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| author | Andrey Drobyshev <andrey.drobyshev@virtuozzo.com> | 2023-09-19 19:57:58 +0300 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2023-10-31 13:51:28 +0100 |
| commit | 827171c3180533f4ad0bc338ea166f401bb5d348 (patch) | |
| tree | 534323a4917947763ea4b07fe44f5ae8470fbba8 /tests/qemu-iotests/024 | |
| parent | 8b097fd6b06ec295faefd4f30f96f8709abc9605 (diff) | |
qemu-iotests: 024: add rebasing test case for overlay_size > backing_size
Before previous commit, rebase was getting infitely stuck in case of
rebasing within the same backing chain and when overlay_size > backing_size.
Let's add this case to the rebasing test 024 to make sure it doesn't
break again.
Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Message-ID: <20230919165804.439110-3-andrey.drobyshev@virtuozzo.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'tests/qemu-iotests/024')
| -rwxr-xr-x | tests/qemu-iotests/024 | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/tests/qemu-iotests/024 b/tests/qemu-iotests/024 index 25a564a150..98a7c8fd65 100755 --- a/tests/qemu-iotests/024 +++ b/tests/qemu-iotests/024 @@ -199,6 +199,63 @@ echo # $BASE_OLD and $BASE_NEW) $QEMU_IMG map "$OVERLAY" | _filter_qemu_img_map +# Check that rebase within the chain is working when +# overlay_size > old_backing_size +# +# base_new <-- base_old <-- overlay +# +# Backing (new): 11 11 11 11 11 +# Backing (old): 22 22 22 22 +# Overlay: -- -- -- -- -- +# +# As a result, overlay should contain data identical to base_old, with the +# last cluster remaining unallocated. + +echo +echo "=== Test rebase within one backing chain ===" +echo + +echo "Creating backing chain" +echo + +TEST_IMG=$BASE_NEW _make_test_img $(( CLUSTER_SIZE * 5 )) +TEST_IMG=$BASE_OLD _make_test_img -b "$BASE_NEW" -F $IMGFMT \ + $(( CLUSTER_SIZE * 4 )) +TEST_IMG=$OVERLAY _make_test_img -b "$BASE_OLD" -F $IMGFMT \ + $(( CLUSTER_SIZE * 5 )) + +echo +echo "Fill backing files with data" +echo + +$QEMU_IO "$BASE_NEW" -c "write -P 0x11 0 $(( CLUSTER_SIZE * 5 ))" \ + | _filter_qemu_io +$QEMU_IO "$BASE_OLD" -c "write -P 0x22 0 $(( CLUSTER_SIZE * 4 ))" \ + | _filter_qemu_io + +echo +echo "Check the last cluster is zeroed in overlay before the rebase" +echo +$QEMU_IO "$OVERLAY" -c "read -P 0x00 $(( CLUSTER_SIZE * 4 )) $CLUSTER_SIZE" \ + | _filter_qemu_io + +echo +echo "Rebase onto another image in the same chain" +echo + +$QEMU_IMG rebase -b "$BASE_NEW" -F $IMGFMT "$OVERLAY" + +echo "Verify that data is read the same before and after rebase" +echo + +# Verify the first 4 clusters are still read the same as in the old base +$QEMU_IO "$OVERLAY" -c "read -P 0x22 0 $(( CLUSTER_SIZE * 4 ))" \ + | _filter_qemu_io +# Verify the last cluster still reads as zeroes +$QEMU_IO "$OVERLAY" -c "read -P 0x00 $(( CLUSTER_SIZE * 4 )) $CLUSTER_SIZE" \ + | _filter_qemu_io + +echo # success, all done echo "*** done" |