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Commit | Line | Data |
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6f97dba0 AL |
1 | /* |
2 | * QEMU System Emulator | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
e688df6b | 24 | |
d38ea87a | 25 | #include "qemu/osdep.h" |
f348b6d1 | 26 | #include "qemu/cutils.h" |
83c9089e | 27 | #include "monitor/monitor.h" |
213dcb06 | 28 | #include "qemu/config-file.h" |
d49b6836 | 29 | #include "qemu/error-report.h" |
ef2fd6f1 | 30 | #include "qemu/qemu-print.h" |
8228e353 | 31 | #include "chardev/char.h" |
e688df6b | 32 | #include "qapi/error.h" |
9af23989 | 33 | #include "qapi/qapi-commands-char.h" |
0dd13589 | 34 | #include "qapi/qmp/qerror.h" |
33577b47 | 35 | #include "sysemu/replay.h" |
517b3d40 | 36 | #include "qemu/help_option.h" |
0b8fa32f | 37 | #include "qemu/module.h" |
922a01a0 | 38 | #include "qemu/option.h" |
1e419ee6 | 39 | #include "qemu/id.h" |
2158fa1b | 40 | #include "qemu/coroutine.h" |
feb774ca | 41 | #include "qemu/yank.h" |
6f97dba0 | 42 | |
ffa0f7eb | 43 | #include "chardev-internal.h" |
df85a78b | 44 | |
6f97dba0 AL |
45 | /***********************************************************/ |
46 | /* character device */ | |
47 | ||
30827bad | 48 | Object *get_chardevs_root(void) |
2f5d45a1 MAL |
49 | { |
50 | return container_get(object_get_root(), "/chardevs"); | |
51 | } | |
2970a6c9 | 52 | |
2fa9044a | 53 | static void chr_be_event(Chardev *s, QEMUChrEvent event) |
6f97dba0 | 54 | { |
a4afa548 MAL |
55 | CharBackend *be = s->be; |
56 | ||
d09c4a47 MAL |
57 | if (!be || !be->chr_event) { |
58 | return; | |
59 | } | |
60 | ||
61 | be->chr_event(be->opaque, event); | |
62 | } | |
63 | ||
2fa9044a | 64 | void qemu_chr_be_event(Chardev *s, QEMUChrEvent event) |
d09c4a47 | 65 | { |
73cdf3f2 AG |
66 | /* Keep track if the char device is open */ |
67 | switch (event) { | |
68 | case CHR_EVENT_OPENED: | |
16665b94 | 69 | s->be_open = 1; |
73cdf3f2 AG |
70 | break; |
71 | case CHR_EVENT_CLOSED: | |
16665b94 | 72 | s->be_open = 0; |
73cdf3f2 | 73 | break; |
71f8d3b0 PMD |
74 | case CHR_EVENT_BREAK: |
75 | case CHR_EVENT_MUX_IN: | |
76 | case CHR_EVENT_MUX_OUT: | |
77 | /* Ignore */ | |
78 | break; | |
73cdf3f2 AG |
79 | } |
80 | ||
d09c4a47 | 81 | CHARDEV_GET_CLASS(s)->chr_be_event(s, event); |
6f97dba0 AL |
82 | } |
83 | ||
d0d7708b DB |
84 | /* Not reporting errors from writing to logfile, as logs are |
85 | * defined to be "best effort" only */ | |
a9b1ca38 | 86 | static void qemu_chr_write_log(Chardev *s, const uint8_t *buf, size_t len) |
d0d7708b DB |
87 | { |
88 | size_t done = 0; | |
89 | ssize_t ret; | |
90 | ||
91 | if (s->logfd < 0) { | |
92 | return; | |
93 | } | |
94 | ||
95 | while (done < len) { | |
53628efb DB |
96 | retry: |
97 | ret = write(s->logfd, buf + done, len - done); | |
98 | if (ret == -1 && errno == EAGAIN) { | |
99 | g_usleep(100); | |
100 | goto retry; | |
101 | } | |
d0d7708b DB |
102 | |
103 | if (ret <= 0) { | |
104 | return; | |
105 | } | |
106 | done += ret; | |
107 | } | |
108 | } | |
109 | ||
a9b1ca38 MAL |
110 | static int qemu_chr_write_buffer(Chardev *s, |
111 | const uint8_t *buf, int len, | |
112 | int *offset, bool write_all) | |
33577b47 | 113 | { |
777357d7 | 114 | ChardevClass *cc = CHARDEV_GET_CLASS(s); |
33577b47 PD |
115 | int res = 0; |
116 | *offset = 0; | |
117 | ||
118 | qemu_mutex_lock(&s->chr_write_lock); | |
119 | while (*offset < len) { | |
53628efb | 120 | retry: |
777357d7 | 121 | res = cc->chr_write(s, buf + *offset, len - *offset); |
c90e9392 | 122 | if (res < 0 && errno == EAGAIN && write_all) { |
2158fa1b LS |
123 | if (qemu_in_coroutine()) { |
124 | qemu_co_sleep_ns(QEMU_CLOCK_REALTIME, 100000); | |
125 | } else { | |
126 | g_usleep(100); | |
127 | } | |
53628efb DB |
128 | goto retry; |
129 | } | |
33577b47 PD |
130 | |
131 | if (res <= 0) { | |
132 | break; | |
133 | } | |
134 | ||
135 | *offset += res; | |
c90e9392 MAL |
136 | if (!write_all) { |
137 | break; | |
138 | } | |
33577b47 PD |
139 | } |
140 | if (*offset > 0) { | |
d96aa5db DB |
141 | /* |
142 | * If some data was written by backend, we should | |
143 | * only log what was actually written. This method | |
144 | * may be invoked again to write the remaining | |
145 | * method, thus we'll log the remainder at that time. | |
146 | */ | |
a9b1ca38 | 147 | qemu_chr_write_log(s, buf, *offset); |
d96aa5db DB |
148 | } else if (res < 0) { |
149 | /* | |
150 | * If a fatal error was reported by the backend, | |
151 | * assume this method won't be invoked again with | |
152 | * this buffer, so log it all right away. | |
153 | */ | |
154 | qemu_chr_write_log(s, buf, len); | |
33577b47 PD |
155 | } |
156 | qemu_mutex_unlock(&s->chr_write_lock); | |
157 | ||
158 | return res; | |
159 | } | |
160 | ||
4d43a603 | 161 | int qemu_chr_write(Chardev *s, const uint8_t *buf, int len, bool write_all) |
cd18720a | 162 | { |
c90e9392 | 163 | int offset = 0; |
33577b47 | 164 | int res; |
cd18720a | 165 | |
5ebd6703 | 166 | if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_PLAY) { |
33577b47 PD |
167 | replay_char_write_event_load(&res, &offset); |
168 | assert(offset <= len); | |
a9b1ca38 | 169 | qemu_chr_write_buffer(s, buf, offset, &offset, true); |
33577b47 PD |
170 | return res; |
171 | } | |
cd18720a | 172 | |
a9b1ca38 | 173 | res = qemu_chr_write_buffer(s, buf, len, &offset, write_all); |
cd18720a | 174 | |
5ebd6703 | 175 | if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_RECORD) { |
33577b47 | 176 | replay_char_write_event_save(res, offset); |
cd18720a AL |
177 | } |
178 | ||
9005b2a7 PB |
179 | if (res < 0) { |
180 | return res; | |
181 | } | |
cd18720a AL |
182 | return offset; |
183 | } | |
184 | ||
0ec7b3e7 | 185 | int qemu_chr_be_can_write(Chardev *s) |
6f97dba0 | 186 | { |
a4afa548 MAL |
187 | CharBackend *be = s->be; |
188 | ||
189 | if (!be || !be->chr_can_read) { | |
6f97dba0 | 190 | return 0; |
a4afa548 MAL |
191 | } |
192 | ||
193 | return be->chr_can_read(be->opaque); | |
6f97dba0 AL |
194 | } |
195 | ||
0ec7b3e7 | 196 | void qemu_chr_be_write_impl(Chardev *s, uint8_t *buf, int len) |
6f97dba0 | 197 | { |
a4afa548 MAL |
198 | CharBackend *be = s->be; |
199 | ||
200 | if (be && be->chr_read) { | |
201 | be->chr_read(be->opaque, buf, len); | |
ac310734 | 202 | } |
6f97dba0 AL |
203 | } |
204 | ||
0ec7b3e7 | 205 | void qemu_chr_be_write(Chardev *s, uint8_t *buf, int len) |
33577b47 | 206 | { |
5ebd6703 | 207 | if (qemu_chr_replay(s)) { |
33577b47 PD |
208 | if (replay_mode == REPLAY_MODE_PLAY) { |
209 | return; | |
210 | } | |
211 | replay_chr_be_write(s, buf, len); | |
212 | } else { | |
213 | qemu_chr_be_write_impl(s, buf, len); | |
214 | } | |
215 | } | |
216 | ||
07241c20 PX |
217 | void qemu_chr_be_update_read_handlers(Chardev *s, |
218 | GMainContext *context) | |
219 | { | |
220 | ChardevClass *cc = CHARDEV_GET_CLASS(s); | |
221 | ||
9ac3788b MAL |
222 | assert(qemu_chr_has_feature(s, QEMU_CHAR_FEATURE_GCONTEXT) |
223 | || !context); | |
95eeeba6 | 224 | s->gcontext = context; |
07241c20 | 225 | if (cc->chr_update_read_handler) { |
bb86d05f | 226 | cc->chr_update_read_handler(s); |
07241c20 PX |
227 | } |
228 | } | |
229 | ||
0ec7b3e7 | 230 | int qemu_chr_add_client(Chardev *s, int fd) |
13661089 | 231 | { |
777357d7 MAL |
232 | return CHARDEV_GET_CLASS(s)->chr_add_client ? |
233 | CHARDEV_GET_CLASS(s)->chr_add_client(s, fd) : -1; | |
13661089 DB |
234 | } |
235 | ||
777357d7 MAL |
236 | static void qemu_char_open(Chardev *chr, ChardevBackend *backend, |
237 | bool *be_opened, Error **errp) | |
6f97dba0 | 238 | { |
777357d7 MAL |
239 | ChardevClass *cc = CHARDEV_GET_CLASS(chr); |
240 | /* Any ChardevCommon member would work */ | |
241 | ChardevCommon *common = backend ? backend->u.null.data : NULL; | |
242 | ||
243 | if (common && common->has_logfile) { | |
692277f3 | 244 | int flags = O_WRONLY; |
777357d7 MAL |
245 | if (common->has_logappend && |
246 | common->logappend) { | |
247 | flags |= O_APPEND; | |
248 | } else { | |
249 | flags |= O_TRUNC; | |
250 | } | |
692277f3 | 251 | chr->logfd = qemu_create(common->logfile, flags, 0666, errp); |
777357d7 | 252 | if (chr->logfd < 0) { |
777357d7 MAL |
253 | return; |
254 | } | |
255 | } | |
256 | ||
257 | if (cc->open) { | |
258 | cc->open(chr, backend, be_opened, errp); | |
259 | } | |
6f97dba0 AL |
260 | } |
261 | ||
777357d7 | 262 | static void char_init(Object *obj) |
6f97dba0 | 263 | { |
777357d7 | 264 | Chardev *chr = CHARDEV(obj); |
6f97dba0 | 265 | |
feb774ca | 266 | chr->handover_yank_instance = false; |
777357d7 MAL |
267 | chr->logfd = -1; |
268 | qemu_mutex_init(&chr->chr_write_lock); | |
9ac3788b MAL |
269 | |
270 | /* | |
271 | * Assume if chr_update_read_handler is implemented it will | |
272 | * take the updated gcontext into account. | |
273 | */ | |
274 | if (CHARDEV_GET_CLASS(chr)->chr_update_read_handler) { | |
275 | qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_GCONTEXT); | |
276 | } | |
277 | ||
777357d7 MAL |
278 | } |
279 | ||
eb314a94 MAL |
280 | static int null_chr_write(Chardev *chr, const uint8_t *buf, int len) |
281 | { | |
282 | return len; | |
283 | } | |
284 | ||
285 | static void char_class_init(ObjectClass *oc, void *data) | |
286 | { | |
287 | ChardevClass *cc = CHARDEV_CLASS(oc); | |
288 | ||
289 | cc->chr_write = null_chr_write; | |
d09c4a47 | 290 | cc->chr_be_event = chr_be_event; |
eb314a94 MAL |
291 | } |
292 | ||
777357d7 MAL |
293 | static void char_finalize(Object *obj) |
294 | { | |
295 | Chardev *chr = CHARDEV(obj); | |
296 | ||
297 | if (chr->be) { | |
298 | chr->be->chr = NULL; | |
299 | } | |
300 | g_free(chr->filename); | |
301 | g_free(chr->label); | |
302 | if (chr->logfd != -1) { | |
303 | close(chr->logfd); | |
d0d7708b | 304 | } |
777357d7 MAL |
305 | qemu_mutex_destroy(&chr->chr_write_lock); |
306 | } | |
307 | ||
308 | static const TypeInfo char_type_info = { | |
309 | .name = TYPE_CHARDEV, | |
310 | .parent = TYPE_OBJECT, | |
311 | .instance_size = sizeof(Chardev), | |
312 | .instance_init = char_init, | |
313 | .instance_finalize = char_finalize, | |
314 | .abstract = true, | |
315 | .class_size = sizeof(ChardevClass), | |
eb314a94 | 316 | .class_init = char_class_init, |
777357d7 MAL |
317 | }; |
318 | ||
0ec7b3e7 | 319 | static bool qemu_chr_is_busy(Chardev *s) |
a4afa548 | 320 | { |
777357d7 MAL |
321 | if (CHARDEV_IS_MUX(s)) { |
322 | MuxChardev *d = MUX_CHARDEV(s); | |
a4afa548 MAL |
323 | return d->mux_cnt >= 0; |
324 | } else { | |
325 | return s->be != NULL; | |
326 | } | |
327 | } | |
328 | ||
d24ca4b8 | 329 | int qemu_chr_wait_connected(Chardev *chr, Error **errp) |
6b6723c3 | 330 | { |
777357d7 MAL |
331 | ChardevClass *cc = CHARDEV_GET_CLASS(chr); |
332 | ||
333 | if (cc->chr_wait_connected) { | |
334 | return cc->chr_wait_connected(chr, errp); | |
6b6723c3 MAL |
335 | } |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
95e30b2a MAL |
340 | QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename, |
341 | bool permit_mux_mon) | |
191bc01b | 342 | { |
6ea314d9 | 343 | char host[65], port[33], width[8], height[8]; |
aeb2c47a | 344 | int pos; |
7d31544f | 345 | const char *p; |
191bc01b | 346 | QemuOpts *opts; |
8be7e7e4 | 347 | Error *local_err = NULL; |
191bc01b | 348 | |
8be7e7e4 | 349 | opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err); |
84d18f06 | 350 | if (local_err) { |
33394884 | 351 | error_report_err(local_err); |
191bc01b | 352 | return NULL; |
8be7e7e4 | 353 | } |
191bc01b | 354 | |
7591c5c1 | 355 | if (strstart(filename, "mon:", &p)) { |
95e30b2a MAL |
356 | if (!permit_mux_mon) { |
357 | error_report("mon: isn't supported in this context"); | |
358 | return NULL; | |
359 | } | |
7591c5c1 | 360 | filename = p; |
f43e47db | 361 | qemu_opt_set(opts, "mux", "on", &error_abort); |
02c4bdf1 PB |
362 | if (strcmp(filename, "stdio") == 0) { |
363 | /* Monitor is muxed to stdio: do not exit on Ctrl+C by default | |
364 | * but pass it to the guest. Handle this only for compat syntax, | |
365 | * for -chardev syntax we have special option for this. | |
366 | * This is what -nographic did, redirecting+muxing serial+monitor | |
367 | * to stdio causing Ctrl+C to be passed to guest. */ | |
f43e47db | 368 | qemu_opt_set(opts, "signal", "off", &error_abort); |
02c4bdf1 | 369 | } |
7591c5c1 GH |
370 | } |
371 | ||
f0457e8d GH |
372 | if (strcmp(filename, "null") == 0 || |
373 | strcmp(filename, "pty") == 0 || | |
374 | strcmp(filename, "msmouse") == 0 || | |
378af961 | 375 | strcmp(filename, "wctablet") == 0 || |
dc1c21e6 | 376 | strcmp(filename, "braille") == 0 || |
5692399f | 377 | strcmp(filename, "testdev") == 0 || |
f0457e8d | 378 | strcmp(filename, "stdio") == 0) { |
f43e47db | 379 | qemu_opt_set(opts, "backend", filename, &error_abort); |
191bc01b GH |
380 | return opts; |
381 | } | |
6ea314d9 | 382 | if (strstart(filename, "vc", &p)) { |
f43e47db | 383 | qemu_opt_set(opts, "backend", "vc", &error_abort); |
6ea314d9 | 384 | if (*p == ':') { |
49aa4058 | 385 | if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) { |
6ea314d9 | 386 | /* pixels */ |
f43e47db MA |
387 | qemu_opt_set(opts, "width", width, &error_abort); |
388 | qemu_opt_set(opts, "height", height, &error_abort); | |
49aa4058 | 389 | } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) { |
6ea314d9 | 390 | /* chars */ |
f43e47db MA |
391 | qemu_opt_set(opts, "cols", width, &error_abort); |
392 | qemu_opt_set(opts, "rows", height, &error_abort); | |
6ea314d9 GH |
393 | } else { |
394 | goto fail; | |
395 | } | |
396 | } | |
397 | return opts; | |
398 | } | |
d6c983cd | 399 | if (strcmp(filename, "con:") == 0) { |
f43e47db | 400 | qemu_opt_set(opts, "backend", "console", &error_abort); |
d6c983cd GH |
401 | return opts; |
402 | } | |
48b76496 | 403 | if (strstart(filename, "COM", NULL)) { |
f43e47db MA |
404 | qemu_opt_set(opts, "backend", "serial", &error_abort); |
405 | qemu_opt_set(opts, "path", filename, &error_abort); | |
48b76496 GH |
406 | return opts; |
407 | } | |
7d31544f | 408 | if (strstart(filename, "file:", &p)) { |
f43e47db MA |
409 | qemu_opt_set(opts, "backend", "file", &error_abort); |
410 | qemu_opt_set(opts, "path", p, &error_abort); | |
7d31544f GH |
411 | return opts; |
412 | } | |
413 | if (strstart(filename, "pipe:", &p)) { | |
f43e47db MA |
414 | qemu_opt_set(opts, "backend", "pipe", &error_abort); |
415 | qemu_opt_set(opts, "path", p, &error_abort); | |
7d31544f GH |
416 | return opts; |
417 | } | |
aeb2c47a | 418 | if (strstart(filename, "tcp:", &p) || |
ae92cbd5 | 419 | strstart(filename, "telnet:", &p) || |
981b06e7 JS |
420 | strstart(filename, "tn3270:", &p) || |
421 | strstart(filename, "websocket:", &p)) { | |
aeb2c47a GH |
422 | if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) { |
423 | host[0] = 0; | |
424 | if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) | |
425 | goto fail; | |
426 | } | |
f43e47db MA |
427 | qemu_opt_set(opts, "backend", "socket", &error_abort); |
428 | qemu_opt_set(opts, "host", host, &error_abort); | |
429 | qemu_opt_set(opts, "port", port, &error_abort); | |
aeb2c47a | 430 | if (p[pos] == ',') { |
235e59cf | 431 | if (!qemu_opts_do_parse(opts, p + pos + 1, NULL, &local_err)) { |
dc523cd3 | 432 | error_report_err(local_err); |
aeb2c47a | 433 | goto fail; |
dc523cd3 | 434 | } |
aeb2c47a | 435 | } |
ae92cbd5 | 436 | if (strstart(filename, "telnet:", &p)) { |
f43e47db | 437 | qemu_opt_set(opts, "telnet", "on", &error_abort); |
ae92cbd5 JL |
438 | } else if (strstart(filename, "tn3270:", &p)) { |
439 | qemu_opt_set(opts, "tn3270", "on", &error_abort); | |
981b06e7 JS |
440 | } else if (strstart(filename, "websocket:", &p)) { |
441 | qemu_opt_set(opts, "websocket", "on", &error_abort); | |
ae92cbd5 | 442 | } |
aeb2c47a GH |
443 | return opts; |
444 | } | |
7e1b35b4 | 445 | if (strstart(filename, "udp:", &p)) { |
f43e47db | 446 | qemu_opt_set(opts, "backend", "udp", &error_abort); |
7e1b35b4 GH |
447 | if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) { |
448 | host[0] = 0; | |
39324ca4 | 449 | if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) { |
7e1b35b4 GH |
450 | goto fail; |
451 | } | |
452 | } | |
f43e47db MA |
453 | qemu_opt_set(opts, "host", host, &error_abort); |
454 | qemu_opt_set(opts, "port", port, &error_abort); | |
7e1b35b4 GH |
455 | if (p[pos] == '@') { |
456 | p += pos + 1; | |
457 | if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) { | |
458 | host[0] = 0; | |
459 | if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) { | |
7e1b35b4 GH |
460 | goto fail; |
461 | } | |
462 | } | |
f43e47db MA |
463 | qemu_opt_set(opts, "localaddr", host, &error_abort); |
464 | qemu_opt_set(opts, "localport", port, &error_abort); | |
7e1b35b4 GH |
465 | } |
466 | return opts; | |
467 | } | |
aeb2c47a | 468 | if (strstart(filename, "unix:", &p)) { |
f43e47db | 469 | qemu_opt_set(opts, "backend", "socket", &error_abort); |
235e59cf | 470 | if (!qemu_opts_do_parse(opts, p, "path", &local_err)) { |
dc523cd3 | 471 | error_report_err(local_err); |
aeb2c47a | 472 | goto fail; |
dc523cd3 | 473 | } |
aeb2c47a GH |
474 | return opts; |
475 | } | |
48b76496 GH |
476 | if (strstart(filename, "/dev/parport", NULL) || |
477 | strstart(filename, "/dev/ppi", NULL)) { | |
73119c28 | 478 | qemu_opt_set(opts, "backend", "parallel", &error_abort); |
f43e47db | 479 | qemu_opt_set(opts, "path", filename, &error_abort); |
48b76496 GH |
480 | return opts; |
481 | } | |
482 | if (strstart(filename, "/dev/", NULL)) { | |
73119c28 | 483 | qemu_opt_set(opts, "backend", "serial", &error_abort); |
f43e47db | 484 | qemu_opt_set(opts, "path", filename, &error_abort); |
48b76496 GH |
485 | return opts; |
486 | } | |
191bc01b | 487 | |
0bf62dc8 DB |
488 | error_report("'%s' is not a valid char driver", filename); |
489 | ||
aeb2c47a | 490 | fail: |
191bc01b GH |
491 | qemu_opts_del(opts); |
492 | return NULL; | |
493 | } | |
494 | ||
21a933ea | 495 | void qemu_chr_parse_common(QemuOpts *opts, ChardevCommon *backend) |
d0d7708b DB |
496 | { |
497 | const char *logfile = qemu_opt_get(opts, "logfile"); | |
498 | ||
499 | backend->has_logfile = logfile != NULL; | |
e1f98fe4 | 500 | backend->logfile = g_strdup(logfile); |
d0d7708b DB |
501 | |
502 | backend->has_logappend = true; | |
503 | backend->logappend = qemu_opt_get_bool(opts, "logappend", false); | |
504 | } | |
505 | ||
88cace9f MAL |
506 | static const ChardevClass *char_get_class(const char *driver, Error **errp) |
507 | { | |
508 | ObjectClass *oc; | |
509 | const ChardevClass *cc; | |
510 | char *typename = g_strdup_printf("chardev-%s", driver); | |
511 | ||
ef138c77 | 512 | oc = module_object_class_by_name(typename); |
88cace9f MAL |
513 | g_free(typename); |
514 | ||
515 | if (!object_class_dynamic_cast(oc, TYPE_CHARDEV)) { | |
516 | error_setg(errp, "'%s' is not a valid char driver name", driver); | |
517 | return NULL; | |
518 | } | |
d654f34e | 519 | |
88cace9f MAL |
520 | if (object_class_is_abstract(oc)) { |
521 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver", | |
6cc0667d | 522 | "an abstract device type"); |
88cace9f MAL |
523 | return NULL; |
524 | } | |
525 | ||
526 | cc = CHARDEV_CLASS(oc); | |
527 | if (cc->internal) { | |
528 | error_setg(errp, "'%s' is not a valid char driver name", driver); | |
529 | return NULL; | |
530 | } | |
531 | ||
532 | return cc; | |
533 | } | |
534 | ||
59652436 | 535 | static struct ChardevAlias { |
88cace9f MAL |
536 | const char *typename; |
537 | const char *alias; | |
59652436 | 538 | bool deprecation_warning_printed; |
88cace9f MAL |
539 | } chardev_alias_table[] = { |
540 | #ifdef HAVE_CHARDEV_PARPORT | |
541 | { "parallel", "parport" }, | |
542 | #endif | |
543 | #ifdef HAVE_CHARDEV_SERIAL | |
544 | { "serial", "tty" }, | |
545 | #endif | |
546 | }; | |
547 | ||
548 | typedef struct ChadevClassFE { | |
f3b70e07 | 549 | void (*fn)(const char *name, void *opaque); |
88cace9f MAL |
550 | void *opaque; |
551 | } ChadevClassFE; | |
552 | ||
553 | static void | |
554 | chardev_class_foreach(ObjectClass *klass, void *opaque) | |
2c5f4882 | 555 | { |
88cace9f MAL |
556 | ChadevClassFE *fe = opaque; |
557 | ||
558 | assert(g_str_has_prefix(object_class_get_name(klass), "chardev-")); | |
559 | if (CHARDEV_CLASS(klass)->internal) { | |
560 | return; | |
561 | } | |
562 | ||
f3b70e07 | 563 | fe->fn(object_class_get_name(klass) + 8, fe->opaque); |
88cace9f MAL |
564 | } |
565 | ||
566 | static void | |
f3b70e07 | 567 | chardev_name_foreach(void (*fn)(const char *name, void *opaque), |
1254bd39 | 568 | void *opaque) |
88cace9f MAL |
569 | { |
570 | ChadevClassFE fe = { .fn = fn, .opaque = opaque }; | |
88cace9f MAL |
571 | |
572 | object_class_foreach(chardev_class_foreach, TYPE_CHARDEV, false, &fe); | |
88cace9f MAL |
573 | } |
574 | ||
575 | static void | |
f3b70e07 | 576 | help_string_append(const char *name, void *opaque) |
88cace9f MAL |
577 | { |
578 | GString *str = opaque; | |
579 | ||
8513ec28 | 580 | g_string_append_printf(str, "\n %s", name); |
2c5f4882 GH |
581 | } |
582 | ||
313e45b5 AN |
583 | static const char *chardev_alias_translate(const char *name) |
584 | { | |
585 | int i; | |
586 | for (i = 0; i < (int)ARRAY_SIZE(chardev_alias_table); i++) { | |
587 | if (g_strcmp0(chardev_alias_table[i].alias, name) == 0) { | |
59652436 KW |
588 | if (!chardev_alias_table[i].deprecation_warning_printed) { |
589 | warn_report("The alias '%s' is deprecated, use '%s' instead", | |
590 | name, chardev_alias_table[i].typename); | |
591 | chardev_alias_table[i].deprecation_warning_printed = true; | |
592 | } | |
313e45b5 AN |
593 | return chardev_alias_table[i].typename; |
594 | } | |
595 | } | |
596 | return name; | |
597 | } | |
598 | ||
75b60160 | 599 | ChardevBackend *qemu_chr_parse_opts(QemuOpts *opts, Error **errp) |
191bc01b | 600 | { |
0aff637e | 601 | Error *local_err = NULL; |
88cace9f | 602 | const ChardevClass *cc; |
0b663b7d | 603 | ChardevBackend *backend = NULL; |
313e45b5 | 604 | const char *name = chardev_alias_translate(qemu_opt_get(opts, "backend")); |
191bc01b | 605 | |
0b812f31 | 606 | if (name == NULL) { |
312fd5f2 | 607 | error_setg(errp, "chardev: \"%s\" missing backend", |
bd2d80b2 | 608 | qemu_opts_id(opts)); |
0b663b7d | 609 | return NULL; |
1bbd185f | 610 | } |
517b3d40 | 611 | |
313e45b5 AN |
612 | cc = char_get_class(name, errp); |
613 | if (cc == NULL) { | |
614 | return NULL; | |
615 | } | |
616 | ||
617 | backend = g_new0(ChardevBackend, 1); | |
618 | backend->type = CHARDEV_BACKEND_KIND_NULL; | |
619 | ||
620 | if (cc->parse) { | |
621 | cc->parse(opts, backend, &local_err); | |
622 | if (local_err) { | |
623 | error_propagate(errp, local_err); | |
624 | qapi_free_ChardevBackend(backend); | |
625 | return NULL; | |
626 | } | |
627 | } else { | |
628 | ChardevCommon *ccom = g_new0(ChardevCommon, 1); | |
629 | qemu_chr_parse_common(opts, ccom); | |
630 | backend->u.null.data = ccom; /* Any ChardevCommon member would work */ | |
631 | } | |
632 | ||
633 | return backend; | |
634 | } | |
635 | ||
4ad6f6cb PB |
636 | Chardev *qemu_chr_new_from_opts(QemuOpts *opts, GMainContext *context, |
637 | Error **errp) | |
313e45b5 AN |
638 | { |
639 | const ChardevClass *cc; | |
640 | Chardev *chr = NULL; | |
641 | ChardevBackend *backend = NULL; | |
642 | const char *name = chardev_alias_translate(qemu_opt_get(opts, "backend")); | |
643 | const char *id = qemu_opts_id(opts); | |
644 | char *bid = NULL; | |
645 | ||
646 | if (name && is_help_option(name)) { | |
776a32a0 | 647 | GString *str = g_string_new(""); |
88cace9f MAL |
648 | |
649 | chardev_name_foreach(help_string_append, str); | |
776a32a0 | 650 | |
ef2fd6f1 | 651 | qemu_printf("Available chardev backend types: %s\n", str->str); |
776a32a0 | 652 | g_string_free(str, true); |
0ec846bf | 653 | return NULL; |
517b3d40 LM |
654 | } |
655 | ||
656 | if (id == NULL) { | |
657 | error_setg(errp, "chardev: no id specified"); | |
0b663b7d | 658 | return NULL; |
517b3d40 LM |
659 | } |
660 | ||
313e45b5 AN |
661 | backend = qemu_chr_parse_opts(opts, errp); |
662 | if (backend == NULL) { | |
663 | return NULL; | |
191bc01b | 664 | } |
88cace9f MAL |
665 | |
666 | cc = char_get_class(name, errp); | |
667 | if (cc == NULL) { | |
313e45b5 | 668 | goto out; |
191bc01b GH |
669 | } |
670 | ||
a61ae7f8 PM |
671 | if (qemu_opt_get_bool(opts, "mux", 0)) { |
672 | bid = g_strdup_printf("%s-base", id); | |
673 | } | |
2c5f4882 | 674 | |
c5749f7c | 675 | chr = qemu_chardev_new(bid ? bid : id, |
0b663b7d | 676 | object_class_get_name(OBJECT_CLASS(cc)), |
4ad6f6cb | 677 | backend, context, errp); |
c5749f7c | 678 | |
0b663b7d MAL |
679 | if (chr == NULL) { |
680 | goto out; | |
191bc01b GH |
681 | } |
682 | ||
a61ae7f8 | 683 | if (bid) { |
0b663b7d | 684 | Chardev *mux; |
a61ae7f8 | 685 | qapi_free_ChardevBackend(backend); |
a61ae7f8 | 686 | backend = g_new0(ChardevBackend, 1); |
130257dc | 687 | backend->type = CHARDEV_BACKEND_KIND_MUX; |
0b663b7d | 688 | backend->u.mux.data = g_new0(ChardevMux, 1); |
32bafa8f | 689 | backend->u.mux.data->chardev = g_strdup(bid); |
4ad6f6cb | 690 | mux = qemu_chardev_new(id, TYPE_CHARDEV_MUX, backend, context, errp); |
0b663b7d | 691 | if (mux == NULL) { |
2f5d45a1 | 692 | object_unparent(OBJECT(chr)); |
a61ae7f8 | 693 | chr = NULL; |
0b663b7d | 694 | goto out; |
a61ae7f8 | 695 | } |
0b663b7d | 696 | chr = mux; |
bd5c51ee | 697 | } |
7591c5c1 | 698 | |
0b663b7d | 699 | out: |
a61ae7f8 | 700 | qapi_free_ChardevBackend(backend); |
a61ae7f8 | 701 | g_free(bid); |
191bc01b GH |
702 | return chr; |
703 | } | |
704 | ||
95e30b2a | 705 | Chardev *qemu_chr_new_noreplay(const char *label, const char *filename, |
4ad6f6cb | 706 | bool permit_mux_mon, GMainContext *context) |
6f97dba0 AL |
707 | { |
708 | const char *p; | |
0ec7b3e7 | 709 | Chardev *chr; |
191bc01b | 710 | QemuOpts *opts; |
bd2d80b2 | 711 | Error *err = NULL; |
191bc01b | 712 | |
c845f401 GH |
713 | if (strstart(filename, "chardev:", &p)) { |
714 | return qemu_chr_find(p); | |
715 | } | |
716 | ||
95e30b2a | 717 | opts = qemu_chr_parse_compat(label, filename, permit_mux_mon); |
7e1b35b4 GH |
718 | if (!opts) |
719 | return NULL; | |
6f97dba0 | 720 | |
4ad6f6cb | 721 | chr = qemu_chr_new_from_opts(opts, context, &err); |
95e30b2a | 722 | if (!chr) { |
565f65d2 | 723 | error_report_err(err); |
95e30b2a | 724 | goto out; |
bd2d80b2 | 725 | } |
95e30b2a MAL |
726 | |
727 | if (qemu_opt_get_bool(opts, "mux", 0)) { | |
728 | assert(permit_mux_mon); | |
8e9119a8 KW |
729 | monitor_init_hmp(chr, true, &err); |
730 | if (err) { | |
731 | error_report_err(err); | |
732 | object_unparent(OBJECT(chr)); | |
733 | chr = NULL; | |
734 | goto out; | |
735 | } | |
6f97dba0 | 736 | } |
95e30b2a MAL |
737 | |
738 | out: | |
0a73336d | 739 | qemu_opts_del(opts); |
6f97dba0 AL |
740 | return chr; |
741 | } | |
742 | ||
95e30b2a MAL |
743 | static Chardev *qemu_chr_new_permit_mux_mon(const char *label, |
744 | const char *filename, | |
4ad6f6cb PB |
745 | bool permit_mux_mon, |
746 | GMainContext *context) | |
33577b47 | 747 | { |
0ec7b3e7 | 748 | Chardev *chr; |
4ad6f6cb | 749 | chr = qemu_chr_new_noreplay(label, filename, permit_mux_mon, context); |
33577b47 | 750 | if (chr) { |
5ebd6703 MAL |
751 | if (replay_mode != REPLAY_MODE_NONE) { |
752 | qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_REPLAY); | |
753 | } | |
777357d7 | 754 | if (qemu_chr_replay(chr) && CHARDEV_GET_CLASS(chr)->chr_ioctl) { |
776a32a0 MAL |
755 | error_report("Replay: ioctl is not supported " |
756 | "for serial devices yet"); | |
33577b47 PD |
757 | } |
758 | replay_register_char_driver(chr); | |
759 | } | |
760 | return chr; | |
761 | } | |
762 | ||
4ad6f6cb PB |
763 | Chardev *qemu_chr_new(const char *label, const char *filename, |
764 | GMainContext *context) | |
95e30b2a | 765 | { |
4ad6f6cb | 766 | return qemu_chr_new_permit_mux_mon(label, filename, false, context); |
95e30b2a MAL |
767 | } |
768 | ||
4ad6f6cb PB |
769 | Chardev *qemu_chr_new_mux_mon(const char *label, const char *filename, |
770 | GMainContext *context) | |
95e30b2a | 771 | { |
4ad6f6cb | 772 | return qemu_chr_new_permit_mux_mon(label, filename, true, context); |
95e30b2a MAL |
773 | } |
774 | ||
6061162e | 775 | static int qmp_query_chardev_foreach(Object *obj, void *data) |
1ad78ea5 | 776 | { |
6061162e MAL |
777 | Chardev *chr = CHARDEV(obj); |
778 | ChardevInfoList **list = data; | |
54aa3de7 | 779 | ChardevInfo *value = g_malloc0(sizeof(*value)); |
6061162e | 780 | |
54aa3de7 EB |
781 | value->label = g_strdup(chr->label); |
782 | value->filename = g_strdup(chr->filename); | |
783 | value->frontend_open = chr->be && chr->be->fe_open; | |
6061162e | 784 | |
54aa3de7 | 785 | QAPI_LIST_PREPEND(*list, value); |
6061162e MAL |
786 | |
787 | return 0; | |
1ad78ea5 MAL |
788 | } |
789 | ||
c5a415a0 | 790 | ChardevInfoList *qmp_query_chardev(Error **errp) |
6f97dba0 | 791 | { |
c5a415a0 | 792 | ChardevInfoList *chr_list = NULL; |
6f97dba0 | 793 | |
6061162e MAL |
794 | object_child_foreach(get_chardevs_root(), |
795 | qmp_query_chardev_foreach, &chr_list); | |
588b3832 | 796 | |
c5a415a0 | 797 | return chr_list; |
6f97dba0 | 798 | } |
c845f401 | 799 | |
88cace9f | 800 | static void |
f3b70e07 | 801 | qmp_prepend_backend(const char *name, void *opaque) |
0b812f31 | 802 | { |
88cace9f | 803 | ChardevBackendInfoList **list = opaque; |
1254bd39 | 804 | ChardevBackendInfo *value; |
88cace9f | 805 | |
1254bd39 | 806 | value = g_new0(ChardevBackendInfo, 1); |
54aa3de7 EB |
807 | value->name = g_strdup(name); |
808 | QAPI_LIST_PREPEND(*list, value); | |
0b812f31 MAL |
809 | } |
810 | ||
77d1c3c6 MK |
811 | ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp) |
812 | { | |
813 | ChardevBackendInfoList *backend_list = NULL; | |
a1698bf1 | 814 | |
88cace9f | 815 | chardev_name_foreach(qmp_prepend_backend, &backend_list); |
77d1c3c6 MK |
816 | |
817 | return backend_list; | |
818 | } | |
819 | ||
0ec7b3e7 | 820 | Chardev *qemu_chr_find(const char *name) |
c845f401 | 821 | { |
6061162e | 822 | Object *obj = object_resolve_path_component(get_chardevs_root(), name); |
c845f401 | 823 | |
6061162e | 824 | return obj ? CHARDEV(obj) : NULL; |
c845f401 | 825 | } |
0beb4942 | 826 | |
4d454574 PB |
827 | QemuOptsList qemu_chardev_opts = { |
828 | .name = "chardev", | |
829 | .implied_opt_name = "backend", | |
830 | .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head), | |
831 | .desc = { | |
832 | { | |
833 | .name = "backend", | |
834 | .type = QEMU_OPT_STRING, | |
835 | },{ | |
836 | .name = "path", | |
837 | .type = QEMU_OPT_STRING, | |
838 | },{ | |
839 | .name = "host", | |
840 | .type = QEMU_OPT_STRING, | |
841 | },{ | |
842 | .name = "port", | |
843 | .type = QEMU_OPT_STRING, | |
0935700f DB |
844 | },{ |
845 | .name = "fd", | |
846 | .type = QEMU_OPT_STRING, | |
4d454574 PB |
847 | },{ |
848 | .name = "localaddr", | |
849 | .type = QEMU_OPT_STRING, | |
850 | },{ | |
851 | .name = "localport", | |
852 | .type = QEMU_OPT_STRING, | |
853 | },{ | |
854 | .name = "to", | |
855 | .type = QEMU_OPT_NUMBER, | |
856 | },{ | |
857 | .name = "ipv4", | |
858 | .type = QEMU_OPT_BOOL, | |
859 | },{ | |
860 | .name = "ipv6", | |
861 | .type = QEMU_OPT_BOOL, | |
862 | },{ | |
863 | .name = "wait", | |
864 | .type = QEMU_OPT_BOOL, | |
865 | },{ | |
866 | .name = "server", | |
867 | .type = QEMU_OPT_BOOL, | |
868 | },{ | |
869 | .name = "delay", | |
870 | .type = QEMU_OPT_BOOL, | |
a9b1315f PB |
871 | },{ |
872 | .name = "nodelay", | |
873 | .type = QEMU_OPT_BOOL, | |
5dd1f02b CM |
874 | },{ |
875 | .name = "reconnect", | |
876 | .type = QEMU_OPT_NUMBER, | |
4d454574 PB |
877 | },{ |
878 | .name = "telnet", | |
879 | .type = QEMU_OPT_BOOL, | |
ae92cbd5 JL |
880 | },{ |
881 | .name = "tn3270", | |
882 | .type = QEMU_OPT_BOOL, | |
a8fb5427 DB |
883 | },{ |
884 | .name = "tls-creds", | |
885 | .type = QEMU_OPT_STRING, | |
fd4a5fd4 DB |
886 | },{ |
887 | .name = "tls-authz", | |
888 | .type = QEMU_OPT_STRING, | |
981b06e7 JS |
889 | },{ |
890 | .name = "websocket", | |
891 | .type = QEMU_OPT_BOOL, | |
4d454574 PB |
892 | },{ |
893 | .name = "width", | |
894 | .type = QEMU_OPT_NUMBER, | |
895 | },{ | |
896 | .name = "height", | |
897 | .type = QEMU_OPT_NUMBER, | |
898 | },{ | |
899 | .name = "cols", | |
900 | .type = QEMU_OPT_NUMBER, | |
901 | },{ | |
902 | .name = "rows", | |
903 | .type = QEMU_OPT_NUMBER, | |
904 | },{ | |
905 | .name = "mux", | |
906 | .type = QEMU_OPT_BOOL, | |
907 | },{ | |
908 | .name = "signal", | |
909 | .type = QEMU_OPT_BOOL, | |
910 | },{ | |
911 | .name = "name", | |
912 | .type = QEMU_OPT_STRING, | |
913 | },{ | |
914 | .name = "debug", | |
915 | .type = QEMU_OPT_NUMBER, | |
51767e7c | 916 | },{ |
3949e594 | 917 | .name = "size", |
de1cc36e | 918 | .type = QEMU_OPT_SIZE, |
bb6fb7c0 GH |
919 | },{ |
920 | .name = "chardev", | |
921 | .type = QEMU_OPT_STRING, | |
31e38a22 OK |
922 | },{ |
923 | .name = "append", | |
924 | .type = QEMU_OPT_BOOL, | |
d0d7708b DB |
925 | },{ |
926 | .name = "logfile", | |
927 | .type = QEMU_OPT_STRING, | |
928 | },{ | |
929 | .name = "logappend", | |
930 | .type = QEMU_OPT_BOOL, | |
56081919 GH |
931 | },{ |
932 | .name = "mouse", | |
933 | .type = QEMU_OPT_BOOL, | |
f0349f4d GH |
934 | },{ |
935 | .name = "clipboard", | |
936 | .type = QEMU_OPT_BOOL, | |
8acefc79 | 937 | #ifdef CONFIG_LINUX |
776b97d3 XZ |
938 | },{ |
939 | .name = "tight", | |
940 | .type = QEMU_OPT_BOOL, | |
941 | .def_value_str = "on", | |
942 | },{ | |
943 | .name = "abstract", | |
944 | .type = QEMU_OPT_BOOL, | |
8acefc79 | 945 | #endif |
4d454574 PB |
946 | }, |
947 | { /* end of list */ } | |
948 | }, | |
949 | }; | |
f1a1a356 | 950 | |
0ec7b3e7 | 951 | bool qemu_chr_has_feature(Chardev *chr, |
279b066e | 952 | ChardevFeature feature) |
0a73336d DB |
953 | { |
954 | return test_bit(feature, chr->features); | |
955 | } | |
956 | ||
0ec7b3e7 | 957 | void qemu_chr_set_feature(Chardev *chr, |
279b066e | 958 | ChardevFeature feature) |
0a73336d DB |
959 | { |
960 | return set_bit(feature, chr->features); | |
961 | } | |
962 | ||
1e419ee6 MAL |
963 | static Chardev *chardev_new(const char *id, const char *typename, |
964 | ChardevBackend *backend, | |
965 | GMainContext *gcontext, | |
feb774ca | 966 | bool handover_yank_instance, |
1e419ee6 | 967 | Error **errp) |
f1a1a356 | 968 | { |
2f5d45a1 | 969 | Object *obj; |
0ec7b3e7 | 970 | Chardev *chr = NULL; |
eaeba653 | 971 | Error *local_err = NULL; |
82878dac | 972 | bool be_opened = true; |
f1a1a356 | 973 | |
777357d7 | 974 | assert(g_str_has_prefix(typename, "chardev-")); |
f36b0efd | 975 | assert(id); |
f1a1a356 | 976 | |
2f5d45a1 MAL |
977 | obj = object_new(typename); |
978 | chr = CHARDEV(obj); | |
feb774ca | 979 | chr->handover_yank_instance = handover_yank_instance; |
777357d7 | 980 | chr->label = g_strdup(id); |
4ad6f6cb | 981 | chr->gcontext = gcontext; |
4ca17281 | 982 | |
777357d7 | 983 | qemu_char_open(chr, backend, &be_opened, &local_err); |
a1698bf1 | 984 | if (local_err) { |
789fd693 LS |
985 | error_propagate(errp, local_err); |
986 | object_unref(obj); | |
987 | return NULL; | |
eaeba653 PB |
988 | } |
989 | ||
eaeba653 | 990 | if (!chr->filename) { |
777357d7 | 991 | chr->filename = g_strdup(typename + 8); |
f1a1a356 | 992 | } |
82878dac | 993 | if (be_opened) { |
eaeba653 PB |
994 | qemu_chr_be_event(chr, CHR_EVENT_OPENED); |
995 | } | |
777357d7 MAL |
996 | |
997 | return chr; | |
998 | } | |
999 | ||
1e419ee6 MAL |
1000 | Chardev *qemu_chardev_new(const char *id, const char *typename, |
1001 | ChardevBackend *backend, | |
1002 | GMainContext *gcontext, | |
1003 | Error **errp) | |
1004 | { | |
789fd693 | 1005 | Chardev *chr; |
1e419ee6 MAL |
1006 | g_autofree char *genid = NULL; |
1007 | ||
1008 | if (!id) { | |
1009 | genid = id_generate(ID_CHR); | |
1010 | id = genid; | |
1011 | } | |
1012 | ||
feb774ca | 1013 | chr = chardev_new(id, typename, backend, gcontext, false, errp); |
789fd693 LS |
1014 | if (!chr) { |
1015 | return NULL; | |
1016 | } | |
1017 | ||
1018 | if (!object_property_try_add_child(get_chardevs_root(), id, OBJECT(chr), | |
1019 | errp)) { | |
1020 | object_unref(OBJECT(chr)); | |
1021 | return NULL; | |
1022 | } | |
1023 | object_unref(OBJECT(chr)); | |
1024 | ||
1025 | return chr; | |
1e419ee6 MAL |
1026 | } |
1027 | ||
777357d7 MAL |
1028 | ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend, |
1029 | Error **errp) | |
1030 | { | |
64195b0d | 1031 | ERRP_GUARD(); |
777357d7 MAL |
1032 | const ChardevClass *cc; |
1033 | ChardevReturn *ret; | |
64195b0d | 1034 | g_autoptr(Chardev) chr = NULL; |
777357d7 | 1035 | |
a68403b0 MAL |
1036 | if (qemu_chr_find(id)) { |
1037 | error_setg(errp, "Chardev with id '%s' already exists", id); | |
1038 | return NULL; | |
1039 | } | |
1040 | ||
977c736f | 1041 | cc = char_get_class(ChardevBackendKind_str(backend->type), errp); |
777357d7 | 1042 | if (!cc) { |
64195b0d | 1043 | goto err; |
777357d7 MAL |
1044 | } |
1045 | ||
1e419ee6 | 1046 | chr = chardev_new(id, object_class_get_name(OBJECT_CLASS(cc)), |
feb774ca | 1047 | backend, NULL, false, errp); |
777357d7 | 1048 | if (!chr) { |
64195b0d | 1049 | goto err; |
777357d7 MAL |
1050 | } |
1051 | ||
789fd693 LS |
1052 | if (!object_property_try_add_child(get_chardevs_root(), id, OBJECT(chr), |
1053 | errp)) { | |
64195b0d | 1054 | goto err; |
789fd693 | 1055 | } |
789fd693 | 1056 | |
777357d7 MAL |
1057 | ret = g_new0(ChardevReturn, 1); |
1058 | if (CHARDEV_IS_PTY(chr)) { | |
1059 | ret->pty = g_strdup(chr->filename + 4); | |
1060 | ret->has_pty = true; | |
1061 | } | |
1062 | ||
eaeba653 | 1063 | return ret; |
64195b0d MAL |
1064 | |
1065 | err: | |
1066 | error_prepend(errp, "Failed to add chardev '%s': ", id); | |
1067 | return NULL; | |
f1a1a356 GH |
1068 | } |
1069 | ||
7bb86085 AN |
1070 | ChardevReturn *qmp_chardev_change(const char *id, ChardevBackend *backend, |
1071 | Error **errp) | |
1072 | { | |
1073 | CharBackend *be; | |
feb774ca | 1074 | const ChardevClass *cc, *cc_new; |
7bb86085 AN |
1075 | Chardev *chr, *chr_new; |
1076 | bool closed_sent = false; | |
feb774ca | 1077 | bool handover_yank_instance; |
7bb86085 AN |
1078 | ChardevReturn *ret; |
1079 | ||
1080 | chr = qemu_chr_find(id); | |
1081 | if (!chr) { | |
1082 | error_setg(errp, "Chardev '%s' does not exist", id); | |
1083 | return NULL; | |
1084 | } | |
1085 | ||
1086 | if (CHARDEV_IS_MUX(chr)) { | |
1087 | error_setg(errp, "Mux device hotswap not supported yet"); | |
1088 | return NULL; | |
1089 | } | |
1090 | ||
1091 | if (qemu_chr_replay(chr)) { | |
1092 | error_setg(errp, | |
1093 | "Chardev '%s' cannot be changed in record/replay mode", id); | |
1094 | return NULL; | |
1095 | } | |
1096 | ||
1097 | be = chr->be; | |
1098 | if (!be) { | |
1099 | /* easy case */ | |
1100 | object_unparent(OBJECT(chr)); | |
1101 | return qmp_chardev_add(id, backend, errp); | |
1102 | } | |
1103 | ||
1104 | if (!be->chr_be_change) { | |
1105 | error_setg(errp, "Chardev user does not support chardev hotswap"); | |
1106 | return NULL; | |
1107 | } | |
1108 | ||
feb774ca LS |
1109 | cc = CHARDEV_GET_CLASS(chr); |
1110 | cc_new = char_get_class(ChardevBackendKind_str(backend->type), errp); | |
1111 | if (!cc_new) { | |
7bb86085 AN |
1112 | return NULL; |
1113 | } | |
1114 | ||
feb774ca LS |
1115 | /* |
1116 | * The new chardev should not register a yank instance if the current | |
1117 | * chardev has registered one already. | |
1118 | */ | |
1119 | handover_yank_instance = cc->supports_yank && cc_new->supports_yank; | |
1120 | ||
1121 | chr_new = chardev_new(id, object_class_get_name(OBJECT_CLASS(cc_new)), | |
1122 | backend, chr->gcontext, handover_yank_instance, errp); | |
7bb86085 AN |
1123 | if (!chr_new) { |
1124 | return NULL; | |
1125 | } | |
7bb86085 AN |
1126 | |
1127 | if (chr->be_open && !chr_new->be_open) { | |
1128 | qemu_chr_be_event(chr, CHR_EVENT_CLOSED); | |
1129 | closed_sent = true; | |
1130 | } | |
1131 | ||
1132 | chr->be = NULL; | |
1133 | qemu_chr_fe_init(be, chr_new, &error_abort); | |
1134 | ||
1135 | if (be->chr_be_change(be->opaque) < 0) { | |
1136 | error_setg(errp, "Chardev '%s' change failed", chr_new->label); | |
1137 | chr_new->be = NULL; | |
1138 | qemu_chr_fe_init(be, chr, &error_abort); | |
1139 | if (closed_sent) { | |
1140 | qemu_chr_be_event(chr, CHR_EVENT_OPENED); | |
1141 | } | |
1142 | object_unref(OBJECT(chr_new)); | |
1143 | return NULL; | |
1144 | } | |
1145 | ||
feb774ca LS |
1146 | /* change successfull, clean up */ |
1147 | chr_new->handover_yank_instance = false; | |
1148 | ||
1149 | /* | |
1150 | * When the old chardev is freed, it should not unregister the yank | |
1151 | * instance if the new chardev needs it. | |
1152 | */ | |
1153 | chr->handover_yank_instance = handover_yank_instance; | |
1154 | ||
7bb86085 AN |
1155 | object_unparent(OBJECT(chr)); |
1156 | object_property_add_child(get_chardevs_root(), chr_new->label, | |
d2623129 | 1157 | OBJECT(chr_new)); |
7bb86085 AN |
1158 | object_unref(OBJECT(chr_new)); |
1159 | ||
1160 | ret = g_new0(ChardevReturn, 1); | |
1161 | if (CHARDEV_IS_PTY(chr_new)) { | |
1162 | ret->pty = g_strdup(chr_new->filename + 4); | |
1163 | ret->has_pty = true; | |
1164 | } | |
1165 | ||
1166 | return ret; | |
1167 | } | |
1168 | ||
f1a1a356 GH |
1169 | void qmp_chardev_remove(const char *id, Error **errp) |
1170 | { | |
0ec7b3e7 | 1171 | Chardev *chr; |
f1a1a356 GH |
1172 | |
1173 | chr = qemu_chr_find(id); | |
8108fd3e | 1174 | if (chr == NULL) { |
f1a1a356 GH |
1175 | error_setg(errp, "Chardev '%s' not found", id); |
1176 | return; | |
1177 | } | |
a4afa548 | 1178 | if (qemu_chr_is_busy(chr)) { |
f1a1a356 GH |
1179 | error_setg(errp, "Chardev '%s' is busy", id); |
1180 | return; | |
1181 | } | |
5ebd6703 | 1182 | if (qemu_chr_replay(chr)) { |
33577b47 PD |
1183 | error_setg(errp, |
1184 | "Chardev '%s' cannot be unplugged in record/replay mode", id); | |
1185 | return; | |
1186 | } | |
2f5d45a1 | 1187 | object_unparent(OBJECT(chr)); |
f1a1a356 | 1188 | } |
d654f34e | 1189 | |
bd1d5ad9 SF |
1190 | void qmp_chardev_send_break(const char *id, Error **errp) |
1191 | { | |
1192 | Chardev *chr; | |
1193 | ||
1194 | chr = qemu_chr_find(id); | |
1195 | if (chr == NULL) { | |
1196 | error_setg(errp, "Chardev '%s' not found", id); | |
1197 | return; | |
1198 | } | |
1199 | qemu_chr_be_event(chr, CHR_EVENT_BREAK); | |
1200 | } | |
1201 | ||
2c716ba1 PX |
1202 | /* |
1203 | * Add a timeout callback for the chardev (in milliseconds), return | |
1204 | * the GSource object created. Please use this to add timeout hook for | |
1205 | * chardev instead of g_timeout_add() and g_timeout_add_seconds(), to | |
1206 | * make sure the gcontext that the task bound to is correct. | |
1207 | */ | |
1208 | GSource *qemu_chr_timeout_add_ms(Chardev *chr, guint ms, | |
1209 | GSourceFunc func, void *private) | |
1210 | { | |
1211 | GSource *source = g_timeout_source_new(ms); | |
1212 | ||
1213 | assert(func); | |
1214 | g_source_set_callback(source, func, private, NULL); | |
1215 | g_source_attach(source, chr->gcontext); | |
1216 | ||
1217 | return source; | |
1218 | } | |
1219 | ||
aa5cb7f5 | 1220 | void qemu_chr_cleanup(void) |
c1111a24 | 1221 | { |
2f5d45a1 | 1222 | object_unparent(get_chardevs_root()); |
c1111a24 MAL |
1223 | } |
1224 | ||
d654f34e AL |
1225 | static void register_types(void) |
1226 | { | |
88cace9f | 1227 | type_register_static(&char_type_info); |
d654f34e AL |
1228 | } |
1229 | ||
1230 | type_init(register_types); |