sysbus: remove outdated comment

[qemu.git] / qdev-monitor.c

diff --git a/qdev-monitor.c b/qdev-monitor.c
index 148df9cacfe319e4d9cd46c918b6e2fa67dae4d0..3465a1e2d02834a9723bc493212283c0e233fd28 100644 (file)
--- a/qdev-monitor.c
+++ b/qdev-monitor.c
@@ -32,9 +32,11 @@
 #include "qemu/help_option.h"
 #include "qemu/option.h"
 #include "qemu/qemu-print.h"
+#include "qemu/option_int.h"
 #include "sysemu/block-backend.h"
 #include "sysemu/sysemu.h"
 #include "migration/misc.h"
+#include "migration/migration.h"
 
 /*
  * Aliases were a bad idea from the start.  Let's keep them
@@ -326,7 +328,8 @@ static Object *qdev_get_peripheral_anon(void)
     return dev;
 }
 
-static void qbus_list_bus(DeviceState *dev, Error **errp)
+static void qbus_error_append_bus_list_hint(DeviceState *dev,
+                                            Error *const *errp)
 {
     BusState *child;
     const char *sep = " ";
@@ -340,7 +343,8 @@ static void qbus_list_bus(DeviceState *dev, Error **errp)
     error_append_hint(errp, "\n");
 }
 
-static void qbus_list_dev(BusState *bus, Error **errp)
+static void qbus_error_append_dev_list_hint(BusState *bus,
+                                            Error *const *errp)
 {
     BusChild *kid;
     const char *sep = " ";
@@ -498,7 +502,7 @@ static BusState *qbus_find(const char *path, Error **errp)
         if (!dev) {
             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
                       "Device '%s' not found", elem);
-            qbus_list_dev(bus, errp);
+            qbus_error_append_dev_list_hint(bus, errp);
             return NULL;
         }
 
@@ -516,7 +520,7 @@ static BusState *qbus_find(const char *path, Error **errp)
             if (dev->num_child_bus) {
                 error_setg(errp, "Device '%s' has multiple child buses",
                            elem);
-                qbus_list_bus(dev, errp);
+                qbus_error_append_bus_list_hint(dev, errp);
             } else {
                 error_setg(errp, "Device '%s' has no child bus", elem);
             }
@@ -532,7 +536,7 @@ static BusState *qbus_find(const char *path, Error **errp)
         bus = qbus_find_bus(dev, elem);
         if (!bus) {
             error_setg(errp, "Bus '%s' not found", elem);
-            qbus_list_bus(dev, errp);
+            qbus_error_append_bus_list_hint(dev, errp);
             return NULL;
         }
     }
@@ -562,13 +566,36 @@ void qdev_set_id(DeviceState *dev, const char *id)
     }
 }
 
+static int is_failover_device(void *opaque, const char *name, const char *value,
+                        Error **errp)
+{
+    if (strcmp(name, "failover_pair_id") == 0) {
+        QemuOpts *opts = (QemuOpts *)opaque;
+
+        if (qdev_should_hide_device(opts)) {
+            return 1;
+        }
+    }
+
+    return 0;
+}
+
+static bool should_hide_device(QemuOpts *opts)
+{
+    if (qemu_opt_foreach(opts, is_failover_device, opts, NULL) == 0) {
+        return false;
+    }
+    return true;
+}
+
 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 {
     DeviceClass *dc;
     const char *driver, *path;
-    DeviceState *dev;
+    DeviceState *dev = NULL;
     BusState *bus = NULL;
     Error *err = NULL;
+    bool hide;
 
     driver = qemu_opt_get(opts, "driver");
     if (!driver) {
@@ -602,11 +629,17 @@ DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
             return NULL;
         }
     }
-    if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
+    hide = should_hide_device(opts);
+
+    if ((hide || qdev_hotplug) && bus && !qbus_is_hotpluggable(bus)) {
         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
         return NULL;
     }
 
+    if (hide) {
+        return NULL;
+    }
+
     if (!migration_is_idle()) {
         error_setg(errp, "device_add not allowed while migrating");
         return NULL;
@@ -648,8 +681,10 @@ DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 
 err_del_dev:
     error_propagate(errp, err);
-    object_unparent(OBJECT(dev));
-    object_unref(OBJECT(dev));
+    if (dev) {
+        object_unparent(OBJECT(dev));
+        object_unref(OBJECT(dev));
+    }
     return NULL;
 }
 
@@ -818,7 +853,7 @@ void qdev_unplug(DeviceState *dev, Error **errp)
         return;
     }
 
-    if (!migration_is_idle()) {
+    if (!migration_is_idle() && !dev->allow_unplug_during_migration) {
         error_setg(errp, "device_del not allowed while migrating");
         return;
     }
@@ -857,7 +892,7 @@ void hmp_device_add(Monitor *mon, const QDict *qdict)
     Error *err = NULL;
 
     qmp_device_add((QDict *)qdict, NULL, &err);
-    hmp_handle_error(mon, &err);
+    hmp_handle_error(mon, err);
 }
 
 void hmp_device_del(Monitor *mon, const QDict *qdict)
@@ -866,7 +901,7 @@ void hmp_device_del(Monitor *mon, const QDict *qdict)
     Error *err = NULL;
 
     qmp_device_del(id, &err);
-    hmp_handle_error(mon, &err);
+    hmp_handle_error(mon, err);
 }
 
 BlockBackend *blk_by_qdev_id(const char *id, Error **errp)