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7746abd8e9
qemu/qmp.c
Daniel P. Berrange 7746abd8e9 qom: Change object property iterator API contract 
Currently the ObjectProperty iterator API works as follows:

  ObjectPropertyIterator *iter;

  iter = object_property_iter_init(obj);
  while ((prop = object_property_iter_next(iter))) {
     ...
  }
  object_property_iter_free(iter);

This has the benefit that the ObjectPropertyIterator struct
can be opaque, but has the downside that callers need to
explicitly call a free function. It is also not in keeping
with iterator style used elsewhere in QEMU/GLib2.

This patch changes the API to use stack allocation instead:

  ObjectPropertyIterator iter;

  object_property_iter_init(&iter, obj);
  while ((prop = object_property_iter_next(&iter))) {
     ...
  }

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[AF: Fused ObjectPropertyIterator struct with typedef]
Signed-off-by: Andreas Färber <afaerber@suse.de>
2016-01-18 17:47:58 +01:00

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/*
* QEMU Management Protocol
*
* Copyright IBM, Corp. 2011
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
#include "qemu-common.h"
#include "monitor/monitor.h"
#include "sysemu/sysemu.h"
#include "qmp-commands.h"
#include "sysemu/char.h"
#include "ui/qemu-spice.h"
#include "ui/vnc.h"
#include "sysemu/kvm.h"
#include "sysemu/arch_init.h"
#include "hw/qdev.h"
#include "sysemu/blockdev.h"
#include "sysemu/block-backend.h"
#include "qom/qom-qobject.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qmp/qobject.h"
#include "qapi/qmp-input-visitor.h"
#include "hw/boards.h"
#include "qom/object_interfaces.h"
#include "hw/mem/pc-dimm.h"
#include "hw/acpi/acpi_dev_interface.h"
NameInfo *qmp_query_name(Error **errp)
{
NameInfo *info = g_malloc0(sizeof(*info));
if (qemu_name) {
info->has_name = true;
info->name = g_strdup(qemu_name);
}
return info;
}
VersionInfo *qmp_query_version(Error **errp)
{
VersionInfo *info = g_new0(VersionInfo, 1);
const char *version = QEMU_VERSION;
const char *tmp;
int err;
info->qemu = g_new0(VersionTriple, 1);
err = qemu_strtoll(version, &tmp, 10, &info->qemu->major);
assert(err == 0);
tmp++;
err = qemu_strtoll(tmp, &tmp, 10, &info->qemu->minor);
assert(err == 0);
tmp++;
err = qemu_strtoll(tmp, &tmp, 10, &info->qemu->micro);
assert(err == 0);
info->package = g_strdup(QEMU_PKGVERSION);
return info;
}
KvmInfo *qmp_query_kvm(Error **errp)
{
KvmInfo *info = g_malloc0(sizeof(*info));
info->enabled = kvm_enabled();
info->present = kvm_available();
return info;
}
UuidInfo *qmp_query_uuid(Error **errp)
{
UuidInfo *info = g_malloc0(sizeof(*info));
char uuid[64];
snprintf(uuid, sizeof(uuid), UUID_FMT, qemu_uuid[0], qemu_uuid[1],
qemu_uuid[2], qemu_uuid[3], qemu_uuid[4], qemu_uuid[5],
qemu_uuid[6], qemu_uuid[7], qemu_uuid[8], qemu_uuid[9],
qemu_uuid[10], qemu_uuid[11], qemu_uuid[12], qemu_uuid[13],
qemu_uuid[14], qemu_uuid[15]);
info->UUID = g_strdup(uuid);
return info;
}
void qmp_quit(Error **errp)
{
no_shutdown = 0;
qemu_system_shutdown_request();
}
void qmp_stop(Error **errp)
{
if (runstate_check(RUN_STATE_INMIGRATE)) {
autostart = 0;
} else {
vm_stop(RUN_STATE_PAUSED);
}
}
void qmp_system_reset(Error **errp)
{
qemu_system_reset_request();
}
void qmp_system_powerdown(Error **erp)
{
qemu_system_powerdown_request();
}
void qmp_cpu(int64_t index, Error **errp)
{
/* Just do nothing */
}
void qmp_cpu_add(int64_t id, Error **errp)
{
MachineClass *mc;
mc = MACHINE_GET_CLASS(current_machine);
if (mc->hot_add_cpu) {
mc->hot_add_cpu(id, errp);
} else {
error_setg(errp, "Not supported");
}
}
#ifndef CONFIG_VNC
/* If VNC support is enabled, the "true" query-vnc command is
defined in the VNC subsystem */
VncInfo *qmp_query_vnc(Error **errp)
{
error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
return NULL;
};
VncInfo2List *qmp_query_vnc_servers(Error **errp)
{
error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
return NULL;
};
#endif
#ifndef CONFIG_SPICE
/*
* qmp-commands.hx ensures that QMP command query-spice exists only
* #ifdef CONFIG_SPICE. Necessary for an accurate query-commands
* result. However, the QAPI schema is blissfully unaware of that,
* and the QAPI code generator happily generates a dead
* qmp_marshal_query_spice() that calls qmp_query_spice(). Provide it
* one, or else linking fails. FIXME Educate the QAPI schema on
* CONFIG_SPICE.
*/
SpiceInfo *qmp_query_spice(Error **errp)
{
abort();
};
#endif
void qmp_cont(Error **errp)
{
Error *local_err = NULL;
BlockBackend *blk;
BlockDriverState *bs;
if (runstate_needs_reset()) {
error_setg(errp, "Resetting the Virtual Machine is required");
return;
} else if (runstate_check(RUN_STATE_SUSPENDED)) {
return;
}
for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
blk_iostatus_reset(blk);
}
for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
bdrv_add_key(bs, NULL, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
if (runstate_check(RUN_STATE_INMIGRATE)) {
autostart = 1;
} else {
vm_start();
}
}
void qmp_system_wakeup(Error **errp)
{
qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
}
ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
{
Object *obj;
bool ambiguous = false;
ObjectPropertyInfoList *props = NULL;
ObjectProperty *prop;
ObjectPropertyIterator iter;
obj = object_resolve_path(path, &ambiguous);
if (obj == NULL) {
if (ambiguous) {
error_setg(errp, "Path '%s' is ambiguous", path);
} else {
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
"Device '%s' not found", path);
}
return NULL;
}
object_property_iter_init(&iter, obj);
while ((prop = object_property_iter_next(&iter))) {
ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
entry->next = props;
props = entry;
entry->value->name = g_strdup(prop->name);
entry->value->type = g_strdup(prop->type);
}
return props;
}
void qmp_qom_set(const char *path, const char *property, QObject *value,
Error **errp)
{
Object *obj;
obj = object_resolve_path(path, NULL);
if (!obj) {
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
"Device '%s' not found", path);
return;
}
object_property_set_qobject(obj, value, property, errp);
}
QObject *qmp_qom_get(const char *path, const char *property, Error **errp)
{
Object *obj;
obj = object_resolve_path(path, NULL);
if (!obj) {
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
"Device '%s' not found", path);
return NULL;
}
return object_property_get_qobject(obj, property, errp);
}
void qmp_set_password(const char *protocol, const char *password,
bool has_connected, const char *connected, Error **errp)
{
int disconnect_if_connected = 0;
int fail_if_connected = 0;
int rc;
if (has_connected) {
if (strcmp(connected, "fail") == 0) {
fail_if_connected = 1;
} else if (strcmp(connected, "disconnect") == 0) {
disconnect_if_connected = 1;
} else if (strcmp(connected, "keep") == 0) {
/* nothing */
} else {
error_setg(errp, QERR_INVALID_PARAMETER, "connected");
return;
}
}
if (strcmp(protocol, "spice") == 0) {
if (!qemu_using_spice(errp)) {
return;
}
rc = qemu_spice_set_passwd(password, fail_if_connected,
disconnect_if_connected);
if (rc != 0) {
error_setg(errp, QERR_SET_PASSWD_FAILED);
}
return;
}
if (strcmp(protocol, "vnc") == 0) {
if (fail_if_connected || disconnect_if_connected) {
/* vnc supports "connected=keep" only */
error_setg(errp, QERR_INVALID_PARAMETER, "connected");
return;
}
/* Note that setting an empty password will not disable login through
* this interface. */
rc = vnc_display_password(NULL, password);
if (rc < 0) {
error_setg(errp, QERR_SET_PASSWD_FAILED);
}
return;
}
error_setg(errp, QERR_INVALID_PARAMETER, "protocol");
}
void qmp_expire_password(const char *protocol, const char *whenstr,
Error **errp)
{
time_t when;
int rc;
if (strcmp(whenstr, "now") == 0) {
when = 0;
} else if (strcmp(whenstr, "never") == 0) {
when = TIME_MAX;
} else if (whenstr[0] == '+') {
when = time(NULL) + strtoull(whenstr+1, NULL, 10);
} else {
when = strtoull(whenstr, NULL, 10);
}
if (strcmp(protocol, "spice") == 0) {
if (!qemu_using_spice(errp)) {
return;
}
rc = qemu_spice_set_pw_expire(when);
if (rc != 0) {
error_setg(errp, QERR_SET_PASSWD_FAILED);
}
return;
}
if (strcmp(protocol, "vnc") == 0) {
rc = vnc_display_pw_expire(NULL, when);
if (rc != 0) {
error_setg(errp, QERR_SET_PASSWD_FAILED);
}
return;
}
error_setg(errp, QERR_INVALID_PARAMETER, "protocol");
}
#ifdef CONFIG_VNC
void qmp_change_vnc_password(const char *password, Error **errp)
{
if (vnc_display_password(NULL, password) < 0) {
error_setg(errp, QERR_SET_PASSWD_FAILED);
}
}
static void qmp_change_vnc_listen(const char *target, Error **errp)
{
QemuOptsList *olist = qemu_find_opts("vnc");
QemuOpts *opts;
if (strstr(target, "id=")) {
error_setg(errp, "id not supported");
return;
}
opts = qemu_opts_find(olist, "default");
if (opts) {
qemu_opts_del(opts);
}
opts = vnc_parse(target, errp);
if (!opts) {
return;
}
vnc_display_open("default", errp);
}
static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
Error **errp)
{
if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
if (!has_arg) {
error_setg(errp, QERR_MISSING_PARAMETER, "password");
} else {
qmp_change_vnc_password(arg, errp);
}
} else {
qmp_change_vnc_listen(target, errp);
}
}
#else
void qmp_change_vnc_password(const char *password, Error **errp)
{
error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
}
static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
Error **errp)
{
error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
}
#endif /* !CONFIG_VNC */
void qmp_change(const char *device, const char *target,
bool has_arg, const char *arg, Error **errp)
{
if (strcmp(device, "vnc") == 0) {
qmp_change_vnc(target, has_arg, arg, errp);
} else {
qmp_blockdev_change_medium(device, target, has_arg, arg, false, 0,
errp);
}
}
static void qom_list_types_tramp(ObjectClass *klass, void *data)
{
ObjectTypeInfoList *e, **pret = data;
ObjectTypeInfo *info;
info = g_malloc0(sizeof(*info));
info->name = g_strdup(object_class_get_name(klass));
e = g_malloc0(sizeof(*e));
e->value = info;
e->next = *pret;
*pret = e;
}
ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
const char *implements,
bool has_abstract,
bool abstract,
Error **errp)
{
ObjectTypeInfoList *ret = NULL;
object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
return ret;
}
/* Return a DevicePropertyInfo for a qdev property.
*
* If a qdev property with the given name does not exist, use the given default
* type. If the qdev property info should not be shown, return NULL.
*
* The caller must free the return value.
*/
static DevicePropertyInfo *make_device_property_info(ObjectClass *klass,
const char *name,
const char *default_type,
const char *description)
{
DevicePropertyInfo *info;
Property *prop;
do {
for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
if (strcmp(name, prop->name) != 0) {
continue;
}
/*
* 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->set) {
return NULL; /* no way to set it, don't show */
}
info = g_malloc0(sizeof(*info));
info->name = g_strdup(prop->name);
info->type = g_strdup(prop->info->name);
info->has_description = !!prop->info->description;
info->description = g_strdup(prop->info->description);
return info;
}
klass = object_class_get_parent(klass);
} while (klass != object_class_by_name(TYPE_DEVICE));
/* Not a qdev property, use the default type */
info = g_malloc0(sizeof(*info));
info->name = g_strdup(name);
info->type = g_strdup(default_type);
info->has_description = !!description;
info->description = g_strdup(description);
return info;
}
DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
Error **errp)
{
ObjectClass *klass;
Object *obj;
ObjectProperty *prop;
ObjectPropertyIterator iter;
DevicePropertyInfoList *prop_list = NULL;
klass = object_class_by_name(typename);
if (klass == NULL) {
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
"Device '%s' not found", typename);
return NULL;
}
klass = object_class_dynamic_cast(klass, TYPE_DEVICE);
if (klass == NULL) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "name", TYPE_DEVICE);
return NULL;
}
if (object_class_is_abstract(klass)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "name",
"non-abstract device type");
return NULL;
}
if (DEVICE_CLASS(klass)->cannot_destroy_with_object_finalize_yet) {
error_setg(errp, "Can't list properties of device '%s'", typename);
return NULL;
}
obj = object_new(typename);
object_property_iter_init(&iter, obj);
while ((prop = object_property_iter_next(&iter))) {
DevicePropertyInfo *info;
DevicePropertyInfoList *entry;
/* Skip Object and DeviceState properties */
if (strcmp(prop->name, "type") == 0 ||
strcmp(prop->name, "realized") == 0 ||
strcmp(prop->name, "hotpluggable") == 0 ||
strcmp(prop->name, "hotplugged") == 0 ||
strcmp(prop->name, "parent_bus") == 0) {
continue;
}
/* Skip legacy properties since they are just string versions of
* properties that we already list.
*/
if (strstart(prop->name, "legacy-", NULL)) {
continue;
}
info = make_device_property_info(klass, prop->name, prop->type,
prop->description);
if (!info) {
continue;
}
entry = g_malloc0(sizeof(*entry));
entry->value = info;
entry->next = prop_list;
prop_list = entry;
}
object_unref(obj);
return prop_list;
}
CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
{
return arch_query_cpu_definitions(errp);
}
void qmp_add_client(const char *protocol, const char *fdname,
bool has_skipauth, bool skipauth, bool has_tls, bool tls,
Error **errp)
{
CharDriverState *s;
int fd;
fd = monitor_get_fd(cur_mon, fdname, errp);
if (fd < 0) {
return;
}
if (strcmp(protocol, "spice") == 0) {
if (!qemu_using_spice(errp)) {
close(fd);
return;
}
skipauth = has_skipauth ? skipauth : false;
tls = has_tls ? tls : false;
if (qemu_spice_display_add_client(fd, skipauth, tls) < 0) {
error_setg(errp, "spice failed to add client");
close(fd);
}
return;
#ifdef CONFIG_VNC
} else if (strcmp(protocol, "vnc") == 0) {
skipauth = has_skipauth ? skipauth : false;
vnc_display_add_client(NULL, fd, skipauth);
return;
#endif
} else if ((s = qemu_chr_find(protocol)) != NULL) {
if (qemu_chr_add_client(s, fd) < 0) {
error_setg(errp, "failed to add client");
close(fd);
return;
}
return;
}
error_setg(errp, "protocol '%s' is invalid", protocol);
close(fd);
}
void object_add(const char *type, const char *id, const QDict *qdict,
Visitor *v, Error **errp)
{
Object *obj;
ObjectClass *klass;
const QDictEntry *e;
Error *local_err = NULL;
klass = object_class_by_name(type);
if (!klass) {
error_setg(errp, "invalid object type: %s", type);
return;
}
if (!object_class_dynamic_cast(klass, TYPE_USER_CREATABLE)) {
error_setg(errp, "object type '%s' isn't supported by object-add",
type);
return;
}
if (object_class_is_abstract(klass)) {
error_setg(errp, "object type '%s' is abstract", type);
return;
}
obj = object_new(type);
if (qdict) {
for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
object_property_set(obj, v, e->key, &local_err);
if (local_err) {
goto out;
}
}
}
object_property_add_child(object_get_objects_root(),
id, obj, &local_err);
if (local_err) {
goto out;
}
user_creatable_complete(obj, &local_err);
if (local_err) {
object_property_del(object_get_objects_root(),
id, &error_abort);
goto out;
}
out:
if (local_err) {
error_propagate(errp, local_err);
}
object_unref(obj);
}
void qmp_object_add(const char *type, const char *id,
bool has_props, QObject *props, Error **errp)
{
const QDict *pdict = NULL;
QmpInputVisitor *qiv;
if (props) {
pdict = qobject_to_qdict(props);
if (!pdict) {
error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
return;
}
}
qiv = qmp_input_visitor_new(props);
object_add(type, id, pdict, qmp_input_get_visitor(qiv), errp);
qmp_input_visitor_cleanup(qiv);
}
void qmp_object_del(const char *id, Error **errp)
{
Object *container;
Object *obj;
container = object_get_objects_root();
obj = object_resolve_path_component(container, id);
if (!obj) {
error_setg(errp, "object id not found");
return;
}
if (!user_creatable_can_be_deleted(USER_CREATABLE(obj), errp)) {
error_setg(errp, "%s is in use, can not be deleted", id);
return;
}
object_unparent(obj);
}
MemoryDeviceInfoList *qmp_query_memory_devices(Error **errp)
{
MemoryDeviceInfoList *head = NULL;
MemoryDeviceInfoList **prev = &head;
qmp_pc_dimm_device_list(qdev_get_machine(), &prev);
return head;
}
ACPIOSTInfoList *qmp_query_acpi_ospm_status(Error **errp)
{
bool ambig;
ACPIOSTInfoList *head = NULL;
ACPIOSTInfoList **prev = &head;
Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, &ambig);
if (obj) {
AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj);
AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj);
adevc->ospm_status(adev, &prev);
} else {
error_setg(errp, "command is not supported, missing ACPI device");
}
return head;
}
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