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#!/bin/sh
# autopkgtest check: tgt and open-iscsi based mpath operations
# The test is intentionally extra verbose to have rich log and to stress
# some of the code paths in and around multipath on top of the actual IO test.
# (C) 2016 Canonical Ltd.
# Author: Christian Ehrhardt <christian.ehrhardt@canonical.com>
# Tests the creation and usage of a tgt target and lun on localhost
set -uxe
targetname="iqn.2016-11.foo.com:target.iscsi"
cwd=$(pwd)
testdir="/mnt/tgtmpathtest"
localhost="127.0.0.1"
portal="${localhost}:3260"
maxpaths=4
backfn="backingfile"
expectwwid="60000000000000000e00000000010001"
testdisk="/dev/disk/by-id/wwn-0x${expectwwid}"
bglog="$AUTOPKGTEST_ARTIFACTS/test-background.log"
fioprep="$AUTOPKGTEST_ARTIFACTS/path-change-prep.fio"
fiovrfy="$AUTOPKGTEST_ARTIFACTS/path-change-check.fio"
# Debian uses upstreams default for find_multipaths.
# Provide a WWID entry, so the devices will be managed by multipath(d).
mkdir -p /etc/multipath
echo "/360000000000000000e00000000010001/" > /etc/multipath/wwids
# Restart tgtd to make sure modules are all loaded
service tgt restart || echo "Failed to restart tgt" >&2
# prep SINGLE test file
truncate --size 100M ${backfn}
# create target
tgtadm --lld iscsi --op new --mode target --tid 1 -T "${targetname}"
# allow all to bind the target
tgtadm --lld iscsi --op bind --mode target --tid 1 -I ALL
# set backing file
tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 1 -b "${cwd}/${backfn}"
# scan for targets (locally)
iscsiadm --mode discovery --type sendtargets --portal ${localhost}
# login
echo "login #1"
iscsiadm --mode node --targetname "${targetname}" --portal ${portal} --login
# duplicate this session (always 1)
for i in $(seq 2 ${maxpaths})
do
echo "extra login #${i}"
iscsiadm --mode session -r 1 --op new
done
udevadm settle
sleep 5 # sleep a bit to allow device to be created.
# status summary
echo "Status after initial setup"
tgtadm --lld iscsi --mode target --op show
tgtadm --lld iscsi --op show --mode conn --tid 1
iscsiadm --mode session -P 1
lsscsi -liv
multipath -v3 -ll
dmsetup table
grep . /etc/multipath/*
systemctl status multipathd.service
# In certain systems, the socket may be inactive which will be a return code
# of 3 from systemctl. This is a fine situation to be in, as long as the rest of
# the test passes.
ret_code=0
systemctl status multipathd.socket || ret_code=$? \
&& { [ $ret_code -eq 0 ] || [ $ret_code -eq 3 ]; }
ls -la /dev/mapper/
echo "journal"
journalctl -b
echo "Test WWN should now point to DM"
readlink "${testdisk}" | grep dm
# create FS on the mpathed device
mkfs.ext4 -F "${testdisk}"
udevadm settle
sleep 3s
mkdir -p ${testdir}
mount "${testdisk}" ${testdir}
# based on /usr/share/doc/fio/examples/surface-scan.fio
cat << EOF > ${fioprep}
; writes 512 byte verification blocks until the disk is full,
; then verifies written data
[global]
directory=${testdir}
thread=1
bs=64k
direct=1
ioengine=sync
verify=meta
verify_pattern=0xaa555aa5
verify_interval=512
[write-phase]
filename=datafile.tmp ; or use a full disk, for example /dev/sda
rw=write
fill_device=1
do_verify=0
EOF
cat << EOF > ${fiovrfy}
; verifies written data
[global]
directory=${testdir}
thread=1
bs=64k
direct=1
ioengine=sync
verify=meta
verify_pattern=0xaa555aa5
verify_interval=512
[verify-phase]
stonewall
create_serialize=0
filename=datafile.tmp
rw=read
do_verify=1
runtime=180
time_based
EOF
# IO Bench with verify
# prep files
fio --max-jobs=4 "${fioprep}"
# while verify is running unplud/plug paths as well as restart the daemon
# Note - we run in a clean env, so we just assume each new session is an increment
# Even with other multipath/scsi devices on the system this is true, jutst no
# other iscsi logins are allowed - since the test runs under isolation-machine
# that should be safe.
# That way we can directly call IDs without huge logic on the session IDs
echo "Starting the path changes in background"
(
iscsiadm --mode session
sleep 10s
date +'MP report (expect 4) %H:%M:%S.%N'
multipath -ll
date +'UN-plug path 1 %H:%M:%S.%N'
iscsiadm --mode session -r 1 -u
iscsiadm --mode session
sleep 10s
date +'MP report (expect 3) %H:%M:%S.%N'
multipath -ll
date +'UN-plug path 2 %H:%M:%S.%N'
iscsiadm --mode session -r 2 -u
iscsiadm --mode session
sleep 10s
date +'MP report (expect 2) %H:%M:%S.%N'
multipath -ll
date +'UN-plug path 3 %H:%M:%S.%N'
iscsiadm --mode session -r 3 -u
iscsiadm --mode session
sleep 10s
date +'MP report (expect 1) %H:%M:%S.%N'
multipath -ll
date +'Add paths 5/6/7/8 %H:%M:%S.%N'
iscsiadm --mode session -r 4 --op new
iscsiadm --mode session -r 4 --op new
iscsiadm --mode session -r 4 --op new
iscsiadm --mode session -r 4 --op new
iscsiadm --mode session
sleep 10s
date +'MP report (expect 5) %H:%M:%S.%N'
multipath -ll
date +'UN-plug multiple paths 4/7/8 %H:%M:%S.%N'
iscsiadm --mode session -r 4 -u
iscsiadm --mode session -r 7 -u
iscsiadm --mode session -r 8 -u
iscsiadm --mode session
sleep 10s
date +'Restart multipath daemon %H:%M:%S.%N'
systemctl restart multipathd
sleep 10s
date +'Final background report (expect 2) %H:%M:%S.%N'
multipath -ll
) > "${bglog}" 2>&1 &
# test I/O with verification of actual content
# on any I/O error or verification of read data it would fail
date +'Pre FIO %H:%M:%S.%N'
fio --max-jobs=4 "${fiovrfy}"
date +'Post FIO %H:%M:%S.%N'
echo "FIO verify test with changing paths - OK"
echo "Report log of background activity"
cat "${bglog}"
sync
umount "${testdisk}"
# report stats - might be useful if checked across various tests that misbehave
echo "Final stats"
iscsiadm --mode session --stats
journalctl --no-pager -u multipathd
echo "Check final path status"
multipath -ll
# ensure we have one active and one running path
diskc=$(multipath -ll | grep --count 'status=')
diska=$(multipath -ll | grep --count 'status=active')
diske=$(multipath -ll | grep --count 'status=enabled')
if [ "${diskc}" -ne "2" -o "${diska}" -ne "1" -o "${diske}" -ne "1" ]; then
echo "Error: Not the expected count of active/enabled disks"
exit 1
else
echo "OK"
fi
# logout and target delete should work even after all of this
iscsiadm --mode node --targetname "${targetname}" --portal "${portal}" --logout
tgtadm --lld iscsi --op delete --mode logicalunit --tid 1 --lun 1
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