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filter manager resets Iopb for rename operations before post-callback

Sergey_PisarevSergey_Pisarev Member - All Emails Posts: 148

Hello !
I am filtering rename operations. In pre-callback I clear ReplaceIfExists in both FLT_PARAMETERS for IRP_MJ_SET_INFORMATION and FILE_RENAME_INFORMATION. Call FltSetCallbackDataDirty.
Before my callback called filter manager sets Iopb in FLT_CALLBACK_DATA to new value.
In post-callback I have ReplaceIfExists in FLT_PARAMETERS for IRP_MJ_SET_INFORMATION set(by fltmgr) to TRUE(should be FALSE). ReplaceIfExists in FILE_RENAME_INFORMATION still set to FALSE(as expected).
Nothing changes if I don't call FltSetCallbackDataDirty.

Is that expected behaviour ? What should I do if I want to get correct modified value in post-callback ?


  • Dejan_MaksimovicDejan_Maksimovic Member - All Emails Posts: 239
    via Email
    You don't. This is expected behavior - you get the original data in
    the Iopb in your Post Operation callback. You need to save it
  • rod_widdowsonrod_widdowson Member - All Emails Posts: 1,045

    ... And it could be argued that is is beholden on you to put the FILE_RENAME_INFORMATION back the way you found it.

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