Re: [Devil-linux-develop] Feature request - Enable "nameif" to associate MAC address with correct interface name.

[Dominic R. <dl...@ed...>]

On 26/04/2010 16:13, Heiko Zuerker wrote:
> Hey,
>
> Quoting Dominic Raferd<dl...@ed...>:
>
>    
>> Regarding udev, I found info at
>> http://www.reactivated.net/writing_udev_rules.html#why about how it
>> works which mentions some udev tools - udevinfo, udevtest, udevtrigger,
>> udevcontrol - which are missing in DL, and might be worth adding.
>>      
> Those are the old tools, they have been replaced by 'udevadm'.
> Excecute 'udevadm help' for details.
>    
cool, thanks
>> udevtrigger seems to be the way to reprocess udev rules without
>> rebooting. Altering (or deleting) 70-persistent-net.rules + udevtrigger
>> + /etc/init.d/network restart should be a way to fix a broken network
>> connection after a hardware change. At the moment I think you have to
>> save-config and reboot instead of udevtrigger.
>>      
> We use the the trigger and settle commands in /etc/init.d/boot.
>    
So I see, and I learn something!
>    
>> If this worked, then a new option could be added for the network script,
>> say '-redetect' which would stop the network, delete
>> 70-persistent-net.rules, then run udevtrigger before starting the
>> network again. It should also post an advisory message that the change
>> will not persist under DL unless configuration is saved.
>>      
>    
To fix a simple broken network connection after a hardware change 
(especially if using the autoselect option in Setup/Network i.e. letting 
udev choose the network card module), here is a patch for the network 
script (DL 1.4RC3):

--- /etc/init.d/network 1980-01-01 01:01:01.000000000 +0000
+++ /home/z-shares/scripts/network      2010-04-26 19:21:47.000000000 +0100
@@ -517,0 +518,15 @@
+
+       redetect)
+               $0 stop $ONLY_INTERFACE
+               sleep 1
+               echo -n "Removed persistent record(s) for "
+               egrep -o "NAME=\"[^\"]*" 
/etc/udev/rules.d/70-persistent-net.rules|awk -F \" '{print $2}'
+               rm /etc/udev/rules.d/70-persistent-net.rules
+               udevadm trigger --subsystem-match=net
+               udevadm settle
+               echo -n "Redetected and recreated persistent record(s) for "
+               egrep -o "NAME=\"[^\"]*" 
/etc/udev/rules.d/70-persistent-net.rules|awk -F \" '{print $2}'
+               $0 start $ONLY_INTERFACE
+               echo "Network devices redetected. Run save-config to 
make changes permanent."
+               ;;
+
@@ -519 +534 @@
-               echo "Usage: $0 {start|stop|restart} [interface]"
+               echo "Usage: $0 {start|stop|restart|redetect} [interface]"