char: fold single-user functions in caller
[qemu/ar7.git] / spice-qemu-char.c
blobc7eb306f3443a5b1924cdfc7f1ec0f34324d6d2f
1 #include "qemu/osdep.h"
2 #include "trace.h"
3 #include "ui/qemu-spice.h"
4 #include "sysemu/char.h"
5 #include <spice.h>
6 #include <spice/protocol.h>
9 typedef struct SpiceCharDriver {
10 CharDriverState* chr;
11 SpiceCharDeviceInstance sin;
12 bool active;
13 bool blocked;
14 const uint8_t *datapos;
15 int datalen;
16 QLIST_ENTRY(SpiceCharDriver) next;
17 } SpiceCharDriver;
19 typedef struct SpiceCharSource {
20 GSource source;
21 SpiceCharDriver *scd;
22 } SpiceCharSource;
24 static QLIST_HEAD(, SpiceCharDriver) spice_chars =
25 QLIST_HEAD_INITIALIZER(spice_chars);
27 static int vmc_write(SpiceCharDeviceInstance *sin, const uint8_t *buf, int len)
29 SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin);
30 ssize_t out = 0;
31 ssize_t last_out;
32 uint8_t* p = (uint8_t*)buf;
34 while (len > 0) {
35 int can_write = qemu_chr_be_can_write(scd->chr);
36 last_out = MIN(len, can_write);
37 if (last_out <= 0) {
38 break;
40 qemu_chr_be_write(scd->chr, p, last_out);
41 out += last_out;
42 len -= last_out;
43 p += last_out;
46 trace_spice_vmc_write(out, len + out);
47 return out;
50 static int vmc_read(SpiceCharDeviceInstance *sin, uint8_t *buf, int len)
52 SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin);
53 int bytes = MIN(len, scd->datalen);
55 if (bytes > 0) {
56 memcpy(buf, scd->datapos, bytes);
57 scd->datapos += bytes;
58 scd->datalen -= bytes;
59 assert(scd->datalen >= 0);
61 if (scd->datalen == 0) {
62 scd->datapos = 0;
63 scd->blocked = false;
65 trace_spice_vmc_read(bytes, len);
66 return bytes;
69 #if SPICE_SERVER_VERSION >= 0x000c02
70 static void vmc_event(SpiceCharDeviceInstance *sin, uint8_t event)
72 SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin);
73 int chr_event;
75 switch (event) {
76 case SPICE_PORT_EVENT_BREAK:
77 chr_event = CHR_EVENT_BREAK;
78 break;
79 default:
80 return;
83 trace_spice_vmc_event(chr_event);
84 qemu_chr_be_event(scd->chr, chr_event);
86 #endif
88 static void vmc_state(SpiceCharDeviceInstance *sin, int connected)
90 SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin);
92 if ((scd->chr->be_open && connected) ||
93 (!scd->chr->be_open && !connected)) {
94 return;
97 qemu_chr_be_event(scd->chr,
98 connected ? CHR_EVENT_OPENED : CHR_EVENT_CLOSED);
101 static SpiceCharDeviceInterface vmc_interface = {
102 .base.type = SPICE_INTERFACE_CHAR_DEVICE,
103 .base.description = "spice virtual channel char device",
104 .base.major_version = SPICE_INTERFACE_CHAR_DEVICE_MAJOR,
105 .base.minor_version = SPICE_INTERFACE_CHAR_DEVICE_MINOR,
106 .state = vmc_state,
107 .write = vmc_write,
108 .read = vmc_read,
109 #if SPICE_SERVER_VERSION >= 0x000c02
110 .event = vmc_event,
111 #endif
112 #if SPICE_SERVER_VERSION >= 0x000c06
113 .flags = SPICE_CHAR_DEVICE_NOTIFY_WRITABLE,
114 #endif
118 static void vmc_register_interface(SpiceCharDriver *scd)
120 if (scd->active) {
121 return;
123 scd->sin.base.sif = &vmc_interface.base;
124 qemu_spice_add_interface(&scd->sin.base);
125 scd->active = true;
126 trace_spice_vmc_register_interface(scd);
129 static void vmc_unregister_interface(SpiceCharDriver *scd)
131 if (!scd->active) {
132 return;
134 spice_server_remove_interface(&scd->sin.base);
135 scd->active = false;
136 trace_spice_vmc_unregister_interface(scd);
139 static gboolean spice_char_source_prepare(GSource *source, gint *timeout)
141 SpiceCharSource *src = (SpiceCharSource *)source;
143 *timeout = -1;
145 return !src->scd->blocked;
148 static gboolean spice_char_source_check(GSource *source)
150 SpiceCharSource *src = (SpiceCharSource *)source;
152 return !src->scd->blocked;
155 static gboolean spice_char_source_dispatch(GSource *source,
156 GSourceFunc callback, gpointer user_data)
158 GIOFunc func = (GIOFunc)callback;
160 return func(NULL, G_IO_OUT, user_data);
163 static GSourceFuncs SpiceCharSourceFuncs = {
164 .prepare = spice_char_source_prepare,
165 .check = spice_char_source_check,
166 .dispatch = spice_char_source_dispatch,
169 static GSource *spice_chr_add_watch(CharDriverState *chr, GIOCondition cond)
171 SpiceCharDriver *scd = chr->opaque;
172 SpiceCharSource *src;
174 assert(cond & G_IO_OUT);
176 src = (SpiceCharSource *)g_source_new(&SpiceCharSourceFuncs,
177 sizeof(SpiceCharSource));
178 src->scd = scd;
180 return (GSource *)src;
183 static int spice_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
185 SpiceCharDriver *s = chr->opaque;
186 int read_bytes;
188 assert(s->datalen == 0);
189 s->datapos = buf;
190 s->datalen = len;
191 spice_server_char_device_wakeup(&s->sin);
192 read_bytes = len - s->datalen;
193 if (read_bytes != len) {
194 /* We'll get passed in the unconsumed data with the next call */
195 s->datalen = 0;
196 s->datapos = NULL;
197 s->blocked = true;
199 return read_bytes;
202 static void spice_chr_free(struct CharDriverState *chr)
204 SpiceCharDriver *s = chr->opaque;
206 vmc_unregister_interface(s);
207 QLIST_REMOVE(s, next);
209 g_free((char *)s->sin.subtype);
210 #if SPICE_SERVER_VERSION >= 0x000c02
211 g_free((char *)s->sin.portname);
212 #endif
213 g_free(s);
216 static void spice_vmc_set_fe_open(struct CharDriverState *chr, int fe_open)
218 SpiceCharDriver *s = chr->opaque;
219 if (fe_open) {
220 vmc_register_interface(s);
221 } else {
222 vmc_unregister_interface(s);
226 static void spice_port_set_fe_open(struct CharDriverState *chr, int fe_open)
228 #if SPICE_SERVER_VERSION >= 0x000c02
229 SpiceCharDriver *s = chr->opaque;
231 if (fe_open) {
232 spice_server_port_event(&s->sin, SPICE_PORT_EVENT_OPENED);
233 } else {
234 spice_server_port_event(&s->sin, SPICE_PORT_EVENT_CLOSED);
236 #endif
239 static void print_allowed_subtypes(void)
241 const char** psubtype;
242 int i;
244 fprintf(stderr, "allowed names: ");
245 for(i=0, psubtype = spice_server_char_device_recognized_subtypes();
246 *psubtype != NULL; ++psubtype, ++i) {
247 if (i == 0) {
248 fprintf(stderr, "%s", *psubtype);
249 } else {
250 fprintf(stderr, ", %s", *psubtype);
253 fprintf(stderr, "\n");
256 static void spice_chr_accept_input(struct CharDriverState *chr)
258 SpiceCharDriver *s = chr->opaque;
260 spice_server_char_device_wakeup(&s->sin);
263 static CharDriverState *chr_open(const CharDriver *driver,
264 const char *subtype,
265 ChardevCommon *backend,
266 Error **errp)
268 CharDriverState *chr;
269 SpiceCharDriver *s;
271 chr = qemu_chr_alloc(driver, backend, errp);
272 if (!chr) {
273 return NULL;
275 s = g_malloc0(sizeof(SpiceCharDriver));
276 s->chr = chr;
277 s->active = false;
278 s->sin.subtype = g_strdup(subtype);
279 chr->opaque = s;
281 QLIST_INSERT_HEAD(&spice_chars, s, next);
283 return chr;
286 static CharDriverState *qemu_chr_open_spice_vmc(const CharDriver *driver,
287 const char *id,
288 ChardevBackend *backend,
289 ChardevReturn *ret,
290 bool *be_opened,
291 Error **errp)
293 ChardevSpiceChannel *spicevmc = backend->u.spicevmc.data;
294 const char *type = spicevmc->type;
295 const char **psubtype = spice_server_char_device_recognized_subtypes();
296 ChardevCommon *common = qapi_ChardevSpiceChannel_base(spicevmc);
298 for (; *psubtype != NULL; ++psubtype) {
299 if (strcmp(type, *psubtype) == 0) {
300 break;
303 if (*psubtype == NULL) {
304 fprintf(stderr, "spice-qemu-char: unsupported type: %s\n", type);
305 print_allowed_subtypes();
306 return NULL;
309 *be_opened = false;
310 return chr_open(driver, type, common, errp);
313 #if SPICE_SERVER_VERSION >= 0x000c02
314 static CharDriverState *qemu_chr_open_spice_port(const CharDriver *driver,
315 const char *id,
316 ChardevBackend *backend,
317 ChardevReturn *ret,
318 bool *be_opened,
319 Error **errp)
321 ChardevSpicePort *spiceport = backend->u.spiceport.data;
322 const char *name = spiceport->fqdn;
323 ChardevCommon *common = qapi_ChardevSpicePort_base(spiceport);
324 CharDriverState *chr;
325 SpiceCharDriver *s;
327 if (name == NULL) {
328 fprintf(stderr, "spice-qemu-char: missing name parameter\n");
329 return NULL;
332 chr = chr_open(driver, "port", common, errp);
333 if (!chr) {
334 return NULL;
336 *be_opened = false;
337 s = chr->opaque;
338 s->sin.portname = g_strdup(name);
340 return chr;
343 void qemu_spice_register_ports(void)
345 SpiceCharDriver *s;
347 QLIST_FOREACH(s, &spice_chars, next) {
348 if (s->sin.portname == NULL) {
349 continue;
351 vmc_register_interface(s);
354 #endif
356 static void qemu_chr_parse_spice_vmc(QemuOpts *opts, ChardevBackend *backend,
357 Error **errp)
359 const char *name = qemu_opt_get(opts, "name");
360 ChardevSpiceChannel *spicevmc;
362 if (name == NULL) {
363 error_setg(errp, "chardev: spice channel: no name given");
364 return;
366 spicevmc = backend->u.spicevmc.data = g_new0(ChardevSpiceChannel, 1);
367 qemu_chr_parse_common(opts, qapi_ChardevSpiceChannel_base(spicevmc));
368 spicevmc->type = g_strdup(name);
371 static void qemu_chr_parse_spice_port(QemuOpts *opts, ChardevBackend *backend,
372 Error **errp)
374 const char *name = qemu_opt_get(opts, "name");
375 ChardevSpicePort *spiceport;
377 if (name == NULL) {
378 error_setg(errp, "chardev: spice port: no name given");
379 return;
381 spiceport = backend->u.spiceport.data = g_new0(ChardevSpicePort, 1);
382 qemu_chr_parse_common(opts, qapi_ChardevSpicePort_base(spiceport));
383 spiceport->fqdn = g_strdup(name);
386 static void register_types(void)
388 static const CharDriver vmc_driver = {
389 .kind = CHARDEV_BACKEND_KIND_SPICEVMC,
390 .parse = qemu_chr_parse_spice_vmc,
391 .create = qemu_chr_open_spice_vmc,
392 .chr_write = spice_chr_write,
393 .chr_add_watch = spice_chr_add_watch,
394 .chr_set_fe_open = spice_vmc_set_fe_open,
395 .chr_accept_input = spice_chr_accept_input,
396 .chr_free = spice_chr_free,
398 static const CharDriver port_driver = {
399 .kind = CHARDEV_BACKEND_KIND_SPICEPORT,
400 .parse = qemu_chr_parse_spice_port,
401 .create = qemu_chr_open_spice_port,
402 .chr_write = spice_chr_write,
403 .chr_add_watch = spice_chr_add_watch,
404 .chr_set_fe_open = spice_port_set_fe_open,
405 .chr_accept_input = spice_chr_accept_input,
406 .chr_free = spice_chr_free,
408 register_char_driver(&vmc_driver);
409 register_char_driver(&port_driver);
412 type_init(register_types);