> On 28 Aug 2021, at 15:23, Luiz Amaral <[email protected]> wrote: > > Hello guys, Hi Luiz,
> > After upgrading one of my hosts from FreeBSD 12.2 to FreeBSD 13.0, I > started noticing a problem when exporting routes to the KRT. Unfortunately, there were a number of issues in 13.0 w.r.t rtsock handling. I’d suggest considering updating to 13-STABLE. > > My logs were getting flooded with "kernel: gw sdl_len too small". This > message comes from cleanup_xaddrs_gateway() in sys/net/rtsock.c of > releng/13.0, so I checked with "route monitor" and noticed that the > blackhole routes and one interface route were the ones causing the message. > > got message of size 192 on Sat Aug 28 15:57:32 2021 > RTM_ADD: Add Route: len 192, pid: 2293, seq 3, errno 22, > flags:<UP,BLACKHOLE,PROTO1> > locks: inits: > sockaddrs: <DST,GATEWAY,NETMASK> > 10.0.0.0 link#4 255.0.0.0 > > got message of size 192 on Sat Aug 28 15:57:32 2021 > RTM_ADD: Add Route: len 192, pid: 2293, seq 4, errno 22, flags:<UP,PROTO1> > locks: inits: > sockaddrs: <DST,GATEWAY,NETMASK> > 10.42.10.0 link#5 255.255.255.0 > > In BIRD they look the same as before the upgrade: > > bird> show route all 10.0.0.0/8 > Table master4: > 10.0.0.0/8 blackhole [s_null_4 2021-08-28 15:57:32] ! (200) > Type: static univ > bird> show route all 10.42.10.0/24 > Table master4: > 10.42.10.0/24 unicast [direct1 2021-08-28 16:07:59] ! (240) > dev vlan10 > Type: device univ > > > I then decided to try manually adding a blackhole route using "route add > -net 10.0.0.0/8 -blackhole -proto1 -nostatic", to get as close to what > BIRD was trying to add and noticed that BIRD had a gateway, but "route > add" didn't have one. > > got message of size 184 on Sat Aug 28 16:05:43 2021 > RTM_ADD: Add Route: len 184, pid: 2766, seq 1, errno 0, > flags:<UP,GATEWAY,DONE,BLACKHOLE,PROTO1> > locks: inits: > sockaddrs: <DST,NETMASK> > 10.0.0.0 255.0.0.0 > > I tried commenting out line 324 in sysdep/bsd/krt-sock.c of v2.0.8 to > see if that could fix it and bird was able to insert the blackhole route > (can be seen below), but then bird started dying a couple seconds after > starting up, with no error showing up on the logs. > > got message of size 184 on Sat Aug 28 15:27:33 2021 > RTM_ADD: Add Route: len 184, pid: 46425, seq 2, errno 22, flags:<UP,PROTO1> > locks: inits: > sockaddrs: <DST,NETMASK> > 10.42.10.0 255.255.255.0 > > got message of size 184 on Sat Aug 28 15:27:33 2021 > RTM_ADD: Add Route: len 184, pid: 46425, seq 3, errno 0, > flags:<UP,GATEWAY,DONE,BLACKHOLE,PROTO1> > locks: inits: > sockaddrs: <DST,NETMASK> > 10.0.0.0 255.0.0.0 > > > At this point, I ran out of ideas on what else to try. This is in a > testing environment, so I can easily try things out or provide extra > information. > > Thank you, > Luiz > > >
