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sys: fsmup device

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- This commit introduces the fsmup device, which is a major change in how
network file systems are handled. Previously every network file system's
fsvol device was directly registered with the MUP. Now there is a single
fsmup device that is registered with the MUP; network file systems' fsvol
devices register with fsmup instead. The fsmup device maintains a prefix
table which it uses to demultiplex and forward requests to the appropriate
fsvol device.
- This device change was necessatitated to fix issue #87.
This commit is contained in:
Bill Zissimopoulos
2018-01-16 10:38:52 -08:00
parent 670a38d549
commit a4629b8f8b
12 changed files with 435 additions and 168 deletions
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111
src/sys/driver.c
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@ -44,45 +44,6 @@ NTSTATUS DriverEntry(
{
FSP_ENTER_DRV();
FspDriverMultiVersionInitialize();
Result = FspProcessBufferInitialize();
if (!NT_SUCCESS(Result))
FSP_RETURN();
FspDriverObject = DriverObject;
ExInitializeResourceLite(&FspDeviceGlobalResource);
/* create the file system control device objects */
UNICODE_STRING DeviceSddl;
UNICODE_STRING DeviceName;
RtlInitUnicodeString(&DeviceSddl, L"" FSP_FSCTL_DEVICE_SDDL);
RtlInitUnicodeString(&DeviceName, L"\\Device\\" FSP_FSCTL_DISK_DEVICE_NAME);
Result = FspDeviceCreateSecure(FspFsctlDeviceExtensionKind, 0,
&DeviceName, FILE_DEVICE_DISK_FILE_SYSTEM, FILE_DEVICE_SECURE_OPEN,
&DeviceSddl, &FspFsctlDeviceClassGuid,
&FspFsctlDiskDeviceObject);
if (!NT_SUCCESS(Result))
{
FspProcessBufferFinalize();
FSP_RETURN();
}
RtlInitUnicodeString(&DeviceName, L"\\Device\\" FSP_FSCTL_NET_DEVICE_NAME);
Result = FspDeviceCreateSecure(FspFsctlDeviceExtensionKind, 0,
&DeviceName, FILE_DEVICE_NETWORK_FILE_SYSTEM, FILE_DEVICE_SECURE_OPEN,
&DeviceSddl, &FspFsctlDeviceClassGuid,
&FspFsctlNetDeviceObject);
if (!NT_SUCCESS(Result))
{
FspDeviceDelete(FspFsctlDiskDeviceObject);
FspProcessBufferFinalize();
FSP_RETURN();
}
Result = FspDeviceInitialize(FspFsctlDiskDeviceObject);
ASSERT(STATUS_SUCCESS == Result);
Result = FspDeviceInitialize(FspFsctlNetDeviceObject);
ASSERT(STATUS_SUCCESS == Result);
/* setup the driver object */
#if defined(FSP_UNLOAD)
DriverObject->DriverUnload = FspUnload;
@ -127,7 +88,6 @@ NTSTATUS DriverEntry(
FspIopCompleteFunction[IRP_MJ_DIRECTORY_CONTROL] = FspFsvolDirectoryControlComplete;
FspIopCompleteFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = FspFsvolFileSystemControlComplete;
FspIopCompleteFunction[IRP_MJ_DEVICE_CONTROL] = FspFsvolDeviceControlComplete;
FspIopCompleteFunction[IRP_MJ_SHUTDOWN] = FspFsvolShutdownComplete;
FspIopCompleteFunction[IRP_MJ_LOCK_CONTROL] = FspFsvolLockControlComplete;
FspIopCompleteFunction[IRP_MJ_CLEANUP] = FspFsvolCleanupComplete;
FspIopCompleteFunction[IRP_MJ_QUERY_SECURITY] = FspFsvolQuerySecurityComplete;
@ -169,9 +129,58 @@ NTSTATUS DriverEntry(
#pragma prefast(suppress:28175, "We are a filesystem: ok to access FastIoDispatch")
DriverObject->FastIoDispatch = &FspFastIoDispatch;
BOOLEAN InitDoneGRes = FALSE, InitDonePsBuf = FALSE;
UNICODE_STRING DeviceSddl;
UNICODE_STRING DeviceName;
FspDriverObject = DriverObject;
ExInitializeResourceLite(&FspDeviceGlobalResource);
InitDoneGRes = TRUE;
FspDriverMultiVersionInitialize();
Result = FspProcessBufferInitialize();
if (!NT_SUCCESS(Result))
goto exit;
InitDonePsBuf = TRUE;
/* create the file system control device objects */
RtlInitUnicodeString(&DeviceSddl, L"" FSP_FSCTL_DEVICE_SDDL);
RtlInitUnicodeString(&DeviceName, L"\\Device\\" FSP_FSCTL_DISK_DEVICE_NAME);
Result = FspDeviceCreateSecure(FspFsctlDeviceExtensionKind, 0,
&DeviceName, FILE_DEVICE_DISK_FILE_SYSTEM, FILE_DEVICE_SECURE_OPEN,
&DeviceSddl, &FspFsctlDeviceClassGuid,
&FspFsctlDiskDeviceObject);
if (!NT_SUCCESS(Result))
goto exit;
RtlInitUnicodeString(&DeviceName, L"\\Device\\" FSP_FSCTL_NET_DEVICE_NAME);
Result = FspDeviceCreateSecure(FspFsctlDeviceExtensionKind, 0,
&DeviceName, FILE_DEVICE_NETWORK_FILE_SYSTEM, FILE_DEVICE_SECURE_OPEN,
&DeviceSddl, &FspFsctlDeviceClassGuid,
&FspFsctlNetDeviceObject);
if (!NT_SUCCESS(Result))
goto exit;
Result = FspDeviceCreate(FspFsmupDeviceExtensionKind, 0,
FILE_DEVICE_NETWORK_FILE_SYSTEM, FILE_REMOTE_DEVICE,
&FspFsmupDeviceObject);
if (!NT_SUCCESS(Result))
goto exit;
Result = FspDeviceInitialize(FspFsctlDiskDeviceObject);
ASSERT(STATUS_SUCCESS == Result);
Result = FspDeviceInitialize(FspFsctlNetDeviceObject);
ASSERT(STATUS_SUCCESS == Result);
Result = FspDeviceInitialize(FspFsmupDeviceObject);
ASSERT(STATUS_SUCCESS == Result);
RtlInitUnicodeString(&DeviceName, L"\\Device\\" FSP_FSCTL_MUP_DEVICE_NAME);
Result = FsRtlRegisterUncProviderEx(&FspMupHandle,
&DeviceName, FspFsmupDeviceObject, 0);
if (!NT_SUCCESS(Result))
goto exit;
/*
* Register our "disk" device as a file system. We do not register our "net" device
* as a file system, but we register with the MUP instead at a later time.
* as a file system; we register with the MUP instead.
*
* Please note that the call below makes our driver unloadable. In fact the driver
* remains unloadable even if we issue an IoUnregisterFileSystem() call immediately
@ -180,6 +189,23 @@ NTSTATUS DriverEntry(
*/
IoRegisterFileSystem(FspFsctlDiskDeviceObject);
Result = STATUS_SUCCESS;
exit:
if (!NT_SUCCESS(Result))
{
if (0 != FspFsmupDeviceObject)
FspDeviceDelete(FspFsmupDeviceObject);
if (0 != FspFsctlNetDeviceObject)
FspDeviceDelete(FspFsctlNetDeviceObject);
if (0 != FspFsctlDiskDeviceObject)
FspDeviceDelete(FspFsctlDiskDeviceObject);
if (InitDonePsBuf)
FspProcessBufferFinalize();
if (InitDoneGRes)
ExDeleteResourceLite(&FspDeviceGlobalResource);
}
#pragma prefast(suppress:28175, "We are in DriverEntry: ok to access DriverName")
FSP_LEAVE_DRV("DriverName=\"%wZ\", RegistryPath=\"%wZ\"",
&DriverObject->DriverName, RegistryPath);
@ -213,6 +239,7 @@ VOID FspUnload(
FspFsctlDiskDeviceObject = 0;
FspFsctlNetDeviceObject = 0;
FspFsmupDeviceObject = 0;
//FspDeviceDeleteAll();
ExDeleteResourceLite(&FspDeviceGlobalResource);
@ -229,6 +256,8 @@ VOID FspUnload(
PDRIVER_OBJECT FspDriverObject;
PDEVICE_OBJECT FspFsctlDiskDeviceObject;
PDEVICE_OBJECT FspFsctlNetDeviceObject;
PDEVICE_OBJECT FspFsmupDeviceObject;
HANDLE FspMupHandle;
FAST_IO_DISPATCH FspFastIoDispatch;
CACHE_MANAGER_CALLBACKS FspCacheManagerCallbacks;