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A few minor changes

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svn path=/trunk/; revision=2585
This commit is contained in:
Phillip Susi 2002-01-31 20:22:00 +00:00
parent 8acb48f0de
commit 8e5647c51a
1 changed files with 66 additions and 25 deletions
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91
reactos/drivers/dd/ramdrv/ramdrv.c
View file

@ -1,6 +1,7 @@
#include <ntddk.h>
#include "ramdrv.h"
#include <debug.h>
#include "../../../lib/bzip2/bzlib.h"
NTSTATUS STDCALL RamdrvDispatchReadWrite(PDEVICE_OBJECT DeviceObject,
PIRP Irp)
@ -51,6 +52,9 @@ NTSTATUS STDCALL DriverEntry(IN PDRIVER_OBJECT DriverObject,
IO_STATUS_BLOCK iosb;
LARGE_INTEGER allocsize;
HANDLE event;
void *tbuff;
unsigned int dstlen = 1024 * 1440;
FILE_STANDARD_INFORMATION finfo;
DbgPrint("Ramdisk driver\n");
@ -80,38 +84,35 @@ NTSTATUS STDCALL DriverEntry(IN PDRIVER_OBJECT DriverObject,
devext->Buffer = ExAllocatePool( PagedPool, devext->Size );
if( !devext->Buffer )
{
IoDeleteDevice( DeviceObject );
return STATUS_INSUFFICIENT_RESOURCES;
Status = STATUS_INSUFFICIENT_RESOURCES;
goto cleandevice;
}
RtlInitUnicodeString( &LinkName, L"\\ArcName\\virt(0)disk(0)ram(0)" );
IoAssignArcName( &LinkName, &DeviceName );
RtlInitUnicodeString( &LinkName, L"\\??\\Z:" );
IoCreateSymbolicLink( &LinkName, &DeviceName );
RtlInitUnicodeString( &LinkName, L"\\Device\\Floppy0" );
RtlInitUnicodeString( &LinkName, L"\\Device\\Floppy0\\ramdisk.bz2" );
InitializeObjectAttributes( &objattr,
&LinkName,
0,
0,
0 );
allocsize.u.LowPart = allocsize.u.HighPart = 0;
Status = NtCreateFile( &file,
GENERIC_READ | GENERIC_WRITE,
Status = NtOpenFile( &file,
GENERIC_READ,
&objattr,
&iosb,
&allocsize,
0,
0,
OPEN_EXISTING,
0,
0,
0 );
FILE_SHARE_READ,
FILE_NO_INTERMEDIATE_BUFFERING );
if( !NT_SUCCESS( Status ) )
{
DPRINT( "Failed to open floppy\n" );
return STATUS_SUCCESS;
goto cleanbuffer;
}
InitializeObjectAttributes( &objattr,
0,
0,
@ -125,36 +126,76 @@ NTSTATUS STDCALL DriverEntry(IN PDRIVER_OBJECT DriverObject,
if( !NT_SUCCESS( Status ) )
{
DPRINT( "Failed to create event\n" );
NtClose( file );
return STATUS_SUCCESS;
goto cleanfile;
}
Status = NtQueryInformationFile( file,
&iosb,
&finfo,
sizeof( finfo ),
FileStandardInformation );
if( !NT_SUCCESS( Status ) )
{
DPRINT1( "Failed to query file information\n" );
goto cleanevent;
}
tbuff = ExAllocatePool( PagedPool, finfo.EndOfFile.u.LowPart );
if( !tbuff )
{
DPRINT1( "Failed to allocate buffer of size %d\n", finfo.EndOfFile.u.LowPart );
Status = STATUS_INSUFFICIENT_RESOURCES;
goto cleanevent;
}
Status = NtReadFile( file,
event,
0,
0,
&iosb,
devext->Buffer,
1440 * 1024,
tbuff,
finfo.EndOfFile.u.LowPart,
&allocsize,
0 );
if( !NT_SUCCESS( Status ) )
{
NtClose( file );
NtClose( event );
DPRINT( "Failed to read floppy\n" );
return STATUS_SUCCESS;
goto cleantbuff;
}
Status = NtWaitForSingleObject( event, FALSE, 0 );
if( Status != STATUS_WAIT_0 || !NT_SUCCESS( iosb.Status ) )
{
DPRINT( "Failed to read floppy\n" );
NtClose( file );
NtClose( event );
return STATUS_SUCCESS;
goto cleantbuff;
}
DPRINT( "Read in %d bytes, decompressing now\n", iosb.Information );
asm( "int3" );
BZ2_bzBuffToBuffDecompress( devext->Buffer,
&dstlen,
tbuff,
iosb.Information,
1,
0 );
DPRINT( "Decompressed\n" );
ExFreePool( tbuff );
NtClose( file );
NtClose( event );
return STATUS_SUCCESS;
cleantbuff:
ExFreePool( tbuff );
cleanevent:
NtClose( event );
cleanfile:
NtClose( file );
cleanbuffer:
ExFreePool( devext->Buffer );
cleandevice:
IoDeleteDevice( DeviceObject );
for(;;);
return Status;
}