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---Problem Description---
Interface configuration not restored after driver unbind/bind
root@ltciofvtr-s824-lp8:~# ifconfig enP28p96s0f0
enP28p96s0f0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.10.10.11 netmask 255.255.255.0 broadcast 10.10.10.255
inet6 fe80::290:faff:fe7a:5840 prefixlen 64 scopeid 0x20<link>
ether 00:90:fa:7a:58:40 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 13 bytes 1046 (1.0 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
root@ltciofvtr-s824-lp8:~# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
source /etc/network/interfaces.d/*
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto ibmveth2
iface ibmveth2 inet static
address 9.47.68.120
netmask 255.255.240.0
network 9.47.64.0
broadcast 9.47.79.255
gateway 9.47.79.254
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 9.12.18.2
dns-search pok.stglabs.ibm.com
auto enP28p96s0f0
iface enP28p96s0f0 inet static
address 10.10.10.11
netmask 255.255.255.0
root@ltciofvtr-s824-lp8:~# ethtool -i enP28p96s0f0
driver: be2net
version: 11.1.0.0
firmware-version: 10.2.252.1913
expansion-rom-version:
bus-info: 001c:60:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: no
supports-priv-flags: yes
root@ltciofvtr-s824-lp8:~# echo -n 001c:60:00.0 >
/sys/bus/pci/drivers/be2net/unbind
root@ltciofvtr-s824-lp8:~# ls /sys/bus/pci/drivers/be2net
001c:60:00.1 001c:60:00.2 001c:60:00.3 bind module new_id remove_id
uevent unbind
root@ltciofvtr-s824-lp8:~# echo -n 001c:60:00.0 >
/sys/bus/pci/drivers/be2net/bind
root@ltciofvtr-s824-lp8:~# ls /sys/bus/pci/drivers/be2net
001c:60:00.0 001c:60:00.1 001c:60:00.2 001c:60:00.3 bind module new_id
remove_id uevent unbind
root@ltciofvtr-s824-lp8:~# ifconfig enP28p96s0f0
enP28p96s0f0: flags=4098<BROADCAST,MULTICAST> mtu 1500
ether 00:90:fa:7a:58:40 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
root@ltciofvtr-s824-lp8:~# ifup enP28p96s0f0
ifup: interface enP28p96s0f0 already configured
root@ltciofvtr-s824-lp8:~# ifdown enP28p96s0f0
RTNETLINK answers: Cannot assign requested address
root@ltciofvtr-s824-lp8:~# ifup enP28p96s0f0
root@ltciofvtr-s824-lp8:~# ifconfig enP28p96s0f0
enP28p96s0f0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.10.10.11 netmask 255.255.255.0 broadcast 10.10.10.255
inet6 fe80::290:faff:fe7a:5840 prefixlen 64 scopeid 0x20<link>
ether 00:90:fa:7a:58:40 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 16 bytes 1344 (1.3 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
---uname output---
Linux ltciofvtr-s824-lp8 4.9.0-12-generic #13-Ubuntu SMP Tue Jan 10 12:52:39
UTC 2017 ppc64le ppc64le ppc64le GNU/Linux
Machine Type = IBM,8286-42A LPAR
---Steps to Reproduce---
# echo -n 001c:60:00.0 > /sys/bus/pci/drivers/be2net/unbind
# echo -n 001c:60:00.0 > /sys/bus/pci/drivers/be2net/bind
== Comment - Vaishnavi Bhat
Hi,
To bind a device to a driver, the device must first not be controlled by any
other driver. Can you check for 'driver' in the below before you bind ?
$ tree /sys//bus/pci/devices/001c:60:00.0
Thank you.
== Comment - Murilo Fossa Vicentini
Just adding some information, this is not a driver specific issue, this was
also seen with tg3 and i40e adapters . This behavior is a regression when
compared to Ubuntu 16.04 where the interfaces where properly reconfigured upon
bind with the information set in /etc/network/interfaces
** Affects: ifupdown (Ubuntu)
Importance: Undecided
Assignee: Taco Screen team (taco-screen-team)
Status: New
** Tags: architecture-ppc64le bugnameltc-151103 severity-high
targetmilestone-inin1704
--
[Regression] Interface configuration not restored after driver unbind/bind
(generic)
https://bugs.launchpad.net/bugs/1660762
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