qemu/spice-qemu-char.c

419 lines
11 KiB
C

#include "qemu/osdep.h"
#include "trace-root.h"
#include "ui/qemu-spice.h"
#include "sysemu/char.h"
#include "qemu/error-report.h"
#include <spice.h>
#include <spice/protocol.h>
typedef struct SpiceChardev {
Chardev parent;
SpiceCharDeviceInstance sin;
bool active;
bool blocked;
const uint8_t *datapos;
int datalen;
QLIST_ENTRY(SpiceChardev) next;
} SpiceChardev;
#define TYPE_CHARDEV_SPICE "chardev-spice"
#define TYPE_CHARDEV_SPICEVMC "chardev-spicevmc"
#define TYPE_CHARDEV_SPICEPORT "chardev-spiceport"
#define SPICE_CHARDEV(obj) OBJECT_CHECK(SpiceChardev, (obj), TYPE_CHARDEV_SPICE)
typedef struct SpiceCharSource {
GSource source;
SpiceChardev *scd;
} SpiceCharSource;
static QLIST_HEAD(, SpiceChardev) spice_chars =
QLIST_HEAD_INITIALIZER(spice_chars);
static int vmc_write(SpiceCharDeviceInstance *sin, const uint8_t *buf, int len)
{
SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
Chardev *chr = CHARDEV(scd);
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(chr);
last_out = MIN(len, can_write);
if (last_out <= 0) {
break;
}
qemu_chr_be_write(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)
{
SpiceChardev *scd = container_of(sin, SpiceChardev, 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)
{
SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
Chardev *chr = CHARDEV(scd);
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(chr, chr_event);
}
#endif
static void vmc_state(SpiceCharDeviceInstance *sin, int connected)
{
SpiceChardev *scd = container_of(sin, SpiceChardev, sin);
Chardev *chr = CHARDEV(scd);
if ((chr->be_open && connected) ||
(!chr->be_open && !connected)) {
return;
}
qemu_chr_be_event(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(SpiceChardev *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(SpiceChardev *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(Chardev *chr, GIOCondition cond)
{
SpiceChardev *scd = SPICE_CHARDEV(chr);
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(Chardev *chr, const uint8_t *buf, int len)
{
SpiceChardev *s = SPICE_CHARDEV(chr);
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 char_spice_finalize(Object *obj)
{
SpiceChardev *s = SPICE_CHARDEV(obj);
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
}
static void spice_vmc_set_fe_open(struct Chardev *chr, int fe_open)
{
SpiceChardev *s = SPICE_CHARDEV(chr);
if (fe_open) {
vmc_register_interface(s);
} else {
vmc_unregister_interface(s);
}
}
static void spice_port_set_fe_open(struct Chardev *chr, int fe_open)
{
#if SPICE_SERVER_VERSION >= 0x000c02
SpiceChardev *s = SPICE_CHARDEV(chr);
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_accept_input(struct Chardev *chr)
{
SpiceChardev *s = SPICE_CHARDEV(chr);
spice_server_char_device_wakeup(&s->sin);
}
static void chr_open(Chardev *chr, const char *subtype)
{
SpiceChardev *s = SPICE_CHARDEV(chr);
s->active = false;
s->sin.subtype = g_strdup(subtype);
QLIST_INSERT_HEAD(&spice_chars, s, next);
}
static void qemu_chr_open_spice_vmc(Chardev *chr,
ChardevBackend *backend,
bool *be_opened,
Error **errp)
{
ChardevSpiceChannel *spicevmc = backend->u.spicevmc.data;
const char *type = spicevmc->type;
const char **psubtype = spice_server_char_device_recognized_subtypes();
for (; *psubtype != NULL; ++psubtype) {
if (strcmp(type, *psubtype) == 0) {
break;
}
}
if (*psubtype == NULL) {
char *subtypes = g_strjoinv(", ",
(gchar **)spice_server_char_device_recognized_subtypes());
error_setg(errp, "unsupported type name: %s", type);
error_append_hint(errp, "allowed spice char type names: %s\n",
subtypes);
g_free(subtypes);
return;
}
*be_opened = false;
chr_open(chr, type);
}
#if SPICE_SERVER_VERSION >= 0x000c02
static void qemu_chr_open_spice_port(Chardev *chr,
ChardevBackend *backend,
bool *be_opened,
Error **errp)
{
ChardevSpicePort *spiceport = backend->u.spiceport.data;
const char *name = spiceport->fqdn;
SpiceChardev *s;
if (name == NULL) {
error_setg(errp, "missing name parameter");
return;
}
chr_open(chr, "port");
*be_opened = false;
s = SPICE_CHARDEV(chr);
s->sin.portname = g_strdup(name);
}
void qemu_spice_register_ports(void)
{
SpiceChardev *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;
}
backend->type = CHARDEV_BACKEND_KIND_SPICEVMC;
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;
}
backend->type = CHARDEV_BACKEND_KIND_SPICEPORT;
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 char_spice_class_init(ObjectClass *oc, void *data)
{
ChardevClass *cc = CHARDEV_CLASS(oc);
cc->chr_write = spice_chr_write;
cc->chr_add_watch = spice_chr_add_watch;
cc->chr_accept_input = spice_chr_accept_input;
}
static const TypeInfo char_spice_type_info = {
.name = TYPE_CHARDEV_SPICE,
.parent = TYPE_CHARDEV,
.instance_size = sizeof(SpiceChardev),
.instance_finalize = char_spice_finalize,
.class_init = char_spice_class_init,
.abstract = true,
};
static void char_spicevmc_class_init(ObjectClass *oc, void *data)
{
ChardevClass *cc = CHARDEV_CLASS(oc);
cc->parse = qemu_chr_parse_spice_vmc;
cc->open = qemu_chr_open_spice_vmc;
cc->chr_set_fe_open = spice_vmc_set_fe_open;
}
static const TypeInfo char_spicevmc_type_info = {
.name = TYPE_CHARDEV_SPICEVMC,
.parent = TYPE_CHARDEV_SPICE,
.class_init = char_spicevmc_class_init,
};
static void char_spiceport_class_init(ObjectClass *oc, void *data)
{
ChardevClass *cc = CHARDEV_CLASS(oc);
cc->parse = qemu_chr_parse_spice_port;
cc->open = qemu_chr_open_spice_port;
cc->chr_set_fe_open = spice_port_set_fe_open;
}
static const TypeInfo char_spiceport_type_info = {
.name = TYPE_CHARDEV_SPICEPORT,
.parent = TYPE_CHARDEV_SPICE,
.class_init = char_spiceport_class_init,
};
static void register_types(void)
{
type_register_static(&char_spice_type_info);
type_register_static(&char_spicevmc_type_info);
type_register_static(&char_spiceport_type_info);
}
type_init(register_types);