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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/extractloop.md5sums"
# Setup
cd /tmp
wget -nv --show-progress -c https://www.kernel.org/pub/linux/kernel/v3.0/linux-3.0.tar.gz
DIR1=$(mktemp -d)
DIR2=$(mktemp -d)
gocryptfs -q -init -extpass="echo test" $DIR1
gocryptfs -q -extpass="echo test" -nosyslog $DIR1 $DIR2
#gocryptfs -q -extpass="echo test" -nosyslog -memprofile /tmp/extractloop-mem $DIR1 $DIR2
cd $DIR2
# Cleanup trap
# Note: gocryptfs may have already umounted itself because bash relays SIGINT
# Just ignore fusermount errors.
trap "cd /; fusermount -u -z $DIR2; rm -rf $DIR1 $DIR2" EXIT
function loop {
# Note: In a subshell, $$ returns the PID of the *parent* shell,
# we need our own, which is why we have to use $BASHPID.
mkdir $BASHPID
cd $BASHPID
echo "[pid $BASHPID] Starting loop"
N=1
while true
do
t1=$SECONDS
tar xf /tmp/linux-3.0.tar.gz
md5sum --status -c $MD5
rm -Rf linux-3.0
t2=$SECONDS
delta=$((t2-t1))
echo "[pid $BASHPID] Iteration $N done, $delta seconds"
let N=$N+1
done
}
loop &
loop &
wait
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