From owner-svn-src-all@freebsd.org Mon Jul 6 21:52:27 2015 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 916259954EC; Mon, 6 Jul 2015 21:52:27 +0000 (UTC) (envelope-from jmg@gold.funkthat.com) Received: from gold.funkthat.com (gate2.funkthat.com [208.87.223.18]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "gold.funkthat.com", Issuer "gold.funkthat.com" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 731C1100E; Mon, 6 Jul 2015 21:52:27 +0000 (UTC) (envelope-from jmg@gold.funkthat.com) Received: from gold.funkthat.com (localhost [127.0.0.1]) by gold.funkthat.com (8.14.5/8.14.5) with ESMTP id t66LqKJQ096516 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 6 Jul 2015 14:52:20 -0700 (PDT) (envelope-from jmg@gold.funkthat.com) Received: (from jmg@localhost) by gold.funkthat.com (8.14.5/8.14.5/Submit) id t66LqKAw096515; Mon, 6 Jul 2015 14:52:20 -0700 (PDT) (envelope-from jmg) Date: Mon, 6 Jul 2015 14:52:20 -0700 From: John-Mark Gurney To: Ian Lepore Cc: Neel Natu , src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r285217 - head/usr.sbin/bhyve Message-ID: <20150706215220.GP8523@funkthat.com> References: <201507061933.t66JXTtJ050058@repo.freebsd.org> <1436213492.1334.64.camel@freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1436213492.1334.64.camel@freebsd.org> X-Operating-System: FreeBSD 9.1-PRERELEASE amd64 X-PGP-Fingerprint: 54BA 873B 6515 3F10 9E88 9322 9CB1 8F74 6D3F A396 X-Files: The truth is out there X-URL: http://resnet.uoregon.edu/~gurney_j/ X-Resume: http://resnet.uoregon.edu/~gurney_j/resume.html X-TipJar: bitcoin:13Qmb6AeTgQecazTWph4XasEsP7nGRbAPE X-to-the-FBI-CIA-and-NSA: HI! HOW YA DOIN? can i haz chizburger? User-Agent: Mutt/1.5.21 (2010-09-15) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (gold.funkthat.com [127.0.0.1]); Mon, 06 Jul 2015 14:52:21 -0700 (PDT) X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Jul 2015 21:52:27 -0000 Ian Lepore wrote this message on Mon, Jul 06, 2015 at 14:11 -0600: > On Mon, 2015-07-06 at 19:33 +0000, Neel Natu wrote: > > Author: neel > > Date: Mon Jul 6 19:33:29 2015 > > New Revision: 285217 > > URL: https://svnweb.freebsd.org/changeset/base/285217 > > > > Log: > > Always assert DCD and DSR in bhyve's uart emulation. > > > > The /etc/ttys entry for a serial console in FreeBSD/x86 is as follows: > > ttyu0 "/usr/libexec/getty 3wire" vt100 onifconsole secure > > > > The initial terminal type passed to getty(8) is "3wire" which sets the > > CLOCAL flag. However reset(1) clears this flag and any programs that try > > to open the terminal will hang waiting for DCD to be asserted. > > > > Fix this by always asserting DCD and DSR in the emulated uart. > > > > The following discussion on virtualization@ has more details: > > https://lists.freebsd.org/pipermail/freebsd-virtualization/2015-June/003666.html > > > > Reported by: jmg > > Discussed with: grehan > > This seems like a wrong fix. A real 3-wire serial console doesn't have > DCD and DSR wired on. Why isn't the right fix here having the user with > this problem to do "stty -f /dev/ttyu0.lock clocal", maybe in rc.local? > > Hmmm, or maybe it would be right for getty to do the equivelent when it > sees a 3wire type? This seems more sane to me... Ok, so I just tested on real hardware, and something is wrong w/ FreeBSD's behavior... Could this be a change between 10 and HEAD? One a real machine (I manually added 3wire from HEAD so /etc/ttys is exactly the same between the two): # uname -a FreeBSD 10.1-STABLE FreeBSD 10.1-STABLE #102: Mon Jun 22 18:28:28 PDT 2015 jmg@carbon.funkthat.com:/a/home/jmg/consulting/netflix/new_sys/amd64/compile/bhgdb amd64 # echo $TERM vt100 # stty -a | grep clocal cflags: cread cs8 -parenb -parodd -hupcl clocal -cstopb -crtscts -dsrflow # reset Erase is backspace. # stty -a | grep clocal cflags: cread cs8 -parenb -parodd -hupcl clocal -cstopb -crtscts -dsrflow and under bhyve: # uname -a FreeBSD 11.0-CURRENT FreeBSD 11.0-CURRENT #11 r284880M: Fri Jul 3 14:14:49 PDT 2015 jmg@carbon.funkthat.com:/a/obj/a/home/jmg/FreeBSD.svn/HEAD/sys/IPSEC amd64 # echo $TERM vt100 # stty -a | grep clocal cflags: cread cs8 -parenb -parodd hupcl clocal -cstopb -crtscts -dsrflow # reset # stty -a | grep clocal cflags: cread cs8 -parenb -parodd hupcl -clocal -cstopb -crtscts -dsrflow I check and both .init and .lock have the same settings... reset -S both return the same termcap entry... -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."