qemu/chardev/spice.c
Marc-André Lureau 8afbff1652 char: register spice ports after spice started
Spice port registration is delayed until the server is started. But
ports created after are not being registered. If the server is already
started, do vmc_register_interface() to register it from
qemu_chr_open_spice_port().

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Tested-by: Victor Toso <victortoso@redhat.com>
Message-id: 20190221110703.5775-8-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2019-02-21 14:09:17 +01:00

426 lines
11 KiB
C

#include "qemu/osdep.h"
#include "trace.h"
#include "ui/qemu-spice.h"
#include "chardev/char.h"
#include "chardev/spice.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "qemu/option.h"
#include <spice/protocol.h>
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;
}
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);
}
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,
.event = vmc_event,
#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;
Chardev *chr = CHARDEV(src->scd);
*timeout = -1;
if (!chr->be_open) {
return true;
}
return !src->scd->blocked;
}
static gboolean spice_char_source_check(GSource *source)
{
SpiceCharSource *src = (SpiceCharSource *)source;
Chardev *chr = CHARDEV(src->scd);
if (!chr->be_open) {
return true;
}
return !src->scd->blocked;
}
static gboolean spice_char_source_dispatch(GSource *source,
GSourceFunc callback, gpointer user_data)
{
SpiceCharSource *src = (SpiceCharSource *)source;
Chardev *chr = CHARDEV(src->scd);
GIOFunc func = (GIOFunc)callback;
GIOCondition cond = chr->be_open ? G_IO_OUT : G_IO_HUP;
return func(NULL, cond, 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);
if (!chr->be_open) {
trace_spice_chr_discard_write(len);
return len;
}
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);
if (s->next.le_prev) {
QLIST_REMOVE(s, next);
}
g_free((char *)s->sin.subtype);
g_free((char *)s->sin.portname);
}
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)
{
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);
}
}
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;
#if SPICE_SERVER_VERSION < 0x000e02
/* Spice < 0.14.2 doesn't explicitly open smartcard chardev */
if (strcmp(type, "smartcard") == 0) {
*be_opened = true;
}
#endif
chr_open(chr, type);
}
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);
if (using_spice) {
/* spice server already created */
vmc_register_interface(s);
}
}
void qemu_spice_register_ports(void)
{
SpiceChardev *s;
QLIST_FOREACH(s, &spice_chars, next) {
if (s->sin.portname == NULL) {
continue;
}
vmc_register_interface(s);
}
}
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);