mirror of https://github.com/proxmox/mirror_qemu
133 lines
3.9 KiB
C
133 lines
3.9 KiB
C
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/*
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* QEMU live migration via Unix Domain Sockets
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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-common.h"
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#include "qemu/error-report.h"
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#include "qapi/error.h"
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#include "migration/migration.h"
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#include "migration/qemu-file.h"
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#include "io/channel-socket.h"
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#include "trace.h"
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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_KIND_UNIX;
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saddr->u.q_unix.data = g_new0(UnixSocketAddress, 1);
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saddr->u.q_unix.data->path = g_strdup(path);
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return saddr;
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}
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static void socket_outgoing_migration(Object *src,
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Error *err,
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gpointer opaque)
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{
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MigrationState *s = opaque;
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QIOChannel *sioc = QIO_CHANNEL(src);
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if (err) {
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trace_migration_socket_outgoing_error(error_get_pretty(err));
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s->to_dst_file = NULL;
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migrate_fd_error(s, err);
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} else {
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trace_migration_socket_outgoing_connected();
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migration_set_outgoing_channel(s, sioc);
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}
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object_unref(src);
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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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qio_channel_socket_connect_async(sioc,
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saddr,
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socket_outgoing_migration,
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s,
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NULL);
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qapi_free_SocketAddress(saddr);
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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 gboolean socket_accept_incoming_migration(QIOChannel *ioc,
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GIOCondition condition,
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gpointer opaque)
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{
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QIOChannelSocket *sioc;
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Error *err = NULL;
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sioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc),
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&err);
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if (!sioc) {
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error_report("could not accept migration connection (%s)",
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error_get_pretty(err));
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goto out;
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}
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trace_migration_socket_incoming_accepted();
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migration_set_incoming_channel(migrate_get_current(),
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QIO_CHANNEL(sioc));
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object_unref(OBJECT(sioc));
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out:
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/* Close listening socket as its no longer needed */
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qio_channel_close(ioc, NULL);
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return FALSE; /* unregister */
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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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QIOChannelSocket *listen_ioc = qio_channel_socket_new();
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if (qio_channel_socket_listen_sync(listen_ioc, saddr, errp) < 0) {
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object_unref(OBJECT(listen_ioc));
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qapi_free_SocketAddress(saddr);
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return;
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}
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qio_channel_add_watch(QIO_CHANNEL(listen_ioc),
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G_IO_IN,
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socket_accept_incoming_migration,
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listen_ioc,
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(GDestroyNotify)object_unref);
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qapi_free_SocketAddress(saddr);
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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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}
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