qemu/qom/qom-hmp-cmds.c
Markus Armbruster eab3a4678b qobject: Change qobject_to_json()'s value to GString
qobject_to_json() and qobject_to_json_pretty() build a GString, then
covert it to QString.  Just one of the callers actually needs a
QString: qemu_rbd_parse_filename().  A few others need a string they
can modify: qmp_send_response(), qga's send_response(), to_json_str(),
and qmp_fd_vsend_fds().  The remainder just need a string.

Change qobject_to_json() and qobject_to_json_pretty() to return the
GString.

qemu_rbd_parse_filename() now has to convert to QString.  All others
save a QString temporary.  to_json_str() actually becomes a bit
simpler, because GString provides more convenient modification
functions.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20201211171152.146877-6-armbru@redhat.com>
2020-12-19 10:38:43 +01:00

153 lines
4.1 KiB
C

/*
* HMP commands related to QOM
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* later. See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "hw/qdev-core.h"
#include "monitor/hmp.h"
#include "monitor/monitor.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-qom.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qjson.h"
#include "qom/object.h"
void hmp_qom_list(Monitor *mon, const QDict *qdict)
{
const char *path = qdict_get_try_str(qdict, "path");
ObjectPropertyInfoList *list;
Error *err = NULL;
if (path == NULL) {
monitor_printf(mon, "/\n");
return;
}
list = qmp_qom_list(path, &err);
if (err == NULL) {
ObjectPropertyInfoList *start = list;
while (list != NULL) {
ObjectPropertyInfo *value = list->value;
monitor_printf(mon, "%s (%s)\n",
value->name, value->type);
list = list->next;
}
qapi_free_ObjectPropertyInfoList(start);
}
hmp_handle_error(mon, err);
}
void hmp_qom_set(Monitor *mon, const QDict *qdict)
{
const bool json = qdict_get_try_bool(qdict, "json", false);
const char *path = qdict_get_str(qdict, "path");
const char *property = qdict_get_str(qdict, "property");
const char *value = qdict_get_str(qdict, "value");
Error *err = NULL;
if (!json) {
Object *obj = object_resolve_path(path, NULL);
if (!obj) {
error_set(&err, ERROR_CLASS_DEVICE_NOT_FOUND,
"Device '%s' not found", path);
} else {
object_property_parse(obj, property, value, &err);
}
} else {
QObject *obj = qobject_from_json(value, &err);
if (!err) {
qmp_qom_set(path, property, obj, &err);
}
}
hmp_handle_error(mon, err);
}
void hmp_qom_get(Monitor *mon, const QDict *qdict)
{
const char *path = qdict_get_str(qdict, "path");
const char *property = qdict_get_str(qdict, "property");
Error *err = NULL;
QObject *obj = qmp_qom_get(path, property, &err);
if (err == NULL) {
GString *str = qobject_to_json_pretty(obj, true);
monitor_printf(mon, "%s\n", str->str);
g_string_free(str, true);
}
qobject_unref(obj);
hmp_handle_error(mon, err);
}
typedef struct QOMCompositionState {
Monitor *mon;
int indent;
} QOMCompositionState;
static void print_qom_composition(Monitor *mon, Object *obj, int indent);
static int qom_composition_compare(const void *a, const void *b)
{
return g_strcmp0(object_get_canonical_path_component(*(Object **)a),
object_get_canonical_path_component(*(Object **)b));
}
static int insert_qom_composition_child(Object *obj, void *opaque)
{
g_array_append_val(opaque, obj);
return 0;
}
static void print_qom_composition(Monitor *mon, Object *obj, int indent)
{
GArray *children = g_array_new(false, false, sizeof(Object *));
const char *name;
int i;
if (obj == object_get_root()) {
name = "";
} else {
name = object_get_canonical_path_component(obj);
}
monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
object_get_typename(obj));
object_child_foreach(obj, insert_qom_composition_child, children);
g_array_sort(children, qom_composition_compare);
for (i = 0; i < children->len; i++) {
print_qom_composition(mon, g_array_index(children, Object *, i),
indent + 2);
}
g_array_free(children, TRUE);
}
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);
}