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xemu/hw/qdev-monitor.c
Paolo Bonzini d822979bdf qdev: remove direct calls to print/parse 
There's no need to call into ->parse and ->print manually.  The
QOM legacy properties do that for us.

Furthermore, in some cases legacy and static properties have exactly
the same behavior, and we could drop the legacy properties right away.
Add an appropriate fallback to prepare for this.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-02-07 13:52:41 +01:00

593 lines
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/*
* Dynamic device configuration and creation.
*
* Copyright (c) 2009 CodeSourcery
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qdev.h"
#include "monitor.h"
/*
* Aliases were a bad idea from the start. Let's keep them
* from spreading further.
*/
typedef struct QDevAlias
{
const char *typename;
const char *alias;
} QDevAlias;
static const QDevAlias qdev_alias_table[] = {
{ "virtio-blk-pci", "virtio-blk" },
{ "virtio-net-pci", "virtio-net" },
{ "virtio-serial-pci", "virtio-serial" },
{ "virtio-balloon-pci", "virtio-balloon" },
{ "virtio-blk-s390", "virtio-blk" },
{ "virtio-net-s390", "virtio-net" },
{ "virtio-serial-s390", "virtio-serial" },
{ "lsi53c895a", "lsi" },
{ "ich9-ahci", "ahci" },
{ }
};
static const char *qdev_class_get_alias(DeviceClass *dc)
{
const char *typename = object_class_get_name(OBJECT_CLASS(dc));
int i;
for (i = 0; qdev_alias_table[i].typename; i++) {
if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
return qdev_alias_table[i].alias;
}
}
return NULL;
}
static bool qdev_class_has_alias(DeviceClass *dc)
{
return (qdev_class_get_alias(dc) != NULL);
}
static void qdev_print_devinfo(ObjectClass *klass, void *opaque)
{
DeviceClass *dc;
bool *show_no_user = opaque;
dc = (DeviceClass *)object_class_dynamic_cast(klass, TYPE_DEVICE);
if (!dc || (show_no_user && !*show_no_user && dc->no_user)) {
return;
}
error_printf("name \"%s\"", object_class_get_name(klass));
if (dc->bus_info) {
error_printf(", bus %s", dc->bus_info->name);
}
if (qdev_class_has_alias(dc)) {
error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
}
if (dc->desc) {
error_printf(", desc \"%s\"", dc->desc);
}
if (dc->no_user) {
error_printf(", no-user");
}
error_printf("\n");
}
static int set_property(const char *name, const char *value, void *opaque)
{
DeviceState *dev = opaque;
if (strcmp(name, "driver") == 0)
return 0;
if (strcmp(name, "bus") == 0)
return 0;
if (qdev_prop_parse(dev, name, value) == -1) {
return -1;
}
return 0;
}
static const char *find_typename_by_alias(const char *alias)
{
int i;
for (i = 0; qdev_alias_table[i].alias; i++) {
if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
return qdev_alias_table[i].typename;
}
}
return NULL;
}
int qdev_device_help(QemuOpts *opts)
{
const char *driver;
Property *prop;
ObjectClass *klass;
DeviceClass *info;
driver = qemu_opt_get(opts, "driver");
if (driver && !strcmp(driver, "?")) {
bool show_no_user = false;
object_class_foreach(qdev_print_devinfo, TYPE_DEVICE, false, &show_no_user);
return 1;
}
if (!driver || !qemu_opt_get(opts, "?")) {
return 0;
}
klass = object_class_by_name(driver);
if (!klass) {
const char *typename = find_typename_by_alias(driver);
if (typename) {
driver = typename;
klass = object_class_by_name(driver);
}
}
if (!klass) {
return 0;
}
info = DEVICE_CLASS(klass);
for (prop = info->props; prop && prop->name; prop++) {
/*
* TODO Properties without a parser are just for dirty hacks.
* qdev_prop_ptr is the only such PropertyInfo. It's marked
* for removal. This conditional should be removed along with
* it.
*/
if (!prop->info->parse) {
continue; /* no way to set it, don't show */
}
error_printf("%s.%s=%s\n", driver, prop->name,
prop->info->legacy_name ?: prop->info->name);
}
if (info->bus_info) {
for (prop = info->bus_info->props; prop && prop->name; prop++) {
if (!prop->info->parse) {
continue; /* no way to set it, don't show */
}
error_printf("%s.%s=%s\n", driver, prop->name,
prop->info->legacy_name ?: prop->info->name);
}
}
return 1;
}
static Object *qdev_get_peripheral(void)
{
static Object *dev;
if (dev == NULL) {
dev = object_new("container");
object_property_add_child(object_get_root(), "peripheral",
OBJECT(dev), NULL);
}
return dev;
}
static Object *qdev_get_peripheral_anon(void)
{
static Object *dev;
if (dev == NULL) {
dev = object_new("container");
object_property_add_child(object_get_root(), "peripheral-anon",
OBJECT(dev), NULL);
}
return dev;
}
static void qbus_list_bus(DeviceState *dev)
{
BusState *child;
const char *sep = " ";
error_printf("child busses at \"%s\":",
dev->id ? dev->id : object_get_typename(OBJECT(dev)));
QLIST_FOREACH(child, &dev->child_bus, sibling) {
error_printf("%s\"%s\"", sep, child->name);
sep = ", ";
}
error_printf("\n");
}
static void qbus_list_dev(BusState *bus)
{
DeviceState *dev;
const char *sep = " ";
error_printf("devices at \"%s\":", bus->name);
QTAILQ_FOREACH(dev, &bus->children, sibling) {
error_printf("%s\"%s\"", sep, object_get_typename(OBJECT(dev)));
if (dev->id)
error_printf("/\"%s\"", dev->id);
sep = ", ";
}
error_printf("\n");
}
static BusState *qbus_find_bus(DeviceState *dev, char *elem)
{
BusState *child;
QLIST_FOREACH(child, &dev->child_bus, sibling) {
if (strcmp(child->name, elem) == 0) {
return child;
}
}
return NULL;
}
static DeviceState *qbus_find_dev(BusState *bus, char *elem)
{
DeviceState *dev;
/*
* try to match in order:
* (1) instance id, if present
* (2) driver name
* (3) driver alias, if present
*/
QTAILQ_FOREACH(dev, &bus->children, sibling) {
if (dev->id && strcmp(dev->id, elem) == 0) {
return dev;
}
}
QTAILQ_FOREACH(dev, &bus->children, sibling) {
if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
return dev;
}
}
QTAILQ_FOREACH(dev, &bus->children, sibling) {
DeviceClass *dc = DEVICE_GET_CLASS(dev);
if (qdev_class_has_alias(dc) &&
strcmp(qdev_class_get_alias(dc), elem) == 0) {
return dev;
}
}
return NULL;
}
static BusState *qbus_find_recursive(BusState *bus, const char *name,
const BusInfo *info)
{
DeviceState *dev;
BusState *child, *ret;
int match = 1;
if (name && (strcmp(bus->name, name) != 0)) {
match = 0;
}
if (info && (bus->info != info)) {
match = 0;
}
if (match) {
return bus;
}
QTAILQ_FOREACH(dev, &bus->children, sibling) {
QLIST_FOREACH(child, &dev->child_bus, sibling) {
ret = qbus_find_recursive(child, name, info);
if (ret) {
return ret;
}
}
}
return NULL;
}
static BusState *qbus_find(const char *path)
{
DeviceState *dev;
BusState *bus;
char elem[128];
int pos, len;
/* find start element */
if (path[0] == '/') {
bus = sysbus_get_default();
pos = 0;
} else {
if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
assert(!path[0]);
elem[0] = len = 0;
}
bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
if (!bus) {
qerror_report(QERR_BUS_NOT_FOUND, elem);
return NULL;
}
pos = len;
}
for (;;) {
assert(path[pos] == '/' || !path[pos]);
while (path[pos] == '/') {
pos++;
}
if (path[pos] == '\0') {
return bus;
}
/* find device */
if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
assert(0);
elem[0] = len = 0;
}
pos += len;
dev = qbus_find_dev(bus, elem);
if (!dev) {
qerror_report(QERR_DEVICE_NOT_FOUND, elem);
if (!monitor_cur_is_qmp()) {
qbus_list_dev(bus);
}
return NULL;
}
assert(path[pos] == '/' || !path[pos]);
while (path[pos] == '/') {
pos++;
}
if (path[pos] == '\0') {
/* last specified element is a device. If it has exactly
* one child bus accept it nevertheless */
switch (dev->num_child_bus) {
case 0:
qerror_report(QERR_DEVICE_NO_BUS, elem);
return NULL;
case 1:
return QLIST_FIRST(&dev->child_bus);
default:
qerror_report(QERR_DEVICE_MULTIPLE_BUSSES, elem);
if (!monitor_cur_is_qmp()) {
qbus_list_bus(dev);
}
return NULL;
}
}
/* find bus */
if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
assert(0);
elem[0] = len = 0;
}
pos += len;
bus = qbus_find_bus(dev, elem);
if (!bus) {
qerror_report(QERR_BUS_NOT_FOUND, elem);
if (!monitor_cur_is_qmp()) {
qbus_list_bus(dev);
}
return NULL;
}
}
}
DeviceState *qdev_device_add(QemuOpts *opts)
{
ObjectClass *obj;
DeviceClass *k;
const char *driver, *path, *id;
DeviceState *qdev;
BusState *bus;
driver = qemu_opt_get(opts, "driver");
if (!driver) {
qerror_report(QERR_MISSING_PARAMETER, "driver");
return NULL;
}
/* find driver */
obj = object_class_by_name(driver);
if (!obj) {
const char *typename = find_typename_by_alias(driver);
if (typename) {
driver = typename;
obj = object_class_by_name(driver);
}
}
if (!obj) {
qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver", "device type");
return NULL;
}
k = DEVICE_CLASS(obj);
/* find bus */
path = qemu_opt_get(opts, "bus");
if (path != NULL) {
bus = qbus_find(path);
if (!bus) {
return NULL;
}
if (bus->info != k->bus_info) {
qerror_report(QERR_BAD_BUS_FOR_DEVICE,
driver, bus->info->name);
return NULL;
}
} else {
bus = qbus_find_recursive(sysbus_get_default(), NULL, k->bus_info);
if (!bus) {
qerror_report(QERR_NO_BUS_FOR_DEVICE,
driver, k->bus_info->name);
return NULL;
}
}
if (qdev_hotplug && !bus->allow_hotplug) {
qerror_report(QERR_BUS_NO_HOTPLUG, bus->name);
return NULL;
}
if (!bus) {
bus = sysbus_get_default();
}
/* create device, set properties */
qdev = DEVICE(object_new(driver));
qdev_set_parent_bus(qdev, bus);
qdev_prop_set_globals(qdev);
id = qemu_opts_id(opts);
if (id) {
qdev->id = id;
object_property_add_child(qdev_get_peripheral(), qdev->id,
OBJECT(qdev), NULL);
} else {
static int anon_count;
gchar *name = g_strdup_printf("device[%d]", anon_count++);
object_property_add_child(qdev_get_peripheral_anon(), name,
OBJECT(qdev), NULL);
g_free(name);
}
if (qemu_opt_foreach(opts, set_property, qdev, 1) != 0) {
qdev_free(qdev);
return NULL;
}
if (qdev_init(qdev) < 0) {
qerror_report(QERR_DEVICE_INIT_FAILED, driver);
return NULL;
}
qdev->opts = opts;
return qdev;
}
#define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
static void qbus_print(Monitor *mon, BusState *bus, int indent);
static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
const char *prefix, int indent)
{
if (!props)
return;
for (; props->name; props++) {
Error *err = NULL;
char *value;
char *legacy_name = g_strdup_printf("legacy-%s", props->name);
if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
value = object_property_get_str(OBJECT(dev), legacy_name, &err);
} else {
value = object_property_get_str(OBJECT(dev), props->name, &err);
}
g_free(legacy_name);
if (err) {
error_free(err);
continue;
}
qdev_printf("%s-prop: %s = %s\n", prefix, props->name,
value && *value ? value : "<null>");
g_free(value);
}
}
static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
{
BusState *child;
qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
dev->id ? dev->id : "");
indent += 2;
if (dev->num_gpio_in) {
qdev_printf("gpio-in %d\n", dev->num_gpio_in);
}
if (dev->num_gpio_out) {
qdev_printf("gpio-out %d\n", dev->num_gpio_out);
}
qdev_print_props(mon, dev, qdev_get_props(dev), "dev", indent);
qdev_print_props(mon, dev, dev->parent_bus->info->props, "bus", indent);
if (dev->parent_bus->info->print_dev)
dev->parent_bus->info->print_dev(mon, dev, indent);
QLIST_FOREACH(child, &dev->child_bus, sibling) {
qbus_print(mon, child, indent);
}
}
static void qbus_print(Monitor *mon, BusState *bus, int indent)
{
struct DeviceState *dev;
qdev_printf("bus: %s\n", bus->name);
indent += 2;
qdev_printf("type %s\n", bus->info->name);
QTAILQ_FOREACH(dev, &bus->children, sibling) {
qdev_print(mon, dev, indent);
}
}
#undef qdev_printf
void do_info_qtree(Monitor *mon)
{
if (sysbus_get_default())
qbus_print(mon, sysbus_get_default(), 0);
}
void do_info_qdm(Monitor *mon)
{
object_class_foreach(qdev_print_devinfo, TYPE_DEVICE, false, NULL);
}
int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
QemuOpts *opts;
opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict);
if (!opts) {
return -1;
}
if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
qemu_opts_del(opts);
return 0;
}
if (!qdev_device_add(opts)) {
qemu_opts_del(opts);
return -1;
}
return 0;
}
int do_device_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
const char *id = qdict_get_str(qdict, "id");
DeviceState *dev;
dev = qdev_find_recursive(sysbus_get_default(), id);
if (NULL == dev) {
qerror_report(QERR_DEVICE_NOT_FOUND, id);
return -1;
}
return qdev_unplug(dev);
}
void qdev_machine_init(void)
{
qdev_get_peripheral_anon();
qdev_get_peripheral();
}
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