trap signals for "-serial mon:stdio"
[qemu.git] / spice-qemu-char.c
1 #include "config-host.h"
2 #include "trace.h"
3 #include "ui/qemu-spice.h"
4 #include "sysemu/char.h"
5 #include <spice.h>
6 #include <spice-experimental.h>
7 #include <spice/protocol.h>
8
9 #include "qemu/osdep.h"
10
11 typedef struct SpiceCharDriver {
12 CharDriverState* chr;
13 SpiceCharDeviceInstance sin;
14 char *subtype;
15 bool active;
16 bool blocked;
17 const uint8_t *datapos;
18 int datalen;
19 QLIST_ENTRY(SpiceCharDriver) next;
20 } SpiceCharDriver;
21
22 typedef struct SpiceCharSource {
23 GSource source;
24 SpiceCharDriver *scd;
25 } SpiceCharSource;
26
27 static QLIST_HEAD(, SpiceCharDriver) spice_chars =
28 QLIST_HEAD_INITIALIZER(spice_chars);
29
30 static int vmc_write(SpiceCharDeviceInstance *sin, const uint8_t *buf, int len)
31 {
32 SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin);
33 ssize_t out = 0;
34 ssize_t last_out;
35 uint8_t* p = (uint8_t*)buf;
36
37 while (len > 0) {
38 int can_write = qemu_chr_be_can_write(scd->chr);
39 last_out = MIN(len, can_write);
40 if (last_out <= 0) {
41 break;
42 }
43 qemu_chr_be_write(scd->chr, p, last_out);
44 out += last_out;
45 len -= last_out;
46 p += last_out;
47 }
48
49 trace_spice_vmc_write(out, len + out);
50 return out;
51 }
52
53 static int vmc_read(SpiceCharDeviceInstance *sin, uint8_t *buf, int len)
54 {
55 SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin);
56 int bytes = MIN(len, scd->datalen);
57
58 if (bytes > 0) {
59 memcpy(buf, scd->datapos, bytes);
60 scd->datapos += bytes;
61 scd->datalen -= bytes;
62 assert(scd->datalen >= 0);
63 }
64 if (scd->datalen == 0) {
65 scd->datapos = 0;
66 scd->blocked = false;
67 }
68 trace_spice_vmc_read(bytes, len);
69 return bytes;
70 }
71
72 #if SPICE_SERVER_VERSION >= 0x000c02
73 static void vmc_event(SpiceCharDeviceInstance *sin, uint8_t event)
74 {
75 SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin);
76 int chr_event;
77
78 switch (event) {
79 case SPICE_PORT_EVENT_BREAK:
80 chr_event = CHR_EVENT_BREAK;
81 break;
82 default:
83 return;
84 }
85
86 trace_spice_vmc_event(chr_event);
87 qemu_chr_be_event(scd->chr, chr_event);
88 }
89 #endif
90
91 static void vmc_state(SpiceCharDeviceInstance *sin, int connected)
92 {
93 SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin);
94
95 if ((scd->chr->be_open && connected) ||
96 (!scd->chr->be_open && !connected)) {
97 return;
98 }
99
100 qemu_chr_be_event(scd->chr,
101 connected ? CHR_EVENT_OPENED : CHR_EVENT_CLOSED);
102 }
103
104 static SpiceCharDeviceInterface vmc_interface = {
105 .base.type = SPICE_INTERFACE_CHAR_DEVICE,
106 .base.description = "spice virtual channel char device",
107 .base.major_version = SPICE_INTERFACE_CHAR_DEVICE_MAJOR,
108 .base.minor_version = SPICE_INTERFACE_CHAR_DEVICE_MINOR,
109 .state = vmc_state,
110 .write = vmc_write,
111 .read = vmc_read,
112 #if SPICE_SERVER_VERSION >= 0x000c02
113 .event = vmc_event,
114 #endif
115 };
116
117
118 static void vmc_register_interface(SpiceCharDriver *scd)
119 {
120 if (scd->active) {
121 return;
122 }
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);
127 }
128
129 static void vmc_unregister_interface(SpiceCharDriver *scd)
130 {
131 if (!scd->active) {
132 return;
133 }
134 spice_server_remove_interface(&scd->sin.base);
135 scd->active = false;
136 trace_spice_vmc_unregister_interface(scd);
137 }
138
139 static gboolean spice_char_source_prepare(GSource *source, gint *timeout)
140 {
141 SpiceCharSource *src = (SpiceCharSource *)source;
142
143 *timeout = -1;
144
145 return !src->scd->blocked;
146 }
147
148 static gboolean spice_char_source_check(GSource *source)
149 {
150 SpiceCharSource *src = (SpiceCharSource *)source;
151
152 return !src->scd->blocked;
153 }
154
155 static gboolean spice_char_source_dispatch(GSource *source,
156 GSourceFunc callback, gpointer user_data)
157 {
158 GIOFunc func = (GIOFunc)callback;
159
160 return func(NULL, G_IO_OUT, user_data);
161 }
162
163 GSourceFuncs SpiceCharSourceFuncs = {
164 .prepare = spice_char_source_prepare,
165 .check = spice_char_source_check,
166 .dispatch = spice_char_source_dispatch,
167 };
168
169 static GSource *spice_chr_add_watch(CharDriverState *chr, GIOCondition cond)
170 {
171 SpiceCharDriver *scd = chr->opaque;
172 SpiceCharSource *src;
173
174 assert(cond == G_IO_OUT);
175
176 src = (SpiceCharSource *)g_source_new(&SpiceCharSourceFuncs,
177 sizeof(SpiceCharSource));
178 src->scd = scd;
179
180 return (GSource *)src;
181 }
182
183 static int spice_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
184 {
185 SpiceCharDriver *s = chr->opaque;
186 int read_bytes;
187
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;
198 }
199 return read_bytes;
200 }
201
202 static void spice_chr_close(struct CharDriverState *chr)
203 {
204 SpiceCharDriver *s = chr->opaque;
205
206 vmc_unregister_interface(s);
207 QLIST_REMOVE(s, next);
208
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);
214 }
215
216 static void spice_chr_set_fe_open(struct CharDriverState *chr, int fe_open)
217 {
218 SpiceCharDriver *s = chr->opaque;
219 if (fe_open) {
220 vmc_register_interface(s);
221 } else {
222 vmc_unregister_interface(s);
223 }
224 }
225
226 static void print_allowed_subtypes(void)
227 {
228 const char** psubtype;
229 int i;
230
231 fprintf(stderr, "allowed names: ");
232 for(i=0, psubtype = spice_server_char_device_recognized_subtypes();
233 *psubtype != NULL; ++psubtype, ++i) {
234 if (i == 0) {
235 fprintf(stderr, "%s", *psubtype);
236 } else {
237 fprintf(stderr, ", %s", *psubtype);
238 }
239 }
240 fprintf(stderr, "\n");
241 }
242
243 static CharDriverState *chr_open(const char *subtype)
244 {
245 CharDriverState *chr;
246 SpiceCharDriver *s;
247
248 chr = g_malloc0(sizeof(CharDriverState));
249 s = g_malloc0(sizeof(SpiceCharDriver));
250 s->chr = chr;
251 s->active = false;
252 s->sin.subtype = g_strdup(subtype);
253 chr->opaque = s;
254 chr->chr_write = spice_chr_write;
255 chr->chr_add_watch = spice_chr_add_watch;
256 chr->chr_close = spice_chr_close;
257 chr->chr_set_fe_open = spice_chr_set_fe_open;
258 chr->explicit_be_open = true;
259
260 QLIST_INSERT_HEAD(&spice_chars, s, next);
261
262 return chr;
263 }
264
265 CharDriverState *qemu_chr_open_spice_vmc(const char *type)
266 {
267 const char **psubtype = spice_server_char_device_recognized_subtypes();
268
269 if (type == NULL) {
270 fprintf(stderr, "spice-qemu-char: missing name parameter\n");
271 print_allowed_subtypes();
272 return NULL;
273 }
274 for (; *psubtype != NULL; ++psubtype) {
275 if (strcmp(type, *psubtype) == 0) {
276 break;
277 }
278 }
279 if (*psubtype == NULL) {
280 fprintf(stderr, "spice-qemu-char: unsupported type: %s\n", type);
281 print_allowed_subtypes();
282 return NULL;
283 }
284
285 return chr_open(type);
286 }
287
288 #if SPICE_SERVER_VERSION >= 0x000c02
289 CharDriverState *qemu_chr_open_spice_port(const char *name)
290 {
291 CharDriverState *chr;
292 SpiceCharDriver *s;
293
294 if (name == NULL) {
295 fprintf(stderr, "spice-qemu-char: missing name parameter\n");
296 return NULL;
297 }
298
299 chr = chr_open("port");
300 s = chr->opaque;
301 s->sin.portname = g_strdup(name);
302
303 return chr;
304 }
305
306 void qemu_spice_register_ports(void)
307 {
308 SpiceCharDriver *s;
309
310 QLIST_FOREACH(s, &spice_chars, next) {
311 if (s->sin.portname == NULL) {
312 continue;
313 }
314 vmc_register_interface(s);
315 }
316 }
317 #endif
318
319 static void qemu_chr_parse_spice_vmc(QemuOpts *opts, ChardevBackend *backend,
320 Error **errp)
321 {
322 const char *name = qemu_opt_get(opts, "name");
323
324 if (name == NULL) {
325 error_setg(errp, "chardev: spice channel: no name given");
326 return;
327 }
328 backend->spicevmc = g_new0(ChardevSpiceChannel, 1);
329 backend->spicevmc->type = g_strdup(name);
330 }
331
332 static void qemu_chr_parse_spice_port(QemuOpts *opts, ChardevBackend *backend,
333 Error **errp)
334 {
335 const char *name = qemu_opt_get(opts, "name");
336
337 if (name == NULL) {
338 error_setg(errp, "chardev: spice port: no name given");
339 return;
340 }
341 backend->spiceport = g_new0(ChardevSpicePort, 1);
342 backend->spiceport->fqdn = g_strdup(name);
343 }
344
345 static void register_types(void)
346 {
347 register_char_driver_qapi("spicevmc", CHARDEV_BACKEND_KIND_SPICEVMC,
348 qemu_chr_parse_spice_vmc);
349 register_char_driver_qapi("spiceport", CHARDEV_BACKEND_KIND_SPICEPORT,
350 qemu_chr_parse_spice_port);
351 }
352
353 type_init(register_types);