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char: move mux to its own file

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A mechanical move, except that qemu_chr_write_all() needs to be declared
in char.h header to be used from chardev unit files.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Marc-André Lureau 2016-12-12 15:06:14 +03:00
parent 247c92af2b
commit df85a78bf8
5 changed files with 426 additions and 351 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
chardev/Makefile.objs
View File

@ -1,2 +1,3 @@
chardev-obj-y += char.o
chardev-obj-y += char-mux.o
chardev-obj-y += char-null.o

358
chardev/char-mux.c Normal file
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@ -0,0 +1,358 @@
/*
* QEMU System Emulator
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "sysemu/char.h"
#include "sysemu/block-backend.h"
#include "char-mux.h"
/* MUX driver for serial I/O splitting */
/* Called with chr_write_lock held. */
static int mux_chr_write(Chardev *chr, const uint8_t *buf, int len)
{
MuxChardev *d = MUX_CHARDEV(chr);
int ret;
if (!d->timestamps) {
ret = qemu_chr_fe_write(&d->chr, buf, len);
} else {
int i;
ret = 0;
for (i = 0; i < len; i++) {
if (d->linestart) {
char buf1[64];
int64_t ti;
int secs;
ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
if (d->timestamps_start == -1) {
d->timestamps_start = ti;
}
ti -= d->timestamps_start;
secs = ti / 1000;
snprintf(buf1, sizeof(buf1),
"[%02d:%02d:%02d.%03d] ",
secs / 3600,
(secs / 60) % 60,
secs % 60,
(int)(ti % 1000));
/* XXX this blocks entire thread. Rewrite to use
* qemu_chr_fe_write and background I/O callbacks */
qemu_chr_fe_write_all(&d->chr,
(uint8_t *)buf1, strlen(buf1));
d->linestart = 0;
}
ret += qemu_chr_fe_write(&d->chr, buf + i, 1);
if (buf[i] == '\n') {
d->linestart = 1;
}
}
}
return ret;
}
static const char * const mux_help[] = {
"% h print this help\n\r",
"% x exit emulator\n\r",
"% s save disk data back to file (if -snapshot)\n\r",
"% t toggle console timestamps\n\r",
"% b send break (magic sysrq)\n\r",
"% c switch between console and monitor\n\r",
"% % sends %\n\r",
NULL
};
int term_escape_char = 0x01; /* ctrl-a is used for escape */
static void mux_print_help(Chardev *chr)
{
int i, j;
char ebuf[15] = "Escape-Char";
char cbuf[50] = "\n\r";
if (term_escape_char > 0 && term_escape_char < 26) {
snprintf(cbuf, sizeof(cbuf), "\n\r");
snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
} else {
snprintf(cbuf, sizeof(cbuf),
"\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
term_escape_char);
}
/* XXX this blocks entire thread. Rewrite to use
* qemu_chr_fe_write and background I/O callbacks */
qemu_chr_write_all(chr, (uint8_t *)cbuf, strlen(cbuf));
for (i = 0; mux_help[i] != NULL; i++) {
for (j = 0; mux_help[i][j] != '\0'; j++) {
if (mux_help[i][j] == '%') {
qemu_chr_write_all(chr, (uint8_t *)ebuf, strlen(ebuf));
} else {
qemu_chr_write_all(chr, (uint8_t *)&mux_help[i][j], 1);
}
}
}
}
void mux_chr_send_event(MuxChardev *d, int mux_nr, int event)
{
CharBackend *be = d->backends[mux_nr];
if (be && be->chr_event) {
be->chr_event(be->opaque, event);
}
}
static int mux_proc_byte(Chardev *chr, MuxChardev *d, int ch)
{
if (d->term_got_escape) {
d->term_got_escape = 0;
if (ch == term_escape_char) {
goto send_char;
}
switch (ch) {
case '?':
case 'h':
mux_print_help(chr);
break;
case 'x':
{
const char *term = "QEMU: Terminated\n\r";
qemu_chr_write_all(chr, (uint8_t *)term, strlen(term));
exit(0);
break;
}
case 's':
blk_commit_all();
break;
case 'b':
qemu_chr_be_event(chr, CHR_EVENT_BREAK);
break;
case 'c':
assert(d->mux_cnt > 0); /* handler registered with first fe */
/* Switch to the next registered device */
mux_set_focus(chr, (d->focus + 1) % d->mux_cnt);
break;
case 't':
d->timestamps = !d->timestamps;
d->timestamps_start = -1;
d->linestart = 0;
break;
}
} else if (ch == term_escape_char) {
d->term_got_escape = 1;
} else {
send_char:
return 1;
}
return 0;
}
static void mux_chr_accept_input(Chardev *chr)
{
MuxChardev *d = MUX_CHARDEV(chr);
int m = d->focus;
CharBackend *be = d->backends[m];
while (be && d->prod[m] != d->cons[m] &&
be->chr_can_read && be->chr_can_read(be->opaque)) {
be->chr_read(be->opaque,
&d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
}
}
static int mux_chr_can_read(void *opaque)
{
MuxChardev *d = MUX_CHARDEV(opaque);
int m = d->focus;
CharBackend *be = d->backends[m];
if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE) {
return 1;
}
if (be && be->chr_can_read) {
return be->chr_can_read(be->opaque);
}
return 0;
}
static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
{
Chardev *chr = CHARDEV(opaque);
MuxChardev *d = MUX_CHARDEV(opaque);
int m = d->focus;
CharBackend *be = d->backends[m];
int i;
mux_chr_accept_input(opaque);
for (i = 0; i < size; i++)
if (mux_proc_byte(chr, d, buf[i])) {
if (d->prod[m] == d->cons[m] &&
be && be->chr_can_read &&
be->chr_can_read(be->opaque)) {
be->chr_read(be->opaque, &buf[i], 1);
} else {
d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
}
}
}
bool muxes_realized;
static void mux_chr_event(void *opaque, int event)
{
MuxChardev *d = MUX_CHARDEV(opaque);
int i;
if (!muxes_realized) {
return;
}
/* Send the event to all registered listeners */
for (i = 0; i < d->mux_cnt; i++) {
mux_chr_send_event(d, i, event);
}
}
static GSource *mux_chr_add_watch(Chardev *s, GIOCondition cond)
{
MuxChardev *d = MUX_CHARDEV(s);
Chardev *chr = qemu_chr_fe_get_driver(&d->chr);
ChardevClass *cc = CHARDEV_GET_CLASS(chr);
if (!cc->chr_add_watch) {
return NULL;
}
return cc->chr_add_watch(chr, cond);
}
static void char_mux_finalize(Object *obj)
{
MuxChardev *d = MUX_CHARDEV(obj);
int i;
for (i = 0; i < d->mux_cnt; i++) {
CharBackend *be = d->backends[i];
if (be) {
be->chr = NULL;
}
}
qemu_chr_fe_deinit(&d->chr);
}
void mux_chr_set_handlers(Chardev *chr, GMainContext *context)
{
MuxChardev *d = MUX_CHARDEV(chr);
/* Fix up the real driver with mux routines */
qemu_chr_fe_set_handlers(&d->chr,
mux_chr_can_read,
mux_chr_read,
mux_chr_event,
chr,
context, true);
}
void mux_set_focus(Chardev *chr, int focus)
{
MuxChardev *d = MUX_CHARDEV(chr);
assert(focus >= 0);
assert(focus < d->mux_cnt);
if (d->focus != -1) {
mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
}
d->focus = focus;
mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
}
static void qemu_chr_open_mux(Chardev *chr,
ChardevBackend *backend,
bool *be_opened,
Error **errp)
{
ChardevMux *mux = backend->u.mux.data;
Chardev *drv;
MuxChardev *d = MUX_CHARDEV(chr);
drv = qemu_chr_find(mux->chardev);
if (drv == NULL) {
error_setg(errp, "mux: base chardev %s not found", mux->chardev);
return;
}
d->focus = -1;
/* only default to opened state if we've realized the initial
* set of muxes
*/
*be_opened = muxes_realized;
qemu_chr_fe_init(&d->chr, drv, errp);
}
static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
const char *chardev = qemu_opt_get(opts, "chardev");
ChardevMux *mux;
if (chardev == NULL) {
error_setg(errp, "chardev: mux: no chardev given");
return;
}
backend->type = CHARDEV_BACKEND_KIND_MUX;
mux = backend->u.mux.data = g_new0(ChardevMux, 1);
qemu_chr_parse_common(opts, qapi_ChardevMux_base(mux));
mux->chardev = g_strdup(chardev);
}
static void char_mux_class_init(ObjectClass *oc, void *data)
{
ChardevClass *cc = CHARDEV_CLASS(oc);
cc->parse = qemu_chr_parse_mux;
cc->open = qemu_chr_open_mux;
cc->chr_write = mux_chr_write;
cc->chr_accept_input = mux_chr_accept_input;
cc->chr_add_watch = mux_chr_add_watch;
}
static const TypeInfo char_mux_type_info = {
.name = TYPE_CHARDEV_MUX,
.parent = TYPE_CHARDEV,
.class_init = char_mux_class_init,
.instance_size = sizeof(MuxChardev),
.instance_finalize = char_mux_finalize,
};
static void register_types(void)
{
type_register_static(&char_mux_type_info);
}
type_init(register_types);

63
chardev/char-mux.h Normal file
View File

@ -0,0 +1,63 @@
/*
* QEMU System Emulator
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef CHAR_MUX_H
#define CHAR_MUX_H
#include "sysemu/char.h"
extern bool muxes_realized;
#define MAX_MUX 4
#define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
#define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
typedef struct MuxChardev {
Chardev parent;
CharBackend *backends[MAX_MUX];
CharBackend chr;
int focus;
int mux_cnt;
int term_got_escape;
int max_size;
/* Intermediate input buffer catches escape sequences even if the
currently active device is not accepting any input - but only until it
is full as well. */
unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
int prod[MAX_MUX];
int cons[MAX_MUX];
int timestamps;
/* Protected by the Chardev chr_write_lock. */
int linestart;
int64_t timestamps_start;
} MuxChardev;
#define MUX_CHARDEV(obj) OBJECT_CHECK(MuxChardev, (obj), TYPE_CHARDEV_MUX)
#define CHARDEV_IS_MUX(chr) \
object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_MUX)
void mux_chr_set_handlers(Chardev *chr, GMainContext *context);
void mux_set_focus(Chardev *chr, int focus);
void mux_chr_send_event(MuxChardev *d, int mux_nr, int event);
#endif /* CHAR_MUX_H */

352
chardev/char.c
View File

@ -85,12 +85,12 @@
#include "qemu/sockets.h"
#include "ui/qemu-spice.h"
#include "char-mux.h"
#define READ_BUF_LEN 4096
#define READ_RETRIES 10
#define TCP_MAX_FDS 16
typedef struct MuxChardev MuxChardev;
/***********************************************************/
/* Socket address helpers */
@ -284,7 +284,7 @@ int qemu_chr_fe_write(CharBackend *be, const uint8_t *buf, int len)
return ret;
}
static int qemu_chr_write_all(Chardev *s, const uint8_t *buf, int len)
int qemu_chr_write_all(Chardev *s, const uint8_t *buf, int len)
{
int offset;
int res;
@ -482,8 +482,6 @@ void qemu_chr_fe_printf(CharBackend *be, const char *fmt, ...)
}
static void remove_fd_in_watch(Chardev *chr);
static void mux_chr_set_handlers(Chardev *chr, GMainContext *context);
static void mux_set_focus(Chardev *chr, int focus);
static void qemu_char_open(Chardev *chr, ChardevBackend *backend,
bool *be_opened, Error **errp)
@ -560,235 +558,6 @@ static const TypeInfo char_type_info = {
.class_init = char_class_init,
};
/* MUX driver for serial I/O splitting */
#define MAX_MUX 4
#define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
#define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
struct MuxChardev {
Chardev parent;
CharBackend *backends[MAX_MUX];
CharBackend chr;
int focus;
int mux_cnt;
int term_got_escape;
int max_size;
/* Intermediate input buffer allows to catch escape sequences even if the
currently active device is not accepting any input - but only until it
is full as well. */
unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
int prod[MAX_MUX];
int cons[MAX_MUX];
int timestamps;
/* Protected by the Chardev chr_write_lock. */
int linestart;
int64_t timestamps_start;
};
#define MUX_CHARDEV(obj) OBJECT_CHECK(MuxChardev, (obj), TYPE_CHARDEV_MUX)
/* Called with chr_write_lock held. */
static int mux_chr_write(Chardev *chr, const uint8_t *buf, int len)
{
MuxChardev *d = MUX_CHARDEV(chr);
int ret;
if (!d->timestamps) {
ret = qemu_chr_fe_write(&d->chr, buf, len);
} else {
int i;
ret = 0;
for (i = 0; i < len; i++) {
if (d->linestart) {
char buf1[64];
int64_t ti;
int secs;
ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
if (d->timestamps_start == -1)
d->timestamps_start = ti;
ti -= d->timestamps_start;
secs = ti / 1000;
snprintf(buf1, sizeof(buf1),
"[%02d:%02d:%02d.%03d] ",
secs / 3600,
(secs / 60) % 60,
secs % 60,
(int)(ti % 1000));
/* XXX this blocks entire thread. Rewrite to use
* qemu_chr_fe_write and background I/O callbacks */
qemu_chr_fe_write_all(&d->chr,
(uint8_t *)buf1, strlen(buf1));
d->linestart = 0;
}
ret += qemu_chr_fe_write(&d->chr, buf + i, 1);
if (buf[i] == '\n') {
d->linestart = 1;
}
}
}
return ret;
}
static const char * const mux_help[] = {
"% h print this help\n\r",
"% x exit emulator\n\r",
"% s save disk data back to file (if -snapshot)\n\r",
"% t toggle console timestamps\n\r",
"% b send break (magic sysrq)\n\r",
"% c switch between console and monitor\n\r",
"% % sends %\n\r",
NULL
};
int term_escape_char = 0x01; /* ctrl-a is used for escape */
static void mux_print_help(Chardev *chr)
{
int i, j;
char ebuf[15] = "Escape-Char";
char cbuf[50] = "\n\r";
if (term_escape_char > 0 && term_escape_char < 26) {
snprintf(cbuf, sizeof(cbuf), "\n\r");
snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
} else {
snprintf(cbuf, sizeof(cbuf),
"\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
term_escape_char);
}
/* XXX this blocks entire thread. Rewrite to use
* qemu_chr_fe_write and background I/O callbacks */
qemu_chr_write_all(chr, (uint8_t *)cbuf, strlen(cbuf));
for (i = 0; mux_help[i] != NULL; i++) {
for (j=0; mux_help[i][j] != '\0'; j++) {
if (mux_help[i][j] == '%')
qemu_chr_write_all(chr, (uint8_t *)ebuf, strlen(ebuf));
else
qemu_chr_write_all(chr, (uint8_t *)&mux_help[i][j], 1);
}
}
}
static void mux_chr_send_event(MuxChardev *d, int mux_nr, int event)
{
CharBackend *be = d->backends[mux_nr];
if (be && be->chr_event) {
be->chr_event(be->opaque, event);
}
}
static int mux_proc_byte(Chardev *chr, MuxChardev *d, int ch)
{
if (d->term_got_escape) {
d->term_got_escape = 0;
if (ch == term_escape_char)
goto send_char;
switch(ch) {
case '?':
case 'h':
mux_print_help(chr);
break;
case 'x':
{
const char *term = "QEMU: Terminated\n\r";
qemu_chr_write_all(chr, (uint8_t *)term, strlen(term));
exit(0);
break;
}
case 's':
blk_commit_all();
break;
case 'b':
qemu_chr_be_event(chr, CHR_EVENT_BREAK);
break;
case 'c':
assert(d->mux_cnt > 0); /* handler registered with first fe */
/* Switch to the next registered device */
mux_set_focus(chr, (d->focus + 1) % d->mux_cnt);
break;
case 't':
d->timestamps = !d->timestamps;
d->timestamps_start = -1;
d->linestart = 0;
break;
}
} else if (ch == term_escape_char) {
d->term_got_escape = 1;
} else {
send_char:
return 1;
}
return 0;
}
static void mux_chr_accept_input(Chardev *chr)
{
MuxChardev *d = MUX_CHARDEV(chr);
int m = d->focus;
CharBackend *be = d->backends[m];
while (be && d->prod[m] != d->cons[m] &&
be->chr_can_read && be->chr_can_read(be->opaque)) {
be->chr_read(be->opaque,
&d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
}
}
static int mux_chr_can_read(void *opaque)
{
MuxChardev *d = MUX_CHARDEV(opaque);
int m = d->focus;
CharBackend *be = d->backends[m];
if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE) {
return 1;
}
if (be && be->chr_can_read) {
return be->chr_can_read(be->opaque);
}
return 0;
}
static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
{
Chardev *chr = CHARDEV(opaque);
MuxChardev *d = MUX_CHARDEV(opaque);
int m = d->focus;
CharBackend *be = d->backends[m];
int i;
mux_chr_accept_input(opaque);
for (i = 0; i < size; i++)
if (mux_proc_byte(chr, d, buf[i])) {
if (d->prod[m] == d->cons[m] &&
be && be->chr_can_read &&
be->chr_can_read(be->opaque))
be->chr_read(be->opaque, &buf[i], 1);
else
d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
}
}
static bool muxes_realized;
static void mux_chr_event(void *opaque, int event)
{
MuxChardev *d = MUX_CHARDEV(opaque);
int i;
if (!muxes_realized) {
return;
}
/* Send the event to all registered listeners */
for (i = 0; i < d->mux_cnt; i++)
mux_chr_send_event(d, i, event);
}
/**
* Called after processing of default and command-line-specified
* chardevs to deliver CHR_EVENT_OPENED events to any FEs attached
@ -827,85 +596,6 @@ static Notifier muxes_realize_notify = {
.notify = muxes_realize_done,
};
static GSource *mux_chr_add_watch(Chardev *s, GIOCondition cond)
{
MuxChardev *d = MUX_CHARDEV(s);
Chardev *chr = qemu_chr_fe_get_driver(&d->chr);
ChardevClass *cc = CHARDEV_GET_CLASS(chr);
if (!cc->chr_add_watch) {
return NULL;
}
return cc->chr_add_watch(chr, cond);
}
static void char_mux_finalize(Object *obj)
{
MuxChardev *d = MUX_CHARDEV(obj);
int i;
for (i = 0; i < d->mux_cnt; i++) {
CharBackend *be = d->backends[i];
if (be) {
be->chr = NULL;
}
}
qemu_chr_fe_deinit(&d->chr);
}
static void mux_chr_set_handlers(Chardev *chr, GMainContext *context)
{
MuxChardev *d = MUX_CHARDEV(chr);
/* Fix up the real driver with mux routines */
qemu_chr_fe_set_handlers(&d->chr,
mux_chr_can_read,
mux_chr_read,
mux_chr_event,
chr,
context, true);
}
static void mux_set_focus(Chardev *chr, int focus)
{
MuxChardev *d = MUX_CHARDEV(chr);
assert(focus >= 0);
assert(focus < d->mux_cnt);
if (d->focus != -1) {
mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
}
d->focus = focus;
chr->be = d->backends[focus];
mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
}
static void qemu_chr_open_mux(Chardev *chr,
ChardevBackend *backend,
bool *be_opened,
Error **errp)
{
ChardevMux *mux = backend->u.mux.data;
Chardev *drv;
MuxChardev *d = MUX_CHARDEV(chr);
drv = qemu_chr_find(mux->chardev);
if (drv == NULL) {
error_setg(errp, "mux: base chardev %s not found", mux->chardev);
return;
}
d->focus = -1;
/* only default to opened state if we've realized the initial
* set of muxes
*/
*be_opened = muxes_realized;
qemu_chr_fe_init(&d->chr, drv, errp);
}
Chardev *qemu_chr_fe_get_driver(CharBackend *be)
{
return be->chr;
@ -3950,41 +3640,6 @@ static const TypeInfo char_memory_type_info = {
.parent = TYPE_CHARDEV_RINGBUF,
};
static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
const char *chardev = qemu_opt_get(opts, "chardev");
ChardevMux *mux;
backend->type = CHARDEV_BACKEND_KIND_MUX;
if (chardev == NULL) {
error_setg(errp, "chardev: mux: no chardev given");
return;
}
mux = backend->u.mux.data = g_new0(ChardevMux, 1);
qemu_chr_parse_common(opts, qapi_ChardevMux_base(mux));
mux->chardev = g_strdup(chardev);
}
static void char_mux_class_init(ObjectClass *oc, void *data)
{
ChardevClass *cc = CHARDEV_CLASS(oc);
cc->parse = qemu_chr_parse_mux;
cc->open = qemu_chr_open_mux;
cc->chr_write = mux_chr_write;
cc->chr_accept_input = mux_chr_accept_input;
cc->chr_add_watch = mux_chr_add_watch;
}
static const TypeInfo char_mux_type_info = {
.name = TYPE_CHARDEV_MUX,
.parent = TYPE_CHARDEV,
.class_init = char_mux_class_init,
.instance_size = sizeof(MuxChardev),
.instance_finalize = char_mux_finalize,
};
static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
@ -5101,7 +4756,6 @@ static void register_types(void)
type_register_static(&char_console_type_info);
#endif
type_register_static(&char_pipe_type_info);
type_register_static(&char_mux_type_info);
type_register_static(&char_memory_type_info);
/* this must be done after machine init, since we register FEs with muxes

3
include/sysemu/char.h
View File

@ -441,6 +441,7 @@ bool qemu_chr_has_feature(Chardev *chr,
void qemu_chr_set_feature(Chardev *chr,
ChardevFeature feature);
QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename);
int qemu_chr_write_all(Chardev *s, const uint8_t *buf, int len);
#define TYPE_CHARDEV "chardev"
#define CHARDEV(obj) OBJECT_CHECK(Chardev, (obj), TYPE_CHARDEV)
@ -463,8 +464,6 @@ QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename);
#define TYPE_CHARDEV_SOCKET "chardev-socket"
#define TYPE_CHARDEV_UDP "chardev-udp"
#define CHARDEV_IS_MUX(chr) \
object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_MUX)
#define CHARDEV_IS_RINGBUF(chr) \
object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_RINGBUF)
#define CHARDEV_IS_PTY(chr) \