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https://gitlab.com/qemu-project/qemu
synced 2024-09-06 01:43:39 +00:00
qdev: remove baked in notion of aliases (v2)
Limit them to the device_add functionality. Device aliases were a hack based on the fact that virtio was modeled the wrong way. The mechanism for aliasing is very limited in that only one alias can exist for any device. We have to support it for the purposes of compatibility but we only need to support it in device_add so restrict it to that piece of code. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> --- v1 -> v2 - Use a table for aliases (Paolo)
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d307af795d
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6acbe4c6f1
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@ -158,7 +158,6 @@ static void ich_ahci_class_init(ObjectClass *klass, void *data)
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k->device_id = PCI_DEVICE_ID_INTEL_82801IR;
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k->revision = 0x02;
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k->class_id = PCI_CLASS_STORAGE_SATA;
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dc->alias = "ahci";
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dc->vmsd = &vmstate_ahci;
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}
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@ -172,6 +171,5 @@ static TypeInfo ich_ahci_info = {
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static void ich_ahci_register(void)
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{
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type_register_static(&ich_ahci_info);
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type_register_static_alias(&ich_ahci_info, "ahci");
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}
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device_init(ich_ahci_register);
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@ -2131,7 +2131,6 @@ static void lsi_class_init(ObjectClass *klass, void *data)
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k->device_id = PCI_DEVICE_ID_LSI_53C895A;
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k->class_id = PCI_CLASS_STORAGE_SCSI;
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k->subsystem_id = 0x1000;
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dc->alias = "lsi";
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dc->reset = lsi_scsi_reset;
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dc->vmsd = &vmstate_lsi_scsi;
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}
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@ -2146,7 +2145,6 @@ static TypeInfo lsi_info = {
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static void lsi53c895a_register_devices(void)
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{
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type_register_static(&lsi_info);
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type_register_static_alias(&lsi_info, "lsi");
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}
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device_init(lsi53c895a_register_devices);
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93
hw/qdev.c
93
hw/qdev.c
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@ -61,14 +61,56 @@ Property *qdev_get_props(DeviceState *dev)
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return dc->props;
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}
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/*
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* Aliases were a bad idea from the start. Let's keep them
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* from spreading further.
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*/
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typedef struct QDevAlias
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{
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const char *typename;
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const char *alias;
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} QDevAlias;
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static const QDevAlias qdev_alias_table[] = {
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{ "virtio-blk-pci", "virtio-blk" },
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{ "virtio-net-pci", "virtio-net" },
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{ "virtio-serial-pci", "virtio-serial" },
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{ "virtio-balloon-pci", "virtio-balloon" },
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{ "virtio-blk-s390", "virtio-blk" },
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{ "virtio-net-s390", "virtio-net" },
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{ "virtio-serial-s390", "virtio-serial" },
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{ "lsi53c895a", "lsi" },
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{ "ich9-ahci", "ahci" },
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{ }
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};
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static const char *qdev_class_get_alias(DeviceClass *dc)
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{
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const char *typename = object_class_get_name(OBJECT_CLASS(dc));
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int i;
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for (i = 0; qdev_alias_table[i].typename; i++) {
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if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
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return qdev_alias_table[i].alias;
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}
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}
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return NULL;
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}
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static bool qdev_class_has_alias(DeviceClass *dc)
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{
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return (qdev_class_get_alias(dc) != NULL);
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}
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const char *qdev_fw_name(DeviceState *dev)
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{
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DeviceClass *dc = DEVICE_GET_CLASS(dev);
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if (dc->fw_name) {
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return dc->fw_name;
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} else if (dc->alias) {
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return dc->alias;
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} else if (qdev_class_has_alias(dc)) {
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return qdev_class_get_alias(dc);
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}
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return object_get_typename(OBJECT(dev));
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@ -161,8 +203,8 @@ static void qdev_print_devinfo(ObjectClass *klass, void *opaque)
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if (dc->bus_info) {
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error_printf(", bus %s", dc->bus_info->name);
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}
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if (dc->alias) {
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error_printf(", alias \"%s\"", dc->alias);
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if (qdev_class_has_alias(dc)) {
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error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
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}
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if (dc->desc) {
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error_printf(", desc \"%s\"", dc->desc);
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@ -188,6 +230,19 @@ static int set_property(const char *name, const char *value, void *opaque)
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return 0;
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}
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static const char *find_typename_by_alias(const char *alias)
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{
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int i;
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for (i = 0; qdev_alias_table[i].alias; i++) {
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if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
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return qdev_alias_table[i].typename;
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}
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}
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return NULL;
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}
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int qdev_device_help(QemuOpts *opts)
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{
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const char *driver;
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@ -207,6 +262,15 @@ int qdev_device_help(QemuOpts *opts)
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}
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klass = object_class_by_name(driver);
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if (!klass) {
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const char *typename = find_typename_by_alias(driver);
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if (typename) {
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driver = typename;
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klass = object_class_by_name(driver);
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}
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}
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if (!klass) {
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return 0;
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}
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@ -263,6 +327,7 @@ static DeviceState *qdev_get_peripheral_anon(void)
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DeviceState *qdev_device_add(QemuOpts *opts)
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{
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ObjectClass *obj;
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DeviceClass *k;
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const char *driver, *path, *id;
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DeviceState *qdev;
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@ -275,7 +340,22 @@ DeviceState *qdev_device_add(QemuOpts *opts)
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}
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/* find driver */
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k = DEVICE_CLASS(object_class_by_name(driver));
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obj = object_class_by_name(driver);
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if (!obj) {
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const char *typename = find_typename_by_alias(driver);
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if (typename) {
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driver = typename;
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obj = object_class_by_name(driver);
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}
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}
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if (!obj) {
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qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver", "device type");
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return NULL;
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}
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k = DEVICE_CLASS(obj);
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/* find bus */
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path = qemu_opt_get(opts, "bus");
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@ -753,7 +833,8 @@ static DeviceState *qbus_find_dev(BusState *bus, char *elem)
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QTAILQ_FOREACH(dev, &bus->children, sibling) {
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DeviceClass *dc = DEVICE_GET_CLASS(dev);
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if (dc->alias && strcmp(dc->alias, elem) == 0) {
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if (qdev_class_has_alias(dc) &&
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strcmp(qdev_class_get_alias(dc), elem) == 0) {
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return dev;
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}
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}
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@ -78,7 +78,6 @@ typedef struct DeviceClass {
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ObjectClass parent_class;
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const char *fw_name;
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const char *alias;
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const char *desc;
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Property *props;
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int no_user;
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@ -354,7 +354,6 @@ static void s390_virtio_net_class_init(ObjectClass *klass, void *data)
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k->init = s390_virtio_net_init;
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dc->props = s390_virtio_net_properties;
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dc->alias = "virtio-net";
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}
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static TypeInfo s390_virtio_net = {
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@ -377,7 +376,6 @@ static void s390_virtio_blk_class_init(ObjectClass *klass, void *data)
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k->init = s390_virtio_blk_init;
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dc->props = s390_virtio_blk_properties;
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dc->alias = "virtio-blk";
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}
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static TypeInfo s390_virtio_blk = {
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@ -400,7 +398,6 @@ static void s390_virtio_serial_class_init(ObjectClass *klass, void *data)
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k->init = s390_virtio_serial_init;
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dc->props = s390_virtio_serial_properties;
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dc->alias = "virtio-serial";
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}
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static TypeInfo s390_virtio_serial = {
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@ -827,7 +827,6 @@ static void virtio_blk_class_init(ObjectClass *klass, void *data)
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k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
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k->revision = VIRTIO_PCI_ABI_VERSION;
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k->class_id = PCI_CLASS_STORAGE_SCSI;
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dc->alias = "virtio-blk";
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dc->reset = virtio_pci_reset;
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dc->props = virtio_blk_properties;
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}
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@ -862,7 +861,6 @@ static void virtio_net_class_init(ObjectClass *klass, void *data)
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k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
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k->revision = VIRTIO_PCI_ABI_VERSION;
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k->class_id = PCI_CLASS_NETWORK_ETHERNET;
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dc->alias = "virtio-net";
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dc->reset = virtio_pci_reset;
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dc->props = virtio_net_properties;
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}
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@ -894,7 +892,6 @@ static void virtio_serial_class_init(ObjectClass *klass, void *data)
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k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
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k->revision = VIRTIO_PCI_ABI_VERSION;
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k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
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dc->alias = "virtio-serial";
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dc->reset = virtio_pci_reset;
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dc->props = virtio_serial_properties;
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}
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@ -922,7 +919,6 @@ static void virtio_balloon_class_init(ObjectClass *klass, void *data)
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k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON;
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k->revision = VIRTIO_PCI_ABI_VERSION;
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k->class_id = PCI_CLASS_MEMORY_RAM;
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dc->alias = "virtio-balloon";
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dc->reset = virtio_pci_reset;
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dc->props = virtio_balloon_properties;
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}
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@ -937,13 +933,9 @@ static TypeInfo virtio_balloon_info = {
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static void virtio_pci_register_devices(void)
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{
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type_register_static(&virtio_blk_info);
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type_register_static_alias(&virtio_blk_info, "virtio-blk");
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type_register_static(&virtio_net_info);
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type_register_static_alias(&virtio_net_info, "virtio-net");
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type_register_static(&virtio_serial_info);
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type_register_static_alias(&virtio_serial_info, "virtio-serial");
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type_register_static(&virtio_balloon_info);
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type_register_static_alias(&virtio_balloon_info, "virtio-balloon");
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}
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device_init(virtio_pci_register_devices)
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