mounting NFSROOT via wrong iface (again :( ) - very long email

[Carsten Aulbert]

Hi

On Monday 19 December 2011 09:46:22 Carsten Aulbert wrote:
> It does take the bootif variable from PXE, but somehow thinks the secondary
> DHCP reply more important. If I disable the second DHCP it works nicely.
> Any idea why this is?

I'm still wading through all this, and I think there is a bug in do_netsetup() 
(file 'live' from live-initramfs-tools 2.0.15-1)

Unless I'm wrong, this is what happens:

/scripts/live-premount/select_eth_device checks for nics with a link

in my case it results in

cat /conf/param.conf
DEVICE=eth1
DEVICE=eth2

then in or after live-premount/modules this file gets sourced

+ /scripts/live-premount/modules
+ [ -e /conf/param.conf ]
+ . /conf/param.conf
+ DEVICE=eth1
+ DEVICE=eth2

and DEVICE ends up being only eth2 (wrong in my case)

do_netsetup then sees I want to use NFS:

+ [ -z nfs ]

and starts ipconfig eth2 only and from there on it's all wrong...

+ ipconfig eth2
tee /netboot.config
IP-Config: eth2 hardware address 00:30:48:da:88:cd mtu 1500 DHCP RARP
[   16.388891] RPC: Registered udp transport module.
[   16.393590] RPC: Registered tcp transport module.
[   16.398288] RPC: Registered tcp NFSv4.1 backchannel transport module.
[   16.410214] Slow work thread pool: Starting up
[   16.414705] Slow work thread pool: Ready
[   16.418668] FS-Cache: Loaded
[   16.431832] FS-Cache: Netfs 'nfs' registered for caching
IP-Config: eth2 guessed broadcast address 172.31.255.255
IP-Config: eth2 guessed nameserver address 172.28.22.4
IP-Config: eth2 complete (from 172.28.22.4):
 address: 172.25.12.7      broadcast: 172.31.255.255   netmask: 255.240.0.0     
 gateway: 0.0.0.0          dns0     : 172.28.22.4      dns1   : 0.0.0.0         
 rootserver: 172.28.22.4 rootpath: 
 filename  : 
+ OLDHOSTNAME=titan3
+ . /tmp/net-eth2.conf
+ DEVICE=eth2
+ IPV4ADDR=172.25.12.7
+ IPV4BROADCAST=172.31.255.255
+ IPV4NETMASK=255.240.0.0
+ IPV4GATEWAY=0.0.0.0
+ IPV4DNS0=172.28.22.4
+ IPV4DNS1=0.0.0.0
+ HOSTNAME=
+ DNSDOMAIN=
+ NISDOMAIN=
+ ROOTSERVER=172.28.22.4
+ ROOTPATH=
+ filename=
+ [ -z ]

[...]

Why is the previous knowledge of "bootif" thrown away and it just stoically 
walks on?

Cheers

Carsten