This bug was fixed in the package systemd - 229-4ubuntu7
---------------
systemd (229-4ubuntu7) xenial-proposed; urgency=medium
* Add pre-dependency to dpkg >= 1.17.14 on udev, to ensure that
dpkg-maintscript-helper symlink_to_dir is available. (LP: #1585406)
* Add activation rate limiting for socket units. (LP: #1568094)
* Split out udev rule to name USB network interfaces by MAC address into
73-usb-net-by-mac.rules, so that it's easier to disable. (Closes: #824025)
* 73-usb-net-by-mac.rules: Disable when net.ifnames=0 is specified on the
kernel command line or if /etc/udev/rules.d/80-net-setup-link.rules is a
symlink to /dev/null, to be consistent with disabling the *.link files and
the documented way to disable ifnames. (Closes: #824491, LP: #1593379)
* coredump: Fix "Coredump file descriptor missing". (LP: #1602256)
-- Martin Pitt <martin.p...@ubuntu.com> Tue, 12 Jul 2016 17:37:25
+0200
** Changed in: systemd (Ubuntu Xenial)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1593379
Title:
systemd 229-4ubuntu6 ignores net.ifnames=0 on USB or
/etc/udev/rules.d/80-net-setup-link.rules being a /dev/null symlink
Status in systemd package in Ubuntu:
Fix Released
Status in systemd source package in Xenial:
In Progress
Status in systemd package in Debian:
Fix Released
Bug description:
Description: Ubuntu 16.04 LTS
Release: 16.04
The upgrade to systemd/udev 229-4ubuntu6 breaks net.ifnames=0 for USB
devices.
It appears the regression is here:
* Set MAC based name for USB network interfaces only for universally
administered (i. e. stable) MACs, not for locally administered (i. e.
randomly generated) ones. Drop /lib/systemd/network/90-mac-for-usb.link
(as link files don't currently support globs for MACAddress=) and replace
with an udev rule in /lib/udev/rules.d/73-special-net-names.rules.
(Closes: #812575, LP: #1574483)
As Raspberry Pi's use eth0 via USB, this breaks running systems.
Before:
ii systemd 229-4ubuntu4 armhf system and service manager
ii udev 229-4ubuntu4 armhf /dev/ and hotplug management daem
3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP
mode DEFAULT group default qlen 1000
link/ether b8:27:eb:16:39:e9 brd ff:ff:ff:ff:ff:ff
After:
ii systemd 229-4ubuntu6 armhf
system and service manager
ii udev 229-4ubuntu6 armhf
/dev/ and hotplug management daemon
3: enxb827eb1639e9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast state UP mode DEFAULT group default qlen 1000
link/ether b8:27:eb:16:39:e9 brd ff:ff:ff:ff:ff:ff
cat /proc/cmdline
dma.dmachans=0x7f35 bcm2708_fb.fbwidth=656 bcm2708_fb.fbheight=416
bcm2709.boardrev=0xa01041 bcm2709.serial=0x37b38253
smsc95xx.macaddr=B8:27:EB:B3:82:53 bcm2708_fb.fbswap=1 bcm2709.disk_led_gpio=47
bcm2709.disk_led_active_low=0 sdhci-bcm2708.emmc_clock_freq=250000000
vc_mem.mem_base=0x3dc00000 vc_mem.mem_size=0x3f000000 net.ifnames=0
dwc_otg.lpm_enable=0 console=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2
rootfstype=ext4 elevator=deadline rootwait
With the default interfaces configuration, all networking is lost on
reboot after upgrade.
SRU TEST CASE
=============
* Boot with "net.ifnames=0" on the kernel command line, and connect an USB
ethernet device. It will still be called enxDEADBEEF with current xenial. With
the -proposed version it will instead keep the kernel name, like "usb0" as
intended.
* Do "sudo ln -s /dev/null /etc/udev/rules.d/80-net-setup-link.rules"
(the other documented way to disable ifnames) and do the above
connect/name check test again.
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