hw/net/can: sja1000 ignore CAN FD frames
[qemu.git] / chardev / spice.c
1 #include "qemu/osdep.h"
2 #include "trace.h"
3 #include "ui/qemu-spice.h"
4 #include "chardev/char.h"
5 #include "chardev/spice.h"
6 #include "qapi/error.h"
7 #include "qemu/error-report.h"
8 #include "qemu/module.h"
9 #include "qemu/option.h"
10 #include <spice/protocol.h>
11
12 typedef struct SpiceCharSource {
13 GSource source;
14 SpiceChardev *scd;
15 } SpiceCharSource;
16
17 static QLIST_HEAD(, SpiceChardev) spice_chars =
18 QLIST_HEAD_INITIALIZER(spice_chars);
19
20 static int vmc_write(SpiceCharDeviceInstance *sin, const uint8_t *buf, int len)
21 {
22 SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
23 Chardev *chr = CHARDEV(scd);
24 ssize_t out = 0;
25 ssize_t last_out;
26 uint8_t* p = (uint8_t*)buf;
27
28 while (len > 0) {
29 int can_write = qemu_chr_be_can_write(chr);
30 last_out = MIN(len, can_write);
31 if (last_out <= 0) {
32 break;
33 }
34 qemu_chr_be_write(chr, p, last_out);
35 out += last_out;
36 len -= last_out;
37 p += last_out;
38 }
39
40 trace_spice_vmc_write(out, len + out);
41 return out;
42 }
43
44 static int vmc_read(SpiceCharDeviceInstance *sin, uint8_t *buf, int len)
45 {
46 SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
47 int bytes = MIN(len, scd->datalen);
48
49 if (bytes > 0) {
50 memcpy(buf, scd->datapos, bytes);
51 scd->datapos += bytes;
52 scd->datalen -= bytes;
53 assert(scd->datalen >= 0);
54 }
55 if (scd->datalen == 0) {
56 scd->datapos = 0;
57 scd->blocked = false;
58 }
59 trace_spice_vmc_read(bytes, len);
60 return bytes;
61 }
62
63 static void vmc_event(SpiceCharDeviceInstance *sin, uint8_t event)
64 {
65 SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
66 Chardev *chr = CHARDEV(scd);
67 int chr_event;
68
69 switch (event) {
70 case SPICE_PORT_EVENT_BREAK:
71 chr_event = CHR_EVENT_BREAK;
72 break;
73 default:
74 return;
75 }
76
77 trace_spice_vmc_event(chr_event);
78 qemu_chr_be_event(chr, chr_event);
79 }
80
81 static void vmc_state(SpiceCharDeviceInstance *sin, int connected)
82 {
83 SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
84 Chardev *chr = CHARDEV(scd);
85
86 if ((chr->be_open && connected) ||
87 (!chr->be_open && !connected)) {
88 return;
89 }
90
91 qemu_chr_be_event(chr,
92 connected ? CHR_EVENT_OPENED : CHR_EVENT_CLOSED);
93 }
94
95 static SpiceCharDeviceInterface vmc_interface = {
96 .base.type = SPICE_INTERFACE_CHAR_DEVICE,
97 .base.description = "spice virtual channel char device",
98 .base.major_version = SPICE_INTERFACE_CHAR_DEVICE_MAJOR,
99 .base.minor_version = SPICE_INTERFACE_CHAR_DEVICE_MINOR,
100 .state = vmc_state,
101 .write = vmc_write,
102 .read = vmc_read,
103 .event = vmc_event,
104 #if SPICE_SERVER_VERSION >= 0x000c06
105 .flags = SPICE_CHAR_DEVICE_NOTIFY_WRITABLE,
106 #endif
107 };
108
109
110 static void vmc_register_interface(SpiceChardev *scd)
111 {
112 if (scd->active) {
113 return;
114 }
115 scd->sin.base.sif = &vmc_interface.base;
116 qemu_spice_add_interface(&scd->sin.base);
117 scd->active = true;
118 trace_spice_vmc_register_interface(scd);
119 }
120
121 static void vmc_unregister_interface(SpiceChardev *scd)
122 {
123 if (!scd->active) {
124 return;
125 }
126 spice_server_remove_interface(&scd->sin.base);
127 scd->active = false;
128 trace_spice_vmc_unregister_interface(scd);
129 }
130
131 static gboolean spice_char_source_prepare(GSource *source, gint *timeout)
132 {
133 SpiceCharSource *src = (SpiceCharSource *)source;
134 Chardev *chr = CHARDEV(src->scd);
135
136 *timeout = -1;
137
138 if (!chr->be_open) {
139 return true;
140 }
141
142 return !src->scd->blocked;
143 }
144
145 static gboolean spice_char_source_check(GSource *source)
146 {
147 SpiceCharSource *src = (SpiceCharSource *)source;
148 Chardev *chr = CHARDEV(src->scd);
149
150 if (!chr->be_open) {
151 return true;
152 }
153
154 return !src->scd->blocked;
155 }
156
157 static gboolean spice_char_source_dispatch(GSource *source,
158 GSourceFunc callback, gpointer user_data)
159 {
160 SpiceCharSource *src = (SpiceCharSource *)source;
161 Chardev *chr = CHARDEV(src->scd);
162 GIOFunc func = (GIOFunc)callback;
163 GIOCondition cond = chr->be_open ? G_IO_OUT : G_IO_HUP;
164
165 return func(NULL, cond, user_data);
166 }
167
168 static GSourceFuncs SpiceCharSourceFuncs = {
169 .prepare = spice_char_source_prepare,
170 .check = spice_char_source_check,
171 .dispatch = spice_char_source_dispatch,
172 };
173
174 static GSource *spice_chr_add_watch(Chardev *chr, GIOCondition cond)
175 {
176 SpiceChardev *scd = SPICE_CHARDEV(chr);
177 SpiceCharSource *src;
178
179 assert(cond & G_IO_OUT);
180
181 src = (SpiceCharSource *)g_source_new(&SpiceCharSourceFuncs,
182 sizeof(SpiceCharSource));
183 src->scd = scd;
184
185 return (GSource *)src;
186 }
187
188 static int spice_chr_write(Chardev *chr, const uint8_t *buf, int len)
189 {
190 SpiceChardev *s = SPICE_CHARDEV(chr);
191 int read_bytes;
192
193 assert(s->datalen == 0);
194
195 if (!chr->be_open) {
196 trace_spice_chr_discard_write(len);
197 return len;
198 }
199
200 s->datapos = buf;
201 s->datalen = len;
202 spice_server_char_device_wakeup(&s->sin);
203 read_bytes = len - s->datalen;
204 if (read_bytes != len) {
205 /* We'll get passed in the unconsumed data with the next call */
206 s->datalen = 0;
207 s->datapos = NULL;
208 s->blocked = true;
209 }
210 return read_bytes;
211 }
212
213 static void char_spice_finalize(Object *obj)
214 {
215 SpiceChardev *s = SPICE_CHARDEV(obj);
216
217 vmc_unregister_interface(s);
218
219 QLIST_SAFE_REMOVE(s, next);
220
221 g_free((char *)s->sin.subtype);
222 g_free((char *)s->sin.portname);
223 }
224
225 static void spice_vmc_set_fe_open(struct Chardev *chr, int fe_open)
226 {
227 SpiceChardev *s = SPICE_CHARDEV(chr);
228 if (fe_open) {
229 vmc_register_interface(s);
230 } else {
231 vmc_unregister_interface(s);
232 }
233 }
234
235 static void spice_port_set_fe_open(struct Chardev *chr, int fe_open)
236 {
237 SpiceChardev *s = SPICE_CHARDEV(chr);
238
239 if (fe_open) {
240 spice_server_port_event(&s->sin, SPICE_PORT_EVENT_OPENED);
241 } else {
242 spice_server_port_event(&s->sin, SPICE_PORT_EVENT_CLOSED);
243 }
244 }
245
246 static void spice_chr_accept_input(struct Chardev *chr)
247 {
248 SpiceChardev *s = SPICE_CHARDEV(chr);
249
250 spice_server_char_device_wakeup(&s->sin);
251 }
252
253 static void chr_open(Chardev *chr, const char *subtype)
254 {
255 SpiceChardev *s = SPICE_CHARDEV(chr);
256
257 s->active = false;
258 s->sin.subtype = g_strdup(subtype);
259
260 QLIST_INSERT_HEAD(&spice_chars, s, next);
261 }
262
263 static void qemu_chr_open_spice_vmc(Chardev *chr,
264 ChardevBackend *backend,
265 bool *be_opened,
266 Error **errp)
267 {
268 ChardevSpiceChannel *spicevmc = backend->u.spicevmc.data;
269 const char *type = spicevmc->type;
270 const char **psubtype = spice_server_char_device_recognized_subtypes();
271
272 for (; *psubtype != NULL; ++psubtype) {
273 if (strcmp(type, *psubtype) == 0) {
274 break;
275 }
276 }
277 if (*psubtype == NULL) {
278 char *subtypes = g_strjoinv(", ",
279 (gchar **)spice_server_char_device_recognized_subtypes());
280
281 error_setg(errp, "unsupported type name: %s", type);
282 error_append_hint(errp, "allowed spice char type names: %s\n",
283 subtypes);
284
285 g_free(subtypes);
286 return;
287 }
288
289 *be_opened = false;
290 #if SPICE_SERVER_VERSION < 0x000e02
291 /* Spice < 0.14.2 doesn't explicitly open smartcard chardev */
292 if (strcmp(type, "smartcard") == 0) {
293 *be_opened = true;
294 }
295 #endif
296 chr_open(chr, type);
297 }
298
299 void qemu_chr_open_spice_port(Chardev *chr,
300 ChardevBackend *backend,
301 bool *be_opened,
302 Error **errp)
303 {
304 ChardevSpicePort *spiceport = backend->u.spiceport.data;
305 const char *name = spiceport->fqdn;
306 SpiceChardev *s;
307
308 if (name == NULL) {
309 error_setg(errp, "missing name parameter");
310 return;
311 }
312
313 chr_open(chr, "port");
314
315 *be_opened = false;
316 s = SPICE_CHARDEV(chr);
317 s->sin.portname = g_strdup(name);
318
319 if (using_spice) {
320 /* spice server already created */
321 vmc_register_interface(s);
322 }
323 }
324
325 void qemu_spice_register_ports(void)
326 {
327 SpiceChardev *s;
328
329 QLIST_FOREACH(s, &spice_chars, next) {
330 if (s->sin.portname == NULL) {
331 continue;
332 }
333 vmc_register_interface(s);
334 }
335 }
336
337 static void qemu_chr_parse_spice_vmc(QemuOpts *opts, ChardevBackend *backend,
338 Error **errp)
339 {
340 const char *name = qemu_opt_get(opts, "name");
341 ChardevSpiceChannel *spicevmc;
342
343 if (name == NULL) {
344 error_setg(errp, "chardev: spice channel: no name given");
345 return;
346 }
347 backend->type = CHARDEV_BACKEND_KIND_SPICEVMC;
348 spicevmc = backend->u.spicevmc.data = g_new0(ChardevSpiceChannel, 1);
349 qemu_chr_parse_common(opts, qapi_ChardevSpiceChannel_base(spicevmc));
350 spicevmc->type = g_strdup(name);
351 }
352
353 static void qemu_chr_parse_spice_port(QemuOpts *opts, ChardevBackend *backend,
354 Error **errp)
355 {
356 const char *name = qemu_opt_get(opts, "name");
357 ChardevSpicePort *spiceport;
358
359 if (name == NULL) {
360 error_setg(errp, "chardev: spice port: no name given");
361 return;
362 }
363 backend->type = CHARDEV_BACKEND_KIND_SPICEPORT;
364 spiceport = backend->u.spiceport.data = g_new0(ChardevSpicePort, 1);
365 qemu_chr_parse_common(opts, qapi_ChardevSpicePort_base(spiceport));
366 spiceport->fqdn = g_strdup(name);
367 }
368
369 static void char_spice_class_init(ObjectClass *oc, void *data)
370 {
371 ChardevClass *cc = CHARDEV_CLASS(oc);
372
373 cc->chr_write = spice_chr_write;
374 cc->chr_add_watch = spice_chr_add_watch;
375 cc->chr_accept_input = spice_chr_accept_input;
376 }
377
378 static const TypeInfo char_spice_type_info = {
379 .name = TYPE_CHARDEV_SPICE,
380 .parent = TYPE_CHARDEV,
381 .instance_size = sizeof(SpiceChardev),
382 .instance_finalize = char_spice_finalize,
383 .class_init = char_spice_class_init,
384 .abstract = true,
385 };
386
387 static void char_spicevmc_class_init(ObjectClass *oc, void *data)
388 {
389 ChardevClass *cc = CHARDEV_CLASS(oc);
390
391 cc->parse = qemu_chr_parse_spice_vmc;
392 cc->open = qemu_chr_open_spice_vmc;
393 cc->chr_set_fe_open = spice_vmc_set_fe_open;
394 }
395
396 static const TypeInfo char_spicevmc_type_info = {
397 .name = TYPE_CHARDEV_SPICEVMC,
398 .parent = TYPE_CHARDEV_SPICE,
399 .class_init = char_spicevmc_class_init,
400 };
401
402 static void char_spiceport_class_init(ObjectClass *oc, void *data)
403 {
404 ChardevClass *cc = CHARDEV_CLASS(oc);
405
406 cc->parse = qemu_chr_parse_spice_port;
407 cc->open = qemu_chr_open_spice_port;
408 cc->chr_set_fe_open = spice_port_set_fe_open;
409 }
410
411 static const TypeInfo char_spiceport_type_info = {
412 .name = TYPE_CHARDEV_SPICEPORT,
413 .parent = TYPE_CHARDEV_SPICE,
414 .class_init = char_spiceport_class_init,
415 };
416
417 static void register_types(void)
418 {
419 type_register_static(&char_spice_type_info);
420 type_register_static(&char_spicevmc_type_info);
421 type_register_static(&char_spiceport_type_info);
422 }
423
424 type_init(register_types);