netdev - Re: [PATCH net-next 2/2] act_bpf: add initial eBPF support for actions

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Message-ID: <550C8F6F.9050403@plumgrid.com>
Date:	Fri, 20 Mar 2015 14:21:51 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	Daniel Borkmann <daniel@...earbox.net>, davem@...emloft.net
CC:	jiri@...nulli.us, netdev@...r.kernel.org,
	Jamal Hadi Salim <jhs@...atatu.com>
Subject: Re: [PATCH net-next 2/2] act_bpf: add initial eBPF support for actions

On 3/20/15 7:11 AM, Daniel Borkmann wrote:
> This work extends the "classic" BPF programmable tc action by extending
> its scope also to native eBPF code!
>
> Together with commit e2e9b6541dd4 ("cls_bpf: add initial eBPF support
> for programmable classifiers") this adds the facility to implement fully
> flexible classifier and actions for tc that can be implemented in a C
> subset in user space, "safely" loaded into the kernel, and being run in
> native speed when JITed.
>
> Also, since eBPF maps can be shared between eBPF programs, it offers the
> possibility that cls_bpf and act_bpf can share data 1) between themselves
> and 2) between user space applications. That means that, f.e. customized
> runtime statistics can be collected in user space, but also more importantly
> classifier and action behaviour could be altered based on map input from
> the user space application.
>
> For the remaining details on the workflow and integration, see the cls_bpf
> commit e2e9b6541dd4. Preliminary iproute2 part can be found under [1].
>
>    [1] http://git.breakpoint.cc/cgit/dborkman/iproute2.git/log/?h=ebpf-act
>
> Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
> Cc: Jamal Hadi Salim <jhs@...atatu.com>
> Cc: Jiri Pirko <jiri@...nulli.us>

Acked-by: Alexei Starovoitov <ast@...mgrid.com>

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