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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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44
src/sys/device.c
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@ -63,6 +63,8 @@ VOID FspFsvolDeviceGetVolumeInfo(PDEVICE_OBJECT DeviceObject, FSP_FSCTL_VOLUME_I
BOOLEAN FspFsvolDeviceTryGetVolumeInfo(PDEVICE_OBJECT DeviceObject, FSP_FSCTL_VOLUME_INFO *VolumeInfo);
VOID FspFsvolDeviceSetVolumeInfo(PDEVICE_OBJECT DeviceObject, const FSP_FSCTL_VOLUME_INFO *VolumeInfo);
VOID FspFsvolDeviceInvalidateVolumeInfo(PDEVICE_OBJECT DeviceObject);
static NTSTATUS FspFsmupDeviceInit(PDEVICE_OBJECT DeviceObject);
static VOID FspFsmupDeviceFini(PDEVICE_OBJECT DeviceObject);
NTSTATUS FspDeviceCopyList(
PDEVICE_OBJECT **PDeviceObjects, PULONG PDeviceObjectCount);
VOID FspDeviceDeleteList(
@ -94,6 +96,8 @@ VOID FspDeviceDeleteAll(VOID);
#pragma alloc_text(PAGE, FspFsvolDeviceCompareContextByName)
#pragma alloc_text(PAGE, FspFsvolDeviceAllocateContextByName)
#pragma alloc_text(PAGE, FspFsvolDeviceFreeContextByName)
#pragma alloc_text(PAGE, FspFsmupDeviceInit)
#pragma alloc_text(PAGE, FspFsmupDeviceFini)
#pragma alloc_text(PAGE, FspDeviceCopyList)
#pragma alloc_text(PAGE, FspDeviceDeleteList)
#pragma alloc_text(PAGE, FspDeviceDeleteAll)
@ -118,6 +122,9 @@ NTSTATUS FspDeviceCreateSecure(UINT32 Kind, ULONG ExtraSize,
case FspFsvolDeviceExtensionKind:
DeviceExtensionSize = sizeof(FSP_FSVOL_DEVICE_EXTENSION);
break;
case FspFsmupDeviceExtensionKind:
DeviceExtensionSize = sizeof(FSP_FSMUP_DEVICE_EXTENSION);
break;
case FspFsvrtDeviceExtensionKind:
case FspFsctlDeviceExtensionKind:
DeviceExtensionSize = sizeof(FSP_DEVICE_EXTENSION);
@ -173,6 +180,9 @@ NTSTATUS FspDeviceInitialize(PDEVICE_OBJECT DeviceObject)
case FspFsvolDeviceExtensionKind:
Result = FspFsvolDeviceInit(DeviceObject);
break;
case FspFsmupDeviceExtensionKind:
Result = FspFsmupDeviceInit(DeviceObject);
break;
case FspFsvrtDeviceExtensionKind:
case FspFsctlDeviceExtensionKind:
Result = STATUS_SUCCESS;
@ -199,6 +209,9 @@ VOID FspDeviceDelete(PDEVICE_OBJECT DeviceObject)
case FspFsvolDeviceExtensionKind:
FspFsvolDeviceFini(DeviceObject);
break;
case FspFsmupDeviceExtensionKind:
FspFsmupDeviceFini(DeviceObject);
break;
case FspFsvrtDeviceExtensionKind:
case FspFsctlDeviceExtensionKind:
break;
@ -876,6 +889,37 @@ VOID FspFsvolDeviceInvalidateVolumeInfo(PDEVICE_OBJECT DeviceObject)
KeReleaseSpinLock(&FsvolDeviceExtension->InfoSpinLock, Irql);
}
static NTSTATUS FspFsmupDeviceInit(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
FSP_FSMUP_DEVICE_EXTENSION *FsmupDeviceExtension = FspFsmupDeviceExtension(DeviceObject);
/* initialize our prefix table */
ExInitializeResourceLite(&FsmupDeviceExtension->PrefixTableResource);
RtlInitializeUnicodePrefix(&FsmupDeviceExtension->PrefixTable);
FsmupDeviceExtension->InitDonePfxTab = 1;
return STATUS_SUCCESS;
}
static VOID FspFsmupDeviceFini(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
FSP_FSMUP_DEVICE_EXTENSION *FsmupDeviceExtension = FspFsmupDeviceExtension(DeviceObject);
if (FsmupDeviceExtension->InitDonePfxTab)
{
/*
* Normally we would have to finalize our prefix table. This is not necessary as all
* prefixes will be gone if this code ever gets reached.
*/
ASSERT(0 == RtlNextUnicodePrefix(&FsmupDeviceExtension->PrefixTable, TRUE));
ExDeleteResourceLite(&FsmupDeviceExtension->PrefixTableResource);
}
}
NTSTATUS FspDeviceCopyList(
PDEVICE_OBJECT **PDeviceObjects, PULONG PDeviceObjectCount)
{