From owner-svn-src-head@FreeBSD.ORG Mon Oct 28 22:54:29 2013 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 9C9FE738; Mon, 28 Oct 2013 22:54:29 +0000 (UTC) (envelope-from brueffer@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 70BCF260D; Mon, 28 Oct 2013 22:54:29 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id r9SMsTiS073747; Mon, 28 Oct 2013 22:54:29 GMT (envelope-from brueffer@svn.freebsd.org) Received: (from brueffer@localhost) by svn.freebsd.org (8.14.7/8.14.5/Submit) id r9SMsTwY073746; Mon, 28 Oct 2013 22:54:29 GMT (envelope-from brueffer@svn.freebsd.org) Message-Id: <201310282254.r9SMsTwY073746@svn.freebsd.org> From: Christian Brueffer Date: Mon, 28 Oct 2013 22:54:29 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r257287 - head/share/man/man4 X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 Oct 2013 22:54:29 -0000 Author: brueffer Date: Mon Oct 28 22:54:28 2013 New Revision: 257287 URL: http://svnweb.freebsd.org/changeset/base/257287 Log: New sentence -> new line and some mdoc cleanup. MFC after: 3 days Modified: head/share/man/man4/bpf.4 Modified: head/share/man/man4/bpf.4 ============================================================================== --- head/share/man/man4/bpf.4 Mon Oct 28 22:49:11 2013 (r257286) +++ head/share/man/man4/bpf.4 Mon Oct 28 22:54:28 2013 (r257287) @@ -697,9 +697,11 @@ is used when the time stamp is set to .Dv BPF_T_MICROTIME_MONOTONIC_FAST , or .Dv BPF_T_NONE -for backward compatibility reasons. Otherwise, +for backward compatibility reasons. +Otherwise, .Vt bpf_xhdr -is used. However, +is used. +However, .Vt bpf_hdr may be deprecated in the near future. Suitable precautions @@ -962,19 +964,23 @@ subsystem .It Va net.bpf.optimize_writers: No 0 Various programs use BPF to send (but not receive) raw packets (cdpd, lldpd, dhcpd, dhcp relays, etc. are good examples of such programs). -They do not need incoming packets to be send to them. Turning this option on +They do not need incoming packets to be send to them. +Turning this option on makes new BPF users to be attached to write-only interface list until program explicitly specifies read filter via -.Cm pcap_set_filter() . +.Fn pcap_set_filter . This removes any performance degradation for high-speed interfaces. .It Va net.bpf.stats: Binary interface for retrieving general statistics. .It Va net.bpf.zerocopy_enable: No 0 -Permits zero-copy to be used with net BPF readers. Use with caution. +Permits zero-copy to be used with net BPF readers. +Use with caution. .It Va net.bpf.maxinsns: No 512 -Maximum number of instructions that BPF program can contain. Use +Maximum number of instructions that BPF program can contain. +Use .Xr tcpdump 1 --d option to determine approximate number of instruction for any filter. +.Fl d +option to determine approximate number of instruction for any filter. .It Va net.bpf.maxbufsize: No 524288 Maximum buffer size to allocate for packets buffer. .It Va net.bpf.bufsize: No 4096