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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 23 owner=hreitz@redhat.com 24 25 seq=$(basename $0) 26 echo "QA output created by $seq" 27 28 status=1 # failure is the default! 29 30 _cleanup() 31 { 32 _cleanup_test_img 33 _rm_test_img "$TEST_IMG.base_new" 34 } 35 trap "_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 49 CLUSTER_SIZE=65536 50 51 echo 52 echo "=== Test rebase without input base ===" 53 echo 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 $((6 * CLUSTER_SIZE)) 69 TEST_IMG="$TEST_IMG.base_new" _make_test_img $((6 * CLUSTER_SIZE)) 70 71 echo 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 84 echo 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 96 echo 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 102 103 echo 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 113 114 echo 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 123 echo "*** done" 124 rm -f $seq.full 125 status=0