From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <44E692D6.8060108@lanl.gov>
Date: Fri, 18 Aug 2006 22:25:58 -0600
From: Ronald G Minnich <rminnich@lanl.gov>
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To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] err 2: arena creation time after last write time
References: <3096bd910608180440o216712c4i68a577245469ff92@mail.gmail.com>	<3e1162e60608180745p50fb2980n5747f90855e4f255@mail.gmail.com>
	<3096bd910608181728o3fd07611l893af021333be219@mail.gmail.com>
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here's how I run qemu so as to get things going. This allows me to 
drawterm into it.

qemu qemu.vesaroot &

Gets me a cpu kernel going

sleep 5 && dhcpd -d

gets me the dhcpd

a run looks like this:

[root@q plan9]# qemu qemu.vesaroot & sleep 5&& dhcpd -d
[1] 4674
Connected to host network interface: tun1
Could not open '/dev/kqemu' - QEMU acceleration layer not activated
Internet Systems Consortium DHCP Server V3.0.2-RedHat
Copyright 2004 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/
Wrote 0 deleted host decls to leases file.
Wrote 0 new dynamic host decls to leases file.
Wrote 17 leases to leases file.
Listening on LPF/tun1/46:9c:6d:94:f5:1f/172.20.0/24
Sending on   LPF/tun1/46:9c:6d:94:f5:1f/172.20.0/24

No subnet declaration for ath0 (192.168.0.104).
** Ignoring requests on ath0.  If this is not what
    you want, please write a subnet declaration
    in your dhcpd.conf file for the network segment
    to which interface ath0 is attached. **

Sending on   Socket/fallback/fallback-net
DHCPDISCOVER from 52:54:00:12:34:56 via tun1
DHCPOFFER on 172.20.0.2 to 52:54:00:12:34:56 via tun1
Dynamic and static leases present for 172.20.0.2.
Remove host declaration qemu or remove 172.20.0.2
from the dynamic address pool for 172.20.0/24
DHCPREQUEST for 172.20.0.2 (172.20.0.1) from 52:54:00:12:34:56 via tun1
DHCPACK on 172.20.0.2 to 52:54:00:12:34:56 via tun1


(note the DHCPREQUEST -- that's my plan 9)
(the error message is unimportant)

OK, what's the config look like? dhcpd.conf:
subnet 172.20.0.0 netmask 255.255.255.0 {
               range 172.20.0.2 172.20.0.2 ;
               default-lease-time 600;
                  max-lease-time 7200;
               option subnet-mask 255.255.255.0;
                 option routers 172.20.0.1;
             }
host qemu {
         hardware ethernet 52:54:00:12:34:56;
         fixed-address xtest;
}

xtest is (from /etc/hosts):
172.20.0.2 xtest


ok but how did tun1 get configured? You need to set up /etc/qemu-ifup

[root@q etc]# cat /etc/qemu-ifup
#!/bin/sh
tun=$1
sudo /sbin/ifconfig $1 172.20.0.1
sudo /sbin/iptables -N nat
sudo /sbin/iptables -t nat -F
sudo /sbin/iptables -t nat -A POSTROUTING -s 172.20.0.1 -j MASQUERADE
sudo /sbin/iptables -t nat -A POSTROUTING -d 172.20.0.1 -o $tun
sudo echo 1 > /proc/sys/net/ipv4/ip_forward
[root@q etc]#


this allows me to drawterm into the plan 9 cpu server running on my laptop.

If this all works, then put it in the wiki :-) This is on FC4.

ron