W dniu 08.11.2018 o 17:32, David Ahern pisze:
On 11/8/18 9:27 AM, Paweł Staszewski wrote:
What hardware is this?
mellanox connectx 4
ethtool -i enp175s0f0
driver: mlx5_core
version: 5.0-0
firmware-version: 12.21.1000 (SM_2001000001033)
expansion-rom-version:
bus-info: 0000:af:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: yes
ethtool -i enp175s0f1
driver: mlx5_core
version: 5.0-0
firmware-version: 12.21.1000 (SM_2001000001033)
expansion-rom-version:
bus-info: 0000:af:00.1
supports-statistics: yes
supports-test: yes
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: yes
Start with:
echo 1 > /sys/kernel/debug/tracing/events/xdp/enable
cat /sys/kernel/debug/tracing/trace_pipe
cat /sys/kernel/debug/tracing/trace_pipe
<idle>-0 [045] ..s. 68469.467752: xdp_devmap_xmit:
ndo_xdp_xmit map_id=32 map_index=5 action=REDIRECT sent=0 drops=1
from_ifindex=4 to_ifindex=5 err=-6
FIB lookup is good, the redirect is happening, but the mlx5 driver does
not like it.
I think the -6 is coming from the mlx5 driver and the packet is getting
dropped. Perhaps this check in mlx5e_xdp_xmit:
if (unlikely(sq_num >= priv->channels.num))
return -ENXIO;
I removed that part and recompiled - but after running now xdp_fwd i
have kernel pamic :)
swapper 0 [045] 68493.746274: fib:fib_table_lookup: table 254 oif
0 iif 6 proto 1 192.168.22.237/0 -> 172.16.0.2/0 tos 0 scope 0 flags 0
==> dev vlan1740 gw 0.0.0.0 src 172.16.0.1 err 0
7fff818c13b5 fib_table_lookup ([kernel.kallsyms])
swapper 0 [045] 68494.770287: fib:fib_table_lookup: table 254 oif
0 iif 6 proto 1 192.168.22.237/0 -> 172.16.0.2/0 tos 0 scope 0 flags 0
==> dev vlan1740 gw 0.0.0.0 src 172.16.0.1 err 0
7fff818c13b5 fib_table_lookup ([kernel.kallsyms])
swapper 0 [045] 68495.794304: fib:fib_table_lookup: table 254 oif
0 iif 6 proto 1 192.168.22.237/0 -> 172.16.0.2/0 tos 0 scope 0 flags 0
==> dev vlan1740 gw 0.0.0.0 src 172.16.0.1 err 0
7fff818c13b5 fib_table_lookup ([kernel.kallsyms])
swapper 0 [045] 68496.818308: fib:fib_table_lookup: table 254 oif
0 iif 6 proto 1 192.168.22.237/0 -> 172.16.0.2/0 tos 0 scope 0 flags 0
==> dev vlan1740 gw 0.0.0.0 src 172.16.0.1 err 0
7fff818c13b5 fib_table_lookup ([kernel.kallsyms])
swapper 0 [045] 68497.842313: fib:fib_table_lookup: table 254 oif
0 iif 6 proto 1 192.168.22.237/0 -> 172.16.0.2/0 tos 0 scope 0 flags 0
==> dev vlan1740 gw 0.0.0.0 src 172.16.0.1 err 0
7fff818c13b5 fib_table_lookup ([kernel.kallsyms])
