diff options
| -rwxr-xr-x | tools/testing/selftests/net/pmtu.sh | 68 |
1 files changed, 67 insertions, 1 deletions
diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh index 89aec2fdf4fa..912b2dc50be3 100755 --- a/tools/testing/selftests/net/pmtu.sh +++ b/tools/testing/selftests/net/pmtu.sh @@ -103,6 +103,15 @@ # and check that configured MTU is used on link creation and changes, and # that MTU is properly calculated instead when MTU is not configured from # userspace +# +# - cleanup_ipv4_exception +# Similar to pmtu_ipv4_vxlan4_exception, but explicitly generate PMTU +# exceptions on multiple CPUs and check that the veth device tear-down +# happens in a timely manner +# +# - cleanup_ipv6_exception +# Same as above, but use IPv6 transport from A to B + # Kselftest framework requirement - SKIP code is 4. ksft_skip=4 @@ -135,7 +144,9 @@ tests=" pmtu_vti6_default_mtu vti6: default MTU assignment pmtu_vti4_link_add_mtu vti4: MTU setting on link creation pmtu_vti6_link_add_mtu vti6: MTU setting on link creation - pmtu_vti6_link_change_mtu vti6: MTU changes on link changes" + pmtu_vti6_link_change_mtu vti6: MTU changes on link changes + cleanup_ipv4_exception ipv4: cleanup of cached exceptions + cleanup_ipv6_exception ipv6: cleanup of cached exceptions" NS_A="ns-$(mktemp -u XXXXXX)" NS_B="ns-$(mktemp -u XXXXXX)" @@ -1006,6 +1017,61 @@ test_pmtu_vti6_link_change_mtu() { return ${fail} } +check_command() { + cmd=${1} + + if ! which ${cmd} > /dev/null 2>&1; then + err " missing required command: '${cmd}'" + return 1 + fi + return 0 +} + +test_cleanup_vxlanX_exception() { + outer="${1}" + encap="vxlan" + ll_mtu=4000 + + check_command taskset || return 2 + cpu_list=$(grep -m 2 processor /proc/cpuinfo | cut -d ' ' -f 2) + + setup namespaces routing ${encap}${outer} || return 2 + trace "${ns_a}" ${encap}_a "${ns_b}" ${encap}_b \ + "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ + "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B + + # Create route exception by exceeding link layer MTU + mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) + mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) + mtu "${ns_b}" veth_B-R1 ${ll_mtu} + mtu "${ns_r1}" veth_R1-B ${ll_mtu} + + mtu "${ns_a}" ${encap}_a $((${ll_mtu} + 1000)) + mtu "${ns_b}" ${encap}_b $((${ll_mtu} + 1000)) + + # Fill exception cache for multiple CPUs (2) + # we can always use inner IPv4 for that + for cpu in ${cpu_list}; do + taskset --cpu-list ${cpu} ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${tunnel4_b_addr} > /dev/null + done + + ${ns_a} ip link del dev veth_A-R1 & + iplink_pid=$! + sleep 1 + if [ "$(cat /proc/${iplink_pid}/cmdline 2>/dev/null | tr -d '\0')" = "iplinkdeldevveth_A-R1" ]; then + err " can't delete veth device in a timely manner, PMTU dst likely leaked" + return 1 + fi +} + +test_cleanup_ipv6_exception() { + test_cleanup_vxlanX_exception 6 +} + +test_cleanup_ipv4_exception() { + test_cleanup_vxlanX_exception 4 +} + usage() { echo echo "$0 [OPTIONS] [TEST]..." |