diff options
Diffstat (limited to 'tests/qemu-iotests/125')
| -rwxr-xr-x | tests/qemu-iotests/125 | 86 |
1 files changed, 78 insertions, 8 deletions
diff --git a/tests/qemu-iotests/125 b/tests/qemu-iotests/125 index c20c71570c..46279d6b38 100755 --- a/tests/qemu-iotests/125 +++ b/tests/qemu-iotests/125 @@ -1,4 +1,5 @@ -#!/bin/bash +#!/usr/bin/env bash +# group: rw # # Test preallocated growth of qcow2 images # @@ -19,12 +20,11 @@ # # creator -owner=mreitz@redhat.com +owner=hreitz@redhat.com seq=$(basename $0) echo "QA output created by $seq" -here=$PWD status=1 # failure is the default! _cleanup() @@ -35,8 +35,7 @@ trap "_cleanup; exit \$status" 0 1 2 3 15 get_image_size_on_host() { - $QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep "disk size" \ - | sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/' + echo $(($(stat -c '%b * %B' "$TEST_IMG_FILE"))) } # get standard environment and filters @@ -45,12 +44,55 @@ get_image_size_on_host() _supported_fmt qcow2 _supported_proto file -_supported_os Linux +# Growing a file with a backing file (without preallocation=full or +# =falloc) requires zeroing the newly added area, which is impossible +# to do quickly for v2 images, and hence is unsupported. +_unsupported_imgopts 'compat=0.10' if [ -z "$TEST_IMG_FILE" ]; then TEST_IMG_FILE=$TEST_IMG fi +# Test whether we are running on a broken XFS version. There is this +# bug: + +# $ rm -f foo +# $ touch foo +# $ block_size=4096 # Your FS's block size +# $ fallocate -o $((block_size / 2)) -l $block_size foo +# $ LANG=C xfs_bmap foo | grep hole +# 1: [8..15]: hole +# +# The problem is that the XFS driver rounds down the offset and +# rounds up the length to the block size, but independently. As +# such, it only allocates the first block in the example above, +# even though it should allocate the first two blocks (because our +# request is to fallocate something that touches both the first +# two blocks). +# +# This means that when you then write to the beginning of the +# second block, the disk usage of the first two blocks grows. +# +# That is precisely what fallocate() promises, though: That when you +# write to an area that you have fallocated, no new blocks will have +# to be allocated. + +touch "$TEST_IMG_FILE" +# Assuming there is no FS with a block size greater than 64k +fallocate -o 65535 -l 2 "$TEST_IMG_FILE" +len0=$(get_image_size_on_host) + +# Write to something that in theory we have just fallocated +# (Thus, the on-disk size should not increase) +poke_file "$TEST_IMG_FILE" 65536 42 +len1=$(get_image_size_on_host) + +if [ $len1 -gt $len0 ]; then + _notrun "the test filesystem's fallocate() is broken" +fi + +rm -f "$TEST_IMG_FILE" + # Generally, we create some image with or without existing preallocation and # then resize it. Then we write some data into the image and verify that its # size does not change if we have used preallocation. @@ -77,7 +119,7 @@ for GROWTH_SIZE in 16 48 80; do for growth_mode in off metadata falloc full; do echo "--- cluster_size=$cluster_size growth_size=$GROWTH_SIZE create_mode=$create_mode growth_mode=$growth_mode ---" - IMGOPTS="preallocation=$create_mode,cluster_size=$cluster_size" _make_test_img ${CREATION_SIZE} + _make_test_img -o "preallocation=$create_mode,cluster_size=$cluster_size" ${CREATION_SIZE} $QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K host_size_0=$(get_image_size_on_host) @@ -113,7 +155,7 @@ for GROWTH_SIZE in 16 48 80; do if [ $file_length_2 -gt $file_length_1 ]; then echo "ERROR (grow): Image length has grown from $file_length_1 to $file_length_2" fi - if [ $create_mode != metadata ]; then + if [ $growth_mode != metadata ]; then # The host size should not have grown either if [ $host_size_2 -gt $host_size_1 ]; then echo "ERROR (grow): Host size has grown from $host_size_1 to $host_size_2" @@ -127,6 +169,34 @@ for GROWTH_SIZE in 16 48 80; do done done +# Test image resizing using preallocation and unaligned offsets +$QEMU_IMG create -f raw "$TEST_IMG.base" 128k | _filter_img_create +$QEMU_IO -c 'write -q -P 1 0 128k' -f raw "$TEST_IMG.base" +for orig_size in 31k 33k; do + for dst_size in 96k 128k; do + for prealloc in metadata full; do + echo "--- Resizing image from $orig_size to $dst_size (preallocation=$prealloc) ---" + _make_test_img -F raw -b "$TEST_IMG.base" -o cluster_size=64k "$orig_size" + $QEMU_IMG resize -f "$IMGFMT" --preallocation="$prealloc" "$TEST_IMG" "$dst_size" + # The first part of the image should contain data from the backing file + $QEMU_IO -c "read -q -P 1 0 ${orig_size}" "$TEST_IMG" + # The resized part of the image should contain zeroes + $QEMU_IO -c "read -q -P 0 ${orig_size} 63k" "$TEST_IMG" + # If the image does not have an external data file we can also verify its + # actual size. The resized image should have 7 clusters: + # header, L1 table, L2 table, refcount table, refcount block, 2 data clusters + if ! _get_data_file "$TEST_IMG" > /dev/null; then + expected_file_length=$((65536 * 7)) + file_length=$(stat -c '%s' "$TEST_IMG_FILE") + if [ "$file_length" != "$expected_file_length" ]; then + echo "ERROR: file length $file_length (expected $expected_file_length)" + fi + fi + echo + done + done +done + # success, all done echo '*** done' rm -f $seq.full |