Re: [PATCH] selftests: bpf: config: add config fragments

On Tue, 26 Jun 2018 at 23:27, William Tu [off-list ref] wrote:

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--- ::11 ping statistics ---

5 packets transmitted, 3 packets received, 40% packet loss
round-trip min/avg/max = 0.139/1.857/5.293 ms
+ ip netns exec at_ns0 ping -c 3 -w 10 -q 10.1.1.200
PING 10.1.1.200 (10.1.1.200): 56 data bytes

--- 10.1.1.200 ping statistics ---

3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 0.214/0.256/0.305 ms
+ ping -c 3 -w 10 -q 10.1.1.100
PING 10.1.1.100 (10.1.1.100): 56 data bytes

--- 10.1.1.100 ping statistics ---

3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 0.210/0.211/0.213 ms
+ check_err 0
+ '[' 0 -eq 0 ']'
+ ret=0

So looks like the ipv4 over ipv6 gre passes.

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+ ip netns exec at_ns0 ping6 -c 3 -w 10 -q fc80::200
PING fc80::200 (fc80::200): 56 data bytes

--- fc80::200 ping statistics ---

10 packets transmitted, 0 packets received, 100% packet loss

`
but the ipv6 over ipv6 gre fails.
Do you have any firewall rules that block this traffic?
or if possible, the packet might get dropped at function ip6gre_xmit_ipv6
can you print the return value of this function?

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+ check_err 1
+ '[' 0 -eq 0 ']'
+ ret=1
+ ip -s link show ip6gretap11
19: ip6gretap11@NONE: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1434 qdisc
pfifo_fast state UNKNOWN mode DEFAULT group default qlen 1000
    link/ether de:d2:0c:53:80:8c brd ff:ff:ff:ff:ff:ff
    RX: bytes  packets  errors  dropped overrun mcast
    2096       25       0       0       0       0
    TX: bytes  packets  errors  dropped carrier collsns
    5324       36       5       5       0       0

So there are 5 errors at TX.

and today when I tried it on next-20180620 I saw 8 errors at TX.

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I couldn't reproduce in my local machine using 4.17-rc6.
How do I checkin the "next-20180613" source code?

You can find the source code here [1], and I would look in the latest tag that I
said that I was able to reproduce it on above.

Cheers,
Anders
[1] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/

Hi Anders,

Hi William,

I'm still not able to reproduce the issue on next-20180620.

I'm not able to reproduce it either, and I tried on todays tag as well
next-20180703.

The only test that is failing in bpf/test_tunnel.sh:

FAIL: xfrm tunnel

Cheers,
Anders