tests: Add loop-overlay test

The test will check proper loop device reuse and error in case of overlapping
loop device.

Signed-off-by: Stanislav Brabec <sbrabec@suse.cz>

1 files changed, 64 insertions, 0 deletions

diff --git a/tests/ts/libmount/loop-overlay b/tests/ts/libmount/loop-overlay
new file mode 100755
index 000000000..6fcb81d4d
--- /dev/null
+++ b/tests/ts/libmount/loop-overlay
@@ -0,0 +1,64 @@
+#!/bin/bash
+
+#
+# Copyright (C) 2016 Stanislav Brabec <sbrabec@suse.cz>
+#
+# This file is part of util-linux.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+TS_TOPDIR="${0%/*}/../.."
+TS_DESC="loop (fstab)"
+
+. $TS_TOPDIR/functions.sh
+ts_init "$*"
+
+ts_check_test_command "$TS_CMD_LOSETUP"
+ts_check_test_command "$TS_CMD_MOUNT"
+ts_check_test_command "$TS_CMD_UMOUNT"
+
+ts_skip_nonroot
+ts_check_prog "mkfs.ext3"
+ts_check_prog "dd"
+ts_check_prog "stat"
+# Default from functions.sh:ts_image_init()
+mib=${1:-"5"}
+
+IMG=$(ts_image_init)
+
+mkfs.ext3 -F "$IMG" &> /dev/null || ts_die "Cannot make ext3 on $IMG"
+OFFSET=`stat -c %s "$IMG"`
+dd if=$IMG of=$IMG oflag=append bs=${mib}M count=1 conv=notrunc status=none
+
+[ -d "$TS_MOUNTPOINT-1" ] || mkdir -p $TS_MOUNTPOINT-1
+[ -d "$TS_MOUNTPOINT-2" ] || mkdir -p $TS_MOUNTPOINT-2
+
+echo "second should fail" >>$TS_OUTPUT
+$TS_CMD_MOUNT -oloop "$IMG" "$TS_MOUNTPOINT-1" >> $TS_OUTPUT 2>&1
+$TS_CMD_MOUNT -oloop,offset=$OFFSET "$IMG" "$TS_MOUNTPOINT-2" 2>&1 | sed 's/.*://' >>$TS_OUTPUT
+
+$TS_CMD_UMOUNT "$TS_MOUNTPOINT-1" >> $TS_OUTPUT 2>&1
+
+echo "should succeed" >>$TS_OUTPUT
+$TS_CMD_MOUNT -oloop,sizelimit=$OFFSET "$IMG" "$TS_MOUNTPOINT-1" >> $TS_OUTPUT 2>&1
+$TS_CMD_MOUNT -oloop,offset=$OFFSET "$IMG" "$TS_MOUNTPOINT-2" >> $TS_OUTPUT 2>&1
+$TS_CMD_UMOUNT "$TS_MOUNTPOINT-1" >> $TS_OUTPUT 2>&1
+$TS_CMD_UMOUNT "$TS_MOUNTPOINT-2" >> $TS_OUTPUT 2>&1
+
+echo "both should fail" >>$TS_OUTPUT
+LOOPDEV=$($TS_CMD_LOSETUP --find)
+$TS_CMD_LOSETUP --offset 1 --sizelimit $OFFSET $LOOPDEV "$IMG"
+$TS_CMD_MOUNT -oloop,sizelimit=$OFFSET "$IMG" "$TS_MOUNTPOINT-1" 2>&1 | sed 's/.*://' >>$TS_OUTPUT
+$TS_CMD_MOUNT -oloop,offset=$OFFSET "$IMG" "$TS_MOUNTPOINT-2" 2>&1 | sed 's/.*://' >>$TS_OUTPUT
+$TS_CMD_LOSETUP --detach $LOOPDEV
+
+ts_log "Success"
+ts_finalize