mirror of
https://github.com/Motorhead1991/qemu.git
synced 2025-07-30 13:53:54 -06:00
c49dda7254
Fiona reported that ZFS makes sparse file testing awkward, since: - it has asynchronous allocation (not even 'fsync $file' makes du see the desired size; it takes the slower 'fsync -f $file' which is not appropriate for the tests) - for tests of fully allocated files, ZFS with compression enabled still reports smaller disk usage Add a new _require_disk_usage that quickly probes whether an attempt to create a sparse 5M file shows as less than 1M usage, while the same file with -o preallocation=full shows as more than 4M usage without sync, which should filter out ZFS behavior. Then use it in various affected tests. This does not add the new filter on all tests that Fiona is seeing ZFS failures on, but only those where I could quickly spot that there is at least one place where the test depends on the output of 'du -b' or 'stat -c %b'. Reported-by: Fiona Ebner <f.ebner@proxmox.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-ID: <20250523163041.2548675-8-eblake@redhat.com> Reviewed-by: Fiona Ebner <f.ebner@proxmox.com> Tested-by: Fiona Ebner <f.ebner@proxmox.com>
115 lines
3.2 KiB
Bash
Executable file
115 lines
3.2 KiB
Bash
Executable file
#!/usr/bin/env bash
|
|
# group: quick
|
|
#
|
|
# 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': $size}}
|
|
{'execute': 'quit'}
|
|
EOF
|
|
}
|
|
|
|
# get standard environment, filters and checks
|
|
. ./common.rc
|
|
. ./common.filter
|
|
|
|
_supported_fmt raw
|
|
_supported_proto file fuse
|
|
_supported_os Linux
|
|
|
|
_default_cache_mode none
|
|
_supported_cache_modes none directsync
|
|
_require_disk_usage
|
|
|
|
size=$((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
|
|
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
|
|
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
|
|
_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
|