qemu: blockjob: Separate and unify block job (un)registration

Rename and move qemuBlockJobTerminate to qemuBlockJobUnregister and
separate bits from qemuBlockJobDiskNew which register the job with the
disk. This creates an unified interface for other APIs to use.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_blockjob.c

@@ -92,6 +92,37 @@ qemuBlockJobDataNew(qemuBlockJobType type,
 }
 
 
+static int
+qemuBlockJobRegister(qemuBlockJobDataPtr job,
+                     virDomainDiskDefPtr disk)
+{
+    if (disk) {
+        job->disk = disk;
+        QEMU_DOMAIN_DISK_PRIVATE(disk)->blockjob = virObjectRef(job);
+    }
+
+    return 0;
+}
+
+
+static void
+qemuBlockJobUnregister(qemuBlockJobDataPtr job)
+{
+    qemuDomainDiskPrivatePtr diskPriv;
+
+    if (job->disk) {
+        diskPriv = QEMU_DOMAIN_DISK_PRIVATE(job->disk);
+
+        if (job == diskPriv->blockjob) {
+            virObjectUnref(diskPriv->blockjob);
+            diskPriv->blockjob = NULL;
+        }
+
+        job->disk = NULL;
+    }
+}
+
+
 /**
  * qemuBlockJobDiskNew:
  * @disk: disk definition
@@ -105,16 +136,15 @@ qemuBlockJobDiskNew(virDomainDiskDefPtr disk,
                     qemuBlockJobType type,
                     const char *jobname)
 {
-    qemuBlockJobDataPtr job = NULL;
+    VIR_AUTOUNREF(qemuBlockJobDataPtr) job = NULL;
 
     if (!(job = qemuBlockJobDataNew(type, jobname)))
         return NULL;
 
-    job->disk = disk;
-    if (disk)
-        QEMU_DOMAIN_DISK_PRIVATE(disk)->blockjob = virObjectRef(job);
+    if (qemuBlockJobRegister(job, disk) < 0)
+        return NULL;
 
-    return job;
+    VIR_RETURN_PTR(job);
 }
 
 
@@ -150,22 +180,6 @@ qemuBlockJobStarted(qemuBlockJobDataPtr job)
 }
 
 
-static void
-qemuBlockJobTerminate(qemuBlockJobDataPtr job)
-{
-    qemuDomainDiskPrivatePtr diskPriv;
-
-    if (job->disk) {
-        diskPriv = QEMU_DOMAIN_DISK_PRIVATE(job->disk);
-
-        if (job == diskPriv->blockjob) {
-            virObjectUnref(diskPriv->blockjob);
-            diskPriv->blockjob = NULL;
-        }
-    }
-}
-
-
 /**
  * qemuBlockJobStartupFinalize:
  * @job: job being started
@@ -181,7 +195,7 @@ qemuBlockJobStartupFinalize(qemuBlockJobDataPtr job)
         return;
 
     if (job->state == QEMU_BLOCKJOB_STATE_NEW)
-        qemuBlockJobTerminate(job);
+        qemuBlockJobUnregister(job);
 
     virObjectUnref(job);
 }
@@ -300,7 +314,7 @@ qemuBlockJobEventProcessLegacyCompleted(virQEMUDriverPtr driver,
     virStorageSourceBackingStoreClear(disk->src);
     ignore_value(qemuDomainDetermineDiskChain(driver, vm, disk, NULL, true));
     ignore_value(qemuBlockNodeNamesDetect(driver, vm, asyncJob));
-    qemuBlockJobTerminate(job);
+    qemuBlockJobUnregister(job);
 }
 
 
@@ -355,7 +369,7 @@ qemuBlockJobEventProcessLegacy(virQEMUDriverPtr driver,
         }
         disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_NONE;
         disk->mirrorJob = VIR_DOMAIN_BLOCK_JOB_TYPE_UNKNOWN;
-        qemuBlockJobTerminate(job);
+        qemuBlockJobUnregister(job);
         break;
 
     case VIR_DOMAIN_BLOCK_JOB_LAST: