The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.
Check out The OSR Learning Library at: https://www.osr.com/osr-learning-library/
my purpose is: monitor files data change in specified path. so, i implement like this:
in IRP_MJ_WRITE pre-op: i created a stream handle context and return FLT_PREOP_SYNCHRONIZE. In post-op: i check io status is STATUS_SUCCESS or not, and set the stream context variable for later use.
but, as MS said: "Minifilter drivers must never return FLT_PREOP_SYNCHRONIZE for asynchronous read or write operations." MS_link
this mean that i must not return FLT_PREOP_SYNCHRONIZE when current operation is Asyn in IRP_MJ_WRITE pre-op cabllack? Or Must not call FltRead|WriteFile (or similars) with async option in IRP_MJ_WRITE pre-op callback?
pls help me figure it out, thank you.
|Upcoming OSR Seminars|
|OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead!|
|Internals & Software Drivers||7 February 2022||Live, Online|
|Kernel Debugging||21 March 2022||Live, Online|
|Developing Minifilters||23 May 2022||Live, Online|
|Writing WDF Drivers||12 September 2022||Live, Online|