netdev - Re: [PATCH] filter: introduce SKF_AD_VLAN

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]

Date:	Thu, 5 Mar 2015 09:52:17 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	Michal Sekletar <msekleta@...hat.com>
Cc:	netdev@...r.kernel.org, Alexei Starovoitov <ast@...mgrid.com>,
	Jiri Pirko <jpirko@...hat.com>
Subject: Re: [PATCH] filter: introduce SKF_AD_VLAN_PROTO BPF extension

Wed, Mar 04, 2015 at 09:41:58PM CET, msekleta@...hat.com wrote:
>This commit introduces new BPF extension. It makes possible to load value of
>skb->vlan_proto (vlan tpid) to register A.
>
>Currently, vlan header is removed from frame and information is available to
>userspace only via tpacket interface. Hence, it is not possible to install
>filter which uses value of vlan tpid field.
>
>AFAICT only way how to filter based on tpid value is to reconstruct original
>frame encapsulation and interpret BPF filter code in userspace. Doing that is
>way slower than doing filtering in kernel.
>
>Cc: Alexei Starovoitov <ast@...mgrid.com>
>Cc: Jiri Pirko <jpirko@...hat.com>
>Signed-off-by: Michal Sekletar <msekleta@...hat.com>

Reviewed-by: Jiri Pirko <jiri@...nulli.us>
--
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