netconf: Ignore internal ifaces (e.g. DSA ports) in factory-config

On some system, certain interfaces are not usable by an end-user. The canonical example of this is the ethernet MAC connected to a switch, i.e. the DSA port. Avoid having these be picked up in the generated factory-config, which would be confusing to a user, by classifying them as "internal" ports to be ignored by confd and friends.
kernelkit · Aug 24, 2023 · 9fcd0c1 · 9fcd0c1
1 parent 2a9d4f3
commit 9fcd0c1
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Showing 3 changed files with 3 additions and 1 deletion.
diff --git a/board/common/rootfs/etc/iproute2/group b/board/common/rootfs/etc/iproute2/group
@@ -1,2 +1,3 @@
 1 port
 2 iface
+3 internal
diff --git a/board/common/rootfs/lib/infix/nameif b/board/common/rootfs/lib/infix/nameif
@@ -25,7 +25,7 @@ for netif in /sys/class/net/*; do
 
 	dsa="dsa$num"
 	logger -k -p user.notice -t "$ident" "Found DSA interface, renaming $iface -> $dsa"
-	ip link set dev "$iface" name $dsa
+	ip link set dev "$iface" name $dsa group internal
 	num=$((num + 1))
 done
 

diff --git a/board/netconf/rootfs/lib/infix/factory/gen-interfaces b/board/netconf/rootfs/lib/infix/factory/gen-interfaces
@@ -18,6 +18,7 @@ EOF
 phys_ifaces=$(ip -d -j link show | jq -r '
 	 .[] |
 	 select(.link_type == "ether") |
+	 select(.group != "internal")  |
 	 select(has("linkinfo") | not) |
 	 .ifname')