Bug#939328: linux-image-4.19.0-5-amd64: buster and stretch-backports kernel causes interfaces rename back to ethX on HPe DL360g10

[Sven Hoexter <sven@stormbind.net>]

Package: src:linux
Version: 4.19.37-5+deb10u2
Severity: normal

Hi,
installing the latest update caused our NICs to be renamed from "enoX" back to "ethX". We first experienced
this issue on Debian/buster on HPe DL360g10 and now found the same issue with the latest upload of the same
kernel to stretch-backports.

We're now working around this issue by using
$ cat /etc/systemd/network/101-onboard-rd.link 
[Link]
NamePolicy=onboard kernel database slot path
MACAddressPolicy=none


That said on a system still running Debian/stretch with the old working kernel, without
the systemd workaround applied I've the following:

svenhoexter@docker-018:~$ uname -a
Linux docker-018 4.19.0-0.bpo.5-amd64 #1 SMP Debian 4.19.37-4~bpo9+1 (2019-06-19) x86_64 GNU/Linux

svenhoexter@docker-018:~$ udevadm test-builtin net_id /sys/class/net/eno5 2>/dev/null
ID_NET_NAME_ONBOARD=eno5
ID_NET_NAME_PATH=enp93s0f0

svenhoexter@docker-018:~$ SYSTEMD_LOG_LEVEL=debug udevadm test-builtin net_setup_link /sys/class/net/eno5
calling: test-builtin
=== trie on-disk ===
tool version:          232
file size:         8441068 bytes
header size             80 bytes
strings            1846908 bytes
nodes              6594080 bytes
Load module index
Found container virtualization none
timestamp of '/etc/systemd/network' changed
Skipping overridden file: /lib/systemd/network/99-default.link.
Parsed configuration file /etc/systemd/network/99-default.link
Created link configuration context.
ID_NET_DRIVER=i40e
No matching link configuration found.
Unload module index
Unloaded link configuration context.


On a system with the new kernel and the applied workaround we've:

svenhoexter@docker-019:~$ uname -a
Linux docker-018 4.19.0-5-amd64 #1 SMP Debian 4.19.37-5+deb10u2 (2019-08-08) x86_64 GNU/Linux

svenhoexter@docker-019:~$ udevadm test-builtin net_id /sys/class/net/eno5 2>/dev/null
ID_NET_NAMING_SCHEME=v240
ID_NET_NAME_ONBOARD=eno5
ID_NET_NAME_PATH=enp93s0f0

svenhoexter@docker-019:~$ SYSTEMD_LOG_LEVEL=debug udevadm test-builtin net_setup_link /sys/class/net/eno5
=== trie on-disk ===
tool version:          241
file size:         9492053 bytes
header size             80 bytes
strings            2069269 bytes
nodes              7422704 bytes
Load module index
Failed to read $container of PID 1, ignoring: Permission denied
Found container virtualization none.
timestamp of '/etc/systemd/network' changed
Skipping overridden file '/usr/lib/systemd/network/99-default.link'.
Parsed configuration file /etc/systemd/network/99-default.link
Parsed configuration file /etc/systemd/network/101-onboard-rd.link
Created link configuration context.
ID_NET_DRIVER=i40e
Config file /etc/systemd/network/101-onboard-rd.link applies to device eno5
link_config: autonegotiation is unset or enabled, the speed and duplex are not writable.
link_config: could not set ethtool features for eno5
Could not set offload features of eno5: Operation not permitted
eno5: Device has name_assign_type=4
Using default interface naming scheme 'v240'.
eno5: Policy *onboard* yields "eno5".
ID_NET_LINK_FILE=/etc/systemd/network/101-onboard-rd.link
ID_NET_NAME=eno5
Unload module index
Unloaded link configuration context.


Any hint on how to provide additional input is appreciated.

Sven