From owner-freebsd-net@freebsd.org Sat Feb 24 13:04:32 2018 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5F61EF0F5A9 for ; Sat, 24 Feb 2018 13:04:32 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [78.47.246.247]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id DBA4881177 for ; Sat, 24 Feb 2018 13:04:31 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (root@eg.sd.rdtc.ru [62.231.161.221] (may be forged)) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id w1OD4Mjw026105 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 24 Feb 2018 14:04:23 +0100 (CET) (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: longwitz@incore.de Received: from [10.58.0.4] ([10.58.0.4]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id w1OD4EhL005675 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Sat, 24 Feb 2018 20:04:14 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: loopback routes pinned by commit r326012 for FreeBSD 10 cannot be deleted To: Andreas Longwitz References: <5A9075CB.10408@incore.de> <5A90E679.3030106@grosbein.net> <5A915C9D.7020000@incore.de> Cc: freebsd-net@freebsd.org From: Eugene Grosbein Message-ID: <5A9162C9.5050206@grosbein.net> Date: Sat, 24 Feb 2018 20:04:09 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.7.2 MIME-Version: 1.0 In-Reply-To: <5A915C9D.7020000@incore.de> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=2.2 required=5.0 tests=BAYES_00, LOCAL_FROM, RDNS_NONE autolearn=no autolearn_force=no version=3.4.1 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 1.9 RDNS_NONE Delivered to internal network by a host with no rDNS * 2.6 LOCAL_FROM From my domains X-Spam-Level: ** X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on hz.grosbein.net X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 24 Feb 2018 13:04:32 -0000 24.02.2018 19:37, Andreas Longwitz wrote: >> Please test the follwoind patch for the kernel: >> >> --- sys/net/if.c.orig 2018-02-24 08:00:34.578670000 +0700 >> +++ sys/net/if.c 2018-02-24 11:07:57.014318000 +0700 >> @@ -1699,7 +1699,7 @@ ifa_del_loopback_route(struct ifaddr *if >> null_sdl.sdl_type = ifa->ifa_ifp->if_type; >> null_sdl.sdl_index = ifa->ifa_ifp->if_index; >> bzero(&info, sizeof(info)); >> - info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; >> + info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED; >> info.rti_info[RTAX_DST] = ia; >> info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; >> error = rtrequest1_fib(RTM_DELETE, &info, NULL, ifa->ifa_ifp->if_fib); >> > > This patch patch solves the problem for "ifconfig fxp0 delete": now the > kernel removes the loopback route, tested on FreeBSD 10 r328260. Glad to know that. > But deleting the loopback route manually does not work anymore, is this > intended behaviour ? > > I would like to control the routing table as much as possible. This is side effect of loopback routes being intentionally protected with RTF_PINNED flag in recent FreeBSD versions so that link routes can override ones installed by routing daemons. Perhaps, ifconfig(8) utility should be extended to use RTF_PINNED to be able to modify such routes.