mirror of
https://github.com/reactos/reactos.git
synced 2024-10-30 19:41:57 +00:00
2351 lines
80 KiB
C
2351 lines
80 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: ntoskrnl/fstub/disksup.c
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* PURPOSE: I/O HAL Routines for Disk Access
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* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
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* Eric Kohl
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* Casper S. Hornstrup (chorns@users.sourceforge.net)
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*/
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/* INCLUDES ******************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <debug.h>
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#include <internal/hal.h>
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/* DEPRECATED FUNCTIONS ******************************************************/
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#if 1
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const WCHAR DiskMountString[] = L"\\DosDevices\\%C:";
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#define AUTO_DRIVE MAXULONG
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#define PARTITION_MAGIC 0xaa55
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#include <pshpack1.h>
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typedef struct _REG_DISK_MOUNT_INFO
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{
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ULONG Signature;
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LARGE_INTEGER StartingOffset;
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} REG_DISK_MOUNT_INFO, *PREG_DISK_MOUNT_INFO;
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#include <poppack.h>
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typedef enum _DISK_MANAGER
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{
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NoDiskManager,
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OntrackDiskManager,
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EZ_Drive
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} DISK_MANAGER;
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static BOOLEAN
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HalpAssignDrive(IN PUNICODE_STRING PartitionName,
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IN ULONG DriveNumber,
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IN UCHAR DriveType,
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IN ULONG Signature,
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IN LARGE_INTEGER StartingOffset,
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IN HANDLE hKey,
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IN PUNICODE_STRING BootDevice,
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OUT PUCHAR NtSystemPath)
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{
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WCHAR DriveNameBuffer[16];
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UNICODE_STRING DriveName;
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ULONG i;
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NTSTATUS Status;
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REG_DISK_MOUNT_INFO DiskMountInfo;
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DPRINT("HalpAssignDrive()\n");
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if ((DriveNumber != AUTO_DRIVE) && (DriveNumber < 26))
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{
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/* Force assignment */
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if ((ObSystemDeviceMap->DriveMap & (1 << DriveNumber)) != 0)
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{
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DbgPrint("Drive letter already used!\n");
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return FALSE;
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}
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}
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else
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{
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/* Automatic assignment */
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DriveNumber = AUTO_DRIVE;
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for (i = 2; i < 26; i++)
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{
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if ((ObSystemDeviceMap->DriveMap & (1 << i)) == 0)
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{
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DriveNumber = i;
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break;
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}
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}
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if (DriveNumber == AUTO_DRIVE)
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{
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DbgPrint("No drive letter available!\n");
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return FALSE;
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}
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}
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DPRINT("DriveNumber %d\n", DriveNumber);
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/* Update the System Device Map */
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ObSystemDeviceMap->DriveMap |= (1 << DriveNumber);
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ObSystemDeviceMap->DriveType[DriveNumber] = DriveType;
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/* Build drive name */
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swprintf(DriveNameBuffer,
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L"\\??\\%C:",
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'A' + DriveNumber);
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RtlInitUnicodeString(&DriveName,
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DriveNameBuffer);
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DPRINT(" %wZ ==> %wZ\n",
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&DriveName,
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PartitionName);
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/* Create symbolic link */
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Status = IoCreateSymbolicLink(&DriveName,
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PartitionName);
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if (hKey &&
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DriveType == DOSDEVICE_DRIVE_FIXED &&
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Signature)
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{
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DiskMountInfo.Signature = Signature;
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DiskMountInfo.StartingOffset = StartingOffset;
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swprintf(DriveNameBuffer, DiskMountString, L'A' + DriveNumber);
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RtlInitUnicodeString(&DriveName, DriveNameBuffer);
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Status = ZwSetValueKey(hKey,
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&DriveName,
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0,
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REG_BINARY,
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&DiskMountInfo,
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sizeof(DiskMountInfo));
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("ZwCreateValueKey failed for %wZ, status=%x\n", &DriveName, Status);
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}
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}
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/* Check if this is a boot partition */
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if (RtlCompareUnicodeString(PartitionName, BootDevice, FALSE) == 0)
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{
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/* Set NtSystemPath to that partition's disk letter */
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*NtSystemPath = (UCHAR)('A' + DriveNumber);
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}
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return TRUE;
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}
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ULONG
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xHalpGetRDiskCount(VOID)
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{
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NTSTATUS Status;
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UNICODE_STRING ArcName;
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PWCHAR ArcNameBuffer;
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OBJECT_ATTRIBUTES ObjectAttributes;
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HANDLE DirectoryHandle;
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POBJECT_DIRECTORY_INFORMATION DirectoryInfo;
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ULONG Skip;
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ULONG ResultLength;
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ULONG CurrentRDisk;
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ULONG RDiskCount;
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BOOLEAN First = TRUE;
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ULONG Count;
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DirectoryInfo = ExAllocatePool(PagedPool, 2 * PAGE_SIZE);
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if (DirectoryInfo == NULL)
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{
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return 0;
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}
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RtlInitUnicodeString(&ArcName, L"\\ArcName");
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InitializeObjectAttributes(&ObjectAttributes,
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&ArcName,
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0,
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NULL,
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NULL);
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Status = ZwOpenDirectoryObject (&DirectoryHandle,
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SYMBOLIC_LINK_ALL_ACCESS,
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&ObjectAttributes);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("ZwOpenDirectoryObject for %wZ failed, status=%lx\n", &ArcName, Status);
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ExFreePool(DirectoryInfo);
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return 0;
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}
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RDiskCount = 0;
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Skip = 0;
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while (NT_SUCCESS(Status))
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{
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Status = NtQueryDirectoryObject (DirectoryHandle,
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DirectoryInfo,
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2 * PAGE_SIZE,
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FALSE,
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First,
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&Skip,
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&ResultLength);
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First = FALSE;
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if (NT_SUCCESS(Status))
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{
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Count = 0;
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while (DirectoryInfo[Count].Name.Buffer)
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{
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DPRINT("Count %x\n", Count);
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DirectoryInfo[Count].Name.Buffer[DirectoryInfo[Count].Name.Length / sizeof(WCHAR)] = 0;
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ArcNameBuffer = DirectoryInfo[Count].Name.Buffer;
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if (DirectoryInfo[Count].Name.Length >= sizeof(L"multi(0)disk(0)rdisk(0)") - sizeof(WCHAR) &&
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!_wcsnicmp(ArcNameBuffer, L"multi(0)disk(0)rdisk(", (sizeof(L"multi(0)disk(0)rdisk(") - sizeof(WCHAR)) / sizeof(WCHAR)))
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{
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DPRINT("%S\n", ArcNameBuffer);
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ArcNameBuffer += (sizeof(L"multi(0)disk(0)rdisk(") - sizeof(WCHAR)) / sizeof(WCHAR);
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CurrentRDisk = 0;
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while (iswdigit(*ArcNameBuffer))
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{
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CurrentRDisk = CurrentRDisk * 10 + *ArcNameBuffer - L'0';
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ArcNameBuffer++;
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}
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if (!_wcsicmp(ArcNameBuffer, L")") &&
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CurrentRDisk >= RDiskCount)
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{
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RDiskCount = CurrentRDisk + 1;
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}
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}
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Count++;
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}
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}
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}
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ExFreePool(DirectoryInfo);
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return RDiskCount;
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}
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NTSTATUS
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xHalpGetDiskNumberFromRDisk(ULONG RDisk, PULONG DiskNumber)
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{
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WCHAR NameBuffer[80];
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UNICODE_STRING ArcName;
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UNICODE_STRING LinkName;
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OBJECT_ATTRIBUTES ObjectAttributes;
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HANDLE LinkHandle;
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NTSTATUS Status;
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swprintf(NameBuffer,
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L"\\ArcName\\multi(0)disk(0)rdisk(%lu)",
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RDisk);
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RtlInitUnicodeString(&ArcName, NameBuffer);
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InitializeObjectAttributes(&ObjectAttributes,
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&ArcName,
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0,
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NULL,
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NULL);
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Status = ZwOpenSymbolicLinkObject(&LinkHandle,
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SYMBOLIC_LINK_ALL_ACCESS,
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&ObjectAttributes);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("ZwOpenSymbolicLinkObject failed for %wZ, status=%lx\n", &ArcName, Status);
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return Status;
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}
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LinkName.Buffer = NameBuffer;
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LinkName.Length = 0;
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LinkName.MaximumLength = sizeof(NameBuffer);
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Status = ZwQuerySymbolicLinkObject(LinkHandle,
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&LinkName,
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NULL);
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ZwClose(LinkHandle);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("ZwQuerySymbolicLinkObject failed, status=%lx\n", Status);
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return Status;
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}
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if (LinkName.Length < sizeof(L"\\Device\\Harddisk0\\Partition0") - sizeof(WCHAR) ||
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LinkName.Length >= sizeof(NameBuffer))
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{
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return STATUS_UNSUCCESSFUL;
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}
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NameBuffer[LinkName.Length / sizeof(WCHAR)] = 0;
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if (_wcsnicmp(NameBuffer, L"\\Device\\Harddisk", (sizeof(L"\\Device\\Harddisk") - sizeof(WCHAR)) / sizeof(WCHAR)))
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{
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return STATUS_UNSUCCESSFUL;
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}
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LinkName.Buffer += (sizeof(L"\\Device\\Harddisk") - sizeof(WCHAR)) / sizeof(WCHAR);
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if (!iswdigit(*LinkName.Buffer))
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{
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return STATUS_UNSUCCESSFUL;
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}
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*DiskNumber = 0;
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while (iswdigit(*LinkName.Buffer))
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{
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*DiskNumber = *DiskNumber * 10 + *LinkName.Buffer - L'0';
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LinkName.Buffer++;
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}
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if (_wcsicmp(LinkName.Buffer, L"\\Partition0"))
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{
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return STATUS_UNSUCCESSFUL;
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}
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return STATUS_SUCCESS;
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}
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NTSTATUS
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FASTCALL
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xHalQueryDriveLayout(IN PUNICODE_STRING DeviceName,
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OUT PDRIVE_LAYOUT_INFORMATION *LayoutInfo)
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{
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IO_STATUS_BLOCK StatusBlock;
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DISK_GEOMETRY DiskGeometry;
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PDEVICE_OBJECT DeviceObject = NULL;
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PFILE_OBJECT FileObject;
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KEVENT Event;
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PIRP Irp;
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NTSTATUS Status;
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DPRINT("xHalpQueryDriveLayout %wZ %p\n",
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DeviceName,
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LayoutInfo);
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/* Get the drives sector size */
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Status = IoGetDeviceObjectPointer(DeviceName,
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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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DPRINT("Status %x\n", Status);
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return(Status);
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}
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KeInitializeEvent(&Event,
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NotificationEvent,
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FALSE);
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Irp = IoBuildDeviceIoControlRequest(IOCTL_DISK_GET_DRIVE_GEOMETRY,
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DeviceObject,
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NULL,
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0,
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&DiskGeometry,
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sizeof(DISK_GEOMETRY),
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FALSE,
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&Event,
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&StatusBlock);
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if (Irp == NULL)
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{
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ObDereferenceObject(FileObject);
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return(STATUS_INSUFFICIENT_RESOURCES);
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}
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Status = IoCallDriver(DeviceObject,
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Irp);
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if (Status == STATUS_PENDING)
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{
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KeWaitForSingleObject(&Event,
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Executive,
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KernelMode,
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FALSE,
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NULL);
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Status = StatusBlock.Status;
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}
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if (!NT_SUCCESS(Status))
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{
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if (DeviceObject->Characteristics & FILE_REMOVABLE_MEDIA)
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{
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DiskGeometry.BytesPerSector = 512;
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}
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else
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{
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ObDereferenceObject(FileObject);
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return(Status);
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}
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}
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DPRINT("DiskGeometry.BytesPerSector: %d\n",
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DiskGeometry.BytesPerSector);
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if (DeviceObject->Characteristics & FILE_REMOVABLE_MEDIA)
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{
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PDRIVE_LAYOUT_INFORMATION Buffer;
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/* Allocate a partition list for a single entry. */
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Buffer = ExAllocatePool(NonPagedPool,
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sizeof(DRIVE_LAYOUT_INFORMATION));
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if (Buffer != NULL)
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{
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RtlZeroMemory(Buffer,
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sizeof(DRIVE_LAYOUT_INFORMATION));
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Buffer->PartitionCount = 1;
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*LayoutInfo = Buffer;
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Status = STATUS_SUCCESS;
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}
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else
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{
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Status = STATUS_UNSUCCESSFUL;
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}
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}
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else
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{
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/* Read the partition table */
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Status = IoReadPartitionTable(DeviceObject,
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DiskGeometry.BytesPerSector,
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FALSE,
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LayoutInfo);
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}
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ObDereferenceObject(FileObject);
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return(Status);
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}
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VOID
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FASTCALL
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xHalIoAssignDriveLetters(IN PLOADER_PARAMETER_BLOCK LoaderBlock,
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IN PSTRING NtDeviceName,
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OUT PUCHAR NtSystemPath,
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OUT PSTRING NtSystemPathString)
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{
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PDRIVE_LAYOUT_INFORMATION *LayoutArray;
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PCONFIGURATION_INFORMATION ConfigInfo;
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OBJECT_ATTRIBUTES ObjectAttributes;
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IO_STATUS_BLOCK StatusBlock;
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UNICODE_STRING UnicodeString1;
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UNICODE_STRING UnicodeString2;
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HANDLE FileHandle;
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PWSTR Buffer1;
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PWSTR Buffer2;
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ULONG i, j, k;
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ULONG DiskNumber;
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ULONG RDisk;
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NTSTATUS Status;
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HANDLE hKey;
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ULONG Length;
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PKEY_VALUE_PARTIAL_INFORMATION PartialInformation;
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PREG_DISK_MOUNT_INFO DiskMountInfo;
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ULONG RDiskCount;
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UNICODE_STRING BootDevice;
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Status = RtlAnsiStringToUnicodeString(&BootDevice,
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NtDeviceName,
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TRUE);
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DPRINT("xHalIoAssignDriveLetters()\n");
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ConfigInfo = IoGetConfigurationInformation();
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RDiskCount = xHalpGetRDiskCount();
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DPRINT("RDiskCount %d\n", RDiskCount);
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Buffer1 = (PWSTR)ExAllocatePool(PagedPool,
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64 * sizeof(WCHAR));
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Buffer2 = (PWSTR)ExAllocatePool(PagedPool,
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32 * sizeof(WCHAR));
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PartialInformation = (PKEY_VALUE_PARTIAL_INFORMATION)ExAllocatePool(PagedPool,
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sizeof(KEY_VALUE_PARTIAL_INFORMATION) + sizeof(REG_DISK_MOUNT_INFO));
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if (!Buffer1 || !Buffer2 || !PartialInformation) return;
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DiskMountInfo = (PREG_DISK_MOUNT_INFO) PartialInformation->Data;
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/* Open or Create the 'MountedDevices' key */
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RtlInitUnicodeString(&UnicodeString1, L"\\Registry\\Machine\\SYSTEM\\MountedDevices");
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InitializeObjectAttributes(&ObjectAttributes,
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&UnicodeString1,
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OBJ_CASE_INSENSITIVE,
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NULL,
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NULL);
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Status = ZwOpenKey(&hKey,
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KEY_ALL_ACCESS,
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&ObjectAttributes);
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if (!NT_SUCCESS(Status))
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{
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Status = ZwCreateKey(&hKey,
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KEY_ALL_ACCESS,
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&ObjectAttributes,
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0,
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NULL,
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REG_OPTION_NON_VOLATILE,
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NULL);
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}
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if (!NT_SUCCESS(Status))
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{
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hKey = NULL;
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DPRINT("ZwCreateKey failed for %wZ, status=%x\n", &UnicodeString1, Status);
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}
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|
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/* Create PhysicalDrive links */
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DPRINT("Physical disk drives: %d\n", ConfigInfo->DiskCount);
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for (i = 0; i < ConfigInfo->DiskCount; i++)
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{
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swprintf(Buffer1,
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L"\\Device\\Harddisk%d\\Partition0",
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i);
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RtlInitUnicodeString(&UnicodeString1,
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Buffer1);
|
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|
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InitializeObjectAttributes(&ObjectAttributes,
|
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&UnicodeString1,
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0,
|
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NULL,
|
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NULL);
|
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|
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Status = ZwOpenFile(&FileHandle,
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FILE_READ_DATA | SYNCHRONIZE,
|
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&ObjectAttributes,
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&StatusBlock,
|
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FILE_SHARE_READ,
|
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FILE_SYNCHRONOUS_IO_NONALERT);
|
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if (NT_SUCCESS(Status))
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{
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ZwClose(FileHandle);
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swprintf(Buffer2,
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L"\\??\\PhysicalDrive%d",
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i);
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RtlInitUnicodeString(&UnicodeString2,
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Buffer2);
|
|
|
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DPRINT("Creating link: %S ==> %S\n",
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Buffer2,
|
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Buffer1);
|
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|
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IoCreateSymbolicLink(&UnicodeString2,
|
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&UnicodeString1);
|
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}
|
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}
|
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|
|
/* Initialize layout array */
|
|
if (ConfigInfo->DiskCount == 0)
|
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goto end_assign_disks;
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|
LayoutArray = ExAllocatePool(NonPagedPool,
|
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ConfigInfo->DiskCount * sizeof(PDRIVE_LAYOUT_INFORMATION));
|
|
if (!LayoutArray)
|
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{
|
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ExFreePool(PartialInformation);
|
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ExFreePool(Buffer2);
|
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ExFreePool(Buffer1);
|
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if (hKey) ZwClose(hKey);
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}
|
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|
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RtlZeroMemory(LayoutArray,
|
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ConfigInfo->DiskCount * sizeof(PDRIVE_LAYOUT_INFORMATION));
|
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for (i = 0; i < ConfigInfo->DiskCount; i++)
|
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{
|
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swprintf(Buffer1,
|
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L"\\Device\\Harddisk%d\\Partition0",
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i);
|
|
RtlInitUnicodeString(&UnicodeString1,
|
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Buffer1);
|
|
|
|
Status = xHalQueryDriveLayout(&UnicodeString1,
|
|
&LayoutArray[i]);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DbgPrint("xHalQueryDriveLayout() failed (Status = 0x%lx)\n",
|
|
Status);
|
|
LayoutArray[i] = NULL;
|
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continue;
|
|
}
|
|
/* We don't use the RewritePartition value while mounting the disks.
|
|
* We use this value for marking pre-assigned (registry) partitions.
|
|
*/
|
|
for (j = 0; j < LayoutArray[i]->PartitionCount; j++)
|
|
{
|
|
LayoutArray[i]->PartitionEntry[j].RewritePartition = FALSE;
|
|
}
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
/* Dump layout array */
|
|
for (i = 0; i < ConfigInfo->DiskCount; i++)
|
|
{
|
|
DPRINT("Harddisk %d:\n",
|
|
i);
|
|
|
|
if (LayoutArray[i] == NULL)
|
|
continue;
|
|
|
|
DPRINT("Logical partitions: %d\n",
|
|
LayoutArray[i]->PartitionCount);
|
|
|
|
for (j = 0; j < LayoutArray[i]->PartitionCount; j++)
|
|
{
|
|
DPRINT(" %d: nr:%x boot:%x type:%x startblock:%I64u count:%I64u\n",
|
|
j,
|
|
LayoutArray[i]->PartitionEntry[j].PartitionNumber,
|
|
LayoutArray[i]->PartitionEntry[j].BootIndicator,
|
|
LayoutArray[i]->PartitionEntry[j].PartitionType,
|
|
LayoutArray[i]->PartitionEntry[j].StartingOffset.QuadPart,
|
|
LayoutArray[i]->PartitionEntry[j].PartitionLength.QuadPart);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Assign pre-assigned (registry) partitions */
|
|
if (hKey)
|
|
{
|
|
for (k = 2; k < 26; k++)
|
|
{
|
|
swprintf(Buffer1, DiskMountString, L'A' + k);
|
|
RtlInitUnicodeString(&UnicodeString1, Buffer1);
|
|
Status = ZwQueryValueKey(hKey,
|
|
&UnicodeString1,
|
|
KeyValuePartialInformation,
|
|
PartialInformation,
|
|
sizeof(KEY_VALUE_PARTIAL_INFORMATION) + sizeof(REG_DISK_MOUNT_INFO),
|
|
&Length);
|
|
if (NT_SUCCESS(Status) &&
|
|
PartialInformation->Type == REG_BINARY &&
|
|
PartialInformation->DataLength == sizeof(REG_DISK_MOUNT_INFO))
|
|
{
|
|
DPRINT("%wZ => %08x:%08x%08x\n", &UnicodeString1, DiskMountInfo->Signature,
|
|
DiskMountInfo->StartingOffset.u.HighPart, DiskMountInfo->StartingOffset.u.LowPart);
|
|
{
|
|
BOOLEAN Found = FALSE;
|
|
for (i = 0; i < ConfigInfo->DiskCount; i++)
|
|
{
|
|
DPRINT("%x\n", LayoutArray[i]->Signature);
|
|
if (LayoutArray[i] &&
|
|
LayoutArray[i]->Signature &&
|
|
LayoutArray[i]->Signature == DiskMountInfo->Signature)
|
|
{
|
|
for (j = 0; j < LayoutArray[i]->PartitionCount; j++)
|
|
{
|
|
if (LayoutArray[i]->PartitionEntry[j].StartingOffset.QuadPart == DiskMountInfo->StartingOffset.QuadPart)
|
|
{
|
|
if (IsRecognizedPartition(LayoutArray[i]->PartitionEntry[j].PartitionType) &&
|
|
LayoutArray[i]->PartitionEntry[j].RewritePartition == FALSE)
|
|
{
|
|
swprintf(Buffer2,
|
|
L"\\Device\\Harddisk%d\\Partition%d",
|
|
i,
|
|
LayoutArray[i]->PartitionEntry[j].PartitionNumber);
|
|
RtlInitUnicodeString(&UnicodeString2,
|
|
Buffer2);
|
|
|
|
/* Assign drive */
|
|
DPRINT(" %wZ\n", &UnicodeString2);
|
|
Found = HalpAssignDrive(&UnicodeString2,
|
|
k,
|
|
DOSDEVICE_DRIVE_FIXED,
|
|
DiskMountInfo->Signature,
|
|
DiskMountInfo->StartingOffset,
|
|
NULL,
|
|
&BootDevice,
|
|
NtSystemPath);
|
|
/* Mark the partition as assigned */
|
|
LayoutArray[i]->PartitionEntry[j].RewritePartition = TRUE;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (Found == FALSE)
|
|
{
|
|
/* We didn't find a partition for this entry, remove them. */
|
|
Status = ZwDeleteValueKey(hKey, &UnicodeString1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Assign bootable partition on first harddisk */
|
|
DPRINT("Assigning bootable primary partition on first harddisk:\n");
|
|
if (RDiskCount > 0)
|
|
{
|
|
Status = xHalpGetDiskNumberFromRDisk(0, &DiskNumber);
|
|
if (NT_SUCCESS(Status) &&
|
|
DiskNumber < ConfigInfo->DiskCount &&
|
|
LayoutArray[DiskNumber])
|
|
{
|
|
/* Search for bootable partition */
|
|
for (j = 0; j < NUM_PARTITION_TABLE_ENTRIES && j < LayoutArray[DiskNumber]->PartitionCount; j++)
|
|
{
|
|
if ((LayoutArray[DiskNumber]->PartitionEntry[j].BootIndicator == TRUE) &&
|
|
IsRecognizedPartition(LayoutArray[DiskNumber]->PartitionEntry[j].PartitionType))
|
|
{
|
|
if (LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition == FALSE)
|
|
{
|
|
swprintf(Buffer2,
|
|
L"\\Device\\Harddisk%lu\\Partition%d",
|
|
DiskNumber,
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber);
|
|
RtlInitUnicodeString(&UnicodeString2,
|
|
Buffer2);
|
|
|
|
/* Assign drive */
|
|
DPRINT(" %wZ\n", &UnicodeString2);
|
|
HalpAssignDrive(&UnicodeString2,
|
|
AUTO_DRIVE,
|
|
DOSDEVICE_DRIVE_FIXED,
|
|
LayoutArray[DiskNumber]->Signature,
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].StartingOffset,
|
|
hKey,
|
|
&BootDevice,
|
|
NtSystemPath);
|
|
/* Mark the partition as assigned */
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition = TRUE;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Assign remaining primary partitions */
|
|
DPRINT("Assigning remaining primary partitions:\n");
|
|
for (RDisk = 0; RDisk < RDiskCount; RDisk++)
|
|
{
|
|
Status = xHalpGetDiskNumberFromRDisk(RDisk, &DiskNumber);
|
|
if (NT_SUCCESS(Status) &&
|
|
DiskNumber < ConfigInfo->DiskCount &&
|
|
LayoutArray[DiskNumber])
|
|
{
|
|
/* Search for primary partitions */
|
|
for (j = 0; (j < NUM_PARTITION_TABLE_ENTRIES) && (j < LayoutArray[DiskNumber]->PartitionCount); j++)
|
|
{
|
|
if (LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition == FALSE &&
|
|
IsRecognizedPartition(LayoutArray[DiskNumber]->PartitionEntry[j].PartitionType))
|
|
{
|
|
swprintf(Buffer2,
|
|
L"\\Device\\Harddisk%d\\Partition%d",
|
|
DiskNumber,
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber);
|
|
RtlInitUnicodeString(&UnicodeString2,
|
|
Buffer2);
|
|
|
|
/* Assign drive */
|
|
DPRINT(" %wZ\n",
|
|
&UnicodeString2);
|
|
HalpAssignDrive(&UnicodeString2,
|
|
AUTO_DRIVE,
|
|
DOSDEVICE_DRIVE_FIXED,
|
|
LayoutArray[DiskNumber]->Signature,
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].StartingOffset,
|
|
hKey,
|
|
&BootDevice,
|
|
NtSystemPath);
|
|
/* Mark the partition as assigned */
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition = TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Assign extended (logical) partitions */
|
|
DPRINT("Assigning extended (logical) partitions:\n");
|
|
for (RDisk = 0; RDisk < RDiskCount; RDisk++)
|
|
{
|
|
Status = xHalpGetDiskNumberFromRDisk(RDisk, &DiskNumber);
|
|
if (NT_SUCCESS(Status) &&
|
|
DiskNumber < ConfigInfo->DiskCount &&
|
|
LayoutArray[DiskNumber])
|
|
{
|
|
/* Search for extended partitions */
|
|
for (j = NUM_PARTITION_TABLE_ENTRIES; j < LayoutArray[DiskNumber]->PartitionCount; j++)
|
|
{
|
|
if (IsRecognizedPartition(LayoutArray[DiskNumber]->PartitionEntry[j].PartitionType) &&
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition == FALSE &&
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber != 0)
|
|
{
|
|
swprintf(Buffer2,
|
|
L"\\Device\\Harddisk%d\\Partition%d",
|
|
DiskNumber,
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber);
|
|
RtlInitUnicodeString(&UnicodeString2,
|
|
Buffer2);
|
|
|
|
/* Assign drive */
|
|
DPRINT(" %wZ\n",
|
|
&UnicodeString2);
|
|
HalpAssignDrive(&UnicodeString2,
|
|
AUTO_DRIVE,
|
|
DOSDEVICE_DRIVE_FIXED,
|
|
LayoutArray[DiskNumber]->Signature,
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].StartingOffset,
|
|
hKey,
|
|
&BootDevice,
|
|
NtSystemPath);
|
|
/* Mark the partition as assigned */
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition = TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Assign remaining primary partitions without an arc-name */
|
|
DPRINT("Assigning remaining primary partitions:\n");
|
|
for (DiskNumber = 0; DiskNumber < ConfigInfo->DiskCount; DiskNumber++)
|
|
{
|
|
if (LayoutArray[DiskNumber])
|
|
{
|
|
/* Search for primary partitions */
|
|
for (j = 0; (j < NUM_PARTITION_TABLE_ENTRIES) && (j < LayoutArray[DiskNumber]->PartitionCount); j++)
|
|
{
|
|
if (LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition == FALSE &&
|
|
IsRecognizedPartition(LayoutArray[DiskNumber]->PartitionEntry[j].PartitionType))
|
|
{
|
|
swprintf(Buffer2,
|
|
L"\\Device\\Harddisk%d\\Partition%d",
|
|
DiskNumber,
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber);
|
|
RtlInitUnicodeString(&UnicodeString2,
|
|
Buffer2);
|
|
|
|
/* Assign drive */
|
|
DPRINT(" %wZ\n",
|
|
&UnicodeString2);
|
|
HalpAssignDrive(&UnicodeString2,
|
|
AUTO_DRIVE,
|
|
DOSDEVICE_DRIVE_FIXED,
|
|
LayoutArray[DiskNumber]->Signature,
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].StartingOffset,
|
|
hKey,
|
|
&BootDevice,
|
|
NtSystemPath);
|
|
/* Mark the partition as assigned */
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition = TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Assign extended (logical) partitions without an arc-name */
|
|
DPRINT("Assigning extended (logical) partitions:\n");
|
|
for (DiskNumber = 0; DiskNumber < ConfigInfo->DiskCount; DiskNumber++)
|
|
{
|
|
if (LayoutArray[DiskNumber])
|
|
{
|
|
/* Search for extended partitions */
|
|
for (j = NUM_PARTITION_TABLE_ENTRIES; j < LayoutArray[DiskNumber]->PartitionCount; j++)
|
|
{
|
|
if (IsRecognizedPartition(LayoutArray[DiskNumber]->PartitionEntry[j].PartitionType) &&
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition == FALSE &&
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber != 0)
|
|
{
|
|
swprintf(Buffer2,
|
|
L"\\Device\\Harddisk%d\\Partition%d",
|
|
DiskNumber,
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber);
|
|
RtlInitUnicodeString(&UnicodeString2,
|
|
Buffer2);
|
|
|
|
/* Assign drive */
|
|
DPRINT(" %wZ\n",
|
|
&UnicodeString2);
|
|
HalpAssignDrive(&UnicodeString2,
|
|
AUTO_DRIVE,
|
|
DOSDEVICE_DRIVE_FIXED,
|
|
LayoutArray[DiskNumber]->Signature,
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].StartingOffset,
|
|
hKey,
|
|
&BootDevice,
|
|
NtSystemPath);
|
|
/* Mark the partition as assigned */
|
|
LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition = TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Assign removable disk drives */
|
|
DPRINT("Assigning removable disk drives:\n");
|
|
for (i = 0; i < ConfigInfo->DiskCount; i++)
|
|
{
|
|
if (LayoutArray[i])
|
|
{
|
|
/* Search for virtual partitions */
|
|
if (LayoutArray[i]->PartitionCount == 1 &&
|
|
LayoutArray[i]->PartitionEntry[0].PartitionType == 0)
|
|
{
|
|
swprintf(Buffer2,
|
|
L"\\Device\\Harddisk%d\\Partition1",
|
|
i);
|
|
RtlInitUnicodeString(&UnicodeString2,
|
|
Buffer2);
|
|
|
|
/* Assign drive */
|
|
DPRINT(" %wZ\n",
|
|
&UnicodeString2);
|
|
HalpAssignDrive(&UnicodeString2,
|
|
AUTO_DRIVE,
|
|
DOSDEVICE_DRIVE_REMOVABLE,
|
|
0,
|
|
RtlConvertLongToLargeInteger(0),
|
|
hKey,
|
|
&BootDevice,
|
|
NtSystemPath);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Free layout array */
|
|
for (i = 0; i < ConfigInfo->DiskCount; i++)
|
|
{
|
|
if (LayoutArray[i] != NULL)
|
|
ExFreePool(LayoutArray[i]);
|
|
}
|
|
ExFreePool(LayoutArray);
|
|
end_assign_disks:
|
|
|
|
/* Assign floppy drives */
|
|
DPRINT("Floppy drives: %d\n", ConfigInfo->FloppyCount);
|
|
for (i = 0; i < ConfigInfo->FloppyCount; i++)
|
|
{
|
|
swprintf(Buffer1,
|
|
L"\\Device\\Floppy%d",
|
|
i);
|
|
RtlInitUnicodeString(&UnicodeString1,
|
|
Buffer1);
|
|
|
|
/* Assign drive letters A: or B: or first free drive letter */
|
|
DPRINT(" %wZ\n",
|
|
&UnicodeString1);
|
|
HalpAssignDrive(&UnicodeString1,
|
|
(i < 2) ? i : AUTO_DRIVE,
|
|
DOSDEVICE_DRIVE_REMOVABLE,
|
|
0,
|
|
RtlConvertLongToLargeInteger(0),
|
|
hKey,
|
|
&BootDevice,
|
|
NtSystemPath);
|
|
}
|
|
|
|
/* Assign cdrom drives */
|
|
DPRINT("CD-Rom drives: %d\n", ConfigInfo->CdRomCount);
|
|
for (i = 0; i < ConfigInfo->CdRomCount; i++)
|
|
{
|
|
swprintf(Buffer1,
|
|
L"\\Device\\CdRom%d",
|
|
i);
|
|
RtlInitUnicodeString(&UnicodeString1,
|
|
Buffer1);
|
|
|
|
/* Assign first free drive letter */
|
|
DPRINT(" %wZ\n", &UnicodeString1);
|
|
HalpAssignDrive(&UnicodeString1,
|
|
AUTO_DRIVE,
|
|
DOSDEVICE_DRIVE_CDROM,
|
|
0,
|
|
RtlConvertLongToLargeInteger(0),
|
|
hKey,
|
|
&BootDevice,
|
|
NtSystemPath);
|
|
}
|
|
|
|
/* Anything else to do? */
|
|
|
|
ExFreePool(PartialInformation);
|
|
ExFreePool(Buffer2);
|
|
ExFreePool(Buffer1);
|
|
if (hKey)
|
|
{
|
|
ZwClose(hKey);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
/* PRIVATE FUNCTIONS *********************************************************/
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
HalpGetFullGeometry(IN PDEVICE_OBJECT DeviceObject,
|
|
IN PDISK_GEOMETRY Geometry,
|
|
OUT PULONGLONG RealSectorCount)
|
|
{
|
|
PIRP Irp;
|
|
IO_STATUS_BLOCK IoStatusBlock;
|
|
PKEVENT Event;
|
|
NTSTATUS Status;
|
|
PARTITION_INFORMATION PartitionInfo;
|
|
PAGED_CODE();
|
|
|
|
/* Allocate a non-paged event */
|
|
Event = ExAllocatePoolWithTag(NonPagedPool,
|
|
sizeof(KEVENT),
|
|
TAG_FILE_SYSTEM);
|
|
if (!Event) return STATUS_INSUFFICIENT_RESOURCES;
|
|
|
|
/* Initialize it */
|
|
KeInitializeEvent(Event, NotificationEvent, FALSE);
|
|
|
|
/* Build the IRP */
|
|
Irp = IoBuildDeviceIoControlRequest(IOCTL_DISK_GET_DRIVE_GEOMETRY,
|
|
DeviceObject,
|
|
NULL,
|
|
0UL,
|
|
Geometry,
|
|
sizeof(DISK_GEOMETRY),
|
|
FALSE,
|
|
Event,
|
|
&IoStatusBlock);
|
|
if (!Irp)
|
|
{
|
|
/* Fail, free the event */
|
|
ExFreePoolWithTag(Event, TAG_FILE_SYSTEM);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Call the driver and check if it's pending */
|
|
Status = IoCallDriver(DeviceObject, Irp);
|
|
if (Status == STATUS_PENDING)
|
|
{
|
|
/* Wait on the driver */
|
|
KeWaitForSingleObject(Event, Executive, KernelMode, FALSE, NULL);
|
|
Status = IoStatusBlock.Status;
|
|
}
|
|
|
|
/* Check if the driver returned success */
|
|
if(NT_SUCCESS(Status))
|
|
{
|
|
/* Build another IRP */
|
|
Irp = IoBuildDeviceIoControlRequest(IOCTL_DISK_GET_PARTITION_INFO,
|
|
DeviceObject,
|
|
NULL,
|
|
0UL,
|
|
&PartitionInfo,
|
|
sizeof(PARTITION_INFORMATION),
|
|
FALSE,
|
|
Event,
|
|
&IoStatusBlock);
|
|
if (!Irp)
|
|
{
|
|
/* Fail, free the event */
|
|
ExFreePoolWithTag(Event, TAG_FILE_SYSTEM);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Call the driver and check if it's pending */
|
|
Status = IoCallDriver(DeviceObject, Irp);
|
|
if (Status == STATUS_PENDING)
|
|
{
|
|
/* Wait on the driver */
|
|
KeWaitForSingleObject(Event, Executive, KernelMode, FALSE, NULL);
|
|
Status = IoStatusBlock.Status;
|
|
}
|
|
|
|
/* Check if the driver returned success */
|
|
if(NT_SUCCESS(Status))
|
|
{
|
|
/* Get the number of sectors */
|
|
*RealSectorCount = (PartitionInfo.PartitionLength.QuadPart /
|
|
Geometry->BytesPerSector);
|
|
}
|
|
}
|
|
|
|
/* Free the event and return the Status */
|
|
ExFreePoolWithTag(Event, TAG_FILE_SYSTEM);
|
|
return Status;
|
|
}
|
|
|
|
BOOLEAN
|
|
NTAPI
|
|
HalpIsValidPartitionEntry(IN PPARTITION_DESCRIPTOR Entry,
|
|
IN ULONGLONG MaxOffset,
|
|
IN ULONGLONG MaxSector)
|
|
{
|
|
ULONGLONG EndingSector;
|
|
PAGED_CODE();
|
|
|
|
/* Unused partitions are considered valid */
|
|
if (Entry->PartitionType == PARTITION_ENTRY_UNUSED) return TRUE;
|
|
|
|
/* Get the last sector of the partition */
|
|
EndingSector = GET_STARTING_SECTOR(Entry) + GET_PARTITION_LENGTH(Entry);
|
|
|
|
/* Check if it's more then the maximum sector */
|
|
if (EndingSector > MaxSector)
|
|
{
|
|
/* Invalid partition */
|
|
DPRINT1("FSTUB: entry is invalid\n");
|
|
DPRINT1("FSTUB: offset %#08lx\n", GET_STARTING_SECTOR(Entry));
|
|
DPRINT1("FSTUB: length %#08lx\n", GET_PARTITION_LENGTH(Entry));
|
|
DPRINT1("FSTUB: end %#I64x\n", EndingSector);
|
|
DPRINT1("FSTUB: max %#I64x\n", MaxSector);
|
|
return FALSE;
|
|
}
|
|
else if(GET_STARTING_SECTOR(Entry) > MaxOffset)
|
|
{
|
|
/* Invalid partition */
|
|
DPRINT1("FSTUB: entry is invalid\n");
|
|
DPRINT1("FSTUB: offset %#08lx\n", GET_STARTING_SECTOR(Entry));
|
|
DPRINT1("FSTUB: length %#08lx\n", GET_PARTITION_LENGTH(Entry));
|
|
DPRINT1("FSTUB: end %#I64x\n", EndingSector);
|
|
DPRINT1("FSTUB: maxOffset %#I64x\n", MaxOffset);
|
|
return FALSE;
|
|
}
|
|
|
|
/* It's fine, return success */
|
|
return TRUE;
|
|
}
|
|
|
|
VOID
|
|
NTAPI
|
|
HalpCalculateChsValues(IN PLARGE_INTEGER PartitionOffset,
|
|
IN PLARGE_INTEGER PartitionLength,
|
|
IN CCHAR ShiftCount,
|
|
IN ULONG SectorsPerTrack,
|
|
IN ULONG NumberOfTracks,
|
|
IN ULONG ConventionalCylinders,
|
|
OUT PPARTITION_DESCRIPTOR PartitionDescriptor)
|
|
{
|
|
LARGE_INTEGER FirstSector, SectorCount;
|
|
ULONG LastSector, Remainder, SectorsPerCylinder;
|
|
ULONG StartingCylinder, EndingCylinder;
|
|
ULONG StartingTrack, EndingTrack;
|
|
ULONG StartingSector, EndingSector;
|
|
PAGED_CODE();
|
|
|
|
/* Calculate the number of sectors for each cylinder */
|
|
SectorsPerCylinder = SectorsPerTrack * NumberOfTracks;
|
|
|
|
/* Calculate the first sector, and the sector count */
|
|
FirstSector.QuadPart = PartitionOffset->QuadPart >> ShiftCount;
|
|
SectorCount.QuadPart = PartitionLength->QuadPart >> ShiftCount;
|
|
|
|
/* Now calculate the last sector */
|
|
LastSector = FirstSector.LowPart + SectorCount.LowPart - 1;
|
|
|
|
/* Calculate the first and last cylinders */
|
|
StartingCylinder = FirstSector.LowPart / SectorsPerCylinder;
|
|
EndingCylinder = LastSector / SectorsPerCylinder;
|
|
|
|
/* Set the default number of cylinders */
|
|
if (!ConventionalCylinders) ConventionalCylinders = 1024;
|
|
|
|
/* Normalize the values */
|
|
if (StartingCylinder >= ConventionalCylinders)
|
|
{
|
|
/* Set the maximum to 1023 */
|
|
StartingCylinder = ConventionalCylinders - 1;
|
|
}
|
|
if (EndingCylinder >= ConventionalCylinders)
|
|
{
|
|
/* Set the maximum to 1023 */
|
|
EndingCylinder = ConventionalCylinders - 1;
|
|
}
|
|
|
|
/* Calculate the starting head and sector that still remain */
|
|
Remainder = FirstSector.LowPart % SectorsPerCylinder;
|
|
StartingTrack = Remainder / SectorsPerTrack;
|
|
StartingSector = Remainder % SectorsPerTrack;
|
|
|
|
/* Calculate the ending head and sector that still remain */
|
|
Remainder = LastSector % SectorsPerCylinder;
|
|
EndingTrack = Remainder / SectorsPerTrack;
|
|
EndingSector = Remainder % SectorsPerTrack;
|
|
|
|
/* Set cylinder data for the MSB */
|
|
PartitionDescriptor->StartingCylinderMsb = (UCHAR)StartingCylinder;
|
|
PartitionDescriptor->EndingCylinderMsb = (UCHAR)EndingCylinder;
|
|
|
|
/* Set the track data */
|
|
PartitionDescriptor->StartingTrack = (UCHAR)StartingTrack;
|
|
PartitionDescriptor->EndingTrack = (UCHAR)EndingTrack;
|
|
|
|
/* Update cylinder data for the LSB */
|
|
StartingCylinder = ((StartingSector + 1) & 0x3F) |
|
|
((StartingCylinder >> 2) & 0xC0);
|
|
EndingCylinder = ((EndingSector + 1) & 0x3F) |
|
|
((EndingCylinder >> 2) & 0xC0);
|
|
|
|
/* Set the cylinder data for the LSB */
|
|
PartitionDescriptor->StartingCylinderLsb = (UCHAR)StartingCylinder;
|
|
PartitionDescriptor->EndingCylinderLsb = (UCHAR)EndingCylinder;
|
|
}
|
|
|
|
VOID
|
|
FASTCALL
|
|
xHalGetPartialGeometry(IN PDEVICE_OBJECT DeviceObject,
|
|
IN PULONG ConventionalCylinders,
|
|
IN PLONGLONG DiskSize)
|
|
{
|
|
PDISK_GEOMETRY DiskGeometry = NULL;
|
|
PIO_STATUS_BLOCK IoStatusBlock = NULL;
|
|
PKEVENT Event = NULL;
|
|
PIRP Irp;
|
|
NTSTATUS Status;
|
|
|
|
/* Set defaults */
|
|
*ConventionalCylinders = 0;
|
|
*DiskSize = 0;
|
|
|
|
/* Allocate the structure in nonpaged pool */
|
|
DiskGeometry = ExAllocatePoolWithTag(NonPagedPool,
|
|
sizeof(DISK_GEOMETRY),
|
|
TAG_FILE_SYSTEM);
|
|
if (!DiskGeometry) goto Cleanup;
|
|
|
|
/* Allocate the status block in nonpaged pool */
|
|
IoStatusBlock = ExAllocatePoolWithTag(NonPagedPool,
|
|
sizeof(IO_STATUS_BLOCK),
|
|
TAG_FILE_SYSTEM);
|
|
if (!IoStatusBlock) goto Cleanup;
|
|
|
|
/* Allocate the event in nonpaged pool too */
|
|
Event = ExAllocatePoolWithTag(NonPagedPool,
|
|
sizeof(KEVENT),
|
|
TAG_FILE_SYSTEM);
|
|
if (!Event) goto Cleanup;
|
|
|
|
/* Initialize the event */
|
|
KeInitializeEvent(Event, NotificationEvent, FALSE);
|
|
|
|
/* Build the IRP */
|
|
Irp = IoBuildDeviceIoControlRequest(IOCTL_DISK_GET_DRIVE_GEOMETRY,
|
|
DeviceObject,
|
|
NULL,
|
|
0,
|
|
DiskGeometry,
|
|
sizeof(DISK_GEOMETRY),
|
|
FALSE,
|
|
Event,
|
|
IoStatusBlock);
|
|
if (!Irp) goto Cleanup;
|
|
|
|
/* Now call the driver */
|
|
Status = IoCallDriver(DeviceObject, Irp);
|
|
if (Status == STATUS_PENDING)
|
|
{
|
|
/* Wait for it to complete */
|
|
KeWaitForSingleObject(Event, Executive, KernelMode, FALSE, NULL);
|
|
Status = IoStatusBlock->Status;
|
|
}
|
|
|
|
/* Check driver status */
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
/* Return the cylinder count */
|
|
*ConventionalCylinders = DiskGeometry->Cylinders.LowPart;
|
|
|
|
/* Make sure it's not larger then 1024 */
|
|
if (DiskGeometry->Cylinders.LowPart >= 1024)
|
|
{
|
|
/* Otherwise, normalize the value */
|
|
*ConventionalCylinders = 1024;
|
|
}
|
|
|
|
/* Calculate the disk size */
|
|
*DiskSize = DiskGeometry->Cylinders.QuadPart *
|
|
DiskGeometry->TracksPerCylinder *
|
|
DiskGeometry->SectorsPerTrack *
|
|
DiskGeometry->BytesPerSector;
|
|
}
|
|
|
|
Cleanup:
|
|
/* Free all the pointers */
|
|
if (Event) ExFreePoolWithTag(Event, TAG_FILE_SYSTEM);
|
|
if (IoStatusBlock) ExFreePool(IoStatusBlock);
|
|
if (DiskGeometry) ExFreePool(DiskGeometry);
|
|
return;
|
|
}
|
|
|
|
VOID
|
|
FASTCALL
|
|
xHalExamineMBR(IN PDEVICE_OBJECT DeviceObject,
|
|
IN ULONG SectorSize,
|
|
IN ULONG MbrTypeIdentifier,
|
|
OUT PVOID *MbrBuffer)
|
|
{
|
|
LARGE_INTEGER Offset;
|
|
PUCHAR Buffer;
|
|
ULONG BufferSize;
|
|
KEVENT Event;
|
|
IO_STATUS_BLOCK IoStatusBlock;
|
|
PIRP Irp;
|
|
PPARTITION_DESCRIPTOR PartitionDescriptor;
|
|
NTSTATUS Status;
|
|
PIO_STACK_LOCATION IoStackLocation;
|
|
Offset.QuadPart = 0;
|
|
|
|
/* Assume failure */
|
|
*MbrBuffer = NULL;
|
|
|
|
/* Normalize the buffer size */
|
|
BufferSize = max(SectorSize, 512);
|
|
|
|
/* Allocate the buffer */
|
|
Buffer = ExAllocatePoolWithTag(NonPagedPool,
|
|
PAGE_SIZE > BufferSize ?
|
|
PAGE_SIZE : BufferSize,
|
|
TAG_FILE_SYSTEM);
|
|
if (!Buffer) return;
|
|
|
|
/* Initialize the Event */
|
|
KeInitializeEvent(&Event, NotificationEvent, FALSE);
|
|
|
|
/* Build the IRP */
|
|
Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
|
|
DeviceObject,
|
|
Buffer,
|
|
BufferSize,
|
|
&Offset,
|
|
&Event,
|
|
&IoStatusBlock);
|
|
if (!Irp)
|
|
{
|
|
/* Failed */
|
|
ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
|
|
return;
|
|
}
|
|
|
|
/* Make sure to override volume verification */
|
|
IoStackLocation = IoGetNextIrpStackLocation(Irp);
|
|
IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
|
|
|
|
/* Call the driver */
|
|
Status = IoCallDriver(DeviceObject, Irp);
|
|
if (Status == STATUS_PENDING)
|
|
{
|
|
/* Wait for completion */
|
|
KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
|
|
Status = IoStatusBlock.Status;
|
|
}
|
|
|
|
/* Check driver Status */
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
/* Validate the MBR Signature */
|
|
if (((PUSHORT)Buffer)[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
|
|
{
|
|
/* Failed */
|
|
ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
|
|
return;
|
|
}
|
|
|
|
/* Get the partition entry */
|
|
PartitionDescriptor = (PPARTITION_DESCRIPTOR)
|
|
&(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);
|
|
|
|
/* Make sure it's what the caller wanted */
|
|
if (PartitionDescriptor->PartitionType != MbrTypeIdentifier)
|
|
{
|
|
/* It's not, free our buffer */
|
|
ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
|
|
}
|
|
else
|
|
{
|
|
/* Check if this is a secondary entry */
|
|
if (PartitionDescriptor->PartitionType == 0x54)
|
|
{
|
|
/* Return our buffer, but at sector 63 */
|
|
*(PULONG)Buffer = 63;
|
|
*MbrBuffer = Buffer;
|
|
}
|
|
else if (PartitionDescriptor->PartitionType == 0x55)
|
|
{
|
|
/* EZ Drive, return the buffer directly */
|
|
*MbrBuffer = Buffer;
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise crash on debug builds */
|
|
ASSERT(PartitionDescriptor->PartitionType == 0x55);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
NTSTATUS
|
|
FASTCALL
|
|
xHalIoReadPartitionTable(IN PDEVICE_OBJECT DeviceObject,
|
|
IN ULONG SectorSize,
|
|
IN BOOLEAN ReturnRecognizedPartitions,
|
|
IN OUT PDRIVE_LAYOUT_INFORMATION *PartitionBuffer)
|
|
{
|
|
KEVENT Event;
|
|
IO_STATUS_BLOCK IoStatusBlock;
|
|
PIRP Irp;
|
|
PPARTITION_DESCRIPTOR PartitionDescriptor;
|
|
CCHAR Entry;
|
|
NTSTATUS Status;
|
|
PPARTITION_INFORMATION PartitionInfo;
|
|
PUCHAR Buffer = NULL;
|
|
ULONG BufferSize = 2048, InputSize;
|
|
PDRIVE_LAYOUT_INFORMATION DriveLayoutInfo = NULL;
|
|
LONG j = -1, i = -1, k;
|
|
DISK_GEOMETRY DiskGeometry;
|
|
LONGLONG EndSector, MaxSector, StartOffset;
|
|
ULONGLONG MaxOffset;
|
|
LARGE_INTEGER Offset, VolumeOffset;
|
|
BOOLEAN IsPrimary = TRUE, IsEzDrive = FALSE, MbrFound = FALSE;
|
|
BOOLEAN IsValid, IsEmpty = TRUE;
|
|
PVOID MbrBuffer;
|
|
PIO_STACK_LOCATION IoStackLocation;
|
|
PBOOT_SECTOR_INFO BootSectorInfo = (PBOOT_SECTOR_INFO)Buffer;
|
|
UCHAR PartitionType;
|
|
LARGE_INTEGER HiddenSectors64;
|
|
VolumeOffset.QuadPart = Offset.QuadPart = 0;
|
|
PAGED_CODE();
|
|
|
|
/* Allocate the buffer */
|
|
*PartitionBuffer = ExAllocatePoolWithTag(NonPagedPool,
|
|
BufferSize,
|
|
TAG_FILE_SYSTEM);
|
|
if (!(*PartitionBuffer)) return STATUS_INSUFFICIENT_RESOURCES;
|
|
|
|
/* Normalize the buffer size */
|
|
InputSize = max(512, SectorSize);
|
|
|
|
/* Check for EZ Drive */
|
|
HalExamineMBR(DeviceObject, InputSize, 0x55, &MbrBuffer);
|
|
if (MbrBuffer)
|
|
{
|
|
/* EZ Drive found, bias the offset */
|
|
IsEzDrive = TRUE;
|
|
ExFreePool(MbrBuffer);
|
|
Offset.QuadPart = 512;
|
|
}
|
|
|
|
/* Get drive geometry */
|
|
Status = HalpGetFullGeometry(DeviceObject, &DiskGeometry, &MaxOffset);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
ExFreePoolWithTag(*PartitionBuffer, TAG_FILE_SYSTEM);
|
|
*PartitionBuffer = NULL;
|
|
return Status;
|
|
}
|
|
|
|
/* Get the end and maximum sector */
|
|
EndSector = MaxOffset;
|
|
MaxSector = MaxOffset << 1;
|
|
DPRINT("FSTUB: MaxOffset = %#I64x, MaxSector = %#I64x\n",
|
|
MaxOffset, MaxSector);
|
|
|
|
/* Allocate our buffer */
|
|
Buffer = ExAllocatePoolWithTag(NonPagedPool, PAGE_SIZE, TAG_FILE_SYSTEM);
|
|
if (!Buffer)
|
|
{
|
|
/* Fail, free the input buffer */
|
|
ExFreePoolWithTag(*PartitionBuffer, TAG_FILE_SYSTEM);
|
|
*PartitionBuffer = NULL;
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Start partition loop */
|
|
do
|
|
{
|
|
/* Assume the partition is valid */
|
|
IsValid = TRUE;
|
|
|
|
/* Initialize the event */
|
|
KeInitializeEvent(&Event, NotificationEvent, FALSE);
|
|
|
|
/* Clear the buffer and build the IRP */
|
|
RtlZeroMemory(Buffer, InputSize);
|
|
Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
|
|
DeviceObject,
|
|
Buffer,
|
|
InputSize,
|
|
&Offset,
|
|
&Event,
|
|
&IoStatusBlock);
|
|
if (!Irp)
|
|
{
|
|
/* Failed */
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
break;
|
|
}
|
|
|
|
/* Make sure to disable volume verification */
|
|
IoStackLocation = IoGetNextIrpStackLocation(Irp);
|
|
IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
|
|
|
|
/* Call the driver */
|
|
Status = IoCallDriver(DeviceObject, Irp);
|
|
if (Status == STATUS_PENDING)
|
|
{
|
|
/* Wait for completion */
|
|
KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
|
|
Status = IoStatusBlock.Status;
|
|
}
|
|
|
|
/* Normalize status code and check for failure */
|
|
if (Status == STATUS_NO_DATA_DETECTED) Status = STATUS_SUCCESS;
|
|
if (!NT_SUCCESS(Status)) break;
|
|
|
|
/* If we biased for EZ-Drive, unbias now */
|
|
if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;
|
|
|
|
/* Make sure this is a valid MBR */
|
|
if (((PUSHORT)Buffer)[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
|
|
{
|
|
/* It's not, fail */
|
|
DPRINT1("FSTUB: (IoReadPartitionTable) No 0xaa55 found in "
|
|
"partition table %d\n", j + 1);
|
|
break;
|
|
}
|
|
|
|
/* At this point we have a valid MBR */
|
|
MbrFound = TRUE;
|
|
|
|
/* Check if we weren't given an offset */
|
|
if (!Offset.QuadPart)
|
|
{
|
|
/* Then read the signature off the disk */
|
|
(*PartitionBuffer)->Signature = ((PULONG)Buffer)
|
|
[PARTITION_TABLE_OFFSET / 2 - 1];
|
|
}
|
|
|
|
/* Get the partition descriptor array */
|
|
PartitionDescriptor = (PPARTITION_DESCRIPTOR)
|
|
&(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);
|
|
|
|
/* Get the partition type */
|
|
PartitionType = PartitionDescriptor->PartitionType;
|
|
|
|
/* Start looping partitions */
|
|
j++;
|
|
DPRINT("FSTUB: Partition Table %d:\n", j);
|
|
for (Entry = 1, k = 0; Entry <= 4; Entry++, PartitionDescriptor++)
|
|
{
|
|
/* Get the partition type */
|
|
PartitionType = PartitionDescriptor->PartitionType;
|
|
|
|
/* Print debug messages */
|
|
DPRINT("Partition Entry %d,%d: type %#x %s\n",
|
|
j,
|
|
Entry,
|
|
PartitionType,
|
|
(PartitionDescriptor->ActiveFlag) ? "Active" : "");
|
|
DPRINT("\tOffset %#08lx for %#08lx Sectors\n",
|
|
GET_STARTING_SECTOR(PartitionDescriptor),
|
|
GET_PARTITION_LENGTH(PartitionDescriptor));
|
|
|
|
/* Make sure that the partition is valid, unless it's the first */
|
|
if (!(HalpIsValidPartitionEntry(PartitionDescriptor,
|
|
MaxOffset,
|
|
MaxSector)) && !(j))
|
|
{
|
|
/* It's invalid, so fail */
|
|
IsValid = FALSE;
|
|
break;
|
|
}
|
|
|
|
/* Check if it's a container */
|
|
if (IsContainerPartition(PartitionType))
|
|
{
|
|
/* Increase the count of containers */
|
|
if (++k != 1)
|
|
{
|
|
/* More then one table is invalid */
|
|
DPRINT1("FSTUB: Multiple container partitions found in "
|
|
"partition table %d\n - table is invalid\n",
|
|
j);
|
|
IsValid = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Check if the partition is supposedly empty */
|
|
if (IsEmpty)
|
|
{
|
|
/* But check if it actually has a start and/or length */
|
|
if ((GET_STARTING_SECTOR(PartitionDescriptor)) ||
|
|
(GET_PARTITION_LENGTH(PartitionDescriptor)))
|
|
{
|
|
/* So then it's not really empty */
|
|
IsEmpty = FALSE;
|
|
}
|
|
}
|
|
|
|
/* Check if the caller wanted only recognized partitions */
|
|
if (ReturnRecognizedPartitions)
|
|
{
|
|
/* Then check if this one is unused, or a container */
|
|
if ((PartitionType == PARTITION_ENTRY_UNUSED) ||
|
|
IsContainerPartition(PartitionType))
|
|
{
|
|
/* Skip it, since the caller doesn't want it */
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* Increase the structure count and check if they can fit */
|
|
if ((sizeof(DRIVE_LAYOUT_INFORMATION) +
|
|
(++i * sizeof(PARTITION_INFORMATION))) >
|
|
BufferSize)
|
|
{
|
|
/* Allocate a new buffer that's twice as big */
|
|
DriveLayoutInfo = ExAllocatePoolWithTag(NonPagedPool,
|
|
BufferSize << 1,
|
|
TAG_FILE_SYSTEM);
|
|
if (!DriveLayoutInfo)
|
|
{
|
|
/* Out of memory, unto this extra structure */
|
|
--i;
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
break;
|
|
}
|
|
|
|
/* Copy the contents of the old buffer */
|
|
RtlMoveMemory(DriveLayoutInfo,
|
|
*PartitionBuffer,
|
|
BufferSize);
|
|
|
|
/* Free the old buffer and set this one as the new one */
|
|
ExFreePoolWithTag(*PartitionBuffer, TAG_FILE_SYSTEM);
|
|
*PartitionBuffer = DriveLayoutInfo;
|
|
|
|
/* Double the size */
|
|
BufferSize <<= 1;
|
|
}
|
|
|
|
/* Now get the current structure being filled and initialize it */
|
|
PartitionInfo = &(*PartitionBuffer)->PartitionEntry[i];
|
|
PartitionInfo->PartitionType = PartitionType;
|
|
PartitionInfo->RewritePartition = FALSE;
|
|
|
|
/* Check if we're dealing with a partition that's in use */
|
|
if (PartitionType != PARTITION_ENTRY_UNUSED)
|
|
{
|
|
/* Check if it's bootable */
|
|
PartitionInfo->BootIndicator = PartitionDescriptor->
|
|
ActiveFlag & 0x80 ?
|
|
TRUE : FALSE;
|
|
|
|
/* Check if its' a container */
|
|
if (IsContainerPartition(PartitionType))
|
|
{
|
|
/* Then don't recognize it and use the volume offset */
|
|
PartitionInfo->RecognizedPartition = FALSE;
|
|
StartOffset = VolumeOffset.QuadPart;
|
|
}
|
|
else
|
|
{
|
|
/* Then recognize it and use the partition offset */
|
|
PartitionInfo->RecognizedPartition = TRUE;
|
|
StartOffset = Offset.QuadPart;
|
|
}
|
|
|
|
/* Get the starting offset */
|
|
PartitionInfo->StartingOffset.QuadPart =
|
|
StartOffset +
|
|
UInt32x32To64(GET_STARTING_SECTOR(PartitionDescriptor),
|
|
SectorSize);
|
|
|
|
/* Calculate the number of hidden sectors */
|
|
HiddenSectors64.QuadPart = (PartitionInfo->
|
|
StartingOffset.QuadPart -
|
|
StartOffset) /
|
|
SectorSize;
|
|
PartitionInfo->HiddenSectors = HiddenSectors64.LowPart;
|
|
|
|
/* Get the partition length */
|
|
PartitionInfo->PartitionLength.QuadPart =
|
|
UInt32x32To64(GET_PARTITION_LENGTH(PartitionDescriptor),
|
|
SectorSize);
|
|
|
|
/* FIXME: REACTOS HACK */
|
|
PartitionInfo->PartitionNumber = i + 1;
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, clear all the relevant fields */
|
|
PartitionInfo->BootIndicator = FALSE;
|
|
PartitionInfo->RecognizedPartition = FALSE;
|
|
PartitionInfo->StartingOffset.QuadPart = 0;
|
|
PartitionInfo->PartitionLength.QuadPart = 0;
|
|
PartitionInfo->HiddenSectors = 0;
|
|
|
|
/* FIXME: REACTOS HACK */
|
|
PartitionInfo->PartitionNumber = 0;
|
|
}
|
|
}
|
|
|
|
/* Finish debug log, and check for failure */
|
|
DPRINT("\n");
|
|
if (!NT_SUCCESS(Status)) break;
|
|
|
|
/* Also check if we hit an invalid entry here */
|
|
if (!IsValid)
|
|
{
|
|
/* We did, so break out of the loop minus one entry */
|
|
j--;
|
|
break;
|
|
}
|
|
|
|
/* Reset the offset */
|
|
Offset.QuadPart = 0;
|
|
|
|
/* Go back to the descriptor array and loop it */
|
|
PartitionDescriptor = (PPARTITION_DESCRIPTOR)
|
|
&(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);
|
|
for (Entry = 1; Entry <= 4; Entry++, PartitionDescriptor++)
|
|
{
|
|
/* Check if this is a container partition, since we skipped them */
|
|
if (IsContainerPartition(PartitionType))
|
|
{
|
|
/* Get its offset */
|
|
Offset.QuadPart = VolumeOffset.QuadPart +
|
|
UInt32x32To64(
|
|
GET_STARTING_SECTOR(PartitionDescriptor),
|
|
SectorSize);
|
|
|
|
/* If this is a primary partition, this is the volume offset */
|
|
if (IsPrimary) VolumeOffset = Offset;
|
|
|
|
/* Also update the maximum sector */
|
|
MaxSector = GET_PARTITION_LENGTH(PartitionDescriptor);
|
|
DPRINT1("FSTUB: MaxSector now = %#08lx\n", MaxSector);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Loop the next partitions, which are not primary anymore */
|
|
IsPrimary = FALSE;
|
|
} while (Offset.HighPart | Offset.LowPart);
|
|
|
|
/* Check if this is a removable device that's probably a super-floppy */
|
|
if ((DiskGeometry.MediaType == RemovableMedia) &&
|
|
!(j) &&
|
|
(MbrFound) &&
|
|
(IsEmpty))
|
|
{
|
|
/* Read the jump bytes to detect super-floppy */
|
|
if ((BootSectorInfo->JumpByte[0] == 0xeb) ||
|
|
(BootSectorInfo->JumpByte[0] == 0xe9))
|
|
{
|
|
/* Super floppes don't have typical MBRs, so skip them */
|
|
DPRINT1("FSTUB: Jump byte %#x found along with empty partition "
|
|
"table - disk is a super floppy and has no valid MBR\n",
|
|
BootSectorInfo->JumpByte);
|
|
j = -1;
|
|
}
|
|
}
|
|
|
|
/* Check if we're still at partition -1 */
|
|
if (j == -1)
|
|
{
|
|
/* The likely cause is the super floppy detection above */
|
|
if ((MbrFound) || (DiskGeometry.MediaType == RemovableMedia))
|
|
{
|
|
/* Print out debugging information */
|
|
DPRINT1("FSTUB: Drive %#p has no valid MBR. Make it into a "
|
|
"super-floppy\n",
|
|
DeviceObject);
|
|
DPRINT1("FSTUB: Drive has %#08lx sectors and is %#016I64x "
|
|
"bytes large\n",
|
|
EndSector, EndSector * DiskGeometry.BytesPerSector);
|
|
|
|
/* We should at least have some sectors */
|
|
if (EndSector > 0)
|
|
{
|
|
/* Get the entry we'll use */
|
|
PartitionInfo = &(*PartitionBuffer)->PartitionEntry[0];
|
|
|
|
/* Fill it out with data for a super-floppy */
|
|
PartitionInfo->RewritePartition = FALSE;
|
|
PartitionInfo->RecognizedPartition = TRUE;
|
|
PartitionInfo->PartitionType = PARTITION_FAT_16;
|
|
PartitionInfo->BootIndicator = FALSE;
|
|
PartitionInfo->HiddenSectors = 0;
|
|
PartitionInfo->StartingOffset.QuadPart = 0;
|
|
PartitionInfo->PartitionLength.QuadPart = (EndSector *
|
|
DiskGeometry.
|
|
BytesPerSector);
|
|
|
|
/* FIXME: REACTOS HACK */
|
|
PartitionInfo->PartitionNumber = 0;
|
|
|
|
/* Set the signature and set the count back to 0 */
|
|
(*PartitionBuffer)->Signature = 1;
|
|
i = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, this isn't a super floppy, so set an invalid count */
|
|
i = -1;
|
|
}
|
|
}
|
|
|
|
/* Set the partition count */
|
|
(*PartitionBuffer)->PartitionCount = ++i;
|
|
|
|
/* If we have no count, delete the signature */
|
|
if (!i) (*PartitionBuffer)->Signature = 0;
|
|
|
|
/* Free the buffer and check for success */
|
|
if (Buffer) ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
|
|
if (!NT_SUCCESS(Status)) ExFreePoolWithTag(*PartitionBuffer, TAG_FILE_SYSTEM);
|
|
|
|
/* Return status */
|
|
return Status;
|
|
}
|
|
|
|
NTSTATUS
|
|
FASTCALL
|
|
xHalIoSetPartitionInformation(IN PDEVICE_OBJECT DeviceObject,
|
|
IN ULONG SectorSize,
|
|
IN ULONG PartitionNumber,
|
|
IN ULONG PartitionType)
|
|
{
|
|
PIRP Irp;
|
|
KEVENT Event;
|
|
IO_STATUS_BLOCK IoStatusBlock;
|
|
NTSTATUS Status;
|
|
LARGE_INTEGER Offset, VolumeOffset;
|
|
PUCHAR Buffer = NULL;
|
|
ULONG BufferSize;
|
|
ULONG i = 0;
|
|
ULONG Entry;
|
|
PPARTITION_DESCRIPTOR PartitionDescriptor;
|
|
BOOLEAN IsPrimary = TRUE, IsEzDrive = FALSE;
|
|
PVOID MbrBuffer;
|
|
PIO_STACK_LOCATION IoStackLocation;
|
|
VolumeOffset.QuadPart = Offset.QuadPart = 0;
|
|
PAGED_CODE();
|
|
|
|
/* Normalize the buffer size */
|
|
BufferSize = max(512, SectorSize);
|
|
|
|
/* Check for EZ Drive */
|
|
HalExamineMBR(DeviceObject, BufferSize, 0x55, &MbrBuffer);
|
|
if (MbrBuffer)
|
|
{
|
|
/* EZ Drive found, bias the offset */
|
|
IsEzDrive = TRUE;
|
|
ExFreePool(MbrBuffer);
|
|
Offset.QuadPart = 512;
|
|
}
|
|
|
|
/* Allocate our partition buffer */
|
|
Buffer = ExAllocatePoolWithTag(NonPagedPool, PAGE_SIZE, TAG_FILE_SYSTEM);
|
|
if (!Buffer) return STATUS_INSUFFICIENT_RESOURCES;
|
|
|
|
/* Initialize the event we'll use and loop partitions */
|
|
KeInitializeEvent(&Event, NotificationEvent, FALSE);
|
|
do
|
|
{
|
|
/* Reset the event since we reuse it */
|
|
KeResetEvent(&Event);
|
|
|
|
/* Build the read IRP */
|
|
Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
|
|
DeviceObject,
|
|
Buffer,
|
|
BufferSize,
|
|
&Offset,
|
|
&Event,
|
|
&IoStatusBlock);
|
|
if (!Irp)
|
|
{
|
|
/* Fail */
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
break;
|
|
}
|
|
|
|
/* Make sure to disable volume verification */
|
|
IoStackLocation = IoGetNextIrpStackLocation(Irp);
|
|
IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
|
|
|
|
/* Call the driver */
|
|
Status = IoCallDriver(DeviceObject, Irp);
|
|
if (Status == STATUS_PENDING)
|
|
{
|
|
/* Wait for completion */
|
|
KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
|
|
Status = IoStatusBlock.Status;
|
|
}
|
|
|
|
/* Check for failure */
|
|
if (!NT_SUCCESS(Status)) break;
|
|
|
|
/* If we biased for EZ-Drive, unbias now */
|
|
if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;
|
|
|
|
/* Make sure this is a valid MBR */
|
|
if (((PUSHORT)Buffer)[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
|
|
{
|
|
/* It's not, fail */
|
|
Status = STATUS_BAD_MASTER_BOOT_RECORD;
|
|
break;
|
|
}
|
|
|
|
/* Get the partition descriptors and loop them */
|
|
PartitionDescriptor = (PPARTITION_DESCRIPTOR)
|
|
&(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);
|
|
for (Entry = 1; Entry <= 4; Entry++, PartitionDescriptor++)
|
|
{
|
|
/* Check if it's unused or a container partition */
|
|
if ((PartitionDescriptor->PartitionType ==
|
|
PARTITION_ENTRY_UNUSED) ||
|
|
(IsContainerPartition(PartitionDescriptor->PartitionType)))
|
|
{
|
|
/* Go to the next one */
|
|
continue;
|
|
}
|
|
|
|
/* It's a valid partition, so increase the partition count */
|
|
if (++i == PartitionNumber)
|
|
{
|
|
/* We found a match, set the type */
|
|
PartitionDescriptor->PartitionType = (UCHAR)PartitionType;
|
|
|
|
/* Reset the reusable event */
|
|
KeResetEvent(&Event);
|
|
|
|
/* Build the write IRP */
|
|
Irp = IoBuildSynchronousFsdRequest(IRP_MJ_WRITE,
|
|
DeviceObject,
|
|
Buffer,
|
|
BufferSize,
|
|
&Offset,
|
|
&Event,
|
|
&IoStatusBlock);
|
|
if (!Irp)
|
|
{
|
|
/* Fail */
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
break;
|
|
}
|
|
|
|
/* Disable volume verification */
|
|
IoStackLocation = IoGetNextIrpStackLocation(Irp);
|
|
IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
|
|
|
|
/* Call the driver */
|
|
Status = IoCallDriver(DeviceObject, Irp);
|
|
if (Status == STATUS_PENDING)
|
|
{
|
|
/* Wait for completion */
|
|
KeWaitForSingleObject(&Event,
|
|
Executive,
|
|
KernelMode,
|
|
FALSE,
|
|
NULL);
|
|
Status = IoStatusBlock.Status;
|
|
}
|
|
|
|
/* We're done, break out of the loop */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If we looped all the partitions, break out */
|
|
if (Entry <= NUM_PARTITION_TABLE_ENTRIES) break;
|
|
|
|
/* Nothing found yet, get the partition array again */
|
|
PartitionDescriptor = (PPARTITION_DESCRIPTOR)
|
|
&(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);
|
|
for (Entry = 1; Entry <= 4; Entry++, PartitionDescriptor++)
|
|
{
|
|
/* Check if this was a container partition (we skipped these) */
|
|
if (IsContainerPartition(PartitionDescriptor->PartitionType))
|
|
{
|
|
/* Update the partition offset */
|
|
Offset.QuadPart = VolumeOffset.QuadPart +
|
|
GET_STARTING_SECTOR(PartitionDescriptor) *
|
|
SectorSize;
|
|
|
|
/* If this was the primary partition, update the volume too */
|
|
if (IsPrimary) VolumeOffset = Offset;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Check if we already searched all the partitions */
|
|
if (Entry > NUM_PARTITION_TABLE_ENTRIES)
|
|
{
|
|
/* Then we failed to find a good MBR */
|
|
Status = STATUS_BAD_MASTER_BOOT_RECORD;
|
|
break;
|
|
}
|
|
|
|
/* Loop the next partitions, which are not primary anymore */
|
|
IsPrimary = FALSE;
|
|
} while (i < PartitionNumber);
|
|
|
|
/* Everything done, cleanup */
|
|
if (Buffer) ExFreePool(Buffer);
|
|
return Status;
|
|
}
|
|
|
|
NTSTATUS
|
|
FASTCALL
|
|
xHalIoWritePartitionTable(IN PDEVICE_OBJECT DeviceObject,
|
|
IN ULONG SectorSize,
|
|
IN ULONG SectorsPerTrack,
|
|
IN ULONG NumberOfHeads,
|
|
IN PDRIVE_LAYOUT_INFORMATION PartitionBuffer)
|
|
{
|
|
KEVENT Event;
|
|
IO_STATUS_BLOCK IoStatusBlock;
|
|
PIRP Irp;
|
|
NTSTATUS Status = STATUS_SUCCESS;
|
|
ULONG BufferSize;
|
|
PUSHORT Buffer;
|
|
PPTE Entry;
|
|
PPARTITION_TABLE PartitionTable;
|
|
LARGE_INTEGER Offset, NextOffset, ExtendedOffset, SectorOffset;
|
|
LARGE_INTEGER StartOffset, PartitionLength;
|
|
ULONG i, j;
|
|
CCHAR k;
|
|
BOOLEAN IsEzDrive = FALSE, IsSuperFloppy = FALSE, DoRewrite = FALSE, IsMbr;
|
|
ULONG ConventionalCylinders;
|
|
LONGLONG DiskSize;
|
|
PDISK_LAYOUT DiskLayout = (PDISK_LAYOUT)PartitionBuffer;
|
|
PVOID MbrBuffer;
|
|
UCHAR PartitionType;
|
|
PIO_STACK_LOCATION IoStackLocation;
|
|
PPARTITION_INFORMATION PartitionInfo = PartitionBuffer->PartitionEntry;
|
|
PPARTITION_INFORMATION TableEntry;
|
|
ExtendedOffset.QuadPart = NextOffset.QuadPart = Offset.QuadPart = 0;
|
|
PAGED_CODE();
|
|
|
|
/* Normalize the buffer size */
|
|
BufferSize = max(512, SectorSize);
|
|
|
|
/* Get the partial drive geometry */
|
|
xHalGetPartialGeometry(DeviceObject, &ConventionalCylinders, &DiskSize);
|
|
|
|
/* Check for EZ Drive */
|
|
HalExamineMBR(DeviceObject, BufferSize, 0x55, &MbrBuffer);
|
|
if (MbrBuffer)
|
|
{
|
|
/* EZ Drive found, bias the offset */
|
|
IsEzDrive = TRUE;
|
|
ExFreePool(MbrBuffer);
|
|
Offset.QuadPart = 512;
|
|
}
|
|
|
|
/* Get the number of bits to shift to multiply by the sector size */
|
|
for (k = 0; k < 32; k++) if ((SectorSize >> k) == 1) break;
|
|
|
|
/* Check if there's only one partition */
|
|
if (PartitionBuffer->PartitionCount == 1)
|
|
{
|
|
/* Check if it has no starting offset or hidden sectors */
|
|
if (!(PartitionInfo->StartingOffset.QuadPart) &&
|
|
!(PartitionInfo->HiddenSectors))
|
|
{
|
|
/* Then it's a super floppy */
|
|
IsSuperFloppy = TRUE;
|
|
|
|
/* Which also means it must be non-bootable FAT-16 */
|
|
if ((PartitionInfo->PartitionNumber) ||
|
|
(PartitionInfo->PartitionType != PARTITION_FAT_16) ||
|
|
(PartitionInfo->BootIndicator))
|
|
{
|
|
/* It's not, so we fail */
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Check if it needs a rewrite, and disable EZ drive for sure */
|
|
if (PartitionInfo->RewritePartition) DoRewrite = TRUE;
|
|
IsEzDrive = FALSE;
|
|
}
|
|
}
|
|
|
|
/* Count the number of partition tables */
|
|
DiskLayout->TableCount = (PartitionBuffer->PartitionCount + 4 - 1) / 4;
|
|
|
|
/* Allocate our partition buffer */
|
|
Buffer = ExAllocatePoolWithTag(NonPagedPool, PAGE_SIZE, TAG_FILE_SYSTEM);
|
|
if (!Buffer) return STATUS_INSUFFICIENT_RESOURCES;
|
|
|
|
/* Loop the entries */
|
|
Entry = (PPTE)&Buffer[PARTITION_TABLE_OFFSET];
|
|
for (i = 0; i < DiskLayout->TableCount; i++)
|
|
{
|
|
/* Set if this is the MBR partition */
|
|
IsMbr= (BOOLEAN)!i;
|
|
|
|
/* Initialize th event */
|
|
KeInitializeEvent(&Event, NotificationEvent, FALSE);
|
|
|
|
/* Build the read IRP */
|
|
Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
|
|
DeviceObject,
|
|
Buffer,
|
|
BufferSize,
|
|
&Offset,
|
|
&Event,
|
|
&IoStatusBlock);
|
|
if (!Irp)
|
|
{
|
|
/* Fail */
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
break;
|
|
}
|
|
|
|
/* Make sure to disable volume verification */
|
|
IoStackLocation = IoGetNextIrpStackLocation(Irp);
|
|
IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
|
|
|
|
/* Call the driver */
|
|
Status = IoCallDriver(DeviceObject, Irp);
|
|
if (Status == STATUS_PENDING)
|
|
{
|
|
/* Wait for completion */
|
|
KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
|
|
Status = IoStatusBlock.Status;
|
|
}
|
|
|
|
/* Check for failure */
|
|
if (!NT_SUCCESS(Status)) break;
|
|
|
|
/* If we biased for EZ-Drive, unbias now */
|
|
if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;
|
|
|
|
/* Check if this is a normal disk */
|
|
if (!IsSuperFloppy)
|
|
{
|
|
/* Set the boot record signature */
|
|
Buffer[BOOT_SIGNATURE_OFFSET] = BOOT_RECORD_SIGNATURE;
|
|
|
|
/* By default, don't require a rewrite */
|
|
DoRewrite = FALSE;
|
|
|
|
/* Check if we don't have an offset */
|
|
if (!Offset.QuadPart)
|
|
{
|
|
/* Check if the signature doesn't match */
|
|
if (((PULONG)Buffer)[PARTITION_TABLE_OFFSET / 2 - 1] !=
|
|
PartitionBuffer->Signature)
|
|
{
|
|
/* Then write the signature and now w need a rewrite */
|
|
((PULONG)Buffer)[PARTITION_TABLE_OFFSET / 2 - 1] =
|
|
PartitionBuffer->Signature;
|
|
DoRewrite = TRUE;
|
|
}
|
|
}
|
|
|
|
/* Loop the partition table entries */
|
|
PartitionTable = &DiskLayout->PartitionTable[i];
|
|
for (j = 0; j < 4; j++)
|
|
{
|
|
/* Get the current entry and type */
|
|
TableEntry = &PartitionTable->PartitionEntry[j];
|
|
PartitionType = TableEntry->PartitionType;
|
|
|
|
/* Check if the entry needs a rewrite */
|
|
if (TableEntry->RewritePartition)
|
|
{
|
|
/* Then we need one too */
|
|
DoRewrite = TRUE;
|
|
|
|
/* Save the type and if it's a bootable partition */
|
|
Entry[j].PartitionType = TableEntry->PartitionType;
|
|
Entry[j].ActiveFlag = TableEntry->BootIndicator ? 0x80 : 0;
|
|
|
|
/* Make sure it's used */
|
|
if (PartitionType != PARTITION_ENTRY_UNUSED)
|
|
{
|
|
/* Make sure it's not a container (unless primary) */
|
|
if ((IsMbr) || !(IsContainerPartition(PartitionType)))
|
|
{
|
|
/* Use the partition offset */
|
|
StartOffset.QuadPart = Offset.QuadPart;
|
|
}
|
|
else
|
|
{
|
|
/* Use the extended logical partition offset */
|
|
StartOffset.QuadPart = ExtendedOffset.QuadPart;
|
|
}
|
|
|
|
/* Set the sector offset */
|
|
SectorOffset.QuadPart = TableEntry->
|
|
StartingOffset.QuadPart -
|
|
StartOffset.QuadPart;
|
|
|
|
/* Now calculate the starting sector */
|
|
StartOffset.QuadPart = SectorOffset.QuadPart >> k;
|
|
Entry[j].StartingSector = StartOffset.LowPart;
|
|
|
|
/* As well as the length */
|
|
PartitionLength.QuadPart = TableEntry->PartitionLength.
|
|
QuadPart >> k;
|
|
Entry[j].PartitionLength = PartitionLength.LowPart;
|
|
|
|
/* Calculate the CHS values */
|
|
HalpCalculateChsValues(&TableEntry->StartingOffset,
|
|
&TableEntry->PartitionLength,
|
|
k,
|
|
SectorsPerTrack,
|
|
NumberOfHeads,
|
|
ConventionalCylinders,
|
|
(PPARTITION_DESCRIPTOR)
|
|
&Entry[j]);
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise set up an empty entry */
|
|
Entry[j].StartingSector = 0;
|
|
Entry[j].PartitionLength = 0;
|
|
Entry[j].StartingTrack = 0;
|
|
Entry[j].EndingTrack = 0;
|
|
Entry[j].StartingCylinder = 0;
|
|
Entry[j].EndingCylinder = 0;
|
|
}
|
|
}
|
|
|
|
/* Check if this is a container partition */
|
|
if (IsContainerPartition(PartitionType))
|
|
{
|
|
/* Then update the offset to use */
|
|
NextOffset = TableEntry->StartingOffset;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Check if we need to write back the buffer */
|
|
if (DoRewrite)
|
|
{
|
|
/* We don't need to do this again */
|
|
DoRewrite = FALSE;
|
|
|
|
/* Initialize the event */
|
|
KeInitializeEvent(&Event, NotificationEvent, FALSE);
|
|
|
|
/* If we unbiased for EZ-Drive, rebias now */
|
|
if ((IsEzDrive) && !(Offset.QuadPart)) Offset.QuadPart = 512;
|
|
|
|
/* Build the write IRP */
|
|
Irp = IoBuildSynchronousFsdRequest(IRP_MJ_WRITE,
|
|
DeviceObject,
|
|
Buffer,
|
|
BufferSize,
|
|
&Offset,
|
|
&Event,
|
|
&IoStatusBlock);
|
|
if (!Irp)
|
|
{
|
|
/* Fail */
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
break;
|
|
}
|
|
|
|
/* Make sure to disable volume verification */
|
|
IoStackLocation = IoGetNextIrpStackLocation(Irp);
|
|
IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
|
|
|
|
/* Call the driver */
|
|
Status = IoCallDriver(DeviceObject, Irp);
|
|
if (Status == STATUS_PENDING)
|
|
{
|
|
/* Wait for completion */
|
|
KeWaitForSingleObject(&Event,
|
|
Executive,
|
|
KernelMode,
|
|
FALSE,
|
|
NULL);
|
|
Status = IoStatusBlock.Status;
|
|
}
|
|
|
|
/* Check for failure */
|
|
if (!NT_SUCCESS(Status)) break;
|
|
|
|
/* If we biased for EZ-Drive, unbias now */
|
|
if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;
|
|
}
|
|
|
|
/* Update the partition offset and set the extended offset if needed */
|
|
Offset = NextOffset;
|
|
if (IsMbr) ExtendedOffset = NextOffset;
|
|
}
|
|
|
|
/* If we had a buffer, free it, then return status */
|
|
if (Buffer) ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
|
|
return Status;
|
|
}
|
|
|
|
/* PUBLIC FUNCTIONS **********************************************************/
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
VOID
|
|
FASTCALL
|
|
HalExamineMBR(IN PDEVICE_OBJECT DeviceObject,
|
|
IN ULONG SectorSize,
|
|
IN ULONG MbrTypeIdentifier,
|
|
OUT PVOID *MbrBuffer)
|
|
{
|
|
HALDISPATCH->HalExamineMBR(DeviceObject,
|
|
SectorSize,
|
|
MbrTypeIdentifier,
|
|
MbrBuffer);
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
FASTCALL
|
|
IoReadPartitionTable(IN PDEVICE_OBJECT DeviceObject,
|
|
IN ULONG SectorSize,
|
|
IN BOOLEAN ReturnRecognizedPartitions,
|
|
IN OUT PDRIVE_LAYOUT_INFORMATION *PartitionBuffer)
|
|
{
|
|
return HALDISPATCH->HalIoReadPartitionTable(DeviceObject,
|
|
SectorSize,
|
|
ReturnRecognizedPartitions,
|
|
PartitionBuffer);
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
FASTCALL
|
|
IoSetPartitionInformation(IN PDEVICE_OBJECT DeviceObject,
|
|
IN ULONG SectorSize,
|
|
IN ULONG PartitionNumber,
|
|
IN ULONG PartitionType)
|
|
{
|
|
return HALDISPATCH->HalIoSetPartitionInformation(DeviceObject,
|
|
SectorSize,
|
|
PartitionNumber,
|
|
PartitionType);
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS
|
|
FASTCALL
|
|
IoWritePartitionTable(IN PDEVICE_OBJECT DeviceObject,
|
|
IN ULONG SectorSize,
|
|
IN ULONG SectorsPerTrack,
|
|
IN ULONG NumberOfHeads,
|
|
IN PDRIVE_LAYOUT_INFORMATION PartitionBuffer)
|
|
{
|
|
return HALDISPATCH->HalIoWritePartitionTable(DeviceObject,
|
|
SectorSize,
|
|
SectorsPerTrack,
|
|
NumberOfHeads,
|
|
PartitionBuffer);
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
VOID
|
|
FASTCALL
|
|
IoAssignDriveLetters(IN PLOADER_PARAMETER_BLOCK LoaderBlock,
|
|
IN PSTRING NtDeviceName,
|
|
OUT PUCHAR NtSystemPath,
|
|
OUT PSTRING NtSystemPathString)
|
|
{
|
|
HALDISPATCH->HalIoAssignDriveLetters(LoaderBlock,
|
|
NtDeviceName,
|
|
NtSystemPath,
|
|
NtSystemPathString);
|
|
}
|
|
|
|
/* EOF */
|