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1 | #include "qemu/osdep.h" | |
2 | #include "trace-root.h" | |
3 | #include "ui/qemu-spice.h" | |
4 | #include "sysemu/char.h" | |
5 | #include "qemu/error-report.h" | |
6 | #include <spice.h> | |
7 | #include <spice/protocol.h> | |
8 | ||
9 | ||
10 | typedef 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 | ||
27 | typedef struct SpiceCharSource { | |
28 | GSource source; | |
29 | SpiceChardev *scd; | |
30 | } SpiceCharSource; | |
31 | ||
32 | static QLIST_HEAD(, SpiceChardev) spice_chars = | |
33 | QLIST_HEAD_INITIALIZER(spice_chars); | |
34 | ||
35 | static 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 | ||
59 | static 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 | |
79 | static 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 | ||
98 | static 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 | ||
112 | static 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 | ||
129 | static 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 | ||
140 | static 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 | ||
150 | static 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 | ||
159 | static gboolean spice_char_source_check(GSource *source) | |
160 | { | |
161 | SpiceCharSource *src = (SpiceCharSource *)source; | |
162 | ||
163 | return !src->scd->blocked; | |
164 | } | |
165 | ||
166 | static 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 | ||
174 | static GSourceFuncs SpiceCharSourceFuncs = { | |
175 | .prepare = spice_char_source_prepare, | |
176 | .check = spice_char_source_check, | |
177 | .dispatch = spice_char_source_dispatch, | |
178 | }; | |
179 | ||
180 | static 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 | ||
194 | static 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 | /* 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 | 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 | ||
229 | static 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 | ||
239 | static 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 | ||
252 | static 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 | ||
259 | static 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 | ||
269 | static 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 | |
300 | static 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 | ||
321 | void 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 | ||
334 | static 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 | ||
350 | static 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 | ||
366 | static 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 | ||
375 | static 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 | ||
384 | static 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 | ||
393 | static 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 | ||
399 | static 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 | ||
408 | static 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 | ||
414 | static 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 | ||
421 | type_init(register_types); |