netdev - Re: [PATCH v10 02/12] bpf: add XDP prog type for early driver filter

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: <20160719213314.GA64618@ast-mbp.thefacebook.com>
Date:	Tue, 19 Jul 2016 14:33:15 -0700
From:	Alexei Starovoitov <alexei.starovoitov@...il.com>
To:	Brenden Blanco <bblanco@...mgrid.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org,
	Jamal Hadi Salim <jhs@...atatu.com>,
	Saeed Mahameed <saeedm@....mellanox.co.il>,
	Martin KaFai Lau <kafai@...com>,
	Jesper Dangaard Brouer <brouer@...hat.com>,
	Ari Saha <as754m@....com>, Or Gerlitz <gerlitz.or@...il.com>,
	john.fastabend@...il.com, hannes@...essinduktion.org,
	Thomas Graf <tgraf@...g.ch>, Tom Herbert <tom@...bertland.com>,
	Daniel Borkmann <daniel@...earbox.net>,
	Tariq Toukan <ttoukan.linux@...il.com>
Subject: Re: [PATCH v10 02/12] bpf: add XDP prog type for early driver filter

On Tue, Jul 19, 2016 at 12:16:47PM -0700, Brenden Blanco wrote:
> Add a new bpf prog type that is intended to run in early stages of the
> packet rx path. Only minimal packet metadata will be available, hence a
> new context type, struct xdp_md, is exposed to userspace. So far only
> expose the packet start and end pointers, and only in read mode.
> 
> An XDP program must return one of the well known enum values, all other
> return codes are reserved for future use. Unfortunately, this
> restriction is hard to enforce at verification time, so take the
> approach of warning at runtime when such programs are encountered. Out
> of bounds return codes should alias to XDP_ABORTED.
> 
> Signed-off-by: Brenden Blanco <bblanco@...mgrid.com>

Acked-by: Alexei Starovoitov <ast@...nel.org>