I have a driver which is based on sfilter. Since it’s a system-start
driver, it needs to enumerate all existing volumes via
IoRegisterFsRegistrationChange.
The problem is, sometimes on XP the calls of IoGetDiskDeviceObject on
some volumes could fail with 0xC000000DL. However I still can
successfully get the infomation of these volume with !driveinfo:
Example:
0: kd> !driveinfo c:
Drive c:, DriveObject e152ae88
Directory Object: e1008ac0 Name: C:
Target String is ‘\Device\HarddiskVolume2’
Drive Letter Index is 3 (C:)
Volume DevObj: 86542900
Vpb: 8655b9b8 DeviceObject: 865c9020
FileSystem: \FileSystem\Ntfs
I also tested sfilter for some time. It seems that it works fine. So I
guess there is something wrong with our driver but no idea…
Any hints? Thanks in advance.
Cheers,
R. Yang
Windows Kernel Developer [Custom Dev and Consulting]
Update on the problem: sfilter also has the same problem. It seems
that this only happens after I install ZoneAlarm (7.0.337.000).
On Fri, 20 Apr 2007 17:10:43 +1000, R. Yang wrote:
>Hi guys, > >I have a driver which is based on sfilter. Since it’s a system-start >driver, it needs to enumerate all existing volumes via >IoRegisterFsRegistrationChange. > >The problem is, sometimes on XP the calls of IoGetDiskDeviceObject on >some volumes could fail with 0xC000000DL. However I still can >successfully get the infomation of these volume with !driveinfo: > >Example: >0: kd> !driveinfo c: >Drive c:, DriveObject e152ae88 > Directory Object: e1008ac0 Name: C: > Target String is ‘\Device\HarddiskVolume2’ > Drive Letter Index is 3 (C:) > Volume DevObj: 86542900 > Vpb: 8655b9b8 DeviceObject: 865c9020 > FileSystem: \FileSystem\Ntfs > >I also tested sfilter for some time. It seems that it works fine. So I >guess there is something wrong with our driver but no idea… > >Any hints? Thanks in advance. > >Cheers, >R. Yang >- Windows Kernel Developer [Custom Dev and Consulting]
Cheers, R. Yang - Windows Kernel Developer [Custom Dev and Consulting]