1#include "qemu/osdep.h"
2#include "trace.h"
3#include "ui/qemu-spice.h"
4#include "chardev/char.h"
5#include "qemu/error-report.h"
6#include <spice.h>
7#include <spice/protocol.h>
8
9
10typedef struct SpiceChardev {
11 Chardev parent;
12
13 SpiceCharDeviceInstance sin;
14 bool active;
15 bool blocked;
16 const uint8_t *datapos;
17 int datalen;
18 QLIST_ENTRY(SpiceChardev) next;
19} SpiceChardev;
20
21#define TYPE_CHARDEV_SPICE "chardev-spice"
22#define TYPE_CHARDEV_SPICEVMC "chardev-spicevmc"
23#define TYPE_CHARDEV_SPICEPORT "chardev-spiceport"
24
25#define SPICE_CHARDEV(obj) OBJECT_CHECK(SpiceChardev, (obj), TYPE_CHARDEV_SPICE)
26
27typedef struct SpiceCharSource {
28 GSource source;
29 SpiceChardev *scd;
30} SpiceCharSource;
31
32static QLIST_HEAD(, SpiceChardev) spice_chars =
33 QLIST_HEAD_INITIALIZER(spice_chars);
34
35static int vmc_write(SpiceCharDeviceInstance *sin, const uint8_t *buf, int len)
36{
37 SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
38 Chardev *chr = CHARDEV(scd);
39 ssize_t out = 0;
40 ssize_t last_out;
41 uint8_t* p = (uint8_t*)buf;
42
43 while (len > 0) {
44 int can_write = qemu_chr_be_can_write(chr);
45 last_out = MIN(len, can_write);
46 if (last_out <= 0) {
47 break;
48 }
49 qemu_chr_be_write(chr, p, last_out);
50 out += last_out;
51 len -= last_out;
52 p += last_out;
53 }
54
55 trace_spice_vmc_write(out, len + out);
56 return out;
57}
58
59static int vmc_read(SpiceCharDeviceInstance *sin, uint8_t *buf, int len)
60{
61 SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
62 int bytes = MIN(len, scd->datalen);
63
64 if (bytes > 0) {
65 memcpy(buf, scd->datapos, bytes);
66 scd->datapos += bytes;
67 scd->datalen -= bytes;
68 assert(scd->datalen >= 0);
69 }
70 if (scd->datalen == 0) {
71 scd->datapos = 0;
72 scd->blocked = false;
73 }
74 trace_spice_vmc_read(bytes, len);
75 return bytes;
76}
77
78#if SPICE_SERVER_VERSION >= 0x000c02
79static void vmc_event(SpiceCharDeviceInstance *sin, uint8_t event)
80{
81 SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
82 Chardev *chr = CHARDEV(scd);
83 int chr_event;
84
85 switch (event) {
86 case SPICE_PORT_EVENT_BREAK:
87 chr_event = CHR_EVENT_BREAK;
88 break;
89 default:
90 return;
91 }
92
93 trace_spice_vmc_event(chr_event);
94 qemu_chr_be_event(chr, chr_event);
95}
96#endif
97
98static void vmc_state(SpiceCharDeviceInstance *sin, int connected)
99{
100 SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
101 Chardev *chr = CHARDEV(scd);
102
103 if ((chr->be_open && connected) ||
104 (!chr->be_open && !connected)) {
105 return;
106 }
107
108 qemu_chr_be_event(chr,
109 connected ? CHR_EVENT_OPENED : CHR_EVENT_CLOSED);
110}
111
112static SpiceCharDeviceInterface vmc_interface = {
113 .base.type = SPICE_INTERFACE_CHAR_DEVICE,
114 .base.description = "spice virtual channel char device",
115 .base.major_version = SPICE_INTERFACE_CHAR_DEVICE_MAJOR,
116 .base.minor_version = SPICE_INTERFACE_CHAR_DEVICE_MINOR,
117 .state = vmc_state,
118 .write = vmc_write,
119 .read = vmc_read,
120#if SPICE_SERVER_VERSION >= 0x000c02
121 .event = vmc_event,
122#endif
123#if SPICE_SERVER_VERSION >= 0x000c06
124 .flags = SPICE_CHAR_DEVICE_NOTIFY_WRITABLE,
125#endif
126};
127
128
129static void vmc_register_interface(SpiceChardev *scd)
130{
131 if (scd->active) {
132 return;
133 }
134 scd->sin.base.sif = &vmc_interface.base;
135 qemu_spice_add_interface(&scd->sin.base);
136 scd->active = true;
137 trace_spice_vmc_register_interface(scd);
138}
139
140static void vmc_unregister_interface(SpiceChardev *scd)
141{
142 if (!scd->active) {
143 return;
144 }
145 spice_server_remove_interface(&scd->sin.base);
146 scd->active = false;
147 trace_spice_vmc_unregister_interface(scd);
148}
149
150static gboolean spice_char_source_prepare(GSource *source, gint *timeout)
151{
152 SpiceCharSource *src = (SpiceCharSource *)source;
153
154 *timeout = -1;
155
156 return !src->scd->blocked;
157}
158
159static gboolean spice_char_source_check(GSource *source)
160{
161 SpiceCharSource *src = (SpiceCharSource *)source;
162
163 return !src->scd->blocked;
164}
165
166static gboolean spice_char_source_dispatch(GSource *source,
167 GSourceFunc callback, gpointer user_data)
168{
169 GIOFunc func = (GIOFunc)callback;
170
171 return func(NULL, G_IO_OUT, user_data);
172}
173
174static GSourceFuncs SpiceCharSourceFuncs = {
175 .prepare = spice_char_source_prepare,
176 .check = spice_char_source_check,
177 .dispatch = spice_char_source_dispatch,
178};
179
180static GSource *spice_chr_add_watch(Chardev *chr, GIOCondition cond)
181{
182 SpiceChardev *scd = SPICE_CHARDEV(chr);
183 SpiceCharSource *src;
184
185 assert(cond & G_IO_OUT);
186
187 src = (SpiceCharSource *)g_source_new(&SpiceCharSourceFuncs,
188 sizeof(SpiceCharSource));
189 src->scd = scd;
190
191 return (GSource *)src;
192}
193
194static int spice_chr_write(Chardev *chr, const uint8_t *buf, int len)
195{
196 SpiceChardev *s = SPICE_CHARDEV(chr);
197 int read_bytes;
198
199 assert(s->datalen == 0);
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
206 s->datalen = 0;
207 s->datapos = NULL;
208 s->blocked = true;
209 }
210 return read_bytes;
211}
212
213static void char_spice_finalize(Object *obj)
214{
215 SpiceChardev *s = SPICE_CHARDEV(obj);
216
217 vmc_unregister_interface(s);
218
219 if (s->next.le_prev) {
220 QLIST_REMOVE(s, next);
221 }
222
223 g_free((char *)s->sin.subtype);
224#if SPICE_SERVER_VERSION >= 0x000c02
225 g_free((char *)s->sin.portname);
226#endif
227}
228
229static void spice_vmc_set_fe_open(struct Chardev *chr, int fe_open)
230{
231 SpiceChardev *s = SPICE_CHARDEV(chr);
232 if (fe_open) {
233 vmc_register_interface(s);
234 } else {
235 vmc_unregister_interface(s);
236 }
237}
238
239static void spice_port_set_fe_open(struct Chardev *chr, int fe_open)
240{
241#if SPICE_SERVER_VERSION >= 0x000c02
242 SpiceChardev *s = SPICE_CHARDEV(chr);
243
244 if (fe_open) {
245 spice_server_port_event(&s->sin, SPICE_PORT_EVENT_OPENED);
246 } else {
247 spice_server_port_event(&s->sin, SPICE_PORT_EVENT_CLOSED);
248 }
249#endif
250}
251
252static void spice_chr_accept_input(struct Chardev *chr)
253{
254 SpiceChardev *s = SPICE_CHARDEV(chr);
255
256 spice_server_char_device_wakeup(&s->sin);
257}
258
259static void chr_open(Chardev *chr, const char *subtype)
260{
261 SpiceChardev *s = SPICE_CHARDEV(chr);
262
263 s->active = false;
264 s->sin.subtype = g_strdup(subtype);
265
266 QLIST_INSERT_HEAD(&spice_chars, s, next);
267}
268
269static void qemu_chr_open_spice_vmc(Chardev *chr,
270 ChardevBackend *backend,
271 bool *be_opened,
272 Error **errp)
273{
274 ChardevSpiceChannel *spicevmc = backend->u.spicevmc.data;
275 const char *type = spicevmc->type;
276 const char **psubtype = spice_server_char_device_recognized_subtypes();
277
278 for (; *psubtype != NULL; ++psubtype) {
279 if (strcmp(type, *psubtype) == 0) {
280 break;
281 }
282 }
283 if (*psubtype == NULL) {
284 char *subtypes = g_strjoinv(", ",
285 (gchar **)spice_server_char_device_recognized_subtypes());
286
287 error_setg(errp, "unsupported type name: %s", type);
288 error_append_hint(errp, "allowed spice char type names: %s\n",
289 subtypes);
290
291 g_free(subtypes);
292 return;
293 }
294
295 *be_opened = false;
296 chr_open(chr, type);
297}
298
299#if SPICE_SERVER_VERSION >= 0x000c02
300static void qemu_chr_open_spice_port(Chardev *chr,
301 ChardevBackend *backend,
302 bool *be_opened,
303 Error **errp)
304{
305 ChardevSpicePort *spiceport = backend->u.spiceport.data;
306 const char *name = spiceport->fqdn;
307 SpiceChardev *s;
308
309 if (name == NULL) {
310 error_setg(errp, "missing name parameter");
311 return;
312 }
313
314 chr_open(chr, "port");
315
316 *be_opened = false;
317 s = SPICE_CHARDEV(chr);
318 s->sin.portname = g_strdup(name);
319}
320
321void qemu_spice_register_ports(void)
322{
323 SpiceChardev *s;
324
325 QLIST_FOREACH(s, &spice_chars, next) {
326 if (s->sin.portname == NULL) {
327 continue;
328 }
329 vmc_register_interface(s);
330 }
331}
332#endif
333
334static void qemu_chr_parse_spice_vmc(QemuOpts *opts, ChardevBackend *backend,
335 Error **errp)
336{
337 const char *name = qemu_opt_get(opts, "name");
338 ChardevSpiceChannel *spicevmc;
339
340 if (name == NULL) {
341 error_setg(errp, "chardev: spice channel: no name given");
342 return;
343 }
344 backend->type = CHARDEV_BACKEND_KIND_SPICEVMC;
345 spicevmc = backend->u.spicevmc.data = g_new0(ChardevSpiceChannel, 1);
346 qemu_chr_parse_common(opts, qapi_ChardevSpiceChannel_base(spicevmc));
347 spicevmc->type = g_strdup(name);
348}
349
350static void qemu_chr_parse_spice_port(QemuOpts *opts, ChardevBackend *backend,
351 Error **errp)
352{
353 const char *name = qemu_opt_get(opts, "name");
354 ChardevSpicePort *spiceport;
355
356 if (name == NULL) {
357 error_setg(errp, "chardev: spice port: no name given");
358 return;
359 }
360 backend->type = CHARDEV_BACKEND_KIND_SPICEPORT;
361 spiceport = backend->u.spiceport.data = g_new0(ChardevSpicePort, 1);
362 qemu_chr_parse_common(opts, qapi_ChardevSpicePort_base(spiceport));
363 spiceport->fqdn = g_strdup(name);
364}
365
366static void char_spice_class_init(ObjectClass *oc, void *data)
367{
368 ChardevClass *cc = CHARDEV_CLASS(oc);
369
370 cc->chr_write = spice_chr_write;
371 cc->chr_add_watch = spice_chr_add_watch;
372 cc->chr_accept_input = spice_chr_accept_input;
373}
374
375static const TypeInfo char_spice_type_info = {
376 .name = TYPE_CHARDEV_SPICE,
377 .parent = TYPE_CHARDEV,
378 .instance_size = sizeof(SpiceChardev),
379 .instance_finalize = char_spice_finalize,
380 .class_init = char_spice_class_init,
381 .abstract = true,
382};
383
384static void char_spicevmc_class_init(ObjectClass *oc, void *data)
385{
386 ChardevClass *cc = CHARDEV_CLASS(oc);
387
388 cc->parse = qemu_chr_parse_spice_vmc;
389 cc->open = qemu_chr_open_spice_vmc;
390 cc->chr_set_fe_open = spice_vmc_set_fe_open;
391}
392
393static const TypeInfo char_spicevmc_type_info = {
394 .name = TYPE_CHARDEV_SPICEVMC,
395 .parent = TYPE_CHARDEV_SPICE,
396 .class_init = char_spicevmc_class_init,
397};
398
399static void char_spiceport_class_init(ObjectClass *oc, void *data)
400{
401 ChardevClass *cc = CHARDEV_CLASS(oc);
402
403 cc->parse = qemu_chr_parse_spice_port;
404 cc->open = qemu_chr_open_spice_port;
405 cc->chr_set_fe_open = spice_port_set_fe_open;
406}
407
408static const TypeInfo char_spiceport_type_info = {
409 .name = TYPE_CHARDEV_SPICEPORT,
410 .parent = TYPE_CHARDEV_SPICE,
411 .class_init = char_spiceport_class_init,
412};
413
414static void register_types(void)
415{
416 type_register_static(&char_spice_type_info);
417 type_register_static(&char_spicevmc_type_info);
418 type_register_static(&char_spiceport_type_info);
419}
420
421type_init(register_types);
422
