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From: Jiri Pirko <jiri@resnulli.us>
To: Michal Sekletar <msekleta@redhat.com>
Cc: netdev@vger.kernel.org, Alexei Starovoitov <ast@plumgrid.com>,
	Jiri Pirko <jpirko@redhat.com>
Subject: Re: [PATCH] filter: introduce SKF_AD_VLAN_PROTO BPF extension
Date: Thu, 5 Mar 2015 09:52:17 +0100	[thread overview]
Message-ID: <20150305085217.GD2033@nanopsycho.orion> (raw)
In-Reply-To: <1425501718-12066-1-git-send-email-msekleta@redhat.com>

Wed, Mar 04, 2015 at 09:41:58PM CET, msekleta@redhat.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@plumgrid.com>
>Cc: Jiri Pirko <jpirko@redhat.com>
>Signed-off-by: Michal Sekletar <msekleta@redhat.com>

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

  parent reply	other threads:[~2015-03-05  8:52 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-04 20:41 [PATCH] filter: introduce SKF_AD_VLAN_PROTO BPF extension Michal Sekletar
2015-03-04 21:03 ` Alexei Starovoitov
2015-03-04 21:14   ` Guy Harris
2015-03-04 23:47     ` Alexei Starovoitov
2015-03-05  6:50       ` Jiri Pirko
2015-03-05  7:23         ` Alexei Starovoitov
2015-03-05  7:24         ` Michal Kubecek
2015-03-05  7:49           ` Alexei Starovoitov
2015-03-05  8:35           ` Guy Harris
2015-03-05  9:23             ` Michal Kubecek
2015-03-05  2:28   ` Toshiaki Makita
2015-03-05  2:41     ` Alexei Starovoitov
2015-03-05 10:37   ` Michal Sekletar
2015-03-05 16:52     ` Alexei Starovoitov
2015-03-05 20:03       ` Daniel Borkmann
2015-03-05 20:40         ` Alexei Starovoitov
2015-03-06  8:09           ` Michal Sekletar
2015-03-06  9:04         ` Michal Sekletar
2015-03-06 17:23           ` Daniel Borkmann
2015-03-06 14:02         ` Michal Kubecek
2015-03-06 17:54           ` Daniel Borkmann
2015-03-05  8:52 ` Jiri Pirko [this message]
2015-03-05  8:57 ` Denis Kirjanov
2015-03-05 14:33   ` Michal Sekletar
2015-03-05 18:12   ` David Miller

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