[RFC 07/15] qapi: add job-change

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Add a new-style command job-change, doing same thing as
block-job-change. The aim is finally deprecate block-job-* APIs and
move to job-* APIs.

We add a new command to qapi/block-core.json, not to
qapi/job.json to avoid resolving json file including loops for now.
This all would be a lot simple to refactor when we finally drop
deprecated block-job-* APIs.

@type argument of the new command immediately becomes deprecated.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@xxxxxxxxxxxxxx>
---
 docs/about/deprecated.rst |  4 ++--
 job-qmp.c                 | 14 ++++++++++++++
 qapi/block-core.json      | 10 ++++++++++
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
index 64981e5e4a..5ff98ef95f 100644
--- a/docs/about/deprecated.rst
+++ b/docs/about/deprecated.rst
@@ -143,8 +143,8 @@ all arguments passed to ``device_add`` are consistent with the documented
 property types.
 
 
-``block-job-change`` argument ``type`` (since 9.1)
-''''''''''''''''''''''''''''''''''''''''''''''''''
+``block-job-change`` and ``job-change``  argument ``type`` (since 9.1)
+''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
 
 QEMU can get job type from the job itself (by @id), @type field is redundant.
 
diff --git a/job-qmp.c b/job-qmp.c
index abe9b59487..011a8736ea 100644
--- a/job-qmp.c
+++ b/job-qmp.c
@@ -141,6 +141,20 @@ void qmp_job_dismiss(const char *id, Error **errp)
     job_dismiss_locked(&job, errp);
 }
 
+void qmp_job_change(JobChangeOptions *opts, Error **errp)
+{
+    Job *job;
+
+    JOB_LOCK_GUARD();
+    job = find_job_locked(opts->id, errp);
+
+    if (!job) {
+        return;
+    }
+
+    job_change_locked(job, opts, errp);
+}
+
 /* Called with job_mutex held. */
 static JobInfo *job_query_single_locked(Job *job, Error **errp)
 {
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 3d890dfcd0..f5cefa441b 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -3105,6 +3105,16 @@
 { 'command': 'block-job-change',
   'data': 'JobChangeOptions', 'boxed': true }
 
+##
+# @job-change:
+#
+# Change the block job's options.
+#
+# Since: 9.1
+##
+{ 'command': 'job-change',
+  'data': 'JobChangeOptions', 'boxed': true }
+
 ##
 # @BlockdevDiscardOptions:
 #
-- 
2.34.1
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