reactos/rosapps/ramdrv/minix/mount.c

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/*
* ReactOS kernel
* Copyright (C) 2000 David Welch <welch@cwcom.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* PROJECT: ReactOS kernel
* FILE: services/fs/minix/minix.c
* PURPOSE: Minix FSD
* PROGRAMMER: David Welch (welch@mcmail.com)
* UPDATE HISTORY:
*/
/* INCLUDES *****************************************************************/
#include <ntddk.h>
#include <ntifs.h>
//#define NDEBUG
#include <debug.h>
#include "minix.h"
/* GLOBALS *******************************************************************/
static PDRIVER_OBJECT DriverObject;
/* FUNCTIONS ****************************************************************/
VOID MinixMount(PDEVICE_OBJECT DeviceToMount)
{
PDEVICE_OBJECT DeviceObject;
MINIX_DEVICE_EXTENSION* DeviceExt;
IoCreateDevice(DriverObject,
sizeof(MINIX_DEVICE_EXTENSION),
NULL,
FILE_DEVICE_FILE_SYSTEM,
0,
FALSE,
&DeviceObject);
DeviceObject->Flags = DeviceObject->Flags | DO_DIRECT_IO;
DeviceExt = DeviceObject->DeviceExtension;
MinixReadSector(DeviceToMount,1,DeviceExt->superblock_buf);
DeviceExt->sb = (struct minix_super_block *)(DeviceExt->superblock_buf);
DeviceExt->StorageDevice = DeviceToMount;
DeviceExt->StorageDevice->Vpb->DeviceObject = DeviceObject;
DeviceExt->StorageDevice->Vpb->RealDevice = DeviceExt->StorageDevice;
DeviceExt->StorageDevice->Vpb->Flags |= VPB_MOUNTED;
DeviceObject->StackSize = DeviceExt->StorageDevice->StackSize + 1;
DeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
DeviceExt->FileObject = IoCreateStreamFileObject(NULL, DeviceObject);
}
NTSTATUS STDCALL
MinixFileSystemControl(PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
PIO_STACK_LOCATION Stack = IoGetCurrentIrpStackLocation(Irp);
// PVPB vpb = Stack->Parameters.Mount.Vpb;
PDEVICE_OBJECT DeviceToMount = Stack->Parameters.Mount.DeviceObject;
NTSTATUS Status;
char* superblock_buf;
struct minix_super_block* sb;
DbgPrint("MinixFileSystemControl(DeviceObject %x, Irp %x)\n",DeviceObject,
Irp);
DPRINT("DeviceToMount %x\n",DeviceToMount);
superblock_buf = ExAllocatePool(NonPagedPool,BLOCKSIZE);
DPRINT("MinixReadSector %x\n",MinixReadSector);
MinixReadSector(DeviceToMount,1,superblock_buf);
sb = (struct minix_super_block *)superblock_buf;
DPRINT("Magic %x\n",sb->s_magic);
DPRINT("Imap blocks %x\n",sb->s_imap_blocks);
DPRINT("Zmap blocks %x\n",sb->s_zmap_blocks);
if (sb->s_magic==MINIX_SUPER_MAGIC2)
{
DPRINT("%s() = STATUS_SUCCESS\n",__FUNCTION__);
MinixMount(DeviceToMount);
Status = STATUS_SUCCESS;
}
else
{
DPRINT("%s() = STATUS_UNRECOGNIZED_VOLUME\n",__FUNCTION__);
Status = STATUS_UNRECOGNIZED_VOLUME;
}
Irp->IoStatus.Status = Status;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return(Status);
}
NTSTATUS STDCALL
DriverEntry(PDRIVER_OBJECT _DriverObject,
PUNICODE_STRING RegistryPath)
/*
* FUNCTION: Called by the system to initalize the driver
* ARGUMENTS:
* DriverObject = object describing this driver
* RegistryPath = path to our configuration entries
* RETURNS: Success or failure
*/
{
PDEVICE_OBJECT DeviceObject;
NTSTATUS ret;
UNICODE_STRING DeviceName;
DbgPrint("Minix FSD 0.0.1\n");
DriverObject = _DriverObject;
RtlInitUnicodeString(&DeviceName,
L"\\Device\\Minix");
ret = IoCreateDevice(DriverObject,
0,
&DeviceName,
FILE_DEVICE_FILE_SYSTEM,
0,
FALSE,
&DeviceObject);
if (!NT_SUCCESS(ret))
{
return(ret);
}
DeviceObject->Flags = 0;
DriverObject->MajorFunction[IRP_MJ_CLOSE] = MinixClose;
DriverObject->MajorFunction[IRP_MJ_CREATE] = MinixCreate;
DriverObject->MajorFunction[IRP_MJ_READ] = MinixRead;
DriverObject->MajorFunction[IRP_MJ_WRITE] = MinixWrite;
DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] =
MinixFileSystemControl;
DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] =
MinixDirectoryControl;
DriverObject->DriverUnload = NULL;
IoRegisterFileSystem(DeviceObject);
return(STATUS_SUCCESS);
}