Add shell script to do some simple operations with simplefs

- create fs
- create files in it
- create dirs in it
- read files in it
- write files in it

simple-test.sh

@@ -0,0 +1,101 @@
+#!/usr/bin/env bash
+
+#
+# Do some simple operations with simplefs
+#
+# - create fs
+# - create files in it
+# - create dirs in it
+# - read files in it
+# - write files in it
+#
+# TODO: add support of perms into simplefs,
+# to avoid calling this script from root.
+#
+
+set -e
+
+root_pwd="$PWD"
+test_dir="test-dir-$RANDOM"
+test_mount_point="test-mount-point-$RANDOM"
+
+function create_test_image()
+{
+    dd bs=4096 count=100 if=/dev/zero of="$1"
+    ./mkfs-simplefs "$1"
+}
+function mount_fs_image()
+{
+    insmod simplefs.ko
+    mount -o loop,owner,group,users -t simplefs "$1" "$2"
+    dmesg | tail -n20
+}
+function unmount_fs()
+{
+    umount "$1"
+    rmmod simplefs.ko
+    dmesg | tail -n20
+}
+function do_some_operations()
+{
+    cd "$1"
+
+    ls
+    cat vanakkam
+
+    cp vanakkam hello
+    cat hello
+
+    echo "Hello World" > hello
+    cat hello
+
+    mkdir dir1 && cd dir1
+
+    cp ../hello .
+    cat hello
+
+    echo "First level directory" > hello
+    cat hello
+
+    mkdir dir2 && cd dir2
+
+    touch hello
+    cat hello
+
+    echo "Second level directory" > hello
+    cat hello
+}
+function cleanup()
+{
+    cat /proc/mounts | grep simplefs | awk '{print $2}' | xargs -r umount
+    lsmod | grep -q simplefs && rmmod "$root_pwd/simplefs.ko"
+
+    # TODO: prompt deletion
+    rm -fR "$test_dir" "$test_mount_point"
+}
+
+
+# Trace all commands
+set -x
+
+make
+
+cleanup
+trap cleanup SIGINT EXIT
+mkdir "$test_dir" "$test_mount_point"
+create_test_image "$test_dir/image"
+
+# 1
+mount_fs_image "$test_dir/image" "$test_mount_point"
+do_some_operations "$test_mount_point"
+cd "$root_pwd"
+unmount_fs "$test_mount_point"
+
+# 2
+mount_fs_image "$test_dir/image" "$test_mount_point"
+ls -lR "$test_mount_point"
+unmount_fs "$test_mount_point"
+
+dmesg | tail -n40
+
+cleanup