TheGrebs.com:IRC Logs:#uml:2005:04:29

---	Log	opened Fri Apr 29 00:00:27 2005
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10:12	bodo	hi all
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12:29	jdike	hi guys
12:30	timster	:}
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13:30	mutex	wheeeee
13:30	mutex	so, i can't seem to get NFS mounts to work via tap devices
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13:31	mutex	all the right perms are in my /etc/exports, mounting works on every machine on the network execpt for the UML session
13:31	mutex	is their special voodoo I should be doing ?
13:31	mutex	*there
13:34	mutex	authenticated mount requests show up in my host machine's log, but nothing happens on the UML side
13:36	jdike	mutex: no errors?
13:36	mutex	nevermind i'm an idiot
13:36	mutex	# CONFIG_NFS is not set
13:37		* mutex smacks forenead
13:37	mutex	jdike: hard top diagnose errors inside anaconda since i don't have a shell :-(
13:42	mutex	ok, compiled NFS support in ;-)
13:43	mutex	but it still no worky
13:49	mutex	any hints or sanity checks are welcome ;-)
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14:04	BurtyB	you have portmaper service running?
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14:27	mutex	BurtyB: i assume so, it's redhat's installer :-p
14:27	mutex	it has worked in every other case when i've done NFS installs
14:28	jdike	mutex: firewalling on the host?
14:31	mutex	not afaik
14:31	mutex	turned off all my iptables
14:31	mutex	the thing has network connectivity
14:31	mutex	i can ping and what not
14:32	mutex	but NFS is screwy
14:32	BurtyB	nothing shows up in the term on the one your installing from or in the log on the nfs server?
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15:06	mutex	BurtyB: log on the NFS server says it got an authenticated mount request
15:06	mutex	also, i tried doing some http access via the tap device
15:06	mutex	that doesn't seem to work eithert
15:06	mutex	i am thinking there is some networking foo I don't understand
15:08	mutex	is the tap device sort of like... a IP that the host and the UML system communicate on ?
15:09	---	Channel: services.oftc.net changed the topic of #uml to: Welcome to #UML - current releases: 2.4.27-um1 \| 2.4.24-um1 (rock solid) \| 2.6.11-bs1 \| http://user-mode-linux.sf.net (Mainpage) \| http://www.usermodelinux.org (communitypage) \| http://www.user-mode-linux.org/~blaisorblade/ (SKAS/guest -bb and -bs patches) \| http://uml.harlowhill.com/ (Wiki page for documentation)
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15:21	jdike	mutex: no, it's like an ethernet strand between the host and UML
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15:22	mutex	right, but there is only one address specified
15:22	mutex	that's what confuses me
15:22	jdike	mutex: no, there are two
15:22	mutex	hmm
15:22	mutex	i'm used to the 'tun' model
15:22		* mutex looks
15:23	mutex	i run 'ifconfig tap0' and i see 1 IP
15:23	mutex	so clearly i'm not understanding something ;-)
15:24	jdike	mutex: and then ifconfig eth0 with a different one
15:24	mutex	ok, fine
15:24	mutex	that's all well and good, we are on the same page now ;-)
15:28	mutex	given my understanding then
15:28	mutex	I am unclear as to why network services don't work all that well
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15:34	mutex	curious if there could/would be any issue(i don't think there would be) with my 2.6 kernel and my 2.4UML
15:35	jdike	mutex: no
15:35	jdike	mutex: it's a network setup thing
15:37	mutex	yeah i figured
15:37	mutex	pinging works, but http and NFS definatly don't work
15:37	caker	iptables?
15:38	jdike	yeah, smells like a firewall
15:39	mutex	i swear there is no iptables
15:39	mutex	iptalbes -F, iptables -t nat -F
15:40	jdike	mutex: what does tcpdump on the tap device say?
15:40	mutex	interesting
15:40	mutex	it's arping for the default gateway
15:41	mutex	i was leaving the default gateway blank
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15:44	mutex	should i have the tap device on the same network class as my device NFS is listening on ?
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15:47	jdike	back
15:48	jdike	x86_64 box died
15:48	jdike	I have yet to find a kernel for it that UML doesn't kill
15:49	mutex	heh
15:49	mutex	for some reason
15:49	mutex	all the UML arp requests are not being answered
15:50	jdike	mutex: how is it pinging?
15:50	jdike	mutex: that requires arp
15:50	mutex	unclear
15:50	mutex	ping packets don't show up on the tcp dump session
15:50	mutex	so bizarre
15:51	mutex	... yeah that doesn't make any sense
15:51	mutex	well actually
15:52	mutex	i can ping from the host machine TO the tap interface
15:52	jdike	mutex: not a challenge
15:52	mutex	right
15:52	jdike	mutex: that is guaranteed to work
15:52	mutex	but the UML session can't get an answer to it's arp requests
15:52	mutex	so... why would it work one way but not the other
15:52	jdike	mutex: the interfaces have ARP enabled?
15:53	mutex	well
15:53	mutex	eth0 does
15:54	jdike	mutex: tap0?
15:55	mutex	i enabled it explicitly just now, and it does not seem to change anything
15:55		* mutex scratches his head
15:57	jdike	mutex: you're pinging the host, right?
15:58	mutex	no
15:58	mutex	i have not been able to test pinging from UML->host
15:59	mutex	hmmm
15:59	mutex	eth0, on the UML side corresponds to the tap device correct ? there is also the dummy0 device
16:03	mutex	ok, eth0 = tap0 it appears
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---	Log	closed Sat Apr 30 00:00:04 2005