[systemd-devel] system is not match systemd.link configs

[Andrei Borzenkov]

On Thu, Oct 24, 2024 at 6:29 PM Henti Smith <henti at gaydonsmith.co.uk> wrote:
>
> Good day everybody
>
> I have two link files for mvc-sw1 and mvc-sw2.
>
> # mvc-sw1
> ```
> # Fixed MAC and name for eno2 (Switch 1 connection) when debug board is plugged in
> # Renamed to mvc-sw1 by PCI Address and set custom MAC address.
> [Match]
> Property=DEVPATH=/devices/pci0000:00/0000:00:10.0/0000:05:00.0/net/eno2
>
> [Link]
> MACAddress=02:00:00:00:05:00
> Name=mvc-sw1
> ```
>
> # mvc-sw2
> ```
> # Fixed MAC and name for enp6s0 (Block Diagram) when debug board is plugged in
> # Renamed to mvc-sw2 by PCI Address and set custom MAC address.
> [Match]
> Property=DEVPATH=/devices/pci0000:00/0000:00:11.0/0000:06:00.0/net/enp6s0
>

These names are already the result of earlier renamoing. I am not sure
systemd/udev/networkd will rename the second time.

> [Link]
> MACAddress=02:00:00:00:06:00
> Name=mvc-sw2
> ```
>
> I update the initrd file and rebooted and the system comes up with eno2 and enp6s0 instead of the expected mvc-sw1 and mvc-sw1.
> Looking at udevadm info I get the following
> ```
> P: /devices/pci0000:00/0000:00:10.0/0000:05:00.0/net/eno2
> L: 0
> E: DEVPATH=/devices/pci0000:00/0000:00:10.0/0000:05:00.0/net/eno2
> E: INTERFACE=eno2
> E: IFINDEX=4
> E: SUBSYSTEM=net
> E: USEC_INITIALIZED=8968404
> E: ID_NET_NAMING_SCHEME=v245
> E: ID_NET_NAME_ONBOARD=eno2
> E: ID_NET_LABEL_ONBOARD=Onboard ETHERNET Controller
> E: ID_NET_NAME_PATH=enp5s0
> E: ID_BUS=pci
> E: ID_VENDOR_ID=0x11ab
> E: ID_MODEL_ID=0x0f13
> E: ID_PCI_CLASS_FROM_DATABASE=Network controller
> E: ID_PCI_SUBCLASS_FROM_DATABASE=Ethernet controller
> E: ID_VENDOR_FROM_DATABASE=Marvell Technology Group Ltd.
> E: ID_PATH=pci-0000:05:00.0
> E: ID_PATH_TAG=pci-0000_05_00_0
> E: ID_NET_DRIVER=oak
> E: ID_NET_LINK_FILE=/etc/systemd/network/10-oxb-mvc-sw1-debug.link
> E: ID_NET_NAME=eno2
> E: SYSTEMD_ALIAS=/sys/subsystem/net/devices/eno2 /sys/subsystem/net/devices/eno2
> E: TAGS=:systemd:
> ```
>
> ```
> P: /devices/pci0000:00/0000:00:11.0/0000:06:00.0/net/enp6s0
> L: 0
> E: DEVPATH=/devices/pci0000:00/0000:00:11.0/0000:06:00.0/net/enp6s0
> E: INTERFACE=enp6s0
> E: IFINDEX=5
> E: SUBSYSTEM=net
> E: USEC_INITIALIZED=8928106
> E: ID_NET_NAMING_SCHEME=v245
> E: ID_NET_NAME_PATH=enp6s0
> E: ID_BUS=pci
> E: ID_VENDOR_ID=0x11ab
> E: ID_MODEL_ID=0x0f13
> E: ID_PCI_CLASS_FROM_DATABASE=Network controller
> E: ID_PCI_SUBCLASS_FROM_DATABASE=Ethernet controller
> E: ID_VENDOR_FROM_DATABASE=Marvell Technology Group Ltd.
> E: ID_PATH=pci-0000:06:00.0
> E: ID_PATH_TAG=pci-0000_06_00_0
> E: ID_NET_DRIVER=oak
> E: ID_NET_LINK_FILE=/etc/systemd/network/10-oxb-mvc-sw2-debug.link
> E: ID_NET_NAME=enp6s0
> E: SYSTEMD_ALIAS=/sys/subsystem/net/devices/enp6s0 /sys/subsystem/net/devices/enp6s0
> E: TAGS=:systemd:
> ```
>
> ID_NET_LINK_FILE seems to indicate it used the link file, but I'm not sure why the interface names were not changed ?
>
> I'm on Ubuntu Focal 245.4
>
> Any guidance would be appreciated.
>
> Kind regards
> Henti