_RESOURCES;
+            goto exit;
+        }
+        if (!MakeSelfRelativeSD(SecurityDescriptor, SecurityDescriptorBuf, &SecurityDescriptorLen))
+        {
+            Result = FspNtStatusFromWin32(GetLastError());
+            goto exit;
+        }
+    }
+
+    DeviceHandle = CreateFileW(DevicePathBuf,
+        0, FILE_SHARE_WRITE | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0, OPEN_EXISTING, 0, 0);
+    if (INVALID_HANDLE_VALUE == DeviceHandle)
+    {
+        Result = FspNtStatusFromWin32(GetLastError());
+        goto exit;
+    }
+
+    if (!DeviceIoControl(DeviceHandle, FSP_FSCTL_CREATE,
+        SecurityDescriptorBuf, SecurityDescriptorLen, VolumePathBuf, sizeof VolumePathBuf,
+        &Bytes, 0))
+    {
+        Result = FspNtStatusFromWin32(GetLastError());
+        goto exit;
+    }
+
+    Result = FspFsctlOpenVolume(VolumePathBuf, PHandle);
+
+exit:
+    if (INVALID_HANDLE_VALUE != DeviceHandle)
+        CloseHandle(DeviceHandle);
+    free(SecurityDescriptorBuf);
+    return Result;
+}
+
+NTSTATUS FspFsctlOpenVolume(PWSTR VolumePath,
+    PHANDLE *PHandle)
+{
+    NTSTATUS Result = STATUS_SUCCESS;
+    WCHAR DevicePathBuf[(sizeof GLOBALROOT + FSP_FSCTL_CREATE_BUFFER_SIZE) / sizeof(WCHAR)];
+    HANDLE DeviceHandle;
+
+    *PHandle = 0;
+
+    DevicePathBuf[0] = L'\0';
+    StringCbPrintf(DevicePathBuf, sizeof DevicePathBuf, GLOBALROOT "%S", VolumePath);
+
+    DeviceHandle = CreateFileW(DevicePathBuf,
+        0, FILE_SHARE_WRITE | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0, OPEN_EXISTING, 0, 0);
+    if (INVALID_HANDLE_VALUE == DeviceHandle)
+    {
+        Result = FspNtStatusFromWin32(GetLastError());
+        goto exit;
+    }
+
+    *PHandle = DeviceHandle;
+
+exit:
+    return Result;
+}
+
+NTSTATUS FspFsctlDeleteVolume(HANDLE Handle)
+{
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS FspFsctlTransact(HANDLE Handle,
+    const FSP_TRANSACT_RSP *Responses, size_t NumResponses,
+    const FSP_TRANSACT_REQ *Requests, size_t *NumRequests)
+{
+    return STATUS_NOT_IMPLEMENTED;
+}

src/dll/ntstatus.c

@@ -0,0 +1,12 @@
+/**
+ * @file dll/ntstatus.c
+ *
+ * @copyright 2015 Bill Zissimopoulos
+ */
+
+#include <winfsp/winfsp.h>
+
+NTSTATUS FspNtStatusFromWin32(DWORD Error)
+{
+    return STATUS_ACCESS_DENIED;
+}