Taming udev

ReaperX7 · 08-17-2015, 09:03 PM

I'm wondering if something along the lines of this file is needed to tame udev on my machine from auto-naming devices whatever it pleases, namely my network device.

/etc/udev/rules.d/70-persistent-net.rules

Code:

# This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single
# line, and change only the value of the NAME= key.

# net device asix
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:25:9c:65:22:c8", ATTR{dev_id}=="0x0", ATTR{type}=="1", NAME="eth0"

Any suggestions that I also can filter into the eudev buildscript I use at Slackworks?

I had to actually create and import this file from LFS.

kingbeowulf · 08-18-2015, 01:16 AM

I recall back in 13.x, 14.0? that net devices flipped if you had multiple eth0, eth1, especially broadcom wifi which often used eth1 and not wlan0, or if something else confused udev. However, since a clean install of 14.1 and recently of -current, this has not been a problem.
Udev messes up network rules http://www.linuxquestions.org/questi...-rules-907381/
[SOLVED] slackware 13.37 problem, udev change network interface randomly, wicd http://www.linuxquestions.org/questi...y-wicd-891977/
[SOLVED] my eth number keep changing after follow -current http://www.linuxquestions.org/questi...urrent-873880/
...
Your version of 70-persistent-net.rules appears to be VERY OLD. Mine are, for example:

Slackware-curent
/etc/udev/rules.d/70-persistent-net.rules

Code:

# PCI device 0x10ec:/sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:24:21:68:d8:ba", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x168c:/sys/devices/pci0000:00/0000:00:1c.2/0000:02:00.0 (ath9k)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:25:d3:25:ea:68", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"

Slackware64-14.1 multilib
/etc/udev/rules.d/70-persistent-net.rules

Code:

# PCI device 0x10ec:/sys/devices/pci0000:00/0000:00:07.0/0000:02:00.0 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:19:db:63:78:2f", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

both autogenerated during installation and configuration with no input from me. The other systems (2) and VMs (4) are the same.

its a bit surprising that you are having this issue.

moonfrog · 08-18-2015, 06:54 AM

I've just been adding "net.ifnames=0" to the kernel boot line and not looking back