185 lines
5.2 KiB
C
185 lines
5.2 KiB
C
/*
|
|
* QEMU live migration via socket
|
|
*
|
|
* Copyright Red Hat, Inc. 2009-2016
|
|
*
|
|
* Authors:
|
|
* Chris Lalancette <clalance@redhat.com>
|
|
* Daniel P. Berrange <berrange@redhat.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
* the COPYING file in the top-level directory.
|
|
*
|
|
* Contributions after 2012-01-13 are licensed under the terms of the
|
|
* GNU GPL, version 2 or (at your option) any later version.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qemu/cutils.h"
|
|
|
|
#include "qemu/error-report.h"
|
|
#include "qapi/error.h"
|
|
#include "channel.h"
|
|
#include "socket.h"
|
|
#include "migration.h"
|
|
#include "qemu-file.h"
|
|
#include "io/channel-socket.h"
|
|
#include "io/net-listener.h"
|
|
#include "trace.h"
|
|
|
|
|
|
struct SocketOutgoingArgs {
|
|
SocketAddress *saddr;
|
|
} outgoing_args;
|
|
|
|
void socket_send_channel_create(QIOTaskFunc f, void *data)
|
|
{
|
|
QIOChannelSocket *sioc = qio_channel_socket_new();
|
|
qio_channel_socket_connect_async(sioc, outgoing_args.saddr,
|
|
f, data, NULL, NULL);
|
|
}
|
|
|
|
int socket_send_channel_destroy(QIOChannel *send)
|
|
{
|
|
/* Remove channel */
|
|
object_unref(OBJECT(send));
|
|
if (outgoing_args.saddr) {
|
|
qapi_free_SocketAddress(outgoing_args.saddr);
|
|
outgoing_args.saddr = NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct SocketConnectData {
|
|
MigrationState *s;
|
|
char *hostname;
|
|
};
|
|
|
|
static void socket_connect_data_free(void *opaque)
|
|
{
|
|
struct SocketConnectData *data = opaque;
|
|
if (!data) {
|
|
return;
|
|
}
|
|
g_free(data->hostname);
|
|
g_free(data);
|
|
}
|
|
|
|
static void socket_outgoing_migration(QIOTask *task,
|
|
gpointer opaque)
|
|
{
|
|
struct SocketConnectData *data = opaque;
|
|
QIOChannel *sioc = QIO_CHANNEL(qio_task_get_source(task));
|
|
Error *err = NULL;
|
|
|
|
if (qio_task_propagate_error(task, &err)) {
|
|
trace_migration_socket_outgoing_error(error_get_pretty(err));
|
|
} else {
|
|
trace_migration_socket_outgoing_connected(data->hostname);
|
|
}
|
|
migration_channel_connect(data->s, sioc, data->hostname, err);
|
|
object_unref(OBJECT(sioc));
|
|
}
|
|
|
|
static void
|
|
socket_start_outgoing_migration_internal(MigrationState *s,
|
|
SocketAddress *saddr,
|
|
Error **errp)
|
|
{
|
|
QIOChannelSocket *sioc = qio_channel_socket_new();
|
|
struct SocketConnectData *data = g_new0(struct SocketConnectData, 1);
|
|
|
|
data->s = s;
|
|
|
|
/* in case previous migration leaked it */
|
|
qapi_free_SocketAddress(outgoing_args.saddr);
|
|
outgoing_args.saddr = saddr;
|
|
|
|
if (saddr->type == SOCKET_ADDRESS_TYPE_INET) {
|
|
data->hostname = g_strdup(saddr->u.inet.host);
|
|
}
|
|
|
|
qio_channel_set_name(QIO_CHANNEL(sioc), "migration-socket-outgoing");
|
|
qio_channel_socket_connect_async(sioc,
|
|
saddr,
|
|
socket_outgoing_migration,
|
|
data,
|
|
socket_connect_data_free,
|
|
NULL);
|
|
}
|
|
|
|
void socket_start_outgoing_migration(MigrationState *s,
|
|
const char *str,
|
|
Error **errp)
|
|
{
|
|
Error *err = NULL;
|
|
SocketAddress *saddr = socket_parse(str, &err);
|
|
if (!err) {
|
|
socket_start_outgoing_migration_internal(s, saddr, &err);
|
|
}
|
|
error_propagate(errp, err);
|
|
}
|
|
|
|
static void socket_accept_incoming_migration(QIONetListener *listener,
|
|
QIOChannelSocket *cioc,
|
|
gpointer opaque)
|
|
{
|
|
trace_migration_socket_incoming_accepted();
|
|
|
|
qio_channel_set_name(QIO_CHANNEL(cioc), "migration-socket-incoming");
|
|
migration_channel_process_incoming(QIO_CHANNEL(cioc));
|
|
|
|
if (migration_has_all_channels()) {
|
|
/* Close listening socket as its no longer needed */
|
|
qio_net_listener_disconnect(listener);
|
|
object_unref(OBJECT(listener));
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
socket_start_incoming_migration_internal(SocketAddress *saddr,
|
|
Error **errp)
|
|
{
|
|
QIONetListener *listener = qio_net_listener_new();
|
|
size_t i;
|
|
int num = 1;
|
|
|
|
qio_net_listener_set_name(listener, "migration-socket-listener");
|
|
|
|
if (migrate_use_multifd()) {
|
|
num = migrate_multifd_channels();
|
|
}
|
|
|
|
if (qio_net_listener_open_sync(listener, saddr, num, errp) < 0) {
|
|
object_unref(OBJECT(listener));
|
|
return;
|
|
}
|
|
|
|
qio_net_listener_set_client_func_full(listener,
|
|
socket_accept_incoming_migration,
|
|
NULL, NULL,
|
|
g_main_context_get_thread_default());
|
|
|
|
for (i = 0; i < listener->nsioc; i++) {
|
|
SocketAddress *address =
|
|
qio_channel_socket_get_local_address(listener->sioc[i], errp);
|
|
if (!address) {
|
|
return;
|
|
}
|
|
migrate_add_address(address);
|
|
qapi_free_SocketAddress(address);
|
|
}
|
|
}
|
|
|
|
void socket_start_incoming_migration(const char *str, Error **errp)
|
|
{
|
|
Error *err = NULL;
|
|
SocketAddress *saddr = socket_parse(str, &err);
|
|
if (!err) {
|
|
socket_start_incoming_migration_internal(saddr, &err);
|
|
}
|
|
qapi_free_SocketAddress(saddr);
|
|
error_propagate(errp, err);
|
|
}
|