Re: [PATCH] af_unix: implement socket filter

[Eric Dumazet]

Le mardi 18 janvier 2011 Ã 16:39 +0000, Ian Molton a Ãcrit :
> From: Alban Crequy <alban.crequy@xxxxxxxxxxxxxxx>
> 
> Linux Socket Filters can already be successfully attached and detached on unix
> sockets with setsockopt(sockfd, SOL_SOCKET, SO_{ATTACH,DETACH}_FILTER, ...).
> See: Documentation/networking/filter.txt
> 
> But the filter was never used in the unix socket code so it did not work. This
> patch uses sk_filter() to filter buffers before delivery.
> 
> This short program demonstrates the problem on SOCK_DGRAM.


Any idea on performance cost adding sk_filter() call ?

Hmm, looking at it, I have no idea why sk_filter() needs to block BH.

I'll send a patch to relax this requirement.


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