Date: Thu, 2 Jul 2009 16:30:03 GMT From: Tim Bishop <tim@bishnet.net> To: freebsd-gnats-submit@FreeBSD.org Subject: amd64/136251: xn0 doesn't DHCP Message-ID: <200907021630.n62GU32G099711@www.freebsd.org> Resent-Message-ID: <200907021640.n62Ge4ug063557@freefall.freebsd.org>
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>Number: 136251
>Category: amd64
>Synopsis: xn0 doesn't DHCP
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-amd64
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Jul 02 16:40:04 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator: Tim Bishop
>Release: FreeBSD 8.0-CURRENT amd64
>Organization:
>Environment:
FreeBSD xenserver.kent.ac.uk 8.0-CURRENT FreeBSD 8.0-CURRENT #0: Wed Jul 1 22:55:53 BST 2009 tdb@xenserver.kent.ac.uk:/usr/obj/usr/src/sys/XENHVM amd64
Running 8.0-CURRENT as of yesterday on Citrix XenServer 5.5.0.
>Description:
When using the amd64 XENHVM kernel (which has the xenpci
device) the machine has a network device called xn0:
xenpci0: <Xen Platform Device> port 0xc000-0xc0ff mem 0xf2000000-0xf2ffffff irq 30 at device 3.0 on pci0
xenbus0: <Xen Devices> on xenpci0
xn0: <Virtual Network Interface> at device/vif/0 on xenbus0
xn0: Ethernet address: 36:ab:02:63:a3:ff
However, this device doesn't behave like a normal network
device, so adding the following to rc.conf doesn't do DHCP:
ifconfig_xn0="DHCP"
After some poking around I realised dhclient was launched
by devd. However, the xn0 device has properties which don't
match the existing rules:
setting system=IFNET
setting subsystem=xn0
setting type=ATTACH
>How-To-Repeat:
See above: 8.0-CURRENT, amd64 XENHVM kernel, Citrix XenServer.
>Fix:
I've worked around this problem by adding the following
entry to /etc/devd.conf at line 77 (after the IFNET/LINK_UP/802.11
section):
notify 0 {
match "system" "IFNET";
match "subsystem" "xn[0-9]+";
match "type" "ATTACH";
action "/etc/rc.d/dhclient quietstart $subsystem";
};
This is my first look at devd, so apologies if this fix
isn't appropriate.
It'd be great if this fix could make it in to 8.0.
>Release-Note:
>Audit-Trail:
>Unformatted:
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