| 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 |