Mika Laitio wrote:
True, the ordering is not exactly the same everytime. One will need to provide PCI Bus related info also to a practical udev configuration to get things sorted out in a sane way, rather than anything else.At least in Mandriva, the order and naming of network adapters are handled by using a this kind of udev rule which prevents for example eth0 and eth1 to swap between boots: [lamikr@iiris rules.d]$ cat 70-persistent-net.rules # 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. # Drakx-net rule for eth0 (00:24:e8:9e:66:13) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:11:22:33:44:55", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0 # PCI device 0x8086:0x4232 (iwlagn) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="11:22:33:44:55:66", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"" I am not sure whether udev rules itself can originally generate this file or whether it's mandriva's own tools/scripts that will generate this file and add all new adapters it finds that are not yet in the file. Mika
The eth drivers have one advantage: nearly all of them have an associated MAC address, which is (supposed to be, anyway) globally (the planet, not just the system) unique. It is, therefore, easy enough to associate a specific NIC with a specific name, as shown. If we keep some sort of configuration table: For those boards that have eeproms, and for which the eeprom contains a serial number, or other unique identifier, we could do the same thing. Alternatively, we could use the PCI address (bus/device/unit). USB devices can have serial numbers, but it isn't common. Sounds like we need to think about keeping a table, having some udev rules to work with it, and some utility to manage it. RFQ time?
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