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common: nameif: Handle nested dsa ports

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In setups like this...

    CPU
    eth0
     |
.----0----.
| dst0sw0 |
'-1-2-3-4-'
        |
   .----0----.
   | dst1sw0 |
   '-1-2-3-4-'

...both eth0 and dst0sw0p4 are DSA ports. But the latter is _also_ a
physical port as far as devlink is concerned. As a result, it would
first be marked as "internal" and is then instantly reclassified as a
"port".

Catch this condition and stick with the initial "internal"
classification.
This commit is contained in:
Tobias Waldekranz
2025-10-02 14:51:34 +02:00
parent 39b4101d19
commit 94f8d1a700
1 changed files with 6 additions and 0 deletions
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board/common/rootfs/usr/libexec/infix/init.d/20-nameif
+6
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@@ -34,6 +34,12 @@ ports=$(devlink -j port | jq -r '.port[]
| select(.flavour == "physical")
| .netdev')
for iface in $ports; do
# On systems with multiple switch trees, a port may be _both_
# a physical port, registered with devlink, _and_ a DSA
# port. In those cases, hold on to our initial "internal"
# classification.
[ $(ip -j link show dev "$iface" | jq -r '.[0].group') = internal ] && continue
ip link set "$iface" group port
done