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