[Help] How to Replace File Operations in File System?

[freeman]

Hi Rishi,

With pleasure!
You can check it on https://github.com/freemandealer/droidcry
on your convenience.

 2014-02-19 23:17, Rishi Agrawal :
> Good that you solved it your self, still if you can send me the idea
> on which you are working - I may also learn something.
>
>
> On Tue, Feb 18, 2014 at 10:04 AM, freeman <freeman.zhang1992 at gmail.com
> <mailto:freeman.zhang1992 at gmail.com>> wrote:
>
>
>     > Hi
>     >
>     > The operations will not change back until your object gets
>     destroyed,
>     > whatever be the type of the object.
>     >
>     > Caching will not cause any issue here.
>     >
>     > Maybe if you can send the code we can have a look at it.
>     >
>     >
>     > --
>     > Regards,
>     > Rishi Agrawal
>     Hi Rishi,
>
>     It's very nice of you willing to help check my code!
>     I'm now very excited － problem solved!
>
>     I spent half a day beautifying my code yesterday (so that it won't
>     annoy
>     you
>     that much), and find there is a problem:
>
>     Every time there is a read/write system call, I saved the lower
>     file ops
>     and
>     address space ops. In their replacement(upper operations), I invoked
>     lower ones.
>     There's a possibility that it might saved the upper operations as
>     lower
>     ones if I
>     open them twice in a short time. At this point, upper operation invoke
>     itself!
>     So I check the operations before truly save and replace them and,
>     it works!
>
>     Thanks to you and all the amazing people in this amazing list that
>     helped me,
>     now I get both wrapfs and my own non-filesystem module functional
>     for my
>     future work on transparent encryption, and most importantly, I've
>     learned and
>     enjoyed a lot!
>
>     Regards
>     Freeman Zhang
>
>
>
>
> -- 
> Regards,
> Rishi Agrawal
Regards
Freeman Zhang

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