[PATCHv2 net-next 08/14] selftests/net: convert icmp_redirect.sh to run it in unique namespace

Hangbin Liu
2023-11-30T04:01:54Z

# ./icmp_redirect.sh

###########################################################################
Legacy routing
###########################################################################

TEST: IPv4: redirect exception [ OK ]

...

TEST: IPv4: mtu exception plus redirect [ OK ]
TEST: IPv6: mtu exception plus redirect [ OK ]

Tests passed: 40
Tests failed: 0
Tests xfailed: 0

Acked-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
---
tools/testing/selftests/net/icmp_redirect.sh | 182 +++++++++----------
1 file changed, 88 insertions(+), 94 deletions(-)

diff --git a/tools/testing/selftests/net/icmp_redirect.sh b/tools/testing/selftests/net/icmp_redirect.sh
index 7b9d6e31b8e7..d6f0e449c029 100755
--- a/tools/testing/selftests/net/icmp_redirect.sh
+++ b/tools/testing/selftests/net/icmp_redirect.sh
@@ -19,6 +19,7 @@
# Route on r1 changed to go to r2 via eth0. This causes a redirect to be sent
# from r1 to h1 telling h1 to use r2 when talking to h2.

+source lib.sh
VERBOSE=0
PAUSE_ON_FAIL=no

@@ -140,11 +141,7 @@ get_linklocal()

cleanup()
{
- local ns
-
- for ns in h1 h2 r1 r2; do
- ip netns del $ns 2>/dev/null
- done
+ cleanup_ns $h1 $h2 $r1 $r2
}

create_vrf()
@@ -171,102 +168,99 @@ setup()

#
# create nodes as namespaces
- #
- for ns in h1 h2 r1 r2; do
- ip netns add $ns
- ip -netns $ns li set lo up
-
- case "${ns}" in
- h[12]) ip netns exec $ns sysctl -q -w net.ipv4.conf.all.accept_redirects=1
- ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=0
- ip netns exec $ns sysctl -q -w net.ipv6.conf.all.accept_redirects=1
- ip netns exec $ns sysctl -q -w net.ipv6.conf.all.keep_addr_on_down=1
- ;;
- r[12]) ip netns exec $ns sysctl -q -w net.ipv4.ip_forward=1
- ip netns exec $ns sysctl -q -w net.ipv4.conf.all.send_redirects=1
- ip netns exec $ns sysctl -q -w net.ipv4.conf.default.rp_filter=0
- ip netns exec $ns sysctl -q -w net.ipv4.conf.all.rp_filter=0
-
- ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=1
- ip netns exec $ns sysctl -q -w net.ipv6.route.mtu_expires=10
- esac
+ setup_ns h1 h2 r1 r2
+ for ns in $h1 $h2 $r1 $r2; do
+ if echo $ns | grep -q h[12]-; then
+ ip netns exec $ns sysctl -q -w net.ipv4.conf.all.accept_redirects=1
+ ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=0
+ ip netns exec $ns sysctl -q -w net.ipv6.conf.all.accept_redirects=1
+ ip netns exec $ns sysctl -q -w net.ipv6.conf.all.keep_addr_on_down=1
+ else
+ ip netns exec $ns sysctl -q -w net.ipv4.ip_forward=1
+ ip netns exec $ns sysctl -q -w net.ipv4.conf.all.send_redirects=1
+ ip netns exec $ns sysctl -q -w net.ipv4.conf.default.rp_filter=0
+ ip netns exec $ns sysctl -q -w net.ipv4.conf.all.rp_filter=0
+
+ ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=1
+ ip netns exec $ns sysctl -q -w net.ipv6.route.mtu_expires=10
+ fi
done

#
# create interconnects
#
- ip -netns h1 li add eth0 type veth peer name r1h1
- ip -netns h1 li set r1h1 netns r1 name eth0 up
+ ip -netns $h1 li add eth0 type veth peer name r1h1
+ ip -netns $h1 li set r1h1 netns $r1 name eth0 up

- ip -netns h1 li add eth1 type veth peer name r2h1
- ip -netns h1 li set r2h1 netns r2 name eth0 up
+ ip -netns $h1 li add eth1 type veth peer name r2h1
+ ip -netns $h1 li set r2h1 netns $r2 name eth0 up

- ip -netns h2 li add eth0 type veth peer name r2h2
- ip -netns h2 li set eth0 up
- ip -netns h2 li set r2h2 netns r2 name eth2 up
+ ip -netns $h2 li add eth0 type veth peer name r2h2
+ ip -netns $h2 li set eth0 up
+ ip -netns $h2 li set r2h2 netns $r2 name eth2 up

- ip -netns r1 li add eth1 type veth peer name r2r1
- ip -netns r1 li set eth1 up
- ip -netns r1 li set r2r1 netns r2 name eth1 up
+ ip -netns $r1 li add eth1 type veth peer name r2r1
+ ip -netns $r1 li set eth1 up
+ ip -netns $r1 li set r2r1 netns $r2 name eth1 up

#
# h1
#
if [ "${WITH_VRF}" = "yes" ]; then
- create_vrf "h1"
+ create_vrf "$h1"
H1_VRF_ARG="vrf ${VRF}"
H1_PING_ARG="-I ${VRF}"
else
H1_VRF_ARG=
H1_PING_ARG=
fi
- ip -netns h1 li add br0 type bridge
+ ip -netns $h1 li add br0 type bridge
if [ "${WITH_VRF}" = "yes" ]; then
- ip -netns h1 li set br0 vrf ${VRF} up
+ ip -netns $h1 li set br0 vrf ${VRF} up
else
- ip -netns h1 li set br0 up
+ ip -netns $h1 li set br0 up
fi
- ip -netns h1 addr add dev br0 ${H1_N1_IP}/24
- ip -netns h1 -6 addr add dev br0 ${H1_N1_IP6}/64 nodad
- ip -netns h1 li set eth0 master br0 up
- ip -netns h1 li set eth1 master br0 up
+ ip -netns $h1 addr add dev br0 ${H1_N1_IP}/24
+ ip -netns $h1 -6 addr add dev br0 ${H1_N1_IP6}/64 nodad
+ ip -netns $h1 li set eth0 master br0 up
+ ip -netns $h1 li set eth1 master br0 up

#
# h2
#
- ip -netns h2 addr add dev eth0 ${H2_N2_IP}/24
- ip -netns h2 ro add default via ${R2_N2_IP} dev eth0
- ip -netns h2 -6 addr add dev eth0 ${H2_N2_IP6}/64 nodad
- ip -netns h2 -6 ro add default via ${R2_N2_IP6} dev eth0
+ ip -netns $h2 addr add dev eth0 ${H2_N2_IP}/24
+ ip -netns $h2 ro add default via ${R2_N2_IP} dev eth0
+ ip -netns $h2 -6 addr add dev eth0 ${H2_N2_IP6}/64 nodad
+ ip -netns $h2 -6 ro add default via ${R2_N2_IP6} dev eth0

#
# r1
#
- ip -netns r1 addr add dev eth0 ${R1_N1_IP}/24
- ip -netns r1 -6 addr add dev eth0 ${R1_N1_IP6}/64 nodad
- ip -netns r1 addr add dev eth1 ${R1_R2_N1_IP}/30
- ip -netns r1 -6 addr add dev eth1 ${R1_R2_N1_IP6}/126 nodad
+ ip -netns $r1 addr add dev eth0 ${R1_N1_IP}/24
+ ip -netns $r1 -6 addr add dev eth0 ${R1_N1_IP6}/64 nodad
+ ip -netns $r1 addr add dev eth1 ${R1_R2_N1_IP}/30
+ ip -netns $r1 -6 addr add dev eth1 ${R1_R2_N1_IP6}/126 nodad

#
# r2
#
- ip -netns r2 addr add dev eth0 ${R2_N1_IP}/24
- ip -netns r2 -6 addr add dev eth0 ${R2_N1_IP6}/64 nodad
- ip -netns r2 addr add dev eth1 ${R2_R1_N1_IP}/30
- ip -netns r2 -6 addr add dev eth1 ${R2_R1_N1_IP6}/126 nodad
- ip -netns r2 addr add dev eth2 ${R2_N2_IP}/24
- ip -netns r2 -6 addr add dev eth2 ${R2_N2_IP6}/64 nodad
+ ip -netns $r2 addr add dev eth0 ${R2_N1_IP}/24
+ ip -netns $r2 -6 addr add dev eth0 ${R2_N1_IP6}/64 nodad
+ ip -netns $r2 addr add dev eth1 ${R2_R1_N1_IP}/30
+ ip -netns $r2 -6 addr add dev eth1 ${R2_R1_N1_IP6}/126 nodad
+ ip -netns $r2 addr add dev eth2 ${R2_N2_IP}/24
+ ip -netns $r2 -6 addr add dev eth2 ${R2_N2_IP6}/64 nodad

sleep 2

- R1_LLADDR=$(get_linklocal r1 eth0)
+ R1_LLADDR=$(get_linklocal $r1 eth0)
if [ $? -ne 0 ]; then
echo "Error: Failed to get link-local address of r1's eth0"
exit 1
fi
log_debug "initial gateway is R1's lladdr = ${R1_LLADDR}"

- R2_LLADDR=$(get_linklocal r2 eth0)
+ R2_LLADDR=$(get_linklocal $r2 eth0)
if [ $? -ne 0 ]; then
echo "Error: Failed to get link-local address of r2's eth0"
exit 1
@@ -278,8 +272,8 @@ change_h2_mtu()
{
local mtu=$1

- run_cmd ip -netns h2 li set eth0 mtu ${mtu}
- run_cmd ip -netns r2 li set eth2 mtu ${mtu}
+ run_cmd ip -netns $h2 li set eth0 mtu ${mtu}
+ run_cmd ip -netns $r2 li set eth2 mtu ${mtu}
}

check_exception()
@@ -291,40 +285,40 @@ check_exception()
# From 172.16.1.101: icmp_seq=1 Redirect Host(New nexthop: 172.16.1.102)
if [ "$VERBOSE" = "1" ]; then
echo "Commands to check for exception:"
- run_cmd ip -netns h1 ro get ${H1_VRF_ARG} ${H2_N2_IP}
- run_cmd ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6}
+ run_cmd ip -netns $h1 ro get ${H1_VRF_ARG} ${H2_N2_IP}
+ run_cmd ip -netns $h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6}
fi

if [ -n "${mtu}" ]; then
mtu=" mtu ${mtu}"
fi
if [ "$with_redirect" = "yes" ]; then
- ip -netns h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} | \
+ ip -netns $h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} | \
grep -q "cache <redirected> expires [0-9]*sec${mtu}"
elif [ -n "${mtu}" ]; then
- ip -netns h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} | \
+ ip -netns $h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} | \
grep -q "cache expires [0-9]*sec${mtu}"
else
# want to verify that neither mtu nor redirected appears in
# the route get output. The -v will wipe out the cache line
# if either are set so the last grep -q will not find a match
- ip -netns h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} | \
+ ip -netns $h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} | \
grep -E -v 'mtu|redirected' | grep -q "cache"
fi
log_test $? 0 "IPv4: ${desc}" 0

# No PMTU info for test "redirect" and "mtu exception plus redirect"
if [ "$with_redirect" = "yes" ] && [ "$desc" != "redirect exception plus mtu" ]; then
- ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \
+ ip -netns $h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \
grep -v "mtu" | grep -q "${H2_N2_IP6} .*via ${R2_LLADDR} dev br0"
elif [ -n "${mtu}" ]; then
- ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \
+ ip -netns $h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \
grep -q "${mtu}"
else
# IPv6 is a bit harder. First strip out the match if it
# contains an mtu exception and then look for the first
# gateway - R1's lladdr
- ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \
+ ip -netns $h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \
grep -v "mtu" | grep -q "${R1_LLADDR}"
fi
log_test $? 0 "IPv6: ${desc}" 1
@@ -334,21 +328,21 @@ run_ping()
{
local sz=$1

- run_cmd ip netns exec h1 ping -q -M want -i 0.5 -c 10 -w 2 -s ${sz} ${H1_PING_ARG} ${H2_N2_IP}
- run_cmd ip netns exec h1 ${ping6} -q -M want -i 0.5 -c 10 -w 2 -s ${sz} ${H1_PING_ARG} ${H2_N2_IP6}
+ run_cmd ip netns exec $h1 ping -q -M want -i 0.5 -c 10 -w 2 -s ${sz} ${H1_PING_ARG} ${H2_N2_IP}
+ run_cmd ip netns exec $h1 ${ping6} -q -M want -i 0.5 -c 10 -w 2 -s ${sz} ${H1_PING_ARG} ${H2_N2_IP6}
}

replace_route_new()
{
# r1 to h2 via r2 and eth0
- run_cmd ip -netns r1 nexthop replace id 1 via ${R2_N1_IP} dev eth0
- run_cmd ip -netns r1 nexthop replace id 2 via ${R2_LLADDR} dev eth0
+ run_cmd ip -netns $r1 nexthop replace id 1 via ${R2_N1_IP} dev eth0
+ run_cmd ip -netns $r1 nexthop replace id 2 via ${R2_LLADDR} dev eth0
}

reset_route_new()
{
- run_cmd ip -netns r1 nexthop flush
- run_cmd ip -netns h1 nexthop flush
+ run_cmd ip -netns $r1 nexthop flush
+ run_cmd ip -netns $h1 nexthop flush

initial_route_new
}
@@ -356,34 +350,34 @@ reset_route_new()
initial_route_new()
{
# r1 to h2 via r2 and eth1
- run_cmd ip -netns r1 nexthop add id 1 via ${R2_R1_N1_IP} dev eth1
- run_cmd ip -netns r1 ro add ${H2_N2} nhid 1
+ run_cmd ip -netns $r1 nexthop add id 1 via ${R2_R1_N1_IP} dev eth1
+ run_cmd ip -netns $r1 ro add ${H2_N2} nhid 1

- run_cmd ip -netns r1 nexthop add id 2 via ${R2_R1_N1_IP6} dev eth1
- run_cmd ip -netns r1 -6 ro add ${H2_N2_6} nhid 2
+ run_cmd ip -netns $r1 nexthop add id 2 via ${R2_R1_N1_IP6} dev eth1
+ run_cmd ip -netns $r1 -6 ro add ${H2_N2_6} nhid 2

# h1 to h2 via r1
- run_cmd ip -netns h1 nexthop add id 1 via ${R1_N1_IP} dev br0
- run_cmd ip -netns h1 ro add ${H1_VRF_ARG} ${H2_N2} nhid 1
+ run_cmd ip -netns $h1 nexthop add id 1 via ${R1_N1_IP} dev br0
+ run_cmd ip -netns $h1 ro add ${H1_VRF_ARG} ${H2_N2} nhid 1

- run_cmd ip -netns h1 nexthop add id 2 via ${R1_LLADDR} dev br0
- run_cmd ip -netns h1 -6 ro add ${H1_VRF_ARG} ${H2_N2_6} nhid 2
+ run_cmd ip -netns $h1 nexthop add id 2 via ${R1_LLADDR} dev br0
+ run_cmd ip -netns $h1 -6 ro add ${H1_VRF_ARG} ${H2_N2_6} nhid 2
}

replace_route_legacy()
{
# r1 to h2 via r2 and eth0
- run_cmd ip -netns r1 ro replace ${H2_N2} via ${R2_N1_IP} dev eth0
- run_cmd ip -netns r1 -6 ro replace ${H2_N2_6} via ${R2_LLADDR} dev eth0
+ run_cmd ip -netns $r1 ro replace ${H2_N2} via ${R2_N1_IP} dev eth0
+ run_cmd ip -netns $r1 -6 ro replace ${H2_N2_6} via ${R2_LLADDR} dev eth0
}

reset_route_legacy()
{
- run_cmd ip -netns r1 ro del ${H2_N2}
- run_cmd ip -netns r1 -6 ro del ${H2_N2_6}
+ run_cmd ip -netns $r1 ro del ${H2_N2}
+ run_cmd ip -netns $r1 -6 ro del ${H2_N2_6}

- run_cmd ip -netns h1 ro del ${H1_VRF_ARG} ${H2_N2}
- run_cmd ip -netns h1 -6 ro del ${H1_VRF_ARG} ${H2_N2_6}
+ run_cmd ip -netns $h1 ro del ${H1_VRF_ARG} ${H2_N2}
+ run_cmd ip -netns $h1 -6 ro del ${H1_VRF_ARG} ${H2_N2_6}

initial_route_legacy
}
@@ -391,22 +385,22 @@ reset_route_legacy()
initial_route_legacy()
{
# r1 to h2 via r2 and eth1
- run_cmd ip -netns r1 ro add ${H2_N2} via ${R2_R1_N1_IP} dev eth1
- run_cmd ip -netns r1 -6 ro add ${H2_N2_6} via ${R2_R1_N1_IP6} dev eth1
+ run_cmd ip -netns $r1 ro add ${H2_N2} via ${R2_R1_N1_IP} dev eth1
+ run_cmd ip -netns $r1 -6 ro add ${H2_N2_6} via ${R2_R1_N1_IP6} dev eth1

# h1 to h2 via r1
# - IPv6 redirect only works if gateway is the LLA
- run_cmd ip -netns h1 ro add ${H1_VRF_ARG} ${H2_N2} via ${R1_N1_IP} dev br0
- run_cmd ip -netns h1 -6 ro add ${H1_VRF_ARG} ${H2_N2_6} via ${R1_LLADDR} dev br0
+ run_cmd ip -netns $h1 ro add ${H1_VRF_ARG} ${H2_N2} via ${R1_N1_IP} dev br0
+ run_cmd ip -netns $h1 -6 ro add ${H1_VRF_ARG} ${H2_N2_6} via ${R1_LLADDR} dev br0
}

check_connectivity()
{
local rc

- run_cmd ip netns exec h1 ping -c1 -w1 ${H1_PING_ARG} ${H2_N2_IP}
+ run_cmd ip netns exec $h1 ping -c1 -w1 ${H1_PING_ARG} ${H2_N2_IP}
rc=$?
- run_cmd ip netns exec h1 ${ping6} -c1 -w1 ${H1_PING_ARG} ${H2_N2_IP6}
+ run_cmd ip netns exec $h1 ${ping6} -c1 -w1 ${H1_PING_ARG} ${H2_N2_IP6}
[ $? -ne 0 ] && rc=$?

return $rc
--
2.41.0