#!/usr/bin/env bash # # Rebasing COW images # # Copyright (C) 2009 Red Hat, Inc. # # 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 . # # creator owner=kwolf@redhat.com seq=`basename $0` echo "QA output created by $seq" status=1 # failure is the default! _cleanup() { _cleanup_test_img _rm_test_img "$TEST_DIR/t.$IMGFMT.base_old" _rm_test_img "$TEST_DIR/t.$IMGFMT.base_new" _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT" _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.base_old" _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.base_new" rmdir "$TEST_DIR/subdir" 2> /dev/null } trap "_cleanup; exit \$status" 0 1 2 3 15 # get standard environment, filters and checks . ./common.rc . ./common.filter . ./common.pattern # Currently only qcow2 and qed support rebasing _supported_fmt qcow2 qed _supported_proto file _supported_os Linux CLUSTER_SIZE=65536 # Cluster allocations to be tested: # # Backing (old) 11 -- 11 -- 11 -- 11 -- # Backing (new) 22 22 -- -- 22 22 -- -- # COW image 33 33 33 33 -- -- -- -- # # The pattern is written twice to have both an alloc -> non-alloc and a # non-alloc -> alloc transition in the COW image. echo "Creating backing file" echo TEST_IMG_SAVE="$TEST_IMG" TEST_IMG="$TEST_IMG.base_old" _make_test_img 1G io_pattern writev 0 $CLUSTER_SIZE $((2 * CLUSTER_SIZE)) 8 0x11 TEST_IMG="$TEST_IMG_SAVE.base_new" echo "Creating new backing file" echo _make_test_img 1G io_pattern writev 0 $((2 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 4 0x22 TEST_IMG="$TEST_IMG_SAVE" echo "Creating COW image" echo _make_test_img -b "$TEST_IMG.base_old" 1G io_pattern writev 0 $((4 * CLUSTER_SIZE)) 0 1 0x33 io_pattern writev $((8 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 0 1 0x33 echo "Read before the rebase to make sure everything is set up correctly" echo io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 io_pattern readv $((8 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((9 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((10 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((11 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((12 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 io_pattern readv $((13 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 io_pattern readv $((14 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 io_pattern readv $((15 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 echo echo Rebase and test again echo $QEMU_IMG rebase -b "$TEST_IMG.base_new" "$TEST_IMG" io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 io_pattern readv $((8 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((9 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((10 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((11 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 io_pattern readv $((12 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 io_pattern readv $((13 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 io_pattern readv $((14 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 io_pattern readv $((15 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 echo echo "=== Test rebase in a subdirectory of the working directory ===" echo # Clean up the old images beforehand so they do not interfere with # this test _cleanup mkdir "$TEST_DIR/subdir" # Relative to the overlay BASE_OLD_OREL="t.$IMGFMT.base_old" BASE_NEW_OREL="t.$IMGFMT.base_new" # Relative to $TEST_DIR (which is going to be our working directory) OVERLAY_WREL="subdir/t.$IMGFMT" BASE_OLD="$TEST_DIR/subdir/$BASE_OLD_OREL" BASE_NEW="$TEST_DIR/subdir/$BASE_NEW_OREL" OVERLAY="$TEST_DIR/$OVERLAY_WREL" # Test done here: # # Backing (old): 11 11 -- 11 # Backing (new): -- 22 22 11 # Overlay: -- -- -- -- # # Rebasing works, we have verified that above. Here, we just want to # see that rebasing is done for the correct target backing file. TEST_IMG=$BASE_OLD _make_test_img 1M TEST_IMG=$BASE_NEW _make_test_img 1M TEST_IMG=$OVERLAY _make_test_img -b "$BASE_OLD_OREL" 1M echo $QEMU_IO "$BASE_OLD" \ -c "write -P 0x11 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ -c "write -P 0x11 $((3 * CLUSTER_SIZE)) $((1 * CLUSTER_SIZE))" \ | _filter_qemu_io $QEMU_IO "$BASE_NEW" \ -c "write -P 0x22 $((1 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ -c "write -P 0x11 $((3 * CLUSTER_SIZE)) $((1 * CLUSTER_SIZE))" \ | _filter_qemu_io echo pushd "$TEST_DIR" >/dev/null $QEMU_IMG rebase -f "$IMGFMT" -b "$BASE_NEW_OREL" "$OVERLAY_WREL" popd >/dev/null # Verify the backing path is correct TEST_IMG=$OVERLAY _img_info | grep '^backing file' echo # Verify the data is correct $QEMU_IO "$OVERLAY" \ -c "read -P 0x11 $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ -c "read -P 0x11 $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ -c "read -P 0x00 $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ -c "read -P 0x11 $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ | _filter_qemu_io echo # Verify that cluster #3 is not allocated (because it is the same in # $BASE_OLD and $BASE_NEW) $QEMU_IMG map "$OVERLAY" | _filter_qemu_img_map # success, all done echo "*** done" rm -f $seq.full status=0