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File system filter

OSR_Community_UserOSR_Community_User Member Posts: 110,217
Hello developers,
I have questions about file system filter driver.
If I'm using file system filter driver, can I obtain the VCB of volume or FCB of file.
Can I purge a volume cache if there are some opened files on this volume?

Best:
Aleko

Comments

  • OSR_Community_UserOSR_Community_User Member Posts: 110,217
    >If I'm using file system filter driver, can I obtain the VCB of volume or
    FCB of
    >file.

    The part of FCB with the layout of FSRTL_COMMON_FCB_HEADER is
    pointed to by FileObject->FsContext.
    But it is not known where the real FCB begins -
    FSRTL_COMMON_FCB_HEADER can be at any offset inside the FCB.
    As about the VCB - it is the private FSD's data structure pointed to by the
    FCB. IO manager imposes no limitations on it.

    Max
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