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1#!/usr/bin/env bash 2# group: rw auto backing quick 3# 4# Tests for rebasing COW images that require zero cluster support 5# 6# Copyright (C) 2019 Red Hat, Inc. 7# 8# This program is free software; you can redistribute it and/or modify 9# it under the terms of the GNU General Public License as published by 10# the Free Software Foundation; either version 2 of the License, or 11# (at your option) any later version. 12# 13# This program is distributed in the hope that it will be useful, 14# but WITHOUT ANY WARRANTY; without even the implied warranty of 15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16# GNU General Public License for more details. 17# 18# You should have received a copy of the GNU General Public License 19# along with this program. If not, see <http://www.gnu.org/licenses/>. 20# 21 22# creator 23owner=mreitz@redhat.com 24 25seq=$(basename $0) 26echo "QA output created by $seq" 27 28status=1 # failure is the default! 29 30_cleanup() 31{ 32 _cleanup_test_img 33 _rm_test_img "$TEST_IMG.base_new" 34} 35trap "_cleanup; exit \$status" 0 1 2 3 15 36 37# get standard environment, filters and checks 38. ./common.rc 39. ./common.filter 40. ./common.pattern 41 42# Currently only qcow2 and qed support rebasing, and only qcow2 v3 has 43# zero cluster support 44_supported_fmt qcow2 45_unsupported_imgopts 'compat=0.10' 46_supported_proto file fuse 47_supported_os Linux 48 49CLUSTER_SIZE=65536 50 51echo 52echo "=== Test rebase without input base ===" 53echo 54 55# Cluster allocations to be tested: 56# 57# Backing (new) 11 -- 11 -- 11 -- 58# COW image 22 22 11 11 -- -- 59# 60# Expected result: 61# 62# COW image 22 22 11 11 00 -- 63# 64# (Cluster 2 might be "--" after the rebase, too, but rebase just 65# compares the new backing file to the old one and disregards the 66# overlay. Therefore, it will never discard overlay clusters.) 67 68_make_test_img $((6 * CLUSTER_SIZE)) 69TEST_IMG="$TEST_IMG.base_new" _make_test_img $((6 * CLUSTER_SIZE)) 70 71echo 72 73$QEMU_IO "$TEST_IMG" \ 74 -c "write -P 0x22 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ 75 -c "write -P 0x11 $((2 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ 76 | _filter_qemu_io 77 78$QEMU_IO "$TEST_IMG.base_new" \ 79 -c "write -P 0x11 $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ 80 -c "write -P 0x11 $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ 81 -c "write -P 0x11 $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ 82 | _filter_qemu_io 83 84echo 85 86# This should be a no-op 87$QEMU_IMG rebase -b "" "$TEST_IMG" 88 89# Verify the data is correct 90$QEMU_IO "$TEST_IMG" \ 91 -c "read -P 0x22 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ 92 -c "read -P 0x11 $((2 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ 93 -c "read -P 0x00 $((4 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ 94 | _filter_qemu_io 95 96echo 97 98# Verify the allocation status (first four cluster should be allocated 99# in TEST_IMG, clusters 4 and 5 should be unallocated (marked as zero 100# clusters here because there is no backing file)) 101$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map 102 103echo 104 105$QEMU_IMG rebase -b "$TEST_IMG.base_new" -F $IMGFMT "$TEST_IMG" 106 107# Verify the data is correct 108$QEMU_IO "$TEST_IMG" \ 109 -c "read -P 0x22 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ 110 -c "read -P 0x11 $((2 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ 111 -c "read -P 0x00 $((4 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ 112 | _filter_qemu_io 113 114echo 115 116# Verify the allocation status (first four cluster should be allocated 117# in TEST_IMG, cluster 4 should be zero, and cluster 5 should be 118# unallocated (signified by '"depth": 1')) 119$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map 120 121 122# success, all done 123echo "*** done" 124rm -f $seq.full 125status=0