Extend the test_tc_redirect test and add a small test that exercises the new
redirect_peer() helper for the IPv4 and IPv6 case.
Signed-off-by: Daniel Borkmann <dan...@iogearbox.net>
---
.../selftests/bpf/progs/test_tc_peer.c | 45 +++++++++++++++++++
.../testing/selftests/bpf/test_tc_redirect.sh | 25 +++++++----
2 files changed, 61 insertions(+), 9 deletions(-)
create mode 100644 tools/testing/selftests/bpf/progs/test_tc_peer.c
diff --git a/tools/testing/selftests/bpf/progs/test_tc_peer.c
b/tools/testing/selftests/bpf/progs/test_tc_peer.c
new file mode 100644
index 000000000000..fc84a7685aa2
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/test_tc_peer.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <linux/bpf.h>
+#include <linux/stddef.h>
+#include <linux/pkt_cls.h>
+
+#include <bpf/bpf_helpers.h>
+
+enum {
+ dev_src,
+ dev_dst,
+};
+
+struct bpf_map_def SEC("maps") ifindex_map = {
+ .type = BPF_MAP_TYPE_ARRAY,
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .max_entries = 2,
+};
+
+static __always_inline int get_dev_ifindex(int which)
+{
+ int *ifindex = bpf_map_lookup_elem(&ifindex_map, &which);
+
+ return ifindex ? *ifindex : 0;
+}
+
+SEC("chk_egress") int tc_chk(struct __sk_buff *skb)
+{
+ return TC_ACT_SHOT;
+}
+
+SEC("dst_ingress") int tc_dst(struct __sk_buff *skb)
+{
+ return bpf_redirect_peer(get_dev_ifindex(dev_src), 0);
+}
+
+SEC("src_ingress") int tc_src(struct __sk_buff *skb)
+{
+ return bpf_redirect_peer(get_dev_ifindex(dev_dst), 0);
+}
+
+char __license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/test_tc_redirect.sh
b/tools/testing/selftests/bpf/test_tc_redirect.sh
index 6ad441405132..6d7482562140 100755
--- a/tools/testing/selftests/bpf/test_tc_redirect.sh
+++ b/tools/testing/selftests/bpf/test_tc_redirect.sh
@@ -4,9 +4,10 @@
# This test sets up 3 netns (src <-> fwd <-> dst). There is no direct veth link
# between src and dst. The netns fwd has veth links to each src and dst. The
# client is in src and server in dst. The test installs a TC BPF program to
each
-# host facing veth in fwd which calls into bpf_redirect_peer() to perform the
-# neigh addr population and redirect; it also installs a dropper prog on the
-# egress side to drop skbs if neigh addrs were not populated.
+# host facing veth in fwd which calls into i) bpf_redirect_neigh() to perform
the
+# neigh addr population and redirect or ii) bpf_redirect_peer() for namespace
+# switch from ingress side; it also installs a checker prog on the egress side
+# to drop unexpected traffic.
if [[ $EUID -ne 0 ]]; then
echo "This script must be run as root"
@@ -166,15 +167,17 @@ hex_mem_str()
perl -e 'print join(" ", unpack("(H2)8", pack("L", @ARGV)))' $1
}
-netns_setup_neigh()
+netns_setup_bpf()
{
+ local obj=$1
+
ip netns exec ${NS_FWD} tc qdisc add dev veth_src_fwd clsact
- ip netns exec ${NS_FWD} tc filter add dev veth_src_fwd ingress bpf da
obj test_tc_neigh.o sec src_ingress
- ip netns exec ${NS_FWD} tc filter add dev veth_src_fwd egress bpf da
obj test_tc_neigh.o sec chk_egress
+ ip netns exec ${NS_FWD} tc filter add dev veth_src_fwd ingress bpf da
obj $obj sec src_ingress
+ ip netns exec ${NS_FWD} tc filter add dev veth_src_fwd egress bpf da
obj $obj sec chk_egress
ip netns exec ${NS_FWD} tc qdisc add dev veth_dst_fwd clsact
- ip netns exec ${NS_FWD} tc filter add dev veth_dst_fwd ingress bpf da
obj test_tc_neigh.o sec dst_ingress
- ip netns exec ${NS_FWD} tc filter add dev veth_dst_fwd egress bpf da
obj test_tc_neigh.o sec chk_egress
+ ip netns exec ${NS_FWD} tc filter add dev veth_dst_fwd ingress bpf da
obj $obj sec dst_ingress
+ ip netns exec ${NS_FWD} tc filter add dev veth_dst_fwd egress bpf da
obj $obj sec chk_egress
veth_src=$(ip netns exec ${NS_FWD} cat
/sys/class/net/veth_src_fwd/ifindex)
veth_dst=$(ip netns exec ${NS_FWD} cat
/sys/class/net/veth_dst_fwd/ifindex)
@@ -193,5 +196,9 @@ trap netns_cleanup EXIT
set -e
netns_setup
-netns_setup_neigh
+netns_setup_bpf test_tc_neigh.o
+netns_test_connectivity
+netns_cleanup
+netns_setup
+netns_setup_bpf test_tc_peer.o
netns_test_connectivity
--
2.17.1
