hw/riscv: virt: Create a platform bus
[qemu/ar7.git] / ui / dbus-chardev.c
blob940ef937cdf11c933284189c7a18d4097e1a27ab
1 /*
2 * QEMU DBus display
4 * Copyright (c) 2021 Marc-André Lureau <marcandre.lureau@redhat.com>
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
24 #include "qemu/osdep.h"
25 #include "trace.h"
26 #include "qapi/error.h"
27 #include "qemu/config-file.h"
28 #include "qemu/option.h"
30 #include <gio/gunixfdlist.h>
32 #include "dbus.h"
34 static char *
35 dbus_display_chardev_path(DBusChardev *chr)
37 return g_strdup_printf(DBUS_DISPLAY1_ROOT "/Chardev_%s",
38 CHARDEV(chr)->label);
41 static void
42 dbus_display_chardev_export(DBusDisplay *dpy, DBusChardev *chr)
44 g_autoptr(GDBusObjectSkeleton) sk = NULL;
45 g_autofree char *path = dbus_display_chardev_path(chr);
47 if (chr->exported) {
48 return;
51 sk = g_dbus_object_skeleton_new(path);
52 g_dbus_object_skeleton_add_interface(
53 sk, G_DBUS_INTERFACE_SKELETON(chr->iface));
54 g_dbus_object_manager_server_export(dpy->server, sk);
55 chr->exported = true;
58 static void
59 dbus_display_chardev_unexport(DBusDisplay *dpy, DBusChardev *chr)
61 g_autofree char *path = dbus_display_chardev_path(chr);
63 if (!chr->exported) {
64 return;
67 g_dbus_object_manager_server_unexport(dpy->server, path);
68 chr->exported = false;
71 static int
72 dbus_display_chardev_foreach(Object *obj, void *data)
74 DBusDisplay *dpy = DBUS_DISPLAY(data);
76 if (!CHARDEV_IS_DBUS(obj)) {
77 return 0;
80 dbus_display_chardev_export(dpy, DBUS_CHARDEV(obj));
82 return 0;
85 static void
86 dbus_display_on_notify(Notifier *notifier, void *data)
88 DBusDisplay *dpy = container_of(notifier, DBusDisplay, notifier);
89 DBusDisplayEvent *event = data;
91 switch (event->type) {
92 case DBUS_DISPLAY_CHARDEV_OPEN:
93 dbus_display_chardev_export(dpy, event->chardev);
94 break;
95 case DBUS_DISPLAY_CHARDEV_CLOSE:
96 dbus_display_chardev_unexport(dpy, event->chardev);
97 break;
101 void
102 dbus_chardev_init(DBusDisplay *dpy)
104 dpy->notifier.notify = dbus_display_on_notify;
105 dbus_display_notifier_add(&dpy->notifier);
107 object_child_foreach(container_get(object_get_root(), "/chardevs"),
108 dbus_display_chardev_foreach, dpy);
111 static gboolean
112 dbus_chr_register(
113 DBusChardev *dc,
114 GDBusMethodInvocation *invocation,
115 GUnixFDList *fd_list,
116 GVariant *arg_stream,
117 QemuDBusDisplay1Chardev *object)
119 g_autoptr(GError) err = NULL;
120 int fd;
122 fd = g_unix_fd_list_get(fd_list, g_variant_get_handle(arg_stream), &err);
123 if (err) {
124 g_dbus_method_invocation_return_error(
125 invocation,
126 DBUS_DISPLAY_ERROR,
127 DBUS_DISPLAY_ERROR_FAILED,
128 "Couldn't get peer FD: %s", err->message);
129 return DBUS_METHOD_INVOCATION_HANDLED;
132 if (qemu_chr_add_client(CHARDEV(dc), fd) < 0) {
133 g_dbus_method_invocation_return_error(invocation,
134 DBUS_DISPLAY_ERROR,
135 DBUS_DISPLAY_ERROR_FAILED,
136 "Couldn't register FD!");
137 close(fd);
138 return DBUS_METHOD_INVOCATION_HANDLED;
141 g_object_set(dc->iface,
142 "owner", g_dbus_method_invocation_get_sender(invocation),
143 NULL);
145 qemu_dbus_display1_chardev_complete_register(object, invocation, NULL);
146 return DBUS_METHOD_INVOCATION_HANDLED;
149 static gboolean
150 dbus_chr_send_break(
151 DBusChardev *dc,
152 GDBusMethodInvocation *invocation,
153 QemuDBusDisplay1Chardev *object)
155 qemu_chr_be_event(CHARDEV(dc), CHR_EVENT_BREAK);
157 qemu_dbus_display1_chardev_complete_send_break(object, invocation);
158 return DBUS_METHOD_INVOCATION_HANDLED;
161 static void
162 dbus_chr_open(Chardev *chr, ChardevBackend *backend,
163 bool *be_opened, Error **errp)
165 ERRP_GUARD();
167 DBusChardev *dc = DBUS_CHARDEV(chr);
168 DBusDisplayEvent event = {
169 .type = DBUS_DISPLAY_CHARDEV_OPEN,
170 .chardev = dc,
172 g_autoptr(ChardevBackend) be = NULL;
173 g_autoptr(QemuOpts) opts = NULL;
175 dc->iface = qemu_dbus_display1_chardev_skeleton_new();
176 g_object_set(dc->iface, "name", backend->u.dbus.data->name, NULL);
177 g_object_connect(dc->iface,
178 "swapped-signal::handle-register",
179 dbus_chr_register, dc,
180 "swapped-signal::handle-send-break",
181 dbus_chr_send_break, dc,
182 NULL);
184 dbus_display_notify(&event);
186 be = g_new0(ChardevBackend, 1);
187 opts = qemu_opts_create(qemu_find_opts("chardev"), NULL, 0, &error_abort);
188 qemu_opt_set(opts, "server", "on", &error_abort);
189 qemu_opt_set(opts, "wait", "off", &error_abort);
190 CHARDEV_CLASS(object_class_by_name(TYPE_CHARDEV_SOCKET))->parse(
191 opts, be, errp);
192 if (*errp) {
193 return;
195 CHARDEV_CLASS(object_class_by_name(TYPE_CHARDEV_SOCKET))->open(
196 chr, be, be_opened, errp);
199 static void
200 dbus_chr_set_fe_open(Chardev *chr, int fe_open)
202 DBusChardev *dc = DBUS_CHARDEV(chr);
204 g_object_set(dc->iface, "feopened", fe_open, NULL);
207 static void
208 dbus_chr_set_echo(Chardev *chr, bool echo)
210 DBusChardev *dc = DBUS_CHARDEV(chr);
212 g_object_set(dc->iface, "echo", echo, NULL);
215 static void
216 dbus_chr_be_event(Chardev *chr, QEMUChrEvent event)
218 DBusChardev *dc = DBUS_CHARDEV(chr);
219 DBusChardevClass *klass = DBUS_CHARDEV_GET_CLASS(chr);
221 switch (event) {
222 case CHR_EVENT_CLOSED:
223 if (dc->iface) {
224 /* on finalize, iface is set to NULL */
225 g_object_set(dc->iface, "owner", "", NULL);
227 break;
228 default:
229 break;
232 klass->parent_chr_be_event(chr, event);
235 static void
236 dbus_chr_parse(QemuOpts *opts, ChardevBackend *backend,
237 Error **errp)
239 const char *name = qemu_opt_get(opts, "name");
240 ChardevDBus *dbus;
242 if (name == NULL) {
243 error_setg(errp, "chardev: dbus: no name given");
244 return;
247 backend->type = CHARDEV_BACKEND_KIND_DBUS;
248 dbus = backend->u.dbus.data = g_new0(ChardevDBus, 1);
249 qemu_chr_parse_common(opts, qapi_ChardevDBus_base(dbus));
250 dbus->name = g_strdup(name);
253 static void
254 char_dbus_class_init(ObjectClass *oc, void *data)
256 DBusChardevClass *klass = DBUS_CHARDEV_CLASS(oc);
257 ChardevClass *cc = CHARDEV_CLASS(oc);
259 cc->parse = dbus_chr_parse;
260 cc->open = dbus_chr_open;
261 cc->chr_set_fe_open = dbus_chr_set_fe_open;
262 cc->chr_set_echo = dbus_chr_set_echo;
263 klass->parent_chr_be_event = cc->chr_be_event;
264 cc->chr_be_event = dbus_chr_be_event;
267 static void
268 char_dbus_finalize(Object *obj)
270 DBusChardev *dc = DBUS_CHARDEV(obj);
271 DBusDisplayEvent event = {
272 .type = DBUS_DISPLAY_CHARDEV_CLOSE,
273 .chardev = dc,
276 dbus_display_notify(&event);
277 g_clear_object(&dc->iface);
280 static const TypeInfo char_dbus_type_info = {
281 .name = TYPE_CHARDEV_DBUS,
282 .parent = TYPE_CHARDEV_SOCKET,
283 .class_size = sizeof(DBusChardevClass),
284 .instance_size = sizeof(DBusChardev),
285 .instance_finalize = char_dbus_finalize,
286 .class_init = char_dbus_class_init,
288 module_obj(TYPE_CHARDEV_DBUS);
290 static void
291 register_types(void)
293 type_register_static(&char_dbus_type_info);
296 type_init(register_types);