tests/xfs/206

#! /bin/bash
# FS QA Test No. 206
#
# Test trim of last small AG for large filesystem resizes
#
# As reported at
# http://article.gmane.org/gmane.comp.file-systems.xfs.general/29187
# this trimming may cause an overflow in the new size calculation.
# Patch and testcase at
# http://article.gmane.org/gmane.comp.file-systems.xfs.general/29193
#
#-----------------------------------------------------------------------
# Copyright (c) 2009 Eric Sandeen.
#
# 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()
{
    umount $tmpdir
    rmdir $tmpdir
    rm -f $tmp
    rm -f $tmpfile
}

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

# real QA test starts here

# Modify as appropriate.
_supported_fs xfs
_supported_os Linux
_require_test
_require_loop

bitsperlong=`src/feature -w`
if [ "$bitsperlong" -ne 64 ]; then
	_notrun "This test is only valid on 64 bit machines"
fi

rm -f $seqres.full

tmpfile=$TEST_DIR/fsfile.$$
tmpdir=$TEST_DIR/tmpdir.$$

mkdir -p $tmpdir || _fail "!!! failed to create temp mount dir"

# Create a file w/ the offset we wish to resize to
echo "=== truncate file ==="
dd if=/dev/zero of=$tmpfile bs=1 seek=19998630180864 count=1 >/dev/null 2>&1 \
	|| _fail "!!! failed to truncate loopback file to correct size"

mkfs_filter()
{
	sed -e 's/meta-data=[^ ]*/meta-data=FILE/' \
	    -e 's/ *isize=[0-9]* / isize=N /' \
	    -e "s/\(^log.*blocks=\)\([0-9]*,\)/\1XXXXX,/" \
	    -e "s/, projid32bit=[0-9]//" \
	    -e "s/ ftype=[0-9]//" \
	    -e "/.*reflink=/d" \
	    -e "s/\(sectsz\)\(=[0-9]* *\)/\1=512   /" \
	    -e "s/\(sunit=\)\([0-9]* blks,\)/\10 blks,/" \
	    -e "s/, lazy-count=[0-9]//" \
	    -e "/.*crc=/d" \
	    -e "/^Default configuration/d"
}

# mkfs slightly smaller than that, small log for speed.
echo "=== mkfs.xfs ==="
mkfs.xfs -f -bsize=4096 -l size=32m -dagsize=76288719b,size=3905982455b \
	 $tmpfile  | mkfs_filter

mount -o loop $tmpfile $tmpdir || _fail "!!! failed to loopback mount"

# see what happens when we growfs it
echo "=== xfs_growfs ==="
xfs_growfs $tmpdir  | mkfs_filter

# and double-check the new geometry
echo "=== xfs_info ==="
xfs_info $tmpdir | mkfs_filter

# _cleanup cleans up for us

# success, all done
status=0
exit