Modifying the Parameters for an I/O Operation

过滤驱动IO参数修改机制
最新推荐文章于 2025-06-25 11:15:10 发布
翻译 最新推荐文章于 2025-06-25 11:15:10 发布 · 543 阅读 · 1

本文介绍了过滤驱动如何通过修改IO操作参数实现如重定向等功能，详细解释了preoperation及postoperation回调函数如何处理这些修改，并说明了如何通知过滤管理器参数已被更改。

A minifilter driver can modify the parameters for an I/O operation. For example, a minifilter driver's preoperation callback routine can redirect an I/O operation to a different volume by changing the target instance for the operation. The new target instance must be an instance of the same minifilter driver at the same altitude on another volume.

过滤驱动可以修改IO操作的参数，例如，preoperation回调函数可以修改目标实例将IO操作重定向至一个不同的卷，新的实例必须是同一个过滤驱动附载在另一个卷的实例，并且处于相同的维度。

The parameters for an I/O operation are found in the callback data (FLT_CALLBACK_DATA) structure and I/O parameter block (FLT_IO_PARAMETER_BLOCK) structure for the operation. The minifilter driver's preoperation callback routine and postoperation callback routine receive a pointer to the callback data structure for the operation in the Data input parameter. The Iopb member of the callback data structure is a pointer to an I/O parameter block structure that contains the parameters for the operation.

在回调数据结构FLT_CALLBACK_DATA及IO参数块FLT_IO_PARAMETER_BLOCK中保存着操作的参数，preoperation及postoperation回调函数的参数Data保存着操作擦数，参数Data的成员Iopb指向了IO操作参数块。

If a minifilter driver's preoperation callback routine modifies the parameters for an I/O operation, all minifilter drivers below that minifilter driver in the minifilter driver instance stack will receive the modified parameters in their preoperation and postoperation callback routines.

如果preoperation回调函数修改了IO参数，处于其之下的过滤驱动将在其的preoperation及postoperation回调函数中接收修改后的参数。

The modified parameters are not received by the current minifilter driver's postoperation callback routine or by any minifilter drivers above that minifilter driver in the minifilter driver instance stack. In all situations, a minifilter driver's preoperation and postoperation callback routines receive the same input parameter values for a given I/O operation.

请注意，当前过滤驱动及上层的过滤驱动的postoperation回调函数不会接收修改后的参数。在任何情况下，过滤驱动的preoperation及postoperation回调函数接收相同的IO操作参数。

After modifying the parameters for an I/O operation, the preoperation or postoperation callback routine must indicate that it has done so by calling FltSetCallbackDataDirty, unless it has changed the contents of the callback data structure's IoStatus field. Otherwise, the filter manager will ignore any changes to parameter values. FltSetCallbackDataDirty sets the FLTFL_CALLBACK_DATA_DIRTY flag in the callback data structure for the I/O operation. Minifilter drivers can test this flag by calling FltIsCallbackDataDirty or clear it by calling FltClearCallbackDataDirty. 

修改IO操作参数后，preoperation及postoperation回调函数必须调用FltSetCallbackDataDirty已表明自己修改了参数，除非是回调数据结构的IoStatus成员，否则，过滤管理器会忽略对参数的修改，FltSetCallbackDataDirty设置FLTFL_CALLBACK_DATA_DIRTY标志。过滤驱动可以调用FltIsCallbackDataDirty 测试这个标志或者FltClearCallbackDataDirty清除这个标志。

If a minifilter driver's preoperation callback routine modifies the parameters for an I/O operation, all minifilter drivers below that minifilter driver in the minifilter driver instance stack will receive the modified parameters in the Data and FltObjects input parameters to their preoperation and postoperation callback routines. (Minifilter drivers cannot directly modify the contents of the FLT_RELATED_OBJECTS structure that is pointed to by the FltObjects parameter. However, if a minifilter driver modifies the target instance or target file object for an I/O operation, the filter manager modifies the value of the corresponding Instance or FileObject member of the FLT_RELATED_OBJECTS structure that is passed to lower minifilter drivers.)

如果minifilter驱动的preoperation回调函数修改了IO参数，下层的过滤驱动将在preoperation及postoperation回调函数参数Data及FltObject接收修改后的参数。过滤驱动不能直接修改参数FltObjects 指向的FLT_RELATED_OBJECTS 数据结构，但是，如果过滤驱动修改了目标实例或者目标文件对象，过滤管理器在修改传递到下层过滤驱动FLT_RELATED_OBJECTS结构体中对应的Instance或者FileObject成员。

Although any parameter changes that a minifilter driver's preoperation callback routine makes are not received by the minifilter driver's own postoperation callback routine, a preoperation callback routine is able to pass information about changed parameters to the minifilter driver's own postoperation callback routine. If the preoperation callback routine passes the I/O operation down the stack by returning FLT_PREOP_SUCCESS_WITH_CALLBACK or FLT_PREOP_SYNCHRONIZE, it can store information about changed parameter values into a minifilter driver–defined structure that is pointed to by the CompletionContext output parameter. The filter manager passes this structure pointer in the CompletionContext input parameter to the postoperation callback routine. 

虽然过滤驱动自己postoperation回调函数不会接收修改后的参数，peroperation回调函数可以将修改的参数信息传递给postoperation回调函数，如果peroperation回调函数返回 FLT_PREOP_SUCCESS_WITH_CALLBACK or FLT_PREOP_SYNCHRONIZE，驱动可以在输出参数CompletionContext 保存驱动自定义的结构中保存参数修改过信息。

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using pointers. 5. What is the rule for omitting the size of dimensions when initializing and when passing a multidimensional array to a function? Why is it allowed to omit only the first dimension? 6. Explain the principle of "row-major order" for storing two-dimensional arrays in memory.
How does this affect element access? 7. Why are nested loops the standard tool for processing multidimensional arrays?
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最新发布
11-23
for(int i = 0; i ; ++i) for(int j = 0; j ; ++j) cout [i][j]; ``` --- ### **第六部分：字符串** 1. **C风格字符串存储与空终止符：** 字符串以字符数组形式存储，末尾加 `\0`（ASCII 0）作为结束标志。...
minifilter----FLT_CALLBACK_DATA
DOTM的专栏
11-05 1003
One very important structure that everyone writing minifilters very quickly becomes familiar is the FLT_CALLBACK_DATA. This is pretty much the equivalent of an IRP in the minifilter model. The structu
Minifilter
qq_41490873的博客
09-17 1805
Minifilter特点 在Minifilter框架中,不在需要自己去写代码生成设备,去绑定卷.这些框架已经做好了.唯一需要我们做的就是在Callback中处理我们感兴趣的回调函数而已. 创建文件 使用FltCreateFile 不能再使用ZwCreateFile 通信方式 在minifilter中改为通过端口通信. 驱动加载 使用inf文件安装 然后使用命令net start +驱动名 或者使用代码的方式加载,与NT驱动不同的是,需要新增两个注册表键值. Minifilter的注册 CONST FLT_
基于Minifilter框架的文件过滤驱动理解
aguchu2119的博客
03-18 800
概述 Minifilter即File System Minifilter Drivers，是Windows为了简化第三方开发人员开发文件过滤驱动而提供的一套框架，这个框架依赖于一个称之为Filter Manager（后面简写为FltMgr)的传统文件系统过滤驱动。这套框架应用到内核中的结构如下图所示： FltMgr以传统文件过滤驱动的形式插入到I/O处理队列中去接收不同的I/...
Windows驱动_文件系统微小过滤驱动之一初识MiniFilter
Z18_28_19的专栏
10-23 7166
人的一生，就那么几十年，所有的人都无法知道下一刻会发生什么，我们活在当下，只能努力将自己目前的工作或生活过好。船到桥头自然直，况且，自己这么多年，经历了多多少少的风浪太多了，说到底还是不够自信，我应该慢慢改正这个缺点。不要事事都杞人忧天，一定的危机感是需要的，但是千万不要过了。           由于原始的文件系统过滤驱动有一些缺陷，它使用了一些非常规的方法，有些驱动微软都无法做到全部的控
文件系统Minifilter驱动(四)
听风
03-02 4508
四、控制Filter管理器操作在早于Vista的Windows中，filter管理器的操作由注册表中下列REG_DWORD AttachWhenLoaded值控制:HKLM/System/CurrentControlSet/Services/FltMgr当AttachWhenLoaded被设置为零时，filter管理器不会绑定到任何卷上直到某个minifilter驱动向filter管理
对360沙盒的驱动的一点逆向分析
研究源码的最底层,只持有正确的仓位
01-15 3994
主要内容: 一．360Box沙箱DriverEntry函数安装驱动过滤框架分析二. 360Box沙箱注册表监控分析三. 360沙箱文件系统监控分析一．360Box沙箱DriverEntry函数安装驱动过滤框架分析360Box沙箱的驱动入口代码如下所示，下面单步跟踪分析入口代码安装360对注册表、进程、文件系统等过滤函数的安装过程。从下代码可以看出，360Box安装过滤的顺序为文件系统minifi...
【原创】内核驱动文件重定向 加图加代码
myworldbig的专栏
07-15 3505
作 者: defddr时 间: 2010-11-10,00:02:38链 接: http://bbs.pediy.com/showthread.php?t=124524最近学习了下内核驱动中的文件重定向。现在总结一下，希望对大家有用不知道在逆向论坛发表文件过滤驱动是一个错误？
Windows文件系统过滤管理器之微过滤器驱动开发指南
峥嵘岁月
02-27 9664
Windows文件系统过滤管理器之微过滤器驱动开发指南   0.译者序 对我来说，中文永远是最美，最简洁，最精确和最高雅的文字。 本文翻译仅仅用做交流学习。我不打算保留任何版权或者承担任何责任。不要引用到赢利出版物中给您带来版权官司。本文的翻译者是楚狂人，如果有任何问题，你可以通过邮箱MFC_Tan_Wen@163.com,或者是QQ16191935,或者是MS
Windows驱动_文件系统微小过滤驱动之三微小过滤驱动的操作
Z18_28_19的专栏
10-28 4831
30岁左右的程序员，现在除了奋斗以外，要开始考虑下自己的身体了，到了这个年纪，不能像之前20岁左右的年轻人一样不顾一切去拼搏。现在的自己，应该更讲究效率。所以选择公司也很重要。同样，运动开始变得必需了，要开始自己的运动计划，其实也是为了自己有更好的本钱去奋斗。去努力，还有一个考虑是这个年龄的程序员，已经不是一个人，正常的情况下，有儿子有老婆了，你的身体就变得更加的重要。所以，我们要爱惜自己的身体，
深入解析DLL劫持漏洞
weixin_33910759的博客
03-08 1878
xlab · 2016/03/01 12:31Author:Wins0n0x00 DLL劫持漏洞介绍0.1 漏洞简介如果在进程尝试加载一个DLL时没有指定DLL的绝对路径，那么Windows会尝试去指定的目录下查找这个DLL；如果攻击者能够控制其中的某一个目录，并且放一个恶意的DLL文件到这个目录下，这个恶意的DLL便会被进程所加载，从而造成代码执行。这就是所谓的DLL劫持。在Windows XP...
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