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#!/bin/bash | |
set -eu | |
export LC_ALL=C | |
LOOPS=40 | |
COUNT="${COUNT-20}" | |
PREFIX=/tmp/mounttest | |
systemd_mp() { | |
local id | |
id="$1" | |
systemd-escape -p "$PREFIX/mount/$id" | |
} | |
cleanup() { | |
echo "--- cleaning up" | |
# cleanup | |
systemctl daemon-reload | |
for i in $(seq $COUNT); do | |
systemctl stop "$(systemd_mp "$i").mount" || true | |
rm -f "/etc/systemd/system/$(systemd_mp "$i").mount" | |
done | |
systemctl daemon-reload | |
for m in $(grep "$PREFIX/mount/" /proc/self/mountinfo | awk '{print $5}'); do | |
umount "$m" | |
done | |
} | |
random_sleep() { | |
local long | |
long="${1-5}" | |
sleep $(bc <<< "scale=4; $long*$RANDOM/32767") | |
} | |
if ! which bc 2>/dev/null; then | |
echo "error: bc not found, install proper package" | |
exit 1 | |
fi | |
variant=0 | |
case "${1-}" in | |
--cleanup) | |
cleanup | |
exit 0 | |
;; | |
--variant-before) | |
variant=1 | |
;; | |
--variant-systemd-mount) | |
variant=2 | |
;; | |
--variant-mount) | |
variant=3 | |
;; | |
--variant-many-reloads) | |
variant=4 | |
;; | |
esac | |
mkdir -p $PREFIX | |
# create a bunch of disks | |
for i in $(seq $COUNT); do | |
what="$PREFIX/disk-$i.img" | |
where="$PREFIX/mount/$i" | |
if [ ! -e "$what" ];then | |
dd if=/dev/zero of="$PREFIX/disk-$i.img" bs=1M count=10 >/dev/null | |
mkfs.ext4 -F "$PREFIX/disk-$i.img" >/dev/null | |
echo "$i" > "$PREFIX/canary" | |
debugfs -w -R "write $PREFIX/canary canary" "$PREFIX/disk-$i.img" | |
fi | |
mkdir -p "$PREFIX/mount/$i" | |
systemd_unit="$PREFIX/$(systemd_mp "$i").mount" | |
if [ ! -e "$systemd_unit" ]; then | |
cat <<EOF > "$systemd_unit" | |
[Unit] | |
Description=mount unit for test $i | |
[Mount] | |
What=$what | |
Where=$where | |
Type=ext4 | |
Options=nodev | |
EOF | |
fi | |
done | |
trap "echo interrupted: run with --cleanup" SIGINT | |
if [[ "$variant" = "1" ]]; then | |
for i in $(seq $COUNT); do | |
unit_name="$(systemd_mp "$i").mount" | |
cp "$PREFIX/$unit_name" "/etc/systemd/system/$unit_name" | |
done | |
systemctl daemon-reload | |
fi | |
verify() { | |
local i | |
i="$1" | |
text="$(findmnt -ln)" | |
if ! echo "$text" | grep -q "$PREFIX/mount/$i "; then | |
echo "disk-$i missing" | |
echo "mountinfo: $text" | |
return 1 | |
fi | |
local content | |
content="$(cat "$PREFIX/mount/$i/canary")" | |
if [[ "$content" != "$i" ]]; then | |
echo "unexpected content in disk $i: '$content'" | |
return 1 | |
fi | |
} | |
variant_0() { | |
local i | |
i="$1" | |
unit_name="$(systemd_mp "$i").mount" | |
cp "$PREFIX/$unit_name" "/etc/systemd/system/$unit_name" | |
random_sleep | |
systemctl daemon-reload | |
systemctl start "$unit_name" | |
random_sleep | |
verify "$i" | |
systemctl stop "$unit_name" | |
rm -f "/etc/systemd/system/$unit_name" | |
systemctl daemon-reload | |
} | |
variant_1() { | |
local i | |
i="$1" | |
unit_name="$(systemd_mp "$i").mount" | |
systemctl start "$unit_name" | |
random_sleep | |
verify "$i" | |
systemctl stop "$unit_name" | |
} | |
variant_2() { | |
local i | |
i="$1" | |
what="$PREFIX/disk-$i.img" | |
where="$PREFIX/mount/$i" | |
systemd-mount -o nodev "$what" "$where" | |
random_sleep | |
verify "$i" | |
systemd-mount --umount "$what" "$where" | |
} | |
variant_3() { | |
local i | |
i="$1" | |
what="$PREFIX/disk-$i.img" | |
where="$PREFIX/mount/$i" | |
mount -o nodev "$what" "$where" | |
#random_sleep 1 | |
sleep 1 | |
verify "$i" | |
umount "$where" | |
} | |
variant_4() { | |
local i | |
i="$1" | |
unit_name="$(systemd_mp "$i").mount" | |
if [[ "$i" == 1 ]]; then | |
cp "$PREFIX/$unit_name" "/etc/systemd/system/$unit_name" | |
fi | |
random_sleep | |
systemctl daemon-reload | |
if [[ "$i" == 1 ]]; then | |
systemctl start "$unit_name" | |
random_sleep | |
verify "$i" | |
systemctl stop "$unit_name" | |
rm -f "/etc/systemd/system/$unit_name" | |
fi | |
} | |
some_failed=0 | |
for r in $(seq $LOOPS); do | |
echo "--- run $r $(date)" | |
[[ "$variant" == "3" ]] && losetup -l | |
for idx in $(seq $COUNT); do | |
( | |
set -eu | |
case "$variant" in | |
0) | |
variant_0 "$idx" | |
;; | |
1) | |
variant_1 "$idx" | |
;; | |
2) | |
variant_2 "$idx" | |
;; | |
3) | |
variant_3 "$idx" | |
;; | |
4) | |
variant_4 "$idx" | |
;; | |
esac | |
) & | |
done | |
for _ in $(seq $COUNT); do | |
if ! wait -n ; then | |
some_failed=1 | |
fi | |
done | |
if [[ "$some_failed" != "0" ]]; then | |
break | |
fi | |
if [[ "$variant" == "3" ]]; then | |
losetup -D || true | |
losetup -l | |
fi | |
done | |
if [[ "$some_failed" == "0" ]]; then | |
cleanup | |
else | |
echo "-- failed units, skipping cleanup, use --cleanup manually" | |
fi |
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