qdev: Make DeviceState.id independent of QemuOpts

DeviceState.id is a pointer to a string that is stored in the QemuOpts
object DeviceState.opts and freed together with it. We want to create
devices without going through QemuOpts in the future, so make this a
separately allocated string.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20211008133442.141332-9-kwolf@redhat.com>
Reviewed-by: Damien Hedde <damien.hedde@greensocs.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 7170aaacd5be3ac9adbac276e28499461d57d656..4160d49688c8970339ca63e68fb973292df18882 100644 (file)
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1459,7 +1459,7 @@ static void create_platform_bus(VirtMachineState *vms)
     MemoryRegion *sysmem = get_system_memory();
 
     dev = qdev_new(TYPE_PLATFORM_BUS_DEVICE);
-    dev->id = TYPE_PLATFORM_BUS_DEVICE;
+    dev->id = g_strdup(TYPE_PLATFORM_BUS_DEVICE);
     qdev_prop_set_uint32(dev, "num_irqs", PLATFORM_BUS_NUM_IRQS);
     qdev_prop_set_uint32(dev, "mmio_size", vms->memmap[VIRT_PLATFORM_BUS].size);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);

diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index cefc5eaa0a928802507af9bc54ae69a60da965e0..d918b50a1da06b17ff06579875dccbb80ecb57c5 100644 (file)
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -956,6 +956,7 @@ static void device_finalize(Object *obj)
     }
 
     qemu_opts_del(dev->opts);
+    g_free(dev->id);
 }
 
 static void device_class_base_init(ObjectClass *class, void *data)

diff --git a/hw/pci-bridge/pci_expander_bridge.c b/hw/pci-bridge/pci_expander_bridge.c
index 7112dc30623e264f4554fde2ad43f66fa9787a0f..10e6e7c2ab0bd4f4c04a4f4cc38ca7470c034f25 100644 (file)
--- a/hw/pci-bridge/pci_expander_bridge.c
+++ b/hw/pci-bridge/pci_expander_bridge.c
@@ -245,7 +245,7 @@ static void pxb_dev_realize_common(PCIDevice *dev, bool pcie, Error **errp)
     } else {
         bus = pci_root_bus_new(ds, "pxb-internal", NULL, NULL, 0, TYPE_PXB_BUS);
         bds = qdev_new("pci-bridge");
-        bds->id = dev_name;
+        bds->id = g_strdup(dev_name);
         qdev_prop_set_uint8(bds, PCI_BRIDGE_DEV_PROP_CHASSIS_NR, pxb->bus_nr);
         qdev_prop_set_bit(bds, PCI_BRIDGE_DEV_PROP_SHPC, false);
     }

diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
index 95451414dd22614737ed0030a740e5ab281a3176..960e7efcd31fe56232f47cefc7aceabac4e6039a 100644 (file)
--- a/hw/ppc/e500.c
+++ b/hw/ppc/e500.c
@@ -1006,7 +1006,7 @@ void ppce500_init(MachineState *machine)
     /* Platform Bus Device */
     if (pmc->has_platform_bus) {
         dev = qdev_new(TYPE_PLATFORM_BUS_DEVICE);
-        dev->id = TYPE_PLATFORM_BUS_DEVICE;
+        dev->id = g_strdup(TYPE_PLATFORM_BUS_DEVICE);
         qdev_prop_set_uint32(dev, "num_irqs", pmc->platform_bus_num_irqs);
         qdev_prop_set_uint32(dev, "mmio_size", pmc->platform_bus_size);
         sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);

diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 4ff19c714bd8ccb3b595ea18c9bfaafdceea8e7f..5a073fc3686dbf61f118a6638ce92ce6ee29c493 100644 (file)
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -176,7 +176,7 @@ struct DeviceState {
     Object parent_obj;
     /*< public >*/
 
-    const char *id;
+    char *id;
     char *canonical_path;
     bool realized;
     bool pending_deleted_event;

diff --git a/include/monitor/qdev.h b/include/monitor/qdev.h
index eaa947d73a3ca9f301d124ae7585a81d2e2659d4..389287eb44af4ffecee63cd59b9943d80205137b 100644 (file)
--- a/include/monitor/qdev.h
+++ b/include/monitor/qdev.h
@@ -9,6 +9,6 @@ void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp);
 
 int qdev_device_help(QemuOpts *opts);
 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp);
-void qdev_set_id(DeviceState *dev, const char *id);
+void qdev_set_id(DeviceState *dev, char *id);
 
 #endif

diff --git a/softmmu/qdev-monitor.c b/softmmu/qdev-monitor.c
index 672f87ed4fc0e804fda4ca96673ee97a0b51e1fc..b7c2d6920768145297061606f45ae1b1e0b86eb0 100644 (file)
--- a/softmmu/qdev-monitor.c
+++ b/softmmu/qdev-monitor.c
@@ -592,7 +592,8 @@ static BusState *qbus_find(const char *path, Error **errp)
     return bus;
 }
 
-void qdev_set_id(DeviceState *dev, const char *id)
+/* Takes ownership of @id, will be freed when deleting the device */
+void qdev_set_id(DeviceState *dev, char *id)
 {
     if (id) {
         dev->id = id;
@@ -690,7 +691,7 @@ DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
         }
     }
 
-    qdev_set_id(dev, qemu_opts_id(opts));
+    qdev_set_id(dev, g_strdup(qemu_opts_id(opts)));
 
     /* set properties */
     if (qemu_opt_foreach(opts, set_property, dev, errp)) {