Re: device driver close

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On Sun, 2006-11-12 at 19:12 -0800, Sudharsan Rangarajan wrote:
> Hello,
> My device driver stores process specific info in its private
> field(yes..weird!). On a fork the private field gets a new member (for
> the child process). When a process exits, i wouldve to clean this up.
> However given that the device drivers close is called only on teh last
> close, I cant seem to figure out anyway. Any pointerS?

Hi,

you have a design problem here; I can send the fd I get from your device
to another process (via the unix socket fd passing) and then exit
myself. That has 2 issues for you
1) the other process has bad private data even if I don't exit
2) you won't get close notification on my process exit since there still
is a process that his the same file open

sounds like a case of "eh need to rethink this"..
maybe if you had posted your sourcecode (need that under the gpl terms
anyway) I could have given suggestions.


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