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FSCTL_GET_RETRIEVAL_POINTER_BASE returns invalid parameter as response in file system filter driver

Shashi140Shashi140 Member Posts: 9


I want to retrieve the sector offset information to calculate LBA of a file from my file system filter driver. I am able to get response for FSCTL_GET_RETRIEVAL_POINTERS IOCTL, but for FSCTL_GET_RETRIEVAL_POINTER_BASE it is returning as INVALID parameter. Any thing am missing here. The file also has been opened with GENERIC_ALL_ACCESS.

Status = FltFsControlFile(pVolumeCtx->Instance, pFileObject, FSCTL_GET_RETRIEVAL_POINTER_BASE, NULL, 0, &SectOffset, 8, NULL);

        if (Status == STATUS_SUCCESS)
            Trace(TRACE_LEVEL_INFORMATION, TRACE_FLAG_FILTERMISC, "SectorOffset %lld", SectOffset.FileAreaOffset.QuadPart);



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