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#!/usr/bin/env bash
#
# Test creating raw image preallocation mode
#
# Copyright (C) 2017 Nir Soffer <nirsof@gmail.com>
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will 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, see <http://www.gnu.org/licenses/>.
#
# creator
owner=nirsof@gmail.com
seq=`basename $0`
echo "QA output created by $seq"
status=1 # failure is the default!
_cleanup()
{
_cleanup_test_img
rm -f "$TEST_DIR/empty"
}
trap "_cleanup; exit \$status" 0 1 2 3 15
# Some file systems sometimes allocate extra blocks independently of
# the file size. This function hides the resulting difference in the
# stat -c '%b' output.
# Parameter 1: Number of blocks an empty file occupies
# Parameter 2: Minimal number of blocks in an image
# Parameter 3: Image size in bytes
_filter_blocks()
{
extra_blocks=$1
min_blocks=$2
img_size=$3
sed -e "s/blocks=$min_blocks\\(\$\\|[^0-9]\\)/min allocation/" \
-e "s/blocks=$((extra_blocks + img_size / 512))\\(\$\\|[^0-9]\\)/max allocation/"
}
# Resize image using block_resize.
# Parameter 1: image path
# Parameter 2: new size
_block_resize()
{
local path=$1
local size=$2
$QEMU -qmp stdio -nographic -nodefaults \
-blockdev file,node-name=file,filename=$path,cache.direct=on \
<<EOF
{'execute': 'qmp_capabilities'}
{'execute': 'block_resize', 'arguments': {'node-name': 'file', 'size': $size}}
{'execute': 'quit'}
EOF
}
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
_supported_fmt raw
_supported_proto file
_supported_os Linux
_default_cache_mode none
_supported_cache_modes none directsync
size=$((1 * 1024 * 1024))
touch "$TEST_DIR/empty"
extra_blocks=$(stat -c '%b' "$TEST_DIR/empty")
# We always write the first byte; check how many blocks this filesystem
# allocates to match empty image alloation.
printf "\0" > "$TEST_DIR/empty"
min_blocks=$(stat -c '%b' "$TEST_DIR/empty")
echo
echo "== creating image with default preallocation =="
_make_test_img -o extent_size_hint=0 $size | _filter_imgfmt
stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $size
for mode in off full falloc; do
echo
echo "== creating image with preallocation $mode =="
_make_test_img -o preallocation=$mode,extent_size_hint=0 $size | _filter_imgfmt
stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $size
done
for new_size in 4096 1048576; do
echo
echo "== resize empty image with block_resize =="
_make_test_img -o extent_size_hint=0 0 | _filter_imgfmt
_block_resize $TEST_IMG $new_size >/dev/null
stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $new_size
done
# success, all done
echo "*** done"
rm -f $seq.full
status=0
|
