static void process_incoming_migration_co(void *opaque)
{
QEMUFile *f = opaque;
int ret;
ret = qemu_loadvm_state(f);
qemu_set_fd_handler(qemu_get_fd(f), NULL, NULL, NULL);
qemu_fclose(f);
if (ret < 0) {
fprintf(stderr, "load of migration failed\n");
exit(0);
}
qemu_announce_self();
DPRINTF("successfully loaded vm state\n");
bdrv_clear_incoming_migration_all();
/* Make sure all file formats flush their mutable metadata */
bdrv_invalidate_cache_all();
if (autostart) {
vm_start();
} else {
runstate_set(RUN_STATE_PAUSED);
}
}
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 ¤t_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;
int ret;
ret = qemu_loadvm_state(f);
qemu_fclose(f);
free_xbzrle_decoded_buf();
if (ret < 0) {
fprintf(stderr, "load of migration failed\n");
exit(EXIT_FAILURE);
}
qemu_announce_self();
DPRINTF("successfully loaded vm state\n");
bdrv_clear_incoming_migration_all();
/* Make sure all file formats flush their mutable metadata */
bdrv_invalidate_cache_all();
if (autostart) {
vm_start();
} else {
runstate_set(RUN_STATE_PAUSED);
}
}
/* does a state transition even if the VM is already stopped,
current state is forgotten forever */
void vm_stop_force_state(RunState state)
{
if (runstate_is_running()) {
vm_stop(state);
} else {
runstate_set(state);
}
}
/* does a state transition even if the VM is already stopped,
current state is forgotten forever */
void vm_stop_force_state(RunState state)
{
if (runstate_is_running()) {
vm_stop(state);
} else {
//if(!mthread){
runstate_set(state);
//}
}
}
static void migrate_fd_completed(MigrationState *s)
{
DPRINTF("setting completed state\n");
if (migrate_fd_cleanup(s) < 0) {
s->state = MIG_STATE_ERROR;
} else {
s->state = MIG_STATE_COMPLETED;
runstate_set(RUN_STATE_POSTMIGRATE);
}
notifier_list_notify(&migration_state_notifiers, s);
}
/* does a state transition even if the VM is already stopped,
current state is forgotten forever */
int vm_stop_force_state(RunState state)
{
if (runstate_is_running()) {
return vm_stop(state);
} else {
runstate_set(state);
/* Make sure to return an error if the flush in a previous vm_stop()
* failed. */
return bdrv_flush_all();
}
}
static void do_vm_stop(RunState state)
{
if (runstate_is_running()) {
cpu_disable_ticks();
pause_all_vcpus();
runstate_set(state);
vm_state_notify(0, state);
bdrv_drain_all();
bdrv_flush_all();
monitor_protocol_event(QEVENT_STOP, NULL);
}
}
/* Resume execution. */
static inline void gdb_continue(GDBState *s)
{
#ifdef CONFIG_USER_ONLY
s->running_state = 1;
#else
if (runstate_check(RUN_STATE_GUEST_PANICKED)) {
runstate_set(RUN_STATE_DEBUG);
}
if (!runstate_needs_reset()) {
vm_start();
}
#endif
}
static void do_vm_stop(RunState state)
{
if (runstate_is_running()) {
cpu_disable_ticks();
pause_all_vcpus();
//if(!mthread){ // TLC
runstate_set(state);
//}
vm_state_notify(0, state);
qemu_aio_flush();
bdrv_flush_all();
monitor_protocol_event(QEVENT_STOP, NULL);
}
}
void process_incoming_migration(QEMUFile *f)
{
if (qemu_loadvm_state(f) < 0) {
fprintf(stderr, "load of migration failed\n");
exit(0);
}
qemu_announce_self();
DPRINTF("successfully loaded vm state\n");
if (autostart) {
vm_start();
} else {
runstate_set(RSTATE_PRE_LAUNCH);
}
}
void process_incoming_migration(QEMUFile *f)
{
if (qemu_loadvm_state(f) < 0) {
fprintf(stderr, "load of migration failed\n");
exit(0);
}
qemu_announce_self();
DPRINTF("successfully loaded vm state\n");
/* Make sure all file formats flush their mutable metadata */
bdrv_invalidate_cache_all();
if (autostart) {
vm_start();
} else {
runstate_set(RUN_STATE_PRELAUNCH);
}
}
void migrate_fd_put_ready(void *opaque)
{
FdMigrationState *s = opaque;
if (s->state != MIG_STATE_ACTIVE) {
DPRINTF("put_ready returning because of non-active state\n");
return;
}
DPRINTF("iterate\n");
if (qemu_savevm_state_iterate(s->mon, s->file) == 1) {
int state;
int old_vm_running = runstate_is_running();
DPRINTF("done iterating\n");
vm_stop(RSTATE_PRE_MIGRATE);
if ((qemu_savevm_state_complete(s->mon, s->file)) < 0) {
if (old_vm_running) {
vm_start();
}
state = MIG_STATE_ERROR;
} else {
state = MIG_STATE_COMPLETED;
}
if (migrate_fd_cleanup(s) < 0) {
if (old_vm_running) {
vm_start();
}
state = MIG_STATE_ERROR;
}
if (state == MIG_STATE_COMPLETED) {
runstate_set(RSTATE_POST_MIGRATE);
}
s->state = state;
notifier_list_notify(&migration_state_notifiers, NULL);
}
}
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;
DPRINTF("beginning savevm\n");
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);
DPRINTF("setup complete\n");
while (s->state == MIG_STATE_ACTIVE) {
int64_t current_time;
uint64_t pending_size;
if (!qemu_file_rate_limit(s->file)) {
DPRINTF("iterate\n");
pending_size = qemu_savevm_state_pending(s->file, max_size);
DPRINTF("pending size %" PRIu64 " max %" PRIu64 "\n",
pending_size, max_size);
if (pending_size && pending_size >= max_size) {
qemu_savevm_state_iterate(s->file);
} else {
int ret;
DPRINTF("done iterating\n");
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;
DPRINTF("transferred %" PRIu64 " time_spent %" PRIu64
" bandwidth %g max_size %" PRId64 "\n",
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);
s->total_time = end_time - s->total_time;
s->downtime = end_time - start_time;
runstate_set(RUN_STATE_POSTMIGRATE);
} else {
if (old_vm_running) {
vm_start();
}
}
qemu_bh_schedule(s->cleanup_bh);
qemu_mutex_unlock_iothread();
return NULL;
}
MigrationState *migrate_get_current(void)
{
static MigrationState current_migration = {
.state = MIGRATION_STATUS_NONE,
.bandwidth_limit = MAX_THROTTLE,
.xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE,
.mbps = -1,
.parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] =
DEFAULT_MIGRATE_COMPRESS_LEVEL,
.parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] =
DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT,
.parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] =
DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT,
};
return ¤t_migration;
}
/*
* Called on -incoming with a defer: uri.
* The migration can be started later after any parameters have been
* changed.
*/
static void deferred_incoming_migration(Error **errp)
{
if (deferred_incoming) {
error_setg(errp, "Incoming migration already deferred");
}
deferred_incoming = true;
}
void qemu_start_incoming_migration(const char *uri, Error **errp)
{
const char *p;
if (!strcmp(uri, "defer")) {
deferred_incoming_migration(errp);
} else 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));
migrate_decompress_threads_join();
exit(EXIT_FAILURE);
}
qemu_announce_self();
/* Make sure all file formats flush their mutable metadata */
bdrv_invalidate_cache_all(&local_err);
if (local_err) {
error_report_err(local_err);
migrate_decompress_threads_join();
exit(EXIT_FAILURE);
}
if (autostart) {
vm_start();
} else {
runstate_set(RUN_STATE_PAUSED);
}
migrate_decompress_threads_join();
}
