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#!/bin/bash
#
# Mount a gocryptfs filesystem somewhere on /tmp, then run two parallel
# infinite loops inside that do the following:
# 1) Extract linux-3.0.tar.gz
# 2) Verify the md5sums
# 3) Delete, go to (1)
#
# This test is good at discovering inode-related memory leaks because it creates
# huge numbers of files.
set -eu
cd "$(dirname "$0")"
MD5="$PWD/linux-3.0.md5sums"
# Setup dirs
cd /tmp
wget -nv --show-progress -c https://www.kernel.org/pub/linux/kernel/v3.0/linux-3.0.tar.gz
CRYPT=$(mktemp -d /tmp/extractloop.XXX)
CSV=$CRYPT.csv
MNT=$CRYPT.mnt
mkdir $MNT
# Mount
FSPID=0
if [ $# -eq 1 ] && [ "$1" == "-encfs" ]; then
echo "Testing EncFS"
encfs --extpass="echo test" --standard $CRYPT $MNT > /dev/null
elif [ $# -eq 1 ] && [ "$1" == "-loopback" ]; then
echo "Testing go-fuse loopback"
rm -f /tmp/loopback*.memprof
loopback -l -memprofile=/tmp/loopback $MNT $CRYPT &
FSPID=$(jobs -p)
else
echo "Testing gocryptfs"
gocryptfs -q -init -extpass="echo test" -scryptn=10 $CRYPT
gocryptfs -q -extpass="echo test" -nosyslog -f $CRYPT $MNT &
FSPID=$(jobs -p)
#gocryptfs -q -extpass="echo test" -nosyslog -memprofile /tmp/extractloop-mem $CRYPT $MNT
fi
echo "Test dir: $CRYPT"
# Sleep to make sure the FS is already mounted on MNT
sleep 1
cd $MNT
ln -sTf $CSV /tmp/extractloop.csv
# Cleanup trap
# Note: gocryptfs may have already umounted itself because bash relays SIGINT
# Just ignore fusermount errors.
trap "cd /; fusermount -u -z $MNT; rm -rf $CRYPT $MNT" EXIT
function loop {
# Note: In a subshell, $$ returns the PID of the parent shell.
# We need our own PID, which is why we use $BASHPID.
mkdir $BASHPID
cd $BASHPID
echo "[pid $BASHPID] Starting loop"
N=1
RSS=0
while true
do
t1=$SECONDS
tar xf /tmp/linux-3.0.tar.gz
md5sum --status -c $MD5
rm -Rf linux-3.0
t2=$SECONDS
delta=$((t2-t1))
if [ $FSPID -gt 0 ]; then
RSS=$(grep VmRSS /proc/$FSPID/status | tr -s ' ' | cut -f2 -d ' ')
echo "$N,$SECONDS,$RSS" >> $CSV
fi
echo "[pid $BASHPID] Iteration $N done, $delta seconds, RSS $RSS kiB"
let N=$N+1
done
}
function memprof {
while true; do
kill -USR1 $FSPID
sleep 60
done
}
loop &
loop &
#memprof &
wait
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