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selftests: mptcp: join: skip check if MIB counter not supported

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commit 47867f0a7e831e24e5eab3330667ce9682d50fb1 upstream.

Selftests are supposed to run on any kernels, including the old ones not
supporting all MPTCP features.

One of them is the MPTCP MIB counters introduced in commit fc518953bc
("mptcp: add and use MIB counter infrastructure") and more later. The
MPTCP Join selftest heavily relies on these counters.

If a counter is not supported by the kernel, it is not displayed when
using 'nstat -z'. We can then detect that and skip the verification. A
new helper (get_counter()) has been added to do the required checks and
return an error if the counter is not available.

Note that if we expect to have these features available and if
SELFTESTS_MPTCP_LIB_EXPECT_ALL_FEATURES env var is set to 1, the tests
will be marked as failed instead of skipped.

This new helper also makes sure we get the exact counter we want to
avoid issues we had in the past, e.g. with MPTcpExtRmAddr and
MPTcpExtRmAddrDrop sharing the same prefix. While at it, we uniform the
way we fetch a MIB counter.

Note for the backports: we rarely change these modified blocks so if
there is are conflicts, it is very likely because a counter is not used
in the older kernels and we don't need that chunk.

Link: https://github.com/multipath-tcp/mptcp_net-next/issues/368
Fixes: b08fbf2410 ("selftests: add test-cases for MPTCP MP_JOIN")
Cc: stable@vger.kernel.org
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Matthieu Baerts 2023-06-22 15:59:48 +02:00 committed by Greg Kroah-Hartman
parent e508d9cef8
commit 524a2c0bcf
1 changed files with 44 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
tools/testing/selftests/net/mptcp/mptcp_join.sh
View File

@ -130,6 +130,22 @@ do_ping()
fi
}
# $1: ns ; $2: counter
get_counter()
{
local ns="${1}"
local counter="${2}"
local count
count=$(ip netns exec ${ns} nstat -asz "${counter}" | awk 'NR==1 {next} {print $2}')
if [ -z "${count}" ]; then
mptcp_lib_fail_if_expected_feature "${counter} counter"
return 1
fi
echo "${count}"
}
do_transfer()
{
listener_ns="$1"
@ -291,9 +307,10 @@ chk_join_nr()
local dump_stats
printf "%02u %-36s %s" "$TEST_COUNT" "$msg" "syn"
count=`ip netns exec $ns1 nstat -as | grep MPTcpExtMPJoinSynRx | awk '{print $2}'`
[ -z "$count" ] && count=0
if [ "$count" != "$syn_nr" ]; then
count=$(get_counter ${ns1} "MPTcpExtMPJoinSynRx")
if [ -z "$count" ]; then
echo -n "[skip]"
elif [ "$count" != "$syn_nr" ]; then
echo "[fail] got $count JOIN[s] syn expected $syn_nr"
ret=1
dump_stats=1
@ -302,9 +319,10 @@ chk_join_nr()
fi
echo -n " - synack"
count=`ip netns exec $ns2 nstat -as | grep MPTcpExtMPJoinSynAckRx | awk '{print $2}'`
[ -z "$count" ] && count=0
if [ "$count" != "$syn_ack_nr" ]; then
count=$(get_counter ${ns2} "MPTcpExtMPJoinSynAckRx")
if [ -z "$count" ]; then
echo -n "[skip]"
elif [ "$count" != "$syn_ack_nr" ]; then
echo "[fail] got $count JOIN[s] synack expected $syn_ack_nr"
ret=1
dump_stats=1
@ -313,9 +331,10 @@ chk_join_nr()
fi
echo -n " - ack"
count=`ip netns exec $ns1 nstat -as | grep MPTcpExtMPJoinAckRx | awk '{print $2}'`
[ -z "$count" ] && count=0
if [ "$count" != "$ack_nr" ]; then
count=$(get_counter ${ns1} "MPTcpExtMPJoinAckRx")
if [ -z "$count" ]; then
echo "[skip]"
elif [ "$count" != "$ack_nr" ]; then
echo "[fail] got $count JOIN[s] ack expected $ack_nr"
ret=1
dump_stats=1
@ -338,9 +357,10 @@ chk_add_nr()
local dump_stats
printf "%-39s %s" " " "add"
count=`ip netns exec $ns2 nstat -as | grep MPTcpExtAddAddr | awk '{print $2}'`
[ -z "$count" ] && count=0
if [ "$count" != "$add_nr" ]; then
count=$(get_counter ${ns2} "MPTcpExtAddAddr")
if [ -z "$count" ]; then
echo -n "[skip]"
elif [ "$count" != "$add_nr" ]; then
echo "[fail] got $count ADD_ADDR[s] expected $add_nr"
ret=1
dump_stats=1
@ -349,9 +369,10 @@ chk_add_nr()
fi
echo -n " - echo "
count=`ip netns exec $ns1 nstat -as | grep MPTcpExtEchoAdd | awk '{print $2}'`
[ -z "$count" ] && count=0
if [ "$count" != "$echo_nr" ]; then
count=$(get_counter ${ns1} "MPTcpExtEchoAdd")
if [ -z "$count" ]; then
echo "[skip]"
elif [ "$count" != "$echo_nr" ]; then
echo "[fail] got $count ADD_ADDR echo[s] expected $echo_nr"
ret=1
dump_stats=1
@ -375,9 +396,10 @@ chk_rm_nr()
local dump_stats
printf "%-39s %s" " " "rm "
count=`ip netns exec $ns1 nstat -as | grep MPTcpExtRmAddr | awk '{print $2}'`
[ -z "$count" ] && count=0
if [ "$count" != "$rm_addr_nr" ]; then
count=$(get_counter ${ns1} "MPTcpExtRmAddr")
if [ -z "$count" ]; then
echo -n "[skip]"
elif [ "$count" != "$rm_addr_nr" ]; then
echo "[fail] got $count RM_ADDR[s] expected $rm_addr_nr"
ret=1
dump_stats=1
@ -386,9 +408,10 @@ chk_rm_nr()
fi
echo -n " - sf "
count=`ip netns exec $ns2 nstat -as | grep MPTcpExtRmSubflow | awk '{print $2}'`
[ -z "$count" ] && count=0
if [ "$count" != "$rm_subflow_nr" ]; then
count=$(get_counter ${ns2} "MPTcpExtRmSubflow")
if [ -z "$count" ]; then
echo "[skip]"
elif [ "$count" != "$rm_subflow_nr" ]; then
echo "[fail] got $count RM_SUBFLOW[s] expected $rm_subflow_nr"
ret=1
dump_stats=1