From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id D010F7DE78 for ; Wed, 18 Apr 2018 13:35:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752659AbeDRNez (ORCPT ); Wed, 18 Apr 2018 09:34:55 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:50968 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752624AbeDRNey (ORCPT ); Wed, 18 Apr 2018 09:34:54 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A436840201A1; Wed, 18 Apr 2018 13:34:53 +0000 (UTC) Received: from localhost (ovpn-200-16.brq.redhat.com [10.40.200.16]) by smtp.corp.redhat.com (Postfix) with ESMTP id B75F52023594; Wed, 18 Apr 2018 13:34:50 +0000 (UTC) Date: Wed, 18 Apr 2018 15:34:48 +0200 From: Jesper Dangaard Brouer To: Quentin Monnet Cc: brouer@redhat.com, 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 Subject: Re: [PATCH bpf-next v3 8/8] bpf: add documentation for eBPF helpers (58-64) Message-ID: <20180418153448.574c6814@redhat.com> In-Reply-To: <20180417143438.7018-9-quentin.monnet@netronome.com> References: <20180417143438.7018-1-quentin.monnet@netronome.com> <20180417143438.7018-9-quentin.monnet@netronome.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Wed, 18 Apr 2018 13:34:53 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Wed, 18 Apr 2018 13:34:53 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'brouer@redhat.com' RCPT:'' Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On Tue, 17 Apr 2018 15:34:38 +0100 Quentin Monnet 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" > + * 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" 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 ? -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html