Start migrating migration code into a migration directory

The migration code now occupies a fair chunk of the top level .c
files, it seems time to give it it's own directory.

I've not touched:
   arch_init.c - that's mostly RAM migration but has a few random other
                 bits
   savevm.c    - because it's built target specific

This is purely a code move; no code has changed.
   - it fails checkpatch because of old violations, it feels safer
     to keep this as purely a move and fix those at some mythical future
     date.

The xbzrle and vmstate tests are now only run for softmmu builds
since they require files in the migrate/ directory which is only built
for softmmu.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>

1 files changed, 0 insertions, 700 deletions

diff --git a/migration.c b/migration.c
deleted file mode 100644
index c49a05a165..0000000000
--- a/migration.c
+++ /dev/null
@@ -1,700 +0,0 @@
-/*
- * QEMU live migration
- *
- * Copyright IBM, Corp. 2008
- *
- * Authors:
- *  Anthony Liguori   <aliguori@us.ibm.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-common.h"
-#include "qemu/main-loop.h"
-#include "migration/migration.h"
-#include "monitor/monitor.h"
-#include "migration/qemu-file.h"
-#include "sysemu/sysemu.h"
-#include "block/block.h"
-#include "qemu/sockets.h"
-#include "migration/block.h"
-#include "qemu/thread.h"
-#include "qmp-commands.h"
-#include "trace.h"
-
-enum {
-    MIG_STATE_ERROR = -1,
-    MIG_STATE_NONE,
-    MIG_STATE_SETUP,
-    MIG_STATE_CANCELLING,
-    MIG_STATE_CANCELLED,
-    MIG_STATE_ACTIVE,
-    MIG_STATE_COMPLETED,
-};
-
-#define MAX_THROTTLE  (32 << 20)      /* Migration speed throttling */
-
-/* Amount of time to allocate to each "chunk" of bandwidth-throttled
- * data. */
-#define BUFFER_DELAY     100
-#define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY)
-
-/* Migration XBZRLE default cache size */
-#define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024)
-
-static NotifierList migration_state_notifiers =
-    NOTIFIER_LIST_INITIALIZER(migration_state_notifiers);
-
-/* When we add fault tolerance, we could have several
-   migrations at once.  For now we don't need to add
-   dynamic creation of migration */
-
-MigrationState *migrate_get_current(void)
-{
-    static MigrationState current_migration = {
-        .state = MIG_STATE_NONE,
-        .bandwidth_limit = MAX_THROTTLE,
-        .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE,
-        .mbps = -1,
-    };
-
-    return &current_migration;
-}
-
-void qemu_start_incoming_migration(const char *uri, Error **errp)
-{
-    const char *p;
-
-    if (strstart(uri, "tcp:", &p))
-        tcp_start_incoming_migration(p, errp);
-#ifdef CONFIG_RDMA
-    else if (strstart(uri, "rdma:", &p))
-        rdma_start_incoming_migration(p, errp);
-#endif
-#if !defined(WIN32)
-    else if (strstart(uri, "exec:", &p))
-        exec_start_incoming_migration(p, errp);
-    else if (strstart(uri, "unix:", &p))
-        unix_start_incoming_migration(p, errp);
-    else if (strstart(uri, "fd:", &p))
-        fd_start_incoming_migration(p, errp);
-#endif
-    else {
-        error_setg(errp, "unknown migration protocol: %s", uri);
-    }
-}
-
-static void process_incoming_migration_co(void *opaque)
-{
-    QEMUFile *f = opaque;
-    Error *local_err = NULL;
-    int ret;
-
-    ret = qemu_loadvm_state(f);
-    qemu_fclose(f);
-    free_xbzrle_decoded_buf();
-    if (ret < 0) {
-        error_report("load of migration failed: %s", strerror(-ret));
-        exit(EXIT_FAILURE);
-    }
-    qemu_announce_self();
-
-    /* Make sure all file formats flush their mutable metadata */
-    bdrv_invalidate_cache_all(&local_err);
-    if (local_err) {
-        qerror_report_err(local_err);
-        error_free(local_err);
-        exit(EXIT_FAILURE);
-    }
-
-    if (autostart) {
-        vm_start();
-    } else {
-        runstate_set(RUN_STATE_PAUSED);
-    }
-}
-
-void process_incoming_migration(QEMUFile *f)
-{
-    Coroutine *co = qemu_coroutine_create(process_incoming_migration_co);
-    int fd = qemu_get_fd(f);
-
-    assert(fd != -1);
-    qemu_set_nonblock(fd);
-    qemu_coroutine_enter(co, f);
-}
-
-/* amount of nanoseconds we are willing to wait for migration to be down.
- * the choice of nanoseconds is because it is the maximum resolution that
- * get_clock() can achieve. It is an internal measure. All user-visible
- * units must be in seconds */
-static uint64_t max_downtime = 300000000;
-
-uint64_t migrate_max_downtime(void)
-{
-    return max_downtime;
-}
-
-MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp)
-{
-    MigrationCapabilityStatusList *head = NULL;
-    MigrationCapabilityStatusList *caps;
-    MigrationState *s = migrate_get_current();
-    int i;
-
-    caps = NULL; /* silence compiler warning */
-    for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) {
-        if (head == NULL) {
-            head = g_malloc0(sizeof(*caps));
-            caps = head;
-        } else {
-            caps->next = g_malloc0(sizeof(*caps));
-            caps = caps->next;
-        }
-        caps->value =
-            g_malloc(sizeof(*caps->value));
-        caps->value->capability = i;
-        caps->value->state = s->enabled_capabilities[i];
-    }
-
-    return head;
-}
-
-static void get_xbzrle_cache_stats(MigrationInfo *info)
-{
-    if (migrate_use_xbzrle()) {
-        info->has_xbzrle_cache = true;
-        info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache));
-        info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size();
-        info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred();
-        info->xbzrle_cache->pages = xbzrle_mig_pages_transferred();
-        info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss();
-        info->xbzrle_cache->cache_miss_rate = xbzrle_mig_cache_miss_rate();
-        info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow();
-    }
-}
-
-MigrationInfo *qmp_query_migrate(Error **errp)
-{
-    MigrationInfo *info = g_malloc0(sizeof(*info));
-    MigrationState *s = migrate_get_current();
-
-    switch (s->state) {
-    case MIG_STATE_NONE:
-        /* no migration has happened ever */
-        break;
-    case MIG_STATE_SETUP:
-        info->has_status = true;
-        info->status = g_strdup("setup");
-        info->has_total_time = false;
-        break;
-    case MIG_STATE_ACTIVE:
-    case MIG_STATE_CANCELLING:
-        info->has_status = true;
-        info->status = g_strdup("active");
-        info->has_total_time = true;
-        info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME)
-            - s->total_time;
-        info->has_expected_downtime = true;
-        info->expected_downtime = s->expected_downtime;
-        info->has_setup_time = true;
-        info->setup_time = s->setup_time;
-
-        info->has_ram = true;
-        info->ram = g_malloc0(sizeof(*info->ram));
-        info->ram->transferred = ram_bytes_transferred();
-        info->ram->remaining = ram_bytes_remaining();
-        info->ram->total = ram_bytes_total();
-        info->ram->duplicate = dup_mig_pages_transferred();
-        info->ram->skipped = skipped_mig_pages_transferred();
-        info->ram->normal = norm_mig_pages_transferred();
-        info->ram->normal_bytes = norm_mig_bytes_transferred();
-        info->ram->dirty_pages_rate = s->dirty_pages_rate;
-        info->ram->mbps = s->mbps;
-        info->ram->dirty_sync_count = s->dirty_sync_count;
-
-        if (blk_mig_active()) {
-            info->has_disk = true;
-            info->disk = g_malloc0(sizeof(*info->disk));
-            info->disk->transferred = blk_mig_bytes_transferred();
-            info->disk->remaining = blk_mig_bytes_remaining();
-            info->disk->total = blk_mig_bytes_total();
-        }
-
-        get_xbzrle_cache_stats(info);
-        break;
-    case MIG_STATE_COMPLETED:
-        get_xbzrle_cache_stats(info);
-
-        info->has_status = true;
-        info->status = g_strdup("completed");
-        info->has_total_time = true;
-        info->total_time = s->total_time;
-        info->has_downtime = true;
-        info->downtime = s->downtime;
-        info->has_setup_time = true;
-        info->setup_time = s->setup_time;
-
-        info->has_ram = true;
-        info->ram = g_malloc0(sizeof(*info->ram));
-        info->ram->transferred = ram_bytes_transferred();
-        info->ram->remaining = 0;
-        info->ram->total = ram_bytes_total();
-        info->ram->duplicate = dup_mig_pages_transferred();
-        info->ram->skipped = skipped_mig_pages_transferred();
-        info->ram->normal = norm_mig_pages_transferred();
-        info->ram->normal_bytes = norm_mig_bytes_transferred();
-        info->ram->mbps = s->mbps;
-        info->ram->dirty_sync_count = s->dirty_sync_count;
-        break;
-    case MIG_STATE_ERROR:
-        info->has_status = true;
-        info->status = g_strdup("failed");
-        break;
-    case MIG_STATE_CANCELLED:
-        info->has_status = true;
-        info->status = g_strdup("cancelled");
-        break;
-    }
-
-    return info;
-}
-
-void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
-                                  Error **errp)
-{
-    MigrationState *s = migrate_get_current();
-    MigrationCapabilityStatusList *cap;
-
-    if (s->state == MIG_STATE_ACTIVE || s->state == MIG_STATE_SETUP) {
-        error_set(errp, QERR_MIGRATION_ACTIVE);
-        return;
-    }
-
-    for (cap = params; cap; cap = cap->next) {
-        s->enabled_capabilities[cap->value->capability] = cap->value->state;
-    }
-}
-
-/* shared migration helpers */
-
-static void migrate_set_state(MigrationState *s, int old_state, int new_state)
-{
-    if (atomic_cmpxchg(&s->state, old_state, new_state) == new_state) {
-        trace_migrate_set_state(new_state);
-    }
-}
-
-static void migrate_fd_cleanup(void *opaque)
-{
-    MigrationState *s = opaque;
-
-    qemu_bh_delete(s->cleanup_bh);
-    s->cleanup_bh = NULL;
-
-    if (s->file) {
-        trace_migrate_fd_cleanup();
-        qemu_mutex_unlock_iothread();
-        qemu_thread_join(&s->thread);
-        qemu_mutex_lock_iothread();
-
-        qemu_fclose(s->file);
-        s->file = NULL;
-    }
-
-    assert(s->state != MIG_STATE_ACTIVE);
-
-    if (s->state != MIG_STATE_COMPLETED) {
-        qemu_savevm_state_cancel();
-        if (s->state == MIG_STATE_CANCELLING) {
-            migrate_set_state(s, MIG_STATE_CANCELLING, MIG_STATE_CANCELLED);
-        }
-    }
-
-    notifier_list_notify(&migration_state_notifiers, s);
-}
-
-void migrate_fd_error(MigrationState *s)
-{
-    trace_migrate_fd_error();
-    assert(s->file == NULL);
-    s->state = MIG_STATE_ERROR;
-    trace_migrate_set_state(MIG_STATE_ERROR);
-    notifier_list_notify(&migration_state_notifiers, s);
-}
-
-static void migrate_fd_cancel(MigrationState *s)
-{
-    int old_state ;
-    trace_migrate_fd_cancel();
-
-    do {
-        old_state = s->state;
-        if (old_state != MIG_STATE_SETUP && old_state != MIG_STATE_ACTIVE) {
-            break;
-        }
-        migrate_set_state(s, old_state, MIG_STATE_CANCELLING);
-    } while (s->state != MIG_STATE_CANCELLING);
-}
-
-void add_migration_state_change_notifier(Notifier *notify)
-{
-    notifier_list_add(&migration_state_notifiers, notify);
-}
-
-void remove_migration_state_change_notifier(Notifier *notify)
-{
-    notifier_remove(notify);
-}
-
-bool migration_in_setup(MigrationState *s)
-{
-    return s->state == MIG_STATE_SETUP;
-}
-
-bool migration_has_finished(MigrationState *s)
-{
-    return s->state == MIG_STATE_COMPLETED;
-}
-
-bool migration_has_failed(MigrationState *s)
-{
-    return (s->state == MIG_STATE_CANCELLED ||
-            s->state == MIG_STATE_ERROR);
-}
-
-static MigrationState *migrate_init(const MigrationParams *params)
-{
-    MigrationState *s = migrate_get_current();
-    int64_t bandwidth_limit = s->bandwidth_limit;
-    bool enabled_capabilities[MIGRATION_CAPABILITY_MAX];
-    int64_t xbzrle_cache_size = s->xbzrle_cache_size;
-
-    memcpy(enabled_capabilities, s->enabled_capabilities,
-           sizeof(enabled_capabilities));
-
-    memset(s, 0, sizeof(*s));
-    s->params = *params;
-    memcpy(s->enabled_capabilities, enabled_capabilities,
-           sizeof(enabled_capabilities));
-    s->xbzrle_cache_size = xbzrle_cache_size;
-
-    s->bandwidth_limit = bandwidth_limit;
-    s->state = MIG_STATE_SETUP;
-    trace_migrate_set_state(MIG_STATE_SETUP);
-
-    s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
-    return s;
-}
-
-static GSList *migration_blockers;
-
-void migrate_add_blocker(Error *reason)
-{
-    migration_blockers = g_slist_prepend(migration_blockers, reason);
-}
-
-void migrate_del_blocker(Error *reason)
-{
-    migration_blockers = g_slist_remove(migration_blockers, reason);
-}
-
-void qmp_migrate(const char *uri, bool has_blk, bool blk,
-                 bool has_inc, bool inc, bool has_detach, bool detach,
-                 Error **errp)
-{
-    Error *local_err = NULL;
-    MigrationState *s = migrate_get_current();
-    MigrationParams params;
-    const char *p;
-
-    params.blk = has_blk && blk;
-    params.shared = has_inc && inc;
-
-    if (s->state == MIG_STATE_ACTIVE || s->state == MIG_STATE_SETUP ||
-        s->state == MIG_STATE_CANCELLING) {
-        error_set(errp, QERR_MIGRATION_ACTIVE);
-        return;
-    }
-
-    if (runstate_check(RUN_STATE_INMIGRATE)) {
-        error_setg(errp, "Guest is waiting for an incoming migration");
-        return;
-    }
-
-    if (qemu_savevm_state_blocked(errp)) {
-        return;
-    }
-
-    if (migration_blockers) {
-        *errp = error_copy(migration_blockers->data);
-        return;
-    }
-
-    s = migrate_init(&params);
-
-    if (strstart(uri, "tcp:", &p)) {
-        tcp_start_outgoing_migration(s, p, &local_err);
-#ifdef CONFIG_RDMA
-    } else if (strstart(uri, "rdma:", &p)) {
-        rdma_start_outgoing_migration(s, p, &local_err);
-#endif
-#if !defined(WIN32)
-    } else if (strstart(uri, "exec:", &p)) {
-        exec_start_outgoing_migration(s, p, &local_err);
-    } else if (strstart(uri, "unix:", &p)) {
-        unix_start_outgoing_migration(s, p, &local_err);
-    } else if (strstart(uri, "fd:", &p)) {
-        fd_start_outgoing_migration(s, p, &local_err);
-#endif
-    } else {
-        error_set(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol");
-        s->state = MIG_STATE_ERROR;
-        return;
-    }
-
-    if (local_err) {
-        migrate_fd_error(s);
-        error_propagate(errp, local_err);
-        return;
-    }
-}
-
-void qmp_migrate_cancel(Error **errp)
-{
-    migrate_fd_cancel(migrate_get_current());
-}
-
-void qmp_migrate_set_cache_size(int64_t value, Error **errp)
-{
-    MigrationState *s = migrate_get_current();
-    int64_t new_size;
-
-    /* Check for truncation */
-    if (value != (size_t)value) {
-        error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size",
-                  "exceeding address space");
-        return;
-    }
-
-    /* Cache should not be larger than guest ram size */
-    if (value > ram_bytes_total()) {
-        error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size",
-                  "exceeds guest ram size ");
-        return;
-    }
-
-    new_size = xbzrle_cache_resize(value);
-    if (new_size < 0) {
-        error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size",
-                  "is smaller than page size");
-        return;
-    }
-
-    s->xbzrle_cache_size = new_size;
-}
-
-int64_t qmp_query_migrate_cache_size(Error **errp)
-{
-    return migrate_xbzrle_cache_size();
-}
-
-void qmp_migrate_set_speed(int64_t value, Error **errp)
-{
-    MigrationState *s;
-
-    if (value < 0) {
-        value = 0;
-    }
-    if (value > SIZE_MAX) {
-        value = SIZE_MAX;
-    }
-
-    s = migrate_get_current();
-    s->bandwidth_limit = value;
-    if (s->file) {
-        qemu_file_set_rate_limit(s->file, s->bandwidth_limit / XFER_LIMIT_RATIO);
-    }
-}
-
-void qmp_migrate_set_downtime(double value, Error **errp)
-{
-    value *= 1e9;
-    value = MAX(0, MIN(UINT64_MAX, value));
-    max_downtime = (uint64_t)value;
-}
-
-bool migrate_rdma_pin_all(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->enabled_capabilities[MIGRATION_CAPABILITY_RDMA_PIN_ALL];
-}
-
-bool migrate_auto_converge(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE];
-}
-
-bool migrate_zero_blocks(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS];
-}
-
-int migrate_use_xbzrle(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE];
-}
-
-int64_t migrate_xbzrle_cache_size(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->xbzrle_cache_size;
-}
-
-/* migration thread support */
-
-static void *migration_thread(void *opaque)
-{
-    MigrationState *s = opaque;
-    int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
-    int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST);
-    int64_t initial_bytes = 0;
-    int64_t max_size = 0;
-    int64_t start_time = initial_time;
-    bool old_vm_running = false;
-
-    qemu_savevm_state_begin(s->file, &s->params);
-
-    s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start;
-    migrate_set_state(s, MIG_STATE_SETUP, MIG_STATE_ACTIVE);
-
-    while (s->state == MIG_STATE_ACTIVE) {
-        int64_t current_time;
-        uint64_t pending_size;
-
-        if (!qemu_file_rate_limit(s->file)) {
-            pending_size = qemu_savevm_state_pending(s->file, max_size);
-            trace_migrate_pending(pending_size, max_size);
-            if (pending_size && pending_size >= max_size) {
-                qemu_savevm_state_iterate(s->file);
-            } else {
-                int ret;
-
-                qemu_mutex_lock_iothread();
-                start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
-                qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
-                old_vm_running = runstate_is_running();
-
-                ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
-                if (ret >= 0) {
-                    qemu_file_set_rate_limit(s->file, INT64_MAX);
-                    qemu_savevm_state_complete(s->file);
-                }
-                qemu_mutex_unlock_iothread();
-
-                if (ret < 0) {
-                    migrate_set_state(s, MIG_STATE_ACTIVE, MIG_STATE_ERROR);
-                    break;
-                }
-
-                if (!qemu_file_get_error(s->file)) {
-                    migrate_set_state(s, MIG_STATE_ACTIVE, MIG_STATE_COMPLETED);
-                    break;
-                }
-            }
-        }
-
-        if (qemu_file_get_error(s->file)) {
-            migrate_set_state(s, MIG_STATE_ACTIVE, MIG_STATE_ERROR);
-            break;
-        }
-        current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
-        if (current_time >= initial_time + BUFFER_DELAY) {
-            uint64_t transferred_bytes = qemu_ftell(s->file) - initial_bytes;
-            uint64_t time_spent = current_time - initial_time;
-            double bandwidth = transferred_bytes / time_spent;
-            max_size = bandwidth * migrate_max_downtime() / 1000000;
-
-            s->mbps = time_spent ? (((double) transferred_bytes * 8.0) /
-                    ((double) time_spent / 1000.0)) / 1000.0 / 1000.0 : -1;
-
-            trace_migrate_transferred(transferred_bytes, time_spent,
-                                      bandwidth, max_size);
-            /* if we haven't sent anything, we don't want to recalculate
-               10000 is a small enough number for our purposes */
-            if (s->dirty_bytes_rate && transferred_bytes > 10000) {
-                s->expected_downtime = s->dirty_bytes_rate / bandwidth;
-            }
-
-            qemu_file_reset_rate_limit(s->file);
-            initial_time = current_time;
-            initial_bytes = qemu_ftell(s->file);
-        }
-        if (qemu_file_rate_limit(s->file)) {
-            /* usleep expects microseconds */
-            g_usleep((initial_time + BUFFER_DELAY - current_time)*1000);
-        }
-    }
-
-    qemu_mutex_lock_iothread();
-    if (s->state == MIG_STATE_COMPLETED) {
-        int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
-        uint64_t transferred_bytes = qemu_ftell(s->file);
-        s->total_time = end_time - s->total_time;
-        s->downtime = end_time - start_time;
-        if (s->total_time) {
-            s->mbps = (((double) transferred_bytes * 8.0) /
-                       ((double) s->total_time)) / 1000;
-        }
-        runstate_set(RUN_STATE_POSTMIGRATE);
-    } else {
-        if (old_vm_running) {
-            vm_start();
-        }
-    }
-    qemu_bh_schedule(s->cleanup_bh);
-    qemu_mutex_unlock_iothread();
-
-    return NULL;
-}
-
-void migrate_fd_connect(MigrationState *s)
-{
-    s->state = MIG_STATE_SETUP;
-    trace_migrate_set_state(MIG_STATE_SETUP);
-
-    /* This is a best 1st approximation. ns to ms */
-    s->expected_downtime = max_downtime/1000000;
-    s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s);
-
-    qemu_file_set_rate_limit(s->file,
-                             s->bandwidth_limit / XFER_LIMIT_RATIO);
-
-    /* Notify before starting migration thread */
-    notifier_list_notify(&migration_state_notifiers, s);
-
-    qemu_thread_create(&s->thread, "migration", migration_thread, s,
-                       QEMU_THREAD_JOINABLE);
-}