netdev - Re: [Q/RFC] BPF use in broader scope

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20120329.034957.655153582806618222.davem@davemloft.net>
Date:	Thu, 29 Mar 2012 03:49:57 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	jpirko@...hat.com
Cc:	netdev@...r.kernel.org, eric.dumazet@...il.com,
	bhutchings@...arflare.com, shemminger@...tta.com
Subject: Re: [Q/RFC] BPF use in broader scope

From: Jiri Pirko <jpirko@...hat.com>
Date: Thu, 29 Mar 2012 09:44:43 +0200

> Here are proposed things to be done:
> 1) introduce in-kernel api for creating sk-unattached filters (I have
>    the patch cooked up already)
> 
> 2) extend current BPF machine to allow XOR operation. Not sure if this
>    is doable or what the best of doing this is.
> 
> 3) add possibility to pass some data to the machine via
>    pre-filling "Scratch Memory Store". I think this can be done easily
>    moving "u32 mem[BPF_MEMWORDS];" to bpf_func caller and pass it as the
>    second function parameter. That should not break anything.
> 
> Then the computed hash can be either stored into Scratch memory or returned
> directly (where ordinary sk filters return len).
> 
> Does this seems reasonable? Thoughts, comments?

No fundamental objections, but we have all of these JITs now to
update when adding new operations or semantics, so be careful.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html