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#include "qemu/osdep.h"
#include "trace.h"
#include "ui/qemu-spice.h"
#include "sysemu/char.h"
#include <spice.h>
#include <spice/protocol.h>
typedef struct SpiceCharDriver {
CharDriverState* chr;
SpiceCharDeviceInstance sin;
bool active;
bool blocked;
const uint8_t *datapos;
int datalen;
QLIST_ENTRY(SpiceCharDriver) next;
} SpiceCharDriver;
typedef struct SpiceCharSource {
GSource source;
SpiceCharDriver *scd;
} SpiceCharSource;
static QLIST_HEAD(, SpiceCharDriver) spice_chars =
QLIST_HEAD_INITIALIZER(spice_chars);
static int vmc_write(SpiceCharDeviceInstance *sin, const uint8_t *buf, int len)
{
SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin);
ssize_t out = 0;
ssize_t last_out;
uint8_t* p = (uint8_t*)buf;
while (len > 0) {
int can_write = qemu_chr_be_can_write(scd->chr);
last_out = MIN(len, can_write);
if (last_out <= 0) {
break;
}
qemu_chr_be_write(scd->chr, p, last_out);
out += last_out;
len -= last_out;
p += last_out;
}
trace_spice_vmc_write(out, len + out);
return out;
}
static int vmc_read(SpiceCharDeviceInstance *sin, uint8_t *buf, int len)
{
SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin);
int bytes = MIN(len, scd->datalen);
if (bytes > 0) {
memcpy(buf, scd->datapos, bytes);
scd->datapos += bytes;
scd->datalen -= bytes;
assert(scd->datalen >= 0);
}
if (scd->datalen == 0) {
scd->datapos = 0;
scd->blocked = false;
}
trace_spice_vmc_read(bytes, len);
return bytes;
}
#if SPICE_SERVER_VERSION >= 0x000c02
static void vmc_event(SpiceCharDeviceInstance *sin, uint8_t event)
{
SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin);
int chr_event;
switch (event) {
case SPICE_PORT_EVENT_BREAK:
chr_event = CHR_EVENT_BREAK;
break;
default:
return;
}
trace_spice_vmc_event(chr_event);
qemu_chr_be_event(scd->chr, chr_event);
}
#endif
static void vmc_state(SpiceCharDeviceInstance *sin, int connected)
{
SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin);
if ((scd->chr->be_open && connected) ||
(!scd->chr->be_open && !connected)) {
return;
}
qemu_chr_be_event(scd->chr,
connected ? CHR_EVENT_OPENED : CHR_EVENT_CLOSED);
}
static SpiceCharDeviceInterface vmc_interface = {
.base.type = SPICE_INTERFACE_CHAR_DEVICE,
.base.description = "spice virtual channel char device",
.base.major_version = SPICE_INTERFACE_CHAR_DEVICE_MAJOR,
.base.minor_version = SPICE_INTERFACE_CHAR_DEVICE_MINOR,
.state = vmc_state,
.write = vmc_write,
.read = vmc_read,
#if SPICE_SERVER_VERSION >= 0x000c02
.event = vmc_event,
#endif
#if SPICE_SERVER_VERSION >= 0x000c06
.flags = SPICE_CHAR_DEVICE_NOTIFY_WRITABLE,
#endif
};
static void vmc_register_interface(SpiceCharDriver *scd)
{
if (scd->active) {
return;
}
scd->sin.base.sif = &vmc_interface.base;
qemu_spice_add_interface(&scd->sin.base);
scd->active = true;
trace_spice_vmc_register_interface(scd);
}
static void vmc_unregister_interface(SpiceCharDriver *scd)
{
if (!scd->active) {
return;
}
spice_server_remove_interface(&scd->sin.base);
scd->active = false;
trace_spice_vmc_unregister_interface(scd);
}
static gboolean spice_char_source_prepare(GSource *source, gint *timeout)
{
SpiceCharSource *src = (SpiceCharSource *)source;
*timeout = -1;
return !src->scd->blocked;
}
static gboolean spice_char_source_check(GSource *source)
{
SpiceCharSource *src = (SpiceCharSource *)source;
return !src->scd->blocked;
}
static gboolean spice_char_source_dispatch(GSource *source,
GSourceFunc callback, gpointer user_data)
{
GIOFunc func = (GIOFunc)callback;
return func(NULL, G_IO_OUT, user_data);
}
static GSourceFuncs SpiceCharSourceFuncs = {
.prepare = spice_char_source_prepare,
.check = spice_char_source_check,
.dispatch = spice_char_source_dispatch,
};
static GSource *spice_chr_add_watch(CharDriverState *chr, GIOCondition cond)
{
SpiceCharDriver *scd = chr->opaque;
SpiceCharSource *src;
assert(cond & G_IO_OUT);
src = (SpiceCharSource *)g_source_new(&SpiceCharSourceFuncs,
sizeof(SpiceCharSource));
src->scd = scd;
return (GSource *)src;
}
static int spice_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
SpiceCharDriver *s = chr->opaque;
int read_bytes;
assert(s->datalen == 0);
s->datapos = buf;
s->datalen = len;
spice_server_char_device_wakeup(&s->sin);
read_bytes = len - s->datalen;
if (read_bytes != len) {
/* We'll get passed in the unconsumed data with the next call */
s->datalen = 0;
s->datapos = NULL;
s->blocked = true;
}
return read_bytes;
}
static void spice_chr_close(struct CharDriverState *chr)
{
SpiceCharDriver *s = chr->opaque;
vmc_unregister_interface(s);
QLIST_REMOVE(s, next);
g_free((char *)s->sin.subtype);
#if SPICE_SERVER_VERSION >= 0x000c02
g_free((char *)s->sin.portname);
#endif
g_free(s);
}
static void spice_vmc_set_fe_open(struct CharDriverState *chr, int fe_open)
{
SpiceCharDriver *s = chr->opaque;
if (fe_open) {
vmc_register_interface(s);
} else {
vmc_unregister_interface(s);
}
}
static void spice_port_set_fe_open(struct CharDriverState *chr, int fe_open)
{
#if SPICE_SERVER_VERSION >= 0x000c02
SpiceCharDriver *s = chr->opaque;
if (fe_open) {
spice_server_port_event(&s->sin, SPICE_PORT_EVENT_OPENED);
} else {
spice_server_port_event(&s->sin, SPICE_PORT_EVENT_CLOSED);
}
#endif
}
static void spice_chr_fe_event(struct CharDriverState *chr, int event)
{
#if SPICE_SERVER_VERSION >= 0x000c02
SpiceCharDriver *s = chr->opaque;
spice_server_port_event(&s->sin, event);
#endif
}
static void print_allowed_subtypes(void)
{
const char** psubtype;
int i;
fprintf(stderr, "allowed names: ");
for(i=0, psubtype = spice_server_char_device_recognized_subtypes();
*psubtype != NULL; ++psubtype, ++i) {
if (i == 0) {
fprintf(stderr, "%s", *psubtype);
} else {
fprintf(stderr, ", %s", *psubtype);
}
}
fprintf(stderr, "\n");
}
static void spice_chr_accept_input(struct CharDriverState *chr)
{
SpiceCharDriver *s = chr->opaque;
spice_server_char_device_wakeup(&s->sin);
}
static CharDriverState *chr_open(const char *subtype,
void (*set_fe_open)(struct CharDriverState *,
int),
ChardevCommon *backend,
Error **errp)
{
CharDriverState *chr;
SpiceCharDriver *s;
chr = qemu_chr_alloc(backend, errp);
if (!chr) {
return NULL;
}
s = g_malloc0(sizeof(SpiceCharDriver));
s->chr = chr;
s->active = false;
s->sin.subtype = g_strdup(subtype);
chr->opaque = s;
chr->chr_write = spice_chr_write;
chr->chr_add_watch = spice_chr_add_watch;
chr->chr_close = spice_chr_close;
chr->chr_set_fe_open = set_fe_open;
chr->explicit_be_open = true;
chr->chr_fe_event = spice_chr_fe_event;
chr->chr_accept_input = spice_chr_accept_input;
QLIST_INSERT_HEAD(&spice_chars, s, next);
return chr;
}
static CharDriverState *qemu_chr_open_spice_vmc(const char *id,
ChardevBackend *backend,
ChardevReturn *ret,
Error **errp)
{
ChardevSpiceChannel *spicevmc = backend->u.spicevmc.data;
const char *type = spicevmc->type;
const char **psubtype = spice_server_char_device_recognized_subtypes();
ChardevCommon *common = qapi_ChardevSpiceChannel_base(spicevmc);
for (; *psubtype != NULL; ++psubtype) {
if (strcmp(type, *psubtype) == 0) {
break;
}
}
if (*psubtype == NULL) {
fprintf(stderr, "spice-qemu-char: unsupported type: %s\n", type);
print_allowed_subtypes();
return NULL;
}
return chr_open(type, spice_vmc_set_fe_open, common, errp);
}
#if SPICE_SERVER_VERSION >= 0x000c02
static CharDriverState *qemu_chr_open_spice_port(const char *id,
ChardevBackend *backend,
ChardevReturn *ret,
Error **errp)
{
ChardevSpicePort *spiceport = backend->u.spiceport.data;
const char *name = spiceport->fqdn;
ChardevCommon *common = qapi_ChardevSpicePort_base(spiceport);
CharDriverState *chr;
SpiceCharDriver *s;
if (name == NULL) {
fprintf(stderr, "spice-qemu-char: missing name parameter\n");
return NULL;
}
chr = chr_open("port", spice_port_set_fe_open, common, errp);
if (!chr) {
return NULL;
}
s = chr->opaque;
s->sin.portname = g_strdup(name);
return chr;
}
void qemu_spice_register_ports(void)
{
SpiceCharDriver *s;
QLIST_FOREACH(s, &spice_chars, next) {
if (s->sin.portname == NULL) {
continue;
}
vmc_register_interface(s);
}
}
#endif
static void qemu_chr_parse_spice_vmc(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
const char *name = qemu_opt_get(opts, "name");
ChardevSpiceChannel *spicevmc;
if (name == NULL) {
error_setg(errp, "chardev: spice channel: no name given");
return;
}
spicevmc = backend->u.spicevmc.data = g_new0(ChardevSpiceChannel, 1);
qemu_chr_parse_common(opts, qapi_ChardevSpiceChannel_base(spicevmc));
spicevmc->type = g_strdup(name);
}
static void qemu_chr_parse_spice_port(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
const char *name = qemu_opt_get(opts, "name");
ChardevSpicePort *spiceport;
if (name == NULL) {
error_setg(errp, "chardev: spice port: no name given");
return;
}
spiceport = backend->u.spiceport.data = g_new0(ChardevSpicePort, 1);
qemu_chr_parse_common(opts, qapi_ChardevSpicePort_base(spiceport));
spiceport->fqdn = g_strdup(name);
}
static void register_types(void)
{
register_char_driver("spicevmc", CHARDEV_BACKEND_KIND_SPICEVMC,
qemu_chr_parse_spice_vmc, qemu_chr_open_spice_vmc);
register_char_driver("spiceport", CHARDEV_BACKEND_KIND_SPICEPORT,
qemu_chr_parse_spice_port, qemu_chr_open_spice_port);
}
type_init(register_types);