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inc: fsctl: FSP_FSCTL_VOLUME_PARAMS changes:

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- increase size of VolumePrefix
- add FileSystemName field (currently unused)
This commit is contained in:
Bill Zissimopoulos 2016-09-20 15:37:42 -07:00
parent b7a2b5e17a
commit 817beebb63
4 changed files with 18 additions and 12 deletions
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17
inc/winfsp/fsctl.h
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@ -24,12 +24,17 @@
extern "C" {
#endif
/* static_assert is a C++11 feature, but seems to work with C on MSVC 2015 */
#if defined(WINFSP_SYS_INTERNAL) || defined(WINFSP_DLL_INTERNAL)
#define FSP_FSCTL_STATIC_ASSERT(e,m) static_assert(e,m)
#else
#define FSP_FSCTL_STATIC_ASSERT(e,m)
#endif
#define FSP_FSCTL_DRIVER_NAME "WinFsp"
#define FSP_FSCTL_DISK_DEVICE_NAME "WinFsp.Disk"
#define FSP_FSCTL_NET_DEVICE_NAME "WinFsp.Net"
#define FSP_FSCTL_VOLUME_PARAMS_PREFIX "\\VolumeParams="
// {6F9D25FA-6DEE-4A9D-80F5-E98E14F35E54}
extern const __declspec(selectany) GUID FspFsctlDeviceClassGuid =
{ 0x6f9d25fa, 0x6dee, 0x4a9d, { 0x80, 0xf5, 0xe9, 0x8e, 0x14, 0xf3, 0x5e, 0x54 } };
@ -55,9 +60,14 @@ extern const __declspec(selectany) GUID FspFsvrtDeviceClassGuid =
#define FSP_FSCTL_STOP \
CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'S', METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSP_FSCTL_VOLUME_PARAMS_PREFIX "\\VolumeParams="
#define FSP_FSCTL_VOLUME_NAME_SIZE (64 * sizeof(WCHAR))
#define FSP_FSCTL_VOLUME_PREFIX_SIZE (64 * sizeof(WCHAR))
#define FSP_FSCTL_VOLUME_PREFIX_SIZE (192 * sizeof(WCHAR))
#define FSP_FSCTL_VOLUME_FSNAME_SIZE (16 * sizeof(WCHAR))
#define FSP_FSCTL_VOLUME_NAME_SIZEMAX (FSP_FSCTL_VOLUME_NAME_SIZE + FSP_FSCTL_VOLUME_PREFIX_SIZE)
FSP_FSCTL_STATIC_ASSERT(FSP_FSCTL_VOLUME_NAME_SIZEMAX <= 260 * sizeof(WCHAR),
"Max volume name size is greater than MAX_PATH.");
#define FSP_FSCTL_TRANSACT_PATH_SIZEMAX 2048
@ -135,6 +145,7 @@ typedef struct
UINT32 ExtendedAttributes:1; /* unimplemented; set to 0 */
UINT32 ReadOnlyVolume:1;
WCHAR Prefix[FSP_FSCTL_VOLUME_PREFIX_SIZE / sizeof(WCHAR)]; /* UNC prefix (\Server\Share) */
WCHAR FileSystemName[FSP_FSCTL_VOLUME_FSNAME_SIZE / sizeof(WCHAR)];
} FSP_FSCTL_VOLUME_PARAMS;
typedef struct
{

8
inc/winfsp/winfsp.h
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@ -776,14 +776,8 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
*/
NTSTATUS (*Reserved[41])();
} FSP_FILE_SYSTEM_INTERFACE;
#if defined(WINFSP_DLL_INTERNAL)
/*
* Static_assert is a C++11 feature, but seems to work with C on MSVC 2015.
* Use it to verify that FSP_FILE_SYSTEM_INTERFACE has the right size.
*/
static_assert(sizeof(FSP_FILE_SYSTEM_INTERFACE) == 64 * sizeof(NTSTATUS (*)()),
FSP_FSCTL_STATIC_ASSERT(sizeof(FSP_FILE_SYSTEM_INTERFACE) == 64 * sizeof(NTSTATUS (*)()),
"FSP_FILE_SYSTEM_INTERFACE must have 64 entries.");
#endif
typedef struct _FSP_FILE_SYSTEM
{
UINT16 Version;

4
src/dll/fsctl.c
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@ -32,7 +32,7 @@ FSP_API NTSTATUS FspFsctlCreateVolume(PWSTR DevicePath,
NTSTATUS Result;
PWSTR DeviceRoot;
SIZE_T DeviceRootSize, DevicePathSize;
WCHAR DevicePathBuf[MAX_PATH], *DevicePathPtr, *DevicePathEnd;
WCHAR DevicePathBuf[MAX_PATH + sizeof *VolumeParams], *DevicePathPtr, *DevicePathEnd;
HANDLE VolumeHandle = INVALID_HANDLE_VALUE;
DWORD Bytes;
@ -40,7 +40,7 @@ FSP_API NTSTATUS FspFsctlCreateVolume(PWSTR DevicePath,
VolumeNameBuf[0] = L'\0';
*PVolumeHandle = INVALID_HANDLE_VALUE;
/* check lengths; everything (including encoded volume params) must fit within MAX_PATH */
/* check lengths; everything (including encoded volume params) must fit within DevicePathBuf */
DeviceRoot = L'\\' == DevicePath[0] ? GLOBALROOT : GLOBALROOT "\\Device\\";
DeviceRootSize = lstrlenW(DeviceRoot) * sizeof(WCHAR);
DevicePathSize = lstrlenW(DevicePath) * sizeof(WCHAR);

1
tst/memfs/memfs.cpp
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@ -1153,6 +1153,7 @@ NTSTATUS MemfsCreate(
VolumeParams.ReparsePointsAccessCheck = 0;
if (0 != VolumePrefix)
wcscpy_s(VolumeParams.Prefix, sizeof VolumeParams.Prefix / sizeof(WCHAR), VolumePrefix);
wcscpy_s(VolumeParams.FileSystemName, sizeof VolumeParams.FileSystemName / sizeof(WCHAR), L"MEMFS");
Result = FspFileSystemCreate(DevicePath, &VolumeParams, &MemfsInterface, &Memfs->FileSystem);
if (!NT_SUCCESS(Result))