#! /bin/bash
# FS QA Test No. 310
#
# Create a file with more than 2^21 blocks (the max length of a bmbt record).
#
#-----------------------------------------------------------------------
# Copyright (c) 2016, Oracle and/or its affiliates.  All Rights Reserved.
#
# This program 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.
#
# 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.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#-----------------------------------------------------------------------

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

here=`pwd`
tmp=/tmp/$$
status=1    # failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
	cd /
	umount $SCRATCH_MNT > /dev/null 2>&1
	_dmhugedisk_cleanup
	rm -rf $tmp.*
}

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

# real QA test starts here
_supported_os Linux
_supported_fs xfs
_require_scratch_nocheck
_require_xfs_scratch_rmapbt
_require_xfs_io_command "falloc"

rm -f $seqres.full

# Figure out block size
echo "Figure out block size"
_scratch_mkfs >/dev/null 2>&1
_scratch_mount >> $seqres.full

testdir=$SCRATCH_MNT/test-$seq
blksz="$(_get_block_size $SCRATCH_MNT)"

_scratch_unmount

echo "Format huge device"
nr_blks=2100000	# 2^21 plus a little more
sectors=$(( (nr_blks * 3) * blksz / 512 )) # each AG must have > 2^21 blocks
_dmhugedisk_init $sectors
_mkfs_dev -d agcount=2 $DMHUGEDISK_DEV
_mount $DMHUGEDISK_DEV $SCRATCH_MNT
xfs_info $SCRATCH_MNT >> $seqres.full

echo "Create the original file blocks"
mkdir $testdir
blksz="$(_get_block_size $testdir)"
$XFS_IO_PROG -f -c "falloc 0 $((nr_blks * blksz))" $testdir/file1 >> $seqres.full

# make sure the allocator didn't allocate more than the needed two extents
echo "Check extent count"
xfs_bmap -l -p -v $testdir/file1 | grep '^[[:space:]]*2:' -q && xfs_bmap -l -p -v $testdir/file1
inum=$(stat -c '%i' $testdir/file1)
umount $SCRATCH_MNT

echo "Check bmap count"
nr_bmaps=$(xfs_db -c "inode $inum" -c "bmap" $DMHUGEDISK_DEV | grep 'data offset' | wc -l)
test $nr_bmaps -gt 1 || xfs_db -c "inode $inum" -c "bmap" $DMHUGEDISK_DEV
#xfs_db -c "agf 0" -c p -c "inode $inum" -c "bmap" $DMHUGEDISK_DEV

echo "Check rmap count"
nr_rmaps=$(xfs_db -c 'agf 0' -c 'addr rmaproot' -c 'p' $DMHUGEDISK_DEV | grep ",$inum,[0-9]*,1,0,0" | wc -l)
test $nr_rmaps -eq 1 || xfs_db -c 'agf 0' -c 'addr rmaproot' -c 'p' $DMHUGEDISK_DEV | grep ",$inum,[0-9]*,1,0,0"

echo "Check and fake-repair huge filesystem" | tee -a $seqres.full
$XFS_DB_PROG -c 'check' $DMHUGEDISK_DEV
$XFS_REPAIR_PROG -n $DMHUGEDISK_DEV >> $seqres.full 2>&1
test $? -eq 0 || echo "xfs_repair -n failed, see $seqres.full"

echo "Real repair huge filesystem" | tee -a $seqres.full
$XFS_REPAIR_PROG $DMHUGEDISK_DEV >> $seqres.full 2>&1
test $? -eq 0 || echo "xfs_repair failed, see $seqres.full"

echo "Check bmap count again"
nr_bmaps=$(xfs_db -c "inode $inum" -c "bmap" $DMHUGEDISK_DEV | grep 'data offset' | wc -l)
test $nr_bmaps -gt 1 || xfs_db -c "inode $inum" -c "bmap" $DMHUGEDISK_DEV

echo "Check rmap count again"
nr_rmaps=$(xfs_db -c 'agf 0' -c 'addr rmaproot' -c 'p' $DMHUGEDISK_DEV | grep ",$inum,[0-9]*,1,0,0" | wc -l)
test $nr_rmaps -eq 1 || xfs_db -c 'agf 0' -c 'addr rmaproot' -c 'p' $DMHUGEDISK_DEV | grep ",$inum,[0-9]*,1,0,0"

echo "Check and fake-repair huge filesystem again" | tee -a $seqres.full
$XFS_DB_PROG -c 'check' $DMHUGEDISK_DEV
$XFS_REPAIR_PROG -n $DMHUGEDISK_DEV >> $seqres.full 2>&1

echo "Done"

# success, all done
status=0
exit