From: Quentin Monnet <quentin.monnet@netronome.com>
To: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: daniel@iogearbox.net, ast@kernel.org, netdev@vger.kernel.org,
oss-drivers@netronome.com, linux-doc@vger.kernel.org,
linux-man@vger.kernel.org,
John Fastabend <john.fastabend@gmail.com>
Subject: Re: [PATCH bpf-next v3 8/8] bpf: add documentation for eBPF helpers (58-64)
Date: Wed, 18 Apr 2018 15:09:41 +0100 [thread overview]
Message-ID: <67e84a95-5e7b-1c2c-e90f-7bcc0026bd10@netronome.com> (raw)
In-Reply-To: <20180418153448.574c6814@redhat.com>
2018-04-18 15:34 UTC+0200 ~ Jesper Dangaard Brouer <brouer@redhat.com>
> On Tue, 17 Apr 2018 15:34:38 +0100
> Quentin Monnet <quentin.monnet@netronome.com> wrote:
>
>> diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
>> index 350459c583de..3d329538498f 100644
>> --- a/include/uapi/linux/bpf.h
>> +++ b/include/uapi/linux/bpf.h
>> @@ -1276,6 +1276,50 @@ union bpf_attr {
>> * Return
>> * 0 on success, or a negative error in case of failure.
>> *
>> + * int bpf_redirect_map(struct bpf_map *map, u32 key, u64 flags)
>> + * Description
>> + * Redirect the packet to the endpoint referenced by *map* at
>> + * index *key*. Depending on its type, his *map* can contain
> ^^^
>
> "his" -> "this"
Thanks!
>> + * references to net devices (for forwarding packets through other
>> + * ports), or to CPUs (for redirecting XDP frames to another CPU;
>> + * but this is only implemented for native XDP (with driver
>> + * support) as of this writing).
>> + *
>> + * All values for *flags* are reserved for future usage, and must
>> + * be left at zero.
>> + * Return
>> + * **XDP_REDIRECT** on success, or **XDP_ABORT** on error.
>> + *
>
> "XDP_ABORT" -> "XDP_ABORTED"
Ouch. And I did the same for bpf_redirect(). Thanks for the catch.
>
> I don't know if it's worth mentioning in the doc/man-page; that for XDP
> using bpf_redirect_map() is a HUGE performance advantage, compared to
> the bpf_redirect() call ?
It seems worth to me. How would you simply explain the reason for this
difference?
Quentin
next prev parent reply other threads:[~2018-04-18 14:09 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-17 14:34 [PATCH bpf-next v3 0/8] bpf: document eBPF helpers and add a script to generate man page Quentin Monnet
2018-04-17 14:34 ` [PATCH bpf-next v3 1/8] bpf: add script and prepare bpf.h for new helpers documentation Quentin Monnet
2018-04-17 14:34 ` [PATCH bpf-next v3 2/8] bpf: add documentation for eBPF helpers (01-11) Quentin Monnet
2018-04-18 1:04 ` Alexei Starovoitov
2018-04-19 10:02 ` Daniel Borkmann
2018-04-17 14:34 ` [PATCH bpf-next v3 3/8] bpf: add documentation for eBPF helpers (12-22) Quentin Monnet
2018-04-18 22:10 ` Alexei Starovoitov
2018-04-19 10:29 ` Daniel Borkmann
2018-04-17 14:34 ` [PATCH bpf-next v3 4/8] bpf: add documentation for eBPF helpers (23-32) Quentin Monnet
2018-04-18 22:11 ` Alexei Starovoitov
2018-04-19 11:16 ` Daniel Borkmann
2018-04-20 18:54 ` Quentin Monnet
2018-04-23 9:11 ` Daniel Borkmann
2018-04-17 14:34 ` [PATCH bpf-next v3 5/8] bpf: add documentation for eBPF helpers (33-41) Quentin Monnet
2018-04-18 22:23 ` Alexei Starovoitov
2018-04-19 12:27 ` Daniel Borkmann
2018-04-17 14:34 ` [PATCH bpf-next v3 6/8] bpf: add documentation for eBPF helpers (42-50) Quentin Monnet
2018-04-18 23:29 ` Alexei Starovoitov
2018-04-18 23:42 ` Martin KaFai Lau
2018-04-19 12:40 ` Daniel Borkmann
2018-04-17 14:34 ` [PATCH bpf-next v3 7/8] bpf: add documentation for eBPF helpers (51-57) Quentin Monnet
2018-04-17 17:51 ` Yonghong Song
2018-04-17 17:55 ` Andrey Ignatov
2018-04-19 12:47 ` Daniel Borkmann
2018-04-17 14:34 ` [PATCH bpf-next v3 8/8] bpf: add documentation for eBPF helpers (58-64) Quentin Monnet
2018-04-18 13:34 ` Jesper Dangaard Brouer
2018-04-18 14:09 ` Quentin Monnet [this message]
2018-04-18 15:43 ` Jesper Dangaard Brouer
2018-04-19 12:44 ` Quentin Monnet
2018-04-19 12:58 ` Jesper Dangaard Brouer
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