blockjob: Fix recent BLOCK_JOB_READY regression

Commit bcada37b dropped the (up to now undocumented) members type, len,
offset, speed, breaking tests/qemu-iotests/040 and 041.

Restore and document them.  This fixes 040, and partially fixes 041.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Tested-By: NBenoit Canet <benoit@irqsave.net>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

blockjob.c

@@ -270,7 +270,11 @@ void block_job_event_completed(BlockJob *job, const char *msg)
 
 void block_job_event_ready(BlockJob *job)
 {
-    qapi_event_send_block_job_ready(bdrv_get_device_name(job->bs), &error_abort);
+    qapi_event_send_block_job_ready(job->driver->job_type,
+                                    bdrv_get_device_name(job->bs),
+                                    job->len,
+                                    job->offset,
+                                    job->speed, &error_abort);
 }
 
 BlockErrorAction block_job_error_action(BlockJob *job, BlockDriverState *bs,

qapi/block-core.json

@@ -1558,12 +1558,25 @@
 #
 # Emitted when a block job is ready to complete
 #
+# @type: job type
+#
 # @device: device name
 #
+# @len: maximum progress value
+#
+# @offset: current progress value. On success this is equal to len.
+#          On failure this is less than len
+#
+# @speed: rate limit, bytes per second
+#
 # Note: The "ready to complete" status is always reset by a @BLOCK_JOB_ERROR
 # event
 #
 # Since: 1.3
 ##
 { 'event': 'BLOCK_JOB_READY',
-  'data': { 'device': 'str' } }
+  'data': { 'type'  : 'BlockJobType',
+            'device': 'str',
+            'len'   : 'int',
+            'offset': 'int',
+            'speed' : 'int' } }