fw4: skip not existing netdev names in flowtable device list

In case interface configurations are present which refer to not existing
network devices, such device names might end up in the flowtable list,
leading to `No such file or directory` errors when attempting to load
the resulting ruleset.

Solve this issue by testing for each netdev name whether it refers to
an existing device.

Fixes: e009588 ("fw4: do not add physical devices for soft offload")
Signed-off-by: Jo-Philipp Wich <jo@mein.io>

diff --git a/root/usr/share/ucode/fw4.uc b/root/usr/share/ucode/fw4.uc
index ffea2ebdd7b5466eceba8ba51b9759b4ca165646..2d77146809585edcb91bbf770fb1fad51f7be48b 100644 (file)
--- a/root/usr/share/ucode/fw4.uc
+++ b/root/usr/share/ucode/fw4.uc
@@ -547,7 +547,9 @@ return {
                        devices = [];
 
                        for (let zone in this.zones())
-                               push(devices, ...zone.related_physdevs);
+                               for (let device in zone.related_physdevs)
+                                       if (fs.access(`/sys/class/net/${device}`))
+                                               push(devices, device);
 
                        devices = sort(uniq(devices));
                }