Bug#917128: Bug

[Wolfgang Walter]

On Sunday, 24 February 2019 09:19:14 CET you wrote:
> Control: found -1  241-1
> 
> Wolfgang Walter [2019-02-23 11:39 +0100]:
> > The bug is back again: 241-1 again has this problem.
> 
> So this broke again due to
> https://github.com/systemd/systemd/commit/3907446f02 or
> https://github.com/systemd/systemd/commit/73d2bb08816 , i. e. as part of
> https://github.com/systemd/systemd/pull/11449 .
> 
> The logging should now be improved with v241, particularly which policy was
> applied. Do you have a chance to get a journal log (journalctl -b) from such
> a broken boot?
> 

Thanks for the commits, this helps a lot.

I could not find much more information in the log.

Basically I see (which I don't see with 240-6):

systemd-udevd[312]: Using default interface naming scheme 'v240'.
kernel: ´rename41: renamed from INT
...
systemd-udevd[312]: INT: Failed to rename network interface 41 from 'BASE' to 'I': Device or resource busy

I'll try again to add the

	OriginalName=eth* enp*

to the match of the .link files and see if this helps and so they won't match the vlan interfaces.
I didn#t try to match enp* the last time, because in the log I see eth0 and eth1.

The commit message of
	https://github.com/systemd/systemd/commit/3907446f02
seems to be wrong. It suggests that behaviour will only
change if there is a NamePolicy entry in the link file. Actually it will also change
behaviour if there is none.

So my link files matches vlan interfaces as they have the same mac as the
underlying physical device  and udev tries to rename it to the
name given with Name= whereas previously the
IN_SET(name_type, NET_NAME_USER, NET_NAME_RENAMED) (line 402) catched
and avoided the change.

I think systemd should restore the old behaviour in that sense that if there is
NO NamePolicy it also will check for IN_SET(name_type, NET_NAME_USER, NET_NAME_RENAMED).

This would be different from
	https://github.com/systemd/systemd/commit/73d2bb08816
as it only would restore old behaviour for the case that a link file does NOT contain
a NamePolicy.


How, by the way, does one set the name-scheme to version 239 as commit
	https://github.com/systemd/systemd/commit/73d2bb08816
implements?


I'll try to add
	NamePolicy=keep
to my link file. If I understand the man page and the commit correctly this
policy will match for my explicitly named devices (my vlan devices) and they
will not be renamed even though they have the same mac and therefor
match the link file. For the physical ethernet device which matches the
mac-address this NamePolicy will fail and therefor the Name= will be used.

Regards,
-- 
Wolfgang Walter
Studentenwerk München
Anstalt des öffentlichen Rechts