4
* Copyright (c) 2003-2008 Fabrice Bellard
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* 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
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
13
* The above copyright notice and this permission notice shall be included in
14
* all copies or substantial portions of the Software.
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* 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
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* 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
24
#include "qemu/osdep.h"
25
#include "qemu-common.h"
26
#include "qemu/cutils.h"
27
#include "monitor/monitor.h"
28
#include "sysemu/sysemu.h"
29
#include "qemu/config-file.h"
30
#include "qemu/error-report.h"
31
#include "sysemu/char.h"
32
#include "qmp-commands.h"
33
#include "qapi-visit.h"
34
#include "sysemu/replay.h"
35
#include "qemu/help_option.h"
39
#include "char-parallel.h"
40
#include "char-serial.h"
42
/***********************************************************/
43
/* character device */
45
static QTAILQ_HEAD(ChardevHead, Chardev) chardevs =
46
QTAILQ_HEAD_INITIALIZER(chardevs);
48
void qemu_chr_be_event(Chardev *s, int event)
50
CharBackend *be = s->be;
52
/* Keep track if the char device is open */
54
case CHR_EVENT_OPENED:
57
case CHR_EVENT_CLOSED:
62
if (!be || !be->chr_event) {
66
be->chr_event(be->opaque, event);
69
void qemu_chr_be_generic_open(Chardev *s)
71
qemu_chr_be_event(s, CHR_EVENT_OPENED);
75
/* Not reporting errors from writing to logfile, as logs are
76
* defined to be "best effort" only */
77
static void qemu_chr_fe_write_log(Chardev *s,
78
const uint8_t *buf, size_t len)
89
ret = write(s->logfd, buf + done, len - done);
90
if (ret == -1 && errno == EAGAIN) {
102
static int qemu_chr_fe_write_buffer(Chardev *s,
103
const uint8_t *buf, int len, int *offset)
105
ChardevClass *cc = CHARDEV_GET_CLASS(s);
109
qemu_mutex_lock(&s->chr_write_lock);
110
while (*offset < len) {
112
res = cc->chr_write(s, buf + *offset, len - *offset);
113
if (res < 0 && errno == EAGAIN) {
125
qemu_chr_fe_write_log(s, buf, *offset);
127
qemu_mutex_unlock(&s->chr_write_lock);
132
static bool qemu_chr_replay(Chardev *chr)
134
return qemu_chr_has_feature(chr, QEMU_CHAR_FEATURE_REPLAY);
137
int qemu_chr_fe_write(CharBackend *be, const uint8_t *buf, int len)
139
Chardev *s = be->chr;
147
if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_PLAY) {
149
replay_char_write_event_load(&ret, &offset);
150
assert(offset <= len);
151
qemu_chr_fe_write_buffer(s, buf, offset, &offset);
155
cc = CHARDEV_GET_CLASS(s);
156
qemu_mutex_lock(&s->chr_write_lock);
157
ret = cc->chr_write(s, buf, len);
160
qemu_chr_fe_write_log(s, buf, ret);
163
qemu_mutex_unlock(&s->chr_write_lock);
165
if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_RECORD) {
166
replay_char_write_event_save(ret, ret < 0 ? 0 : ret);
172
int qemu_chr_write_all(Chardev *s, const uint8_t *buf, int len)
177
if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_PLAY) {
178
replay_char_write_event_load(&res, &offset);
179
assert(offset <= len);
180
qemu_chr_fe_write_buffer(s, buf, offset, &offset);
184
res = qemu_chr_fe_write_buffer(s, buf, len, &offset);
186
if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_RECORD) {
187
replay_char_write_event_save(res, offset);
196
int qemu_chr_fe_write_all(CharBackend *be, const uint8_t *buf, int len)
198
Chardev *s = be->chr;
204
return qemu_chr_write_all(s, buf, len);
207
int qemu_chr_fe_read_all(CharBackend *be, uint8_t *buf, int len)
209
Chardev *s = be->chr;
210
int offset = 0, counter = 10;
213
if (!s || !CHARDEV_GET_CLASS(s)->chr_sync_read) {
217
if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_PLAY) {
218
return replay_char_read_all_load(buf);
221
while (offset < len) {
223
res = CHARDEV_GET_CLASS(s)->chr_sync_read(s, buf + offset,
225
if (res == -1 && errno == EAGAIN) {
235
if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_RECORD) {
236
replay_char_read_all_save_error(res);
248
if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_RECORD) {
249
replay_char_read_all_save_buf(buf, offset);
254
int qemu_chr_fe_ioctl(CharBackend *be, int cmd, void *arg)
256
Chardev *s = be->chr;
259
if (!s || !CHARDEV_GET_CLASS(s)->chr_ioctl || qemu_chr_replay(s)) {
262
res = CHARDEV_GET_CLASS(s)->chr_ioctl(s, cmd, arg);
268
int qemu_chr_be_can_write(Chardev *s)
270
CharBackend *be = s->be;
272
if (!be || !be->chr_can_read) {
276
return be->chr_can_read(be->opaque);
279
void qemu_chr_be_write_impl(Chardev *s, uint8_t *buf, int len)
281
CharBackend *be = s->be;
283
if (be && be->chr_read) {
284
be->chr_read(be->opaque, buf, len);
288
void qemu_chr_be_write(Chardev *s, uint8_t *buf, int len)
290
if (qemu_chr_replay(s)) {
291
if (replay_mode == REPLAY_MODE_PLAY) {
294
replay_chr_be_write(s, buf, len);
296
qemu_chr_be_write_impl(s, buf, len);
300
int qemu_chr_fe_get_msgfd(CharBackend *be)
302
Chardev *s = be->chr;
304
int res = (qemu_chr_fe_get_msgfds(be, &fd, 1) == 1) ? fd : -1;
305
if (s && qemu_chr_replay(s)) {
306
error_report("Replay: get msgfd is not supported "
307
"for serial devices yet");
313
int qemu_chr_fe_get_msgfds(CharBackend *be, int *fds, int len)
315
Chardev *s = be->chr;
321
return CHARDEV_GET_CLASS(s)->get_msgfds ?
322
CHARDEV_GET_CLASS(s)->get_msgfds(s, fds, len) : -1;
325
int qemu_chr_fe_set_msgfds(CharBackend *be, int *fds, int num)
327
Chardev *s = be->chr;
333
return CHARDEV_GET_CLASS(s)->set_msgfds ?
334
CHARDEV_GET_CLASS(s)->set_msgfds(s, fds, num) : -1;
337
int qemu_chr_add_client(Chardev *s, int fd)
339
return CHARDEV_GET_CLASS(s)->chr_add_client ?
340
CHARDEV_GET_CLASS(s)->chr_add_client(s, fd) : -1;
343
void qemu_chr_fe_accept_input(CharBackend *be)
345
Chardev *s = be->chr;
351
if (CHARDEV_GET_CLASS(s)->chr_accept_input) {
352
CHARDEV_GET_CLASS(s)->chr_accept_input(s);
357
void qemu_chr_fe_printf(CharBackend *be, const char *fmt, ...)
359
char buf[CHR_READ_BUF_LEN];
362
vsnprintf(buf, sizeof(buf), fmt, ap);
363
/* XXX this blocks entire thread. Rewrite to use
364
* qemu_chr_fe_write and background I/O callbacks */
365
qemu_chr_fe_write_all(be, (uint8_t *)buf, strlen(buf));
369
static void qemu_char_open(Chardev *chr, ChardevBackend *backend,
370
bool *be_opened, Error **errp)
372
ChardevClass *cc = CHARDEV_GET_CLASS(chr);
373
/* Any ChardevCommon member would work */
374
ChardevCommon *common = backend ? backend->u.null.data : NULL;
376
if (common && common->has_logfile) {
377
int flags = O_WRONLY | O_CREAT;
378
if (common->has_logappend &&
384
chr->logfd = qemu_open(common->logfile, flags, 0666);
385
if (chr->logfd < 0) {
386
error_setg_errno(errp, errno,
387
"Unable to open logfile %s",
394
cc->open(chr, backend, be_opened, errp);
398
static void char_init(Object *obj)
400
Chardev *chr = CHARDEV(obj);
403
qemu_mutex_init(&chr->chr_write_lock);
406
static int null_chr_write(Chardev *chr, const uint8_t *buf, int len)
411
static void char_class_init(ObjectClass *oc, void *data)
413
ChardevClass *cc = CHARDEV_CLASS(oc);
415
cc->chr_write = null_chr_write;
418
static void char_finalize(Object *obj)
420
Chardev *chr = CHARDEV(obj);
425
g_free(chr->filename);
427
if (chr->logfd != -1) {
430
qemu_mutex_destroy(&chr->chr_write_lock);
433
static const TypeInfo char_type_info = {
434
.name = TYPE_CHARDEV,
435
.parent = TYPE_OBJECT,
436
.instance_size = sizeof(Chardev),
437
.instance_init = char_init,
438
.instance_finalize = char_finalize,
440
.class_size = sizeof(ChardevClass),
441
.class_init = char_class_init,
445
* Called after processing of default and command-line-specified
446
* chardevs to deliver CHR_EVENT_OPENED events to any FEs attached
447
* to a mux chardev. This is done here to ensure that
448
* output/prompts/banners are only displayed for the FE that has
449
* focus when initial command-line processing/machine init is
452
* After this point, any new FE attached to any new or existing
453
* mux will receive CHR_EVENT_OPENED notifications for the BE
456
static void muxes_realize_done(Notifier *notifier, void *unused)
460
QTAILQ_FOREACH(chr, &chardevs, next) {
461
if (CHARDEV_IS_MUX(chr)) {
462
MuxChardev *d = MUX_CHARDEV(chr);
465
/* send OPENED to all already-attached FEs */
466
for (i = 0; i < d->mux_cnt; i++) {
467
mux_chr_send_event(d, i, CHR_EVENT_OPENED);
469
/* mark mux as OPENED so any new FEs will immediately receive
472
qemu_chr_be_generic_open(chr);
475
muxes_realized = true;
478
static Notifier muxes_realize_notify = {
479
.notify = muxes_realize_done,
482
Chardev *qemu_chr_fe_get_driver(CharBackend *be)
487
bool qemu_chr_fe_init(CharBackend *b, Chardev *s, Error **errp)
491
if (CHARDEV_IS_MUX(s)) {
492
MuxChardev *d = MUX_CHARDEV(s);
494
if (d->mux_cnt >= MAX_MUX) {
498
d->backends[d->mux_cnt] = b;
512
error_setg(errp, QERR_DEVICE_IN_USE, s->label);
516
static bool qemu_chr_is_busy(Chardev *s)
518
if (CHARDEV_IS_MUX(s)) {
519
MuxChardev *d = MUX_CHARDEV(s);
520
return d->mux_cnt >= 0;
522
return s->be != NULL;
526
void qemu_chr_fe_deinit(CharBackend *b)
531
qemu_chr_fe_set_handlers(b, NULL, NULL, NULL, NULL, NULL, true);
532
if (b->chr->be == b) {
535
if (CHARDEV_IS_MUX(b->chr)) {
536
MuxChardev *d = MUX_CHARDEV(b->chr);
537
d->backends[b->tag] = NULL;
543
void qemu_chr_fe_set_handlers(CharBackend *b,
544
IOCanReadHandler *fd_can_read,
545
IOReadHandler *fd_read,
546
IOEventHandler *fd_event,
548
GMainContext *context,
560
cc = CHARDEV_GET_CLASS(s);
561
if (!opaque && !fd_can_read && !fd_read && !fd_event) {
563
remove_fd_in_watch(s, context);
567
b->chr_can_read = fd_can_read;
568
b->chr_read = fd_read;
569
b->chr_event = fd_event;
571
if (cc->chr_update_read_handler) {
572
cc->chr_update_read_handler(s, context);
576
qemu_chr_fe_set_open(b, fe_open);
580
qemu_chr_fe_take_focus(b);
581
/* We're connecting to an already opened device, so let's make sure we
582
also get the open event */
584
qemu_chr_be_generic_open(s);
588
if (CHARDEV_IS_MUX(s)) {
589
mux_chr_set_handlers(s, context);
593
void qemu_chr_fe_take_focus(CharBackend *b)
599
if (CHARDEV_IS_MUX(b->chr)) {
600
mux_set_focus(b->chr, b->tag);
604
int qemu_chr_wait_connected(Chardev *chr, Error **errp)
606
ChardevClass *cc = CHARDEV_GET_CLASS(chr);
608
if (cc->chr_wait_connected) {
609
return cc->chr_wait_connected(chr, errp);
615
int qemu_chr_fe_wait_connected(CharBackend *be, Error **errp)
618
error_setg(errp, "missing associated backend");
622
return qemu_chr_wait_connected(be->chr, errp);
625
QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
627
char host[65], port[33], width[8], height[8];
631
Error *local_err = NULL;
633
opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
635
error_report_err(local_err);
639
if (strstart(filename, "mon:", &p)) {
641
qemu_opt_set(opts, "mux", "on", &error_abort);
642
if (strcmp(filename, "stdio") == 0) {
643
/* Monitor is muxed to stdio: do not exit on Ctrl+C by default
644
* but pass it to the guest. Handle this only for compat syntax,
645
* for -chardev syntax we have special option for this.
646
* This is what -nographic did, redirecting+muxing serial+monitor
647
* to stdio causing Ctrl+C to be passed to guest. */
648
qemu_opt_set(opts, "signal", "off", &error_abort);
652
if (strcmp(filename, "null") == 0 ||
653
strcmp(filename, "pty") == 0 ||
654
strcmp(filename, "msmouse") == 0 ||
655
strcmp(filename, "wctablet") == 0 ||
656
strcmp(filename, "braille") == 0 ||
657
strcmp(filename, "testdev") == 0 ||
658
strcmp(filename, "stdio") == 0) {
659
qemu_opt_set(opts, "backend", filename, &error_abort);
662
if (strstart(filename, "vc", &p)) {
663
qemu_opt_set(opts, "backend", "vc", &error_abort);
665
if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
667
qemu_opt_set(opts, "width", width, &error_abort);
668
qemu_opt_set(opts, "height", height, &error_abort);
669
} else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
671
qemu_opt_set(opts, "cols", width, &error_abort);
672
qemu_opt_set(opts, "rows", height, &error_abort);
679
if (strcmp(filename, "con:") == 0) {
680
qemu_opt_set(opts, "backend", "console", &error_abort);
683
if (strstart(filename, "COM", NULL)) {
684
qemu_opt_set(opts, "backend", "serial", &error_abort);
685
qemu_opt_set(opts, "path", filename, &error_abort);
688
if (strstart(filename, "file:", &p)) {
689
qemu_opt_set(opts, "backend", "file", &error_abort);
690
qemu_opt_set(opts, "path", p, &error_abort);
693
if (strstart(filename, "pipe:", &p)) {
694
qemu_opt_set(opts, "backend", "pipe", &error_abort);
695
qemu_opt_set(opts, "path", p, &error_abort);
698
if (strstart(filename, "tcp:", &p) ||
699
strstart(filename, "telnet:", &p)) {
700
if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
702
if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
705
qemu_opt_set(opts, "backend", "socket", &error_abort);
706
qemu_opt_set(opts, "host", host, &error_abort);
707
qemu_opt_set(opts, "port", port, &error_abort);
709
qemu_opts_do_parse(opts, p+pos+1, NULL, &local_err);
711
error_report_err(local_err);
715
if (strstart(filename, "telnet:", &p))
716
qemu_opt_set(opts, "telnet", "on", &error_abort);
719
if (strstart(filename, "udp:", &p)) {
720
qemu_opt_set(opts, "backend", "udp", &error_abort);
721
if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
723
if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
727
qemu_opt_set(opts, "host", host, &error_abort);
728
qemu_opt_set(opts, "port", port, &error_abort);
731
if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
733
if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
737
qemu_opt_set(opts, "localaddr", host, &error_abort);
738
qemu_opt_set(opts, "localport", port, &error_abort);
742
if (strstart(filename, "unix:", &p)) {
743
qemu_opt_set(opts, "backend", "socket", &error_abort);
744
qemu_opts_do_parse(opts, p, "path", &local_err);
746
error_report_err(local_err);
751
if (strstart(filename, "/dev/parport", NULL) ||
752
strstart(filename, "/dev/ppi", NULL)) {
753
qemu_opt_set(opts, "backend", "parport", &error_abort);
754
qemu_opt_set(opts, "path", filename, &error_abort);
757
if (strstart(filename, "/dev/", NULL)) {
758
qemu_opt_set(opts, "backend", "tty", &error_abort);
759
qemu_opt_set(opts, "path", filename, &error_abort);
768
void qemu_chr_parse_common(QemuOpts *opts, ChardevCommon *backend)
770
const char *logfile = qemu_opt_get(opts, "logfile");
772
backend->has_logfile = logfile != NULL;
773
backend->logfile = logfile ? g_strdup(logfile) : NULL;
775
backend->has_logappend = true;
776
backend->logappend = qemu_opt_get_bool(opts, "logappend", false);
779
static const ChardevClass *char_get_class(const char *driver, Error **errp)
782
const ChardevClass *cc;
783
char *typename = g_strdup_printf("chardev-%s", driver);
785
oc = object_class_by_name(typename);
788
if (!object_class_dynamic_cast(oc, TYPE_CHARDEV)) {
789
error_setg(errp, "'%s' is not a valid char driver name", driver);
793
if (object_class_is_abstract(oc)) {
794
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
795
"abstract device type");
799
cc = CHARDEV_CLASS(oc);
801
error_setg(errp, "'%s' is not a valid char driver name", driver);
808
static Chardev *qemu_chardev_add(const char *id, const char *typename,
809
ChardevBackend *backend, Error **errp)
813
chr = qemu_chr_find(id);
815
error_setg(errp, "Chardev '%s' already exists", id);
819
chr = qemu_chardev_new(id, typename, backend, errp);
824
QTAILQ_INSERT_TAIL(&chardevs, chr, next);
828
static const struct ChardevAlias {
829
const char *typename;
831
} chardev_alias_table[] = {
832
#ifdef HAVE_CHARDEV_PARPORT
833
{ "parallel", "parport" },
835
#ifdef HAVE_CHARDEV_SERIAL
840
typedef struct ChadevClassFE {
841
void (*fn)(const char *name, void *opaque);
846
chardev_class_foreach(ObjectClass *klass, void *opaque)
848
ChadevClassFE *fe = opaque;
850
assert(g_str_has_prefix(object_class_get_name(klass), "chardev-"));
851
if (CHARDEV_CLASS(klass)->internal) {
855
fe->fn(object_class_get_name(klass) + 8, fe->opaque);
859
chardev_name_foreach(void (*fn)(const char *name, void *opaque), void *opaque)
861
ChadevClassFE fe = { .fn = fn, .opaque = opaque };
864
object_class_foreach(chardev_class_foreach, TYPE_CHARDEV, false, &fe);
866
for (i = 0; i < ARRAY_SIZE(chardev_alias_table); i++) {
867
fn(chardev_alias_table[i].alias, opaque);
872
help_string_append(const char *name, void *opaque)
874
GString *str = opaque;
876
g_string_append_printf(str, "\n%s", name);
879
Chardev *qemu_chr_new_from_opts(QemuOpts *opts,
882
Error *local_err = NULL;
883
const ChardevClass *cc;
886
ChardevBackend *backend = NULL;
887
const char *name = qemu_opt_get(opts, "backend");
888
const char *id = qemu_opts_id(opts);
892
error_setg(errp, "chardev: \"%s\" missing backend",
897
if (is_help_option(name)) {
898
GString *str = g_string_new("");
900
chardev_name_foreach(help_string_append, str);
902
error_report("Available chardev backend types: %s", str->str);
903
g_string_free(str, true);
908
error_setg(errp, "chardev: no id specified");
912
for (i = 0; i < ARRAY_SIZE(chardev_alias_table); i++) {
913
if (g_strcmp0(chardev_alias_table[i].alias, name) == 0) {
914
name = chardev_alias_table[i].typename;
919
cc = char_get_class(name, errp);
924
backend = g_new0(ChardevBackend, 1);
925
backend->type = CHARDEV_BACKEND_KIND_NULL;
927
if (qemu_opt_get_bool(opts, "mux", 0)) {
928
bid = g_strdup_printf("%s-base", id);
933
cc->parse(opts, backend, &local_err);
935
error_propagate(errp, local_err);
939
ChardevCommon *ccom = g_new0(ChardevCommon, 1);
940
qemu_chr_parse_common(opts, ccom);
941
backend->u.null.data = ccom; /* Any ChardevCommon member would work */
944
chr = qemu_chardev_add(bid ? bid : id,
945
object_class_get_name(OBJECT_CLASS(cc)),
953
qapi_free_ChardevBackend(backend);
954
backend = g_new0(ChardevBackend, 1);
955
backend->type = CHARDEV_BACKEND_KIND_MUX;
956
backend->u.mux.data = g_new0(ChardevMux, 1);
957
backend->u.mux.data->chardev = g_strdup(bid);
958
mux = qemu_chardev_add(id, TYPE_CHARDEV_MUX, backend, errp);
960
qemu_chr_delete(chr);
968
qapi_free_ChardevBackend(backend);
973
Chardev *qemu_chr_new_noreplay(const char *label, const char *filename)
980
if (strstart(filename, "chardev:", &p)) {
981
return qemu_chr_find(p);
984
opts = qemu_chr_parse_compat(label, filename);
988
chr = qemu_chr_new_from_opts(opts, &err);
990
error_report_err(err);
992
if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
993
monitor_init(chr, MONITOR_USE_READLINE);
999
Chardev *qemu_chr_new(const char *label, const char *filename)
1002
chr = qemu_chr_new_noreplay(label, filename);
1004
if (replay_mode != REPLAY_MODE_NONE) {
1005
qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_REPLAY);
1007
if (qemu_chr_replay(chr) && CHARDEV_GET_CLASS(chr)->chr_ioctl) {
1008
error_report("Replay: ioctl is not supported "
1009
"for serial devices yet");
1011
replay_register_char_driver(chr);
1016
void qemu_chr_fe_set_echo(CharBackend *be, bool echo)
1018
Chardev *chr = be->chr;
1020
if (chr && CHARDEV_GET_CLASS(chr)->chr_set_echo) {
1021
CHARDEV_GET_CLASS(chr)->chr_set_echo(chr, echo);
1025
void qemu_chr_fe_set_open(CharBackend *be, int fe_open)
1027
Chardev *chr = be->chr;
1033
if (be->fe_open == fe_open) {
1036
be->fe_open = fe_open;
1037
if (CHARDEV_GET_CLASS(chr)->chr_set_fe_open) {
1038
CHARDEV_GET_CLASS(chr)->chr_set_fe_open(chr, fe_open);
1042
guint qemu_chr_fe_add_watch(CharBackend *be, GIOCondition cond,
1043
GIOFunc func, void *user_data)
1045
Chardev *s = be->chr;
1049
if (!s || CHARDEV_GET_CLASS(s)->chr_add_watch == NULL) {
1053
src = CHARDEV_GET_CLASS(s)->chr_add_watch(s, cond);
1058
g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
1059
tag = g_source_attach(src, NULL);
1060
g_source_unref(src);
1065
void qemu_chr_fe_disconnect(CharBackend *be)
1067
Chardev *chr = be->chr;
1069
if (chr && CHARDEV_GET_CLASS(chr)->chr_disconnect) {
1070
CHARDEV_GET_CLASS(chr)->chr_disconnect(chr);
1074
void qemu_chr_delete(Chardev *chr)
1076
QTAILQ_REMOVE(&chardevs, chr, next);
1077
object_unref(OBJECT(chr));
1080
ChardevInfoList *qmp_query_chardev(Error **errp)
1082
ChardevInfoList *chr_list = NULL;
1085
QTAILQ_FOREACH(chr, &chardevs, next) {
1086
ChardevInfoList *info = g_malloc0(sizeof(*info));
1087
info->value = g_malloc0(sizeof(*info->value));
1088
info->value->label = g_strdup(chr->label);
1089
info->value->filename = g_strdup(chr->filename);
1090
info->value->frontend_open = chr->be && chr->be->fe_open;
1092
info->next = chr_list;
1100
qmp_prepend_backend(const char *name, void *opaque)
1102
ChardevBackendInfoList **list = opaque;
1103
ChardevBackendInfoList *info = g_malloc0(sizeof(*info));
1105
info->value = g_malloc0(sizeof(*info->value));
1106
info->value->name = g_strdup(name);
1111
ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp)
1113
ChardevBackendInfoList *backend_list = NULL;
1115
chardev_name_foreach(qmp_prepend_backend, &backend_list);
1117
return backend_list;
1120
Chardev *qemu_chr_find(const char *name)
1124
QTAILQ_FOREACH(chr, &chardevs, next) {
1125
if (strcmp(chr->label, name) != 0)
1132
QemuOptsList qemu_chardev_opts = {
1134
.implied_opt_name = "backend",
1135
.head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
1139
.type = QEMU_OPT_STRING,
1142
.type = QEMU_OPT_STRING,
1145
.type = QEMU_OPT_STRING,
1148
.type = QEMU_OPT_STRING,
1150
.name = "localaddr",
1151
.type = QEMU_OPT_STRING,
1153
.name = "localport",
1154
.type = QEMU_OPT_STRING,
1157
.type = QEMU_OPT_NUMBER,
1160
.type = QEMU_OPT_BOOL,
1163
.type = QEMU_OPT_BOOL,
1166
.type = QEMU_OPT_BOOL,
1169
.type = QEMU_OPT_BOOL,
1172
.type = QEMU_OPT_BOOL,
1174
.name = "reconnect",
1175
.type = QEMU_OPT_NUMBER,
1178
.type = QEMU_OPT_BOOL,
1180
.name = "tls-creds",
1181
.type = QEMU_OPT_STRING,
1184
.type = QEMU_OPT_NUMBER,
1187
.type = QEMU_OPT_NUMBER,
1190
.type = QEMU_OPT_NUMBER,
1193
.type = QEMU_OPT_NUMBER,
1196
.type = QEMU_OPT_BOOL,
1199
.type = QEMU_OPT_BOOL,
1202
.type = QEMU_OPT_STRING,
1205
.type = QEMU_OPT_NUMBER,
1208
.type = QEMU_OPT_SIZE,
1211
.type = QEMU_OPT_STRING,
1214
.type = QEMU_OPT_BOOL,
1217
.type = QEMU_OPT_STRING,
1219
.name = "logappend",
1220
.type = QEMU_OPT_BOOL,
1222
{ /* end of list */ }
1226
bool qemu_chr_has_feature(Chardev *chr,
1227
ChardevFeature feature)
1229
return test_bit(feature, chr->features);
1232
void qemu_chr_set_feature(Chardev *chr,
1233
ChardevFeature feature)
1235
return set_bit(feature, chr->features);
1238
Chardev *qemu_chardev_new(const char *id, const char *typename,
1239
ChardevBackend *backend, Error **errp)
1241
Chardev *chr = NULL;
1242
Error *local_err = NULL;
1243
bool be_opened = true;
1245
assert(g_str_has_prefix(typename, "chardev-"));
1247
chr = CHARDEV(object_new(typename));
1248
chr->label = g_strdup(id);
1250
qemu_char_open(chr, backend, &be_opened, &local_err);
1252
error_propagate(errp, local_err);
1253
object_unref(OBJECT(chr));
1257
if (!chr->filename) {
1258
chr->filename = g_strdup(typename + 8);
1261
qemu_chr_be_event(chr, CHR_EVENT_OPENED);
1267
ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
1270
const ChardevClass *cc;
1274
cc = char_get_class(ChardevBackendKind_lookup[backend->type], errp);
1279
chr = qemu_chardev_add(id, object_class_get_name(OBJECT_CLASS(cc)),
1285
ret = g_new0(ChardevReturn, 1);
1286
if (CHARDEV_IS_PTY(chr)) {
1287
ret->pty = g_strdup(chr->filename + 4);
1288
ret->has_pty = true;
1294
void qmp_chardev_remove(const char *id, Error **errp)
1298
chr = qemu_chr_find(id);
1300
error_setg(errp, "Chardev '%s' not found", id);
1303
if (qemu_chr_is_busy(chr)) {
1304
error_setg(errp, "Chardev '%s' is busy", id);
1307
if (qemu_chr_replay(chr)) {
1309
"Chardev '%s' cannot be unplugged in record/replay mode", id);
1312
qemu_chr_delete(chr);
1315
void qemu_chr_cleanup(void)
1319
QTAILQ_FOREACH_SAFE(chr, &chardevs, next, tmp) {
1320
qemu_chr_delete(chr);
1324
static void register_types(void)
1326
type_register_static(&char_type_info);
1328
/* this must be done after machine init, since we register FEs with muxes
1329
* as part of realize functions like serial_isa_realizefn when -nographic
1332
qemu_add_machine_init_done_notifier(&muxes_realize_notify);
1335
type_init(register_types);