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From: Jiri Benc <jbenc@redhat.com>
To: bpf@vger.kernel.org, netdev@vger.kernel.org
Cc: Petar Penkov <ppenkov@google.com>
Subject: [PATCH bpf 1/2] selftests/bpf: set rp_filter in test_flow_dissector
Date: Tue,  8 Oct 2019 15:10:44 +0200
Message-ID: <513a298f53e99561d2f70b2e60e2858ea6cda754.1570539863.git.jbenc@redhat.com> (raw)
In-Reply-To: <cover.1570539863.git.jbenc@redhat.com>

Many distributions enable rp_filter. However, the flow dissector test
generates packets that have 1.1.1.1 set as (inner) source address without
this address being reachable. This causes the selftest to fail.

The selftests should not assume a particular initial configuration. Switch
off rp_filter.

Fixes: 50b3ed57dee9 ("selftests/bpf: test bpf flow dissection")
Cc: Petar Penkov <ppenkov@google.com>
Signed-off-by: Jiri Benc <jbenc@redhat.com>
---
 tools/testing/selftests/bpf/test_flow_dissector.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/testing/selftests/bpf/test_flow_dissector.sh b/tools/testing/selftests/bpf/test_flow_dissector.sh
index d23d4da66b83..e2d06191bd35 100755
--- a/tools/testing/selftests/bpf/test_flow_dissector.sh
+++ b/tools/testing/selftests/bpf/test_flow_dissector.sh
@@ -63,6 +63,9 @@ fi
 
 # Setup
 tc qdisc add dev lo ingress
+echo 0 > /proc/sys/net/ipv4/conf/default/rp_filter
+echo 0 > /proc/sys/net/ipv4/conf/all/rp_filter
+echo 0 > /proc/sys/net/ipv4/conf/lo/rp_filter
 
 echo "Testing IPv4..."
 # Drops all IP/UDP packets coming from port 9
-- 
2.18.1


  reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-08 13:10 [PATCH bpf 0/2] selftests/bpf: fix false failures Jiri Benc
2019-10-08 13:10 ` Jiri Benc [this message]
2019-10-08 16:45   ` [PATCH bpf 1/2] selftests/bpf: set rp_filter in test_flow_dissector Petar Penkov
2019-10-08 13:10 ` [PATCH bpf 2/2] selftests/bpf: more compatible nc options in test_lwt_ip_encap Jiri Benc
2019-10-08 22:03 ` [PATCH bpf 0/2] selftests/bpf: fix false failures Daniel Borkmann

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