[solved] virbr0 not being init'd correctly after update/…

[equaeghe]

Hi,


I have qemu/libvirt setuo to run Windows in a virtual machine the few times I need it. This worked fine. Yesterday, updates for qemu and libvirt were installed. This morning I started the virtual machine (using irt-manager) and that worked. Then after a failed resume from suspend-to-ram, it does not work anymore. I get the following error from virtqemud:

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/usr/libexec/qemu-bridge-helper --use-vnet --br=virbr0 --fd=30: failed to communicate with bridge helper: stderr=failed to get mtu of bridge `virbr0': No such device
: Transport endpoint is not connected

Looking back at what happened in the logs, I find that the virtual network interface virbr0 seems to have a problem:

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kernel: bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
NetworkManager[559]: <info>  [1739170746.9916] manager: (virbr0): new Bridge device (/org/freedesktop/NetworkManager/Devices/9)
iwd[561]: udev interface=virbr0 ifindex=7
…
virtnetworkd[716]: libvirt version: 10.10.0
virtnetworkd[716]: hostname: TUE023621
virtnetworkd[716]: internal error: Failed to apply firewall command '/sbin/tc filter add dev virbr0 prio 2 protocol ip parent 1: u32 match ip dport 68 ffff action csum ip and udp': Error: Failed to load TC action module.
                   We have an error talking to the kernel
…
virtnetworkd[716]: Cannot get interface flags on 'virbr0': No such device
…
virtnetworkd[716]: error destroying network device virbr0: No such device

The first message from the kernel may be very relevant, but is not immediately actionable for me (I learned the minimum I needed to get my virtual machine running, when I set it up). Perhaps I'm missing some kernel module that has become required now?

If there is anyone who has any suggestions on how to fix this issue or diagnose it further, I would be grateful hearing from you.


Best,

Erik

[grknight]

Seems very similar to [SOLVED] QEMU-Virt Manager Networking

[equaeghe]

Seems very similar to [SOLVED] QEMU-Virt Manager Networking

Thanks. That gave me the push to investigate the missing modules idea. It turns out NET_ACT_CSUM should have been set (I did so as a module).

[equaeghe]

Created Bug 949588.