mirror of
https://github.com/reactos/reactos.git
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202 lines
5.6 KiB
C
202 lines
5.6 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: services/fs/ext2/super.c
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* PURPOSE: ext2 filesystem
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* PROGRAMMER: David Welch (welch@mcmail.com)
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* UPDATE HISTORY:
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*/
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/* INCLUDES *****************************************************************/
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#include <ntddk.h>
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//#define NDEBUG
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#include <debug.h>
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#include "ext2fs.h"
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/* GLOBALS *****************************************************************/
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static PDRIVER_OBJECT DriverObject;
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/* FUNCTIONS ****************************************************************/
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NTSTATUS STDCALL
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Ext2Close(PDEVICE_OBJECT DeviceObject, PIRP Irp)
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{
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PIO_STACK_LOCATION Stack;
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PFILE_OBJECT FileObject;
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PDEVICE_EXTENSION DeviceExtension;
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NTSTATUS Status;
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PEXT2_FCB Fcb;
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DbgPrint("Ext2Close(DeviceObject %x, Irp %x)\n",DeviceObject,Irp);
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Stack = IoGetCurrentIrpStackLocation(Irp);
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FileObject = Stack->FileObject;
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DeviceExtension = DeviceObject->DeviceExtension;
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if (FileObject == DeviceExtension->FileObject)
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{
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Status = STATUS_SUCCESS;
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Irp->IoStatus.Status = Status;
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Irp->IoStatus.Information = 0;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return(Status);
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}
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Fcb = (PEXT2_FCB)FileObject->FsContext;
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if (Fcb != NULL)
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{
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if (Fcb->Bcb != NULL)
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{
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CcRosReleaseFileCache(FileObject, Fcb->Bcb);
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}
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ExFreePool(Fcb);
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FileObject->FsContext = NULL;
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}
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Status = STATUS_SUCCESS;
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Irp->IoStatus.Status = Status;
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Irp->IoStatus.Information = 0;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return(Status);
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}
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NTSTATUS Ext2Mount(PDEVICE_OBJECT DeviceToMount)
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{
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PDEVICE_OBJECT DeviceObject;
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PDEVICE_EXTENSION DeviceExt;
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PVOID BlockBuffer;
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struct ext2_super_block* superblock;
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DPRINT("Ext2Mount(DeviceToMount %x)\n",DeviceToMount);
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BlockBuffer = ExAllocatePool(NonPagedPool,BLOCKSIZE);
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Ext2ReadSectors(DeviceToMount,
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1,
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1,
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BlockBuffer);
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superblock = BlockBuffer;
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if (superblock->s_magic != EXT2_SUPER_MAGIC)
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{
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ExFreePool(BlockBuffer);
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return(STATUS_UNRECOGNIZED_VOLUME);
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}
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DPRINT("Volume recognized\n");
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DPRINT("s_inodes_count %d\n",superblock->s_inodes_count);
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DPRINT("s_blocks_count %d\n",superblock->s_blocks_count);
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IoCreateDevice(DriverObject,
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sizeof(DEVICE_EXTENSION),
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NULL,
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FILE_DEVICE_FILE_SYSTEM,
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0,
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FALSE,
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&DeviceObject);
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DPRINT("DeviceObject %x\n",DeviceObject);
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DeviceObject->Flags = DeviceObject->Flags | DO_DIRECT_IO;
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DeviceExt = (PVOID)DeviceObject->DeviceExtension;
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DPRINT("DeviceExt %x\n",DeviceExt);
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DeviceExt->StorageDevice = DeviceToMount;
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DeviceExt->StorageDevice->Vpb->DeviceObject = DeviceObject;
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DeviceExt->StorageDevice->Vpb->RealDevice = DeviceExt->StorageDevice;
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DeviceExt->StorageDevice->Vpb->Flags |= VPB_MOUNTED;
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DeviceObject->StackSize = DeviceExt->StorageDevice->StackSize + 1;
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DeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
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DPRINT("DeviceExt->StorageDevice %x\n", DeviceExt->StorageDevice);
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DeviceExt->FileObject = IoCreateStreamFileObject(NULL, DeviceObject);
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DeviceExt->superblock = superblock;
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CcRosInitializeFileCache(DeviceExt->FileObject,
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&DeviceExt->Bcb,
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PAGE_SIZE * 3);
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DPRINT("Ext2Mount() = STATUS_SUCCESS\n");
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return(STATUS_SUCCESS);
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}
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NTSTATUS STDCALL
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Ext2FileSystemControl(PDEVICE_OBJECT DeviceObject, PIRP Irp)
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{
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PIO_STACK_LOCATION Stack = IoGetCurrentIrpStackLocation(Irp);
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PVPB vpb = Stack->Parameters.Mount.Vpb;
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PDEVICE_OBJECT DeviceToMount = Stack->Parameters.Mount.DeviceObject;
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NTSTATUS Status;
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Status = Ext2Mount(DeviceToMount);
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Irp->IoStatus.Status = Status;
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Irp->IoStatus.Information = 0;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return(Status);
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}
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NTSTATUS STDCALL
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DriverEntry(PDRIVER_OBJECT _DriverObject,
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PUNICODE_STRING RegistryPath)
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/*
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* FUNCTION: Called by the system to initalize the driver
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* ARGUMENTS:
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* DriverObject = object describing this driver
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* RegistryPath = path to our configuration entries
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* RETURNS: Success or failure
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*/
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{
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PDEVICE_OBJECT DeviceObject;
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NTSTATUS ret;
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UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Device\\Ext2Fsd");
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DbgPrint("Ext2 FSD 0.0.1\n");
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DriverObject = _DriverObject;
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ret = IoCreateDevice(DriverObject,
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0,
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&DeviceName,
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FILE_DEVICE_FILE_SYSTEM,
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0,
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FALSE,
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&DeviceObject);
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if (ret!=STATUS_SUCCESS)
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{
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return(ret);
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}
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DeviceObject->Flags=0;
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DriverObject->MajorFunction[IRP_MJ_CLOSE] = Ext2Close;
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DriverObject->MajorFunction[IRP_MJ_CREATE] = Ext2Create;
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DriverObject->MajorFunction[IRP_MJ_READ] = Ext2Read;
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DriverObject->MajorFunction[IRP_MJ_WRITE] = Ext2Write;
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DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] =
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Ext2FileSystemControl;
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DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] =
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Ext2DirectoryControl;
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DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] =
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Ext2QueryInformation;
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DriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] = Ext2SetInformation;
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DriverObject->MajorFunction[IRP_MJ_FLUSH_BUFFERS] = Ext2FlushBuffers;
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DriverObject->MajorFunction[IRP_MJ_SHUTDOWN] = Ext2Shutdown;
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DriverObject->MajorFunction[IRP_MJ_CLEANUP] = Ext2Cleanup;
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DriverObject->MajorFunction[IRP_MJ_QUERY_SECURITY] = Ext2QuerySecurity;
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DriverObject->MajorFunction[IRP_MJ_SET_SECURITY] = Ext2SetSecurity;
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DriverObject->MajorFunction[IRP_MJ_QUERY_QUOTA] = Ext2QueryQuota;
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DriverObject->MajorFunction[IRP_MJ_SET_QUOTA] = Ext2SetQuota;
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DriverObject->DriverUnload = NULL;
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IoRegisterFileSystem(DeviceObject);
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return(STATUS_SUCCESS);
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}
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