qemu: monitor: Remove JSON impls of drive_add and drive_del

qemu won't ever add those functions directly to QMP. They will be
replaced with 'blockdev-add' and 'blockdev-del' eventually. At this time
there's no need to keep the stubs around.

Additionally the drive_del stub in JSON contained dead code in the
attempt to report errors. (VIR_ERR_OPERATION_UNSUPPORTED was never
reported). Since the text impl does have the same message it is reported
anyways.

src/qemu/qemu_monitor.c

@@ -2797,6 +2797,13 @@ qemuMonitorGetAllPCIAddresses(qemuMonitorPtr mon,
 }
 
 
+/**
+ * qemuMonitorDriveDel:
+ * @mon: monitor object
+ * @drivestr: identifier of drive to delete.
+ *
+ * Attempts to remove a host drive.
+ * Returns 1 if unsupported, 0 if ok, and -1 on other failure */
 int
 qemuMonitorDriveDel(qemuMonitorPtr mon,
                     const char *drivestr)
@@ -2805,10 +2812,8 @@ qemuMonitorDriveDel(qemuMonitorPtr mon,
 
     QEMU_CHECK_MONITOR(mon);
 
-    if (mon->json)
-        return qemuMonitorJSONDriveDel(mon, drivestr);
-    else
-        return qemuMonitorTextDriveDel(mon, drivestr);
+    /* there won't be a direct replacement for drive_del in QMP */
+    return qemuMonitorTextDriveDel(mon, drivestr);
 }
 
 
@@ -2911,10 +2916,8 @@ qemuMonitorAddDrive(qemuMonitorPtr mon,
 
     QEMU_CHECK_MONITOR(mon);
 
-    if (mon->json)
-        return qemuMonitorJSONAddDrive(mon, drivestr);
-    else
-        return qemuMonitorTextAddDrive(mon, drivestr);
+    /* there won't ever be a direct QMP replacement for this function */
+    return qemuMonitorTextAddDrive(mon, drivestr);
 }
 
 

src/qemu/qemu_monitor_json.c

@@ -3583,35 +3583,6 @@ int qemuMonitorJSONDelObject(qemuMonitorPtr mon,
 }
 
 
-int qemuMonitorJSONAddDrive(qemuMonitorPtr mon,
-                            const char *drivestr)
-{
-    /* XXX Update to use QMP, if QMP ever adds support for drive_add */
-    VIR_DEBUG("drive_add command not found, trying HMP");
-    return qemuMonitorTextAddDrive(mon, drivestr);
-}
-
-
-int qemuMonitorJSONDriveDel(qemuMonitorPtr mon,
-                            const char *drivestr)
-{
-    int ret;
-
-    /* XXX Update to use QMP, if QMP ever adds support for drive_del */
-    VIR_DEBUG("drive_del command not found, trying HMP");
-    if ((ret = qemuMonitorTextDriveDel(mon, drivestr)) < 0) {
-        virErrorPtr err = virGetLastError();
-        if (err && err->code == VIR_ERR_OPERATION_UNSUPPORTED) {
-            VIR_ERROR("%s",
-                      _("deleting disk is not supported.  "
-                        "This may leak data if disk is reassigned"));
-            ret = 1;
-            virResetLastError();
-        }
-    }
-    return ret;
-}
-
 int qemuMonitorJSONSetDrivePassphrase(qemuMonitorPtr mon,
                                       const char *alias,
                                       const char *passphrase)

src/qemu/qemu_monitor_json.h

@@ -230,12 +230,6 @@ int qemuMonitorJSONAddObject(qemuMonitorPtr mon,
 int qemuMonitorJSONDelObject(qemuMonitorPtr mon,
                              const char *objalias);
 
-int qemuMonitorJSONAddDrive(qemuMonitorPtr mon,
-                            const char *drivestr);
-
-int qemuMonitorJSONDriveDel(qemuMonitorPtr mon,
-                            const char *drivestr);
-
 int qemuMonitorJSONSetDrivePassphrase(qemuMonitorPtr mon,
                                       const char *alias,
                                       const char *passphrase);

src/qemu/qemu_monitor_text.c

@@ -2454,8 +2454,7 @@ int qemuMonitorTextAddDrive(qemuMonitorPtr mon,
     return ret;
 }
 
-/* Attempts to remove a host drive.
- * Returns 1 if unsupported, 0 if ok, and -1 on other failure */
+
 int qemuMonitorTextDriveDel(qemuMonitorPtr mon,
                             const char *drivestr)
 {
@@ -2463,7 +2462,6 @@ int qemuMonitorTextDriveDel(qemuMonitorPtr mon,
     char *reply = NULL;
     char *safedev;
     int ret = -1;
-    VIR_DEBUG("TextDriveDel drivestr=%s", drivestr);
 
     if (!(safedev = qemuMonitorEscapeArg(drivestr)))
         goto cleanup;