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![Victor Perevertkin](/assets/img/avatar_default.png)
- Do not access uninitialized SymlinkInformation on failure case and just return - Do not make an assumption that MOUNTMGR_TARGET_NAME has a zero-string
2818 lines
91 KiB
C
2818 lines
91 KiB
C
/*
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* ReactOS kernel
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* Copyright (C) 2011-2012 ReactOS Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: drivers/filesystem/mountmgr/device.c
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* PURPOSE: Mount Manager - Device Control
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* PROGRAMMER: Pierre Schweitzer (pierre.schweitzer@reactos.org)
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*/
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#include "mntmgr.h"
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#define MAX_DEVICES 0x3E8 /* Matches 1000 devices */
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#define NDEBUG
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#include <debug.h>
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/*
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* @implemented
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*/
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NTSTATUS
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MountMgrChangeNotify(IN PDEVICE_EXTENSION DeviceExtension,
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IN PIRP Irp)
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{
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KIRQL OldIrql;
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NTSTATUS Status;
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PIO_STACK_LOCATION Stack;
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PMOUNTMGR_CHANGE_NOTIFY_INFO ChangeNotify;
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/* Get the I/O buffer */
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Stack = IoGetCurrentIrpStackLocation(Irp);
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ChangeNotify = (PMOUNTMGR_CHANGE_NOTIFY_INFO)Irp->AssociatedIrp.SystemBuffer;
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/* Validate it */
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if (Stack->Parameters.DeviceIoControl.OutputBufferLength < sizeof(MOUNTMGR_CHANGE_NOTIFY_INFO) ||
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Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_CHANGE_NOTIFY_INFO))
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{
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return STATUS_INVALID_PARAMETER;
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}
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/* If epic number doesn't match, just return now one */
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if (DeviceExtension->EpicNumber != ChangeNotify->EpicNumber)
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{
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ChangeNotify->EpicNumber = DeviceExtension->EpicNumber;
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Irp->IoStatus.Information = sizeof(MOUNTMGR_CHANGE_NOTIFY_INFO);
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return STATUS_SUCCESS;
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}
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/* If IRP is to be canceled, forget about that */
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IoAcquireCancelSpinLock(&OldIrql);
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if (Irp->Cancel)
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{
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Status = STATUS_CANCELLED;
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}
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/* Otherwise queue the IRP to be notified with the next epic number change */
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else
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{
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InsertTailList(&(DeviceExtension->IrpListHead), &(Irp->Tail.Overlay.ListEntry));
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IoMarkIrpPending(Irp);
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IoSetCancelRoutine(Irp, MountMgrCancel);
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Status = STATUS_PENDING;
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}
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IoReleaseCancelSpinLock(OldIrql);
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return Status;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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MountmgrWriteNoAutoMount(IN PDEVICE_EXTENSION DeviceExtension)
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{
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ULONG Value = DeviceExtension->NoAutoMount;
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return RtlWriteRegistryValue(RTL_REGISTRY_ABSOLUTE,
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DeviceExtension->RegistryPath.Buffer,
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L"NoAutoMount",
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REG_DWORD,
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&Value,
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sizeof(Value));
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}
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/*
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* @implemented
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*/
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NTSTATUS
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MountMgrSetAutoMount(IN PDEVICE_EXTENSION DeviceExtension,
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IN PIRP Irp)
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{
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PIO_STACK_LOCATION Stack;
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PMOUNTMGR_SET_AUTO_MOUNT SetState;
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Stack = IoGetCurrentIrpStackLocation(Irp);
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if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_SET_AUTO_MOUNT))
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{
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Irp->IoStatus.Information = 0;
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return STATUS_INVALID_PARAMETER;
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}
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/* Only change if there's a real difference */
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SetState = (PMOUNTMGR_SET_AUTO_MOUNT)Irp->AssociatedIrp.SystemBuffer;
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if (SetState->NewState == !DeviceExtension->NoAutoMount)
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{
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Irp->IoStatus.Information = 0;
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return STATUS_SUCCESS;
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}
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/* Set new state; ! on purpose */
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DeviceExtension->NoAutoMount = !SetState->NewState;
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Irp->IoStatus.Information = 0;
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return MountmgrWriteNoAutoMount(DeviceExtension);
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}
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/*
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* @implemented
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*/
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NTSTATUS
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MountMgrQueryAutoMount(IN PDEVICE_EXTENSION DeviceExtension,
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IN PIRP Irp)
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{
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PIO_STACK_LOCATION Stack;
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PMOUNTMGR_QUERY_AUTO_MOUNT QueryState;
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Stack = IoGetCurrentIrpStackLocation(Irp);
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if (Stack->Parameters.DeviceIoControl.OutputBufferLength < sizeof(MOUNTMGR_QUERY_AUTO_MOUNT))
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{
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Irp->IoStatus.Information = 0;
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return STATUS_INVALID_PARAMETER;
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}
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QueryState = (PMOUNTMGR_QUERY_AUTO_MOUNT)Irp->AssociatedIrp.SystemBuffer;
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QueryState->CurrentState = !DeviceExtension->NoAutoMount;
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Irp->IoStatus.Information = sizeof(MOUNTMGR_QUERY_AUTO_MOUNT);
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return STATUS_SUCCESS;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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ScrubRegistryRoutine(IN PWSTR ValueName,
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IN ULONG ValueType,
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IN PVOID ValueData,
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IN ULONG ValueLength,
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IN PVOID Context,
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IN PVOID EntryContext)
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{
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NTSTATUS Status;
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PLIST_ENTRY NextEntry;
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PDEVICE_INFORMATION DeviceInfo;
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PBOOLEAN Continue = EntryContext;
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PDEVICE_EXTENSION DeviceExtension = Context;
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if (ValueType != REG_BINARY)
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{
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return STATUS_SUCCESS;
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}
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/* Delete values for devices that don't have the matching unique ID */
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if (!IsListEmpty(&(DeviceExtension->DeviceListHead)))
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{
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for (NextEntry = DeviceExtension->DeviceListHead.Flink;
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NextEntry != &(DeviceExtension->DeviceListHead);
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NextEntry = NextEntry->Flink)
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{
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DeviceInfo = CONTAINING_RECORD(NextEntry,
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DEVICE_INFORMATION,
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DeviceListEntry);
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if (!DeviceInfo->UniqueId || DeviceInfo->UniqueId->UniqueIdLength != ValueLength)
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{
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continue;
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}
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if (RtlCompareMemory(DeviceInfo->UniqueId->UniqueId, ValueData, ValueLength) == ValueLength)
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{
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return STATUS_SUCCESS;
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}
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}
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}
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/* Wrong unique ID, scrub it */
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Status = RtlDeleteRegistryValue(RTL_REGISTRY_ABSOLUTE,
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DatabasePath,
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ValueName);
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if (!NT_SUCCESS(Status))
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{
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*Continue = TRUE;
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return STATUS_UNSUCCESSFUL;
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}
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*Continue = FALSE;
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return Status;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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MountMgrScrubRegistry(IN PDEVICE_EXTENSION DeviceExtension)
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{
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NTSTATUS Status;
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BOOLEAN Continue;
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RTL_QUERY_REGISTRY_TABLE QueryTable[2];
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do
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{
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RtlZeroMemory(QueryTable, sizeof(QueryTable));
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QueryTable[0].QueryRoutine = ScrubRegistryRoutine;
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QueryTable[0].EntryContext = &Continue;
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Continue = FALSE;
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Status = RtlQueryRegistryValues(RTL_REGISTRY_ABSOLUTE,
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DatabasePath,
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QueryTable,
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DeviceExtension,
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NULL);
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}
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while (Continue);
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return Status;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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MountMgrCreatePoint(IN PDEVICE_EXTENSION DeviceExtension,
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IN PIRP Irp)
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{
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ULONG MaxLength;
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PIO_STACK_LOCATION Stack;
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PMOUNTMGR_CREATE_POINT_INPUT Point;
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UNICODE_STRING DeviceName, SymbolicName;
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Stack = IoGetCurrentIrpStackLocation(Irp);
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if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_CREATE_POINT_INPUT))
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{
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return STATUS_INVALID_PARAMETER;
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}
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Point = (PMOUNTMGR_CREATE_POINT_INPUT)Irp->AssociatedIrp.SystemBuffer;
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MaxLength = MAX((Point->DeviceNameOffset + Point->DeviceNameLength),
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(Point->SymbolicLinkNameLength + Point->SymbolicLinkNameOffset));
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if (MaxLength > Stack->Parameters.DeviceIoControl.InputBufferLength)
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{
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return STATUS_INVALID_PARAMETER;
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}
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/* Get all the strings and call the worker */
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SymbolicName.Length = Point->SymbolicLinkNameLength;
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SymbolicName.MaximumLength = Point->SymbolicLinkNameLength;
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DeviceName.Length = Point->DeviceNameLength;
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DeviceName.MaximumLength = Point->DeviceNameLength;
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SymbolicName.Buffer = (PVOID)((ULONG_PTR)Point + Point->SymbolicLinkNameOffset);
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DeviceName.Buffer = (PVOID)((ULONG_PTR)Point + Point->DeviceNameOffset);
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return MountMgrCreatePointWorker(DeviceExtension, &SymbolicName, &DeviceName);
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}
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/*
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* @implemented
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*/
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NTSTATUS
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MountMgrCheckUnprocessedVolumes(IN PDEVICE_EXTENSION DeviceExtension,
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IN PIRP Irp)
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{
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PLIST_ENTRY NextEntry;
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PDEVICE_INFORMATION DeviceInformation;
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NTSTATUS ArrivalStatus, Status = STATUS_SUCCESS;
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UNREFERENCED_PARAMETER(Irp);
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/* No offline volumes, nothing more to do */
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if (IsListEmpty(&(DeviceExtension->OfflineDeviceListHead)))
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{
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KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT, 1, FALSE);
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return STATUS_SUCCESS;
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}
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KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT, 1, FALSE);
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/* Reactivate all the offline volumes */
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while (!IsListEmpty(&(DeviceExtension->OfflineDeviceListHead)))
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{
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NextEntry = RemoveHeadList(&(DeviceExtension->OfflineDeviceListHead));
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DeviceInformation = CONTAINING_RECORD(NextEntry, DEVICE_INFORMATION, DeviceListEntry);
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ArrivalStatus = MountMgrMountedDeviceArrival(DeviceExtension,
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&(DeviceInformation->SymbolicName),
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DeviceInformation->ManuallyRegistered);
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/* Then, remove them dead information */
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MountMgrFreeDeadDeviceInfo(DeviceInformation);
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if (NT_SUCCESS(Status))
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{
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Status = ArrivalStatus;
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}
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}
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return Status;
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}
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/*
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* @implemented
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*/
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BOOLEAN
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IsFtVolume(IN PUNICODE_STRING SymbolicName)
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{
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PIRP Irp;
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KEVENT Event;
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NTSTATUS Status;
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PFILE_OBJECT FileObject;
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IO_STATUS_BLOCK IoStatusBlock;
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PARTITION_INFORMATION PartitionInfo;
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PDEVICE_OBJECT DeviceObject, FileDeviceObject;
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/* Get device object */
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Status = IoGetDeviceObjectPointer(SymbolicName,
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FILE_READ_ATTRIBUTES,
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&FileObject,
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&DeviceObject);
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if (!NT_SUCCESS(Status))
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{
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return FALSE;
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}
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/* Get attached device */
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FileDeviceObject = FileObject->DeviceObject;
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DeviceObject = IoGetAttachedDeviceReference(FileDeviceObject);
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/* FT volume can't be removable */
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if (FileDeviceObject->Characteristics & FILE_REMOVABLE_MEDIA)
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{
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ObDereferenceObject(DeviceObject);
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ObDereferenceObject(FileObject);
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return FALSE;
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}
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ObDereferenceObject(FileObject);
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/* Get partition information */
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KeInitializeEvent(&Event, NotificationEvent, FALSE);
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Irp = IoBuildDeviceIoControlRequest(IOCTL_DISK_GET_PARTITION_INFO,
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DeviceObject,
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NULL,
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0,
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&PartitionInfo,
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sizeof(PartitionInfo),
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FALSE,
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&Event,
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&IoStatusBlock);
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if (!Irp)
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{
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ObDereferenceObject(DeviceObject);
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return FALSE;
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}
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Status = IoCallDriver(DeviceObject, Irp);
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if (Status == STATUS_PENDING)
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{
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KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
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Status = IoStatusBlock.Status;
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}
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ObDereferenceObject(DeviceObject);
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if (!NT_SUCCESS(Status))
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{
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return FALSE;
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}
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/* Check if this is a FT volume */
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return IsFTPartition(PartitionInfo.PartitionType);
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}
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/*
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* @implemented
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*/
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VOID
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ProcessSuggestedDriveLetters(IN PDEVICE_EXTENSION DeviceExtension)
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{
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WCHAR NameBuffer[DRIVE_LETTER_LENGTH / sizeof(WCHAR)];
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PLIST_ENTRY NextEntry;
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UNICODE_STRING SymbolicName;
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PDEVICE_INFORMATION DeviceInformation;
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/* No devices? Nothing to do! */
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if (IsListEmpty(&(DeviceExtension->DeviceListHead)))
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{
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return;
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}
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/* For all the devices */
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for (NextEntry = DeviceExtension->DeviceListHead.Flink;
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NextEntry != &(DeviceExtension->DeviceListHead);
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NextEntry = NextEntry->Flink)
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{
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DeviceInformation = CONTAINING_RECORD(NextEntry, DEVICE_INFORMATION, DeviceListEntry);
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/* If no drive letter */
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if (DeviceInformation->SuggestedDriveLetter == (UCHAR)-1)
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{
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/* Ensure it has no entry yet */
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if (!HasDriveLetter(DeviceInformation) &&
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!HasNoDriveLetterEntry(DeviceInformation->UniqueId))
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{
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/* And create one */
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CreateNoDriveLetterEntry(DeviceInformation->UniqueId);
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}
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DeviceInformation->SuggestedDriveLetter = 0;
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}
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/* Suggested letter & no entry */
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else if (DeviceInformation->SuggestedDriveLetter &&
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!HasNoDriveLetterEntry(DeviceInformation->UniqueId))
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{
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/* Just create a mount point */
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SymbolicName.Buffer = NameBuffer;
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RtlCopyMemory(NameBuffer, DosDevices.Buffer, DosDevices.Length);
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NameBuffer[LETTER_POSITION] = DeviceInformation->SuggestedDriveLetter;
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NameBuffer[COLON_POSITION] = L':';
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SymbolicName.Length =
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SymbolicName.MaximumLength = DRIVE_LETTER_LENGTH;
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MountMgrCreatePointWorker(DeviceExtension, &SymbolicName, &(DeviceInformation->DeviceName));
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}
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}
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}
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/*
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* @implemented
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|
*/
|
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NTSTATUS
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MountMgrNextDriveLetterWorker(IN PDEVICE_EXTENSION DeviceExtension,
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IN PUNICODE_STRING DeviceName,
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OUT PMOUNTMGR_DRIVE_LETTER_INFORMATION DriveLetterInfo)
|
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{
|
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NTSTATUS Status;
|
|
UCHAR DriveLetter;
|
|
PLIST_ENTRY NextEntry;
|
|
PMOUNTDEV_UNIQUE_ID UniqueId;
|
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BOOLEAN Removable, GptDriveLetter;
|
|
PDEVICE_INFORMATION DeviceInformation;
|
|
WCHAR NameBuffer[DRIVE_LETTER_LENGTH];
|
|
PSYMLINK_INFORMATION SymlinkInformation;
|
|
UNICODE_STRING TargetDeviceName, SymbolicName;
|
|
|
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/* First, process suggested letters */
|
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if (!DeviceExtension->ProcessedSuggestions)
|
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{
|
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ProcessSuggestedDriveLetters(DeviceExtension);
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DeviceExtension->ProcessedSuggestions = TRUE;
|
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}
|
|
|
|
/* Then, get information about the device */
|
|
Status = QueryDeviceInformation(DeviceName, &TargetDeviceName, NULL, &Removable, &GptDriveLetter, NULL, NULL, NULL);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
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return Status;
|
|
}
|
|
|
|
/* Ensure we have such device */
|
|
NextEntry = DeviceExtension->DeviceListHead.Flink;
|
|
while (NextEntry != &(DeviceExtension->DeviceListHead))
|
|
{
|
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DeviceInformation = CONTAINING_RECORD(NextEntry, DEVICE_INFORMATION, DeviceListEntry);
|
|
|
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if (RtlCompareUnicodeString(&(DeviceInformation->DeviceName), &TargetDeviceName, TRUE) == 0)
|
|
{
|
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break;
|
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}
|
|
|
|
NextEntry = NextEntry->Flink;
|
|
}
|
|
|
|
if (NextEntry == &(DeviceExtension->DeviceListHead))
|
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{
|
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FreePool(TargetDeviceName.Buffer);
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return STATUS_OBJECT_NAME_NOT_FOUND;
|
|
}
|
|
|
|
/* Now, mark we have assigned a letter (assumption) */
|
|
DeviceInformation->LetterAssigned =
|
|
DriveLetterInfo->DriveLetterWasAssigned = TRUE;
|
|
|
|
/* Browse all the symlinks to check if there is already a drive letter */
|
|
NextEntry = DeviceInformation->SymbolicLinksListHead.Flink;
|
|
while (NextEntry != &(DeviceInformation->SymbolicLinksListHead))
|
|
{
|
|
SymlinkInformation = CONTAINING_RECORD(NextEntry, SYMLINK_INFORMATION, SymbolicLinksListEntry);
|
|
|
|
/* If this is a drive letter and it is online, forget about new drive letter */
|
|
if (IsDriveLetter(&(SymlinkInformation->Name)) && SymlinkInformation->Online)
|
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{
|
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DriveLetterInfo->DriveLetterWasAssigned = FALSE;
|
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DriveLetterInfo->CurrentDriveLetter = (CHAR)SymlinkInformation->Name.Buffer[LETTER_POSITION];
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break;
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}
|
|
|
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NextEntry = NextEntry->Flink;
|
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}
|
|
|
|
/* If we didn't find a drive letter online
|
|
* ensure this is not a no drive entry
|
|
* by querying GPT attributes & database
|
|
*/
|
|
if (NextEntry == &(DeviceInformation->SymbolicLinksListHead))
|
|
{
|
|
if (!GptDriveLetter || HasNoDriveLetterEntry(DeviceInformation->UniqueId))
|
|
{
|
|
DriveLetterInfo->DriveLetterWasAssigned = FALSE;
|
|
DriveLetterInfo->CurrentDriveLetter = 0;
|
|
|
|
goto Release;
|
|
}
|
|
}
|
|
|
|
/* No, ensure that the device is not automounted nor removable */
|
|
if (!DeviceExtension->NoAutoMount && !Removable)
|
|
{
|
|
if (DriveLetterInfo->DriveLetterWasAssigned)
|
|
{
|
|
DriveLetterInfo->DriveLetterWasAssigned = FALSE;
|
|
DriveLetterInfo->CurrentDriveLetter = 0;
|
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|
|
goto Release;
|
|
}
|
|
}
|
|
|
|
if (!DriveLetterInfo->DriveLetterWasAssigned)
|
|
{
|
|
goto Release;
|
|
}
|
|
|
|
/* Now everything is fine, start processing */
|
|
|
|
if (RtlPrefixUnicodeString(&DeviceFloppy, &TargetDeviceName, TRUE))
|
|
{
|
|
/* If the device is a floppy, start with letter A */
|
|
DriveLetter = 'A';
|
|
}
|
|
else if (RtlPrefixUnicodeString(&DeviceCdRom, &TargetDeviceName, TRUE))
|
|
{
|
|
/* If the device is a CD-ROM, start with letter D */
|
|
DriveLetter = 'D';
|
|
}
|
|
else
|
|
{
|
|
/* Finally, if it's a disk, use C */
|
|
DriveLetter = 'C';
|
|
}
|
|
|
|
/* We cannot set NO drive letter */
|
|
ASSERT(DeviceInformation->SuggestedDriveLetter != (UCHAR)-1);
|
|
|
|
/* If we don't have suggested letter but it's a FT volume, fail */
|
|
if (!DeviceInformation->SuggestedDriveLetter && IsFtVolume(&(DeviceInformation->DeviceName)))
|
|
{
|
|
DriveLetterInfo->DriveLetterWasAssigned = FALSE;
|
|
DriveLetterInfo->CurrentDriveLetter = 0;
|
|
|
|
goto Release;
|
|
}
|
|
|
|
/* Prepare buffer */
|
|
RtlCopyMemory(NameBuffer, DosDevices.Buffer, DosDevices.Length);
|
|
NameBuffer[COLON_POSITION] = L':';
|
|
SymbolicName.Buffer = NameBuffer;
|
|
SymbolicName.Length =
|
|
SymbolicName.MaximumLength = DRIVE_LETTER_LENGTH;
|
|
|
|
/* It's all prepared, create mount point */
|
|
if (DeviceInformation->SuggestedDriveLetter)
|
|
{
|
|
DriveLetterInfo->CurrentDriveLetter = DeviceInformation->SuggestedDriveLetter;
|
|
NameBuffer[LETTER_POSITION] = DeviceInformation->SuggestedDriveLetter;
|
|
|
|
Status = MountMgrCreatePointWorker(DeviceExtension, &SymbolicName, &TargetDeviceName);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
goto Release;
|
|
}
|
|
}
|
|
|
|
/* It failed with this letter... Try another one! */
|
|
for (DriveLetterInfo->CurrentDriveLetter = DriveLetter;
|
|
DriveLetterInfo->CurrentDriveLetter <= L'Z';
|
|
DriveLetterInfo->CurrentDriveLetter++)
|
|
{
|
|
NameBuffer[LETTER_POSITION] = DriveLetterInfo->CurrentDriveLetter;
|
|
|
|
Status = MountMgrCreatePointWorker(DeviceExtension, &SymbolicName, &TargetDeviceName);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* We failed setting a letter */
|
|
if (DriveLetterInfo->CurrentDriveLetter > L'Z')
|
|
{
|
|
DriveLetterInfo->DriveLetterWasAssigned = FALSE;
|
|
DriveLetterInfo->CurrentDriveLetter = 0;
|
|
|
|
/* Try at least to add a no drive letter entry */
|
|
Status = QueryDeviceInformation(&TargetDeviceName, NULL, &UniqueId, NULL, NULL, NULL, NULL, NULL);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
CreateNoDriveLetterEntry(UniqueId);
|
|
FreePool(UniqueId);
|
|
}
|
|
}
|
|
|
|
Release:
|
|
FreePool(TargetDeviceName.Buffer);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrNextDriveLetter(IN PDEVICE_EXTENSION DeviceExtension,
|
|
IN PIRP Irp)
|
|
{
|
|
NTSTATUS Status;
|
|
PIO_STACK_LOCATION Stack;
|
|
UNICODE_STRING DeviceName;
|
|
PMOUNTMGR_DRIVE_LETTER_TARGET DriveLetterTarget;
|
|
MOUNTMGR_DRIVE_LETTER_INFORMATION DriveLetterInformation;
|
|
|
|
Stack = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
/* Validate input */
|
|
if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_DRIVE_LETTER_TARGET) ||
|
|
Stack->Parameters.DeviceIoControl.OutputBufferLength < sizeof(MOUNTMGR_DRIVE_LETTER_INFORMATION))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
DriveLetterTarget = (PMOUNTMGR_DRIVE_LETTER_TARGET)Irp->AssociatedIrp.SystemBuffer;
|
|
if (DriveLetterTarget->DeviceNameLength + sizeof(USHORT) > Stack->Parameters.DeviceIoControl.InputBufferLength)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Call the worker */
|
|
DeviceName.Buffer = DriveLetterTarget->DeviceName;
|
|
DeviceName.Length =
|
|
DeviceName.MaximumLength = DriveLetterTarget->DeviceNameLength;
|
|
|
|
Status = MountMgrNextDriveLetterWorker(DeviceExtension, &DeviceName,
|
|
&DriveLetterInformation);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
*(PMOUNTMGR_DRIVE_LETTER_INFORMATION)Irp->AssociatedIrp.SystemBuffer =
|
|
DriveLetterInformation;
|
|
Irp->IoStatus.Information = sizeof(MOUNTMGR_DRIVE_LETTER_INFORMATION);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
NTAPI
|
|
MountMgrQuerySystemVolumeNameQueryRoutine(IN PWSTR ValueName,
|
|
IN ULONG ValueType,
|
|
IN PVOID ValueData,
|
|
IN ULONG ValueLength,
|
|
IN PVOID Context,
|
|
IN PVOID EntryContext)
|
|
{
|
|
UNICODE_STRING ValueString;
|
|
PUNICODE_STRING SystemVolumeName;
|
|
|
|
UNREFERENCED_PARAMETER(ValueName);
|
|
UNREFERENCED_PARAMETER(ValueLength);
|
|
UNREFERENCED_PARAMETER(EntryContext);
|
|
|
|
if (ValueType != REG_SZ)
|
|
{
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
RtlInitUnicodeString(&ValueString, ValueData);
|
|
SystemVolumeName = Context;
|
|
|
|
/* Return a string containing system volume name */
|
|
SystemVolumeName->Length = ValueString.Length;
|
|
SystemVolumeName->MaximumLength = ValueString.Length + sizeof(WCHAR);
|
|
SystemVolumeName->Buffer = AllocatePool(SystemVolumeName->MaximumLength);
|
|
if (SystemVolumeName->Buffer)
|
|
{
|
|
RtlCopyMemory(SystemVolumeName->Buffer, ValueData, ValueString.Length);
|
|
SystemVolumeName->Buffer[ValueString.Length / sizeof(WCHAR)] = UNICODE_NULL;
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrQuerySystemVolumeName(OUT PUNICODE_STRING SystemVolumeName)
|
|
{
|
|
RTL_QUERY_REGISTRY_TABLE QueryTable[2];
|
|
|
|
RtlZeroMemory(QueryTable, sizeof(QueryTable));
|
|
QueryTable[0].QueryRoutine = MountMgrQuerySystemVolumeNameQueryRoutine;
|
|
QueryTable[0].Flags = RTL_QUERY_REGISTRY_REQUIRED;
|
|
QueryTable[0].Name = L"SystemPartition";
|
|
|
|
SystemVolumeName->Buffer = NULL;
|
|
|
|
RtlQueryRegistryValues(RTL_REGISTRY_ABSOLUTE,
|
|
L"\\Registry\\Machine\\System\\Setup",
|
|
QueryTable,
|
|
SystemVolumeName,
|
|
NULL);
|
|
|
|
if (SystemVolumeName->Buffer)
|
|
{
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
return STATUS_UNSUCCESSFUL;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
VOID
|
|
MountMgrAssignDriveLetters(IN PDEVICE_EXTENSION DeviceExtension)
|
|
{
|
|
NTSTATUS Status;
|
|
PLIST_ENTRY NextEntry;
|
|
UNICODE_STRING SystemVolumeName;
|
|
PDEVICE_INFORMATION DeviceInformation;
|
|
MOUNTMGR_DRIVE_LETTER_INFORMATION DriveLetterInformation;
|
|
|
|
/* First, get system volume name */
|
|
Status = MountMgrQuerySystemVolumeName(&SystemVolumeName);
|
|
|
|
/* If there are no device, it's all done */
|
|
if (IsListEmpty(&(DeviceExtension->DeviceListHead)))
|
|
{
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
FreePool(SystemVolumeName.Buffer);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/* Now, for all the devices... */
|
|
for (NextEntry = DeviceExtension->DeviceListHead.Flink;
|
|
NextEntry != &(DeviceExtension->DeviceListHead);
|
|
NextEntry = NextEntry->Flink)
|
|
{
|
|
DeviceInformation = CONTAINING_RECORD(NextEntry, DEVICE_INFORMATION, DeviceListEntry);
|
|
|
|
/* If the device doesn't have a letter assigned, do it! */
|
|
if (!DeviceInformation->LetterAssigned)
|
|
{
|
|
MountMgrNextDriveLetterWorker(DeviceExtension,
|
|
&(DeviceInformation->DeviceName),
|
|
&DriveLetterInformation);
|
|
}
|
|
|
|
/* If it was the system volume */
|
|
if (NT_SUCCESS(Status) && RtlEqualUnicodeString(&SystemVolumeName, &(DeviceInformation->DeviceName), TRUE))
|
|
{
|
|
/* Keep track of it */
|
|
DeviceExtension->DriveLetterData = AllocatePool(DeviceInformation->UniqueId->UniqueIdLength +
|
|
sizeof(MOUNTDEV_UNIQUE_ID));
|
|
if (DeviceExtension->DriveLetterData)
|
|
{
|
|
RtlCopyMemory(DeviceExtension->DriveLetterData,
|
|
DeviceInformation->UniqueId,
|
|
DeviceInformation->UniqueId->UniqueIdLength + sizeof(MOUNTDEV_UNIQUE_ID));
|
|
}
|
|
|
|
/* If it was not automount, ensure it gets mounted */
|
|
if (!DeviceExtension->NoAutoMount)
|
|
{
|
|
DeviceExtension->NoAutoMount = TRUE;
|
|
|
|
MountMgrNextDriveLetterWorker(DeviceExtension,
|
|
&(DeviceInformation->DeviceName),
|
|
&DriveLetterInformation);
|
|
|
|
DeviceExtension->NoAutoMount = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
FreePool(SystemVolumeName.Buffer);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrQueryDosVolumePath(IN PDEVICE_EXTENSION DeviceExtension,
|
|
IN PIRP Irp)
|
|
{
|
|
NTSTATUS Status;
|
|
ULONG DevicesFound;
|
|
PIO_STACK_LOCATION Stack;
|
|
PLIST_ENTRY SymlinksEntry;
|
|
UNICODE_STRING SymbolicName;
|
|
PMOUNTMGR_TARGET_NAME Target;
|
|
PWSTR DeviceString, OldBuffer;
|
|
USHORT DeviceLength, OldLength;
|
|
PDEVICE_INFORMATION DeviceInformation;
|
|
PSYMLINK_INFORMATION SymlinkInformation;
|
|
PASSOCIATED_DEVICE_ENTRY AssociatedDevice;
|
|
|
|
Stack = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
/* Validate input size */
|
|
if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_TARGET_NAME))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Ensure we have received UNICODE_STRING */
|
|
Target = (PMOUNTMGR_TARGET_NAME)Irp->AssociatedIrp.SystemBuffer;
|
|
if (Target->DeviceNameLength & 1)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Validate the entry structure size */
|
|
if ((FIELD_OFFSET(MOUNTMGR_TARGET_NAME, DeviceNameLength) + Target->DeviceNameLength) >
|
|
Stack->Parameters.DeviceIoControl.InputBufferLength)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Ensure we can at least return needed size */
|
|
if (Stack->Parameters.DeviceIoControl.OutputBufferLength < sizeof(ULONG))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Construct string for query */
|
|
SymbolicName.Length = Target->DeviceNameLength;
|
|
SymbolicName.MaximumLength = Target->DeviceNameLength;
|
|
SymbolicName.Buffer = Target->DeviceName;
|
|
|
|
/* Find device with our info */
|
|
Status = FindDeviceInfo(DeviceExtension, &SymbolicName, FALSE, &DeviceInformation);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
return Status;
|
|
}
|
|
|
|
DeviceLength = 0;
|
|
DeviceString = NULL;
|
|
DevicesFound = 0;
|
|
|
|
/* Try to find associated device info */
|
|
while (TRUE)
|
|
{
|
|
for (SymlinksEntry = DeviceInformation->SymbolicLinksListHead.Flink;
|
|
SymlinksEntry != &(DeviceInformation->SymbolicLinksListHead);
|
|
SymlinksEntry = SymlinksEntry->Flink)
|
|
{
|
|
SymlinkInformation = CONTAINING_RECORD(SymlinksEntry, SYMLINK_INFORMATION, SymbolicLinksListEntry);
|
|
|
|
/* Try to find with drive letter */
|
|
if (MOUNTMGR_IS_DRIVE_LETTER(&SymlinkInformation->Name) && SymlinkInformation->Online)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* We didn't find, break */
|
|
if (SymlinksEntry == &(DeviceInformation->SymbolicLinksListHead))
|
|
{
|
|
return STATUS_NOT_FOUND;
|
|
}
|
|
|
|
/* It doesn't have associated device, go to fallback method */
|
|
if (IsListEmpty(&DeviceInformation->AssociatedDevicesHead))
|
|
{
|
|
goto TryWithVolumeName;
|
|
}
|
|
|
|
/* Create a string with the information about the device */
|
|
AssociatedDevice = CONTAINING_RECORD(&(DeviceInformation->SymbolicLinksListHead), ASSOCIATED_DEVICE_ENTRY, AssociatedDevicesEntry);
|
|
OldLength = DeviceLength;
|
|
OldBuffer = DeviceString;
|
|
DeviceLength += AssociatedDevice->String.Length;
|
|
DeviceString = AllocatePool(DeviceLength);
|
|
if (!DeviceString)
|
|
{
|
|
if (OldBuffer)
|
|
{
|
|
FreePool(OldBuffer);
|
|
}
|
|
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Store our info and previous if any */
|
|
RtlCopyMemory(DeviceString, AssociatedDevice->String.Buffer, AssociatedDevice->String.Length);
|
|
if (OldBuffer)
|
|
{
|
|
RtlCopyMemory(&DeviceString[AssociatedDevice->String.Length / sizeof(WCHAR)], OldBuffer, OldLength);
|
|
FreePool(OldBuffer);
|
|
}
|
|
|
|
/* Count and continue looking */
|
|
++DevicesFound;
|
|
DeviceInformation = AssociatedDevice->DeviceInformation;
|
|
|
|
/* If too many devices, try another way */
|
|
if (DevicesFound > MAX_DEVICES) /* 1000 */
|
|
{
|
|
goto TryWithVolumeName;
|
|
}
|
|
}
|
|
|
|
/* Reallocate our string, so that we can prepend disk letter */
|
|
OldBuffer = DeviceString;
|
|
OldLength = DeviceLength;
|
|
DeviceLength += 2 * sizeof(WCHAR);
|
|
DeviceString = AllocatePool(DeviceLength);
|
|
if (!DeviceString)
|
|
{
|
|
if (OldBuffer)
|
|
{
|
|
FreePool(OldBuffer);
|
|
}
|
|
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Get the letter */
|
|
DeviceString[0] = SymlinkInformation->Name.Buffer[LETTER_POSITION];
|
|
DeviceString[1] = L':';
|
|
|
|
/* And copy the rest */
|
|
if (OldBuffer)
|
|
{
|
|
RtlCopyMemory(&DeviceString[2], OldBuffer, OldLength);
|
|
FreePool(OldBuffer);
|
|
}
|
|
|
|
TryWithVolumeName:
|
|
/* If we didn't find anything, try differently */
|
|
if (DeviceLength < 2 * sizeof(WCHAR) || DeviceString[1] != L':')
|
|
{
|
|
if (DeviceString)
|
|
{
|
|
FreePool(DeviceString);
|
|
DeviceLength = 0;
|
|
}
|
|
|
|
/* Try to find a volume name matching */
|
|
for (SymlinksEntry = DeviceInformation->SymbolicLinksListHead.Flink;
|
|
SymlinksEntry != &(DeviceInformation->SymbolicLinksListHead);
|
|
SymlinksEntry = SymlinksEntry->Flink)
|
|
{
|
|
SymlinkInformation = CONTAINING_RECORD(SymlinksEntry, SYMLINK_INFORMATION, SymbolicLinksListEntry);
|
|
|
|
if (MOUNTMGR_IS_VOLUME_NAME(&SymlinkInformation->Name))
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If found copy */
|
|
if (SymlinksEntry != &(DeviceInformation->SymbolicLinksListHead))
|
|
{
|
|
DeviceLength = SymlinkInformation->Name.Length;
|
|
DeviceString = AllocatePool(DeviceLength);
|
|
if (!DeviceString)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(DeviceString, SymlinkInformation->Name.Buffer, DeviceLength);
|
|
/* Ensure we are in the right namespace; [1] can be ? */
|
|
DeviceString[1] = L'\\';
|
|
}
|
|
}
|
|
|
|
/* If we found something */
|
|
if (DeviceString)
|
|
{
|
|
/* At least, we will return our length */
|
|
((PMOUNTMGR_VOLUME_PATHS)Irp->AssociatedIrp.SystemBuffer)->MultiSzLength = DeviceLength;
|
|
/* MOUNTMGR_VOLUME_PATHS is a string + a ULONG */
|
|
Irp->IoStatus.Information = DeviceLength + sizeof(ULONG);
|
|
|
|
/* If we have enough room for copying the string */
|
|
if (sizeof(ULONG) + DeviceLength <= Stack->Parameters.DeviceIoControl.OutputBufferLength)
|
|
{
|
|
/* Copy it */
|
|
if (DeviceLength)
|
|
{
|
|
RtlCopyMemory(((PMOUNTMGR_VOLUME_PATHS)Irp->AssociatedIrp.SystemBuffer)->MultiSz, DeviceString, DeviceLength);
|
|
}
|
|
|
|
/* And double zero at its end - this is needed in case of multiple paths which are separated by a single 0 */
|
|
FreePool(DeviceString);
|
|
((PMOUNTMGR_VOLUME_PATHS)Irp->AssociatedIrp.SystemBuffer)->MultiSz[DeviceLength / sizeof(WCHAR)] = 0;
|
|
((PMOUNTMGR_VOLUME_PATHS)Irp->AssociatedIrp.SystemBuffer)->MultiSz[DeviceLength / sizeof(WCHAR) + 1] = 0;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
else
|
|
{
|
|
/* Just return appropriate size and leave */
|
|
FreePool(DeviceString);
|
|
Irp->IoStatus.Information = sizeof(ULONG);
|
|
return STATUS_BUFFER_OVERFLOW;
|
|
}
|
|
}
|
|
|
|
/* Fail */
|
|
return STATUS_NOT_FOUND;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrValidateBackPointer(IN PASSOCIATED_DEVICE_ENTRY AssociatedDeviceEntry,
|
|
IN PDEVICE_INFORMATION DeviceInformation,
|
|
OUT PBOOLEAN Invalid)
|
|
{
|
|
HANDLE Handle;
|
|
NTSTATUS Status;
|
|
PLIST_ENTRY SymlinksEntry;
|
|
IO_STATUS_BLOCK IoStatusBlock;
|
|
PREPARSE_DATA_BUFFER ReparseData;
|
|
OBJECT_ATTRIBUTES ObjectAttributes;
|
|
UNICODE_STRING FullName, SubstituteName;
|
|
PSYMLINK_INFORMATION SymlinkInformation;
|
|
|
|
/* Initialize & allocate a string big enough to contain our complete mount point name */
|
|
FullName.Length = 0;
|
|
FullName.MaximumLength = AssociatedDeviceEntry->String.Length
|
|
+ AssociatedDeviceEntry->DeviceInformation->DeviceName.Length
|
|
+ sizeof(WCHAR)
|
|
+ sizeof(UNICODE_NULL);
|
|
FullName.Buffer = AllocatePool(FullName.MaximumLength);
|
|
if (!FullName.Buffer)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Create the path */
|
|
RtlAppendUnicodeStringToString(&FullName, &AssociatedDeviceEntry->DeviceInformation->DeviceName);
|
|
FullName.Buffer[FullName.Length / sizeof(WCHAR)] = L'\\';
|
|
RtlAppendUnicodeStringToString(&FullName, &AssociatedDeviceEntry->String);
|
|
FullName.Buffer[FullName.Length / sizeof(WCHAR)] = UNICODE_NULL;
|
|
|
|
/* Open it to query the reparse point */
|
|
InitializeObjectAttributes(&ObjectAttributes,
|
|
&FullName,
|
|
OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
|
|
NULL,
|
|
NULL);
|
|
Status = ZwOpenFile(&Handle,
|
|
SYNCHRONIZE | FILE_READ_ATTRIBUTES,
|
|
&ObjectAttributes, &IoStatusBlock,
|
|
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
|
|
FILE_SYNCHRONOUS_IO_NONALERT | FILE_OPEN_REPARSE_POINT);
|
|
FreePool(FullName.Buffer);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
*Invalid = TRUE;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
/* Allocate a buffer big enough to read reparse data */
|
|
ReparseData = AllocatePool(MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
|
|
if (ReparseData == NULL)
|
|
{
|
|
ZwClose(Handle);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Query reparse data */
|
|
Status = ZwFsControlFile(Handle,
|
|
NULL, NULL, NULL,
|
|
&IoStatusBlock,
|
|
FSCTL_GET_REPARSE_POINT,
|
|
NULL, 0,
|
|
ReparseData, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
|
|
ZwClose(Handle);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(ReparseData);
|
|
*Invalid = TRUE;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
/* Create a string with the substitute name */
|
|
SubstituteName.Length = ReparseData->SymbolicLinkReparseBuffer.SubstituteNameLength;
|
|
SubstituteName.MaximumLength = SubstituteName.Length;
|
|
SubstituteName.Buffer = (PWSTR)((ULONG_PTR)ReparseData->SymbolicLinkReparseBuffer.PathBuffer + ReparseData->SymbolicLinkReparseBuffer.SubstituteNameOffset);
|
|
|
|
/* If that's a volume name that matches our associated device, that's a success! */
|
|
if (MOUNTMGR_IS_VOLUME_NAME(&SubstituteName))
|
|
{
|
|
if (SubstituteName.Length == 98 && SubstituteName.Buffer[1] == L'?')
|
|
{
|
|
for (SymlinksEntry = DeviceInformation->SymbolicLinksListHead.Flink;
|
|
SymlinksEntry != &(DeviceInformation->SymbolicLinksListHead);
|
|
SymlinksEntry = SymlinksEntry->Flink)
|
|
{
|
|
SymlinkInformation = CONTAINING_RECORD(SymlinksEntry, SYMLINK_INFORMATION, SymbolicLinksListEntry);
|
|
|
|
if (RtlEqualUnicodeString(&SubstituteName, &SymlinkInformation->Name, TRUE))
|
|
{
|
|
FreePool(ReparseData);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
FreePool(ReparseData);
|
|
*Invalid = TRUE;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrQueryVolumePaths(IN PDEVICE_EXTENSION DeviceExtension,
|
|
IN PDEVICE_INFORMATION DeviceInformation,
|
|
IN PLIST_ENTRY DeviceInfoList,
|
|
OUT PMOUNTMGR_VOLUME_PATHS * VolumePaths,
|
|
OUT PDEVICE_INFORMATION *FailedDevice)
|
|
{
|
|
ULONG Written;
|
|
NTSTATUS Status;
|
|
PLIST_ENTRY Entry;
|
|
PSYMLINK_INFORMATION SymlinkInformation;
|
|
PDEVICE_INFORMATION_ENTRY DeviceInfoEntry;
|
|
PASSOCIATED_DEVICE_ENTRY AssociatedDeviceEntry;
|
|
PMOUNTMGR_VOLUME_PATHS * Paths = NULL, * CurrentPath;
|
|
ULONG OutputPathLength, NumberOfPaths, ReturnedPaths;
|
|
|
|
/* We return at least null char */
|
|
OutputPathLength = sizeof(UNICODE_NULL);
|
|
|
|
for (Entry = DeviceInformation->SymbolicLinksListHead.Flink;
|
|
Entry != &(DeviceInformation->SymbolicLinksListHead);
|
|
Entry = Entry->Flink)
|
|
{
|
|
SymlinkInformation = CONTAINING_RECORD(Entry, SYMLINK_INFORMATION, SymbolicLinksListEntry);
|
|
|
|
/* Try to find the drive letter (ie, DOS device) */
|
|
if (MOUNTMGR_IS_DRIVE_LETTER(&SymlinkInformation->Name) && SymlinkInformation->Online)
|
|
{
|
|
/* We'll return the letter */
|
|
OutputPathLength = 4 * sizeof(WCHAR);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* We didn't find any */
|
|
if (Entry == &(DeviceInformation->SymbolicLinksListHead))
|
|
{
|
|
SymlinkInformation = NULL;
|
|
}
|
|
|
|
/* Do we have any device info to return? */
|
|
for (Entry = DeviceInfoList->Flink; Entry != DeviceInfoList; Entry = Entry->Flink)
|
|
{
|
|
DeviceInfoEntry = CONTAINING_RECORD(Entry, DEVICE_INFORMATION_ENTRY, DeviceInformationEntry);
|
|
|
|
/* Matching current device */
|
|
if (DeviceInfoEntry->DeviceInformation == DeviceInformation)
|
|
{
|
|
/* Allocate the output buffer */
|
|
*VolumePaths = AllocatePool(sizeof(ULONG) + OutputPathLength);
|
|
if (*VolumePaths == NULL)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Set size */
|
|
(*VolumePaths)->MultiSzLength = OutputPathLength;
|
|
/* If we have a drive letter, return it */
|
|
if (SymlinkInformation != NULL)
|
|
{
|
|
(*VolumePaths)->MultiSz[0] = SymlinkInformation->Name.Buffer[LETTER_POSITION];
|
|
(*VolumePaths)->MultiSz[1] = L':';
|
|
(*VolumePaths)->MultiSz[2] = UNICODE_NULL;
|
|
(*VolumePaths)->MultiSz[3] = UNICODE_NULL;
|
|
}
|
|
else
|
|
{
|
|
(*VolumePaths)->MultiSz[0] = UNICODE_NULL;
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
}
|
|
|
|
/* Allocate a new device entry */
|
|
DeviceInfoEntry = AllocatePool(sizeof(DEVICE_INFORMATION_ENTRY));
|
|
if (DeviceInfoEntry == NULL)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Add it to the list */
|
|
DeviceInfoEntry->DeviceInformation = DeviceInformation;
|
|
InsertTailList(DeviceInfoList, &DeviceInfoEntry->DeviceInformationEntry);
|
|
|
|
NumberOfPaths = 0;
|
|
/* Count the amount of devices we will have to handle */
|
|
if (!IsListEmpty(&DeviceInformation->AssociatedDevicesHead))
|
|
{
|
|
for (Entry = DeviceInformation->AssociatedDevicesHead.Flink;
|
|
Entry != &DeviceInformation->AssociatedDevicesHead;
|
|
Entry = Entry->Flink)
|
|
{
|
|
++NumberOfPaths;
|
|
}
|
|
|
|
ASSERT(NumberOfPaths != 0);
|
|
/* And allocate a big enough buffer */
|
|
Paths = AllocatePool(NumberOfPaths * sizeof(PMOUNTMGR_VOLUME_PATHS));
|
|
if (Paths == NULL)
|
|
{
|
|
RemoveEntryList(&DeviceInfoEntry->DeviceInformationEntry);
|
|
FreePool(DeviceInfoEntry);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
}
|
|
|
|
/* Start the hot loop to gather all the paths and be able to compute total output length! */
|
|
ReturnedPaths = 0;
|
|
CurrentPath = Paths;
|
|
for (Entry = DeviceInformation->AssociatedDevicesHead.Flink;
|
|
Entry != &DeviceInformation->AssociatedDevicesHead;
|
|
Entry = Entry->Flink)
|
|
{
|
|
USHORT InnerStrings;
|
|
BOOLEAN Invalid = FALSE;
|
|
|
|
AssociatedDeviceEntry = CONTAINING_RECORD(Entry, ASSOCIATED_DEVICE_ENTRY, AssociatedDevicesEntry);
|
|
|
|
/* Validate the fact its a mount point by query reparse data */
|
|
Status = MountMgrValidateBackPointer(AssociatedDeviceEntry, DeviceInformation, &Invalid);
|
|
|
|
/* If we found an invalid device, that's a failure */
|
|
if (Invalid)
|
|
{
|
|
*FailedDevice = AssociatedDeviceEntry->DeviceInformation;
|
|
Status = STATUS_UNSUCCESSFUL;
|
|
}
|
|
|
|
/* Check whether we failed, if so, bail out */
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
ULONG i;
|
|
|
|
for (i = 0; i < ReturnedPaths; ++i)
|
|
{
|
|
FreePool(Paths[i]);
|
|
}
|
|
|
|
if (Paths != NULL)
|
|
{
|
|
FreePool(Paths);
|
|
}
|
|
RemoveEntryList(&DeviceInfoEntry->DeviceInformationEntry);
|
|
FreePool(DeviceInfoEntry);
|
|
return Status;
|
|
}
|
|
|
|
/* Query associated paths (hello ourselves :-)) */
|
|
Status = MountMgrQueryVolumePaths(DeviceExtension,
|
|
AssociatedDeviceEntry->DeviceInformation,
|
|
DeviceInfoList,
|
|
CurrentPath,
|
|
FailedDevice);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
ULONG i;
|
|
|
|
for (i = 0; i < ReturnedPaths; ++i)
|
|
{
|
|
FreePool(Paths[i]);
|
|
}
|
|
|
|
if (Paths != NULL)
|
|
{
|
|
FreePool(Paths);
|
|
}
|
|
RemoveEntryList(&DeviceInfoEntry->DeviceInformationEntry);
|
|
FreePool(DeviceInfoEntry);
|
|
return Status;
|
|
}
|
|
|
|
/* Count the number of strings we have in the multi string buffer */
|
|
InnerStrings = 0;
|
|
if ((*CurrentPath)->MultiSzLength != sizeof(UNICODE_NULL))
|
|
{
|
|
ULONG i;
|
|
PWSTR MultiSz = (*CurrentPath)->MultiSz;
|
|
|
|
for (i = 0; i < (*CurrentPath)->MultiSzLength / sizeof(WCHAR); ++i, ++MultiSz)
|
|
{
|
|
if (*MultiSz == UNICODE_NULL)
|
|
{
|
|
++InnerStrings;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* We returned one more path (ie, one more allocated buffer) */
|
|
++ReturnedPaths;
|
|
/* Move the next pointer to use in the array */
|
|
++CurrentPath;
|
|
/* Multiply String.Length by the number of found paths, we always add it after a path */
|
|
OutputPathLength += (*CurrentPath)->MultiSzLength + InnerStrings * AssociatedDeviceEntry->String.Length - sizeof(UNICODE_NULL);
|
|
}
|
|
|
|
/* Allocate the output buffer */
|
|
*VolumePaths = AllocatePool(sizeof(ULONG) + OutputPathLength);
|
|
if (*VolumePaths == NULL)
|
|
{
|
|
ULONG i;
|
|
|
|
for (i = 0; i < ReturnedPaths; ++i)
|
|
{
|
|
FreePool(Paths[i]);
|
|
}
|
|
|
|
if (Paths != NULL)
|
|
{
|
|
FreePool(Paths);
|
|
}
|
|
RemoveEntryList(&DeviceInfoEntry->DeviceInformationEntry);
|
|
FreePool(DeviceInfoEntry);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
Written = 0;
|
|
/* If we had found a DOS letter, that's the first thing we return */
|
|
(*VolumePaths)->MultiSzLength = OutputPathLength;
|
|
if (SymlinkInformation != NULL)
|
|
{
|
|
(*VolumePaths)->MultiSz[0] = SymlinkInformation->Name.Buffer[LETTER_POSITION];
|
|
(*VolumePaths)->MultiSz[1] = L':';
|
|
(*VolumePaths)->MultiSz[2] = UNICODE_NULL;
|
|
Written = 3;
|
|
}
|
|
|
|
/* Now, browse again all our paths to return them */
|
|
CurrentPath = Paths;
|
|
for (Entry = DeviceInformation->AssociatedDevicesHead.Flink;
|
|
Entry != &DeviceInformation->AssociatedDevicesHead;
|
|
Entry = Entry->Flink)
|
|
{
|
|
AssociatedDeviceEntry = CONTAINING_RECORD(Entry, ASSOCIATED_DEVICE_ENTRY, AssociatedDevicesEntry);
|
|
|
|
/* If we had a path... */
|
|
if ((*CurrentPath)->MultiSzLength != sizeof(UNICODE_NULL))
|
|
{
|
|
ULONG i, Offset;
|
|
PWSTR MultiSz;
|
|
|
|
/* This offset is used to "jump" into MultiSz, so, start with the string begin (ie, skip MultiSzLength) */
|
|
Offset = sizeof(ULONG);
|
|
/* Browse every single letter, and skip last UNICODE_NULL */
|
|
for (i = 0; i < (*CurrentPath)->MultiSzLength / sizeof(WCHAR) - 1; ++i)
|
|
{
|
|
/* Get the letter */
|
|
MultiSz = (PWSTR)((ULONG_PTR)(*CurrentPath) + Offset);
|
|
/* If it was part of the path, just return it */
|
|
if (*MultiSz != UNICODE_NULL)
|
|
{
|
|
(*VolumePaths)->MultiSz[Written] = *MultiSz;
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, as planed, return our whole associated device name */
|
|
RtlCopyMemory(&(*VolumePaths)->MultiSz[Written],
|
|
AssociatedDeviceEntry->String.Buffer,
|
|
AssociatedDeviceEntry->String.Length);
|
|
Written += AssociatedDeviceEntry->String.Length / sizeof(WCHAR);
|
|
/* And don't forget to nullify */
|
|
(*VolumePaths)->MultiSz[Written] = UNICODE_NULL;
|
|
}
|
|
|
|
/* We at least return a letter or a null char */
|
|
++Written;
|
|
/* Move to the next letter */
|
|
Offset += sizeof(WCHAR);
|
|
}
|
|
}
|
|
|
|
FreePool(*CurrentPath);
|
|
++CurrentPath;
|
|
}
|
|
|
|
/* MultiSz: don't forget last null char */
|
|
(*VolumePaths)->MultiSz[Written] = UNICODE_NULL;
|
|
/* Cleanup everything and return success! */
|
|
if (Paths != NULL)
|
|
{
|
|
FreePool(Paths);
|
|
}
|
|
RemoveEntryList(&DeviceInfoEntry->DeviceInformationEntry);
|
|
FreePool(DeviceInfoEntry);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrQueryDosVolumePaths(IN PDEVICE_EXTENSION DeviceExtension,
|
|
IN PIRP Irp)
|
|
{
|
|
NTSTATUS Status;
|
|
PLIST_ENTRY Entry;
|
|
LIST_ENTRY Devices;
|
|
BOOLEAN NeedNotification;
|
|
PIO_STACK_LOCATION Stack;
|
|
UNICODE_STRING SymbolicName;
|
|
ULONG Attempts, OutputLength;
|
|
PMOUNTMGR_TARGET_NAME Target;
|
|
PMOUNTMGR_VOLUME_PATHS Paths, Output;
|
|
RECONCILE_WORK_ITEM_CONTEXT ReconcileContext;
|
|
PDEVICE_INFORMATION DeviceInformation, ListDeviceInfo, FailedDevice;
|
|
|
|
Stack = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
/* Validate input size */
|
|
if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_TARGET_NAME))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Ensure we have received UNICODE_STRING */
|
|
Target = (PMOUNTMGR_TARGET_NAME)Irp->AssociatedIrp.SystemBuffer;
|
|
if (Target->DeviceNameLength & 1)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Validate the entry structure size */
|
|
if (Target->DeviceNameLength + FIELD_OFFSET(MOUNTMGR_TARGET_NAME, DeviceName) > Stack->Parameters.DeviceIoControl.InputBufferLength)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Ensure we can at least return needed size */
|
|
if (Stack->Parameters.DeviceIoControl.OutputBufferLength < sizeof(ULONG))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Construct string for query */
|
|
SymbolicName.Length = Target->DeviceNameLength;
|
|
SymbolicName.MaximumLength = Target->DeviceNameLength + sizeof(UNICODE_NULL);
|
|
SymbolicName.Buffer = Target->DeviceName;
|
|
|
|
/* Find device with our info */
|
|
Status = FindDeviceInfo(DeviceExtension, &SymbolicName, FALSE, &DeviceInformation);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
return Status;
|
|
}
|
|
|
|
NeedNotification = FALSE;
|
|
Attempts = 0;
|
|
for (;;)
|
|
{
|
|
FailedDevice = NULL;
|
|
InitializeListHead(&Devices);
|
|
|
|
/* Query paths */
|
|
Status = MountMgrQueryVolumePaths(DeviceExtension, DeviceInformation, &Devices, &Paths, &FailedDevice);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
break;
|
|
}
|
|
|
|
/* If it failed for generic reason (memory, whatever), bail out (ie, FailedDevice not set) */
|
|
if (FailedDevice == NULL)
|
|
{
|
|
return Status;
|
|
}
|
|
|
|
/* If PnP, let's notify in case of success */
|
|
if (!DeviceInformation->ManuallyRegistered)
|
|
{
|
|
NeedNotification = TRUE;
|
|
}
|
|
|
|
/* Reconcile database */
|
|
ReconcileContext.DeviceExtension = DeviceExtension;
|
|
ReconcileContext.DeviceInformation = FailedDevice;
|
|
KeReleaseSemaphore(&DeviceExtension->DeviceLock, IO_NO_INCREMENT, 1, FALSE);
|
|
ReconcileThisDatabaseWithMasterWorker(&ReconcileContext);
|
|
KeWaitForSingleObject(&DeviceExtension->DeviceLock, Executive, KernelMode, FALSE, NULL);
|
|
|
|
/* Look for our device, to check it's online */
|
|
for (Entry = DeviceExtension->DeviceListHead.Flink;
|
|
Entry != &DeviceExtension->DeviceListHead;
|
|
Entry = Entry->Flink)
|
|
{
|
|
ListDeviceInfo = CONTAINING_RECORD(Entry, DEVICE_INFORMATION, DeviceListEntry);
|
|
/* It's online, it's OK! */
|
|
if (ListDeviceInfo == DeviceInformation)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* It's not online, it's not good */
|
|
if (Entry == &DeviceExtension->DeviceListHead)
|
|
{
|
|
return STATUS_OBJECT_NAME_NOT_FOUND;
|
|
}
|
|
|
|
/* Increase attempts count */
|
|
++Attempts;
|
|
/* Don't look forever and fail if we get out of attempts */
|
|
if (Attempts >= 1000)
|
|
{
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
/* We need to notify? Go ahead */
|
|
if (NeedNotification)
|
|
{
|
|
MountMgrNotifyNameChange(DeviceExtension, &SymbolicName, FALSE);
|
|
}
|
|
|
|
/* Get output buffer */
|
|
Output = (PMOUNTMGR_VOLUME_PATHS)Irp->AssociatedIrp.SystemBuffer;
|
|
|
|
/* Set required size */
|
|
Output->MultiSzLength = Paths->MultiSzLength;
|
|
|
|
/* Compute total length */
|
|
OutputLength = Output->MultiSzLength + sizeof(ULONG);
|
|
|
|
/* If it cannot fit, just return need size and quit */
|
|
if (OutputLength > Stack->Parameters.DeviceIoControl.OutputBufferLength)
|
|
{
|
|
Irp->IoStatus.Information = sizeof(ULONG);
|
|
FreePool(Paths);
|
|
return STATUS_BUFFER_OVERFLOW;
|
|
}
|
|
|
|
/* Copy data and quit */
|
|
Irp->IoStatus.Information = OutputLength;
|
|
RtlCopyMemory(Output->MultiSz, Paths->MultiSz, Output->MultiSzLength);
|
|
FreePool(Paths);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrKeepLinksWhenOffline(IN PDEVICE_EXTENSION DeviceExtension,
|
|
IN PIRP Irp)
|
|
{
|
|
NTSTATUS Status;
|
|
PIO_STACK_LOCATION Stack;
|
|
UNICODE_STRING SymbolicName;
|
|
PMOUNTMGR_TARGET_NAME Target;
|
|
PDEVICE_INFORMATION DeviceInformation;
|
|
|
|
Stack = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
/* Validate input */
|
|
if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_TARGET_NAME))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
Target = (PMOUNTMGR_TARGET_NAME)Irp->AssociatedIrp.SystemBuffer;
|
|
if (Target->DeviceNameLength + sizeof(USHORT) > Stack->Parameters.DeviceIoControl.InputBufferLength)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
SymbolicName.Length =
|
|
SymbolicName.MaximumLength = Target->DeviceNameLength;
|
|
SymbolicName.Buffer = Target->DeviceName;
|
|
|
|
/* Find the associated device */
|
|
Status = FindDeviceInfo(DeviceExtension, &SymbolicName, FALSE, &DeviceInformation);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
return Status;
|
|
}
|
|
|
|
/* Mark we want to keep links */
|
|
DeviceInformation->KeepLinks = TRUE;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrVolumeArrivalNotification(IN PDEVICE_EXTENSION DeviceExtension,
|
|
IN PIRP Irp)
|
|
{
|
|
NTSTATUS Status;
|
|
BOOLEAN OldState;
|
|
PIO_STACK_LOCATION Stack;
|
|
UNICODE_STRING SymbolicName;
|
|
PMOUNTMGR_TARGET_NAME Target;
|
|
|
|
Stack = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
/* Validate input */
|
|
if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_TARGET_NAME))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
Target = (PMOUNTMGR_TARGET_NAME)Irp->AssociatedIrp.SystemBuffer;
|
|
if (Target->DeviceNameLength + sizeof(USHORT) > Stack->Parameters.DeviceIoControl.InputBufferLength)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
SymbolicName.Length =
|
|
SymbolicName.MaximumLength = Target->DeviceNameLength;
|
|
SymbolicName.Buffer = Target->DeviceName;
|
|
|
|
/* Disable hard errors */
|
|
OldState = PsGetThreadHardErrorsAreDisabled(PsGetCurrentThread());
|
|
PsSetThreadHardErrorsAreDisabled(PsGetCurrentThread(), TRUE);
|
|
|
|
/* Call real worker */
|
|
Status = MountMgrMountedDeviceArrival(DeviceExtension, &SymbolicName, TRUE);
|
|
|
|
PsSetThreadHardErrorsAreDisabled(PsGetCurrentThread(), OldState);
|
|
|
|
return Status;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrQueryPoints(IN PDEVICE_EXTENSION DeviceExtension,
|
|
IN PIRP Irp)
|
|
{
|
|
NTSTATUS Status;
|
|
PIO_STACK_LOCATION Stack;
|
|
PMOUNTDEV_UNIQUE_ID UniqueId;
|
|
PMOUNTMGR_MOUNT_POINT MountPoint;
|
|
UNICODE_STRING SymbolicName, DeviceName;
|
|
|
|
Stack = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
/* Validate input... */
|
|
if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_MOUNT_POINT))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
MountPoint = (PMOUNTMGR_MOUNT_POINT)Irp->AssociatedIrp.SystemBuffer;
|
|
if (!MountPoint->SymbolicLinkNameLength)
|
|
{
|
|
MountPoint->SymbolicLinkNameOffset = 0;
|
|
}
|
|
|
|
if (!MountPoint->UniqueIdLength)
|
|
{
|
|
MountPoint->UniqueIdOffset = 0;
|
|
}
|
|
|
|
if (!MountPoint->DeviceNameLength)
|
|
{
|
|
MountPoint->DeviceNameOffset = 0;
|
|
}
|
|
|
|
/* Addresses can't be odd */
|
|
if ((MountPoint->SymbolicLinkNameOffset & 1) ||
|
|
(MountPoint->SymbolicLinkNameLength & 1))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if ((MountPoint->UniqueIdOffset & 1) ||
|
|
(MountPoint->UniqueIdLength & 1))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if ((MountPoint->DeviceNameOffset & 1) ||
|
|
(MountPoint->DeviceNameLength & 1))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* We can't go beyond */
|
|
if (((ULONG)MountPoint->SymbolicLinkNameLength + MountPoint->UniqueIdLength +
|
|
MountPoint->DeviceNameLength) > Stack->Parameters.DeviceIoControl.InputBufferLength)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (Stack->Parameters.DeviceIoControl.OutputBufferLength < sizeof(MOUNTMGR_MOUNT_POINTS))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* If caller provided a Symlink, use it */
|
|
if (MountPoint->SymbolicLinkNameLength != 0)
|
|
{
|
|
if (MountPoint->SymbolicLinkNameLength > MAXSHORT)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
SymbolicName.Length = MountPoint->SymbolicLinkNameLength;
|
|
SymbolicName.MaximumLength = MountPoint->SymbolicLinkNameLength + sizeof(WCHAR);
|
|
SymbolicName.Buffer = AllocatePool(SymbolicName.MaximumLength);
|
|
if (!SymbolicName.Buffer)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(SymbolicName.Buffer,
|
|
(PWSTR)((ULONG_PTR)MountPoint + MountPoint->SymbolicLinkNameOffset),
|
|
SymbolicName.Length);
|
|
SymbolicName.Buffer[SymbolicName.Length / sizeof(WCHAR)] = UNICODE_NULL;
|
|
|
|
/* Query links using it */
|
|
Status = QueryPointsFromSymbolicLinkName(DeviceExtension, &SymbolicName, Irp);
|
|
FreePool(SymbolicName.Buffer);
|
|
}
|
|
/* If user provided an unique ID */
|
|
else if (MountPoint->UniqueIdLength != 0)
|
|
{
|
|
UniqueId = AllocatePool(MountPoint->UniqueIdLength + sizeof(MOUNTDEV_UNIQUE_ID));
|
|
if (!UniqueId)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
UniqueId->UniqueIdLength = MountPoint->UniqueIdLength;
|
|
RtlCopyMemory(UniqueId->UniqueId,
|
|
(PVOID)((ULONG_PTR)MountPoint + MountPoint->UniqueIdOffset),
|
|
MountPoint->UniqueIdLength);
|
|
|
|
/* Query links using it */
|
|
Status = QueryPointsFromMemory(DeviceExtension, Irp, UniqueId, NULL);
|
|
FreePool(UniqueId);
|
|
}
|
|
/* If caller provided a device name */
|
|
else if (MountPoint->DeviceNameLength != 0)
|
|
{
|
|
if (MountPoint->DeviceNameLength > MAXSHORT)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
DeviceName.Length = MountPoint->DeviceNameLength;
|
|
DeviceName.MaximumLength = MountPoint->DeviceNameLength + sizeof(WCHAR);
|
|
DeviceName.Buffer = AllocatePool(DeviceName.MaximumLength);
|
|
if (!DeviceName.Buffer)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(DeviceName.Buffer,
|
|
(PWSTR)((ULONG_PTR)MountPoint + MountPoint->DeviceNameOffset),
|
|
DeviceName.Length);
|
|
DeviceName.Buffer[DeviceName.Length / sizeof(WCHAR)] = UNICODE_NULL;
|
|
|
|
/* Query links using it */
|
|
Status = QueryPointsFromMemory(DeviceExtension, Irp, NULL, &DeviceName);
|
|
FreePool(DeviceName.Buffer);
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, query all links */
|
|
Status = QueryPointsFromMemory(DeviceExtension, Irp, NULL, NULL);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrDeletePoints(IN PDEVICE_EXTENSION DeviceExtension,
|
|
IN PIRP Irp)
|
|
{
|
|
ULONG Link;
|
|
NTSTATUS Status;
|
|
BOOLEAN CreateNoDrive;
|
|
PIO_STACK_LOCATION Stack;
|
|
PMOUNTDEV_UNIQUE_ID UniqueId;
|
|
PMOUNTMGR_MOUNT_POINT MountPoint;
|
|
PMOUNTMGR_MOUNT_POINTS MountPoints;
|
|
UNICODE_STRING SymbolicName, DeviceName;
|
|
|
|
Stack = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
/* Validate input */
|
|
if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_MOUNT_POINT))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Query points */
|
|
MountPoint = (PMOUNTMGR_MOUNT_POINT)Irp->AssociatedIrp.SystemBuffer;
|
|
CreateNoDrive = (MountPoint->SymbolicLinkNameOffset && MountPoint->SymbolicLinkNameLength);
|
|
|
|
Status = MountMgrQueryPoints(DeviceExtension, Irp);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
return Status;
|
|
}
|
|
|
|
/* For all the points matching the request */
|
|
MountPoints = (PMOUNTMGR_MOUNT_POINTS)Irp->AssociatedIrp.SystemBuffer;
|
|
for (Link = 0; Link < MountPoints->NumberOfMountPoints; Link++)
|
|
{
|
|
SymbolicName.Length = MountPoints->MountPoints[Link].SymbolicLinkNameLength;
|
|
SymbolicName.MaximumLength = SymbolicName.Length + sizeof(WCHAR);
|
|
SymbolicName.Buffer = AllocatePool(SymbolicName.MaximumLength);
|
|
if (!SymbolicName.Buffer)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(SymbolicName.Buffer,
|
|
(PWSTR)((ULONG_PTR)MountPoints + MountPoints->MountPoints[Link].SymbolicLinkNameOffset),
|
|
SymbolicName.Length);
|
|
SymbolicName.Buffer[SymbolicName.Length / sizeof(WCHAR)] = UNICODE_NULL;
|
|
|
|
/* Create a no drive entry for the drive letters */
|
|
if (CreateNoDrive && IsDriveLetter(&SymbolicName))
|
|
{
|
|
UniqueId = AllocatePool(MountPoints->MountPoints[Link].UniqueIdLength + sizeof(MOUNTDEV_UNIQUE_ID));
|
|
if (UniqueId)
|
|
{
|
|
UniqueId->UniqueIdLength = MountPoints->MountPoints[Link].UniqueIdLength;
|
|
RtlCopyMemory(UniqueId->UniqueId,
|
|
(PMOUNTDEV_UNIQUE_ID)((ULONG_PTR)MountPoints + MountPoints->MountPoints[Link].UniqueIdOffset),
|
|
MountPoints->MountPoints[Link].UniqueIdLength);
|
|
|
|
CreateNoDriveLetterEntry(UniqueId);
|
|
FreePool(UniqueId);
|
|
}
|
|
}
|
|
|
|
/* If there are no link any more, and no need to create a no drive entry */
|
|
if (Link == 0 && !CreateNoDrive)
|
|
{
|
|
/* Then, delete everything */
|
|
UniqueId = AllocatePool(MountPoints->MountPoints[Link].UniqueIdLength);
|
|
if (UniqueId)
|
|
{
|
|
RtlCopyMemory(UniqueId,
|
|
(PMOUNTDEV_UNIQUE_ID)((ULONG_PTR)MountPoints + MountPoints->MountPoints[Link].UniqueIdOffset),
|
|
MountPoints->MountPoints[Link].UniqueIdLength);
|
|
|
|
DeleteNoDriveLetterEntry(UniqueId);
|
|
FreePool(UniqueId);
|
|
}
|
|
}
|
|
|
|
/* Delete all the information about the mount point */
|
|
GlobalDeleteSymbolicLink(&SymbolicName);
|
|
DeleteSymbolicLinkNameFromMemory(DeviceExtension, &SymbolicName, FALSE);
|
|
RtlDeleteRegistryValue(RTL_REGISTRY_ABSOLUTE, DatabasePath, SymbolicName.Buffer);
|
|
FreePool(SymbolicName.Buffer);
|
|
|
|
/* Notify the change */
|
|
DeviceName.Length = DeviceName.MaximumLength =
|
|
MountPoints->MountPoints[Link].DeviceNameLength;
|
|
DeviceName.Buffer = (PWSTR)((ULONG_PTR)MountPoints + MountPoints->MountPoints[Link].DeviceNameOffset);
|
|
MountMgrNotifyNameChange(DeviceExtension, &DeviceName, TRUE);
|
|
}
|
|
|
|
MountMgrNotify(DeviceExtension);
|
|
|
|
return Status;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrDeletePointsDbOnly(IN PDEVICE_EXTENSION DeviceExtension,
|
|
IN PIRP Irp)
|
|
{
|
|
ULONG Link;
|
|
NTSTATUS Status;
|
|
UNICODE_STRING SymbolicName;
|
|
PMOUNTDEV_UNIQUE_ID UniqueId;
|
|
PMOUNTMGR_MOUNT_POINTS MountPoints;
|
|
|
|
/* Query points */
|
|
Status = MountMgrQueryPoints(DeviceExtension, Irp);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
return Status;
|
|
}
|
|
|
|
MountPoints = (PMOUNTMGR_MOUNT_POINTS)Irp->AssociatedIrp.SystemBuffer;
|
|
if (MountPoints->NumberOfMountPoints == 0)
|
|
{
|
|
return Status;
|
|
}
|
|
|
|
/* For all the mount points */
|
|
for (Link = 0; Link < MountPoints->NumberOfMountPoints; Link++)
|
|
{
|
|
SymbolicName.Length = MountPoints->MountPoints[Link].SymbolicLinkNameLength;
|
|
SymbolicName.MaximumLength = SymbolicName.Length + sizeof(WCHAR);
|
|
SymbolicName.Buffer = AllocatePool(SymbolicName.MaximumLength);
|
|
if (!SymbolicName.Buffer)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(SymbolicName.Buffer,
|
|
(PWSTR)((ULONG_PTR)MountPoints + MountPoints->MountPoints[Link].SymbolicLinkNameOffset),
|
|
SymbolicName.Length);
|
|
SymbolicName.Buffer[SymbolicName.Length / sizeof(WCHAR)] = UNICODE_NULL;
|
|
|
|
/* If the only mount point is a drive letter, then create a no letter drive entry */
|
|
if (MountPoints->NumberOfMountPoints == 1 && IsDriveLetter(&SymbolicName))
|
|
{
|
|
UniqueId = AllocatePool(MountPoints->MountPoints[Link].UniqueIdLength + sizeof(MOUNTDEV_UNIQUE_ID));
|
|
if (UniqueId)
|
|
{
|
|
UniqueId->UniqueIdLength = MountPoints->MountPoints[Link].UniqueIdLength;
|
|
RtlCopyMemory(UniqueId->UniqueId,
|
|
(PMOUNTDEV_UNIQUE_ID)((ULONG_PTR)MountPoints + MountPoints->MountPoints[Link].UniqueIdOffset),
|
|
MountPoints->MountPoints[Link].UniqueIdLength);
|
|
|
|
CreateNoDriveLetterEntry(UniqueId);
|
|
FreePool(UniqueId);
|
|
}
|
|
}
|
|
|
|
/* Simply delete mount point from DB */
|
|
DeleteSymbolicLinkNameFromMemory(DeviceExtension, &SymbolicName, TRUE);
|
|
RtlDeleteRegistryValue(RTL_REGISTRY_ABSOLUTE, DatabasePath, SymbolicName.Buffer);
|
|
FreePool(SymbolicName.Buffer);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrVolumeMountPointChanged(IN PDEVICE_EXTENSION DeviceExtension,
|
|
IN PIRP Irp,
|
|
IN NTSTATUS LockStatus,
|
|
OUT PUNICODE_STRING SourceDeviceName,
|
|
OUT PUNICODE_STRING SourceSymbolicName,
|
|
OUT PUNICODE_STRING TargetVolumeName)
|
|
{
|
|
HANDLE Handle;
|
|
NTSTATUS Status;
|
|
PFILE_OBJECT FileObject;
|
|
PIO_STACK_LOCATION Stack;
|
|
ULONG Length, SavedLength;
|
|
BOOLEAN FOReferenced = FALSE;
|
|
IO_STATUS_BLOCK IoStatusBlock;
|
|
OBJECT_ATTRIBUTES ObjectAttributes;
|
|
PDEVICE_INFORMATION DeviceInformation;
|
|
OBJECT_NAME_INFORMATION ObjectNameInfo;
|
|
FILE_FS_DEVICE_INFORMATION FsDeviceInfo;
|
|
PFILE_NAME_INFORMATION FileNameInfo = NULL;
|
|
PMOUNTMGR_VOLUME_MOUNT_POINT VolumeMountPoint;
|
|
POBJECT_NAME_INFORMATION ObjectNameInfoPtr = NULL;
|
|
UNICODE_STRING SourceVolumeName, TargetDeviceName;
|
|
|
|
Stack = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
/* Validate input */
|
|
if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_VOLUME_MOUNT_POINT))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
VolumeMountPoint = (PMOUNTMGR_VOLUME_MOUNT_POINT)Irp->AssociatedIrp.SystemBuffer;
|
|
|
|
if (((ULONG)VolumeMountPoint->SourceVolumeNameLength + VolumeMountPoint->TargetVolumeNameLength) <
|
|
Stack->Parameters.DeviceIoControl.InputBufferLength)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Get source volume name */
|
|
SourceVolumeName.Length =
|
|
SourceVolumeName.MaximumLength = VolumeMountPoint->SourceVolumeNameLength;
|
|
SourceVolumeName.Buffer = (PWSTR)((ULONG_PTR)VolumeMountPoint + VolumeMountPoint->SourceVolumeNameOffset);
|
|
|
|
InitializeObjectAttributes(&ObjectAttributes,
|
|
&SourceVolumeName,
|
|
OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE,
|
|
NULL,
|
|
NULL);
|
|
|
|
/* Open it */
|
|
Status = ZwOpenFile(&Handle,
|
|
SYNCHRONIZE | FILE_READ_ATTRIBUTES,
|
|
&ObjectAttributes,
|
|
&IoStatusBlock,
|
|
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
|
|
FILE_SYNCHRONOUS_IO_NONALERT | FILE_OPEN_REPARSE_POINT);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
return Status;
|
|
}
|
|
|
|
TargetDeviceName.Buffer = NULL;
|
|
|
|
/* Query its attributes */
|
|
Status = ZwQueryVolumeInformationFile(Handle,
|
|
&IoStatusBlock,
|
|
&FsDeviceInfo,
|
|
sizeof(FsDeviceInfo),
|
|
FileFsDeviceInformation);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
if (FsDeviceInfo.DeviceType != FILE_DEVICE_DISK && FsDeviceInfo.DeviceType != FILE_DEVICE_VIRTUAL_DISK)
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
if (FsDeviceInfo.Characteristics != (FILE_REMOTE_DEVICE | FILE_REMOVABLE_MEDIA))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Reference it */
|
|
Status = ObReferenceObjectByHandle(Handle, 0, *IoFileObjectType, KernelMode, (PVOID *)&FileObject, NULL);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
FOReferenced = TRUE;
|
|
|
|
/* Get file name */
|
|
FileNameInfo = AllocatePool(sizeof(FILE_NAME_INFORMATION));
|
|
if (!FileNameInfo)
|
|
{
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto Cleanup;
|
|
}
|
|
|
|
Status = ZwQueryInformationFile(Handle, &IoStatusBlock, FileNameInfo,
|
|
sizeof(FILE_NAME_INFORMATION),
|
|
FileNameInformation);
|
|
if (Status == STATUS_BUFFER_OVERFLOW)
|
|
{
|
|
/* Now we have real length, use it */
|
|
Length = FileNameInfo->FileNameLength;
|
|
FreePool(FileNameInfo);
|
|
|
|
FileNameInfo = AllocatePool(sizeof(FILE_NAME_INFORMATION) + Length);
|
|
if (!FileNameInfo)
|
|
{
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Really query file name */
|
|
Status = ZwQueryInformationFile(Handle, &IoStatusBlock, FileNameInfo,
|
|
sizeof(FILE_NAME_INFORMATION) + Length,
|
|
FileNameInformation);
|
|
}
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Get symbolic name */
|
|
ObjectNameInfoPtr = &ObjectNameInfo;
|
|
SavedLength = sizeof(OBJECT_NAME_INFORMATION);
|
|
Status = ObQueryNameString(FileObject->DeviceObject, ObjectNameInfoPtr, sizeof(OBJECT_NAME_INFORMATION), &Length);
|
|
if (Status == STATUS_INFO_LENGTH_MISMATCH)
|
|
{
|
|
/* Once again, with proper size, it works better */
|
|
ObjectNameInfoPtr = AllocatePool(Length);
|
|
if (!ObjectNameInfoPtr)
|
|
{
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto Cleanup;
|
|
}
|
|
|
|
SavedLength = Length;
|
|
Status = ObQueryNameString(FileObject->DeviceObject, ObjectNameInfoPtr, SavedLength, &Length);
|
|
}
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Now, query the device name */
|
|
Status = QueryDeviceInformation(&ObjectNameInfoPtr->Name, SourceDeviceName,
|
|
NULL, NULL, NULL, NULL, NULL, NULL);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* For target volume name, use input */
|
|
TargetVolumeName->Length =
|
|
TargetVolumeName->MaximumLength = VolumeMountPoint->TargetVolumeNameLength;
|
|
TargetVolumeName->Buffer = (PWSTR)((ULONG_PTR)VolumeMountPoint + VolumeMountPoint->TargetVolumeNameOffset);
|
|
|
|
/* Query its device name */
|
|
Status = QueryDeviceInformation(TargetVolumeName, &TargetDeviceName,
|
|
NULL, NULL, NULL, NULL, NULL, NULL);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Return symbolic name */
|
|
SourceSymbolicName->Length =
|
|
SourceSymbolicName->MaximumLength = (USHORT)FileNameInfo->FileNameLength;
|
|
SourceSymbolicName->Buffer = (PWSTR)FileNameInfo;
|
|
/* memmove allows memory overlap */
|
|
RtlMoveMemory(SourceSymbolicName->Buffer, FileNameInfo->FileName, SourceSymbolicName->Length);
|
|
FileNameInfo = NULL;
|
|
|
|
/* Notify the change */
|
|
MountMgrNotify(DeviceExtension);
|
|
MountMgrNotifyNameChange(DeviceExtension, &TargetDeviceName, TRUE);
|
|
|
|
/* If we are locked, sync databases if possible */
|
|
if (NT_SUCCESS(LockStatus))
|
|
{
|
|
Status = FindDeviceInfo(DeviceExtension, SourceDeviceName, FALSE, &DeviceInformation);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
ReconcileThisDatabaseWithMaster(DeviceExtension, DeviceInformation);
|
|
}
|
|
else
|
|
{
|
|
Status = STATUS_PENDING;
|
|
}
|
|
}
|
|
|
|
Cleanup:
|
|
if (TargetDeviceName.Buffer)
|
|
{
|
|
FreePool(TargetDeviceName.Buffer);
|
|
}
|
|
|
|
if (ObjectNameInfoPtr && ObjectNameInfoPtr != &ObjectNameInfo)
|
|
{
|
|
FreePool(ObjectNameInfoPtr);
|
|
}
|
|
|
|
if (FileNameInfo)
|
|
{
|
|
FreePool(FileNameInfo);
|
|
}
|
|
|
|
if (FOReferenced)
|
|
{
|
|
ObDereferenceObject(FileObject);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrVolumeMountPointCreated(IN PDEVICE_EXTENSION DeviceExtension,
|
|
IN PIRP Irp,
|
|
IN NTSTATUS LockStatus)
|
|
{
|
|
LONG Offset;
|
|
BOOLEAN Found;
|
|
NTSTATUS Status;
|
|
HANDLE RemoteDatabase;
|
|
PMOUNTDEV_UNIQUE_ID UniqueId;
|
|
PDATABASE_ENTRY DatabaseEntry;
|
|
PASSOCIATED_DEVICE_ENTRY AssociatedEntry;
|
|
PDEVICE_INFORMATION DeviceInformation, TargetDeviceInformation;
|
|
UNICODE_STRING LinkTarget, SourceDeviceName, SourceSymbolicName, TargetVolumeName, VolumeName, DbName;
|
|
|
|
/* Initialize string */
|
|
LinkTarget.Length = 0;
|
|
LinkTarget.MaximumLength = 0xC8;
|
|
LinkTarget.Buffer = AllocatePool(LinkTarget.MaximumLength);
|
|
if (LinkTarget.Buffer == NULL)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* If the mount point was created, then, it changed!
|
|
* Also use it to query some information
|
|
*/
|
|
Status = MountMgrVolumeMountPointChanged(DeviceExtension, Irp, LockStatus, &SourceDeviceName, &SourceSymbolicName, &TargetVolumeName);
|
|
/* Pending means DB are under synchronization, bail out */
|
|
if (Status == STATUS_PENDING)
|
|
{
|
|
FreePool(LinkTarget.Buffer);
|
|
FreePool(SourceDeviceName.Buffer);
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
else if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(LinkTarget.Buffer);
|
|
return Status;
|
|
}
|
|
|
|
/* Query the device information */
|
|
Status = FindDeviceInfo(DeviceExtension, &SourceDeviceName, FALSE, &DeviceInformation);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* If it failed, first try to get volume name */
|
|
Status = QueryVolumeName(0, NULL, &SourceDeviceName, &LinkTarget, &VolumeName);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* Then, try to read the symlink */
|
|
Status = MountMgrQuerySymbolicLink(&SourceDeviceName, &LinkTarget);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(LinkTarget.Buffer);
|
|
FreePool(SourceDeviceName.Buffer);
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return Status;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
FreePool(VolumeName.Buffer);
|
|
}
|
|
|
|
FreePool(SourceDeviceName.Buffer);
|
|
|
|
SourceDeviceName.Length = LinkTarget.Length;
|
|
SourceDeviceName.MaximumLength = LinkTarget.MaximumLength;
|
|
SourceDeviceName.Buffer = LinkTarget.Buffer;
|
|
|
|
/* Now that we have the correct source, reattempt to query information */
|
|
Status = FindDeviceInfo(DeviceExtension, &SourceDeviceName, FALSE, &DeviceInformation);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(SourceDeviceName.Buffer);
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
FreePool(SourceDeviceName.Buffer);
|
|
|
|
/* Get information about target device */
|
|
Status = FindDeviceInfo(DeviceExtension, &TargetVolumeName, FALSE, &TargetDeviceInformation);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return Status;
|
|
}
|
|
|
|
/* Notify if not disabled */
|
|
if (!TargetDeviceInformation->SkipNotifications)
|
|
{
|
|
PostOnlineNotification(DeviceExtension, &TargetDeviceInformation->SymbolicName);
|
|
}
|
|
|
|
/* Open the remote database */
|
|
RemoteDatabase = OpenRemoteDatabase(DeviceInformation, TRUE);
|
|
if (RemoteDatabase == 0)
|
|
{
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Browse all the entries */
|
|
Offset = 0;
|
|
Found = FALSE;
|
|
for (;;)
|
|
{
|
|
DatabaseEntry = GetRemoteDatabaseEntry(RemoteDatabase, Offset);
|
|
if (DatabaseEntry == NULL)
|
|
{
|
|
break;
|
|
}
|
|
|
|
/* Try to find ourselves */
|
|
DbName.MaximumLength = DatabaseEntry->SymbolicNameLength;
|
|
DbName.Length = DbName.MaximumLength;
|
|
DbName.Buffer = (PWSTR)((ULONG_PTR)DatabaseEntry + DatabaseEntry->SymbolicNameOffset);
|
|
if (RtlEqualUnicodeString(&TargetVolumeName, &DbName, TRUE))
|
|
{
|
|
/* Reference ourselves and update the entry */
|
|
++DatabaseEntry->EntryReferences;
|
|
Status = WriteRemoteDatabaseEntry(RemoteDatabase, Offset, DatabaseEntry);
|
|
FreePool(DatabaseEntry);
|
|
Found = TRUE;
|
|
break;
|
|
}
|
|
|
|
Offset += DatabaseEntry->EntrySize;
|
|
FreePool(DatabaseEntry);
|
|
}
|
|
|
|
/* We couldn't find ourselves, we'll have to add ourselves */
|
|
if (!Found)
|
|
{
|
|
ULONG EntrySize;
|
|
PUNIQUE_ID_REPLICATE UniqueIdReplicate;
|
|
|
|
/* Query the device unique ID */
|
|
Status = QueryDeviceInformation(&TargetVolumeName, NULL, &UniqueId, NULL, NULL, NULL, NULL, NULL);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
CloseRemoteDatabase(RemoteDatabase);
|
|
return Status;
|
|
}
|
|
|
|
/* Allocate a database entry */
|
|
EntrySize = UniqueId->UniqueIdLength + TargetVolumeName.Length + sizeof(DATABASE_ENTRY);
|
|
DatabaseEntry = AllocatePool(EntrySize);
|
|
if (DatabaseEntry == NULL)
|
|
{
|
|
FreePool(UniqueId);
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
CloseRemoteDatabase(RemoteDatabase);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Fill it in */
|
|
DatabaseEntry->EntrySize = EntrySize;
|
|
DatabaseEntry->EntryReferences = 1;
|
|
DatabaseEntry->SymbolicNameOffset = sizeof(DATABASE_ENTRY);
|
|
DatabaseEntry->SymbolicNameLength = TargetVolumeName.Length;
|
|
DatabaseEntry->UniqueIdOffset = TargetVolumeName.Length + sizeof(DATABASE_ENTRY);
|
|
DatabaseEntry->UniqueIdLength = UniqueId->UniqueIdLength;
|
|
RtlCopyMemory((PVOID)((ULONG_PTR)DatabaseEntry + sizeof(DATABASE_ENTRY)), TargetVolumeName.Buffer, DatabaseEntry->SymbolicNameLength);
|
|
RtlCopyMemory((PVOID)((ULONG_PTR)DatabaseEntry + DatabaseEntry->UniqueIdOffset), UniqueId->UniqueId, UniqueId->UniqueIdLength);
|
|
|
|
/* And write it down */
|
|
Status = AddRemoteDatabaseEntry(RemoteDatabase, DatabaseEntry);
|
|
FreePool(DatabaseEntry);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(UniqueId);
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
CloseRemoteDatabase(RemoteDatabase);
|
|
return Status;
|
|
}
|
|
|
|
/* And now, allocate an Unique ID item */
|
|
UniqueIdReplicate = AllocatePool(sizeof(UNIQUE_ID_REPLICATE));
|
|
if (UniqueIdReplicate == NULL)
|
|
{
|
|
FreePool(UniqueId);
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
CloseRemoteDatabase(RemoteDatabase);
|
|
return Status;
|
|
}
|
|
|
|
/* To associate it with the device */
|
|
UniqueIdReplicate->UniqueId = UniqueId;
|
|
InsertTailList(&DeviceInformation->ReplicatedUniqueIdsListHead, &UniqueIdReplicate->ReplicatedUniqueIdsListEntry);
|
|
}
|
|
|
|
/* We're done with the remote database */
|
|
CloseRemoteDatabase(RemoteDatabase);
|
|
|
|
/* Check we were find writing the entry */
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return Status;
|
|
}
|
|
|
|
/* This is the end, allocate an associated entry */
|
|
AssociatedEntry = AllocatePool(sizeof(ASSOCIATED_DEVICE_ENTRY));
|
|
if (AssociatedEntry == NULL)
|
|
{
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Initialize its source name string */
|
|
AssociatedEntry->String.Length = SourceSymbolicName.Length;
|
|
AssociatedEntry->String.MaximumLength = AssociatedEntry->String.Length + sizeof(UNICODE_NULL);
|
|
AssociatedEntry->String.Buffer = AllocatePool(AssociatedEntry->String.MaximumLength);
|
|
if (AssociatedEntry->String.Buffer == NULL)
|
|
{
|
|
FreePool(AssociatedEntry);
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Copy data & insert in list */
|
|
RtlCopyMemory(AssociatedEntry->String.Buffer, SourceSymbolicName.Buffer, SourceSymbolicName.Length);
|
|
AssociatedEntry->String.Buffer[SourceSymbolicName.Length / sizeof(WCHAR)] = UNICODE_NULL;
|
|
AssociatedEntry->DeviceInformation = DeviceInformation;
|
|
InsertTailList(&TargetDeviceInformation->AssociatedDevicesHead, &AssociatedEntry->AssociatedDevicesEntry);
|
|
|
|
/* We're done! */
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
MountMgrVolumeMountPointDeleted(IN PDEVICE_EXTENSION DeviceExtension,
|
|
IN PIRP Irp,
|
|
IN NTSTATUS LockStatus)
|
|
{
|
|
LONG Offset;
|
|
NTSTATUS Status;
|
|
PLIST_ENTRY Entry;
|
|
HANDLE RemoteDatabase;
|
|
PDATABASE_ENTRY DatabaseEntry;
|
|
PUNIQUE_ID_REPLICATE UniqueIdReplicate;
|
|
PASSOCIATED_DEVICE_ENTRY AssociatedEntry;
|
|
PDEVICE_INFORMATION DeviceInformation, TargetDeviceInformation;
|
|
UNICODE_STRING LinkTarget, SourceDeviceName, SourceSymbolicName, TargetVolumeName, VolumeName, DbName;
|
|
|
|
/* Initialize string */
|
|
LinkTarget.Length = 0;
|
|
LinkTarget.MaximumLength = 0xC8;
|
|
LinkTarget.Buffer = AllocatePool(LinkTarget.MaximumLength);
|
|
if (LinkTarget.Buffer == NULL)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* If the mount point was deleted, then, it changed!
|
|
* Also use it to query some information
|
|
*/
|
|
Status = MountMgrVolumeMountPointChanged(DeviceExtension, Irp, LockStatus, &SourceDeviceName, &SourceSymbolicName, &TargetVolumeName);
|
|
/* Pending means DB are under synchronization, bail out */
|
|
if (Status == STATUS_PENDING)
|
|
{
|
|
FreePool(LinkTarget.Buffer);
|
|
FreePool(SourceDeviceName.Buffer);
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
else if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(LinkTarget.Buffer);
|
|
return Status;
|
|
}
|
|
|
|
/* Query the device information */
|
|
Status = FindDeviceInfo(DeviceExtension, &SourceDeviceName, FALSE, &DeviceInformation);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* If it failed, first try to get volume name */
|
|
Status = QueryVolumeName(0, NULL, &SourceDeviceName, &LinkTarget, &VolumeName);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* Then, try to read the symlink */
|
|
Status = MountMgrQuerySymbolicLink(&SourceDeviceName, &LinkTarget);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(LinkTarget.Buffer);
|
|
FreePool(SourceDeviceName.Buffer);
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return Status;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
FreePool(VolumeName.Buffer);
|
|
}
|
|
|
|
FreePool(SourceDeviceName.Buffer);
|
|
|
|
SourceDeviceName.Length = LinkTarget.Length;
|
|
SourceDeviceName.MaximumLength = LinkTarget.MaximumLength;
|
|
SourceDeviceName.Buffer = LinkTarget.Buffer;
|
|
|
|
/* Now that we have the correct source, reattempt to query information */
|
|
Status = FindDeviceInfo(DeviceExtension, &SourceDeviceName, FALSE, &DeviceInformation);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(SourceDeviceName.Buffer);
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
FreePool(SourceDeviceName.Buffer);
|
|
|
|
/* Get information about target device */
|
|
Status = FindDeviceInfo(DeviceExtension, &TargetVolumeName, FALSE, &TargetDeviceInformation);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return Status;
|
|
}
|
|
|
|
/* Open the remote database */
|
|
RemoteDatabase = OpenRemoteDatabase(DeviceInformation, TRUE);
|
|
if (RemoteDatabase == 0)
|
|
{
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Browse all the entries */
|
|
Offset = 0;
|
|
for (;;)
|
|
{
|
|
DatabaseEntry = GetRemoteDatabaseEntry(RemoteDatabase, Offset);
|
|
if (DatabaseEntry == NULL)
|
|
{
|
|
/* We didn't find ourselves, that's infortunate! */
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
CloseRemoteDatabase(RemoteDatabase);
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Try to find ourselves */
|
|
DbName.MaximumLength = DatabaseEntry->SymbolicNameLength;
|
|
DbName.Length = DbName.MaximumLength;
|
|
DbName.Buffer = (PWSTR)((ULONG_PTR)DatabaseEntry + DatabaseEntry->SymbolicNameOffset);
|
|
if (RtlEqualUnicodeString(&TargetVolumeName, &DbName, TRUE))
|
|
{
|
|
break;
|
|
}
|
|
|
|
Offset += DatabaseEntry->EntrySize;
|
|
FreePool(DatabaseEntry);
|
|
}
|
|
|
|
/* Dereference ourselves */
|
|
DatabaseEntry->EntryReferences--;
|
|
if (DatabaseEntry->EntryReferences == 0)
|
|
{
|
|
/* If we're still referenced, just update the entry */
|
|
Status = WriteRemoteDatabaseEntry(RemoteDatabase, Offset, DatabaseEntry);
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, delete the entry */
|
|
Status = DeleteRemoteDatabaseEntry(RemoteDatabase, Offset);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(DatabaseEntry);
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
CloseRemoteDatabase(RemoteDatabase);
|
|
return Status;
|
|
}
|
|
|
|
/* Also, delete our unique ID replicated record */
|
|
for (Entry = DeviceInformation->ReplicatedUniqueIdsListHead.Flink;
|
|
Entry != &DeviceInformation->ReplicatedUniqueIdsListHead;
|
|
Entry = Entry->Flink)
|
|
{
|
|
UniqueIdReplicate = CONTAINING_RECORD(Entry, UNIQUE_ID_REPLICATE, ReplicatedUniqueIdsListEntry);
|
|
|
|
if (UniqueIdReplicate->UniqueId->UniqueIdLength == DatabaseEntry->UniqueIdLength &&
|
|
RtlCompareMemory(UniqueIdReplicate->UniqueId->UniqueId,
|
|
(PVOID)((ULONG_PTR)DatabaseEntry + DatabaseEntry->UniqueIdOffset),
|
|
DatabaseEntry->UniqueIdLength) == DatabaseEntry->UniqueIdLength)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* It has to exist! */
|
|
if (Entry == &DeviceInformation->ReplicatedUniqueIdsListHead)
|
|
{
|
|
FreePool(DatabaseEntry);
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
CloseRemoteDatabase(RemoteDatabase);
|
|
return STATUS_UNSUCCESSFUL;
|
|
}
|
|
|
|
/* Remove it and free it */
|
|
RemoveEntryList(&UniqueIdReplicate->ReplicatedUniqueIdsListEntry);
|
|
FreePool(UniqueIdReplicate->UniqueId);
|
|
FreePool(UniqueIdReplicate);
|
|
}
|
|
|
|
/* We're done with the remote database */
|
|
FreePool(DatabaseEntry);
|
|
CloseRemoteDatabase(RemoteDatabase);
|
|
|
|
/* Check write operation succeed */
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return Status;
|
|
}
|
|
|
|
/* Try to find our associated device entry */
|
|
for (Entry = TargetDeviceInformation->AssociatedDevicesHead.Flink;
|
|
Entry != &TargetDeviceInformation->AssociatedDevicesHead;
|
|
Entry = Entry->Flink)
|
|
{
|
|
AssociatedEntry = CONTAINING_RECORD(Entry, ASSOCIATED_DEVICE_ENTRY, AssociatedDevicesEntry);
|
|
|
|
/* If found, delete it */
|
|
if (AssociatedEntry->DeviceInformation == DeviceInformation &&
|
|
RtlEqualUnicodeString(&AssociatedEntry->String, &SourceSymbolicName, TRUE))
|
|
{
|
|
RemoveEntryList(&AssociatedEntry->AssociatedDevicesEntry);
|
|
FreePool(AssociatedEntry->String.Buffer);
|
|
FreePool(AssociatedEntry);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* We're done! */
|
|
FreePool(SourceSymbolicName.Buffer);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
NTAPI
|
|
MountMgrDeviceControl(IN PDEVICE_OBJECT DeviceObject,
|
|
IN PIRP Irp)
|
|
{
|
|
PIO_STACK_LOCATION Stack;
|
|
NTSTATUS Status, LockStatus;
|
|
PDEVICE_EXTENSION DeviceExtension;
|
|
|
|
Stack = IoGetCurrentIrpStackLocation(Irp);
|
|
DeviceExtension = DeviceObject->DeviceExtension;
|
|
|
|
KeWaitForSingleObject(&(DeviceExtension->DeviceLock), Executive, KernelMode, FALSE, NULL);
|
|
|
|
switch (Stack->Parameters.DeviceIoControl.IoControlCode)
|
|
{
|
|
case IOCTL_MOUNTMGR_CREATE_POINT:
|
|
Status = MountMgrCreatePoint(DeviceExtension, Irp);
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_DELETE_POINTS:
|
|
Status = MountMgrDeletePoints(DeviceExtension, Irp);
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_QUERY_POINTS:
|
|
Status = MountMgrQueryPoints(DeviceExtension, Irp);
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_DELETE_POINTS_DBONLY:
|
|
Status = MountMgrDeletePointsDbOnly(DeviceExtension, Irp);
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_NEXT_DRIVE_LETTER:
|
|
Status = MountMgrNextDriveLetter(DeviceExtension, Irp);
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_AUTO_DL_ASSIGNMENTS:
|
|
DeviceExtension->AutomaticDriveLetter = TRUE;
|
|
Status = STATUS_SUCCESS;
|
|
|
|
MountMgrAssignDriveLetters(DeviceExtension);
|
|
ReconcileAllDatabasesWithMaster(DeviceExtension);
|
|
WaitForOnlinesToComplete(DeviceExtension);
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_VOLUME_MOUNT_POINT_CREATED:
|
|
KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT, 1, FALSE);
|
|
|
|
LockStatus = WaitForRemoteDatabaseSemaphore(DeviceExtension);
|
|
KeWaitForSingleObject(&(DeviceExtension->DeviceLock), Executive, KernelMode, FALSE, NULL);
|
|
Status = MountMgrVolumeMountPointCreated(DeviceExtension, Irp, LockStatus);
|
|
if (NT_SUCCESS(LockStatus))
|
|
{
|
|
ReleaseRemoteDatabaseSemaphore(DeviceExtension);
|
|
}
|
|
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_VOLUME_MOUNT_POINT_DELETED:
|
|
KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT, 1, FALSE);
|
|
|
|
LockStatus = WaitForRemoteDatabaseSemaphore(DeviceExtension);
|
|
KeWaitForSingleObject(&(DeviceExtension->DeviceLock), Executive, KernelMode, FALSE, NULL);
|
|
Status = MountMgrVolumeMountPointDeleted(DeviceExtension, Irp, LockStatus);
|
|
if (NT_SUCCESS(LockStatus))
|
|
{
|
|
ReleaseRemoteDatabaseSemaphore(DeviceExtension);
|
|
}
|
|
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_CHANGE_NOTIFY:
|
|
Status = MountMgrChangeNotify(DeviceExtension, Irp);
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_KEEP_LINKS_WHEN_OFFLINE:
|
|
Status = MountMgrKeepLinksWhenOffline(DeviceExtension, Irp);
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_CHECK_UNPROCESSED_VOLUMES:
|
|
Status = MountMgrCheckUnprocessedVolumes(DeviceExtension, Irp);
|
|
goto Complete;
|
|
|
|
case IOCTL_MOUNTMGR_VOLUME_ARRIVAL_NOTIFICATION:
|
|
KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT, 1, FALSE);
|
|
Status = MountMgrVolumeArrivalNotification(DeviceExtension, Irp);
|
|
goto Complete;
|
|
|
|
case IOCTL_MOUNTMGR_QUERY_DOS_VOLUME_PATH:
|
|
Status = MountMgrQueryDosVolumePath(DeviceExtension, Irp);
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_QUERY_DOS_VOLUME_PATHS:
|
|
Status = MountMgrQueryDosVolumePaths(DeviceExtension, Irp);
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_SCRUB_REGISTRY:
|
|
Status = MountMgrScrubRegistry(DeviceExtension);
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_QUERY_AUTO_MOUNT:
|
|
Status = MountMgrQueryAutoMount(DeviceExtension, Irp);
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_SET_AUTO_MOUNT:
|
|
Status = MountMgrSetAutoMount(DeviceExtension, Irp);
|
|
break;
|
|
|
|
case IOCTL_MOUNTMGR_DEFINE_UNIX_DRIVE:
|
|
case IOCTL_MOUNTMGR_QUERY_UNIX_DRIVE:
|
|
DPRINT1("Winism! Rewrite the caller!\n");
|
|
default:
|
|
Status = STATUS_INVALID_DEVICE_REQUEST;
|
|
}
|
|
|
|
KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT, 1, FALSE);
|
|
|
|
if (Status != STATUS_PENDING)
|
|
{
|
|
goto Complete;
|
|
}
|
|
|
|
return Status;
|
|
|
|
Complete:
|
|
Irp->IoStatus.Status = Status;
|
|
IoCompleteRequest(Irp, IO_NO_INCREMENT);
|
|
|
|
return Status;
|
|
}
|