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selftests: netdevsim: Test psample functionality
Test various aspects of psample functionality over netdevsim and in particular test that the psample module correctly reports the provided metadata. Example: # ./psample.sh TEST: psample enable / disable [ OK ] TEST: psample group number [ OK ] TEST: psample metadata [ OK ] Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Ido Schimmel
David S. Miller
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1 changed files with 181 additions and 0 deletions
181
tools/testing/selftests/drivers/net/netdevsim/psample.sh
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tools/testing/selftests/drivers/net/netdevsim/psample.sh
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# This test is for checking the psample module. It makes use of netdevsim
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# which periodically generates "sampled" packets.
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lib_dir=$(dirname $0)/../../../net/forwarding
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ALL_TESTS="
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psample_enable_test
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psample_group_num_test
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psample_md_test
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"
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NETDEVSIM_PATH=/sys/bus/netdevsim/
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DEV_ADDR=1337
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DEV=netdevsim${DEV_ADDR}
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DEVLINK_DEV=netdevsim/${DEV}
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SYSFS_NET_DIR=/sys/bus/netdevsim/devices/$DEV/net/
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PSAMPLE_DIR=/sys/kernel/debug/netdevsim/$DEV/psample/
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CAPTURE_FILE=$(mktemp)
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NUM_NETIFS=0
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source $lib_dir/lib.sh
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source $lib_dir/devlink_lib.sh
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# Available at https://github.com/Mellanox/libpsample
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require_command psample
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psample_capture()
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{
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rm -f $CAPTURE_FILE
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timeout 2 ip netns exec testns1 psample &> $CAPTURE_FILE
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}
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psample_enable_test()
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{
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RET=0
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echo 1 > $PSAMPLE_DIR/enable
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check_err $? "Failed to enable sampling when should not"
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echo 1 > $PSAMPLE_DIR/enable 2>/dev/null
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check_fail $? "Sampling enablement succeeded when should fail"
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psample_capture
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if [ $(cat $CAPTURE_FILE | wc -l) -eq 0 ]; then
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check_err 1 "Failed to capture sampled packets"
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fi
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echo 0 > $PSAMPLE_DIR/enable
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check_err $? "Failed to disable sampling when should not"
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echo 0 > $PSAMPLE_DIR/enable 2>/dev/null
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check_fail $? "Sampling disablement succeeded when should fail"
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psample_capture
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if [ $(cat $CAPTURE_FILE | wc -l) -ne 0 ]; then
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check_err 1 "Captured sampled packets when should not"
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fi
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log_test "psample enable / disable"
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}
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psample_group_num_test()
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{
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RET=0
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echo 1234 > $PSAMPLE_DIR/group_num
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echo 1 > $PSAMPLE_DIR/enable
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psample_capture
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grep -q -e "group 1234" $CAPTURE_FILE
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check_err $? "Sampled packets reported with wrong group number"
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# New group number should only be used after disable / enable.
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echo 4321 > $PSAMPLE_DIR/group_num
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psample_capture
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grep -q -e "group 4321" $CAPTURE_FILE
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check_fail $? "Group number changed while sampling is active"
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echo 0 > $PSAMPLE_DIR/enable && echo 1 > $PSAMPLE_DIR/enable
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psample_capture
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grep -q -e "group 4321" $CAPTURE_FILE
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check_err $? "Group number did not change after restarting sampling"
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log_test "psample group number"
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echo 0 > $PSAMPLE_DIR/enable
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}
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psample_md_test()
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{
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RET=0
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echo 1 > $PSAMPLE_DIR/enable
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echo 1234 > $PSAMPLE_DIR/in_ifindex
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echo 4321 > $PSAMPLE_DIR/out_ifindex
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psample_capture
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grep -q -e "in-ifindex 1234" $CAPTURE_FILE
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check_err $? "Sampled packets reported with wrong in-ifindex"
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grep -q -e "out-ifindex 4321" $CAPTURE_FILE
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check_err $? "Sampled packets reported with wrong out-ifindex"
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echo 5 > $PSAMPLE_DIR/out_tc
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psample_capture
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grep -q -e "out-tc 5" $CAPTURE_FILE
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check_err $? "Sampled packets reported with wrong out-tc"
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echo $((2**16 - 1)) > $PSAMPLE_DIR/out_tc
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psample_capture
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grep -q -e "out-tc " $CAPTURE_FILE
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check_fail $? "Sampled packets reported with out-tc when should not"
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echo 1 > $PSAMPLE_DIR/out_tc
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echo 10000 > $PSAMPLE_DIR/out_tc_occ_max
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psample_capture
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grep -q -e "out-tc-occ " $CAPTURE_FILE
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check_err $? "Sampled packets not reported with out-tc-occ when should"
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echo 0 > $PSAMPLE_DIR/out_tc_occ_max
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psample_capture
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grep -q -e "out-tc-occ " $CAPTURE_FILE
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check_fail $? "Sampled packets reported with out-tc-occ when should not"
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echo 10000 > $PSAMPLE_DIR/latency_max
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psample_capture
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grep -q -e "latency " $CAPTURE_FILE
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check_err $? "Sampled packets not reported with latency when should"
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echo 0 > $PSAMPLE_DIR/latency_max
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psample_capture
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grep -q -e "latency " $CAPTURE_FILE
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check_fail $? "Sampled packets reported with latency when should not"
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log_test "psample metadata"
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echo 0 > $PSAMPLE_DIR/enable
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}
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setup_prepare()
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{
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modprobe netdevsim &> /dev/null
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echo "$DEV_ADDR 1" > ${NETDEVSIM_PATH}/new_device
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while [ ! -d $SYSFS_NET_DIR ] ; do :; done
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set -e
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ip netns add testns1
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devlink dev reload $DEVLINK_DEV netns testns1
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set +e
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}
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cleanup()
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{
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pre_cleanup
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rm -f $CAPTURE_FILE
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ip netns del testns1
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echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device
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modprobe -r netdevsim &> /dev/null
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}
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trap cleanup EXIT
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setup_prepare
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tests_run
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exit $EXIT_STATUS
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