job: Create Job, JobDriver and job_create()

This is the first step towards creating an infrastructure for generic
background jobs that aren't tied to a block device. For now, Job only
stores its ID and JobDriver, the rest stays in BlockJob.

The following patches will move over more parts of BlockJob to Job if
they are meaningful outside the context of a block job.

BlockJob.driver is now redundant, but this patch leaves it around to
avoid unnecessary churn. The next patches will get rid of almost all of
its uses anyway so that it can be removed later with much less churn.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>

3 files changed, 14 insertions, 6 deletions

diff --git a/tests/test-bdrv-drain.c b/tests/test-bdrv-drain.c
index 7673de1062..fe9f412b39 100644
--- a/tests/test-bdrv-drain.c
+++ b/tests/test-bdrv-drain.c
@@ -520,7 +520,9 @@ static void test_job_complete(BlockJob *job, Error **errp)
 }
 
 BlockJobDriver test_job_driver = {
-    .instance_size  = sizeof(TestBlockJob),
+    .job_driver = {
+        .instance_size  = sizeof(TestBlockJob),
+    },
     .start          = test_job_start,
     .complete       = test_job_complete,
 };
diff --git a/tests/test-blockjob-txn.c b/tests/test-blockjob-txn.c
index 5789893dda..48b12d1744 100644
--- a/tests/test-blockjob-txn.c
+++ b/tests/test-blockjob-txn.c
@@ -74,7 +74,9 @@ static void test_block_job_cb(void *opaque, int ret)
 }
 
 static const BlockJobDriver test_block_job_driver = {
-    .instance_size = sizeof(TestBlockJob),
+    .job_driver = {
+        .instance_size = sizeof(TestBlockJob),
+    },
     .start = test_block_job_run,
 };
 
diff --git a/tests/test-blockjob.c b/tests/test-blockjob.c
index 8946bfd37b..b82026180a 100644
--- a/tests/test-blockjob.c
+++ b/tests/test-blockjob.c
@@ -17,7 +17,9 @@
 #include "sysemu/block-backend.h"
 
 static const BlockJobDriver test_block_job_driver = {
-    .instance_size = sizeof(BlockJob),
+    .job_driver = {
+        .instance_size = sizeof(BlockJob),
+    },
 };
 
 static void block_job_cb(void *opaque, int ret)
@@ -38,9 +40,9 @@ static BlockJob *mk_job(BlockBackend *blk, const char *id,
         g_assert_null(errp);
         g_assert_nonnull(job);
         if (id) {
-            g_assert_cmpstr(job->id, ==, id);
+            g_assert_cmpstr(job->job.id, ==, id);
         } else {
-            g_assert_cmpstr(job->id, ==, blk_name(blk));
+            g_assert_cmpstr(job->job.id, ==, blk_name(blk));
         }
     } else {
         g_assert_nonnull(errp);
@@ -192,7 +194,9 @@ static void coroutine_fn cancel_job_start(void *opaque)
 }
 
 static const BlockJobDriver test_cancel_driver = {
-    .instance_size = sizeof(CancelJob),
+    .job_driver = {
+        .instance_size = sizeof(CancelJob),
+    },
     .start         = cancel_job_start,
     .complete      = cancel_job_complete,
 };