[systemd-devel] networkd-218 seems to ignore .link files

[Tom Gundersen]

On Tue, Apr 14, 2015 at 7:08 PM, Andrew Cooks <acooks at linux.com> wrote:
> On Tue, Jan 13, 2015 at 6:46 AM, Jan Engelhardt <jengelh at inai.de> wrote:
>>
>>
>> On Monday 2015-01-12 18:29, Tom Gundersen wrote:
>> >> In systemd-218, I have configured the following testcase:
>> >>
>> >> /etc/systemd/network# ls -al
>> >> total 20
>> >> drwxr-xr-x 2 root root 4096 Jan 11 18:14 .
>> >> drwxr-xr-x 5 root root 4096 Jan 11 16:23 ..
>> >> -rw-r--r-- 1 root root   96 Jan 11 18:14 99a-ether.link
>> >
>> >Hm, isn't this just a problem of 99a-ether.link being ordered after
>> >99-default.link?
>>
>> Well, the manpage states: "All link files are collectively
>> sorted and processed in lexical order", with that, I would assume
>> that 99a, being processed after 99, would override 99.
>>
>> >It works for me when naming it 98-ether.link instead.
>>
>> Not in my case. I have a feeling networkd won't touch
>> [08:00:27:0a:c5:b2]'s interface name because it has already
>> been named by udev to enp0s3 before networkd got a chance to run.
>> Could that be it?
>
>
> I'm having a similar problem while running systemd version-219. Did you work
> out what was wrong?
>
> My link file is ignored even when I symlink
> /etc/systemd/network/99-default.link to /dev/null. I don't see anything
> interesting in 'journalctl'.
>
> # udevadm info /sys/class/net/eth0
> P: /devices/pci0000:00/0000:00:04.0/0000:01:00.0/net/eth0
> E: DEVPATH=/devices/pci0000:00/0000:00:04.0/0000:01:00.0/net/eth0
> E: ID_BUS=pci
> E: ID_MODEL_FROM_DATABASE=RTL8111/8168/8411 PCI Express Gigabit Ethernet
> Contror
> E: ID_MODEL_ID=0x8168
> E: ID_NET_DRIVER=r8169
> E: ID_NET_NAME_MAC=enx000db936008c
> E: ID_NET_NAME_PATH=enp1s0
> E: ID_OUI_FROM_DATABASE=PC Engines GmbH
> E: ID_PATH=pci-0000:01:00.0
> E: ID_PATH_TAG=pci-0000_01_00_0
> E: ID_PCI_CLASS_FROM_DATABASE=Network controller
> E: ID_PCI_SUBCLASS_FROM_DATABASE=Ethernet controller
> E: ID_VENDOR_FROM_DATABASE=Realtek Semiconductor Co., Ltd.
> E: ID_VENDOR_ID=0x10ec
> E: IFINDEX=3
> E: INTERFACE=eth0
> E: SUBSYSTEM=net
> E: SYSTEMD_ALIAS=/sys/subsystem/net/devices/eth0
> E: TAGS=:systemd:
> E: USEC_INITIALIZED=53326
>
>
> # networkctl status --no-pager eth0
> ��● 3: eth0
>    Link File: n/a
> Network File: n/a
>         Type: ether
>        State: off (unmanaged)
>         Path: pci-0000:01:00.0
>       Driver: r8169
>       Vendor: Realtek Semiconductor Co., Ltd.
>        Model: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
>   HW Address: 00:0d:b9:36:00:8c (PC Engines GmbH)
>          MTU: 1500
>
>
> # cat /etc/systemd/network/01-mgmt.link
> [Match]
> Path=pci-0000:01:00.0
> Type=ether

Type must be the same as what is returned in DEVTYPE=, which I guess
is unset for this device. So drop this and it should work.

I see where the confusion stems from though, as we try to be helpful
and use a heuristic to print a Type in networkctl even when the kernel
does not expose a type. We probably should not do that, or allow the
same to be used in the .link matching logic (the heuristic is unlikely
to be perfect, so I hesitate a bit with the latter).

Cheers,

Tom

> [Link]
> Name=mgmt
> MACAddressPolicy=persistent
>
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