I might be doing something broken, but it still seems broken to me on
Ubuntu 16.04 on Raspberry PI despite having these fixes applied.
Package versions:
systemd: 229-4ubuntu7
udev: 229-4ubuntu7
Could you please take a look if I'm not doing something stupid (I
hopefully attached the relevant info):
$ ifconfig -a | head
enxb827eb739cc2 Link encap:Ethernet HWaddr b8:27:eb:73:9c:c2
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
$ ls -l /etc/udev/rules.d/80-net-setup-link.rules | tee -a report.txt
lrwxrwxrwx 1 root root 9 Aug 4 2016 /etc/udev/rules.d/80-net-setup-link.rules
-> /dev/null
$ grep net.ifnames=0 /proc/cmdline | tee -a report.txt
8250.nr_uarts=1 dma.dmachans=0x7f35 bcm2708_fb.fbwidth=1824
bcm2708_fb.fbheight=984 bcm2709.boardrev=0xa02082 bcm2709.serial=0xb2739cc2
smsc95xx.macaddr=B8:27:EB:73:9C:C2 bcm2708_fb.fbswap=1
bcm2709.uart_clock=48000000 vc_mem.mem_base=0x3dc00000
vc_mem.mem_size=0x3f000000 fsck.mode=force net.ifnames=0 dwc_otg.lpm_enable=0
console=ttyS0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4
elevator=deadline rootwait
$ cat /lib/udev/rules.d/73-usb-net-by-mac.rules
# Use MAC based names for network interfaces which are directly or indirectly
# on USB and have an universally administered (stable) MAC address (second bit
# is 0).
IMPORT{cmdline}="net.ifnames", ENV{net.ifnames}=="0", GOTO="usb_net_by_mac_end"
PROGRAM="/bin/readlink /etc/udev/rules.d/80-net-setup-link.rules",
RESULT=="/dev/null", GOTO="usb_net_by_mac_end"
ACTION=="add", SUBSYSTEM=="net", SUBSYSTEMS=="usb", NAME=="", \
ATTR{address}=="?[014589cd]:*", \
IMPORT{builtin}="net_id", NAME="$env{ID_NET_NAME_MAC}"
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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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