From owner-svn-src-head@freebsd.org Thu Jul 16 13:37:33 2020 Return-Path: Delivered-To: svn-src-head@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 2ED0E362367; Thu, 16 Jul 2020 13:37:33 +0000 (UTC) (envelope-from kevans@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4B6wKn0Vs3z4X21; Thu, 16 Jul 2020 13:37:33 +0000 (UTC) (envelope-from kevans@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id EA22E9483; Thu, 16 Jul 2020 13:37:32 +0000 (UTC) (envelope-from kevans@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 06GDbWmM026384; Thu, 16 Jul 2020 13:37:32 GMT (envelope-from kevans@FreeBSD.org) Received: (from kevans@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 06GDbW9x026383; Thu, 16 Jul 2020 13:37:32 GMT (envelope-from kevans@FreeBSD.org) Message-Id: <202007161337.06GDbW9x026383@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kevans set sender to kevans@FreeBSD.org using -f From: Kyle Evans Date: Thu, 16 Jul 2020 13:37:32 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r363244 - head/sys/net X-SVN-Group: head X-SVN-Commit-Author: kevans X-SVN-Commit-Paths: head/sys/net X-SVN-Commit-Revision: 363244 X-SVN-Commit-Repository: base 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: 2.1.33 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: Thu, 16 Jul 2020 13:37:33 -0000 Author: kevans Date: Thu Jul 16 13:37:32 2020 New Revision: 363244 URL: https://svnweb.freebsd.org/changeset/base/363244 Log: ether_ifattach: set mtu before calling if_attach() if_attach() -> if_attach_internal() will call if_attachdomain1(ifp) any time an ethernet interface is setup *after* SI_SUB_PROTO_IFATTACHDOMAIN/SI_ORDER_FIRST. This eventually leads to nd6_ifattach() -> nd6_setmtu0() stashing off ifp->if_mtu in ndi->maxmtu *before* ifp->if_mtu has been properly set in some scenarios, e.g., USB ethernet adapter plugged in later on. For interfaces that are created in early boot, we don't have this issue as domains aren't constructed enough for them to attach and thus it gets deferred to domainifattach at SI_SUB_PROTO_IFATTACHDOMAIN/SI_ORDER_SECOND *after* the mtu has been set earlier in ether_ifattach(). PR: 248005 Submitted by: Mathew MFC after: 1 week Modified: head/sys/net/if_ethersubr.c Modified: head/sys/net/if_ethersubr.c ============================================================================== --- head/sys/net/if_ethersubr.c Thu Jul 16 13:37:11 2020 (r363243) +++ head/sys/net/if_ethersubr.c Thu Jul 16 13:37:32 2020 (r363244) @@ -969,8 +969,8 @@ ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) ifp->if_addrlen = ETHER_ADDR_LEN; ifp->if_hdrlen = ETHER_HDR_LEN; - if_attach(ifp); ifp->if_mtu = ETHERMTU; + if_attach(ifp); ifp->if_output = ether_output; ifp->if_input = ether_input; ifp->if_resolvemulti = ether_resolvemulti;