tests: Add iotest mirror-sparse for recent patches

Prove that blockdev-mirror can now result in sparse raw destination
files, regardless of whether the source is raw or qcow2.  By making
this a separate test, it was possible to test effects of individual
patches for the various pieces that all have to work together for a
sparse mirror to be successful.

Note that ./check -file produces different job lengths than ./check
-qcow2 (the test uses a filter to normalize); that's because when
deciding how much of the image to be mirrored, the code looks at how
much of the source image was allocated (for qcow2, this is only the
written clusters; for raw, it is the entire file).  But the important
part is that the destination file ends up smaller than 3M, rather than
the 20M it used to be before this patch series.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-ID: <20250509204341.3553601-28-eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

diff --git a/tests/qemu-iotests/tests/mirror-sparse b/tests/qemu-iotests/tests/mirror-sparse
new file mode 100755 (executable)
index 0000000..8c52a4e
--- /dev/null
+++ b/tests/qemu-iotests/tests/mirror-sparse
@@ -0,0 +1,125 @@
+#!/usr/bin/env bash
+# group: rw auto quick
+#
+# Test blockdev-mirror with raw sparse destination
+#
+# Copyright (C) 2025 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 <http://www.gnu.org/licenses/>.
+#
+
+seq="$(basename $0)"
+echo "QA output created by $seq"
+
+status=1 # failure is the default!
+
+_cleanup()
+{
+    _cleanup_test_img
+    _cleanup_qemu
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+cd ..
+. ./common.rc
+. ./common.filter
+. ./common.qemu
+
+_supported_fmt qcow2 raw  # Format of the source. dst is always raw file
+_supported_proto file
+_supported_os Linux
+
+echo
+echo "=== Initial image setup ==="
+echo
+
+TEST_IMG="$TEST_IMG.base" _make_test_img 20M
+$QEMU_IO -c 'w 8M 2M' -f $IMGFMT "$TEST_IMG.base" | _filter_qemu_io
+
+_launch_qemu \
+    -blockdev '{"driver":"file", "cache":{"direct":true, "no-flush":false},
+                "filename":"'"$TEST_IMG.base"'", "node-name":"src-file"}' \
+    -blockdev '{"driver":"'$IMGFMT'", "node-name":"src", "file":"src-file"}'
+h1=$QEMU_HANDLE
+_send_qemu_cmd $h1 '{"execute": "qmp_capabilities"}' 'return'
+
+# Check several combinations; most should result in a sparse destination;
+# the destination should only be fully allocated if pre-allocated
+# and not punching holes due to detect-zeroes
+# do_test creation discard zeroes result
+do_test() {
+    creation=$1
+    discard=$2
+    zeroes=$3
+    expected=$4
+
+echo
+echo "=== Testing creation=$creation discard=$discard zeroes=$zeroes ==="
+echo
+
+rm -f $TEST_IMG
+if test $creation = external; then
+    truncate --size=20M $TEST_IMG
+else
+    _send_qemu_cmd $h1 '{"execute": "blockdev-create", "arguments":
+          {"options": {"driver":"file", "filename":"'$TEST_IMG'",
+            "size":'$((20*1024*1024))', "preallocation":"'$creation'"},
+           "job-id":"job1"}}' 'concluded'
+    _send_qemu_cmd $h1 '{"execute": "job-dismiss", "arguments":
+          {"id": "job1"}}' 'return'
+fi
+_send_qemu_cmd $h1 '{"execute": "blockdev-add", "arguments":
+                     {"node-name": "dst", "driver":"file",
+                      "filename":"'$TEST_IMG'", "aio":"threads",
+                      "auto-read-only":true, "discard":"'$discard'",
+                      "detect-zeroes":"'$zeroes'"}}' 'return'
+_send_qemu_cmd $h1 '{"execute":"blockdev-mirror", "arguments":
+                     {"sync":"full", "device":"src", "target":"dst",
+                      "job-id":"job2"}}' 'return'
+_timed_wait_for $h1 '"ready"'
+_send_qemu_cmd $h1 '{"execute": "job-complete", "arguments":
+               {"id":"job2"}}' 'return' \
+                  | _filter_block_job_offset | _filter_block_job_len
+_send_qemu_cmd $h1 '{"execute": "blockdev-del", "arguments":
+                {"node-name": "dst"}}' 'return' \
+                  | _filter_block_job_offset | _filter_block_job_len
+$QEMU_IMG compare -U -f $IMGFMT -F raw $TEST_IMG.base $TEST_IMG
+result=$(disk_usage $TEST_IMG)
+if test $result -lt $((3*1024*1024)); then
+    actual=sparse
+elif test $result = $((20*1024*1024)); then
+    actual=full
+else
+    actual=unknown
+fi
+echo "Destination is $actual; expected $expected"
+}
+
+do_test external ignore off sparse
+do_test external unmap off sparse
+do_test external unmap unmap sparse
+do_test off ignore off sparse
+do_test off unmap off sparse
+do_test off unmap unmap sparse
+do_test full ignore off full
+do_test full unmap off sparse
+do_test full unmap unmap sparse
+
+_send_qemu_cmd $h1 '{"execute":"quit"}' ''
+
+# success, all done
+echo '*** done'
+rm -f $seq.full
+status=0

diff --git a/tests/qemu-iotests/tests/mirror-sparse.out b/tests/qemu-iotests/tests/mirror-sparse.out
new file mode 100644 (file)
index 0000000..2103b89
--- /dev/null
+++ b/tests/qemu-iotests/tests/mirror-sparse.out
@@ -0,0 +1,365 @@
+QA output created by mirror-sparse
+
+=== Initial image setup ===
+
+Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=20971520
+wrote 2097152/2097152 bytes at offset 8388608
+2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+{"execute": "qmp_capabilities"}
+{"return": {}}
+
+=== Testing creation=external discard=ignore zeroes=off ===
+
+{"execute": "blockdev-add", "arguments":
+                     {"node-name": "dst", "driver":"file",
+                      "filename":"TEST_DIR/t.IMGFMT", "aio":"threads",
+                      "auto-read-only":true, "discard":"ignore",
+                      "detect-zeroes":"off"}}
+{"return": {}}
+{"execute":"blockdev-mirror", "arguments":
+                     {"sync":"full", "device":"src", "target":"dst",
+                      "job-id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job2"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "ready", "id": "job2"}}
+{"execute": "job-complete", "arguments":
+               {"id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"return": {}}
+{"execute": "blockdev-del", "arguments":
+                {"node-name": "dst"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job2"}}
+{"return": {}}
+Images are identical.
+Destination is sparse; expected sparse
+
+=== Testing creation=external discard=unmap zeroes=off ===
+
+{"execute": "blockdev-add", "arguments":
+                     {"node-name": "dst", "driver":"file",
+                      "filename":"TEST_DIR/t.IMGFMT", "aio":"threads",
+                      "auto-read-only":true, "discard":"unmap",
+                      "detect-zeroes":"off"}}
+{"return": {}}
+{"execute":"blockdev-mirror", "arguments":
+                     {"sync":"full", "device":"src", "target":"dst",
+                      "job-id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job2"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "ready", "id": "job2"}}
+{"execute": "job-complete", "arguments":
+               {"id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"return": {}}
+{"execute": "blockdev-del", "arguments":
+                {"node-name": "dst"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job2"}}
+{"return": {}}
+Images are identical.
+Destination is sparse; expected sparse
+
+=== Testing creation=external discard=unmap zeroes=unmap ===
+
+{"execute": "blockdev-add", "arguments":
+                     {"node-name": "dst", "driver":"file",
+                      "filename":"TEST_DIR/t.IMGFMT", "aio":"threads",
+                      "auto-read-only":true, "discard":"unmap",
+                      "detect-zeroes":"unmap"}}
+{"return": {}}
+{"execute":"blockdev-mirror", "arguments":
+                     {"sync":"full", "device":"src", "target":"dst",
+                      "job-id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job2"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "ready", "id": "job2"}}
+{"execute": "job-complete", "arguments":
+               {"id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"return": {}}
+{"execute": "blockdev-del", "arguments":
+                {"node-name": "dst"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job2"}}
+{"return": {}}
+Images are identical.
+Destination is sparse; expected sparse
+
+=== Testing creation=off discard=ignore zeroes=off ===
+
+{"execute": "blockdev-create", "arguments":
+          {"options": {"driver":"file", "filename":"TEST_DIR/t.IMGFMT",
+            "size":20971520, "preallocation":"off"},
+           "job-id":"job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job1"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job1"}}
+{"execute": "job-dismiss", "arguments":
+          {"id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job1"}}
+{"return": {}}
+{"execute": "blockdev-add", "arguments":
+                     {"node-name": "dst", "driver":"file",
+                      "filename":"TEST_DIR/t.IMGFMT", "aio":"threads",
+                      "auto-read-only":true, "discard":"ignore",
+                      "detect-zeroes":"off"}}
+{"return": {}}
+{"execute":"blockdev-mirror", "arguments":
+                     {"sync":"full", "device":"src", "target":"dst",
+                      "job-id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job2"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "ready", "id": "job2"}}
+{"execute": "job-complete", "arguments":
+               {"id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"return": {}}
+{"execute": "blockdev-del", "arguments":
+                {"node-name": "dst"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job2"}}
+{"return": {}}
+Images are identical.
+Destination is sparse; expected sparse
+
+=== Testing creation=off discard=unmap zeroes=off ===
+
+{"execute": "blockdev-create", "arguments":
+          {"options": {"driver":"file", "filename":"TEST_DIR/t.IMGFMT",
+            "size":20971520, "preallocation":"off"},
+           "job-id":"job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job1"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job1"}}
+{"execute": "job-dismiss", "arguments":
+          {"id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job1"}}
+{"return": {}}
+{"execute": "blockdev-add", "arguments":
+                     {"node-name": "dst", "driver":"file",
+                      "filename":"TEST_DIR/t.IMGFMT", "aio":"threads",
+                      "auto-read-only":true, "discard":"unmap",
+                      "detect-zeroes":"off"}}
+{"return": {}}
+{"execute":"blockdev-mirror", "arguments":
+                     {"sync":"full", "device":"src", "target":"dst",
+                      "job-id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job2"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "ready", "id": "job2"}}
+{"execute": "job-complete", "arguments":
+               {"id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"return": {}}
+{"execute": "blockdev-del", "arguments":
+                {"node-name": "dst"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job2"}}
+{"return": {}}
+Images are identical.
+Destination is sparse; expected sparse
+
+=== Testing creation=off discard=unmap zeroes=unmap ===
+
+{"execute": "blockdev-create", "arguments":
+          {"options": {"driver":"file", "filename":"TEST_DIR/t.IMGFMT",
+            "size":20971520, "preallocation":"off"},
+           "job-id":"job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job1"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job1"}}
+{"execute": "job-dismiss", "arguments":
+          {"id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job1"}}
+{"return": {}}
+{"execute": "blockdev-add", "arguments":
+                     {"node-name": "dst", "driver":"file",
+                      "filename":"TEST_DIR/t.IMGFMT", "aio":"threads",
+                      "auto-read-only":true, "discard":"unmap",
+                      "detect-zeroes":"unmap"}}
+{"return": {}}
+{"execute":"blockdev-mirror", "arguments":
+                     {"sync":"full", "device":"src", "target":"dst",
+                      "job-id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job2"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "ready", "id": "job2"}}
+{"execute": "job-complete", "arguments":
+               {"id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"return": {}}
+{"execute": "blockdev-del", "arguments":
+                {"node-name": "dst"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job2"}}
+{"return": {}}
+Images are identical.
+Destination is sparse; expected sparse
+
+=== Testing creation=full discard=ignore zeroes=off ===
+
+{"execute": "blockdev-create", "arguments":
+          {"options": {"driver":"file", "filename":"TEST_DIR/t.IMGFMT",
+            "size":20971520, "preallocation":"full"},
+           "job-id":"job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job1"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job1"}}
+{"execute": "job-dismiss", "arguments":
+          {"id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job1"}}
+{"return": {}}
+{"execute": "blockdev-add", "arguments":
+                     {"node-name": "dst", "driver":"file",
+                      "filename":"TEST_DIR/t.IMGFMT", "aio":"threads",
+                      "auto-read-only":true, "discard":"ignore",
+                      "detect-zeroes":"off"}}
+{"return": {}}
+{"execute":"blockdev-mirror", "arguments":
+                     {"sync":"full", "device":"src", "target":"dst",
+                      "job-id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job2"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "ready", "id": "job2"}}
+{"execute": "job-complete", "arguments":
+               {"id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"return": {}}
+{"execute": "blockdev-del", "arguments":
+                {"node-name": "dst"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job2"}}
+{"return": {}}
+Images are identical.
+Destination is full; expected full
+
+=== Testing creation=full discard=unmap zeroes=off ===
+
+{"execute": "blockdev-create", "arguments":
+          {"options": {"driver":"file", "filename":"TEST_DIR/t.IMGFMT",
+            "size":20971520, "preallocation":"full"},
+           "job-id":"job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job1"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job1"}}
+{"execute": "job-dismiss", "arguments":
+          {"id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job1"}}
+{"return": {}}
+{"execute": "blockdev-add", "arguments":
+                     {"node-name": "dst", "driver":"file",
+                      "filename":"TEST_DIR/t.IMGFMT", "aio":"threads",
+                      "auto-read-only":true, "discard":"unmap",
+                      "detect-zeroes":"off"}}
+{"return": {}}
+{"execute":"blockdev-mirror", "arguments":
+                     {"sync":"full", "device":"src", "target":"dst",
+                      "job-id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job2"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "ready", "id": "job2"}}
+{"execute": "job-complete", "arguments":
+               {"id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"return": {}}
+{"execute": "blockdev-del", "arguments":
+                {"node-name": "dst"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job2"}}
+{"return": {}}
+Images are identical.
+Destination is sparse; expected sparse
+
+=== Testing creation=full discard=unmap zeroes=unmap ===
+
+{"execute": "blockdev-create", "arguments":
+          {"options": {"driver":"file", "filename":"TEST_DIR/t.IMGFMT",
+            "size":20971520, "preallocation":"full"},
+           "job-id":"job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job1"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job1"}}
+{"execute": "job-dismiss", "arguments":
+          {"id": "job1"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job1"}}
+{"return": {}}
+{"execute": "blockdev-add", "arguments":
+                     {"node-name": "dst", "driver":"file",
+                      "filename":"TEST_DIR/t.IMGFMT", "aio":"threads",
+                      "auto-read-only":true, "discard":"unmap",
+                      "detect-zeroes":"unmap"}}
+{"return": {}}
+{"execute":"blockdev-mirror", "arguments":
+                     {"sync":"full", "device":"src", "target":"dst",
+                      "job-id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job2"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "ready", "id": "job2"}}
+{"execute": "job-complete", "arguments":
+               {"id":"job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"return": {}}
+{"execute": "blockdev-del", "arguments":
+                {"node-name": "dst"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "job2", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job2"}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job2"}}
+{"return": {}}
+Images are identical.
+Destination is sparse; expected sparse
+{"execute":"quit"}
+*** done