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From: Lorenzo Colitti <lorenzo-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
To: Daniel Mack <daniel-cYrQPVfZoowdnm+yROfE0A@public.gmane.org>
Cc: Pablo Neira Ayuso <pablo-Cap9r6Oaw4JrovVCs/uTlw@public.gmane.org>,
	htejun-b10kYP2dOMg@public.gmane.org,
	Daniel Borkmann <daniel-FeC+5ew28dpmcu3hnIyYJQ@public.gmane.org>,
	ast-b10kYP2dOMg@public.gmane.org,
	David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
	kafai-b10kYP2dOMg@public.gmane.org,
	Florian Westphal <fw-HFFVJYpyMKqzQB+pC5nmwQ@public.gmane.org>,
	harald-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	"netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	sargun-GaZTRHToo+CzQB+pC5nmwQ@public.gmane.org,
	cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH v7 0/6] Add eBPF hooks for cgroups
Date: Sat, 29 Oct 2016 12:51:37 +0900	[thread overview]
Message-ID: <CAKD1Yr2aRDNUxX8onReZyURufphxGoSTek=Fjk3Wswq9WOVp4w@mail.gmail.com> (raw)
In-Reply-To: <c9683122-d770-355b-e275-7c446e6d1d0f-cYrQPVfZoowdnm+yROfE0A@public.gmane.org>

On Thu, Oct 27, 2016 at 5:40 PM, Daniel Mack <daniel-cYrQPVfZoowdnm+yROfE0A@public.gmane.org> wrote:
> It's not anything new. These hooks live on the very same level as
> SO_ATTACH_FILTER. The only differences are that the BPF programs are
> stored in the cgroup, and not in the socket, and that they exist for
> egress as well.

What's the use case for egress?

We (android networking) are currently looking at implementing network
accounting via eBPF in order to replace the out-of-tree xt_qtaguid
code. A per-cgroup eBPF program run on all traffic would be great. But
when we looked at this patchset we realized it would not be useful for
accounting purposes because even if a packet is counted here, it might
still be dropped by netfilter hooks.

It seems like it would be much more useful to be able to do this in an
iptables rule.

  parent reply	other threads:[~2016-10-29  3:51 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-25 10:14 [PATCH v7 0/6] Add eBPF hooks for cgroups Daniel Mack
2016-10-25 10:14 ` [PATCH v7 1/6] bpf: add new prog type for cgroup socket filtering Daniel Mack
2016-10-25 10:14 ` [PATCH v7 4/6] net: filter: run cgroup eBPF ingress programs Daniel Mack
     [not found] ` <1477390454-12553-1-git-send-email-daniel-cYrQPVfZoowdnm+yROfE0A@public.gmane.org>
2016-10-25 10:14   ` [PATCH v7 2/6] cgroup: add support for eBPF programs Daniel Mack
2016-10-25 10:14   ` [PATCH v7 3/6] bpf: add BPF_PROG_ATTACH and BPF_PROG_DETACH commands Daniel Mack
2016-10-25 10:14   ` [PATCH v7 5/6] net: ipv4, ipv6: run cgroup eBPF egress programs Daniel Mack
2016-10-31 16:40     ` David Miller
     [not found]       ` <20161031.124003.1361406552151798940.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2016-11-02  1:17         ` Daniel Borkmann
2016-10-25 10:14   ` [PATCH v7 6/6] samples: bpf: add userspace example for attaching eBPF programs to cgroups Daniel Mack
2016-10-26 19:59 ` [PATCH v7 0/6] Add eBPF hooks for cgroups Pablo Neira Ayuso
2016-10-27  3:35   ` Alexei Starovoitov
     [not found]     ` <20161027033502.GA43960-+o4/htvd0TDFYCXBM6kdu7fOX0fSgVTm@public.gmane.org>
2016-10-28 11:28       ` Pablo Neira Ayuso
2016-10-28 15:00         ` David Ahern
2016-10-29  1:42         ` Alexei Starovoitov
2016-10-27  8:40   ` Daniel Mack
     [not found]     ` <c9683122-d770-355b-e275-7c446e6d1d0f-cYrQPVfZoowdnm+yROfE0A@public.gmane.org>
2016-10-28 11:53       ` Pablo Neira Ayuso
2016-10-28 12:07         ` Daniel Mack
2016-10-29  3:51       ` Lorenzo Colitti [this message]
     [not found]         ` <CAKD1Yr2aRDNUxX8onReZyURufphxGoSTek=Fjk3Wswq9WOVp4w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-10-29  4:51           ` Alexei Starovoitov
     [not found]             ` <20161029045107.GA61294-+o4/htvd0TDFYCXBM6kdu7fOX0fSgVTm@public.gmane.org>
2016-10-29  4:59               ` Lorenzo Colitti
     [not found]                 ` <CAKD1Yr2pMk52h7BdRwTvGwnP5+ONmr4ac6cyUBoZ9P+Kt-B8jw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-10-29  6:24                   ` Alexei Starovoitov
2016-10-29 15:34                     ` Lorenzo Colitti
2016-10-29 20:29                       ` Daniel Borkmann
2016-11-01 15:25                         ` Lorenzo Colitti
     [not found]                           ` <CAKD1Yr02SCHvd-xZJL14d_Ta8Dk4evHZ60zytpU0h4r80FucwA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-11-01 15:38                             ` David Miller

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