We have just arrived as: migration.c: qemu_migrate() .... s = migrate_init() <- puts it to NULL .... {tcp,unix}_start_outgoing_migration -> socket_outgoing_migration migration_channel_connect() sets to_dst_file if tls is enabled, we do another round through migrate_channel_tls_connect(), but we only set it up if there is no error. So we don't need the assignation. I am removing it to remove in the follwing patches the knowledge about MigrationState in that two files. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Laurent Vivier <lvivier@redhat.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com>
199 lines
5.6 KiB
C
199 lines
5.6 KiB
C
/*
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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-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 *tcp_build_address(const char *host_port, Error **errp)
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{
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InetSocketAddress *iaddr = inet_parse(host_port, errp);
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SocketAddress *saddr;
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if (!iaddr) {
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return NULL;
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}
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saddr = g_new0(SocketAddress, 1);
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saddr->type = SOCKET_ADDRESS_KIND_INET;
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saddr->u.inet.data = iaddr;
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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_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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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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migrate_fd_error(data->s, err);
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error_free(err);
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} else {
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trace_migration_socket_outgoing_connected(data->hostname);
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migration_channel_connect(data->s, sioc, data->hostname);
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}
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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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if (saddr->type == SOCKET_ADDRESS_KIND_INET) {
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data->hostname = g_strdup(saddr->u.inet.data->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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qapi_free_SocketAddress(saddr);
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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 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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qio_channel_set_name(QIO_CHANNEL(sioc), "migration-socket-incoming");
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migration_channel_process_incoming(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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qio_channel_set_name(QIO_CHANNEL(listen_ioc),
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"migration-socket-listener");
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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 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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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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}
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