驱动开发之基本数据结构
作者：互联网
根据MSDN的介绍，自己对一些基本结构做一些翻译，帮助自己理解。
驱动对象 DRIVER_OBJECT
typedef struct _DRIVER_OBJECT {
CSHORT Type;
CSHORT Size;
PDEVICE_OBJECT DeviceObject;
ULONG Flags;
PVOID DriverStart;
ULONG DriverSize;
PVOID DriverSection;
PDRIVER_EXTENSION DriverExtension;
UNICODE_STRING DriverName;
PUNICODE_STRING HardwareDatabase;
PFAST_IO_DISPATCH FastIoDispatch;
PDRIVER_INITIALIZE DriverInit;
PDRIVER_STARTIO DriverStartIo;
PDRIVER_UNLOAD DriverUnload;
PDRIVER_DISPATCH MajorFunction[IRP_MJ_MAXIMUM_FUNCTION + 1];
} DRIVER_OBJECT, *PDRIVER_OBJECT;
DeviceObject
指向驱动创建的设备对象的指针。当驱动成功调用IoCreateDevice时，这个成员会自动更新。驱动可以用这个成员和 DEVICE_OBJECT 的 NextDevice 成员去遍历驱动创建的所有设备对象（A driver can use this member and the NextDevice member of DEVICE_OBJECT to step through a list of all the device objects that the driver created.）
DriverExtension
指向驱动扩展的指针。驱动扩展的唯一可访问成员是 DriverExtension->AddDevice，驱动的 DriverEntry 例程存储了驱动的 AddDevice例程。（The only accessible member of the driver extension is DriverExtension->AddDevice, into which a driver's DriverEntry routine stores the driver's AddDevice routine.）
HardwareDatabase
指向路径 \Registry\Machine\Hardware ，在这个注册表路径存储着硬件的配置信息。（Pointer to the \Registry\Machine\Hardware path to the hardware configuration information in the registry.）
FastIoDispatch
指向一个定义驱动的 fast I/O 入口的指针的指针。这个成员仅仅在FSDs个网络传输驱动里面使用。
DriverInit
由 I/O 管理器设置的 DriverEntry 例程的入口点。
DriverStartIo
驱动的 StartIo 例程的入口点。如果有的话，当驱动初始化的时候，DriverEntry将会设置这个值；如果驱动没有 StartIo例程，这个成员就是 NULL。
DriverUnload
驱动的卸载例程的入口点。如果有的话，DriverEntry将在驱动初始化的时候设置这个值；如果驱动没有卸载例程，这个成员就是 NULL。
MajorFunction[IRP_MJ_MAXIMUM_FUNCTION + 1]
由驱动的 DispatchXxx 例程的入口点组成的 Dispatch 表。数组的索引值IRP_MJ_XXX 对应着 IRP 主要函数编码。每个驱动都必须给驱动处理的 IRP_MJ_XXX 请求通过这个数组设置入口点。更多信息可以查看 Writing Dispatch Routines。
设备对象 DEVICE_OBJECT
typedef struct _DEVICE_OBJECT {
CSHORT Type;
USHORT Size;
LONG ReferenceCount;
struct _DRIVER_OBJECT *DriverObject;
struct _DEVICE_OBJECT *NextDevice;
struct _DEVICE_OBJECT *AttachedDevice;
struct _IRP *CurrentIrp;
PIO_TIMER Timer;
ULONG Flags;
ULONG Characteristics;
__volatile PVPB Vpb;
PVOID DeviceExtension;
DEVICE_TYPE DeviceType;
CCHAR StackSize;
union {
LIST_ENTRY ListEntry;
WAIT_CONTEXT_BLOCK Wcb;
} Queue;
ULONG AlignmentRequirement;
KDEVICE_QUEUE DeviceQueue;
KDPC Dpc;
ULONG ActiveThreadCount;
PSECURITY_DESCRIPTOR SecurityDescriptor;
KEVENT DeviceLock;
USHORT SectorSize;
USHORT Spare1;
struct _DEVOBJ_EXTENSION *DeviceObjectExtension;
PVOID Reserved;
} DEVICE_OBJECT, *PDEVICE_OBJECT;
文件对象 DEVICE_OBJECT
typedef struct _ILE_OBJECT {
CSHORT Type;
CSHORT Size;
PDEVICE_OBJECT DeviceObject;
PVPB Vpb;
PVOID FsContext;
PVOID FsContext2;
PSECTION_OBJECT_POINTERS SectionObjectPointer;
PVOID PrivateCacheMap;
NTSTATUS FinalStatus;
struct _FILE_OBJECT *RelatedFileObject;
BOOLEAN LockOperation;
BOOLEAN DeletePending;
BOOLEAN ReadAccess;
BOOLEAN WriteAccess;
BOOLEAN DeleteAccess;
BOOLEAN SharedRead;
BOOLEAN SharedWrite;
BOOLEAN SharedDelete;
ULONG Flags;
UNICODE_STRING FileName;
LARGE_INTEGER CurrentByteOffset;
__volatile ULONG Waiters;
__volatile ULONG Busy;
PVOID LastLock;
KEVENT Lock;
KEVENT Event;
__volatile PIO_COMPLETION_CONTEXT CompletionContext;
KSPIN_LOCK IrpListLock;
LIST_ENTRY IrpList;
__volatile PVOID FileObjectExtension;
} FILE_OBJECT, *PFILE_OBJECT;