#! /bin/sh
# XFS QA Test No. 030
# $Id: 1.3 $
#
# exercise xfs_repair repairing broken filesystems
#
#-----------------------------------------------------------------------
# Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
# 
# This program is free software; you can redistribute it and/or modify it
# under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
# 
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# 
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like.  Any license provided herein, whether implied or
# otherwise, applies only to this software file.  Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
# 
# You should have received a copy of the GNU General Public License along
# with this program; if not, write the Free Software Foundation, Inc., 59
# Temple Place - Suite 330, Boston MA 02111-1307, USA.
# 
# Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
# Mountain View, CA  94043, or:
# 
# http://www.sgi.com 
# 
# For further information regarding this notice, see: 
# 
# http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
#-----------------------------------------------------------------------
#
# creator
owner=nathans@sgi.com

seq=`basename $0`
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=1	# failure is the default!

_cleanup()
{
	umount $SCRATCH_DEV 2>/dev/null
	rm -f $tmp.*
}

trap "_cleanup; exit \$status" 0 1 2 3 15

# get standard environment, filters and checks
. ./common.rc
. ./common.filter
. ./common.repair

# nuke the superblock, AGI, AGF, AGFL; then try repair the damage
# 
_check_ag()
{
	for structure in 'sb 0' 'agf 0' 'agi 0' 'agfl 0'
	do
		echo "Corrupting $structure - setting bits to $1"
		_check_repair $1 "$structure"
	done
}

# real QA test starts here
_require_scratch

# first we need to ensure there are no bogus secondary
# superblocks between the primary and first secondary
# superblock (hanging around from earlier tests)...
# 
size="-d size=100m"
mkfs_xfs -f $size $SCRATCH_DEV >/dev/null 2>&1
if [ $? -ne 0 ]		# probably don't have a big enough scratch
then
	_notrun "SCRATCH_DEV too small, results would be non-deterministic"
else
	mount -t xfs $SCRATCH_DEV $SCRATCH_MNT
	src/feature -U $SCRATCH_DEV && \
		_notrun "Quota are enabled, test needs controlled sb recovery"
	src/feature -G $SCRATCH_DEV && \
		_notrun "Quota are enabled, test needs controlled sb recovery"
	umount $SCRATCH_DEV
fi
clear=""
eval `xfs_db -r -c "sb 1" -c stack $SCRATCH_DEV | perl -ne '
	if (/byte offset (\d+), length (\d+)/) {
		print "clear=", $1 / 512, "\n"; exit
	}'`
[ -z "$clear" ] && echo "Cannot calculate length to clear"
src/devzero -v -1 -n "$clear" $SCRATCH_DEV >/dev/null

# now kick off the real repair test...
# 
mkfs_xfs -f $size $SCRATCH_DEV | _filter_mkfs 2>$tmp.mkfs
source $tmp.mkfs
_check_ag 0
_check_ag -1


# success, all done
status=0
exit