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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184#!/bin/bash# SPDX-License-Identifier: GPL-2.0## This test is for checking the psample module. It makes use of netdevsim# which periodically generates "sampled" packets.
lib_dir=$(dirname $0)/../../../net/forwarding
ALL_TESTS=" psample_enable_test psample_group_num_test psample_md_test"NETDEVSIM_PATH=/sys/bus/netdevsim/DEV_ADDR=1337DEV=netdevsim${DEV_ADDR}SYSFS_NET_DIR=/sys/bus/netdevsim/devices/$DEV/net/PSAMPLE_DIR=/sys/kernel/debug/netdevsim/$DEV/psample/CAPTURE_FILE=$(mktemp)NUM_NETIFS=0source $lib_dir/lib.sh
DEVLINK_DEV=source $lib_dir/devlink_lib.shDEVLINK_DEV=netdevsim/${DEV}
# Available at https://github.com/Mellanox/libpsamplerequire_command psample
psample_capture(){ rm -f $CAPTURE_FILE
timeout 2 ip netns exec testns1 psample &> $CAPTURE_FILE}
psample_enable_test(){ RET=0
echo 1 > $PSAMPLE_DIR/enable check_err $? "Failed to enable sampling when should not"
echo 1 > $PSAMPLE_DIR/enable 2>/dev/null check_fail $? "Sampling enablement succeeded when should fail"
psample_capture if [ $(cat $CAPTURE_FILE | wc -l) -eq 0 ]; then check_err 1 "Failed to capture sampled packets" fi
echo 0 > $PSAMPLE_DIR/enable check_err $? "Failed to disable sampling when should not"
echo 0 > $PSAMPLE_DIR/enable 2>/dev/null check_fail $? "Sampling disablement succeeded when should fail"
psample_capture if [ $(cat $CAPTURE_FILE | wc -l) -ne 0 ]; then check_err 1 "Captured sampled packets when should not" fi
log_test "psample enable / disable"}
psample_group_num_test(){ RET=0
echo 1234 > $PSAMPLE_DIR/group_num echo 1 > $PSAMPLE_DIR/enable
psample_capture grep -q -e "group 1234" $CAPTURE_FILE check_err $? "Sampled packets reported with wrong group number"
# New group number should only be used after disable / enable. echo 4321 > $PSAMPLE_DIR/group_num
psample_capture grep -q -e "group 4321" $CAPTURE_FILE check_fail $? "Group number changed while sampling is active"
echo 0 > $PSAMPLE_DIR/enable && echo 1 > $PSAMPLE_DIR/enable
psample_capture grep -q -e "group 4321" $CAPTURE_FILE check_err $? "Group number did not change after restarting sampling"
log_test "psample group number"
echo 0 > $PSAMPLE_DIR/enable}
psample_md_test(){ RET=0
echo 1 > $PSAMPLE_DIR/enable
echo 1234 > $PSAMPLE_DIR/in_ifindex echo 4321 > $PSAMPLE_DIR/out_ifindex psample_capture
grep -q -e "in-ifindex 1234" $CAPTURE_FILE check_err $? "Sampled packets reported with wrong in-ifindex"
grep -q -e "out-ifindex 4321" $CAPTURE_FILE check_err $? "Sampled packets reported with wrong out-ifindex"
echo 5 > $PSAMPLE_DIR/out_tc psample_capture
grep -q -e "out-tc 5" $CAPTURE_FILE check_err $? "Sampled packets reported with wrong out-tc"
echo $((2**16 - 1)) > $PSAMPLE_DIR/out_tc psample_capture
grep -q -e "out-tc " $CAPTURE_FILE check_fail $? "Sampled packets reported with out-tc when should not"
echo 1 > $PSAMPLE_DIR/out_tc echo 10000 > $PSAMPLE_DIR/out_tc_occ_max psample_capture
grep -q -e "out-tc-occ " $CAPTURE_FILE check_err $? "Sampled packets not reported with out-tc-occ when should"
echo 0 > $PSAMPLE_DIR/out_tc_occ_max psample_capture
grep -q -e "out-tc-occ " $CAPTURE_FILE check_fail $? "Sampled packets reported with out-tc-occ when should not"
echo 10000 > $PSAMPLE_DIR/latency_max psample_capture
grep -q -e "latency " $CAPTURE_FILE check_err $? "Sampled packets not reported with latency when should"
echo 0 > $PSAMPLE_DIR/latency_max psample_capture
grep -q -e "latency " $CAPTURE_FILE check_fail $? "Sampled packets reported with latency when should not"
log_test "psample metadata"
echo 0 > $PSAMPLE_DIR/enable}
setup_prepare(){ modprobe netdevsim &> /dev/null
echo "$DEV_ADDR 1" > ${NETDEVSIM_PATH}/new_device while [ ! -d $SYSFS_NET_DIR ] ; do :; done
set -e
ip netns add testns1 devlink dev reload $DEVLINK_DEV netns testns1
set +e}
cleanup(){ pre_cleanup rm -f $CAPTURE_FILE ip netns del testns1 echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device modprobe -r netdevsim &> /dev/null}
trap cleanup EXIT
setup_prepare
tests_run
exit $EXIT_STATUS