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From: Tom Herbert <tom@herbertland.com>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: Brenden Blanco <bblanco@plumgrid.com>,
	"David S. Miller" <davem@davemloft.net>,
	Linux Kernel Network Developers <netdev@vger.kernel.org>,
	Alexei Starovoitov <alexei.starovoitov@gmail.com>,
	gerlitz@mellanox.com, Daniel Borkmann <daniel@iogearbox.net>,
	john fastabend <john.fastabend@gmail.com>,
	Jesper Dangaard Brouer <brouer@redhat.com>,
	Lorenzo Colitti <lorenzo@google.com>
Subject: Re: [RFC PATCH 0/5] Add driver bpf hook for early packet drop
Date: Sat, 2 Apr 2016 18:57:09 -0400	[thread overview]
Message-ID: <CALx6S35kK9eNk8r-fZmP-mOSB=Tb8udbaQeSUjmHWJagh+=i=A@mail.gmail.com> (raw)
In-Reply-To: <1459622491.18188.6.camel@sipsolutions.net>

On Sat, Apr 2, 2016 at 2:41 PM, Johannes Berg <johannes@sipsolutions.net> wrote:
> On Fri, 2016-04-01 at 18:21 -0700, Brenden Blanco wrote:
>> This patch set introduces new infrastructure for programmatically
>> processing packets in the earliest stages of rx, as part of an effort
>> others are calling Express Data Path (XDP) [1]. Start this effort by
>> introducing a new bpf program type for early packet filtering, before
>> even
>> an skb has been allocated.
>>
>> With this, hope to enable line rate filtering, with this initial
>> implementation providing drop/allow action only.
>
> Since this is handed to the driver in some way, I assume the API would
> also allow offloading the program to the NIC itself, and as such be
> useful for what Android wants to do to save power in wireless?
>
Conceptually, yes. There is some ongoing work to offload BPF and one
goal is that BPF programs (like for XDP) could be portable between
userspace, kernel (maybe even other OSes), and devices.

I am curious though, how do you think this would specifically help
Android with power? Seems like the receiver still needs to be powered
to receive packets to filter them anyway...

Thanks,
Tom

> johannes

  reply	other threads:[~2016-04-02 22:57 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-02  1:21 [RFC PATCH 0/5] Add driver bpf hook for early packet drop Brenden Blanco
2016-04-02  1:21 ` [RFC PATCH 1/5] bpf: add PHYS_DEV prog type for early driver filter Brenden Blanco
2016-04-02 16:39   ` Tom Herbert
2016-04-03  7:02     ` Brenden Blanco
2016-04-04 22:07       ` Thomas Graf
2016-04-05  8:19         ` Jesper Dangaard Brouer
2016-04-04  8:49   ` Daniel Borkmann
2016-04-04 13:07     ` Jesper Dangaard Brouer
2016-04-04 13:36       ` Daniel Borkmann
2016-04-04 14:09         ` Tom Herbert
2016-04-04 15:12           ` Jesper Dangaard Brouer
2016-04-04 15:29             ` Brenden Blanco
2016-04-04 16:07               ` John Fastabend
2016-04-04 16:17                 ` Brenden Blanco
2016-04-04 20:00                   ` Alexei Starovoitov
2016-04-04 22:04                     ` Thomas Graf
2016-04-05  2:25                       ` Alexei Starovoitov
2016-04-05  8:11                         ` Jesper Dangaard Brouer
2016-04-05  9:29                     ` Jesper Dangaard Brouer
2016-04-05 22:06                       ` Alexei Starovoitov
2016-04-04 14:33       ` Eric Dumazet
2016-04-04 15:18         ` Edward Cree
2016-04-02  1:21 ` [RFC PATCH 2/5] net: add ndo to set bpf prog in adapter rx Brenden Blanco
2016-04-02  1:21 ` [RFC PATCH 3/5] rtnl: add option for setting link bpf prog Brenden Blanco
2016-04-02  1:21 ` [RFC PATCH 4/5] mlx4: add support for fast rx drop bpf program Brenden Blanco
2016-04-02  2:08   ` Eric Dumazet
2016-04-02  2:47     ` Alexei Starovoitov
2016-04-04 14:57       ` Jesper Dangaard Brouer
2016-04-04 15:22         ` Eric Dumazet
2016-04-04 18:50           ` Alexei Starovoitov
2016-04-05 14:15             ` Or Gerlitz
2016-04-06  4:05               ` Brenden Blanco
2016-04-03  6:15     ` Brenden Blanco
2016-04-05  2:20       ` Brenden Blanco
2016-04-05  2:44         ` Eric Dumazet
2016-04-05 18:59         ` Eran Ben Elisha
2016-04-02  8:23   ` Jesper Dangaard Brouer
2016-04-03  6:11     ` Brenden Blanco
2016-04-04 18:27       ` Alexei Starovoitov
2016-04-05  6:04         ` Jesper Dangaard Brouer
2016-04-02 18:40   ` Johannes Berg
2016-04-03  6:38     ` Brenden Blanco
2016-04-04  7:35       ` Johannes Berg
2016-04-04  9:57         ` Daniel Borkmann
2016-04-04 18:46           ` Alexei Starovoitov
2016-04-04 21:01             ` Daniel Borkmann
2016-04-05  1:17               ` Alexei Starovoitov
2016-04-04  8:33   ` Jesper Dangaard Brouer
2016-04-04  9:22   ` Daniel Borkmann
2016-04-02  1:21 ` [RFC PATCH 5/5] Add sample for adding simple drop program to link Brenden Blanco
2016-04-06 19:48   ` Jesper Dangaard Brouer
2016-04-06 20:01     ` Jesper Dangaard Brouer
2016-04-06 23:11       ` Alexei Starovoitov
2016-04-06 20:03     ` Daniel Borkmann
2016-04-02 16:47 ` [RFC PATCH 0/5] Add driver bpf hook for early packet drop Tom Herbert
2016-04-03  5:41   ` Brenden Blanco
2016-04-04  7:48     ` Jesper Dangaard Brouer
2016-04-04 18:10       ` Alexei Starovoitov
2016-04-02 18:41 ` Johannes Berg
2016-04-02 22:57   ` Tom Herbert [this message]
2016-04-03  2:28     ` Lorenzo Colitti
2016-04-04  7:37       ` Johannes Berg

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