387 lines
9.4 KiB
C
387 lines
9.4 KiB
C
/*
|
|
* 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 "qemu/error-report.h"
|
|
#include "qapi/error.h"
|
|
#include "qapi/qmp/qerror.h"
|
|
#include "sysemu/replay.h"
|
|
|
|
#include "chardev/char-fe.h"
|
|
#include "chardev/char-io.h"
|
|
#include "chardev-internal.h"
|
|
|
|
int qemu_chr_fe_write(CharBackend *be, const uint8_t *buf, int len)
|
|
{
|
|
Chardev *s = be->chr;
|
|
|
|
if (!s) {
|
|
return 0;
|
|
}
|
|
|
|
return qemu_chr_write(s, buf, len, false);
|
|
}
|
|
|
|
int qemu_chr_fe_write_all(CharBackend *be, const uint8_t *buf, int len)
|
|
{
|
|
Chardev *s = be->chr;
|
|
|
|
if (!s) {
|
|
return 0;
|
|
}
|
|
|
|
return qemu_chr_write(s, buf, len, true);
|
|
}
|
|
|
|
int qemu_chr_fe_read_all(CharBackend *be, uint8_t *buf, int len)
|
|
{
|
|
Chardev *s = be->chr;
|
|
int offset = 0;
|
|
int res;
|
|
|
|
if (!s || !CHARDEV_GET_CLASS(s)->chr_sync_read) {
|
|
return 0;
|
|
}
|
|
|
|
if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_PLAY) {
|
|
return replay_char_read_all_load(buf);
|
|
}
|
|
|
|
while (offset < len) {
|
|
retry:
|
|
res = CHARDEV_GET_CLASS(s)->chr_sync_read(s, buf + offset,
|
|
len - offset);
|
|
if (res == -1 && errno == EAGAIN) {
|
|
g_usleep(100);
|
|
goto retry;
|
|
}
|
|
|
|
if (res == 0) {
|
|
break;
|
|
}
|
|
|
|
if (res < 0) {
|
|
if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_RECORD) {
|
|
replay_char_read_all_save_error(res);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
offset += res;
|
|
}
|
|
|
|
if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_RECORD) {
|
|
replay_char_read_all_save_buf(buf, offset);
|
|
}
|
|
return offset;
|
|
}
|
|
|
|
int qemu_chr_fe_ioctl(CharBackend *be, int cmd, void *arg)
|
|
{
|
|
Chardev *s = be->chr;
|
|
int res;
|
|
|
|
if (!s || !CHARDEV_GET_CLASS(s)->chr_ioctl || qemu_chr_replay(s)) {
|
|
res = -ENOTSUP;
|
|
} else {
|
|
res = CHARDEV_GET_CLASS(s)->chr_ioctl(s, cmd, arg);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
int qemu_chr_fe_get_msgfd(CharBackend *be)
|
|
{
|
|
Chardev *s = be->chr;
|
|
int fd;
|
|
int res = (qemu_chr_fe_get_msgfds(be, &fd, 1) == 1) ? fd : -1;
|
|
if (s && qemu_chr_replay(s)) {
|
|
error_report("Replay: get msgfd is not supported "
|
|
"for serial devices yet");
|
|
exit(1);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
int qemu_chr_fe_get_msgfds(CharBackend *be, int *fds, int len)
|
|
{
|
|
Chardev *s = be->chr;
|
|
|
|
if (!s) {
|
|
return -1;
|
|
}
|
|
|
|
return CHARDEV_GET_CLASS(s)->get_msgfds ?
|
|
CHARDEV_GET_CLASS(s)->get_msgfds(s, fds, len) : -1;
|
|
}
|
|
|
|
int qemu_chr_fe_set_msgfds(CharBackend *be, int *fds, int num)
|
|
{
|
|
Chardev *s = be->chr;
|
|
|
|
if (!s) {
|
|
return -1;
|
|
}
|
|
|
|
return CHARDEV_GET_CLASS(s)->set_msgfds ?
|
|
CHARDEV_GET_CLASS(s)->set_msgfds(s, fds, num) : -1;
|
|
}
|
|
|
|
void qemu_chr_fe_accept_input(CharBackend *be)
|
|
{
|
|
Chardev *s = be->chr;
|
|
|
|
if (!s) {
|
|
return;
|
|
}
|
|
|
|
if (CHARDEV_GET_CLASS(s)->chr_accept_input) {
|
|
CHARDEV_GET_CLASS(s)->chr_accept_input(s);
|
|
}
|
|
qemu_notify_event();
|
|
}
|
|
|
|
void qemu_chr_fe_printf(CharBackend *be, const char *fmt, ...)
|
|
{
|
|
char buf[CHR_READ_BUF_LEN];
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
vsnprintf(buf, sizeof(buf), fmt, ap);
|
|
/* XXX this blocks entire thread. Rewrite to use
|
|
* qemu_chr_fe_write and background I/O callbacks */
|
|
qemu_chr_fe_write_all(be, (uint8_t *)buf, strlen(buf));
|
|
va_end(ap);
|
|
}
|
|
|
|
Chardev *qemu_chr_fe_get_driver(CharBackend *be)
|
|
{
|
|
/* this is unsafe for the users that support chardev hotswap */
|
|
assert(be->chr_be_change == NULL);
|
|
return be->chr;
|
|
}
|
|
|
|
bool qemu_chr_fe_backend_connected(CharBackend *be)
|
|
{
|
|
return !!be->chr;
|
|
}
|
|
|
|
bool qemu_chr_fe_backend_open(CharBackend *be)
|
|
{
|
|
return be->chr && be->chr->be_open;
|
|
}
|
|
|
|
bool qemu_chr_fe_init(CharBackend *b, Chardev *s, Error **errp)
|
|
{
|
|
int tag = 0;
|
|
|
|
if (s) {
|
|
if (CHARDEV_IS_MUX(s)) {
|
|
MuxChardev *d = MUX_CHARDEV(s);
|
|
|
|
if (d->mux_cnt >= MAX_MUX) {
|
|
goto unavailable;
|
|
}
|
|
|
|
d->backends[d->mux_cnt] = b;
|
|
tag = d->mux_cnt++;
|
|
} else if (s->be) {
|
|
goto unavailable;
|
|
} else {
|
|
s->be = b;
|
|
}
|
|
}
|
|
|
|
b->fe_open = false;
|
|
b->tag = tag;
|
|
b->chr = s;
|
|
return true;
|
|
|
|
unavailable:
|
|
error_setg(errp, QERR_DEVICE_IN_USE, s->label);
|
|
return false;
|
|
}
|
|
|
|
void qemu_chr_fe_deinit(CharBackend *b, bool del)
|
|
{
|
|
assert(b);
|
|
|
|
if (b->chr) {
|
|
qemu_chr_fe_set_handlers(b, NULL, NULL, NULL, NULL, NULL, NULL, true);
|
|
if (b->chr->be == b) {
|
|
b->chr->be = NULL;
|
|
}
|
|
if (CHARDEV_IS_MUX(b->chr)) {
|
|
MuxChardev *d = MUX_CHARDEV(b->chr);
|
|
d->backends[b->tag] = NULL;
|
|
}
|
|
if (del) {
|
|
Object *obj = OBJECT(b->chr);
|
|
if (obj->parent) {
|
|
object_unparent(obj);
|
|
} else {
|
|
object_unref(obj);
|
|
}
|
|
}
|
|
b->chr = NULL;
|
|
}
|
|
}
|
|
|
|
void qemu_chr_fe_set_handlers_full(CharBackend *b,
|
|
IOCanReadHandler *fd_can_read,
|
|
IOReadHandler *fd_read,
|
|
IOEventHandler *fd_event,
|
|
BackendChangeHandler *be_change,
|
|
void *opaque,
|
|
GMainContext *context,
|
|
bool set_open,
|
|
bool sync_state)
|
|
{
|
|
Chardev *s;
|
|
int fe_open;
|
|
|
|
s = b->chr;
|
|
if (!s) {
|
|
return;
|
|
}
|
|
|
|
if (!opaque && !fd_can_read && !fd_read && !fd_event) {
|
|
fe_open = 0;
|
|
remove_fd_in_watch(s);
|
|
} else {
|
|
fe_open = 1;
|
|
}
|
|
b->chr_can_read = fd_can_read;
|
|
b->chr_read = fd_read;
|
|
b->chr_event = fd_event;
|
|
b->chr_be_change = be_change;
|
|
b->opaque = opaque;
|
|
|
|
qemu_chr_be_update_read_handlers(s, context);
|
|
|
|
if (set_open) {
|
|
qemu_chr_fe_set_open(b, fe_open);
|
|
}
|
|
|
|
if (fe_open) {
|
|
qemu_chr_fe_take_focus(b);
|
|
/* We're connecting to an already opened device, so let's make sure we
|
|
also get the open event */
|
|
if (sync_state && s->be_open) {
|
|
qemu_chr_be_event(s, CHR_EVENT_OPENED);
|
|
}
|
|
}
|
|
}
|
|
|
|
void qemu_chr_fe_set_handlers(CharBackend *b,
|
|
IOCanReadHandler *fd_can_read,
|
|
IOReadHandler *fd_read,
|
|
IOEventHandler *fd_event,
|
|
BackendChangeHandler *be_change,
|
|
void *opaque,
|
|
GMainContext *context,
|
|
bool set_open)
|
|
{
|
|
qemu_chr_fe_set_handlers_full(b, fd_can_read, fd_read, fd_event, be_change,
|
|
opaque, context, set_open,
|
|
true);
|
|
}
|
|
|
|
void qemu_chr_fe_take_focus(CharBackend *b)
|
|
{
|
|
if (!b->chr) {
|
|
return;
|
|
}
|
|
|
|
if (CHARDEV_IS_MUX(b->chr)) {
|
|
mux_set_focus(b->chr, b->tag);
|
|
}
|
|
}
|
|
|
|
int qemu_chr_fe_wait_connected(CharBackend *be, Error **errp)
|
|
{
|
|
if (!be->chr) {
|
|
error_setg(errp, "missing associated backend");
|
|
return -1;
|
|
}
|
|
|
|
return qemu_chr_wait_connected(be->chr, errp);
|
|
}
|
|
|
|
void qemu_chr_fe_set_echo(CharBackend *be, bool echo)
|
|
{
|
|
Chardev *chr = be->chr;
|
|
|
|
if (chr && CHARDEV_GET_CLASS(chr)->chr_set_echo) {
|
|
CHARDEV_GET_CLASS(chr)->chr_set_echo(chr, echo);
|
|
}
|
|
}
|
|
|
|
void qemu_chr_fe_set_open(CharBackend *be, int fe_open)
|
|
{
|
|
Chardev *chr = be->chr;
|
|
|
|
if (!chr) {
|
|
return;
|
|
}
|
|
|
|
if (be->fe_open == fe_open) {
|
|
return;
|
|
}
|
|
be->fe_open = fe_open;
|
|
if (CHARDEV_GET_CLASS(chr)->chr_set_fe_open) {
|
|
CHARDEV_GET_CLASS(chr)->chr_set_fe_open(chr, fe_open);
|
|
}
|
|
}
|
|
|
|
guint qemu_chr_fe_add_watch(CharBackend *be, GIOCondition cond,
|
|
FEWatchFunc func, void *user_data)
|
|
{
|
|
Chardev *s = be->chr;
|
|
GSource *src;
|
|
guint tag;
|
|
|
|
if (!s || CHARDEV_GET_CLASS(s)->chr_add_watch == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
src = CHARDEV_GET_CLASS(s)->chr_add_watch(s, cond);
|
|
if (!src) {
|
|
return 0;
|
|
}
|
|
|
|
g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
|
|
tag = g_source_attach(src, s->gcontext);
|
|
g_source_unref(src);
|
|
|
|
return tag;
|
|
}
|
|
|
|
void qemu_chr_fe_disconnect(CharBackend *be)
|
|
{
|
|
Chardev *chr = be->chr;
|
|
|
|
if (chr && CHARDEV_GET_CLASS(chr)->chr_disconnect) {
|
|
CHARDEV_GET_CLASS(chr)->chr_disconnect(chr);
|
|
}
|
|
}
|