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qemu-e2k/qemu-char.c
Paolo Bonzini 5692399f0a backends: Introduce chr-testdev 
From: Paolo Bonzini <pbonzini@redhat.com>

chr-testdev enables a virtio serial channel to be used for guest
initiated qemu exits. hw/misc/debugexit already enables guest
initiated qemu exits, but only for PC targets. chr-testdev supports
any virtio-capable target. kvm-unit-tests/arm is already making use
of this backend.

Currently there is a single command implemented, "q".  It takes a
(prefix) argument for the exit code, thus an exit is implemented by
writing, e.g. "1q", to the virtio-serial port.

It can be used as:
   $QEMU ... \
     -device virtio-serial-device \
     -device virtserialport,chardev=ctd -chardev testdev,id=ctd

or, use:
   $QEMU ... \
     -device virtio-serial-device \
     -device virtconsole,chardev=ctd -chardev testdev,id=ctd

to bind it to virtio-serial port0.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-08-06 17:53:05 +02:00

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/*
* 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-common.h"
#include "monitor/monitor.h"
#include "sysemu/sysemu.h"
#include "qemu/timer.h"
#include "sysemu/char.h"
#include "hw/usb.h"
#include "qmp-commands.h"
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <errno.h>
#include <sys/time.h>
#include <zlib.h>
#ifndef _WIN32
#include <sys/times.h>
#include <sys/wait.h>
#include <termios.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <dirent.h>
#include <netdb.h>
#include <sys/select.h>
#ifdef CONFIG_BSD
#include <sys/stat.h>
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#include <dev/ppbus/ppi.h>
#include <dev/ppbus/ppbconf.h>
#elif defined(__DragonFly__)
#include <dev/misc/ppi/ppi.h>
#include <bus/ppbus/ppbconf.h>
#endif
#else
#ifdef __linux__
#include <linux/ppdev.h>
#include <linux/parport.h>
#endif
#ifdef __sun__
#include <sys/stat.h>
#include <sys/ethernet.h>
#include <sys/sockio.h>
#include <netinet/arp.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h> // must come after ip.h
#include <netinet/udp.h>
#include <netinet/tcp.h>
#endif
#endif
#endif
#include "qemu/sockets.h"
#include "ui/qemu-spice.h"
#define READ_BUF_LEN 4096
#define READ_RETRIES 10
/***********************************************************/
/* character device */
static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
QTAILQ_HEAD_INITIALIZER(chardevs);
CharDriverState *qemu_chr_alloc(void)
{
CharDriverState *chr = g_malloc0(sizeof(CharDriverState));
qemu_mutex_init(&chr->chr_write_lock);
return chr;
}
void qemu_chr_be_event(CharDriverState *s, int event)
{
/* Keep track if the char device is open */
switch (event) {
case CHR_EVENT_OPENED:
s->be_open = 1;
break;
case CHR_EVENT_CLOSED:
s->be_open = 0;
break;
}
if (!s->chr_event)
return;
s->chr_event(s->handler_opaque, event);
}
void qemu_chr_be_generic_open(CharDriverState *s)
{
qemu_chr_be_event(s, CHR_EVENT_OPENED);
}
int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
{
int ret;
qemu_mutex_lock(&s->chr_write_lock);
ret = s->chr_write(s, buf, len);
qemu_mutex_unlock(&s->chr_write_lock);
return ret;
}
int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len)
{
int offset = 0;
int res = 0;
qemu_mutex_lock(&s->chr_write_lock);
while (offset < len) {
do {
res = s->chr_write(s, buf + offset, len - offset);
if (res == -1 && errno == EAGAIN) {
g_usleep(100);
}
} while (res == -1 && errno == EAGAIN);
if (res <= 0) {
break;
}
offset += res;
}
qemu_mutex_unlock(&s->chr_write_lock);
if (res < 0) {
return res;
}
return offset;
}
int qemu_chr_fe_read_all(CharDriverState *s, uint8_t *buf, int len)
{
int offset = 0, counter = 10;
int res;
if (!s->chr_sync_read) {
return 0;
}
while (offset < len) {
do {
res = s->chr_sync_read(s, buf + offset, len - offset);
if (res == -1 && errno == EAGAIN) {
g_usleep(100);
}
} while (res == -1 && errno == EAGAIN);
if (res == 0) {
break;
}
if (res < 0) {
return res;
}
offset += res;
if (!counter--) {
break;
}
}
return offset;
}
int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
{
if (!s->chr_ioctl)
return -ENOTSUP;
return s->chr_ioctl(s, cmd, arg);
}
int qemu_chr_be_can_write(CharDriverState *s)
{
if (!s->chr_can_read)
return 0;
return s->chr_can_read(s->handler_opaque);
}
void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
{
if (s->chr_read) {
s->chr_read(s->handler_opaque, buf, len);
}
}
int qemu_chr_fe_get_msgfd(CharDriverState *s)
{
int fd;
return (qemu_chr_fe_get_msgfds(s, &fd, 1) == 1) ? fd : -1;
}
int qemu_chr_fe_get_msgfds(CharDriverState *s, int *fds, int len)
{
return s->get_msgfds ? s->get_msgfds(s, fds, len) : -1;
}
int qemu_chr_fe_set_msgfds(CharDriverState *s, int *fds, int num)
{
return s->set_msgfds ? s->set_msgfds(s, fds, num) : -1;
}
int qemu_chr_add_client(CharDriverState *s, int fd)
{
return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
}
void qemu_chr_accept_input(CharDriverState *s)
{
if (s->chr_accept_input)
s->chr_accept_input(s);
qemu_notify_event();
}
void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
{
char buf[READ_BUF_LEN];
va_list ap;
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
va_end(ap);
}
static void remove_fd_in_watch(CharDriverState *chr);
void qemu_chr_add_handlers(CharDriverState *s,
IOCanReadHandler *fd_can_read,
IOReadHandler *fd_read,
IOEventHandler *fd_event,
void *opaque)
{
int fe_open;
if (!opaque && !fd_can_read && !fd_read && !fd_event) {
fe_open = 0;
remove_fd_in_watch(s);
} else {
fe_open = 1;
}
s->chr_can_read = fd_can_read;
s->chr_read = fd_read;
s->chr_event = fd_event;
s->handler_opaque = opaque;
if (fe_open && s->chr_update_read_handler)
s->chr_update_read_handler(s);
if (!s->explicit_fe_open) {
qemu_chr_fe_set_open(s, fe_open);
}
/* We're connecting to an already opened device, so let's make sure we
also get the open event */
if (fe_open && s->be_open) {
qemu_chr_be_generic_open(s);
}
}
static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
return len;
}
static CharDriverState *qemu_chr_open_null(void)
{
CharDriverState *chr;
chr = qemu_chr_alloc();
chr->chr_write = null_chr_write;
chr->explicit_be_open = true;
return chr;
}
/* 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)
typedef struct {
IOCanReadHandler *chr_can_read[MAX_MUX];
IOReadHandler *chr_read[MAX_MUX];
IOEventHandler *chr_event[MAX_MUX];
void *ext_opaque[MAX_MUX];
CharDriverState *drv;
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 CharDriverState chr_write_lock. */
int linestart;
int64_t timestamps_start;
} MuxDriver;
/* Called with chr_write_lock held. */
static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
MuxDriver *d = chr->opaque;
int ret;
if (!d->timestamps) {
ret = qemu_chr_fe_write(d->drv, 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));
qemu_chr_fe_write(d->drv, (uint8_t *)buf1, strlen(buf1));
d->linestart = 0;
}
ret += qemu_chr_fe_write(d->drv, 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(CharDriverState *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);
}
qemu_chr_fe_write(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_fe_write(chr, (uint8_t *)ebuf, strlen(ebuf));
else
qemu_chr_fe_write(chr, (uint8_t *)&mux_help[i][j], 1);
}
}
}
static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
{
if (d->chr_event[mux_nr])
d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
}
static int mux_proc_byte(CharDriverState *chr, MuxDriver *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_fe_write(chr, (uint8_t *)term, strlen(term));
exit(0);
break;
}
case 's':
bdrv_commit_all();
break;
case 'b':
qemu_chr_be_event(chr, CHR_EVENT_BREAK);
break;
case 'c':
/* Switch to the next registered device */
mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
d->focus++;
if (d->focus >= d->mux_cnt)
d->focus = 0;
mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
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(CharDriverState *chr)
{
MuxDriver *d = chr->opaque;
int m = d->focus;
while (d->prod[m] != d->cons[m] &&
d->chr_can_read[m] &&
d->chr_can_read[m](d->ext_opaque[m])) {
d->chr_read[m](d->ext_opaque[m],
&d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
}
}
static int mux_chr_can_read(void *opaque)
{
CharDriverState *chr = opaque;
MuxDriver *d = chr->opaque;
int m = d->focus;
if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
return 1;
if (d->chr_can_read[m])
return d->chr_can_read[m](d->ext_opaque[m]);
return 0;
}
static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
{
CharDriverState *chr = opaque;
MuxDriver *d = chr->opaque;
int m = d->focus;
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] &&
d->chr_can_read[m] &&
d->chr_can_read[m](d->ext_opaque[m]))
d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
else
d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
}
}
static void mux_chr_event(void *opaque, int event)
{
CharDriverState *chr = opaque;
MuxDriver *d = chr->opaque;
int i;
/* Send the event to all registered listeners */
for (i = 0; i < d->mux_cnt; i++)
mux_chr_send_event(d, i, event);
}
static void mux_chr_update_read_handler(CharDriverState *chr)
{
MuxDriver *d = chr->opaque;
if (d->mux_cnt >= MAX_MUX) {
fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
return;
}
d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
d->chr_read[d->mux_cnt] = chr->chr_read;
d->chr_event[d->mux_cnt] = chr->chr_event;
/* Fix up the real driver with mux routines */
if (d->mux_cnt == 0) {
qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
mux_chr_event, chr);
}
if (d->focus != -1) {
mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
}
d->focus = d->mux_cnt;
d->mux_cnt++;
mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
}
static bool muxes_realized;
/**
* Called after processing of default and command-line-specified
* chardevs to deliver CHR_EVENT_OPENED events to any FEs attached
* to a mux chardev. This is done here to ensure that
* output/prompts/banners are only displayed for the FE that has
* focus when initial command-line processing/machine init is
* completed.
*
* After this point, any new FE attached to any new or existing
* mux will receive CHR_EVENT_OPENED notifications for the BE
* immediately.
*/
static void muxes_realize_done(Notifier *notifier, void *unused)
{
CharDriverState *chr;
QTAILQ_FOREACH(chr, &chardevs, next) {
if (chr->is_mux) {
MuxDriver *d = chr->opaque;
int i;
/* send OPENED to all already-attached FEs */
for (i = 0; i < d->mux_cnt; i++) {
mux_chr_send_event(d, i, CHR_EVENT_OPENED);
}
/* mark mux as OPENED so any new FEs will immediately receive
* OPENED event
*/
qemu_chr_be_generic_open(chr);
}
}
muxes_realized = true;
}
static Notifier muxes_realize_notify = {
.notify = muxes_realize_done,
};
static GSource *mux_chr_add_watch(CharDriverState *s, GIOCondition cond)
{
MuxDriver *d = s->opaque;
return d->drv->chr_add_watch(d->drv, cond);
}
static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
{
CharDriverState *chr;
MuxDriver *d;
chr = qemu_chr_alloc();
d = g_malloc0(sizeof(MuxDriver));
chr->opaque = d;
d->drv = drv;
d->focus = -1;
chr->chr_write = mux_chr_write;
chr->chr_update_read_handler = mux_chr_update_read_handler;
chr->chr_accept_input = mux_chr_accept_input;
/* Frontend guest-open / -close notification is not support with muxes */
chr->chr_set_fe_open = NULL;
if (drv->chr_add_watch) {
chr->chr_add_watch = mux_chr_add_watch;
}
/* only default to opened state if we've realized the initial
* set of muxes
*/
chr->explicit_be_open = muxes_realized ? 0 : 1;
chr->is_mux = 1;
return chr;
}
#ifdef _WIN32
int send_all(int fd, const void *buf, int len1)
{
int ret, len;
len = len1;
while (len > 0) {
ret = send(fd, buf, len, 0);
if (ret < 0) {
errno = WSAGetLastError();
if (errno != WSAEWOULDBLOCK) {
return -1;
}
} else if (ret == 0) {
break;
} else {
buf += ret;
len -= ret;
}
}
return len1 - len;
}
#else
int send_all(int fd, const void *_buf, int len1)
{
int ret, len;
const uint8_t *buf = _buf;
len = len1;
while (len > 0) {
ret = write(fd, buf, len);
if (ret < 0) {
if (errno != EINTR && errno != EAGAIN)
return -1;
} else if (ret == 0) {
break;
} else {
buf += ret;
len -= ret;
}
}
return len1 - len;
}
int recv_all(int fd, void *_buf, int len1, bool single_read)
{
int ret, len;
uint8_t *buf = _buf;
len = len1;
while ((len > 0) && (ret = read(fd, buf, len)) != 0) {
if (ret < 0) {
if (errno != EINTR && errno != EAGAIN) {
return -1;
}
continue;
} else {
if (single_read) {
return ret;
}
buf += ret;
len -= ret;
}
}
return len1 - len;
}
#endif /* !_WIN32 */
typedef struct IOWatchPoll
{
GSource parent;
GIOChannel *channel;
GSource *src;
IOCanReadHandler *fd_can_read;
GSourceFunc fd_read;
void *opaque;
} IOWatchPoll;
static IOWatchPoll *io_watch_poll_from_source(GSource *source)
{
return container_of(source, IOWatchPoll, parent);
}
static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_)
{
IOWatchPoll *iwp = io_watch_poll_from_source(source);
bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
bool was_active = iwp->src != NULL;
if (was_active == now_active) {
return FALSE;
}
if (now_active) {
iwp->src = g_io_create_watch(iwp->channel, G_IO_IN | G_IO_ERR | G_IO_HUP);
g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
g_source_attach(iwp->src, NULL);
} else {
g_source_destroy(iwp->src);
g_source_unref(iwp->src);
iwp->src = NULL;
}
return FALSE;
}
static gboolean io_watch_poll_check(GSource *source)
{
return FALSE;
}
static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
gpointer user_data)
{
abort();
}
static void io_watch_poll_finalize(GSource *source)
{
/* Due to a glib bug, removing the last reference to a source
* inside a finalize callback causes recursive locking (and a
* deadlock). This is not a problem inside other callbacks,
* including dispatch callbacks, so we call io_remove_watch_poll
* to remove this source. At this point, iwp->src must
* be NULL, or we would leak it.
*
* This would be solved much more elegantly by child sources,
* but we support older glib versions that do not have them.
*/
IOWatchPoll *iwp = io_watch_poll_from_source(source);
assert(iwp->src == NULL);
}
static GSourceFuncs io_watch_poll_funcs = {
.prepare = io_watch_poll_prepare,
.check = io_watch_poll_check,
.dispatch = io_watch_poll_dispatch,
.finalize = io_watch_poll_finalize,
};
/* Can only be used for read */
static guint io_add_watch_poll(GIOChannel *channel,
IOCanReadHandler *fd_can_read,
GIOFunc fd_read,
gpointer user_data)
{
IOWatchPoll *iwp;
int tag;
iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll));
iwp->fd_can_read = fd_can_read;
iwp->opaque = user_data;
iwp->channel = channel;
iwp->fd_read = (GSourceFunc) fd_read;
iwp->src = NULL;
tag = g_source_attach(&iwp->parent, NULL);
g_source_unref(&iwp->parent);
return tag;
}
static void io_remove_watch_poll(guint tag)
{
GSource *source;
IOWatchPoll *iwp;
g_return_if_fail (tag > 0);
source = g_main_context_find_source_by_id(NULL, tag);
g_return_if_fail (source != NULL);
iwp = io_watch_poll_from_source(source);
if (iwp->src) {
g_source_destroy(iwp->src);
g_source_unref(iwp->src);
iwp->src = NULL;
}
g_source_destroy(&iwp->parent);
}
static void remove_fd_in_watch(CharDriverState *chr)
{
if (chr->fd_in_tag) {
io_remove_watch_poll(chr->fd_in_tag);
chr->fd_in_tag = 0;
}
}
#ifndef _WIN32
static GIOChannel *io_channel_from_fd(int fd)
{
GIOChannel *chan;
if (fd == -1) {
return NULL;
}
chan = g_io_channel_unix_new(fd);
g_io_channel_set_encoding(chan, NULL, NULL);
g_io_channel_set_buffered(chan, FALSE);
return chan;
}
#endif
static GIOChannel *io_channel_from_socket(int fd)
{
GIOChannel *chan;
if (fd == -1) {
return NULL;
}
#ifdef _WIN32
chan = g_io_channel_win32_new_socket(fd);
#else
chan = g_io_channel_unix_new(fd);
#endif
g_io_channel_set_encoding(chan, NULL, NULL);
g_io_channel_set_buffered(chan, FALSE);
return chan;
}
static int io_channel_send(GIOChannel *fd, const void *buf, size_t len)
{
size_t offset = 0;
GIOStatus status = G_IO_STATUS_NORMAL;
while (offset < len && status == G_IO_STATUS_NORMAL) {
gsize bytes_written = 0;
status = g_io_channel_write_chars(fd, buf + offset, len - offset,
&bytes_written, NULL);
offset += bytes_written;
}
if (offset > 0) {
return offset;
}
switch (status) {
case G_IO_STATUS_NORMAL:
g_assert(len == 0);
return 0;
case G_IO_STATUS_AGAIN:
errno = EAGAIN;
return -1;
default:
break;
}
errno = EINVAL;
return -1;
}
#ifndef _WIN32
typedef struct FDCharDriver {
CharDriverState *chr;
GIOChannel *fd_in, *fd_out;
int max_size;
QTAILQ_ENTRY(FDCharDriver) node;
} FDCharDriver;
/* Called with chr_write_lock held. */
static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
FDCharDriver *s = chr->opaque;
return io_channel_send(s->fd_out, buf, len);
}
static gboolean fd_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
{
CharDriverState *chr = opaque;
FDCharDriver *s = chr->opaque;
int len;
uint8_t buf[READ_BUF_LEN];
GIOStatus status;
gsize bytes_read;
len = sizeof(buf);
if (len > s->max_size) {
len = s->max_size;
}
if (len == 0) {
return TRUE;
}
status = g_io_channel_read_chars(chan, (gchar *)buf,
len, &bytes_read, NULL);
if (status == G_IO_STATUS_EOF) {
remove_fd_in_watch(chr);
qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
return FALSE;
}
if (status == G_IO_STATUS_NORMAL) {
qemu_chr_be_write(chr, buf, bytes_read);
}
return TRUE;
}
static int fd_chr_read_poll(void *opaque)
{
CharDriverState *chr = opaque;
FDCharDriver *s = chr->opaque;
s->max_size = qemu_chr_be_can_write(chr);
return s->max_size;
}
static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
{
FDCharDriver *s = chr->opaque;
return g_io_create_watch(s->fd_out, cond);
}
static void fd_chr_update_read_handler(CharDriverState *chr)
{
FDCharDriver *s = chr->opaque;
remove_fd_in_watch(chr);
if (s->fd_in) {
chr->fd_in_tag = io_add_watch_poll(s->fd_in, fd_chr_read_poll,
fd_chr_read, chr);
}
}
static void fd_chr_close(struct CharDriverState *chr)
{
FDCharDriver *s = chr->opaque;
remove_fd_in_watch(chr);
if (s->fd_in) {
g_io_channel_unref(s->fd_in);
}
if (s->fd_out) {
g_io_channel_unref(s->fd_out);
}
g_free(s);
qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
}
/* open a character device to a unix fd */
static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
{
CharDriverState *chr;
FDCharDriver *s;
chr = qemu_chr_alloc();
s = g_malloc0(sizeof(FDCharDriver));
s->fd_in = io_channel_from_fd(fd_in);
s->fd_out = io_channel_from_fd(fd_out);
fcntl(fd_out, F_SETFL, O_NONBLOCK);
s->chr = chr;
chr->opaque = s;
chr->chr_add_watch = fd_chr_add_watch;
chr->chr_write = fd_chr_write;
chr->chr_update_read_handler = fd_chr_update_read_handler;
chr->chr_close = fd_chr_close;
return chr;
}
static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
{
int fd_in, fd_out;
char filename_in[256], filename_out[256];
const char *filename = opts->device;
if (filename == NULL) {
fprintf(stderr, "chardev: pipe: no filename given\n");
return NULL;
}
snprintf(filename_in, 256, "%s.in", filename);
snprintf(filename_out, 256, "%s.out", filename);
TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
if (fd_in < 0 || fd_out < 0) {
if (fd_in >= 0)
close(fd_in);
if (fd_out >= 0)
close(fd_out);
TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
if (fd_in < 0) {
return NULL;
}
}
return qemu_chr_open_fd(fd_in, fd_out);
}
/* init terminal so that we can grab keys */
static struct termios oldtty;
static int old_fd0_flags;
static bool stdio_allow_signal;
static void term_exit(void)
{
tcsetattr (0, TCSANOW, &oldtty);
fcntl(0, F_SETFL, old_fd0_flags);
}
static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
{
struct termios tty;
tty = oldtty;
if (!echo) {
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
|INLCR|IGNCR|ICRNL|IXON);
tty.c_oflag |= OPOST;
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
tty.c_cflag &= ~(CSIZE|PARENB);
tty.c_cflag |= CS8;
tty.c_cc[VMIN] = 1;
tty.c_cc[VTIME] = 0;
}
if (!stdio_allow_signal)
tty.c_lflag &= ~ISIG;
tcsetattr (0, TCSANOW, &tty);
}
static void qemu_chr_close_stdio(struct CharDriverState *chr)
{
term_exit();
fd_chr_close(chr);
}
static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
{
CharDriverState *chr;
if (is_daemonized()) {
error_report("cannot use stdio with -daemonize");
return NULL;
}
old_fd0_flags = fcntl(0, F_GETFL);
tcgetattr (0, &oldtty);
fcntl(0, F_SETFL, O_NONBLOCK);
atexit(term_exit);
chr = qemu_chr_open_fd(0, 1);
chr->chr_close = qemu_chr_close_stdio;
chr->chr_set_echo = qemu_chr_set_echo_stdio;
if (opts->has_signal) {
stdio_allow_signal = opts->signal;
}
qemu_chr_fe_set_echo(chr, false);
return chr;
}
#if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
|| defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
|| defined(__GLIBC__)
#define HAVE_CHARDEV_TTY 1
typedef struct {
GIOChannel *fd;
int read_bytes;
/* Protected by the CharDriverState chr_write_lock. */
int connected;
guint timer_tag;
guint open_tag;
} PtyCharDriver;
static void pty_chr_update_read_handler_locked(CharDriverState *chr);
static void pty_chr_state(CharDriverState *chr, int connected);
static gboolean pty_chr_timer(gpointer opaque)
{
struct CharDriverState *chr = opaque;
PtyCharDriver *s = chr->opaque;
qemu_mutex_lock(&chr->chr_write_lock);
s->timer_tag = 0;
s->open_tag = 0;
if (!s->connected) {
/* Next poll ... */
pty_chr_update_read_handler_locked(chr);
}
qemu_mutex_unlock(&chr->chr_write_lock);
return FALSE;
}
/* Called with chr_write_lock held. */
static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
{
PtyCharDriver *s = chr->opaque;
if (s->timer_tag) {
g_source_remove(s->timer_tag);
s->timer_tag = 0;
}
if (ms == 1000) {
s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
} else {
s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
}
}
/* Called with chr_write_lock held. */
static void pty_chr_update_read_handler_locked(CharDriverState *chr)
{
PtyCharDriver *s = chr->opaque;
GPollFD pfd;
pfd.fd = g_io_channel_unix_get_fd(s->fd);
pfd.events = G_IO_OUT;
pfd.revents = 0;
g_poll(&pfd, 1, 0);
if (pfd.revents & G_IO_HUP) {
pty_chr_state(chr, 0);
} else {
pty_chr_state(chr, 1);
}
}
static void pty_chr_update_read_handler(CharDriverState *chr)
{
qemu_mutex_lock(&chr->chr_write_lock);
pty_chr_update_read_handler_locked(chr);
qemu_mutex_unlock(&chr->chr_write_lock);
}
/* Called with chr_write_lock held. */
static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
PtyCharDriver *s = chr->opaque;
if (!s->connected) {
/* guest sends data, check for (re-)connect */
pty_chr_update_read_handler_locked(chr);
return 0;
}
return io_channel_send(s->fd, buf, len);
}
static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
{
PtyCharDriver *s = chr->opaque;
if (!s->connected) {
return NULL;
}
return g_io_create_watch(s->fd, cond);
}
static int pty_chr_read_poll(void *opaque)
{
CharDriverState *chr = opaque;
PtyCharDriver *s = chr->opaque;
s->read_bytes = qemu_chr_be_can_write(chr);
return s->read_bytes;
}
static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
{
CharDriverState *chr = opaque;
PtyCharDriver *s = chr->opaque;
gsize size, len;
uint8_t buf[READ_BUF_LEN];
GIOStatus status;
len = sizeof(buf);
if (len > s->read_bytes)
len = s->read_bytes;
if (len == 0) {
return TRUE;
}
status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
if (status != G_IO_STATUS_NORMAL) {
pty_chr_state(chr, 0);
return FALSE;
} else {
pty_chr_state(chr, 1);
qemu_chr_be_write(chr, buf, size);
}
return TRUE;
}
static gboolean qemu_chr_be_generic_open_func(gpointer opaque)
{
CharDriverState *chr = opaque;
PtyCharDriver *s = chr->opaque;
s->open_tag = 0;
qemu_chr_be_generic_open(chr);
return FALSE;
}
/* Called with chr_write_lock held. */
static void pty_chr_state(CharDriverState *chr, int connected)
{
PtyCharDriver *s = chr->opaque;
if (!connected) {
if (s->open_tag) {
g_source_remove(s->open_tag);
s->open_tag = 0;
}
remove_fd_in_watch(chr);
s->connected = 0;
/* (re-)connect poll interval for idle guests: once per second.
* We check more frequently in case the guests sends data to
* the virtual device linked to our pty. */
pty_chr_rearm_timer(chr, 1000);
} else {
if (s->timer_tag) {
g_source_remove(s->timer_tag);
s->timer_tag = 0;
}
if (!s->connected) {
g_assert(s->open_tag == 0);
s->connected = 1;
s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, chr);
}
if (!chr->fd_in_tag) {
chr->fd_in_tag = io_add_watch_poll(s->fd, pty_chr_read_poll,
pty_chr_read, chr);
}
}
}
static void pty_chr_close(struct CharDriverState *chr)
{
PtyCharDriver *s = chr->opaque;
int fd;
qemu_mutex_lock(&chr->chr_write_lock);
pty_chr_state(chr, 0);
fd = g_io_channel_unix_get_fd(s->fd);
g_io_channel_unref(s->fd);
close(fd);
if (s->timer_tag) {
g_source_remove(s->timer_tag);
s->timer_tag = 0;
}
qemu_mutex_unlock(&chr->chr_write_lock);
g_free(s);
qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
}
static CharDriverState *qemu_chr_open_pty(const char *id,
ChardevReturn *ret)
{
CharDriverState *chr;
PtyCharDriver *s;
int master_fd, slave_fd;
char pty_name[PATH_MAX];
master_fd = qemu_openpty_raw(&slave_fd, pty_name);
if (master_fd < 0) {
return NULL;
}
close(slave_fd);
chr = qemu_chr_alloc();
chr->filename = g_strdup_printf("pty:%s", pty_name);
ret->pty = g_strdup(pty_name);
ret->has_pty = true;
fprintf(stderr, "char device redirected to %s (label %s)\n",
pty_name, id);
s = g_malloc0(sizeof(PtyCharDriver));
chr->opaque = s;
chr->chr_write = pty_chr_write;
chr->chr_update_read_handler = pty_chr_update_read_handler;
chr->chr_close = pty_chr_close;
chr->chr_add_watch = pty_chr_add_watch;
chr->explicit_be_open = true;
s->fd = io_channel_from_fd(master_fd);
s->timer_tag = 0;
return chr;
}
static void tty_serial_init(int fd, int speed,
int parity, int data_bits, int stop_bits)
{
struct termios tty;
speed_t spd;
#if 0
printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
speed, parity, data_bits, stop_bits);
#endif
tcgetattr (fd, &tty);
#define check_speed(val) if (speed <= val) { spd = B##val; break; }
speed = speed * 10 / 11;
do {
check_speed(50);
check_speed(75);
check_speed(110);
check_speed(134);
check_speed(150);
check_speed(200);
check_speed(300);
check_speed(600);
check_speed(1200);
check_speed(1800);
check_speed(2400);
check_speed(4800);
check_speed(9600);
check_speed(19200);
check_speed(38400);
/* Non-Posix values follow. They may be unsupported on some systems. */
check_speed(57600);
check_speed(115200);
#ifdef B230400
check_speed(230400);
#endif
#ifdef B460800
check_speed(460800);
#endif
#ifdef B500000
check_speed(500000);
#endif
#ifdef B576000
check_speed(576000);
#endif
#ifdef B921600
check_speed(921600);
#endif
#ifdef B1000000
check_speed(1000000);
#endif
#ifdef B1152000
check_speed(1152000);
#endif
#ifdef B1500000
check_speed(1500000);
#endif
#ifdef B2000000
check_speed(2000000);
#endif
#ifdef B2500000
check_speed(2500000);
#endif
#ifdef B3000000
check_speed(3000000);
#endif
#ifdef B3500000
check_speed(3500000);
#endif
#ifdef B4000000
check_speed(4000000);
#endif
spd = B115200;
} while (0);
cfsetispeed(&tty, spd);
cfsetospeed(&tty, spd);
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
|INLCR|IGNCR|ICRNL|IXON);
tty.c_oflag |= OPOST;
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
switch(data_bits) {
default:
case 8:
tty.c_cflag |= CS8;
break;
case 7:
tty.c_cflag |= CS7;
break;
case 6:
tty.c_cflag |= CS6;
break;
case 5:
tty.c_cflag |= CS5;
break;
}
switch(parity) {
default:
case 'N':
break;
case 'E':
tty.c_cflag |= PARENB;
break;
case 'O':
tty.c_cflag |= PARENB | PARODD;
break;
}
if (stop_bits == 2)
tty.c_cflag |= CSTOPB;
tcsetattr (fd, TCSANOW, &tty);
}
static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
{
FDCharDriver *s = chr->opaque;
switch(cmd) {
case CHR_IOCTL_SERIAL_SET_PARAMS:
{
QEMUSerialSetParams *ssp = arg;
tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
ssp->speed, ssp->parity,
ssp->data_bits, ssp->stop_bits);
}
break;
case CHR_IOCTL_SERIAL_SET_BREAK:
{
int enable = *(int *)arg;
if (enable) {
tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
}
}
break;
case CHR_IOCTL_SERIAL_GET_TIOCM:
{
int sarg = 0;
int *targ = (int *)arg;
ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
*targ = 0;
if (sarg & TIOCM_CTS)
*targ |= CHR_TIOCM_CTS;
if (sarg & TIOCM_CAR)
*targ |= CHR_TIOCM_CAR;
if (sarg & TIOCM_DSR)
*targ |= CHR_TIOCM_DSR;
if (sarg & TIOCM_RI)
*targ |= CHR_TIOCM_RI;
if (sarg & TIOCM_DTR)
*targ |= CHR_TIOCM_DTR;
if (sarg & TIOCM_RTS)
*targ |= CHR_TIOCM_RTS;
}
break;
case CHR_IOCTL_SERIAL_SET_TIOCM:
{
int sarg = *(int *)arg;
int targ = 0;
ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
| CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
if (sarg & CHR_TIOCM_CTS)
targ |= TIOCM_CTS;
if (sarg & CHR_TIOCM_CAR)
targ |= TIOCM_CAR;
if (sarg & CHR_TIOCM_DSR)
targ |= TIOCM_DSR;
if (sarg & CHR_TIOCM_RI)
targ |= TIOCM_RI;
if (sarg & CHR_TIOCM_DTR)
targ |= TIOCM_DTR;
if (sarg & CHR_TIOCM_RTS)
targ |= TIOCM_RTS;
ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
}
break;
default:
return -ENOTSUP;
}
return 0;
}
static void qemu_chr_close_tty(CharDriverState *chr)
{
FDCharDriver *s = chr->opaque;
int fd = -1;
if (s) {
fd = g_io_channel_unix_get_fd(s->fd_in);
}
fd_chr_close(chr);
if (fd >= 0) {
close(fd);
}
}
static CharDriverState *qemu_chr_open_tty_fd(int fd)
{
CharDriverState *chr;
tty_serial_init(fd, 115200, 'N', 8, 1);
chr = qemu_chr_open_fd(fd, fd);
chr->chr_ioctl = tty_serial_ioctl;
chr->chr_close = qemu_chr_close_tty;
return chr;
}
#endif /* __linux__ || __sun__ */
#if defined(__linux__)
#define HAVE_CHARDEV_PARPORT 1
typedef struct {
int fd;
int mode;
} ParallelCharDriver;
static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
{
if (s->mode != mode) {
int m = mode;
if (ioctl(s->fd, PPSETMODE, &m) < 0)
return 0;
s->mode = mode;
}
return 1;
}
static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
{
ParallelCharDriver *drv = chr->opaque;
int fd = drv->fd;
uint8_t b;
switch(cmd) {
case CHR_IOCTL_PP_READ_DATA:
if (ioctl(fd, PPRDATA, &b) < 0)
return -ENOTSUP;
*(uint8_t *)arg = b;
break;
case CHR_IOCTL_PP_WRITE_DATA:
b = *(uint8_t *)arg;
if (ioctl(fd, PPWDATA, &b) < 0)
return -ENOTSUP;
break;
case CHR_IOCTL_PP_READ_CONTROL:
if (ioctl(fd, PPRCONTROL, &b) < 0)
return -ENOTSUP;
/* Linux gives only the lowest bits, and no way to know data
direction! For better compatibility set the fixed upper
bits. */
*(uint8_t *)arg = b | 0xc0;
break;
case CHR_IOCTL_PP_WRITE_CONTROL:
b = *(uint8_t *)arg;
if (ioctl(fd, PPWCONTROL, &b) < 0)
return -ENOTSUP;
break;
case CHR_IOCTL_PP_READ_STATUS:
if (ioctl(fd, PPRSTATUS, &b) < 0)
return -ENOTSUP;
*(uint8_t *)arg = b;
break;
case CHR_IOCTL_PP_DATA_DIR:
if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
return -ENOTSUP;
break;
case CHR_IOCTL_PP_EPP_READ_ADDR:
if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
struct ParallelIOArg *parg = arg;
int n = read(fd, parg->buffer, parg->count);
if (n != parg->count) {
return -EIO;
}
}
break;
case CHR_IOCTL_PP_EPP_READ:
if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
struct ParallelIOArg *parg = arg;
int n = read(fd, parg->buffer, parg->count);
if (n != parg->count) {
return -EIO;
}
}
break;
case CHR_IOCTL_PP_EPP_WRITE_ADDR:
if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
struct ParallelIOArg *parg = arg;
int n = write(fd, parg->buffer, parg->count);
if (n != parg->count) {
return -EIO;
}
}
break;
case CHR_IOCTL_PP_EPP_WRITE:
if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
struct ParallelIOArg *parg = arg;
int n = write(fd, parg->buffer, parg->count);
if (n != parg->count) {
return -EIO;
}
}
break;
default:
return -ENOTSUP;
}
return 0;
}
static void pp_close(CharDriverState *chr)
{
ParallelCharDriver *drv = chr->opaque;
int fd = drv->fd;
pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
ioctl(fd, PPRELEASE);
close(fd);
g_free(drv);
qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
}
static CharDriverState *qemu_chr_open_pp_fd(int fd)
{
CharDriverState *chr;
ParallelCharDriver *drv;
if (ioctl(fd, PPCLAIM) < 0) {
close(fd);
return NULL;
}
drv = g_malloc0(sizeof(ParallelCharDriver));
drv->fd = fd;
drv->mode = IEEE1284_MODE_COMPAT;
chr = qemu_chr_alloc();
chr->chr_write = null_chr_write;
chr->chr_ioctl = pp_ioctl;
chr->chr_close = pp_close;
chr->opaque = drv;
return chr;
}
#endif /* __linux__ */
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
#define HAVE_CHARDEV_PARPORT 1
static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
{
int fd = (int)(intptr_t)chr->opaque;
uint8_t b;
switch(cmd) {
case CHR_IOCTL_PP_READ_DATA:
if (ioctl(fd, PPIGDATA, &b) < 0)
return -ENOTSUP;
*(uint8_t *)arg = b;
break;
case CHR_IOCTL_PP_WRITE_DATA:
b = *(uint8_t *)arg;
if (ioctl(fd, PPISDATA, &b) < 0)
return -ENOTSUP;
break;
case CHR_IOCTL_PP_READ_CONTROL:
if (ioctl(fd, PPIGCTRL, &b) < 0)
return -ENOTSUP;
*(uint8_t *)arg = b;
break;
case CHR_IOCTL_PP_WRITE_CONTROL:
b = *(uint8_t *)arg;
if (ioctl(fd, PPISCTRL, &b) < 0)
return -ENOTSUP;
break;
case CHR_IOCTL_PP_READ_STATUS:
if (ioctl(fd, PPIGSTATUS, &b) < 0)
return -ENOTSUP;
*(uint8_t *)arg = b;
break;
default:
return -ENOTSUP;
}
return 0;
}
static CharDriverState *qemu_chr_open_pp_fd(int fd)
{
CharDriverState *chr;
chr = qemu_chr_alloc();
chr->opaque = (void *)(intptr_t)fd;
chr->chr_write = null_chr_write;
chr->chr_ioctl = pp_ioctl;
chr->explicit_be_open = true;
return chr;
}
#endif
#else /* _WIN32 */
typedef struct {
int max_size;
HANDLE hcom, hrecv, hsend;
OVERLAPPED orecv;
BOOL fpipe;
DWORD len;
/* Protected by the CharDriverState chr_write_lock. */
OVERLAPPED osend;
} WinCharState;
typedef struct {
HANDLE hStdIn;
HANDLE hInputReadyEvent;
HANDLE hInputDoneEvent;
HANDLE hInputThread;
uint8_t win_stdio_buf;
} WinStdioCharState;
#define NSENDBUF 2048
#define NRECVBUF 2048
#define MAXCONNECT 1
#define NTIMEOUT 5000
static int win_chr_poll(void *opaque);
static int win_chr_pipe_poll(void *opaque);
static void win_chr_close(CharDriverState *chr)
{
WinCharState *s = chr->opaque;
if (s->hsend) {
CloseHandle(s->hsend);
s->hsend = NULL;
}
if (s->hrecv) {
CloseHandle(s->hrecv);
s->hrecv = NULL;
}
if (s->hcom) {
CloseHandle(s->hcom);
s->hcom = NULL;
}
if (s->fpipe)
qemu_del_polling_cb(win_chr_pipe_poll, chr);
else
qemu_del_polling_cb(win_chr_poll, chr);
qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
}
static int win_chr_init(CharDriverState *chr, const char *filename)
{
WinCharState *s = chr->opaque;
COMMCONFIG comcfg;
COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
COMSTAT comstat;
DWORD size;
DWORD err;
s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
if (!s->hsend) {
fprintf(stderr, "Failed CreateEvent\n");
goto fail;
}
s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
if (!s->hrecv) {
fprintf(stderr, "Failed CreateEvent\n");
goto fail;
}
s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
if (s->hcom == INVALID_HANDLE_VALUE) {
fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
s->hcom = NULL;
goto fail;
}
if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
fprintf(stderr, "Failed SetupComm\n");
goto fail;
}
ZeroMemory(&comcfg, sizeof(COMMCONFIG));
size = sizeof(COMMCONFIG);
GetDefaultCommConfig(filename, &comcfg, &size);
comcfg.dcb.DCBlength = sizeof(DCB);
CommConfigDialog(filename, NULL, &comcfg);
if (!SetCommState(s->hcom, &comcfg.dcb)) {
fprintf(stderr, "Failed SetCommState\n");
goto fail;
}
if (!SetCommMask(s->hcom, EV_ERR)) {
fprintf(stderr, "Failed SetCommMask\n");
goto fail;
}
cto.ReadIntervalTimeout = MAXDWORD;
if (!SetCommTimeouts(s->hcom, &cto)) {
fprintf(stderr, "Failed SetCommTimeouts\n");
goto fail;
}
if (!ClearCommError(s->hcom, &err, &comstat)) {
fprintf(stderr, "Failed ClearCommError\n");
goto fail;
}
qemu_add_polling_cb(win_chr_poll, chr);
return 0;
fail:
win_chr_close(chr);
return -1;
}
/* Called with chr_write_lock held. */
static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
{
WinCharState *s = chr->opaque;
DWORD len, ret, size, err;
len = len1;
ZeroMemory(&s->osend, sizeof(s->osend));
s->osend.hEvent = s->hsend;
while (len > 0) {
if (s->hsend)
ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
else
ret = WriteFile(s->hcom, buf, len, &size, NULL);
if (!ret) {
err = GetLastError();
if (err == ERROR_IO_PENDING) {
ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
if (ret) {
buf += size;
len -= size;
} else {
break;
}
} else {
break;
}
} else {
buf += size;
len -= size;
}
}
return len1 - len;
}
static int win_chr_read_poll(CharDriverState *chr)
{
WinCharState *s = chr->opaque;
s->max_size = qemu_chr_be_can_write(chr);
return s->max_size;
}
static void win_chr_readfile(CharDriverState *chr)
{
WinCharState *s = chr->opaque;
int ret, err;
uint8_t buf[READ_BUF_LEN];
DWORD size;
ZeroMemory(&s->orecv, sizeof(s->orecv));
s->orecv.hEvent = s->hrecv;
ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
if (!ret) {
err = GetLastError();
if (err == ERROR_IO_PENDING) {
ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
}
}
if (size > 0) {
qemu_chr_be_write(chr, buf, size);
}
}
static void win_chr_read(CharDriverState *chr)
{
WinCharState *s = chr->opaque;
if (s->len > s->max_size)
s->len = s->max_size;
if (s->len == 0)
return;
win_chr_readfile(chr);
}
static int win_chr_poll(void *opaque)
{
CharDriverState *chr = opaque;
WinCharState *s = chr->opaque;
COMSTAT status;
DWORD comerr;
ClearCommError(s->hcom, &comerr, &status);
if (status.cbInQue > 0) {
s->len = status.cbInQue;
win_chr_read_poll(chr);
win_chr_read(chr);
return 1;
}
return 0;
}
static CharDriverState *qemu_chr_open_win_path(const char *filename)
{
CharDriverState *chr;
WinCharState *s;
chr = qemu_chr_alloc();
s = g_malloc0(sizeof(WinCharState));
chr->opaque = s;
chr->chr_write = win_chr_write;
chr->chr_close = win_chr_close;
if (win_chr_init(chr, filename) < 0) {
g_free(s);
g_free(chr);
return NULL;
}
return chr;
}
static int win_chr_pipe_poll(void *opaque)
{
CharDriverState *chr = opaque;
WinCharState *s = chr->opaque;
DWORD size;
PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
if (size > 0) {
s->len = size;
win_chr_read_poll(chr);
win_chr_read(chr);
return 1;
}
return 0;
}
static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
{
WinCharState *s = chr->opaque;
OVERLAPPED ov;
int ret;
DWORD size;
char openname[256];
s->fpipe = TRUE;
s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
if (!s->hsend) {
fprintf(stderr, "Failed CreateEvent\n");
goto fail;
}
s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
if (!s->hrecv) {
fprintf(stderr, "Failed CreateEvent\n");
goto fail;
}
snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
PIPE_WAIT,
MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
if (s->hcom == INVALID_HANDLE_VALUE) {
fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
s->hcom = NULL;
goto fail;
}
ZeroMemory(&ov, sizeof(ov));
ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
ret = ConnectNamedPipe(s->hcom, &ov);
if (ret) {
fprintf(stderr, "Failed ConnectNamedPipe\n");
goto fail;
}
ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
if (!ret) {
fprintf(stderr, "Failed GetOverlappedResult\n");
if (ov.hEvent) {
CloseHandle(ov.hEvent);
ov.hEvent = NULL;
}
goto fail;
}
if (ov.hEvent) {
CloseHandle(ov.hEvent);
ov.hEvent = NULL;
}
qemu_add_polling_cb(win_chr_pipe_poll, chr);
return 0;
fail:
win_chr_close(chr);
return -1;
}
static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
{
const char *filename = opts->device;
CharDriverState *chr;
WinCharState *s;
chr = qemu_chr_alloc();
s = g_malloc0(sizeof(WinCharState));
chr->opaque = s;
chr->chr_write = win_chr_write;
chr->chr_close = win_chr_close;
if (win_chr_pipe_init(chr, filename) < 0) {
g_free(s);
g_free(chr);
return NULL;
}
return chr;
}
static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
{
CharDriverState *chr;
WinCharState *s;
chr = qemu_chr_alloc();
s = g_malloc0(sizeof(WinCharState));
s->hcom = fd_out;
chr->opaque = s;
chr->chr_write = win_chr_write;
return chr;
}
static CharDriverState *qemu_chr_open_win_con(void)
{
return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
}
static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
{
HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
DWORD dwSize;
int len1;
len1 = len;
while (len1 > 0) {
if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
break;
}
buf += dwSize;
len1 -= dwSize;
}
return len - len1;
}
static void win_stdio_wait_func(void *opaque)
{
CharDriverState *chr = opaque;
WinStdioCharState *stdio = chr->opaque;
INPUT_RECORD buf[4];
int ret;
DWORD dwSize;
int i;
ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize);
if (!ret) {
/* Avoid error storm */
qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
return;
}
for (i = 0; i < dwSize; i++) {
KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
int j;
if (kev->uChar.AsciiChar != 0) {
for (j = 0; j < kev->wRepeatCount; j++) {
if (qemu_chr_be_can_write(chr)) {
uint8_t c = kev->uChar.AsciiChar;
qemu_chr_be_write(chr, &c, 1);
}
}
}
}
}
}
static DWORD WINAPI win_stdio_thread(LPVOID param)
{
CharDriverState *chr = param;
WinStdioCharState *stdio = chr->opaque;
int ret;
DWORD dwSize;
while (1) {
/* Wait for one byte */
ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
/* Exit in case of error, continue if nothing read */
if (!ret) {
break;
}
if (!dwSize) {
continue;
}
/* Some terminal emulator returns \r\n for Enter, just pass \n */
if (stdio->win_stdio_buf == '\r') {
continue;
}
/* Signal the main thread and wait until the byte was eaten */
if (!SetEvent(stdio->hInputReadyEvent)) {
break;
}
if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
!= WAIT_OBJECT_0) {
break;
}
}
qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
return 0;
}
static void win_stdio_thread_wait_func(void *opaque)
{
CharDriverState *chr = opaque;
WinStdioCharState *stdio = chr->opaque;
if (qemu_chr_be_can_write(chr)) {
qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
}
SetEvent(stdio->hInputDoneEvent);
}
static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
{
WinStdioCharState *stdio = chr->opaque;
DWORD dwMode = 0;
GetConsoleMode(stdio->hStdIn, &dwMode);
if (echo) {
SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
} else {
SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
}
}
static void win_stdio_close(CharDriverState *chr)
{
WinStdioCharState *stdio = chr->opaque;
if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
CloseHandle(stdio->hInputReadyEvent);
}
if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
CloseHandle(stdio->hInputDoneEvent);
}
if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
TerminateThread(stdio->hInputThread, 0);
}
g_free(chr->opaque);
g_free(chr);
}
static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
{
CharDriverState *chr;
WinStdioCharState *stdio;
DWORD dwMode;
int is_console = 0;
chr = qemu_chr_alloc();
stdio = g_malloc0(sizeof(WinStdioCharState));
stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
fprintf(stderr, "cannot open stdio: invalid handle\n");
exit(1);
}
is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
chr->opaque = stdio;
chr->chr_write = win_stdio_write;
chr->chr_close = win_stdio_close;
if (is_console) {
if (qemu_add_wait_object(stdio->hStdIn,
win_stdio_wait_func, chr)) {
fprintf(stderr, "qemu_add_wait_object: failed\n");
}
} else {
DWORD dwId;
stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
chr, 0, &dwId);
if (stdio->hInputThread == INVALID_HANDLE_VALUE
|| stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
|| stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
fprintf(stderr, "cannot create stdio thread or event\n");
exit(1);
}
if (qemu_add_wait_object(stdio->hInputReadyEvent,
win_stdio_thread_wait_func, chr)) {
fprintf(stderr, "qemu_add_wait_object: failed\n");
}
}
dwMode |= ENABLE_LINE_INPUT;
if (is_console) {
/* set the terminal in raw mode */
/* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
dwMode |= ENABLE_PROCESSED_INPUT;
}
SetConsoleMode(stdio->hStdIn, dwMode);
chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
qemu_chr_fe_set_echo(chr, false);
return chr;
}
#endif /* !_WIN32 */
/***********************************************************/
/* UDP Net console */
typedef struct {
int fd;
GIOChannel *chan;
uint8_t buf[READ_BUF_LEN];
int bufcnt;
int bufptr;
int max_size;
} NetCharDriver;
/* Called with chr_write_lock held. */
static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
NetCharDriver *s = chr->opaque;
gsize bytes_written;
GIOStatus status;
status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
if (status == G_IO_STATUS_EOF) {
return 0;
} else if (status != G_IO_STATUS_NORMAL) {
return -1;
}
return bytes_written;
}
static int udp_chr_read_poll(void *opaque)
{
CharDriverState *chr = opaque;
NetCharDriver *s = chr->opaque;
s->max_size = qemu_chr_be_can_write(chr);
/* If there were any stray characters in the queue process them
* first
*/
while (s->max_size > 0 && s->bufptr < s->bufcnt) {
qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
s->bufptr++;
s->max_size = qemu_chr_be_can_write(chr);
}
return s->max_size;
}
static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
{
CharDriverState *chr = opaque;
NetCharDriver *s = chr->opaque;
gsize bytes_read = 0;
GIOStatus status;
if (s->max_size == 0) {
return TRUE;
}
status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
&bytes_read, NULL);
s->bufcnt = bytes_read;
s->bufptr = s->bufcnt;
if (status != G_IO_STATUS_NORMAL) {
remove_fd_in_watch(chr);
return FALSE;
}
s->bufptr = 0;
while (s->max_size > 0 && s->bufptr < s->bufcnt) {
qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
s->bufptr++;
s->max_size = qemu_chr_be_can_write(chr);
}
return TRUE;
}
static void udp_chr_update_read_handler(CharDriverState *chr)
{
NetCharDriver *s = chr->opaque;
remove_fd_in_watch(chr);
if (s->chan) {
chr->fd_in_tag = io_add_watch_poll(s->chan, udp_chr_read_poll,
udp_chr_read, chr);
}
}
static void udp_chr_close(CharDriverState *chr)
{
NetCharDriver *s = chr->opaque;
remove_fd_in_watch(chr);
if (s->chan) {
g_io_channel_unref(s->chan);
closesocket(s->fd);
}
g_free(s);
qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
}
static CharDriverState *qemu_chr_open_udp_fd(int fd)
{
CharDriverState *chr = NULL;
NetCharDriver *s = NULL;
chr = qemu_chr_alloc();
s = g_malloc0(sizeof(NetCharDriver));
s->fd = fd;
s->chan = io_channel_from_socket(s->fd);
s->bufcnt = 0;
s->bufptr = 0;
chr->opaque = s;
chr->chr_write = udp_chr_write;
chr->chr_update_read_handler = udp_chr_update_read_handler;
chr->chr_close = udp_chr_close;
/* be isn't opened until we get a connection */
chr->explicit_be_open = true;
return chr;
}
static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
{
Error *local_err = NULL;
int fd = -1;
fd = inet_dgram_opts(opts, &local_err);
if (fd < 0) {
qerror_report_err(local_err);
error_free(local_err);
return NULL;
}
return qemu_chr_open_udp_fd(fd);
}
/***********************************************************/
/* TCP Net console */
typedef struct {
GIOChannel *chan, *listen_chan;
guint listen_tag;
int fd, listen_fd;
int connected;
int max_size;
int do_telnetopt;
int do_nodelay;
int is_unix;
int *read_msgfds;
int read_msgfds_num;
int *write_msgfds;
int write_msgfds_num;
} TCPCharDriver;
static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
#ifndef _WIN32
static int unix_send_msgfds(CharDriverState *chr, const uint8_t *buf, int len)
{
TCPCharDriver *s = chr->opaque;
struct msghdr msgh;
struct iovec iov;
int r;
size_t fd_size = s->write_msgfds_num * sizeof(int);
char control[CMSG_SPACE(fd_size)];
struct cmsghdr *cmsg;
memset(&msgh, 0, sizeof(msgh));
memset(control, 0, sizeof(control));
/* set the payload */
iov.iov_base = (uint8_t *) buf;
iov.iov_len = len;
msgh.msg_iov = &iov;
msgh.msg_iovlen = 1;
msgh.msg_control = control;
msgh.msg_controllen = sizeof(control);
cmsg = CMSG_FIRSTHDR(&msgh);
cmsg->cmsg_len = CMSG_LEN(fd_size);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
memcpy(CMSG_DATA(cmsg), s->write_msgfds, fd_size);
do {
r = sendmsg(s->fd, &msgh, 0);
} while (r < 0 && errno == EINTR);
/* free the written msgfds, no matter what */
if (s->write_msgfds_num) {
g_free(s->write_msgfds);
s->write_msgfds = 0;
s->write_msgfds_num = 0;
}
return r;
}
#endif
/* Called with chr_write_lock held. */
static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
TCPCharDriver *s = chr->opaque;
if (s->connected) {
#ifndef _WIN32
if (s->is_unix && s->write_msgfds_num) {
return unix_send_msgfds(chr, buf, len);
} else
#endif
{
return io_channel_send(s->chan, buf, len);
}
} else {
/* XXX: indicate an error ? */
return len;
}
}
static int tcp_chr_read_poll(void *opaque)
{
CharDriverState *chr = opaque;
TCPCharDriver *s = chr->opaque;
if (!s->connected)
return 0;
s->max_size = qemu_chr_be_can_write(chr);
return s->max_size;
}
#define IAC 255
#define IAC_BREAK 243
static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
TCPCharDriver *s,
uint8_t *buf, int *size)
{
/* Handle any telnet client's basic IAC options to satisfy char by
* char mode with no echo. All IAC options will be removed from
* the buf and the do_telnetopt variable will be used to track the
* state of the width of the IAC information.
*
* IAC commands come in sets of 3 bytes with the exception of the
* "IAC BREAK" command and the double IAC.
*/
int i;
int j = 0;
for (i = 0; i < *size; i++) {
if (s->do_telnetopt > 1) {
if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
/* Double IAC means send an IAC */
if (j != i)
buf[j] = buf[i];
j++;
s->do_telnetopt = 1;
} else {
if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
/* Handle IAC break commands by sending a serial break */
qemu_chr_be_event(chr, CHR_EVENT_BREAK);
s->do_telnetopt++;
}
s->do_telnetopt++;
}
if (s->do_telnetopt >= 4) {
s->do_telnetopt = 1;
}
} else {
if ((unsigned char)buf[i] == IAC) {
s->do_telnetopt = 2;
} else {
if (j != i)
buf[j] = buf[i];
j++;
}
}
}
*size = j;
}
static int tcp_get_msgfds(CharDriverState *chr, int *fds, int num)
{
TCPCharDriver *s = chr->opaque;
int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
if (to_copy) {
int i;
memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
/* Close unused fds */
for (i = to_copy; i < s->read_msgfds_num; i++) {
close(s->read_msgfds[i]);
}
g_free(s->read_msgfds);
s->read_msgfds = 0;
s->read_msgfds_num = 0;
}
return to_copy;
}
static int tcp_set_msgfds(CharDriverState *chr, int *fds, int num)
{
TCPCharDriver *s = chr->opaque;
/* clear old pending fd array */
if (s->write_msgfds) {
g_free(s->write_msgfds);
}
if (num) {
s->write_msgfds = g_malloc(num * sizeof(int));
memcpy(s->write_msgfds, fds, num * sizeof(int));
}
s->write_msgfds_num = num;
return 0;
}
#ifndef _WIN32
static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
{
TCPCharDriver *s = chr->opaque;
struct cmsghdr *cmsg;
for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
int fd_size, i;
if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) ||
cmsg->cmsg_level != SOL_SOCKET ||
cmsg->cmsg_type != SCM_RIGHTS) {
continue;
}
fd_size = cmsg->cmsg_len - CMSG_LEN(0);
if (!fd_size) {
continue;
}
/* close and clean read_msgfds */
for (i = 0; i < s->read_msgfds_num; i++) {
close(s->read_msgfds[i]);
}
if (s->read_msgfds_num) {
g_free(s->read_msgfds);
}
s->read_msgfds_num = fd_size / sizeof(int);
s->read_msgfds = g_malloc(fd_size);
memcpy(s->read_msgfds, CMSG_DATA(cmsg), fd_size);
for (i = 0; i < s->read_msgfds_num; i++) {
int fd = s->read_msgfds[i];
if (fd < 0) {
continue;
}
/* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
qemu_set_block(fd);
#ifndef MSG_CMSG_CLOEXEC
qemu_set_cloexec(fd);
#endif
}
}
}
static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
{
TCPCharDriver *s = chr->opaque;
struct msghdr msg = { NULL, };
struct iovec iov[1];
union {
struct cmsghdr cmsg;
char control[CMSG_SPACE(sizeof(int))];
} msg_control;
int flags = 0;
ssize_t ret;
iov[0].iov_base = buf;
iov[0].iov_len = len;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_control = &msg_control;
msg.msg_controllen = sizeof(msg_control);
#ifdef MSG_CMSG_CLOEXEC
flags |= MSG_CMSG_CLOEXEC;
#endif
ret = recvmsg(s->fd, &msg, flags);
if (ret > 0 && s->is_unix) {
unix_process_msgfd(chr, &msg);
}
return ret;
}
#else
static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
{
TCPCharDriver *s = chr->opaque;
return qemu_recv(s->fd, buf, len, 0);
}
#endif
static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
{
TCPCharDriver *s = chr->opaque;
return g_io_create_watch(s->chan, cond);
}
static void tcp_chr_disconnect(CharDriverState *chr)
{
TCPCharDriver *s = chr->opaque;
s->connected = 0;
if (s->listen_chan) {
s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN,
tcp_chr_accept, chr);
}
remove_fd_in_watch(chr);
g_io_channel_unref(s->chan);
s->chan = NULL;
closesocket(s->fd);
s->fd = -1;
qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
}
static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
{
CharDriverState *chr = opaque;
TCPCharDriver *s = chr->opaque;
uint8_t buf[READ_BUF_LEN];
int len, size;
if (cond & G_IO_HUP) {
/* connection closed */
tcp_chr_disconnect(chr);
return TRUE;
}
if (!s->connected || s->max_size <= 0) {
return TRUE;
}
len = sizeof(buf);
if (len > s->max_size)
len = s->max_size;
size = tcp_chr_recv(chr, (void *)buf, len);
if (size == 0) {
/* connection closed */
tcp_chr_disconnect(chr);
} else if (size > 0) {
if (s->do_telnetopt)
tcp_chr_process_IAC_bytes(chr, s, buf, &size);
if (size > 0)
qemu_chr_be_write(chr, buf, size);
}
return TRUE;
}
static int tcp_chr_sync_read(CharDriverState *chr, const uint8_t *buf, int len)
{
TCPCharDriver *s = chr->opaque;
int size;
if (!s->connected) {
return 0;
}
size = tcp_chr_recv(chr, (void *) buf, len);
if (size == 0) {
/* connection closed */
tcp_chr_disconnect(chr);
}
return size;
}
#ifndef _WIN32
CharDriverState *qemu_chr_open_eventfd(int eventfd)
{
CharDriverState *chr = qemu_chr_open_fd(eventfd, eventfd);
if (chr) {
chr->avail_connections = 1;
}
return chr;
}
#endif
static void tcp_chr_connect(void *opaque)
{
CharDriverState *chr = opaque;
TCPCharDriver *s = chr->opaque;
s->connected = 1;
if (s->chan) {
chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
tcp_chr_read, chr);
}
qemu_chr_be_generic_open(chr);
}
static void tcp_chr_update_read_handler(CharDriverState *chr)
{
TCPCharDriver *s = chr->opaque;
remove_fd_in_watch(chr);
if (s->chan) {
chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
tcp_chr_read, chr);
}
}
#define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
static void tcp_chr_telnet_init(int fd)
{
char buf[3];
/* Send the telnet negotion to put telnet in binary, no echo, single char mode */
IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
send(fd, (char *)buf, 3, 0);
IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
send(fd, (char *)buf, 3, 0);
IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
send(fd, (char *)buf, 3, 0);
IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
send(fd, (char *)buf, 3, 0);
}
static int tcp_chr_add_client(CharDriverState *chr, int fd)
{
TCPCharDriver *s = chr->opaque;
if (s->fd != -1)
return -1;
qemu_set_nonblock(fd);
if (s->do_nodelay)
socket_set_nodelay(fd);
s->fd = fd;
s->chan = io_channel_from_socket(fd);
if (s->listen_tag) {
g_source_remove(s->listen_tag);
s->listen_tag = 0;
}
tcp_chr_connect(chr);
return 0;
}
static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
{
CharDriverState *chr = opaque;
TCPCharDriver *s = chr->opaque;
struct sockaddr_in saddr;
#ifndef _WIN32
struct sockaddr_un uaddr;
#endif
struct sockaddr *addr;
socklen_t len;
int fd;
for(;;) {
#ifndef _WIN32
if (s->is_unix) {
len = sizeof(uaddr);
addr = (struct sockaddr *)&uaddr;
} else
#endif
{
len = sizeof(saddr);
addr = (struct sockaddr *)&saddr;
}
fd = qemu_accept(s->listen_fd, addr, &len);
if (fd < 0 && errno != EINTR) {
s->listen_tag = 0;
return FALSE;
} else if (fd >= 0) {
if (s->do_telnetopt)
tcp_chr_telnet_init(fd);
break;
}
}
if (tcp_chr_add_client(chr, fd) < 0)
close(fd);
return TRUE;
}
static void tcp_chr_close(CharDriverState *chr)
{
TCPCharDriver *s = chr->opaque;
int i;
if (s->fd >= 0) {
remove_fd_in_watch(chr);
if (s->chan) {
g_io_channel_unref(s->chan);
}
closesocket(s->fd);
}
if (s->listen_fd >= 0) {
if (s->listen_tag) {
g_source_remove(s->listen_tag);
s->listen_tag = 0;
}
if (s->listen_chan) {
g_io_channel_unref(s->listen_chan);
}
closesocket(s->listen_fd);
}
if (s->read_msgfds_num) {
for (i = 0; i < s->read_msgfds_num; i++) {
close(s->read_msgfds[i]);
}
g_free(s->read_msgfds);
}
if (s->write_msgfds_num) {
g_free(s->write_msgfds);
}
g_free(s);
qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
}
static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
bool is_listen, bool is_telnet,
bool is_waitconnect,
Error **errp)
{
CharDriverState *chr = NULL;
TCPCharDriver *s = NULL;
char host[NI_MAXHOST], serv[NI_MAXSERV];
const char *left = "", *right = "";
struct sockaddr_storage ss;
socklen_t ss_len = sizeof(ss);
memset(&ss, 0, ss_len);
if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
error_setg_errno(errp, errno, "getsockname");
return NULL;
}
chr = qemu_chr_alloc();
s = g_malloc0(sizeof(TCPCharDriver));
s->connected = 0;
s->fd = -1;
s->listen_fd = -1;
s->read_msgfds = 0;
s->read_msgfds_num = 0;
s->write_msgfds = 0;
s->write_msgfds_num = 0;
chr->filename = g_malloc(256);
switch (ss.ss_family) {
#ifndef _WIN32
case AF_UNIX:
s->is_unix = 1;
snprintf(chr->filename, 256, "unix:%s%s",
((struct sockaddr_un *)(&ss))->sun_path,
is_listen ? ",server" : "");
break;
#endif
case AF_INET6:
left = "[";
right = "]";
/* fall through */
case AF_INET:
s->do_nodelay = do_nodelay;
getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
snprintf(chr->filename, 256, "%s:%s%s%s:%s%s",
is_telnet ? "telnet" : "tcp",
left, host, right, serv,
is_listen ? ",server" : "");
break;
}
chr->opaque = s;
chr->chr_write = tcp_chr_write;
chr->chr_sync_read = tcp_chr_sync_read;
chr->chr_close = tcp_chr_close;
chr->get_msgfds = tcp_get_msgfds;
chr->set_msgfds = tcp_set_msgfds;
chr->chr_add_client = tcp_chr_add_client;
chr->chr_add_watch = tcp_chr_add_watch;
chr->chr_update_read_handler = tcp_chr_update_read_handler;
/* be isn't opened until we get a connection */
chr->explicit_be_open = true;
if (is_listen) {
s->listen_fd = fd;
s->listen_chan = io_channel_from_socket(s->listen_fd);
s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
if (is_telnet) {
s->do_telnetopt = 1;
}
} else {
s->connected = 1;
s->fd = fd;
socket_set_nodelay(fd);
s->chan = io_channel_from_socket(s->fd);
tcp_chr_connect(chr);
}
if (is_listen && is_waitconnect) {
fprintf(stderr, "QEMU waiting for connection on: %s\n",
chr->filename);
tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
qemu_set_nonblock(s->listen_fd);
}
return chr;
}
static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
{
CharDriverState *chr = NULL;
Error *local_err = NULL;
int fd = -1;
bool is_listen = qemu_opt_get_bool(opts, "server", false);
bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true);
bool is_telnet = qemu_opt_get_bool(opts, "telnet", false);
bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true);
bool is_unix = qemu_opt_get(opts, "path") != NULL;
if (is_unix) {
if (is_listen) {
fd = unix_listen_opts(opts, &local_err);
} else {
fd = unix_connect_opts(opts, &local_err, NULL, NULL);
}
} else {
if (is_listen) {
fd = inet_listen_opts(opts, 0, &local_err);
} else {
fd = inet_connect_opts(opts, &local_err, NULL, NULL);
}
}
if (fd < 0) {
goto fail;
}
if (!is_waitconnect)
qemu_set_nonblock(fd);
chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet,
is_waitconnect, &local_err);
if (local_err) {
goto fail;
}
return chr;
fail:
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
}
if (fd >= 0) {
closesocket(fd);
}
if (chr) {
g_free(chr->opaque);
g_free(chr);
}
return NULL;
}
/*********************************************************/
/* Ring buffer chardev */
typedef struct {
size_t size;
size_t prod;
size_t cons;
uint8_t *cbuf;
} RingBufCharDriver;
static size_t ringbuf_count(const CharDriverState *chr)
{
const RingBufCharDriver *d = chr->opaque;
return d->prod - d->cons;
}
/* Called with chr_write_lock held. */
static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
RingBufCharDriver *d = chr->opaque;
int i;
if (!buf || (len < 0)) {
return -1;
}
for (i = 0; i < len; i++ ) {
d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
if (d->prod - d->cons > d->size) {
d->cons = d->prod - d->size;
}
}
return 0;
}
static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
{
RingBufCharDriver *d = chr->opaque;
int i;
qemu_mutex_lock(&chr->chr_write_lock);
for (i = 0; i < len && d->cons != d->prod; i++) {
buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
}
qemu_mutex_unlock(&chr->chr_write_lock);
return i;
}
static void ringbuf_chr_close(struct CharDriverState *chr)
{
RingBufCharDriver *d = chr->opaque;
g_free(d->cbuf);
g_free(d);
chr->opaque = NULL;
}
static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts,
Error **errp)
{
CharDriverState *chr;
RingBufCharDriver *d;
chr = qemu_chr_alloc();
d = g_malloc(sizeof(*d));
d->size = opts->has_size ? opts->size : 65536;
/* The size must be power of 2 */
if (d->size & (d->size - 1)) {
error_setg(errp, "size of ringbuf chardev must be power of two");
goto fail;
}
d->prod = 0;
d->cons = 0;
d->cbuf = g_malloc0(d->size);
chr->opaque = d;
chr->chr_write = ringbuf_chr_write;
chr->chr_close = ringbuf_chr_close;
return chr;
fail:
g_free(d);
g_free(chr);
return NULL;
}
bool chr_is_ringbuf(const CharDriverState *chr)
{
return chr->chr_write == ringbuf_chr_write;
}
void qmp_ringbuf_write(const char *device, const char *data,
bool has_format, enum DataFormat format,
Error **errp)
{
CharDriverState *chr;
const uint8_t *write_data;
int ret;
gsize write_count;
chr = qemu_chr_find(device);
if (!chr) {
error_setg(errp, "Device '%s' not found", device);
return;
}
if (!chr_is_ringbuf(chr)) {
error_setg(errp,"%s is not a ringbuf device", device);
return;
}
if (has_format && (format == DATA_FORMAT_BASE64)) {
write_data = g_base64_decode(data, &write_count);
} else {
write_data = (uint8_t *)data;
write_count = strlen(data);
}
ret = ringbuf_chr_write(chr, write_data, write_count);
if (write_data != (uint8_t *)data) {
g_free((void *)write_data);
}
if (ret < 0) {
error_setg(errp, "Failed to write to device %s", device);
return;
}
}
char *qmp_ringbuf_read(const char *device, int64_t size,
bool has_format, enum DataFormat format,
Error **errp)
{
CharDriverState *chr;
uint8_t *read_data;
size_t count;
char *data;
chr = qemu_chr_find(device);
if (!chr) {
error_setg(errp, "Device '%s' not found", device);
return NULL;
}
if (!chr_is_ringbuf(chr)) {
error_setg(errp,"%s is not a ringbuf device", device);
return NULL;
}
if (size <= 0) {
error_setg(errp, "size must be greater than zero");
return NULL;
}
count = ringbuf_count(chr);
size = size > count ? count : size;
read_data = g_malloc(size + 1);
ringbuf_chr_read(chr, read_data, size);
if (has_format && (format == DATA_FORMAT_BASE64)) {
data = g_base64_encode(read_data, size);
g_free(read_data);
} else {
/*
* FIXME should read only complete, valid UTF-8 characters up
* to @size bytes. Invalid sequences should be replaced by a
* suitable replacement character. Except when (and only
* when) ring buffer lost characters since last read, initial
* continuation characters should be dropped.
*/
read_data[size] = 0;
data = (char *)read_data;
}
return data;
}
QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
{
char host[65], port[33], width[8], height[8];
int pos;
const char *p;
QemuOpts *opts;
Error *local_err = NULL;
opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
return NULL;
}
if (strstart(filename, "mon:", &p)) {
filename = p;
qemu_opt_set(opts, "mux", "on");
if (strcmp(filename, "stdio") == 0) {
/* Monitor is muxed to stdio: do not exit on Ctrl+C by default
* but pass it to the guest. Handle this only for compat syntax,
* for -chardev syntax we have special option for this.
* This is what -nographic did, redirecting+muxing serial+monitor
* to stdio causing Ctrl+C to be passed to guest. */
qemu_opt_set(opts, "signal", "off");
}
}
if (strcmp(filename, "null") == 0 ||
strcmp(filename, "pty") == 0 ||
strcmp(filename, "msmouse") == 0 ||
strcmp(filename, "braille") == 0 ||
strcmp(filename, "testdev") == 0 ||
strcmp(filename, "stdio") == 0) {
qemu_opt_set(opts, "backend", filename);
return opts;
}
if (strstart(filename, "vc", &p)) {
qemu_opt_set(opts, "backend", "vc");
if (*p == ':') {
if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
/* pixels */
qemu_opt_set(opts, "width", width);
qemu_opt_set(opts, "height", height);
} else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
/* chars */
qemu_opt_set(opts, "cols", width);
qemu_opt_set(opts, "rows", height);
} else {
goto fail;
}
}
return opts;
}
if (strcmp(filename, "con:") == 0) {
qemu_opt_set(opts, "backend", "console");
return opts;
}
if (strstart(filename, "COM", NULL)) {
qemu_opt_set(opts, "backend", "serial");
qemu_opt_set(opts, "path", filename);
return opts;
}
if (strstart(filename, "file:", &p)) {
qemu_opt_set(opts, "backend", "file");
qemu_opt_set(opts, "path", p);
return opts;
}
if (strstart(filename, "pipe:", &p)) {
qemu_opt_set(opts, "backend", "pipe");
qemu_opt_set(opts, "path", p);
return opts;
}
if (strstart(filename, "tcp:", &p) ||
strstart(filename, "telnet:", &p)) {
if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
host[0] = 0;
if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
goto fail;
}
qemu_opt_set(opts, "backend", "socket");
qemu_opt_set(opts, "host", host);
qemu_opt_set(opts, "port", port);
if (p[pos] == ',') {
if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
goto fail;
}
if (strstart(filename, "telnet:", &p))
qemu_opt_set(opts, "telnet", "on");
return opts;
}
if (strstart(filename, "udp:", &p)) {
qemu_opt_set(opts, "backend", "udp");
if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
host[0] = 0;
if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
goto fail;
}
}
qemu_opt_set(opts, "host", host);
qemu_opt_set(opts, "port", port);
if (p[pos] == '@') {
p += pos + 1;
if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
host[0] = 0;
if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
goto fail;
}
}
qemu_opt_set(opts, "localaddr", host);
qemu_opt_set(opts, "localport", port);
}
return opts;
}
if (strstart(filename, "unix:", &p)) {
qemu_opt_set(opts, "backend", "socket");
if (qemu_opts_do_parse(opts, p, "path") != 0)
goto fail;
return opts;
}
if (strstart(filename, "/dev/parport", NULL) ||
strstart(filename, "/dev/ppi", NULL)) {
qemu_opt_set(opts, "backend", "parport");
qemu_opt_set(opts, "path", filename);
return opts;
}
if (strstart(filename, "/dev/", NULL)) {
qemu_opt_set(opts, "backend", "tty");
qemu_opt_set(opts, "path", filename);
return opts;
}
fail:
qemu_opts_del(opts);
return NULL;
}
static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
const char *path = qemu_opt_get(opts, "path");
if (path == NULL) {
error_setg(errp, "chardev: file: no filename given");
return;
}
backend->file = g_new0(ChardevFile, 1);
backend->file->out = g_strdup(path);
}
static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
backend->stdio = g_new0(ChardevStdio, 1);
backend->stdio->has_signal = true;
backend->stdio->signal = qemu_opt_get_bool(opts, "signal", true);
}
static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
const char *device = qemu_opt_get(opts, "path");
if (device == NULL) {
error_setg(errp, "chardev: serial/tty: no device path given");
return;
}
backend->serial = g_new0(ChardevHostdev, 1);
backend->serial->device = g_strdup(device);
}
static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
const char *device = qemu_opt_get(opts, "path");
if (device == NULL) {
error_setg(errp, "chardev: parallel: no device path given");
return;
}
backend->parallel = g_new0(ChardevHostdev, 1);
backend->parallel->device = g_strdup(device);
}
static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
const char *device = qemu_opt_get(opts, "path");
if (device == NULL) {
error_setg(errp, "chardev: pipe: no device path given");
return;
}
backend->pipe = g_new0(ChardevHostdev, 1);
backend->pipe->device = g_strdup(device);
}
static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
int val;
backend->ringbuf = g_new0(ChardevRingbuf, 1);
val = qemu_opt_get_size(opts, "size", 0);
if (val != 0) {
backend->ringbuf->has_size = true;
backend->ringbuf->size = val;
}
}
static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
const char *chardev = qemu_opt_get(opts, "chardev");
if (chardev == NULL) {
error_setg(errp, "chardev: mux: no chardev given");
return;
}
backend->mux = g_new0(ChardevMux, 1);
backend->mux->chardev = g_strdup(chardev);
}
typedef struct CharDriver {
const char *name;
/* old, pre qapi */
CharDriverState *(*open)(QemuOpts *opts);
/* new, qapi-based */
ChardevBackendKind kind;
void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
} CharDriver;
static GSList *backends;
void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *))
{
CharDriver *s;
s = g_malloc0(sizeof(*s));
s->name = g_strdup(name);
s->open = open;
backends = g_slist_append(backends, s);
}
void register_char_driver_qapi(const char *name, ChardevBackendKind kind,
void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp))
{
CharDriver *s;
s = g_malloc0(sizeof(*s));
s->name = g_strdup(name);
s->kind = kind;
s->parse = parse;
backends = g_slist_append(backends, s);
}
CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
void (*init)(struct CharDriverState *s),
Error **errp)
{
Error *local_err = NULL;
CharDriver *cd;
CharDriverState *chr;
GSList *i;
if (qemu_opts_id(opts) == NULL) {
error_setg(errp, "chardev: no id specified");
goto err;
}
if (qemu_opt_get(opts, "backend") == NULL) {
error_setg(errp, "chardev: \"%s\" missing backend",
qemu_opts_id(opts));
goto err;
}
for (i = backends; i; i = i->next) {
cd = i->data;
if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
break;
}
}
if (i == NULL) {
error_setg(errp, "chardev: backend \"%s\" not found",
qemu_opt_get(opts, "backend"));
goto err;
}
if (!cd->open) {
/* using new, qapi init */
ChardevBackend *backend = g_new0(ChardevBackend, 1);
ChardevReturn *ret = NULL;
const char *id = qemu_opts_id(opts);
char *bid = NULL;
if (qemu_opt_get_bool(opts, "mux", 0)) {
bid = g_strdup_printf("%s-base", id);
}
chr = NULL;
backend->kind = cd->kind;
if (cd->parse) {
cd->parse(opts, backend, &local_err);
if (local_err) {
error_propagate(errp, local_err);
goto qapi_out;
}
}
ret = qmp_chardev_add(bid ? bid : id, backend, errp);
if (!ret) {
goto qapi_out;
}
if (bid) {
qapi_free_ChardevBackend(backend);
qapi_free_ChardevReturn(ret);
backend = g_new0(ChardevBackend, 1);
backend->mux = g_new0(ChardevMux, 1);
backend->kind = CHARDEV_BACKEND_KIND_MUX;
backend->mux->chardev = g_strdup(bid);
ret = qmp_chardev_add(id, backend, errp);
if (!ret) {
chr = qemu_chr_find(bid);
qemu_chr_delete(chr);
chr = NULL;
goto qapi_out;
}
}
chr = qemu_chr_find(id);
chr->opts = opts;
qapi_out:
qapi_free_ChardevBackend(backend);
qapi_free_ChardevReturn(ret);
g_free(bid);
return chr;
}
chr = cd->open(opts);
if (!chr) {
error_setg(errp, "chardev: opening backend \"%s\" failed",
qemu_opt_get(opts, "backend"));
goto err;
}
if (!chr->filename)
chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
chr->init = init;
/* if we didn't create the chardev via qmp_chardev_add, we
* need to send the OPENED event here
*/
if (!chr->explicit_be_open) {
qemu_chr_be_event(chr, CHR_EVENT_OPENED);
}
QTAILQ_INSERT_TAIL(&chardevs, chr, next);
if (qemu_opt_get_bool(opts, "mux", 0)) {
CharDriverState *base = chr;
int len = strlen(qemu_opts_id(opts)) + 6;
base->label = g_malloc(len);
snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
chr = qemu_chr_open_mux(base);
chr->filename = base->filename;
chr->avail_connections = MAX_MUX;
QTAILQ_INSERT_TAIL(&chardevs, chr, next);
} else {
chr->avail_connections = 1;
}
chr->label = g_strdup(qemu_opts_id(opts));
chr->opts = opts;
return chr;
err:
qemu_opts_del(opts);
return NULL;
}
CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
{
const char *p;
CharDriverState *chr;
QemuOpts *opts;
Error *err = NULL;
if (strstart(filename, "chardev:", &p)) {
return qemu_chr_find(p);
}
opts = qemu_chr_parse_compat(label, filename);
if (!opts)
return NULL;
chr = qemu_chr_new_from_opts(opts, init, &err);
if (err) {
error_report("%s", error_get_pretty(err));
error_free(err);
}
if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
qemu_chr_fe_claim_no_fail(chr);
monitor_init(chr, MONITOR_USE_READLINE);
}
return chr;
}
void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
{
if (chr->chr_set_echo) {
chr->chr_set_echo(chr, echo);
}
}
void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
{
if (chr->fe_open == fe_open) {
return;
}
chr->fe_open = fe_open;
if (chr->chr_set_fe_open) {
chr->chr_set_fe_open(chr, fe_open);
}
}
void qemu_chr_fe_event(struct CharDriverState *chr, int event)
{
if (chr->chr_fe_event) {
chr->chr_fe_event(chr, event);
}
}
int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
GIOFunc func, void *user_data)
{
GSource *src;
guint tag;
if (s->chr_add_watch == NULL) {
return -ENOSYS;
}
src = s->chr_add_watch(s, cond);
if (!src) {
return -EINVAL;
}
g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
tag = g_source_attach(src, NULL);
g_source_unref(src);
return tag;
}
int qemu_chr_fe_claim(CharDriverState *s)
{
if (s->avail_connections < 1) {
return -1;
}
s->avail_connections--;
return 0;
}
void qemu_chr_fe_claim_no_fail(CharDriverState *s)
{
if (qemu_chr_fe_claim(s) != 0) {
fprintf(stderr, "%s: error chardev \"%s\" already used\n",
__func__, s->label);
exit(1);
}
}
void qemu_chr_fe_release(CharDriverState *s)
{
s->avail_connections++;
}
void qemu_chr_delete(CharDriverState *chr)
{
QTAILQ_REMOVE(&chardevs, chr, next);
if (chr->chr_close) {
chr->chr_close(chr);
}
g_free(chr->filename);
g_free(chr->label);
if (chr->opts) {
qemu_opts_del(chr->opts);
}
g_free(chr);
}
ChardevInfoList *qmp_query_chardev(Error **errp)
{
ChardevInfoList *chr_list = NULL;
CharDriverState *chr;
QTAILQ_FOREACH(chr, &chardevs, next) {
ChardevInfoList *info = g_malloc0(sizeof(*info));
info->value = g_malloc0(sizeof(*info->value));
info->value->label = g_strdup(chr->label);
info->value->filename = g_strdup(chr->filename);
info->value->frontend_open = chr->fe_open;
info->next = chr_list;
chr_list = info;
}
return chr_list;
}
ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp)
{
ChardevBackendInfoList *backend_list = NULL;
CharDriver *c = NULL;
GSList *i = NULL;
for (i = backends; i; i = i->next) {
ChardevBackendInfoList *info = g_malloc0(sizeof(*info));
c = i->data;
info->value = g_malloc0(sizeof(*info->value));
info->value->name = g_strdup(c->name);
info->next = backend_list;
backend_list = info;
}
return backend_list;
}
CharDriverState *qemu_chr_find(const char *name)
{
CharDriverState *chr;
QTAILQ_FOREACH(chr, &chardevs, next) {
if (strcmp(chr->label, name) != 0)
continue;
return chr;
}
return NULL;
}
/* Get a character (serial) device interface. */
CharDriverState *qemu_char_get_next_serial(void)
{
static int next_serial;
CharDriverState *chr;
/* FIXME: This function needs to go away: use chardev properties! */
while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
chr = serial_hds[next_serial++];
qemu_chr_fe_claim_no_fail(chr);
return chr;
}
return NULL;
}
QemuOptsList qemu_chardev_opts = {
.name = "chardev",
.implied_opt_name = "backend",
.head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
.desc = {
{
.name = "backend",
.type = QEMU_OPT_STRING,
},{
.name = "path",
.type = QEMU_OPT_STRING,
},{
.name = "host",
.type = QEMU_OPT_STRING,
},{
.name = "port",
.type = QEMU_OPT_STRING,
},{
.name = "localaddr",
.type = QEMU_OPT_STRING,
},{
.name = "localport",
.type = QEMU_OPT_STRING,
},{
.name = "to",
.type = QEMU_OPT_NUMBER,
},{
.name = "ipv4",
.type = QEMU_OPT_BOOL,
},{
.name = "ipv6",
.type = QEMU_OPT_BOOL,
},{
.name = "wait",
.type = QEMU_OPT_BOOL,
},{
.name = "server",
.type = QEMU_OPT_BOOL,
},{
.name = "delay",
.type = QEMU_OPT_BOOL,
},{
.name = "telnet",
.type = QEMU_OPT_BOOL,
},{
.name = "width",
.type = QEMU_OPT_NUMBER,
},{
.name = "height",
.type = QEMU_OPT_NUMBER,
},{
.name = "cols",
.type = QEMU_OPT_NUMBER,
},{
.name = "rows",
.type = QEMU_OPT_NUMBER,
},{
.name = "mux",
.type = QEMU_OPT_BOOL,
},{
.name = "signal",
.type = QEMU_OPT_BOOL,
},{
.name = "name",
.type = QEMU_OPT_STRING,
},{
.name = "debug",
.type = QEMU_OPT_NUMBER,
},{
.name = "size",
.type = QEMU_OPT_SIZE,
},{
.name = "chardev",
.type = QEMU_OPT_STRING,
},
{ /* end of list */ }
},
};
#ifdef _WIN32
static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
{
HANDLE out;
if (file->has_in) {
error_setg(errp, "input file not supported");
return NULL;
}
out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (out == INVALID_HANDLE_VALUE) {
error_setg(errp, "open %s failed", file->out);
return NULL;
}
return qemu_chr_open_win_file(out);
}
static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
Error **errp)
{
return qemu_chr_open_win_path(serial->device);
}
static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
Error **errp)
{
error_setg(errp, "character device backend type 'parallel' not supported");
return NULL;
}
#else /* WIN32 */
static int qmp_chardev_open_file_source(char *src, int flags,
Error **errp)
{
int fd = -1;
TFR(fd = qemu_open(src, flags, 0666));
if (fd == -1) {
error_setg_file_open(errp, errno, src);
}
return fd;
}
static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
{
int flags, in = -1, out;
flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
out = qmp_chardev_open_file_source(file->out, flags, errp);
if (out < 0) {
return NULL;
}
if (file->has_in) {
flags = O_RDONLY;
in = qmp_chardev_open_file_source(file->in, flags, errp);
if (in < 0) {
qemu_close(out);
return NULL;
}
}
return qemu_chr_open_fd(in, out);
}
static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
Error **errp)
{
#ifdef HAVE_CHARDEV_TTY
int fd;
fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
if (fd < 0) {
return NULL;
}
qemu_set_nonblock(fd);
return qemu_chr_open_tty_fd(fd);
#else
error_setg(errp, "character device backend type 'serial' not supported");
return NULL;
#endif
}
static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
Error **errp)
{
#ifdef HAVE_CHARDEV_PARPORT
int fd;
fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
if (fd < 0) {
return NULL;
}
return qemu_chr_open_pp_fd(fd);
#else
error_setg(errp, "character device backend type 'parallel' not supported");
return NULL;
#endif
}
#endif /* WIN32 */
static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
Error **errp)
{
SocketAddress *addr = sock->addr;
bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
bool is_listen = sock->has_server ? sock->server : true;
bool is_telnet = sock->has_telnet ? sock->telnet : false;
bool is_waitconnect = sock->has_wait ? sock->wait : false;
int fd;
if (is_listen) {
fd = socket_listen(addr, errp);
} else {
fd = socket_connect(addr, errp, NULL, NULL);
}
if (fd < 0) {
return NULL;
}
return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
is_telnet, is_waitconnect, errp);
}
static CharDriverState *qmp_chardev_open_udp(ChardevUdp *udp,
Error **errp)
{
int fd;
fd = socket_dgram(udp->remote, udp->local, errp);
if (fd < 0) {
return NULL;
}
return qemu_chr_open_udp_fd(fd);
}
ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
Error **errp)
{
ChardevReturn *ret = g_new0(ChardevReturn, 1);
CharDriverState *base, *chr = NULL;
chr = qemu_chr_find(id);
if (chr) {
error_setg(errp, "Chardev '%s' already exists", id);
g_free(ret);
return NULL;
}
switch (backend->kind) {
case CHARDEV_BACKEND_KIND_FILE:
chr = qmp_chardev_open_file(backend->file, errp);
break;
case CHARDEV_BACKEND_KIND_SERIAL:
chr = qmp_chardev_open_serial(backend->serial, errp);
break;
case CHARDEV_BACKEND_KIND_PARALLEL:
chr = qmp_chardev_open_parallel(backend->parallel, errp);
break;
case CHARDEV_BACKEND_KIND_PIPE:
chr = qemu_chr_open_pipe(backend->pipe);
break;
case CHARDEV_BACKEND_KIND_SOCKET:
chr = qmp_chardev_open_socket(backend->socket, errp);
break;
case CHARDEV_BACKEND_KIND_UDP:
chr = qmp_chardev_open_udp(backend->udp, errp);
break;
#ifdef HAVE_CHARDEV_TTY
case CHARDEV_BACKEND_KIND_PTY:
chr = qemu_chr_open_pty(id, ret);
break;
#endif
case CHARDEV_BACKEND_KIND_NULL:
chr = qemu_chr_open_null();
break;
case CHARDEV_BACKEND_KIND_MUX:
base = qemu_chr_find(backend->mux->chardev);
if (base == NULL) {
error_setg(errp, "mux: base chardev %s not found",
backend->mux->chardev);
break;
}
chr = qemu_chr_open_mux(base);
break;
case CHARDEV_BACKEND_KIND_MSMOUSE:
chr = qemu_chr_open_msmouse();
break;
#ifdef CONFIG_BRLAPI
case CHARDEV_BACKEND_KIND_BRAILLE:
chr = chr_baum_init();
break;
#endif
case CHARDEV_BACKEND_KIND_TESTDEV:
chr = chr_testdev_init();
break;
case CHARDEV_BACKEND_KIND_STDIO:
chr = qemu_chr_open_stdio(backend->stdio);
break;
#ifdef _WIN32
case CHARDEV_BACKEND_KIND_CONSOLE:
chr = qemu_chr_open_win_con();
break;
#endif
#ifdef CONFIG_SPICE
case CHARDEV_BACKEND_KIND_SPICEVMC:
chr = qemu_chr_open_spice_vmc(backend->spicevmc->type);
break;
case CHARDEV_BACKEND_KIND_SPICEPORT:
chr = qemu_chr_open_spice_port(backend->spiceport->fqdn);
break;
#endif
case CHARDEV_BACKEND_KIND_VC:
chr = vc_init(backend->vc);
break;
case CHARDEV_BACKEND_KIND_RINGBUF:
case CHARDEV_BACKEND_KIND_MEMORY:
chr = qemu_chr_open_ringbuf(backend->ringbuf, errp);
break;
default:
error_setg(errp, "unknown chardev backend (%d)", backend->kind);
break;
}
/*
* Character backend open hasn't been fully converted to the Error
* API. Some opens fail without setting an error. Set a generic
* error then.
* TODO full conversion to Error API
*/
if (chr == NULL && errp && !*errp) {
error_setg(errp, "Failed to create chardev");
}
if (chr) {
chr->label = g_strdup(id);
chr->avail_connections =
(backend->kind == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
if (!chr->filename) {
chr->filename = g_strdup(ChardevBackendKind_lookup[backend->kind]);
}
if (!chr->explicit_be_open) {
qemu_chr_be_event(chr, CHR_EVENT_OPENED);
}
QTAILQ_INSERT_TAIL(&chardevs, chr, next);
return ret;
} else {
g_free(ret);
return NULL;
}
}
void qmp_chardev_remove(const char *id, Error **errp)
{
CharDriverState *chr;
chr = qemu_chr_find(id);
if (NULL == chr) {
error_setg(errp, "Chardev '%s' not found", id);
return;
}
if (chr->chr_can_read || chr->chr_read ||
chr->chr_event || chr->handler_opaque) {
error_setg(errp, "Chardev '%s' is busy", id);
return;
}
qemu_chr_delete(chr);
}
static void register_types(void)
{
register_char_driver_qapi("null", CHARDEV_BACKEND_KIND_NULL, NULL);
register_char_driver("socket", qemu_chr_open_socket);
register_char_driver("udp", qemu_chr_open_udp);
register_char_driver_qapi("ringbuf", CHARDEV_BACKEND_KIND_RINGBUF,
qemu_chr_parse_ringbuf);
register_char_driver_qapi("file", CHARDEV_BACKEND_KIND_FILE,
qemu_chr_parse_file_out);
register_char_driver_qapi("stdio", CHARDEV_BACKEND_KIND_STDIO,
qemu_chr_parse_stdio);
register_char_driver_qapi("serial", CHARDEV_BACKEND_KIND_SERIAL,
qemu_chr_parse_serial);
register_char_driver_qapi("tty", CHARDEV_BACKEND_KIND_SERIAL,
qemu_chr_parse_serial);
register_char_driver_qapi("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
qemu_chr_parse_parallel);
register_char_driver_qapi("parport", CHARDEV_BACKEND_KIND_PARALLEL,
qemu_chr_parse_parallel);
register_char_driver_qapi("pty", CHARDEV_BACKEND_KIND_PTY, NULL);
register_char_driver_qapi("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL);
register_char_driver_qapi("pipe", CHARDEV_BACKEND_KIND_PIPE,
qemu_chr_parse_pipe);
register_char_driver_qapi("mux", CHARDEV_BACKEND_KIND_MUX,
qemu_chr_parse_mux);
/* Bug-compatibility: */
register_char_driver_qapi("memory", CHARDEV_BACKEND_KIND_MEMORY,
qemu_chr_parse_ringbuf);
/* this must be done after machine init, since we register FEs with muxes
* as part of realize functions like serial_isa_realizefn when -nographic
* is specified
*/
qemu_add_machine_init_done_notifier(&muxes_realize_notify);
}
type_init(register_types);
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