qemu/qdev-monitor.c
Markus Armbruster 922a01a013 Move include qemu/option.h from qemu-common.h to actual users
qemu-common.h includes qemu/option.h, but most places that include the
former don't actually need the latter.  Drop the include, and add it
to the places that actually need it.

While there, drop superfluous includes of both headers, and
separate #include from file comment with a blank line.

This cleanup makes the number of objects depending on qemu/option.h
drop from 4545 (out of 4743) to 284 in my "build everything" tree.

Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20180201111846.21846-20-armbru@redhat.com>
[Semantic conflict with commit bdd6a90a9e in block/nvme.c resolved]
2018-02-09 13:52:16 +01:00

976 lines
27 KiB
C

/*
* 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 "qemu/osdep.h"
#include "hw/qdev.h"
#include "hw/sysbus.h"
#include "monitor/monitor.h"
#include "monitor/qdev.h"
#include "qmp-commands.h"
#include "sysemu/arch_init.h"
#include "qapi/error.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qerror.h"
#include "qemu/config-file.h"
#include "qemu/error-report.h"
#include "qemu/help_option.h"
#include "qemu/option.h"
#include "sysemu/block-backend.h"
#include "migration/misc.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;
uint32_t arch_mask;
} QDevAlias;
/* Please keep this table sorted by typename. */
static const QDevAlias qdev_alias_table[] = {
{ "e1000", "e1000-82540em" },
{ "ich9-ahci", "ahci" },
{ "lsi53c895a", "lsi" },
{ "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
{ "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
{ "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
{ "virtio-balloon-pci", "virtio-balloon",
QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
{ "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
{ "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
{ "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X },
{ "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
{ "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X },
{ "virtio-input-host-pci", "virtio-input-host",
QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
{ "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X },
{ "virtio-keyboard-pci", "virtio-keyboard",
QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
{ "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X },
{ "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
{ "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
{ "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
{ "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X },
{ "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
{ "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
{ "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
{ "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
{ "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
{ "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X },
{ "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
{ }
};
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 (qdev_alias_table[i].arch_mask &&
!(qdev_alias_table[i].arch_mask & arch_type)) {
continue;
}
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(DeviceClass *dc)
{
error_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
if (dc->bus_type) {
error_printf(", bus %s", dc->bus_type);
}
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->user_creatable) {
error_printf(", no-user");
}
error_printf("\n");
}
static gint devinfo_cmp(gconstpointer a, gconstpointer b)
{
return strcasecmp(object_class_get_name((ObjectClass *)a),
object_class_get_name((ObjectClass *)b));
}
static void qdev_print_devinfos(bool show_no_user)
{
static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
[DEVICE_CATEGORY_BRIDGE] = "Controller/Bridge/Hub",
[DEVICE_CATEGORY_USB] = "USB",
[DEVICE_CATEGORY_STORAGE] = "Storage",
[DEVICE_CATEGORY_NETWORK] = "Network",
[DEVICE_CATEGORY_INPUT] = "Input",
[DEVICE_CATEGORY_DISPLAY] = "Display",
[DEVICE_CATEGORY_SOUND] = "Sound",
[DEVICE_CATEGORY_MISC] = "Misc",
[DEVICE_CATEGORY_CPU] = "CPU",
[DEVICE_CATEGORY_MAX] = "Uncategorized",
};
GSList *list, *elt;
int i;
bool cat_printed;
list = g_slist_sort(object_class_get_list(TYPE_DEVICE, false),
devinfo_cmp);
for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
cat_printed = false;
for (elt = list; elt; elt = elt->next) {
DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
TYPE_DEVICE);
if ((i < DEVICE_CATEGORY_MAX
? !test_bit(i, dc->categories)
: !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
|| (!show_no_user
&& !dc->user_creatable)) {
continue;
}
if (!cat_printed) {
error_printf("%s%s devices:\n", i ? "\n" : "",
cat_name[i]);
cat_printed = true;
}
qdev_print_devinfo(dc);
}
}
g_slist_free(list);
}
static int set_property(void *opaque, const char *name, const char *value,
Error **errp)
{
Object *obj = opaque;
Error *err = NULL;
if (strcmp(name, "driver") == 0)
return 0;
if (strcmp(name, "bus") == 0)
return 0;
object_property_parse(obj, value, name, &err);
if (err != NULL) {
error_propagate(errp, err);
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 (qdev_alias_table[i].arch_mask &&
!(qdev_alias_table[i].arch_mask & arch_type)) {
continue;
}
if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
return qdev_alias_table[i].typename;
}
}
return NULL;
}
static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
{
ObjectClass *oc;
DeviceClass *dc;
const char *original_name = *driver;
oc = object_class_by_name(*driver);
if (!oc) {
const char *typename = find_typename_by_alias(*driver);
if (typename) {
*driver = typename;
oc = object_class_by_name(*driver);
}
}
if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
if (*driver != original_name) {
error_setg(errp, "'%s' (alias '%s') is not a valid device model"
" name", original_name, *driver);
} else {
error_setg(errp, "'%s' is not a valid device model name", *driver);
}
return NULL;
}
if (object_class_is_abstract(oc)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
"non-abstract device type");
return NULL;
}
dc = DEVICE_CLASS(oc);
if (!dc->user_creatable ||
(qdev_hotplug && !dc->hotpluggable)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
"pluggable device type");
return NULL;
}
return dc;
}
int qdev_device_help(QemuOpts *opts)
{
Error *local_err = NULL;
const char *driver;
DevicePropertyInfoList *prop_list;
DevicePropertyInfoList *prop;
driver = qemu_opt_get(opts, "driver");
if (driver && is_help_option(driver)) {
qdev_print_devinfos(false);
return 1;
}
if (!driver || !qemu_opt_has_help_opt(opts)) {
return 0;
}
if (!object_class_by_name(driver)) {
const char *typename = find_typename_by_alias(driver);
if (typename) {
driver = typename;
}
}
prop_list = qmp_device_list_properties(driver, &local_err);
if (local_err) {
goto error;
}
for (prop = prop_list; prop; prop = prop->next) {
error_printf("%s.%s=%s", driver,
prop->value->name,
prop->value->type);
if (prop->value->has_description) {
error_printf(" (%s)\n", prop->value->description);
} else {
error_printf("\n");
}
}
qapi_free_DevicePropertyInfoList(prop_list);
return 1;
error:
error_report_err(local_err);
return 1;
}
static Object *qdev_get_peripheral(void)
{
static Object *dev;
if (dev == NULL) {
dev = container_get(qdev_get_machine(), "/peripheral");
}
return dev;
}
static Object *qdev_get_peripheral_anon(void)
{
static Object *dev;
if (dev == NULL) {
dev = container_get(qdev_get_machine(), "/peripheral-anon");
}
return dev;
}
static void qbus_list_bus(DeviceState *dev, Error **errp)
{
BusState *child;
const char *sep = " ";
error_append_hint(errp, "child buses at \"%s\":",
dev->id ? dev->id : object_get_typename(OBJECT(dev)));
QLIST_FOREACH(child, &dev->child_bus, sibling) {
error_append_hint(errp, "%s\"%s\"", sep, child->name);
sep = ", ";
}
error_append_hint(errp, "\n");
}
static void qbus_list_dev(BusState *bus, Error **errp)
{
BusChild *kid;
const char *sep = " ";
error_append_hint(errp, "devices at \"%s\":", bus->name);
QTAILQ_FOREACH(kid, &bus->children, sibling) {
DeviceState *dev = kid->child;
error_append_hint(errp, "%s\"%s\"", sep,
object_get_typename(OBJECT(dev)));
if (dev->id) {
error_append_hint(errp, "/\"%s\"", dev->id);
}
sep = ", ";
}
error_append_hint(errp, "\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)
{
BusChild *kid;
/*
* try to match in order:
* (1) instance id, if present
* (2) driver name
* (3) driver alias, if present
*/
QTAILQ_FOREACH(kid, &bus->children, sibling) {
DeviceState *dev = kid->child;
if (dev->id && strcmp(dev->id, elem) == 0) {
return dev;
}
}
QTAILQ_FOREACH(kid, &bus->children, sibling) {
DeviceState *dev = kid->child;
if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
return dev;
}
}
QTAILQ_FOREACH(kid, &bus->children, sibling) {
DeviceState *dev = kid->child;
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 inline bool qbus_is_full(BusState *bus)
{
BusClass *bus_class = BUS_GET_CLASS(bus);
return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
}
/*
* Search the tree rooted at @bus for a bus.
* If @name, search for a bus with that name. Note that bus names
* need not be unique. Yes, that's screwed up.
* Else search for a bus that is a subtype of @bus_typename.
* If more than one exists, prefer one that can take another device.
* Return the bus if found, else %NULL.
*/
static BusState *qbus_find_recursive(BusState *bus, const char *name,
const char *bus_typename)
{
BusChild *kid;
BusState *pick, *child, *ret;
bool match;
assert(name || bus_typename);
if (name) {
match = !strcmp(bus->name, name);
} else {
match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
}
if (match && !qbus_is_full(bus)) {
return bus; /* root matches and isn't full */
}
pick = match ? bus : NULL;
QTAILQ_FOREACH(kid, &bus->children, sibling) {
DeviceState *dev = kid->child;
QLIST_FOREACH(child, &dev->child_bus, sibling) {
ret = qbus_find_recursive(child, name, bus_typename);
if (ret && !qbus_is_full(ret)) {
return ret; /* a descendant matches and isn't full */
}
if (ret && !pick) {
pick = ret;
}
}
}
/* root or a descendant matches, but is full */
return pick;
}
static BusState *qbus_find(const char *path, Error **errp)
{
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) {
error_setg(errp, "Bus '%s' not found", elem);
return NULL;
}
pos = len;
}
for (;;) {
assert(path[pos] == '/' || !path[pos]);
while (path[pos] == '/') {
pos++;
}
if (path[pos] == '\0') {
break;
}
/* find device */
if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
g_assert_not_reached();
elem[0] = len = 0;
}
pos += len;
dev = qbus_find_dev(bus, elem);
if (!dev) {
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
"Device '%s' not found", elem);
qbus_list_dev(bus, errp);
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 */
if (dev->num_child_bus == 1) {
bus = QLIST_FIRST(&dev->child_bus);
break;
}
if (dev->num_child_bus) {
error_setg(errp, "Device '%s' has multiple child buses",
elem);
qbus_list_bus(dev, errp);
} else {
error_setg(errp, "Device '%s' has no child bus", elem);
}
return NULL;
}
/* find bus */
if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
g_assert_not_reached();
elem[0] = len = 0;
}
pos += len;
bus = qbus_find_bus(dev, elem);
if (!bus) {
error_setg(errp, "Bus '%s' not found", elem);
qbus_list_bus(dev, errp);
return NULL;
}
}
if (qbus_is_full(bus)) {
error_setg(errp, "Bus '%s' is full", path);
return NULL;
}
return bus;
}
void qdev_set_id(DeviceState *dev, const char *id)
{
if (id) {
dev->id = id;
}
if (dev->id) {
object_property_add_child(qdev_get_peripheral(), dev->id,
OBJECT(dev), 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(dev), NULL);
g_free(name);
}
}
DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
{
DeviceClass *dc;
const char *driver, *path;
DeviceState *dev;
BusState *bus = NULL;
Error *err = NULL;
driver = qemu_opt_get(opts, "driver");
if (!driver) {
error_setg(errp, QERR_MISSING_PARAMETER, "driver");
return NULL;
}
/* find driver */
dc = qdev_get_device_class(&driver, errp);
if (!dc) {
return NULL;
}
/* find bus */
path = qemu_opt_get(opts, "bus");
if (path != NULL) {
bus = qbus_find(path, errp);
if (!bus) {
return NULL;
}
if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
error_setg(errp, "Device '%s' can't go on %s bus",
driver, object_get_typename(OBJECT(bus)));
return NULL;
}
} else if (dc->bus_type != NULL) {
bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
if (!bus || qbus_is_full(bus)) {
error_setg(errp, "No '%s' bus found for device '%s'",
dc->bus_type, driver);
return NULL;
}
}
if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
return NULL;
}
if (!migration_is_idle()) {
error_setg(errp, "device_add not allowed while migrating");
return NULL;
}
/* create device */
dev = DEVICE(object_new(driver));
if (bus) {
qdev_set_parent_bus(dev, bus);
} else if (qdev_hotplug && !qdev_get_machine_hotplug_handler(dev)) {
/* No bus, no machine hotplug handler --> device is not hotpluggable */
error_setg(&err, "Device '%s' can not be hotplugged on this machine",
driver);
goto err_del_dev;
}
qdev_set_id(dev, qemu_opts_id(opts));
/* set properties */
if (qemu_opt_foreach(opts, set_property, dev, &err)) {
goto err_del_dev;
}
dev->opts = opts;
object_property_set_bool(OBJECT(dev), true, "realized", &err);
if (err != NULL) {
dev->opts = NULL;
goto err_del_dev;
}
return dev;
err_del_dev:
error_propagate(errp, err);
object_unparent(OBJECT(dev));
object_unref(OBJECT(dev));
return NULL;
}
#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,
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_print(OBJECT(dev), props->name, true, &err);
}
g_free(legacy_name);
if (err) {
error_free(err);
continue;
}
qdev_printf("%s = %s\n", props->name,
value && *value ? value : "<null>");
g_free(value);
}
}
static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
{
BusClass *bc = BUS_GET_CLASS(bus);
if (bc->print_dev) {
bc->print_dev(mon, dev, indent);
}
}
static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
{
ObjectClass *class;
BusState *child;
NamedGPIOList *ngl;
qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
dev->id ? dev->id : "");
indent += 2;
QLIST_FOREACH(ngl, &dev->gpios, node) {
if (ngl->num_in) {
qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
ngl->num_in);
}
if (ngl->num_out) {
qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
ngl->num_out);
}
}
class = object_get_class(OBJECT(dev));
do {
qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
class = object_class_get_parent(class);
} while (class != object_class_by_name(TYPE_DEVICE));
bus_print_dev(dev->parent_bus, 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)
{
BusChild *kid;
qdev_printf("bus: %s\n", bus->name);
indent += 2;
qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
QTAILQ_FOREACH(kid, &bus->children, sibling) {
DeviceState *dev = kid->child;
qdev_print(mon, dev, indent);
}
}
#undef qdev_printf
void hmp_info_qtree(Monitor *mon, const QDict *qdict)
{
if (sysbus_get_default())
qbus_print(mon, sysbus_get_default(), 0);
}
void hmp_info_qdm(Monitor *mon, const QDict *qdict)
{
qdev_print_devinfos(true);
}
typedef struct QOMCompositionState {
Monitor *mon;
int indent;
} QOMCompositionState;
static void print_qom_composition(Monitor *mon, Object *obj, int indent);
static int print_qom_composition_child(Object *obj, void *opaque)
{
QOMCompositionState *s = opaque;
print_qom_composition(s->mon, obj, s->indent);
return 0;
}
static void print_qom_composition(Monitor *mon, Object *obj, int indent)
{
QOMCompositionState s = {
.mon = mon,
.indent = indent + 2,
};
char *name;
if (obj == object_get_root()) {
name = g_strdup("");
} else {
name = object_get_canonical_path_component(obj);
}
monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
object_get_typename(obj));
g_free(name);
object_child_foreach(obj, print_qom_composition_child, &s);
}
void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
{
const char *path = qdict_get_try_str(dict, "path");
Object *obj;
bool ambiguous = false;
if (path) {
obj = object_resolve_path(path, &ambiguous);
if (!obj) {
monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
return;
}
if (ambiguous) {
monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
return;
}
} else {
obj = qdev_get_machine();
}
print_qom_composition(mon, obj, 0);
}
void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
{
Error *local_err = NULL;
QemuOpts *opts;
DeviceState *dev;
opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
qemu_opts_del(opts);
return;
}
dev = qdev_device_add(opts, &local_err);
if (!dev) {
error_propagate(errp, local_err);
qemu_opts_del(opts);
return;
}
object_unref(OBJECT(dev));
}
static DeviceState *find_device_state(const char *id, Error **errp)
{
Object *obj;
if (id[0] == '/') {
obj = object_resolve_path(id, NULL);
} else {
char *root_path = object_get_canonical_path(qdev_get_peripheral());
char *path = g_strdup_printf("%s/%s", root_path, id);
g_free(root_path);
obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
g_free(path);
}
if (!obj) {
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
"Device '%s' not found", id);
return NULL;
}
if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
error_setg(errp, "%s is not a hotpluggable device", id);
return NULL;
}
return DEVICE(obj);
}
void qdev_unplug(DeviceState *dev, Error **errp)
{
DeviceClass *dc = DEVICE_GET_CLASS(dev);
HotplugHandler *hotplug_ctrl;
HotplugHandlerClass *hdc;
if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
return;
}
if (!dc->hotpluggable) {
error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
object_get_typename(OBJECT(dev)));
return;
}
if (!migration_is_idle()) {
error_setg(errp, "device_del not allowed while migrating");
return;
}
qdev_hot_removed = true;
hotplug_ctrl = qdev_get_hotplug_handler(dev);
/* hotpluggable device MUST have HotplugHandler, if it doesn't
* then something is very wrong with it */
g_assert(hotplug_ctrl);
/* If device supports async unplug just request it to be done,
* otherwise just remove it synchronously */
hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
if (hdc->unplug_request) {
hotplug_handler_unplug_request(hotplug_ctrl, dev, errp);
} else {
hotplug_handler_unplug(hotplug_ctrl, dev, errp);
}
}
void qmp_device_del(const char *id, Error **errp)
{
DeviceState *dev = find_device_state(id, errp);
if (dev != NULL) {
qdev_unplug(dev, errp);
}
}
BlockBackend *blk_by_qdev_id(const char *id, Error **errp)
{
DeviceState *dev;
BlockBackend *blk;
dev = find_device_state(id, errp);
if (dev == NULL) {
return NULL;
}
blk = blk_by_dev(dev);
if (!blk) {
error_setg(errp, "Device does not have a block device backend");
}
return blk;
}
void qdev_machine_init(void)
{
qdev_get_peripheral_anon();
qdev_get_peripheral();
}
QemuOptsList qemu_device_opts = {
.name = "device",
.implied_opt_name = "driver",
.head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
.desc = {
/*
* no elements => accept any
* sanity checking will happen later
* when setting device properties
*/
{ /* end of list */ }
},
};
QemuOptsList qemu_global_opts = {
.name = "global",
.head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
.desc = {
{
.name = "driver",
.type = QEMU_OPT_STRING,
},{
.name = "property",
.type = QEMU_OPT_STRING,
},{
.name = "value",
.type = QEMU_OPT_STRING,
},
{ /* end of list */ }
},
};
int qemu_global_option(const char *str)
{
char driver[64], property[64];
QemuOpts *opts;
int rc, offset;
rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
if (rc == 2 && str[offset] == '=') {
opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
qemu_opt_set(opts, "driver", driver, &error_abort);
qemu_opt_set(opts, "property", property, &error_abort);
qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
return 0;
}
opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
if (!opts) {
return -1;
}
return 0;
}