qapi event: convert other BLOCK_JOB events

Since BLOCK_JOB_COMPLETED, BLOCK_JOB_CANCELLED, BLOCK_JOB_READY are
related, convert them in one patch. The block_job_event_* functions
are used to keep encapsulation of BlockJob structure.

Signed-off-by: Wenchao Xia <wenchaoqemu@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

block/mirror.c

@@ -427,7 +427,7 @@ static void coroutine_fn mirror_run(void *opaque)
                  */
                 s->common.offset = end * BDRV_SECTOR_SIZE;
                 if (!s->synced) {
-                    block_job_ready(&s->common);
+                    block_job_event_ready(&s->common);
                     s->synced = true;
                 }
 

blockdev.c

@@ -1847,23 +1847,21 @@ void qmp_block_resize(bool has_device, const char *device,
 static void block_job_cb(void *opaque, int ret)
 {
     BlockDriverState *bs = opaque;
-    QObject *obj;
+    const char *msg = NULL;
 
     trace_block_job_cb(bs, bs->job, ret);
 
     assert(bs->job);
-    obj = qobject_from_block_job(bs->job);
+
     if (ret < 0) {
-        QDict *dict = qobject_to_qdict(obj);
-        qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
+        msg = strerror(-ret);
     }
 
     if (block_job_is_cancelled(bs->job)) {
-        monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj);
+        block_job_event_cancelled(bs->job);
     } else {
-        monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj);
+        block_job_event_completed(bs->job, msg);
     }
-    qobject_decref(obj);
 
     bdrv_put_ref_bh_schedule(bs);
 }

blockjob.c

@@ -26,7 +26,6 @@
 #include "config-host.h"
 #include "qemu-common.h"
 #include "trace.h"
-#include "monitor/monitor.h"
 #include "block/block.h"
 #include "block/blockjob.h"
 #include "block/block_int.h"
@@ -233,26 +232,31 @@ static void block_job_iostatus_set_err(BlockJob *job, int error)
     }
 }
 
-
-QObject *qobject_from_block_job(BlockJob *job)
+void block_job_event_cancelled(BlockJob *job)
 {
-    return qobject_from_jsonf("{ 'type': %s,"
-                              "'device': %s,"
-                              "'len': %" PRId64 ","
-                              "'offset': %" PRId64 ","
-                              "'speed': %" PRId64 " }",
-                              BlockJobType_lookup[job->driver->job_type],
-                              bdrv_get_device_name(job->bs),
-                              job->len,
-                              job->offset,
-                              job->speed);
+    qapi_event_send_block_job_cancelled(job->driver->job_type,
+                                        bdrv_get_device_name(job->bs),
+                                        job->len,
+                                        job->offset,
+                                        job->speed,
+                                        &error_abort);
 }
 
-void block_job_ready(BlockJob *job)
+void block_job_event_completed(BlockJob *job, const char *msg)
 {
-    QObject *data = qobject_from_block_job(job);
-    monitor_protocol_event(QEVENT_BLOCK_JOB_READY, data);
-    qobject_decref(data);
+    qapi_event_send_block_job_completed(job->driver->job_type,
+                                        bdrv_get_device_name(job->bs),
+                                        job->len,
+                                        job->offset,
+                                        job->speed,
+                                        !!msg,
+                                        msg,
+                                        &error_abort);
+}
+
+void block_job_event_ready(BlockJob *job)
+{
+    qapi_event_send_block_job_ready(bdrv_get_device_name(job->bs), &error_abort);
 }
 
 BlockErrorAction block_job_error_action(BlockJob *job, BlockDriverState *bs,

docs/qmp/qmp-events.txt

@@ -28,77 +28,6 @@ Example:
     "data": { "actual": 944766976 },
     "timestamp": { "seconds": 1267020223, "microseconds": 435656 } }
 
-BLOCK_JOB_CANCELLED
--------------------
-
-Emitted when a block job has been cancelled.
-
-Data:
-
-- "type":     Job type (json-string; "stream" for image streaming
-                                     "commit" for block commit)
-- "device":   Device name (json-string)
-- "len":      Maximum progress value (json-int)
-- "offset":   Current progress value (json-int)
-              On success this is equal to len.
-              On failure this is less than len.
-- "speed":    Rate limit, bytes per second (json-int)
-
-Example:
-
-{ "event": "BLOCK_JOB_CANCELLED",
-     "data": { "type": "stream", "device": "virtio-disk0",
-               "len": 10737418240, "offset": 134217728,
-               "speed": 0 },
-     "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }
-
-BLOCK_JOB_COMPLETED
--------------------
-
-Emitted when a block job has completed.
-
-Data:
-
-- "type":     Job type (json-string; "stream" for image streaming
-                                     "commit" for block commit)
-- "device":   Device name (json-string)
-- "len":      Maximum progress value (json-int)
-- "offset":   Current progress value (json-int)
-              On success this is equal to len.
-              On failure this is less than len.
-- "speed":    Rate limit, bytes per second (json-int)
-- "error":    Error message (json-string, optional)
-              Only present on failure.  This field contains a human-readable
-              error message.  There are no semantics other than that streaming
-              has failed and clients should not try to interpret the error
-              string.
-
-Example:
-
-{ "event": "BLOCK_JOB_COMPLETED",
-     "data": { "type": "stream", "device": "virtio-disk0",
-               "len": 10737418240, "offset": 10737418240,
-               "speed": 0 },
-     "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }
-
-BLOCK_JOB_READY
----------------
-
-Emitted when a block job is ready to complete.
-
-Data:
-
-- "device": device name (json-string)
-
-Example:
-
-{ "event": "BLOCK_JOB_READY",
-    "data": { "device": "ide0-hd1" },
-    "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
-
-Note: The "ready to complete" status is always reset by a BLOCK_JOB_ERROR
-event.
-
 GUEST_PANICKED
 --------------
 

include/block/blockjob.h

@@ -217,12 +217,21 @@ void block_job_pause(BlockJob *job);
 void block_job_resume(BlockJob *job);
 
 /**
- * qobject_from_block_job:
+ * block_job_event_cancle:
  * @job: The job whose information is requested.
  *
- * Return a QDict corresponding to @job's query-block-jobs entry.
+ * Send a BLOCK_JOB_CANCELLED event for the specified job.
  */
-QObject *qobject_from_block_job(BlockJob *job);
+void block_job_event_cancelled(BlockJob *job);
+
+/**
+ * block_job_ready:
+ * @job: The job which is now ready to complete.
+ * @msg: Error message. Only present on failure.
+ *
+ * Send a BLOCK_JOB_COMPLETED event for the specified job.
+ */
+void block_job_event_completed(BlockJob *job, const char *msg);
 
 /**
  * block_job_ready:
@@ -230,7 +239,7 @@ QObject *qobject_from_block_job(BlockJob *job);
  *
  * Send a BLOCK_JOB_READY event for the specified job.
  */
-void block_job_ready(BlockJob *job);
+void block_job_event_ready(BlockJob *job);
 
 /**
  * block_job_is_paused:

qapi/block-core.json

@@ -1472,6 +1472,62 @@
   'data': { 'device': 'str', 'operation': 'IoOperationType',
             'action': 'BlockErrorAction' } }
 
+##
+# @BLOCK_JOB_COMPLETED
+#
+# Emitted when a block job has completed
+#
+# @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
+#
+# @error: #optional, error message. Only present on failure. This field
+#         contains a human-readable error message. There are no semantics
+#         other than that streaming has failed and clients should not try to
+#         interpret the error string
+#
+# Since: 1.1
+##
+{ 'event': 'BLOCK_JOB_COMPLETED',
+  'data': { 'type'  : 'BlockJobType',
+            'device': 'str',
+            'len'   : 'int',
+            'offset': 'int',
+            'speed' : 'int',
+            '*error': 'str' } }
+
+##
+# @BLOCK_JOB_CANCELLED
+#
+# Emitted when a block job has been cancelled
+#
+# @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
+#
+# Since: 1.1
+##
+{ 'event': 'BLOCK_JOB_CANCELLED',
+  'data': { 'type'  : 'BlockJobType',
+            'device': 'str',
+            'len'   : 'int',
+            'offset': 'int',
+            'speed' : 'int' } }
+
 ##
 # @BLOCK_JOB_ERROR
 #
@@ -1489,3 +1545,18 @@
   'data': { 'device'   : 'str',
             'operation': 'IoOperationType',
             'action'   : 'BlockdevOnError' } }
+
+##
+# @BLOCK_JOB_READY
+#
+# Emitted when a block job is ready to complete
+#
+# @device: device name
+#
+# 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' } }