Thanks Tony, I’ve confused the two conceptions. 
I’m not very familiar with it but I think I’ll work it out.
----- Original Message -----
From: “Tony Mason”
To: “File Systems Developers”
Sent: Saturday, August 02, 2003 2:45 PM
Subject: [ntfsd] Re: newbie question: about IoRegisterFsRegistrationCh ange
and sfilter
> You misunderstand this API.
>
> File systems (FAT, NTFS, CDFS, UDFS, MRXRDR, MRXDAV) register as file
> systems by calling IoRegisterFileSystem.
>
> File system filter drivers learn of these file systems by registering for
> notification of these registration (IoRegisterFsRegistrationChange).
>
> This is not the same as notification of mounting file system media - to
> observe the arrival of new media (including removable devices such as a
1394
> disk drive) you must filter one of the appropriate file systems (FAT,
NTFS,
> UDFS) and watch for the IRP_MJ_FILE_SYSTEM_CONTROL, IRP_MN_MOUNT_VOLUME.
> When that is successful, you can attach to the newly created device.
>
> Thus, you are confusing the two mechanisms.
>
> Regards,
>
> Tony
>
> Tony Mason
> Consulting Partner
> OSR Open Systems Resources, Inc.
> http://www.osr.com
>
>
> -----Original Message-----
> From: Yang [mailto:xxxxx@aredian.com.cn]
> Sent: Saturday, August 02, 2003 12:33 AM
> To: File Systems Developers
> Subject: [ntfsd] Re: newbie question: about IoRegisterFsRegistrationChange
> and sfilter
>
> Thanks for the replay, Alexei.
> I mean that the callback routine of my driver didn’t get called at all
when
> I plug in a removeable disk device. When I plugged in the device, my
machine
> added a logical disk named “F:”, does it mean that the IO manager had
> mounted a volume on it? Then my callback routine should has been called at
> that time? However, I’m not very sure.
>
> “Alexei Jelvis” wrote in message
news:xxxxx@ntfsd…
> >
> > IoRegisterFsRegistrationChange allows you to attach to file systems and
> > monitor requests to mount volume, it is not related to a particular
> > hardware.
> > What do you mean that your driver failed to get notification? Does it
mean
> > that it got mount request but all file systems it attached to fail to
> > recognize volume or it doesn’t get called at all? Does USB device has a
> > valid file system?
> >
> > Alexei.
> >
> > “Yang” wrote in message news:xxxxx@ntfsd…
> > >
> > > Thanks Alexei,
> > > I have got a new question:
> > > Does the rule for IoRegisterFsRegistrationChange apply to the USB
> device?
> > > I mean when I plug in or plug out an USB device(A removeable disk),
will
> > my
> > > driver also get notified? I’ve tested this case in my machine, but
also
> > > failed to get the notification. Even it just appears in my computer as
a
> > > form of logical driver.
> > >
> > > Regards
> > > Yang Liu
> > >
> > > “Alexei Jelvis” wrote in message
> > news:xxxxx@ntfsd…
> > > >
> > > > IoRegisterFsRegistrationChange informs you that a file system
driver
> > has
> > > > registed so you can filter mount requests and attach your driver
when
> > > volume
> > > > is mounted. On Windows 2000 this function will notify your driver
> about
> > > file
> > > > systems that were registered after you have called this function. On
> XP
> > > and
> > > > later this function notifies filter about already registred file
> systems
> > > as
> > > > well.
> > > > If your driver is loaded at boot time on Windows 2000 it will get
> > > > notifications about all file systems.
> > > > There is no way to discover file systems that are already registed
on
> > > > Windows 2000. You can attach your filter to file systems you know
> > about -
> > > > FAT, NTFS and CDFS. You need to use IoGetDeviceObjectPointer
specifing
> > > name
> > > > \Fat or \Ntfs to get device object you need to attach to.
> > > >
> > > > Alexei.
> > > >
> > > > “Yang” wrote in message news:xxxxx@ntfsd…
> > > > >
> > > > > Dear all
> > > > > I’ve read the sfilter sample in MS IFS kit and wrote my own
file
> > > > system
> > > > > filter driver according to it. But I’ve got a problem on attaching
> to
> > my
> > > > > logical drivers.
> > > > > I used the function IoRegisterFsRegistrationChange to register
> my
> > > > driver
> > > > > so it will be called whenever a new file systems is loaded. But
> seems
> > it
> > > > > doesn’t work for my win2000 machine. After I’ve loaded my driver
> into
> > > > > memory, nothing happens. Then I restarted it, I got only a tip
that
> a
> > > > device
> > > > > named “\Device\LanmanRedirector” had been hooked and IRPs sent to
> that
> > > > > device began to redirect to my driver. None of my logical
drivers(C:
> > D:
> > > > E:)
> > > > > were hooked.
> > > > >
> > >
> > >
> > >
> > >
> >
> >
> >
> >
>
>
>
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