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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2018 Oracle. All Rights Reserved.
#
# FS QA Test 185
#
# Fuzzy test for FS image duplication.
# Could be fixed by
# a9261d4125c9 ("btrfs: harden agaist duplicate fsid on scanned devices")
#
. ./common/preamble
_begin_fstest volume auto quick
mnt=$TEST_DIR/$seq.mnt
# Override the default cleanup function.
_cleanup()
{
rm -rf $mnt > /dev/null 2>&1
cd /
rm -f $tmp.*
}
# Import common functions.
. ./common/filter
# real QA test starts here
_supported_fs btrfs
_require_scratch_dev_pool 2
_scratch_dev_pool_get 2
device_1=$(echo $SCRATCH_DEV_POOL | $AWK_PROG '{print $1}')
device_2=$(echo $SCRATCH_DEV_POOL | $AWK_PROG '{print $2}')
echo device_1=$device_1 device_2=$device_2 >> $seqres.full
rm -rf $mnt > /dev/null 2>&1
mkdir $mnt
_mkfs_dev $device_1
_mount $device_1 $mnt
[[ $(findmnt $mnt | grep -v TARGET | $AWK_PROG '{print $2}') != $device_1 ]] && \
_fail "mounted device changed"
for sb_bytenr in 65536 67108864; do
echo -n "dd status=none if=$dev_foo of=$dev_bar bs=1 "\
"seek=$sb_bytenr skip=$sb_bytenr count=4096" >> $seqres.full
dd status=none if=$device_1 of=$device_2 bs=1 seek=$sb_bytenr \
skip=$sb_bytenr count=4096 > /dev/null 2>&1
echo ..:$? >> $seqres.full
done
# Original device is mounted, scan of its clone should fail
$BTRFS_UTIL_PROG device scan $device_2 >> $seqres.full 2>&1
[[ $? != 1 ]] && _fail "cloned device scan should fail"
[[ $(findmnt $mnt | grep -v TARGET | $AWK_PROG '{print $2}') != $device_1 ]] && \
_fail "mounted device changed"
# Original device scan should be successful
$BTRFS_UTIL_PROG device scan $device_1 >> $seqres.full 2>&1
[[ $? != 0 ]] && \
_fail "if it fails here, then it means subvolume mount at boot may fail "\
"in some configs."
$UMOUNT_PROG $mnt > /dev/null 2>&1
_scratch_dev_pool_put
# success, all done
echo "Silence is golden"
status=0
exit
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