tests/ext4/026

#! /bin/bash
# FS QA Test 026
#
# Test for ea_inode feature in ext4. Without ea_inode feature, an extended
# attribute in ext4 cannot be larger than the fs block size. ea_inode feature
# allows storing xattr values in external inodes and so raises xattr value
# size limit to 64k.
#
#-----------------------------------------------------------------------
# Copyright (c) 2017 Google, Inc.  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"

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

_cleanup()
{
	rm -f $tmp.*
}

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

# remove previous $seqres.full before test
rm -f $seqres.full

# real QA test starts here
_supported_fs ext4
_supported_os Linux
_require_scratch
_require_attrs
_require_scratch_ext4_feature "ea_inode"

_scratch_mkfs_ext4 -O ea_inode >/dev/null 2>&1
_scratch_mount

# Sets an extended attribute on a file.
attr_set()
{
	local file=$1 name=$2 value=$3 tmp

	if [[ "$value" != "" ]]; then
		$SETFATTR_PROG -n $name -v "$value" $file
	else
		$SETFATTR_PROG -n $name $file
	fi

	tmp=$($GETFATTR_PROG --absolute-names --only-values -n $name $file)
	[[ "$tmp" == "$value" ]] || echo "unexpected value returned: $tmp"
}

# List attributes on a file.
attr_list()
{
	$GETFATTR_PROG --absolute-names $1 | grep -v '^#'
}

# Removes an extended attribute from a file.
attr_remove()
{
	local file=$1 name=$2

	$SETFATTR_PROG -x $name $file
}

# Test files.
x=$SCRATCH_MNT/x
y=$SCRATCH_MNT/y
z=$SCRATCH_MNT/z

# Attribute with short name that goes into inode body.
name_in_ibody=user.i

# Attribute with long name that goes into xattr block.
name_in_block=user.$(perl -e 'print "b" x 100;')

# Set large xattr values on multiple files.
touch $x $y $z
for file in $x $y $z; do
	for name in $name_in_ibody $name_in_block; do
		for size in 4096 8000 $((64*1024)); do
			attr_set $file $name-$size \
				$(perl -e "print 'v' x $size;")
		done
	done
	attr_list $file
done
rm $x $y $z

# Set/remove.
touch $x
attr_set $x $name_in_ibody $(perl -e "print 'i' x 25000;")
attr_set $x $name_in_block $(perl -e "print 'b' x 25000;")
attr_list $x
attr_remove $x $name_in_ibody
attr_remove $x $name_in_block
rm $x

# Set with same value twice.
touch $x
attr_set $x $name_in_ibody $(perl -e "print 'i' x 60000;")
attr_set $x $name_in_ibody $(perl -e "print 'i' x 60000;")
attr_list $x
rm $x

# Repeatedly set an extended attribute with various value sizes.
touch $x
for size in 0 10 80 900 1900 3000 9000 60 10000 0 8000 3000 10 0 20 10000 5; do
	attr_set $x user.1 $(perl -e "print 'v' x $size;")
done
attr_list $x
rm $x

# success, all done
status=0
exit