28036a7f70
Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20180509182002.8044-3-mreitz@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
207 lines
6.3 KiB
Bash
Executable File
207 lines
6.3 KiB
Bash
Executable File
#!/bin/bash
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#
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# Rebasing COW images
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#
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# Copyright (C) 2009 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# creator
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owner=kwolf@redhat.com
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seq=`basename $0`
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echo "QA output created by $seq"
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here=`pwd`
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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rm -f "$TEST_DIR/t.$IMGFMT.base_old"
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rm -f "$TEST_DIR/t.$IMGFMT.base_new"
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rm -f "$TEST_DIR/subdir/t.$IMGFMT"
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rm -f "$TEST_DIR/subdir/t.$IMGFMT.base_old"
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rm -f "$TEST_DIR/subdir/t.$IMGFMT.base_new"
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rmdir "$TEST_DIR/subdir" 2> /dev/null
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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. ./common.pattern
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# Currently only qcow2 and qed support rebasing
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_supported_fmt qcow2 qed
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_supported_proto file
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_supported_os Linux
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CLUSTER_SIZE=65536
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# Cluster allocations to be tested:
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#
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# Backing (old) 11 -- 11 -- 11 -- 11 --
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# Backing (new) 22 22 -- -- 22 22 -- --
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# COW image 33 33 33 33 -- -- -- --
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#
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# The pattern is written twice to have both an alloc -> non-alloc and a
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# non-alloc -> alloc transition in the COW image.
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echo "Creating backing file"
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echo
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TEST_IMG_SAVE="$TEST_IMG"
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TEST_IMG="$TEST_IMG.base_old"
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_make_test_img 1G
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io_pattern writev 0 $CLUSTER_SIZE $((2 * CLUSTER_SIZE)) 8 0x11
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TEST_IMG="$TEST_IMG_SAVE.base_new"
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echo "Creating new backing file"
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echo
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_make_test_img 1G
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io_pattern writev 0 $((2 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 4 0x22
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TEST_IMG="$TEST_IMG_SAVE"
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echo "Creating COW image"
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echo
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_make_test_img -b "$TEST_IMG.base_old" 1G
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io_pattern writev 0 $((4 * CLUSTER_SIZE)) 0 1 0x33
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io_pattern writev $((8 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 0 1 0x33
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echo "Read before the rebase to make sure everything is set up correctly"
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echo
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io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
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io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
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io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
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io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
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io_pattern readv $((8 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((9 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((10 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((11 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((12 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
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io_pattern readv $((13 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
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io_pattern readv $((14 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
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io_pattern readv $((15 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
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echo
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echo Rebase and test again
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echo
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$QEMU_IMG rebase -b "$TEST_IMG.base_new" "$TEST_IMG"
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io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
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io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
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io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
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io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
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io_pattern readv $((8 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((9 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((10 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((11 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
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io_pattern readv $((12 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
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io_pattern readv $((13 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
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io_pattern readv $((14 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
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io_pattern readv $((15 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
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echo
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echo "=== Test rebase in a subdirectory of the working directory ==="
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echo
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# Clean up the old images beforehand so they do not interfere with
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# this test
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_cleanup
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mkdir "$TEST_DIR/subdir"
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# Relative to the overlay
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BASE_OLD_OREL="t.$IMGFMT.base_old"
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BASE_NEW_OREL="t.$IMGFMT.base_new"
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# Relative to $TEST_DIR (which is going to be our working directory)
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OVERLAY_WREL="subdir/t.$IMGFMT"
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BASE_OLD="$TEST_DIR/subdir/$BASE_OLD_OREL"
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BASE_NEW="$TEST_DIR/subdir/$BASE_NEW_OREL"
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OVERLAY="$TEST_DIR/$OVERLAY_WREL"
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# Test done here:
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#
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# Backing (old): 11 11 -- 11
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# Backing (new): -- 22 22 11
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# Overlay: -- -- -- --
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#
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# Rebasing works, we have verified that above. Here, we just want to
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# see that rebasing is done for the correct target backing file.
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TEST_IMG=$BASE_OLD _make_test_img 1M
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TEST_IMG=$BASE_NEW _make_test_img 1M
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TEST_IMG=$OVERLAY _make_test_img -b "$BASE_OLD_OREL" 1M
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echo
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$QEMU_IO "$BASE_OLD" \
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-c "write -P 0x11 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
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-c "write -P 0x11 $((3 * CLUSTER_SIZE)) $((1 * CLUSTER_SIZE))" \
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| _filter_qemu_io
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$QEMU_IO "$BASE_NEW" \
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-c "write -P 0x22 $((1 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
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-c "write -P 0x11 $((3 * CLUSTER_SIZE)) $((1 * CLUSTER_SIZE))" \
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| _filter_qemu_io
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echo
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pushd "$TEST_DIR" >/dev/null
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$QEMU_IMG rebase -f "$IMGFMT" -b "$BASE_NEW_OREL" "$OVERLAY_WREL"
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popd >/dev/null
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# Verify the backing path is correct
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TEST_IMG=$OVERLAY _img_info | grep '^backing file'
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echo
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# Verify the data is correct
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$QEMU_IO "$OVERLAY" \
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-c "read -P 0x11 $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
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-c "read -P 0x11 $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
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-c "read -P 0x00 $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
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-c "read -P 0x11 $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
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| _filter_qemu_io
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echo
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# Verify that cluster #3 is not allocated (because it is the same in
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# $BASE_OLD and $BASE_NEW)
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$QEMU_IMG map "$OVERLAY" | _filter_qemu_img_map
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# success, all done
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echo "*** done"
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rm -f $seq.full
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status=0
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