From 66449bf56b22d2f6b6309649b4c4819217c1cee5 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher <jakobunt@gmail.com>
Date: Sat, 3 Oct 2020 14:21:21 +0200
Subject: [PATCH] tests: fsstress-gocryptfs.bash: add DEBUG option

Also add a wrapper script, fsstress.collect-crashes.sh, to collect
the debug output.

https://github.com/hanwen/go-fuse/issues/372
---
 tests/stress_tests/fsstress-gocryptfs.bash    | 28 ++++++++++---------
 .../stress_tests/fsstress.collect-crashes.sh  | 21 ++++++++++++++
 2 files changed, 36 insertions(+), 13 deletions(-)
 create mode 100755 tests/stress_tests/fsstress.collect-crashes.sh

diff --git a/tests/stress_tests/fsstress-gocryptfs.bash b/tests/stress_tests/fsstress-gocryptfs.bash
index 5f8c6dc..91952a1 100755
--- a/tests/stress_tests/fsstress-gocryptfs.bash
+++ b/tests/stress_tests/fsstress-gocryptfs.bash
@@ -12,20 +12,19 @@
 #
 # Nowadays it should pass an indefinite number of iterations.
 
-if [[ -z $TMPDIR ]]; then
-	TMPDIR=/var/tmp
-	export TMPDIR
-fi
-
 set -eu
 
+# Init variables to default values if unset or empty
+export TMPDIR=${TMPDIR:-/var/tmp}
+DEBUG=${DEBUG:-0}
+
 cd "$(dirname "$0")"
 MYNAME=$(basename $0)
 source ../fuse-unmount.bash
 
 # fsstress binary
 FSSTRESS=$HOME/fuse-xfstests/ltp/fsstress
-if [ ! -x $FSSTRESS ]
+if [[ ! -x $FSSTRESS ]]
 then
 	echo "$MYNAME: fsstress binary not found at $FSSTRESS"
 	echo "Please clone and compile https://github.com/rfjakob/fuse-xfstests"
@@ -47,22 +46,25 @@ for i in $(mount | cut -d" " -f3 | grep $TMPDIR/$MYNAME) ; do
 done
 
 # FS-specific compile and mount
-if [ $MYNAME = fsstress-loopback.bash ]; then
+if [[ $MYNAME = fsstress-loopback.bash ]]; then
 	echo -n "Recompile go-fuse loopback: "
 	cd $GOPATH/src/github.com/hanwen/go-fuse/example/loopback
 	git describe
 	go build && go install
-	$GOPATH/bin/loopback -q $MNT $DIR &
+	OPTS="-q"
+	if [[ $DEBUG -eq 1 ]]; then
+		OPTS="-debug"
+	fi
+	$GOPATH/bin/loopback $OPTS "$MNT" "$DIR" &
 	disown
-elif [ $MYNAME = fsstress-gocryptfs.bash ]; then
+elif [[ $MYNAME = fsstress-gocryptfs.bash ]]; then
 	echo "Recompile gocryptfs"
 	cd $GOPATH/src/github.com/rfjakob/gocryptfs
 	./build.bash # also prints the version
 	$GOPATH/bin/gocryptfs -q -init -extpass "echo test" -scryptn=10 $DIR
-	$GOPATH/bin/gocryptfs -q -extpass "echo test" -nosyslog $DIR $MNT
-elif [ $MYNAME = fsstress-encfs.bash ]; then
-	# You probably want do adjust this path to your system
-	/home/jakob.donotbackup/encfs/build/encfs --extpass "echo test" --standard $DIR $MNT
+	$GOPATH/bin/gocryptfs -q -extpass "echo test" -nosyslog -fusedebug=$DEBUG $DIR $MNT
+elif [[ $MYNAME = fsstress-encfs.bash ]]; then
+	encfs --extpass "echo test" --standard $DIR $MNT
 else
 	echo Unknown mode: $MYNAME
 	exit 1
diff --git a/tests/stress_tests/fsstress.collect-crashes.sh b/tests/stress_tests/fsstress.collect-crashes.sh
new file mode 100755
index 0000000..f315e2e
--- /dev/null
+++ b/tests/stress_tests/fsstress.collect-crashes.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+cd ~/go/src/github.com/rfjakob/gocryptfs/tests/stress_tests || exit 1
+export TMPDIR=/mnt/ext4-ramdisk
+# Check that TMPDIR is writeable
+touch "$TMPDIR/$$" || exit 1
+rm "$TMPDIR/$$"
+LOGDIR=/tmp/$$
+mkdir "$LOGDIR" || exit 1
+echo "Logging to LOGDIR=$LOGDIR, TMPDIR=$TMPDIR"
+for i in $(seq 1 1000) ; do
+	set -x
+	LOG="$LOGDIR/fsstress.log.$(date --iso).$i"
+	if [[ -e $LOG ]]; then
+		continue
+	fi
+	rm -Rf "$TMPDIR"/fsstress*
+	#   100000 lines ...... ~7 MB
+	#  1000000 lines ..... ~70 MB
+	# 10000000 lines .... ~700 MB
+	DEBUG=1 ./fsstress-loopback.bash 2>&1 | tail -1000000 > "$LOG"
+done