From owner-freebsd-bugs Wed Apr 18 0:20: 8 2001 Delivered-To: freebsd-bugs@hub.freebsd.org Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by hub.freebsd.org (Postfix) with ESMTP id 0ECCA37B423 for ; Wed, 18 Apr 2001 00:20:02 -0700 (PDT) (envelope-from gnats@FreeBSD.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.11.1/8.11.1) id f3I7K2V21131; Wed, 18 Apr 2001 00:20:02 -0700 (PDT) (envelope-from gnats) Date: Wed, 18 Apr 2001 00:20:02 -0700 (PDT) Message-Id: <200104180720.f3I7K2V21131@freefall.freebsd.org> To: freebsd-bugs@FreeBSD.org Cc: From: Peter Pentchev Subject: Re: misc/26649: diskless client can't share root with server Reply-To: Peter Pentchev Sender: owner-freebsd-bugs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org The following reply was made to PR misc/26649; it has been noted by GNATS. From: Peter Pentchev To: bbauman@wgate.com Cc: freebsd-gnats-submit@FreeBSD.org Subject: Re: misc/26649: diskless client can't share root with server Date: Wed, 18 Apr 2001 10:10:15 +0300 Eh? cpio copies device files just fine - it does a lstat() on the file name, detects a device, then does a mknod() when recreating the filesystem. [root@ringworld:v0 ~/tmp/dv]# (cd /; find -x dev | cpio -o -H newc) | cpio -i -H newc -d 557 blocks 557 blocks [root@ringworld:v0 ~/tmp/dv]# du dev 1 ./dev/fd 195 ./dev [root@ringworld:v0 ~/tmp/dv]# du /dev 1 /dev/fd 195 /dev [root@ringworld:v0 ~/tmp/dv]# Seems to work for me.. G'luck, Peter -- If this sentence were in Chinese, it would say something else. On Tue, Apr 17, 2001 at 09:20:57AM -0700, bbauman@wgate.com wrote: > > >Number: 26649 > >Category: misc > >Synopsis: diskless client can't share root with server > >Originator: Bruce Bauman > >Release: 4.3-RC > >Organization: > WorldGate Communications > >Environment: > >Description: > The rc.diskless2 script creates a /dev on the client by doing a mount_mfs followed by a cpio of the server's /dev. This won't work > because /dev/zero can't be copied to the client's /dev since it > provides an infinite supply of data. Other devices have similar > problems. > >How-To-Repeat: > Share the root filesystem between the boot server and client in a diskless configuration. No workee. > >Fix: > Rather than using cpio, we copy MAKEDEV to /tmp, then mount_mfs, then > MAKEDEV the appropriate device nodes in the client's /dev. Works like > a charm and allows you reduce the clutter in the diskless client's /dev. > > DEVFS would have been a possible solution for us, but we use dhclient on the diskless clients. dhclient relies on bpf, and bpf won't work > with DEVFS, so although it is a more elegant solution, it wouldn't > work for us. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message