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This reverts commit 152c8946b3a93bb2c086568832d614cb54f11e13.
The kernel patch
https://lore.kernel.org/linux-usb/20240605153340.25694-1-gmazyland@gmail.com/
is now in net-next branch, and will be hopefully merged soon.
Note that Debian's 73-usb-net-by-mac.link now also supports the kernel patch:
https://salsa.debian.org/systemd-team/systemd/-/commit/c1afbb2dc295929085be86072c7942c8517ec598
So, hopefully, the change is ready. Let's reapply it.
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This reverts commit 0f5a529217f1327f020ab54deed09e6fae1f1fef.
As discussed in https://github.com/systemd/systemd/issues/33104,
that patch caused problems in Debian which has a udev drop-in with
[Match]
Path=*-usb-*
[Link]
NamePolicy=mac
The rename fails:
eth0: Policy *mac* yields "enx00*".
eth0: /usr/lib/udev/rules.d/80-net-setup-link.rules:11 NAME 'enx00*'
eth0: /usr/lib/udev/rules.d/99-systemd.rules:69 RUN '/usr/lib/systemd/systemd-sysctl --prefix=/net/ipv4/conf/$name --prefix=/net/ipv4/neigh/$
eth0: sd-device: Created database file '/run/udev/data/n9' for '/devices/pci0000:00/0000:00:1c.4/0000:02:00.0/0000:03:01.0/0000:05:00.0/0000:
eth0: Failed to rename network interface 9 from 'eth0' to 'enx00*': File exists
eth0: sd-device: Created database file '/run/udev/data/n9' for '/devices/pci0000:00/0000:00:1c.4/0000:02:00.0/0000:03:01.0/0000:05:00.0/0000:
eth0: Failed to process device, ignoring: File exists
Two network interfaces have the same MAC and it's not marked NET_ADDR_STOLEN.
In this case the conflict is very visible because it causes the rename to fail,
but it would also occur in other cases, for alternative names.
A patch has been submitted for r8152 to properly set NET_ADDR_STOLEN:
https://lore.kernel.org/linux-usb/20240605153340.25694-1-gmazyland@gmail.com/T/#u
Let's revert this now to avoid a regression. We can try again after the kernel
issue is resolved.
Closes https://github.com/systemd/systemd/issues/33104.
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Alternative names are basically free, hence add "mac" there too, to make
it easier to see what names could be used as primary options too.
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Arguably, CC0 is just fine for examples since they are not code. But it's
easier to be consistent and just use MIT-0 for all "documentation". Thus,
the license is changed similarly code examples under man/.
Based on 'git shortlog -ns network/*' and 'git log -p', the following folks
should ack this:
Zbigniew Jędrzejewski-Szmek
Lennart Poettering
Tom Gundersen
Yu Watanabe
Daan De Meyer
Marc-André Lureau
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Same justification as the previous commit.
$ for i in network/*-*; do git blame $i;done | less
shows that those files were written by Tom Gundersen, Lennart Poettering, Yu
Watanabe, me, and Marc-André Lureau.
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Closes #12098.
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If "keep" policy is specified, and the interface has a name that is
NET_NAME_USER or NET_NAME_RENAMED, we stop processing rules. "keep" should
probably be specified either first or last depending on the preference.
This partially reimplements 55b6530baacf4658a183b15b010a8cf3483fde08, in the
sense that if the "keep" policy is not specified, and if the interface has
a NamingPolicy, it will be renamed, even if it had a name previously.
So this breaks backwards compatibility in this case, but that's more in line
with what users expect.
Closes #9006.
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Newer kernels export meta-information about the origin of an ifname. Respect this
from the ifname rename logic. We do not rename any interfaces that was originally
named by userspace, nor once which have already been renamed from userspace.
Moreover, we optionally do not (the default) rename interfaces which the kernel
claims to have named in a predictable way.
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This is private configuraiton, so let's not pollute the namespace (and hence make Debian happy :) ).
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