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selftests: pmtu: Make list_flush_ipv6_exception test more demanding

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Instead of just listing and flushing two cached exceptions, create
a relatively big number of them, and count how many are listed. Single
netlink dump messages contain approximately 25 entries each, and this
way we can make sure the partial dump tracking mechanism is working
properly.

While at it, also ensure that no cached routes can be listed after
flush, and remove 'sleep 1' calls, they are not actually needed.

v7: No changes

v6:
  - Merge this patch into series including fix, as it's also targeted
    for net-next. No actual changes

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefano Brivio 2019-06-21 17:45:30 +02:00 committed by David S. Miller
parent de755a8513
commit b964641e99
1 changed files with 14 additions and 8 deletions
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22
tools/testing/selftests/net/pmtu.sh
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@ -1274,7 +1274,7 @@ test_list_flush_ipv6_exception() {
"${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \
"${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2
dst1="${prefix6}:${b_r1}::1"
dst_prefix1="${prefix6}:${b_r1}::"
dst2="${prefix6}:${b_r2}::1"
# Set up initial MTU values
@ -1290,20 +1290,26 @@ test_list_flush_ipv6_exception() {
fail=0
# Create route exceptions
run_cmd ${ns_a} ${ping6} -q -M want -i 0.1 -w 1 -s 1800 ${dst1}
run_cmd ${ns_a} ${ping6} -q -M want -i 0.1 -w 1 -s 1800 ${dst2}
# Add 100 addresses for veth endpoint on B reached by default A route
for i in $(seq 100 199); do
run_cmd ${ns_b} ip addr add "${dst_prefix1}${i}" dev veth_B-R1
done
if [ "$(${ns_a} ip -6 route list cache | wc -l)" -ne 2 ]; then
# Create 100 cached route exceptions for path via R1, one via R2
for i in $(seq 100 199); do
run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s 1800 "${dst_prefix1}${i}"
done
run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s 1800 "${dst2}"
if [ "$(${ns_a} ip -6 route list cache | wc -l)" -ne 101 ]; then
err " can't list cached exceptions"
fail=1
fi
run_cmd ${ns_a} ip -6 route flush cache
sleep 1
pmtu1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})"
pmtu1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst_prefix1}100")"
pmtu2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})"
if [ -n "${pmtu1}" ] || [ -n "${pmtu2}" ]; then
if [ -n "${pmtu1}" ] || [ -n "${pmtu2}" ] || \
[ -n "$(${ns_a} ip -6 route list cache)" ]; then
err " can't flush cached exceptions"
fail=1
fi