Hi, I'm back now and catching up with a lot of things. A few people have mentioned to me that wg-quick(8), a bash script that makes a bunch of iproute2 invocations, appears to be broken on 5.1. I've distilled the behavior change down to the following.
Behavior on 5.0: + ip link add wg0 type dummy + ip address add 192.168.50.2/24 dev wg0 + ip link set mtu 1420 up dev wg0 + ip route get 192.168.50.0/24 broadcast 192.168.50.0 dev wg0 src 192.168.50.2 uid 0 cache <local,brd> Behavior on 5.1: + ip link add wg0 type dummy + ip address add 192.168.50.2/24 dev wg0 + ip link set mtu 1420 up dev wg0 + ip route get 192.168.50.0/24 RTNETLINK answers: Invalid argument Upon investigating, I'm not sure that `ip route get` was ever suitable for getting details on a particular route. So I'll adjust the wg-quick(8) code accordingly. But FYI, this is unexpected userspace breakage. Jason On Sat, Mar 23, 2019 at 2:00 PM <emersonbern...@tutanota.com> wrote: > > After upgrading iproute2 from 4.20 to 5.0 the following error occurs: > > $ ip route show table default > Error: ipv4: FIB table does not exist. > Dump terminated > > The command works for all tables other than 'default' one. It seems related > to this commit[1] > > I also saw "Error: ipv4: MR table does not exist." message in logs related to > this commit[2] but don't know exact command to reproduce it. I've seen some > fixups[3] for mentioned commits and wonder it they weren't complete. > > I reproduced it on Linux 4.20.17 and 5.0.3. > > [1] > https://github.com/torvalds/linux/commit/18a8021a7be3207686851208f91a2f105b2d4703#diff-04a14e4f51765994f87e7e5e7681d0e1R861 > > <https://github.com/torvalds/linux/commit/18a8021a7be3207686851208f91a2f105b2d4703#diff-04a14e4f51765994f87e7e5e7681d0e1R861> > > [2] > https://github.com/torvalds/linux/commit/cb167893f41e21e6bd283d78e53489289dc0592d#diff-9900db808ce5e5dd24a7341cd8ed1609R2545 > > <https://github.com/torvalds/linux/commit/cb167893f41e21e6bd283d78e53489289dc0592d#diff-9900db808ce5e5dd24a7341cd8ed1609R2545> > > [3] > https://github.com/torvalds/linux/commit/73155879b3c1ac3ace35208a54a3a160ec520bef
